/* * (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 #include #include #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); }