272 lines
6.8 KiB
C
272 lines
6.8 KiB
C
/*
|
|
* OHCI HCD (Host Controller Driver) for USB.
|
|
*
|
|
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
|
|
* (C) Copyright 2000-2005 David Brownell
|
|
* (C) Copyright 2002 Hewlett-Packard Company
|
|
* (C) Copyright 2008 Magnus Damm
|
|
*
|
|
* SM501 Bus Glue - based on ohci-omap.c
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/sm501.h>
|
|
#include <linux/sm501-regs.h>
|
|
|
|
static int ohci_sm501_init(struct usb_hcd *hcd)
|
|
{
|
|
return ohci_init(hcd_to_ohci(hcd));
|
|
}
|
|
|
|
static int ohci_sm501_start(struct usb_hcd *hcd)
|
|
{
|
|
struct device *dev = hcd->self.controller;
|
|
int ret;
|
|
|
|
ret = ohci_run(hcd_to_ohci(hcd));
|
|
if (ret < 0) {
|
|
dev_err(dev, "can't start %s", hcd->self.bus_name);
|
|
ohci_stop(hcd);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ohci_sm501_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "SM501 OHCI",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ohci_sm501_init,
|
|
.start = ohci_sm501_start,
|
|
.stop = ohci_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_hub_status_data,
|
|
.hub_control = ohci_hub_control,
|
|
#ifdef CONFIG_PM
|
|
.bus_suspend = ohci_bus_suspend,
|
|
.bus_resume = ohci_bus_resume,
|
|
#endif
|
|
.start_port_reset = ohci_start_port_reset,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int ohci_hcd_sm501_drv_probe(struct platform_device *pdev)
|
|
{
|
|
const struct hc_driver *driver = &ohci_sm501_hc_driver;
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res, *mem;
|
|
int retval, irq;
|
|
struct usb_hcd *hcd = NULL;
|
|
|
|
irq = retval = platform_get_irq(pdev, 0);
|
|
if (retval < 0)
|
|
goto err0;
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (mem == NULL) {
|
|
dev_err(dev, "no resource definition for memory\n");
|
|
retval = -ENOENT;
|
|
goto err0;
|
|
}
|
|
|
|
if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
|
|
dev_err(dev, "request_mem_region failed\n");
|
|
retval = -EBUSY;
|
|
goto err0;
|
|
}
|
|
|
|
/* The sm501 chip is equipped with local memory that may be used
|
|
* by on-chip devices such as the video controller and the usb host.
|
|
* This driver uses dma_declare_coherent_memory() to make sure
|
|
* usb allocations with dma_alloc_coherent() allocate from
|
|
* this local memory. The dma_handle returned by dma_alloc_coherent()
|
|
* will be an offset starting from 0 for the first local memory byte.
|
|
*
|
|
* So as long as data is allocated using dma_alloc_coherent() all is
|
|
* fine. This is however not always the case - buffers may be allocated
|
|
* using kmalloc() - so the usb core needs to be told that it must copy
|
|
* data into our local memory if the buffers happen to be placed in
|
|
* regular memory. The HCD_LOCAL_MEM flag does just that.
|
|
*/
|
|
|
|
if (!dma_declare_coherent_memory(dev, mem->start,
|
|
mem->start - mem->parent->start,
|
|
resource_size(mem),
|
|
DMA_MEMORY_MAP |
|
|
DMA_MEMORY_EXCLUSIVE)) {
|
|
dev_err(dev, "cannot declare coherent memory\n");
|
|
retval = -ENXIO;
|
|
goto err1;
|
|
}
|
|
|
|
/* allocate, reserve and remap resources for registers */
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res == NULL) {
|
|
dev_err(dev, "no resource definition for registers\n");
|
|
retval = -ENOENT;
|
|
goto err2;
|
|
}
|
|
|
|
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
|
|
if (!hcd) {
|
|
retval = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
hcd->rsrc_start = res->start;
|
|
hcd->rsrc_len = resource_size(res);
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, pdev->name)) {
|
|
dev_err(dev, "request_mem_region failed\n");
|
|
retval = -EBUSY;
|
|
goto err3;
|
|
}
|
|
|
|
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
|
if (hcd->regs == NULL) {
|
|
dev_err(dev, "cannot remap registers\n");
|
|
retval = -ENXIO;
|
|
goto err4;
|
|
}
|
|
|
|
ohci_hcd_init(hcd_to_ohci(hcd));
|
|
|
|
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
|
if (retval)
|
|
goto err5;
|
|
device_wakeup_enable(hcd->self.controller);
|
|
|
|
/* enable power and unmask interrupts */
|
|
|
|
sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
|
|
sm501_modify_reg(dev->parent, SM501_IRQ_MASK, 1 << 6, 0);
|
|
|
|
return 0;
|
|
err5:
|
|
iounmap(hcd->regs);
|
|
err4:
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
err3:
|
|
usb_put_hcd(hcd);
|
|
err2:
|
|
dma_release_declared_memory(dev);
|
|
err1:
|
|
release_mem_region(mem->start, resource_size(mem));
|
|
err0:
|
|
return retval;
|
|
}
|
|
|
|
static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
struct resource *mem;
|
|
|
|
usb_remove_hcd(hcd);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
dma_release_declared_memory(&pdev->dev);
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (mem)
|
|
release_mem_region(mem->start, resource_size(mem));
|
|
|
|
/* mask interrupts and disable power */
|
|
|
|
sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
|
|
sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
bool do_wakeup = device_may_wakeup(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;
|
|
|
|
sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
|
|
return ret;
|
|
}
|
|
|
|
static int ohci_sm501_resume(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
|
|
ohci_resume(hcd, false);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define ohci_sm501_suspend NULL
|
|
#define ohci_sm501_resume NULL
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* Driver definition to register with the SM501 bus
|
|
*/
|
|
static struct platform_driver ohci_hcd_sm501_driver = {
|
|
.probe = ohci_hcd_sm501_drv_probe,
|
|
.remove = ohci_hcd_sm501_drv_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
.suspend = ohci_sm501_suspend,
|
|
.resume = ohci_sm501_resume,
|
|
.driver = {
|
|
.name = "sm501-usb",
|
|
},
|
|
};
|
|
MODULE_ALIAS("platform:sm501-usb");
|