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arm/km: support the 2 PCIe fpga resets

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The PCIe FPGAs now have to support 2 resets: one for the non traffic
affecting part (PCIe) and one for the traffic affecting part.

When the FPGA is not reconfigured, we only reset the PCIe part.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
This commit is contained in:
Valentin Longchamp 2012-07-05 05:05:09 +00:00 committed by Albert ARIBAUD
parent bcac5b1b2c
commit dbdee4ca59
1 changed files with 9 additions and 4 deletions
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13
board/keymile/km_arm/fpga_config.c
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@ -99,7 +99,7 @@ static int boco_set_bits(u8 reg, u8 flags)
#define FPGA_INIT_B 0x10 #define FPGA_INIT_B 0x10
#define FPGA_DONE 0x20 #define FPGA_DONE 0x20
static int fpga_done() static int fpga_done(void)
{ {
int ret = 0; int ret = 0;
u8 regval; u8 regval;
@ -206,25 +206,30 @@ int wait_for_fpga_config(void)
} }
#define PRST1 0x4 #define PRST1 0x4
#define BRIDGE_RST 0x4 #define PCIE_RST 0x10
#define TRAFFIC_RST 0x04
int fpga_reset(void) int fpga_reset(void)
{ {
int ret = 0; int ret = 0;
u8 resets;
if (!check_boco2()) { if (!check_boco2()) {
/* we do not have BOCO2, this is not really used */ /* we do not have BOCO2, this is not really used */
return 0; return 0;
} }
ret = boco_clear_bits(PRST1, BRIDGE_RST); /* if we have skipped, we only want to reset the PCIe part */
resets = skip ? PCIE_RST : PCIE_RST | TRAFFIC_RST;
ret = boco_clear_bits(PRST1, resets);
if (ret) if (ret)
return ret; return ret;
/* small delay for the pulse */ /* small delay for the pulse */
udelay(10); udelay(10);
ret = boco_set_bits(PRST1, BRIDGE_RST); ret = boco_set_bits(PRST1, resets);
if (ret) if (ret)
return ret; return ret;