* [PATCH 1/2] usb: dwc2: Move polling function to core.c.
2017-04-27 13:02 [PATCH 0/2] usb: dwc2: Replace polling code with function calls Sevak Arakelyan
@ 2017-04-27 13:02 ` Sevak Arakelyan
2017-04-27 13:03 ` [PATCH 2/2] usb: dwc2: Use common polling function Sevak Arakelyan
1 sibling, 0 replies; 3+ messages in thread
From: Sevak Arakelyan @ 2017-04-27 13:02 UTC (permalink / raw)
To: John Youn, Felipe Balbi, Greg Kroah-Hartman, linux-usb,
linux-kernel
Cc: Sevak Arakelyan
Move polling function to core.c so it can be used
anywhere in the code.
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
---
drivers/usb/dwc2/core.c | 23 +++++++++++++++++++++++
drivers/usb/dwc2/core.h | 4 ++++
drivers/usb/dwc2/gadget.c | 14 --------------
3 files changed, 27 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 42ac47f85bb4..96d0b2b202e3 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -791,6 +791,29 @@ bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg)
(op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE);
}
+/**
+ * dwc2_hsotg_wait_bit_set - Waits for bit to be set.
+ * @hsotg: Programming view of DWC_otg controller.
+ * @offset: Register's offset where bit/bits must be set.
+ * @mask: Mask of the bit/bits which must be set.
+ * @timeout: Timeout to wait.
+ *
+ * Return: 0 if bit/bits are set or -ETIMEDOUT in case of timeout.
+ */
+int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hsotg, u32 offset, u32 mask,
+ u32 timeout)
+{
+ u32 i;
+
+ for (i = 0; i < timeout; i++) {
+ if (dwc2_readl(hsotg->regs + offset) & mask)
+ return 0;
+ udelay(1);
+ }
+
+ return -ETIMEDOUT;
+}
+
MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
MODULE_AUTHOR("Synopsys, Inc.");
MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 67ca7575a940..670a6c5fbed5 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -1124,6 +1124,10 @@ extern const struct of_device_id dwc2_of_match_table[];
int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg);
int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg);
+/* Common polling function */
+int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hs_otg, u32 reg, u32 bit,
+ u32 timeout);
+
/* Parameters */
int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
int dwc2_init_params(struct dwc2_hsotg *hsotg);
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 98a4a79e7f6e..05244f2b9955 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3694,20 +3694,6 @@ static irqreturn_t dwc2_hsotg_irq(int irq, void *pw)
return IRQ_HANDLED;
}
-static int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hs_otg, u32 reg,
- u32 bit, u32 timeout)
-{
- u32 i;
-
- for (i = 0; i < timeout; i++) {
- if (dwc2_readl(hs_otg->regs + reg) & bit)
- return 0;
- udelay(1);
- }
-
- return -ETIMEDOUT;
-}
-
static void dwc2_hsotg_ep_stop_xfr(struct dwc2_hsotg *hsotg,
struct dwc2_hsotg_ep *hs_ep)
{
--
2.11.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH 2/2] usb: dwc2: Use common polling function.
2017-04-27 13:02 [PATCH 0/2] usb: dwc2: Replace polling code with function calls Sevak Arakelyan
2017-04-27 13:02 ` [PATCH 1/2] usb: dwc2: Move polling function to core.c Sevak Arakelyan
@ 2017-04-27 13:03 ` Sevak Arakelyan
1 sibling, 0 replies; 3+ messages in thread
From: Sevak Arakelyan @ 2017-04-27 13:03 UTC (permalink / raw)
To: John Youn, Felipe Balbi, Greg Kroah-Hartman, linux-usb,
linux-kernel
Cc: Sevak Arakelyan
Replace all the parts of register polling code with
dwc2_hsotg_wait_bit_set function calls.
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
---
drivers/usb/dwc2/core.c | 61 +++++++++++++----------------------------------
drivers/usb/dwc2/gadget.c | 24 ++++---------------
drivers/usb/dwc2/hcd.c | 18 +++++---------
3 files changed, 27 insertions(+), 76 deletions(-)
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 96d0b2b202e3..84ab51990998 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -316,7 +316,6 @@ static bool dwc2_iddig_filter_enabled(struct dwc2_hsotg *hsotg)
int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait)
{
u32 greset;
- int count = 0;
bool wait_for_host_mode = false;
dev_vdbg(hsotg->dev, "%s()\n", __func__);
@@ -345,29 +344,19 @@ int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait)
greset = dwc2_readl(hsotg->regs + GRSTCTL);
greset |= GRSTCTL_CSFTRST;
dwc2_writel(greset, hsotg->regs + GRSTCTL);
- do {
- udelay(1);
- greset = dwc2_readl(hsotg->regs + GRSTCTL);
- if (++count > 50) {
- dev_warn(hsotg->dev,
- "%s() HANG! Soft Reset GRSTCTL=%0x\n",
- __func__, greset);
- return -EBUSY;
- }
- } while (greset & GRSTCTL_CSFTRST);
+
+ if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_CSFTRST, 50)) {
+ dev_warn(hsotg->dev, "%s: HANG! Soft Reset timeout GRSTCTL GRSTCTL_CSFTRST\n",
+ __func__);
+ return -EBUSY;
+ }
/* Wait for AHB master IDLE state */
- count = 0;
- do {
- udelay(1);
- greset = dwc2_readl(hsotg->regs + GRSTCTL);
- if (++count > 50) {
- dev_warn(hsotg->dev,
- "%s() HANG! AHB Idle GRSTCTL=%0x\n",
- __func__, greset);
- return -EBUSY;
- }
- } while (!(greset & GRSTCTL_AHBIDLE));
+ if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 50)) {
+ dev_warn(hsotg->dev, "%s: HANG! AHB Idle timeout GRSTCTL GRSTCTL_AHBIDLE\n",
+ __func__);
+ return -EBUSY;
+ }
if (wait_for_host_mode && !skip_wait)
dwc2_wait_for_mode(hsotg, true);
@@ -665,7 +654,6 @@ void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg)
void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
{
u32 greset;
- int count = 0;
dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num);
@@ -673,17 +661,9 @@ void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK;
dwc2_writel(greset, hsotg->regs + GRSTCTL);
- do {
- greset = dwc2_readl(hsotg->regs + GRSTCTL);
- if (++count > 10000) {
- dev_warn(hsotg->dev,
- "%s() HANG! GRSTCTL=%0x GNPTXSTS=0x%08x\n",
- __func__, greset,
- dwc2_readl(hsotg->regs + GNPTXSTS));
- break;
- }
- udelay(1);
- } while (greset & GRSTCTL_TXFFLSH);
+ if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_TXFFLSH, 10000))
+ dev_warn(hsotg->dev, "%s: HANG! timeout GRSTCTL GRSTCTL_TXFFLSH\n",
+ __func__);
/* Wait for at least 3 PHY Clocks */
udelay(1);
@@ -697,22 +677,15 @@ void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg)
{
u32 greset;
- int count = 0;
dev_vdbg(hsotg->dev, "%s()\n", __func__);
greset = GRSTCTL_RXFFLSH;
dwc2_writel(greset, hsotg->regs + GRSTCTL);
- do {
- greset = dwc2_readl(hsotg->regs + GRSTCTL);
- if (++count > 10000) {
- dev_warn(hsotg->dev, "%s() HANG! GRSTCTL=%0x\n",
- __func__, greset);
- break;
- }
- udelay(1);
- } while (greset & GRSTCTL_RXFFLSH);
+ if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_RXFFLSH, 10000))
+ dev_warn(hsotg->dev, "%s: HANG! timeout GRSTCTL GRSTCTL_RXFFLSH\n",
+ __func__);
/* Wait for at least 3 PHY Clocks */
udelay(1);
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 05244f2b9955..3c48513fe98d 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -292,6 +292,7 @@ static void dwc2_hsotg_init_periodic_fifos(struct dwc2_hsotg *hsotg)
unsigned int ep;
unsigned int addr;
int fifo_count;
+
u32 val;
u32 *txfsz = hsotg->params.g_tx_fifo_size;
@@ -2519,30 +2520,13 @@ static void dwc2_hsotg_set_ep_maxpacket(struct dwc2_hsotg *hsotg,
*/
static void dwc2_hsotg_txfifo_flush(struct dwc2_hsotg *hsotg, unsigned int idx)
{
- int timeout;
- int val;
-
dwc2_writel(GRSTCTL_TXFNUM(idx) | GRSTCTL_TXFFLSH,
hsotg->regs + GRSTCTL);
/* wait until the fifo is flushed */
- timeout = 100;
-
- while (1) {
- val = dwc2_readl(hsotg->regs + GRSTCTL);
-
- if ((val & (GRSTCTL_TXFFLSH)) == 0)
- break;
-
- if (--timeout == 0) {
- dev_err(hsotg->dev,
- "%s: timeout flushing fifo (GRSTCTL=%08x)\n",
- __func__, val);
- break;
- }
-
- udelay(1);
- }
+ if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_TXFFLSH, 100))
+ dev_warn(hsotg->dev, "%s: timeout flushing fifo GRSTCTL_TXFFLSH\n",
+ __func__);
}
/**
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index f4ef159b538e..55df8019cb90 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -2392,24 +2392,18 @@ static void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
/* Halt all channels to put them into a known state */
for (i = 0; i < num_channels; i++) {
- int count = 0;
-
hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
hcchar &= ~HCCHAR_EPDIR;
dwc2_writel(hcchar, hsotg->regs + HCCHAR(i));
dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
__func__, i);
- do {
- hcchar = dwc2_readl(hsotg->regs + HCCHAR(i));
- if (++count > 1000) {
- dev_err(hsotg->dev,
- "Unable to clear enable on channel %d\n",
- i);
- break;
- }
- udelay(1);
- } while (hcchar & HCCHAR_CHENA);
+
+ if (dwc2_hsotg_wait_bit_set(hsotg, HCCHAR(i),
+ HCCHAR_CHENA, 1000)) {
+ dev_warn(hsotg->dev, "Unable to clear enable on channal %d\n",
+ i);
+ }
}
}
--
2.11.0
^ permalink raw reply related [flat|nested] 3+ messages in thread