[coreboot] [Patch] Flashrom: board enable for Soyo SY-6BA+III.
Luc Verhaegen
libv at skynet.be
Thu Jun 18 02:47:33 CEST 2009
Board enable for soyo sy-6ba+iii.
This board enable drops GPO26 on the southbridge (PIIX4). Since there
was another board raising GPO22 on the same southbridge, a general
routine was created reducing both board enables to a single line.
This routine does full gpo pin checking and filters out those which
are most likely in use already, enables dual-function gpo pins properly,
and then sets the relevant gpo line. It should be fully implemented for
all gpo setting on PIIX4, except when a supposed used gpo pin does happen
to be available for gpio.
The board itself predates proper subsystem id usage and can therefor not
be autodetected.
Signed-off-by: Luc Verhaegen <libv at skynet.be>
Index: board_enable.c
===================================================================
--- board_enable.c (revision 602)
+++ board_enable.c (working copy)
@@ -208,6 +208,78 @@
}
/**
+ * Helper function to raise/drop a given gpo line on intel PIIX4*
+ */
+static int intel_piix4_gpo_set(int gpo, int raise)
+{
+ struct pci_dev *dev;
+ uint32_t tmp, base;
+
+ dev = pci_dev_find(0x8086, 0x7110); /* Intel PIIX4 ISA bridge */
+ if (!dev) {
+ fprintf(stderr, "\nERROR: Intel PIIX4 ISA bridge not found.\n");
+ return -1;
+ }
+
+ /* sanity check */
+ if ((gpo < 0) || (gpo > 30)) {
+ fprintf(stderr, "\nERROR: Intel PIIX4 has no GPO%d.\n", gpo);
+ return -1;
+ }
+
+ /* these are dual function pins which are most likely in use already */
+ if (((gpo >= 1) && (gpo <= 7)) ||
+ ((gpo >= 9) && (gpo <= 21)) || (gpo == 29)) {
+ fprintf(stderr, "\nERROR: Unsupported PIIX4 GPO%d.\n", gpo);
+ return -1;
+ }
+
+ /* dual function that need special enable. */
+ if ((gpo >= 22) && (gpo <= 26)) {
+ tmp = pci_read_long(dev, 0xB0); /* GENCFG */
+ switch (gpo) {
+ case 22: /* XBUS: XDIR#/GPO22 */
+ case 23: /* XBUS: XOE#/GPO23 */
+ tmp |= 0x10000000;
+ break;
+ case 24: /* RTCSS#/GPO24 */
+ tmp |= 0x20000000;
+ break;
+ case 25: /* RTCALE/GPO25 */
+ tmp |= 0x40000000;
+ break;
+ case 26: /* KBCSS#/GPO26 */
+ tmp |= 0x80000000;
+ break;
+ default:
+ fprintf(stderr, "\nERROR: Unsupported PIIX4 GPO%d.\n", gpo);
+ return -1;
+ }
+ pci_write_long(dev, 0xB0, tmp);
+ }
+
+ /* GPO {0,8,27,28,30} are always available. */
+
+ dev = pci_dev_find(0x8086, 0x7113); /* Intel PIIX4 PM */
+ if (!dev) {
+ fprintf(stderr, "\nERROR: Intel PIIX4 PM not found.\n");
+ return -1;
+ }
+
+ /* PM IO base */
+ base = pci_read_long(dev, 0x40) & 0x0000FFC0;
+
+ tmp = INL(base + 0x34); /* GPO register */
+ if (raise)
+ tmp |= 0x01 << gpo;
+ else
+ tmp |= ~(0x01 << gpo);
+ OUTL(tmp, base + 0x34);
+
+ return 0;
+}
+
+/**
* Suited for VIAs EPIA M and MII, and maybe other CLE266 based EPIAs.
*
* We don't need to do this when using coreboot, GPIO15 is never lowered there.
@@ -413,18 +485,7 @@
*/
static int board_epox_ep_bx3(const char *name)
{
- uint8_t tmp;
-
- /* Raise GPIO22. */
- tmp = INB(0x4036);
- OUTB(tmp, 0xEB);
-
- tmp |= 0x40;
-
- OUTB(tmp, 0x4036);
- OUTB(tmp, 0xEB);
-
- return 0;
+ return intel_piix4_gpo_set(22, 1);
}
/**
@@ -661,6 +722,16 @@
}
/**
+ * Suited for Soyo SY-6BA+III: i440BX + PIIX4.
+ * Might also work on other SY-6BA+ variations, as there is no superio poking.
+ */
+static int board_soyo_sy_6ba_plus_iii(const char *name)
+{
+ return intel_piix4_gpo_set(26, 0);
+}
+
+
+/**
* Suited for Soyo SY-7VCA: Pro133A + VT82C686.
*/
static int board_soyo_sy_7vca(const char *name)
@@ -747,6 +818,7 @@
{0x1106, 0x0571, 0x1462, 0x7120, 0, 0, 0, 0, "msi", "kt4v", "MSI", "MS-6712 (KT4V)", board_msi_kt4v},
{0x13f6, 0x0111, 0x1462, 0x5900, 0x1106, 0x3177, 0x1106, 0, "msi", "kt4ultra", "MSI", "MS-6590 (KT4 Ultra)",board_msi_kt4v},
{0x8086, 0x2658, 0x1462, 0x7046, 0x1106, 0x3044, 0x1462, 0x046d, NULL, NULL, "MSI", "MS-7046", ich6_gpio19_raise},
+ {0x8086, 0x7190, 0, 0, 0x8086, 0x7110, 0, 0, "soyo", "sy-6ba+iii", "Soyo", "SY-6BA+III", board_soyo_sy_6ba_plus_iii},
{0x1106, 0x3038, 0x0925, 0x1234, 0x1106, 0x3058, 0x15DD, 0x7609, NULL, NULL, "Soyo", "SY-7VCA", board_soyo_sy_7vca},
{0x8086, 0x1076, 0x8086, 0x1176, 0x1106, 0x3059, 0x10f1, 0x2498, NULL, NULL, "Tyan", "S2498 (Tomcat K7M)", board_asus_a7v8x_mx},
{0x1106, 0x0314, 0x1106, 0xaa08, 0x1106, 0x3227, 0x1106, 0xAA08, NULL, NULL, "VIA", "EPIA-CN", board_via_epia_sp},
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