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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/ide/buddha.c
Initial import
Diffstat (limited to 'drivers/ide/buddha.c')
-rw-r--r--drivers/ide/buddha.c238
1 files changed, 238 insertions, 0 deletions
diff --git a/drivers/ide/buddha.c b/drivers/ide/buddha.c
new file mode 100644
index 000000000..46eaf58d8
--- /dev/null
+++ b/drivers/ide/buddha.c
@@ -0,0 +1,238 @@
+/*
+ * 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/zorro.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/module.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
+
+#define MAX_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
+
+#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_CONTROL 0x11a
+
+ /*
+ * 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;
+
+static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
+
+ /*
+ * Check and acknowledge the interrupt status
+ */
+
+static int buddha_test_irq(ide_hwif_t *hwif)
+{
+ unsigned char ch;
+
+ ch = z_readb(hwif->io_ports.irq_addr);
+ if (!(ch & 0x80))
+ return 0;
+ return 1;
+}
+
+static void xsurf_clear_irq(ide_drive_t *drive)
+{
+ /*
+ * X-Surf needs 0 written to IRQ register to ensure ISA bit A11 stays at 0
+ */
+ z_writeb(0, drive->hwif->io_ports.irq_addr);
+}
+
+static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base,
+ unsigned long ctl, unsigned long irq_port)
+{
+ int i;
+
+ memset(hw, 0, sizeof(*hw));
+
+ hw->io_ports.data_addr = base;
+
+ for (i = 1; i < 8; i++)
+ hw->io_ports_array[i] = base + 2 + i * 4;
+
+ hw->io_ports.ctl_addr = ctl;
+ hw->io_ports.irq_addr = irq_port;
+
+ hw->irq = IRQ_AMIGA_PORTS;
+}
+
+static const struct ide_port_ops buddha_port_ops = {
+ .test_irq = buddha_test_irq,
+};
+
+static const struct ide_port_ops xsurf_port_ops = {
+ .clear_irq = xsurf_clear_irq,
+ .test_irq = buddha_test_irq,
+};
+
+static const struct ide_port_info buddha_port_info = {
+ .port_ops = &buddha_port_ops,
+ .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+ .irq_flags = IRQF_SHARED,
+ .chipset = ide_generic,
+};
+
+ /*
+ * Probe for a Buddha or Catweasel IDE interface
+ */
+
+static int __init buddha_init(void)
+{
+ struct zorro_dev *z = NULL;
+ u_long buddha_board = 0;
+ BuddhaType type;
+ int buddha_num_hwifs, i;
+
+ while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
+ unsigned long board;
+ struct ide_hw hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS];
+ struct ide_port_info d = buddha_port_info;
+
+ 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;
+ d.port_ops = &xsurf_port_ops;
+ } else
+ continue;
+
+ board = z->resource.start;
+
+ 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 = (unsigned long)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);
+
+ printk(KERN_INFO "ide: %s IDE controller\n",
+ buddha_board_name[type]);
+
+ for (i = 0; i < buddha_num_hwifs; i++) {
+ unsigned long base, ctl, irq_port;
+
+ if (type != BOARD_XSURF) {
+ base = buddha_board + buddha_bases[i];
+ ctl = base + BUDDHA_CONTROL;
+ irq_port = buddha_board + buddha_irqports[i];
+ } else {
+ base = buddha_board + xsurf_bases[i];
+ /* X-Surf has no CS1* (Control/AltStat) */
+ ctl = 0;
+ irq_port = buddha_board + xsurf_irqports[i];
+ }
+
+ buddha_setup_ports(&hw[i], base, ctl, irq_port);
+
+ hws[i] = &hw[i];
+ }
+
+ ide_host_add(&d, hws, i, NULL);
+ }
+
+ return 0;
+}
+
+module_init(buddha_init);
+
+MODULE_LICENSE("GPL");