458 lines
10 KiB
C
458 lines
10 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/interrupt.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include <mach/da8xx.h>
|
|
#include <linux/platform_data/usb-davinci.h>
|
|
|
|
#ifndef CONFIG_ARCH_DAVINCI_DA8XX
|
|
#error "This file is DA8xx bus glue. Define CONFIG_ARCH_DAVINCI_DA8XX."
|
|
#endif
|
|
|
|
#define CFGCHIP2 DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)
|
|
|
|
static struct clk *usb11_clk;
|
|
static struct clk *usb20_clk;
|
|
|
|
/* Over-current indicator change bitmask */
|
|
static volatile u16 ocic_mask;
|
|
|
|
static void ohci_da8xx_clock(int on)
|
|
{
|
|
u32 cfgchip2;
|
|
|
|
cfgchip2 = __raw_readl(CFGCHIP2);
|
|
if (on) {
|
|
clk_enable(usb11_clk);
|
|
|
|
/*
|
|
* If USB 1.1 reference clock is sourced from USB 2.0 PHY, we
|
|
* need to enable the USB 2.0 module clocking, start its PHY,
|
|
* and not allow it to stop the clock during USB 2.0 suspend.
|
|
*/
|
|
if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX)) {
|
|
clk_enable(usb20_clk);
|
|
|
|
cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN);
|
|
cfgchip2 |= CFGCHIP2_PHY_PLLON;
|
|
__raw_writel(cfgchip2, CFGCHIP2);
|
|
|
|
pr_info("Waiting for USB PHY clock good...\n");
|
|
while (!(__raw_readl(CFGCHIP2) & CFGCHIP2_PHYCLKGD))
|
|
cpu_relax();
|
|
}
|
|
|
|
/* Enable USB 1.1 PHY */
|
|
cfgchip2 |= CFGCHIP2_USB1SUSPENDM;
|
|
} else {
|
|
clk_disable(usb11_clk);
|
|
if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX))
|
|
clk_disable(usb20_clk);
|
|
|
|
/* Disable USB 1.1 PHY */
|
|
cfgchip2 &= ~CFGCHIP2_USB1SUSPENDM;
|
|
}
|
|
__raw_writel(cfgchip2, CFGCHIP2);
|
|
}
|
|
|
|
/*
|
|
* 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_init(struct usb_hcd *hcd)
|
|
{
|
|
struct device *dev = hcd->self.controller;
|
|
struct da8xx_ohci_root_hub *hub = dev->platform_data;
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
int result;
|
|
u32 rh_a;
|
|
|
|
dev_dbg(dev, "starting USB controller\n");
|
|
|
|
ohci_da8xx_clock(1);
|
|
|
|
/*
|
|
* 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_init(ohci);
|
|
if (result < 0)
|
|
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;
|
|
}
|
|
|
|
static void ohci_da8xx_stop(struct usb_hcd *hcd)
|
|
{
|
|
ohci_stop(hcd);
|
|
ohci_da8xx_clock(0);
|
|
}
|
|
|
|
static int ohci_da8xx_start(struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
int result;
|
|
|
|
result = ohci_run(ohci);
|
|
if (result < 0)
|
|
ohci_da8xx_stop(hcd);
|
|
|
|
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 = 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->platform_data;
|
|
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 ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
|
|
}
|
|
|
|
static const struct hc_driver ohci_da8xx_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "DA8xx OHCI",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_USB11 | HCD_MEMORY,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ohci_da8xx_init,
|
|
.start = ohci_da8xx_start,
|
|
.stop = ohci_da8xx_stop,
|
|
.shutdown = ohci_shutdown,
|
|
|
|
/*
|
|
* managing i/o requests and associated device resources
|
|
*/
|
|
.urb_enqueue = ohci_urb_enqueue,
|
|
.urb_dequeue = ohci_urb_dequeue,
|
|
.endpoint_disable = ohci_endpoint_disable,
|
|
|
|
/*
|
|
* scheduling support
|
|
*/
|
|
.get_frame_number = ohci_get_frame,
|
|
|
|
/*
|
|
* root hub support
|
|
*/
|
|
.hub_status_data = ohci_da8xx_hub_status_data,
|
|
.hub_control = ohci_da8xx_hub_control,
|
|
|
|
#ifdef CONFIG_PM
|
|
.bus_suspend = ohci_bus_suspend,
|
|
.bus_resume = ohci_bus_resume,
|
|
#endif
|
|
.start_port_reset = ohci_start_port_reset,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
|
|
/**
|
|
* usb_hcd_da8xx_probe - initialize DA8xx-based HCDs
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Allocates basic resources for this USB host controller, and
|
|
* then invokes the start() method for the HCD associated with it
|
|
* through the hotplug entry's driver_data.
|
|
*/
|
|
static int usb_hcd_da8xx_probe(const struct hc_driver *driver,
|
|
struct platform_device *pdev)
|
|
{
|
|
struct da8xx_ohci_root_hub *hub = pdev->dev.platform_data;
|
|
struct usb_hcd *hcd;
|
|
struct resource *mem;
|
|
int error, irq;
|
|
|
|
if (hub == NULL)
|
|
return -ENODEV;
|
|
|
|
usb11_clk = clk_get(&pdev->dev, "usb11");
|
|
if (IS_ERR(usb11_clk))
|
|
return PTR_ERR(usb11_clk);
|
|
|
|
usb20_clk = clk_get(&pdev->dev, "usb20");
|
|
if (IS_ERR(usb20_clk)) {
|
|
error = PTR_ERR(usb20_clk);
|
|
goto err0;
|
|
}
|
|
|
|
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
|
|
if (!hcd) {
|
|
error = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem) {
|
|
error = -ENODEV;
|
|
goto err2;
|
|
}
|
|
hcd->rsrc_start = mem->start;
|
|
hcd->rsrc_len = resource_size(mem);
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
|
dev_dbg(&pdev->dev, "request_mem_region failed\n");
|
|
error = -EBUSY;
|
|
goto err2;
|
|
}
|
|
|
|
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
|
if (!hcd->regs) {
|
|
dev_err(&pdev->dev, "ioremap failed\n");
|
|
error = -ENOMEM;
|
|
goto err3;
|
|
}
|
|
|
|
ohci_hcd_init(hcd_to_ohci(hcd));
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
error = -ENODEV;
|
|
goto err4;
|
|
}
|
|
error = usb_add_hcd(hcd, irq, 0);
|
|
if (error)
|
|
goto err4;
|
|
|
|
if (hub->ocic_notify) {
|
|
error = hub->ocic_notify(ohci_da8xx_ocic_handler);
|
|
if (!error)
|
|
return 0;
|
|
}
|
|
|
|
usb_remove_hcd(hcd);
|
|
err4:
|
|
iounmap(hcd->regs);
|
|
err3:
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
err2:
|
|
usb_put_hcd(hcd);
|
|
err1:
|
|
clk_put(usb20_clk);
|
|
err0:
|
|
clk_put(usb11_clk);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* usb_hcd_da8xx_remove - shutdown processing for DA8xx-based HCDs
|
|
* @dev: USB Host Controller being removed
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Reverses the effect of usb_hcd_da8xx_probe(), first invoking
|
|
* the HCD's stop() method. It is always called from a thread
|
|
* context, normally "rmmod", "apmd", or something similar.
|
|
*/
|
|
static inline void
|
|
usb_hcd_da8xx_remove(struct usb_hcd *hcd, struct platform_device *pdev)
|
|
{
|
|
struct da8xx_ohci_root_hub *hub = pdev->dev.platform_data;
|
|
|
|
hub->ocic_notify(NULL);
|
|
usb_remove_hcd(hcd);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
clk_put(usb20_clk);
|
|
clk_put(usb11_clk);
|
|
}
|
|
|
|
static int ohci_hcd_da8xx_drv_probe(struct platform_device *dev)
|
|
{
|
|
return usb_hcd_da8xx_probe(&ohci_da8xx_hc_driver, dev);
|
|
}
|
|
|
|
static int ohci_hcd_da8xx_drv_remove(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
|
|
usb_hcd_da8xx_remove(hcd, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ohci_da8xx_suspend(struct platform_device *dev, pm_message_t message)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
ohci_da8xx_clock(0);
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
dev->dev.power.power_state = PMSG_SUSPEND;
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
ohci_da8xx_clock(1);
|
|
dev->dev.power.power_state = PMSG_ON;
|
|
usb_hcd_resume_root_hub(hcd);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Driver definition to register with platform structure.
|
|
*/
|
|
static struct platform_driver ohci_hcd_da8xx_driver = {
|
|
.probe = ohci_hcd_da8xx_drv_probe,
|
|
.remove = ohci_hcd_da8xx_drv_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ohci_da8xx_suspend,
|
|
.resume = ohci_da8xx_resume,
|
|
#endif
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ohci",
|
|
},
|
|
};
|
|
|
|
MODULE_ALIAS("platform:ohci");
|