static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
{
struct at91_usbh_data *pdata = pdev->dev.platform_data;
int i;
if (pdata) {
for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
if (!gpio_is_valid(pdata->vbus_pin[i]))
continue;
gpio_request(pdata->vbus_pin[i], "ohci_vbus");
ohci_at91_usb_set_power(pdata, i, 1);
}
for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
int ret;
if (!gpio_is_valid(pdata->overcurrent_pin[i]))
continue;
gpio_request(pdata->overcurrent_pin[i], "ohci_overcurrent");
ret = request_irq(gpio_to_irq(pdata->overcurrent_pin[i]),
ohci_hcd_at91_overcurrent_irq,
IRQF_SHARED, "ohci_overcurrent", pdev);
if (ret) {
gpio_free(pdata->overcurrent_pin[i]);
dev_warn(& pdev->dev, "cannot get GPIO IRQ for overcurrent\n");
}
}
}
device_init_wakeup(&pdev->dev, 1);
return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
}
static int __devexit ohci_hcd_at91_drv_remove(struct platform_device *pdev)
{
struct at91_usbh_data *pdata = pdev->dev.platform_data;
int i;
if (pdata) {
at91_for_each_port(i) {
if (!gpio_is_valid(pdata->vbus_pin[i]))
continue;
ohci_at91_usb_set_power(pdata, i, 0);
gpio_free(pdata->vbus_pin[i]);
}
at91_for_each_port(i) {
if (!gpio_is_valid(pdata->overcurrent_pin[i]))
continue;
free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
gpio_free(pdata->overcurrent_pin[i]);
}
}
device_init_wakeup(&pdev->dev, 0);
usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
return 0;
}
static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
{
struct platform_device *pdev = data;
struct at91_usbh_data *pdata = pdev->dev.platform_data;
int val, gpio, port;
/* From the GPIO notifying the over-current situation, find
* out the corresponding port */
gpio = irq_to_gpio(irq);
for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
if (pdata->overcurrent_pin[port] == gpio)
break;
}
if (port == ARRAY_SIZE(pdata->overcurrent_pin)) {
dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
return IRQ_HANDLED;
}
val = gpio_get_value(gpio);
/* When notified of an over-current situation, disable power
on the corresponding port, and mark this port in
over-current. */
if (! val) {
ohci_at91_usb_set_power(pdata, port, 0);
pdata->overcurrent_status[port] = 1;
pdata->overcurrent_changed[port] = 1;
}
dev_dbg(& pdev->dev, "overcurrent situation %s\n",
val ? "exited" : "notified");
return IRQ_HANDLED;
}
static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
{
struct at91_usbh_data *pdata = pdev->dev.platform_data;
int i;
if (pdata) {
for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
if (pdata->vbus_pin[i] <= 0)
continue;
ohci_at91_usb_set_power(pdata, i, 0);
gpio_free(pdata->vbus_pin[i]);
}
for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
if (pdata->overcurrent_pin[i] <= 0)
continue;
free_irq(gpio_to_irq(pdata->overcurrent_pin[i]), pdev);
gpio_free(pdata->overcurrent_pin[i]);
}
}
device_init_wakeup(&pdev->dev, 0);
usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
return 0;
}
static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
{
struct platform_device *pdev = data;
struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev);
int val, gpio, port;
/* From the GPIO notifying the over-current situation, find
* out the corresponding port */
at91_for_each_port(port) {
if (gpio_is_valid(pdata->overcurrent_pin[port]) &&
gpio_to_irq(pdata->overcurrent_pin[port]) == irq) {
gpio = pdata->overcurrent_pin[port];
break;
}
}
if (port == AT91_MAX_USBH_PORTS) {
dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
return IRQ_HANDLED;
}
val = gpio_get_value(gpio);
/* When notified of an over-current situation, disable power
on the corresponding port, and mark this port in
over-current. */
if (!val) {
ohci_at91_usb_set_power(pdata, port, 0);
pdata->overcurrent_status[port] = 1;
pdata->overcurrent_changed[port] = 1;
}
dev_dbg(& pdev->dev, "overcurrent situation %s\n",
val ? "exited" : "notified");
return IRQ_HANDLED;
}
static int __devinit ohci_hcd_at91_drv_probe(struct platform_device *pdev)
{
struct at91_usbh_data *pdata;
int i;
int gpio;
int ret;
ret = ohci_at91_of_init(pdev);
if (ret)
return ret;
pdata = pdev->dev.platform_data;
if (pdata) {
at91_for_each_port(i) {
if (!gpio_is_valid(pdata->vbus_pin[i]))
continue;
gpio = pdata->vbus_pin[i];
ret = gpio_request(gpio, "ohci_vbus");
if (ret) {
dev_err(&pdev->dev,
"can't request vbus gpio %d\n", gpio);
continue;
}
ret = gpio_direction_output(gpio,
!pdata->vbus_pin_active_low[i]);
if (ret) {
dev_err(&pdev->dev,
"can't put vbus gpio %d as output %d\n",
gpio, !pdata->vbus_pin_active_low[i]);
gpio_free(gpio);
continue;
}
ohci_at91_usb_set_power(pdata, i, 1);
}
at91_for_each_port(i) {
if (!gpio_is_valid(pdata->overcurrent_pin[i]))
continue;
gpio = pdata->overcurrent_pin[i];
ret = gpio_request(gpio, "ohci_overcurrent");
if (ret) {
dev_err(&pdev->dev,
"can't request overcurrent gpio %d\n",
gpio);
continue;
}
ret = gpio_direction_input(gpio);
if (ret) {
dev_err(&pdev->dev,
"can't configure overcurrent gpio %d as input\n",
gpio);
gpio_free(gpio);
continue;
}
ret = request_irq(gpio_to_irq(gpio),
ohci_hcd_at91_overcurrent_irq,
IRQF_SHARED, "ohci_overcurrent", pdev);
if (ret) {
gpio_free(gpio);
dev_err(&pdev->dev,
"can't get gpio IRQ for overcurrent\n");
}
}
}
device_init_wakeup(&pdev->dev, 1);
return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
}
/*
* Look at the control requests to the root hub and see if we need to override.
*/
static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
struct usb_hub_descriptor *desc;
int ret = -EINVAL;
u32 *data = (u32 *)buf;
dev_dbg(hcd->self.controller,
"ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
hcd, typeReq, wValue, wIndex, buf, wLength);
wIndex--;
switch (typeReq) {
case SetPortFeature:
if (wValue == USB_PORT_FEAT_POWER) {
dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
if (valid_port(wIndex)) {
ohci_at91_usb_set_power(pdata, wIndex, 1);
ret = 0;
}
goto out;
}
break;
case ClearPortFeature:
switch (wValue) {
case USB_PORT_FEAT_C_OVER_CURRENT:
dev_dbg(hcd->self.controller,
"ClearPortFeature: C_OVER_CURRENT\n");
if (valid_port(wIndex)) {
pdata->overcurrent_changed[wIndex] = 0;
pdata->overcurrent_status[wIndex] = 0;
}
goto out;
case USB_PORT_FEAT_OVER_CURRENT:
dev_dbg(hcd->self.controller,
"ClearPortFeature: OVER_CURRENT\n");
if (valid_port(wIndex))
pdata->overcurrent_status[wIndex] = 0;
goto out;
case USB_PORT_FEAT_POWER:
dev_dbg(hcd->self.controller,
"ClearPortFeature: POWER\n");
if (valid_port(wIndex)) {
ohci_at91_usb_set_power(pdata, wIndex, 0);
return 0;
}
}
break;
}
ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
if (ret)
goto out;
switch (typeReq) {
case GetHubDescriptor:
/* update the hub's descriptor */
desc = (struct usb_hub_descriptor *)buf;
dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
desc->wHubCharacteristics);
/* remove the old configurations for power-switching, and
* over-current protection, and insert our new configuration
*/
desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
desc->wHubCharacteristics |= cpu_to_le16(0x0001);
if (pdata->overcurrent_supported) {
desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001);
}
dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
desc->wHubCharacteristics);
return ret;
case GetPortStatus:
/* check port status */
dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
if (valid_port(wIndex)) {
if (!ohci_at91_usb_get_power(pdata, wIndex))
*data &= ~cpu_to_le32(RH_PS_PPS);
if (pdata->overcurrent_changed[wIndex])
*data |= cpu_to_le32(RH_PS_OCIC);
if (pdata->overcurrent_status[wIndex])
*data |= cpu_to_le32(RH_PS_POCI);
}
}
out:
return ret;
}
