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 000000000000..0391a3122878
--- /dev/null
+++ 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");         
+                        }                     
+                }
+        }
+}