125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
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*/
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/ulpi.h>
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#include "board-mx31moboard.h"
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#include "common.h"
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#include "devices-imx31.h"
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#include "ehci.h"
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#include "hardware.h"
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#include "iomux-mx3.h"
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#include "ulpi.h"
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static unsigned int smartbot_pins[] = {
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/* UART1 */
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MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
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MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
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/* ENABLES */
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MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
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MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
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};
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static const struct imxuart_platform_data uart_pdata __initconst = {
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.flags = IMXUART_HAVE_RTSCTS,
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};
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static const struct fsl_usb2_platform_data usb_pdata __initconst = {
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.operating_mode = FSL_USB2_DR_DEVICE,
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.phy_mode = FSL_USB2_PHY_ULPI,
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};
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#if defined(CONFIG_USB_ULPI)
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static int smartbot_otg_init(struct platform_device *pdev)
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{
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return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
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}
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static struct mxc_usbh_platform_data otg_host_pdata __initdata = {
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.init = smartbot_otg_init,
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.portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
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};
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static int __init smartbot_otg_host_init(void)
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{
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struct platform_device *pdev;
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otg_host_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
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ULPI_OTG_DRVVBUS_EXT);
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if (!otg_host_pdata.otg)
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return -ENODEV;
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pdev = imx31_add_mxc_ehci_otg(&otg_host_pdata);
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return PTR_ERR_OR_ZERO(pdev);
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}
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#else
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static inline int smartbot_otg_host_init(void) { return 0; }
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#endif
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#define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
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#define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
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#define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
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#define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
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static void smartbot_resets_init(void)
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{
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if (!gpio_request(POWER_EN, "power-enable")) {
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gpio_direction_output(POWER_EN, 0);
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gpio_export(POWER_EN, false);
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}
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if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
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gpio_direction_output(DSPIC_RST_B, 0);
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gpio_export(DSPIC_RST_B, false);
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}
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if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
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gpio_direction_output(TRSLAT_RST_B, 0);
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gpio_export(TRSLAT_RST_B, false);
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}
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if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
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gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
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gpio_export(TRSLAT_SRC_CHOICE, false);
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}
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}
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/*
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* system init for baseboard usage. Will be called by mx31moboard init.
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*/
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void __init mx31moboard_smartbot_init(int board)
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{
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printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
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mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
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"smartbot");
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imx31_add_imx_uart1(&uart_pdata);
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switch (board) {
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case MX31SMARTBOT:
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imx31_add_fsl_usb2_udc(&usb_pdata);
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break;
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case MX31EYEBOT:
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smartbot_otg_host_init();
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break;
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default:
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printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
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board);
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}
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smartbot_resets_init();
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}
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