diff options
| 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 | |
| parent | 304db0b38cfb04cfdb05a740d5ef27da06ea98ea (diff) | |
| download | blackbird-obmc-uboot-32e4f6bf2e35e99e1742c005e1ede4e0cf5f066c.tar.gz blackbird-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')
| -rw-r--r-- | drivers/net/macb.c | 20 | ||||
| -rw-r--r-- | drivers/net/macb.h | 11 |
2 files changed, 30 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); } diff --git a/drivers/net/macb.h b/drivers/net/macb.h index de5214fe6e..06f7c66dfd 100644 --- a/drivers/net/macb.h +++ b/drivers/net/macb.h @@ -58,6 +58,9 @@ #define MACB_WOL 0x00c4 #define MACB_MID 0x00fc +/* GEM specific register offsets */ +#define GEM_DCFG1 0x0280 + /* Bitfields in NCR */ #define MACB_LB_OFFSET 0 #define MACB_LB_SIZE 1 @@ -242,6 +245,14 @@ #define MACB_IDNUM_SIZE 16 /* Bitfields in DCFG1 */ +#define GEM_DBWDEF_OFFSET 25 +#define GEM_DBWDEF_SIZE 3 + +/* constants for data bus width */ +#define GEM_DBW32 0 +#define GEM_DBW64 1 +#define GEM_DBW128 2 + /* Constants for CLK */ #define MACB_CLK_DIV8 0 #define MACB_CLK_DIV16 1 |
