diff options
| author | Aaro Koskinen <aaro.koskinen@iki.fi> | 2011-02-13 22:11:28 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-03-22 15:21:01 +0900 |
| commit | 42dea903bf56414aa1eb299412a744b0fd269931 (patch) | |
| tree | 26f924001e7d6056c33d0fa588b0b3217aae23f8 /drivers/video/sis | |
| parent | c9982d59c5c877a65fbdef3c875e82eaa95c2505 (diff) | |
sisfb: add support for XGI Z9 DDR2 POST
Add support for ZGI Z9 DDR2 POST. The init sequence is from XGI's
xgifb driver.
Tested with ARM board using a PCI card with XGI Z9s and 32 MB DDR2
memory. After a cold reset the POST succeeds.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/video/sis')
| -rw-r--r-- | drivers/video/sis/sis_main.c | 77 |
1 files changed, 68 insertions, 9 deletions
diff --git a/drivers/video/sis/sis_main.c b/drivers/video/sis/sis_main.c index 9c52d7bbef70..75259845933d 100644 --- a/drivers/video/sis/sis_main.c +++ b/drivers/video/sis/sis_main.c @@ -4983,6 +4983,48 @@ sisfb_post_xgi_ddr2_mrs_default(struct sis_video_info *ivideo, u8 regb) } static void __devinit +sisfb_post_xgi_ddr2_mrs_xg21(struct sis_video_info *ivideo) +{ + sisfb_post_xgi_setclocks(ivideo, 1); + + SiS_SetReg(SISCR, 0x97, 0x11); + sisfb_post_xgi_delay(ivideo, 0x46); + + SiS_SetReg(SISSR, 0x18, 0x00); /* EMRS2 */ + SiS_SetReg(SISSR, 0x19, 0x80); + SiS_SetReg(SISSR, 0x16, 0x05); + SiS_SetReg(SISSR, 0x16, 0x85); + + SiS_SetReg(SISSR, 0x18, 0x00); /* EMRS3 */ + SiS_SetReg(SISSR, 0x19, 0xc0); + SiS_SetReg(SISSR, 0x16, 0x05); + SiS_SetReg(SISSR, 0x16, 0x85); + + SiS_SetReg(SISSR, 0x18, 0x00); /* EMRS1 */ + SiS_SetReg(SISSR, 0x19, 0x40); + SiS_SetReg(SISSR, 0x16, 0x05); + SiS_SetReg(SISSR, 0x16, 0x85); + + SiS_SetReg(SISSR, 0x18, 0x42); /* MRS1 */ + SiS_SetReg(SISSR, 0x19, 0x02); + SiS_SetReg(SISSR, 0x16, 0x05); + SiS_SetReg(SISSR, 0x16, 0x85); + sisfb_post_xgi_delay(ivideo, 1); + + SiS_SetReg(SISSR, 0x1b, 0x04); + sisfb_post_xgi_delay(ivideo, 1); + + SiS_SetReg(SISSR, 0x1b, 0x00); + sisfb_post_xgi_delay(ivideo, 1); + + SiS_SetReg(SISSR, 0x18, 0x42); /* MRS1 */ + SiS_SetReg(SISSR, 0x19, 0x00); + SiS_SetReg(SISSR, 0x16, 0x05); + SiS_SetReg(SISSR, 0x16, 0x85); + sisfb_post_xgi_delay(ivideo, 1); +} + +static void __devinit sisfb_post_xgi_ddr2(struct sis_video_info *ivideo, u8 regb) { unsigned char *bios = ivideo->bios_abase; @@ -5000,6 +5042,7 @@ sisfb_post_xgi_ddr2(struct sis_video_info *ivideo, u8 regb) u8 v2; u8 v3; + SiS_SetReg(SISCR, 0xb0, 0x80); /* DDR2 dual frequency mode */ SiS_SetReg(SISCR, 0x82, 0x77); SiS_SetReg(SISCR, 0x86, 0x00); reg = SiS_GetReg(SISCR, 0x86); @@ -5021,7 +5064,10 @@ sisfb_post_xgi_ddr2(struct sis_video_info *ivideo, u8 regb) SiS_SetReg(SISCR, 0x82, v3); SiS_SetReg(SISCR, 0x98, 0x01); SiS_SetReg(SISCR, 0x9a, 0x02); - sisfb_post_xgi_ddr2_default(ivideo, regb); + if (sisfb_xgi_is21(ivideo)) + sisfb_post_xgi_ddr2_mrs_xg21(ivideo); + else + sisfb_post_xgi_ddr2_mrs_default(ivideo, regb); } static u8 __devinit @@ -5346,9 +5392,23 @@ sisfb_post_xgi(struct pci_dev *pdev) SiS_SetReg(SISCR, 0x77, v1); } - /* RAM type */ - - regb = 0; /* ! */ + /* RAM type: + * + * 0 == DDR1, 1 == DDR2, 2..7 == reserved? + * + * The code seems to written so that regb should equal ramtype, + * however, so far it has been hardcoded to 0. Enable other values only + * on XGI Z9, as it passes the POST, and add a warning for others. + */ + ramtype = sisfb_post_xgi_ramtype(ivideo); + if (!sisfb_xgi_is21(ivideo) && ramtype) { + dev_warn(&pdev->dev, + "RAM type something else than expected: %d\n", + ramtype); + regb = 0; + } else { + regb = ramtype; + } v1 = 0xff; if(ivideo->haveXGIROM) { @@ -5500,7 +5560,10 @@ sisfb_post_xgi(struct pci_dev *pdev) } } - SiS_SetReg(SISSR, 0x17, 0x00); + if (regb == 1) + SiS_SetReg(SISSR, 0x17, 0x80); /* DDR2 */ + else + SiS_SetReg(SISSR, 0x17, 0x00); /* DDR1 */ SiS_SetReg(SISSR, 0x1a, 0x87); if(ivideo->chip == XGI_20) { @@ -5508,10 +5571,6 @@ sisfb_post_xgi(struct pci_dev *pdev) SiS_SetReg(SISSR, 0x1c, 0x00); } - ramtype = sisfb_post_xgi_ramtype(ivideo); - - regb = 0; /* ! */ - switch(ramtype) { case 0: sisfb_post_xgi_setclocks(ivideo, regb); |