diff options
Diffstat (limited to 'src/soc/amd/stoneyridge/southbridge.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/southbridge.c | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/src/soc/amd/stoneyridge/southbridge.c b/src/soc/amd/stoneyridge/southbridge.c index 47f15cd1b5..d2495a6619 100644 --- a/src/soc/amd/stoneyridge/southbridge.c +++ b/src/soc/amd/stoneyridge/southbridge.c @@ -272,23 +272,38 @@ int sb_set_wideio_range(uint16_t start, uint16_t size) return index; } -void configure_stoneyridge_uart(void) +static void power_on_aoac_device(int aoac_device_control_register) { - u8 byte, byte2; - - if (CONFIG_UART_FOR_CONSOLE < 0 || CONFIG_UART_FOR_CONSOLE > 1) - return; + uint8_t byte; + uint8_t *register_pointer = (uint8_t *)(uintptr_t)AOAC_MMIO_BASE + + aoac_device_control_register; /* Power on the UART and AMBA devices */ - byte = read8((void *)ACPI_MMIO_BASE + AOAC_BASE + FCH_AOAC_REG56 - + CONFIG_UART_FOR_CONSOLE * 2); - byte |= AOAC_PWR_ON_DEV; - write8((void *)ACPI_MMIO_BASE + AOAC_BASE + FCH_AOAC_REG56 - + CONFIG_UART_FOR_CONSOLE * 2, byte); + byte = read8(register_pointer); + byte |= FCH_AOAC_PWR_ON_DEV; + write8(register_pointer, byte); +} + +static bool is_aoac_device_enabled(int aoac_device_status_register) +{ + uint8_t byte; + byte = read8((uint8_t *)(uintptr_t)AOAC_MMIO_BASE + + aoac_device_status_register); + byte &= (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE); + if (byte == (FCH_AOAC_PWR_RST_STATE | FCH_AOAC_RST_CLK_OK_STATE)) + return true; + else + return false; +} + +void configure_stoneyridge_uart(void) +{ + bool status; - byte = read8((void *)ACPI_MMIO_BASE + AOAC_BASE + FCH_AOAC_REG62); - byte |= AOAC_PWR_ON_DEV; - write8((void *)ACPI_MMIO_BASE + AOAC_BASE + FCH_AOAC_REG62, byte); + /* Power on the UART and AMBA devices */ + power_on_aoac_device(FCH_AOAC_D3_CONTROL_UART0 + + CONFIG_UART_FOR_CONSOLE * 2); + power_on_aoac_device(FCH_AOAC_D3_CONTROL_AMBA); /* Set the GPIO mux to UART */ write8((void *)FCH_IOMUXx89_UART0_RTS_L_EGPIO137, 0); @@ -299,15 +314,10 @@ void configure_stoneyridge_uart(void) /* Wait for the UART and AMBA devices to indicate power and clock OK */ do { udelay(100); - byte = read8((void *)ACPI_MMIO_BASE + AOAC_BASE + FCH_AOAC_REG57 + status = is_aoac_device_enabled(FCH_AOAC_D3_STATE_UART0 + CONFIG_UART_FOR_CONSOLE * 2); - byte &= (A0AC_PWR_RST_STATE | AOAC_RST_CLK_OK_STATE); - byte2 = read8((void *)ACPI_MMIO_BASE + AOAC_BASE - + FCH_AOAC_REG63); - byte2 &= (A0AC_PWR_RST_STATE | AOAC_RST_CLK_OK_STATE); - } while (!((byte == (A0AC_PWR_RST_STATE | AOAC_RST_CLK_OK_STATE)) && - (byte2 == (A0AC_PWR_RST_STATE | AOAC_RST_CLK_OK_STATE)))); - + status &= is_aoac_device_enabled(FCH_AOAC_D3_STATE_AMBA); + } while (!status); } void sb_pci_port80(void) |