Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
[linux-2.6.git] / arch / arm / mach-s3c2440 / mach-gta02.c
1 /*
2  * linux/arch/arm/mach-s3c2442/mach-gta02.c
3  *
4  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
5  *
6  * Copyright (C) 2006-2009 by Openmoko, Inc.
7  * Authors: Harald Welte <laforge@openmoko.org>
8  *          Andy Green <andy@openmoko.org>
9  *          Werner Almesberger <werner@openmoko.org>
10  * All rights reserved.
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License as
14  * published by the Free Software Foundation; either version 2 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25  * MA 02111-1307 USA
26  *
27  */
28
29 #include <linux/kernel.h>
30 #include <linux/types.h>
31 #include <linux/interrupt.h>
32 #include <linux/list.h>
33 #include <linux/delay.h>
34 #include <linux/timer.h>
35 #include <linux/init.h>
36 #include <linux/gpio.h>
37 #include <linux/workqueue.h>
38 #include <linux/platform_device.h>
39 #include <linux/serial_core.h>
40 #include <linux/spi/spi.h>
41
42 #include <linux/mmc/host.h>
43
44 #include <linux/mtd/mtd.h>
45 #include <linux/mtd/nand.h>
46 #include <linux/mtd/nand_ecc.h>
47 #include <linux/mtd/partitions.h>
48 #include <linux/mtd/physmap.h>
49 #include <linux/io.h>
50
51 #include <linux/i2c.h>
52 #include <linux/regulator/machine.h>
53
54 #include <linux/mfd/pcf50633/core.h>
55 #include <linux/mfd/pcf50633/mbc.h>
56 #include <linux/mfd/pcf50633/adc.h>
57 #include <linux/mfd/pcf50633/gpio.h>
58 #include <linux/mfd/pcf50633/pmic.h>
59 #include <linux/mfd/pcf50633/backlight.h>
60
61 #include <asm/mach/arch.h>
62 #include <asm/mach/map.h>
63 #include <asm/mach/irq.h>
64
65 #include <asm/irq.h>
66 #include <asm/mach-types.h>
67
68 #include <mach/regs-irq.h>
69 #include <mach/regs-gpio.h>
70 #include <mach/regs-gpioj.h>
71 #include <mach/fb.h>
72
73 #include <mach/spi.h>
74 #include <mach/spi-gpio.h>
75 #include <plat/usb-control.h>
76 #include <mach/regs-mem.h>
77 #include <mach/hardware.h>
78
79 #include <mach/gta02.h>
80
81 #include <plat/regs-serial.h>
82 #include <plat/nand.h>
83 #include <plat/devs.h>
84 #include <plat/cpu.h>
85 #include <plat/pm.h>
86 #include <plat/udc.h>
87 #include <plat/gpio-cfg.h>
88 #include <plat/iic.h>
89
90 static struct pcf50633 *gta02_pcf;
91
92 /*
93  * This gets called frequently when we paniced.
94  */
95
96 static long gta02_panic_blink(int state)
97 {
98         long delay = 0;
99         char led;
100
101         led = (state) ? 1 : 0;
102         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
103
104         return delay;
105 }
106
107
108 static struct map_desc gta02_iodesc[] __initdata = {
109         {
110                 .virtual        = 0xe0000000,
111                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
112                 .length         = SZ_1M,
113                 .type           = MT_DEVICE
114         },
115 };
116
117 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
118 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
119 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
120
121 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
122         [0] = {
123                 .hwport         = 0,
124                 .flags          = 0,
125                 .ucon           = UCON,
126                 .ulcon          = ULCON,
127                 .ufcon          = UFCON,
128         },
129         [1] = {
130                 .hwport         = 1,
131                 .flags          = 0,
132                 .ucon           = UCON,
133                 .ulcon          = ULCON,
134                 .ufcon          = UFCON,
135         },
136         [2] = {
137                 .hwport         = 2,
138                 .flags          = 0,
139                 .ucon           = UCON,
140                 .ulcon          = ULCON,
141                 .ufcon          = UFCON,
142         },
143 };
144
145 #ifdef CONFIG_CHARGER_PCF50633
146 /*
147  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
148  * We use this to recognize that we can pull 1A from the USB socket.
149  *
150  * These constants are the measured pcf50633 ADC levels with the 1A
151  * charger / 48K resistor, and with no pulldown resistor.
152  */
153
154 #define ADC_NOM_CHG_DETECT_1A 6
155 #define ADC_NOM_CHG_DETECT_USB 43
156
157 static void
158 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
159 {
160         int  ma;
161
162         /* Interpret charger type */
163         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
164
165                 /*
166                  * Sanity - stop GPO driving out now that we have a 1A charger
167                  * GPO controls USB Host power generation on GTA02
168                  */
169                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
170
171                 ma = 1000;
172         } else
173                 ma = 100;
174
175         pcf50633_mbc_usb_curlim_set(pcf, ma);
176 }
177
178 static struct delayed_work gta02_charger_work;
179 static int gta02_usb_vbus_draw;
180
181 static void gta02_charger_worker(struct work_struct *work)
182 {
183         if (gta02_usb_vbus_draw) {
184                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
185                 return;
186         }
187
188 #ifdef CONFIG_PCF50633_ADC
189         pcf50633_adc_async_read(gta02_pcf,
190                                 PCF50633_ADCC1_MUX_ADCIN1,
191                                 PCF50633_ADCC1_AVERAGE_16,
192                                 gta02_configure_pmu_for_charger,
193                                 NULL);
194 #else
195         /*
196          * If the PCF50633 ADC is disabled we fallback to a
197          * 100mA limit for safety.
198          */
199         pcf50633_mbc_usb_curlim_set(pcf, 100);
200 #endif
201 }
202
203 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
204
205 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
206 {
207         if (irq == PCF50633_IRQ_USBINS) {
208                 schedule_delayed_work(&gta02_charger_work,
209                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
210
211                 return;
212         }
213
214         if (irq == PCF50633_IRQ_USBREM) {
215                 cancel_delayed_work_sync(&gta02_charger_work);
216                 gta02_usb_vbus_draw = 0;
217         }
218 }
219
220 static void gta02_udc_vbus_draw(unsigned int ma)
221 {
222         if (!gta02_pcf)
223                 return;
224
225         gta02_usb_vbus_draw = ma;
226
227         schedule_delayed_work(&gta02_charger_work,
228                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
229 }
230 #else /* !CONFIG_CHARGER_PCF50633 */
231 #define gta02_pmu_event_callback        NULL
232 #define gta02_udc_vbus_draw             NULL
233 #endif
234
235 /*
236  * This is called when pc50633 is probed, unfortunately quite late in the
237  * day since it is an I2C bus device. Here we can belatedly define some
238  * platform devices with the advantage that we can mark the pcf50633 as the
239  * parent. This makes them get suspended and resumed with their parent
240  * the pcf50633 still around.
241  */
242
243 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
244
245
246 static char *gta02_batteries[] = {
247         "battery",
248 };
249
250 static struct pcf50633_bl_platform_data gta02_backlight_data = {
251         .default_brightness = 0x3f,
252         .default_brightness_limit = 0,
253         .ramp_time = 5,
254 };
255
256 struct pcf50633_platform_data gta02_pcf_pdata = {
257         .resumers = {
258                 [0] =   PCF50633_INT1_USBINS |
259                         PCF50633_INT1_USBREM |
260                         PCF50633_INT1_ALARM,
261                 [1] =   PCF50633_INT2_ONKEYF,
262                 [2] =   PCF50633_INT3_ONKEY1S,
263                 [3] =   PCF50633_INT4_LOWSYS |
264                         PCF50633_INT4_LOWBAT |
265                         PCF50633_INT4_HIGHTMP,
266         },
267
268         .batteries = gta02_batteries,
269         .num_batteries = ARRAY_SIZE(gta02_batteries),
270
271         .charger_reference_current_ma = 1000,
272
273         .backlight_data = &gta02_backlight_data,
274
275         .reg_init_data = {
276                 [PCF50633_REGULATOR_AUTO] = {
277                         .constraints = {
278                                 .min_uV = 3300000,
279                                 .max_uV = 3300000,
280                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
281                                 .always_on = 1,
282                                 .apply_uV = 1,
283                                 .state_mem = {
284                                         .enabled = 1,
285                                 },
286                         },
287                 },
288                 [PCF50633_REGULATOR_DOWN1] = {
289                         .constraints = {
290                                 .min_uV = 1300000,
291                                 .max_uV = 1600000,
292                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
293                                 .always_on = 1,
294                                 .apply_uV = 1,
295                         },
296                 },
297                 [PCF50633_REGULATOR_DOWN2] = {
298                         .constraints = {
299                                 .min_uV = 1800000,
300                                 .max_uV = 1800000,
301                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
302                                 .apply_uV = 1,
303                                 .always_on = 1,
304                                 .state_mem = {
305                                         .enabled = 1,
306                                 },
307                         },
308                 },
309                 [PCF50633_REGULATOR_HCLDO] = {
310                         .constraints = {
311                                 .min_uV = 2000000,
312                                 .max_uV = 3300000,
313                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
314                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
315                                 .always_on = 1,
316                         },
317                 },
318                 [PCF50633_REGULATOR_LDO1] = {
319                         .constraints = {
320                                 .min_uV = 3300000,
321                                 .max_uV = 3300000,
322                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
323                                 .apply_uV = 1,
324                                 .state_mem = {
325                                         .enabled = 0,
326                                 },
327                         },
328                 },
329                 [PCF50633_REGULATOR_LDO2] = {
330                         .constraints = {
331                                 .min_uV = 3300000,
332                                 .max_uV = 3300000,
333                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
334                                 .apply_uV = 1,
335                         },
336                 },
337                 [PCF50633_REGULATOR_LDO3] = {
338                         .constraints = {
339                                 .min_uV = 3000000,
340                                 .max_uV = 3000000,
341                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
342                                 .apply_uV = 1,
343                         },
344                 },
345                 [PCF50633_REGULATOR_LDO4] = {
346                         .constraints = {
347                                 .min_uV = 3200000,
348                                 .max_uV = 3200000,
349                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
350                                 .apply_uV = 1,
351                         },
352                 },
353                 [PCF50633_REGULATOR_LDO5] = {
354                         .constraints = {
355                                 .min_uV = 3000000,
356                                 .max_uV = 3000000,
357                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
358                                 .apply_uV = 1,
359                                 .state_mem = {
360                                         .enabled = 1,
361                                 },
362                         },
363                 },
364                 [PCF50633_REGULATOR_LDO6] = {
365                         .constraints = {
366                                 .min_uV = 3000000,
367                                 .max_uV = 3000000,
368                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
369                         },
370                 },
371                 [PCF50633_REGULATOR_MEMLDO] = {
372                         .constraints = {
373                                 .min_uV = 1800000,
374                                 .max_uV = 1800000,
375                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
376                                 .state_mem = {
377                                         .enabled = 1,
378                                 },
379                         },
380                 },
381
382         },
383         .probe_done = gta02_pmu_attach_child_devices,
384         .mbc_event_callback = gta02_pmu_event_callback,
385 };
386
387
388 /* NOR Flash. */
389
390 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
391 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
392
393 static struct physmap_flash_data gta02_nor_flash_data = {
394         .width          = 2,
395 };
396
397 static struct resource gta02_nor_flash_resource = {
398         .start          = GTA02_FLASH_BASE,
399         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
400         .flags          = IORESOURCE_MEM,
401 };
402
403 static struct platform_device gta02_nor_flash = {
404         .name           = "physmap-flash",
405         .id             = 0,
406         .dev            = {
407                 .platform_data  = &gta02_nor_flash_data,
408         },
409         .resource       = &gta02_nor_flash_resource,
410         .num_resources  = 1,
411 };
412
413
414 struct platform_device s3c24xx_pwm_device = {
415         .name           = "s3c24xx_pwm",
416         .num_resources  = 0,
417 };
418
419 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
420         {
421                 I2C_BOARD_INFO("pcf50633", 0x73),
422                 .irq = GTA02_IRQ_PCF50633,
423                 .platform_data = &gta02_pcf_pdata,
424         },
425         {
426                 I2C_BOARD_INFO("wm8753", 0x1a),
427         },
428 };
429
430 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
431         [0] = {
432                 /*
433                  * This name is also hard-coded in the boot loaders, so
434                  * changing it would would require all users to upgrade
435                  * their boot loaders, some of which are stored in a NOR
436                  * that is considered to be immutable.
437                  */
438                 .name           = "neo1973-nand",
439                 .nr_chips       = 1,
440                 .flash_bbt      = 1,
441         },
442 };
443
444 /*
445  * Choose a set of timings derived from S3C@2442B MCP54
446  * data sheet (K5D2G13ACM-D075 MCP Memory).
447  */
448
449 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
450         .tacls          = 0,
451         .twrph0         = 25,
452         .twrph1         = 15,
453         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
454         .sets           = gta02_nand_sets,
455 };
456
457
458 static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
459 {
460         switch (cmd) {
461         case S3C2410_UDC_P_ENABLE:
462                 pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
463                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
464                 break;
465         case S3C2410_UDC_P_DISABLE:
466                 pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
467                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
468                 break;
469         case S3C2410_UDC_P_RESET:
470                 pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
471                 /* FIXME: Do something here. */
472         }
473 }
474
475 /* Get PMU to set USB current limit accordingly. */
476 static struct s3c2410_udc_mach_info gta02_udc_cfg = {
477         .vbus_draw      = gta02_udc_vbus_draw,
478         .udc_command    = gta02_udc_command,
479
480 };
481
482 /* USB */
483 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
484         .port[0]        = {
485                 .flags  = S3C_HCDFLG_USED,
486         },
487         .port[1]        = {
488                 .flags  = 0,
489         },
490 };
491
492
493 static void __init gta02_map_io(void)
494 {
495         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
496         s3c24xx_init_clocks(12000000);
497         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
498 }
499
500
501 /* These are the guys that don't need to be children of PMU. */
502
503 static struct platform_device *gta02_devices[] __initdata = {
504         &s3c_device_ohci,
505         &s3c_device_wdt,
506         &s3c_device_sdi,
507         &s3c_device_usbgadget,
508         &s3c_device_nand,
509         &gta02_nor_flash,
510         &s3c24xx_pwm_device,
511         &s3c_device_iis,
512         &s3c_device_i2c0,
513 };
514
515 /* These guys DO need to be children of PMU. */
516
517 static struct platform_device *gta02_devices_pmu_children[] = {
518 };
519
520
521 /*
522  * This is called when pc50633 is probed, quite late in the day since it is an
523  * I2C bus device.  Here we can define platform devices with the advantage that
524  * we can mark the pcf50633 as the parent.  This makes them get suspended and
525  * resumed with their parent the pcf50633 still around.  All devices whose
526  * operation depends on something from pcf50633 must have this relationship
527  * made explicit like this, or suspend and resume will become an unreliable
528  * hellworld.
529  */
530
531 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
532 {
533         int n;
534
535         /* Grab a copy of the now probed PMU pointer. */
536         gta02_pcf = pcf;
537
538         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
539                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
540
541         platform_add_devices(gta02_devices_pmu_children,
542                              ARRAY_SIZE(gta02_devices_pmu_children));
543 }
544
545 static void gta02_poweroff(void)
546 {
547         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
548 }
549
550 static void __init gta02_machine_init(void)
551 {
552         /* Set the panic callback to turn AUX LED on or off. */
553         panic_blink = gta02_panic_blink;
554
555         s3c_pm_init();
556
557 #ifdef CONFIG_CHARGER_PCF50633
558         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
559 #endif
560
561         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
562         s3c_ohci_set_platdata(&gta02_usb_info);
563         s3c_nand_set_platdata(&gta02_nand_info);
564         s3c_i2c0_set_platdata(NULL);
565
566         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
567
568         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
569         pm_power_off = gta02_poweroff;
570 }
571
572
573 MACHINE_START(NEO1973_GTA02, "GTA02")
574         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
575         .boot_params    = S3C2410_SDRAM_PA + 0x100,
576         .map_io         = gta02_map_io,
577         .init_irq       = s3c24xx_init_irq,
578         .init_machine   = gta02_machine_init,
579         .timer          = &s3c24xx_timer,
580 MACHINE_END