sysmo-bts
/
u-boot
9
0
Fork 0
Code Pull Requests Releases Activity

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>
This commit is contained in:
Michael Trimarchi 2008-12-31 10:33:22 +01:00 committed by Remy Bohmer
parent 8fea2914ac
commit 1ed9f9adc8
1 changed files with 25 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/usb/usb_ehci_core.c
View File

@ -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