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linux-next/arch/arm/mach-omap2/board-overo.c
Paul Walmsley b3c6df3ab2 OMAP2/3 board-*.c files: read bootloader configuration earlier 
Most board-*.c files read configuration data from the bootloader in
their .init_machine() function.  This needs to happen earlier, at some
point before omap2_init_common_hw() is called.  This is because a
future patch will use the bootloader serial console port information
to enable the UART clocks earlier, immediately after omap2_clk_init().
This is in turn necessary since otherwise clock tree usecounts on
clocks like dpll4_m2x2_ck will be bogus, which can cause the
currently-active console UART clock to be disabled during boot.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
2009-09-03 20:14:02 +03:00

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/*
* board-overo.c (Gumstix Overo)
*
* Initial code: Steve Sakoman <steve@sakoman.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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/i2c/twl4030.h>
#include <linux/regulator/machine.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <mach/board.h>
#include <mach/common.h>
#include <mach/gpio.h>
#include <mach/gpmc.h>
#include <mach/hardware.h>
#include <mach/nand.h>
#include <mach/mux.h>
#include <mach/usb.h>
#include "sdram-micron-mt46h32m32lf-6.h"
#include "mmc-twl4030.h"
#define OVERO_GPIO_BT_XGATE 15
#define OVERO_GPIO_W2W_NRESET 16
#define OVERO_GPIO_PENDOWN 114
#define OVERO_GPIO_BT_NRESET 164
#define OVERO_GPIO_USBH_CPEN 168
#define OVERO_GPIO_USBH_NRESET 183
#define NAND_BLOCK_SIZE SZ_128K
#define GPMC_CS0_BASE 0x60
#define GPMC_CS_SIZE 0x30
#define OVERO_SMSC911X_CS 5
#define OVERO_SMSC911X_GPIO 176
#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
#include <mach/mcspi.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
static struct omap2_mcspi_device_config ads7846_mcspi_config = {
.turbo_mode = 0,
.single_channel = 1, /* 0: slave, 1: master */
};
static int ads7846_get_pendown_state(void)
{
return !gpio_get_value(OVERO_GPIO_PENDOWN);
}
static struct ads7846_platform_data ads7846_config = {
.x_max = 0x0fff,
.y_max = 0x0fff,
.x_plate_ohms = 180,
.pressure_max = 255,
.debounce_max = 10,
.debounce_tol = 3,
.debounce_rep = 1,
.get_pendown_state = ads7846_get_pendown_state,
.keep_vref_on = 1,
};
static struct spi_board_info overo_spi_board_info[] __initdata = {
{
.modalias = "ads7846",
.bus_num = 1,
.chip_select = 0,
.max_speed_hz = 1500000,
.controller_data = &ads7846_mcspi_config,
.irq = OMAP_GPIO_IRQ(OVERO_GPIO_PENDOWN),
.platform_data = &ads7846_config,
}
};
static void __init overo_ads7846_init(void)
{
if ((gpio_request(OVERO_GPIO_PENDOWN, "ADS7846_PENDOWN") == 0) &&
(gpio_direction_input(OVERO_GPIO_PENDOWN) == 0)) {
gpio_export(OVERO_GPIO_PENDOWN, 0);
} else {
printk(KERN_ERR "could not obtain gpio for ADS7846_PENDOWN\n");
return;
}
spi_register_board_info(overo_spi_board_info,
ARRAY_SIZE(overo_spi_board_info));
}
#else
static inline void __init overo_ads7846_init(void) { return; }
#endif
#if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)
#include <linux/smsc911x.h>
static struct resource overo_smsc911x_resources[] = {
{
.name = "smsc911x-memory",
.flags = IORESOURCE_MEM,
},
{
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
},
};
static struct smsc911x_platform_config overo_smsc911x_config = {
.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
.irq_type = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
.flags = SMSC911X_USE_32BIT ,
.phy_interface = PHY_INTERFACE_MODE_MII,
};
static struct platform_device overo_smsc911x_device = {
.name = "smsc911x",
.id = -1,
.num_resources = ARRAY_SIZE(overo_smsc911x_resources),
.resource = overo_smsc911x_resources,
.dev = {
.platform_data = &overo_smsc911x_config,
},
};
static inline void __init overo_init_smsc911x(void)
{
unsigned long cs_mem_base;
if (gpmc_cs_request(OVERO_SMSC911X_CS, SZ_16M, &cs_mem_base) < 0) {
printk(KERN_ERR "Failed request for GPMC mem for smsc911x\n");
return;
}
overo_smsc911x_resources[0].start = cs_mem_base + 0x0;
overo_smsc911x_resources[0].end = cs_mem_base + 0xff;
if ((gpio_request(OVERO_SMSC911X_GPIO, "SMSC911X IRQ") == 0) &&
(gpio_direction_input(OVERO_SMSC911X_GPIO) == 0)) {
gpio_export(OVERO_SMSC911X_GPIO, 0);
} else {
printk(KERN_ERR "could not obtain gpio for SMSC911X IRQ\n");
return;
}
overo_smsc911x_resources[1].start = OMAP_GPIO_IRQ(OVERO_SMSC911X_GPIO);
overo_smsc911x_resources[1].end = 0;
platform_device_register(&overo_smsc911x_device);
}
#else
static inline void __init overo_init_smsc911x(void) { return; }
#endif
static struct mtd_partition overo_nand_partitions[] = {
{
.name = "xloader",
.offset = 0, /* Offset = 0x00000 */
.size = 4 * NAND_BLOCK_SIZE,
.mask_flags = MTD_WRITEABLE
},
{
.name = "uboot",
.offset = MTDPART_OFS_APPEND, /* Offset = 0x80000 */
.size = 14 * NAND_BLOCK_SIZE,
},
{
.name = "uboot environment",
.offset = MTDPART_OFS_APPEND, /* Offset = 0x240000 */
.size = 2 * NAND_BLOCK_SIZE,
},
{
.name = "linux",
.offset = MTDPART_OFS_APPEND, /* Offset = 0x280000 */
.size = 32 * NAND_BLOCK_SIZE,
},
{
.name = "rootfs",
.offset = MTDPART_OFS_APPEND, /* Offset = 0x680000 */
.size = MTDPART_SIZ_FULL,
},
};
static struct omap_nand_platform_data overo_nand_data = {
.parts = overo_nand_partitions,
.nr_parts = ARRAY_SIZE(overo_nand_partitions),
.dma_channel = -1, /* disable DMA in OMAP NAND driver */
};
static struct resource overo_nand_resource = {
.flags = IORESOURCE_MEM,
};
static struct platform_device overo_nand_device = {
.name = "omap2-nand",
.id = -1,
.dev = {
.platform_data = &overo_nand_data,
},
.num_resources = 1,
.resource = &overo_nand_resource,
};
static void __init overo_flash_init(void)
{
u8 cs = 0;
u8 nandcs = GPMC_CS_NUM + 1;
u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
/* find out the chip-select on which NAND exists */
while (cs < GPMC_CS_NUM) {
u32 ret = 0;
ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
if ((ret & 0xC00) == 0x800) {
printk(KERN_INFO "Found NAND on CS%d\n", cs);
if (nandcs > GPMC_CS_NUM)
nandcs = cs;
}
cs++;
}
if (nandcs > GPMC_CS_NUM) {
printk(KERN_INFO "NAND: Unable to find configuration "
"in GPMC\n ");
return;
}
if (nandcs < GPMC_CS_NUM) {
overo_nand_data.cs = nandcs;
overo_nand_data.gpmc_cs_baseaddr = (void *)
(gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
overo_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
if (platform_device_register(&overo_nand_device) < 0)
printk(KERN_ERR "Unable to register NAND device\n");
}
}
static struct twl4030_hsmmc_info mmc[] = {
{
.mmc = 1,
.wires = 4,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
},
{
.mmc = 2,
.wires = 4,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
.transceiver = true,
.ocr_mask = 0x00100000, /* 3.3V */
},
{} /* Terminator */
};
static struct regulator_consumer_supply overo_vmmc1_supply = {
.supply = "vmmc",
};
static int overo_twl_gpio_setup(struct device *dev,
unsigned gpio, unsigned ngpio)
{
twl4030_mmc_init(mmc);
overo_vmmc1_supply.dev = mmc[0].dev;
return 0;
}
static struct twl4030_gpio_platform_data overo_gpio_data = {
.gpio_base = OMAP_MAX_GPIO_LINES,
.irq_base = TWL4030_GPIO_IRQ_BASE,
.irq_end = TWL4030_GPIO_IRQ_END,
.setup = overo_twl_gpio_setup,
};
static struct twl4030_usb_data overo_usb_data = {
.usb_mode = T2_USB_MODE_ULPI,
};
static struct regulator_init_data overo_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 = &overo_vmmc1_supply,
};
/* mmc2 (WLAN) and Bluetooth don't use twl4030 regulators */
static struct twl4030_platform_data overo_twldata = {
.irq_base = TWL4030_IRQ_BASE,
.irq_end = TWL4030_IRQ_END,
.gpio = &overo_gpio_data,
.usb = &overo_usb_data,
.vmmc1 = &overo_vmmc1,
};
static struct i2c_board_info __initdata overo_i2c_boardinfo[] = {
{
I2C_BOARD_INFO("tps65950", 0x48),
.flags = I2C_CLIENT_WAKE,
.irq = INT_34XX_SYS_NIRQ,
.platform_data = &overo_twldata,
},
};
static int __init overo_i2c_init(void)
{
omap_register_i2c_bus(1, 2600, overo_i2c_boardinfo,
ARRAY_SIZE(overo_i2c_boardinfo));
/* i2c2 pins are used for gpio */
omap_register_i2c_bus(3, 400, NULL, 0);
return 0;
}
static struct platform_device overo_lcd_device = {
.name = "overo_lcd",
.id = -1,
};
static struct omap_lcd_config overo_lcd_config __initdata = {
.ctrl_name = "internal",
};
static struct omap_board_config_kernel overo_config[] __initdata = {
{ OMAP_TAG_LCD, &overo_lcd_config },
};
static void __init overo_init_irq(void)
{
omap_board_config = overo_config;
omap_board_config_size = ARRAY_SIZE(overo_config);
omap2_init_common_hw(mt46h32m32lf6_sdrc_params,
mt46h32m32lf6_sdrc_params);
omap_init_irq();
omap_gpio_init();
}
static struct platform_device *overo_devices[] __initdata = {
&overo_lcd_device,
};
static void __init overo_init(void)
{
overo_i2c_init();
platform_add_devices(overo_devices, ARRAY_SIZE(overo_devices));
omap_serial_init();
overo_flash_init();
usb_musb_init();
overo_ads7846_init();
overo_init_smsc911x();
/* Ensure SDRC pins are mux'd for self-refresh */
omap_cfg_reg(H16_34XX_SDRC_CKE0);
omap_cfg_reg(H17_34XX_SDRC_CKE1);
if ((gpio_request(OVERO_GPIO_W2W_NRESET,
"OVERO_GPIO_W2W_NRESET") == 0) &&
(gpio_direction_output(OVERO_GPIO_W2W_NRESET, 1) == 0)) {
gpio_export(OVERO_GPIO_W2W_NRESET, 0);
gpio_set_value(OVERO_GPIO_W2W_NRESET, 0);
udelay(10);
gpio_set_value(OVERO_GPIO_W2W_NRESET, 1);
} else {
printk(KERN_ERR "could not obtain gpio for "
"OVERO_GPIO_W2W_NRESET\n");
}
if ((gpio_request(OVERO_GPIO_BT_XGATE, "OVERO_GPIO_BT_XGATE") == 0) &&
(gpio_direction_output(OVERO_GPIO_BT_XGATE, 0) == 0))
gpio_export(OVERO_GPIO_BT_XGATE, 0);
else
printk(KERN_ERR "could not obtain gpio for OVERO_GPIO_BT_XGATE\n");
if ((gpio_request(OVERO_GPIO_BT_NRESET, "OVERO_GPIO_BT_NRESET") == 0) &&
(gpio_direction_output(OVERO_GPIO_BT_NRESET, 1) == 0)) {
gpio_export(OVERO_GPIO_BT_NRESET, 0);
gpio_set_value(OVERO_GPIO_BT_NRESET, 0);
mdelay(6);
gpio_set_value(OVERO_GPIO_BT_NRESET, 1);
} else {
printk(KERN_ERR "could not obtain gpio for "
"OVERO_GPIO_BT_NRESET\n");
}
if ((gpio_request(OVERO_GPIO_USBH_CPEN, "OVERO_GPIO_USBH_CPEN") == 0) &&
(gpio_direction_output(OVERO_GPIO_USBH_CPEN, 1) == 0))
gpio_export(OVERO_GPIO_USBH_CPEN, 0);
else
printk(KERN_ERR "could not obtain gpio for "
"OVERO_GPIO_USBH_CPEN\n");
if ((gpio_request(OVERO_GPIO_USBH_NRESET,
"OVERO_GPIO_USBH_NRESET") == 0) &&
(gpio_direction_output(OVERO_GPIO_USBH_NRESET, 1) == 0))
gpio_export(OVERO_GPIO_USBH_NRESET, 0);
else
printk(KERN_ERR "could not obtain gpio for "
"OVERO_GPIO_USBH_NRESET\n");
}
static void __init overo_map_io(void)
{
omap2_set_globals_343x();
omap2_map_common_io();
}
MACHINE_START(OVERO, "Gumstix Overo")
.phys_io = 0x48000000,
.io_pg_offst = ((0xd8000000) >> 18) & 0xfffc,
.boot_params = 0x80000100,
.map_io = overo_map_io,
.init_irq = overo_init_irq,
.init_machine = overo_init,
.timer = &omap_timer,
MACHINE_END
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