kbuild: Fix instrumentation removal breakage on avr32
[wrt350n-kernel.git] / drivers / ide / legacy / gayle.c
blobfc29ce75aff156507484438dabe434246bc6f90d
1 /*
2 * Amiga Gayle IDE Driver
4 * Created 9 Jul 1997 by Geert Uytterhoeven
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 */
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>
20 #include <asm/setup.h>
21 #include <asm/amigahw.h>
22 #include <asm/amigaints.h>
23 #include <asm/amigayle.h>
27 * Bases of the IDE interfaces
30 #define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
31 #define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
34 * Offsets from one of the above bases
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
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
54 * These are at different offsets from the base
57 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
58 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
62 * Offset of the secondary port for IDE doublers
63 * Note that GAYLE_CONTROL is NOT available then!
66 #define GAYLE_NEXT_PORT 0x1000
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 */
84 * Check and acknowledge the interrupt status
87 static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
89 unsigned char ch;
91 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
92 if (!(ch & GAYLE_IRQ_IDE))
93 return 0;
94 return 1;
97 static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
99 unsigned char ch;
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;
110 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
113 static int __init gayle_init(void)
115 int a4000, i;
116 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
118 if (!MACH_IS_AMIGA)
119 return -ENODEV;
121 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
122 goto found;
124 #ifdef CONFIG_ZORRO
125 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
126 NULL))
127 goto found;
128 #endif
129 return -ENODEV;
131 found:
132 printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
133 a4000 ? 4000 : 1200,
134 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
135 ide_doubler ? ", IDE doubler" :
136 #endif
137 "");
139 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
140 unsigned long base, ctrlport, irqport;
141 ide_ack_intr_t *ack_intr;
142 hw_regs_t hw;
143 ide_hwif_t *hwif;
144 unsigned long phys_base, res_start, res_n;
146 if (a4000) {
147 phys_base = GAYLE_BASE_4000;
148 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
149 ack_intr = gayle_ack_intr_a4000;
150 } else {
151 phys_base = GAYLE_BASE_1200;
152 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
153 ack_intr = gayle_ack_intr_a1200;
156 * FIXME: we now have selectable modes between mmio v/s iomio
159 phys_base += i*GAYLE_NEXT_PORT;
161 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
162 res_n = GAYLE_IDEREG_SIZE;
164 if (!request_mem_region(res_start, res_n, "IDE"))
165 continue;
167 base = (unsigned long)ZTWO_VADDR(phys_base);
168 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
170 ide_setup_ports(&hw, base, gayle_offsets,
171 ctrlport, irqport, ack_intr,
172 // &gayle_iops,
173 IRQ_AMIGA_PORTS);
175 hwif = ide_find_port(base);
176 if (hwif) {
177 u8 index = hwif->index;
179 ide_init_port_data(hwif, index);
180 ide_init_port_hw(hwif, &hw);
182 hwif->mmio = 1;
184 idx[i] = index;
185 } else
186 release_mem_region(res_start, res_n);
189 ide_device_add(idx, NULL);
191 return 0;
194 module_init(gayle_init);