[deliverable/linux.git] / drivers / ide / 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/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

#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_ack_intr(ide_hwif_t *hwif)
{
    unsigned char ch;

    ch = z_readb(hwif->io_ports.irq_addr);
    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.irq_addr);
    /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
    z_writeb(0, hwif->io_ports.irq_addr);
    if (!(ch & 0x80))
	    return 0;
    return 1;
}

static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
				      unsigned long ctl, unsigned long irq_port,
				      ide_ack_intr_t *ack_intr)
{
	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;
	hw->ack_intr = ack_intr;

	hw->chipset = ide_generic;
}

static const struct ide_port_info buddha_port_info = {
	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
};

    /*
     *  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;
		hw_regs_t hw[MAX_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };

		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;

		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);

		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;
			ide_ack_intr_t *ack_intr;

			if (type != BOARD_XSURF) {
				base = buddha_board + buddha_bases[i];
				ctl = base + BUDDHA_CONTROL;
				irq_port = buddha_board + buddha_irqports[i];
				ack_intr = buddha_ack_intr;
			} else {
				base = buddha_board + xsurf_bases[i];
				/* X-Surf has no CS1* (Control/AltStat) */
				ctl = 0;
				irq_port = buddha_board + xsurf_irqports[i];
				ack_intr = xsurf_ack_intr;
			}

			buddha_setup_ports(&hw[i], base, ctl, irq_port,
					   ack_intr);

			hws[i] = &hw[i];
		}

		ide_host_add(&buddha_port_info, hws, NULL);
	}

	return 0;
}

module_init(buddha_init);

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
58f189fc	2	* Amiga Buddha, Catweasel and X-Surf IDE Driver
1da177e4 LT	3	*
	4	* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
	5	*
	6	* This driver was written based on the specifications in README.buddha and
	7	* the X-Surf info from Inside_XSurf.txt available at
	8	* http://www.jschoenfeld.com
	9	*
	10	* This file is subject to the terms and conditions of the GNU General Public
	11	* License. See the file COPYING in the main directory of this archive for
	12	* more details.
	13	*
	14	* TODO:
	15	* - test it :-)
	16	* - tune the timings using the speed-register
	17	*/
	18
	19	#include <linux/types.h>
	20	#include <linux/mm.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/blkdev.h>
1da177e4 LT	23	#include <linux/zorro.h>
	24	#include <linux/ide.h>
	25	#include <linux/init.h>
	26
	27	#include <asm/amigahw.h>
	28	#include <asm/amigaints.h>
	29
	30
	31	/*
	32	* The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
	33	*/
	34
	35	#define BUDDHA_NUM_HWIFS 2
	36	#define CATWEASEL_NUM_HWIFS 3
	37	#define XSURF_NUM_HWIFS 2
	38
c97c6aca BZ	39	#define MAX_NUM_HWIFS 3
c97c6aca BZ	40
1da177e4 LT	41	/*
	42	* Bases of the IDE interfaces (relative to the board address)
	43	*/
	44
	45	#define BUDDHA_BASE1 0x800
	46	#define BUDDHA_BASE2 0xa00
	47	#define BUDDHA_BASE3 0xc00
	48
	49	#define XSURF_BASE1 0xb000 /* 2.5" Interface */
	50	#define XSURF_BASE2 0xd000 /* 3.5" Interface */
	51
	52	static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
	53	BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
	54	};
	55
	56	static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
	57	XSURF_BASE1, XSURF_BASE2
	58	};
	59
1da177e4 LT	60	/*
	61	* Offsets from one of the above bases
	62	*/
	63
1da177e4	64	#define BUDDHA_CONTROL 0x11a
1da177e4 LT	65
	66	/*
	67	* Other registers
	68	*/
	69
	70	#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
	71	#define BUDDHA_IRQ2 0xf40 /* interrupt */
	72	#define BUDDHA_IRQ3 0xf80
	73
	74	#define XSURF_IRQ1 0x7e
	75	#define XSURF_IRQ2 0x7e
	76
	77	static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
	78	BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
	79	};
	80
	81	static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
	82	XSURF_IRQ1, XSURF_IRQ2
	83	};
	84
	85	#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
	86
	87
	88	/*
	89	* Board information
	90	*/
	91
	92	typedef enum BuddhaType_Enum {
	93	BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
	94	} BuddhaType;
	95
c99c92c5	96	static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
1da177e4 LT	97
	98	/*
	99	* Check and acknowledge the interrupt status
	100	*/
	101
	102	static int buddha_ack_intr(ide_hwif_t *hwif)
	103	{
	104	unsigned char ch;
	105
4c3032d8	106	ch = z_readb(hwif->io_ports.irq_addr);
1da177e4 LT	107	if (!(ch & 0x80))
	108	return 0;
	109	return 1;
	110	}
	111
	112	static int xsurf_ack_intr(ide_hwif_t *hwif)
	113	{
	114	unsigned char ch;
	115
4c3032d8	116	ch = z_readb(hwif->io_ports.irq_addr);
1da177e4	117	/* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
4c3032d8	118	z_writeb(0, hwif->io_ports.irq_addr);
1da177e4 LT	119	if (!(ch & 0x80))
	120	return 0;
	121	return 1;
	122	}
	123
29dd5975 BZ	124	static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
	125	unsigned long ctl, unsigned long irq_port,
	126	ide_ack_intr_t *ack_intr)
	127	{
	128	int i;
	129
	130	memset(hw, 0, sizeof(*hw));
	131
4c3032d8	132	hw->io_ports.data_addr = base;
29dd5975 BZ	133
29dd5975 BZ	134	for (i = 1; i < 8; i++)
4c3032d8	135	hw->io_ports_array[i] = base + 2 + i * 4;
29dd5975	136
4c3032d8 BZ	137	hw->io_ports.ctl_addr = ctl;
4c3032d8 BZ	138	hw->io_ports.irq_addr = irq_port;
29dd5975 BZ	139
	140	hw->irq = IRQ_AMIGA_PORTS;
	141	hw->ack_intr = ack_intr;
d427e836 BZ	142
d427e836 BZ	143	hw->chipset = ide_generic;
29dd5975 BZ	144	}
29dd5975 BZ	145
0e78a54f	146	static const struct ide_port_info buddha_port_info = {
09a3e791	147	.host_flags = IDE_HFLAG_MMIO \| IDE_HFLAG_NO_DMA,
0e78a54f BZ	148	};
0e78a54f BZ	149
1da177e4 LT	150	/*
	151	* Probe for a Buddha or Catweasel IDE interface
	152	*/
	153
ade2daf9	154	static int __init buddha_init(void)
1da177e4	155	{
1da177e4 LT	156	struct zorro_dev *z = NULL;
	157	u_long buddha_board = 0;
	158	BuddhaType type;
48c3c107	159	int buddha_num_hwifs, i;
1da177e4 LT	160
	161	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
	162	unsigned long board;
c97c6aca	163	hw_regs_t hw[MAX_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
8ac4ce74	164
1da177e4 LT	165	if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
	166	buddha_num_hwifs = BUDDHA_NUM_HWIFS;
	167	type=BOARD_BUDDHA;
	168	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
	169	buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
	170	type=BOARD_CATWEASEL;
	171	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
	172	buddha_num_hwifs = XSURF_NUM_HWIFS;
	173	type=BOARD_XSURF;
	174	} else
	175	continue;
	176
	177	board = z->resource.start;
	178
1da177e4 LT	179	if(type != BOARD_XSURF) {
	180	if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
	181	continue;
	182	} else {
	183	if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
	184	continue;
	185	if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
	186	goto fail_base2;
	187	if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
	188	release_mem_region(board+XSURF_BASE2, 0x1000);
	189	fail_base2:
	190	release_mem_region(board+XSURF_BASE1, 0x1000);
	191	continue;
	192	}
	193	}
	194	buddha_board = ZTWO_VADDR(board);
	195
	196	/* write to BUDDHA_IRQ_MR to enable the board IRQ */
	197	/* X-Surf doesn't have this. IRQs are always on */
	198	if (type != BOARD_XSURF)
	199	z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
c99c92c5 BZ	200
	201	printk(KERN_INFO "ide: %s IDE controller\n",
	202	buddha_board_name[type]);
	203
29dd5975 BZ	204	for (i = 0; i < buddha_num_hwifs; i++) {
	205	unsigned long base, ctl, irq_port;
	206	ide_ack_intr_t *ack_intr;
	207
	208	if (type != BOARD_XSURF) {
	209	base = buddha_board + buddha_bases[i];
	210	ctl = base + BUDDHA_CONTROL;
	211	irq_port = buddha_board + buddha_irqports[i];
	212	ack_intr = buddha_ack_intr;
1da177e4	213	} else {
29dd5975 BZ	214	base = buddha_board + xsurf_bases[i];
	215	/* X-Surf has no CS1* (Control/AltStat) */
	216	ctl = 0;
	217	irq_port = buddha_board + xsurf_irqports[i];
	218	ack_intr = xsurf_ack_intr;
	219	}
	220
c97c6aca BZ	221	buddha_setup_ports(&hw[i], base, ctl, irq_port,
c97c6aca BZ	222	ack_intr);
fd9bb539	223
48c3c107	224	hws[i] = &hw[i];
1da177e4	225	}
8ac4ce74	226
0e78a54f	227	ide_host_add(&buddha_port_info, hws, NULL);
1da177e4	228	}
ade2daf9 BZ	229
ade2daf9 BZ	230	return 0;
1da177e4	231	}
ade2daf9 BZ	232
ade2daf9 BZ	233	module_init(buddha_init);
c5daf1aa AB	234
c5daf1aa AB	235	MODULE_LICENSE("GPL");