1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
  4 */
  5
  6#include <linux/delay.h>
  7#include <linux/gpio.h>
  8#include <linux/init.h>
  9#include <linux/interrupt.h>
 10#include <linux/i2c.h>
 11#include <linux/platform_device.h>
 12#include <linux/types.h>
 13
 14#include <linux/usb/otg.h>
 15#include <linux/usb/ulpi.h>
 16
 17#include "board-mx31moboard.h"
 18#include "common.h"
 19#include "devices-imx31.h"
 20#include "ehci.h"
 21#include "hardware.h"
 22#include "iomux-mx3.h"
 23#include "ulpi.h"
 24
 25static unsigned int smartbot_pins[] = {
 26	/* UART1 */
 27	MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
 28	MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
 29	/* ENABLES */
 30	MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
 31	MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
 32};
 33
 34static const struct imxuart_platform_data uart_pdata __initconst = {
 35	.flags = IMXUART_HAVE_RTSCTS,
 36};
 37
 38static const struct fsl_usb2_platform_data usb_pdata __initconst = {
 39	.operating_mode	= FSL_USB2_DR_DEVICE,
 40	.phy_mode	= FSL_USB2_PHY_ULPI,
 41};
 42
 43#if defined(CONFIG_USB_ULPI)
 44
 45static int smartbot_otg_init(struct platform_device *pdev)
 46{
 47	return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
 48}
 49
 50static struct mxc_usbh_platform_data otg_host_pdata __initdata = {
 51	.init	= smartbot_otg_init,
 52	.portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
 53};
 54
 55static int __init smartbot_otg_host_init(void)
 56{
 57	struct platform_device *pdev;
 58
 59	otg_host_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
 60		ULPI_OTG_DRVVBUS_EXT);
 61	if (!otg_host_pdata.otg)
 62		return -ENODEV;
 63
 64	pdev = imx31_add_mxc_ehci_otg(&otg_host_pdata);
 65
 66	return PTR_ERR_OR_ZERO(pdev);
 67}
 68#else
 69static inline int smartbot_otg_host_init(void) { return 0; }
 70#endif
 71
 72#define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 73#define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 74#define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
 75#define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
 76
 77static void smartbot_resets_init(void)
 78{
 79	if (!gpio_request(POWER_EN, "power-enable")) {
 80		gpio_direction_output(POWER_EN, 0);
 81		gpio_export(POWER_EN, false);
 82	}
 83
 84	if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
 85		gpio_direction_output(DSPIC_RST_B, 0);
 86		gpio_export(DSPIC_RST_B, false);
 87	}
 88
 89	if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
 90		gpio_direction_output(TRSLAT_RST_B, 0);
 91		gpio_export(TRSLAT_RST_B, false);
 92	}
 93
 94	if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
 95		gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
 96		gpio_export(TRSLAT_SRC_CHOICE, false);
 97	}
 98}
 99/*
100 * system init for baseboard usage. Will be called by mx31moboard init.
101 */
102void __init mx31moboard_smartbot_init(int board)
103{
104	printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
105
106	mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
107		"smartbot");
108
109	imx31_add_imx_uart1(&uart_pdata);
110
111	switch (board) {
112	case MX31SMARTBOT:
113		imx31_add_fsl_usb2_udc(&usb_pdata);
114		break;
115	case MX31EYEBOT:
116		smartbot_otg_host_init();
117		break;
118	default:
119		printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
120			board);
121	}
122
123	smartbot_resets_init();
124}