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| author | Bo Shen <voice.shen@atmel.com> | 2013-09-18 15:07:44 +0800 |
|---|---|---|
| committer | Andreas Bießmann <andreas.devel@googlemail.com> | 2013-11-04 20:32:31 +0100 |
| commit | 32e4f6bf2e35e99e1742c005e1ede4e0cf5f066c (patch) | |
| tree | 162f3cf8b80d96149c4a1a8fe337139bd80be12d /drivers/net/macb.c | |
| parent | 304db0b38cfb04cfdb05a740d5ef27da06ea98ea (diff) | |
| download | talos-obmc-uboot-32e4f6bf2e35e99e1742c005e1ede4e0cf5f066c.tar.gz talos-obmc-uboot-32e4f6bf2e35e99e1742c005e1ede4e0cf5f066c.zip | |
net: macb: get DMA bus width from design config register
Get DMA bus width from design config register
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'drivers/net/macb.c')
| -rw-r--r-- | drivers/net/macb.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/net/macb.c b/drivers/net/macb.c index bf3983a00c..781a272cff 100644 --- a/drivers/net/macb.c +++ b/drivers/net/macb.c @@ -621,6 +621,24 @@ static u32 gem_mdc_clk_div(int id, struct macb_device *macb) return config; } +/* + * Get the DMA bus width field of the network configuration register that we + * should program. We find the width from decoding the design configuration + * register to find the maximum supported data bus width. + */ +static u32 macb_dbw(struct macb_device *macb) +{ + switch (GEM_BFEXT(DBWDEF, gem_readl(macb, DCFG1))) { + case 4: + return GEM_BF(DBW, GEM_DBW128); + case 2: + return GEM_BF(DBW, GEM_DBW64); + case 1: + default: + return GEM_BF(DBW, GEM_DBW32); + } +} + int macb_eth_initialize(int id, void *regs, unsigned int phy_addr) { struct macb_device *macb; @@ -665,7 +683,7 @@ int macb_eth_initialize(int id, void *regs, unsigned int phy_addr) */ if (macb_is_gem(macb)) { ncfgr = gem_mdc_clk_div(id, macb); - ncfgr |= GEM_BF(DBW, 1); + ncfgr |= macb_dbw(macb); } else { ncfgr = macb_mdc_clk_div(id, macb); } |
