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Diffstat (limited to 'board/MAI/AmigaOneG3SE/via686.c')
-rwxr-xr-xboard/MAI/AmigaOneG3SE/via686.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/board/MAI/AmigaOneG3SE/via686.c b/board/MAI/AmigaOneG3SE/via686.c
new file mode 100755
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+++ b/board/MAI/AmigaOneG3SE/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"
+
+#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, &regval);
+ 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);
+
+
+}
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