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 <media/soc_camera.h>
 27
 28#include "board-mx31moboard.h"
 29#include "common.h"
 30#include "devices-imx31.h"
 31#include "ehci.h"
 32#include "hardware.h"
 33#include "iomux-mx3.h"
 34#include "ulpi.h"
 35
 36static unsigned int smartbot_pins[] = {
 37	/* UART1 */
 38	MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
 39	MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
 40	/* CSI */
 41	MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
 42	MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
 43	MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
 44	MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
 45	MX31_PIN_CSI_D12__CSI_D12, MX31_PIN_CSI_D13__CSI_D13,
 46	MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
 47	MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
 48	MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
 49	MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
 50	/* ENABLES */
 51	MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
 52	MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
 53};
 54
 55static const struct imxuart_platform_data uart_pdata __initconst = {
 56	.flags = IMXUART_HAVE_RTSCTS,
 57};
 58
 59#define CAM_POWER	IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
 60#define CAM_RST_B	IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)
 61
 62static int smartbot_cam_power(struct device *dev, int on)
 63{
 64	gpio_set_value(CAM_POWER, !on);
 65	return 0;
 66}
 67
 68static int smartbot_cam_reset(struct device *dev)
 69{
 70	gpio_set_value(CAM_RST_B, 0);
 71	udelay(100);
 72	gpio_set_value(CAM_RST_B, 1);
 73	return 0;
 74}
 75
 76static struct i2c_board_info smartbot_i2c_devices[] = {
 77	{
 78		I2C_BOARD_INFO("mt9t031", 0x5d),
 79	},
 80};
 81
 82static struct soc_camera_link base_iclink = {
 83	.bus_id		= 0,		/* Must match with the camera ID */
 84	.power		= smartbot_cam_power,
 85	.reset		= smartbot_cam_reset,
 86	.board_info	= &smartbot_i2c_devices[0],
 87	.i2c_adapter_id	= 0,
 88};
 89
 90static struct platform_device smartbot_camera[] = {
 91	{
 92		.name	= "soc-camera-pdrv",
 93		.id	= 0,
 94		.dev	= {
 95			.platform_data = &base_iclink,
 96		},
 97	},
 98};
 99
100static struct platform_device *smartbot_cameras[] __initdata = {
101	&smartbot_camera[0],
102};
103
104static int __init smartbot_cam_init(void)
105{
106	int ret = gpio_request(CAM_RST_B, "cam-reset");
107	if (ret)
108		return ret;
109	gpio_direction_output(CAM_RST_B, 1);
110	ret = gpio_request(CAM_POWER, "cam-standby");
111	if (ret)
112		return ret;
113	gpio_direction_output(CAM_POWER, 0);
114
115	return 0;
116}
117
118static const struct fsl_usb2_platform_data usb_pdata __initconst = {
119	.operating_mode	= FSL_USB2_DR_DEVICE,
120	.phy_mode	= FSL_USB2_PHY_ULPI,
121};
122
123#if defined(CONFIG_USB_ULPI)
124
125static int smartbot_otg_init(struct platform_device *pdev)
126{
127	return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
128}
129
130static struct mxc_usbh_platform_data otg_host_pdata __initdata = {
131	.init	= smartbot_otg_init,
132	.portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
133};
134
135static int __init smartbot_otg_host_init(void)
136{
137	struct platform_device *pdev;
138
139	otg_host_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
140		ULPI_OTG_DRVVBUS_EXT);
141	if (!otg_host_pdata.otg)
142		return -ENODEV;
143
144	pdev = imx31_add_mxc_ehci_otg(&otg_host_pdata);
145
146	return PTR_ERR_OR_ZERO(pdev);
147}
148#else
149static inline int smartbot_otg_host_init(void) { return 0; }
150#endif
151
152#define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
153#define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
154#define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
155#define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
156
157static void smartbot_resets_init(void)
158{
159	if (!gpio_request(POWER_EN, "power-enable")) {
160		gpio_direction_output(POWER_EN, 0);
161		gpio_export(POWER_EN, false);
162	}
163
164	if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
165		gpio_direction_output(DSPIC_RST_B, 0);
166		gpio_export(DSPIC_RST_B, false);
167	}
168
169	if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
170		gpio_direction_output(TRSLAT_RST_B, 0);
171		gpio_export(TRSLAT_RST_B, false);
172	}
173
174	if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
175		gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
176		gpio_export(TRSLAT_SRC_CHOICE, false);
177	}
178}
179/*
180 * system init for baseboard usage. Will be called by mx31moboard init.
181 */
182void __init mx31moboard_smartbot_init(int board)
183{
184	printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
185
186	mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
187		"smartbot");
188
189	imx31_add_imx_uart1(&uart_pdata);
190
191	switch (board) {
192	case MX31SMARTBOT:
193		imx31_add_fsl_usb2_udc(&usb_pdata);
194		break;
195	case MX31EYEBOT:
196		smartbot_otg_host_init();
197		break;
198	default:
199		printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
200			board);
201	}
202
203	smartbot_resets_init();
204
205	smartbot_cam_init();
206	platform_add_devices(smartbot_cameras, ARRAY_SIZE(smartbot_cameras));
207}