USB: ohci-at91: change maximum number of ports

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>

1 files changed, 36 insertions, 30 deletions

diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index c30da6ab9f9..7cf4797a601 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -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;
@@ -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]))
@@ -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]))
@@ -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);
 		}
@@ -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;
@@ -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;
@@ -323,9 +333,8 @@ 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;
 
@@ -333,15 +342,15 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			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;
 
@@ -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);
-			}
 		}
 	}
 
@@ -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;
 	}
@@ -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;
@@ -514,7 +520,7 @@ 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))
@@ -522,7 +528,7 @@ static int __devinit ohci_at91_of_init(struct platform_device *pdev)
 		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);
 
@@ -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];
@@ -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];
@@ -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);