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Fix ROM decoding on VIA VT82C596 and VT82C686A/B

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These support an additional bit which we did not turn on yet.
Without this patch they decode up to 512 kB, with this up to 1 MB.

Disentangle the enables of unrelated but mostly compatible chipsets
too, add some more debug output and set the max_rom_decode limits.
Also, make warnings really only warnings.

Corresponding to flashrom svn r1739.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
This commit is contained in:
Stefan Tauner 2013-09-12 08:38:23 +00:00
parent beaffd8859
commit 6c67f1c128
1 changed files with 43 additions and 13 deletions
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56
chipset_enable.c
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@ -884,22 +884,29 @@ static int enable_flash_sc1100(struct pci_dev *dev, const char *name)
return 0;
}
/* Works for AMD-8111, VIA VT82C586A/B, VIA VT82C686A/B. */
static int enable_flash_amd8111(struct pci_dev *dev, const char *name)
/* Works for AMD-768, AMD-8111, VIA VT82C586A/B, VIA VT82C596, VIA VT82C686A/B.
*
* ROM decode control register matrix
* AMD-768 AMD-8111 VT82C586A/B VT82C596 VT82C686A/B
* 7 FFC0_0000h–FFFF_FFFFh <- FFFE0000h-FFFEFFFFh <- <-
* 6 FFB0_0000h–FFBF_FFFFh <- FFF80000h-FFFDFFFFh <- <-
* 5 00E8... <- <- FFF00000h-FFF7FFFFh <-
*/
static int enable_flash_amd_via(struct pci_dev *dev, const char *name, uint8_t decode_val)
{
#define AMD_MAPREG 0x43
#define AMD_ENREG 0x40
uint8_t old, new;
/* Enable decoding at 0xffb00000 to 0xffffffff. */
old = pci_read_byte(dev, AMD_MAPREG);
new = old | 0xC0;
new = old | decode_val;
if (new != old) {
rpci_write_byte(dev, AMD_MAPREG, new);
if (pci_read_byte(dev, AMD_MAPREG) != new) {
msg_pinfo("Setting register 0x%x to 0x%02x on %s failed (WARNING ONLY).\n",
msg_pwarn("Setting register 0x%x to 0x%02x on %s failed (WARNING ONLY).\n",
AMD_MAPREG, new, name);
}
} else
msg_pdbg("Changed ROM decode range to 0x%02x successfully.\n", new);
}
/* Enable 'ROM write' bit. */
@ -910,14 +917,37 @@ static int enable_flash_amd8111(struct pci_dev *dev, const char *name)
rpci_write_byte(dev, AMD_ENREG, new);
if (pci_read_byte(dev, AMD_ENREG) != new) {
msg_pinfo("Setting register 0x%x to 0x%02x on %s failed (WARNING ONLY).\n",
msg_pwarn("Setting register 0x%x to 0x%02x on %s failed (WARNING ONLY).\n",
AMD_ENREG, new, name);
return -1;
return ERROR_NONFATAL;
}
msg_pdbg2("Set ROM enable bit successfully.\n");
return 0;
}
static int enable_flash_amd_768_8111(struct pci_dev *dev, const char *name)
{
/* Enable decoding of 0xFFB00000 to 0xFFFFFFFF (5 MB). */
max_rom_decode.lpc = 5 * 1024 * 1024;
return enable_flash_amd_via(dev, name, 0xC0);
}
static int enable_flash_vt82c586(struct pci_dev *dev, const char *name)
{
/* Enable decoding of 0xFFF80000 to 0xFFFFFFFF. (512 kB) */
max_rom_decode.parallel = 512 * 1024;
return enable_flash_amd_via(dev, name, 0xC0);
}
/* Works for VT82C686A/B too. */
static int enable_flash_vt82c596(struct pci_dev *dev, const char *name)
{
/* Enable decoding of 0xFFF80000 to 0xFFFFFFFF. (1 MB) */
max_rom_decode.parallel = 1024 * 1024;
return enable_flash_amd_via(dev, name, 0xE0);
}
static int enable_flash_sb600(struct pci_dev *dev, const char *name)
{
uint32_t prot;
@ -1304,8 +1334,8 @@ const struct penable chipset_enables[] = {
{0x1022, 0x2080, OK, "AMD", "CS5536", enable_flash_cs5536},
{0x1022, 0x2090, OK, "AMD", "CS5536", enable_flash_cs5536},
{0x1022, 0x3000, OK, "AMD", "Elan SC520", get_flashbase_sc520},
{0x1022, 0x7440, OK, "AMD", "AMD-768", enable_flash_amd8111},
{0x1022, 0x7468, OK, "AMD", "AMD8111", enable_flash_amd8111},
{0x1022, 0x7440, OK, "AMD", "AMD-768", enable_flash_amd_768_8111},
{0x1022, 0x7468, OK, "AMD", "AMD-8111", enable_flash_amd_768_8111},
{0x1022, 0x780e, OK, "AMD", "FCH", enable_flash_sb600},
{0x1039, 0x0406, NT, "SiS", "501/5101/5501", enable_flash_sis501},
{0x1039, 0x0496, NT, "SiS", "85C496+497", enable_flash_sis85c496},
@ -1390,9 +1420,9 @@ const struct penable chipset_enables[] = {
{0x1106, 0x0691, OK, "VIA", "VT82C69x", via_no_byte_merge},
{0x1106, 0x8601, NT, "VIA", "VT8601T", via_no_byte_merge},
/* VIA southbridges */
{0x1106, 0x0586, OK, "VIA", "VT82C586A/B", enable_flash_amd8111},
{0x1106, 0x0596, OK, "VIA", "VT82C596", enable_flash_amd8111},
{0x1106, 0x0686, OK, "VIA", "VT82C686A/B", enable_flash_amd8111},
{0x1106, 0x0586, OK, "VIA", "VT82C586A/B", enable_flash_vt82c586},
{0x1106, 0x0596, OK, "VIA", "VT82C596", enable_flash_vt82c596},
{0x1106, 0x0686, OK, "VIA", "VT82C686A/B", enable_flash_vt82c596},
{0x1106, 0x3074, OK, "VIA", "VT8233", enable_flash_vt823x},
{0x1106, 0x3147, OK, "VIA", "VT8233A", enable_flash_vt823x},
{0x1106, 0x3177, OK, "VIA", "VT8235", enable_flash_vt823x},