2 * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
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>
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.
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.
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,
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/input.h>
40 #include <linux/i2c.h>
42 #include <linux/mmc/host.h>
44 #include <linux/mfd/pcf50633/adc.h>
45 #include <linux/mfd/pcf50633/backlight.h>
46 #include <linux/mfd/pcf50633/core.h>
47 #include <linux/mfd/pcf50633/gpio.h>
48 #include <linux/mfd/pcf50633/mbc.h>
49 #include <linux/mfd/pcf50633/pmic.h>
51 #include <linux/mtd/mtd.h>
52 #include <linux/mtd/nand.h>
53 #include <linux/mtd/nand_ecc.h>
54 #include <linux/mtd/partitions.h>
55 #include <linux/mtd/physmap.h>
57 #include <linux/regulator/machine.h>
59 #include <linux/spi/spi.h>
60 #include <linux/spi/s3c24xx.h>
63 #include <asm/mach-types.h>
64 #include <asm/mach/arch.h>
65 #include <asm/mach/map.h>
66 #include <asm/mach/irq.h>
68 #include <linux/platform_data/i2c-s3c2410.h>
69 #include <linux/platform_data/mtd-nand-s3c2410.h>
70 #include <linux/platform_data/touchscreen-s3c2410.h>
71 #include <linux/platform_data/usb-ohci-s3c2410.h>
72 #include <linux/platform_data/usb-s3c2410_udc.h>
75 #include <mach/hardware.h>
76 #include <mach/regs-gpio.h>
77 #include <mach/regs-irq.h>
80 #include <plat/devs.h>
81 #include <plat/gpio-cfg.h>
83 #include <plat/regs-serial.h>
84 #include <plat/samsung-time.h>
89 static struct pcf50633 *gta02_pcf;
92 * This gets called frequently when we paniced.
95 static long gta02_panic_blink(int state)
100 led = (state) ? 1 : 0;
101 gpio_direction_output(GTA02_GPIO_AUX_LED, led);
107 static struct map_desc gta02_iodesc[] __initdata = {
109 .virtual = 0xe0000000,
110 .pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
116 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
117 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
118 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
120 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
144 #ifdef CONFIG_CHARGER_PCF50633
146 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
147 * We use this to recognize that we can pull 1A from the USB socket.
149 * These constants are the measured pcf50633 ADC levels with the 1A
150 * charger / 48K resistor, and with no pulldown resistor.
153 #define ADC_NOM_CHG_DETECT_1A 6
154 #define ADC_NOM_CHG_DETECT_USB 43
157 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
161 /* Interpret charger type */
162 if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
165 * Sanity - stop GPO driving out now that we have a 1A charger
166 * GPO controls USB Host power generation on GTA02
168 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
174 pcf50633_mbc_usb_curlim_set(pcf, ma);
177 static struct delayed_work gta02_charger_work;
178 static int gta02_usb_vbus_draw;
180 static void gta02_charger_worker(struct work_struct *work)
182 if (gta02_usb_vbus_draw) {
183 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
187 #ifdef CONFIG_PCF50633_ADC
188 pcf50633_adc_async_read(gta02_pcf,
189 PCF50633_ADCC1_MUX_ADCIN1,
190 PCF50633_ADCC1_AVERAGE_16,
191 gta02_configure_pmu_for_charger,
195 * If the PCF50633 ADC is disabled we fallback to a
196 * 100mA limit for safety.
198 pcf50633_mbc_usb_curlim_set(pcf, 100);
202 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
204 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
206 if (irq == PCF50633_IRQ_USBINS) {
207 schedule_delayed_work(>a02_charger_work,
208 GTA02_CHARGER_CONFIGURE_TIMEOUT);
213 if (irq == PCF50633_IRQ_USBREM) {
214 cancel_delayed_work_sync(>a02_charger_work);
215 gta02_usb_vbus_draw = 0;
219 static void gta02_udc_vbus_draw(unsigned int ma)
224 gta02_usb_vbus_draw = ma;
226 schedule_delayed_work(>a02_charger_work,
227 GTA02_CHARGER_CONFIGURE_TIMEOUT);
229 #else /* !CONFIG_CHARGER_PCF50633 */
230 #define gta02_pmu_event_callback NULL
231 #define gta02_udc_vbus_draw NULL
235 * This is called when pc50633 is probed, unfortunately quite late in the
236 * day since it is an I2C bus device. Here we can belatedly define some
237 * platform devices with the advantage that we can mark the pcf50633 as the
238 * parent. This makes them get suspended and resumed with their parent
239 * the pcf50633 still around.
242 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
245 static char *gta02_batteries[] = {
249 static struct pcf50633_bl_platform_data gta02_backlight_data = {
250 .default_brightness = 0x3f,
251 .default_brightness_limit = 0,
255 static struct pcf50633_platform_data gta02_pcf_pdata = {
257 [0] = PCF50633_INT1_USBINS |
258 PCF50633_INT1_USBREM |
260 [1] = PCF50633_INT2_ONKEYF,
261 [2] = PCF50633_INT3_ONKEY1S,
262 [3] = PCF50633_INT4_LOWSYS |
263 PCF50633_INT4_LOWBAT |
264 PCF50633_INT4_HIGHTMP,
267 .batteries = gta02_batteries,
268 .num_batteries = ARRAY_SIZE(gta02_batteries),
270 .charger_reference_current_ma = 1000,
272 .backlight_data = >a02_backlight_data,
275 [PCF50633_REGULATOR_AUTO] = {
279 .valid_modes_mask = REGULATOR_MODE_NORMAL,
284 [PCF50633_REGULATOR_DOWN1] = {
288 .valid_modes_mask = REGULATOR_MODE_NORMAL,
293 [PCF50633_REGULATOR_DOWN2] = {
297 .valid_modes_mask = REGULATOR_MODE_NORMAL,
302 [PCF50633_REGULATOR_HCLDO] = {
306 .valid_modes_mask = REGULATOR_MODE_NORMAL,
307 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
308 REGULATOR_CHANGE_STATUS,
311 [PCF50633_REGULATOR_LDO1] = {
315 .valid_modes_mask = REGULATOR_MODE_NORMAL,
316 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
320 [PCF50633_REGULATOR_LDO2] = {
324 .valid_modes_mask = REGULATOR_MODE_NORMAL,
328 [PCF50633_REGULATOR_LDO3] = {
332 .valid_modes_mask = REGULATOR_MODE_NORMAL,
336 [PCF50633_REGULATOR_LDO4] = {
340 .valid_modes_mask = REGULATOR_MODE_NORMAL,
341 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
345 [PCF50633_REGULATOR_LDO5] = {
349 .valid_modes_mask = REGULATOR_MODE_NORMAL,
350 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
354 [PCF50633_REGULATOR_LDO6] = {
358 .valid_modes_mask = REGULATOR_MODE_NORMAL,
361 [PCF50633_REGULATOR_MEMLDO] = {
365 .valid_modes_mask = REGULATOR_MODE_NORMAL,
370 .probe_done = gta02_pmu_attach_child_devices,
371 .mbc_event_callback = gta02_pmu_event_callback,
377 #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
378 #define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
380 static struct physmap_flash_data gta02_nor_flash_data = {
384 static struct resource gta02_nor_flash_resource =
385 DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
387 static struct platform_device gta02_nor_flash = {
388 .name = "physmap-flash",
391 .platform_data = >a02_nor_flash_data,
393 .resource = >a02_nor_flash_resource,
398 static struct platform_device s3c24xx_pwm_device = {
399 .name = "s3c24xx_pwm",
403 static struct platform_device gta02_dfbmcs320_device = {
407 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
409 I2C_BOARD_INFO("pcf50633", 0x73),
410 .irq = GTA02_IRQ_PCF50633,
411 .platform_data = >a02_pcf_pdata,
414 I2C_BOARD_INFO("wm8753", 0x1a),
418 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
421 * This name is also hard-coded in the boot loaders, so
422 * changing it would would require all users to upgrade
423 * their boot loaders, some of which are stored in a NOR
424 * that is considered to be immutable.
426 .name = "neo1973-nand",
433 * Choose a set of timings derived from S3C@2442B MCP54
434 * data sheet (K5D2G13ACM-D075 MCP Memory).
437 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
441 .nr_sets = ARRAY_SIZE(gta02_nand_sets),
442 .sets = gta02_nand_sets,
446 /* Get PMU to set USB current limit accordingly. */
447 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
448 .vbus_draw = gta02_udc_vbus_draw,
449 .pullup_pin = GTA02_GPIO_USB_PULLUP,
453 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
455 .flags = S3C_HCDFLG_USED,
463 static struct s3c2410_ts_mach_info gta02_ts_info = {
465 .presc = 0xff, /* slow as we can go */
466 .oversampling_shift = 2,
470 static struct gpio_keys_button gta02_buttons[] = {
472 .gpio = GTA02_GPIO_AUX_KEY,
476 .debounce_interval = 100,
479 .gpio = GTA02_GPIO_HOLD_KEY,
483 .debounce_interval = 100,
487 static struct gpio_keys_platform_data gta02_buttons_pdata = {
488 .buttons = gta02_buttons,
489 .nbuttons = ARRAY_SIZE(gta02_buttons),
492 static struct platform_device gta02_buttons_device = {
496 .platform_data = >a02_buttons_pdata,
500 static void __init gta02_map_io(void)
502 s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
503 s3c24xx_init_clocks(12000000);
504 s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
505 samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
509 /* These are the guys that don't need to be children of PMU. */
511 static struct platform_device *gta02_devices[] __initdata = {
515 &s3c_device_usbgadget,
521 >a02_dfbmcs320_device,
522 >a02_buttons_device,
527 /* These guys DO need to be children of PMU. */
529 static struct platform_device *gta02_devices_pmu_children[] = {
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
543 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
547 /* Grab a copy of the now probed PMU pointer. */
550 for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
551 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
553 platform_add_devices(gta02_devices_pmu_children,
554 ARRAY_SIZE(gta02_devices_pmu_children));
557 static void gta02_poweroff(void)
559 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
562 static void __init gta02_machine_init(void)
564 /* Set the panic callback to turn AUX LED on or off. */
565 panic_blink = gta02_panic_blink;
569 #ifdef CONFIG_CHARGER_PCF50633
570 INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
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);
579 i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
581 platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
582 pm_power_off = gta02_poweroff;
584 regulator_has_full_constraints();
588 MACHINE_START(NEO1973_GTA02, "GTA02")
589 /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
590 .atag_offset = 0x100,
591 .map_io = gta02_map_io,
592 .init_irq = s3c2442_init_irq,
593 .init_machine = gta02_machine_init,
594 .init_time = samsung_timer_init,
595 .restart = s3c244x_restart,