arch/arm/mach-imx/mx31moboard-devboard.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/gpio.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/delay.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/slab.h>
  21 #include <linux/types.h>
  22
  23 #include <linux/usb/otg.h>
  24
  25 #include "board-mx31moboard.h"
  26 #include "common.h"
  27 #include "devices-imx31.h"
  28 #include "ehci.h"
  29 #include "hardware.h"
  30 #include "iomux-mx3.h"
  31 #include "ulpi.h"
  32
  33 static unsigned int devboard_pins[] = {
  34         /* UART1 */
  35         MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
  36         MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
  37         /* SDHC2 */
  38         MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
  39         MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
  40         MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
  41         MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
  42         /* USB H1 */
  43         MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
  44         MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
  45         MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
  46         MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
  47         MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
  48         /* SEL */
  49         MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
  50         MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
  51 };
  52
  53 static const struct imxuart_platform_data uart_pdata __initconst = {
  54         .flags = IMXUART_HAVE_RTSCTS,
  55 };
  56
  57 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
  58 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
  59
  60 static int devboard_sdhc2_get_ro(struct device *dev)
  61 {
  62         return !gpio_get_value(SDHC2_WP);
  63 }
  64
  65 static int devboard_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
  66                 void *data)
  67 {
  68         int ret;
  69
  70         ret = gpio_request(SDHC2_CD, "sdhc-detect");
  71         if (ret)
  72                 return ret;
  73
  74         gpio_direction_input(SDHC2_CD);
  75
  76         ret = gpio_request(SDHC2_WP, "sdhc-wp");
  77         if (ret)
  78                 goto err_gpio_free;
  79         gpio_direction_input(SDHC2_WP);
  80
  81         ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
  82                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
  83                 "sdhc2-card-detect", data);
  84         if (ret)
  85                 goto err_gpio_free_2;
  86
  87         return 0;
  88
  89 err_gpio_free_2:
  90         gpio_free(SDHC2_WP);
  91 err_gpio_free:
  92         gpio_free(SDHC2_CD);
  93
  94         return ret;
  95 }
  96
  97 static void devboard_sdhc2_exit(struct device *dev, void *data)
  98 {
  99         free_irq(gpio_to_irq(SDHC2_CD), data);
 100         gpio_free(SDHC2_WP);
 101         gpio_free(SDHC2_CD);
 102 }
 103
 104 static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
 105         .get_ro = devboard_sdhc2_get_ro,
 106         .init   = devboard_sdhc2_init,
 107         .exit   = devboard_sdhc2_exit,
 108 };
 109
 110 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 111 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 112 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
 113 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
 114
 115 static void devboard_init_sel_gpios(void)
 116 {
 117         if (!gpio_request(SEL0, "sel0")) {
 118                 gpio_direction_input(SEL0);
 119                 gpio_export(SEL0, true);
 120         }
 121
 122         if (!gpio_request(SEL1, "sel1")) {
 123                 gpio_direction_input(SEL1);
 124                 gpio_export(SEL1, true);
 125         }
 126
 127         if (!gpio_request(SEL2, "sel2")) {
 128                 gpio_direction_input(SEL2);
 129                 gpio_export(SEL2, true);
 130         }
 131
 132         if (!gpio_request(SEL3, "sel3")) {
 133                 gpio_direction_input(SEL3);
 134                 gpio_export(SEL3, true);
 135         }
 136 }
 137 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
 138                         PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
 139
 140 static int devboard_usbh1_hw_init(struct platform_device *pdev)
 141 {
 142         mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
 143
 144         mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
 145         mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
 146         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
 147         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
 148         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
 149         mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
 150         mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
 151         mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
 152
 153         mdelay(10);
 154
 155         return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
 156                         MXC_EHCI_INTERFACE_SINGLE_UNI);
 157 }
 158
 159 #define USBH1_VBUSEN_B  IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
 160 #define USBH1_MODE      IOMUX_TO_GPIO(MX31_PIN_NFALE)
 161
 162 static int devboard_isp1105_init(struct usb_phy *otg)
 163 {
 164         int ret = gpio_request(USBH1_MODE, "usbh1-mode");
 165         if (ret)
 166                 return ret;
 167         /* single ended */
 168         gpio_direction_output(USBH1_MODE, 0);
 169
 170         ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
 171         if (ret) {
 172                 gpio_free(USBH1_MODE);
 173                 return ret;
 174         }
 175         gpio_direction_output(USBH1_VBUSEN_B, 1);
 176
 177         return 0;
 178 }
 179
 180
 181 static int devboard_isp1105_set_vbus(struct usb_otg *otg, bool on)
 182 {
 183         if (on)
 184                 gpio_set_value(USBH1_VBUSEN_B, 0);
 185         else
 186                 gpio_set_value(USBH1_VBUSEN_B, 1);
 187
 188         return 0;
 189 }
 190
 191 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
 192         .init   = devboard_usbh1_hw_init,
 193         .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
 194 };
 195
 196 static int __init devboard_usbh1_init(void)
 197 {
 198         struct usb_phy *phy;
 199         struct platform_device *pdev;
 200
 201         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 202         if (!phy)
 203                 return -ENOMEM;
 204
 205         phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
 206         if (!phy->otg) {
 207                 kfree(phy);
 208                 return -ENOMEM;
 209         }
 210
 211         phy->label      = "ISP1105";
 212         phy->init       = devboard_isp1105_init;
 213         phy->otg->set_vbus      = devboard_isp1105_set_vbus;
 214
 215         usbh1_pdata.otg = phy;
 216
 217         pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
 218
 219         return PTR_ERR_OR_ZERO(pdev);
 220 }
 221
 222
 223 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
 224         .operating_mode = FSL_USB2_DR_DEVICE,
 225         .phy_mode       = FSL_USB2_PHY_ULPI,
 226 };
 227
 228 /*
 229  * system init for baseboard usage. Will be called by mx31moboard init.
 230  */
 231 void __init mx31moboard_devboard_init(void)
 232 {
 233         printk(KERN_INFO "Initializing mx31devboard peripherals\n");
 234
 235         mxc_iomux_setup_multiple_pins(devboard_pins, ARRAY_SIZE(devboard_pins),
 236                 "devboard");
 237
 238         imx31_add_imx_uart1(&uart_pdata);
 239
 240         imx31_add_mxc_mmc(1, &sdhc2_pdata);
 241
 242         devboard_init_sel_gpios();
 243
 244         imx31_add_fsl_usb2_udc(&usb_pdata);
 245
 246         devboard_usbh1_init();
 247 }