arch/arm/mach-imx/mach-cpuimx51sd.c

   1 /*
   2  *
   3  * Copyright (C) 2010 Eric Bénard <eric@eukrea.com>
   4  *
   5  * based on board-mx51_babbage.c which is
   6  * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
   7  * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
   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/i2c/tsc2007.h>
  21 #include <linux/gpio.h>
  22 #include <linux/delay.h>
  23 #include <linux/io.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/i2c-gpio.h>
  26 #include <linux/spi/spi.h>
  27 #include <linux/can/platform/mcp251x.h>
  28
  29 #include <mach/eukrea-baseboards.h>
  30 #include <mach/common.h>
  31 #include <mach/hardware.h>
  32 #include <mach/iomux-mx51.h>
  33
  34 #include <asm/setup.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37 #include <asm/mach/time.h>
  38
  39 #include "devices-imx51.h"
  40 #include "cpu_op-mx51.h"
  41
  42 #define USBH1_RST               IMX_GPIO_NR(2, 28)
  43 #define ETH_RST                 IMX_GPIO_NR(2, 31)
  44 #define TSC2007_IRQGPIO         IMX_GPIO_NR(3, 12)
  45 #define CAN_IRQGPIO             IMX_GPIO_NR(1, 1)
  46 #define CAN_RST                 IMX_GPIO_NR(4, 15)
  47 #define CAN_NCS                 IMX_GPIO_NR(4, 24)
  48 #define CAN_RXOBF               IMX_GPIO_NR(1, 4)
  49 #define CAN_RX1BF               IMX_GPIO_NR(1, 6)
  50 #define CAN_TXORTS              IMX_GPIO_NR(1, 7)
  51 #define CAN_TX1RTS              IMX_GPIO_NR(1, 8)
  52 #define CAN_TX2RTS              IMX_GPIO_NR(1, 9)
  53 #define I2C_SCL                 IMX_GPIO_NR(4, 16)
  54 #define I2C_SDA                 IMX_GPIO_NR(4, 17)
  55
  56 /* USB_CTRL_1 */
  57 #define MX51_USB_CTRL_1_OFFSET          0x10
  58 #define MX51_USB_CTRL_UH1_EXT_CLK_EN    (1 << 25)
  59
  60 #define MX51_USB_PLLDIV_12_MHZ          0x00
  61 #define MX51_USB_PLL_DIV_19_2_MHZ       0x01
  62 #define MX51_USB_PLL_DIV_24_MHZ         0x02
  63
  64 static iomux_v3_cfg_t eukrea_cpuimx51sd_pads[] = {
  65         /* UART1 */
  66         MX51_PAD_UART1_RXD__UART1_RXD,
  67         MX51_PAD_UART1_TXD__UART1_TXD,
  68         MX51_PAD_UART1_RTS__UART1_RTS,
  69         MX51_PAD_UART1_CTS__UART1_CTS,
  70
  71         /* USB HOST1 */
  72         MX51_PAD_USBH1_CLK__USBH1_CLK,
  73         MX51_PAD_USBH1_DIR__USBH1_DIR,
  74         MX51_PAD_USBH1_NXT__USBH1_NXT,
  75         MX51_PAD_USBH1_DATA0__USBH1_DATA0,
  76         MX51_PAD_USBH1_DATA1__USBH1_DATA1,
  77         MX51_PAD_USBH1_DATA2__USBH1_DATA2,
  78         MX51_PAD_USBH1_DATA3__USBH1_DATA3,
  79         MX51_PAD_USBH1_DATA4__USBH1_DATA4,
  80         MX51_PAD_USBH1_DATA5__USBH1_DATA5,
  81         MX51_PAD_USBH1_DATA6__USBH1_DATA6,
  82         MX51_PAD_USBH1_DATA7__USBH1_DATA7,
  83         MX51_PAD_USBH1_STP__USBH1_STP,
  84         MX51_PAD_EIM_CS3__GPIO2_28,             /* PHY nRESET */
  85
  86         /* FEC */
  87         MX51_PAD_EIM_DTACK__GPIO2_31,           /* PHY nRESET */
  88
  89         /* HSI2C */
  90         MX51_PAD_I2C1_CLK__GPIO4_16,
  91         MX51_PAD_I2C1_DAT__GPIO4_17,
  92
  93         /* CAN */
  94         MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
  95         MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
  96         MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
  97         MX51_PAD_CSPI1_SS0__GPIO4_24,           /* nCS */
  98         MX51_PAD_CSI2_PIXCLK__GPIO4_15,         /* nReset */
  99         MX51_PAD_GPIO1_1__GPIO1_1,              /* IRQ */
 100         MX51_PAD_GPIO1_4__GPIO1_4,              /* Control signals */
 101         MX51_PAD_GPIO1_6__GPIO1_6,
 102         MX51_PAD_GPIO1_7__GPIO1_7,
 103         MX51_PAD_GPIO1_8__GPIO1_8,
 104         MX51_PAD_GPIO1_9__GPIO1_9,
 105
 106         /* Touchscreen */
 107         /* IRQ */
 108         NEW_PAD_CTRL(MX51_PAD_GPIO_NAND__GPIO_NAND, PAD_CTL_PUS_22K_UP |
 109                         PAD_CTL_PKE | PAD_CTL_SRE_FAST |
 110                         PAD_CTL_DSE_HIGH | PAD_CTL_PUE | PAD_CTL_HYS),
 111 };
 112
 113 static const struct imxuart_platform_data uart_pdata __initconst = {
 114         .flags = IMXUART_HAVE_RTSCTS,
 115 };
 116
 117 static struct tsc2007_platform_data tsc2007_info = {
 118         .model                  = 2007,
 119         .x_plate_ohms           = 180,
 120 };
 121
 122 static struct i2c_board_info eukrea_cpuimx51sd_i2c_devices[] = {
 123         {
 124                 I2C_BOARD_INFO("pcf8563", 0x51),
 125         }, {
 126                 I2C_BOARD_INFO("tsc2007", 0x49),
 127                 .type           = "tsc2007",
 128                 .platform_data  = &tsc2007_info,
 129                 .irq            = IMX_GPIO_TO_IRQ(TSC2007_IRQGPIO),
 130         },
 131 };
 132
 133 static const struct mxc_nand_platform_data
 134                 eukrea_cpuimx51sd_nand_board_info __initconst = {
 135         .width          = 1,
 136         .hw_ecc         = 1,
 137         .flash_bbt      = 1,
 138 };
 139
 140 /* This function is board specific as the bit mask for the plldiv will also
 141 be different for other Freescale SoCs, thus a common bitmask is not
 142 possible and cannot get place in /plat-mxc/ehci.c.*/
 143 static int initialize_otg_port(struct platform_device *pdev)
 144 {
 145         u32 v;
 146         void __iomem *usb_base;
 147         void __iomem *usbother_base;
 148
 149         usb_base = ioremap(MX51_USB_OTG_BASE_ADDR, SZ_4K);
 150         if (!usb_base)
 151                 return -ENOMEM;
 152         usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
 153
 154         /* Set the PHY clock to 19.2MHz */
 155         v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 156         v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
 157         v |= MX51_USB_PLL_DIV_19_2_MHZ;
 158         __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 159         iounmap(usb_base);
 160
 161         mdelay(10);
 162
 163         return mx51_initialize_usb_hw(0, MXC_EHCI_INTERNAL_PHY);
 164 }
 165
 166 static int initialize_usbh1_port(struct platform_device *pdev)
 167 {
 168         u32 v;
 169         void __iomem *usb_base;
 170         void __iomem *usbother_base;
 171
 172         usb_base = ioremap(MX51_USB_OTG_BASE_ADDR, SZ_4K);
 173         if (!usb_base)
 174                 return -ENOMEM;
 175         usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
 176
 177         /* The clock for the USBH1 ULPI port will come from the PHY. */
 178         v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
 179         __raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN,
 180                         usbother_base + MX51_USB_CTRL_1_OFFSET);
 181         iounmap(usb_base);
 182
 183         mdelay(10);
 184
 185         return mx51_initialize_usb_hw(1, MXC_EHCI_POWER_PINS_ENABLED |
 186                         MXC_EHCI_ITC_NO_THRESHOLD);
 187 }
 188
 189 static const struct mxc_usbh_platform_data dr_utmi_config __initconst = {
 190         .init           = initialize_otg_port,
 191         .portsc = MXC_EHCI_UTMI_16BIT,
 192 };
 193
 194 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
 195         .operating_mode = FSL_USB2_DR_DEVICE,
 196         .phy_mode       = FSL_USB2_PHY_UTMI_WIDE,
 197 };
 198
 199 static const struct mxc_usbh_platform_data usbh1_config __initconst = {
 200         .init           = initialize_usbh1_port,
 201         .portsc = MXC_EHCI_MODE_ULPI,
 202 };
 203
 204 static int otg_mode_host;
 205
 206 static int __init eukrea_cpuimx51sd_otg_mode(char *options)
 207 {
 208         if (!strcmp(options, "host"))
 209                 otg_mode_host = 1;
 210         else if (!strcmp(options, "device"))
 211                 otg_mode_host = 0;
 212         else
 213                 pr_info("otg_mode neither \"host\" nor \"device\". "
 214                         "Defaulting to device\n");
 215         return 0;
 216 }
 217 __setup("otg_mode=", eukrea_cpuimx51sd_otg_mode);
 218
 219 static struct i2c_gpio_platform_data pdata = {
 220         .sda_pin                = I2C_SDA,
 221         .sda_is_open_drain      = 0,
 222         .scl_pin                = I2C_SCL,
 223         .scl_is_open_drain      = 0,
 224         .udelay                 = 2,
 225 };
 226
 227 static struct platform_device hsi2c_gpio_device = {
 228         .name                   = "i2c-gpio",
 229         .id                     = 0,
 230         .dev.platform_data      = &pdata,
 231 };
 232
 233 static struct mcp251x_platform_data mcp251x_info = {
 234         .oscillator_frequency = 24E6,
 235 };
 236
 237 static struct spi_board_info cpuimx51sd_spi_device[] = {
 238         {
 239                 .modalias        = "mcp2515",
 240                 .max_speed_hz    = 10000000,
 241                 .bus_num         = 0,
 242                 .mode           = SPI_MODE_0,
 243                 .chip_select     = 0,
 244                 .platform_data   = &mcp251x_info,
 245                 .irq             = IMX_GPIO_TO_IRQ(CAN_IRQGPIO)
 246         },
 247 };
 248
 249 static int cpuimx51sd_spi1_cs[] = {
 250         CAN_NCS,
 251 };
 252
 253 static const struct spi_imx_master cpuimx51sd_ecspi1_pdata __initconst = {
 254         .chipselect     = cpuimx51sd_spi1_cs,
 255         .num_chipselect = ARRAY_SIZE(cpuimx51sd_spi1_cs),
 256 };
 257
 258 static struct platform_device *platform_devices[] __initdata = {
 259         &hsi2c_gpio_device,
 260 };
 261
 262 static void __init eukrea_cpuimx51sd_init(void)
 263 {
 264         imx51_soc_init();
 265
 266         mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx51sd_pads,
 267                                         ARRAY_SIZE(eukrea_cpuimx51sd_pads));
 268
 269 #if defined(CONFIG_CPU_FREQ_IMX)
 270         get_cpu_op = mx51_get_cpu_op;
 271 #endif
 272
 273         imx51_add_imx_uart(0, &uart_pdata);
 274         imx51_add_mxc_nand(&eukrea_cpuimx51sd_nand_board_info);
 275         imx51_add_imx2_wdt(0, NULL);
 276
 277         gpio_request(ETH_RST, "eth_rst");
 278         gpio_set_value(ETH_RST, 1);
 279         imx51_add_fec(NULL);
 280
 281         gpio_request(CAN_IRQGPIO, "can_irq");
 282         gpio_direction_input(CAN_IRQGPIO);
 283         gpio_free(CAN_IRQGPIO);
 284         gpio_request(CAN_NCS, "can_ncs");
 285         gpio_direction_output(CAN_NCS, 1);
 286         gpio_free(CAN_NCS);
 287         gpio_request(CAN_RST, "can_rst");
 288         gpio_direction_output(CAN_RST, 0);
 289         msleep(20);
 290         gpio_set_value(CAN_RST, 1);
 291         imx51_add_ecspi(0, &cpuimx51sd_ecspi1_pdata);
 292         spi_register_board_info(cpuimx51sd_spi_device,
 293                                 ARRAY_SIZE(cpuimx51sd_spi_device));
 294
 295         gpio_request(TSC2007_IRQGPIO, "tsc2007_irq");
 296         gpio_direction_input(TSC2007_IRQGPIO);
 297         gpio_free(TSC2007_IRQGPIO);
 298
 299         i2c_register_board_info(0, eukrea_cpuimx51sd_i2c_devices,
 300                         ARRAY_SIZE(eukrea_cpuimx51sd_i2c_devices));
 301         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 302
 303         if (otg_mode_host)
 304                 imx51_add_mxc_ehci_otg(&dr_utmi_config);
 305         else {
 306                 initialize_otg_port(NULL);
 307                 imx51_add_fsl_usb2_udc(&usb_pdata);
 308         }
 309
 310         gpio_request(USBH1_RST, "usb_rst");
 311         gpio_direction_output(USBH1_RST, 0);
 312         msleep(20);
 313         gpio_set_value(USBH1_RST, 1);
 314         imx51_add_mxc_ehci_hs(1, &usbh1_config);
 315
 316 #ifdef CONFIG_MACH_EUKREA_MBIMXSD51_BASEBOARD
 317         eukrea_mbimxsd51_baseboard_init();
 318 #endif
 319 }
 320
 321 static void __init eukrea_cpuimx51sd_timer_init(void)
 322 {
 323         mx51_clocks_init(32768, 24000000, 22579200, 0);
 324 }
 325
 326 static struct sys_timer mxc_timer = {
 327         .init   = eukrea_cpuimx51sd_timer_init,
 328 };
 329
 330 MACHINE_START(EUKREA_CPUIMX51SD, "Eukrea CPUIMX51SD")
 331         /* Maintainer: Eric Bénard <eric@eukrea.com> */
 332         .atag_offset = 0x100,
 333         .map_io = mx51_map_io,
 334         .init_early = imx51_init_early,
 335         .init_irq = mx51_init_irq,
 336         .handle_irq = imx51_handle_irq,
 337         .timer = &mxc_timer,
 338         .init_machine = eukrea_cpuimx51sd_init,
 339         .restart        = mxc_restart,
 340 MACHINE_END