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 
smartbot_otg_init(struct platform_device * pdev)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 
smartbot_otg_host_init(void)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
smartbot_otg_host_init(void)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 
smartbot_resets_init(void)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  */
mx31moboard_smartbot_init(int board)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 }
134