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linux-sg2042/arch/arm/mach-stmp378x/stmp378x_devb.c

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/*
* Freescale STMP378X development board support
*
* Embedded Alley Solutions, Inc <source@embeddedalley.com>
*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/spi/spi.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/pins.h>
#include <mach/pinmux.h>
#include <mach/platform.h>
#include <mach/stmp3xxx.h>
#include <mach/mmc.h>
#include <mach/gpmi.h>
#include "stmp378x.h"
static struct platform_device *devices[] = {
&stmp3xxx_dbguart,
&stmp3xxx_appuart,
&stmp3xxx_watchdog,
&stmp3xxx_touchscreen,
&stmp3xxx_rtc,
&stmp3xxx_keyboard,
&stmp3xxx_framebuffer,
&stmp3xxx_backlight,
&stmp3xxx_rotdec,
&stmp3xxx_persistent,
&stmp3xxx_dcp_bootstream,
&stmp3xxx_dcp,
&stmp3xxx_battery,
&stmp378x_pxp,
&stmp378x_i2c,
};
static struct pin_desc i2c_pins_desc[] = {
{ PINID_I2C_SCL, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_I2C_SDA, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
};
static struct pin_group i2c_pins = {
.pins = i2c_pins_desc,
.nr_pins = ARRAY_SIZE(i2c_pins_desc),
};
static struct pin_desc dbguart_pins_0[] = {
{ PINID_PWM0, PIN_FUN3, },
{ PINID_PWM1, PIN_FUN3, },
};
static struct pin_group dbguart_pins[] = {
[0] = {
.pins = dbguart_pins_0,
.nr_pins = ARRAY_SIZE(dbguart_pins_0),
},
};
static int dbguart_pins_control(int id, int request)
{
int r = 0;
if (request)
r = stmp3xxx_request_pin_group(&dbguart_pins[id], "debug uart");
else
stmp3xxx_release_pin_group(&dbguart_pins[id], "debug uart");
return r;
}
static struct pin_desc appuart_pins_0[] = {
{ PINID_AUART1_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
{ PINID_AUART1_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
{ PINID_AUART1_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
{ PINID_AUART1_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
};
static struct pin_desc appuart_pins_1[] = {
#if 0 /* enable these when second appuart will be connected */
{ PINID_AUART2_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
{ PINID_AUART2_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
{ PINID_AUART2_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
{ PINID_AUART2_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
#endif
};
static struct pin_desc mmc_pins_desc[] = {
{ PINID_SSP1_DATA0, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
{ PINID_SSP1_DATA1, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
{ PINID_SSP1_DATA2, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
{ PINID_SSP1_DATA3, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
{ PINID_SSP1_CMD, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
{ PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
{ PINID_SSP1_DETECT, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
};
static struct pin_group mmc_pins = {
.pins = mmc_pins_desc,
.nr_pins = ARRAY_SIZE(mmc_pins_desc),
};
static int stmp3xxxmmc_get_wp(void)
{
return gpio_get_value(PINID_PWM4);
}
static int stmp3xxxmmc_hw_init_ssp1(void)
{
int ret;
ret = stmp3xxx_request_pin_group(&mmc_pins, "mmc");
if (ret)
goto out;
/* Configure write protect GPIO pin */
ret = gpio_request(PINID_PWM4, "mmc wp");
if (ret)
goto out_wp;
gpio_direction_input(PINID_PWM4);
/* Configure POWER pin as gpio to drive power to MMC slot */
ret = gpio_request(PINID_PWM3, "mmc power");
if (ret)
goto out_power;
gpio_direction_output(PINID_PWM3, 0);
mdelay(100);
return 0;
out_power:
gpio_free(PINID_PWM4);
out_wp:
stmp3xxx_release_pin_group(&mmc_pins, "mmc");
out:
return ret;
}
static void stmp3xxxmmc_hw_release_ssp1(void)
{
gpio_free(PINID_PWM3);
gpio_free(PINID_PWM4);
stmp3xxx_release_pin_group(&mmc_pins, "mmc");
}
static void stmp3xxxmmc_cmd_pullup_ssp1(int enable)
{
stmp3xxx_pin_pullup(PINID_SSP1_CMD, enable, "mmc");
}
static unsigned long
stmp3xxxmmc_setclock_ssp1(void __iomem *base, unsigned long hz)
{
struct clk *ssp, *parent;
char *p;
long r;
ssp = clk_get(NULL, "ssp");
/* using SSP1, no timeout, clock rate 1 */
writel(BF(2, SSP_TIMING_CLOCK_DIVIDE) |
BF(0xFFFF, SSP_TIMING_TIMEOUT),
base + HW_SSP_TIMING);
p = (hz > 1000000) ? "io" : "osc_24M";
parent = clk_get(NULL, p);
clk_set_parent(ssp, parent);
r = clk_set_rate(ssp, 2 * hz / 1000);
clk_put(parent);
clk_put(ssp);
return hz;
}
static struct stmp3xxxmmc_platform_data mmc_data = {
.hw_init = stmp3xxxmmc_hw_init_ssp1,
.hw_release = stmp3xxxmmc_hw_release_ssp1,
.get_wp = stmp3xxxmmc_get_wp,
.cmd_pullup = stmp3xxxmmc_cmd_pullup_ssp1,
.setclock = stmp3xxxmmc_setclock_ssp1,
};
static struct pin_group appuart_pins[] = {
[0] = {
.pins = appuart_pins_0,
.nr_pins = ARRAY_SIZE(appuart_pins_0),
},
[1] = {
.pins = appuart_pins_1,
.nr_pins = ARRAY_SIZE(appuart_pins_1),
},
};
static struct pin_desc ssp1_pins_desc[] = {
{ PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0, },
{ PINID_SSP1_CMD, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
{ PINID_SSP1_DATA0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
{ PINID_SSP1_DATA3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
};
static struct pin_desc ssp2_pins_desc[] = {
{ PINID_GPMI_WRN, PIN_FUN3, PIN_8MA, PIN_3_3V, 0, },
{ PINID_GPMI_RDY1, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
{ PINID_GPMI_D00, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
{ PINID_GPMI_D03, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
};
static struct pin_group ssp1_pins = {
.pins = ssp1_pins_desc,
.nr_pins = ARRAY_SIZE(ssp1_pins_desc),
};
static struct pin_group ssp2_pins = {
.pins = ssp1_pins_desc,
.nr_pins = ARRAY_SIZE(ssp2_pins_desc),
};
static struct pin_desc gpmi_pins_desc[] = {
{ PINID_GPMI_CE0N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_CE1N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GMPI_CE2N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_CLE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_ALE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_WPN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_RDY1, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D00, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D01, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D02, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D03, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D04, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D05, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D06, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_D07, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_RDY0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_RDY2, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_RDY3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
{ PINID_GPMI_WRN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
{ PINID_GPMI_RDN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
};
static struct pin_group gpmi_pins = {
.pins = gpmi_pins_desc,
.nr_pins = ARRAY_SIZE(gpmi_pins_desc),
};
static struct mtd_partition gpmi_partitions[] = {
[0] = {
.name = "boot",
.size = 10 * SZ_1M,
.offset = 0,
},
[1] = {
.name = "data",
.size = MTDPART_SIZ_FULL,
.offset = MTDPART_OFS_APPEND,
},
};
static struct gpmi_platform_data gpmi_data = {
.pins = &gpmi_pins,
.nr_parts = ARRAY_SIZE(gpmi_partitions),
.parts = gpmi_partitions,
.part_types = { "cmdline", NULL },
};
static struct spi_board_info spi_board_info[] __initdata = {
#if defined(CONFIG_ENC28J60) || defined(CONFIG_ENC28J60_MODULE)
{
.modalias = "enc28j60",
.max_speed_hz = 6 * 1000 * 1000,
.bus_num = 1,
.chip_select = 0,
.platform_data = NULL,
},
#endif
};
static void __init stmp378x_devb_init(void)
{
stmp3xxx_pinmux_init(NR_REAL_IRQS);
/* init stmp3xxx platform */
stmp3xxx_init();
stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control;
stmp3xxx_appuart.dev.platform_data = appuart_pins;
stmp3xxx_mmc.dev.platform_data = &mmc_data;
stmp3xxx_gpmi.dev.platform_data = &gpmi_data;
stmp3xxx_spi1.dev.platform_data = &ssp1_pins;
stmp3xxx_spi2.dev.platform_data = &ssp2_pins;
stmp378x_i2c.dev.platform_data = &i2c_pins;
/* register spi devices */
spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
/* add board's devices */
platform_add_devices(devices, ARRAY_SIZE(devices));
/* add devices selected by command line ssp1= and ssp2= options */
stmp3xxx_ssp1_device_register();
stmp3xxx_ssp2_device_register();
}
MACHINE_START(STMP378X, "STMP378X")
.boot_params = 0x40000100,
.map_io = stmp378x_map_io,
.init_irq = stmp378x_init_irq,
.timer = &stmp3xxx_timer,
.init_machine = stmp378x_devb_init,
MACHINE_END
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