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> 23 #include <linux/delay.h> 24 #include <linux/mtd/mtd.h> 25 #include <linux/mtd/partitions.h> 26 #include <linux/gpio.h> 27 #include <linux/err.h> 28 #include <linux/clk.h> 29 30 #include <asm/setup.h> 31 #include <asm/memory.h> 32 #include <asm/mach-types.h> 33 #include <mach/hardware.h> 34 #include <asm/irq.h> 35 #include <asm/sizes.h> 36 37 #include <asm/mach/arch.h> 38 #include <asm/mach/map.h> 39 #include <asm/mach/irq.h> 40 #include <asm/mach/flash.h> 41 42 #include <mach/pxa25x.h> 43 #include <mach/mmc.h> 44 #include <mach/udc.h> 45 #include <mach/gumstix.h> 46 47 #include "generic.h" 48 49 static struct resource flash_resource = { 50 .start = 0x00000000, 51 .end = SZ_64M - 1, 52 .flags = IORESOURCE_MEM, 53 }; 54 55 static struct mtd_partition gumstix_partitions[] = { 56 { 57 .name = "Bootloader", 58 .size = 0x00040000, 59 .offset = 0, 60 .mask_flags = MTD_WRITEABLE /* force read-only */ 61 } , { 62 .name = "rootfs", 63 .size = MTDPART_SIZ_FULL, 64 .offset = MTDPART_OFS_APPEND 65 } 66 }; 67 68 static struct flash_platform_data gumstix_flash_data = { 69 .map_name = "cfi_probe", 70 .parts = gumstix_partitions, 71 .nr_parts = ARRAY_SIZE(gumstix_partitions), 72 .width = 2, 73 }; 74 75 static struct platform_device gumstix_flash_device = { 76 .name = "pxa2xx-flash", 77 .id = 0, 78 .dev = { 79 .platform_data = &gumstix_flash_data, 80 }, 81 .resource = &flash_resource, 82 .num_resources = 1, 83 }; 84 85 static struct platform_device *devices[] __initdata = { 86 &gumstix_flash_device, 87 }; 88 89 #ifdef CONFIG_MMC_PXA 90 static struct pxamci_platform_data gumstix_mci_platform_data = { 91 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, 92 .gpio_card_detect = -1, 93 .gpio_card_ro = -1, 94 .gpio_power = -1, 95 }; 96 97 static void __init gumstix_mmc_init(void) 98 { 99 pxa_set_mci_info(&gumstix_mci_platform_data); 100 } 101 #else 102 static void __init gumstix_mmc_init(void) 103 { 104 pr_debug("Gumstix mmc disabled\n"); 105 } 106 #endif 107 108 #ifdef CONFIG_USB_GADGET_PXA25X 109 static struct pxa2xx_udc_mach_info gumstix_udc_info __initdata = { 110 .gpio_vbus = GPIO_GUMSTIX_USB_GPIOn, 111 .gpio_pullup = GPIO_GUMSTIX_USB_GPIOx, 112 }; 113 114 static void __init gumstix_udc_init(void) 115 { 116 pxa_set_udc_info(&gumstix_udc_info); 117 } 118 #else 119 static void gumstix_udc_init(void) 120 { 121 pr_debug("Gumstix udc is disabled\n"); 122 } 123 #endif 124 125 #ifdef CONFIG_BT 126 /* Normally, the bootloader would have enabled this 32kHz clock but many 127 ** boards still have u-boot 1.1.4 so we check if it has been turned on and 128 ** if not, we turn it on with a warning message. */ 129 static void gumstix_setup_bt_clock(void) 130 { 131 int timeout = 500; 132 133 if (!(OSCC & OSCC_OOK)) 134 pr_warning("32kHz clock was not on. Bootloader may need to " 135 "be updated\n"); 136 else 137 return; 138 139 OSCC |= OSCC_OON; 140 do { 141 if (OSCC & OSCC_OOK) 142 break; 143 udelay(1); 144 } while (--timeout); 145 if (!timeout) 146 pr_err("Failed to start 32kHz clock\n"); 147 } 148 149 static void __init gumstix_bluetooth_init(void) 150 { 151 int err; 152 153 gumstix_setup_bt_clock(); 154 155 err = gpio_request(GPIO_GUMSTIX_BTRESET, "BTRST"); 156 if (err) { 157 pr_err("gumstix: failed request gpio for bluetooth reset\n"); 158 return; 159 } 160 161 err = gpio_direction_output(GPIO_GUMSTIX_BTRESET, 1); 162 if (err) { 163 pr_err("gumstix: can't reset bluetooth\n"); 164 return; 165 } 166 gpio_set_value(GPIO_GUMSTIX_BTRESET, 0); 167 udelay(100); 168 gpio_set_value(GPIO_GUMSTIX_BTRESET, 1); 169 } 170 #else 171 static void gumstix_bluetooth_init(void) 172 { 173 pr_debug("Gumstix Bluetooth is disabled\n"); 174 } 175 #endif 176 177 static unsigned long gumstix_pin_config[] __initdata = { 178 GPIO12_32KHz, 179 /* BTUART */ 180 GPIO42_HWUART_RXD, 181 GPIO43_HWUART_TXD, 182 GPIO44_HWUART_CTS, 183 GPIO45_HWUART_RTS, 184 /* MMC */ 185 GPIO6_MMC_CLK, 186 GPIO53_MMC_CLK, 187 GPIO8_MMC_CS0, 188 }; 189 190 int __attribute__((weak)) am200_init(void) 191 { 192 return 0; 193 } 194 195 int __attribute__((weak)) am300_init(void) 196 { 197 return 0; 198 } 199 200 static void __init carrier_board_init(void) 201 { 202 /* 203 * put carrier/expansion board init here if 204 * they cannot be detected programatically 205 */ 206 am200_init(); 207 am300_init(); 208 } 209 210 static void __init gumstix_init(void) 211 { 212 pxa2xx_mfp_config(ARRAY_AND_SIZE(gumstix_pin_config)); 213 214 gumstix_bluetooth_init(); 215 gumstix_udc_init(); 216 gumstix_mmc_init(); 217 (void) platform_add_devices(devices, ARRAY_SIZE(devices)); 218 carrier_board_init(); 219 } 220 221 MACHINE_START(GUMSTIX, "Gumstix") 222 .phys_io = 0x40000000, 223 .boot_params = 0xa0000100, /* match u-boot bi_boot_params */ 224 .io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc, 225 .map_io = pxa_map_io, 226 .init_irq = pxa25x_init_irq, 227 .timer = &pxa_timer, 228 .init_machine = gumstix_init, 229 MACHINE_END 230