X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=drivers%2Fusb%2Fgadget%2Fs3c-hsotg.c;h=26193eceb3231d48c06e98b29a09cf9849b319f5;hb=c67dda14389205f0a223c5089307495290939b3b;hp=1f73b485732d1b74028064e37193ce6f56021718;hpb=8d0bc2b456103a34c11e01305cd1aed1cde579e5;p=cascardo%2Flinux.git

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 1f73b485732d..26193eceb323 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -297,6 +297,12 @@ static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg,
  */
 static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg)
 {
+	unsigned int ep;
+	unsigned int addr;
+	unsigned int size;
+	int timeout;
+	u32 val;
+
 	/* the ryu 2.6.24 release ahs
 	   writel(0x1C0, hsotg->regs + S3C_GRXFSIZ);
 	   writel(S3C_GNPTXFSIZ_NPTxFStAddr(0x200) |
@@ -310,6 +316,51 @@ static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg)
 	writel(S3C_GNPTXFSIZ_NPTxFStAddr(2048) |
 	       S3C_GNPTXFSIZ_NPTxFDep(0x1C0),
 	       hsotg->regs + S3C_GNPTXFSIZ);
+
+	/* arange all the rest of the TX FIFOs, as some versions of this
+	 * block have overlapping default addresses. This also ensures
+	 * that if the settings have been changed, then they are set to
+	 * known values. */
+
+	/* start at the end of the GNPTXFSIZ, rounded up */
+	addr = 2048 + 1024;
+	size = 768;
+
+	/* currently we allocate TX FIFOs for all possible endpoints,
+	 * and assume that they are all the same size. */
+
+	for (ep = 0; ep <= 15; ep++) {
+		val = addr;
+		val |= size << S3C_DPTXFSIZn_DPTxFSize_SHIFT;
+		addr += size;
+
+		writel(val, hsotg->regs + S3C_DPTXFSIZn(ep));
+	}
+
+	/* according to p428 of the design guide, we need to ensure that
+	 * all fifos are flushed before continuing */
+
+	writel(S3C_GRSTCTL_TxFNum(0x10) | S3C_GRSTCTL_TxFFlsh |
+	       S3C_GRSTCTL_RxFFlsh, hsotg->regs + S3C_GRSTCTL);
+
+	/* wait until the fifos are both flushed */
+	timeout = 100;
+	while (1) {
+		val = readl(hsotg->regs + S3C_GRSTCTL);
+
+		if ((val & (S3C_GRSTCTL_TxFFlsh | S3C_GRSTCTL_RxFFlsh)) == 0)
+			break;
+
+		if (--timeout == 0) {
+			dev_err(hsotg->dev,
+				"%s: timeout flushing fifos (GRSTCTL=%08x)\n",
+				__func__, val);
+		}
+
+		udelay(1);
+	}
+
+	dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout);
 }
 
 /**
@@ -2574,6 +2625,9 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK,
 	       hsotg->regs + S3C_DCTL);
 
+	/* must be at-least 3ms to allow bus to see disconnect */
+	msleep(3);
+
 	/* remove the soft-disconnect and let's go */
 	__bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
 
@@ -2730,6 +2784,9 @@ static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
 
 	writel(0, hsotg->regs + S3C_DAINTMSK);
 
+	/* Be in disconnected state until gadget is registered */
+	__orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
+
 	if (0) {
 		/* post global nak until we're ready */
 		writel(S3C_DCTL_SGNPInNAK | S3C_DCTL_SGOUTNak,