mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
219 lines
5 KiB
C
219 lines
5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* c67x00-drv.c: Cypress C67X00 USB Common infrastructure
|
|
*
|
|
* Copyright (C) 2006-2008 Barco N.V.
|
|
* Derived from the Cypress cy7c67200/300 ezusb linux driver and
|
|
* based on multiple host controller drivers inside the linux kernel.
|
|
*/
|
|
|
|
/*
|
|
* This file implements the common infrastructure for using the c67x00.
|
|
* It is both the link between the platform configuration and subdrivers and
|
|
* the link between the common hardware parts and the subdrivers (e.g.
|
|
* interrupt handling).
|
|
*
|
|
* The c67x00 has 2 SIE's (serial interface engine) which can be configured
|
|
* to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG).
|
|
*
|
|
* Depending on the platform configuration, the SIE's are created and
|
|
* the corresponding subdriver is initialized (c67x00_probe_sie).
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/list.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/c67x00.h>
|
|
|
|
#include "c67x00.h"
|
|
#include "c67x00-hcd.h"
|
|
|
|
static void c67x00_probe_sie(struct c67x00_sie *sie,
|
|
struct c67x00_device *dev, int sie_num)
|
|
{
|
|
spin_lock_init(&sie->lock);
|
|
sie->dev = dev;
|
|
sie->sie_num = sie_num;
|
|
sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
|
|
|
|
switch (sie->mode) {
|
|
case C67X00_SIE_HOST:
|
|
c67x00_hcd_probe(sie);
|
|
break;
|
|
|
|
case C67X00_SIE_UNUSED:
|
|
dev_info(sie_dev(sie),
|
|
"Not using SIE %d as requested\n", sie->sie_num);
|
|
break;
|
|
|
|
default:
|
|
dev_err(sie_dev(sie),
|
|
"Unsupported configuration: 0x%x for SIE %d\n",
|
|
sie->mode, sie->sie_num);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void c67x00_remove_sie(struct c67x00_sie *sie)
|
|
{
|
|
switch (sie->mode) {
|
|
case C67X00_SIE_HOST:
|
|
c67x00_hcd_remove(sie);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t c67x00_irq(int irq, void *__dev)
|
|
{
|
|
struct c67x00_device *c67x00 = __dev;
|
|
struct c67x00_sie *sie;
|
|
u16 msg, int_status;
|
|
int i, count = 8;
|
|
|
|
int_status = c67x00_ll_hpi_status(c67x00);
|
|
if (!int_status)
|
|
return IRQ_NONE;
|
|
|
|
while (int_status != 0 && (count-- >= 0)) {
|
|
c67x00_ll_irq(c67x00, int_status);
|
|
for (i = 0; i < C67X00_SIES; i++) {
|
|
sie = &c67x00->sie[i];
|
|
msg = 0;
|
|
if (int_status & SIEMSG_FLG(i))
|
|
msg = c67x00_ll_fetch_siemsg(c67x00, i);
|
|
if (sie->irq)
|
|
sie->irq(sie, int_status, msg);
|
|
}
|
|
int_status = c67x00_ll_hpi_status(c67x00);
|
|
}
|
|
|
|
if (int_status)
|
|
dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
|
|
"status = 0x%04x\n", int_status);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
static int c67x00_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct c67x00_device *c67x00;
|
|
struct c67x00_platform_data *pdata;
|
|
struct resource *res, *res2;
|
|
int ret, i;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return -ENODEV;
|
|
|
|
res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res2)
|
|
return -ENODEV;
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
if (!pdata)
|
|
return -ENODEV;
|
|
|
|
c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
|
|
if (!c67x00)
|
|
return -ENOMEM;
|
|
|
|
if (!request_mem_region(res->start, resource_size(res),
|
|
pdev->name)) {
|
|
dev_err(&pdev->dev, "Memory region busy\n");
|
|
ret = -EBUSY;
|
|
goto request_mem_failed;
|
|
}
|
|
c67x00->hpi.base = ioremap(res->start, resource_size(res));
|
|
if (!c67x00->hpi.base) {
|
|
dev_err(&pdev->dev, "Unable to map HPI registers\n");
|
|
ret = -EIO;
|
|
goto map_failed;
|
|
}
|
|
|
|
spin_lock_init(&c67x00->hpi.lock);
|
|
c67x00->hpi.regstep = pdata->hpi_regstep;
|
|
c67x00->pdata = dev_get_platdata(&pdev->dev);
|
|
c67x00->pdev = pdev;
|
|
|
|
c67x00_ll_init(c67x00);
|
|
c67x00_ll_hpi_reg_init(c67x00);
|
|
|
|
ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Cannot claim IRQ\n");
|
|
goto request_irq_failed;
|
|
}
|
|
|
|
ret = c67x00_ll_reset(c67x00);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Device reset failed\n");
|
|
goto reset_failed;
|
|
}
|
|
|
|
for (i = 0; i < C67X00_SIES; i++)
|
|
c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
|
|
|
|
platform_set_drvdata(pdev, c67x00);
|
|
|
|
return 0;
|
|
|
|
reset_failed:
|
|
free_irq(res2->start, c67x00);
|
|
request_irq_failed:
|
|
iounmap(c67x00->hpi.base);
|
|
map_failed:
|
|
release_mem_region(res->start, resource_size(res));
|
|
request_mem_failed:
|
|
kfree(c67x00);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int c67x00_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
int i;
|
|
|
|
for (i = 0; i < C67X00_SIES; i++)
|
|
c67x00_remove_sie(&c67x00->sie[i]);
|
|
|
|
c67x00_ll_release(c67x00);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (res)
|
|
free_irq(res->start, c67x00);
|
|
|
|
iounmap(c67x00->hpi.base);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res)
|
|
release_mem_region(res->start, resource_size(res));
|
|
|
|
kfree(c67x00);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver c67x00_driver = {
|
|
.probe = c67x00_drv_probe,
|
|
.remove = c67x00_drv_remove,
|
|
.driver = {
|
|
.name = "c67x00",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(c67x00_driver);
|
|
|
|
MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
|
|
MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:c67x00");
|