1 files changed, 31 insertions, 13 deletions

diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index db5f4f5c7a10..e209b3b709d6 100644
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/drivers/usb/host/isp1760-hcd.c
@@ -126,9 +126,8 @@ static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
  * doesn't quite work because some people have to enforce 32-bit access
  */
 static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
-                __u32 __iomem *dst, u32 offset, u32 len)
+                __u32 __iomem *dst, u32 len)
 {
-        struct usb_hcd *hcd = priv_to_hcd(priv);
         u32 val;
         u8 *buff8;
 
@@ -136,11 +135,6 @@ static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
                 printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
                 return;
         }
-        isp1760_writel(offset,  hcd->regs + HC_MEMORY_REG);
-        /* XXX
-         * 90nsec delay, the spec says something how this could be avoided.
-         */
-        mdelay(1);
 
         while (len >= 4) {
                 *src = __raw_readl(dst);
@@ -987,8 +981,20 @@ static void do_atl_int(struct usb_hcd *usb_hcd)
                         printk(KERN_ERR "qh is 0\n");
                         continue;
                 }
-                priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs,
-                                atl_regs, sizeof(ptd));
+                isp1760_writel(atl_regs + ISP_BANK(0), usb_hcd->regs +
+                                HC_MEMORY_REG);
+                isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
+                                HC_MEMORY_REG);
+                /*
+                 * write bank1 address twice to ensure the 90ns delay (time
+                 * between BANK0 write and the priv_read_copy() call is at
+                 * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
+                 */
+                isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
+                                HC_MEMORY_REG);
+
+                priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs +
+                                ISP_BANK(0), sizeof(ptd));
 
                 dw1 = le32_to_cpu(ptd.dw1);
                 dw2 = le32_to_cpu(ptd.dw2);
@@ -1091,7 +1097,7 @@ static void do_atl_int(struct usb_hcd *usb_hcd)
                         case IN_PID:
                                 priv_read_copy(priv,
                                         priv->atl_ints[queue_entry].data_buffer,
-                                        usb_hcd->regs + payload, payload,
+                                        usb_hcd->regs + payload + ISP_BANK(1),
                                         length);
 
                         case OUT_PID:
@@ -1206,8 +1212,20 @@ static void do_intl_int(struct usb_hcd *usb_hcd)
                         continue;
                 }
 
-                priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs,
-                                int_regs, sizeof(ptd));
+                isp1760_writel(int_regs + ISP_BANK(0), usb_hcd->regs +
+                                HC_MEMORY_REG);
+                isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
+                                HC_MEMORY_REG);
+                /*
+                 * write bank1 address twice to ensure the 90ns delay (time
+                 * between BANK0 write and the priv_read_copy() call is at
+                 * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
+                 */
+                isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
+                                HC_MEMORY_REG);
+
+                priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs +
+                                ISP_BANK(0), sizeof(ptd));
                 dw1 = le32_to_cpu(ptd.dw1);
                 dw3 = le32_to_cpu(ptd.dw3);
                 check_int_err_status(le32_to_cpu(ptd.dw4));
@@ -1242,7 +1260,7 @@ static void do_intl_int(struct usb_hcd *usb_hcd)
                         case IN_PID:
                                 priv_read_copy(priv,
                                         priv->int_ints[queue_entry].data_buffer,
-                                        usb_hcd->regs + payload , payload,
+                                        usb_hcd->regs + payload + ISP_BANK(1),
                                         length);
                         case OUT_PID: