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android_kernel_motorola_sm6225/arch/arm/mach-omap1/board-h2.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

467 lines
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/*
* linux/arch/arm/mach-omap1/board-h2.c
*
* Board specific inits for OMAP-1610 H2
*
* 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>
*
* H2 specific changes and cleanup
* Copyright (C) 2004 Nokia Corporation by Imre Deak <imre.deak@nokia.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/platform_device.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/input.h>
#include <linux/i2c/tps65010.h>
#include <linux/smc91x.h>
#include <mach/hardware.h>
#include <asm/gpio.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <plat/mux.h>
#include <plat/dma.h>
#include <plat/tc.h>
#include <plat/irda.h>
#include <plat/usb.h>
#include <plat/keypad.h>
#include <plat/common.h>
#include <plat/flash.h>
#include "board-h2.h"
/* At OMAP1610 Innovator the Ethernet is directly connected to CS1 */
#define OMAP1610_ETHR_START 0x04000300
static int h2_keymap[] = {
KEY(0, 0, KEY_LEFT),
KEY(0, 1, KEY_RIGHT),
KEY(0, 2, KEY_3),
KEY(0, 3, KEY_F10),
KEY(0, 4, KEY_F5),
KEY(0, 5, KEY_9),
KEY(1, 0, KEY_DOWN),
KEY(1, 1, KEY_UP),
KEY(1, 2, KEY_2),
KEY(1, 3, KEY_F9),
KEY(1, 4, KEY_F7),
KEY(1, 5, KEY_0),
KEY(2, 0, KEY_ENTER),
KEY(2, 1, KEY_6),
KEY(2, 2, KEY_1),
KEY(2, 3, KEY_F2),
KEY(2, 4, KEY_F6),
KEY(2, 5, KEY_HOME),
KEY(3, 0, KEY_8),
KEY(3, 1, KEY_5),
KEY(3, 2, KEY_F12),
KEY(3, 3, KEY_F3),
KEY(3, 4, KEY_F8),
KEY(3, 5, KEY_END),
KEY(4, 0, KEY_7),
KEY(4, 1, KEY_4),
KEY(4, 2, KEY_F11),
KEY(4, 3, KEY_F1),
KEY(4, 4, KEY_F4),
KEY(4, 5, KEY_ESC),
KEY(5, 0, KEY_F13),
KEY(5, 1, KEY_F14),
KEY(5, 2, KEY_F15),
KEY(5, 3, KEY_F16),
KEY(5, 4, KEY_SLEEP),
0
};
static struct mtd_partition h2_nor_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
},
/* file system */
{
.name = "filesystem",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0
}
};
static struct physmap_flash_data h2_nor_data = {
.width = 2,
.set_vpp = omap1_set_vpp,
.parts = h2_nor_partitions,
.nr_parts = ARRAY_SIZE(h2_nor_partitions),
};
static struct resource h2_nor_resource = {
/* This is on CS3, wherever it's mapped */
.flags = IORESOURCE_MEM,
};
static struct platform_device h2_nor_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &h2_nor_data,
},
.num_resources = 1,
.resource = &h2_nor_resource,
};
static struct mtd_partition h2_nand_partitions[] = {
#if 0
/* REVISIT: enable these partitions if you make NAND BOOT
* work on your H2 (rev C or newer); published versions of
* x-load only support P2 and H3.
*/
{
.name = "xloader",
.offset = 0,
.size = 64 * 1024,
.mask_flags = MTD_WRITEABLE, /* force read-only */
},
{
.name = "bootloader",
.offset = MTDPART_OFS_APPEND,
.size = 256 * 1024,
.mask_flags = MTD_WRITEABLE, /* force read-only */
},
{
.name = "params",
.offset = MTDPART_OFS_APPEND,
.size = 192 * 1024,
},
{
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = 2 * SZ_1M,
},
#endif
{
.name = "filesystem",
.size = MTDPART_SIZ_FULL,
.offset = MTDPART_OFS_APPEND,
},
};
static void h2_nand_cmd_ctl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
unsigned long mask;
if (cmd == NAND_CMD_NONE)
return;
mask = (ctrl & NAND_CLE) ? 0x02 : 0;
if (ctrl & NAND_ALE)
mask |= 0x04;
writeb(cmd, (unsigned long)this->IO_ADDR_W | mask);
}
#define H2_NAND_RB_GPIO_PIN 62
static int h2_nand_dev_ready(struct mtd_info *mtd)
{
return gpio_get_value(H2_NAND_RB_GPIO_PIN);
}
static const char *h2_part_probes[] = { "cmdlinepart", NULL };
struct platform_nand_data h2_nand_platdata = {
.chip = {
.nr_chips = 1,
.chip_offset = 0,
.nr_partitions = ARRAY_SIZE(h2_nand_partitions),
.partitions = h2_nand_partitions,
.options = NAND_SAMSUNG_LP_OPTIONS,
.part_probe_types = h2_part_probes,
},
.ctrl = {
.cmd_ctrl = h2_nand_cmd_ctl,
.dev_ready = h2_nand_dev_ready,
},
};
static struct resource h2_nand_resource = {
.flags = IORESOURCE_MEM,
};
static struct platform_device h2_nand_device = {
.name = "gen_nand",
.id = 0,
.dev = {
.platform_data = &h2_nand_platdata,
},
.num_resources = 1,
.resource = &h2_nand_resource,
};
static struct smc91x_platdata h2_smc91x_info = {
.flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
.leda = RPC_LED_100_10,
.ledb = RPC_LED_TX_RX,
};
static struct resource h2_smc91x_resources[] = {
[0] = {
.start = OMAP1610_ETHR_START, /* Physical */
.end = OMAP1610_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 h2_smc91x_device = {
.name = "smc91x",
.id = 0,
.dev = {
.platform_data = &h2_smc91x_info,
},
.num_resources = ARRAY_SIZE(h2_smc91x_resources),
.resource = h2_smc91x_resources,
};
static struct resource h2_kp_resources[] = {
[0] = {
.start = INT_KEYBOARD,
.end = INT_KEYBOARD,
.flags = IORESOURCE_IRQ,
},
};
static struct omap_kp_platform_data h2_kp_data = {
.rows = 8,
.cols = 8,
.keymap = h2_keymap,
.keymapsize = ARRAY_SIZE(h2_keymap),
.rep = 1,
.delay = 9,
.dbounce = 1,
};
static struct platform_device h2_kp_device = {
.name = "omap-keypad",
.id = -1,
.dev = {
.platform_data = &h2_kp_data,
},
.num_resources = ARRAY_SIZE(h2_kp_resources),
.resource = h2_kp_resources,
};
#define H2_IRDA_FIRSEL_GPIO_PIN 17
static struct omap_irda_config h2_irda_data = {
.transceiver_cap = IR_SIRMODE | IR_MIRMODE | IR_FIRMODE,
.rx_channel = OMAP_DMA_UART3_RX,
.tx_channel = OMAP_DMA_UART3_TX,
.dest_start = UART3_THR,
.src_start = UART3_RHR,
.tx_trigger = 0,
.rx_trigger = 0,
};
static struct resource h2_irda_resources[] = {
[0] = {
.start = INT_UART3,
.end = INT_UART3,
.flags = IORESOURCE_IRQ,
},
};
static u64 irda_dmamask = 0xffffffff;
static struct platform_device h2_irda_device = {
.name = "omapirda",
.id = 0,
.dev = {
.platform_data = &h2_irda_data,
.dma_mask = &irda_dmamask,
},
.num_resources = ARRAY_SIZE(h2_irda_resources),
.resource = h2_irda_resources,
};
static struct platform_device h2_lcd_device = {
.name = "lcd_h2",
.id = -1,
};
static struct platform_device *h2_devices[] __initdata = {
&h2_nor_device,
&h2_nand_device,
&h2_smc91x_device,
&h2_irda_device,
&h2_kp_device,
&h2_lcd_device,
};
static void __init h2_init_smc91x(void)
{
if (gpio_request(0, "SMC91x irq") < 0) {
printk("Error requesting gpio 0 for smc91x irq\n");
return;
}
}
static int tps_setup(struct i2c_client *client, void *context)
{
tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V |
TPS_LDO1_ENABLE | TPS_VLDO1_3_0V);
return 0;
}
static struct tps65010_board tps_board = {
.base = H2_TPS_GPIO_BASE,
.outmask = 0x0f,
.setup = tps_setup,
};
static struct i2c_board_info __initdata h2_i2c_board_info[] = {
{
I2C_BOARD_INFO("tps65010", 0x48),
.irq = OMAP_GPIO_IRQ(58),
.platform_data = &tps_board,
}, {
I2C_BOARD_INFO("isp1301_omap", 0x2d),
.irq = OMAP_GPIO_IRQ(2),
},
};
static void __init h2_init_irq(void)
{
omap1_init_common_hw();
omap_init_irq();
}
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)
/* needs OTG cable, or NONSTANDARD (B-to-MiniB) */
.hmc_mode = 20, /* 1:dev|otg(off) 1:host 2:disabled */
#endif
.pins[1] = 3,
};
static struct omap_lcd_config h2_lcd_config __initdata = {
.ctrl_name = "internal",
};
static struct omap_board_config_kernel h2_config[] __initdata = {
{ OMAP_TAG_LCD, &h2_lcd_config },
};
static void __init h2_init(void)
{
h2_init_smc91x();
/* Here we assume the NOR boot config: NOR on CS3 (possibly swapped
* to address 0 by a dip switch), NAND on CS2B. The NAND driver will
* notice whether a NAND chip is enabled at probe time.
*
* FIXME revC boards (and H3) support NAND-boot, with a dip switch to
* put NOR on CS2B and NAND (which on H2 may be 16bit) on CS3. Try
* detecting that in code here, to avoid probing every possible flash
* configuration...
*/
h2_nor_resource.end = h2_nor_resource.start = omap_cs3_phys();
h2_nor_resource.end += SZ_32M - 1;
h2_nand_resource.end = h2_nand_resource.start = OMAP_CS2B_PHYS;
h2_nand_resource.end += SZ_4K - 1;
if (gpio_request(H2_NAND_RB_GPIO_PIN, "NAND ready") < 0)
BUG();
gpio_direction_input(H2_NAND_RB_GPIO_PIN);
omap_cfg_reg(L3_1610_FLASH_CS2B_OE);
omap_cfg_reg(M8_1610_FLASH_CS2B_WE);
/* MMC: card detect and WP */
/* omap_cfg_reg(U19_ARMIO1); */ /* CD */
omap_cfg_reg(BALLOUT_V8_ARMIO3); /* WP */
/* Mux pins for keypad */
omap_cfg_reg(F18_1610_KBC0);
omap_cfg_reg(D20_1610_KBC1);
omap_cfg_reg(D19_1610_KBC2);
omap_cfg_reg(E18_1610_KBC3);
omap_cfg_reg(C21_1610_KBC4);
omap_cfg_reg(G18_1610_KBR0);
omap_cfg_reg(F19_1610_KBR1);
omap_cfg_reg(H14_1610_KBR2);
omap_cfg_reg(E20_1610_KBR3);
omap_cfg_reg(E19_1610_KBR4);
omap_cfg_reg(N19_1610_KBR5);
platform_add_devices(h2_devices, ARRAY_SIZE(h2_devices));
omap_board_config = h2_config;
omap_board_config_size = ARRAY_SIZE(h2_config);
omap_serial_init();
omap_register_i2c_bus(1, 100, h2_i2c_board_info,
ARRAY_SIZE(h2_i2c_board_info));
omap1_usb_init(&h2_usb_config);
h2_mmc_init();
}
static void __init h2_map_io(void)
{
omap1_map_common_io();
}
MACHINE_START(OMAP_H2, "TI-H2")
/* Maintainer: Imre Deak <imre.deak@nokia.com> */
.boot_params = 0x10000100,
.map_io = h2_map_io,
.reserve = omap_reserve,
.init_irq = h2_init_irq,
.init_machine = h2_init,
.timer = &omap_timer,
MACHINE_END
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