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linux-next/arch/arm/mach-omap1/board-innovator.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

469 lines
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/*
* linux/arch/arm/mach-omap1/board-innovator.c
*
* Board specific inits for OMAP-1510 and OMAP-1610 Innovator
*
* Copyright (C) 2001 RidgeRun, Inc.
* Author: Greg Lonnon <glonnon@ridgerun.com>
*
* Copyright (C) 2002 MontaVista Software, Inc.
*
* Separated FPGA interrupts from innovator1510.c and cleaned up for 2.6
* Copyright (C) 2004 Nokia Corporation by Tony Lindrgen <tony@atomide.com>
*
* 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/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/input.h>
#include <linux/smc91x.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <plat/mux.h>
#include <plat/flash.h>
#include <plat/fpga.h>
#include <mach/gpio.h>
#include <plat/tc.h>
#include <plat/usb.h>
#include <plat/keypad.h>
#include <plat/common.h>
#include <plat/mmc.h>
/* At OMAP1610 Innovator the Ethernet is directly connected to CS1 */
#define INNOVATOR1610_ETHR_START 0x04000300
static int innovator_keymap[] = {
KEY(0, 0, KEY_F1),
KEY(0, 3, KEY_DOWN),
KEY(1, 1, KEY_F2),
KEY(1, 2, KEY_RIGHT),
KEY(2, 0, KEY_F3),
KEY(2, 1, KEY_F4),
KEY(2, 2, KEY_UP),
KEY(3, 2, KEY_ENTER),
KEY(3, 3, KEY_LEFT),
0
};
static struct mtd_partition innovator_partitions[] = {
/* bootloader (U-Boot, etc) in first sector */
{
.name = "bootloader",
.offset = 0,
.size = SZ_128K,
.mask_flags = MTD_WRITEABLE, /* force read-only */
},
/* bootloader params in the next sector */
{
.name = "params",
.offset = MTDPART_OFS_APPEND,
.size = SZ_128K,
.mask_flags = 0,
},
/* kernel */
{
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = SZ_2M,
.mask_flags = 0
},
/* rest of flash1 is a file system */
{
.name = "rootfs",
.offset = MTDPART_OFS_APPEND,
.size = SZ_16M - SZ_2M - 2 * SZ_128K,
.mask_flags = 0
},
/* file system */
{
.name = "filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0
}
};
static struct physmap_flash_data innovator_flash_data = {
.width = 2,
.set_vpp = omap1_set_vpp,
.parts = innovator_partitions,
.nr_parts = ARRAY_SIZE(innovator_partitions),
};
static struct resource innovator_flash_resource = {
.start = OMAP_CS0_PHYS,
.end = OMAP_CS0_PHYS + SZ_32M - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device innovator_flash_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &innovator_flash_data,
},
.num_resources = 1,
.resource = &innovator_flash_resource,
};
static struct resource innovator_kp_resources[] = {
[0] = {
.start = INT_KEYBOARD,
.end = INT_KEYBOARD,
.flags = IORESOURCE_IRQ,
},
};
static struct omap_kp_platform_data innovator_kp_data = {
.rows = 8,
.cols = 8,
.keymap = innovator_keymap,
.keymapsize = ARRAY_SIZE(innovator_keymap),
.delay = 4,
};
static struct platform_device innovator_kp_device = {
.name = "omap-keypad",
.id = -1,
.dev = {
.platform_data = &innovator_kp_data,
},
.num_resources = ARRAY_SIZE(innovator_kp_resources),
.resource = innovator_kp_resources,
};
static struct smc91x_platdata innovator_smc91x_info = {
.flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
.leda = RPC_LED_100_10,
.ledb = RPC_LED_TX_RX,
};
#ifdef CONFIG_ARCH_OMAP15XX
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
/* Only FPGA needs to be mapped here. All others are done with ioremap */
static struct map_desc innovator1510_io_desc[] __initdata = {
{
.virtual = OMAP1510_FPGA_BASE,
.pfn = __phys_to_pfn(OMAP1510_FPGA_START),
.length = OMAP1510_FPGA_SIZE,
.type = MT_DEVICE
}
};
static struct resource innovator1510_smc91x_resources[] = {
[0] = {
.start = OMAP1510_FPGA_ETHR_START, /* Physical */
.end = OMAP1510_FPGA_ETHR_START + 0xf,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = OMAP1510_INT_ETHER,
.end = OMAP1510_INT_ETHER,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
},
};
static struct platform_device innovator1510_smc91x_device = {
.name = "smc91x",
.id = 0,
.dev = {
.platform_data = &innovator_smc91x_info,
},
.num_resources = ARRAY_SIZE(innovator1510_smc91x_resources),
.resource = innovator1510_smc91x_resources,
};
static struct platform_device innovator1510_lcd_device = {
.name = "lcd_inn1510",
.id = -1,
};
static struct platform_device innovator1510_spi_device = {
.name = "spi_inn1510",
.id = -1,
};
static struct platform_device *innovator1510_devices[] __initdata = {
&innovator_flash_device,
&innovator1510_smc91x_device,
&innovator_kp_device,
&innovator1510_lcd_device,
&innovator1510_spi_device,
};
static int innovator_get_pendown_state(void)
{
return !(fpga_read(OMAP1510_FPGA_TOUCHSCREEN) & (1 << 5));
}
static const struct ads7846_platform_data innovator1510_ts_info = {
.model = 7846,
.vref_delay_usecs = 100, /* internal, no capacitor */
.x_plate_ohms = 419,
.y_plate_ohms = 486,
.get_pendown_state = innovator_get_pendown_state,
};
static struct spi_board_info __initdata innovator1510_boardinfo[] = { {
/* FPGA (bus "10") CS0 has an ads7846e */
.modalias = "ads7846",
.platform_data = &innovator1510_ts_info,
.irq = OMAP1510_INT_FPGA_TS,
.max_speed_hz = 120000 /* max sample rate at 3V */
* 26 /* command + data + overhead */,
.bus_num = 10,
.chip_select = 0,
} };
#endif /* CONFIG_ARCH_OMAP15XX */
#ifdef CONFIG_ARCH_OMAP16XX
static struct resource innovator1610_smc91x_resources[] = {
[0] = {
.start = INNOVATOR1610_ETHR_START, /* Physical */
.end = INNOVATOR1610_ETHR_START + 0xf,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = OMAP_GPIO_IRQ(0),
.end = OMAP_GPIO_IRQ(0),
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
},
};
static struct platform_device innovator1610_smc91x_device = {
.name = "smc91x",
.id = 0,
.dev = {
.platform_data = &innovator_smc91x_info,
},
.num_resources = ARRAY_SIZE(innovator1610_smc91x_resources),
.resource = innovator1610_smc91x_resources,
};
static struct platform_device innovator1610_lcd_device = {
.name = "inn1610_lcd",
.id = -1,
};
static struct platform_device *innovator1610_devices[] __initdata = {
&innovator_flash_device,
&innovator1610_smc91x_device,
&innovator_kp_device,
&innovator1610_lcd_device,
};
#endif /* CONFIG_ARCH_OMAP16XX */
static void __init innovator_init_smc91x(void)
{
if (cpu_is_omap1510()) {
fpga_write(fpga_read(OMAP1510_FPGA_RST) & ~1,
OMAP1510_FPGA_RST);
udelay(750);
} else {
if (gpio_request(0, "SMC91x irq") < 0) {
printk("Error requesting gpio 0 for smc91x irq\n");
return;
}
}
}
static void __init innovator_init_irq(void)
{
omap1_init_common_hw();
omap_init_irq();
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap1510()) {
omap1510_fpga_init_irq();
}
#endif
}
#ifdef CONFIG_ARCH_OMAP15XX
static struct omap_usb_config innovator1510_usb_config __initdata = {
/* for bundled non-standard host and peripheral cables */
.hmc_mode = 4,
.register_host = 1,
.pins[1] = 6,
.pins[2] = 6, /* Conflicts with UART2 */
.register_dev = 1,
.pins[0] = 2,
};
static struct omap_lcd_config innovator1510_lcd_config __initdata = {
.ctrl_name = "internal",
};
#endif
#ifdef CONFIG_ARCH_OMAP16XX
static struct omap_usb_config h2_usb_config __initdata = {
/* usb1 has a Mini-AB port and external isp1301 transceiver */
.otg = 2,
#ifdef CONFIG_USB_GADGET_OMAP
.hmc_mode = 19, /* 0:host(off) 1:dev|otg 2:disabled */
/* .hmc_mode = 21,*/ /* 0:host(off) 1:dev(loopback) 2:host(loopback) */
#elif defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
/* NONSTANDARD CABLE NEEDED (B-to-Mini-B) */
.hmc_mode = 20, /* 1:dev|otg(off) 1:host 2:disabled */
#endif
.pins[1] = 3,
};
static struct omap_lcd_config innovator1610_lcd_config __initdata = {
.ctrl_name = "internal",
};
#endif
#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
static int mmc_set_power(struct device *dev, int slot, int power_on,
int vdd)
{
if (power_on)
fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
OMAP1510_FPGA_POWER);
else
fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
OMAP1510_FPGA_POWER);
return 0;
}
/*
* Innovator could use the following functions tested:
* - mmc_get_wp that uses OMAP_MPUIO(3)
* - mmc_get_cover_state that uses FPGA F4 UIO43
*/
static struct omap_mmc_platform_data mmc1_data = {
.nr_slots = 1,
.slots[0] = {
.set_power = mmc_set_power,
.wires = 4,
.name = "mmcblk",
},
};
static struct omap_mmc_platform_data *mmc_data[OMAP16XX_NR_MMC];
void __init innovator_mmc_init(void)
{
mmc_data[0] = &mmc1_data;
omap1_init_mmc(mmc_data, OMAP15XX_NR_MMC);
}
#else
static inline void innovator_mmc_init(void)
{
}
#endif
static struct omap_board_config_kernel innovator_config[] = {
{ OMAP_TAG_LCD, NULL },
};
static void __init innovator_init(void)
{
innovator_init_smc91x();
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap1510()) {
unsigned char reg;
/* mux pins for uarts */
omap_cfg_reg(UART1_TX);
omap_cfg_reg(UART1_RTS);
omap_cfg_reg(UART2_TX);
omap_cfg_reg(UART2_RTS);
omap_cfg_reg(UART3_TX);
omap_cfg_reg(UART3_RX);
reg = fpga_read(OMAP1510_FPGA_POWER);
reg |= OMAP1510_FPGA_PCR_COM1_EN;
fpga_write(reg, OMAP1510_FPGA_POWER);
udelay(10);
reg = fpga_read(OMAP1510_FPGA_POWER);
reg |= OMAP1510_FPGA_PCR_COM2_EN;
fpga_write(reg, OMAP1510_FPGA_POWER);
udelay(10);
platform_add_devices(innovator1510_devices, ARRAY_SIZE(innovator1510_devices));
spi_register_board_info(innovator1510_boardinfo,
ARRAY_SIZE(innovator1510_boardinfo));
}
#endif
#ifdef CONFIG_ARCH_OMAP16XX
if (!cpu_is_omap1510()) {
platform_add_devices(innovator1610_devices, ARRAY_SIZE(innovator1610_devices));
}
#endif
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap1510()) {
omap1_usb_init(&innovator1510_usb_config);
innovator_config[1].data = &innovator1510_lcd_config;
}
#endif
#ifdef CONFIG_ARCH_OMAP16XX
if (cpu_is_omap1610()) {
omap1_usb_init(&h2_usb_config);
innovator_config[1].data = &innovator1610_lcd_config;
}
#endif
omap_board_config = innovator_config;
omap_board_config_size = ARRAY_SIZE(innovator_config);
omap_serial_init();
omap_register_i2c_bus(1, 100, NULL, 0);
innovator_mmc_init();
}
static void __init innovator_map_io(void)
{
omap1_map_common_io();
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap1510()) {
iotable_init(innovator1510_io_desc, ARRAY_SIZE(innovator1510_io_desc));
udelay(10); /* Delay needed for FPGA */
/* Dump the Innovator FPGA rev early - useful info for support. */
printk("Innovator FPGA Rev %d.%d Board Rev %d\n",
fpga_read(OMAP1510_FPGA_REV_HIGH),
fpga_read(OMAP1510_FPGA_REV_LOW),
fpga_read(OMAP1510_FPGA_BOARD_REV));
}
#endif
}
MACHINE_START(OMAP_INNOVATOR, "TI-Innovator")
/* Maintainer: MontaVista Software, Inc. */
.boot_params = 0x10000100,
.map_io = innovator_map_io,
.reserve = omap_reserve,
.init_irq = innovator_init_irq,
.init_machine = innovator_init,
.timer = &omap_timer,
MACHINE_END
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