diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/mach-pxa/gumstix.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/gumstix.c b/arch/arm/mach-pxa/gumstix.c new file mode 100644 index 000000000..49dd618b1 --- /dev/null +++ b/arch/arm/mach-pxa/gumstix.c @@ -0,0 +1,241 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/arch/arm/mach-pxa/gumstix.c + * + * Support for the Gumstix motherboards. + * + * Original Author: Craig Hughes + * Created: Feb 14, 2008 + * Copyright: Craig Hughes + * + * Implemented based on lubbock.c by Nicolas Pitre and code from Craig + * Hughes + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/gpio/machine.h> +#include <linux/gpio.h> +#include <linux/err.h> +#include <linux/clk.h> + +#include <asm/setup.h> +#include <asm/memory.h> +#include <asm/mach-types.h> +#include <mach/hardware.h> +#include <asm/irq.h> +#include <linux/sizes.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/irq.h> +#include <asm/mach/flash.h> + +#include "pxa25x.h" +#include <linux/platform_data/mmc-pxamci.h> +#include "udc.h" +#include "gumstix.h" + +#include "generic.h" + +static struct resource flash_resource = { + .start = 0x00000000, + .end = SZ_64M - 1, + .flags = IORESOURCE_MEM, +}; + +static struct mtd_partition gumstix_partitions[] = { + { + .name = "Bootloader", + .size = 0x00040000, + .offset = 0, + .mask_flags = MTD_WRITEABLE /* force read-only */ + } , { + .name = "rootfs", + .size = MTDPART_SIZ_FULL, + .offset = MTDPART_OFS_APPEND + } +}; + +static struct flash_platform_data gumstix_flash_data = { + .map_name = "cfi_probe", + .parts = gumstix_partitions, + .nr_parts = ARRAY_SIZE(gumstix_partitions), + .width = 2, +}; + +static struct platform_device gumstix_flash_device = { + .name = "pxa2xx-flash", + .id = 0, + .dev = { + .platform_data = &gumstix_flash_data, + }, + .resource = &flash_resource, + .num_resources = 1, +}; + +static struct platform_device *devices[] __initdata = { + &gumstix_flash_device, +}; + +#ifdef CONFIG_MMC_PXA +static struct pxamci_platform_data gumstix_mci_platform_data = { + .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, +}; + +static void __init gumstix_mmc_init(void) +{ + pxa_set_mci_info(&gumstix_mci_platform_data); +} +#else +static void __init gumstix_mmc_init(void) +{ + pr_debug("Gumstix mmc disabled\n"); +} +#endif + +#ifdef CONFIG_USB_PXA25X +static struct gpiod_lookup_table gumstix_gpio_vbus_gpiod_table = { + .dev_id = "gpio-vbus", + .table = { + GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOn, + "vbus", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("gpio-pxa", GPIO_GUMSTIX_USB_GPIOx, + "pullup", GPIO_ACTIVE_HIGH), + { }, + }, +}; + +static struct platform_device gumstix_gpio_vbus = { + .name = "gpio-vbus", + .id = -1, +}; + +static void __init gumstix_udc_init(void) +{ + gpiod_add_lookup_table(&gumstix_gpio_vbus_gpiod_table); + platform_device_register(&gumstix_gpio_vbus); +} +#else +static void gumstix_udc_init(void) +{ + pr_debug("Gumstix udc is disabled\n"); +} +#endif + +#ifdef CONFIG_BT +/* Normally, the bootloader would have enabled this 32kHz clock but many +** boards still have u-boot 1.1.4 so we check if it has been turned on and +** if not, we turn it on with a warning message. */ +static void gumstix_setup_bt_clock(void) +{ + int timeout = 500; + + if (!(readl(OSCC) & OSCC_OOK)) + pr_warn("32kHz clock was not on. Bootloader may need to be updated\n"); + else + return; + + writel(readl(OSCC) | OSCC_OON, OSCC); + do { + if (readl(OSCC) & OSCC_OOK) + break; + udelay(1); + } while (--timeout); + if (!timeout) + pr_err("Failed to start 32kHz clock\n"); +} + +static void __init gumstix_bluetooth_init(void) +{ + int err; + + gumstix_setup_bt_clock(); + + err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST"); + if (err) { + pr_err("gumstix: failed request gpio for bluetooth reset\n"); + return; + } + + err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1); + if (err) { + pr_err("gumstix: can't reset bluetooth\n"); + return; + } + gpio_set_value(GPIO_GUMSTIX_BTRESET, 0); + udelay(100); + gpio_set_value(GPIO_GUMSTIX_BTRESET, 1); +} +#else +static void gumstix_bluetooth_init(void) +{ + pr_debug("Gumstix Bluetooth is disabled\n"); +} +#endif + +static unsigned long gumstix_pin_config[] __initdata = { + GPIO12_32KHz, + /* BTUART */ + GPIO42_HWUART_RXD, + GPIO43_HWUART_TXD, + GPIO44_HWUART_CTS, + GPIO45_HWUART_RTS, + /* MMC */ + GPIO6_MMC_CLK, + GPIO53_MMC_CLK, + GPIO8_MMC_CS0, +}; + +int __attribute__((weak)) am200_init(void) +{ + return 0; +} + +int __attribute__((weak)) am300_init(void) +{ + return 0; +} + +static void __init carrier_board_init(void) +{ + /* + * put carrier/expansion board init here if + * they cannot be detected programatically + */ + am200_init(); + am300_init(); +} + +static void __init gumstix_init(void) +{ + pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config)); + + pxa_set_ffuart_info(NULL); + pxa_set_btuart_info(NULL); + pxa_set_stuart_info(NULL); + pxa_set_hwuart_info(NULL); + + gumstix_bluetooth_init(); + gumstix_udc_init(); + gumstix_mmc_init(); + (void) platform_add_devices(devices, ARRAY_SIZE(devices)); + carrier_board_init(); +} + +MACHINE_START(GUMSTIX, "Gumstix") + .atag_offset = 0x100, /* match u-boot bi_boot_params */ + .map_io = pxa25x_map_io, + .nr_irqs = PXA_NR_IRQS, + .init_irq = pxa25x_init_irq, + .handle_irq = pxa25x_handle_irq, + .init_time = pxa_timer_init, + .init_machine = gumstix_init, + .restart = pxa_restart, +MACHINE_END |