Hello,
I just found out how to take the PCIe x16 out of reset.
Following patch fills in the callbacks for PCIe x16 resets. This board uses
GPM8,GPM9 as reset toggles.
Signed-off-by: Rudolf Marek <[email protected]>
Thanks,
Rudolf
Index: src/mainboard/asrock/939a785gmh/mainboard.c
===================================================================
--- src/mainboard/asrock/939a785gmh/mainboard.c (revision 6381)
+++ src/mainboard/asrock/939a785gmh/mainboard.c (working copy)
@@ -35,12 +35,31 @@
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 */
--
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