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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
This commit is contained in:
Rudolf Marek 2011-01-16 16:23:51 +00:00
parent c3dc8f8ebc
commit aa55f3768a
1 changed files with 25 additions and 14 deletions
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39
src/mainboard/asrock/939a785gmh/romstage.c
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@ -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 */