[coreboot] [PATCH 4/7] ASUS M2V support (v2): VT8237A specific initialization
Tobias Diedrich
ranma+coreboot at tdiedrich.de
Wed Nov 3 19:24:54 CET 2010
Rudolf Marek wrote:
>> + if (!devfun7)
>> + return;
>> +
>> + /*
>> + * This init code is valid only for the VT8237A! For different
>> + * sounthbridges (e.g. VT8237S, VT8237R (without plus R)
>
> typo :) maybe was just copied? Did you get the values from orig bios? Or
> just copied? For what vlink mode it is 8x? I got some VIA recommended
> values but they are bit different 0xb5 is 0x88.
>
>> + /* FIXME: Intel needs more bit set for C2/C3. */
>> +
>> + /*
>> + * Allow SLP# signal to assert LDTSTOP_L.
>> + * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
>
> What is fixme fixme pre revA2?
>
>> + */
>> + outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
>> +
>> + dump_south(dev);
>> +}
>> +
>> static void vt8237s_init(struct device *dev)
>> {
>> u32 tmp;
>> @@ -541,7 +584,7 @@
>> .read_resources = vt8237r_read_resources,
>> .set_resources = pci_dev_set_resources,
>> .enable_resources = pci_dev_enable_resources,
>> - .init = vt8237r_init,
>> + .init = vt8237a_init,
>> .scan_bus = scan_static_bus,
>> };
>>
>
> Otherwise fine.
Updated patch:
This adds VT8237A specific VLINK/LPC init functions in vt8237_ctrl.c,
vt8237r_lpc.c and vt8237r_early_smbus.c
I ran some tests and apparently both the
| /* So the chip knows we are on AMD. */
| pci_write_config8(devctl, 0x7c, 0x7f);
and
| /*
| * Allow SLP# signal to assert LDTSTOP_L.
| * Will work for C3 and for FID/VID change.
| */
| outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
in vt8237r_early_smbus.c are needed on VT8237A, otherwise I get a (non-fatal)
fid/vid change error on boot.
While vt8237a_vlink_init() in vt8237_ctrl.c is a modified vt8237r_vlink_init(),
vt8237a_init() in vt8237r_lpc.c is a modified vt8237s_init().
Signed-off-by: Tobias Diedrich <ranma+coreboot at tdiedrich.de>
---
Index: src/southbridge/via/vt8237r/vt8237_ctrl.c
===================================================================
--- src/southbridge/via/vt8237r/vt8237_ctrl.c.orig 2010-11-03 15:23:19.000000000 +0100
+++ src/southbridge/via/vt8237r/vt8237_ctrl.c 2010-11-03 15:37:25.000000000 +0100
@@ -168,6 +168,75 @@
}
+static void vt8237a_vlink_init(struct device *dev)
+{
+ u8 reg;
+ device_t devfun7;
+
+ devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_K8T890CE_7, 0);
+ if (!devfun7)
+ devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_K8M890CE_7, 0);
+ if (!devfun7)
+ devfun7 = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_K8T890CF_7, 0);
+ /* No pairing NB was found. */
+ if (!devfun7)
+ return;
+
+ /*
+ * This init code is valid only for the VT8237A! For different
+ * sounthbridges (e.g. VT8237S, VT8237R and VT8251) a different
+ * init code is required.
+ *
+ * FIXME: This is based on vt8237r_vlink_init() in
+ * k8t890/k8t890_ctrl.c and modified to fit what the AMI
+ * BIOS on my M2V wrote to these registers (by looking
+ * at lspci -nxxx output).
+ * Works for me.
+ */
+
+ /* disable auto disconnect */
+ reg = pci_read_config8(devfun7, 0x42);
+ reg &= ~0x4;
+ pci_write_config8(devfun7, 0x42, reg);
+
+ /* NB part setup */
+ pci_write_config8(devfun7, 0xb5, 0x88);
+ pci_write_config8(devfun7, 0xb6, 0x88);
+ pci_write_config8(devfun7, 0xb7, 0x61);
+
+ reg = pci_read_config8(devfun7, 0xb4);
+ reg |= 0x11;
+ pci_write_config8(devfun7, 0xb4, reg);
+
+ pci_write_config8(devfun7, 0xb0, 0x6);
+ pci_write_config8(devfun7, 0xb1, 0x1);
+
+ /* SB part setup */
+ pci_write_config8(dev, 0xb7, 0x50);
+ pci_write_config8(dev, 0xb9, 0x88);
+ pci_write_config8(dev, 0xba, 0x8a);
+ pci_write_config8(dev, 0xbb, 0x88);
+
+ reg = pci_read_config8(dev, 0xbd);
+ reg |= 0x3;
+ reg &= ~0x4;
+ pci_write_config8(dev, 0xbd, reg);
+
+ reg = pci_read_config8(dev, 0xbc);
+ reg &= ~0x7;
+ pci_write_config8(dev, 0xbc, reg);
+
+ pci_write_config8(dev, 0x48, 0x23);
+
+ /* enable auto disconnect, for STPGNT and HALT */
+ reg = pci_read_config8(devfun7, 0x42);
+ reg |= 0x7;
+ pci_write_config8(devfun7, 0x42, reg);
+}
+
static void ctrl_enable(struct device *dev)
{
/* Enable the 0:13 and 0:13.1. */
@@ -193,6 +262,12 @@
vt8237s_vlink_init(dev);
}
+ devsb = dev_find_device(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_VT8237A_LPC, 0);
+ if (devsb) {
+ vt8237a_vlink_init(dev);
+ }
+
/* Configure PCI1 and copy mirror registers from D0F3. */
vt8237_cfg(dev);
dump_south(dev);
Index: src/southbridge/via/vt8237r/vt8237r_lpc.c
===================================================================
--- src/southbridge/via/vt8237r/vt8237r_lpc.c.orig 2010-11-03 15:23:19.000000000 +0100
+++ src/southbridge/via/vt8237r/vt8237r_lpc.c 2010-11-03 15:50:51.000000000 +0100
@@ -319,6 +319,55 @@
printk(BIOS_SPEW, "Leaving %s.\n", __func__);
}
+static void vt8237a_init(struct device *dev)
+{
+ /*
+ * FIXME: This is based on vt8237s_init() and the values the AMI
+ * BIOS on my M2V wrote to these registers (by loking
+ * at lspci -nxxx output).
+ * Works for me.
+ */
+ u32 tmp;
+
+ /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
+ tmp = pci_read_config8(dev, 0x4f);
+ tmp |= 0x08;
+ pci_write_config8(dev, 0x4f, tmp);
+
+ /*
+ * bit2: REQ5 as PCI request input - should be together with INTE-INTH.
+ * bit5: usb power control lines as gpio
+ */
+ pci_write_config8(dev, 0xe4, 0x24);
+ /*
+ * Enable APIC wakeup from INTH
+ * Enable SATA LED, disable special CPU Frequency Change -
+ * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
+ */
+ pci_write_config8(dev, 0xe5, 0x69);
+
+ /* Reduce further the STPCLK/LDTSTP signal to 5us. */
+ pci_write_config8(dev, 0xec, 0x4);
+
+ /* Host Bus Power Management Control, maybe not needed */
+ pci_write_config8(dev, 0x8c, 0x5);
+
+ /* Enable HPET at VT8237R_HPET_ADDR. */
+ pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
+
+ southbridge_init_common(dev);
+
+ /* FIXME: Intel needs more bit set for C2/C3. */
+
+ /*
+ * Allow SLP# signal to assert LDTSTOP_L.
+ * Will work for C3 and for FID/VID change.
+ */
+ outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
+
+ dump_south(dev);
+}
+
static void vt8237s_init(struct device *dev)
{
u32 tmp;
@@ -537,6 +586,14 @@
.scan_bus = scan_static_bus,
};
+static const struct device_operations vt8237r_lpc_ops_a = {
+ .read_resources = vt8237r_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = vt8237a_init,
+ .scan_bus = scan_static_bus,
+};
+
static const struct pci_driver lpc_driver_r __pci_driver = {
.ops = &vt8237r_lpc_ops_r,
.vendor = PCI_VENDOR_ID_VIA,
@@ -544,7 +601,7 @@
};
static const struct pci_driver lpc_driver_a __pci_driver = {
- .ops = &vt8237r_lpc_ops_r,
+ .ops = &vt8237r_lpc_ops_a,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_VT8237A_LPC,
};
Index: src/southbridge/via/vt8237r/vt8237r_early_smbus.c
===================================================================
--- src/southbridge/via/vt8237r/vt8237r_early_smbus.c.orig 2010-11-03 15:23:19.000000000 +0100
+++ src/southbridge/via/vt8237r/vt8237r_early_smbus.c 2010-11-03 15:23:22.000000000 +0100
@@ -257,19 +257,30 @@
return;
devid = pci_read_config16(dev, PCI_DEVICE_ID);
- if (devid == PCI_DEVICE_ID_VIA_VT8237S_LPC) {
- devctl = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
- PCI_DEVICE_ID_VIA_VT8237_VLINK), 0);
- if (devctl == PCI_DEV_INVALID)
- return;
+ /* generic setup */
+
+ /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
+ pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
+
+ /* Enable ACPI accessm RTC signal gated with PSON. */
+ pci_write_config8(dev, 0x81, 0x84);
+
+ /* chipset-specific parts */
- /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
- pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
+ /* VLINK: FIXME: can we drop the devid check and just look for the VLINK device? */
+ if (devid == PCI_DEVICE_ID_VIA_VT8237S_LPC ||
+ devid == PCI_DEVICE_ID_VIA_VT8237A_LPC) {
+ devctl = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
+ PCI_DEVICE_ID_VIA_VT8237_VLINK), 0);
- /* Enable ACPI accessm RTC signal gated with PSON. */
- pci_write_config8(dev, 0x81, 0x84);
+ if (devctl != PCI_DEV_INVALID) {
+ /* So the chip knows we are on AMD. */
+ pci_write_config8(devctl, 0x7c, 0x7f);
+ }
+ }
+ if (devid == PCI_DEVICE_ID_VIA_VT8237S_LPC) {
/*
* Allow SLP# signal to assert LDTSTOP_L.
* Will work for C3 and for FID/VID change.
@@ -280,17 +291,10 @@
/* Reduce further the STPCLK/LDTSTP signal to 5us. */
pci_write_config8(dev, 0xec, 0x4);
- /* So the chip knows we are on AMD. */
- pci_write_config8(devctl, 0x7c, 0x7f);
-
return;
}
- /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
- pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
-
- /* Enable ACPI accessm RTC signal gated with PSON. */
- pci_write_config8(dev, 0x81, 0x84);
+ /* VT8237R and VT8237A */
/*
* Allow SLP# signal to assert LDTSTOP_L.
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