Merge branch 'for-linus-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-3.10.git] / arch / arm / mach-s3c24xx / 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 #include <linux/spi/s3c24xx.h>
42
43 #include <linux/mmc/host.h>
44
45 #include <linux/mtd/mtd.h>
46 #include <linux/mtd/nand.h>
47 #include <linux/mtd/nand_ecc.h>
48 #include <linux/mtd/partitions.h>
49 #include <linux/mtd/physmap.h>
50 #include <linux/io.h>
51
52 #include <linux/i2c.h>
53 #include <linux/regulator/machine.h>
54
55 #include <linux/mfd/pcf50633/core.h>
56 #include <linux/mfd/pcf50633/mbc.h>
57 #include <linux/mfd/pcf50633/adc.h>
58 #include <linux/mfd/pcf50633/gpio.h>
59 #include <linux/mfd/pcf50633/pmic.h>
60 #include <linux/mfd/pcf50633/backlight.h>
61
62 #include <linux/input.h>
63 #include <linux/gpio_keys.h>
64
65 #include <asm/mach/arch.h>
66 #include <asm/mach/map.h>
67 #include <asm/mach/irq.h>
68
69 #include <asm/irq.h>
70 #include <asm/mach-types.h>
71
72 #include <mach/regs-irq.h>
73 #include <mach/regs-gpio.h>
74 #include <mach/fb.h>
75
76 #include <plat/usb-control.h>
77 #include <mach/regs-mem.h>
78 #include <mach/hardware.h>
79
80 #include <mach/gta02.h>
81
82 #include <plat/regs-serial.h>
83 #include <plat/nand.h>
84 #include <plat/devs.h>
85 #include <plat/cpu.h>
86 #include <plat/pm.h>
87 #include <plat/udc.h>
88 #include <plat/gpio-cfg.h>
89 #include <plat/iic.h>
90 #include <plat/ts.h>
91
92 #include "common.h"
93
94 static struct pcf50633 *gta02_pcf;
95
96 /*
97  * This gets called frequently when we paniced.
98  */
99
100 static long gta02_panic_blink(int state)
101 {
102         long delay = 0;
103         char led;
104
105         led = (state) ? 1 : 0;
106         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
107
108         return delay;
109 }
110
111
112 static struct map_desc gta02_iodesc[] __initdata = {
113         {
114                 .virtual        = 0xe0000000,
115                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
116                 .length         = SZ_1M,
117                 .type           = MT_DEVICE
118         },
119 };
120
121 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
122 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
123 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
124
125 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
126         [0] = {
127                 .hwport         = 0,
128                 .flags          = 0,
129                 .ucon           = UCON,
130                 .ulcon          = ULCON,
131                 .ufcon          = UFCON,
132         },
133         [1] = {
134                 .hwport         = 1,
135                 .flags          = 0,
136                 .ucon           = UCON,
137                 .ulcon          = ULCON,
138                 .ufcon          = UFCON,
139         },
140         [2] = {
141                 .hwport         = 2,
142                 .flags          = 0,
143                 .ucon           = UCON,
144                 .ulcon          = ULCON,
145                 .ufcon          = UFCON,
146         },
147 };
148
149 #ifdef CONFIG_CHARGER_PCF50633
150 /*
151  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
152  * We use this to recognize that we can pull 1A from the USB socket.
153  *
154  * These constants are the measured pcf50633 ADC levels with the 1A
155  * charger / 48K resistor, and with no pulldown resistor.
156  */
157
158 #define ADC_NOM_CHG_DETECT_1A 6
159 #define ADC_NOM_CHG_DETECT_USB 43
160
161 static void
162 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
163 {
164         int  ma;
165
166         /* Interpret charger type */
167         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
168
169                 /*
170                  * Sanity - stop GPO driving out now that we have a 1A charger
171                  * GPO controls USB Host power generation on GTA02
172                  */
173                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
174
175                 ma = 1000;
176         } else
177                 ma = 100;
178
179         pcf50633_mbc_usb_curlim_set(pcf, ma);
180 }
181
182 static struct delayed_work gta02_charger_work;
183 static int gta02_usb_vbus_draw;
184
185 static void gta02_charger_worker(struct work_struct *work)
186 {
187         if (gta02_usb_vbus_draw) {
188                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
189                 return;
190         }
191
192 #ifdef CONFIG_PCF50633_ADC
193         pcf50633_adc_async_read(gta02_pcf,
194                                 PCF50633_ADCC1_MUX_ADCIN1,
195                                 PCF50633_ADCC1_AVERAGE_16,
196                                 gta02_configure_pmu_for_charger,
197                                 NULL);
198 #else
199         /*
200          * If the PCF50633 ADC is disabled we fallback to a
201          * 100mA limit for safety.
202          */
203         pcf50633_mbc_usb_curlim_set(pcf, 100);
204 #endif
205 }
206
207 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
208
209 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
210 {
211         if (irq == PCF50633_IRQ_USBINS) {
212                 schedule_delayed_work(&gta02_charger_work,
213                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
214
215                 return;
216         }
217
218         if (irq == PCF50633_IRQ_USBREM) {
219                 cancel_delayed_work_sync(&gta02_charger_work);
220                 gta02_usb_vbus_draw = 0;
221         }
222 }
223
224 static void gta02_udc_vbus_draw(unsigned int ma)
225 {
226         if (!gta02_pcf)
227                 return;
228
229         gta02_usb_vbus_draw = ma;
230
231         schedule_delayed_work(&gta02_charger_work,
232                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
233 }
234 #else /* !CONFIG_CHARGER_PCF50633 */
235 #define gta02_pmu_event_callback        NULL
236 #define gta02_udc_vbus_draw             NULL
237 #endif
238
239 /*
240  * This is called when pc50633 is probed, unfortunately quite late in the
241  * day since it is an I2C bus device. Here we can belatedly define some
242  * platform devices with the advantage that we can mark the pcf50633 as the
243  * parent. This makes them get suspended and resumed with their parent
244  * the pcf50633 still around.
245  */
246
247 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
248
249
250 static char *gta02_batteries[] = {
251         "battery",
252 };
253
254 static struct pcf50633_bl_platform_data gta02_backlight_data = {
255         .default_brightness = 0x3f,
256         .default_brightness_limit = 0,
257         .ramp_time = 5,
258 };
259
260 static struct pcf50633_platform_data gta02_pcf_pdata = {
261         .resumers = {
262                 [0] =   PCF50633_INT1_USBINS |
263                         PCF50633_INT1_USBREM |
264                         PCF50633_INT1_ALARM,
265                 [1] =   PCF50633_INT2_ONKEYF,
266                 [2] =   PCF50633_INT3_ONKEY1S,
267                 [3] =   PCF50633_INT4_LOWSYS |
268                         PCF50633_INT4_LOWBAT |
269                         PCF50633_INT4_HIGHTMP,
270         },
271
272         .batteries = gta02_batteries,
273         .num_batteries = ARRAY_SIZE(gta02_batteries),
274
275         .charger_reference_current_ma = 1000,
276
277         .backlight_data = &gta02_backlight_data,
278
279         .reg_init_data = {
280                 [PCF50633_REGULATOR_AUTO] = {
281                         .constraints = {
282                                 .min_uV = 3300000,
283                                 .max_uV = 3300000,
284                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
285                                 .always_on = 1,
286                                 .apply_uV = 1,
287                         },
288                 },
289                 [PCF50633_REGULATOR_DOWN1] = {
290                         .constraints = {
291                                 .min_uV = 1300000,
292                                 .max_uV = 1600000,
293                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
294                                 .always_on = 1,
295                                 .apply_uV = 1,
296                         },
297                 },
298                 [PCF50633_REGULATOR_DOWN2] = {
299                         .constraints = {
300                                 .min_uV = 1800000,
301                                 .max_uV = 1800000,
302                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
303                                 .apply_uV = 1,
304                                 .always_on = 1,
305                         },
306                 },
307                 [PCF50633_REGULATOR_HCLDO] = {
308                         .constraints = {
309                                 .min_uV = 2000000,
310                                 .max_uV = 3300000,
311                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
312                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
313                                                 REGULATOR_CHANGE_STATUS,
314                         },
315                 },
316                 [PCF50633_REGULATOR_LDO1] = {
317                         .constraints = {
318                                 .min_uV = 3300000,
319                                 .max_uV = 3300000,
320                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
321                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
322                                 .apply_uV = 1,
323                         },
324                 },
325                 [PCF50633_REGULATOR_LDO2] = {
326                         .constraints = {
327                                 .min_uV = 3300000,
328                                 .max_uV = 3300000,
329                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
330                                 .apply_uV = 1,
331                         },
332                 },
333                 [PCF50633_REGULATOR_LDO3] = {
334                         .constraints = {
335                                 .min_uV = 3000000,
336                                 .max_uV = 3000000,
337                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
338                                 .apply_uV = 1,
339                         },
340                 },
341                 [PCF50633_REGULATOR_LDO4] = {
342                         .constraints = {
343                                 .min_uV = 3200000,
344                                 .max_uV = 3200000,
345                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
346                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
347                                 .apply_uV = 1,
348                         },
349                 },
350                 [PCF50633_REGULATOR_LDO5] = {
351                         .constraints = {
352                                 .min_uV = 3000000,
353                                 .max_uV = 3000000,
354                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
355                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
356                                 .apply_uV = 1,
357                         },
358                 },
359                 [PCF50633_REGULATOR_LDO6] = {
360                         .constraints = {
361                                 .min_uV = 3000000,
362                                 .max_uV = 3000000,
363                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
364                         },
365                 },
366                 [PCF50633_REGULATOR_MEMLDO] = {
367                         .constraints = {
368                                 .min_uV = 1800000,
369                                 .max_uV = 1800000,
370                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
371                         },
372                 },
373
374         },
375         .probe_done = gta02_pmu_attach_child_devices,
376         .mbc_event_callback = gta02_pmu_event_callback,
377 };
378
379
380 /* NOR Flash. */
381
382 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
383 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
384
385 static struct physmap_flash_data gta02_nor_flash_data = {
386         .width          = 2,
387 };
388
389 static struct resource gta02_nor_flash_resource =
390         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
391
392 static struct platform_device gta02_nor_flash = {
393         .name           = "physmap-flash",
394         .id             = 0,
395         .dev            = {
396                 .platform_data  = &gta02_nor_flash_data,
397         },
398         .resource       = &gta02_nor_flash_resource,
399         .num_resources  = 1,
400 };
401
402
403 static struct platform_device s3c24xx_pwm_device = {
404         .name           = "s3c24xx_pwm",
405         .num_resources  = 0,
406 };
407
408 static struct platform_device gta02_dfbmcs320_device = {
409         .name = "dfbmcs320",
410 };
411
412 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
413         {
414                 I2C_BOARD_INFO("pcf50633", 0x73),
415                 .irq = GTA02_IRQ_PCF50633,
416                 .platform_data = &gta02_pcf_pdata,
417         },
418         {
419                 I2C_BOARD_INFO("wm8753", 0x1a),
420         },
421 };
422
423 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
424         [0] = {
425                 /*
426                  * This name is also hard-coded in the boot loaders, so
427                  * changing it would would require all users to upgrade
428                  * their boot loaders, some of which are stored in a NOR
429                  * that is considered to be immutable.
430                  */
431                 .name           = "neo1973-nand",
432                 .nr_chips       = 1,
433                 .flash_bbt      = 1,
434         },
435 };
436
437 /*
438  * Choose a set of timings derived from S3C@2442B MCP54
439  * data sheet (K5D2G13ACM-D075 MCP Memory).
440  */
441
442 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
443         .tacls          = 0,
444         .twrph0         = 25,
445         .twrph1         = 15,
446         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
447         .sets           = gta02_nand_sets,
448 };
449
450
451 /* Get PMU to set USB current limit accordingly. */
452 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
453         .vbus_draw      = gta02_udc_vbus_draw,
454         .pullup_pin = GTA02_GPIO_USB_PULLUP,
455 };
456
457 /* USB */
458 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
459         .port[0]        = {
460                 .flags  = S3C_HCDFLG_USED,
461         },
462         .port[1]        = {
463                 .flags  = 0,
464         },
465 };
466
467 /* Touchscreen */
468 static struct s3c2410_ts_mach_info gta02_ts_info = {
469         .delay                  = 10000,
470         .presc                  = 0xff, /* slow as we can go */
471         .oversampling_shift     = 2,
472 };
473
474 /* Buttons */
475 static struct gpio_keys_button gta02_buttons[] = {
476         {
477                 .gpio = GTA02_GPIO_AUX_KEY,
478                 .code = KEY_PHONE,
479                 .desc = "Aux",
480                 .type = EV_KEY,
481                 .debounce_interval = 100,
482         },
483         {
484                 .gpio = GTA02_GPIO_HOLD_KEY,
485                 .code = KEY_PAUSE,
486                 .desc = "Hold",
487                 .type = EV_KEY,
488                 .debounce_interval = 100,
489         },
490 };
491
492 static struct gpio_keys_platform_data gta02_buttons_pdata = {
493         .buttons = gta02_buttons,
494         .nbuttons = ARRAY_SIZE(gta02_buttons),
495 };
496
497 static struct platform_device gta02_buttons_device = {
498         .name = "gpio-keys",
499         .id = -1,
500         .dev = {
501                 .platform_data = &gta02_buttons_pdata,
502         },
503 };
504
505 static void __init gta02_map_io(void)
506 {
507         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
508         s3c24xx_init_clocks(12000000);
509         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
510 }
511
512
513 /* These are the guys that don't need to be children of PMU. */
514
515 static struct platform_device *gta02_devices[] __initdata = {
516         &s3c_device_ohci,
517         &s3c_device_wdt,
518         &s3c_device_sdi,
519         &s3c_device_usbgadget,
520         &s3c_device_nand,
521         &gta02_nor_flash,
522         &s3c24xx_pwm_device,
523         &s3c_device_iis,
524         &samsung_asoc_dma,
525         &s3c_device_i2c0,
526         &gta02_dfbmcs320_device,
527         &gta02_buttons_device,
528         &s3c_device_adc,
529         &s3c_device_ts,
530 };
531
532 /* These guys DO need to be children of PMU. */
533
534 static struct platform_device *gta02_devices_pmu_children[] = {
535 };
536
537
538 /*
539  * This is called when pc50633 is probed, quite late in the day since it is an
540  * I2C bus device.  Here we can define platform devices with the advantage that
541  * we can mark the pcf50633 as the parent.  This makes them get suspended and
542  * resumed with their parent the pcf50633 still around.  All devices whose
543  * operation depends on something from pcf50633 must have this relationship
544  * made explicit like this, or suspend and resume will become an unreliable
545  * hellworld.
546  */
547
548 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
549 {
550         int n;
551
552         /* Grab a copy of the now probed PMU pointer. */
553         gta02_pcf = pcf;
554
555         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
556                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
557
558         platform_add_devices(gta02_devices_pmu_children,
559                              ARRAY_SIZE(gta02_devices_pmu_children));
560 }
561
562 static void gta02_poweroff(void)
563 {
564         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
565 }
566
567 static void __init gta02_machine_init(void)
568 {
569         /* Set the panic callback to turn AUX LED on or off. */
570         panic_blink = gta02_panic_blink;
571
572         s3c_pm_init();
573
574 #ifdef CONFIG_CHARGER_PCF50633
575         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
576 #endif
577
578         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
579         s3c24xx_ts_set_platdata(&gta02_ts_info);
580         s3c_ohci_set_platdata(&gta02_usb_info);
581         s3c_nand_set_platdata(&gta02_nand_info);
582         s3c_i2c0_set_platdata(NULL);
583
584         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
585
586         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
587         pm_power_off = gta02_poweroff;
588
589         regulator_has_full_constraints();
590 }
591
592
593 MACHINE_START(NEO1973_GTA02, "GTA02")
594         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
595         .atag_offset    = 0x100,
596         .map_io         = gta02_map_io,
597         .init_irq       = s3c24xx_init_irq,
598         .init_machine   = gta02_machine_init,
599         .timer          = &s3c24xx_timer,
600         .restart        = s3c244x_restart,
601 MACHINE_END