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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007, 2008 Rudolf Marek <r.marek@assembler.cz>
* Copyright (C) 2009 Jon Harrison <bothlyn@blueyonder.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* Inspiration from other VIA SB code. */
#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <pc80/mc146818rtc.h>
#include <arch/ioapic.h>
#include <cpu/x86/lapic.h>
#include <pc80/keyboard.h>
#include <pc80/i8259.h>
#include <stdlib.h>
#include "vt8237r.h"
#include "chip.h"
static void southbridge_init_common(struct device *dev);
#if CONFIG_EPIA_VT8237R_INIT
/* Interrupts for INT# A B C D */
static const unsigned char pciIrqs[4] = { 10, 11, 12, 0};
/* Interrupt Assignments for Pins 1 2 3 4 */
static const unsigned char sataPins[4] = { 'A','B','C','D'};
static const unsigned char vgaPins[4] = { 'A','B','C','D'};
static const unsigned char usbPins[4] = { 'A','B','C','D'};
static const unsigned char enetPins[4] = { 'A','B','C','D'};
static const unsigned char vt8237Pins[4] = { 'A','B','C','D'};
static const unsigned char slotPins[4] = { 'C','D','A','B'};
static const unsigned char riserPins[4] = { 'D','C','B','A'};
static unsigned char *pin_to_irq(const unsigned char *pin)
{
static unsigned char Irqs[4];
int i;
for (i = 0 ; i < 4 ; i++)
Irqs[i] = pciIrqs[ pin[i] - 'A' ];
return Irqs;
}
#endif
/** Set up PCI IRQ routing, route everything through APIC. */
static void pci_routing_fixup(struct device *dev)
{
#if CONFIG_EPIA_VT8237R_INIT
device_t pdev;
u8 reg;
#endif
/* PCI PNP Interrupt Routing INTE/F - disable */
pci_write_config8(dev, 0x44, 0x00);
/* PCI PNP Interrupt Routing INTG/H - disable */
pci_write_config8(dev, 0x45, 0x00);
/* Gate Interrupts until RAM Writes are flushed */
pci_write_config8(dev, 0x49, 0x20);
#if CONFIG_EPIA_VT8237R_INIT
/* Share INTE-INTH with INTA-INTD as per stock BIOS. */
pci_write_config8(dev, 0x46, 0x00);
/* setup PCI IRQ routing (For PCI Slot)*/
pci_write_config8(dev, 0x55, pciIrqs[0] << 4);
pci_write_config8(dev, 0x56, pciIrqs[1] | (pciIrqs[2] << 4) );
pci_write_config8(dev, 0x57, pciIrqs[3] << 4);
/* PCI Routing Fixup */
//Setup MiniPCI Slot
pci_assign_irqs(0, 0x14, pin_to_irq(slotPins));
// Via 2 slot riser card 2nd slot
pci_assign_irqs(0, 0x13, pin_to_irq(riserPins));
//Setup USB
pci_assign_irqs(0, 0x10, pin_to_irq(usbPins));
//Setup VT8237R Sound
pci_assign_irqs(0, 0x11, pin_to_irq(vt8237Pins));
//Setup Ethernet
pci_assign_irqs(0, 0x12, pin_to_irq(enetPins));
//Setup VGA
pci_assign_irqs(1, 0x00, pin_to_irq(vgaPins));
/* APIC Routing Fixup */
// Setup SATA
pdev = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VT6420_SATA, 0);
pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x02);
pci_assign_irqs(0, 0x0f, pin_to_irq(sataPins));
// Setup PATA Override
pdev = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_1, 0);
pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x01);
pci_write_config8(pdev, PCI_INTERRUPT_LINE, 0xFF);
#else
/* Route INTE-INTH through registers above, no map to INTA-INTD. */
pci_write_config8(dev, 0x46, 0x10);
/* PCI Interrupt Polarity */
pci_write_config8(dev, 0x54, 0x00);
/* PCI INTA# Routing */
pci_write_config8(dev, 0x55, 0x00);
/* PCI INTB#/C# Routing */
pci_write_config8(dev, 0x56, 0x00);
/* PCI INTD# Routing */
pci_write_config8(dev, 0x57, 0x00);
#endif
}
/**
* Set up the power management capabilities directly into ACPI mode.
* This avoids having to handle any System Management Interrupts (SMIs).
*/
extern u8 acpi_slp_type;
static void setup_pm(device_t dev)
{
u16 tmp;
/* Debounce LID and PWRBTN# Inputs for 16ms. */
pci_write_config8(dev, 0x80, 0x20);
/* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
/* Set ACPI to 9, must set IRQ 9 override to level! Set PSON gating. */
pci_write_config8(dev, 0x82, 0x40 | VT8237R_ACPI_IRQ);
#if CONFIG_EPIA_VT8237R_INIT
/* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
pci_write_config16(dev, 0x84, 0x3052);
#else
/* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
pci_write_config16(dev, 0x84, 0x30b2);
#endif
/* SMI output level to low, 7.5us throttle clock */
pci_write_config8(dev, 0x8d, 0x18);
/* GP Timer Control 1s */
pci_write_config8(dev, 0x93, 0x88);
/*
* 7 = SMBus clock from RTC 32.768KHz
* 5 = Internal PLL reset from susp disabled
* 2 = GPO2 is SUSA#
*/
pci_write_config8(dev, 0x94, 0xa0);
/*
* 7 = stp to sust delay 1msec
* 6 = SUSST# Deasserted Before PWRGD for STD
* 5 = Keyboard/Mouse Swap
* 4 = PWRGOOD reset on VT8237A/S
* 3 = GPO26/GPO27 is GPO
* 2 = Disable Alert on Lan
* 1 = SUSCLK/GPO4
* 0 = USB Wakeup
*/
#if CONFIG_EPIA_VT8237R_INIT
pci_write_config8(dev, 0x95, 0xc2);
#else
pci_write_config8(dev, 0x95, 0xcc);
#endif
/* Disable GP3 timer. */
pci_write_config8(dev, 0x98, 0);
/* Enable ACPI accessm RTC signal gated with PSON. */
pci_write_config8(dev, 0x81, 0x84);
/* Clear status events. */
outw(0xffff, VT8237R_ACPI_IO_BASE + 0x00);
outw(0xffff, VT8237R_ACPI_IO_BASE + 0x20);
outw(0xffff, VT8237R_ACPI_IO_BASE + 0x28);
outl(0xffffffff, VT8237R_ACPI_IO_BASE + 0x30);
/* Disable SCI on GPIO. */
outw(0x0, VT8237R_ACPI_IO_BASE + 0x22);
/* Disable SMI on GPIO. */
outw(0x0, VT8237R_ACPI_IO_BASE + 0x24);
/* Disable all global enable SMIs. */
outw(0x0, VT8237R_ACPI_IO_BASE + 0x2a);
/* All SMI off, both IDE buses ON, PSON rising edge. */
outw(0x0, VT8237R_ACPI_IO_BASE + 0x2c);
/* Primary activity SMI disable. */
outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
/* GP timer reload on none. */
outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
/* Disable extended IO traps. */
outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
/* SCI is generated for RTC/pwrBtn/slpBtn. */
tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
#if CONFIG_HAVE_ACPI_RESUME == 1
acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
printk(BIOS_DEBUG, "SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
#endif
/* clear sleep */
tmp &= ~(7 << 10);
tmp |= 1;
outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
}
static void vt8237r_init(struct device *dev)
{
u8 enables;
#if CONFIG_EPIA_VT8237R_INIT
printk(BIOS_SPEW, "Entering vt8237r_init, for EPIA.\n");
/*
* TODO: Looks like stock BIOS can do this but causes a hang
* Enable SATA LED, disable special CPU Frequency Change -
* GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
* Setup to match EPIA default
* PCS0# on Pin U1
*/
enables = pci_read_config8(dev, 0xe5);
enables |= 0x23;
pci_write_config8(dev, 0xe5, enables);
/*
* Enable Flash Write Access.
* Note EPIA-N Does not use REQ5 or PCISTP#(Hang)
*/
enables = pci_read_config8(dev, 0xe4);
enables |= 0x2B;
pci_write_config8(dev, 0xe4, enables);
/* Enables Extra RTC Ports */
enables = pci_read_config8(dev, 0x4E);
enables |= 0x80;
pci_write_config8(dev, 0x4E, enables);
#else
printk(BIOS_SPEW, "Entering vt8237r_init.\n");
/*
* Enable SATA LED, disable special CPU Frequency Change -
* GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
*/
pci_write_config8(dev, 0xe5, 0x09);
/* REQ5 as PCI request input - should be together with INTE-INTH. */
pci_write_config8(dev, 0xe4, 0x4);
#endif
/* Set bit 3 of 0x4f (use INIT# as CPU reset). */
enables = pci_read_config8(dev, 0x4f);
enables |= 0x08;
pci_write_config8(dev, 0x4f, enables);
#if CONFIG_EPIA_VT8237R_INIT
/*
* Set Read Pass Write Control Enable
*/
pci_write_config8(dev, 0x48, 0x0c);
#else
/*
* Set Read Pass Write Control Enable
* (force A2 from APIC FSB to low).
*/
pci_write_config8(dev, 0x48, 0x8c);
#endif
southbridge_init_common(dev);
#if !CONFIG_EPIA_VT8237R_INIT
/* 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);
#endif
printk(BIOS_SPEW, "Leaving %s.\n", __func__);
}
static void vt8237s_init(struct device *dev)
{
u32 tmp;
/* Put SPI base VT8237S_SPI_MEM_BASE. */
tmp = pci_read_config32(dev, 0xbc);
pci_write_config32(dev, 0xbc,
(VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
/*
* REQ5 as PCI request input - should be together with INTE-INTH.
*/
pci_write_config8(dev, 0xe4, 0x04);
/* 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., does not work correctly on R. */
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. FIXME FIXME, pre rev A2.
*/
outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
dump_south(dev);
}
static void vt8237_common_init(struct device *dev)
{
u8 enables, byte;
/* Enable addr/data stepping. */
byte = pci_read_config8(dev, PCI_COMMAND);
byte |= PCI_COMMAND_WAIT;
pci_write_config8(dev, PCI_COMMAND, byte);
/* EPIA-N(L) Uses CN400 for BIOS Access */
#if !CONFIG_EPIA_VT8237R_INIT
/* Enable the internal I/O decode. */
enables = pci_read_config8(dev, 0x6C);
enables |= 0x80;
pci_write_config8(dev, 0x6C, enables);
/*
* ROM decode
* bit range
* 7 000E0000h-000EFFFFh
* 6 FFF00000h-FFF7FFFFh
* 5 FFE80000h-FFEFFFFFh
* 4 FFE00000h-FFE7FFFFh
* 3 FFD80000h-FFDFFFFFh
* 2 FFD00000h-FFD7FFFFh
* 1 FFC80000h-FFCFFFFFh
* 0 FFC00000h-FFC7FFFFh
* So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
*/
pci_write_config8(dev, 0x41, 0x7f);
#endif
/*
* Set bit 6 of 0x40 (I/O recovery time).
* IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
* that PCI interrupts can be properly marked as level triggered.
*/
enables = pci_read_config8(dev, 0x40);
enables |= 0x44;
pci_write_config8(dev, 0x40, enables);
/* Line buffer control */
enables = pci_read_config8(dev, 0x42);
enables |= 0xf8;
pci_write_config8(dev, 0x42, enables);
/* Delay transaction control */
pci_write_config8(dev, 0x43, 0xb);
#if CONFIG_EPIA_VT8237R_INIT
/* I/O recovery time, default IDE routing */
pci_write_config8(dev, 0x4c, 0x04);
/* ROM memory cycles go to LPC. */
pci_write_config8(dev, 0x59, 0x80);
/*
* Bit | Meaning
* -------------
* 3 | Bypass APIC De-Assert Message (1=Enable)
* 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
* | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
* 0 | Dynamic Clock Gating Main Switch (1=Enable)
*/
pci_write_config8(dev, 0x5b, 0x9);
/* Set 0x58 to 0x42 APIC On and RTC Write Protect.*/
pci_write_config8(dev, 0x58, 0x42);
/* Enable serial IRQ, 6PCI clocks. */
pci_write_config8(dev, 0x52, 0x9);
#else
/* I/O recovery time, default IDE routing */
pci_write_config8(dev, 0x4c, 0x44);
/* ROM memory cycles go to LPC. */
pci_write_config8(dev, 0x59, 0x80);
/*
* Bit | Meaning
* -------------
* 3 | Bypass APIC De-Assert Message (1=Enable)
* 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
* | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
* 0 | Dynamic Clock Gating Main Switch (1=Enable)
*/
pci_write_config8(dev, 0x5b, 0xb);
/* Set 0x58 to 0x43 APIC and RTC. */
pci_write_config8(dev, 0x58, 0x43);
/* Enable serial IRQ, 6PCI clocks. */
pci_write_config8(dev, 0x52, 0x9);
#endif
/* Power management setup */
setup_pm(dev);
/* Start the RTC. */
rtc_init(0);
}
static void vt8237r_read_resources(device_t dev)
{
struct resource *res;
pci_dev_read_resources(dev);
/* Fixed ACPI Base IO Base*/
res = new_resource(dev, 0x88);
res->base = VT8237R_ACPI_IO_BASE;
res->size = 128;
res->limit = 0xffffUL;
res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
IORESOURCE_STORED | IORESOURCE_ASSIGNED;
/* Fixed EISA ECLR I/O Regs */
res = new_resource(dev, 3);
res->base = 0x4d0;
res->size = 2;
res->limit = 0xffffUL;
res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
IORESOURCE_STORED | IORESOURCE_ASSIGNED;
/* Fixed System Management Bus I/O Resource */
res = new_resource(dev, 0xD0);
res->base = VT8237R_SMBUS_IO_BASE;
res->size = 16;
res->limit = 0xffffUL;
res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
IORESOURCE_STORED | IORESOURCE_ASSIGNED;
/* Fixed APIC resource */
res = new_resource(dev, 0x44);
res->base = VT8237R_APIC_BASE;
res->size = 256;
res->limit = 0xffffffffUL;
res->align = 8;
res->gran = 8;
res->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
IORESOURCE_STORED | IORESOURCE_ASSIGNED;
res = new_resource(dev, 1);
res->base = 0x0UL;
res->size = 0x1000UL;
res->limit = 0xffffUL;
res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
}
/**
* The VT8237R is not a PCI bridge and has no resources of its own (other
* than standard PC I/O addresses), however it does control the ISA bus
* and so we need to manually call enable childrens resources on that bus.
*/
static void vt8237r_enable_resources(device_t dev)
{
pci_dev_enable_resources(dev);
enable_childrens_resources(dev);
}
static void init_keyboard(struct device *dev)
{
u8 regval = pci_read_config8(dev, 0x51);
if (regval & 0x1)
pc_keyboard_init(0);
}
static void southbridge_init_common(struct device *dev)
{
vt8237_common_init(dev);
pci_routing_fixup(dev);
setup_ioapic(VT8237R_APIC_BASE, VT8237R_APIC_ID);
setup_i8259();
init_keyboard(dev);
}
static const struct device_operations vt8237r_lpc_ops_s = {
.read_resources = vt8237r_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = vt8237r_enable_resources,
.init = &vt8237s_init,
.scan_bus = scan_static_bus,
};
static const struct device_operations vt8237r_lpc_ops_r = {
.read_resources = vt8237r_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = vt8237r_enable_resources,
.init = &vt8237r_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,
.device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
};
static const struct pci_driver lpc_driver_s __pci_driver = {
.ops = &vt8237r_lpc_ops_s,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_VT8237S_LPC,
};
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