forked from Minki/linux
eacae5d2b9
The davinci ohci driver name (currently "ohci") is too generic. To be consistent with other usb dirvers, append the "-da8xx" postfix to the name. Signed-off-by: Axel Haslam <ahaslam@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
406 lines
9.3 KiB
C
406 lines
9.3 KiB
C
/*
|
|
* OHCI HCD (Host Controller Driver) for USB.
|
|
*
|
|
* TI DA8xx (OMAP-L1x) Bus Glue
|
|
*
|
|
* Derived from: ohci-omap.c and ohci-s3c2410.c
|
|
* Copyright (C) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public License
|
|
* version 2. This program is licensed "as is" without any warranty of any
|
|
* kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/phy/phy.h>
|
|
#include <linux/platform_data/usb-davinci.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/hcd.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "ohci.h"
|
|
|
|
#define DRIVER_DESC "DA8XX"
|
|
#define DRV_NAME "ohci-da8xx"
|
|
|
|
static struct hc_driver __read_mostly ohci_da8xx_hc_driver;
|
|
|
|
static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq,
|
|
u16 wValue, u16 wIndex, char *buf, u16 wLength);
|
|
static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf);
|
|
|
|
static struct clk *usb11_clk;
|
|
static struct phy *usb11_phy;
|
|
|
|
/* Over-current indicator change bitmask */
|
|
static volatile u16 ocic_mask;
|
|
|
|
static int ohci_da8xx_enable(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(usb11_clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = phy_init(usb11_phy);
|
|
if (ret)
|
|
goto err_phy_init;
|
|
|
|
ret = phy_power_on(usb11_phy);
|
|
if (ret)
|
|
goto err_phy_power_on;
|
|
|
|
return 0;
|
|
|
|
err_phy_power_on:
|
|
phy_exit(usb11_phy);
|
|
err_phy_init:
|
|
clk_disable_unprepare(usb11_clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ohci_da8xx_disable(void)
|
|
{
|
|
phy_power_off(usb11_phy);
|
|
phy_exit(usb11_phy);
|
|
clk_disable_unprepare(usb11_clk);
|
|
}
|
|
|
|
/*
|
|
* Handle the port over-current indicator change.
|
|
*/
|
|
static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub,
|
|
unsigned port)
|
|
{
|
|
ocic_mask |= 1 << port;
|
|
|
|
/* Once over-current is detected, the port needs to be powered down */
|
|
if (hub->get_oci(port) > 0)
|
|
hub->set_power(port, 0);
|
|
}
|
|
|
|
static int ohci_da8xx_reset(struct usb_hcd *hcd)
|
|
{
|
|
struct device *dev = hcd->self.controller;
|
|
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
int result;
|
|
u32 rh_a;
|
|
|
|
dev_dbg(dev, "starting USB controller\n");
|
|
|
|
result = ohci_da8xx_enable();
|
|
if (result < 0)
|
|
return result;
|
|
|
|
/*
|
|
* DA8xx only have 1 port connected to the pins but the HC root hub
|
|
* register A reports 2 ports, thus we'll have to override it...
|
|
*/
|
|
ohci->num_ports = 1;
|
|
|
|
result = ohci_setup(hcd);
|
|
if (result < 0) {
|
|
ohci_da8xx_disable();
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Since we're providing a board-specific root hub port power control
|
|
* and over-current reporting, we have to override the HC root hub A
|
|
* register's default value, so that ohci_hub_control() could return
|
|
* the correct hub descriptor...
|
|
*/
|
|
rh_a = ohci_readl(ohci, &ohci->regs->roothub.a);
|
|
if (hub->set_power) {
|
|
rh_a &= ~RH_A_NPS;
|
|
rh_a |= RH_A_PSM;
|
|
}
|
|
if (hub->get_oci) {
|
|
rh_a &= ~RH_A_NOCP;
|
|
rh_a |= RH_A_OCPM;
|
|
}
|
|
rh_a &= ~RH_A_POTPGT;
|
|
rh_a |= hub->potpgt << 24;
|
|
ohci_writel(ohci, rh_a, &ohci->regs->roothub.a);
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Update the status data from the hub with the over-current indicator change.
|
|
*/
|
|
static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf)
|
|
{
|
|
int length = orig_ohci_hub_status_data(hcd, buf);
|
|
|
|
/* See if we have OCIC bit set on port 1 */
|
|
if (ocic_mask & (1 << 1)) {
|
|
dev_dbg(hcd->self.controller, "over-current indicator change "
|
|
"on port 1\n");
|
|
|
|
if (!length)
|
|
length = 1;
|
|
|
|
buf[0] |= 1 << 1;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
/*
|
|
* Look at the control requests to the root hub and see if we need to override.
|
|
*/
|
|
static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
|
|
u16 wIndex, char *buf, u16 wLength)
|
|
{
|
|
struct device *dev = hcd->self.controller;
|
|
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
|
|
int temp;
|
|
|
|
switch (typeReq) {
|
|
case GetPortStatus:
|
|
/* Check the port number */
|
|
if (wIndex != 1)
|
|
break;
|
|
|
|
dev_dbg(dev, "GetPortStatus(%u)\n", wIndex);
|
|
|
|
temp = roothub_portstatus(hcd_to_ohci(hcd), wIndex - 1);
|
|
|
|
/* The port power status (PPS) bit defaults to 1 */
|
|
if (hub->get_power && hub->get_power(wIndex) == 0)
|
|
temp &= ~RH_PS_PPS;
|
|
|
|
/* The port over-current indicator (POCI) bit is always 0 */
|
|
if (hub->get_oci && hub->get_oci(wIndex) > 0)
|
|
temp |= RH_PS_POCI;
|
|
|
|
/* The over-current indicator change (OCIC) bit is 0 too */
|
|
if (ocic_mask & (1 << wIndex))
|
|
temp |= RH_PS_OCIC;
|
|
|
|
put_unaligned(cpu_to_le32(temp), (__le32 *)buf);
|
|
return 0;
|
|
case SetPortFeature:
|
|
temp = 1;
|
|
goto check_port;
|
|
case ClearPortFeature:
|
|
temp = 0;
|
|
|
|
check_port:
|
|
/* Check the port number */
|
|
if (wIndex != 1)
|
|
break;
|
|
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_POWER:
|
|
dev_dbg(dev, "%sPortFeature(%u): %s\n",
|
|
temp ? "Set" : "Clear", wIndex, "POWER");
|
|
|
|
if (!hub->set_power)
|
|
return -EPIPE;
|
|
|
|
return hub->set_power(wIndex, temp) ? -EPIPE : 0;
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
dev_dbg(dev, "%sPortFeature(%u): %s\n",
|
|
temp ? "Set" : "Clear", wIndex,
|
|
"C_OVER_CURRENT");
|
|
|
|
if (temp)
|
|
ocic_mask |= 1 << wIndex;
|
|
else
|
|
ocic_mask &= ~(1 << wIndex);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return orig_ohci_hub_control(hcd, typeReq, wValue,
|
|
wIndex, buf, wLength);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int ohci_da8xx_probe(struct platform_device *pdev)
|
|
{
|
|
struct da8xx_ohci_root_hub *hub = dev_get_platdata(&pdev->dev);
|
|
struct usb_hcd *hcd;
|
|
struct resource *mem;
|
|
int error, irq;
|
|
|
|
if (hub == NULL)
|
|
return -ENODEV;
|
|
|
|
usb11_clk = devm_clk_get(&pdev->dev, "usb11");
|
|
if (IS_ERR(usb11_clk)) {
|
|
if (PTR_ERR(usb11_clk) != -EPROBE_DEFER)
|
|
dev_err(&pdev->dev, "Failed to get clock.\n");
|
|
return PTR_ERR(usb11_clk);
|
|
}
|
|
|
|
usb11_phy = devm_phy_get(&pdev->dev, "usb-phy");
|
|
if (IS_ERR(usb11_phy)) {
|
|
if (PTR_ERR(usb11_phy) != -EPROBE_DEFER)
|
|
dev_err(&pdev->dev, "Failed to get phy.\n");
|
|
return PTR_ERR(usb11_phy);
|
|
}
|
|
|
|
hcd = usb_create_hcd(&ohci_da8xx_hc_driver, &pdev->dev,
|
|
dev_name(&pdev->dev));
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
hcd->regs = devm_ioremap_resource(&pdev->dev, mem);
|
|
if (IS_ERR(hcd->regs)) {
|
|
error = PTR_ERR(hcd->regs);
|
|
goto err;
|
|
}
|
|
hcd->rsrc_start = mem->start;
|
|
hcd->rsrc_len = resource_size(mem);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
error = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
error = usb_add_hcd(hcd, irq, 0);
|
|
if (error)
|
|
goto err;
|
|
|
|
device_wakeup_enable(hcd->self.controller);
|
|
|
|
if (hub->ocic_notify) {
|
|
error = hub->ocic_notify(ohci_da8xx_ocic_handler);
|
|
if (!error)
|
|
return 0;
|
|
}
|
|
|
|
usb_remove_hcd(hcd);
|
|
err:
|
|
usb_put_hcd(hcd);
|
|
return error;
|
|
}
|
|
|
|
static int ohci_da8xx_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
struct da8xx_ohci_root_hub *hub = dev_get_platdata(&pdev->dev);
|
|
|
|
hub->ocic_notify(NULL);
|
|
usb_remove_hcd(hcd);
|
|
usb_put_hcd(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ohci_da8xx_suspend(struct platform_device *pdev,
|
|
pm_message_t message)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
bool do_wakeup = device_may_wakeup(&pdev->dev);
|
|
int ret;
|
|
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
ret = ohci_suspend(hcd, do_wakeup);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ohci_da8xx_disable();
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ohci_da8xx_resume(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
int ret;
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
ret = ohci_da8xx_enable();
|
|
if (ret)
|
|
return ret;
|
|
|
|
dev->dev.power.power_state = PMSG_ON;
|
|
usb_hcd_resume_root_hub(hcd);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct ohci_driver_overrides da8xx_overrides __initconst = {
|
|
.reset = ohci_da8xx_reset,
|
|
};
|
|
|
|
/*
|
|
* Driver definition to register with platform structure.
|
|
*/
|
|
static struct platform_driver ohci_hcd_da8xx_driver = {
|
|
.probe = ohci_da8xx_probe,
|
|
.remove = ohci_da8xx_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ohci_da8xx_suspend,
|
|
.resume = ohci_da8xx_resume,
|
|
#endif
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
};
|
|
|
|
static int __init ohci_da8xx_init(void)
|
|
{
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
pr_info("%s: " DRIVER_DESC "\n", DRV_NAME);
|
|
ohci_init_driver(&ohci_da8xx_hc_driver, &da8xx_overrides);
|
|
|
|
/*
|
|
* The Davinci da8xx HW has some unusual quirks, which require
|
|
* da8xx-specific workarounds. We override certain hc_driver
|
|
* functions here to achieve that. We explicitly do not enhance
|
|
* ohci_driver_overrides to allow this more easily, since this
|
|
* is an unusual case, and we don't want to encourage others to
|
|
* override these functions by making it too easy.
|
|
*/
|
|
|
|
orig_ohci_hub_control = ohci_da8xx_hc_driver.hub_control;
|
|
orig_ohci_hub_status_data = ohci_da8xx_hc_driver.hub_status_data;
|
|
|
|
ohci_da8xx_hc_driver.hub_status_data = ohci_da8xx_hub_status_data;
|
|
ohci_da8xx_hc_driver.hub_control = ohci_da8xx_hub_control;
|
|
|
|
return platform_driver_register(&ohci_hcd_da8xx_driver);
|
|
}
|
|
module_init(ohci_da8xx_init);
|
|
|
|
static void __exit ohci_da8xx_exit(void)
|
|
{
|
|
platform_driver_unregister(&ohci_hcd_da8xx_driver);
|
|
}
|
|
module_exit(ohci_da8xx_exit);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|