1 // SPDX-License-Identifier: GPL-2.0+
3 // S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
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.
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>
27 #include <linux/i2c.h>
29 #include <linux/mmc/host.h>
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>
38 #include <linux/mtd/mtd.h>
39 #include <linux/mtd/rawnand.h>
40 #include <linux/mtd/nand-ecc-sw-hamming.h>
41 #include <linux/mtd/partitions.h>
42 #include <linux/mtd/physmap.h>
44 #include <linux/regulator/machine.h>
46 #include <linux/spi/spi.h>
47 #include <linux/spi/s3c24xx.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>
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>
62 #include "regs-gpio.h"
64 #include "gpio-samsung.h"
74 static struct pcf50633 *gta02_pcf;
77 * This gets called frequently when we paniced.
80 static long gta02_panic_blink(int state)
84 led = (state) ? 1 : 0;
85 gpio_direction_output(GTA02_GPIO_AUX_LED, led);
91 static struct map_desc gta02_iodesc[] __initdata = {
93 .virtual = 0xe0000000,
94 .pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
100 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
101 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
102 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
104 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
128 #ifdef CONFIG_CHARGER_PCF50633
130 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
131 * We use this to recognize that we can pull 1A from the USB socket.
133 * These constants are the measured pcf50633 ADC levels with the 1A
134 * charger / 48K resistor, and with no pulldown resistor.
137 #define ADC_NOM_CHG_DETECT_1A 6
138 #define ADC_NOM_CHG_DETECT_USB 43
140 #ifdef CONFIG_PCF50633_ADC
142 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
146 /* Interpret charger type */
147 if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
150 * Sanity - stop GPO driving out now that we have a 1A charger
151 * GPO controls USB Host power generation on GTA02
153 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
159 pcf50633_mbc_usb_curlim_set(pcf, ma);
163 static struct delayed_work gta02_charger_work;
164 static int gta02_usb_vbus_draw;
166 static void gta02_charger_worker(struct work_struct *work)
168 if (gta02_usb_vbus_draw) {
169 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
173 #ifdef CONFIG_PCF50633_ADC
174 pcf50633_adc_async_read(gta02_pcf,
175 PCF50633_ADCC1_MUX_ADCIN1,
176 PCF50633_ADCC1_AVERAGE_16,
177 gta02_configure_pmu_for_charger,
181 * If the PCF50633 ADC is disabled we fallback to a
182 * 100mA limit for safety.
184 pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
188 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
190 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
192 if (irq == PCF50633_IRQ_USBINS) {
193 schedule_delayed_work(>a02_charger_work,
194 GTA02_CHARGER_CONFIGURE_TIMEOUT);
199 if (irq == PCF50633_IRQ_USBREM) {
200 cancel_delayed_work_sync(>a02_charger_work);
201 gta02_usb_vbus_draw = 0;
205 static void gta02_udc_vbus_draw(unsigned int ma)
210 gta02_usb_vbus_draw = ma;
212 schedule_delayed_work(>a02_charger_work,
213 GTA02_CHARGER_CONFIGURE_TIMEOUT);
215 #else /* !CONFIG_CHARGER_PCF50633 */
216 #define gta02_pmu_event_callback NULL
217 #define gta02_udc_vbus_draw NULL
220 static char *gta02_batteries[] = {
224 static struct pcf50633_bl_platform_data gta02_backlight_data = {
225 .default_brightness = 0x3f,
226 .default_brightness_limit = 0,
230 static struct pcf50633_platform_data gta02_pcf_pdata = {
232 [0] = PCF50633_INT1_USBINS |
233 PCF50633_INT1_USBREM |
235 [1] = PCF50633_INT2_ONKEYF,
236 [2] = PCF50633_INT3_ONKEY1S,
237 [3] = PCF50633_INT4_LOWSYS |
238 PCF50633_INT4_LOWBAT |
239 PCF50633_INT4_HIGHTMP,
242 .batteries = gta02_batteries,
243 .num_batteries = ARRAY_SIZE(gta02_batteries),
245 .charger_reference_current_ma = 1000,
247 .backlight_data = >a02_backlight_data,
250 [PCF50633_REGULATOR_AUTO] = {
254 .valid_modes_mask = REGULATOR_MODE_NORMAL,
259 [PCF50633_REGULATOR_DOWN1] = {
263 .valid_modes_mask = REGULATOR_MODE_NORMAL,
268 [PCF50633_REGULATOR_DOWN2] = {
272 .valid_modes_mask = REGULATOR_MODE_NORMAL,
277 [PCF50633_REGULATOR_HCLDO] = {
281 .valid_modes_mask = REGULATOR_MODE_NORMAL,
282 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
283 REGULATOR_CHANGE_STATUS,
286 [PCF50633_REGULATOR_LDO1] = {
290 .valid_modes_mask = REGULATOR_MODE_NORMAL,
291 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
295 [PCF50633_REGULATOR_LDO2] = {
299 .valid_modes_mask = REGULATOR_MODE_NORMAL,
303 [PCF50633_REGULATOR_LDO3] = {
307 .valid_modes_mask = REGULATOR_MODE_NORMAL,
311 [PCF50633_REGULATOR_LDO4] = {
315 .valid_modes_mask = REGULATOR_MODE_NORMAL,
316 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
320 [PCF50633_REGULATOR_LDO5] = {
324 .valid_modes_mask = REGULATOR_MODE_NORMAL,
325 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
329 [PCF50633_REGULATOR_LDO6] = {
333 .valid_modes_mask = REGULATOR_MODE_NORMAL,
336 [PCF50633_REGULATOR_MEMLDO] = {
340 .valid_modes_mask = REGULATOR_MODE_NORMAL,
345 .mbc_event_callback = gta02_pmu_event_callback,
351 #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
352 #define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
354 static struct physmap_flash_data gta02_nor_flash_data = {
358 static struct resource gta02_nor_flash_resource =
359 DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
361 static struct platform_device gta02_nor_flash = {
362 .name = "physmap-flash",
365 .platform_data = >a02_nor_flash_data,
367 .resource = >a02_nor_flash_resource,
372 static struct platform_device s3c24xx_pwm_device = {
373 .name = "s3c24xx_pwm",
377 static struct platform_device gta02_dfbmcs320_device = {
381 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
383 I2C_BOARD_INFO("pcf50633", 0x73),
384 .irq = GTA02_IRQ_PCF50633,
385 .platform_data = >a02_pcf_pdata,
388 I2C_BOARD_INFO("wm8753", 0x1a),
392 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
395 * This name is also hard-coded in the boot loaders, so
396 * changing it would would require all users to upgrade
397 * their boot loaders, some of which are stored in a NOR
398 * that is considered to be immutable.
400 .name = "neo1973-nand",
407 * Choose a set of timings derived from S3C@2442B MCP54
408 * data sheet (K5D2G13ACM-D075 MCP Memory).
411 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
415 .nr_sets = ARRAY_SIZE(gta02_nand_sets),
416 .sets = gta02_nand_sets,
417 .engine_type = NAND_ECC_ENGINE_TYPE_SOFT,
421 /* Get PMU to set USB current limit accordingly. */
422 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
423 .vbus_draw = gta02_udc_vbus_draw,
426 static struct gpiod_lookup_table gta02_udc_gpio_table = {
427 .dev_id = "s3c2410-usbgadget",
429 GPIO_LOOKUP("GPIOB", 9, "pullup", GPIO_ACTIVE_HIGH),
435 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
437 .flags = S3C_HCDFLG_USED,
445 static struct s3c2410_ts_mach_info gta02_ts_info = {
447 .presc = 0xff, /* slow as we can go */
448 .oversampling_shift = 2,
452 static struct gpio_keys_button gta02_buttons[] = {
454 .gpio = GTA02_GPIO_AUX_KEY,
458 .debounce_interval = 100,
461 .gpio = GTA02_GPIO_HOLD_KEY,
465 .debounce_interval = 100,
469 static struct gpio_keys_platform_data gta02_buttons_pdata = {
470 .buttons = gta02_buttons,
471 .nbuttons = ARRAY_SIZE(gta02_buttons),
474 static struct platform_device gta02_buttons_device = {
478 .platform_data = >a02_buttons_pdata,
482 static struct gpiod_lookup_table gta02_audio_gpio_table = {
483 .dev_id = "neo1973-audio",
485 GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
486 GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
491 static struct platform_device gta02_audio = {
492 .name = "neo1973-audio",
496 static struct gpiod_lookup_table gta02_mmc_gpio_table = {
497 .dev_id = "s3c2410-sdi",
500 GPIO_LOOKUP_IDX("GPIOE", 5, "bus", 0, GPIO_ACTIVE_HIGH),
501 GPIO_LOOKUP_IDX("GPIOE", 6, "bus", 1, GPIO_ACTIVE_HIGH),
502 GPIO_LOOKUP_IDX("GPIOE", 7, "bus", 2, GPIO_ACTIVE_HIGH),
503 GPIO_LOOKUP_IDX("GPIOE", 8, "bus", 3, GPIO_ACTIVE_HIGH),
504 GPIO_LOOKUP_IDX("GPIOE", 9, "bus", 4, GPIO_ACTIVE_HIGH),
505 GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
510 static void __init gta02_map_io(void)
512 s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
513 s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
514 s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_PWM4);
518 /* These are the guys that don't need to be children of PMU. */
520 static struct platform_device *gta02_devices[] __initdata = {
524 &s3c_device_usbgadget,
530 >a02_dfbmcs320_device,
531 >a02_buttons_device,
537 static void gta02_poweroff(void)
539 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
542 static void __init gta02_machine_init(void)
544 /* Set the panic callback to turn AUX LED on or off. */
545 panic_blink = gta02_panic_blink;
549 #ifdef CONFIG_CHARGER_PCF50633
550 INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
553 s3c24xx_udc_set_platdata(>a02_udc_cfg);
554 s3c24xx_ts_set_platdata(>a02_ts_info);
555 s3c_ohci_set_platdata(>a02_usb_info);
556 s3c_nand_set_platdata(>a02_nand_info);
557 s3c_i2c0_set_platdata(NULL);
559 i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
561 /* Configure the I2S pins (GPE0...GPE4) in correct mode */
562 s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
565 gpiod_add_lookup_table(>a02_udc_gpio_table);
566 gpiod_add_lookup_table(>a02_audio_gpio_table);
567 gpiod_add_lookup_table(>a02_mmc_gpio_table);
568 platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
569 pm_power_off = gta02_poweroff;
571 regulator_has_full_constraints();
574 static void __init gta02_init_time(void)
576 s3c2442_init_clocks(12000000);
577 s3c24xx_timer_init();
580 MACHINE_START(NEO1973_GTA02, "GTA02")
581 /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
582 .atag_offset = 0x100,
583 .nr_irqs = NR_IRQS_S3C2442,
584 .map_io = gta02_map_io,
585 .init_irq = s3c2442_init_irq,
586 .init_machine = gta02_machine_init,
587 .init_time = gta02_init_time,