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-rw-r--r--src/mainboard/asrock/939a785gmh/mainboard.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/mainboard/asrock/939a785gmh/mainboard.c b/src/mainboard/asrock/939a785gmh/mainboard.c
index 09ace66fca..c7eedeafb8 100644
--- a/src/mainboard/asrock/939a785gmh/mainboard.c
+++ b/src/mainboard/asrock/939a785gmh/mainboard.c
@@ -35,12 +35,31 @@ uint64_t uma_memory_base, uma_memory_size;
void set_pcie_dereset(void);
void set_pcie_reset(void);
u8 is_dev3_present(void);
+
+static void pcie_rst_toggle(u8 val) {
+ u8 byte;
+
+ byte = pm_ioread(0x8d);
+ byte &= ~(3 << 1);
+ pm_iowrite(0x8d, byte);
+
+ byte = pm_ioread(0x94);
+ /* Output enable */
+ byte &= ~(3 << 2);
+ /* Toggle GPM8, GPM9 */
+ byte &= ~(3 << 0);
+ byte |= val;
+ pm_iowrite(0x94, byte);
+}
+
void set_pcie_dereset()
{
+ pcie_rst_toggle(0x3);
}
void set_pcie_reset()
{
+ pcie_rst_toggle(0x0);
}
#if 0 /* not tested yet */