diff options
Diffstat (limited to 'board/MAI/AmigaOneG3SE/via686.c')
-rw-r--r-- | board/MAI/AmigaOneG3SE/via686.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/board/MAI/AmigaOneG3SE/via686.c b/board/MAI/AmigaOneG3SE/via686.c new file mode 100644 index 0000000..0483ca9 --- /dev/null +++ b/board/MAI/AmigaOneG3SE/via686.c @@ -0,0 +1,299 @@ +/* + * (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" + +#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) +{ + DECLARE_GLOBAL_DATA_PTR; + + 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); + + +} |