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authorLars-Peter Clausen <lars@metafoo.de>2011-03-07 08:41:59 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-07 12:23:22 -0800
commita74022a55e44fe2044ac3660452cafecb300aece (patch)
treeebff5a97a61c4e5762a042a515459469993ed7e1 /drivers/usb/gadget/s3c2410_udc.c
parent09173b589d547c002b6a2b560e150c4d7bb56c99 (diff)
downloadop-kernel-dev-a74022a55e44fe2044ac3660452cafecb300aece.zip
op-kernel-dev-a74022a55e44fe2044ac3660452cafecb300aece.tar.gz
USB: s3c2410_udc: Add common implementation for GPIO controlled pullups
Currently all boards using the s3c2410_udc driver use a GPIO to control the state of the pullup, as a result the same code is reimplemented in each board file. This patch adds support for using a GPIO to control the pullup state to the udc driver, so the boards can use a common implementation. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget/s3c2410_udc.c')
-rw-r--r--drivers/usb/gadget/s3c2410_udc.c60
1 files changed, 51 insertions, 9 deletions
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 2b02520..6d8b040 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1481,7 +1481,9 @@ static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
{
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
- if (udc_info && udc_info->udc_command) {
+ if (udc_info && (udc_info->udc_command ||
+ gpio_is_valid(udc_info->pullup_pin))) {
+
if (is_on)
s3c2410_udc_enable(udc);
else {
@@ -1558,6 +1560,32 @@ static const struct usb_gadget_ops s3c2410_ops = {
.vbus_draw = s3c2410_vbus_draw,
};
+static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
+{
+ if (!udc_info)
+ return;
+
+ if (udc_info->udc_command) {
+ udc_info->udc_command(S3C2410_UDC_P_DISABLE);
+ } else if (gpio_is_valid(udc_info->pullup_pin)) {
+ int value;
+
+ switch (cmd) {
+ case S3C2410_UDC_P_ENABLE:
+ value = 1;
+ break;
+ case S3C2410_UDC_P_DISABLE:
+ value = 0;
+ break;
+ default:
+ return;
+ }
+ value ^= udc_info->pullup_pin_inverted;
+
+ gpio_set_value(udc_info->pullup_pin, value);
+ }
+}
+
/*------------------------- gadget driver handling---------------------------*/
/*
* s3c2410_udc_disable
@@ -1579,8 +1607,7 @@ static void s3c2410_udc_disable(struct s3c2410_udc *dev)
udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
/* Good bye, cruel world */
- if (udc_info && udc_info->udc_command)
- udc_info->udc_command(S3C2410_UDC_P_DISABLE);
+ s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
/* Set speed to unknown */
dev->gadget.speed = USB_SPEED_UNKNOWN;
@@ -1641,8 +1668,7 @@ static void s3c2410_udc_enable(struct s3c2410_udc *dev)
udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
/* time to say "hello, world" */
- if (udc_info && udc_info->udc_command)
- udc_info->udc_command(S3C2410_UDC_P_ENABLE);
+ s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
}
/*
@@ -1917,6 +1943,17 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
udc->vbus = 1;
}
+ if (udc_info && !udc_info->udc_command &&
+ gpio_is_valid(udc_info->pullup_pin)) {
+
+ retval = gpio_request_one(udc_info->pullup_pin,
+ udc_info->vbus_pin_inverted ?
+ GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
+ "udc pullup");
+ if (retval)
+ goto err_vbus_irq;
+ }
+
if (s3c2410_udc_debugfs_root) {
udc->regs_info = debugfs_create_file("registers", S_IRUGO,
s3c2410_udc_debugfs_root,
@@ -1929,6 +1966,9 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
return 0;
+err_vbus_irq:
+ if (udc_info && udc_info->vbus_pin > 0)
+ free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
err_gpio_claim:
if (udc_info && udc_info->vbus_pin > 0)
gpio_free(udc_info->vbus_pin);
@@ -1956,6 +1996,10 @@ static int s3c2410_udc_remove(struct platform_device *pdev)
debugfs_remove(udc->regs_info);
+ if (udc_info && !udc_info->udc_command &&
+ gpio_is_valid(udc_info->pullup_pin))
+ gpio_free(udc_info->pullup_pin);
+
if (udc_info && udc_info->vbus_pin > 0) {
irq = gpio_to_irq(udc_info->vbus_pin);
free_irq(irq, udc);
@@ -1987,16 +2031,14 @@ static int s3c2410_udc_remove(struct platform_device *pdev)
#ifdef CONFIG_PM
static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
{
- if (udc_info && udc_info->udc_command)
- udc_info->udc_command(S3C2410_UDC_P_DISABLE);
+ s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
return 0;
}
static int s3c2410_udc_resume(struct platform_device *pdev)
{
- if (udc_info && udc_info->udc_command)
- udc_info->udc_command(S3C2410_UDC_P_ENABLE);
+ s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
return 0;
}
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