diff options
Diffstat (limited to 'arch/arm/mach-stmp378x/stmp378x_devb.c')
| -rw-r--r-- | arch/arm/mach-stmp378x/stmp378x_devb.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/arch/arm/mach-stmp378x/stmp378x_devb.c b/arch/arm/mach-stmp378x/stmp378x_devb.c new file mode 100644 index 00000000000..90d8fe6f10f --- /dev/null +++ b/arch/arm/mach-stmp378x/stmp378x_devb.c @@ -0,0 +1,334 @@ +/* + * 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") + .phys_io = 0x80000000, + .io_pg_offst = ((0xf0000000) >> 18) & 0xfffc, + .boot_params = 0x40000100, + .map_io = stmp378x_map_io, + .init_irq = stmp378x_init_irq, + .timer = &stmp3xxx_timer, + .init_machine = stmp378x_devb_init, +MACHINE_END |