arch/arm/mach-imx/mx31moboard-smartbot.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/platform_device.h>
  21 #include <linux/types.h>
  22
  23 #include <linux/usb/otg.h>
  24 #include <linux/usb/ulpi.h>
  25
  26 #include "board-mx31moboard.h"
  27 #include "common.h"
  28 #include "devices-imx31.h"
  29 #include "ehci.h"
  30 #include "hardware.h"
  31 #include "iomux-mx3.h"
  32 #include "ulpi.h"
  33
  34 static unsigned int smartbot_pins[] = {
  35         /* UART1 */
  36         MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
  37         MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
  38         /* ENABLES */
  39         MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
  40         MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
  41 };
  42
  43 static const struct imxuart_platform_data uart_pdata __initconst = {
  44         .flags = IMXUART_HAVE_RTSCTS,
  45 };
  46
  47 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
  48         .operating_mode = FSL_USB2_DR_DEVICE,
  49         .phy_mode       = FSL_USB2_PHY_ULPI,
  50 };
  51
  52 #if defined(CONFIG_USB_ULPI)
  53
  54 static int smartbot_otg_init(struct platform_device *pdev)
  55 {
  56         return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
  57 }
  58
  59 static struct mxc_usbh_platform_data otg_host_pdata __initdata = {
  60         .init   = smartbot_otg_init,
  61         .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
  62 };
  63
  64 static int __init smartbot_otg_host_init(void)
  65 {
  66         struct platform_device *pdev;
  67
  68         otg_host_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
  69                 ULPI_OTG_DRVVBUS_EXT);
  70         if (!otg_host_pdata.otg)
  71                 return -ENODEV;
  72
  73         pdev = imx31_add_mxc_ehci_otg(&otg_host_pdata);
  74
  75         return PTR_ERR_OR_ZERO(pdev);
  76 }
  77 #else
  78 static inline int smartbot_otg_host_init(void) { return 0; }
  79 #endif
  80
  81 #define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
  82 #define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
  83 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
  84 #define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
  85
  86 static void smartbot_resets_init(void)
  87 {
  88         if (!gpio_request(POWER_EN, "power-enable")) {
  89                 gpio_direction_output(POWER_EN, 0);
  90                 gpio_export(POWER_EN, false);
  91         }
  92
  93         if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
  94                 gpio_direction_output(DSPIC_RST_B, 0);
  95                 gpio_export(DSPIC_RST_B, false);
  96         }
  97
  98         if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
  99                 gpio_direction_output(TRSLAT_RST_B, 0);
 100                 gpio_export(TRSLAT_RST_B, false);
 101         }
 102
 103         if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
 104                 gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
 105                 gpio_export(TRSLAT_SRC_CHOICE, false);
 106         }
 107 }
 108 /*
 109  * system init for baseboard usage. Will be called by mx31moboard init.
 110  */
 111 void __init mx31moboard_smartbot_init(int board)
 112 {
 113         printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
 114
 115         mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
 116                 "smartbot");
 117
 118         imx31_add_imx_uart1(&uart_pdata);
 119
 120         switch (board) {
 121         case MX31SMARTBOT:
 122                 imx31_add_fsl_usb2_udc(&usb_pdata);
 123                 break;
 124         case MX31EYEBOT:
 125                 smartbot_otg_host_init();
 126                 break;
 127         default:
 128                 printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
 129                         board);
 130         }
 131
 132         smartbot_resets_init();
 133 }