Merge branch 'gart/rename' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[linux-2.6.git] / arch / arm / mach-pxa / viper.c
1 /*
2  *  linux/arch/arm/mach-pxa/viper.c
3  *
4  *  Support for the Arcom VIPER SBC.
5  *
6  *  Author:     Ian Campbell
7  *  Created:    Feb 03, 2003
8  *  Copyright:  Arcom Control Systems
9  *
10  *  Maintained by Marc Zyngier <maz@misterjones.org>
11  *                             <marc.zyngier@altran.com>
12  *
13  * Based on lubbock.c:
14  *  Author:     Nicolas Pitre
15  *  Created:    Jun 15, 2001
16  *  Copyright:  MontaVista Software Inc.
17  *
18  *  This program is free software; you can redistribute it and/or modify
19  *  it under the terms of the GNU General Public License version 2 as
20  *  published by the Free Software Foundation.
21  */
22
23 #include <linux/types.h>
24 #include <linux/memory.h>
25 #include <linux/cpu.h>
26 #include <linux/cpufreq.h>
27 #include <linux/delay.h>
28 #include <linux/fs.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/major.h>
33 #include <linux/module.h>
34 #include <linux/pm.h>
35 #include <linux/sched.h>
36 #include <linux/gpio.h>
37 #include <linux/jiffies.h>
38 #include <linux/i2c-gpio.h>
39 #include <linux/i2c/pxa-i2c.h>
40 #include <linux/serial_8250.h>
41 #include <linux/smc91x.h>
42 #include <linux/pwm_backlight.h>
43 #include <linux/usb/isp116x.h>
44 #include <linux/mtd/mtd.h>
45 #include <linux/mtd/partitions.h>
46 #include <linux/mtd/physmap.h>
47
48 #include <mach/pxa25x.h>
49 #include <mach/audio.h>
50 #include <mach/pxafb.h>
51 #include <mach/regs-uart.h>
52 #include <mach/arcom-pcmcia.h>
53 #include <mach/viper.h>
54
55 #include <asm/setup.h>
56 #include <asm/mach-types.h>
57 #include <asm/irq.h>
58 #include <asm/sizes.h>
59
60 #include <asm/mach/arch.h>
61 #include <asm/mach/map.h>
62 #include <asm/mach/irq.h>
63
64 #include "generic.h"
65 #include "devices.h"
66
67 static unsigned int icr;
68
69 static void viper_icr_set_bit(unsigned int bit)
70 {
71         icr |= bit;
72         VIPER_ICR = icr;
73 }
74
75 static void viper_icr_clear_bit(unsigned int bit)
76 {
77         icr &= ~bit;
78         VIPER_ICR = icr;
79 }
80
81 /* This function is used from the pcmcia module to reset the CF */
82 static void viper_cf_reset(int state)
83 {
84         if (state)
85                 viper_icr_set_bit(VIPER_ICR_CF_RST);
86         else
87                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
88 }
89
90 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
91         .cd_gpio        = VIPER_CF_CD_GPIO,
92         .rdy_gpio       = VIPER_CF_RDY_GPIO,
93         .pwr_gpio       = VIPER_CF_POWER_GPIO,
94         .reset          = viper_cf_reset,
95 };
96
97 static struct platform_device viper_pcmcia_device = {
98         .name           = "viper-pcmcia",
99         .id             = -1,
100         .dev            = {
101                 .platform_data  = &viper_pcmcia_info,
102         },
103 };
104
105 /*
106  * The CPLD version register was not present on VIPER boards prior to
107  * v2i1. On v1 boards where the version register is not present we
108  * will just read back the previous value from the databus.
109  *
110  * Therefore we do two reads. The first time we write 0 to the
111  * (read-only) register before reading and the second time we write
112  * 0xff first. If the two reads do not match or they read back as 0xff
113  * or 0x00 then we have version 1 hardware.
114  */
115 static u8 viper_hw_version(void)
116 {
117         u8 v1, v2;
118         unsigned long flags;
119
120         local_irq_save(flags);
121
122         VIPER_VERSION = 0;
123         v1 = VIPER_VERSION;
124         VIPER_VERSION = 0xff;
125         v2 = VIPER_VERSION;
126
127         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
128
129         local_irq_restore(flags);
130         return v1;
131 }
132
133 /* CPU sysdev */
134 static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
135 {
136         viper_icr_set_bit(VIPER_ICR_R_DIS);
137         return 0;
138 }
139
140 static int viper_cpu_resume(struct sys_device *sysdev)
141 {
142         viper_icr_clear_bit(VIPER_ICR_R_DIS);
143         return 0;
144 }
145
146 static struct sysdev_driver viper_cpu_sysdev_driver = {
147         .suspend        = viper_cpu_suspend,
148         .resume         = viper_cpu_resume,
149 };
150
151 static unsigned int current_voltage_divisor;
152
153 /*
154  * If force is not true then step from existing to new divisor. If
155  * force is true then jump straight to the new divisor. Stepping is
156  * used because if the jump in voltage is too large, the VCC can dip
157  * too low and the regulator cuts out.
158  *
159  * force can be used to initialize the divisor to a know state by
160  * setting the value for the current clock speed, since we are already
161  * running at that speed we know the voltage should be pretty close so
162  * the jump won't be too large
163  */
164 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
165 {
166         int i = 0;
167         unsigned int divisor = 0;
168         const char *v;
169
170         if (khz < 200000) {
171                 v = "1.0"; divisor = 0xfff;
172         } else if (khz < 300000) {
173                 v = "1.1"; divisor = 0xde5;
174         } else {
175                 v = "1.3"; divisor = 0x325;
176         }
177
178         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
179                  v, (int)khz / 1000, (int)khz % 1000);
180
181 #define STEP 0x100
182         do {
183                 int step;
184
185                 if (force)
186                         step = divisor;
187                 else if (current_voltage_divisor < divisor - STEP)
188                         step = current_voltage_divisor + STEP;
189                 else if (current_voltage_divisor > divisor + STEP)
190                         step = current_voltage_divisor - STEP;
191                 else
192                         step = divisor;
193                 force = 0;
194
195                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
196                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
197
198                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
199                         udelay(1);
200
201                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
202                         udelay(1);
203
204                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
205                         udelay(1);
206
207                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
208                 }
209                 udelay(1);
210
211                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
212                 udelay(1);
213
214                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
215
216                 current_voltage_divisor = step;
217         } while (current_voltage_divisor != divisor);
218 }
219
220 /* Interrupt handling */
221 static unsigned long viper_irq_enabled_mask;
222 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
223 static const int viper_isa_irq_map[] = {
224         0,              /* ISA irq #0, invalid */
225         0,              /* ISA irq #1, invalid */
226         0,              /* ISA irq #2, invalid */
227         1 << 0,         /* ISA irq #3 */
228         1 << 1,         /* ISA irq #4 */
229         1 << 2,         /* ISA irq #5 */
230         1 << 3,         /* ISA irq #6 */
231         1 << 4,         /* ISA irq #7 */
232         0,              /* ISA irq #8, invalid */
233         1 << 8,         /* ISA irq #9 */
234         1 << 5,         /* ISA irq #10 */
235         1 << 6,         /* ISA irq #11 */
236         1 << 7,         /* ISA irq #12 */
237         0,              /* ISA irq #13, invalid */
238         1 << 9,         /* ISA irq #14 */
239         1 << 10,        /* ISA irq #15 */
240 };
241
242 static inline int viper_irq_to_bitmask(unsigned int irq)
243 {
244         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
245 }
246
247 static inline int viper_bit_to_irq(int bit)
248 {
249         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
250 }
251
252 static void viper_ack_irq(struct irq_data *d)
253 {
254         int viper_irq = viper_irq_to_bitmask(d->irq);
255
256         if (viper_irq & 0xff)
257                 VIPER_LO_IRQ_STATUS = viper_irq;
258         else
259                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
260 }
261
262 static void viper_mask_irq(struct irq_data *d)
263 {
264         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
265 }
266
267 static void viper_unmask_irq(struct irq_data *d)
268 {
269         viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
270 }
271
272 static inline unsigned long viper_irq_pending(void)
273 {
274         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
275                         viper_irq_enabled_mask;
276 }
277
278 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
279 {
280         unsigned long pending;
281
282         pending = viper_irq_pending();
283         do {
284                 /* we're in a chained irq handler,
285                  * so ack the interrupt by hand */
286                 desc->irq_data.chip->irq_ack(&desc->irq_data);
287
288                 if (likely(pending)) {
289                         irq = viper_bit_to_irq(__ffs(pending));
290                         generic_handle_irq(irq);
291                 }
292                 pending = viper_irq_pending();
293         } while (pending);
294 }
295
296 static struct irq_chip viper_irq_chip = {
297         .name           = "ISA",
298         .irq_ack        = viper_ack_irq,
299         .irq_mask       = viper_mask_irq,
300         .irq_unmask     = viper_unmask_irq
301 };
302
303 static void __init viper_init_irq(void)
304 {
305         int level;
306         int isa_irq;
307
308         pxa25x_init_irq();
309
310         /* setup ISA IRQs */
311         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
312                 isa_irq = viper_bit_to_irq(level);
313                 irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
314                                          handle_edge_irq);
315                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
316         }
317
318         irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
319                                 viper_irq_handler);
320         irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
321 }
322
323 /* Flat Panel */
324 static struct pxafb_mode_info fb_mode_info[] = {
325         {
326                 .pixclock       = 157500,
327
328                 .xres           = 320,
329                 .yres           = 240,
330
331                 .bpp            = 16,
332
333                 .hsync_len      = 63,
334                 .left_margin    = 7,
335                 .right_margin   = 13,
336
337                 .vsync_len      = 20,
338                 .upper_margin   = 0,
339                 .lower_margin   = 0,
340
341                 .sync           = 0,
342         },
343 };
344
345 static struct pxafb_mach_info fb_info = {
346         .modes                  = fb_mode_info,
347         .num_modes              = 1,
348         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
349 };
350
351 static int viper_backlight_init(struct device *dev)
352 {
353         int ret;
354
355         /* GPIO9 and 10 control FB backlight. Initialise to off */
356         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
357         if (ret)
358                 goto err_request_bckl;
359
360         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
361         if (ret)
362                 goto err_request_lcd;
363
364         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
365         if (ret)
366                 goto err_dir;
367
368         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
369         if (ret)
370                 goto err_dir;
371
372         return 0;
373
374 err_dir:
375         gpio_free(VIPER_LCD_EN_GPIO);
376 err_request_lcd:
377         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
378 err_request_bckl:
379         dev_err(dev, "Failed to setup LCD GPIOs\n");
380
381         return ret;
382 }
383
384 static int viper_backlight_notify(struct device *dev, int brightness)
385 {
386         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
387         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
388
389         return brightness;
390 }
391
392 static void viper_backlight_exit(struct device *dev)
393 {
394         gpio_free(VIPER_LCD_EN_GPIO);
395         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
396 }
397
398 static struct platform_pwm_backlight_data viper_backlight_data = {
399         .pwm_id         = 0,
400         .max_brightness = 100,
401         .dft_brightness = 100,
402         .pwm_period_ns  = 1000000,
403         .init           = viper_backlight_init,
404         .notify         = viper_backlight_notify,
405         .exit           = viper_backlight_exit,
406 };
407
408 static struct platform_device viper_backlight_device = {
409         .name           = "pwm-backlight",
410         .dev            = {
411                 .parent         = &pxa25x_device_pwm0.dev,
412                 .platform_data  = &viper_backlight_data,
413         },
414 };
415
416 /* Ethernet */
417 static struct resource smc91x_resources[] = {
418         [0] = {
419                 .name   = "smc91x-regs",
420                 .start  = VIPER_ETH_PHYS + 0x300,
421                 .end    = VIPER_ETH_PHYS + 0x30f,
422                 .flags  = IORESOURCE_MEM,
423         },
424         [1] = {
425                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
426                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
427                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
428         },
429         [2] = {
430                 .name   = "smc91x-data32",
431                 .start  = VIPER_ETH_DATA_PHYS,
432                 .end    = VIPER_ETH_DATA_PHYS + 3,
433                 .flags  = IORESOURCE_MEM,
434         },
435 };
436
437 static struct smc91x_platdata viper_smc91x_info = {
438         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
439         .leda   = RPC_LED_100_10,
440         .ledb   = RPC_LED_TX_RX,
441 };
442
443 static struct platform_device smc91x_device = {
444         .name           = "smc91x",
445         .id             = -1,
446         .num_resources  = ARRAY_SIZE(smc91x_resources),
447         .resource       = smc91x_resources,
448         .dev            = {
449                 .platform_data  = &viper_smc91x_info,
450         },
451 };
452
453 /* i2c */
454 static struct i2c_gpio_platform_data i2c_bus_data = {
455         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
456         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
457         .udelay  = 10,
458         .timeout = HZ,
459 };
460
461 static struct platform_device i2c_bus_device = {
462         .name           = "i2c-gpio",
463         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
464         .dev = {
465                 .platform_data = &i2c_bus_data,
466         }
467 };
468
469 static struct i2c_board_info __initdata viper_i2c_devices[] = {
470         {
471                 I2C_BOARD_INFO("ds1338", 0x68),
472         },
473 };
474
475 /*
476  * Serial configuration:
477  * You can either have the standard PXA ports driven by the PXA driver,
478  * or all the ports (PXA + 16850) driven by the 8250 driver.
479  * Choose your poison.
480  */
481
482 static struct resource viper_serial_resources[] = {
483 #ifndef CONFIG_SERIAL_PXA
484         {
485                 .start  = 0x40100000,
486                 .end    = 0x4010001f,
487                 .flags  = IORESOURCE_MEM,
488         },
489         {
490                 .start  = 0x40200000,
491                 .end    = 0x4020001f,
492                 .flags  = IORESOURCE_MEM,
493         },
494         {
495                 .start  = 0x40700000,
496                 .end    = 0x4070001f,
497                 .flags  = IORESOURCE_MEM,
498         },
499         {
500                 .start  = VIPER_UARTA_PHYS,
501                 .end    = VIPER_UARTA_PHYS + 0xf,
502                 .flags  = IORESOURCE_MEM,
503         },
504         {
505                 .start  = VIPER_UARTB_PHYS,
506                 .end    = VIPER_UARTB_PHYS + 0xf,
507                 .flags  = IORESOURCE_MEM,
508         },
509 #else
510         {
511                 0,
512         },
513 #endif
514 };
515
516 static struct plat_serial8250_port serial_platform_data[] = {
517 #ifndef CONFIG_SERIAL_PXA
518         /* Internal UARTs */
519         {
520                 .membase        = (void *)&FFUART,
521                 .mapbase        = __PREG(FFUART),
522                 .irq            = IRQ_FFUART,
523                 .uartclk        = 921600 * 16,
524                 .regshift       = 2,
525                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
526                 .iotype         = UPIO_MEM,
527         },
528         {
529                 .membase        = (void *)&BTUART,
530                 .mapbase        = __PREG(BTUART),
531                 .irq            = IRQ_BTUART,
532                 .uartclk        = 921600 * 16,
533                 .regshift       = 2,
534                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
535                 .iotype         = UPIO_MEM,
536         },
537         {
538                 .membase        = (void *)&STUART,
539                 .mapbase        = __PREG(STUART),
540                 .irq            = IRQ_STUART,
541                 .uartclk        = 921600 * 16,
542                 .regshift       = 2,
543                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
544                 .iotype         = UPIO_MEM,
545         },
546         /* External UARTs */
547         {
548                 .mapbase        = VIPER_UARTA_PHYS,
549                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
550                 .irqflags       = IRQF_TRIGGER_RISING,
551                 .uartclk        = 1843200,
552                 .regshift       = 1,
553                 .iotype         = UPIO_MEM,
554                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
555                                   UPF_SKIP_TEST,
556         },
557         {
558                 .mapbase        = VIPER_UARTB_PHYS,
559                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
560                 .irqflags       = IRQF_TRIGGER_RISING,
561                 .uartclk        = 1843200,
562                 .regshift       = 1,
563                 .iotype         = UPIO_MEM,
564                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
565                                   UPF_SKIP_TEST,
566         },
567 #endif
568         { },
569 };
570
571 static struct platform_device serial_device = {
572         .name                   = "serial8250",
573         .id                     = 0,
574         .dev                    = {
575                 .platform_data  = serial_platform_data,
576         },
577         .num_resources          = ARRAY_SIZE(viper_serial_resources),
578         .resource               = viper_serial_resources,
579 };
580
581 /* USB */
582 static void isp116x_delay(struct device *dev, int delay)
583 {
584         ndelay(delay);
585 }
586
587 static struct resource isp116x_resources[] = {
588         [0] = { /* DATA */
589                 .start  = VIPER_USB_PHYS + 0,
590                 .end    = VIPER_USB_PHYS + 1,
591                 .flags  = IORESOURCE_MEM,
592         },
593         [1] = { /* ADDR */
594                 .start  = VIPER_USB_PHYS + 2,
595                 .end    = VIPER_USB_PHYS + 3,
596                 .flags  = IORESOURCE_MEM,
597         },
598         [2] = {
599                 .start  = gpio_to_irq(VIPER_USB_GPIO),
600                 .end    = gpio_to_irq(VIPER_USB_GPIO),
601                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
602         },
603 };
604
605 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
606 static struct isp116x_platform_data isp116x_platform_data = {
607         /* Enable internal resistors on downstream ports */
608         .sel15Kres              = 1,
609         /* On-chip overcurrent protection */
610         .oc_enable              = 1,
611         /* INT output polarity */
612         .int_act_high           = 1,
613         /* INT edge or level triggered */
614         .int_edge_triggered     = 0,
615
616         /* WAKEUP pin connected - NOT SUPPORTED  */
617         /* .remote_wakeup_connected = 0, */
618         /* Wakeup by devices on usb bus enabled */
619         .remote_wakeup_enable   = 0,
620         .delay                  = isp116x_delay,
621 };
622
623 static struct platform_device isp116x_device = {
624         .name                   = "isp116x-hcd",
625         .id                     = -1,
626         .num_resources          = ARRAY_SIZE(isp116x_resources),
627         .resource               = isp116x_resources,
628         .dev                    = {
629                 .platform_data  = &isp116x_platform_data,
630         },
631
632 };
633
634 /* MTD */
635 static struct resource mtd_resources[] = {
636         [0] = { /* RedBoot config + filesystem flash */
637                 .start  = VIPER_FLASH_PHYS,
638                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
639                 .flags  = IORESOURCE_MEM,
640         },
641         [1] = { /* Boot flash */
642                 .start  = VIPER_BOOT_PHYS,
643                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
644                 .flags  = IORESOURCE_MEM,
645         },
646         [2] = { /*
647                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
648                  * (each byte is on a 16bit boundary).
649                  */
650                 .start  = _VIPER_SRAM_BASE,
651                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
652                 .flags  = IORESOURCE_MEM,
653         },
654 };
655
656 static struct mtd_partition viper_boot_flash_partition = {
657         .name           = "RedBoot",
658         .size           = SZ_1M,
659         .offset         = 0,
660         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
661 };
662
663 static struct physmap_flash_data viper_flash_data[] = {
664         [0] = {
665                 .width          = 2,
666                 .parts          = NULL,
667                 .nr_parts       = 0,
668         },
669         [1] = {
670                 .width          = 2,
671                 .parts          = &viper_boot_flash_partition,
672                 .nr_parts       = 1,
673         },
674 };
675
676 static struct platform_device viper_mtd_devices[] = {
677         [0] = {
678                 .name           = "physmap-flash",
679                 .id             = 0,
680                 .dev            = {
681                         .platform_data  = &viper_flash_data[0],
682                 },
683                 .resource       = &mtd_resources[0],
684                 .num_resources  = 1,
685         },
686         [1] = {
687                 .name           = "physmap-flash",
688                 .id             = 1,
689                 .dev            = {
690                         .platform_data  = &viper_flash_data[1],
691                 },
692                 .resource       = &mtd_resources[1],
693                 .num_resources  = 1,
694         },
695 };
696
697 static struct platform_device *viper_devs[] __initdata = {
698         &smc91x_device,
699         &i2c_bus_device,
700         &serial_device,
701         &isp116x_device,
702         &viper_mtd_devices[0],
703         &viper_mtd_devices[1],
704         &viper_backlight_device,
705         &viper_pcmcia_device,
706 };
707
708 static mfp_cfg_t viper_pin_config[] __initdata = {
709         /* Chip selects */
710         GPIO15_nCS_1,
711         GPIO78_nCS_2,
712         GPIO79_nCS_3,
713         GPIO80_nCS_4,
714         GPIO33_nCS_5,
715
716         /* AC97 */
717         GPIO28_AC97_BITCLK,
718         GPIO29_AC97_SDATA_IN_0,
719         GPIO30_AC97_SDATA_OUT,
720         GPIO31_AC97_SYNC,
721
722         /* FP Backlight */
723         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
724         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
725         GPIO16_PWM0_OUT,
726
727         /* Ethernet PHY Ready */
728         GPIO18_RDY,
729
730         /* Serial shutdown */
731         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
732
733         /* Compact-Flash / PC104 */
734         GPIO48_nPOE,
735         GPIO49_nPWE,
736         GPIO50_nPIOR,
737         GPIO51_nPIOW,
738         GPIO52_nPCE_1,
739         GPIO53_nPCE_2,
740         GPIO54_nPSKTSEL,
741         GPIO55_nPREG,
742         GPIO56_nPWAIT,
743         GPIO57_nIOIS16,
744         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
745         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
746         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
747
748         /* Integrated UPS control */
749         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
750
751         /* Vcc regulator control */
752         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
753         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
754         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
755
756         /* i2c busses */
757         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
758         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
759         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
760         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
761
762         /* PC/104 Interrupt */
763         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
764 };
765
766 static unsigned long viper_tpm;
767
768 static int __init viper_tpm_setup(char *str)
769 {
770         strict_strtoul(str, 10, &viper_tpm);
771         return 1;
772 }
773
774 __setup("tpm=", viper_tpm_setup);
775
776 static void __init viper_tpm_init(void)
777 {
778         struct platform_device *tpm_device;
779         struct i2c_gpio_platform_data i2c_tpm_data = {
780                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
781                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
782                 .udelay  = 10,
783                 .timeout = HZ,
784         };
785         char *errstr;
786
787         /* Allocate TPM i2c bus if requested */
788         if (!viper_tpm)
789                 return;
790
791         tpm_device = platform_device_alloc("i2c-gpio", 2);
792         if (tpm_device) {
793                 if (!platform_device_add_data(tpm_device,
794                                               &i2c_tpm_data,
795                                               sizeof(i2c_tpm_data))) {
796                         if (platform_device_add(tpm_device)) {
797                                 errstr = "register TPM i2c bus";
798                                 goto error_free_tpm;
799                         }
800                 } else {
801                         errstr = "allocate TPM i2c bus data";
802                         goto error_free_tpm;
803                 }
804         } else {
805                 errstr = "allocate TPM i2c device";
806                 goto error_tpm;
807         }
808
809         return;
810
811 error_free_tpm:
812         kfree(tpm_device);
813 error_tpm:
814         pr_err("viper: Couldn't %s, giving up\n", errstr);
815 }
816
817 static void __init viper_init_vcore_gpios(void)
818 {
819         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
820                 goto err_request_data;
821
822         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
823                 goto err_request_clk;
824
825         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
826                 goto err_request_cs;
827
828         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
829             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
830             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
831                 goto err_dir;
832
833         /* c/should assume redboot set the correct level ??? */
834         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
835
836         return;
837
838 err_dir:
839         gpio_free(VIPER_PSU_nCS_LD_GPIO);
840 err_request_cs:
841         gpio_free(VIPER_PSU_CLK_GPIO);
842 err_request_clk:
843         gpio_free(VIPER_PSU_DATA_GPIO);
844 err_request_data:
845         pr_err("viper: Failed to setup vcore control GPIOs\n");
846 }
847
848 static void __init viper_init_serial_gpio(void)
849 {
850         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
851                 goto err_request;
852
853         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
854                 goto err_dir;
855
856         return;
857
858 err_dir:
859         gpio_free(VIPER_UART_SHDN_GPIO);
860 err_request:
861         pr_err("viper: Failed to setup UART shutdown GPIO\n");
862 }
863
864 #ifdef CONFIG_CPU_FREQ
865 static int viper_cpufreq_notifier(struct notifier_block *nb,
866                                   unsigned long val, void *data)
867 {
868         struct cpufreq_freqs *freq = data;
869
870         /* TODO: Adjust timings??? */
871
872         switch (val) {
873         case CPUFREQ_PRECHANGE:
874                 if (freq->old < freq->new) {
875                         /* we are getting faster so raise the voltage
876                          * before we change freq */
877                         viper_set_core_cpu_voltage(freq->new, 0);
878                 }
879                 break;
880         case CPUFREQ_POSTCHANGE:
881                 if (freq->old > freq->new) {
882                         /* we are slowing down so drop the power
883                          * after we change freq */
884                         viper_set_core_cpu_voltage(freq->new, 0);
885                 }
886                 break;
887         case CPUFREQ_RESUMECHANGE:
888                 viper_set_core_cpu_voltage(freq->new, 0);
889                 break;
890         default:
891                 /* ignore */
892                 break;
893         }
894
895         return 0;
896 }
897
898 static struct notifier_block viper_cpufreq_notifier_block = {
899         .notifier_call  = viper_cpufreq_notifier
900 };
901
902 static void __init viper_init_cpufreq(void)
903 {
904         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
905                                       CPUFREQ_TRANSITION_NOTIFIER))
906                 pr_err("viper: Failed to setup cpufreq notifier\n");
907 }
908 #else
909 static inline void viper_init_cpufreq(void) {}
910 #endif
911
912 static void viper_power_off(void)
913 {
914         pr_notice("Shutting off UPS\n");
915         gpio_set_value(VIPER_UPS_GPIO, 1);
916         /* Spin to death... */
917         while (1);
918 }
919
920 static void __init viper_init(void)
921 {
922         u8 version;
923
924         pm_power_off = viper_power_off;
925
926         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
927
928         pxa_set_ffuart_info(NULL);
929         pxa_set_btuart_info(NULL);
930         pxa_set_stuart_info(NULL);
931
932         /* Wake-up serial console */
933         viper_init_serial_gpio();
934
935         pxa_set_fb_info(NULL, &fb_info);
936
937         /* v1 hardware cannot use the datacs line */
938         version = viper_hw_version();
939         if (version == 0)
940                 smc91x_device.num_resources--;
941
942         pxa_set_i2c_info(NULL);
943         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
944
945         viper_init_vcore_gpios();
946         viper_init_cpufreq();
947
948         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
949
950         if (version) {
951                 pr_info("viper: hardware v%di%d detected. "
952                         "CPLD revision %d.\n",
953                         VIPER_BOARD_VERSION(version),
954                         VIPER_BOARD_ISSUE(version),
955                         VIPER_CPLD_REVISION(version));
956                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
957                              (VIPER_BOARD_ISSUE(version) << 4) |
958                              VIPER_CPLD_REVISION(version);
959         } else {
960                 pr_info("viper: No version register.\n");
961         }
962
963         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
964
965         viper_tpm_init();
966         pxa_set_ac97_info(NULL);
967 }
968
969 static struct map_desc viper_io_desc[] __initdata = {
970         {
971                 .virtual = VIPER_CPLD_BASE,
972                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
973                 .length  = 0x00300000,
974                 .type    = MT_DEVICE,
975         },
976         {
977                 .virtual = VIPER_PC104IO_BASE,
978                 .pfn     = __phys_to_pfn(0x30000000),
979                 .length  = 0x00800000,
980                 .type    = MT_DEVICE,
981         },
982 };
983
984 static void __init viper_map_io(void)
985 {
986         pxa25x_map_io();
987
988         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
989
990         PCFR |= PCFR_OPDE;
991 }
992
993 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
994         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
995         .boot_params    = 0xa0000100,
996         .map_io         = viper_map_io,
997         .init_irq       = viper_init_irq,
998         .timer          = &pxa_timer,
999         .init_machine   = viper_init,
1000 MACHINE_END