USB: Add support for designware UDC

index e449cd7..60347d7 100644
@@ -33,8 +33,8 @@
 #include <usb/musb_udc.h>
 #elif defined(CONFIG_CPU_PXA27X)
 #include <usb/pxa27x_udc.h>
-#elif defined(CONFIG_SPEAR3XX) || defined(CONFIG_SPEAR600)
-#include <usb/spr_udc.h>
+#elif defined(CONFIG_DW_UDC)
+#include <usb/designware_udc.h>
 #endif
 
 #include <version.h>

204 lines not on this page · raw message

index 55d19b5..5fef8cc 100644
@@ -28,14 +28,16 @@
  */
 
 /* USBD driver configuration */
-#define CONFIG_SPEARUDC
+#define CONFIG_DW_UDC
 #define CONFIG_USB_DEVICE
 #define CONFIG_USB_TTY
 
 #define CONFIG_USBD_PRODUCT_NAME		"SPEAr SoC"
 #define CONFIG_USBD_MANUFACTURER		"ST Microelectronics"
 
+#if defined(CONFIG_USB_TTY)
 #define CONFIG_EXTRA_ENV_USBTTY			"usbtty=cdc_acm\0"
+#endif
 
 /* I2C driver configuration */
 #define CONFIG_HARD_I2C

similarity index 98%
rename from include/usb/spr_udc.h
rename to include/usb/designware_udc.h
index 2c332d5..ae98e8c 100644
@@ -21,8 +21,8 @@
  * MA 02111-1307 USA
  */
 
-#ifndef __SPR_UDC_H
-#define __SPR_UDC_H
+#ifndef __DW_UDC_H
+#define __DW_UDC_H
 
 /*
  * Defines for  USBD

@@ -227,4 +227,4 @@ void udc_startup_events(struct usb_device_instance *device);
 void udc_setup_ep(struct usb_device_instance *device, unsigned int ep,
 		  struct usb_endpoint_instance *endpoint);
 
-#endif /* __SPR_UDC_H */
+#endif /* __DW_UDC_H */

index aee44aa..3c20f3d 100644
@@ -497,16 +497,24 @@ static void dw_udc_epn_tx(int ep)
 {
 	struct usb_endpoint_instance *endpoint = dw_find_ep(ep);
 
+	if (!endpoint)
+		return;
+
 	/*
 	 * We need to transmit a terminating zero-length packet now if
 	 * we have sent all of the data in this URB and the transfer
 	 * size was an exact multiple of the packet size.
 	 */
-	if (endpoint && endpoint->tx_urb && endpoint->tx_urb->actual_length) {
-		if (endpoint->last == endpoint->tx_packetSize) {
-			/* handle zero length packet here */
-			writel(0x0, &inep_regs_p[ep].write_done);
-		}
+	if (endpoint->tx_urb &&
+	    (endpoint->last == endpoint->tx_packetSize) &&
+	    (endpoint->tx_urb->actual_length - endpoint->sent -
+	     endpoint->last == 0)) {
+		/* handle zero length packet here */
+		writel(0x0, &inep_regs_p[ep].write_done);
+
+	}
+
+	if (endpoint->tx_urb && endpoint->tx_urb->actual_length) {
 		/* retire the data that was just sent */
 		usbd_tx_complete(endpoint);
 		/*

@@ -548,8 +556,6 @@ int udc_init(void)
 
 	readl(&plug_regs_p->plug_pending);
 
-	udc_disconnect();
-
 	for (i = 0; i < UDC_INIT_MDELAY; i++)
 		udelay(1000);
 

@@ -561,10 +567,9 @@ int udc_init(void)
 	writel(~0x0, &udc_regs_p->endp_int_mask);
 
 	writel(DEV_CONF_FS_SPEED | DEV_CONF_REMWAKEUP | DEV_CONF_SELFPOW |
-	       /* Dev_Conf_SYNCFRAME | */
 	       DEV_CONF_PHYINT_16, &udc_regs_p->dev_conf);
 
-	writel(0x0, &udc_regs_p->dev_cntl);
+	writel(DEV_CNTL_SOFTDISCONNECT, &udc_regs_p->dev_cntl);
 
 	/* Clear all interrupts pending */
 	writel(DEV_INT_MSK, &udc_regs_p->dev_int);

@@ -588,6 +593,9 @@ void udc_setup_ep(struct usb_device_instance *device,
 	char *tt;
 	u32 endp_intmask;
 
+	if ((ep != 0) && (udc_device->device_state < STATE_ADDRESSED))
+		return;
+
 	tt = getenv("usbtty");
 	if (!tt)
 		tt = "generic";

@@ -647,9 +655,6 @@ void udc_setup_ep(struct usb_device_instance *device,
 		writel(packet_size | ((buffer_size / sizeof(int)) << 16),
 		       &out_p->endp_maxpacksize);
 
-		writel((packet_size << 19) | ENDP_EPTYPE_CNTL,
-		       &udc_regs_p->udc_endp_reg[ep_num]);
-
 	} else if ((ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
 		/* Setup the IN endpoint */
 		writel(0x0, &in_p->endp_status);

@@ -708,7 +713,17 @@ void udc_setup_ep(struct usb_device_instance *device,
 /* Turn on the USB connection by enabling the pullup resistor */
 void udc_connect(void)
 {
-	u32 plug_st;
+	u32 plug_st, dev_cntl;
+
+	dev_cntl = readl(&udc_regs_p->dev_cntl);
+	dev_cntl |= DEV_CNTL_SOFTDISCONNECT;
+	writel(dev_cntl, &udc_regs_p->dev_cntl);
+
+	udelay(1000);
+
+	dev_cntl = readl(&udc_regs_p->dev_cntl);
+	dev_cntl &= ~DEV_CNTL_SOFTDISCONNECT;
+	writel(dev_cntl, &udc_regs_p->dev_cntl);
 
 	plug_st = readl(&plug_regs_p->plug_state);
 	plug_st &= ~(PLUG_STATUS_PHY_RESET | PLUG_STATUS_PHY_MODE);

@@ -720,6 +735,8 @@ void udc_disconnect(void)
 {
 	u32 plug_st;
 
+	writel(DEV_CNTL_SOFTDISCONNECT, &udc_regs_p->dev_cntl);
+
 	plug_st = readl(&plug_regs_p->plug_state);
 	plug_st |= (PLUG_STATUS_PHY_RESET | PLUG_STATUS_PHY_MODE);
 	writel(plug_st, &plug_regs_p->plug_state);

@@ -789,11 +806,6 @@ void dw_udc_plug_irq(void)
 		UDCDBG("device attached and powered");
 		udc_state_transition(udc_device->device_state, STATE_POWERED);
 	} else {
-		/*
-		 * USB cable detached
-		 * Reset the PHY and switch the mode.
-		 */
-		udc_disconnect();
 		writel(~0x0, &udc_regs_p->dev_int_mask);
 
 		UDCDBG("device detached or unpowered");

@@ -809,13 +821,18 @@ void dw_udc_dev_irq(void)
 	if (readl(&udc_regs_p->dev_int) & DEV_INT_USBRESET) {
 		writel(~0x0, &udc_regs_p->endp_int_mask);
 
-		udc_connect();
-
 		writel(readl(&inep_regs_p[0].endp_cntl) | ENDP_CNTL_FLUSH,
 		       &inep_regs_p[0].endp_cntl);
 
 		writel(DEV_INT_USBRESET, &udc_regs_p->dev_int);
 
+		/*
+		 * This endpoint0 specific register can be programmed only
+		 * after the phy clock is initialized
+		 */
+		writel((EP0_MAX_PACKET_SIZE << 19) | ENDP_EPTYPE_CNTL,
+				&udc_regs_p->udc_endp_reg[0]);
+
 		UDCDBG("device reset in progess");
 		udc_state_transition(udc_device->device_state, STATE_DEFAULT);
 	}

@@ -902,7 +919,7 @@ void dw_udc_endpoint_irq(void)
 		writel(ENDP0_INT_CTRLIN, &udc_regs_p->endp_int);
 	}
 
-	while (readl(&udc_regs_p->endp_int) & ENDP_INT_NONISOOUT_MSK) {
+	if (readl(&udc_regs_p->endp_int) & ENDP_INT_NONISOOUT_MSK) {
 		u32 epnum = 0;
 		u32 ep_int = readl(&udc_regs_p->endp_int) &
 		    ENDP_INT_NONISOOUT_MSK;

index 3c20f3d..205f54a 100644
@@ -566,8 +566,13 @@ int udc_init(void)
 	writel(~0x0, &udc_regs_p->dev_int_mask);
 	writel(~0x0, &udc_regs_p->endp_int_mask);
 
+#ifndef CONFIG_USBD_HS
 	writel(DEV_CONF_FS_SPEED | DEV_CONF_REMWAKEUP | DEV_CONF_SELFPOW |
 	       DEV_CONF_PHYINT_16, &udc_regs_p->dev_conf);
+#else
+	writel(DEV_CONF_HS_SPEED | DEV_CONF_REMWAKEUP | DEV_CONF_SELFPOW |
+			DEV_CONF_PHYINT_16, &udc_regs_p->dev_conf);
+#endif
 
 	writel(DEV_CNTL_SOFTDISCONNECT, &udc_regs_p->dev_cntl);
 

@@ -577,6 +582,11 @@ int udc_init(void)
 	return 0;
 }
 
+int is_usbd_high_speed(void)
+{
+	return (readl(&udc_regs_p->dev_stat) & DEV_STAT_ENUM) ? 0 : 1;
+}
+
 /*
  * udc_setup_ep - setup endpoint
  * Associate a physical endpoint with endpoint_instance

index ae98e8c..18b7c19 100644
@@ -197,6 +197,7 @@ struct udcfifo_regs {
 #define  UDC_INT_PACKET_SIZE		64
 #define  UDC_OUT_ENDPOINT		2
 #define  UDC_BULK_PACKET_SIZE		64
+#define  UDC_BULK_HS_PACKET_SIZE	512
 #define  UDC_IN_ENDPOINT		3
 #define  UDC_OUT_PACKET_SIZE		64
 #define  UDC_IN_PACKET_SIZE		64

index 205f54a..67cdb29 100644
@@ -802,7 +802,7 @@ void udc_startup_events(struct usb_device_instance *device)
 /*
  * Plug detection interrupt handling
  */
-void dw_udc_plug_irq(void)
+static void dw_udc_plug_irq(void)
 {
 	if (readl(&plug_regs_p->plug_state) & PLUG_STATUS_ATTACHED) {
 		/*

@@ -826,7 +826,7 @@ void dw_udc_plug_irq(void)
 /*
  * Device interrupt handling
  */
-void dw_udc_dev_irq(void)
+static void dw_udc_dev_irq(void)
 {
 	if (readl(&udc_regs_p->dev_int) & DEV_INT_USBRESET) {
 		writel(~0x0, &udc_regs_p->endp_int_mask);

@@ -896,7 +896,7 @@ void dw_udc_dev_irq(void)
 /*
  * Endpoint interrupt handling
  */
-void dw_udc_endpoint_irq(void)
+static void dw_udc_endpoint_irq(void)
 {
 	while (readl(&udc_regs_p->endp_int) & ENDP0_INT_CTRLOUT) {
 

index 67cdb29..7e9ccde 100644
@@ -202,6 +202,7 @@ static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
 	u32 i, nw, nb;
 	u32 *wrdp;
 	u8 *bytp;
+	u32 tmp[128];
 
 	if (readl(&udc_regs_p->dev_stat) & DEV_STAT_RXFIFO_EMPTY)
 		return -1;

@@ -209,7 +210,12 @@ static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
 	nw = len / sizeof(u32);
 	nb = len % sizeof(u32);
 
-	wrdp = (u32 *)bufp;
+	/* use tmp buf if bufp is not word aligned */
+	if ((int)bufp & 0x3)
+		wrdp = (u32 *)&tmp[0];
+	else
+		wrdp = (u32 *)bufp;
+
 	for (i = 0; i < nw; i++) {
 		writel(readl(fifo_ptr), wrdp);
 		wrdp++;

@@ -223,6 +229,10 @@ static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
 	}
 	readl(&outep_regs_p[epNum].write_done);
 
+	/* copy back tmp buffer to bufp if bufp is not word aligned */
+	if ((int)bufp & 0x3)
+		memcpy(bufp, tmp, len);
+
 	return 0;
 }