223 lines
4.7 KiB
C
223 lines
4.7 KiB
C
/*
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* linux/arch/arm/mach-pxa/gumstix.c
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*
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* Support for the Gumstix motherboards.
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*
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* Original Author: Craig Hughes
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* Created: Feb 14, 2008
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* Copyright: Craig Hughes
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Implemented based on lubbock.c by Nicolas Pitre and code from Craig
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* Hughes
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/gpio.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <asm/setup.h>
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#include <asm/memory.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/sizes.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/mach/flash.h>
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#include <mach/mmc.h>
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#include <mach/udc.h>
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#include <mach/gumstix.h>
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#include <mach/pxa-regs.h>
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#include <mach/pxa2xx-regs.h>
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#include <mach/mfp-pxa25x.h>
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#include "generic.h"
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static struct resource flash_resource = {
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.start = 0x00000000,
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.end = SZ_64M - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct mtd_partition gumstix_partitions[] = {
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{
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.name = "Bootloader",
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.size = 0x00040000,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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} , {
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.name = "rootfs",
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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 flash_platform_data gumstix_flash_data = {
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.map_name = "cfi_probe",
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.parts = gumstix_partitions,
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.nr_parts = ARRAY_SIZE(gumstix_partitions),
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.width = 2,
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};
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static struct platform_device gumstix_flash_device = {
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.name = "pxa2xx-flash",
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.id = 0,
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.dev = {
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.platform_data = &gumstix_flash_data,
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},
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.resource = &flash_resource,
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.num_resources = 1,
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};
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static struct platform_device *devices[] __initdata = {
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&gumstix_flash_device,
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};
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#ifdef CONFIG_MMC_PXA
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static struct pxamci_platform_data gumstix_mci_platform_data = {
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.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
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};
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static void __init gumstix_mmc_init(void)
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{
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pxa_set_mci_info(&gumstix_mci_platform_data);
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}
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#else
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static void __init gumstix_mmc_init(void)
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{
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pr_debug("Gumstix mmc disabled\n");
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}
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#endif
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#ifdef CONFIG_USB_GADGET_PXA25X
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static struct pxa2xx_udc_mach_info gumstix_udc_info __initdata = {
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.gpio_vbus = GPIO_GUMSTIX_USB_GPIOn,
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.gpio_pullup = GPIO_GUMSTIX_USB_GPIOx,
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};
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static void __init gumstix_udc_init(void)
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{
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pxa_set_udc_info(&gumstix_udc_info);
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}
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#else
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static void gumstix_udc_init(void)
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{
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pr_debug("Gumstix udc is disabled\n");
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}
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#endif
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#ifdef CONFIG_BT
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/* Normally, the bootloader would have enabled this 32kHz clock but many
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** boards still have u-boot 1.1.4 so we check if it has been turned on and
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** if not, we turn it on with a warning message. */
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static void gumstix_setup_bt_clock(void)
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{
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int timeout = 500;
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if (!(OSCC & OSCC_OOK))
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pr_warning("32kHz clock was not on. Bootloader may need to "
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"be updated\n");
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else
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return;
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OSCC |= OSCC_OON;
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do {
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if (OSCC & OSCC_OOK)
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break;
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udelay(1);
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} while (--timeout);
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if (!timeout)
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pr_err("Failed to start 32kHz clock\n");
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}
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static void __init gumstix_bluetooth_init(void)
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{
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int err;
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gumstix_setup_bt_clock();
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err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST");
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if (err) {
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pr_err("gumstix: failed request gpio for bluetooth reset\n");
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return;
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}
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err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1);
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if (err) {
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pr_err("gumstix: can't reset bluetooth\n");
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return;
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}
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gpio_set_value(GPIO_GUMSTIX_BTRESET, 0);
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udelay(100);
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gpio_set_value(GPIO_GUMSTIX_BTRESET, 1);
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}
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#else
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static void gumstix_bluetooth_init(void)
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{
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pr_debug("Gumstix Bluetooth is disabled\n");
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}
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#endif
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static unsigned long gumstix_pin_config[] __initdata = {
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GPIO12_32KHz,
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/* BTUART */
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GPIO42_HWUART_RXD,
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GPIO43_HWUART_TXD,
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GPIO44_HWUART_CTS,
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GPIO45_HWUART_RTS,
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/* MMC */
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GPIO6_MMC_CLK,
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GPIO53_MMC_CLK,
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GPIO8_MMC_CS0,
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};
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int __attribute__((weak)) am200_init(void)
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{
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return 0;
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}
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static void __init carrier_board_init(void)
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{
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/*
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* put carrier/expansion board init here if
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* they cannot be detected programatically
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*/
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am200_init();
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}
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static void __init gumstix_init(void)
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{
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pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config));
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gumstix_bluetooth_init();
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gumstix_udc_init();
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gumstix_mmc_init();
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(void) platform_add_devices(devices, ARRAY_SIZE(devices));
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carrier_board_init();
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}
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MACHINE_START(GUMSTIX, "Gumstix")
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.phys_io = 0x40000000,
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.boot_params = 0xa0000100, /* match u-boot bi_boot_params */
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.io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc,
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.map_io = pxa_map_io,
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.init_irq = pxa25x_init_irq,
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.timer = &pxa_timer,
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.init_machine = gumstix_init,
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MACHINE_END
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