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USB: ohci-at91: change maximum number of ports
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Change number of ports to 3 for newer SoCs. Modify pdata structure
and ohci-at91 code that was dealing with ports information and check
of port indexes.
Several coding style errors have been addresses as the patch was touching
affected lines of code and was producing errors while run through
checkpatch.pl.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
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Nicolas Ferre committed Apr 4, 2012
1 parent aaf9f5f commit 0ee6d1e
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Showing 2 changed files with 43 additions and 36 deletions.
13 changes: 7 additions & 6 deletions arch/arm/mach-at91/include/mach/board.h
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Original file line number Diff line number Diff line change
Expand Up @@ -86,14 +86,15 @@ extern void __init at91_add_device_mci(short mmc_id, struct mci_platform_data *d
extern void __init at91_add_device_eth(struct macb_platform_data *data);

/* USB Host */
#define AT91_MAX_USBH_PORTS 3
struct at91_usbh_data {
u8 ports; /* number of ports on root hub */
int vbus_pin[2]; /* port power-control pin */
u8 vbus_pin_active_low[2];
int vbus_pin[AT91_MAX_USBH_PORTS]; /* port power-control pin */
int overcurrent_pin[AT91_MAX_USBH_PORTS];
u8 ports; /* number of ports on root hub */
u8 overcurrent_supported;
int overcurrent_pin[2];
u8 overcurrent_status[2];
u8 overcurrent_changed[2];
u8 vbus_pin_active_low[AT91_MAX_USBH_PORTS];
u8 overcurrent_status[AT91_MAX_USBH_PORTS];
u8 overcurrent_changed[AT91_MAX_USBH_PORTS];
};
extern void __init at91_add_device_usbh(struct at91_usbh_data *data);
extern void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data);
Expand Down
66 changes: 36 additions & 30 deletions drivers/usb/host/ohci-at91.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,10 @@
#error "CONFIG_ARCH_AT91 must be defined."
#endif

#define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS)
#define at91_for_each_port(index) \
for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++)

/* interface and function clocks; sometimes also an AHB clock */
static struct clk *iclk, *fclk, *hclk;
static int clocked;
Expand Down Expand Up @@ -240,7 +244,7 @@ ohci_at91_start (struct usb_hcd *hcd)

static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
{
if (port < 0 || port >= 2)
if (!valid_port(port))
return;

if (!gpio_is_valid(pdata->vbus_pin[port]))
Expand All @@ -252,7 +256,7 @@ static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int

static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
{
if (port < 0 || port >= 2)
if (!valid_port(port))
return -EINVAL;

if (!gpio_is_valid(pdata->vbus_pin[port]))
Expand All @@ -271,9 +275,9 @@ static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
int length = ohci_hub_status_data(hcd, buf);
int port;

for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
at91_for_each_port(port) {
if (pdata->overcurrent_changed[port]) {
if (! length)
if (!length)
length = 1;
buf[0] |= 1 << (port + 1);
}
Expand All @@ -297,11 +301,17 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
"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");
ohci_at91_usb_set_power(pdata, wIndex - 1, 1);
if (valid_port(wIndex)) {
ohci_at91_usb_set_power(pdata, wIndex, 1);
ret = 0;
}

goto out;
}
break;
Expand All @@ -312,9 +322,9 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
dev_dbg(hcd->self.controller,
"ClearPortFeature: C_OVER_CURRENT\n");

if (wIndex == 1 || wIndex == 2) {
pdata->overcurrent_changed[wIndex-1] = 0;
pdata->overcurrent_status[wIndex-1] = 0;
if (valid_port(wIndex)) {
pdata->overcurrent_changed[wIndex] = 0;
pdata->overcurrent_status[wIndex] = 0;
}

goto out;
Expand All @@ -323,25 +333,24 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
dev_dbg(hcd->self.controller,
"ClearPortFeature: OVER_CURRENT\n");

if (wIndex == 1 || wIndex == 2) {
pdata->overcurrent_status[wIndex-1] = 0;
}
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 (wIndex == 1 || wIndex == 2) {
ohci_at91_usb_set_power(pdata, wIndex - 1, 0);
if (valid_port(wIndex)) {
ohci_at91_usb_set_power(pdata, wIndex, 0);
return 0;
}
}
break;
}

ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
if (ret)
goto out;

Expand Down Expand Up @@ -377,18 +386,15 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,

dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);

if (wIndex == 1 || wIndex == 2) {
if (! ohci_at91_usb_get_power(pdata, wIndex-1)) {
if (valid_port(wIndex)) {
if (!ohci_at91_usb_get_power(pdata, wIndex))
*data &= ~cpu_to_le32(RH_PS_PPS);
}

if (pdata->overcurrent_changed[wIndex-1]) {
if (pdata->overcurrent_changed[wIndex])
*data |= cpu_to_le32(RH_PS_OCIC);
}

if (pdata->overcurrent_status[wIndex-1]) {
if (pdata->overcurrent_status[wIndex])
*data |= cpu_to_le32(RH_PS_POCI);
}
}
}

Expand Down Expand Up @@ -450,14 +456,14 @@ static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)

/* From the GPIO notifying the over-current situation, find
* out the corresponding port */
for (port = 0; port < ARRAY_SIZE(pdata->overcurrent_pin); port++) {
at91_for_each_port(port) {
if (gpio_to_irq(pdata->overcurrent_pin[port]) == irq) {
gpio = pdata->overcurrent_pin[port];
break;
}
}

if (port == ARRAY_SIZE(pdata->overcurrent_pin)) {
if (port == AT91_MAX_USBH_PORTS) {
dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
return IRQ_HANDLED;
}
Expand All @@ -467,7 +473,7 @@ static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
/* When notified of an over-current situation, disable power
on the corresponding port, and mark this port in
over-current. */
if (! val) {
if (!val) {
ohci_at91_usb_set_power(pdata, port, 0);
pdata->overcurrent_status[port] = 1;
pdata->overcurrent_changed[port] = 1;
Expand Down Expand Up @@ -514,15 +520,15 @@ static int __devinit ohci_at91_of_init(struct platform_device *pdev)
if (!of_property_read_u32(np, "num-ports", &ports))
pdata->ports = ports;

for (i = 0; i < 2; i++) {
at91_for_each_port(i) {
gpio = of_get_named_gpio_flags(np, "atmel,vbus-gpio", i, &flags);
pdata->vbus_pin[i] = gpio;
if (!gpio_is_valid(gpio))
continue;
pdata->vbus_pin_active_low[i] = flags & OF_GPIO_ACTIVE_LOW;
}

for (i = 0; i < 2; i++)
at91_for_each_port(i)
pdata->overcurrent_pin[i] =
of_get_named_gpio_flags(np, "atmel,oc-gpio", i, &flags);

Expand Down Expand Up @@ -554,7 +560,7 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
pdata = pdev->dev.platform_data;

if (pdata) {
for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
at91_for_each_port(i) {
if (!gpio_is_valid(pdata->vbus_pin[i]))
continue;
gpio = pdata->vbus_pin[i];
Expand All @@ -578,7 +584,7 @@ static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
ohci_at91_usb_set_power(pdata, i, 1);
}

for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_pin); i++) {
at91_for_each_port(i) {
if (!gpio_is_valid(pdata->overcurrent_pin[i]))
continue;
gpio = pdata->overcurrent_pin[i];
Expand Down Expand Up @@ -621,14 +627,14 @@ static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
int i;

if (pdata) {
for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
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]);
}

for (i = 0; i < ARRAY_SIZE(pdata->overcurrent_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);
Expand Down

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