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linux-sg2042/arch/arm/mach-omap2/usb-host.c

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/*
* usb-host.c - OMAP USB Host
*
* This file will contain the board specific details for the
* Synopsys EHCI/OHCI host controller on OMAP3430 and onwards
*
* Copyright (C) 2007-2011 Texas Instruments
* Author: Vikram Pandita <vikram.pandita@ti.com>
* Author: Keshava Munegowda <keshava_mgowda@ti.com>
*
* Generalization by:
* Felipe Balbi <balbi@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <linux/string.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/usb/phy.h>
#include <linux/usb/usb_phy_gen_xceiv.h>
#include "soc.h"
#include "omap_device.h"
#include "mux.h"
#include "usb.h"
#ifdef CONFIG_MFD_OMAP_USB_HOST
#define OMAP_USBHS_DEVICE "usbhs_omap"
#define OMAP_USBTLL_DEVICE "usbhs_tll"
#define USBHS_UHH_HWMODNAME "usb_host_hs"
#define USBHS_TLL_HWMODNAME "usb_tll_hs"
/* MUX settings for EHCI pins */
/*
* setup_ehci_io_mux - initialize IO pad mux for USBHOST
*/
static void __init setup_ehci_io_mux(const enum usbhs_omap_port_mode *port_mode)
{
switch (port_mode[0]) {
case OMAP_EHCI_PORT_MODE_PHY:
omap_mux_init_signal("hsusb1_stp", OMAP_PIN_OUTPUT);
omap_mux_init_signal("hsusb1_clk", OMAP_PIN_OUTPUT);
omap_mux_init_signal("hsusb1_dir", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_nxt", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data0", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data1", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data2", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data3", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data4", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data5", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data6", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_data7", OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_EHCI_PORT_MODE_TLL:
omap_mux_init_signal("hsusb1_tll_stp",
OMAP_PIN_INPUT_PULLUP);
omap_mux_init_signal("hsusb1_tll_clk",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_dir",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_nxt",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data1",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data2",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data3",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data4",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data5",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data6",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb1_tll_data7",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
/* FALLTHROUGH */
default:
break;
}
switch (port_mode[1]) {
case OMAP_EHCI_PORT_MODE_PHY:
omap_mux_init_signal("hsusb2_stp", OMAP_PIN_OUTPUT);
omap_mux_init_signal("hsusb2_clk", OMAP_PIN_OUTPUT);
omap_mux_init_signal("hsusb2_dir", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_nxt", OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data1",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data2",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data3",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data4",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data5",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data6",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_data7",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_EHCI_PORT_MODE_TLL:
omap_mux_init_signal("hsusb2_tll_stp",
OMAP_PIN_INPUT_PULLUP);
omap_mux_init_signal("hsusb2_tll_clk",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_dir",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_nxt",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data1",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data2",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data3",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data4",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data5",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data6",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb2_tll_data7",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
/* FALLTHROUGH */
default:
break;
}
switch (port_mode[2]) {
case OMAP_EHCI_PORT_MODE_PHY:
printk(KERN_WARNING "Port3 can't be used in PHY mode\n");
break;
case OMAP_EHCI_PORT_MODE_TLL:
omap_mux_init_signal("hsusb3_tll_stp",
OMAP_PIN_INPUT_PULLUP);
omap_mux_init_signal("hsusb3_tll_clk",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_dir",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_nxt",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data1",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data2",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data3",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data4",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data5",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data6",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("hsusb3_tll_data7",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
/* FALLTHROUGH */
default:
break;
}
return;
}
static void __init setup_ohci_io_mux(const enum usbhs_omap_port_mode *port_mode)
{
switch (port_mode[0]) {
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
omap_mux_init_signal("mm1_rxdp",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("mm1_rxdm",
OMAP_PIN_INPUT_PULLDOWN);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
omap_mux_init_signal("mm1_rxrcv",
OMAP_PIN_INPUT_PULLDOWN);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
omap_mux_init_signal("mm1_txen_n", OMAP_PIN_OUTPUT);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
omap_mux_init_signal("mm1_txse0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("mm1_txdat",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
/* FALLTHROUGH */
default:
break;
}
switch (port_mode[1]) {
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
omap_mux_init_signal("mm2_rxdp",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("mm2_rxdm",
OMAP_PIN_INPUT_PULLDOWN);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
omap_mux_init_signal("mm2_rxrcv",
OMAP_PIN_INPUT_PULLDOWN);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
omap_mux_init_signal("mm2_txen_n", OMAP_PIN_OUTPUT);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
omap_mux_init_signal("mm2_txse0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("mm2_txdat",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
/* FALLTHROUGH */
default:
break;
}
switch (port_mode[2]) {
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
omap_mux_init_signal("mm3_rxdp",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("mm3_rxdm",
OMAP_PIN_INPUT_PULLDOWN);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
omap_mux_init_signal("mm3_rxrcv",
OMAP_PIN_INPUT_PULLDOWN);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
omap_mux_init_signal("mm3_txen_n", OMAP_PIN_OUTPUT);
/* FALLTHROUGH */
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
omap_mux_init_signal("mm3_txse0",
OMAP_PIN_INPUT_PULLDOWN);
omap_mux_init_signal("mm3_txdat",
OMAP_PIN_INPUT_PULLDOWN);
break;
case OMAP_USBHS_PORT_MODE_UNUSED:
/* FALLTHROUGH */
default:
break;
}
}
void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
{
struct omap_hwmod *uhh_hwm, *tll_hwm;
struct platform_device *pdev;
int bus_id = -1;
if (cpu_is_omap34xx()) {
setup_ehci_io_mux(pdata->port_mode);
setup_ohci_io_mux(pdata->port_mode);
if (omap_rev() <= OMAP3430_REV_ES2_1)
pdata->single_ulpi_bypass = true;
}
uhh_hwm = omap_hwmod_lookup(USBHS_UHH_HWMODNAME);
if (!uhh_hwm) {
pr_err("Could not look up %s\n", USBHS_UHH_HWMODNAME);
return;
}
tll_hwm = omap_hwmod_lookup(USBHS_TLL_HWMODNAME);
if (!tll_hwm) {
pr_err("Could not look up %s\n", USBHS_TLL_HWMODNAME);
return;
}
pdev = omap_device_build(OMAP_USBTLL_DEVICE, bus_id, tll_hwm,
pdata, sizeof(*pdata));
if (IS_ERR(pdev)) {
pr_err("Could not build hwmod device %s\n",
USBHS_TLL_HWMODNAME);
return;
}
pdev = omap_device_build(OMAP_USBHS_DEVICE, bus_id, uhh_hwm,
pdata, sizeof(*pdata));
if (IS_ERR(pdev)) {
pr_err("Could not build hwmod devices %s\n",
USBHS_UHH_HWMODNAME);
return;
}
}
#else
void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
{
}
#endif
/* Template for PHY regulators */
static struct fixed_voltage_config hsusb_reg_config = {
/* .supply_name filled later */
.microvolts = 3300000,
.gpio = -1, /* updated later */
.startup_delay = 70000, /* 70msec */
.enable_high = 1, /* updated later */
.enabled_at_boot = 0, /* keep in RESET */
/* .init_data filled later */
};
static const char *nop_name = "usb_phy_gen_xceiv"; /* NOP PHY driver */
static const char *reg_name = "reg-fixed-voltage"; /* Regulator driver */
/**
* usbhs_add_regulator - Add a gpio based fixed voltage regulator device
* @name: name for the regulator
* @dev_id: device id of the device this regulator supplies power to
* @dev_supply: supply name that the device expects
* @gpio: GPIO number
* @polarity: 1 - Active high, 0 - Active low
*/
static int usbhs_add_regulator(char *name, char *dev_id, char *dev_supply,
int gpio, int polarity)
{
struct regulator_consumer_supply *supplies;
struct regulator_init_data *reg_data;
struct fixed_voltage_config *config;
struct platform_device *pdev;
struct platform_device_info pdevinfo;
int ret = -ENOMEM;
supplies = kzalloc(sizeof(*supplies), GFP_KERNEL);
if (!supplies)
return -ENOMEM;
supplies->supply = dev_supply;
supplies->dev_name = dev_id;
reg_data = kzalloc(sizeof(*reg_data), GFP_KERNEL);
if (!reg_data)
goto err_data;
reg_data->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
reg_data->consumer_supplies = supplies;
reg_data->num_consumer_supplies = 1;
config = kmemdup(&hsusb_reg_config, sizeof(hsusb_reg_config),
GFP_KERNEL);
if (!config)
goto err_config;
config->supply_name = kstrdup(name, GFP_KERNEL);
if (!config->supply_name)
goto err_supplyname;
config->gpio = gpio;
config->enable_high = polarity;
config->init_data = reg_data;
/* create a regulator device */
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = reg_name;
pdevinfo.id = PLATFORM_DEVID_AUTO;
pdevinfo.data = config;
pdevinfo.size_data = sizeof(*config);
pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(pdev)) {
ret = PTR_ERR(pdev);
pr_err("%s: Failed registering regulator %s for %s : %d\n",
__func__, name, dev_id, ret);
goto err_register;
}
return 0;
err_register:
kfree(config->supply_name);
err_supplyname:
kfree(config);
err_config:
kfree(reg_data);
err_data:
kfree(supplies);
return ret;
}
#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;
struct usb_phy_gen_xceiv_platform_data nop_pdata;
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;
}
/* set platform data */
memset(&nop_pdata, 0, sizeof(nop_pdata));
if (gpio_is_valid(phy->vcc_gpio))
nop_pdata.needs_vcc = true;
nop_pdata.gpio_reset = phy->reset_gpio;
nop_pdata.type = USB_PHY_TYPE_USB2;
/* create a NOP PHY device */
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = nop_name;
pdevinfo.id = phy->port;
pdevinfo.data = &nop_pdata;
pdevinfo.size_data =
sizeof(struct usb_phy_gen_xceiv_platform_data);
scnprintf(phy_id, MAX_STR, "usb_phy_gen_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 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;
}
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