Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[linux-3.10.git] / drivers / usb / serial / io_ti.c
1 /*
2  * Edgeport USB Serial Converter driver
3  *
4  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6  *
7  *      This program is free software; you can redistribute it and/or modify
8  *      it under the terms of the GNU General Public License as published by
9  *      the Free Software Foundation; either version 2 of the License, or
10  *      (at your option) any later version.
11  *
12  * Supports the following devices:
13  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
14  *
15  * For questions or problems with this driver, contact Inside Out
16  * Networks technical support, or Peter Berger <pberger@brimson.com>,
17  * or Al Borchers <alborchers@steinerpoint.com>.
18  *
19  * Version history:
20  *
21  *      July 11, 2002   Removed 4 port device structure since all TI UMP
22  *                      chips have only 2 ports
23  *                      David Iacovelli (davidi@ionetworks.com)
24  *
25  */
26
27 #include <linux/kernel.h>
28 #include <linux/jiffies.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/tty.h>
33 #include <linux/tty_driver.h>
34 #include <linux/tty_flip.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
37 #include <linux/mutex.h>
38 #include <linux/serial.h>
39 #include <linux/kfifo.h>
40 #include <linux/ioctl.h>
41 #include <linux/firmware.h>
42 #include <linux/uaccess.h>
43 #include <linux/usb.h>
44 #include <linux/usb/serial.h>
45
46 #include "io_16654.h"
47 #include "io_usbvend.h"
48 #include "io_ti.h"
49
50 /*
51  * Version Information
52  */
53 #define DRIVER_VERSION "v0.7mode043006"
54 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
55 #define DRIVER_DESC "Edgeport USB Serial Driver"
56
57 #define EPROM_PAGE_SIZE         64
58
59
60 /* different hardware types */
61 #define HARDWARE_TYPE_930       0
62 #define HARDWARE_TYPE_TIUMP     1
63
64 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
65 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
66 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
67 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
68 #define TI_MODE_TRANSITIONING   3   /* Currently in boot mode but
69                                        transitioning to download mode      */
70
71 /* read urb state */
72 #define EDGE_READ_URB_RUNNING   0
73 #define EDGE_READ_URB_STOPPING  1
74 #define EDGE_READ_URB_STOPPED   2
75
76 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
77
78 #define EDGE_OUT_BUF_SIZE       1024
79
80
81 /* Product information read from the Edgeport */
82 struct product_info {
83         int     TiMode;                 /* Current TI Mode  */
84         __u8    hardware_type;          /* Type of hardware */
85 } __attribute__((packed));
86
87 struct edgeport_port {
88         __u16 uart_base;
89         __u16 dma_address;
90         __u8 shadow_msr;
91         __u8 shadow_mcr;
92         __u8 shadow_lsr;
93         __u8 lsr_mask;
94         __u32 ump_read_timeout;         /* Number of milliseconds the UMP will
95                                            wait without data before completing
96                                            a read short */
97         int baud_rate;
98         int close_pending;
99         int lsr_event;
100         struct async_icount     icount;
101         wait_queue_head_t       delta_msr_wait; /* for handling sleeping while
102                                                    waiting for msr change to
103                                                    happen */
104         struct edgeport_serial  *edge_serial;
105         struct usb_serial_port  *port;
106         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
107         spinlock_t ep_lock;
108         int ep_read_urb_state;
109         int ep_write_urb_in_use;
110         struct kfifo write_fifo;
111 };
112
113 struct edgeport_serial {
114         struct product_info product_info;
115         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
116         u8 TiReadI2C;                   /* Set to TRUE if we have read the
117                                            I2c in Boot Mode */
118         struct mutex es_lock;
119         int num_ports_open;
120         struct usb_serial *serial;
121 };
122
123
124 /* Devices that this driver supports */
125 static const struct usb_device_id edgeport_1port_id_table[] = {
126         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
127         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
128         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
129         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
130         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
131         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
132         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
133         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
134         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
135         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
136         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
142         { }
143 };
144
145 static const struct usb_device_id edgeport_2port_id_table[] = {
146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
155         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
156         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
158         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
164         { }
165 };
166
167 /* Devices that this driver supports */
168 static const struct usb_device_id id_table_combined[] = {
169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
176         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
202         { }
203 };
204
205 MODULE_DEVICE_TABLE(usb, id_table_combined);
206
207 static struct usb_driver io_driver = {
208         .name =         "io_ti",
209         .probe =        usb_serial_probe,
210         .disconnect =   usb_serial_disconnect,
211         .id_table =     id_table_combined,
212         .no_dynamic_id =        1,
213 };
214
215
216 static unsigned char OperationalMajorVersion;
217 static unsigned char OperationalMinorVersion;
218 static unsigned short OperationalBuildNumber;
219
220 static int debug;
221
222 static int closing_wait = EDGE_CLOSING_WAIT;
223 static int ignore_cpu_rev;
224 static int default_uart_mode;           /* RS232 */
225
226 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
227                           unsigned char *data, int length);
228
229 static void stop_read(struct edgeport_port *edge_port);
230 static int restart_read(struct edgeport_port *edge_port);
231
232 static void edge_set_termios(struct tty_struct *tty,
233                 struct usb_serial_port *port, struct ktermios *old_termios);
234 static void edge_send(struct tty_struct *tty);
235
236 /* sysfs attributes */
237 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
238 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
239
240
241 static int ti_vread_sync(struct usb_device *dev, __u8 request,
242                                 __u16 value, __u16 index, u8 *data, int size)
243 {
244         int status;
245
246         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
247                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
248                         value, index, data, size, 1000);
249         if (status < 0)
250                 return status;
251         if (status != size) {
252                 dbg("%s - wanted to write %d, but only wrote %d",
253                                              __func__, size, status);
254                 return -ECOMM;
255         }
256         return 0;
257 }
258
259 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
260                                 __u16 value, __u16 index, u8 *data, int size)
261 {
262         int status;
263
264         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
265                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
266                         value, index, data, size, 1000);
267         if (status < 0)
268                 return status;
269         if (status != size) {
270                 dbg("%s - wanted to write %d, but only wrote %d",
271                      __func__, size, status);
272                 return -ECOMM;
273         }
274         return 0;
275 }
276
277 static int send_cmd(struct usb_device *dev, __u8 command,
278                                 __u8 moduleid, __u16 value, u8 *data,
279                                 int size)
280 {
281         return ti_vsend_sync(dev, command, value, moduleid, data, size);
282 }
283
284 /* clear tx/rx buffers and fifo in TI UMP */
285 static int purge_port(struct usb_serial_port *port, __u16 mask)
286 {
287         int port_number = port->number - port->serial->minor;
288
289         dbg("%s - port %d, mask %x", __func__, port_number, mask);
290
291         return send_cmd(port->serial->dev,
292                                         UMPC_PURGE_PORT,
293                                         (__u8)(UMPM_UART1_PORT + port_number),
294                                         mask,
295                                         NULL,
296                                         0);
297 }
298
299 /**
300  * read_download_mem - Read edgeport memory from TI chip
301  * @dev: usb device pointer
302  * @start_address: Device CPU address at which to read
303  * @length: Length of above data
304  * @address_type: Can read both XDATA and I2C
305  * @buffer: pointer to input data buffer
306  */
307 static int read_download_mem(struct usb_device *dev, int start_address,
308                                 int length, __u8 address_type, __u8 *buffer)
309 {
310         int status = 0;
311         __u8 read_length;
312         __be16 be_start_address;
313
314         dbg("%s - @ %x for %d", __func__, start_address, length);
315
316         /* Read in blocks of 64 bytes
317          * (TI firmware can't handle more than 64 byte reads)
318          */
319         while (length) {
320                 if (length > 64)
321                         read_length = 64;
322                 else
323                         read_length = (__u8)length;
324
325                 if (read_length > 1) {
326                         dbg("%s - @ %x for %d", __func__,
327                              start_address, read_length);
328                 }
329                 be_start_address = cpu_to_be16(start_address);
330                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
331                                         (__u16)address_type,
332                                         (__force __u16)be_start_address,
333                                         buffer, read_length);
334
335                 if (status) {
336                         dbg("%s - ERROR %x", __func__, status);
337                         return status;
338                 }
339
340                 if (read_length > 1)
341                         usb_serial_debug_data(debug, &dev->dev, __func__,
342                                               read_length, buffer);
343
344                 /* Update pointers/length */
345                 start_address += read_length;
346                 buffer += read_length;
347                 length -= read_length;
348         }
349
350         return status;
351 }
352
353 static int read_ram(struct usb_device *dev, int start_address,
354                                                 int length, __u8 *buffer)
355 {
356         return read_download_mem(dev, start_address, length,
357                                         DTK_ADDR_SPACE_XDATA, buffer);
358 }
359
360 /* Read edgeport memory to a given block */
361 static int read_boot_mem(struct edgeport_serial *serial,
362                                 int start_address, int length, __u8 *buffer)
363 {
364         int status = 0;
365         int i;
366
367         for (i = 0; i < length; i++) {
368                 status = ti_vread_sync(serial->serial->dev,
369                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
370                                 (__u16)(start_address+i), &buffer[i], 0x01);
371                 if (status) {
372                         dbg("%s - ERROR %x", __func__, status);
373                         return status;
374                 }
375         }
376
377         dbg("%s - start_address = %x, length = %d",
378                                         __func__, start_address, length);
379         usb_serial_debug_data(debug, &serial->serial->dev->dev,
380                                         __func__, length, buffer);
381
382         serial->TiReadI2C = 1;
383
384         return status;
385 }
386
387 /* Write given block to TI EPROM memory */
388 static int write_boot_mem(struct edgeport_serial *serial,
389                                 int start_address, int length, __u8 *buffer)
390 {
391         int status = 0;
392         int i;
393         u8 *temp;
394
395         /* Must do a read before write */
396         if (!serial->TiReadI2C) {
397                 temp = kmalloc(1, GFP_KERNEL);
398                 if (!temp) {
399                         dev_err(&serial->serial->dev->dev,
400                                         "%s - out of memory\n", __func__);
401                         return -ENOMEM;
402                 }
403                 status = read_boot_mem(serial, 0, 1, temp);
404                 kfree(temp);
405                 if (status)
406                         return status;
407         }
408
409         for (i = 0; i < length; ++i) {
410                 status = ti_vsend_sync(serial->serial->dev,
411                                 UMPC_MEMORY_WRITE, buffer[i],
412                                 (__u16)(i + start_address), NULL, 0);
413                 if (status)
414                         return status;
415         }
416
417         dbg("%s - start_sddr = %x, length = %d",
418                                         __func__, start_address, length);
419         usb_serial_debug_data(debug, &serial->serial->dev->dev,
420                                         __func__, length, buffer);
421
422         return status;
423 }
424
425
426 /* Write edgeport I2C memory to TI chip */
427 static int write_i2c_mem(struct edgeport_serial *serial,
428                 int start_address, int length, __u8 address_type, __u8 *buffer)
429 {
430         int status = 0;
431         int write_length;
432         __be16 be_start_address;
433
434         /* We can only send a maximum of 1 aligned byte page at a time */
435
436         /* calulate the number of bytes left in the first page */
437         write_length = EPROM_PAGE_SIZE -
438                                 (start_address & (EPROM_PAGE_SIZE - 1));
439
440         if (write_length > length)
441                 write_length = length;
442
443         dbg("%s - BytesInFirstPage Addr = %x, length = %d",
444                                         __func__, start_address, write_length);
445         usb_serial_debug_data(debug, &serial->serial->dev->dev,
446                                                 __func__, write_length, buffer);
447
448         /* Write first page */
449         be_start_address = cpu_to_be16(start_address);
450         status = ti_vsend_sync(serial->serial->dev,
451                                 UMPC_MEMORY_WRITE, (__u16)address_type,
452                                 (__force __u16)be_start_address,
453                                 buffer, write_length);
454         if (status) {
455                 dbg("%s - ERROR %d", __func__, status);
456                 return status;
457         }
458
459         length          -= write_length;
460         start_address   += write_length;
461         buffer          += write_length;
462
463         /* We should be aligned now -- can write
464            max page size bytes at a time */
465         while (length) {
466                 if (length > EPROM_PAGE_SIZE)
467                         write_length = EPROM_PAGE_SIZE;
468                 else
469                         write_length = length;
470
471                 dbg("%s - Page Write Addr = %x, length = %d",
472                                         __func__, start_address, write_length);
473                 usb_serial_debug_data(debug, &serial->serial->dev->dev,
474                                         __func__, write_length, buffer);
475
476                 /* Write next page */
477                 be_start_address = cpu_to_be16(start_address);
478                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
479                                 (__u16)address_type,
480                                 (__force __u16)be_start_address,
481                                 buffer, write_length);
482                 if (status) {
483                         dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
484                                         __func__, status);
485                         return status;
486                 }
487
488                 length          -= write_length;
489                 start_address   += write_length;
490                 buffer          += write_length;
491         }
492         return status;
493 }
494
495 /* Examine the UMP DMA registers and LSR
496  *
497  * Check the MSBit of the X and Y DMA byte count registers.
498  * A zero in this bit indicates that the TX DMA buffers are empty
499  * then check the TX Empty bit in the UART.
500  */
501 static int tx_active(struct edgeport_port *port)
502 {
503         int status;
504         struct out_endpoint_desc_block *oedb;
505         __u8 *lsr;
506         int bytes_left = 0;
507
508         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
509         if (!oedb) {
510                 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
511                 return -ENOMEM;
512         }
513
514         lsr = kmalloc(1, GFP_KERNEL);   /* Sigh, that's right, just one byte,
515                                            as not all platforms can do DMA
516                                            from stack */
517         if (!lsr) {
518                 kfree(oedb);
519                 return -ENOMEM;
520         }
521         /* Read the DMA Count Registers */
522         status = read_ram(port->port->serial->dev, port->dma_address,
523                                                 sizeof(*oedb), (void *)oedb);
524         if (status)
525                 goto exit_is_tx_active;
526
527         dbg("%s - XByteCount    0x%X", __func__, oedb->XByteCount);
528
529         /* and the LSR */
530         status = read_ram(port->port->serial->dev,
531                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
532
533         if (status)
534                 goto exit_is_tx_active;
535         dbg("%s - LSR = 0x%X", __func__, *lsr);
536
537         /* If either buffer has data or we are transmitting then return TRUE */
538         if ((oedb->XByteCount & 0x80) != 0)
539                 bytes_left += 64;
540
541         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
542                 bytes_left += 1;
543
544         /* We return Not Active if we get any kind of error */
545 exit_is_tx_active:
546         dbg("%s - return %d", __func__, bytes_left);
547
548         kfree(lsr);
549         kfree(oedb);
550         return bytes_left;
551 }
552
553 static void chase_port(struct edgeport_port *port, unsigned long timeout,
554                                                                 int flush)
555 {
556         int baud_rate;
557         struct tty_struct *tty = tty_port_tty_get(&port->port->port);
558         wait_queue_t wait;
559         unsigned long flags;
560
561         if (!timeout)
562                 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
563
564         /* wait for data to drain from the buffer */
565         spin_lock_irqsave(&port->ep_lock, flags);
566         init_waitqueue_entry(&wait, current);
567         add_wait_queue(&tty->write_wait, &wait);
568         for (;;) {
569                 set_current_state(TASK_INTERRUPTIBLE);
570                 if (kfifo_len(&port->write_fifo) == 0
571                 || timeout == 0 || signal_pending(current)
572                 || !usb_get_intfdata(port->port->serial->interface))
573                         /* disconnect */
574                         break;
575                 spin_unlock_irqrestore(&port->ep_lock, flags);
576                 timeout = schedule_timeout(timeout);
577                 spin_lock_irqsave(&port->ep_lock, flags);
578         }
579         set_current_state(TASK_RUNNING);
580         remove_wait_queue(&tty->write_wait, &wait);
581         if (flush)
582                 kfifo_reset_out(&port->write_fifo);
583         spin_unlock_irqrestore(&port->ep_lock, flags);
584         tty_kref_put(tty);
585
586         /* wait for data to drain from the device */
587         timeout += jiffies;
588         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
589         && usb_get_intfdata(port->port->serial->interface)) {
590                 /* not disconnected */
591                 if (!tx_active(port))
592                         break;
593                 msleep(10);
594         }
595
596         /* disconnected */
597         if (!usb_get_intfdata(port->port->serial->interface))
598                 return;
599
600         /* wait one more character time, based on baud rate */
601         /* (tx_active doesn't seem to wait for the last byte) */
602         baud_rate = port->baud_rate;
603         if (baud_rate == 0)
604                 baud_rate = 50;
605         msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
606 }
607
608 static int choose_config(struct usb_device *dev)
609 {
610         /*
611          * There may be multiple configurations on this device, in which case
612          * we would need to read and parse all of them to find out which one
613          * we want. However, we just support one config at this point,
614          * configuration # 1, which is Config Descriptor 0.
615          */
616
617         dbg("%s - Number of Interfaces = %d",
618                                 __func__, dev->config->desc.bNumInterfaces);
619         dbg("%s - MAX Power            = %d",
620                                 __func__, dev->config->desc.bMaxPower * 2);
621
622         if (dev->config->desc.bNumInterfaces != 1) {
623                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
624                                                                 __func__);
625                 return -ENODEV;
626         }
627
628         return 0;
629 }
630
631 static int read_rom(struct edgeport_serial *serial,
632                                 int start_address, int length, __u8 *buffer)
633 {
634         int status;
635
636         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
637                 status = read_download_mem(serial->serial->dev,
638                                                start_address,
639                                                length,
640                                                serial->TI_I2C_Type,
641                                                buffer);
642         } else {
643                 status = read_boot_mem(serial, start_address, length,
644                                                                 buffer);
645         }
646         return status;
647 }
648
649 static int write_rom(struct edgeport_serial *serial, int start_address,
650                                                 int length, __u8 *buffer)
651 {
652         if (serial->product_info.TiMode == TI_MODE_BOOT)
653                 return write_boot_mem(serial, start_address, length,
654                                                                 buffer);
655
656         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
657                 return write_i2c_mem(serial, start_address, length,
658                                                 serial->TI_I2C_Type, buffer);
659         return -EINVAL;
660 }
661
662
663
664 /* Read a descriptor header from I2C based on type */
665 static int get_descriptor_addr(struct edgeport_serial *serial,
666                                 int desc_type, struct ti_i2c_desc *rom_desc)
667 {
668         int start_address;
669         int status;
670
671         /* Search for requested descriptor in I2C */
672         start_address = 2;
673         do {
674                 status = read_rom(serial,
675                                    start_address,
676                                    sizeof(struct ti_i2c_desc),
677                                    (__u8 *)rom_desc);
678                 if (status)
679                         return 0;
680
681                 if (rom_desc->Type == desc_type)
682                         return start_address;
683
684                 start_address = start_address + sizeof(struct ti_i2c_desc)
685                                                         + rom_desc->Size;
686
687         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
688
689         return 0;
690 }
691
692 /* Validate descriptor checksum */
693 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
694 {
695         __u16 i;
696         __u8 cs = 0;
697
698         for (i = 0; i < rom_desc->Size; i++)
699                 cs = (__u8)(cs + buffer[i]);
700
701         if (cs != rom_desc->CheckSum) {
702                 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
703                 return -EINVAL;
704         }
705         return 0;
706 }
707
708 /* Make sure that the I2C image is good */
709 static int check_i2c_image(struct edgeport_serial *serial)
710 {
711         struct device *dev = &serial->serial->dev->dev;
712         int status = 0;
713         struct ti_i2c_desc *rom_desc;
714         int start_address = 2;
715         __u8 *buffer;
716         __u16 ttype;
717
718         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
719         if (!rom_desc) {
720                 dev_err(dev, "%s - out of memory\n", __func__);
721                 return -ENOMEM;
722         }
723         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
724         if (!buffer) {
725                 dev_err(dev, "%s - out of memory when allocating buffer\n",
726                                                                 __func__);
727                 kfree(rom_desc);
728                 return -ENOMEM;
729         }
730
731         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
732         status = read_rom(serial, 0, 1, buffer);
733         if (status)
734                 goto out;
735
736         if (*buffer != UMP5152 && *buffer != UMP3410) {
737                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
738                 status = -ENODEV;
739                 goto out;
740         }
741
742         do {
743                 /* Validate the I2C */
744                 status = read_rom(serial,
745                                 start_address,
746                                 sizeof(struct ti_i2c_desc),
747                                 (__u8 *)rom_desc);
748                 if (status)
749                         break;
750
751                 if ((start_address + sizeof(struct ti_i2c_desc) +
752                                         rom_desc->Size) > TI_MAX_I2C_SIZE) {
753                         status = -ENODEV;
754                         dbg("%s - structure too big, erroring out.", __func__);
755                         break;
756                 }
757
758                 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
759
760                 /* Skip type 2 record */
761                 ttype = rom_desc->Type & 0x0f;
762                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
763                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
764                         /* Read the descriptor data */
765                         status = read_rom(serial, start_address +
766                                                 sizeof(struct ti_i2c_desc),
767                                                 rom_desc->Size, buffer);
768                         if (status)
769                                 break;
770
771                         status = valid_csum(rom_desc, buffer);
772                         if (status)
773                                 break;
774                 }
775                 start_address = start_address + sizeof(struct ti_i2c_desc) +
776                                                                 rom_desc->Size;
777
778         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
779                                 (start_address < TI_MAX_I2C_SIZE));
780
781         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
782                                 (start_address > TI_MAX_I2C_SIZE))
783                 status = -ENODEV;
784
785 out:
786         kfree(buffer);
787         kfree(rom_desc);
788         return status;
789 }
790
791 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
792 {
793         int status;
794         int start_address;
795         struct ti_i2c_desc *rom_desc;
796         struct edge_ti_manuf_descriptor *desc;
797
798         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
799         if (!rom_desc) {
800                 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
801                                                                 __func__);
802                 return -ENOMEM;
803         }
804         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
805                                                                 rom_desc);
806
807         if (!start_address) {
808                 dbg("%s - Edge Descriptor not found in I2C", __func__);
809                 status = -ENODEV;
810                 goto exit;
811         }
812
813         /* Read the descriptor data */
814         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
815                                                 rom_desc->Size, buffer);
816         if (status)
817                 goto exit;
818
819         status = valid_csum(rom_desc, buffer);
820
821         desc = (struct edge_ti_manuf_descriptor *)buffer;
822         dbg("%s - IonConfig      0x%x", __func__, desc->IonConfig);
823         dbg("%s - Version          %d", __func__, desc->Version);
824         dbg("%s - Cpu/Board      0x%x", __func__, desc->CpuRev_BoardRev);
825         dbg("%s - NumPorts         %d", __func__, desc->NumPorts);
826         dbg("%s - NumVirtualPorts  %d", __func__, desc->NumVirtualPorts);
827         dbg("%s - TotalPorts       %d", __func__, desc->TotalPorts);
828
829 exit:
830         kfree(rom_desc);
831         return status;
832 }
833
834 /* Build firmware header used for firmware update */
835 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
836 {
837         __u8 *buffer;
838         int buffer_size;
839         int i;
840         int err;
841         __u8 cs = 0;
842         struct ti_i2c_desc *i2c_header;
843         struct ti_i2c_image_header *img_header;
844         struct ti_i2c_firmware_rec *firmware_rec;
845         const struct firmware *fw;
846         const char *fw_name = "edgeport/down3.bin";
847
848         /* In order to update the I2C firmware we must change the type 2 record
849          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
850          * Then while in boot mode, the driver will download the latest
851          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
852          * device comes back up in download mode the driver will cause the new
853          * firmware to be copied from the UMP Ram to I2C and the firmware will
854          * update the record type from 0xf2 to 0x02.
855          */
856
857         /* Allocate a 15.5k buffer + 2 bytes for version number
858          * (Firmware Record) */
859         buffer_size = (((1024 * 16) - 512 ) +
860                         sizeof(struct ti_i2c_firmware_rec));
861
862         buffer = kmalloc(buffer_size, GFP_KERNEL);
863         if (!buffer) {
864                 dev_err(dev, "%s - out of memory\n", __func__);
865                 return -ENOMEM;
866         }
867
868         // Set entire image of 0xffs
869         memset(buffer, 0xff, buffer_size);
870
871         err = request_firmware(&fw, fw_name, dev);
872         if (err) {
873                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
874                        fw_name, err);
875                 kfree(buffer);
876                 return err;
877         }
878
879         /* Save Download Version Number */
880         OperationalMajorVersion = fw->data[0];
881         OperationalMinorVersion = fw->data[1];
882         OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
883
884         /* Copy version number into firmware record */
885         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
886
887         firmware_rec->Ver_Major = OperationalMajorVersion;
888         firmware_rec->Ver_Minor = OperationalMinorVersion;
889
890         /* Pointer to fw_down memory image */
891         img_header = (struct ti_i2c_image_header *)&fw->data[4];
892
893         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
894                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
895                 le16_to_cpu(img_header->Length));
896
897         release_firmware(fw);
898
899         for (i=0; i < buffer_size; i++) {
900                 cs = (__u8)(cs + buffer[i]);
901         }
902
903         kfree(buffer);
904
905         /* Build new header */
906         i2c_header =  (struct ti_i2c_desc *)header;
907         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
908
909         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
910         i2c_header->Size        = (__u16)buffer_size;
911         i2c_header->CheckSum    = cs;
912         firmware_rec->Ver_Major = OperationalMajorVersion;
913         firmware_rec->Ver_Minor = OperationalMinorVersion;
914
915         return 0;
916 }
917
918 /* Try to figure out what type of I2c we have */
919 static int i2c_type_bootmode(struct edgeport_serial *serial)
920 {
921         int status;
922         u8 *data;
923
924         data = kmalloc(1, GFP_KERNEL);
925         if (!data) {
926                 dev_err(&serial->serial->dev->dev,
927                                 "%s - out of memory\n", __func__);
928                 return -ENOMEM;
929         }
930
931         /* Try to read type 2 */
932         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
933                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
934         if (status)
935                 dbg("%s - read 2 status error = %d", __func__, status);
936         else
937                 dbg("%s - read 2 data = 0x%x", __func__, *data);
938         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
939                 dbg("%s - ROM_TYPE_II", __func__);
940                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
941                 goto out;
942         }
943
944         /* Try to read type 3 */
945         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
946                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
947         if (status)
948                 dbg("%s - read 3 status error = %d", __func__, status);
949         else
950                 dbg("%s - read 2 data = 0x%x", __func__, *data);
951         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
952                 dbg("%s - ROM_TYPE_III", __func__);
953                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
954                 goto out;
955         }
956
957         dbg("%s - Unknown", __func__);
958         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
959         status = -ENODEV;
960 out:
961         kfree(data);
962         return status;
963 }
964
965 static int bulk_xfer(struct usb_serial *serial, void *buffer,
966                                                 int length, int *num_sent)
967 {
968         int status;
969
970         status = usb_bulk_msg(serial->dev,
971                         usb_sndbulkpipe(serial->dev,
972                                 serial->port[0]->bulk_out_endpointAddress),
973                         buffer, length, num_sent, 1000);
974         return status;
975 }
976
977 /* Download given firmware image to the device (IN BOOT MODE) */
978 static int download_code(struct edgeport_serial *serial, __u8 *image,
979                                                         int image_length)
980 {
981         int status = 0;
982         int pos;
983         int transfer;
984         int done;
985
986         /* Transfer firmware image */
987         for (pos = 0; pos < image_length; ) {
988                 /* Read the next buffer from file */
989                 transfer = image_length - pos;
990                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
991                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
992
993                 /* Transfer data */
994                 status = bulk_xfer(serial->serial, &image[pos],
995                                                         transfer, &done);
996                 if (status)
997                         break;
998                 /* Advance buffer pointer */
999                 pos += done;
1000         }
1001
1002         return status;
1003 }
1004
1005 /* FIXME!!! */
1006 static int config_boot_dev(struct usb_device *dev)
1007 {
1008         return 0;
1009 }
1010
1011 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1012 {
1013         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1014 }
1015
1016 /**
1017  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1018  *
1019  * This routine downloads the main operating code into the TI5052, using the
1020  * boot code already burned into E2PROM or ROM.
1021  */
1022 static int download_fw(struct edgeport_serial *serial)
1023 {
1024         struct device *dev = &serial->serial->dev->dev;
1025         int status = 0;
1026         int start_address;
1027         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1028         struct usb_interface_descriptor *interface;
1029         int download_cur_ver;
1030         int download_new_ver;
1031
1032         /* This routine is entered by both the BOOT mode and the Download mode
1033          * We can determine which code is running by the reading the config
1034          * descriptor and if we have only one bulk pipe it is in boot mode
1035          */
1036         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1037
1038         /* Default to type 2 i2c */
1039         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1040
1041         status = choose_config(serial->serial->dev);
1042         if (status)
1043                 return status;
1044
1045         interface = &serial->serial->interface->cur_altsetting->desc;
1046         if (!interface) {
1047                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1048                 return -ENODEV;
1049         }
1050
1051         /*
1052          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1053          * if we have more than one endpoint we are definitely in download
1054          * mode
1055          */
1056         if (interface->bNumEndpoints > 1)
1057                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1058         else
1059                 /* Otherwise we will remain in configuring mode */
1060                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1061
1062         /********************************************************************/
1063         /* Download Mode */
1064         /********************************************************************/
1065         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1066                 struct ti_i2c_desc *rom_desc;
1067
1068                 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1069
1070                 status = check_i2c_image(serial);
1071                 if (status) {
1072                         dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1073                         return status;
1074                 }
1075
1076                 /* Validate Hardware version number
1077                  * Read Manufacturing Descriptor from TI Based Edgeport
1078                  */
1079                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1080                 if (!ti_manuf_desc) {
1081                         dev_err(dev, "%s - out of memory.\n", __func__);
1082                         return -ENOMEM;
1083                 }
1084                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1085                 if (status) {
1086                         kfree(ti_manuf_desc);
1087                         return status;
1088                 }
1089
1090                 /* Check version number of ION descriptor */
1091                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1092                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1093                                 __func__, ti_cpu_rev(ti_manuf_desc));
1094                         kfree(ti_manuf_desc);
1095                         return -EINVAL;
1096                 }
1097
1098                 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1099                 if (!rom_desc) {
1100                         dev_err(dev, "%s - out of memory.\n", __func__);
1101                         kfree(ti_manuf_desc);
1102                         return -ENOMEM;
1103                 }
1104
1105                 /* Search for type 2 record (firmware record) */
1106                 start_address = get_descriptor_addr(serial,
1107                                 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1108                 if (start_address != 0) {
1109                         struct ti_i2c_firmware_rec *firmware_version;
1110                         u8 *record;
1111
1112                         dbg("%s - Found Type FIRMWARE (Type 2) record",
1113                                                                 __func__);
1114
1115                         firmware_version = kmalloc(sizeof(*firmware_version),
1116                                                                 GFP_KERNEL);
1117                         if (!firmware_version) {
1118                                 dev_err(dev, "%s - out of memory.\n", __func__);
1119                                 kfree(rom_desc);
1120                                 kfree(ti_manuf_desc);
1121                                 return -ENOMEM;
1122                         }
1123
1124                         /* Validate version number
1125                          * Read the descriptor data
1126                          */
1127                         status = read_rom(serial, start_address +
1128                                         sizeof(struct ti_i2c_desc),
1129                                         sizeof(struct ti_i2c_firmware_rec),
1130                                         (__u8 *)firmware_version);
1131                         if (status) {
1132                                 kfree(firmware_version);
1133                                 kfree(rom_desc);
1134                                 kfree(ti_manuf_desc);
1135                                 return status;
1136                         }
1137
1138                         /* Check version number of download with current
1139                            version in I2c */
1140                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1141                                            (firmware_version->Ver_Minor);
1142                         download_new_ver = (OperationalMajorVersion << 8) +
1143                                            (OperationalMinorVersion);
1144
1145                         dbg("%s - >> FW Versions Device %d.%d  Driver %d.%d",
1146                             __func__,
1147                             firmware_version->Ver_Major,
1148                             firmware_version->Ver_Minor,
1149                             OperationalMajorVersion,
1150                             OperationalMinorVersion);
1151
1152                         /* Check if we have an old version in the I2C and
1153                            update if necessary */
1154                         if (download_cur_ver < download_new_ver) {
1155                                 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1156                                     __func__,
1157                                     firmware_version->Ver_Major,
1158                                     firmware_version->Ver_Minor,
1159                                     OperationalMajorVersion,
1160                                     OperationalMinorVersion);
1161
1162                                 record = kmalloc(1, GFP_KERNEL);
1163                                 if (!record) {
1164                                         dev_err(dev, "%s - out of memory.\n",
1165                                                         __func__);
1166                                         kfree(firmware_version);
1167                                         kfree(rom_desc);
1168                                         kfree(ti_manuf_desc);
1169                                         return -ENOMEM;
1170                                 }
1171                                 /* In order to update the I2C firmware we must
1172                                  * change the type 2 record to type 0xF2. This
1173                                  * will force the UMP to come up in Boot Mode.
1174                                  * Then while in boot mode, the driver will
1175                                  * download the latest firmware (padded to
1176                                  * 15.5k) into the UMP ram. Finally when the
1177                                  * device comes back up in download mode the
1178                                  * driver will cause the new firmware to be
1179                                  * copied from the UMP Ram to I2C and the
1180                                  * firmware will update the record type from
1181                                  * 0xf2 to 0x02.
1182                                  */
1183                                 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1184
1185                                 /* Change the I2C Firmware record type to
1186                                    0xf2 to trigger an update */
1187                                 status = write_rom(serial, start_address,
1188                                                 sizeof(*record), record);
1189                                 if (status) {
1190                                         kfree(record);
1191                                         kfree(firmware_version);
1192                                         kfree(rom_desc);
1193                                         kfree(ti_manuf_desc);
1194                                         return status;
1195                                 }
1196
1197                                 /* verify the write -- must do this in order
1198                                  * for write to complete before we do the
1199                                  * hardware reset
1200                                  */
1201                                 status = read_rom(serial,
1202                                                         start_address,
1203                                                         sizeof(*record),
1204                                                         record);
1205                                 if (status) {
1206                                         kfree(record);
1207                                         kfree(firmware_version);
1208                                         kfree(rom_desc);
1209                                         kfree(ti_manuf_desc);
1210                                         return status;
1211                                 }
1212
1213                                 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1214                                         dev_err(dev,
1215                                                 "%s - error resetting device\n",
1216                                                 __func__);
1217                                         kfree(record);
1218                                         kfree(firmware_version);
1219                                         kfree(rom_desc);
1220                                         kfree(ti_manuf_desc);
1221                                         return -ENODEV;
1222                                 }
1223
1224                                 dbg("%s - HARDWARE RESET", __func__);
1225
1226                                 /* Reset UMP -- Back to BOOT MODE */
1227                                 status = ti_vsend_sync(serial->serial->dev,
1228                                                 UMPC_HARDWARE_RESET,
1229                                                 0, 0, NULL, 0);
1230
1231                                 dbg("%s - HARDWARE RESET return %d",
1232                                                 __func__, status);
1233
1234                                 /* return an error on purpose. */
1235                                 kfree(record);
1236                                 kfree(firmware_version);
1237                                 kfree(rom_desc);
1238                                 kfree(ti_manuf_desc);
1239                                 return -ENODEV;
1240                         }
1241                         kfree(firmware_version);
1242                 }
1243                 /* Search for type 0xF2 record (firmware blank record) */
1244                 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1245 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1246                                         sizeof(struct ti_i2c_firmware_rec))
1247                         __u8 *header;
1248                         __u8 *vheader;
1249
1250                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1251                         if (!header) {
1252                                 dev_err(dev, "%s - out of memory.\n", __func__);
1253                                 kfree(rom_desc);
1254                                 kfree(ti_manuf_desc);
1255                                 return -ENOMEM;
1256                         }
1257
1258                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1259                         if (!vheader) {
1260                                 dev_err(dev, "%s - out of memory.\n", __func__);
1261                                 kfree(header);
1262                                 kfree(rom_desc);
1263                                 kfree(ti_manuf_desc);
1264                                 return -ENOMEM;
1265                         }
1266
1267                         dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1268                                                                 __func__);
1269
1270                         /*
1271                          * In order to update the I2C firmware we must change
1272                          * the type 2 record to type 0xF2. This will force the
1273                          * UMP to come up in Boot Mode.  Then while in boot
1274                          * mode, the driver will download the latest firmware
1275                          * (padded to 15.5k) into the UMP ram. Finally when the
1276                          * device comes back up in download mode the driver
1277                          * will cause the new firmware to be copied from the
1278                          * UMP Ram to I2C and the firmware will update the
1279                          * record type from 0xf2 to 0x02.
1280                          */
1281                         status = build_i2c_fw_hdr(header, dev);
1282                         if (status) {
1283                                 kfree(vheader);
1284                                 kfree(header);
1285                                 kfree(rom_desc);
1286                                 kfree(ti_manuf_desc);
1287                                 return -EINVAL;
1288                         }
1289
1290                         /* Update I2C with type 0xf2 record with correct
1291                            size and checksum */
1292                         status = write_rom(serial,
1293                                                 start_address,
1294                                                 HEADER_SIZE,
1295                                                 header);
1296                         if (status) {
1297                                 kfree(vheader);
1298                                 kfree(header);
1299                                 kfree(rom_desc);
1300                                 kfree(ti_manuf_desc);
1301                                 return -EINVAL;
1302                         }
1303
1304                         /* verify the write -- must do this in order for
1305                            write to complete before we do the hardware reset */
1306                         status = read_rom(serial, start_address,
1307                                                         HEADER_SIZE, vheader);
1308
1309                         if (status) {
1310                                 dbg("%s - can't read header back", __func__);
1311                                 kfree(vheader);
1312                                 kfree(header);
1313                                 kfree(rom_desc);
1314                                 kfree(ti_manuf_desc);
1315                                 return status;
1316                         }
1317                         if (memcmp(vheader, header, HEADER_SIZE)) {
1318                                 dbg("%s - write download record failed",
1319                                         __func__);
1320                                 kfree(vheader);
1321                                 kfree(header);
1322                                 kfree(rom_desc);
1323                                 kfree(ti_manuf_desc);
1324                                 return -EINVAL;
1325                         }
1326
1327                         kfree(vheader);
1328                         kfree(header);
1329
1330                         dbg("%s - Start firmware update", __func__);
1331
1332                         /* Tell firmware to copy download image into I2C */
1333                         status = ti_vsend_sync(serial->serial->dev,
1334                                         UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1335
1336                         dbg("%s - Update complete 0x%x", __func__, status);
1337                         if (status) {
1338                                 dev_err(dev,
1339                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1340                                                                 __func__);
1341                                 kfree(rom_desc);
1342                                 kfree(ti_manuf_desc);
1343                                 return status;
1344                         }
1345                 }
1346
1347                 // The device is running the download code
1348                 kfree(rom_desc);
1349                 kfree(ti_manuf_desc);
1350                 return 0;
1351         }
1352
1353         /********************************************************************/
1354         /* Boot Mode */
1355         /********************************************************************/
1356         dbg("%s - RUNNING IN BOOT MODE", __func__);
1357
1358         /* Configure the TI device so we can use the BULK pipes for download */
1359         status = config_boot_dev(serial->serial->dev);
1360         if (status)
1361                 return status;
1362
1363         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1364                                                         != USB_VENDOR_ID_ION) {
1365                 dbg("%s - VID = 0x%x", __func__,
1366                      le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1367                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1368                 goto stayinbootmode;
1369         }
1370
1371         /* We have an ION device (I2c Must be programmed)
1372            Determine I2C image type */
1373         if (i2c_type_bootmode(serial))
1374                 goto stayinbootmode;
1375
1376         /* Check for ION Vendor ID and that the I2C is valid */
1377         if (!check_i2c_image(serial)) {
1378                 struct ti_i2c_image_header *header;
1379                 int i;
1380                 __u8 cs = 0;
1381                 __u8 *buffer;
1382                 int buffer_size;
1383                 int err;
1384                 const struct firmware *fw;
1385                 const char *fw_name = "edgeport/down3.bin";
1386
1387                 /* Validate Hardware version number
1388                  * Read Manufacturing Descriptor from TI Based Edgeport
1389                  */
1390                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1391                 if (!ti_manuf_desc) {
1392                         dev_err(dev, "%s - out of memory.\n", __func__);
1393                         return -ENOMEM;
1394                 }
1395                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1396                 if (status) {
1397                         kfree(ti_manuf_desc);
1398                         goto stayinbootmode;
1399                 }
1400
1401                 /* Check for version 2 */
1402                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1403                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1404                                         __func__, ti_cpu_rev(ti_manuf_desc));
1405                         kfree(ti_manuf_desc);
1406                         goto stayinbootmode;
1407                 }
1408
1409                 kfree(ti_manuf_desc);
1410
1411                 /*
1412                  * In order to update the I2C firmware we must change the type
1413                  * 2 record to type 0xF2. This will force the UMP to come up
1414                  * in Boot Mode.  Then while in boot mode, the driver will
1415                  * download the latest firmware (padded to 15.5k) into the
1416                  * UMP ram. Finally when the device comes back up in download
1417                  * mode the driver will cause the new firmware to be copied
1418                  * from the UMP Ram to I2C and the firmware will update the
1419                  * record type from 0xf2 to 0x02.
1420                  *
1421                  * Do we really have to copy the whole firmware image,
1422                  * or could we do this in place!
1423                  */
1424
1425                 /* Allocate a 15.5k buffer + 3 byte header */
1426                 buffer_size = (((1024 * 16) - 512) +
1427                                         sizeof(struct ti_i2c_image_header));
1428                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1429                 if (!buffer) {
1430                         dev_err(dev, "%s - out of memory\n", __func__);
1431                         return -ENOMEM;
1432                 }
1433
1434                 /* Initialize the buffer to 0xff (pad the buffer) */
1435                 memset(buffer, 0xff, buffer_size);
1436
1437                 err = request_firmware(&fw, fw_name, dev);
1438                 if (err) {
1439                         printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1440                                fw_name, err);
1441                         kfree(buffer);
1442                         return err;
1443                 }
1444                 memcpy(buffer, &fw->data[4], fw->size - 4);
1445                 release_firmware(fw);
1446
1447                 for (i = sizeof(struct ti_i2c_image_header);
1448                                 i < buffer_size; i++) {
1449                         cs = (__u8)(cs + buffer[i]);
1450                 }
1451
1452                 header = (struct ti_i2c_image_header *)buffer;
1453
1454                 /* update length and checksum after padding */
1455                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1456                                         sizeof(struct ti_i2c_image_header)));
1457                 header->CheckSum = cs;
1458
1459                 /* Download the operational code  */
1460                 dbg("%s - Downloading operational code image (TI UMP)",
1461                                                                 __func__);
1462                 status = download_code(serial, buffer, buffer_size);
1463
1464                 kfree(buffer);
1465
1466                 if (status) {
1467                         dbg("%s - Error downloading operational code image",
1468                                                                 __func__);
1469                         return status;
1470                 }
1471
1472                 /* Device will reboot */
1473                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1474
1475                 dbg("%s - Download successful -- Device rebooting...",
1476                                                                 __func__);
1477
1478                 /* return an error on purpose */
1479                 return -ENODEV;
1480         }
1481
1482 stayinbootmode:
1483         /* Eprom is invalid or blank stay in boot mode */
1484         dbg("%s - STAYING IN BOOT MODE", __func__);
1485         serial->product_info.TiMode = TI_MODE_BOOT;
1486
1487         return 0;
1488 }
1489
1490
1491 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1492 {
1493         int port_number = port->port->number - port->port->serial->minor;
1494         on = !!on;      /* 1 or 0 not bitmask */
1495         return send_cmd(port->port->serial->dev,
1496                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1497                         on, NULL, 0);
1498 }
1499
1500
1501 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1502 {
1503         int status = 0;
1504
1505         dbg("%s - %x", __func__, mcr);
1506
1507         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1508         if (status)
1509                 return status;
1510         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1511         if (status)
1512                 return status;
1513         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1514 }
1515
1516 /* Convert TI LSR to standard UART flags */
1517 static __u8 map_line_status(__u8 ti_lsr)
1518 {
1519         __u8 lsr = 0;
1520
1521 #define MAP_FLAG(flagUmp, flagUart)    \
1522         if (ti_lsr & flagUmp) \
1523                 lsr |= flagUart;
1524
1525         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1526         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1527         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1528         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1529         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1530         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1531
1532 #undef MAP_FLAG
1533
1534         return lsr;
1535 }
1536
1537 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1538 {
1539         struct async_icount *icount;
1540         struct tty_struct *tty;
1541
1542         dbg("%s - %02x", __func__, msr);
1543
1544         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1545                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1546                 icount = &edge_port->icount;
1547
1548                 /* update input line counters */
1549                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1550                         icount->cts++;
1551                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1552                         icount->dsr++;
1553                 if (msr & EDGEPORT_MSR_DELTA_CD)
1554                         icount->dcd++;
1555                 if (msr & EDGEPORT_MSR_DELTA_RI)
1556                         icount->rng++;
1557                 wake_up_interruptible(&edge_port->delta_msr_wait);
1558         }
1559
1560         /* Save the new modem status */
1561         edge_port->shadow_msr = msr & 0xf0;
1562
1563         tty = tty_port_tty_get(&edge_port->port->port);
1564         /* handle CTS flow control */
1565         if (tty && C_CRTSCTS(tty)) {
1566                 if (msr & EDGEPORT_MSR_CTS) {
1567                         tty->hw_stopped = 0;
1568                         tty_wakeup(tty);
1569                 } else {
1570                         tty->hw_stopped = 1;
1571                 }
1572         }
1573         tty_kref_put(tty);
1574 }
1575
1576 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1577                                                         __u8 lsr, __u8 data)
1578 {
1579         struct async_icount *icount;
1580         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1581                                                 LSR_FRM_ERR | LSR_BREAK));
1582         struct tty_struct *tty;
1583
1584         dbg("%s - %02x", __func__, new_lsr);
1585
1586         edge_port->shadow_lsr = lsr;
1587
1588         if (new_lsr & LSR_BREAK)
1589                 /*
1590                  * Parity and Framing errors only count if they
1591                  * occur exclusive of a break being received.
1592                  */
1593                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1594
1595         /* Place LSR data byte into Rx buffer */
1596         if (lsr_data) {
1597                 tty = tty_port_tty_get(&edge_port->port->port);
1598                 if (tty) {
1599                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1600                         tty_kref_put(tty);
1601                 }
1602         }
1603
1604         /* update input line counters */
1605         icount = &edge_port->icount;
1606         if (new_lsr & LSR_BREAK)
1607                 icount->brk++;
1608         if (new_lsr & LSR_OVER_ERR)
1609                 icount->overrun++;
1610         if (new_lsr & LSR_PAR_ERR)
1611                 icount->parity++;
1612         if (new_lsr & LSR_FRM_ERR)
1613                 icount->frame++;
1614 }
1615
1616
1617 static void edge_interrupt_callback(struct urb *urb)
1618 {
1619         struct edgeport_serial *edge_serial = urb->context;
1620         struct usb_serial_port *port;
1621         struct edgeport_port *edge_port;
1622         unsigned char *data = urb->transfer_buffer;
1623         int length = urb->actual_length;
1624         int port_number;
1625         int function;
1626         int retval;
1627         __u8 lsr;
1628         __u8 msr;
1629         int status = urb->status;
1630
1631         dbg("%s", __func__);
1632
1633         switch (status) {
1634         case 0:
1635                 /* success */
1636                 break;
1637         case -ECONNRESET:
1638         case -ENOENT:
1639         case -ESHUTDOWN:
1640                 /* this urb is terminated, clean up */
1641                 dbg("%s - urb shutting down with status: %d",
1642                     __func__, status);
1643                 return;
1644         default:
1645                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1646                         "%d\n", __func__, status);
1647                 goto exit;
1648         }
1649
1650         if (!length) {
1651                 dbg("%s - no data in urb", __func__);
1652                 goto exit;
1653         }
1654
1655         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1656                                                 __func__, length, data);
1657
1658         if (length != 2) {
1659                 dbg("%s - expecting packet of size 2, got %d",
1660                                                         __func__, length);
1661                 goto exit;
1662         }
1663
1664         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1665         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1666         dbg("%s - port_number %d, function %d, info 0x%x",
1667              __func__, port_number, function, data[1]);
1668         port = edge_serial->serial->port[port_number];
1669         edge_port = usb_get_serial_port_data(port);
1670         if (!edge_port) {
1671                 dbg("%s - edge_port not found", __func__);
1672                 return;
1673         }
1674         switch (function) {
1675         case TIUMP_INTERRUPT_CODE_LSR:
1676                 lsr = map_line_status(data[1]);
1677                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1678                         /* Save the LSR event for bulk read
1679                            completion routine */
1680                         dbg("%s - LSR Event Port %u LSR Status = %02x",
1681                              __func__, port_number, lsr);
1682                         edge_port->lsr_event = 1;
1683                         edge_port->lsr_mask = lsr;
1684                 } else {
1685                         dbg("%s - ===== Port %d LSR Status = %02x ======",
1686                              __func__, port_number, lsr);
1687                         handle_new_lsr(edge_port, 0, lsr, 0);
1688                 }
1689                 break;
1690
1691         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1692                 /* Copy MSR from UMP */
1693                 msr = data[1];
1694                 dbg("%s - ===== Port %u MSR Status = %02x ======",
1695                      __func__, port_number, msr);
1696                 handle_new_msr(edge_port, msr);
1697                 break;
1698
1699         default:
1700                 dev_err(&urb->dev->dev,
1701                         "%s - Unknown Interrupt code from UMP %x\n",
1702                         __func__, data[1]);
1703                 break;
1704
1705         }
1706
1707 exit:
1708         retval = usb_submit_urb(urb, GFP_ATOMIC);
1709         if (retval)
1710                 dev_err(&urb->dev->dev,
1711                         "%s - usb_submit_urb failed with result %d\n",
1712                          __func__, retval);
1713 }
1714
1715 static void edge_bulk_in_callback(struct urb *urb)
1716 {
1717         struct edgeport_port *edge_port = urb->context;
1718         unsigned char *data = urb->transfer_buffer;
1719         struct tty_struct *tty;
1720         int retval = 0;
1721         int port_number;
1722         int status = urb->status;
1723
1724         dbg("%s", __func__);
1725
1726         switch (status) {
1727         case 0:
1728                 /* success */
1729                 break;
1730         case -ECONNRESET:
1731         case -ENOENT:
1732         case -ESHUTDOWN:
1733                 /* this urb is terminated, clean up */
1734                 dbg("%s - urb shutting down with status: %d",
1735                     __func__, status);
1736                 return;
1737         default:
1738                 dev_err(&urb->dev->dev,
1739                         "%s - nonzero read bulk status received: %d\n",
1740                              __func__, status);
1741         }
1742
1743         if (status == -EPIPE)
1744                 goto exit;
1745
1746         if (status) {
1747                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1748                 return;
1749         }
1750
1751         port_number = edge_port->port->number - edge_port->port->serial->minor;
1752
1753         if (edge_port->lsr_event) {
1754                 edge_port->lsr_event = 0;
1755                 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1756                      __func__, port_number, edge_port->lsr_mask, *data);
1757                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1758                 /* Adjust buffer length/pointer */
1759                 --urb->actual_length;
1760                 ++data;
1761         }
1762
1763         tty = tty_port_tty_get(&edge_port->port->port);
1764         if (tty && urb->actual_length) {
1765                 usb_serial_debug_data(debug, &edge_port->port->dev,
1766                                         __func__, urb->actual_length, data);
1767                 if (edge_port->close_pending)
1768                         dbg("%s - close pending, dropping data on the floor",
1769                                                                 __func__);
1770                 else
1771                         edge_tty_recv(&edge_port->port->dev, tty, data,
1772                                                         urb->actual_length);
1773                 edge_port->icount.rx += urb->actual_length;
1774         }
1775         tty_kref_put(tty);
1776
1777 exit:
1778         /* continue read unless stopped */
1779         spin_lock(&edge_port->ep_lock);
1780         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1781                 urb->dev = edge_port->port->serial->dev;
1782                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1783         } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1784                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1785         }
1786         spin_unlock(&edge_port->ep_lock);
1787         if (retval)
1788                 dev_err(&urb->dev->dev,
1789                         "%s - usb_submit_urb failed with result %d\n",
1790                          __func__, retval);
1791 }
1792
1793 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1794                                         unsigned char *data, int length)
1795 {
1796         int queued;
1797
1798         queued = tty_insert_flip_string(tty, data, length);
1799         if (queued < length)
1800                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1801                         __func__, length - queued);
1802         tty_flip_buffer_push(tty);
1803 }
1804
1805 static void edge_bulk_out_callback(struct urb *urb)
1806 {
1807         struct usb_serial_port *port = urb->context;
1808         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1809         int status = urb->status;
1810         struct tty_struct *tty;
1811
1812         dbg("%s - port %d", __func__, port->number);
1813
1814         edge_port->ep_write_urb_in_use = 0;
1815
1816         switch (status) {
1817         case 0:
1818                 /* success */
1819                 break;
1820         case -ECONNRESET:
1821         case -ENOENT:
1822         case -ESHUTDOWN:
1823                 /* this urb is terminated, clean up */
1824                 dbg("%s - urb shutting down with status: %d",
1825                     __func__, status);
1826                 return;
1827         default:
1828                 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1829                         "received: %d\n", __func__, status);
1830         }
1831
1832         /* send any buffered data */
1833         tty = tty_port_tty_get(&port->port);
1834         edge_send(tty);
1835         tty_kref_put(tty);
1836 }
1837
1838 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1839 {
1840         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1841         struct edgeport_serial *edge_serial;
1842         struct usb_device *dev;
1843         struct urb *urb;
1844         int port_number;
1845         int status;
1846         u16 open_settings;
1847         u8 transaction_timeout;
1848
1849         dbg("%s - port %d", __func__, port->number);
1850
1851         if (edge_port == NULL)
1852                 return -ENODEV;
1853
1854         port_number = port->number - port->serial->minor;
1855         switch (port_number) {
1856         case 0:
1857                 edge_port->uart_base = UMPMEM_BASE_UART1;
1858                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1859                 break;
1860         case 1:
1861                 edge_port->uart_base = UMPMEM_BASE_UART2;
1862                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1863                 break;
1864         default:
1865                 dev_err(&port->dev, "Unknown port number!!!\n");
1866                 return -ENODEV;
1867         }
1868
1869         dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1870                                 __func__, port_number, edge_port->uart_base,
1871                                 edge_port->dma_address);
1872
1873         dev = port->serial->dev;
1874
1875         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1876         init_waitqueue_head(&edge_port->delta_msr_wait);
1877
1878         /* turn off loopback */
1879         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1880         if (status) {
1881                 dev_err(&port->dev,
1882                                 "%s - cannot send clear loopback command, %d\n",
1883                         __func__, status);
1884                 return status;
1885         }
1886
1887         /* set up the port settings */
1888         if (tty)
1889                 edge_set_termios(tty, port, tty->termios);
1890
1891         /* open up the port */
1892
1893         /* milliseconds to timeout for DMA transfer */
1894         transaction_timeout = 2;
1895
1896         edge_port->ump_read_timeout =
1897                                 max(20, ((transaction_timeout * 3) / 2));
1898
1899         /* milliseconds to timeout for DMA transfer */
1900         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1901                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1902                              (transaction_timeout << 2));
1903
1904         dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1905
1906         /* Tell TI to open and start the port */
1907         status = send_cmd(dev, UMPC_OPEN_PORT,
1908                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1909         if (status) {
1910                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1911                                                         __func__, status);
1912                 return status;
1913         }
1914
1915         /* Start the DMA? */
1916         status = send_cmd(dev, UMPC_START_PORT,
1917                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1918         if (status) {
1919                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1920                                                         __func__, status);
1921                 return status;
1922         }
1923
1924         /* Clear TX and RX buffers in UMP */
1925         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1926         if (status) {
1927                 dev_err(&port->dev,
1928                         "%s - cannot send clear buffers command, %d\n",
1929                         __func__, status);
1930                 return status;
1931         }
1932
1933         /* Read Initial MSR */
1934         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1935                                 (__u16)(UMPM_UART1_PORT + port_number),
1936                                 &edge_port->shadow_msr, 1);
1937         if (status) {
1938                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1939                                                         __func__, status);
1940                 return status;
1941         }
1942
1943         dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1944
1945         /* Set Initial MCR */
1946         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1947         dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1948
1949         edge_serial = edge_port->edge_serial;
1950         if (mutex_lock_interruptible(&edge_serial->es_lock))
1951                 return -ERESTARTSYS;
1952         if (edge_serial->num_ports_open == 0) {
1953                 /* we are the first port to open, post the interrupt urb */
1954                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1955                 if (!urb) {
1956                         dev_err(&port->dev,
1957                                 "%s - no interrupt urb present, exiting\n",
1958                                 __func__);
1959                         status = -EINVAL;
1960                         goto release_es_lock;
1961                 }
1962                 urb->complete = edge_interrupt_callback;
1963                 urb->context = edge_serial;
1964                 urb->dev = dev;
1965                 status = usb_submit_urb(urb, GFP_KERNEL);
1966                 if (status) {
1967                         dev_err(&port->dev,
1968                                 "%s - usb_submit_urb failed with value %d\n",
1969                                         __func__, status);
1970                         goto release_es_lock;
1971                 }
1972         }
1973
1974         /*
1975          * reset the data toggle on the bulk endpoints to work around bug in
1976          * host controllers where things get out of sync some times
1977          */
1978         usb_clear_halt(dev, port->write_urb->pipe);
1979         usb_clear_halt(dev, port->read_urb->pipe);
1980
1981         /* start up our bulk read urb */
1982         urb = port->read_urb;
1983         if (!urb) {
1984                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1985                                                                 __func__);
1986                 status = -EINVAL;
1987                 goto unlink_int_urb;
1988         }
1989         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1990         urb->complete = edge_bulk_in_callback;
1991         urb->context = edge_port;
1992         urb->dev = dev;
1993         status = usb_submit_urb(urb, GFP_KERNEL);
1994         if (status) {
1995                 dev_err(&port->dev,
1996                         "%s - read bulk usb_submit_urb failed with value %d\n",
1997                                 __func__, status);
1998                 goto unlink_int_urb;
1999         }
2000
2001         ++edge_serial->num_ports_open;
2002
2003         dbg("%s - exited", __func__);
2004
2005         goto release_es_lock;
2006
2007 unlink_int_urb:
2008         if (edge_port->edge_serial->num_ports_open == 0)
2009                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2010 release_es_lock:
2011         mutex_unlock(&edge_serial->es_lock);
2012         return status;
2013 }
2014
2015 static void edge_close(struct usb_serial_port *port)
2016 {
2017         struct edgeport_serial *edge_serial;
2018         struct edgeport_port *edge_port;
2019         int port_number;
2020         int status;
2021
2022         dbg("%s - port %d", __func__, port->number);
2023
2024         edge_serial = usb_get_serial_data(port->serial);
2025         edge_port = usb_get_serial_port_data(port);
2026         if (edge_serial == NULL || edge_port == NULL)
2027                 return;
2028
2029         /* The bulkreadcompletion routine will check
2030          * this flag and dump add read data */
2031         edge_port->close_pending = 1;
2032
2033         /* chase the port close and flush */
2034         chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2035
2036         usb_kill_urb(port->read_urb);
2037         usb_kill_urb(port->write_urb);
2038         edge_port->ep_write_urb_in_use = 0;
2039
2040         /* assuming we can still talk to the device,
2041          * send a close port command to it */
2042         dbg("%s - send umpc_close_port", __func__);
2043         port_number = port->number - port->serial->minor;
2044         status = send_cmd(port->serial->dev,
2045                                      UMPC_CLOSE_PORT,
2046                                      (__u8)(UMPM_UART1_PORT + port_number),
2047                                      0,
2048                                      NULL,
2049                                      0);
2050         mutex_lock(&edge_serial->es_lock);
2051         --edge_port->edge_serial->num_ports_open;
2052         if (edge_port->edge_serial->num_ports_open <= 0) {
2053                 /* last port is now closed, let's shut down our interrupt urb */
2054                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2055                 edge_port->edge_serial->num_ports_open = 0;
2056         }
2057         mutex_unlock(&edge_serial->es_lock);
2058         edge_port->close_pending = 0;
2059
2060         dbg("%s - exited", __func__);
2061 }
2062
2063 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2064                                 const unsigned char *data, int count)
2065 {
2066         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2067
2068         dbg("%s - port %d", __func__, port->number);
2069
2070         if (count == 0) {
2071                 dbg("%s - write request of 0 bytes", __func__);
2072                 return 0;
2073         }
2074
2075         if (edge_port == NULL)
2076                 return -ENODEV;
2077         if (edge_port->close_pending == 1)
2078                 return -ENODEV;
2079
2080         count = kfifo_in_locked(&edge_port->write_fifo, data, count,
2081                                                         &edge_port->ep_lock);
2082         edge_send(tty);
2083
2084         return count;
2085 }
2086
2087 static void edge_send(struct tty_struct *tty)
2088 {
2089         struct usb_serial_port *port = tty->driver_data;
2090         int count, result;
2091         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2092         unsigned long flags;
2093
2094
2095         dbg("%s - port %d", __func__, port->number);
2096
2097         spin_lock_irqsave(&edge_port->ep_lock, flags);
2098
2099         if (edge_port->ep_write_urb_in_use) {
2100                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2101                 return;
2102         }
2103
2104         count = kfifo_out(&edge_port->write_fifo,
2105                                 port->write_urb->transfer_buffer,
2106                                 port->bulk_out_size);
2107
2108         if (count == 0) {
2109                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2110                 return;
2111         }
2112
2113         edge_port->ep_write_urb_in_use = 1;
2114
2115         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2116
2117         usb_serial_debug_data(debug, &port->dev, __func__, count,
2118                                 port->write_urb->transfer_buffer);
2119
2120         /* set up our urb */
2121         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
2122                            usb_sndbulkpipe(port->serial->dev,
2123                                             port->bulk_out_endpointAddress),
2124                            port->write_urb->transfer_buffer, count,
2125                            edge_bulk_out_callback,
2126                            port);
2127
2128         /* send the data out the bulk port */
2129         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2130         if (result) {
2131                 dev_err(&port->dev,
2132                         "%s - failed submitting write urb, error %d\n",
2133                                 __func__, result);
2134                 edge_port->ep_write_urb_in_use = 0;
2135                 /* TODO: reschedule edge_send */
2136         } else
2137                 edge_port->icount.tx += count;
2138
2139         /* wakeup any process waiting for writes to complete */
2140         /* there is now more room in the buffer for new writes */
2141         if (tty)
2142                 tty_wakeup(tty);
2143 }
2144
2145 static int edge_write_room(struct tty_struct *tty)
2146 {
2147         struct usb_serial_port *port = tty->driver_data;
2148         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2149         int room = 0;
2150         unsigned long flags;
2151
2152         dbg("%s - port %d", __func__, port->number);
2153
2154         if (edge_port == NULL)
2155                 return 0;
2156         if (edge_port->close_pending == 1)
2157                 return 0;
2158
2159         spin_lock_irqsave(&edge_port->ep_lock, flags);
2160         room = kfifo_avail(&edge_port->write_fifo);
2161         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2162
2163         dbg("%s - returns %d", __func__, room);
2164         return room;
2165 }
2166
2167 static int edge_chars_in_buffer(struct tty_struct *tty)
2168 {
2169         struct usb_serial_port *port = tty->driver_data;
2170         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2171         int chars = 0;
2172         unsigned long flags;
2173
2174         dbg("%s - port %d", __func__, port->number);
2175
2176         if (edge_port == NULL)
2177                 return 0;
2178         if (edge_port->close_pending == 1)
2179                 return 0;
2180
2181         spin_lock_irqsave(&edge_port->ep_lock, flags);
2182         chars = kfifo_len(&edge_port->write_fifo);
2183         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2184
2185         dbg("%s - returns %d", __func__, chars);
2186         return chars;
2187 }
2188
2189 static void edge_throttle(struct tty_struct *tty)
2190 {
2191         struct usb_serial_port *port = tty->driver_data;
2192         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2193         int status;
2194
2195         dbg("%s - port %d", __func__, port->number);
2196
2197         if (edge_port == NULL)
2198                 return;
2199
2200         /* if we are implementing XON/XOFF, send the stop character */
2201         if (I_IXOFF(tty)) {
2202                 unsigned char stop_char = STOP_CHAR(tty);
2203                 status = edge_write(tty, port, &stop_char, 1);
2204                 if (status <= 0) {
2205                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2206                 }
2207         }
2208
2209         /* if we are implementing RTS/CTS, stop reads */
2210         /* and the Edgeport will clear the RTS line */
2211         if (C_CRTSCTS(tty))
2212                 stop_read(edge_port);
2213
2214 }
2215
2216 static void edge_unthrottle(struct tty_struct *tty)
2217 {
2218         struct usb_serial_port *port = tty->driver_data;
2219         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2220         int status;
2221
2222         dbg("%s - port %d", __func__, port->number);
2223
2224         if (edge_port == NULL)
2225                 return;
2226
2227         /* if we are implementing XON/XOFF, send the start character */
2228         if (I_IXOFF(tty)) {
2229                 unsigned char start_char = START_CHAR(tty);
2230                 status = edge_write(tty, port, &start_char, 1);
2231                 if (status <= 0) {
2232                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2233                 }
2234         }
2235         /* if we are implementing RTS/CTS, restart reads */
2236         /* are the Edgeport will assert the RTS line */
2237         if (C_CRTSCTS(tty)) {
2238                 status = restart_read(edge_port);
2239                 if (status)
2240                         dev_err(&port->dev,
2241                                 "%s - read bulk usb_submit_urb failed: %d\n",
2242                                                         __func__, status);
2243         }
2244
2245 }
2246
2247 static void stop_read(struct edgeport_port *edge_port)
2248 {
2249         unsigned long flags;
2250
2251         spin_lock_irqsave(&edge_port->ep_lock, flags);
2252
2253         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2254                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2255         edge_port->shadow_mcr &= ~MCR_RTS;
2256
2257         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2258 }
2259
2260 static int restart_read(struct edgeport_port *edge_port)
2261 {
2262         struct urb *urb;
2263         int status = 0;
2264         unsigned long flags;
2265
2266         spin_lock_irqsave(&edge_port->ep_lock, flags);
2267
2268         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2269                 urb = edge_port->port->read_urb;
2270                 urb->complete = edge_bulk_in_callback;
2271                 urb->context = edge_port;
2272                 urb->dev = edge_port->port->serial->dev;
2273                 status = usb_submit_urb(urb, GFP_ATOMIC);
2274         }
2275         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2276         edge_port->shadow_mcr |= MCR_RTS;
2277
2278         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2279
2280         return status;
2281 }
2282
2283 static void change_port_settings(struct tty_struct *tty,
2284                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2285 {
2286         struct ump_uart_config *config;
2287         int baud;
2288         unsigned cflag;
2289         int status;
2290         int port_number = edge_port->port->number -
2291                                         edge_port->port->serial->minor;
2292
2293         dbg("%s - port %d", __func__, edge_port->port->number);
2294
2295         config = kmalloc (sizeof (*config), GFP_KERNEL);
2296         if (!config) {
2297                 *tty->termios = *old_termios;
2298                 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2299                                                                 __func__);
2300                 return;
2301         }
2302
2303         cflag = tty->termios->c_cflag;
2304
2305         config->wFlags = 0;
2306
2307         /* These flags must be set */
2308         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2309         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2310         config->bUartMode = (__u8)(edge_port->bUartMode);
2311
2312         switch (cflag & CSIZE) {
2313         case CS5:
2314                     config->bDataBits = UMP_UART_CHAR5BITS;
2315                     dbg("%s - data bits = 5", __func__);
2316                     break;
2317         case CS6:
2318                     config->bDataBits = UMP_UART_CHAR6BITS;
2319                     dbg("%s - data bits = 6", __func__);
2320                     break;
2321         case CS7:
2322                     config->bDataBits = UMP_UART_CHAR7BITS;
2323                     dbg("%s - data bits = 7", __func__);
2324                     break;
2325         default:
2326         case CS8:
2327                     config->bDataBits = UMP_UART_CHAR8BITS;
2328                     dbg("%s - data bits = 8", __func__);
2329                             break;
2330         }
2331
2332         if (cflag & PARENB) {
2333                 if (cflag & PARODD) {
2334                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2335                         config->bParity = UMP_UART_ODDPARITY;
2336                         dbg("%s - parity = odd", __func__);
2337                 } else {
2338                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2339                         config->bParity = UMP_UART_EVENPARITY;
2340                         dbg("%s - parity = even", __func__);
2341                 }
2342         } else {
2343                 config->bParity = UMP_UART_NOPARITY;
2344                 dbg("%s - parity = none", __func__);
2345         }
2346
2347         if (cflag & CSTOPB) {
2348                 config->bStopBits = UMP_UART_STOPBIT2;
2349                 dbg("%s - stop bits = 2", __func__);
2350         } else {
2351                 config->bStopBits = UMP_UART_STOPBIT1;
2352                 dbg("%s - stop bits = 1", __func__);
2353         }
2354
2355         /* figure out the flow control settings */
2356         if (cflag & CRTSCTS) {
2357                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2358                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2359                 dbg("%s - RTS/CTS is enabled", __func__);
2360         } else {
2361                 dbg("%s - RTS/CTS is disabled", __func__);
2362                 tty->hw_stopped = 0;
2363                 restart_read(edge_port);
2364         }
2365
2366         /* if we are implementing XON/XOFF, set the start and stop
2367            character in the device */
2368         config->cXon  = START_CHAR(tty);
2369         config->cXoff = STOP_CHAR(tty);
2370
2371         /* if we are implementing INBOUND XON/XOFF */
2372         if (I_IXOFF(tty)) {
2373                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2374                 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2375                      __func__, config->cXon, config->cXoff);
2376         } else
2377                 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2378
2379         /* if we are implementing OUTBOUND XON/XOFF */
2380         if (I_IXON(tty)) {
2381                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2382                 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2383                      __func__, config->cXon, config->cXoff);
2384         } else
2385                 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2386
2387         tty->termios->c_cflag &= ~CMSPAR;
2388
2389         /* Round the baud rate */
2390         baud = tty_get_baud_rate(tty);
2391         if (!baud) {
2392                 /* pick a default, any default... */
2393                 baud = 9600;
2394         } else
2395                 tty_encode_baud_rate(tty, baud, baud);
2396
2397         edge_port->baud_rate = baud;
2398         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2399
2400         /* FIXME: Recompute actual baud from divisor here */
2401
2402         dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2403                                                         config->wBaudRate);
2404
2405         dbg("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
2406         dbg("wFlags:    0x%x", config->wFlags);
2407         dbg("bDataBits:   %d", config->bDataBits);
2408         dbg("bParity:     %d", config->bParity);
2409         dbg("bStopBits:   %d", config->bStopBits);
2410         dbg("cXon:        %d", config->cXon);
2411         dbg("cXoff:       %d", config->cXoff);
2412         dbg("bUartMode:   %d", config->bUartMode);
2413
2414         /* move the word values into big endian mode */
2415         cpu_to_be16s(&config->wFlags);
2416         cpu_to_be16s(&config->wBaudRate);
2417
2418         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2419                                 (__u8)(UMPM_UART1_PORT + port_number),
2420                                 0, (__u8 *)config, sizeof(*config));
2421         if (status)
2422                 dbg("%s - error %d when trying to write config to device",
2423                      __func__, status);
2424         kfree(config);
2425 }
2426
2427 static void edge_set_termios(struct tty_struct *tty,
2428                 struct usb_serial_port *port, struct ktermios *old_termios)
2429 {
2430         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2431         unsigned int cflag;
2432
2433         cflag = tty->termios->c_cflag;
2434
2435         dbg("%s - clfag %08x iflag %08x", __func__,
2436             tty->termios->c_cflag, tty->termios->c_iflag);
2437         dbg("%s - old clfag %08x old iflag %08x", __func__,
2438             old_termios->c_cflag, old_termios->c_iflag);
2439         dbg("%s - port %d", __func__, port->number);
2440
2441         if (edge_port == NULL)
2442                 return;
2443         /* change the port settings to the new ones specified */
2444         change_port_settings(tty, edge_port, old_termios);
2445 }
2446
2447 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
2448                                         unsigned int set, unsigned int clear)
2449 {
2450         struct usb_serial_port *port = tty->driver_data;
2451         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2452         unsigned int mcr;
2453         unsigned long flags;
2454
2455         dbg("%s - port %d", __func__, port->number);
2456
2457         spin_lock_irqsave(&edge_port->ep_lock, flags);
2458         mcr = edge_port->shadow_mcr;
2459         if (set & TIOCM_RTS)
2460                 mcr |= MCR_RTS;
2461         if (set & TIOCM_DTR)
2462                 mcr |= MCR_DTR;
2463         if (set & TIOCM_LOOP)
2464                 mcr |= MCR_LOOPBACK;
2465
2466         if (clear & TIOCM_RTS)
2467                 mcr &= ~MCR_RTS;
2468         if (clear & TIOCM_DTR)
2469                 mcr &= ~MCR_DTR;
2470         if (clear & TIOCM_LOOP)
2471                 mcr &= ~MCR_LOOPBACK;
2472
2473         edge_port->shadow_mcr = mcr;
2474         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2475
2476         restore_mcr(edge_port, mcr);
2477         return 0;
2478 }
2479
2480 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
2481 {
2482         struct usb_serial_port *port = tty->driver_data;
2483         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2484         unsigned int result = 0;
2485         unsigned int msr;
2486         unsigned int mcr;
2487         unsigned long flags;
2488
2489         dbg("%s - port %d", __func__, port->number);
2490
2491         spin_lock_irqsave(&edge_port->ep_lock, flags);
2492
2493         msr = edge_port->shadow_msr;
2494         mcr = edge_port->shadow_mcr;
2495         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2496                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2497                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2498                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2499                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2500                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2501
2502
2503         dbg("%s -- %x", __func__, result);
2504         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2505
2506         return result;
2507 }
2508
2509 static int edge_get_icount(struct tty_struct *tty,
2510                                 struct serial_icounter_struct *icount)
2511 {
2512         struct usb_serial_port *port = tty->driver_data;
2513         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2514         struct async_icount *ic = &edge_port->icount;
2515
2516         icount->cts = ic->cts;
2517         icount->dsr = ic->dsr;
2518         icount->rng = ic->rng;
2519         icount->dcd = ic->dcd;
2520         icount->tx = ic->tx;
2521         icount->rx = ic->rx;
2522         icount->frame = ic->frame;
2523         icount->parity = ic->parity;
2524         icount->overrun = ic->overrun;
2525         icount->brk = ic->brk;
2526         icount->buf_overrun = ic->buf_overrun;
2527         return 0;
2528 }
2529
2530 static int get_serial_info(struct edgeport_port *edge_port,
2531                                 struct serial_struct __user *retinfo)
2532 {
2533         struct serial_struct tmp;
2534
2535         if (!retinfo)
2536                 return -EFAULT;
2537
2538         memset(&tmp, 0, sizeof(tmp));
2539
2540         tmp.type                = PORT_16550A;
2541         tmp.line                = edge_port->port->serial->minor;
2542         tmp.port                = edge_port->port->number;
2543         tmp.irq                 = 0;
2544         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2545         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2546         tmp.baud_base           = 9600;
2547         tmp.close_delay         = 5*HZ;
2548         tmp.closing_wait        = closing_wait;
2549
2550         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2551                 return -EFAULT;
2552         return 0;
2553 }
2554
2555 static int edge_ioctl(struct tty_struct *tty, struct file *file,
2556                                         unsigned int cmd, unsigned long arg)
2557 {
2558         struct usb_serial_port *port = tty->driver_data;
2559         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2560         struct async_icount cnow;
2561         struct async_icount cprev;
2562
2563         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2564
2565         switch (cmd) {
2566         case TIOCGSERIAL:
2567                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2568                 return get_serial_info(edge_port,
2569                                 (struct serial_struct __user *) arg);
2570         case TIOCMIWAIT:
2571                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2572                 cprev = edge_port->icount;
2573                 while (1) {
2574                         interruptible_sleep_on(&edge_port->delta_msr_wait);
2575                         /* see if a signal did it */
2576                         if (signal_pending(current))
2577                                 return -ERESTARTSYS;
2578                         cnow = edge_port->icount;
2579                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2580                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2581                                 return -EIO; /* no change => error */
2582                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2583                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2584                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2585                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2586                                 return 0;
2587                         }
2588                         cprev = cnow;
2589                 }
2590                 /* not reached */
2591                 break;
2592         }
2593         return -ENOIOCTLCMD;
2594 }
2595
2596 static void edge_break(struct tty_struct *tty, int break_state)
2597 {
2598         struct usb_serial_port *port = tty->driver_data;
2599         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2600         int status;
2601         int bv = 0;     /* Off */
2602
2603         dbg("%s - state = %d", __func__, break_state);
2604
2605         /* chase the port close */
2606         chase_port(edge_port, 0, 0);
2607
2608         if (break_state == -1)
2609                 bv = 1; /* On */
2610         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2611         if (status)
2612                 dbg("%s - error %d sending break set/clear command.",
2613                      __func__, status);
2614 }
2615
2616 static int edge_startup(struct usb_serial *serial)
2617 {
2618         struct edgeport_serial *edge_serial;
2619         struct edgeport_port *edge_port;
2620         struct usb_device *dev;
2621         int status;
2622         int i;
2623
2624         dev = serial->dev;
2625
2626         /* create our private serial structure */
2627         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2628         if (edge_serial == NULL) {
2629                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2630                 return -ENOMEM;
2631         }
2632         mutex_init(&edge_serial->es_lock);
2633         edge_serial->serial = serial;
2634         usb_set_serial_data(serial, edge_serial);
2635
2636         status = download_fw(edge_serial);
2637         if (status) {
2638                 kfree(edge_serial);
2639                 return status;
2640         }
2641
2642         /* set up our port private structures */
2643         for (i = 0; i < serial->num_ports; ++i) {
2644                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2645                 if (edge_port == NULL) {
2646                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2647                                                                 __func__);
2648                         goto cleanup;
2649                 }
2650                 spin_lock_init(&edge_port->ep_lock);
2651                 if (kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE,
2652                                                                 GFP_KERNEL)) {
2653                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2654                                                                 __func__);
2655                         kfree(edge_port);
2656                         goto cleanup;
2657                 }
2658                 edge_port->port = serial->port[i];
2659                 edge_port->edge_serial = edge_serial;
2660                 usb_set_serial_port_data(serial->port[i], edge_port);
2661                 edge_port->bUartMode = default_uart_mode;
2662         }
2663
2664         return 0;
2665
2666 cleanup:
2667         for (--i; i >= 0; --i) {
2668                 edge_port = usb_get_serial_port_data(serial->port[i]);
2669                 kfifo_free(&edge_port->write_fifo);
2670                 kfree(edge_port);
2671                 usb_set_serial_port_data(serial->port[i], NULL);
2672         }
2673         kfree(edge_serial);
2674         usb_set_serial_data(serial, NULL);
2675         return -ENOMEM;
2676 }
2677
2678 static void edge_disconnect(struct usb_serial *serial)
2679 {
2680         int i;
2681         struct edgeport_port *edge_port;
2682
2683         dbg("%s", __func__);
2684
2685         for (i = 0; i < serial->num_ports; ++i) {
2686                 edge_port = usb_get_serial_port_data(serial->port[i]);
2687                 edge_remove_sysfs_attrs(edge_port->port);
2688         }
2689 }
2690
2691 static void edge_release(struct usb_serial *serial)
2692 {
2693         int i;
2694         struct edgeport_port *edge_port;
2695
2696         dbg("%s", __func__);
2697
2698         for (i = 0; i < serial->num_ports; ++i) {
2699                 edge_port = usb_get_serial_port_data(serial->port[i]);
2700                 kfifo_free(&edge_port->write_fifo);
2701                 kfree(edge_port);
2702         }
2703         kfree(usb_get_serial_data(serial));
2704 }
2705
2706
2707 /* Sysfs Attributes */
2708
2709 static ssize_t show_uart_mode(struct device *dev,
2710         struct device_attribute *attr, char *buf)
2711 {
2712         struct usb_serial_port *port = to_usb_serial_port(dev);
2713         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2714
2715         return sprintf(buf, "%d\n", edge_port->bUartMode);
2716 }
2717
2718 static ssize_t store_uart_mode(struct device *dev,
2719         struct device_attribute *attr, const char *valbuf, size_t count)
2720 {
2721         struct usb_serial_port *port = to_usb_serial_port(dev);
2722         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2723         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2724
2725         dbg("%s: setting uart_mode = %d", __func__, v);
2726
2727         if (v < 256)
2728                 edge_port->bUartMode = v;
2729         else
2730                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2731
2732         return count;
2733 }
2734
2735 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2736                                                         store_uart_mode);
2737
2738 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2739 {
2740         return device_create_file(&port->dev, &dev_attr_uart_mode);
2741 }
2742
2743 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2744 {
2745         device_remove_file(&port->dev, &dev_attr_uart_mode);
2746         return 0;
2747 }
2748
2749
2750 static struct usb_serial_driver edgeport_1port_device = {
2751         .driver = {
2752                 .owner          = THIS_MODULE,
2753                 .name           = "edgeport_ti_1",
2754         },
2755         .description            = "Edgeport TI 1 port adapter",
2756         .usb_driver             = &io_driver,
2757         .id_table               = edgeport_1port_id_table,
2758         .num_ports              = 1,
2759         .open                   = edge_open,
2760         .close                  = edge_close,
2761         .throttle               = edge_throttle,
2762         .unthrottle             = edge_unthrottle,
2763         .attach                 = edge_startup,
2764         .disconnect             = edge_disconnect,
2765         .release                = edge_release,
2766         .port_probe             = edge_create_sysfs_attrs,
2767         .ioctl                  = edge_ioctl,
2768         .set_termios            = edge_set_termios,
2769         .tiocmget               = edge_tiocmget,
2770         .tiocmset               = edge_tiocmset,
2771         .get_icount             = edge_get_icount,
2772         .write                  = edge_write,
2773         .write_room             = edge_write_room,
2774         .chars_in_buffer        = edge_chars_in_buffer,
2775         .break_ctl              = edge_break,
2776         .read_int_callback      = edge_interrupt_callback,
2777         .read_bulk_callback     = edge_bulk_in_callback,
2778         .write_bulk_callback    = edge_bulk_out_callback,
2779 };
2780
2781 static struct usb_serial_driver edgeport_2port_device = {
2782         .driver = {
2783                 .owner          = THIS_MODULE,
2784                 .name           = "edgeport_ti_2",
2785         },
2786         .description            = "Edgeport TI 2 port adapter",
2787         .usb_driver             = &io_driver,
2788         .id_table               = edgeport_2port_id_table,
2789         .num_ports              = 2,
2790         .open                   = edge_open,
2791         .close                  = edge_close,
2792         .throttle               = edge_throttle,
2793         .unthrottle             = edge_unthrottle,
2794         .attach                 = edge_startup,
2795         .disconnect             = edge_disconnect,
2796         .release                = edge_release,
2797         .port_probe             = edge_create_sysfs_attrs,
2798         .ioctl                  = edge_ioctl,
2799         .set_termios            = edge_set_termios,
2800         .tiocmget               = edge_tiocmget,
2801         .tiocmset               = edge_tiocmset,
2802         .write                  = edge_write,
2803         .write_room             = edge_write_room,
2804         .chars_in_buffer        = edge_chars_in_buffer,
2805         .break_ctl              = edge_break,
2806         .read_int_callback      = edge_interrupt_callback,
2807         .read_bulk_callback     = edge_bulk_in_callback,
2808         .write_bulk_callback    = edge_bulk_out_callback,
2809 };
2810
2811
2812 static int __init edgeport_init(void)
2813 {
2814         int retval;
2815         retval = usb_serial_register(&edgeport_1port_device);
2816         if (retval)
2817                 goto failed_1port_device_register;
2818         retval = usb_serial_register(&edgeport_2port_device);
2819         if (retval)
2820                 goto failed_2port_device_register;
2821         retval = usb_register(&io_driver);
2822         if (retval)
2823                 goto failed_usb_register;
2824         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2825                DRIVER_DESC "\n");
2826         return 0;
2827 failed_usb_register:
2828         usb_serial_deregister(&edgeport_2port_device);
2829 failed_2port_device_register:
2830         usb_serial_deregister(&edgeport_1port_device);
2831 failed_1port_device_register:
2832         return retval;
2833 }
2834
2835 static void __exit edgeport_exit(void)
2836 {
2837         usb_deregister(&io_driver);
2838         usb_serial_deregister(&edgeport_1port_device);
2839         usb_serial_deregister(&edgeport_2port_device);
2840 }
2841
2842 module_init(edgeport_init);
2843 module_exit(edgeport_exit);
2844
2845 /* Module information */
2846 MODULE_AUTHOR(DRIVER_AUTHOR);
2847 MODULE_DESCRIPTION(DRIVER_DESC);
2848 MODULE_LICENSE("GPL");
2849 MODULE_FIRMWARE("edgeport/down3.bin");
2850
2851 module_param(debug, bool, S_IRUGO | S_IWUSR);
2852 MODULE_PARM_DESC(debug, "Debug enabled or not");
2853
2854 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2855 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2856
2857 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2858 MODULE_PARM_DESC(ignore_cpu_rev,
2859                         "Ignore the cpu revision when connecting to a device");
2860
2861 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2862 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");