Chipset/Board: vt8237: Set All mem cycles to LPC in chipset enable

Only done for VT8237R (possibly needed for VT8237 too), VT8235 does
not need this (even if the original bios does so: Asus A7V8X-MX SE,
MSI KT4V were verified).

This then opens a floodgate of cleanups in the board enables.
* EPIA SP board enable vanishes, taking EPIA CN match with it.
* Asus A7V8X-MX/Tyan S2498 board enable then equals
  w836xx_memw_enable_2e
* AOpen vKM400Am-S board enable then equals it8705_rom_write_enable
* Epia M board enable becomes via_vt823x_gpio15_raise
* Epia N board enable becomes via_vt823x_gpio9_raise
* Asus M2V-MX board enable becomes via_vt823x_gpio5_raise
* vt823x_gpio_set becomes via_vt823x_gpio_set, and now detects ISA
  bridge itself, in concordance with intel ich and nvidia mcp gpio.

Corresponding to flashrom svn r815.

Signed-off-by: Luc Verhaegen <libv@skynet.be>
Acked-by: Sean Nelson <audiohacked@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/chipset_enable.c b/chipset_enable.c
index f618a37..729706d 100644
--- a/chipset_enable.c
+++ b/chipset_enable.c
@@ -667,6 +667,13 @@ static int enable_flash_vt823x(struct pci_dev *dev, const char *name)
 		return -1;
 	}
 
+	if (dev->device_id == 0x3227) { /* VT8237R */
+	    /* All memory cycles, not just ROM ones, go to LPC. */
+	    val = pci_read_byte(dev, 0x59);
+	    val &= ~0x80;
+	    pci_write_byte(dev, 0x59, val);
+	}
+
 	return 0;
 }