2 * linux/arch/arm/mach-s3c2442/mach-gta02.c
4 * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
6 * Copyright (C) 2006-2009 by Openmoko, Inc.
7 * Authors: Harald Welte <laforge@openmoko.org>
8 * Andy Green <andy@openmoko.org>
9 * Werner Almesberger <werner@openmoko.org>
10 * All rights reserved.
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <linux/kernel.h>
30 #include <linux/types.h>
31 #include <linux/interrupt.h>
32 #include <linux/list.h>
33 #include <linux/delay.h>
34 #include <linux/timer.h>
35 #include <linux/init.h>
36 #include <linux/gpio.h>
37 #include <linux/workqueue.h>
38 #include <linux/platform_device.h>
39 #include <linux/serial_core.h>
40 #include <linux/spi/spi.h>
42 #include <linux/mmc/host.h>
44 #include <linux/mtd/mtd.h>
45 #include <linux/mtd/nand.h>
46 #include <linux/mtd/nand_ecc.h>
47 #include <linux/mtd/partitions.h>
48 #include <linux/mtd/physmap.h>
51 #include <linux/i2c.h>
52 #include <linux/regulator/machine.h>
54 #include <linux/mfd/pcf50633/core.h>
55 #include <linux/mfd/pcf50633/mbc.h>
56 #include <linux/mfd/pcf50633/adc.h>
57 #include <linux/mfd/pcf50633/gpio.h>
58 #include <linux/mfd/pcf50633/pmic.h>
59 #include <linux/mfd/pcf50633/backlight.h>
61 #include <linux/input.h>
62 #include <linux/gpio_keys.h>
64 #include <asm/mach/arch.h>
65 #include <asm/mach/map.h>
66 #include <asm/mach/irq.h>
69 #include <asm/mach-types.h>
71 #include <mach/regs-irq.h>
72 #include <mach/regs-gpio.h>
73 #include <mach/regs-gpioj.h>
77 #include <mach/spi-gpio.h>
78 #include <plat/usb-control.h>
79 #include <mach/regs-mem.h>
80 #include <mach/hardware.h>
82 #include <mach/gta02.h>
84 #include <plat/regs-serial.h>
85 #include <plat/nand.h>
86 #include <plat/devs.h>
90 #include <plat/gpio-cfg.h>
95 static struct pcf50633 *gta02_pcf;
98 * This gets called frequently when we paniced.
101 static long gta02_panic_blink(int state)
106 led = (state) ? 1 : 0;
107 gpio_direction_output(GTA02_GPIO_AUX_LED, led);
113 static struct map_desc gta02_iodesc[] __initdata = {
115 .virtual = 0xe0000000,
116 .pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
122 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
123 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
124 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
126 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
150 #ifdef CONFIG_CHARGER_PCF50633
152 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
153 * We use this to recognize that we can pull 1A from the USB socket.
155 * These constants are the measured pcf50633 ADC levels with the 1A
156 * charger / 48K resistor, and with no pulldown resistor.
159 #define ADC_NOM_CHG_DETECT_1A 6
160 #define ADC_NOM_CHG_DETECT_USB 43
163 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
167 /* Interpret charger type */
168 if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
171 * Sanity - stop GPO driving out now that we have a 1A charger
172 * GPO controls USB Host power generation on GTA02
174 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
180 pcf50633_mbc_usb_curlim_set(pcf, ma);
183 static struct delayed_work gta02_charger_work;
184 static int gta02_usb_vbus_draw;
186 static void gta02_charger_worker(struct work_struct *work)
188 if (gta02_usb_vbus_draw) {
189 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
193 #ifdef CONFIG_PCF50633_ADC
194 pcf50633_adc_async_read(gta02_pcf,
195 PCF50633_ADCC1_MUX_ADCIN1,
196 PCF50633_ADCC1_AVERAGE_16,
197 gta02_configure_pmu_for_charger,
201 * If the PCF50633 ADC is disabled we fallback to a
202 * 100mA limit for safety.
204 pcf50633_mbc_usb_curlim_set(pcf, 100);
208 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
210 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
212 if (irq == PCF50633_IRQ_USBINS) {
213 schedule_delayed_work(>a02_charger_work,
214 GTA02_CHARGER_CONFIGURE_TIMEOUT);
219 if (irq == PCF50633_IRQ_USBREM) {
220 cancel_delayed_work_sync(>a02_charger_work);
221 gta02_usb_vbus_draw = 0;
225 static void gta02_udc_vbus_draw(unsigned int ma)
230 gta02_usb_vbus_draw = ma;
232 schedule_delayed_work(>a02_charger_work,
233 GTA02_CHARGER_CONFIGURE_TIMEOUT);
235 #else /* !CONFIG_CHARGER_PCF50633 */
236 #define gta02_pmu_event_callback NULL
237 #define gta02_udc_vbus_draw NULL
241 * This is called when pc50633 is probed, unfortunately quite late in the
242 * day since it is an I2C bus device. Here we can belatedly define some
243 * platform devices with the advantage that we can mark the pcf50633 as the
244 * parent. This makes them get suspended and resumed with their parent
245 * the pcf50633 still around.
248 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
251 static char *gta02_batteries[] = {
255 static struct pcf50633_bl_platform_data gta02_backlight_data = {
256 .default_brightness = 0x3f,
257 .default_brightness_limit = 0,
261 struct pcf50633_platform_data gta02_pcf_pdata = {
263 [0] = PCF50633_INT1_USBINS |
264 PCF50633_INT1_USBREM |
266 [1] = PCF50633_INT2_ONKEYF,
267 [2] = PCF50633_INT3_ONKEY1S,
268 [3] = PCF50633_INT4_LOWSYS |
269 PCF50633_INT4_LOWBAT |
270 PCF50633_INT4_HIGHTMP,
273 .batteries = gta02_batteries,
274 .num_batteries = ARRAY_SIZE(gta02_batteries),
276 .charger_reference_current_ma = 1000,
278 .backlight_data = >a02_backlight_data,
281 [PCF50633_REGULATOR_AUTO] = {
285 .valid_modes_mask = REGULATOR_MODE_NORMAL,
290 [PCF50633_REGULATOR_DOWN1] = {
294 .valid_modes_mask = REGULATOR_MODE_NORMAL,
299 [PCF50633_REGULATOR_DOWN2] = {
303 .valid_modes_mask = REGULATOR_MODE_NORMAL,
308 [PCF50633_REGULATOR_HCLDO] = {
312 .valid_modes_mask = REGULATOR_MODE_NORMAL,
313 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
314 REGULATOR_CHANGE_STATUS,
317 [PCF50633_REGULATOR_LDO1] = {
321 .valid_modes_mask = REGULATOR_MODE_NORMAL,
322 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
326 [PCF50633_REGULATOR_LDO2] = {
330 .valid_modes_mask = REGULATOR_MODE_NORMAL,
334 [PCF50633_REGULATOR_LDO3] = {
338 .valid_modes_mask = REGULATOR_MODE_NORMAL,
342 [PCF50633_REGULATOR_LDO4] = {
346 .valid_modes_mask = REGULATOR_MODE_NORMAL,
347 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
351 [PCF50633_REGULATOR_LDO5] = {
355 .valid_modes_mask = REGULATOR_MODE_NORMAL,
356 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
360 [PCF50633_REGULATOR_LDO6] = {
364 .valid_modes_mask = REGULATOR_MODE_NORMAL,
367 [PCF50633_REGULATOR_MEMLDO] = {
371 .valid_modes_mask = REGULATOR_MODE_NORMAL,
376 .probe_done = gta02_pmu_attach_child_devices,
377 .mbc_event_callback = gta02_pmu_event_callback,
383 #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
384 #define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
386 static struct physmap_flash_data gta02_nor_flash_data = {
390 static struct resource gta02_nor_flash_resource = {
391 .start = GTA02_FLASH_BASE,
392 .end = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
393 .flags = IORESOURCE_MEM,
396 static struct platform_device gta02_nor_flash = {
397 .name = "physmap-flash",
400 .platform_data = >a02_nor_flash_data,
402 .resource = >a02_nor_flash_resource,
407 struct platform_device s3c24xx_pwm_device = {
408 .name = "s3c24xx_pwm",
412 static struct platform_device gta02_dfbmcs320_device = {
416 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
418 I2C_BOARD_INFO("pcf50633", 0x73),
419 .irq = GTA02_IRQ_PCF50633,
420 .platform_data = >a02_pcf_pdata,
423 I2C_BOARD_INFO("wm8753", 0x1a),
427 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
430 * This name is also hard-coded in the boot loaders, so
431 * changing it would would require all users to upgrade
432 * their boot loaders, some of which are stored in a NOR
433 * that is considered to be immutable.
435 .name = "neo1973-nand",
442 * Choose a set of timings derived from S3C@2442B MCP54
443 * data sheet (K5D2G13ACM-D075 MCP Memory).
446 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
450 .nr_sets = ARRAY_SIZE(gta02_nand_sets),
451 .sets = gta02_nand_sets,
455 /* Get PMU to set USB current limit accordingly. */
456 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
457 .vbus_draw = gta02_udc_vbus_draw,
458 .pullup_pin = GTA02_GPIO_USB_PULLUP,
462 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
464 .flags = S3C_HCDFLG_USED,
472 static struct s3c2410_ts_mach_info gta02_ts_info = {
474 .presc = 0xff, /* slow as we can go */
475 .oversampling_shift = 2,
479 static struct gpio_keys_button gta02_buttons[] = {
481 .gpio = GTA02_GPIO_AUX_KEY,
485 .debounce_interval = 100,
488 .gpio = GTA02_GPIO_HOLD_KEY,
492 .debounce_interval = 100,
496 static struct gpio_keys_platform_data gta02_buttons_pdata = {
497 .buttons = gta02_buttons,
498 .nbuttons = ARRAY_SIZE(gta02_buttons),
501 static struct platform_device gta02_buttons_device = {
505 .platform_data = >a02_buttons_pdata,
509 static void __init gta02_map_io(void)
511 s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
512 s3c24xx_init_clocks(12000000);
513 s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
517 /* These are the guys that don't need to be children of PMU. */
519 static struct platform_device *gta02_devices[] __initdata = {
523 &s3c_device_usbgadget,
530 >a02_dfbmcs320_device,
531 >a02_buttons_device,
536 /* These guys DO need to be children of PMU. */
538 static struct platform_device *gta02_devices_pmu_children[] = {
543 * This is called when pc50633 is probed, quite late in the day since it is an
544 * I2C bus device. Here we can define platform devices with the advantage that
545 * we can mark the pcf50633 as the parent. This makes them get suspended and
546 * resumed with their parent the pcf50633 still around. All devices whose
547 * operation depends on something from pcf50633 must have this relationship
548 * made explicit like this, or suspend and resume will become an unreliable
552 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
556 /* Grab a copy of the now probed PMU pointer. */
559 for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
560 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
562 platform_add_devices(gta02_devices_pmu_children,
563 ARRAY_SIZE(gta02_devices_pmu_children));
566 static void gta02_poweroff(void)
568 pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
571 static void __init gta02_machine_init(void)
573 /* Set the panic callback to turn AUX LED on or off. */
574 panic_blink = gta02_panic_blink;
578 #ifdef CONFIG_CHARGER_PCF50633
579 INIT_DELAYED_WORK(>a02_charger_work, gta02_charger_worker);
582 s3c24xx_udc_set_platdata(>a02_udc_cfg);
583 s3c24xx_ts_set_platdata(>a02_ts_info);
584 s3c_ohci_set_platdata(>a02_usb_info);
585 s3c_nand_set_platdata(>a02_nand_info);
586 s3c_i2c0_set_platdata(NULL);
588 i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
590 platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
591 pm_power_off = gta02_poweroff;
593 regulator_has_full_constraints();
597 MACHINE_START(NEO1973_GTA02, "GTA02")
598 /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
599 .boot_params = S3C2410_SDRAM_PA + 0x100,
600 .map_io = gta02_map_io,
601 .init_irq = s3c24xx_init_irq,
602 .init_machine = gta02_machine_init,
603 .timer = &s3c24xx_timer,