arch/arm/mach-imx/mx31moboard-marxbot.c

   1 /*
   2  * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/gpio.h>
  17 #include <linux/init.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/i2c.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/slab.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/types.h>
  24
  25 #include <linux/usb/otg.h>
  26
  27 #include "board-mx31moboard.h"
  28 #include "common.h"
  29 #include "devices-imx31.h"
  30 #include "ehci.h"
  31 #include "hardware.h"
  32 #include "iomux-mx3.h"
  33 #include "ulpi.h"
  34
  35 static unsigned int marxbot_pins[] = {
  36         /* SDHC2 */
  37         MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
  38         MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
  39         MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
  40         MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
  41         /* dsPIC resets */
  42         MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
  43         /*battery detection */
  44         MX31_PIN_LCS0__GPIO3_23,
  45         /* USB H1 */
  46         MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
  47         MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
  48         MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
  49         MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
  50         MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
  51         /* SEL */
  52         MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
  53         MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
  54 };
  55
  56 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
  57 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
  58
  59 static int marxbot_sdhc2_get_ro(struct device *dev)
  60 {
  61         return !gpio_get_value(SDHC2_WP);
  62 }
  63
  64 static int marxbot_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
  65                 void *data)
  66 {
  67         int ret;
  68
  69         ret = gpio_request(SDHC2_CD, "sdhc-detect");
  70         if (ret)
  71                 return ret;
  72
  73         gpio_direction_input(SDHC2_CD);
  74
  75         ret = gpio_request(SDHC2_WP, "sdhc-wp");
  76         if (ret)
  77                 goto err_gpio_free;
  78         gpio_direction_input(SDHC2_WP);
  79
  80         ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
  81                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
  82                 "sdhc2-card-detect", data);
  83         if (ret)
  84                 goto err_gpio_free_2;
  85
  86         return 0;
  87
  88 err_gpio_free_2:
  89         gpio_free(SDHC2_WP);
  90 err_gpio_free:
  91         gpio_free(SDHC2_CD);
  92
  93         return ret;
  94 }
  95
  96 static void marxbot_sdhc2_exit(struct device *dev, void *data)
  97 {
  98         free_irq(gpio_to_irq(SDHC2_CD), data);
  99         gpio_free(SDHC2_WP);
 100         gpio_free(SDHC2_CD);
 101 }
 102
 103 static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
 104         .get_ro = marxbot_sdhc2_get_ro,
 105         .init   = marxbot_sdhc2_init,
 106         .exit   = marxbot_sdhc2_exit,
 107 };
 108
 109 #define TRSLAT_RST_B    IOMUX_TO_GPIO(MX31_PIN_STXD5)
 110 #define DSPICS_RST_B    IOMUX_TO_GPIO(MX31_PIN_SRXD5)
 111
 112 static void dspics_resets_init(void)
 113 {
 114         if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
 115                 gpio_direction_output(TRSLAT_RST_B, 0);
 116                 gpio_export(TRSLAT_RST_B, false);
 117         }
 118
 119         if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
 120                 gpio_direction_output(DSPICS_RST_B, 0);
 121                 gpio_export(DSPICS_RST_B, false);
 122         }
 123 }
 124
 125 static struct spi_board_info marxbot_spi_board_info[] __initdata = {
 126         {
 127                 .modalias = "spidev",
 128                 .max_speed_hz = 300000,
 129                 .bus_num = 1,
 130                 .chip_select = 1, /* according spi1_cs[] ! */
 131         },
 132 };
 133
 134 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 135 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 136 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
 137 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
 138
 139 static void marxbot_init_sel_gpios(void)
 140 {
 141         if (!gpio_request(SEL0, "sel0")) {
 142                 gpio_direction_input(SEL0);
 143                 gpio_export(SEL0, true);
 144         }
 145
 146         if (!gpio_request(SEL1, "sel1")) {
 147                 gpio_direction_input(SEL1);
 148                 gpio_export(SEL1, true);
 149         }
 150
 151         if (!gpio_request(SEL2, "sel2")) {
 152                 gpio_direction_input(SEL2);
 153                 gpio_export(SEL2, true);
 154         }
 155
 156         if (!gpio_request(SEL3, "sel3")) {
 157                 gpio_direction_input(SEL3);
 158                 gpio_export(SEL3, true);
 159         }
 160 }
 161
 162 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
 163                         PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
 164
 165 static int marxbot_usbh1_hw_init(struct platform_device *pdev)
 166 {
 167         mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
 168
 169         mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
 170         mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
 171         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
 172         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
 173         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
 174         mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
 175         mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
 176         mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
 177
 178         mdelay(10);
 179
 180         return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
 181                         MXC_EHCI_INTERFACE_SINGLE_UNI);
 182 }
 183
 184 #define USBH1_VBUSEN_B  IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
 185 #define USBH1_MODE      IOMUX_TO_GPIO(MX31_PIN_NFALE)
 186
 187 static int marxbot_isp1105_init(struct usb_phy *otg)
 188 {
 189         int ret = gpio_request(USBH1_MODE, "usbh1-mode");
 190         if (ret)
 191                 return ret;
 192         /* single ended */
 193         gpio_direction_output(USBH1_MODE, 0);
 194
 195         ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
 196         if (ret) {
 197                 gpio_free(USBH1_MODE);
 198                 return ret;
 199         }
 200         gpio_direction_output(USBH1_VBUSEN_B, 1);
 201
 202         return 0;
 203 }
 204
 205
 206 static int marxbot_isp1105_set_vbus(struct usb_otg *otg, bool on)
 207 {
 208         if (on)
 209                 gpio_set_value(USBH1_VBUSEN_B, 0);
 210         else
 211                 gpio_set_value(USBH1_VBUSEN_B, 1);
 212
 213         return 0;
 214 }
 215
 216 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
 217         .init   = marxbot_usbh1_hw_init,
 218         .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
 219 };
 220
 221 static int __init marxbot_usbh1_init(void)
 222 {
 223         struct usb_phy *phy;
 224         struct platform_device *pdev;
 225
 226         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 227         if (!phy)
 228                 return -ENOMEM;
 229
 230         phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
 231         if (!phy->otg) {
 232                 kfree(phy);
 233                 return -ENOMEM;
 234         }
 235
 236         phy->label      = "ISP1105";
 237         phy->init       = marxbot_isp1105_init;
 238         phy->otg->set_vbus      = marxbot_isp1105_set_vbus;
 239
 240         usbh1_pdata.otg = phy;
 241
 242         pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
 243
 244         return PTR_ERR_OR_ZERO(pdev);
 245 }
 246
 247 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
 248         .operating_mode = FSL_USB2_DR_DEVICE,
 249         .phy_mode       = FSL_USB2_PHY_ULPI,
 250 };
 251
 252 /*
 253  * system init for baseboard usage. Will be called by mx31moboard init.
 254  */
 255 void __init mx31moboard_marxbot_init(void)
 256 {
 257         printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
 258
 259         mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
 260                 "marxbot");
 261
 262         marxbot_init_sel_gpios();
 263
 264         dspics_resets_init();
 265
 266         imx31_add_mxc_mmc(1, &sdhc2_pdata);
 267
 268         spi_register_board_info(marxbot_spi_board_info,
 269                 ARRAY_SIZE(marxbot_spi_board_info));
 270
 271         /* battery present pin */
 272         gpio_request(IOMUX_TO_GPIO(MX31_PIN_LCS0), "bat-present");
 273         gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_LCS0));
 274         gpio_export(IOMUX_TO_GPIO(MX31_PIN_LCS0), false);
 275
 276         imx31_add_fsl_usb2_udc(&usb_pdata);
 277
 278         marxbot_usbh1_init();
 279 }