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.h>
19 #include <linux/gpio_keys.h>
20 #include <linux/workqueue.h>
21 #include <linux/platform_device.h>
22 #include <linux/serial_core.h>
23 #include <linux/serial_s3c.h>
24 #include <linux/input.h>
25 #include <linux/io.h>
26 #include <linux/i2c.h>
27
28 #include <linux/mmc/host.h>
29
30 #include <linux/mfd/pcf50633/adc.h>
31 #include <linux/mfd/pcf50633/backlight.h>
32 #include <linux/mfd/pcf50633/core.h>
33 #include <linux/mfd/pcf50633/gpio.h>
34 #include <linux/mfd/pcf50633/mbc.h>
35 #include <linux/mfd/pcf50633/pmic.h>
36
37 #include <linux/mtd/mtd.h>
38 #include <linux/mtd/rawnand.h>
39 #include <linux/mtd/nand_ecc.h>
40 #include <linux/mtd/partitions.h>
41 #include <linux/mtd/physmap.h>
42
43 #include <linux/regulator/machine.h>
44
45 #include <linux/spi/spi.h>
46 #include <linux/spi/s3c24xx.h>
47
48 #include <asm/irq.h>
49 #include <asm/mach-types.h>
50 #include <asm/mach/arch.h>
51 #include <asm/mach/map.h>
52 #include <asm/mach/irq.h>
53
54 #include <linux/platform_data/i2c-s3c2410.h>
55 #include <linux/platform_data/mtd-nand-s3c2410.h>
56 #include <linux/platform_data/touchscreen-s3c2410.h>
57 #include <linux/platform_data/usb-ohci-s3c2410.h>
58 #include <linux/platform_data/usb-s3c2410_udc.h>
59
60 #include <mach/fb.h>
61 #include <mach/hardware.h>
62 #include <mach/regs-gpio.h>
63 #include <mach/regs-irq.h>
64 #include <mach/gpio-samsung.h>
65
66 #include <plat/cpu.h>
67 #include <plat/devs.h>
68 #include <plat/gpio-cfg.h>
69 #include <plat/pm.h>
70 #include <plat/samsung-time.h>
71
72 #include "common.h"
73 #include "gta02.h"
74
75 static struct pcf50633 *gta02_pcf;
76
77 /*
78 * This gets called frequently when we paniced.
79 */
80
gta02_panic_blink(int state)81 static long gta02_panic_blink(int state)
82 {
83 long delay = 0;
84 char led;
85
86 led = (state) ? 1 : 0;
87 gpio_direction_output(GTA02_GPIO_AUX_LED, led);
88
89 return delay;
90 }
91
92
93 static struct map_desc gta02_iodesc[] __initdata = {
94 {
95 .virtual = 0xe0000000,
96 .pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
97 .length = SZ_1M,
98 .type = MT_DEVICE
99 },
100 };
101
102 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
103 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
104 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
105
106 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
107 [0] = {
108 .hwport = 0,
109 .flags = 0,
110 .ucon = UCON,
111 .ulcon = ULCON,
112 .ufcon = UFCON,
113 },
114 [1] = {
115 .hwport = 1,
116 .flags = 0,
117 .ucon = UCON,
118 .ulcon = ULCON,
119 .ufcon = UFCON,
120 },
121 [2] = {
122 .hwport = 2,
123 .flags = 0,
124 .ucon = UCON,
125 .ulcon = ULCON,
126 .ufcon = UFCON,
127 },
128 };
129
130 #ifdef CONFIG_CHARGER_PCF50633
131 /*
132 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
133 * We use this to recognize that we can pull 1A from the USB socket.
134 *
135 * These constants are the measured pcf50633 ADC levels with the 1A
136 * charger / 48K resistor, and with no pulldown resistor.
137 */
138
139 #define ADC_NOM_CHG_DETECT_1A 6
140 #define ADC_NOM_CHG_DETECT_USB 43
141
142 #ifdef CONFIG_PCF50633_ADC
143 static void
gta02_configure_pmu_for_charger(struct pcf50633 * pcf,void * unused,int res)144 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
145 {
146 int ma;
147
148 /* Interpret charger type */
149 if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
150
151 /*
152 * Sanity - stop GPO driving out now that we have a 1A charger
153 * GPO controls USB Host power generation on GTA02
154 */
155 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
156
157 ma = 1000;
158 } else
159 ma = 100;
160
161 pcf50633_mbc_usb_curlim_set(pcf, ma);
162 }
163 #endif
164
165 static struct delayed_work gta02_charger_work;
166 static int gta02_usb_vbus_draw;
167
gta02_charger_worker(struct work_struct * work)168 static void gta02_charger_worker(struct work_struct *work)
169 {
170 if (gta02_usb_vbus_draw) {
171 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
172 return;
173 }
174
175 #ifdef CONFIG_PCF50633_ADC
176 pcf50633_adc_async_read(gta02_pcf,
177 PCF50633_ADCC1_MUX_ADCIN1,
178 PCF50633_ADCC1_AVERAGE_16,
179 gta02_configure_pmu_for_charger,
180 NULL);
181 #else
182 /*
183 * If the PCF50633 ADC is disabled we fallback to a
184 * 100mA limit for safety.
185 */
186 pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
187 #endif
188 }
189
190 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
191
gta02_pmu_event_callback(struct pcf50633 * pcf,int irq)192 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
193 {
194 if (irq == PCF50633_IRQ_USBINS) {
195 schedule_delayed_work(>a02_charger_work,
196 GTA02_CHARGER_CONFIGURE_TIMEOUT);
197
198 return;
199 }
200
201 if (irq == PCF50633_IRQ_USBREM) {
202 cancel_delayed_work_sync(>a02_charger_work);
203 gta02_usb_vbus_draw = 0;
204 }
205 }
206
gta02_udc_vbus_draw(unsigned int ma)207 static void gta02_udc_vbus_draw(unsigned int ma)
208 {
209 if (!gta02_pcf)
210 return;
211
212 gta02_usb_vbus_draw = ma;
213
214 schedule_delayed_work(>a02_charger_work,
215 GTA02_CHARGER_CONFIGURE_TIMEOUT);
216 }
217 #else /* !CONFIG_CHARGER_PCF50633 */
218 #define gta02_pmu_event_callback NULL
219 #define gta02_udc_vbus_draw NULL
220 #endif
221
222 static char *gta02_batteries[] = {
223 "battery",
224 };
225
226 static struct pcf50633_bl_platform_data gta02_backlight_data = {
227 .default_brightness = 0x3f,
228 .default_brightness_limit = 0,
229 .ramp_time = 5,
230 };
231
232 static struct pcf50633_platform_data gta02_pcf_pdata = {
233 .resumers = {
234 [0] = PCF50633_INT1_USBINS |
235 PCF50633_INT1_USBREM |
236 PCF50633_INT1_ALARM,
237 [1] = PCF50633_INT2_ONKEYF,
238 [2] = PCF50633_INT3_ONKEY1S,
239 [3] = PCF50633_INT4_LOWSYS |
240 PCF50633_INT4_LOWBAT |
241 PCF50633_INT4_HIGHTMP,
242 },
243
244 .batteries = gta02_batteries,
245 .num_batteries = ARRAY_SIZE(gta02_batteries),
246
247 .charger_reference_current_ma = 1000,
248
249 .backlight_data = >a02_backlight_data,
250
251 .reg_init_data = {
252 [PCF50633_REGULATOR_AUTO] = {
253 .constraints = {
254 .min_uV = 3300000,
255 .max_uV = 3300000,
256 .valid_modes_mask = REGULATOR_MODE_NORMAL,
257 .always_on = 1,
258 .apply_uV = 1,
259 },
260 },
261 [PCF50633_REGULATOR_DOWN1] = {
262 .constraints = {
263 .min_uV = 1300000,
264 .max_uV = 1600000,
265 .valid_modes_mask = REGULATOR_MODE_NORMAL,
266 .always_on = 1,
267 .apply_uV = 1,
268 },
269 },
270 [PCF50633_REGULATOR_DOWN2] = {
271 .constraints = {
272 .min_uV = 1800000,
273 .max_uV = 1800000,
274 .valid_modes_mask = REGULATOR_MODE_NORMAL,
275 .apply_uV = 1,
276 .always_on = 1,
277 },
278 },
279 [PCF50633_REGULATOR_HCLDO] = {
280 .constraints = {
281 .min_uV = 2000000,
282 .max_uV = 3300000,
283 .valid_modes_mask = REGULATOR_MODE_NORMAL,
284 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
285 REGULATOR_CHANGE_STATUS,
286 },
287 },
288 [PCF50633_REGULATOR_LDO1] = {
289 .constraints = {
290 .min_uV = 3300000,
291 .max_uV = 3300000,
292 .valid_modes_mask = REGULATOR_MODE_NORMAL,
293 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
294 .apply_uV = 1,
295 },
296 },
297 [PCF50633_REGULATOR_LDO2] = {
298 .constraints = {
299 .min_uV = 3300000,
300 .max_uV = 3300000,
301 .valid_modes_mask = REGULATOR_MODE_NORMAL,
302 .apply_uV = 1,
303 },
304 },
305 [PCF50633_REGULATOR_LDO3] = {
306 .constraints = {
307 .min_uV = 3000000,
308 .max_uV = 3000000,
309 .valid_modes_mask = REGULATOR_MODE_NORMAL,
310 .apply_uV = 1,
311 },
312 },
313 [PCF50633_REGULATOR_LDO4] = {
314 .constraints = {
315 .min_uV = 3200000,
316 .max_uV = 3200000,
317 .valid_modes_mask = REGULATOR_MODE_NORMAL,
318 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
319 .apply_uV = 1,
320 },
321 },
322 [PCF50633_REGULATOR_LDO5] = {
323 .constraints = {
324 .min_uV = 3000000,
325 .max_uV = 3000000,
326 .valid_modes_mask = REGULATOR_MODE_NORMAL,
327 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
328 .apply_uV = 1,
329 },
330 },
331 [PCF50633_REGULATOR_LDO6] = {
332 .constraints = {
333 .min_uV = 3000000,
334 .max_uV = 3000000,
335 .valid_modes_mask = REGULATOR_MODE_NORMAL,
336 },
337 },
338 [PCF50633_REGULATOR_MEMLDO] = {
339 .constraints = {
340 .min_uV = 1800000,
341 .max_uV = 1800000,
342 .valid_modes_mask = REGULATOR_MODE_NORMAL,
343 },
344 },
345
346 },
347 .mbc_event_callback = gta02_pmu_event_callback,
348 };
349
350
351 /* NOR Flash. */
352
353 #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
354 #define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
355
356 static struct physmap_flash_data gta02_nor_flash_data = {
357 .width = 2,
358 };
359
360 static struct resource gta02_nor_flash_resource =
361 DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
362
363 static struct platform_device gta02_nor_flash = {
364 .name = "physmap-flash",
365 .id = 0,
366 .dev = {
367 .platform_data = >a02_nor_flash_data,
368 },
369 .resource = >a02_nor_flash_resource,
370 .num_resources = 1,
371 };
372
373
374 static struct platform_device s3c24xx_pwm_device = {
375 .name = "s3c24xx_pwm",
376 .num_resources = 0,
377 };
378
379 static struct platform_device gta02_dfbmcs320_device = {
380 .name = "dfbmcs320",
381 };
382
383 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
384 {
385 I2C_BOARD_INFO("pcf50633", 0x73),
386 .irq = GTA02_IRQ_PCF50633,
387 .platform_data = >a02_pcf_pdata,
388 },
389 {
390 I2C_BOARD_INFO("wm8753", 0x1a),
391 },
392 };
393
394 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
395 [0] = {
396 /*
397 * This name is also hard-coded in the boot loaders, so
398 * changing it would would require all users to upgrade
399 * their boot loaders, some of which are stored in a NOR
400 * that is considered to be immutable.
401 */
402 .name = "neo1973-nand",
403 .nr_chips = 1,
404 .flash_bbt = 1,
405 },
406 };
407
408 /*
409 * Choose a set of timings derived from S3C@2442B MCP54
410 * data sheet (K5D2G13ACM-D075 MCP Memory).
411 */
412
413 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
414 .tacls = 0,
415 .twrph0 = 25,
416 .twrph1 = 15,
417 .nr_sets = ARRAY_SIZE(gta02_nand_sets),
418 .sets = gta02_nand_sets,
419 .ecc_mode = NAND_ECC_SOFT,
420 };
421
422
423 /* Get PMU to set USB current limit accordingly. */
424 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
425 .vbus_draw = gta02_udc_vbus_draw,
426 .pullup_pin = GTA02_GPIO_USB_PULLUP,
427 };
428
429 /* USB */
430 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
431 .port[0] = {
432 .flags = S3C_HCDFLG_USED,
433 },
434 .port[1] = {
435 .flags = 0,
436 },
437 };
438
439 /* Touchscreen */
440 static struct s3c2410_ts_mach_info gta02_ts_info = {
441 .delay = 10000,
442 .presc = 0xff, /* slow as we can go */
443 .oversampling_shift = 2,
444 };
445
446 /* Buttons */
447 static struct gpio_keys_button gta02_buttons[] = {
448 {
449 .gpio = GTA02_GPIO_AUX_KEY,
450 .code = KEY_PHONE,
451 .desc = "Aux",
452 .type = EV_KEY,
453 .debounce_interval = 100,
454 },
455 {
456 .gpio = GTA02_GPIO_HOLD_KEY,
457 .code = KEY_PAUSE,
458 .desc = "Hold",
459 .type = EV_KEY,
460 .debounce_interval = 100,
461 },
462 };
463
464 static struct gpio_keys_platform_data gta02_buttons_pdata = {
465 .buttons = gta02_buttons,
466 .nbuttons = ARRAY_SIZE(gta02_buttons),
467 };
468
469 static struct platform_device gta02_buttons_device = {
470 .name = "gpio-keys",
471 .id = -1,
472 .dev = {
473 .platform_data = >a02_buttons_pdata,
474 },
475 };
476
gta02_map_io(void)477 static void __init gta02_map_io(void)
478 {
479 s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
480 s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
481 samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
482 }
483
484
485 /* These are the guys that don't need to be children of PMU. */
486
487 static struct platform_device *gta02_devices[] __initdata = {
488 &s3c_device_ohci,
489 &s3c_device_wdt,
490 &s3c_device_sdi,
491 &s3c_device_usbgadget,
492 &s3c_device_nand,
493 >a02_nor_flash,
494 &s3c24xx_pwm_device,
495 &s3c_device_iis,
496 &s3c_device_i2c0,
497 >a02_dfbmcs320_device,
498 >a02_buttons_device,
499 &s3c_device_adc,
500 &s3c_device_ts,
501 };
502
gta02_poweroff(void)503 static void gta02_poweroff(void)
504 {
505 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
506 }
507
gta02_machine_init(void)508 static void __init gta02_machine_init(void)
509 {
510 /* Set the panic callback to turn AUX LED on or off. */
511 panic_blink = gta02_panic_blink;
512
513 s3c_pm_init();
514
515 #ifdef CONFIG_CHARGER_PCF50633
516 INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
517 #endif
518
519 s3c24xx_udc_set_platdata(>a02_udc_cfg);
520 s3c24xx_ts_set_platdata(>a02_ts_info);
521 s3c_ohci_set_platdata(>a02_usb_info);
522 s3c_nand_set_platdata(>a02_nand_info);
523 s3c_i2c0_set_platdata(NULL);
524
525 i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
526
527 platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
528 pm_power_off = gta02_poweroff;
529
530 regulator_has_full_constraints();
531 }
532
gta02_init_time(void)533 static void __init gta02_init_time(void)
534 {
535 s3c2442_init_clocks(12000000);
536 samsung_timer_init();
537 }
538
539 MACHINE_START(NEO1973_GTA02, "GTA02")
540 /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
541 .atag_offset = 0x100,
542 .map_io = gta02_map_io,
543 .init_irq = s3c2442_init_irq,
544 .init_machine = gta02_machine_init,
545 .init_time = gta02_init_time,
546 MACHINE_END
547
