497 lines
14 KiB
C
497 lines
14 KiB
C
/*
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* usb-host.c - OMAP USB Host
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*
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* This file will contain the board specific details for the
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* Synopsys EHCI/OHCI host controller on OMAP3430 and onwards
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*
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* Copyright (C) 2007-2011 Texas Instruments
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* Author: Vikram Pandita <vikram.pandita@ti.com>
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* Author: Keshava Munegowda <keshava_mgowda@ti.com>
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*
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* Generalization by:
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* Felipe Balbi <balbi@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/fixed.h>
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#include <linux/string.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#include <linux/usb/phy.h>
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#include <linux/usb/nop-usb-xceiv.h>
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#include "soc.h"
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#include "omap_device.h"
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#include "mux.h"
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#include "usb.h"
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#ifdef CONFIG_MFD_OMAP_USB_HOST
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#define OMAP_USBHS_DEVICE "usbhs_omap"
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#define OMAP_USBTLL_DEVICE "usbhs_tll"
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#define USBHS_UHH_HWMODNAME "usb_host_hs"
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#define USBHS_TLL_HWMODNAME "usb_tll_hs"
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/* MUX settings for EHCI pins */
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/*
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* setup_ehci_io_mux - initialize IO pad mux for USBHOST
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*/
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static void __init setup_ehci_io_mux(const enum usbhs_omap_port_mode *port_mode)
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{
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switch (port_mode[0]) {
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case OMAP_EHCI_PORT_MODE_PHY:
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omap_mux_init_signal("hsusb1_stp", OMAP_PIN_OUTPUT);
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omap_mux_init_signal("hsusb1_clk", OMAP_PIN_OUTPUT);
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omap_mux_init_signal("hsusb1_dir", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_nxt", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data0", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data1", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data2", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data3", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data4", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data5", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data6", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_data7", OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_EHCI_PORT_MODE_TLL:
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omap_mux_init_signal("hsusb1_tll_stp",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("hsusb1_tll_clk",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_dir",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_nxt",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data1",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data2",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data3",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data4",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data5",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data6",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb1_tll_data7",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_USBHS_PORT_MODE_UNUSED:
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/* FALLTHROUGH */
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default:
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break;
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}
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switch (port_mode[1]) {
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case OMAP_EHCI_PORT_MODE_PHY:
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omap_mux_init_signal("hsusb2_stp", OMAP_PIN_OUTPUT);
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omap_mux_init_signal("hsusb2_clk", OMAP_PIN_OUTPUT);
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omap_mux_init_signal("hsusb2_dir", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_nxt", OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data1",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data2",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data3",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data4",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data5",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data6",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_data7",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_EHCI_PORT_MODE_TLL:
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omap_mux_init_signal("hsusb2_tll_stp",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("hsusb2_tll_clk",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_dir",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_nxt",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data1",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data2",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data3",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data4",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data5",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data6",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb2_tll_data7",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_USBHS_PORT_MODE_UNUSED:
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/* FALLTHROUGH */
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default:
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break;
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}
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switch (port_mode[2]) {
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case OMAP_EHCI_PORT_MODE_PHY:
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printk(KERN_WARNING "Port3 can't be used in PHY mode\n");
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break;
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case OMAP_EHCI_PORT_MODE_TLL:
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omap_mux_init_signal("hsusb3_tll_stp",
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OMAP_PIN_INPUT_PULLUP);
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omap_mux_init_signal("hsusb3_tll_clk",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_dir",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_nxt",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data1",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data2",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data3",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data4",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data5",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data6",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("hsusb3_tll_data7",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_USBHS_PORT_MODE_UNUSED:
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/* FALLTHROUGH */
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default:
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break;
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}
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return;
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}
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static void __init setup_ohci_io_mux(const enum usbhs_omap_port_mode *port_mode)
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{
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switch (port_mode[0]) {
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
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omap_mux_init_signal("mm1_rxdp",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("mm1_rxdm",
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OMAP_PIN_INPUT_PULLDOWN);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
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omap_mux_init_signal("mm1_rxrcv",
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OMAP_PIN_INPUT_PULLDOWN);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
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omap_mux_init_signal("mm1_txen_n", OMAP_PIN_OUTPUT);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
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omap_mux_init_signal("mm1_txse0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("mm1_txdat",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_USBHS_PORT_MODE_UNUSED:
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/* FALLTHROUGH */
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default:
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break;
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}
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switch (port_mode[1]) {
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
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omap_mux_init_signal("mm2_rxdp",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("mm2_rxdm",
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OMAP_PIN_INPUT_PULLDOWN);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
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omap_mux_init_signal("mm2_rxrcv",
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OMAP_PIN_INPUT_PULLDOWN);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
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omap_mux_init_signal("mm2_txen_n", OMAP_PIN_OUTPUT);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
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omap_mux_init_signal("mm2_txse0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("mm2_txdat",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_USBHS_PORT_MODE_UNUSED:
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/* FALLTHROUGH */
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default:
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break;
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}
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switch (port_mode[2]) {
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
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omap_mux_init_signal("mm3_rxdp",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("mm3_rxdm",
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OMAP_PIN_INPUT_PULLDOWN);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
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case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
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omap_mux_init_signal("mm3_rxrcv",
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OMAP_PIN_INPUT_PULLDOWN);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
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omap_mux_init_signal("mm3_txen_n", OMAP_PIN_OUTPUT);
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/* FALLTHROUGH */
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
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case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
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omap_mux_init_signal("mm3_txse0",
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OMAP_PIN_INPUT_PULLDOWN);
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omap_mux_init_signal("mm3_txdat",
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OMAP_PIN_INPUT_PULLDOWN);
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break;
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case OMAP_USBHS_PORT_MODE_UNUSED:
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/* FALLTHROUGH */
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default:
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break;
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}
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}
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void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
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{
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struct omap_hwmod *uhh_hwm, *tll_hwm;
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struct platform_device *pdev;
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int bus_id = -1;
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if (cpu_is_omap34xx()) {
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setup_ehci_io_mux(pdata->port_mode);
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setup_ohci_io_mux(pdata->port_mode);
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if (omap_rev() <= OMAP3430_REV_ES2_1)
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pdata->single_ulpi_bypass = true;
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}
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uhh_hwm = omap_hwmod_lookup(USBHS_UHH_HWMODNAME);
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if (!uhh_hwm) {
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pr_err("Could not look up %s\n", USBHS_UHH_HWMODNAME);
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return;
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}
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tll_hwm = omap_hwmod_lookup(USBHS_TLL_HWMODNAME);
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if (!tll_hwm) {
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pr_err("Could not look up %s\n", USBHS_TLL_HWMODNAME);
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return;
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}
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pdev = omap_device_build(OMAP_USBTLL_DEVICE, bus_id, tll_hwm,
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pdata, sizeof(*pdata));
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if (IS_ERR(pdev)) {
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pr_err("Could not build hwmod device %s\n",
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USBHS_TLL_HWMODNAME);
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return;
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}
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pdev = omap_device_build(OMAP_USBHS_DEVICE, bus_id, uhh_hwm,
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pdata, sizeof(*pdata));
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if (IS_ERR(pdev)) {
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pr_err("Could not build hwmod devices %s\n",
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USBHS_UHH_HWMODNAME);
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return;
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}
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}
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#else
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void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
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{
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}
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#endif
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/* Template for PHY regulators */
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static struct fixed_voltage_config hsusb_reg_config = {
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/* .supply_name filled later */
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.microvolts = 3300000,
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.gpio = -1, /* updated later */
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.startup_delay = 70000, /* 70msec */
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.enable_high = 1, /* updated later */
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.enabled_at_boot = 0, /* keep in RESET */
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/* .init_data filled later */
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};
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static const char *nop_name = "nop_usb_xceiv"; /* NOP PHY driver */
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static const char *reg_name = "reg-fixed-voltage"; /* Regulator driver */
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/**
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* usbhs_add_regulator - Add a gpio based fixed voltage regulator device
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* @name: name for the regulator
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* @dev_id: device id of the device this regulator supplies power to
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* @dev_supply: supply name that the device expects
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* @gpio: GPIO number
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* @polarity: 1 - Active high, 0 - Active low
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*/
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static int usbhs_add_regulator(char *name, char *dev_id, char *dev_supply,
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int gpio, int polarity)
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{
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struct regulator_consumer_supply *supplies;
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struct regulator_init_data *reg_data;
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struct fixed_voltage_config *config;
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struct platform_device *pdev;
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struct platform_device_info pdevinfo;
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int ret = -ENOMEM;
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supplies = kzalloc(sizeof(*supplies), GFP_KERNEL);
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if (!supplies)
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return -ENOMEM;
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supplies->supply = dev_supply;
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supplies->dev_name = dev_id;
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reg_data = kzalloc(sizeof(*reg_data), GFP_KERNEL);
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if (!reg_data)
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goto err_data;
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reg_data->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
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reg_data->consumer_supplies = supplies;
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reg_data->num_consumer_supplies = 1;
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config = kmemdup(&hsusb_reg_config, sizeof(hsusb_reg_config),
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GFP_KERNEL);
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if (!config)
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goto err_config;
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config->supply_name = kstrdup(name, GFP_KERNEL);
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if (!config->supply_name)
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goto err_supplyname;
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config->gpio = gpio;
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config->enable_high = polarity;
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config->init_data = reg_data;
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/* create a regulator device */
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memset(&pdevinfo, 0, sizeof(pdevinfo));
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pdevinfo.name = reg_name;
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pdevinfo.id = PLATFORM_DEVID_AUTO;
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pdevinfo.data = config;
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pdevinfo.size_data = sizeof(*config);
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pdev = platform_device_register_full(&pdevinfo);
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if (IS_ERR(pdev)) {
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ret = PTR_ERR(pdev);
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pr_err("%s: Failed registering regulator %s for %s : %d\n",
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__func__, name, dev_id, ret);
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goto err_register;
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}
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return 0;
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err_register:
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kfree(config->supply_name);
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err_supplyname:
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kfree(config);
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err_config:
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kfree(reg_data);
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err_data:
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kfree(supplies);
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return ret;
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}
|
|
|
|
#define MAX_STR 20
|
|
|
|
int usbhs_init_phys(struct usbhs_phy_data *phy, int num_phys)
|
|
{
|
|
char rail_name[MAX_STR];
|
|
int i;
|
|
struct platform_device *pdev;
|
|
char *phy_id;
|
|
struct platform_device_info pdevinfo;
|
|
|
|
for (i = 0; i < num_phys; i++) {
|
|
|
|
if (!phy->port) {
|
|
pr_err("%s: Invalid port 0. Must start from 1\n",
|
|
__func__);
|
|
continue;
|
|
}
|
|
|
|
/* do we need a NOP PHY device ? */
|
|
if (!gpio_is_valid(phy->reset_gpio) &&
|
|
!gpio_is_valid(phy->vcc_gpio))
|
|
continue;
|
|
|
|
phy_id = kmalloc(MAX_STR, GFP_KERNEL);
|
|
if (!phy_id) {
|
|
pr_err("%s: kmalloc() failed\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* create a NOP PHY device */
|
|
memset(&pdevinfo, 0, sizeof(pdevinfo));
|
|
pdevinfo.name = nop_name;
|
|
pdevinfo.id = phy->port;
|
|
pdevinfo.data = phy->platform_data;
|
|
pdevinfo.size_data = sizeof(struct nop_usb_xceiv_platform_data);
|
|
|
|
scnprintf(phy_id, MAX_STR, "nop_usb_xceiv.%d",
|
|
phy->port);
|
|
pdev = platform_device_register_full(&pdevinfo);
|
|
if (IS_ERR(pdev)) {
|
|
pr_err("%s: Failed to register device %s : %ld\n",
|
|
__func__, phy_id, PTR_ERR(pdev));
|
|
kfree(phy_id);
|
|
continue;
|
|
}
|
|
|
|
usb_bind_phy("ehci-omap.0", phy->port - 1, phy_id);
|
|
|
|
/* Do we need RESET regulator ? */
|
|
if (gpio_is_valid(phy->reset_gpio)) {
|
|
scnprintf(rail_name, MAX_STR,
|
|
"hsusb%d_reset", phy->port);
|
|
usbhs_add_regulator(rail_name, phy_id, "reset",
|
|
phy->reset_gpio, 1);
|
|
}
|
|
|
|
/* Do we need VCC regulator ? */
|
|
if (gpio_is_valid(phy->vcc_gpio)) {
|
|
scnprintf(rail_name, MAX_STR, "hsusb%d_vcc", phy->port);
|
|
usbhs_add_regulator(rail_name, phy_id, "vcc",
|
|
phy->vcc_gpio, phy->vcc_polarity);
|
|
}
|
|
|
|
phy++;
|
|
}
|
|
|
|
return 0;
|
|
}
|