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 "common.h"
  26 #include "devices-imx31.h"
  27 #include "ehci.h"
  28 #include "hardware.h"
  29 #include "iomux-mx3.h"
  30 #include "ulpi.h"
  31
  32 static unsigned int devboard_pins[] = {
  33         /* UART1 */
  34         MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
  35         MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
  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         /* USB H1 */
  42         MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
  43         MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
  44         MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
  45         MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
  46         MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
  47         /* SEL */
  48         MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
  49         MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
  50 };
  51
  52 static const struct imxuart_platform_data uart_pdata __initconst = {
  53         .flags = IMXUART_HAVE_RTSCTS,
  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 devboard_sdhc2_get_ro(struct device *dev)
  60 {
  61         return !gpio_get_value(SDHC2_WP);
  62 }
  63
  64 static int devboard_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 devboard_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 = devboard_sdhc2_get_ro,
 105         .init   = devboard_sdhc2_init,
 106         .exit   = devboard_sdhc2_exit,
 107 };
 108
 109 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 110 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 111 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
 112 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
 113
 114 static void devboard_init_sel_gpios(void)
 115 {
 116         if (!gpio_request(SEL0, "sel0")) {
 117                 gpio_direction_input(SEL0);
 118                 gpio_export(SEL0, true);
 119         }
 120
 121         if (!gpio_request(SEL1, "sel1")) {
 122                 gpio_direction_input(SEL1);
 123                 gpio_export(SEL1, true);
 124         }
 125
 126         if (!gpio_request(SEL2, "sel2")) {
 127                 gpio_direction_input(SEL2);
 128                 gpio_export(SEL2, true);
 129         }
 130
 131         if (!gpio_request(SEL3, "sel3")) {
 132                 gpio_direction_input(SEL3);
 133                 gpio_export(SEL3, true);
 134         }
 135 }
 136 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
 137                         PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
 138
 139 static int devboard_usbh1_hw_init(struct platform_device *pdev)
 140 {
 141         mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
 142
 143         mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
 144         mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
 145         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
 146         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
 147         mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
 148         mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
 149         mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
 150         mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
 151
 152         mdelay(10);
 153
 154         return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
 155                         MXC_EHCI_INTERFACE_SINGLE_UNI);
 156 }
 157
 158 #define USBH1_VBUSEN_B  IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
 159 #define USBH1_MODE      IOMUX_TO_GPIO(MX31_PIN_NFALE)
 160
 161 static int devboard_isp1105_init(struct usb_phy *otg)
 162 {
 163         int ret = gpio_request(USBH1_MODE, "usbh1-mode");
 164         if (ret)
 165                 return ret;
 166         /* single ended */
 167         gpio_direction_output(USBH1_MODE, 0);
 168
 169         ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
 170         if (ret) {
 171                 gpio_free(USBH1_MODE);
 172                 return ret;
 173         }
 174         gpio_direction_output(USBH1_VBUSEN_B, 1);
 175
 176         return 0;
 177 }
 178
 179
 180 static int devboard_isp1105_set_vbus(struct usb_otg *otg, bool on)
 181 {
 182         if (on)
 183                 gpio_set_value(USBH1_VBUSEN_B, 0);
 184         else
 185                 gpio_set_value(USBH1_VBUSEN_B, 1);
 186
 187         return 0;
 188 }
 189
 190 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
 191         .init   = devboard_usbh1_hw_init,
 192         .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
 193 };
 194
 195 static int __init devboard_usbh1_init(void)
 196 {
 197         struct usb_phy *phy;
 198         struct platform_device *pdev;
 199
 200         phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 201         if (!phy)
 202                 return -ENOMEM;
 203
 204         phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
 205         if (!phy->otg) {
 206                 kfree(phy);
 207                 return -ENOMEM;
 208         }
 209
 210         phy->label      = "ISP1105";
 211         phy->init       = devboard_isp1105_init;
 212         phy->otg->set_vbus      = devboard_isp1105_set_vbus;
 213
 214         usbh1_pdata.otg = phy;
 215
 216         pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
 217
 218         return PTR_ERR_OR_ZERO(pdev);
 219 }
 220
 221
 222 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
 223         .operating_mode = FSL_USB2_DR_DEVICE,
 224         .phy_mode       = FSL_USB2_PHY_ULPI,
 225 };
 226
 227 /*
 228  * system init for baseboard usage. Will be called by mx31moboard init.
 229  */
 230 void __init mx31moboard_devboard_init(void)
 231 {
 232         printk(KERN_INFO "Initializing mx31devboard peripherals\n");
 233
 234         mxc_iomux_setup_multiple_pins(devboard_pins, ARRAY_SIZE(devboard_pins),
 235                 "devboard");
 236
 237         imx31_add_imx_uart1(&uart_pdata);
 238
 239         imx31_add_mxc_mmc(1, &sdhc2_pdata);
 240
 241         devboard_init_sel_gpios();
 242
 243         imx31_add_fsl_usb2_udc(&usb_pdata);
 244
 245         devboard_usbh1_init();
 246 }