diff options
| author | Rudolf Marek <r.marek@assembler.cz> | 2011-01-16 16:23:51 +0000 |
|---|---|---|
| committer | Rudolf Marek <r.marek@assembler.cz> | 2011-01-16 16:23:51 +0000 |
| commit | aa55f3768a5420715c9b9bdf01d809a2110103a4 (patch) | |
| tree | b4295e0508a54a349dd817ff38582123bac4cd50 /src/mainboard | |
| parent | c3dc8f8ebc57f35132687a1a1a201ef08063c195 (diff) | |
Trivial, cleanup of GPIO comments.
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Rudolf Marek <r.marek@assembler.cz>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6256 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/asrock/939a785gmh/romstage.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/src/mainboard/asrock/939a785gmh/romstage.c b/src/mainboard/asrock/939a785gmh/romstage.c index 76b8b510b9..c5f3a8b196 100644 --- a/src/mainboard/asrock/939a785gmh/romstage.c +++ b/src/mainboard/asrock/939a785gmh/romstage.c @@ -78,7 +78,7 @@ static void sio_init(void) pnp_enter_ext_func_mode(GPIO2345_DEV); pnp_set_logical_device(GPIO2345_DEV); - /* Pin 119 ~ 120 GP21, GP20 */ + /* Pin 119 ~ 120 is GP21, GP20 */ reg = pnp_read_config(GPIO2345_DEV, 0x29); pnp_write_config(GPIO2345_DEV, 0x29, (reg | 2)); @@ -90,28 +90,39 @@ static void sio_init(void) pnp_write_config(GPIO2345_DEV, 0x2c, 0x1); pnp_write_config(GPIO2345_DEV, 0x2d, 0x1); -//idx 30 e0 e1 e2 e3 e4 e5 e6 e7 e8 e9 f0 f1 f2 f3 f4 f5 f6 f7 fe -//val 07 XX XX XX f6 0e 00 00 00 00 ff d6 96 00 40 d0 83 00 00 07 - -//GPO20 - 1 = 1.82 0 = 1.92 sideport voltage -//mGPUV GPO40 | GPO41 | GPIO23 - 000 - 1.45V step 0.05 -- 111 - 1.10V -//DDR voltage 44 45 46 - - /* GPO20 - sideport voltage GPO23 - mgpuV */ + /* GPO20 - sideport voltage 1 = 1.82 0 = 1.92 + GPI21 - unknown input (NC?) + GPI22 - unknown input (NC?) + GPO23 - mgpuV bit0 + GP24-27 - PS/2 mouse/keyb (only keyb is connected use flip interface for mouse)*/ + */ pnp_write_config(GPIO2345_DEV, 0x30, 0x07); /* Enable GPIO 2,3,4. */ pnp_write_config(GPIO2345_DEV, 0xe3, 0xf6); /* dir of GPIO2 11110110*/ pnp_write_config(GPIO2345_DEV, 0xe4, 0x0e); /* data */ pnp_write_config(GPIO2345_DEV, 0xe5, 0x00); /* No inversion */ - /* GPO30 GPO33 GPO35 */ - //GPO35 - loadline control 0 - enabled - //GPIO30 - unknown - //GPIO33 - unknown + /* GPIO30 - unknown output, set to 0 + GPI31 - unknown input NC? + GPI32 - unknown input NC? + GPIO33 - unknown output, set to 0. + GPI34 - unknown input NC? + GPO35 - loadline control 1 = enabled (2 phase clock) 0 = disabled 4 phase clock + GPIO36 - input = HT voltage 1.30V output (low) = HT voltage 1.35V + GP37 - unknown input NC? */ + pnp_write_config(GPIO2345_DEV, 0xf0, 0xd6); /* dir of GPIO3 11010110*/ pnp_write_config(GPIO2345_DEV, 0xf1, 0x96); /* data */ pnp_write_config(GPIO2345_DEV, 0xf2, 0x00); /* No inversion */ - /* GPO40 GPO41 GPO42 GPO43 PO45 */ + /* GPO40 - mgpuV bit2 + GPO41 - mgpuV bit1 + GPO42 - IRTX + GPO43 - IRRX + GPIO44 - memory voltage bit2 (input/outputlow) + GPIO45 - memory voltage bit1 (2.60 (000) - 2.95 (111)) + GPIO46 - memory voltage bit0 + GPIO47 - unknown input? */ + pnp_write_config(GPIO2345_DEV, 0xf4, 0xd0); /* dir of GPIO4 11010000 */ pnp_write_config(GPIO2345_DEV, 0xf5, 0x83); /* data */ pnp_write_config(GPIO2345_DEV, 0xf6, 0x00); /* No inversion */ |