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/rawnand.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 #ifdef CONFIG_PCF50633_ADC
158 static void
gta02_configure_pmu_for_charger(struct pcf50633 * pcf,void * unused,int res)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
gta02_charger_worker(struct work_struct * work)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
gta02_pmu_event_callback(struct pcf50633 * pcf,int irq)207 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
208 {
209 if (irq == PCF50633_IRQ_USBINS) {
210 schedule_delayed_work(>a02_charger_work,
211 GTA02_CHARGER_CONFIGURE_TIMEOUT);
212
213 return;
214 }
215
216 if (irq == PCF50633_IRQ_USBREM) {
217 cancel_delayed_work_sync(>a02_charger_work);
218 gta02_usb_vbus_draw = 0;
219 }
220 }
221
gta02_udc_vbus_draw(unsigned int ma)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(>a02_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 = >a02_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 = >a02_nor_flash_data,
395 },
396 .resource = >a02_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 = >a02_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 = >a02_buttons_pdata,
501 },
502 };
503
gta02_map_io(void)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 >a02_nor_flash,
521 &s3c24xx_pwm_device,
522 &s3c_device_iis,
523 &s3c_device_i2c0,
524 >a02_dfbmcs320_device,
525 >a02_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
gta02_pmu_attach_child_devices(struct pcf50633 * pcf)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
gta02_poweroff(void)560 static void gta02_poweroff(void)
561 {
562 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
563 }
564
gta02_machine_init(void)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(>a02_charger_work, gta02_charger_worker);
574 #endif
575
576 s3c24xx_udc_set_platdata(>a02_udc_cfg);
577 s3c24xx_ts_set_platdata(>a02_ts_info);
578 s3c_ohci_set_platdata(>a02_usb_info);
579 s3c_nand_set_platdata(>a02_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
gta02_init_time(void)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