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>
88 static struct pcf50633
*gta02_pcf
;
91 * This gets called frequently when we paniced.
94 static long gta02_panic_blink(int state
)
99 led
= (state
) ? 1 : 0;
100 gpio_direction_output(GTA02_GPIO_AUX_LED
, led
);
106 static struct map_desc gta02_iodesc
[] __initdata
= {
108 .virtual = 0xe0000000,
109 .pfn
= __phys_to_pfn(S3C2410_CS3
+ 0x01000000),
115 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
116 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
117 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
119 static struct s3c2410_uartcfg gta02_uartcfgs
[] = {
143 #ifdef CONFIG_CHARGER_PCF50633
145 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
146 * We use this to recognize that we can pull 1A from the USB socket.
148 * These constants are the measured pcf50633 ADC levels with the 1A
149 * charger / 48K resistor, and with no pulldown resistor.
152 #define ADC_NOM_CHG_DETECT_1A 6
153 #define ADC_NOM_CHG_DETECT_USB 43
156 gta02_configure_pmu_for_charger(struct pcf50633
*pcf
, void *unused
, int res
)
160 /* Interpret charger type */
161 if (res
< ((ADC_NOM_CHG_DETECT_USB
+ ADC_NOM_CHG_DETECT_1A
) / 2)) {
164 * Sanity - stop GPO driving out now that we have a 1A charger
165 * GPO controls USB Host power generation on GTA02
167 pcf50633_gpio_set(pcf
, PCF50633_GPO
, 0);
173 pcf50633_mbc_usb_curlim_set(pcf
, ma
);
176 static struct delayed_work gta02_charger_work
;
177 static int gta02_usb_vbus_draw
;
179 static void gta02_charger_worker(struct work_struct
*work
)
181 if (gta02_usb_vbus_draw
) {
182 pcf50633_mbc_usb_curlim_set(gta02_pcf
, gta02_usb_vbus_draw
);
186 #ifdef CONFIG_PCF50633_ADC
187 pcf50633_adc_async_read(gta02_pcf
,
188 PCF50633_ADCC1_MUX_ADCIN1
,
189 PCF50633_ADCC1_AVERAGE_16
,
190 gta02_configure_pmu_for_charger
,
194 * If the PCF50633 ADC is disabled we fallback to a
195 * 100mA limit for safety.
197 pcf50633_mbc_usb_curlim_set(pcf
, 100);
201 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
203 static void gta02_pmu_event_callback(struct pcf50633
*pcf
, int irq
)
205 if (irq
== PCF50633_IRQ_USBINS
) {
206 schedule_delayed_work(>a02_charger_work
,
207 GTA02_CHARGER_CONFIGURE_TIMEOUT
);
212 if (irq
== PCF50633_IRQ_USBREM
) {
213 cancel_delayed_work_sync(>a02_charger_work
);
214 gta02_usb_vbus_draw
= 0;
218 static void gta02_udc_vbus_draw(unsigned int ma
)
223 gta02_usb_vbus_draw
= ma
;
225 schedule_delayed_work(>a02_charger_work
,
226 GTA02_CHARGER_CONFIGURE_TIMEOUT
);
228 #else /* !CONFIG_CHARGER_PCF50633 */
229 #define gta02_pmu_event_callback NULL
230 #define gta02_udc_vbus_draw NULL
234 * This is called when pc50633 is probed, unfortunately quite late in the
235 * day since it is an I2C bus device. Here we can belatedly define some
236 * platform devices with the advantage that we can mark the pcf50633 as the
237 * parent. This makes them get suspended and resumed with their parent
238 * the pcf50633 still around.
241 static void gta02_pmu_attach_child_devices(struct pcf50633
*pcf
);
244 static char *gta02_batteries
[] = {
248 static struct pcf50633_bl_platform_data gta02_backlight_data
= {
249 .default_brightness
= 0x3f,
250 .default_brightness_limit
= 0,
254 static struct pcf50633_platform_data gta02_pcf_pdata
= {
256 [0] = PCF50633_INT1_USBINS
|
257 PCF50633_INT1_USBREM
|
259 [1] = PCF50633_INT2_ONKEYF
,
260 [2] = PCF50633_INT3_ONKEY1S
,
261 [3] = PCF50633_INT4_LOWSYS
|
262 PCF50633_INT4_LOWBAT
|
263 PCF50633_INT4_HIGHTMP
,
266 .batteries
= gta02_batteries
,
267 .num_batteries
= ARRAY_SIZE(gta02_batteries
),
269 .charger_reference_current_ma
= 1000,
271 .backlight_data
= >a02_backlight_data
,
274 [PCF50633_REGULATOR_AUTO
] = {
278 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
283 [PCF50633_REGULATOR_DOWN1
] = {
287 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
292 [PCF50633_REGULATOR_DOWN2
] = {
296 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
301 [PCF50633_REGULATOR_HCLDO
] = {
305 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
306 .valid_ops_mask
= REGULATOR_CHANGE_VOLTAGE
|
307 REGULATOR_CHANGE_STATUS
,
310 [PCF50633_REGULATOR_LDO1
] = {
314 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
315 .valid_ops_mask
= REGULATOR_CHANGE_STATUS
,
319 [PCF50633_REGULATOR_LDO2
] = {
323 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
327 [PCF50633_REGULATOR_LDO3
] = {
331 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
335 [PCF50633_REGULATOR_LDO4
] = {
339 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
340 .valid_ops_mask
= REGULATOR_CHANGE_STATUS
,
344 [PCF50633_REGULATOR_LDO5
] = {
348 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
349 .valid_ops_mask
= REGULATOR_CHANGE_STATUS
,
353 [PCF50633_REGULATOR_LDO6
] = {
357 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
360 [PCF50633_REGULATOR_MEMLDO
] = {
364 .valid_modes_mask
= REGULATOR_MODE_NORMAL
,
369 .probe_done
= gta02_pmu_attach_child_devices
,
370 .mbc_event_callback
= gta02_pmu_event_callback
,
376 #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
377 #define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */
379 static struct physmap_flash_data gta02_nor_flash_data
= {
383 static struct resource gta02_nor_flash_resource
=
384 DEFINE_RES_MEM(GTA02_FLASH_BASE
, GTA02_FLASH_SIZE
);
386 static struct platform_device gta02_nor_flash
= {
387 .name
= "physmap-flash",
390 .platform_data
= >a02_nor_flash_data
,
392 .resource
= >a02_nor_flash_resource
,
397 static struct platform_device s3c24xx_pwm_device
= {
398 .name
= "s3c24xx_pwm",
402 static struct platform_device gta02_dfbmcs320_device
= {
406 static struct i2c_board_info gta02_i2c_devs
[] __initdata
= {
408 I2C_BOARD_INFO("pcf50633", 0x73),
409 .irq
= GTA02_IRQ_PCF50633
,
410 .platform_data
= >a02_pcf_pdata
,
413 I2C_BOARD_INFO("wm8753", 0x1a),
417 static struct s3c2410_nand_set __initdata gta02_nand_sets
[] = {
420 * This name is also hard-coded in the boot loaders, so
421 * changing it would would require all users to upgrade
422 * their boot loaders, some of which are stored in a NOR
423 * that is considered to be immutable.
425 .name
= "neo1973-nand",
432 * Choose a set of timings derived from S3C@2442B MCP54
433 * data sheet (K5D2G13ACM-D075 MCP Memory).
436 static struct s3c2410_platform_nand __initdata gta02_nand_info
= {
440 .nr_sets
= ARRAY_SIZE(gta02_nand_sets
),
441 .sets
= gta02_nand_sets
,
445 /* Get PMU to set USB current limit accordingly. */
446 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata
= {
447 .vbus_draw
= gta02_udc_vbus_draw
,
448 .pullup_pin
= GTA02_GPIO_USB_PULLUP
,
452 static struct s3c2410_hcd_info gta02_usb_info __initdata
= {
454 .flags
= S3C_HCDFLG_USED
,
462 static struct s3c2410_ts_mach_info gta02_ts_info
= {
464 .presc
= 0xff, /* slow as we can go */
465 .oversampling_shift
= 2,
469 static struct gpio_keys_button gta02_buttons
[] = {
471 .gpio
= GTA02_GPIO_AUX_KEY
,
475 .debounce_interval
= 100,
478 .gpio
= GTA02_GPIO_HOLD_KEY
,
482 .debounce_interval
= 100,
486 static struct gpio_keys_platform_data gta02_buttons_pdata
= {
487 .buttons
= gta02_buttons
,
488 .nbuttons
= ARRAY_SIZE(gta02_buttons
),
491 static struct platform_device gta02_buttons_device
= {
495 .platform_data
= >a02_buttons_pdata
,
499 static void __init
gta02_map_io(void)
501 s3c24xx_init_io(gta02_iodesc
, ARRAY_SIZE(gta02_iodesc
));
502 s3c24xx_init_clocks(12000000);
503 s3c24xx_init_uarts(gta02_uartcfgs
, ARRAY_SIZE(gta02_uartcfgs
));
507 /* These are the guys that don't need to be children of PMU. */
509 static struct platform_device
*gta02_devices
[] __initdata
= {
513 &s3c_device_usbgadget
,
519 >a02_dfbmcs320_device
,
520 >a02_buttons_device
,
525 /* These guys DO need to be children of PMU. */
527 static struct platform_device
*gta02_devices_pmu_children
[] = {
532 * This is called when pc50633 is probed, quite late in the day since it is an
533 * I2C bus device. Here we can define platform devices with the advantage that
534 * we can mark the pcf50633 as the parent. This makes them get suspended and
535 * resumed with their parent the pcf50633 still around. All devices whose
536 * operation depends on something from pcf50633 must have this relationship
537 * made explicit like this, or suspend and resume will become an unreliable
541 static void gta02_pmu_attach_child_devices(struct pcf50633
*pcf
)
545 /* Grab a copy of the now probed PMU pointer. */
548 for (n
= 0; n
< ARRAY_SIZE(gta02_devices_pmu_children
); n
++)
549 gta02_devices_pmu_children
[n
]->dev
.parent
= pcf
->dev
;
551 platform_add_devices(gta02_devices_pmu_children
,
552 ARRAY_SIZE(gta02_devices_pmu_children
));
555 static void gta02_poweroff(void)
557 pcf50633_reg_set_bit_mask(gta02_pcf
, PCF50633_REG_OOCSHDWN
, 1, 1);
560 static void __init
gta02_machine_init(void)
562 /* Set the panic callback to turn AUX LED on or off. */
563 panic_blink
= gta02_panic_blink
;
567 #ifdef CONFIG_CHARGER_PCF50633
568 INIT_DELAYED_WORK(>a02_charger_work
, gta02_charger_worker
);
571 s3c24xx_udc_set_platdata(>a02_udc_cfg
);
572 s3c24xx_ts_set_platdata(>a02_ts_info
);
573 s3c_ohci_set_platdata(>a02_usb_info
);
574 s3c_nand_set_platdata(>a02_nand_info
);
575 s3c_i2c0_set_platdata(NULL
);
577 i2c_register_board_info(0, gta02_i2c_devs
, ARRAY_SIZE(gta02_i2c_devs
));
579 platform_add_devices(gta02_devices
, ARRAY_SIZE(gta02_devices
));
580 pm_power_off
= gta02_poweroff
;
582 regulator_has_full_constraints();
586 MACHINE_START(NEO1973_GTA02
, "GTA02")
587 /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
588 .atag_offset
= 0x100,
589 .map_io
= gta02_map_io
,
590 .init_irq
= s3c24xx_init_irq
,
591 .init_machine
= gta02_machine_init
,
592 .init_time
= s3c24xx_timer_init
,
593 .restart
= s3c244x_restart
,