diff options
Diffstat (limited to 'drivers/ide/legacy/buddha.c')
| -rw-r--r-- | drivers/ide/legacy/buddha.c | 235 |
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 --- /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"); + } + } + } +} |