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| author | eric miao <eric.miao@marvell.com> | 2007-11-23 14:55:59 +0800 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-01-26 15:07:53 +0000 |
| commit | 732ce16066964bb7b60947750e48374cc32bd310 (patch) | |
| tree | 47f24dd7e8dbf11763c7d8329164cc0579b1e9f1 /arch/arm/mach-pxa/ssp.c | |
| parent | 5a1f21b1e546fafe840944f02949c1a8a8725132 (diff) | |
| download | linux-3.10-732ce16066964bb7b60947750e48374cc32bd310.tar.gz linux-3.10-732ce16066964bb7b60947750e48374cc32bd310.tar.bz2 linux-3.10-732ce16066964bb7b60947750e48374cc32bd310.zip | |
[ARM] pxa: ensure SSP TX FIFO is empty instead of not full for pxa3xx
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/ssp.c')
| -rw-r--r-- | arch/arm/mach-pxa/ssp.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c index 575b662200a..4954da907d4 100644 --- a/arch/arm/mach-pxa/ssp.c +++ b/arch/arm/mach-pxa/ssp.c @@ -138,6 +138,16 @@ int ssp_flush(struct ssp_dev *dev) struct ssp_device *ssp = dev->ssp; int timeout = TIMEOUT * 2; + /* ensure TX FIFO is empty instead of not full */ + if (cpu_is_pxa3xx()) { + while (__raw_readl(ssp->mmio_base + SSSR) & 0xf00) { + if (!--timeout) + return -ETIMEDOUT; + cpu_relax(); + } + timeout = TIMEOUT * 2; + } + do { while (__raw_readl(ssp->mmio_base + SSSR) & SSSR_RNE) { if (!--timeout) |