Merge tag 'v3.15-rc1' into perf/urgent
[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/serial_s3c.h>
39 #include <linux/input.h>
40 #include <linux/io.h>
41 #include <linux/i2c.h>
42
43 #include <linux/mmc/host.h>
44
45 #include <linux/mfd/pcf50633/adc.h>
46 #include <linux/mfd/pcf50633/backlight.h>
47 #include <linux/mfd/pcf50633/core.h>
48 #include <linux/mfd/pcf50633/gpio.h>
49 #include <linux/mfd/pcf50633/mbc.h>
50 #include <linux/mfd/pcf50633/pmic.h>
51
52 #include <linux/mtd/mtd.h>
53 #include <linux/mtd/nand.h>
54 #include <linux/mtd/nand_ecc.h>
55 #include <linux/mtd/partitions.h>
56 #include <linux/mtd/physmap.h>
57
58 #include <linux/regulator/machine.h>
59
60 #include <linux/spi/spi.h>
61 #include <linux/spi/s3c24xx.h>
62
63 #include <asm/irq.h>
64 #include <asm/mach-types.h>
65 #include <asm/mach/arch.h>
66 #include <asm/mach/map.h>
67 #include <asm/mach/irq.h>
68
69 #include <linux/platform_data/i2c-s3c2410.h>
70 #include <linux/platform_data/mtd-nand-s3c2410.h>
71 #include <linux/platform_data/touchscreen-s3c2410.h>
72 #include <linux/platform_data/usb-ohci-s3c2410.h>
73 #include <linux/platform_data/usb-s3c2410_udc.h>
74
75 #include <mach/fb.h>
76 #include <mach/hardware.h>
77 #include <mach/regs-gpio.h>
78 #include <mach/regs-irq.h>
79 #include <mach/gpio-samsung.h>
80
81 #include <plat/cpu.h>
82 #include <plat/devs.h>
83 #include <plat/gpio-cfg.h>
84 #include <plat/pm.h>
85 #include <plat/samsung-time.h>
86
87 #include "common.h"
88 #include "gta02.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(gta02_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 static 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                         },
284                 },
285                 [PCF50633_REGULATOR_DOWN1] = {
286                         .constraints = {
287                                 .min_uV = 1300000,
288                                 .max_uV = 1600000,
289                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
290                                 .always_on = 1,
291                                 .apply_uV = 1,
292                         },
293                 },
294                 [PCF50633_REGULATOR_DOWN2] = {
295                         .constraints = {
296                                 .min_uV = 1800000,
297                                 .max_uV = 1800000,
298                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
299                                 .apply_uV = 1,
300                                 .always_on = 1,
301                         },
302                 },
303                 [PCF50633_REGULATOR_HCLDO] = {
304                         .constraints = {
305                                 .min_uV = 2000000,
306                                 .max_uV = 3300000,
307                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
308                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
309                                                 REGULATOR_CHANGE_STATUS,
310                         },
311                 },
312                 [PCF50633_REGULATOR_LDO1] = {
313                         .constraints = {
314                                 .min_uV = 3300000,
315                                 .max_uV = 3300000,
316                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
317                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
318                                 .apply_uV = 1,
319                         },
320                 },
321                 [PCF50633_REGULATOR_LDO2] = {
322                         .constraints = {
323                                 .min_uV = 3300000,
324                                 .max_uV = 3300000,
325                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
326                                 .apply_uV = 1,
327                         },
328                 },
329                 [PCF50633_REGULATOR_LDO3] = {
330                         .constraints = {
331                                 .min_uV = 3000000,
332                                 .max_uV = 3000000,
333                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
334                                 .apply_uV = 1,
335                         },
336                 },
337                 [PCF50633_REGULATOR_LDO4] = {
338                         .constraints = {
339                                 .min_uV = 3200000,
340                                 .max_uV = 3200000,
341                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
342                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
343                                 .apply_uV = 1,
344                         },
345                 },
346                 [PCF50633_REGULATOR_LDO5] = {
347                         .constraints = {
348                                 .min_uV = 3000000,
349                                 .max_uV = 3000000,
350                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
351                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
352                                 .apply_uV = 1,
353                         },
354                 },
355                 [PCF50633_REGULATOR_LDO6] = {
356                         .constraints = {
357                                 .min_uV = 3000000,
358                                 .max_uV = 3000000,
359                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
360                         },
361                 },
362                 [PCF50633_REGULATOR_MEMLDO] = {
363                         .constraints = {
364                                 .min_uV = 1800000,
365                                 .max_uV = 1800000,
366                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
367                         },
368                 },
369
370         },
371         .probe_done = gta02_pmu_attach_child_devices,
372         .mbc_event_callback = gta02_pmu_event_callback,
373 };
374
375
376 /* NOR Flash. */
377
378 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
379 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
380
381 static struct physmap_flash_data gta02_nor_flash_data = {
382         .width          = 2,
383 };
384
385 static struct resource gta02_nor_flash_resource =
386         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
387
388 static struct platform_device gta02_nor_flash = {
389         .name           = "physmap-flash",
390         .id             = 0,
391         .dev            = {
392                 .platform_data  = &gta02_nor_flash_data,
393         },
394         .resource       = &gta02_nor_flash_resource,
395         .num_resources  = 1,
396 };
397
398
399 static struct platform_device s3c24xx_pwm_device = {
400         .name           = "s3c24xx_pwm",
401         .num_resources  = 0,
402 };
403
404 static struct platform_device gta02_dfbmcs320_device = {
405         .name = "dfbmcs320",
406 };
407
408 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
409         {
410                 I2C_BOARD_INFO("pcf50633", 0x73),
411                 .irq = GTA02_IRQ_PCF50633,
412                 .platform_data = &gta02_pcf_pdata,
413         },
414         {
415                 I2C_BOARD_INFO("wm8753", 0x1a),
416         },
417 };
418
419 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
420         [0] = {
421                 /*
422                  * This name is also hard-coded in the boot loaders, so
423                  * changing it would would require all users to upgrade
424                  * their boot loaders, some of which are stored in a NOR
425                  * that is considered to be immutable.
426                  */
427                 .name           = "neo1973-nand",
428                 .nr_chips       = 1,
429                 .flash_bbt      = 1,
430         },
431 };
432
433 /*
434  * Choose a set of timings derived from S3C@2442B MCP54
435  * data sheet (K5D2G13ACM-D075 MCP Memory).
436  */
437
438 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
439         .tacls          = 0,
440         .twrph0         = 25,
441         .twrph1         = 15,
442         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
443         .sets           = gta02_nand_sets,
444 };
445
446
447 /* Get PMU to set USB current limit accordingly. */
448 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
449         .vbus_draw      = gta02_udc_vbus_draw,
450         .pullup_pin = GTA02_GPIO_USB_PULLUP,
451 };
452
453 /* USB */
454 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
455         .port[0]        = {
456                 .flags  = S3C_HCDFLG_USED,
457         },
458         .port[1]        = {
459                 .flags  = 0,
460         },
461 };
462
463 /* Touchscreen */
464 static struct s3c2410_ts_mach_info gta02_ts_info = {
465         .delay                  = 10000,
466         .presc                  = 0xff, /* slow as we can go */
467         .oversampling_shift     = 2,
468 };
469
470 /* Buttons */
471 static struct gpio_keys_button gta02_buttons[] = {
472         {
473                 .gpio = GTA02_GPIO_AUX_KEY,
474                 .code = KEY_PHONE,
475                 .desc = "Aux",
476                 .type = EV_KEY,
477                 .debounce_interval = 100,
478         },
479         {
480                 .gpio = GTA02_GPIO_HOLD_KEY,
481                 .code = KEY_PAUSE,
482                 .desc = "Hold",
483                 .type = EV_KEY,
484                 .debounce_interval = 100,
485         },
486 };
487
488 static struct gpio_keys_platform_data gta02_buttons_pdata = {
489         .buttons = gta02_buttons,
490         .nbuttons = ARRAY_SIZE(gta02_buttons),
491 };
492
493 static struct platform_device gta02_buttons_device = {
494         .name = "gpio-keys",
495         .id = -1,
496         .dev = {
497                 .platform_data = &gta02_buttons_pdata,
498         },
499 };
500
501 static void __init gta02_map_io(void)
502 {
503         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
504         s3c24xx_init_clocks(12000000);
505         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
506         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
507 }
508
509
510 /* These are the guys that don't need to be children of PMU. */
511
512 static struct platform_device *gta02_devices[] __initdata = {
513         &s3c_device_ohci,
514         &s3c_device_wdt,
515         &s3c_device_sdi,
516         &s3c_device_usbgadget,
517         &s3c_device_nand,
518         &gta02_nor_flash,
519         &s3c24xx_pwm_device,
520         &s3c_device_iis,
521         &s3c_device_i2c0,
522         &gta02_dfbmcs320_device,
523         &gta02_buttons_device,
524         &s3c_device_adc,
525         &s3c_device_ts,
526 };
527
528 /* These guys DO need to be children of PMU. */
529
530 static struct platform_device *gta02_devices_pmu_children[] = {
531 };
532
533
534 /*
535  * This is called when pc50633 is probed, quite late in the day since it is an
536  * I2C bus device.  Here we can define platform devices with the advantage that
537  * we can mark the pcf50633 as the parent.  This makes them get suspended and
538  * resumed with their parent the pcf50633 still around.  All devices whose
539  * operation depends on something from pcf50633 must have this relationship
540  * made explicit like this, or suspend and resume will become an unreliable
541  * hellworld.
542  */
543
544 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
545 {
546         int n;
547
548         /* Grab a copy of the now probed PMU pointer. */
549         gta02_pcf = pcf;
550
551         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
552                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
553
554         platform_add_devices(gta02_devices_pmu_children,
555                              ARRAY_SIZE(gta02_devices_pmu_children));
556 }
557
558 static void gta02_poweroff(void)
559 {
560         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
561 }
562
563 static void __init gta02_machine_init(void)
564 {
565         /* Set the panic callback to turn AUX LED on or off. */
566         panic_blink = gta02_panic_blink;
567
568         s3c_pm_init();
569
570 #ifdef CONFIG_CHARGER_PCF50633
571         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
572 #endif
573
574         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
575         s3c24xx_ts_set_platdata(&gta02_ts_info);
576         s3c_ohci_set_platdata(&gta02_usb_info);
577         s3c_nand_set_platdata(&gta02_nand_info);
578         s3c_i2c0_set_platdata(NULL);
579
580         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
581
582         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
583         pm_power_off = gta02_poweroff;
584
585         regulator_has_full_constraints();
586 }
587
588
589 MACHINE_START(NEO1973_GTA02, "GTA02")
590         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
591         .atag_offset    = 0x100,
592         .map_io         = gta02_map_io,
593         .init_irq       = s3c2442_init_irq,
594         .init_machine   = gta02_machine_init,
595         .init_time      = samsung_timer_init,
596         .restart        = s3c244x_restart,
597 MACHINE_END