diff options
| author |   Giuseppe Cavallaro <peppe.cavallaro@st.com> | 2016-02-29 14:27:27 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-03-02 14:21:30 -0500 |
| commit | 495db27302a88fcabb105c3d30a617beda913945 (patch) | |
| tree | 852caf1e28f53c2e4d71e3b1e10551fc1386b648 /drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c | |
| parent | Merge branch 'rds-support-FRMR-and-cleanups' (diff) | |
| download | linux-dev-495db27302a88fcabb105c3d30a617beda913945.tar.xz linux-dev-495db27302a88fcabb105c3d30a617beda913945.zip | |
stmmac: share reset function between dwmac100 and dwmac1000
This patch is to share the same reset procedure between dwmac100 and
dwmac1000 chips.
This will also help on enhancing the driver and support new chips.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c index 484e3cf9c414..84e3e84cec7d 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c @@ -26,6 +26,27 @@ #define GMAC_HI_REG_AE 0x80000000 +int dwmac_dma_reset(void __iomem *ioaddr) +{ + u32 value = readl(ioaddr + DMA_BUS_MODE); + int limit; + + /* DMA SW reset */ + value |= DMA_BUS_MODE_SFT_RESET; + writel(value, ioaddr + DMA_BUS_MODE); + limit = 10; + while (limit--) { + if (!(readl(ioaddr + DMA_BUS_MODE) & DMA_BUS_MODE_SFT_RESET)) + break; + mdelay(10); + } + + if (limit < 0) + return -EBUSY; + + return 0; +} + /* CSR1 enables the transmit DMA to check for new descriptor */ void dwmac_enable_dma_transmission(void __iomem *ioaddr) { |