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/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_CONTROL 0x101a
40 * These are at different offsets from the base
43 #define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
44 #define GAYLE_IRQ_1200 0xda9000 /* interrupt */
48 * Offset of the secondary port for IDE doublers
49 * Note that GAYLE_CONTROL is NOT available then!
52 #define GAYLE_NEXT_PORT 0x1000
54 #ifndef CONFIG_BLK_DEV_IDEDOUBLER
55 #define GAYLE_NUM_HWIFS 1
56 #define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
57 #define GAYLE_HAS_CONTROL_REG 1
58 #define GAYLE_IDEREG_SIZE 0x2000
59 #else /* CONFIG_BLK_DEV_IDEDOUBLER */
60 #define GAYLE_NUM_HWIFS 2
61 #define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
63 #define GAYLE_HAS_CONTROL_REG (!ide_doubler)
64 #define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
65 int ide_doubler = 0; /* support IDE doublers? */
66 module_param_named(doubler, ide_doubler, bool, 0);
67 MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
68 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
72 * Check and acknowledge the interrupt status
75 static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
79 ch = z_readb(hwif->io_ports.irq_addr);
80 if (!(ch & GAYLE_IRQ_IDE))
85 static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
89 ch = z_readb(hwif->io_ports.irq_addr);
90 if (!(ch & GAYLE_IRQ_IDE))
92 (void)z_readb(hwif->io_ports.status_addr);
93 z_writeb(0x7c, hwif->io_ports.irq_addr);
97 static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base,
98 unsigned long ctl, unsigned long irq_port,
99 ide_ack_intr_t *ack_intr)
103 memset(hw, 0, sizeof(*hw));
105 hw->io_ports.data_addr = base;
107 for (i = 1; i < 8; i++)
108 hw->io_ports_array[i] = base + 2 + i * 4;
110 hw->io_ports.ctl_addr = ctl;
111 hw->io_ports.irq_addr = irq_port;
113 hw->irq = IRQ_AMIGA_PORTS;
114 hw->ack_intr = ack_intr;
116 hw->chipset = ide_generic;
120 * Probe for a Gayle IDE interface (and optionally for an IDE doubler)
123 static int __init gayle_init(void)
126 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
131 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
135 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
142 printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
144 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
145 ide_doubler ? ", IDE doubler" :
149 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
150 unsigned long base, ctrlport, irqport;
151 ide_ack_intr_t *ack_intr;
154 unsigned long phys_base, res_start, res_n;
157 phys_base = GAYLE_BASE_4000;
158 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
159 ack_intr = gayle_ack_intr_a4000;
161 phys_base = GAYLE_BASE_1200;
162 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
163 ack_intr = gayle_ack_intr_a1200;
166 * FIXME: we now have selectable modes between mmio v/s iomio
169 phys_base += i*GAYLE_NEXT_PORT;
171 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
172 res_n = GAYLE_IDEREG_SIZE;
174 if (!request_mem_region(res_start, res_n, "IDE"))
177 base = (unsigned long)ZTWO_VADDR(phys_base);
178 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
180 gayle_setup_ports(&hw, base, ctrlport, irqport, ack_intr);
182 hwif = ide_find_port();
184 u8 index = hwif->index;
186 ide_init_port_data(hwif, index);
187 ide_init_port_hw(hwif, &hw);
191 release_mem_region(res_start, res_n);
194 ide_device_add(idx, NULL);
199 module_init(gayle_init);
201 MODULE_LICENSE("GPL");