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
gta02_panic_blink(int state)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
gta02_configure_pmu_for_charger(struct pcf50633 * pcf,void * unused,int res)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
gta02_charger_worker(struct work_struct * work)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
gta02_pmu_event_callback(struct pcf50633 * pcf,int irq)205 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
206 {
207 if (irq == PCF50633_IRQ_USBINS) {
208 schedule_delayed_work(>a02_charger_work,
209 GTA02_CHARGER_CONFIGURE_TIMEOUT);
210
211 return;
212 }
213
214 if (irq == PCF50633_IRQ_USBREM) {
215 cancel_delayed_work_sync(>a02_charger_work);
216 gta02_usb_vbus_draw = 0;
217 }
218 }
219
gta02_udc_vbus_draw(unsigned int ma)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(>a02_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 = >a02_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 = >a02_nor_flash_data,
393 },
394 .resource = >a02_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 = >a02_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 = >a02_buttons_pdata,
498 },
499 };
500
gta02_map_io(void)501 static void __init gta02_map_io(void)
502 {
503 s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
504 s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
505 samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
506 }
507
508
509 /* These are the guys that don't need to be children of PMU. */
510
511 static struct platform_device *gta02_devices[] __initdata = {
512 &s3c_device_ohci,
513 &s3c_device_wdt,
514 &s3c_device_sdi,
515 &s3c_device_usbgadget,
516 &s3c_device_nand,
517 >a02_nor_flash,
518 &s3c24xx_pwm_device,
519 &s3c_device_iis,
520 &s3c_device_i2c0,
521 >a02_dfbmcs320_device,
522 >a02_buttons_device,
523 &s3c_device_adc,
524 &s3c_device_ts,
525 };
526
527 /* These guys DO need to be children of PMU. */
528
529 static struct platform_device *gta02_devices_pmu_children[] = {
530 };
531
532
533 /*
534 * This is called when pc50633 is probed, quite late in the day since it is an
535 * I2C bus device. Here we can define platform devices with the advantage that
536 * we can mark the pcf50633 as the parent. This makes them get suspended and
537 * resumed with their parent the pcf50633 still around. All devices whose
538 * operation depends on something from pcf50633 must have this relationship
539 * made explicit like this, or suspend and resume will become an unreliable
540 * hellworld.
541 */
542
gta02_pmu_attach_child_devices(struct pcf50633 * pcf)543 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
544 {
545 int n;
546
547 /* Grab a copy of the now probed PMU pointer. */
548 gta02_pcf = pcf;
549
550 for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
551 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
552
553 platform_add_devices(gta02_devices_pmu_children,
554 ARRAY_SIZE(gta02_devices_pmu_children));
555 }
556
gta02_poweroff(void)557 static void gta02_poweroff(void)
558 {
559 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
560 }
561
gta02_machine_init(void)562 static void __init gta02_machine_init(void)
563 {
564 /* Set the panic callback to turn AUX LED on or off. */
565 panic_blink = gta02_panic_blink;
566
567 s3c_pm_init();
568
569 #ifdef CONFIG_CHARGER_PCF50633
570 INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
571 #endif
572
573 s3c24xx_udc_set_platdata(>a02_udc_cfg);
574 s3c24xx_ts_set_platdata(>a02_ts_info);
575 s3c_ohci_set_platdata(>a02_usb_info);
576 s3c_nand_set_platdata(>a02_nand_info);
577 s3c_i2c0_set_platdata(NULL);
578
579 i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
580
581 platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
582 pm_power_off = gta02_poweroff;
583
584 regulator_has_full_constraints();
585 }
586
gta02_init_time(void)587 static void __init gta02_init_time(void)
588 {
589 s3c2442_init_clocks(12000000);
590 samsung_timer_init();
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 = s3c2442_init_irq,
598 .init_machine = gta02_machine_init,
599 .init_time = gta02_init_time,
600 MACHINE_END
601