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linux/arch/arm/mach-omap2/board-igep0030.c
Varadarajan, Charulatha 77640aabd7 OMAP: GPIO: Implement GPIO as a platform device 
Implement GPIO as a platform device.

GPIO APIs are used in machine_init functions. Hence it is
required to complete GPIO probe before board_init. Therefore
GPIO device register and driver register are implemented as
postcore_initcalls.

omap_gpio_init() does nothing now and this function would be
removed in the next patch as it's usage is spread across most
of the board files.

Inorder to convert GPIO as platform device, modifications are
required in clockxxxx_data.c file for OMAP1 so that device names
can be used to obtain clock instead of getting clocks by
name/NULL ptr.

Use runtime pm APIs (pm_runtime_put*/pm_runtime_get*) for enabling
or disabling the clocks, modify sysconfig settings and remove usage
of clock FW APIs.
Note 1: Converting GPIO driver to use runtime PM APIs is not done as a
separate patch because GPIO clock names are different for various OMAPs
and are different for some of the banks in the same CPU. This would need
usage of cpu_is checks and bank id checks while using clock FW APIs in
the gpio driver. Hence while making GPIO a platform driver framework,
PM runtime APIs are used directly.

Note 2: While implementing GPIO as a platform device, pm runtime APIs
are used as mentioned above and modification is not done in gpio's
prepare for idle/ resume after idle functions. This would be done
in the next patch series and GPIO driver would be made to use dev_pm_ops
instead of sysdev_class in that series only.

Due to the above, the GPIO driver implicitly relies on
CM_AUTOIDLE = 1 on its iclk for power management to work, since the
driver never disables its iclk.
This would be taken care in the next patch series (see Note 3 below).

Refer to
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg39112.html
for more details.

Note 3: only pm_runtime_get_sync is called in gpio's probe() and
pm_runtime_put* is never called. This is to make the implementation
similar to the existing GPIO code. Another patch series would be sent
to correct this.

In OMAP3 and OMAP4 gpio's debounce clocks are optional clocks. They
are enabled/ disabled whenever required using clock framework APIs

TODO:
1. Cleanup the GPIO driver. Use function pointers and register
offest pointers instead of using hardcoded values
2. Remove all cpu_is_ checks and OMAP specific macros
3. Remove usage of gpio_bank array so that only
   instance specific information is used in driver code
4. Rename 'method'/ avoid it's usage
5. Fix the non-wakeup gpios handling for OMAP2430, OMAP3 & OMAP4
6. Modify gpio's prepare for idle/ resume after idle functions
   to use runtime pm implentation.

Signed-off-by: Charulatha V <charu@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Reviewed-by: Basak, Partha <p-basak2@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
[tony@atomide.com: updated for bank specific revision and updated boards]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-07 16:26:57 -08:00

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/*
* Copyright (C) 2010 - ISEE 2007 SL
*
* Modified from mach-omap2/board-generic.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/regulator/machine.h>
#include <linux/i2c/twl.h>
#include <linux/mmc/host.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <plat/board.h>
#include <plat/common.h>
#include <plat/gpmc.h>
#include <plat/usb.h>
#include <plat/onenand.h>
#include "mux.h"
#include "hsmmc.h"
#include "sdram-numonyx-m65kxxxxam.h"
#define IGEP3_GPIO_LED0_GREEN 54
#define IGEP3_GPIO_LED0_RED 53
#define IGEP3_GPIO_LED1_RED 16
#define IGEP3_GPIO_WIFI_NPD 138
#define IGEP3_GPIO_WIFI_NRESET 139
#define IGEP3_GPIO_BT_NRESET 137
#define IGEP3_GPIO_USBH_NRESET 115
#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
#define ONENAND_MAP 0x20000000
/*
* x2 Flash built-in COMBO POP MEMORY
* Since the device is equipped with two DataRAMs, and two-plane NAND
* Flash memory array, these two component enables simultaneous program
* of 4KiB. Plane1 has only even blocks such as block0, block2, block4
* while Plane2 has only odd blocks such as block1, block3, block5.
* So MTD regards it as 4KiB page size and 256KiB block size 64*(2*2048)
*/
static struct mtd_partition igep3_onenand_partitions[] = {
{
.name = "X-Loader",
.offset = 0,
.size = 2 * (64*(2*2048))
},
{
.name = "U-Boot",
.offset = MTDPART_OFS_APPEND,
.size = 6 * (64*(2*2048)),
},
{
.name = "Environment",
.offset = MTDPART_OFS_APPEND,
.size = 2 * (64*(2*2048)),
},
{
.name = "Kernel",
.offset = MTDPART_OFS_APPEND,
.size = 12 * (64*(2*2048)),
},
{
.name = "File System",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
static struct omap_onenand_platform_data igep3_onenand_pdata = {
.parts = igep3_onenand_partitions,
.nr_parts = ARRAY_SIZE(igep3_onenand_partitions),
.onenand_setup = NULL,
.dma_channel = -1, /* disable DMA in OMAP OneNAND driver */
};
static struct platform_device igep3_onenand_device = {
.name = "omap2-onenand",
.id = -1,
.dev = {
.platform_data = &igep3_onenand_pdata,
},
};
void __init igep3_flash_init(void)
{
u8 cs = 0;
u8 onenandcs = GPMC_CS_NUM + 1;
for (cs = 0; cs < GPMC_CS_NUM; cs++) {
u32 ret;
ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
/* Check if NAND/oneNAND is configured */
if ((ret & 0xC00) == 0x800)
/* NAND found */
pr_err("IGEP3: Unsupported NAND found\n");
else {
ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
if ((ret & 0x3F) == (ONENAND_MAP >> 24))
/* OneNAND found */
onenandcs = cs;
}
}
if (onenandcs > GPMC_CS_NUM) {
pr_err("IGEP3: Unable to find configuration in GPMC\n");
return;
}
igep3_onenand_pdata.cs = onenandcs;
if (platform_device_register(&igep3_onenand_device) < 0)
pr_err("IGEP3: Unable to register OneNAND device\n");
}
#else
void __init igep3_flash_init(void) {}
#endif
static struct regulator_consumer_supply igep3_vmmc1_supply = {
.supply = "vmmc",
};
/* VMMC1 for OMAP VDD_MMC1 (i/o) and MMC1 card */
static struct regulator_init_data igep3_vmmc1 = {
.constraints = {
.min_uV = 1850000,
.max_uV = 3150000,
.valid_modes_mask = REGULATOR_MODE_NORMAL
| REGULATOR_MODE_STANDBY,
.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE
| REGULATOR_CHANGE_MODE
| REGULATOR_CHANGE_STATUS,
},
.num_consumer_supplies = 1,
.consumer_supplies = &igep3_vmmc1_supply,
};
static struct omap2_hsmmc_info mmc[] = {
[0] = {
.mmc = 1,
.caps = MMC_CAP_4_BIT_DATA,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
},
#if defined(CONFIG_LIBERTAS_SDIO) || defined(CONFIG_LIBERTAS_SDIO_MODULE)
[1] = {
.mmc = 2,
.caps = MMC_CAP_4_BIT_DATA,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
},
#endif
{} /* Terminator */
};
#if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
#include <linux/leds.h>
static struct gpio_led igep3_gpio_leds[] = {
[0] = {
.name = "gpio-led:red:d0",
.gpio = IGEP3_GPIO_LED0_RED,
.default_trigger = "default-off"
},
[1] = {
.name = "gpio-led:green:d0",
.gpio = IGEP3_GPIO_LED0_GREEN,
.default_trigger = "default-off",
},
[2] = {
.name = "gpio-led:red:d1",
.gpio = IGEP3_GPIO_LED1_RED,
.default_trigger = "default-off",
},
[3] = {
.name = "gpio-led:green:d1",
.default_trigger = "heartbeat",
.gpio = -EINVAL, /* gets replaced */
},
};
static struct gpio_led_platform_data igep3_led_pdata = {
.leds = igep3_gpio_leds,
.num_leds = ARRAY_SIZE(igep3_gpio_leds),
};
static struct platform_device igep3_led_device = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &igep3_led_pdata,
},
};
static void __init igep3_leds_init(void)
{
platform_device_register(&igep3_led_device);
}
#else
static inline void igep3_leds_init(void)
{
if ((gpio_request(IGEP3_GPIO_LED0_RED, "gpio-led:red:d0") == 0) &&
(gpio_direction_output(IGEP3_GPIO_LED0_RED, 1) == 0)) {
gpio_export(IGEP3_GPIO_LED0_RED, 0);
gpio_set_value(IGEP3_GPIO_LED0_RED, 1);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_LED0_RED\n");
if ((gpio_request(IGEP3_GPIO_LED0_GREEN, "gpio-led:green:d0") == 0) &&
(gpio_direction_output(IGEP3_GPIO_LED0_GREEN, 1) == 0)) {
gpio_export(IGEP3_GPIO_LED0_GREEN, 0);
gpio_set_value(IGEP3_GPIO_LED0_GREEN, 1);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_LED0_GREEN\n");
if ((gpio_request(IGEP3_GPIO_LED1_RED, "gpio-led:red:d1") == 0) &&
(gpio_direction_output(IGEP3_GPIO_LED1_RED, 1) == 0)) {
gpio_export(IGEP3_GPIO_LED1_RED, 0);
gpio_set_value(IGEP3_GPIO_LED1_RED, 1);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_LED1_RED\n");
}
#endif
static int igep3_twl4030_gpio_setup(struct device *dev,
unsigned gpio, unsigned ngpio)
{
/* gpio + 0 is "mmc0_cd" (input/IRQ) */
mmc[0].gpio_cd = gpio + 0;
omap2_hsmmc_init(mmc);
/*
* link regulators to MMC adapters ... we "know" the
* regulators will be set up only *after* we return.
*/
igep3_vmmc1_supply.dev = mmc[0].dev;
/* TWL4030_GPIO_MAX + 1 == ledB (out, active low LED) */
#if !defined(CONFIG_LEDS_GPIO) && !defined(CONFIG_LEDS_GPIO_MODULE)
if ((gpio_request(gpio+TWL4030_GPIO_MAX+1, "gpio-led:green:d1") == 0)
&& (gpio_direction_output(gpio + TWL4030_GPIO_MAX + 1, 1) == 0)) {
gpio_export(gpio + TWL4030_GPIO_MAX + 1, 0);
gpio_set_value(gpio + TWL4030_GPIO_MAX + 1, 0);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_LED1_GREEN\n");
#else
igep3_gpio_leds[3].gpio = gpio + TWL4030_GPIO_MAX + 1;
#endif
return 0;
};
static struct twl4030_gpio_platform_data igep3_twl4030_gpio_pdata = {
.gpio_base = OMAP_MAX_GPIO_LINES,
.irq_base = TWL4030_GPIO_IRQ_BASE,
.irq_end = TWL4030_GPIO_IRQ_END,
.use_leds = true,
.setup = igep3_twl4030_gpio_setup,
};
static struct twl4030_usb_data igep3_twl4030_usb_data = {
.usb_mode = T2_USB_MODE_ULPI,
};
static void __init igep3_init_irq(void)
{
omap2_init_common_hw(m65kxxxxam_sdrc_params, m65kxxxxam_sdrc_params);
omap_init_irq();
}
static struct twl4030_platform_data igep3_twl4030_pdata = {
.irq_base = TWL4030_IRQ_BASE,
.irq_end = TWL4030_IRQ_END,
/* platform_data for children goes here */
.usb = &igep3_twl4030_usb_data,
.gpio = &igep3_twl4030_gpio_pdata,
.vmmc1 = &igep3_vmmc1,
};
static struct i2c_board_info __initdata igep3_i2c_boardinfo[] = {
{
I2C_BOARD_INFO("twl4030", 0x48),
.flags = I2C_CLIENT_WAKE,
.irq = INT_34XX_SYS_NIRQ,
.platform_data = &igep3_twl4030_pdata,
},
};
static int __init igep3_i2c_init(void)
{
omap_register_i2c_bus(1, 2600, igep3_i2c_boardinfo,
ARRAY_SIZE(igep3_i2c_boardinfo));
return 0;
}
static struct omap_musb_board_data musb_board_data = {
.interface_type = MUSB_INTERFACE_ULPI,
.mode = MUSB_OTG,
.power = 100,
};
#if defined(CONFIG_LIBERTAS_SDIO) || defined(CONFIG_LIBERTAS_SDIO_MODULE)
static void __init igep3_wifi_bt_init(void)
{
/* Configure MUX values for W-LAN + Bluetooth GPIO's */
omap_mux_init_gpio(IGEP3_GPIO_WIFI_NPD, OMAP_PIN_OUTPUT);
omap_mux_init_gpio(IGEP3_GPIO_WIFI_NRESET, OMAP_PIN_OUTPUT);
omap_mux_init_gpio(IGEP3_GPIO_BT_NRESET, OMAP_PIN_OUTPUT);
/* Set GPIO's for W-LAN + Bluetooth combo module */
if ((gpio_request(IGEP3_GPIO_WIFI_NPD, "GPIO_WIFI_NPD") == 0) &&
(gpio_direction_output(IGEP3_GPIO_WIFI_NPD, 1) == 0)) {
gpio_export(IGEP3_GPIO_WIFI_NPD, 0);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_WIFI_NPD\n");
if ((gpio_request(IGEP3_GPIO_WIFI_NRESET, "GPIO_WIFI_NRESET") == 0) &&
(gpio_direction_output(IGEP3_GPIO_WIFI_NRESET, 1) == 0)) {
gpio_export(IGEP3_GPIO_WIFI_NRESET, 0);
gpio_set_value(IGEP3_GPIO_WIFI_NRESET, 0);
udelay(10);
gpio_set_value(IGEP3_GPIO_WIFI_NRESET, 1);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_WIFI_NRESET\n");
if ((gpio_request(IGEP3_GPIO_BT_NRESET, "GPIO_BT_NRESET") == 0) &&
(gpio_direction_output(IGEP3_GPIO_BT_NRESET, 1) == 0)) {
gpio_export(IGEP3_GPIO_BT_NRESET, 0);
} else
pr_warning("IGEP3: Could not obtain gpio GPIO_BT_NRESET\n");
}
#else
void __init igep3_wifi_bt_init(void) {}
#endif
#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
{ .reg_offset = OMAP_MUX_TERMINATOR },
};
#else
#define board_mux NULL
#endif
static void __init igep3_init(void)
{
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
/* Register I2C busses and drivers */
igep3_i2c_init();
omap_serial_init();
usb_musb_init(&musb_board_data);
igep3_flash_init();
igep3_leds_init();
/*
* WLAN-BT combo module from MuRata wich has a Marvell WLAN
* (88W8686) + CSR Bluetooth chipset. Uses SDIO interface.
*/
igep3_wifi_bt_init();
}
MACHINE_START(IGEP0030, "IGEP OMAP3 module")
.boot_params = 0x80000100,
.map_io = omap3_map_io,
.init_irq = igep3_init_irq,
.init_machine = igep3_init,
.timer = &omap_timer,
MACHINE_END
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