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
11 #include <linux/types.h>
13 #include <linux/interrupt.h>
14 #include <linux/blkdev.h>
15 #include <linux/ide.h>
16 #include <linux/init.h>
17 #include <linux/zorro.h>
18 #include <linux/module.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 */
33 #define GAYLE_IDEREG_SIZE 0x2000
36 * Offsets from one of the above bases
39 #define GAYLE_CONTROL 0x101a
42 * These are at different offsets from the base
45 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
46 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
50 * Offset of the secondary port for IDE doublers
51 * Note that GAYLE_CONTROL is NOT available then!
54 #define GAYLE_NEXT_PORT 0x1000
56 #define GAYLE_NUM_HWIFS 2
57 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
59 #define GAYLE_HAS_CONTROL_REG (!ide_doubler)
61 static int ide_doubler;
62 module_param_named(doubler, ide_doubler, bool, 0);
63 MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
66 * Check and acknowledge the interrupt status
69 static int gayle_test_irq(ide_hwif_t *hwif)
73 ch = z_readb(hwif->io_ports.irq_addr);
74 if (!(ch & GAYLE_IRQ_IDE))
79 static void gayle_a1200_clear_irq(ide_drive_t *drive)
81 ide_hwif_t *hwif = drive->hwif;
83 (void)z_readb(hwif->io_ports.status_addr);
84 z_writeb(0x7c, hwif->io_ports.irq_addr);
87 static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
88 unsigned long ctl, unsigned long irq_port)
92 memset(hw, 0, sizeof(*hw));
94 hw->io_ports.data_addr = base;
96 for (i = 1; i < 8; i++)
97 hw->io_ports_array[i] = base + 2 + i * 4;
99 hw->io_ports.ctl_addr = ctl;
100 hw->io_ports.irq_addr = irq_port;
102 hw->irq = IRQ_AMIGA_PORTS;
105 static const struct ide_port_ops gayle_a4000_port_ops = {
106 .test_irq = gayle_test_irq,
109 static const struct ide_port_ops gayle_a1200_port_ops = {
110 .clear_irq = gayle_a1200_clear_irq,
111 .test_irq = gayle_test_irq,
114 static const struct ide_port_info gayle_port_info = {
115 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
117 .irq_flags = IRQF_SHARED,
118 .chipset = ide_generic,
122 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
125 static int __init gayle_init(void)
127 unsigned long phys_base, res_start, res_n;
128 unsigned long base, ctrlport, irqport;
130 struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
131 struct ide_port_info d = gayle_port_info;
136 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
140 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
147 printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
149 ide_doubler ? ", IDE doubler" : "");
152 phys_base = GAYLE_BASE_4000;
153 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
154 d.port_ops = &gayle_a4000_port_ops;
156 phys_base = GAYLE_BASE_1200;
157 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
158 d.port_ops = &gayle_a1200_port_ops;
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"))
167 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
168 base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT);
169 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
171 gayle_setup_ports(&hw[i], base, ctrlport, irqport);
176 rc = ide_host_add(&d, hws, i, NULL);
178 release_mem_region(res_start, res_n);
183 module_init(gayle_init);
185 MODULE_LICENSE("GPL");