arch/arm/mach-mx5/board-mx51_efikamx.c

   1 /*
   2  * Copyright (C) 2010 Linaro Limited
   3  *
   4  * based on code from the following
   5  * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
   6  * Copyright 2009-2010 Pegatron Corporation. All Rights Reserved.
   7  * Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved.
   8  *
   9  * The code contained herein is licensed under the GNU General Public
  10  * License. You may obtain a copy of the GNU General Public License
  11  * Version 2 or later at the following locations:
  12  *
  13  * http://www.opensource.org/licenses/gpl-license.html
  14  * http://www.gnu.org/copyleft/gpl.html
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/i2c.h>
  20 #include <linux/gpio.h>
  21 #include <linux/leds.h>
  22 #include <linux/input.h>
  23 #include <linux/delay.h>
  24 #include <linux/io.h>
  25 #include <linux/fsl_devices.h>
  26 #include <linux/spi/flash.h>
  27 #include <linux/spi/spi.h>
  28
  29 #include <mach/common.h>
  30 #include <mach/hardware.h>
  31 #include <mach/iomux-mx51.h>
  32 #include <mach/i2c.h>
  33 #include <mach/mxc_ehci.h>
  34
  35 #include <asm/irq.h>
  36 #include <asm/setup.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/mach/arch.h>
  39 #include <asm/mach/time.h>
  40
  41 #include "devices-imx51.h"
  42 #include "devices.h"
  43
  44 #define MX51_USB_PLL_DIV_24_MHZ 0x01
  45
  46 #define EFIKAMX_PCBID0          (2*32 + 16)
  47 #define EFIKAMX_PCBID1          (2*32 + 17)
  48 #define EFIKAMX_PCBID2          (2*32 + 11)
  49
  50 #define EFIKAMX_BLUE_LED        (2*32 + 13)
  51 #define EFIKAMX_GREEN_LED       (2*32 + 14)
  52 #define EFIKAMX_RED_LED         (2*32 + 15)
  53
  54 #define EFIKAMX_POWER_KEY       (1*32 + 31)
  55
  56 #define EFIKAMX_SPI_CS0         (3*32 + 24)
  57 #define EFIKAMX_SPI_CS1         (3*32 + 25)
  58
  59 /* the pci ids pin have pull up. they're driven low according to board id */
  60 #define MX51_PAD_PCBID0 IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  61 #define MX51_PAD_PCBID1 IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  62 #define MX51_PAD_PCBID2 IOMUX_PAD(0x504, 0x128, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
  63 #define MX51_PAD_PWRKEY IOMUX_PAD(0x48c, 0x0f8, 1, 0x0,   0, PAD_CTL_PUS_100K_UP | PAD_CTL_PKE)
  64
  65 static iomux_v3_cfg_t mx51efikamx_pads[] = {
  66         /* UART1 */
  67         MX51_PAD_UART1_RXD__UART1_RXD,
  68         MX51_PAD_UART1_TXD__UART1_TXD,
  69         MX51_PAD_UART1_RTS__UART1_RTS,
  70         MX51_PAD_UART1_CTS__UART1_CTS,
  71         /* board id */
  72         MX51_PAD_PCBID0,
  73         MX51_PAD_PCBID1,
  74         MX51_PAD_PCBID2,
  75
  76         /* SD 1 */
  77         MX51_PAD_SD1_CMD__SD1_CMD,
  78         MX51_PAD_SD1_CLK__SD1_CLK,
  79         MX51_PAD_SD1_DATA0__SD1_DATA0,
  80         MX51_PAD_SD1_DATA1__SD1_DATA1,
  81         MX51_PAD_SD1_DATA2__SD1_DATA2,
  82         MX51_PAD_SD1_DATA3__SD1_DATA3,
  83
  84         /* SD 2 */
  85         MX51_PAD_SD2_CMD__SD2_CMD,
  86         MX51_PAD_SD2_CLK__SD2_CLK,
  87         MX51_PAD_SD2_DATA0__SD2_DATA0,
  88         MX51_PAD_SD2_DATA1__SD2_DATA1,
  89         MX51_PAD_SD2_DATA2__SD2_DATA2,
  90         MX51_PAD_SD2_DATA3__SD2_DATA3,
  91
  92         /* SD/MMC WP/CD */
  93         MX51_PAD_GPIO_1_0__ESDHC1_CD,
  94         MX51_PAD_GPIO_1_1__ESDHC1_WP,
  95         MX51_PAD_GPIO_1_7__ESDHC2_WP,
  96         MX51_PAD_GPIO_1_8__ESDHC2_CD,
  97
  98         /* leds */
  99         MX51_PAD_CSI1_D9__GPIO_3_13,
 100         MX51_PAD_CSI1_VSYNC__GPIO_3_14,
 101         MX51_PAD_CSI1_HSYNC__GPIO_3_15,
 102
 103         /* power key */
 104         MX51_PAD_PWRKEY,
 105
 106         /* spi */
 107         MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
 108         MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
 109         MX51_PAD_CSPI1_SS0__GPIO_4_24,
 110         MX51_PAD_CSPI1_SS1__GPIO_4_25,
 111         MX51_PAD_CSPI1_RDY__ECSPI1_RDY,
 112         MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
 113 };
 114
 115 /* Serial ports */
 116 #if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
 117 static const struct imxuart_platform_data uart_pdata = {
 118         .flags = IMXUART_HAVE_RTSCTS,
 119 };
 120
 121 static inline void mxc_init_imx_uart(void)
 122 {
 123         imx51_add_imx_uart(0, &uart_pdata);
 124         imx51_add_imx_uart(1, &uart_pdata);
 125         imx51_add_imx_uart(2, &uart_pdata);
 126 }
 127 #else /* !SERIAL_IMX */
 128 static inline void mxc_init_imx_uart(void)
 129 {
 130 }
 131 #endif /* SERIAL_IMX */
 132
 133 /* This function is board specific as the bit mask for the plldiv will also
 134  * be different for other Freescale SoCs, thus a common bitmask is not
 135  * possible and cannot get place in /plat-mxc/ehci.c.
 136  */
 137 static int initialize_otg_port(struct platform_device *pdev)
 138 {
 139         u32 v;
 140         void __iomem *usb_base;
 141         void __iomem *usbother_base;
 142         usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
 143         usbother_base = (void __iomem *)(usb_base + MX5_USBOTHER_REGS_OFFSET);
 144
 145         /* Set the PHY clock to 19.2MHz */
 146         v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 147         v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
 148         v |= MX51_USB_PLL_DIV_24_MHZ;
 149         __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 150         iounmap(usb_base);
 151         return 0;
 152 }
 153
 154 static struct mxc_usbh_platform_data dr_utmi_config = {
 155         .init   = initialize_otg_port,
 156         .portsc = MXC_EHCI_UTMI_16BIT,
 157         .flags  = MXC_EHCI_INTERNAL_PHY,
 158 };
 159
 160 /*   PCBID2  PCBID1 PCBID0  STATE
 161         1       1      1    ER1:rev1.1
 162         1       1      0    ER2:rev1.2
 163         1       0      1    ER3:rev1.3
 164         1       0      0    ER4:rev1.4
 165 */
 166 static void __init mx51_efikamx_board_id(void)
 167 {
 168         int id;
 169
 170         /* things are taking time to settle */
 171         msleep(150);
 172
 173         gpio_request(EFIKAMX_PCBID0, "pcbid0");
 174         gpio_direction_input(EFIKAMX_PCBID0);
 175         gpio_request(EFIKAMX_PCBID1, "pcbid1");
 176         gpio_direction_input(EFIKAMX_PCBID1);
 177         gpio_request(EFIKAMX_PCBID2, "pcbid2");
 178         gpio_direction_input(EFIKAMX_PCBID2);
 179
 180         id = gpio_get_value(EFIKAMX_PCBID0);
 181         id |= gpio_get_value(EFIKAMX_PCBID1) << 1;
 182         id |= gpio_get_value(EFIKAMX_PCBID2) << 2;
 183
 184         switch (id) {
 185         case 7:
 186                 system_rev = 0x11;
 187                 break;
 188         case 6:
 189                 system_rev = 0x12;
 190                 break;
 191         case 5:
 192                 system_rev = 0x13;
 193                 break;
 194         case 4:
 195                 system_rev = 0x14;
 196                 break;
 197         default:
 198                 system_rev = 0x10;
 199                 break;
 200         }
 201
 202         if ((system_rev == 0x10)
 203                 || (system_rev == 0x12)
 204                 || (system_rev == 0x14)) {
 205                 printk(KERN_WARNING
 206                         "EfikaMX: Unsupported board revision 1.%u!\n",
 207                         system_rev & 0xf);
 208         }
 209 }
 210
 211 static struct gpio_led mx51_efikamx_leds[] = {
 212         {
 213                 .name = "efikamx:green",
 214                 .default_trigger = "default-on",
 215                 .gpio = EFIKAMX_GREEN_LED,
 216         },
 217         {
 218                 .name = "efikamx:red",
 219                 .default_trigger = "ide-disk",
 220                 .gpio = EFIKAMX_RED_LED,
 221         },
 222         {
 223                 .name = "efikamx:blue",
 224                 .default_trigger = "mmc0",
 225                 .gpio = EFIKAMX_BLUE_LED,
 226         },
 227 };
 228
 229 static struct gpio_led_platform_data mx51_efikamx_leds_data = {
 230         .leds = mx51_efikamx_leds,
 231         .num_leds = ARRAY_SIZE(mx51_efikamx_leds),
 232 };
 233
 234 static struct platform_device mx51_efikamx_leds_device = {
 235         .name = "leds-gpio",
 236         .id = -1,
 237         .dev = {
 238                 .platform_data = &mx51_efikamx_leds_data,
 239         },
 240 };
 241
 242 static struct gpio_keys_button mx51_efikamx_powerkey[] = {
 243         {
 244                 .code = KEY_POWER,
 245                 .gpio = EFIKAMX_POWER_KEY,
 246                 .type = EV_PWR,
 247                 .desc = "Power Button (CM)",
 248                 .wakeup = 1,
 249                 .debounce_interval = 10, /* ms */
 250         },
 251 };
 252
 253 static const struct gpio_keys_platform_data mx51_efikamx_powerkey_data __initconst = {
 254         .buttons = mx51_efikamx_powerkey,
 255         .nbuttons = ARRAY_SIZE(mx51_efikamx_powerkey),
 256 };
 257
 258 static struct mtd_partition mx51_efikamx_spi_nor_partitions[] = {
 259         {
 260          .name = "u-boot",
 261          .offset = 0,
 262          .size = SZ_256K,
 263         },
 264         {
 265           .name = "config",
 266           .offset = MTDPART_OFS_APPEND,
 267           .size = SZ_64K,
 268         },
 269 };
 270
 271 static struct flash_platform_data mx51_efikamx_spi_flash_data = {
 272         .name           = "spi_flash",
 273         .parts          = mx51_efikamx_spi_nor_partitions,
 274         .nr_parts       = ARRAY_SIZE(mx51_efikamx_spi_nor_partitions),
 275         .type           = "sst25vf032b",
 276 };
 277
 278 static struct spi_board_info mx51_efikamx_spi_board_info[] __initdata = {
 279         {
 280                 .modalias = "m25p80",
 281                 .max_speed_hz = 25000000,
 282                 .bus_num = 0,
 283                 .chip_select = 1,
 284                 .platform_data = &mx51_efikamx_spi_flash_data,
 285                 .irq = -1,
 286         },
 287 };
 288
 289 static int mx51_efikamx_spi_cs[] = {
 290         EFIKAMX_SPI_CS0,
 291         EFIKAMX_SPI_CS1,
 292 };
 293
 294 static const struct spi_imx_master mx51_efikamx_spi_pdata __initconst = {
 295         .chipselect     = mx51_efikamx_spi_cs,
 296         .num_chipselect = ARRAY_SIZE(mx51_efikamx_spi_cs),
 297 };
 298
 299 static void __init mxc_board_init(void)
 300 {
 301         mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
 302                                         ARRAY_SIZE(mx51efikamx_pads));
 303         mx51_efikamx_board_id();
 304         mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
 305         mxc_init_imx_uart();
 306         imx51_add_esdhc(0, NULL);
 307
 308         /* on < 1.2 boards both SD controllers are used */
 309         if (system_rev < 0x12) {
 310                 imx51_add_esdhc(1, NULL);
 311                 mx51_efikamx_leds[2].default_trigger = "mmc1";
 312         }
 313
 314         platform_device_register(&mx51_efikamx_leds_device);
 315         imx51_add_gpio_keys(&mx51_efikamx_powerkey_data);
 316
 317         spi_register_board_info(mx51_efikamx_spi_board_info,
 318                 ARRAY_SIZE(mx51_efikamx_spi_board_info));
 319         imx51_add_ecspi(0, &mx51_efikamx_spi_pdata);
 320 }
 321
 322 static void __init mx51_efikamx_timer_init(void)
 323 {
 324         mx51_clocks_init(32768, 24000000, 22579200, 24576000);
 325 }
 326
 327 static struct sys_timer mxc_timer = {
 328         .init   = mx51_efikamx_timer_init,
 329 };
 330
 331 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
 332         /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
 333         .boot_params = MX51_PHYS_OFFSET + 0x100,
 334         .map_io = mx51_map_io,
 335         .init_irq = mx51_init_irq,
 336         .init_machine =  mxc_board_init,
 337         .timer = &mxc_timer,
 338 MACHINE_END