Change in coreboot[master]: device/azalia_device.c: Switch to stopwatch

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/50789 )

Change subject: device/azalia_device.c: Switch to stopwatch
......................................................................

device/azalia_device.c: Switch to stopwatch

Use timer.h helpers instead of open-coding timeout handling in polling
loops. The 25-microsecond delay in `wait_for_valid` looks odd, and may
be removed in subsequent commits. For now, preserve existing behavior.

Change-Id: Id1227c6812618597c37408a7bf53bcbcae97374a
Signed-off-by: Patrick Rudolph 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50789
Reviewed-by: Arthur Heymans 
Tested-by: build bot (Jenkins) 
---
M src/device/azalia_device.c
1 file changed, 16 insertions(+), 12 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Arthur Heymans: Looks good to me, approved

diff --git a/src/device/azalia_device.c b/src/device/azalia_device.c
index 1a57be1..2787cb2 100644
--- a/src/device/azalia_device.c
+++ b/src/device/azalia_device.c
@@ -6,11 +6,12 @@
 #include <device/azalia_device.h>
 #include <device/mmio.h>
 #include <delay.h>
+#include <timer.h>

int azalia_set_bits(void *port, u32 mask, u32 val)
 {
+	struct stopwatch sw;
    u32 reg32;
-	int count;

/* Write (val & mask) to port */
    val &= mask;
@@ -20,16 +21,16 @@
    write32(port, reg32);

/* Wait for readback of register to match what was just written to it */
-	count = 50;
+	stopwatch_init_msecs_expire(&sw, 50);
    do {
    	/* Wait 1ms based on BKDG wait time */
    	mdelay(1);
    	reg32 = read32(port);
    	reg32 &= mask;
-	} while ((reg32 != val) && --count);
+	} while ((reg32 != val) && !stopwatch_expired(&sw));

/* Timeout occurred */
-	if (!count)
+	if (stopwatch_expired(&sw))
    	return -1;
    return 0;
 }
@@ -48,8 +49,8 @@

static int codec_detect(u8 *base)
 {
+	struct stopwatch sw;
    u32 reg32;
-	int count;

if (azalia_exit_reset(base) < 0)
    	goto no_codec;
@@ -62,14 +63,15 @@
    /* Wait for readback of register to
     * match what was just written to it
     */
-	count = 50;
+	stopwatch_init_msecs_expire(&sw, 50);
    do {
    	/* Wait 1ms based on BKDG wait time */
    	mdelay(1);
    	reg32 = read32(base + HDA_STATESTS_REG);
-	} while ((reg32 != 0) && --count);
+	} while ((reg32 != 0) && !stopwatch_expired(&sw));
+
    /* Timeout occurred */
-	if (!count)
+	if (stopwatch_expired(&sw))
    	goto no_codec;

if (azalia_enter_reset(base) < 0)
@@ -145,10 +147,11 @@

static int wait_for_ready(u8 *base)
 {
+	struct stopwatch sw;
    /* Use a 50 usec timeout - the Linux kernel uses the same duration */
-	int timeout = 50;
+	stopwatch_init_usecs_expire(&sw, 50);

-	while (timeout--) {
+	while (!stopwatch_expired(&sw)) {
    	u32 reg32 = read32(base + HDA_ICII_REG);
    	if (!(reg32 & HDA_ICII_BUSY))
    		return 0;
@@ -165,6 +168,7 @@

static int wait_for_valid(u8 *base)
 {
+	struct stopwatch sw;
    u32 reg32;
    /* Use a 50 usec timeout - the Linux kernel uses the same duration */
    int timeout = 25;
@@ -177,8 +181,8 @@
    while (timeout--)
    	udelay(1);

-	timeout = 50;
-	while (timeout--) {
+	stopwatch_init_usecs_expire(&sw, 50);
+	while (!stopwatch_expired(&sw)) {
    	reg32 = read32(base + HDA_ICII_REG);
    	if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) == HDA_ICII_VALID)
    		return 0;