diff options
Diffstat (limited to 'board/keymile')
| -rw-r--r-- | board/keymile/km_arm/fpga_config.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/board/keymile/km_arm/fpga_config.c b/board/keymile/km_arm/fpga_config.c index 4356b9a..8ac6393 100644 --- a/board/keymile/km_arm/fpga_config.c +++ b/board/keymile/km_arm/fpga_config.c @@ -96,12 +96,43 @@ static int boco_set_bits(u8 reg, u8 flags) #define SPI_REG 0x06 #define CFG_EEPROM 0x02 #define FPGA_PROG 0x04 +#define FPGA_INIT_B 0x10 #define FPGA_DONE 0x20 +static int fpga_done() +{ + int ret = 0; + u8 regval; + + /* this is only supported with the boco2 design */ + if (!check_boco2()) + return 0; + + ret = i2c_read(BOCO_ADDR, SPI_REG, 1, ®val, 1); + if (ret) { + printf("%s: error reading the BOCO @%#x !!\n", + __func__, SPI_REG); + return 0; + } + + return regval & FPGA_DONE ? 1 : 0; +} + +int skip; + int trigger_fpga_config(void) { int ret = 0; + /* if the FPGA is already configured, we do not want to + * reconfigure it */ + skip = 0; + if (fpga_done()) { + printf("PCIe FPGA config: skipped\n"); + skip = 1; + return 0; + } + if (check_boco2()) { /* we have a BOCO2, this has to be triggered here */ @@ -111,7 +142,7 @@ int trigger_fpga_config(void) return ret; /* trigger the config start */ - ret = boco_clear_bits(SPI_REG, FPGA_PROG); + ret = boco_clear_bits(SPI_REG, FPGA_PROG | FPGA_INIT_B); if (ret) return ret; @@ -123,6 +154,11 @@ int trigger_fpga_config(void) if (ret) return ret; + /* finally, raise INIT_B to remove the config delay */ + ret = boco_set_bits(SPI_REG, FPGA_INIT_B); + if (ret) + return ret; + } else { /* we do it the old way, with the gpio pin */ kw_gpio_set_valid(KM_XLX_PROGRAM_B_PIN, 1); @@ -141,6 +177,9 @@ int wait_for_fpga_config(void) u8 spictrl; u32 timeout = 20000; + if (skip) + return 0; + if (!check_boco2()) { /* we do not have BOCO2, this is not really used */ return 0; |