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241 lines
5.1 KiB
241 lines
5.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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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* 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/machine.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 <linux/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 "pxa25x.h" |
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#include <linux/platform_data/mmc-pxamci.h> |
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#include "udc.h" |
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#include "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_PXA25X |
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static struct gpiod_lookup_table gumstix_gpio_vbus_gpiod_table = { |
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.dev_id = "gpio-vbus", |
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.table = { |
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GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOn, |
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"vbus", GPIO_ACTIVE_HIGH), |
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GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOx, |
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"pullup", GPIO_ACTIVE_HIGH), |
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{ }, |
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}, |
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}; |
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static struct platform_device gumstix_gpio_vbus = { |
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.name = "gpio-vbus", |
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.id = -1, |
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}; |
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static void __init gumstix_udc_init(void) |
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{ |
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gpiod_add_lookup_table(&gumstix_gpio_vbus_gpiod_table); |
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platform_device_register(&gumstix_gpio_vbus); |
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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 (!(readl(OSCC) & OSCC_OOK)) |
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pr_warn("32kHz clock was not on. Bootloader may need to be updated\n"); |
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else |
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return; |
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writel(readl(OSCC) | OSCC_OON, OSCC); |
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do { |
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if (readl(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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pxa_set_ffuart_info(NULL); |
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pxa_set_btuart_info(NULL); |
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pxa_set_stuart_info(NULL); |
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pxa_set_hwuart_info(NULL); |
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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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.atag_offset = 0x100, /* match u-boot bi_boot_params */ |
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.map_io = pxa25x_map_io, |
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.nr_irqs = PXA_NR_IRQS, |
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.init_irq = pxa25x_init_irq, |
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.handle_irq = pxa25x_handle_irq, |
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.init_time = pxa_timer_init, |
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.init_machine = gumstix_init, |
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.restart = pxa_restart, |
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MACHINE_END
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