atmel_usba_udc: move endpoint declarations into platform data.

The atmel_usba_udc driver is being used by several platforms and arches
(avr32 and at91 ATM), and each platform may have different endpoint
settings.

The patch below moves the endpoint declarations into the platform
data and make the necessary adjustments for AVR32 (improved by
Haavard Skinnemoen <hskinnemoen@atmel.com>).

Signed-off-by: Stelian Pop <stelian@popies.net>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

arch/avr32/mach-at32ap/at32ap700x.c

@@ -11,6 +11,7 @@
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/spi/spi.h>
+#include <linux/usb/atmel_usba_udc.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -1351,9 +1352,39 @@ static struct clk usba0_hclk = {
 	.index		= 6,
 };
 
+#define EP(nam, idx, maxpkt, maxbk, dma, isoc)			\
+	[idx] = {						\
+		.name		= nam,				\
+		.index		= idx,				\
+		.fifo_size	= maxpkt,			\
+		.nr_banks	= maxbk,			\
+		.can_dma	= dma,				\
+		.can_isoc	= isoc,				\
+	}
+
+static struct usba_ep_data at32_usba_ep[] __initdata = {
+	EP("ep0",     0,   64, 1, 0, 0),
+	EP("ep1",     1,  512, 2, 1, 1),
+	EP("ep2",     2,  512, 2, 1, 1),
+	EP("ep3-int", 3,   64, 3, 1, 0),
+	EP("ep4-int", 4,   64, 3, 1, 0),
+	EP("ep5",     5, 1024, 3, 1, 1),
+	EP("ep6",     6, 1024, 3, 1, 1),
+};
+
+#undef EP
+
 struct platform_device *__init
 at32_add_device_usba(unsigned int id, struct usba_platform_data *data)
 {
+	/*
+	 * pdata doesn't have room for any endpoints, so we need to
+	 * append room for the ones we need right after it.
+	 */
+	struct {
+		struct usba_platform_data pdata;
+		struct usba_ep_data ep[7];
+	} usba_data;
 	struct platform_device *pdev;
 
 	if (id != 0)
@@ -1367,13 +1398,20 @@ at32_add_device_usba(unsigned int id, struct usba_platform_data *data)
 					  ARRAY_SIZE(usba0_resource)))
 		goto out_free_pdev;
 
-	if (data) {
-		if (platform_device_add_data(pdev, data, sizeof(*data)))
-			goto out_free_pdev;
+	if (data)
+		usba_data.pdata.vbus_pin = data->vbus_pin;
+	else
+		usba_data.pdata.vbus_pin = -EINVAL;
 
-		if (data->vbus_pin != GPIO_PIN_NONE)
-			at32_select_gpio(data->vbus_pin, 0);
-	}
+	data = &usba_data.pdata;
+	data->num_ep = ARRAY_SIZE(at32_usba_ep);
+	memcpy(data->ep, at32_usba_ep, sizeof(at32_usba_ep));
+
+	if (platform_device_add_data(pdev, data, sizeof(usba_data)))
+		goto out_free_pdev;
+
+	if (data->vbus_pin >= 0)
+		at32_select_gpio(data->vbus_pin, 0);
 
 	usba0_pclk.dev = &pdev->dev;
 	usba0_hclk.dev = &pdev->dev;

drivers/usb/gadget/atmel_usba_udc.c

@@ -18,6 +18,7 @@
 #include <linux/platform_device.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/usb/atmel_usba_udc.h>
 #include <linux/delay.h>
 
 #include <asm/gpio.h>
@@ -27,6 +28,7 @@
 
 
 static struct usba_udc the_udc;
+static struct usba_ep *usba_ep;
 
 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 #include <linux/debugfs.h>
@@ -982,33 +984,6 @@ static const struct usb_gadget_ops usba_udc_ops = {
 	.set_selfpowered	= usba_udc_set_selfpowered,
 };
 
-#define EP(nam, idx, maxpkt, maxbk, dma, isoc)			\
-{								\
-	.ep	= {						\
-		.ops		= &usba_ep_ops,			\
-		.name		= nam,				\
-		.maxpacket	= maxpkt,			\
-	},							\
-	.udc		= &the_udc,				\
-	.queue		= LIST_HEAD_INIT(usba_ep[idx].queue),	\
-	.fifo_size	= maxpkt,				\
-	.nr_banks	= maxbk,				\
-	.index		= idx,					\
-	.can_dma	= dma,					\
-	.can_isoc	= isoc,					\
-}
-
-static struct usba_ep usba_ep[] = {
-	EP("ep0",     0,   64, 1, 0, 0),
-	EP("ep1",     1,  512, 2, 1, 1),
-	EP("ep2",     2,  512, 2, 1, 1),
-	EP("ep3-int", 3,   64, 3, 1, 0),
-	EP("ep4-int", 4,   64, 3, 1, 0),
-	EP("ep5",     5, 1024, 3, 1, 1),
-	EP("ep6",     6, 1024, 3, 1, 1),
-};
-#undef EP
-
 static struct usb_endpoint_descriptor usba_ep0_desc = {
 	.bLength = USB_DT_ENDPOINT_SIZE,
 	.bDescriptorType = USB_DT_ENDPOINT,
@@ -1027,7 +1002,6 @@ static void nop_release(struct device *dev)
 static struct usba_udc the_udc = {
 	.gadget	= {
 		.ops		= &usba_udc_ops,
-		.ep0		= &usba_ep[0].ep,
 		.ep_list	= LIST_HEAD_INIT(the_udc.gadget.ep_list),
 		.is_dualspeed	= 1,
 		.name		= "atmel_usba_udc",
@@ -1861,7 +1835,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
 	fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
-	if (!regs || !fifo)
+	if (!regs || !fifo || !pdata)
 		return -ENXIO;
 
 	irq = platform_get_irq(pdev, 0);
@@ -1909,16 +1883,44 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 	usba_writel(udc, CTRL, 0);
 	clk_disable(pclk);
 
+	usba_ep = kmalloc(sizeof(struct usba_ep) * pdata->num_ep,
+			  GFP_KERNEL);
+	if (!usba_ep)
+		goto err_alloc_ep;
+
+	the_udc.gadget.ep0 = &usba_ep[0].ep;
+
 	INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
 	usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
 	usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
 	usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
-	for (i = 1; i < ARRAY_SIZE(usba_ep); i++) {
+	usba_ep[0].ep.ops = &usba_ep_ops;
+	usba_ep[0].ep.name = pdata->ep[0].name;
+	usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
+	usba_ep[0].udc = &the_udc;
+	INIT_LIST_HEAD(&usba_ep[0].queue);
+	usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
+	usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
+	usba_ep[0].index = pdata->ep[0].index;
+	usba_ep[0].can_dma = pdata->ep[0].can_dma;
+	usba_ep[0].can_isoc = pdata->ep[0].can_isoc;
+
+	for (i = 1; i < pdata->num_ep; i++) {
 		struct usba_ep *ep = &usba_ep[i];
 
 		ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
 		ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
 		ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
+		ep->ep.ops = &usba_ep_ops;
+		ep->ep.name = pdata->ep[i].name;
+		ep->ep.maxpacket = pdata->ep[i].fifo_size;
+		ep->udc = &the_udc;
+		INIT_LIST_HEAD(&ep->queue);
+		ep->fifo_size = pdata->ep[i].fifo_size;
+		ep->nr_banks = pdata->ep[i].nr_banks;
+		ep->index = pdata->ep[i].index;
+		ep->can_dma = pdata->ep[i].can_dma;
+		ep->can_isoc = pdata->ep[i].can_isoc;
 
 		list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
 	}
@@ -1937,7 +1939,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 		goto err_device_add;
 	}
 
-	if (pdata && pdata->vbus_pin >= 0) {
+	if (pdata->vbus_pin >= 0) {
 		if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
 			udc->vbus_pin = pdata->vbus_pin;
 
@@ -1957,7 +1959,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 	}
 
 	usba_init_debugfs(udc);
-	for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
+	for (i = 1; i < pdata->num_ep; i++)
 		usba_ep_init_debugfs(udc, &usba_ep[i]);
 
 	return 0;
@@ -1965,6 +1967,8 @@ static int __init usba_udc_probe(struct platform_device *pdev)
 err_device_add:
 	free_irq(irq, udc);
 err_request_irq:
+	kfree(usba_ep);
+err_alloc_ep:
 	iounmap(udc->fifo);
 err_map_fifo:
 	iounmap(udc->regs);
@@ -1982,10 +1986,11 @@ static int __exit usba_udc_remove(struct platform_device *pdev)
 {
 	struct usba_udc *udc;
 	int i;
+	struct usba_platform_data *pdata = pdev->dev.platform_data;
 
 	udc = platform_get_drvdata(pdev);
 
-	for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
+	for (i = 1; i < pdata->num_ep; i++)
 		usba_ep_cleanup_debugfs(&usba_ep[i]);
 	usba_cleanup_debugfs(udc);
 

include/asm-avr32/arch-at32ap/board.h

@@ -38,9 +38,7 @@ struct platform_device *
 at32_add_device_lcdc(unsigned int id, struct atmel_lcdfb_info *data,
 		     unsigned long fbmem_start, unsigned long fbmem_len);
 
-struct usba_platform_data {
-	int vbus_pin;
-};
+struct usba_platform_data;
 struct platform_device *
 at32_add_device_usba(unsigned int id, struct usba_platform_data *data);
 

include/linux/usb/atmel_usba_udc.h

@@ -0,0 +1,22 @@
+/*
+ * Platform data definitions for Atmel USBA gadget driver.
+ */
+#ifndef __LINUX_USB_USBA_H
+#define __LINUX_USB_USBA_H
+
+struct usba_ep_data {
+	char	*name;
+	int	index;
+	int	fifo_size;
+	int	nr_banks;
+	int	can_dma;
+	int	can_isoc;
+};
+
+struct usba_platform_data {
+	int			vbus_pin;
+	int			num_ep;
+	struct usba_ep_data	ep[0];
+};
+
+#endif /* __LINUX_USB_USBA_H */