[deliverable/linux.git] / 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_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;
}

    /*
     *  Probe for a Buddha or Catweasel IDE interface
     */

static int __init buddha_init(void)
{
	hw_regs_t hw;
	ide_hwif_t *hwif;
	int i;

	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;
		u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };

		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);

		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, base, ctl, irq_port, ack_intr);

			hwif = ide_find_port();
			if (hwif) {
				u8 index = hwif->index;

				ide_init_port_hw(hwif, &hw);

				idx[i] = index;
			}
		}

		ide_device_add(idx, 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>
	23	#include <linux/hdreg.h>
	24	#include <linux/zorro.h>
	25	#include <linux/ide.h>
	26	#include <linux/init.h>
	27
	28	#include <asm/amigahw.h>
	29	#include <asm/amigaints.h>
	30
	31
	32	/*
	33	* The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
	34	*/
	35
	36	#define BUDDHA_NUM_HWIFS 2
	37	#define CATWEASEL_NUM_HWIFS 3
	38	#define XSURF_NUM_HWIFS 2
	39
	40	/*
	41	* Bases of the IDE interfaces (relative to the board address)
	42	*/
	43
	44	#define BUDDHA_BASE1 0x800
	45	#define BUDDHA_BASE2 0xa00
	46	#define BUDDHA_BASE3 0xc00
	47
	48	#define XSURF_BASE1 0xb000 /* 2.5" Interface */
	49	#define XSURF_BASE2 0xd000 /* 3.5" Interface */
	50
	51	static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
	52	BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
	53	};
	54
	55	static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
	56	XSURF_BASE1, XSURF_BASE2
	57	};
	58
1da177e4 LT	59	/*
	60	* Offsets from one of the above bases
	61	*/
	62
1da177e4	63	#define BUDDHA_CONTROL 0x11a
1da177e4 LT	64
	65	/*
	66	* Other registers
	67	*/
	68
	69	#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
	70	#define BUDDHA_IRQ2 0xf40 /* interrupt */
	71	#define BUDDHA_IRQ3 0xf80
	72
	73	#define XSURF_IRQ1 0x7e
	74	#define XSURF_IRQ2 0x7e
	75
	76	static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
	77	BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
	78	};
	79
	80	static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
	81	XSURF_IRQ1, XSURF_IRQ2
	82	};
	83
	84	#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
	85
	86
	87	/*
	88	* Board information
	89	*/
	90
	91	typedef enum BuddhaType_Enum {
	92	BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
	93	} BuddhaType;
	94
c99c92c5	95	static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
1da177e4 LT	96
	97	/*
	98	* Check and acknowledge the interrupt status
	99	*/
	100
	101	static int buddha_ack_intr(ide_hwif_t *hwif)
	102	{
	103	unsigned char ch;
	104
4c3032d8	105	ch = z_readb(hwif->io_ports.irq_addr);
1da177e4 LT	106	if (!(ch & 0x80))
	107	return 0;
	108	return 1;
	109	}
	110
	111	static int xsurf_ack_intr(ide_hwif_t *hwif)
	112	{
	113	unsigned char ch;
	114
4c3032d8	115	ch = z_readb(hwif->io_ports.irq_addr);
1da177e4	116	/* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
4c3032d8	117	z_writeb(0, hwif->io_ports.irq_addr);
1da177e4 LT	118	if (!(ch & 0x80))
	119	return 0;
	120	return 1;
	121	}
	122
29dd5975 BZ	123	static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
	124	unsigned long ctl, unsigned long irq_port,
	125	ide_ack_intr_t *ack_intr)
	126	{
	127	int i;
	128
	129	memset(hw, 0, sizeof(*hw));
	130
4c3032d8	131	hw->io_ports.data_addr = base;
29dd5975 BZ	132
29dd5975 BZ	133	for (i = 1; i < 8; i++)
4c3032d8	134	hw->io_ports_array[i] = base + 2 + i * 4;
29dd5975	135
4c3032d8 BZ	136	hw->io_ports.ctl_addr = ctl;
4c3032d8 BZ	137	hw->io_ports.irq_addr = irq_port;
29dd5975 BZ	138
	139	hw->irq = IRQ_AMIGA_PORTS;
	140	hw->ack_intr = ack_intr;
d427e836 BZ	141
d427e836 BZ	142	hw->chipset = ide_generic;
29dd5975 BZ	143	}
29dd5975 BZ	144
1da177e4 LT	145	/*
	146	* Probe for a Buddha or Catweasel IDE interface
	147	*/
	148
ade2daf9	149	static int __init buddha_init(void)
1da177e4 LT	150	{
	151	hw_regs_t hw;
	152	ide_hwif_t *hwif;
cbb010c1	153	int i;
1da177e4 LT	154
	155	struct zorro_dev *z = NULL;
	156	u_long buddha_board = 0;
	157	BuddhaType type;
	158	int buddha_num_hwifs;
	159
	160	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
	161	unsigned long board;
8ac4ce74 BZ	162	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
8ac4ce74 BZ	163
1da177e4 LT	164	if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
	165	buddha_num_hwifs = BUDDHA_NUM_HWIFS;
	166	type=BOARD_BUDDHA;
	167	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
	168	buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
	169	type=BOARD_CATWEASEL;
	170	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
	171	buddha_num_hwifs = XSURF_NUM_HWIFS;
	172	type=BOARD_XSURF;
	173	} else
	174	continue;
	175
	176	board = z->resource.start;
	177
	178	/*
	179	* FIXME: we now have selectable mmio v/s iomio transports.
	180	*/
	181
	182	if(type != BOARD_XSURF) {
	183	if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
	184	continue;
	185	} else {
	186	if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
	187	continue;
	188	if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
	189	goto fail_base2;
	190	if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
	191	release_mem_region(board+XSURF_BASE2, 0x1000);
	192	fail_base2:
	193	release_mem_region(board+XSURF_BASE1, 0x1000);
	194	continue;
	195	}
	196	}
	197	buddha_board = ZTWO_VADDR(board);
	198
	199	/* write to BUDDHA_IRQ_MR to enable the board IRQ */
	200	/* X-Surf doesn't have this. IRQs are always on */
	201	if (type != BOARD_XSURF)
	202	z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
c99c92c5 BZ	203
	204	printk(KERN_INFO "ide: %s IDE controller\n",
	205	buddha_board_name[type]);
	206
29dd5975 BZ	207	for (i = 0; i < buddha_num_hwifs; i++) {
	208	unsigned long base, ctl, irq_port;
	209	ide_ack_intr_t *ack_intr;
	210
	211	if (type != BOARD_XSURF) {
	212	base = buddha_board + buddha_bases[i];
	213	ctl = base + BUDDHA_CONTROL;
	214	irq_port = buddha_board + buddha_irqports[i];
	215	ack_intr = buddha_ack_intr;
1da177e4	216	} else {
29dd5975 BZ	217	base = buddha_board + xsurf_bases[i];
	218	/* X-Surf has no CS1* (Control/AltStat) */
	219	ctl = 0;
	220	irq_port = buddha_board + xsurf_irqports[i];
	221	ack_intr = xsurf_ack_intr;
	222	}
	223
	224	buddha_setup_ports(&hw, base, ctl, irq_port, ack_intr);
fd9bb539	225
59bff5ba	226	hwif = ide_find_port();
cbb010c1 BZ	227	if (hwif) {
	228	u8 index = hwif->index;
	229
cbb010c1 BZ	230	ide_init_port_hw(hwif, &hw);
cbb010c1 BZ	231
8ac4ce74 BZ	232	idx[i] = index;
8ac4ce74 BZ	233	}
1da177e4	234	}
8ac4ce74	235
c413b9b9	236	ide_device_add(idx, NULL);
1da177e4	237	}
ade2daf9 BZ	238
ade2daf9 BZ	239	return 0;
1da177e4	240	}
ade2daf9 BZ	241
ade2daf9 BZ	242	module_init(buddha_init);
c5daf1aa AB	243
c5daf1aa AB	244	MODULE_LICENSE("GPL");