[deliverable/linux.git] / drivers / ide / legacy / gayle.c

/*
 *  linux/drivers/ide/legacy/gayle.c -- Amiga Gayle IDE Driver
 *
 *     Created 9 Jul 1997 by Geert Uytterhoeven
 *
 *  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.
 */

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <linux/zorro.h>

#include <asm/setup.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <asm/amigayle.h>


    /*
     *  Bases of the IDE interfaces
     */

#define GAYLE_BASE_4000	0xdd2020	/* A4000/A4000T */
#define GAYLE_BASE_1200	0xda0000	/* A1200/A600 and E-Matrix 530 */

    /*
     *  Offsets from one of the above bases
     */

#define GAYLE_DATA	0x00
#define GAYLE_ERROR	0x06		/* see err-bits */
#define GAYLE_NSECTOR	0x0a		/* nr of sectors to read/write */
#define GAYLE_SECTOR	0x0e		/* starting sector */
#define GAYLE_LCYL	0x12		/* starting cylinder */
#define GAYLE_HCYL	0x16		/* high byte of starting cyl */
#define GAYLE_SELECT	0x1a		/* 101dhhhh , d=drive, hhhh=head */
#define GAYLE_STATUS	0x1e		/* see status-bits */
#define GAYLE_CONTROL	0x101a

static int gayle_offsets[IDE_NR_PORTS] __initdata = {
    GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,
    GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1
};


    /*
     *  These are at different offsets from the base
     */

#define GAYLE_IRQ_4000	0xdd3020	/* MSB = 1, Harddisk is source of */
#define GAYLE_IRQ_1200	0xda9000	/* interrupt */


    /*
     *  Offset of the secondary port for IDE doublers
     *  Note that GAYLE_CONTROL is NOT available then!
     */

#define GAYLE_NEXT_PORT	0x1000

#ifndef CONFIG_BLK_DEV_IDEDOUBLER
#define GAYLE_NUM_HWIFS		1
#define GAYLE_NUM_PROBE_HWIFS	GAYLE_NUM_HWIFS
#define GAYLE_HAS_CONTROL_REG	1
#define GAYLE_IDEREG_SIZE	0x2000
#else /* CONFIG_BLK_DEV_IDEDOUBLER */
#define GAYLE_NUM_HWIFS		2
#define GAYLE_NUM_PROBE_HWIFS	(ide_doubler ? GAYLE_NUM_HWIFS : \
					       GAYLE_NUM_HWIFS-1)
#define GAYLE_HAS_CONTROL_REG	(!ide_doubler)
#define GAYLE_IDEREG_SIZE	(ide_doubler ? 0x1000 : 0x2000)
int ide_doubler = 0;	/* support IDE doublers? */
#endif /* CONFIG_BLK_DEV_IDEDOUBLER */


    /*
     *  Check and acknowledge the interrupt status
     */

static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
{
    unsigned char ch;

    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
    if (!(ch & GAYLE_IRQ_IDE))
	return 0;
    return 1;
}

static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
{
    unsigned char ch;

    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
    if (!(ch & GAYLE_IRQ_IDE))
	return 0;
    (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
    z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
    return 1;
}

    /*
     *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
     */

void __init gayle_init(void)
{
    int a4000, i;

    if (!MACH_IS_AMIGA)
	return;

    if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
	goto found;

#ifdef CONFIG_ZORRO
    if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
			  NULL))
	goto found;
#endif
    return;

found:
    for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
	unsigned long base, ctrlport, irqport;
	ide_ack_intr_t *ack_intr;
	hw_regs_t hw;
	ide_hwif_t *hwif;
	int index;
	unsigned long phys_base, res_start, res_n;

	if (a4000) {
	    phys_base = GAYLE_BASE_4000;
	    irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
	    ack_intr = gayle_ack_intr_a4000;
	} else {
	    phys_base = GAYLE_BASE_1200;
	    irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
	    ack_intr = gayle_ack_intr_a1200;
	}
/*
 * FIXME: we now have selectable modes between mmio v/s iomio
 */

	phys_base += i*GAYLE_NEXT_PORT;

	res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
	res_n = GAYLE_IDEREG_SIZE;

	if (!request_mem_region(res_start, res_n, "IDE"))
	    continue;

	base = (unsigned long)ZTWO_VADDR(phys_base);
	ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;

	ide_setup_ports(&hw, base, gayle_offsets,
			ctrlport, irqport, ack_intr,
//			&gayle_iops,
			IRQ_AMIGA_PORTS);

	index = ide_register_hw(&hw, 1, &hwif);
	if (index != -1) {
	    hwif->mmio = 1;
	    switch (i) {
		case 0:
		    printk("ide%d: Gayle IDE interface (A%d style)\n", index,
			   a4000 ? 4000 : 1200);
		    break;
#ifdef CONFIG_BLK_DEV_IDEDOUBLER
		case 1:
		    printk("ide%d: IDE doubler\n", index);
		    break;
#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
	    }
	} else
	    release_mem_region(res_start, res_n);
    }
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/ide/legacy/gayle.c -- Amiga Gayle IDE Driver
	3	*
	4	* Created 9 Jul 1997 by Geert Uytterhoeven
	5	*
	6	* This file is subject to the terms and conditions of the GNU General Public
	7	* License. See the file COPYING in the main directory of this archive for
	8	* more details.
	9	*/
	10
1da177e4 LT	11	#include <linux/types.h>
	12	#include <linux/mm.h>
	13	#include <linux/interrupt.h>
	14	#include <linux/blkdev.h>
	15	#include <linux/hdreg.h>
	16	#include <linux/ide.h>
	17	#include <linux/init.h>
	18	#include <linux/zorro.h>
	19
	20	#include <asm/setup.h>
	21	#include <asm/amigahw.h>
	22	#include <asm/amigaints.h>
	23	#include <asm/amigayle.h>
	24
	25
	26	/*
	27	* Bases of the IDE interfaces
	28	*/
	29
	30	#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
	31	#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
	32
	33	/*
	34	* Offsets from one of the above bases
	35	*/
	36
	37	#define GAYLE_DATA 0x00
	38	#define GAYLE_ERROR 0x06 /* see err-bits */
	39	#define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */
	40	#define GAYLE_SECTOR 0x0e /* starting sector */
	41	#define GAYLE_LCYL 0x12 /* starting cylinder */
	42	#define GAYLE_HCYL 0x16 /* high byte of starting cyl */
	43	#define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
	44	#define GAYLE_STATUS 0x1e /* see status-bits */
	45	#define GAYLE_CONTROL 0x101a
	46
	47	static int gayle_offsets[IDE_NR_PORTS] __initdata = {
	48	GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,
	49	GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1
	50	};
	51
	52
	53	/*
	54	* These are at different offsets from the base
	55	*/
	56
	57	#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
	58	#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
	59
	60
	61	/*
	62	* Offset of the secondary port for IDE doublers
	63	* Note that GAYLE_CONTROL is NOT available then!
	64	*/
	65
	66	#define GAYLE_NEXT_PORT 0x1000
	67
	68	#ifndef CONFIG_BLK_DEV_IDEDOUBLER
	69	#define GAYLE_NUM_HWIFS 1
	70	#define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
	71	#define GAYLE_HAS_CONTROL_REG 1
	72	#define GAYLE_IDEREG_SIZE 0x2000
	73	#else /* CONFIG_BLK_DEV_IDEDOUBLER */
	74	#define GAYLE_NUM_HWIFS 2
75	#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
76	GAYLE_NUM_HWIFS-1)
77	#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
78	#define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
79	int ide_doubler = 0; /* support IDE doublers? */
80	#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
81
82
83	/*
84	* Check and acknowledge the interrupt status
85	*/
86
87	static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
88	{
89	unsigned char ch;
90
91	ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
92	if (!(ch & GAYLE_IRQ_IDE))
93	return 0;
94	return 1;
95	}
96
97	static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
98	{
99	unsigned char ch;
100
101	ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
102	if (!(ch & GAYLE_IRQ_IDE))
103	return 0;
104	(void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
105	z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
106	return 1;
107	}
108
109	/*
110	* Probe for a Gayle IDE interface (and optionally for an IDE doubler)
111	*/
112
113	void __init gayle_init(void)
114	{
115	int a4000, i;
116
117	if (!MACH_IS_AMIGA)
118	return;
119
120	if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) \|\| AMIGAHW_PRESENT(A1200_IDE))
121	goto found;
122
123	#ifdef CONFIG_ZORRO
124	if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
125	NULL))
126	goto found;
127	#endif
128	return;
129
130	found:
131	for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
132	unsigned long base, ctrlport, irqport;
133	ide_ack_intr_t *ack_intr;
134	hw_regs_t hw;
135	ide_hwif_t *hwif;
136	int index;
137	unsigned long phys_base, res_start, res_n;
138
139	if (a4000) {
140	phys_base = GAYLE_BASE_4000;
141	irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
142	ack_intr = gayle_ack_intr_a4000;
143	} else {
144	phys_base = GAYLE_BASE_1200;
145	irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
146	ack_intr = gayle_ack_intr_a1200;
147	}
148	/*
149	* FIXME: we now have selectable modes between mmio v/s iomio
150	*/
151
152	phys_base += i*GAYLE_NEXT_PORT;
153
154	res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
155	res_n = GAYLE_IDEREG_SIZE;
156
157	if (!request_mem_region(res_start, res_n, "IDE"))
158	continue;
159
160	base = (unsigned long)ZTWO_VADDR(phys_base);
161	ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
162
163	ide_setup_ports(&hw, base, gayle_offsets,
164	ctrlport, irqport, ack_intr,
165	// &gayle_iops,
166	IRQ_AMIGA_PORTS);
167
869c56ee	168	index = ide_register_hw(&hw, 1, &hwif);
1da177e4	169	if (index != -1) {
2ad1e558	170	hwif->mmio = 1;
1da177e4 LT	171	switch (i) {
	172	case 0:
	173	printk("ide%d: Gayle IDE interface (A%d style)\n", index,
	174	a4000 ? 4000 : 1200);
	175	break;
	176	#ifdef CONFIG_BLK_DEV_IDEDOUBLER
	177	case 1:
	178	printk("ide%d: IDE doubler\n", index);
	179	break;
	180	#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
	181	}
	182	} else
	183	release_mem_region(res_start, res_n);
	184	}
	185	}