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
 34static 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
 43static const struct imxuart_platform_data uart_pdata __initconst = {
 44	.flags = IMXUART_HAVE_RTSCTS,
 45};
 46
 47static 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
 54static int smartbot_otg_init(struct platform_device *pdev)
 55{
 56	return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
 57}
 58
 59static 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
 64static 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
 78static 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
 86static 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 */
111void __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}