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usb: dwc2: Use shared wait_for_bit 

Use existing library function to poll bit(s).

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
This commit is contained in:
Mateusz Kulikowski 2016-01-23 11:54:30 +01:00 committed by Tom Rini
parent 9afdf4021a
commit fd2cd66290
1 changed files with 13 additions and 28 deletions
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41
drivers/usb/host/dwc2.c
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@ -13,6 +13,7 @@
#include <memalign.h>
#include <phys2bus.h>
#include <usbroothubdes.h>
#include <wait_bit.h>
#include <asm/io.h>
#include "dwc2.h"
@ -52,27 +53,6 @@ static struct dwc2_priv local;
/*
* DWC2 IP interface
*/
static int wait_for_bit(void *reg, const uint32_t mask, bool set)
{
unsigned int timeout = 1000000;
uint32_t val;
while (--timeout) {
val = readl(reg);
if (!set)
val = ~val;
if ((val & mask) == mask)
return 0;
udelay(1);
}
debug("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n",
__func__, reg, mask, set);
return -ETIMEDOUT;
}
/*
* Initializes the FSLSPClkSel field of the HCFG register
@ -117,7 +97,8 @@ static void dwc_otg_flush_tx_fifo(struct dwc2_core_regs *regs, const int num)
writel(DWC2_GRSTCTL_TXFFLSH | (num << DWC2_GRSTCTL_TXFNUM_OFFSET),
&regs->grstctl);
ret = wait_for_bit(&regs->grstctl, DWC2_GRSTCTL_TXFFLSH, 0);
ret = wait_for_bit(__func__, &regs->grstctl, DWC2_GRSTCTL_TXFFLSH,
false, 1000, false);
if (ret)
printf("%s: Timeout!\n", __func__);
@ -135,7 +116,8 @@ static void dwc_otg_flush_rx_fifo(struct dwc2_core_regs *regs)
int ret;
writel(DWC2_GRSTCTL_RXFFLSH, &regs->grstctl);
ret = wait_for_bit(&regs->grstctl, DWC2_GRSTCTL_RXFFLSH, 0);
ret = wait_for_bit(__func__, &regs->grstctl, DWC2_GRSTCTL_RXFFLSH,
false, 1000, false);
if (ret)
printf("%s: Timeout!\n", __func__);
@ -152,13 +134,15 @@ static void dwc_otg_core_reset(struct dwc2_core_regs *regs)
int ret;
/* Wait for AHB master IDLE state. */
ret = wait_for_bit(&regs->grstctl, DWC2_GRSTCTL_AHBIDLE, 1);
ret = wait_for_bit(__func__, &regs->grstctl, DWC2_GRSTCTL_AHBIDLE,
true, 1000, false);
if (ret)
printf("%s: Timeout!\n", __func__);
/* Core Soft Reset */
writel(DWC2_GRSTCTL_CSFTRST, &regs->grstctl);
ret = wait_for_bit(&regs->grstctl, DWC2_GRSTCTL_CSFTRST, 0);
ret = wait_for_bit(__func__, &regs->grstctl, DWC2_GRSTCTL_CSFTRST,
false, 1000, false);
if (ret)
printf("%s: Timeout!\n", __func__);
@ -243,8 +227,8 @@ static void dwc_otg_core_host_init(struct dwc2_core_regs *regs)
clrsetbits_le32(&regs->hc_regs[i].hcchar,
DWC2_HCCHAR_EPDIR,
DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS);
ret = wait_for_bit(&regs->hc_regs[i].hcchar,
DWC2_HCCHAR_CHEN, 0);
ret = wait_for_bit(__func__, &regs->hc_regs[i].hcchar,
DWC2_HCCHAR_CHEN, false, 1000, false);
if (ret)
printf("%s: Timeout!\n", __func__);
}
@ -737,7 +721,8 @@ int wait_for_chhltd(struct dwc2_core_regs *regs, uint32_t *sub, int *toggle,
int ret;
uint32_t hcint, hctsiz;
ret = wait_for_bit(&hc_regs->hcint, DWC2_HCINT_CHHLTD, true);
ret = wait_for_bit(__func__, &hc_regs->hcint, DWC2_HCINT_CHHLTD, true,
1000, false);
if (ret)
return ret;