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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-s3c24xx/mach-gta02.c

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  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 #ifdef CONFIG_PCF50633_ADC
158 static void
159 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
160 {
161         int  ma;
162 
163         /* Interpret charger type */
164         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
165 
166                 /*
167                  * Sanity - stop GPO driving out now that we have a 1A charger
168                  * GPO controls USB Host power generation on GTA02
169                  */
170                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
171 
172                 ma = 1000;
173         } else
174                 ma = 100;
175 
176         pcf50633_mbc_usb_curlim_set(pcf, ma);
177 }
178 #endif
179 
180 static struct delayed_work gta02_charger_work;
181 static int gta02_usb_vbus_draw;
182 
183 static void gta02_charger_worker(struct work_struct *work)
184 {
185         if (gta02_usb_vbus_draw) {
186                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
187                 return;
188         }
189 
190 #ifdef CONFIG_PCF50633_ADC
191         pcf50633_adc_async_read(gta02_pcf,
192                                 PCF50633_ADCC1_MUX_ADCIN1,
193                                 PCF50633_ADCC1_AVERAGE_16,
194                                 gta02_configure_pmu_for_charger,
195                                 NULL);
196 #else
197         /*
198          * If the PCF50633 ADC is disabled we fallback to a
199          * 100mA limit for safety.
200          */
201         pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
202 #endif
203 }
204 
205 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
206 
207 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
208 {
209         if (irq == PCF50633_IRQ_USBINS) {
210                 schedule_delayed_work(&gta02_charger_work,
211                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
212 
213                 return;
214         }
215 
216         if (irq == PCF50633_IRQ_USBREM) {
217                 cancel_delayed_work_sync(&gta02_charger_work);
218                 gta02_usb_vbus_draw = 0;
219         }
220 }
221 
222 static void gta02_udc_vbus_draw(unsigned int ma)
223 {
224         if (!gta02_pcf)
225                 return;
226 
227         gta02_usb_vbus_draw = ma;
228 
229         schedule_delayed_work(&gta02_charger_work,
230                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
231 }
232 #else /* !CONFIG_CHARGER_PCF50633 */
233 #define gta02_pmu_event_callback        NULL
234 #define gta02_udc_vbus_draw             NULL
235 #endif
236 
237 /*
238  * This is called when pc50633 is probed, unfortunately quite late in the
239  * day since it is an I2C bus device. Here we can belatedly define some
240  * platform devices with the advantage that we can mark the pcf50633 as the
241  * parent. This makes them get suspended and resumed with their parent
242  * the pcf50633 still around.
243  */
244 
245 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
246 
247 
248 static char *gta02_batteries[] = {
249         "battery",
250 };
251 
252 static struct pcf50633_bl_platform_data gta02_backlight_data = {
253         .default_brightness = 0x3f,
254         .default_brightness_limit = 0,
255         .ramp_time = 5,
256 };
257 
258 static struct pcf50633_platform_data gta02_pcf_pdata = {
259         .resumers = {
260                 [0] =   PCF50633_INT1_USBINS |
261                         PCF50633_INT1_USBREM |
262                         PCF50633_INT1_ALARM,
263                 [1] =   PCF50633_INT2_ONKEYF,
264                 [2] =   PCF50633_INT3_ONKEY1S,
265                 [3] =   PCF50633_INT4_LOWSYS |
266                         PCF50633_INT4_LOWBAT |
267                         PCF50633_INT4_HIGHTMP,
268         },
269 
270         .batteries = gta02_batteries,
271         .num_batteries = ARRAY_SIZE(gta02_batteries),
272 
273         .charger_reference_current_ma = 1000,
274 
275         .backlight_data = &gta02_backlight_data,
276 
277         .reg_init_data = {
278                 [PCF50633_REGULATOR_AUTO] = {
279                         .constraints = {
280                                 .min_uV = 3300000,
281                                 .max_uV = 3300000,
282                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
283                                 .always_on = 1,
284                                 .apply_uV = 1,
285                         },
286                 },
287                 [PCF50633_REGULATOR_DOWN1] = {
288                         .constraints = {
289                                 .min_uV = 1300000,
290                                 .max_uV = 1600000,
291                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
292                                 .always_on = 1,
293                                 .apply_uV = 1,
294                         },
295                 },
296                 [PCF50633_REGULATOR_DOWN2] = {
297                         .constraints = {
298                                 .min_uV = 1800000,
299                                 .max_uV = 1800000,
300                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
301                                 .apply_uV = 1,
302                                 .always_on = 1,
303                         },
304                 },
305                 [PCF50633_REGULATOR_HCLDO] = {
306                         .constraints = {
307                                 .min_uV = 2000000,
308                                 .max_uV = 3300000,
309                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
310                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
311                                                 REGULATOR_CHANGE_STATUS,
312                         },
313                 },
314                 [PCF50633_REGULATOR_LDO1] = {
315                         .constraints = {
316                                 .min_uV = 3300000,
317                                 .max_uV = 3300000,
318                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
319                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
320                                 .apply_uV = 1,
321                         },
322                 },
323                 [PCF50633_REGULATOR_LDO2] = {
324                         .constraints = {
325                                 .min_uV = 3300000,
326                                 .max_uV = 3300000,
327                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
328                                 .apply_uV = 1,
329                         },
330                 },
331                 [PCF50633_REGULATOR_LDO3] = {
332                         .constraints = {
333                                 .min_uV = 3000000,
334                                 .max_uV = 3000000,
335                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
336                                 .apply_uV = 1,
337                         },
338                 },
339                 [PCF50633_REGULATOR_LDO4] = {
340                         .constraints = {
341                                 .min_uV = 3200000,
342                                 .max_uV = 3200000,
343                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
344                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
345                                 .apply_uV = 1,
346                         },
347                 },
348                 [PCF50633_REGULATOR_LDO5] = {
349                         .constraints = {
350                                 .min_uV = 3000000,
351                                 .max_uV = 3000000,
352                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
353                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
354                                 .apply_uV = 1,
355                         },
356                 },
357                 [PCF50633_REGULATOR_LDO6] = {
358                         .constraints = {
359                                 .min_uV = 3000000,
360                                 .max_uV = 3000000,
361                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
362                         },
363                 },
364                 [PCF50633_REGULATOR_MEMLDO] = {
365                         .constraints = {
366                                 .min_uV = 1800000,
367                                 .max_uV = 1800000,
368                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
369                         },
370                 },
371 
372         },
373         .probe_done = gta02_pmu_attach_child_devices,
374         .mbc_event_callback = gta02_pmu_event_callback,
375 };
376 
377 
378 /* NOR Flash. */
379 
380 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
381 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
382 
383 static struct physmap_flash_data gta02_nor_flash_data = {
384         .width          = 2,
385 };
386 
387 static struct resource gta02_nor_flash_resource =
388         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
389 
390 static struct platform_device gta02_nor_flash = {
391         .name           = "physmap-flash",
392         .id             = 0,
393         .dev            = {
394                 .platform_data  = &gta02_nor_flash_data,
395         },
396         .resource       = &gta02_nor_flash_resource,
397         .num_resources  = 1,
398 };
399 
400 
401 static struct platform_device s3c24xx_pwm_device = {
402         .name           = "s3c24xx_pwm",
403         .num_resources  = 0,
404 };
405 
406 static struct platform_device gta02_dfbmcs320_device = {
407         .name = "dfbmcs320",
408 };
409 
410 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
411         {
412                 I2C_BOARD_INFO("pcf50633", 0x73),
413                 .irq = GTA02_IRQ_PCF50633,
414                 .platform_data = &gta02_pcf_pdata,
415         },
416         {
417                 I2C_BOARD_INFO("wm8753", 0x1a),
418         },
419 };
420 
421 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
422         [0] = {
423                 /*
424                  * This name is also hard-coded in the boot loaders, so
425                  * changing it would would require all users to upgrade
426                  * their boot loaders, some of which are stored in a NOR
427                  * that is considered to be immutable.
428                  */
429                 .name           = "neo1973-nand",
430                 .nr_chips       = 1,
431                 .flash_bbt      = 1,
432         },
433 };
434 
435 /*
436  * Choose a set of timings derived from S3C@2442B MCP54
437  * data sheet (K5D2G13ACM-D075 MCP Memory).
438  */
439 
440 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
441         .tacls          = 0,
442         .twrph0         = 25,
443         .twrph1         = 15,
444         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
445         .sets           = gta02_nand_sets,
446         .ecc_mode       = NAND_ECC_SOFT,
447 };
448 
449 
450 /* Get PMU to set USB current limit accordingly. */
451 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
452         .vbus_draw      = gta02_udc_vbus_draw,
453         .pullup_pin = GTA02_GPIO_USB_PULLUP,
454 };
455 
456 /* USB */
457 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
458         .port[0]        = {
459                 .flags  = S3C_HCDFLG_USED,
460         },
461         .port[1]        = {
462                 .flags  = 0,
463         },
464 };
465 
466 /* Touchscreen */
467 static struct s3c2410_ts_mach_info gta02_ts_info = {
468         .delay                  = 10000,
469         .presc                  = 0xff, /* slow as we can go */
470         .oversampling_shift     = 2,
471 };
472 
473 /* Buttons */
474 static struct gpio_keys_button gta02_buttons[] = {
475         {
476                 .gpio = GTA02_GPIO_AUX_KEY,
477                 .code = KEY_PHONE,
478                 .desc = "Aux",
479                 .type = EV_KEY,
480                 .debounce_interval = 100,
481         },
482         {
483                 .gpio = GTA02_GPIO_HOLD_KEY,
484                 .code = KEY_PAUSE,
485                 .desc = "Hold",
486                 .type = EV_KEY,
487                 .debounce_interval = 100,
488         },
489 };
490 
491 static struct gpio_keys_platform_data gta02_buttons_pdata = {
492         .buttons = gta02_buttons,
493         .nbuttons = ARRAY_SIZE(gta02_buttons),
494 };
495 
496 static struct platform_device gta02_buttons_device = {
497         .name = "gpio-keys",
498         .id = -1,
499         .dev = {
500                 .platform_data = &gta02_buttons_pdata,
501         },
502 };
503 
504 static void __init gta02_map_io(void)
505 {
506         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
507         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
508         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
509 }
510 
511 
512 /* These are the guys that don't need to be children of PMU. */
513 
514 static struct platform_device *gta02_devices[] __initdata = {
515         &s3c_device_ohci,
516         &s3c_device_wdt,
517         &s3c_device_sdi,
518         &s3c_device_usbgadget,
519         &s3c_device_nand,
520         &gta02_nor_flash,
521         &s3c24xx_pwm_device,
522         &s3c_device_iis,
523         &s3c_device_i2c0,
524         &gta02_dfbmcs320_device,
525         &gta02_buttons_device,
526         &s3c_device_adc,
527         &s3c_device_ts,
528 };
529 
530 /* These guys DO need to be children of PMU. */
531 
532 static struct platform_device *gta02_devices_pmu_children[] = {
533 };
534 
535 
536 /*
537  * This is called when pc50633 is probed, quite late in the day since it is an
538  * I2C bus device.  Here we can define platform devices with the advantage that
539  * we can mark the pcf50633 as the parent.  This makes them get suspended and
540  * resumed with their parent the pcf50633 still around.  All devices whose
541  * operation depends on something from pcf50633 must have this relationship
542  * made explicit like this, or suspend and resume will become an unreliable
543  * hellworld.
544  */
545 
546 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
547 {
548         int n;
549 
550         /* Grab a copy of the now probed PMU pointer. */
551         gta02_pcf = pcf;
552 
553         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
554                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
555 
556         platform_add_devices(gta02_devices_pmu_children,
557                              ARRAY_SIZE(gta02_devices_pmu_children));
558 }
559 
560 static void gta02_poweroff(void)
561 {
562         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
563 }
564 
565 static void __init gta02_machine_init(void)
566 {
567         /* Set the panic callback to turn AUX LED on or off. */
568         panic_blink = gta02_panic_blink;
569 
570         s3c_pm_init();
571 
572 #ifdef CONFIG_CHARGER_PCF50633
573         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
574 #endif
575 
576         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
577         s3c24xx_ts_set_platdata(&gta02_ts_info);
578         s3c_ohci_set_platdata(&gta02_usb_info);
579         s3c_nand_set_platdata(&gta02_nand_info);
580         s3c_i2c0_set_platdata(NULL);
581 
582         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
583 
584         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
585         pm_power_off = gta02_poweroff;
586 
587         regulator_has_full_constraints();
588 }
589 
590 static void __init gta02_init_time(void)
591 {
592         s3c2442_init_clocks(12000000);
593         samsung_timer_init();
594 }
595 
596 MACHINE_START(NEO1973_GTA02, "GTA02")
597         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
598         .atag_offset    = 0x100,
599         .map_io         = gta02_map_io,
600         .init_irq       = s3c2442_init_irq,
601         .init_machine   = gta02_machine_init,
602         .init_time      = gta02_init_time,
603 MACHINE_END
604 

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