a25e8c5a7b4c9a3fe236af761e08814c97234267
[sfrench/cifs-2.6.git] / arch / arm / mach-s3c24xx / mach-gta02.c
1 /*
2  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
3  *
4  * Copyright (C) 2006-2009 by Openmoko, Inc.
5  * Authors: Harald Welte <laforge@openmoko.org>
6  *          Andy Green <andy@openmoko.org>
7  *          Werner Almesberger <werner@openmoko.org>
8  * All rights reserved.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28 #include <linux/interrupt.h>
29 #include <linux/list.h>
30 #include <linux/delay.h>
31 #include <linux/timer.h>
32 #include <linux/init.h>
33 #include <linux/gpio.h>
34 #include <linux/gpio_keys.h>
35 #include <linux/workqueue.h>
36 #include <linux/platform_device.h>
37 #include <linux/serial_core.h>
38 #include <linux/input.h>
39 #include <linux/io.h>
40 #include <linux/i2c.h>
41
42 #include <linux/mmc/host.h>
43
44 #include <linux/mfd/pcf50633/adc.h>
45 #include <linux/mfd/pcf50633/backlight.h>
46 #include <linux/mfd/pcf50633/core.h>
47 #include <linux/mfd/pcf50633/gpio.h>
48 #include <linux/mfd/pcf50633/mbc.h>
49 #include <linux/mfd/pcf50633/pmic.h>
50
51 #include <linux/mtd/mtd.h>
52 #include <linux/mtd/nand.h>
53 #include <linux/mtd/nand_ecc.h>
54 #include <linux/mtd/partitions.h>
55 #include <linux/mtd/physmap.h>
56
57 #include <linux/regulator/machine.h>
58
59 #include <linux/spi/spi.h>
60 #include <linux/spi/s3c24xx.h>
61
62 #include <asm/irq.h>
63 #include <asm/mach-types.h>
64 #include <asm/mach/arch.h>
65 #include <asm/mach/map.h>
66 #include <asm/mach/irq.h>
67
68 #include <linux/platform_data/i2c-s3c2410.h>
69 #include <linux/platform_data/mtd-nand-s3c2410.h>
70 #include <linux/platform_data/touchscreen-s3c2410.h>
71 #include <linux/platform_data/usb-ohci-s3c2410.h>
72 #include <linux/platform_data/usb-s3c2410_udc.h>
73
74 #include <mach/fb.h>
75 #include <mach/hardware.h>
76 #include <mach/regs-gpio.h>
77 #include <mach/regs-irq.h>
78
79 #include <plat/cpu.h>
80 #include <plat/devs.h>
81 #include <plat/gpio-cfg.h>
82 #include <plat/pm.h>
83 #include <plat/regs-serial.h>
84
85 #include "common.h"
86 #include "gta02.h"
87
88 static struct pcf50633 *gta02_pcf;
89
90 /*
91  * This gets called frequently when we paniced.
92  */
93
94 static long gta02_panic_blink(int state)
95 {
96         long delay = 0;
97         char led;
98
99         led = (state) ? 1 : 0;
100         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
101
102         return delay;
103 }
104
105
106 static struct map_desc gta02_iodesc[] __initdata = {
107         {
108                 .virtual        = 0xe0000000,
109                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
110                 .length         = SZ_1M,
111                 .type           = MT_DEVICE
112         },
113 };
114
115 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
116 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
117 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
118
119 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
120         [0] = {
121                 .hwport         = 0,
122                 .flags          = 0,
123                 .ucon           = UCON,
124                 .ulcon          = ULCON,
125                 .ufcon          = UFCON,
126         },
127         [1] = {
128                 .hwport         = 1,
129                 .flags          = 0,
130                 .ucon           = UCON,
131                 .ulcon          = ULCON,
132                 .ufcon          = UFCON,
133         },
134         [2] = {
135                 .hwport         = 2,
136                 .flags          = 0,
137                 .ucon           = UCON,
138                 .ulcon          = ULCON,
139                 .ufcon          = UFCON,
140         },
141 };
142
143 #ifdef CONFIG_CHARGER_PCF50633
144 /*
145  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
146  * We use this to recognize that we can pull 1A from the USB socket.
147  *
148  * These constants are the measured pcf50633 ADC levels with the 1A
149  * charger / 48K resistor, and with no pulldown resistor.
150  */
151
152 #define ADC_NOM_CHG_DETECT_1A 6
153 #define ADC_NOM_CHG_DETECT_USB 43
154
155 static void
156 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
157 {
158         int  ma;
159
160         /* Interpret charger type */
161         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
162
163                 /*
164                  * Sanity - stop GPO driving out now that we have a 1A charger
165                  * GPO controls USB Host power generation on GTA02
166                  */
167                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
168
169                 ma = 1000;
170         } else
171                 ma = 100;
172
173         pcf50633_mbc_usb_curlim_set(pcf, ma);
174 }
175
176 static struct delayed_work gta02_charger_work;
177 static int gta02_usb_vbus_draw;
178
179 static void gta02_charger_worker(struct work_struct *work)
180 {
181         if (gta02_usb_vbus_draw) {
182                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
183                 return;
184         }
185
186 #ifdef CONFIG_PCF50633_ADC
187         pcf50633_adc_async_read(gta02_pcf,
188                                 PCF50633_ADCC1_MUX_ADCIN1,
189                                 PCF50633_ADCC1_AVERAGE_16,
190                                 gta02_configure_pmu_for_charger,
191                                 NULL);
192 #else
193         /*
194          * If the PCF50633 ADC is disabled we fallback to a
195          * 100mA limit for safety.
196          */
197         pcf50633_mbc_usb_curlim_set(pcf, 100);
198 #endif
199 }
200
201 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
202
203 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
204 {
205         if (irq == PCF50633_IRQ_USBINS) {
206                 schedule_delayed_work(&gta02_charger_work,
207                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
208
209                 return;
210         }
211
212         if (irq == PCF50633_IRQ_USBREM) {
213                 cancel_delayed_work_sync(&gta02_charger_work);
214                 gta02_usb_vbus_draw = 0;
215         }
216 }
217
218 static void gta02_udc_vbus_draw(unsigned int ma)
219 {
220         if (!gta02_pcf)
221                 return;
222
223         gta02_usb_vbus_draw = ma;
224
225         schedule_delayed_work(&gta02_charger_work,
226                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
227 }
228 #else /* !CONFIG_CHARGER_PCF50633 */
229 #define gta02_pmu_event_callback        NULL
230 #define gta02_udc_vbus_draw             NULL
231 #endif
232
233 /*
234  * This is called when pc50633 is probed, unfortunately quite late in the
235  * day since it is an I2C bus device. Here we can belatedly define some
236  * platform devices with the advantage that we can mark the pcf50633 as the
237  * parent. This makes them get suspended and resumed with their parent
238  * the pcf50633 still around.
239  */
240
241 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
242
243
244 static char *gta02_batteries[] = {
245         "battery",
246 };
247
248 static struct pcf50633_bl_platform_data gta02_backlight_data = {
249         .default_brightness = 0x3f,
250         .default_brightness_limit = 0,
251         .ramp_time = 5,
252 };
253
254 static struct pcf50633_platform_data gta02_pcf_pdata = {
255         .resumers = {
256                 [0] =   PCF50633_INT1_USBINS |
257                         PCF50633_INT1_USBREM |
258                         PCF50633_INT1_ALARM,
259                 [1] =   PCF50633_INT2_ONKEYF,
260                 [2] =   PCF50633_INT3_ONKEY1S,
261                 [3] =   PCF50633_INT4_LOWSYS |
262                         PCF50633_INT4_LOWBAT |
263                         PCF50633_INT4_HIGHTMP,
264         },
265
266         .batteries = gta02_batteries,
267         .num_batteries = ARRAY_SIZE(gta02_batteries),
268
269         .charger_reference_current_ma = 1000,
270
271         .backlight_data = &gta02_backlight_data,
272
273         .reg_init_data = {
274                 [PCF50633_REGULATOR_AUTO] = {
275                         .constraints = {
276                                 .min_uV = 3300000,
277                                 .max_uV = 3300000,
278                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
279                                 .always_on = 1,
280                                 .apply_uV = 1,
281                         },
282                 },
283                 [PCF50633_REGULATOR_DOWN1] = {
284                         .constraints = {
285                                 .min_uV = 1300000,
286                                 .max_uV = 1600000,
287                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
288                                 .always_on = 1,
289                                 .apply_uV = 1,
290                         },
291                 },
292                 [PCF50633_REGULATOR_DOWN2] = {
293                         .constraints = {
294                                 .min_uV = 1800000,
295                                 .max_uV = 1800000,
296                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
297                                 .apply_uV = 1,
298                                 .always_on = 1,
299                         },
300                 },
301                 [PCF50633_REGULATOR_HCLDO] = {
302                         .constraints = {
303                                 .min_uV = 2000000,
304                                 .max_uV = 3300000,
305                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
306                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
307                                                 REGULATOR_CHANGE_STATUS,
308                         },
309                 },
310                 [PCF50633_REGULATOR_LDO1] = {
311                         .constraints = {
312                                 .min_uV = 3300000,
313                                 .max_uV = 3300000,
314                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
315                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
316                                 .apply_uV = 1,
317                         },
318                 },
319                 [PCF50633_REGULATOR_LDO2] = {
320                         .constraints = {
321                                 .min_uV = 3300000,
322                                 .max_uV = 3300000,
323                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
324                                 .apply_uV = 1,
325                         },
326                 },
327                 [PCF50633_REGULATOR_LDO3] = {
328                         .constraints = {
329                                 .min_uV = 3000000,
330                                 .max_uV = 3000000,
331                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
332                                 .apply_uV = 1,
333                         },
334                 },
335                 [PCF50633_REGULATOR_LDO4] = {
336                         .constraints = {
337                                 .min_uV = 3200000,
338                                 .max_uV = 3200000,
339                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
340                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
341                                 .apply_uV = 1,
342                         },
343                 },
344                 [PCF50633_REGULATOR_LDO5] = {
345                         .constraints = {
346                                 .min_uV = 3000000,
347                                 .max_uV = 3000000,
348                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
349                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
350                                 .apply_uV = 1,
351                         },
352                 },
353                 [PCF50633_REGULATOR_LDO6] = {
354                         .constraints = {
355                                 .min_uV = 3000000,
356                                 .max_uV = 3000000,
357                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
358                         },
359                 },
360                 [PCF50633_REGULATOR_MEMLDO] = {
361                         .constraints = {
362                                 .min_uV = 1800000,
363                                 .max_uV = 1800000,
364                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
365                         },
366                 },
367
368         },
369         .probe_done = gta02_pmu_attach_child_devices,
370         .mbc_event_callback = gta02_pmu_event_callback,
371 };
372
373
374 /* NOR Flash. */
375
376 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
377 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
378
379 static struct physmap_flash_data gta02_nor_flash_data = {
380         .width          = 2,
381 };
382
383 static struct resource gta02_nor_flash_resource =
384         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
385
386 static struct platform_device gta02_nor_flash = {
387         .name           = "physmap-flash",
388         .id             = 0,
389         .dev            = {
390                 .platform_data  = &gta02_nor_flash_data,
391         },
392         .resource       = &gta02_nor_flash_resource,
393         .num_resources  = 1,
394 };
395
396
397 static struct platform_device s3c24xx_pwm_device = {
398         .name           = "s3c24xx_pwm",
399         .num_resources  = 0,
400 };
401
402 static struct platform_device gta02_dfbmcs320_device = {
403         .name = "dfbmcs320",
404 };
405
406 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
407         {
408                 I2C_BOARD_INFO("pcf50633", 0x73),
409                 .irq = GTA02_IRQ_PCF50633,
410                 .platform_data = &gta02_pcf_pdata,
411         },
412         {
413                 I2C_BOARD_INFO("wm8753", 0x1a),
414         },
415 };
416
417 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
418         [0] = {
419                 /*
420                  * This name is also hard-coded in the boot loaders, so
421                  * changing it would would require all users to upgrade
422                  * their boot loaders, some of which are stored in a NOR
423                  * that is considered to be immutable.
424                  */
425                 .name           = "neo1973-nand",
426                 .nr_chips       = 1,
427                 .flash_bbt      = 1,
428         },
429 };
430
431 /*
432  * Choose a set of timings derived from S3C@2442B MCP54
433  * data sheet (K5D2G13ACM-D075 MCP Memory).
434  */
435
436 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
437         .tacls          = 0,
438         .twrph0         = 25,
439         .twrph1         = 15,
440         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
441         .sets           = gta02_nand_sets,
442 };
443
444
445 /* Get PMU to set USB current limit accordingly. */
446 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
447         .vbus_draw      = gta02_udc_vbus_draw,
448         .pullup_pin = GTA02_GPIO_USB_PULLUP,
449 };
450
451 /* USB */
452 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
453         .port[0]        = {
454                 .flags  = S3C_HCDFLG_USED,
455         },
456         .port[1]        = {
457                 .flags  = 0,
458         },
459 };
460
461 /* Touchscreen */
462 static struct s3c2410_ts_mach_info gta02_ts_info = {
463         .delay                  = 10000,
464         .presc                  = 0xff, /* slow as we can go */
465         .oversampling_shift     = 2,
466 };
467
468 /* Buttons */
469 static struct gpio_keys_button gta02_buttons[] = {
470         {
471                 .gpio = GTA02_GPIO_AUX_KEY,
472                 .code = KEY_PHONE,
473                 .desc = "Aux",
474                 .type = EV_KEY,
475                 .debounce_interval = 100,
476         },
477         {
478                 .gpio = GTA02_GPIO_HOLD_KEY,
479                 .code = KEY_PAUSE,
480                 .desc = "Hold",
481                 .type = EV_KEY,
482                 .debounce_interval = 100,
483         },
484 };
485
486 static struct gpio_keys_platform_data gta02_buttons_pdata = {
487         .buttons = gta02_buttons,
488         .nbuttons = ARRAY_SIZE(gta02_buttons),
489 };
490
491 static struct platform_device gta02_buttons_device = {
492         .name = "gpio-keys",
493         .id = -1,
494         .dev = {
495                 .platform_data = &gta02_buttons_pdata,
496         },
497 };
498
499 static void __init gta02_map_io(void)
500 {
501         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
502         s3c24xx_init_clocks(12000000);
503         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
504 }
505
506
507 /* These are the guys that don't need to be children of PMU. */
508
509 static struct platform_device *gta02_devices[] __initdata = {
510         &s3c_device_ohci,
511         &s3c_device_wdt,
512         &s3c_device_sdi,
513         &s3c_device_usbgadget,
514         &s3c_device_nand,
515         &gta02_nor_flash,
516         &s3c24xx_pwm_device,
517         &s3c_device_iis,
518         &s3c_device_i2c0,
519         &gta02_dfbmcs320_device,
520         &gta02_buttons_device,
521         &s3c_device_adc,
522         &s3c_device_ts,
523 };
524
525 /* These guys DO need to be children of PMU. */
526
527 static struct platform_device *gta02_devices_pmu_children[] = {
528 };
529
530
531 /*
532  * This is called when pc50633 is probed, quite late in the day since it is an
533  * I2C bus device.  Here we can define platform devices with the advantage that
534  * we can mark the pcf50633 as the parent.  This makes them get suspended and
535  * resumed with their parent the pcf50633 still around.  All devices whose
536  * operation depends on something from pcf50633 must have this relationship
537  * made explicit like this, or suspend and resume will become an unreliable
538  * hellworld.
539  */
540
541 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
542 {
543         int n;
544
545         /* Grab a copy of the now probed PMU pointer. */
546         gta02_pcf = pcf;
547
548         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
549                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
550
551         platform_add_devices(gta02_devices_pmu_children,
552                              ARRAY_SIZE(gta02_devices_pmu_children));
553 }
554
555 static void gta02_poweroff(void)
556 {
557         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
558 }
559
560 static void __init gta02_machine_init(void)
561 {
562         /* Set the panic callback to turn AUX LED on or off. */
563         panic_blink = gta02_panic_blink;
564
565         s3c_pm_init();
566
567 #ifdef CONFIG_CHARGER_PCF50633
568         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
569 #endif
570
571         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
572         s3c24xx_ts_set_platdata(&gta02_ts_info);
573         s3c_ohci_set_platdata(&gta02_usb_info);
574         s3c_nand_set_platdata(&gta02_nand_info);
575         s3c_i2c0_set_platdata(NULL);
576
577         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
578
579         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
580         pm_power_off = gta02_poweroff;
581
582         regulator_has_full_constraints();
583 }
584
585
586 MACHINE_START(NEO1973_GTA02, "GTA02")
587         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
588         .atag_offset    = 0x100,
589         .map_io         = gta02_map_io,
590         .init_irq       = s3c24xx_init_irq,
591         .init_machine   = gta02_machine_init,
592         .init_time      = s3c24xx_timer_init,
593         .restart        = s3c244x_restart,
594 MACHINE_END