![Eric Miao](/assets/img/avatar_default.png)
Considering the header mess ATM, it is not always possible to include the correct header files within board code. Let's keep this simple: <mach/pxa25x.h> - for pxa25x based platforms <mach/pxa27x.h> - for pxa27x based platforms <mach/pxa300.h> - for pxa300 based platforms <mach/pxa320.h> - for pxa320 based platforms <mach/pxa930.h> - for pxa930 based platforms NOTE: 1. one header one board file, they are not compatible (i.e. they have conflicting definitions which won't compile if included together). 2. Unless strictly necessary, the following header files are considered to be SoC files use _only_, and is not recommended to be included in board code: <mach/hardware.h> <mach/pxa-regs.h> <mach/pxa2xx-regs.h> <mach/pxa3xx-regs.h> <mach/mfp.h> <mach/mfp-pxa2xx.h> <mach/mfp-pxa25x.h> <mach/mfp-pxa27x.h> <mach/mfp-pxa3xx.h> <mach/mfp-pxa300.h> <mach/mfp-pxa320.h> <mach/mfp-pxa930.h> Signed-off-by: Eric Miao <eric.miao@marvell.com>
227 lines
4.7 KiB
C
227 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/pxa25x.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 "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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int __attribute__((weak)) am300_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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am300_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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