Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-pxa/gumstix.c |
| 3 | * |
| 4 | * Support for the Gumstix motherboards. |
| 5 | * |
| 6 | * Original Author: Craig Hughes |
| 7 | * Created: Feb 14, 2008 |
| 8 | * Copyright: Craig Hughes |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * Implemented based on lubbock.c by Nicolas Pitre and code from Craig |
| 15 | * Hughes |
| 16 | */ |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/interrupt.h> |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 23 | #include <linux/delay.h> |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 24 | #include <linux/mtd/mtd.h> |
| 25 | #include <linux/mtd/partitions.h> |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 26 | #include <linux/gpio.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/clk.h> |
Dmitry Eremin-Solenikov | d19f4cb | 2011-02-14 15:33:17 +0300 | [diff] [blame] | 29 | #include <linux/usb/gpio_vbus.h> |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 30 | |
| 31 | #include <asm/setup.h> |
| 32 | #include <asm/memory.h> |
| 33 | #include <asm/mach-types.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 34 | #include <mach/hardware.h> |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 35 | #include <asm/irq.h> |
| 36 | #include <asm/sizes.h> |
| 37 | |
| 38 | #include <asm/mach/arch.h> |
| 39 | #include <asm/mach/map.h> |
| 40 | #include <asm/mach/irq.h> |
| 41 | #include <asm/mach/flash.h> |
Eric Miao | 51c6298 | 2009-01-02 23:17:22 +0800 | [diff] [blame] | 42 | |
| 43 | #include <mach/pxa25x.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 44 | #include <mach/mmc.h> |
| 45 | #include <mach/udc.h> |
| 46 | #include <mach/gumstix.h> |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 47 | |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 48 | #include "generic.h" |
| 49 | |
| 50 | static struct resource flash_resource = { |
| 51 | .start = 0x00000000, |
| 52 | .end = SZ_64M - 1, |
| 53 | .flags = IORESOURCE_MEM, |
| 54 | }; |
| 55 | |
| 56 | static struct mtd_partition gumstix_partitions[] = { |
| 57 | { |
| 58 | .name = "Bootloader", |
| 59 | .size = 0x00040000, |
| 60 | .offset = 0, |
| 61 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 62 | } , { |
| 63 | .name = "rootfs", |
| 64 | .size = MTDPART_SIZ_FULL, |
| 65 | .offset = MTDPART_OFS_APPEND |
| 66 | } |
| 67 | }; |
| 68 | |
| 69 | static struct flash_platform_data gumstix_flash_data = { |
| 70 | .map_name = "cfi_probe", |
| 71 | .parts = gumstix_partitions, |
| 72 | .nr_parts = ARRAY_SIZE(gumstix_partitions), |
| 73 | .width = 2, |
| 74 | }; |
| 75 | |
| 76 | static struct platform_device gumstix_flash_device = { |
| 77 | .name = "pxa2xx-flash", |
| 78 | .id = 0, |
| 79 | .dev = { |
| 80 | .platform_data = &gumstix_flash_data, |
| 81 | }, |
| 82 | .resource = &flash_resource, |
| 83 | .num_resources = 1, |
| 84 | }; |
| 85 | |
| 86 | static struct platform_device *devices[] __initdata = { |
| 87 | &gumstix_flash_device, |
| 88 | }; |
| 89 | |
| 90 | #ifdef CONFIG_MMC_PXA |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 91 | static struct pxamci_platform_data gumstix_mci_platform_data = { |
Robert Jarzmik | 7a64825 | 2009-07-06 22:16:42 +0200 | [diff] [blame] | 92 | .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, |
| 93 | .gpio_card_detect = -1, |
| 94 | .gpio_card_ro = -1, |
| 95 | .gpio_power = -1, |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 96 | }; |
| 97 | |
| 98 | static void __init gumstix_mmc_init(void) |
| 99 | { |
| 100 | pxa_set_mci_info(&gumstix_mci_platform_data); |
| 101 | } |
| 102 | #else |
| 103 | static void __init gumstix_mmc_init(void) |
| 104 | { |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 105 | pr_debug("Gumstix mmc disabled\n"); |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 106 | } |
| 107 | #endif |
| 108 | |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 109 | #ifdef CONFIG_USB_GADGET_PXA25X |
Dmitry Eremin-Solenikov | d19f4cb | 2011-02-14 15:33:17 +0300 | [diff] [blame] | 110 | static struct gpio_vbus_mach_info gumstix_udc_info = { |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 111 | .gpio_vbus = GPIO_GUMSTIX_USB_GPIOn, |
| 112 | .gpio_pullup = GPIO_GUMSTIX_USB_GPIOx, |
| 113 | }; |
| 114 | |
Dmitry Eremin-Solenikov | d19f4cb | 2011-02-14 15:33:17 +0300 | [diff] [blame] | 115 | static struct platform_device gumstix_gpio_vbus = { |
| 116 | .name = "gpio-vbus", |
| 117 | .id = -1, |
| 118 | .dev = { |
| 119 | .platform_data = &gumstix_udc_info, |
| 120 | }, |
| 121 | }; |
| 122 | |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 123 | static void __init gumstix_udc_init(void) |
| 124 | { |
Dmitry Eremin-Solenikov | d19f4cb | 2011-02-14 15:33:17 +0300 | [diff] [blame] | 125 | platform_device_register(&gumstix_gpio_vbus); |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 126 | } |
| 127 | #else |
| 128 | static void gumstix_udc_init(void) |
| 129 | { |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 130 | pr_debug("Gumstix udc is disabled\n"); |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 131 | } |
| 132 | #endif |
| 133 | |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 134 | #ifdef CONFIG_BT |
| 135 | /* Normally, the bootloader would have enabled this 32kHz clock but many |
| 136 | ** boards still have u-boot 1.1.4 so we check if it has been turned on and |
| 137 | ** if not, we turn it on with a warning message. */ |
| 138 | static void gumstix_setup_bt_clock(void) |
| 139 | { |
| 140 | int timeout = 500; |
| 141 | |
| 142 | if (!(OSCC & OSCC_OOK)) |
| 143 | pr_warning("32kHz clock was not on. Bootloader may need to " |
| 144 | "be updated\n"); |
| 145 | else |
| 146 | return; |
| 147 | |
| 148 | OSCC |= OSCC_OON; |
| 149 | do { |
| 150 | if (OSCC & OSCC_OOK) |
| 151 | break; |
| 152 | udelay(1); |
| 153 | } while (--timeout); |
| 154 | if (!timeout) |
| 155 | pr_err("Failed to start 32kHz clock\n"); |
| 156 | } |
| 157 | |
| 158 | static void __init gumstix_bluetooth_init(void) |
| 159 | { |
| 160 | int err; |
| 161 | |
| 162 | gumstix_setup_bt_clock(); |
| 163 | |
| 164 | err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST"); |
| 165 | if (err) { |
| 166 | pr_err("gumstix: failed request gpio for bluetooth reset\n"); |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1); |
| 171 | if (err) { |
| 172 | pr_err("gumstix: can't reset bluetooth\n"); |
| 173 | return; |
| 174 | } |
| 175 | gpio_set_value(GPIO_GUMSTIX_BTRESET, 0); |
| 176 | udelay(100); |
| 177 | gpio_set_value(GPIO_GUMSTIX_BTRESET, 1); |
| 178 | } |
| 179 | #else |
| 180 | static void gumstix_bluetooth_init(void) |
| 181 | { |
| 182 | pr_debug("Gumstix Bluetooth is disabled\n"); |
| 183 | } |
| 184 | #endif |
| 185 | |
| 186 | static unsigned long gumstix_pin_config[] __initdata = { |
| 187 | GPIO12_32KHz, |
| 188 | /* BTUART */ |
| 189 | GPIO42_HWUART_RXD, |
| 190 | GPIO43_HWUART_TXD, |
| 191 | GPIO44_HWUART_CTS, |
| 192 | GPIO45_HWUART_RTS, |
| 193 | /* MMC */ |
| 194 | GPIO6_MMC_CLK, |
| 195 | GPIO53_MMC_CLK, |
| 196 | GPIO8_MMC_CS0, |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 197 | }; |
| 198 | |
Jaya Kumar | 3332b0c | 2008-12-09 22:14:29 +0800 | [diff] [blame] | 199 | int __attribute__((weak)) am200_init(void) |
| 200 | { |
| 201 | return 0; |
| 202 | } |
| 203 | |
Jaya Kumar | 4ce255c | 2009-01-01 17:51:01 +0100 | [diff] [blame] | 204 | int __attribute__((weak)) am300_init(void) |
| 205 | { |
| 206 | return 0; |
| 207 | } |
| 208 | |
Jaya Kumar | 3332b0c | 2008-12-09 22:14:29 +0800 | [diff] [blame] | 209 | static void __init carrier_board_init(void) |
| 210 | { |
| 211 | /* |
| 212 | * put carrier/expansion board init here if |
| 213 | * they cannot be detected programatically |
| 214 | */ |
| 215 | am200_init(); |
Jaya Kumar | 4ce255c | 2009-01-01 17:51:01 +0100 | [diff] [blame] | 216 | am300_init(); |
Jaya Kumar | 3332b0c | 2008-12-09 22:14:29 +0800 | [diff] [blame] | 217 | } |
| 218 | |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 219 | static void __init gumstix_init(void) |
| 220 | { |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 221 | pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config)); |
| 222 | |
Russell King | cc155c6 | 2009-11-09 13:34:08 +0800 | [diff] [blame] | 223 | pxa_set_ffuart_info(NULL); |
| 224 | pxa_set_btuart_info(NULL); |
| 225 | pxa_set_stuart_info(NULL); |
| 226 | pxa_set_hwuart_info(NULL); |
| 227 | |
Jaya Kumar | d8ad785 | 2008-08-16 04:07:18 +0100 | [diff] [blame] | 228 | gumstix_bluetooth_init(); |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 229 | gumstix_udc_init(); |
| 230 | gumstix_mmc_init(); |
| 231 | (void) platform_add_devices(devices, ARRAY_SIZE(devices)); |
Jaya Kumar | 3332b0c | 2008-12-09 22:14:29 +0800 | [diff] [blame] | 232 | carrier_board_init(); |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | MACHINE_START(GUMSTIX, "Gumstix") |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 236 | .boot_params = 0xa0000100, /* match u-boot bi_boot_params */ |
Marek Vasut | 851982c | 2010-10-11 02:20:19 +0200 | [diff] [blame] | 237 | .map_io = pxa25x_map_io, |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 238 | .init_irq = pxa25x_init_irq, |
Eric Miao | 8a97ae2 | 2011-05-18 21:30:04 +0800 | [diff] [blame] | 239 | .handle_irq = pxa25x_handle_irq, |
Jaya Kumar | 90b8fc3 | 2008-03-15 05:11:07 +0100 | [diff] [blame] | 240 | .timer = &pxa_timer, |
| 241 | .init_machine = gumstix_init, |
| 242 | MACHINE_END |