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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz58f189f2008-02-01 23:09:33 +01002 * Amiga Gayle IDE Driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/types.h>
12#include <linux/mm.h>
13#include <linux/interrupt.h>
14#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/ide.h>
16#include <linux/init.h>
17#include <linux/zorro.h>
Adrian Bunk513f3c12008-06-10 20:56:38 +020018#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
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
Bartlomiej Zolnierkiewicz73dc5322008-07-23 19:55:56 +020033#define GAYLE_IDEREG_SIZE 0x2000
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 /*
36 * Offsets from one of the above bases
37 */
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define GAYLE_CONTROL 0x101a
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 /*
42 * These are at different offsets from the base
43 */
44
45#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
46#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
47
48
49 /*
50 * Offset of the secondary port for IDE doublers
51 * Note that GAYLE_CONTROL is NOT available then!
52 */
53
54#define GAYLE_NEXT_PORT 0x1000
55
56#ifndef CONFIG_BLK_DEV_IDEDOUBLER
57#define GAYLE_NUM_HWIFS 1
58#define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
59#define GAYLE_HAS_CONTROL_REG 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#else /* CONFIG_BLK_DEV_IDEDOUBLER */
61#define GAYLE_NUM_HWIFS 2
62#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
63 GAYLE_NUM_HWIFS-1)
64#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
Adrian Bunk513f3c12008-06-10 20:56:38 +020065
Bartlomiej Zolnierkiewicz931ee0d2008-07-15 21:21:47 +020066static int ide_doubler;
Bartlomiej Zolnierkiewicz9dcba7f2008-04-27 15:38:30 +020067module_param_named(doubler, ide_doubler, bool, 0);
68MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
70
71
72 /*
73 * Check and acknowledge the interrupt status
74 */
75
76static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
77{
78 unsigned char ch;
79
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020080 ch = z_readb(hwif->io_ports.irq_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 if (!(ch & GAYLE_IRQ_IDE))
82 return 0;
83 return 1;
84}
85
86static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
87{
88 unsigned char ch;
89
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020090 ch = z_readb(hwif->io_ports.irq_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 if (!(ch & GAYLE_IRQ_IDE))
92 return 0;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020093 (void)z_readb(hwif->io_ports.status_addr);
94 z_writeb(0x7c, hwif->io_ports.irq_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 return 1;
96}
97
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +010098static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base,
99 unsigned long ctl, unsigned long irq_port,
Adrian Bunk56efa7b2008-02-11 00:32:14 +0100100 ide_ack_intr_t *ack_intr)
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100101{
102 int i;
103
104 memset(hw, 0, sizeof(*hw));
105
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200106 hw->io_ports.data_addr = base;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100107
108 for (i = 1; i < 8; i++)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200109 hw->io_ports_array[i] = base + 2 + i * 4;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100110
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200111 hw->io_ports.ctl_addr = ctl;
112 hw->io_ports.irq_addr = irq_port;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100113
114 hw->irq = IRQ_AMIGA_PORTS;
115 hw->ack_intr = ack_intr;
Bartlomiej Zolnierkiewiczd427e832008-06-10 20:56:37 +0200116
117 hw->chipset = ide_generic;
Bartlomiej Zolnierkiewicz29dd5972008-02-06 02:57:50 +0100118}
119
Bartlomiej Zolnierkiewicza4cd1a32008-12-29 20:27:33 +0100120static const struct ide_port_info gayle_port_info = {
121 .host_flags = IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA,
122};
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 /*
125 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
126 */
127
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100128static int __init gayle_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129{
Bartlomiej Zolnierkiewicz73dc5322008-07-23 19:55:56 +0200130 unsigned long phys_base, res_start, res_n;
131 unsigned long base, ctrlport, irqport;
132 ide_ack_intr_t *ack_intr;
Bartlomiej Zolnierkiewicz96cc1122008-07-24 22:53:34 +0200133 int a4000, i, rc;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200134 hw_regs_t hw[GAYLE_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
136 if (!MACH_IS_AMIGA)
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100137 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
140 goto found;
141
142#ifdef CONFIG_ZORRO
143 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
144 NULL))
145 goto found;
146#endif
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100147 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149found:
Bartlomiej Zolnierkiewiczc99c92c2008-01-26 20:13:09 +0100150 printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
151 a4000 ? 4000 : 1200,
152#ifdef CONFIG_BLK_DEV_IDEDOUBLER
153 ide_doubler ? ", IDE doubler" :
154#endif
155 "");
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 if (a4000) {
158 phys_base = GAYLE_BASE_4000;
159 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
160 ack_intr = gayle_ack_intr_a4000;
161 } else {
162 phys_base = GAYLE_BASE_1200;
163 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
164 ack_intr = gayle_ack_intr_a1200;
165 }
166/*
167 * FIXME: we now have selectable modes between mmio v/s iomio
168 */
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
171 res_n = GAYLE_IDEREG_SIZE;
172
173 if (!request_mem_region(res_start, res_n, "IDE"))
Bartlomiej Zolnierkiewicz73dc5322008-07-23 19:55:56 +0200174 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Bartlomiej Zolnierkiewicz73dc5322008-07-23 19:55:56 +0200176 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
Bartlomiej Zolnierkiewicz73dc5322008-07-23 19:55:56 +0200177 base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
179
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200180 gayle_setup_ports(&hw[i], base, ctrlport, irqport, ack_intr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +0200182 hws[i] = &hw[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 }
Bartlomiej Zolnierkiewicz8ac4ce72008-01-26 20:13:06 +0100184
Bartlomiej Zolnierkiewicza4cd1a32008-12-29 20:27:33 +0100185 rc = ide_host_add(&gayle_port_info, hws, NULL);
Bartlomiej Zolnierkiewicz96cc1122008-07-24 22:53:34 +0200186 if (rc)
187 release_mem_region(res_start, res_n);
188
189 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190}
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100191
192module_init(gayle_init);
Adrian Bunk6e1d17d2008-04-02 21:22:04 +0200193
194MODULE_LICENSE("GPL");