patch-2.3.1 linux/drivers/block/buddha.c

• Lines: 162
• Date: Thu May 13 11:04:54 1999
• Orig file: v2.3.0/linux/drivers/block/buddha.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.0/linux/drivers/block/buddha.c linux/drivers/block/buddha.c
@@ -0,0 +1,161 @@
+/*
+ *  linux/drivers/block/buddha.c -- Amiga Buddha and Catweasel IDE Driver
+ *
+ *	Copyright (C) 1997 by Geert Uytterhoeven
+ *
+ *  This driver was written by based on the specifications in README.buddha.
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ *
+ *  TODO:
+ *    - test it :-)
+ *    - tune the timings using the speed-register
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+#include <linux/zorro.h>
+#include <linux/ide.h>
+
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+
+
+    /*
+     *  The Buddha has 2 IDE interfaces, the Catweasel has 3
+     */
+
+#define BUDDHA_NUM_HWIFS	2
+#define CATWEASEL_NUM_HWIFS	3
+
+
+    /*
+     *  Bases of the IDE interfaces (relative to the board address)
+     */
+
+#define BUDDHA_BASE1	0x800
+#define BUDDHA_BASE2	0xa00
+#define BUDDHA_BASE3	0xc00
+
+static const u_int buddha_bases[CATWEASEL_NUM_HWIFS] = {
+    BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
+};
+
+
+    /*
+     *  Offsets from one of the above bases
+     */
+
+#define BUDDHA_DATA	0x00
+#define BUDDHA_ERROR	0x06		/* see err-bits */
+#define BUDDHA_NSECTOR	0x0a		/* nr of sectors to read/write */
+#define BUDDHA_SECTOR	0x0e		/* starting sector */
+#define BUDDHA_LCYL	0x12		/* starting cylinder */
+#define BUDDHA_HCYL	0x16		/* high byte of starting cyl */
+#define BUDDHA_SELECT	0x1a		/* 101dhhhh , d=drive, hhhh=head */
+#define BUDDHA_STATUS	0x1e		/* see status-bits */
+#define BUDDHA_CONTROL	0x11a
+
+static int buddha_offsets[IDE_NR_PORTS] = {
+    BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
+    BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL
+};
+
+
+    /*
+     *  Other registers
+     */
+
+#define BUDDHA_IRQ1	0xf00		/* MSB = 1, Harddisk is source of */
+#define BUDDHA_IRQ2	0xf40		/* interrupt */
+#define BUDDHA_IRQ3	0xf80
+
+static const int buddha_irqports[CATWEASEL_NUM_HWIFS] = {
+    BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
+};
+
+#define BUDDHA_IRQ_MR	0xfc0		/* master interrupt enable */
+
+
+    /*
+     *  Board information
+     */
+
+static u_long buddha_board = 0;
+static int buddha_num_hwifs = -1;
+
+
+    /*
+     *  Check and acknowledge the interrupt status
+     */
+
+static int buddha_ack_intr(ide_hwif_t *hwif)
+{
+    unsigned char ch;
+
+    ch = inb(hwif->io_ports[IDE_IRQ_OFFSET]);
+    if (!(ch & 0x80))
+	return 0;
+    return 1;
+}
+
+
+    /*
+     *  Any Buddha or Catweasel boards present?
+     */
+
+static int find_buddha(void)
+{
+    u_int key;
+    const struct ConfigDev *cd;
+
+    buddha_num_hwifs = 0;
+    if ((key = zorro_find(ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA, 0, 0)))
+	buddha_num_hwifs = BUDDHA_NUM_HWIFS;
+    else if ((key = zorro_find(ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL, 0,
+			       0)))
+	buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
+    if (key) {
+	cd = zorro_get_board(key);
+	buddha_board = (u_long)cd->cd_BoardAddr;
+	if (buddha_board) {
+	    buddha_board = ZTWO_VADDR(buddha_board);
+	    /* write to BUDDHA_IRQ_MR to enable the board IRQ */
+	    *(char *)(buddha_board+BUDDHA_IRQ_MR) = 0;
+	    zorro_config_board(key, 0);
+	}
+    }
+    return buddha_num_hwifs;
+}
+
+
+    /*
+     *  Probe for a Buddha or Catweasel IDE interface
+     *  We support only _one_ of them, no multiple boards!
+     */
+
+void buddha_init(void)
+{
+    hw_regs_t hw;
+    int i, index;
+
+    if (buddha_num_hwifs < 0 && !find_buddha())
+	return;
+
+    for (i = 0; i < buddha_num_hwifs; i++) {
+	ide_setup_ports(&hw, (ide_ioreg_t)(buddha_board+buddha_bases[i]),
+			buddha_offsets, 0,
+			(ide_ioreg_t)(buddha_board+buddha_irqports[i]),
+			buddha_ack_intr, IRQ_AMIGA_PORTS);
+	index = ide_register_hw(&hw, NULL);
+	if (index != -1)
+	    printk("ide%d: %s IDE interface\n", index,
+		   buddha_num_hwifs == BUDDHA_NUM_HWIFS ? "Buddha" :
+		   					  "Catweasel");
+    }
+}