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via686.c
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via686.c
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/*
* (C) Copyright 2002
* Hyperion Entertainment, Hans-JoergF@hyperion-entertainment.com
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <pci.h>
#include <ata.h>
#include "memio.h"
#include "articiaS.h"
#include "via686.h"
#include "i8259.h"
DECLARE_GLOBAL_DATA_PTR;
#undef VIA_DEBUG
#ifdef VIA_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
/* Setup the ISA-to-PCI host bridge */
void via_isa_init(pci_dev_t dev, struct pci_config_table *table)
{
char regval;
if (PCI_FUNC(dev) == 0)
{
PRINTF("... PCI-to-ISA bridge, dev=0x%X\n", dev);
/* Enable I/O Recovery time */
pci_write_config_byte(dev, 0x40, 0x08);
/* Enable ISA refresh */
pci_write_config_byte(dev, 0x41, 0x41); /* was 01 */
/* Enable ISA line buffer */
pci_write_config_byte(dev, 0x45, 0x80);
/* Gate INTR, and flush line buffer */
pci_write_config_byte(dev, 0x46, 0x60);
/* Enable EISA ports 4D0/4D1. Do we need this ? */
pci_write_config_byte(dev, 0x47, 0xe6); /* was 20 */
/* 512 K PCI Decode */
pci_write_config_byte(dev, 0x48, 0x01);
/* Wait for PGNT before grant to ISA Master/DMA */
/* ports 0-FF to SDBus */
/* IRQ 14 and 15 for ide 0/1 */
pci_write_config_byte(dev, 0x4a, 0x04); /* Was c4 */
/* Plug'n'Play */
/* Parallel DRQ 3, Floppy DRQ 2 (default) */
pci_write_config_byte(dev, 0x50, 0x0e);
/* IRQ Routing for Floppy and Parallel port */
/* IRQ 6 for floppy, IRQ 7 for parallel port */
pci_write_config_byte(dev, 0x51, 0x76);
/* IRQ Routing for serial ports (take IRQ 3 and 4) */
pci_write_config_byte(dev, 0x52, 0x34);
/* All IRQ's level triggered. */
pci_write_config_byte(dev, 0x54, 0x00);
/* PCI IRQ's all at IRQ 9 */
pci_write_config_byte(dev, 0x55, 0x90);
pci_write_config_byte(dev, 0x56, 0x99);
pci_write_config_byte(dev, 0x57, 0x90);
/* Enable Keyboard */
pci_read_config_byte(dev, 0x5A, ®val);
regval |= 0x01;
pci_write_config_byte(dev, 0x5A, regval);
pci_write_config_byte(dev, 0x80, 0);
pci_write_config_byte(dev, 0x85, 0x01);
/* pci_write_config_byte(dev, 0x77, 0x00); */
}
}
/*
* Initialize PNP irq routing
*/
void via_init_irq_routing(uint8 irq_map[])
{
char *s;
uint8 level_edge_bits = 0xf;
/* Set irq routings */
pci_write_cfg_byte(0, 7<<3, 0x55, irq_map[0]<<4);
pci_write_cfg_byte(0, 7<<3, 0x56, irq_map[1] | irq_map[2]<<4);
pci_write_cfg_byte(0, 7<<3, 0x57, irq_map[3]<<4);
/*
* Gather level/edge bits
* Default is to assume level triggered
*/
s = getenv("pci_irqa_select");
if (s && strcmp(s, "level") == 0)
level_edge_bits &= ~0x01;
s = getenv("pci_irqb_select");
if (s && strcmp(s, "level") == 0)
level_edge_bits &= ~0x02;
s = getenv("pci_irqc_select");
if (s && strcmp(s, "level") == 0)
level_edge_bits &= ~0x04;
s = getenv("pci_irqd_select");
if (s && strcmp(s, "level") == 0)
level_edge_bits &= ~0x08;
PRINTF("IRQ map\n");
PRINTF("%d: %s\n", irq_map[0], level_edge_bits&0x1 ? "edge" : "level");
PRINTF("%d: %s\n", irq_map[1], level_edge_bits&0x2 ? "edge" : "level");
PRINTF("%d: %s\n", irq_map[2], level_edge_bits&0x4 ? "edge" : "level");
PRINTF("%d: %s\n", irq_map[3], level_edge_bits&0x8 ? "edge" : "level");
pci_write_cfg_byte(0, 7<<3, 0x54, level_edge_bits);
PRINTF("%02x %02x %02x %02x\n", pci_read_cfg_byte(0, 7<<3, 0x54),
pci_read_cfg_byte(0, 7<<3, 0x55), pci_read_cfg_byte(0, 7<<3, 0x56),
pci_read_cfg_byte(0, 7<<3, 0x57));
}
/* Setup the IDE controller. This doesn't seem to work yet. I/O to an IDE controller port */
/* always return the last character output on the serial port (!) */
/* This function is called by the pnp-library when it encounters 0:7:1 */
void via_cfgfunc_ide_init(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table)
{
PRINTF("... IDE controller, dev=0x%X\n", dev);
/* Enable both IDE channels. */
pci_write_config_byte(dev, 0x40, 0x03);
/* udelay(10000); */
/* udelay(10000); */
/* Enable IO Space */
pci_write_config_word(dev, 0x04, 0x03);
/* Set to compatibility mode */
pci_write_config_byte(dev, 0x09, 0x8A); /* WAS: 0x8f); */
/* Set to legacy interrupt mode */
pci_write_config_byte(dev, 0x3d, 0x00); /* WAS: 0x01); */
}
/* Set the base address of the floppy controller to 0x3F0 */
void via_fdc_init(pci_dev_t dev)
{
unsigned char c;
/* Enable Configuration mode */
pci_read_config_byte(dev, 0x85, &c);
c |= 0x02;
pci_write_config_byte(dev, 0x85, c);
/* Set floppy controller port to 0x3F0. */
SIO_WRITE_CONFIG(0xE3, (0x3F<<2));
/* Enable floppy controller */
SIO_READ_CONFIG(0xE2, c);
c |= 0x10;
SIO_WRITE_CONFIG(0xE2, c);
/* Switch of configuration mode */
pci_read_config_byte(dev, 0x85, &c);
c &= ~0x02;
pci_write_config_byte(dev, 0x85, c);
}
/* Init function 0 of the via southbridge. Called by the pnp-library */
void via_cfgfunc_via686(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table)
{
if (PCI_FUNC(dev) == 0)
{
/* FIXME: Try to generate a PCI reset */
/* unsigned char c; */
/* pci_read_config_byte(dev, 0x47, &c); */
/* pci_write_config_byte(dev, 0x47, c | 0x01); */
via_isa_init(dev, table);
via_fdc_init(dev);
}
}
__asm__ (" .globl via_calibrate_time_base \n"
"via_calibrate_time_base: \n"
" lis 9, 0xfe00 \n"
" li 0, 0x00 \n"
" mttbu 0 \n"
" mttbl 0 \n"
"ctb_loop: \n"
" lbz 0, 0x61(9) \n"
" eieio \n"
" andi. 0, 0, 0x20 \n"
" beq ctb_loop \n"
"ctb_done: \n"
" mftb 3 \n"
" blr");
extern unsigned long via_calibrate_time_base(void);
void via_calibrate_bus_freq (void)
{
unsigned long tb;
/* This is 20 microseconds */
#define CALIBRATE_TIME 28636
/* Enable the timer (and disable speaker) */
unsigned char c;
c = in_byte (0x61);
out_byte (0x61, ((c & ~0x02) | 0x01));
/* Set timer 2 to low/high writing */
out_byte (0x43, 0xb0);
out_byte (0x42, CALIBRATE_TIME & 0xff);
out_byte (0x42, CALIBRATE_TIME >> 8);
/* Read the time base */
tb = via_calibrate_time_base ();
if (tb >= 700000)
gd->bus_clk = 133333333;
else
gd->bus_clk = 100000000;
}
void ide_led(uchar led, uchar status)
{
/* unsigned char c = in_byte(0x92); */
/* if (!status) */
/* out_byte(0x92, c | 0xC0); */
/* else */
/* out_byte(0x92, c & ~0xC0); */
}
void via_init_afterscan(void)
{
/* Modify IDE controller setup */
pci_write_cfg_byte(0, 7<<3|1, PCI_LATENCY_TIMER, 0x20);
pci_write_cfg_byte(0, 7<<3|1, PCI_COMMAND, PCI_COMMAND_IO|PCI_COMMAND_MEMORY|PCI_COMMAND_MASTER);
pci_write_cfg_byte(0, 7<<3|1, PCI_INTERRUPT_LINE, 0xff);
pci_write_cfg_byte(0, 7<<3|1, 0x40, 0x0b); /* FIXME: Might depend on drives connected */
pci_write_cfg_byte(0, 7<<3|1, 0x41, 0x42); /* FIXME: Might depend on drives connected */
pci_write_cfg_byte(0, 7<<3|1, 0x43, 0x05);
pci_write_cfg_byte(0, 7<<3|1, 0x44, 0x18);
pci_write_cfg_byte(0, 7<<3|1, 0x45, 0x10);
pci_write_cfg_byte(0, 7<<3|1, 0x4e, 0x22); /* FIXME: Not documented, but set in PC bios */
pci_write_cfg_byte(0, 7<<3|1, 0x4f, 0x20); /* FIXME: Not documented */
/* Modify some values in the USB controller */
pci_write_cfg_byte(0, 7<<3|2, 0x05, 0x17);
pci_write_cfg_byte(0, 7<<3|2, 0x06, 0x01);
pci_write_cfg_byte(0, 7<<3|2, 0x41, 0x12);
pci_write_cfg_byte(0, 7<<3|2, 0x42, 0x03);
pci_write_cfg_byte(0, 7<<3|2, PCI_LATENCY_TIMER, 0x40);
pci_write_cfg_byte(0, 7<<3|3, 0x05, 0x17);
pci_write_cfg_byte(0, 7<<3|3, 0x06, 0x01);
pci_write_cfg_byte(0, 7<<3|3, 0x41, 0x12);
pci_write_cfg_byte(0, 7<<3|3, 0x42, 0x03);
pci_write_cfg_byte(0, 7<<3|3, PCI_LATENCY_TIMER, 0x40);
}