[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_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;

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[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
     */

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++) {
			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);
			}	

			hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
			if (hwif) {
				u8 index = hwif->index;

				ide_init_port_data(hwif, index);
				ide_init_port_hw(hwif, &hw);

				hwif->mmio = 1;

				idx[i] = index;
			}
		}

		ide_device_add(idx, NULL);
	}

	return 0;
}

module_init(buddha_init);
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
	59
	60	/*
	61	* Offsets from one of the above bases
	62	*/
	63
	64	#define BUDDHA_DATA 0x00
	65	#define BUDDHA_ERROR 0x06 /* see err-bits */
	66	#define BUDDHA_NSECTOR 0x0a /* nr of sectors to read/write */
67	#define BUDDHA_SECTOR 0x0e /* starting sector */
68	#define BUDDHA_LCYL 0x12 /* starting cylinder */
69	#define BUDDHA_HCYL 0x16 /* high byte of starting cyl */
70	#define BUDDHA_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
71	#define BUDDHA_STATUS 0x1e /* see status-bits */
72	#define BUDDHA_CONTROL 0x11a
73	#define XSURF_CONTROL -1 /* X-Surf has no CS1* (Control/AltStat) */
74
75	static int buddha_offsets[IDE_NR_PORTS] __initdata = {
76	BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
77	BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL, -1
78	};
79
80	static int xsurf_offsets[IDE_NR_PORTS] __initdata = {
81	BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
82	BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, XSURF_CONTROL, -1
83	};
84
85	/*
86	* Other registers
87	*/
88
89	#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
90	#define BUDDHA_IRQ2 0xf40 /* interrupt */
91	#define BUDDHA_IRQ3 0xf80
92
93	#define XSURF_IRQ1 0x7e
94	#define XSURF_IRQ2 0x7e
95
96	static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
97	BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
98	};
99
100	static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
101	XSURF_IRQ1, XSURF_IRQ2
102	};
103
104	#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
105
106
107	/*
108	* Board information
109	*/
110
111	typedef enum BuddhaType_Enum {
112	BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
113	} BuddhaType;
114
c99c92c5	115	static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
1da177e4 LT	116
	117	/*
	118	* Check and acknowledge the interrupt status
	119	*/
	120
	121	static int buddha_ack_intr(ide_hwif_t *hwif)
	122	{
	123	unsigned char ch;
	124
	125	ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
	126	if (!(ch & 0x80))
	127	return 0;
	128	return 1;
	129	}
	130
	131	static int xsurf_ack_intr(ide_hwif_t *hwif)
	132	{
	133	unsigned char ch;
	134
	135	ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
	136	/* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
	137	z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]);
	138	if (!(ch & 0x80))
	139	return 0;
	140	return 1;
	141	}
	142
	143	/*
	144	* Probe for a Buddha or Catweasel IDE interface
	145	*/
	146
ade2daf9	147	static int __init buddha_init(void)
1da177e4 LT	148	{
	149	hw_regs_t hw;
	150	ide_hwif_t *hwif;
cbb010c1	151	int i;
1da177e4 LT	152
	153	struct zorro_dev *z = NULL;
	154	u_long buddha_board = 0;
	155	BuddhaType type;
	156	int buddha_num_hwifs;
	157
	158	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
	159	unsigned long board;
8ac4ce74 BZ	160	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
8ac4ce74 BZ	161
1da177e4 LT	162	if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
	163	buddha_num_hwifs = BUDDHA_NUM_HWIFS;
	164	type=BOARD_BUDDHA;
	165	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
	166	buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
	167	type=BOARD_CATWEASEL;
	168	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
	169	buddha_num_hwifs = XSURF_NUM_HWIFS;
	170	type=BOARD_XSURF;
	171	} else
	172	continue;
	173
	174	board = z->resource.start;
	175
	176	/*
	177	* FIXME: we now have selectable mmio v/s iomio transports.
	178	*/
	179
	180	if(type != BOARD_XSURF) {
	181	if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
	182	continue;
	183	} else {
	184	if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
	185	continue;
	186	if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
	187	goto fail_base2;
	188	if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
	189	release_mem_region(board+XSURF_BASE2, 0x1000);
	190	fail_base2:
	191	release_mem_region(board+XSURF_BASE1, 0x1000);
	192	continue;
	193	}
	194	}
	195	buddha_board = ZTWO_VADDR(board);
	196
	197	/* write to BUDDHA_IRQ_MR to enable the board IRQ */
	198	/* X-Surf doesn't have this. IRQs are always on */
	199	if (type != BOARD_XSURF)
	200	z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
c99c92c5 BZ	201
	202	printk(KERN_INFO "ide: %s IDE controller\n",
	203	buddha_board_name[type]);
	204
1da177e4 LT	205	for(i=0;i<buddha_num_hwifs;i++) {
	206	if(type != BOARD_XSURF) {
	207	ide_setup_ports(&hw, (buddha_board+buddha_bases[i]),
	208	buddha_offsets, 0,
	209	(buddha_board+buddha_irqports[i]),
	210	buddha_ack_intr,
	211	// budda_iops,
	212	IRQ_AMIGA_PORTS);
	213	} else {
	214	ide_setup_ports(&hw, (buddha_board+xsurf_bases[i]),
	215	xsurf_offsets, 0,
	216	(buddha_board+xsurf_irqports[i]),
	217	xsurf_ack_intr,
	218	// xsurf_iops,
	219	IRQ_AMIGA_PORTS);
	220	}
fd9bb539	221
cbb010c1 BZ	222	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
	223	if (hwif) {
	224	u8 index = hwif->index;
	225
	226	ide_init_port_data(hwif, index);
	227	ide_init_port_hw(hwif, &hw);
	228
2ad1e558	229	hwif->mmio = 1;
8ac4ce74 BZ	230
	231	idx[i] = index;
	232	}
1da177e4	233	}
8ac4ce74	234
c413b9b9	235	ide_device_add(idx, NULL);
1da177e4	236	}
ade2daf9 BZ	237
ade2daf9 BZ	238	return 0;
1da177e4	239	}
ade2daf9 BZ	240
ade2daf9 BZ	241	module_init(buddha_init);