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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/ide/legacy/buddha.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/ide/legacy/buddha.c')
-rw-r--r--drivers/ide/legacy/buddha.c235
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/ide/legacy/buddha.c b/drivers/ide/legacy/buddha.c
new file mode 100644
index 00000000000..0391a312287
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+++ b/drivers/ide/legacy/buddha.c
@@ -0,0 +1,235 @@
+/*
+ * linux/drivers/ide/legacy/buddha.c -- Amiga Buddha, Catweasel and X-Surf IDE Driver
+ *
+ * Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
+ *
+ * This driver was written based on the specifications in README.buddha and
+ * the X-Surf info from Inside_XSurf.txt available at
+ * http://www.jschoenfeld.com
+ *
+ * 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 <linux/init.h>
+
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+
+
+ /*
+ * The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
+ */
+
+#define BUDDHA_NUM_HWIFS 2
+#define CATWEASEL_NUM_HWIFS 3
+#define XSURF_NUM_HWIFS 2
+
+ /*
+ * Bases of the IDE interfaces (relative to the board address)
+ */
+
+#define BUDDHA_BASE1 0x800
+#define BUDDHA_BASE2 0xa00
+#define BUDDHA_BASE3 0xc00
+
+#define XSURF_BASE1 0xb000 /* 2.5" Interface */
+#define XSURF_BASE2 0xd000 /* 3.5" Interface */
+
+static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
+ BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
+};
+
+static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
+ XSURF_BASE1, XSURF_BASE2
+};
+
+
+ /*
+ * 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
+#define XSURF_CONTROL -1 /* X-Surf has no CS1* (Control/AltStat) */
+
+static int buddha_offsets[IDE_NR_PORTS] __initdata = {
+ BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
+ BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL, -1
+};
+
+static int xsurf_offsets[IDE_NR_PORTS] __initdata = {
+ BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
+ BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, XSURF_CONTROL, -1
+};
+
+ /*
+ * Other registers
+ */
+
+#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
+#define BUDDHA_IRQ2 0xf40 /* interrupt */
+#define BUDDHA_IRQ3 0xf80
+
+#define XSURF_IRQ1 0x7e
+#define XSURF_IRQ2 0x7e
+
+static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
+ BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
+};
+
+static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
+ XSURF_IRQ1, XSURF_IRQ2
+};
+
+#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
+
+
+ /*
+ * Board information
+ */
+
+typedef enum BuddhaType_Enum {
+ BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
+} BuddhaType;
+
+
+ /*
+ * Check and acknowledge the interrupt status
+ */
+
+static int buddha_ack_intr(ide_hwif_t *hwif)
+{
+ unsigned char ch;
+
+ ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
+ if (!(ch & 0x80))
+ return 0;
+ return 1;
+}
+
+static int xsurf_ack_intr(ide_hwif_t *hwif)
+{
+ unsigned char ch;
+
+ ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
+ /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
+ z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]);
+ if (!(ch & 0x80))
+ return 0;
+ return 1;
+}
+
+ /*
+ * Probe for a Buddha or Catweasel IDE interface
+ */
+
+void __init buddha_init(void)
+{
+ hw_regs_t hw;
+ ide_hwif_t *hwif;
+ int i, index;
+
+ struct zorro_dev *z = NULL;
+ u_long buddha_board = 0;
+ BuddhaType type;
+ int buddha_num_hwifs;
+
+ while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
+ unsigned long board;
+ if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
+ buddha_num_hwifs = BUDDHA_NUM_HWIFS;
+ type=BOARD_BUDDHA;
+ } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
+ buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
+ type=BOARD_CATWEASEL;
+ } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
+ buddha_num_hwifs = XSURF_NUM_HWIFS;
+ type=BOARD_XSURF;
+ } else
+ continue;
+
+ board = z->resource.start;
+
+/*
+ * FIXME: we now have selectable mmio v/s iomio transports.
+ */
+
+ if(type != BOARD_XSURF) {
+ if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
+ continue;
+ } else {
+ if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
+ continue;
+ if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
+ goto fail_base2;
+ if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
+ release_mem_region(board+XSURF_BASE2, 0x1000);
+fail_base2:
+ release_mem_region(board+XSURF_BASE1, 0x1000);
+ continue;
+ }
+ }
+ buddha_board = ZTWO_VADDR(board);
+
+ /* write to BUDDHA_IRQ_MR to enable the board IRQ */
+ /* X-Surf doesn't have this. IRQs are always on */
+ if (type != BOARD_XSURF)
+ z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
+
+ for(i=0;i<buddha_num_hwifs;i++) {
+ if(type != BOARD_XSURF) {
+ ide_setup_ports(&hw, (buddha_board+buddha_bases[i]),
+ buddha_offsets, 0,
+ (buddha_board+buddha_irqports[i]),
+ buddha_ack_intr,
+// budda_iops,
+ IRQ_AMIGA_PORTS);
+ } else {
+ ide_setup_ports(&hw, (buddha_board+xsurf_bases[i]),
+ xsurf_offsets, 0,
+ (buddha_board+xsurf_irqports[i]),
+ xsurf_ack_intr,
+// xsurf_iops,
+ IRQ_AMIGA_PORTS);
+ }
+
+ index = ide_register_hw(&hw, &hwif);
+ if (index != -1) {
+ hwif->mmio = 2;
+ printk("ide%d: ", index);
+ switch(type) {
+ case BOARD_BUDDHA:
+ printk("Buddha");
+ break;
+ case BOARD_CATWEASEL:
+ printk("Catweasel");
+ break;
+ case BOARD_XSURF:
+ printk("X-Surf");
+ break;
+ }
+ printk(" IDE interface\n");
+ }
+ }
+ }
+}