diff options
Diffstat (limited to 'src/drivers/oxford')
| -rw-r--r-- | src/drivers/oxford/oxpcie/oxpcie_early.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/src/drivers/oxford/oxpcie/oxpcie_early.c b/src/drivers/oxford/oxpcie/oxpcie_early.c index 2c7767e50d..4f7a3cb105 100644 --- a/src/drivers/oxford/oxpcie/oxpcie_early.c +++ b/src/drivers/oxford/oxpcie/oxpcie_early.c @@ -20,6 +20,8 @@ #include <stdint.h> #include <arch/io.h> #include <arch/romcc_io.h> +#include <cpu/x86/car.h> +#include <delay.h> #include <uart8250.h> #include <device/pci_def.h> @@ -34,9 +36,13 @@ #define OXPCIE_DEVICE_3 \ PCI_DEV(CONFIG_OXFORD_OXPCIE_BRIDGE_SUBORDINATE, 0, 3) +#if defined(__PRE_RAM__) +int oxford_oxpcie_present CAR_GLOBAL; + void oxford_init(void) { u16 reg16; + oxford_oxpcie_present = 1; /* First we reset the secondary bus */ reg16 = pci_read_config16(PCIE_BRIDGE, PCI_BRIDGE_CONTROL); @@ -69,11 +75,14 @@ void oxford_init(void) reg16 |= PCI_COMMAND_MEMORY; pci_write_config16(PCIE_BRIDGE, PCI_COMMAND, reg16); - // FIXME Add a timeout or this will hang forever if - // no device is in the slot. + u32 timeout = 20000; // Timeout in 10s of microseconds. u32 id = 0; - while ((id == 0) || (id == 0xffffffff)) + for (;;) { id = pci_read_config32(OXPCIE_DEVICE, PCI_VENDOR_ID); + if (!timeout-- || (id != 0 && id != 0xffffffff)) + break; + udelay(10); + } u32 device = OXPCIE_DEVICE; /* unknown default */ switch (id) { @@ -90,6 +99,10 @@ void oxford_init(void) case 0xc1581415: /* e.g. Startech MPEX2S952 */ device = OXPCIE_DEVICE; break; + default: + /* No UART here. */ + oxford_oxpcie_present = 0; + return; } /* Setup base address on device */ @@ -107,3 +120,4 @@ void oxford_init(void) uart8250_mem_init(uart0_base, (4000000 / CONFIG_TTYS0_BAUD)); } +#endif |