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authorMichael Trimarchi <trimarchi@gandalf.sssup.it>2008-12-31 10:33:22 +0100
committerRemy Bohmer <linux@bohmer.net>2009-01-28 19:57:29 +0100
commit1ed9f9adc88218841dfeb60b9094a5a548bff009 (patch)
tree9e029ac139baf6aa4dfd5dc641aa45db10d065bc /drivers/usb
parent8fea2914ac974029b65926ef8247d908f84d202d (diff)
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USB ehci remove infinite loop and use handshake function
USB ehci code cleanup. Use handshake instead of infinite while loop to check the STD_ASS status Signed-off-by: Michael Trimarchi <trimarchimichael@yahoo.it> Signed-off-by: Remy Bohmer <linux@bohmer.net>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/usb_ehci_core.c49
1 files changed, 25 insertions, 24 deletions
diff --git a/drivers/usb/usb_ehci_core.c b/drivers/usb/usb_ehci_core.c
index 07e9a6b..9736707 100644
--- a/drivers/usb/usb_ehci_core.c
+++ b/drivers/usb/usb_ehci_core.c
@@ -28,7 +28,7 @@
#include "usb_ehci.h"
int rootdev;
-struct ehci_hccr *hccr; /* R/O registers, not need for volatile */
+struct ehci_hccr *hccr; /* R/O registers, not need for volatile */
volatile struct ehci_hcor *hcor;
static uint16_t portreset;
@@ -106,20 +106,19 @@ static struct descriptor {
#define ehci_is_TDI() (0)
#endif
-static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int msec)
+static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
{
uint32_t result;
do {
result = ehci_readl(ptr);
- debug("handshake read reg(%x)=%x\n", (uint32_t)ptr, result);
if (result == ~(uint32_t)0)
return -1;
result &= mask;
if (result == done)
return 0;
- wait_ms(1);
- msec--;
- } while (msec > 0);
+ udelay(1);
+ usec--;
+ } while (usec > 0);
return -1;
}
@@ -138,21 +137,21 @@ static int ehci_reset(void)
cmd = ehci_readl(&hcor->or_usbcmd);
cmd |= CMD_RESET;
ehci_writel(&hcor->or_usbcmd, cmd);
- ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250);
+ ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
if (ret < 0) {
printf("EHCI fail to reset\n");
goto out;
}
-#if defined(CONFIG_EHCI_IS_TDI)
- reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
- tmp = ehci_readl(reg_ptr);
- tmp |= USBMODE_CM_HC;
+ if (ehci_is_TDI()) {
+ reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
+ tmp = ehci_readl(reg_ptr);
+ tmp |= USBMODE_CM_HC;
#if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
- tmp |= USBMODE_BE;
-#endif
- ehci_writel(reg_ptr, tmp);
+ tmp |= USBMODE_BE;
#endif
+ ehci_writel(reg_ptr, tmp);
+ }
out:
return ret;
}
@@ -224,7 +223,7 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
uint32_t endpt, token, usbsts;
uint32_t c, toggle;
uint32_t cmd;
- uint32_t sts;
+ int ret = 0;
debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe,
buffer, length, req);
@@ -340,10 +339,11 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
cmd |= CMD_ASE;
ehci_writel(&hcor->or_usbcmd, cmd);
- sts = ehci_readl(&hcor->or_usbsts);
- while ((sts & STD_ASS) == 0) {
- sts = ehci_readl(&hcor->or_usbsts);
- udelay(10);
+ ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, STD_ASS,
+ 100 * 1000);
+ if (ret < 0) {
+ printf("EHCI fail timeout STD_ASS set\n");
+ goto fail;
}
/* Wait for TDs to be processed. */
@@ -360,10 +360,11 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
cmd &= ~CMD_ASE;
ehci_writel(&hcor->or_usbcmd, cmd);
- sts = ehci_readl(&hcor->or_usbsts);
- while ((sts & STD_ASS) != 0) {
- sts = ehci_readl(&hcor->or_usbsts);
- udelay(10);
+ ret = handshake((uint32_t *)&hcor->or_usbsts, STD_ASS, 0,
+ 100 * 1000);
+ if (ret < 0) {
+ printf("EHCI fail timeout STD_ASS reset\n");
+ goto fail;
}
qh_list.qh_link = cpu_to_hc32((uint32_t)&qh_list | QH_LINK_TYPE_QH);
@@ -536,7 +537,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
/* force reset to complete */
reg = reg & ~(EHCI_PS_PR | EHCI_PS_CLEAR);
ehci_writel(status_reg, reg);
- ret = handshake(status_reg, EHCI_PS_PR, 0, 2);
+ ret = handshake(status_reg, EHCI_PS_PR, 0, 2 * 1000);
if (!ret)
tmpbuf[0] |= USB_PORT_STAT_RESET;
else