335 lines
8.6 KiB
C
335 lines
8.6 KiB
C
/*
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* Freescale STMP378X development board support
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*
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* Embedded Alley Solutions, Inc <source@embeddedalley.com>
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*
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* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
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*/
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/*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/spi/spi.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <mach/pins.h>
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#include <mach/pinmux.h>
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#include <mach/platform.h>
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#include <mach/stmp3xxx.h>
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#include <mach/mmc.h>
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#include <mach/gpmi.h>
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#include "stmp378x.h"
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static struct platform_device *devices[] = {
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&stmp3xxx_dbguart,
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&stmp3xxx_appuart,
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&stmp3xxx_watchdog,
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&stmp3xxx_touchscreen,
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&stmp3xxx_rtc,
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&stmp3xxx_keyboard,
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&stmp3xxx_framebuffer,
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&stmp3xxx_backlight,
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&stmp3xxx_rotdec,
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&stmp3xxx_persistent,
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&stmp3xxx_dcp_bootstream,
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&stmp3xxx_dcp,
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&stmp3xxx_battery,
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&stmp378x_pxp,
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&stmp378x_i2c,
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};
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static struct pin_desc i2c_pins_desc[] = {
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{ PINID_I2C_SCL, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_I2C_SDA, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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};
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static struct pin_group i2c_pins = {
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.pins = i2c_pins_desc,
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.nr_pins = ARRAY_SIZE(i2c_pins_desc),
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};
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static struct pin_desc dbguart_pins_0[] = {
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{ PINID_PWM0, PIN_FUN3, },
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{ PINID_PWM1, PIN_FUN3, },
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};
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static struct pin_group dbguart_pins[] = {
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[0] = {
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.pins = dbguart_pins_0,
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.nr_pins = ARRAY_SIZE(dbguart_pins_0),
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},
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};
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static int dbguart_pins_control(int id, int request)
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{
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int r = 0;
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if (request)
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r = stmp3xxx_request_pin_group(&dbguart_pins[id], "debug uart");
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else
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stmp3xxx_release_pin_group(&dbguart_pins[id], "debug uart");
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return r;
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}
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static struct pin_desc appuart_pins_0[] = {
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{ PINID_AUART1_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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{ PINID_AUART1_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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{ PINID_AUART1_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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{ PINID_AUART1_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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};
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static struct pin_desc appuart_pins_1[] = {
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#if 0 /* enable these when second appuart will be connected */
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{ PINID_AUART2_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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{ PINID_AUART2_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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{ PINID_AUART2_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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{ PINID_AUART2_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
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#endif
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};
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static struct pin_desc mmc_pins_desc[] = {
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{ PINID_SSP1_DATA0, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
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{ PINID_SSP1_DATA1, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
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{ PINID_SSP1_DATA2, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
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{ PINID_SSP1_DATA3, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
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{ PINID_SSP1_CMD, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
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{ PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
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{ PINID_SSP1_DETECT, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
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};
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static struct pin_group mmc_pins = {
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.pins = mmc_pins_desc,
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.nr_pins = ARRAY_SIZE(mmc_pins_desc),
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};
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static int stmp3xxxmmc_get_wp(void)
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{
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return gpio_get_value(PINID_PWM4);
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}
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static int stmp3xxxmmc_hw_init_ssp1(void)
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{
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int ret;
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ret = stmp3xxx_request_pin_group(&mmc_pins, "mmc");
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if (ret)
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goto out;
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/* Configure write protect GPIO pin */
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ret = gpio_request(PINID_PWM4, "mmc wp");
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if (ret)
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goto out_wp;
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gpio_direction_input(PINID_PWM4);
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/* Configure POWER pin as gpio to drive power to MMC slot */
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ret = gpio_request(PINID_PWM3, "mmc power");
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if (ret)
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goto out_power;
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gpio_direction_output(PINID_PWM3, 0);
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mdelay(100);
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return 0;
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out_power:
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gpio_free(PINID_PWM4);
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out_wp:
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stmp3xxx_release_pin_group(&mmc_pins, "mmc");
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out:
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return ret;
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}
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static void stmp3xxxmmc_hw_release_ssp1(void)
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{
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gpio_free(PINID_PWM3);
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gpio_free(PINID_PWM4);
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stmp3xxx_release_pin_group(&mmc_pins, "mmc");
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}
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static void stmp3xxxmmc_cmd_pullup_ssp1(int enable)
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{
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stmp3xxx_pin_pullup(PINID_SSP1_CMD, enable, "mmc");
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}
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static unsigned long
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stmp3xxxmmc_setclock_ssp1(void __iomem *base, unsigned long hz)
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{
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struct clk *ssp, *parent;
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char *p;
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long r;
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ssp = clk_get(NULL, "ssp");
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/* using SSP1, no timeout, clock rate 1 */
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writel(BF(2, SSP_TIMING_CLOCK_DIVIDE) |
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BF(0xFFFF, SSP_TIMING_TIMEOUT),
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base + HW_SSP_TIMING);
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p = (hz > 1000000) ? "io" : "osc_24M";
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parent = clk_get(NULL, p);
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clk_set_parent(ssp, parent);
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r = clk_set_rate(ssp, 2 * hz / 1000);
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clk_put(parent);
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clk_put(ssp);
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return hz;
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}
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static struct stmp3xxxmmc_platform_data mmc_data = {
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.hw_init = stmp3xxxmmc_hw_init_ssp1,
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.hw_release = stmp3xxxmmc_hw_release_ssp1,
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.get_wp = stmp3xxxmmc_get_wp,
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.cmd_pullup = stmp3xxxmmc_cmd_pullup_ssp1,
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.setclock = stmp3xxxmmc_setclock_ssp1,
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};
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static struct pin_group appuart_pins[] = {
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[0] = {
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.pins = appuart_pins_0,
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.nr_pins = ARRAY_SIZE(appuart_pins_0),
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},
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[1] = {
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.pins = appuart_pins_1,
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.nr_pins = ARRAY_SIZE(appuart_pins_1),
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},
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};
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static struct pin_desc ssp1_pins_desc[] = {
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{ PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0, },
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{ PINID_SSP1_CMD, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
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{ PINID_SSP1_DATA0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
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{ PINID_SSP1_DATA3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
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};
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static struct pin_desc ssp2_pins_desc[] = {
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{ PINID_GPMI_WRN, PIN_FUN3, PIN_8MA, PIN_3_3V, 0, },
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{ PINID_GPMI_RDY1, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
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{ PINID_GPMI_D00, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
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{ PINID_GPMI_D03, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
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};
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static struct pin_group ssp1_pins = {
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.pins = ssp1_pins_desc,
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.nr_pins = ARRAY_SIZE(ssp1_pins_desc),
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};
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static struct pin_group ssp2_pins = {
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.pins = ssp1_pins_desc,
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.nr_pins = ARRAY_SIZE(ssp2_pins_desc),
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};
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static struct pin_desc gpmi_pins_desc[] = {
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{ PINID_GPMI_CE0N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_CE1N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GMPI_CE2N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_CLE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_ALE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_WPN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
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{ PINID_GPMI_RDY1, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D00, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D01, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D02, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D03, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D04, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D05, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D06, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_D07, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_RDY0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_RDY2, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_RDY3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
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{ PINID_GPMI_WRN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
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{ PINID_GPMI_RDN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
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};
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static struct pin_group gpmi_pins = {
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.pins = gpmi_pins_desc,
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.nr_pins = ARRAY_SIZE(gpmi_pins_desc),
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};
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static struct mtd_partition gpmi_partitions[] = {
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[0] = {
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.name = "boot",
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.size = 10 * SZ_1M,
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.offset = 0,
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},
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[1] = {
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.name = "data",
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.size = MTDPART_SIZ_FULL,
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.offset = MTDPART_OFS_APPEND,
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},
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};
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static struct gpmi_platform_data gpmi_data = {
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.pins = &gpmi_pins,
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.nr_parts = ARRAY_SIZE(gpmi_partitions),
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.parts = gpmi_partitions,
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.part_types = { "cmdline", NULL },
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};
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static struct spi_board_info spi_board_info[] __initdata = {
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#if defined(CONFIG_ENC28J60) || defined(CONFIG_ENC28J60_MODULE)
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{
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.modalias = "enc28j60",
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.max_speed_hz = 6 * 1000 * 1000,
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.bus_num = 1,
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.chip_select = 0,
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.platform_data = NULL,
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},
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#endif
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};
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static void __init stmp378x_devb_init(void)
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{
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stmp3xxx_pinmux_init(NR_REAL_IRQS);
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/* init stmp3xxx platform */
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stmp3xxx_init();
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stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control;
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stmp3xxx_appuart.dev.platform_data = appuart_pins;
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stmp3xxx_mmc.dev.platform_data = &mmc_data;
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stmp3xxx_gpmi.dev.platform_data = &gpmi_data;
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stmp3xxx_spi1.dev.platform_data = &ssp1_pins;
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stmp3xxx_spi2.dev.platform_data = &ssp2_pins;
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stmp378x_i2c.dev.platform_data = &i2c_pins;
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/* register spi devices */
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spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
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/* add board's devices */
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platform_add_devices(devices, ARRAY_SIZE(devices));
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/* add devices selected by command line ssp1= and ssp2= options */
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stmp3xxx_ssp1_device_register();
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stmp3xxx_ssp2_device_register();
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}
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MACHINE_START(STMP378X, "STMP378X")
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.phys_io = 0x80000000,
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.io_pg_offst = ((0xf0000000) >> 18) & 0xfffc,
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.boot_params = 0x40000100,
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.map_io = stmp378x_map_io,
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.init_irq = stmp378x_init_irq,
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.timer = &stmp3xxx_timer,
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.init_machine = stmp378x_devb_init,
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MACHINE_END
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