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| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2021-02-16 09:18:07 +0100 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-03-22 11:22:39 +0000 |
| commit | 9f5261e5fab2059b1b5f173388b0f0c1b7f5f308 (patch) | |
| tree | 2f40ee9491b97b5ba3bbb2a77007c7abbe204902 /src/device | |
| parent | d92966b61046bb78f2d025b61287e32d3f44b61a (diff) | |
| download | coreboot-9f5261e5fab2059b1b5f173388b0f0c1b7f5f308.tar.xz | |
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 <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50789
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/device')
| -rw-r--r-- | src/device/azalia_device.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/src/device/azalia_device.c b/src/device/azalia_device.c index 1a57be1181..2787cb218e 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 @@ int azalia_set_bits(void *port, u32 mask, u32 val) 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 @@ int azalia_exit_reset(u8 *base) 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 @@ static int codec_detect(u8 *base) /* 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 @@ u32 azalia_find_verb(const u32 *verb_table, u32 verb_table_bytes, u32 viddid, co 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_ready(u8 *base) 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 @@ static int wait_for_valid(u8 *base) 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; |