1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
4 //
5 // Copyright (C) 2006-2009 by Openmoko, Inc.
6 // Authors: Harald Welte <laforge@openmoko.org>
7 // Andy Green <andy@openmoko.org>
8 // Werner Almesberger <werner@openmoko.org>
9 // All rights reserved.
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/interrupt.h>
14 #include <linux/list.h>
15 #include <linux/delay.h>
16 #include <linux/timer.h>
17 #include <linux/init.h>
18 #include <linux/gpio/machine.h>
19 #include <linux/gpio.h>
20 #include <linux/gpio_keys.h>
21 #include <linux/workqueue.h>
22 #include <linux/platform_device.h>
23 #include <linux/serial_core.h>
24 #include <linux/serial_s3c.h>
25 #include <linux/input.h>
26 #include <linux/io.h>
27 #include <linux/i2c.h>
28
29 #include <linux/mmc/host.h>
30
31 #include <linux/mfd/pcf50633/adc.h>
32 #include <linux/mfd/pcf50633/backlight.h>
33 #include <linux/mfd/pcf50633/core.h>
34 #include <linux/mfd/pcf50633/gpio.h>
35 #include <linux/mfd/pcf50633/mbc.h>
36 #include <linux/mfd/pcf50633/pmic.h>
37
38 #include <linux/mtd/mtd.h>
39 #include <linux/mtd/rawnand.h>
40 #include <linux/mtd/nand_ecc.h>
41 #include <linux/mtd/partitions.h>
42 #include <linux/mtd/physmap.h>
43
44 #include <linux/regulator/machine.h>
45
46 #include <linux/spi/spi.h>
47 #include <linux/spi/s3c24xx.h>
48
49 #include <asm/irq.h>
50 #include <asm/mach-types.h>
51 #include <asm/mach/arch.h>
52 #include <asm/mach/map.h>
53 #include <asm/mach/irq.h>
54
55 #include <linux/platform_data/i2c-s3c2410.h>
56 #include <linux/platform_data/mtd-nand-s3c2410.h>
57 #include <linux/platform_data/touchscreen-s3c2410.h>
58 #include <linux/platform_data/usb-ohci-s3c2410.h>
59 #include <linux/platform_data/usb-s3c2410_udc.h>
60 #include <linux/platform_data/fb-s3c2410.h>
61
62 #include "regs-gpio.h"
63 #include "regs-irq.h"
64 #include "gpio-samsung.h"
65
66 #include "cpu.h"
67 #include "devs.h"
68 #include "gpio-cfg.h"
69 #include "pm.h"
70
71 #include "s3c24xx.h"
72 #include "gta02.h"
73
74 static struct pcf50633 *gta02_pcf;
75
76 /*
77 * This gets called frequently when we paniced.
78 */
79
gta02_panic_blink(int state)80 static long gta02_panic_blink(int state)
81 {
82 long delay = 0;
83 char led;
84
85 led = (state) ? 1 : 0;
86 gpio_direction_output(GTA02_GPIO_AUX_LED, led);
87
88 return delay;
89 }
90
91
92 static struct map_desc gta02_iodesc[] __initdata = {
93 {
94 .virtual = 0xe0000000,
95 .pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
96 .length = SZ_1M,
97 .type = MT_DEVICE
98 },
99 };
100
101 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
102 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
103 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
104
105 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
106 [0] = {
107 .hwport = 0,
108 .flags = 0,
109 .ucon = UCON,
110 .ulcon = ULCON,
111 .ufcon = UFCON,
112 },
113 [1] = {
114 .hwport = 1,
115 .flags = 0,
116 .ucon = UCON,
117 .ulcon = ULCON,
118 .ufcon = UFCON,
119 },
120 [2] = {
121 .hwport = 2,
122 .flags = 0,
123 .ucon = UCON,
124 .ulcon = ULCON,
125 .ufcon = UFCON,
126 },
127 };
128
129 #ifdef CONFIG_CHARGER_PCF50633
130 /*
131 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
132 * We use this to recognize that we can pull 1A from the USB socket.
133 *
134 * These constants are the measured pcf50633 ADC levels with the 1A
135 * charger / 48K resistor, and with no pulldown resistor.
136 */
137
138 #define ADC_NOM_CHG_DETECT_1A 6
139 #define ADC_NOM_CHG_DETECT_USB 43
140
141 #ifdef CONFIG_PCF50633_ADC
142 static void
gta02_configure_pmu_for_charger(struct pcf50633 * pcf,void * unused,int res)143 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
144 {
145 int ma;
146
147 /* Interpret charger type */
148 if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
149
150 /*
151 * Sanity - stop GPO driving out now that we have a 1A charger
152 * GPO controls USB Host power generation on GTA02
153 */
154 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
155
156 ma = 1000;
157 } else
158 ma = 100;
159
160 pcf50633_mbc_usb_curlim_set(pcf, ma);
161 }
162 #endif
163
164 static struct delayed_work gta02_charger_work;
165 static int gta02_usb_vbus_draw;
166
gta02_charger_worker(struct work_struct * work)167 static void gta02_charger_worker(struct work_struct *work)
168 {
169 if (gta02_usb_vbus_draw) {
170 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
171 return;
172 }
173
174 #ifdef CONFIG_PCF50633_ADC
175 pcf50633_adc_async_read(gta02_pcf,
176 PCF50633_ADCC1_MUX_ADCIN1,
177 PCF50633_ADCC1_AVERAGE_16,
178 gta02_configure_pmu_for_charger,
179 NULL);
180 #else
181 /*
182 * If the PCF50633 ADC is disabled we fallback to a
183 * 100mA limit for safety.
184 */
185 pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
186 #endif
187 }
188
189 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
190
gta02_pmu_event_callback(struct pcf50633 * pcf,int irq)191 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
192 {
193 if (irq == PCF50633_IRQ_USBINS) {
194 schedule_delayed_work(>a02_charger_work,
195 GTA02_CHARGER_CONFIGURE_TIMEOUT);
196
197 return;
198 }
199
200 if (irq == PCF50633_IRQ_USBREM) {
201 cancel_delayed_work_sync(>a02_charger_work);
202 gta02_usb_vbus_draw = 0;
203 }
204 }
205
gta02_udc_vbus_draw(unsigned int ma)206 static void gta02_udc_vbus_draw(unsigned int ma)
207 {
208 if (!gta02_pcf)
209 return;
210
211 gta02_usb_vbus_draw = ma;
212
213 schedule_delayed_work(>a02_charger_work,
214 GTA02_CHARGER_CONFIGURE_TIMEOUT);
215 }
216 #else /* !CONFIG_CHARGER_PCF50633 */
217 #define gta02_pmu_event_callback NULL
218 #define gta02_udc_vbus_draw NULL
219 #endif
220
221 static char *gta02_batteries[] = {
222 "battery",
223 };
224
225 static struct pcf50633_bl_platform_data gta02_backlight_data = {
226 .default_brightness = 0x3f,
227 .default_brightness_limit = 0,
228 .ramp_time = 5,
229 };
230
231 static struct pcf50633_platform_data gta02_pcf_pdata = {
232 .resumers = {
233 [0] = PCF50633_INT1_USBINS |
234 PCF50633_INT1_USBREM |
235 PCF50633_INT1_ALARM,
236 [1] = PCF50633_INT2_ONKEYF,
237 [2] = PCF50633_INT3_ONKEY1S,
238 [3] = PCF50633_INT4_LOWSYS |
239 PCF50633_INT4_LOWBAT |
240 PCF50633_INT4_HIGHTMP,
241 },
242
243 .batteries = gta02_batteries,
244 .num_batteries = ARRAY_SIZE(gta02_batteries),
245
246 .charger_reference_current_ma = 1000,
247
248 .backlight_data = >a02_backlight_data,
249
250 .reg_init_data = {
251 [PCF50633_REGULATOR_AUTO] = {
252 .constraints = {
253 .min_uV = 3300000,
254 .max_uV = 3300000,
255 .valid_modes_mask = REGULATOR_MODE_NORMAL,
256 .always_on = 1,
257 .apply_uV = 1,
258 },
259 },
260 [PCF50633_REGULATOR_DOWN1] = {
261 .constraints = {
262 .min_uV = 1300000,
263 .max_uV = 1600000,
264 .valid_modes_mask = REGULATOR_MODE_NORMAL,
265 .always_on = 1,
266 .apply_uV = 1,
267 },
268 },
269 [PCF50633_REGULATOR_DOWN2] = {
270 .constraints = {
271 .min_uV = 1800000,
272 .max_uV = 1800000,
273 .valid_modes_mask = REGULATOR_MODE_NORMAL,
274 .apply_uV = 1,
275 .always_on = 1,
276 },
277 },
278 [PCF50633_REGULATOR_HCLDO] = {
279 .constraints = {
280 .min_uV = 2000000,
281 .max_uV = 3300000,
282 .valid_modes_mask = REGULATOR_MODE_NORMAL,
283 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
284 REGULATOR_CHANGE_STATUS,
285 },
286 },
287 [PCF50633_REGULATOR_LDO1] = {
288 .constraints = {
289 .min_uV = 3300000,
290 .max_uV = 3300000,
291 .valid_modes_mask = REGULATOR_MODE_NORMAL,
292 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
293 .apply_uV = 1,
294 },
295 },
296 [PCF50633_REGULATOR_LDO2] = {
297 .constraints = {
298 .min_uV = 3300000,
299 .max_uV = 3300000,
300 .valid_modes_mask = REGULATOR_MODE_NORMAL,
301 .apply_uV = 1,
302 },
303 },
304 [PCF50633_REGULATOR_LDO3] = {
305 .constraints = {
306 .min_uV = 3000000,
307 .max_uV = 3000000,
308 .valid_modes_mask = REGULATOR_MODE_NORMAL,
309 .apply_uV = 1,
310 },
311 },
312 [PCF50633_REGULATOR_LDO4] = {
313 .constraints = {
314 .min_uV = 3200000,
315 .max_uV = 3200000,
316 .valid_modes_mask = REGULATOR_MODE_NORMAL,
317 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
318 .apply_uV = 1,
319 },
320 },
321 [PCF50633_REGULATOR_LDO5] = {
322 .constraints = {
323 .min_uV = 3000000,
324 .max_uV = 3000000,
325 .valid_modes_mask = REGULATOR_MODE_NORMAL,
326 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
327 .apply_uV = 1,
328 },
329 },
330 [PCF50633_REGULATOR_LDO6] = {
331 .constraints = {
332 .min_uV = 3000000,
333 .max_uV = 3000000,
334 .valid_modes_mask = REGULATOR_MODE_NORMAL,
335 },
336 },
337 [PCF50633_REGULATOR_MEMLDO] = {
338 .constraints = {
339 .min_uV = 1800000,
340 .max_uV = 1800000,
341 .valid_modes_mask = REGULATOR_MODE_NORMAL,
342 },
343 },
344
345 },
346 .mbc_event_callback = gta02_pmu_event_callback,
347 };
348
349
350 /* NOR Flash. */
351
352 #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
353 #define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
354
355 static struct physmap_flash_data gta02_nor_flash_data = {
356 .width = 2,
357 };
358
359 static struct resource gta02_nor_flash_resource =
360 DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
361
362 static struct platform_device gta02_nor_flash = {
363 .name = "physmap-flash",
364 .id = 0,
365 .dev = {
366 .platform_data = >a02_nor_flash_data,
367 },
368 .resource = >a02_nor_flash_resource,
369 .num_resources = 1,
370 };
371
372
373 static struct platform_device s3c24xx_pwm_device = {
374 .name = "s3c24xx_pwm",
375 .num_resources = 0,
376 };
377
378 static struct platform_device gta02_dfbmcs320_device = {
379 .name = "dfbmcs320",
380 };
381
382 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
383 {
384 I2C_BOARD_INFO("pcf50633", 0x73),
385 .irq = GTA02_IRQ_PCF50633,
386 .platform_data = >a02_pcf_pdata,
387 },
388 {
389 I2C_BOARD_INFO("wm8753", 0x1a),
390 },
391 };
392
393 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
394 [0] = {
395 /*
396 * This name is also hard-coded in the boot loaders, so
397 * changing it would would require all users to upgrade
398 * their boot loaders, some of which are stored in a NOR
399 * that is considered to be immutable.
400 */
401 .name = "neo1973-nand",
402 .nr_chips = 1,
403 .flash_bbt = 1,
404 },
405 };
406
407 /*
408 * Choose a set of timings derived from S3C@2442B MCP54
409 * data sheet (K5D2G13ACM-D075 MCP Memory).
410 */
411
412 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
413 .tacls = 0,
414 .twrph0 = 25,
415 .twrph1 = 15,
416 .nr_sets = ARRAY_SIZE(gta02_nand_sets),
417 .sets = gta02_nand_sets,
418 .engine_type = NAND_ECC_ENGINE_TYPE_SOFT,
419 };
420
421
422 /* Get PMU to set USB current limit accordingly. */
423 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
424 .vbus_draw = gta02_udc_vbus_draw,
425 .pullup_pin = GTA02_GPIO_USB_PULLUP,
426 };
427
428 /* USB */
429 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
430 .port[0] = {
431 .flags = S3C_HCDFLG_USED,
432 },
433 .port[1] = {
434 .flags = 0,
435 },
436 };
437
438 /* Touchscreen */
439 static struct s3c2410_ts_mach_info gta02_ts_info = {
440 .delay = 10000,
441 .presc = 0xff, /* slow as we can go */
442 .oversampling_shift = 2,
443 };
444
445 /* Buttons */
446 static struct gpio_keys_button gta02_buttons[] = {
447 {
448 .gpio = GTA02_GPIO_AUX_KEY,
449 .code = KEY_PHONE,
450 .desc = "Aux",
451 .type = EV_KEY,
452 .debounce_interval = 100,
453 },
454 {
455 .gpio = GTA02_GPIO_HOLD_KEY,
456 .code = KEY_PAUSE,
457 .desc = "Hold",
458 .type = EV_KEY,
459 .debounce_interval = 100,
460 },
461 };
462
463 static struct gpio_keys_platform_data gta02_buttons_pdata = {
464 .buttons = gta02_buttons,
465 .nbuttons = ARRAY_SIZE(gta02_buttons),
466 };
467
468 static struct platform_device gta02_buttons_device = {
469 .name = "gpio-keys",
470 .id = -1,
471 .dev = {
472 .platform_data = >a02_buttons_pdata,
473 },
474 };
475
476 static struct gpiod_lookup_table gta02_audio_gpio_table = {
477 .dev_id = "neo1973-audio",
478 .table = {
479 GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
480 GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
481 { },
482 },
483 };
484
485 static struct platform_device gta02_audio = {
486 .name = "neo1973-audio",
487 .id = -1,
488 };
489
490 static struct gpiod_lookup_table gta02_mmc_gpio_table = {
491 .dev_id = "s3c2410-sdi",
492 .table = {
493 /* bus pins */
494 GPIO_LOOKUP_IDX("GPIOE", 5, "bus", 0, GPIO_ACTIVE_HIGH),
495 GPIO_LOOKUP_IDX("GPIOE", 6, "bus", 1, GPIO_ACTIVE_HIGH),
496 GPIO_LOOKUP_IDX("GPIOE", 7, "bus", 2, GPIO_ACTIVE_HIGH),
497 GPIO_LOOKUP_IDX("GPIOE", 8, "bus", 3, GPIO_ACTIVE_HIGH),
498 GPIO_LOOKUP_IDX("GPIOE", 9, "bus", 4, GPIO_ACTIVE_HIGH),
499 GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
500 { },
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 s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_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 >a02_audio,
529 };
530
gta02_poweroff(void)531 static void gta02_poweroff(void)
532 {
533 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
534 }
535
gta02_machine_init(void)536 static void __init gta02_machine_init(void)
537 {
538 /* Set the panic callback to turn AUX LED on or off. */
539 panic_blink = gta02_panic_blink;
540
541 s3c_pm_init();
542
543 #ifdef CONFIG_CHARGER_PCF50633
544 INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
545 #endif
546
547 s3c24xx_udc_set_platdata(>a02_udc_cfg);
548 s3c24xx_ts_set_platdata(>a02_ts_info);
549 s3c_ohci_set_platdata(>a02_usb_info);
550 s3c_nand_set_platdata(>a02_nand_info);
551 s3c_i2c0_set_platdata(NULL);
552
553 i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
554
555 /* Configure the I2S pins (GPE0...GPE4) in correct mode */
556 s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
557 S3C_GPIO_PULL_NONE);
558
559 gpiod_add_lookup_table(>a02_audio_gpio_table);
560 gpiod_add_lookup_table(>a02_mmc_gpio_table);
561 platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
562 pm_power_off = gta02_poweroff;
563
564 regulator_has_full_constraints();
565 }
566
gta02_init_time(void)567 static void __init gta02_init_time(void)
568 {
569 s3c2442_init_clocks(12000000);
570 s3c24xx_timer_init();
571 }
572
573 MACHINE_START(NEO1973_GTA02, "GTA02")
574 /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
575 .atag_offset = 0x100,
576 .map_io = gta02_map_io,
577 .init_irq = s3c2442_init_irq,
578 .init_machine = gta02_machine_init,
579 .init_time = gta02_init_time,
580 MACHINE_END
581