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ide: fix host drivers missing hwif->chipset initialization
[linux-2.6-omap-h63xx.git] / drivers / ide / legacy / gayle.c
1 /*
2  *  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
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_CONTROL   0x101a
38
39     /*
40      *  These are at different offsets from the base
41      */
42
43 #define GAYLE_IRQ_4000  0xdd3020        /* MSB = 1, Harddisk is source of */
44 #define GAYLE_IRQ_1200  0xda9000        /* interrupt */
45
46
47     /*
48      *  Offset of the secondary port for IDE doublers
49      *  Note that GAYLE_CONTROL is NOT available then!
50      */
51
52 #define GAYLE_NEXT_PORT 0x1000
53
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 : \
62                                                GAYLE_NUM_HWIFS-1)
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 */
69
70
71     /*
72      *  Check and acknowledge the interrupt status
73      */
74
75 static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
76 {
77     unsigned char ch;
78
79     ch = z_readb(hwif->io_ports.irq_addr);
80     if (!(ch & GAYLE_IRQ_IDE))
81         return 0;
82     return 1;
83 }
84
85 static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
86 {
87     unsigned char ch;
88
89     ch = z_readb(hwif->io_ports.irq_addr);
90     if (!(ch & GAYLE_IRQ_IDE))
91         return 0;
92     (void)z_readb(hwif->io_ports.status_addr);
93     z_writeb(0x7c, hwif->io_ports.irq_addr);
94     return 1;
95 }
96
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)
100 {
101         int i;
102
103         memset(hw, 0, sizeof(*hw));
104
105         hw->io_ports.data_addr = base;
106
107         for (i = 1; i < 8; i++)
108                 hw->io_ports_array[i] = base + 2 + i * 4;
109
110         hw->io_ports.ctl_addr = ctl;
111         hw->io_ports.irq_addr = irq_port;
112
113         hw->irq = IRQ_AMIGA_PORTS;
114         hw->ack_intr = ack_intr;
115
116         hw->chipset = ide_generic;
117 }
118
119     /*
120      *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
121      */
122
123 static int __init gayle_init(void)
124 {
125     int a4000, i;
126     u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
127
128     if (!MACH_IS_AMIGA)
129         return -ENODEV;
130
131     if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
132         goto found;
133
134 #ifdef CONFIG_ZORRO
135     if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
136                           NULL))
137         goto found;
138 #endif
139     return -ENODEV;
140
141 found:
142         printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
143                          a4000 ? 4000 : 1200,
144 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
145                          ide_doubler ? ", IDE doubler" :
146 #endif
147                          "");
148
149     for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
150         unsigned long base, ctrlport, irqport;
151         ide_ack_intr_t *ack_intr;
152         hw_regs_t hw;
153         ide_hwif_t *hwif;
154         unsigned long phys_base, res_start, res_n;
155
156         if (a4000) {
157             phys_base = GAYLE_BASE_4000;
158             irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
159             ack_intr = gayle_ack_intr_a4000;
160         } else {
161             phys_base = GAYLE_BASE_1200;
162             irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
163             ack_intr = gayle_ack_intr_a1200;
164         }
165 /*
166  * FIXME: we now have selectable modes between mmio v/s iomio
167  */
168
169         phys_base += i*GAYLE_NEXT_PORT;
170
171         res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
172         res_n = GAYLE_IDEREG_SIZE;
173
174         if (!request_mem_region(res_start, res_n, "IDE"))
175             continue;
176
177         base = (unsigned long)ZTWO_VADDR(phys_base);
178         ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
179
180         gayle_setup_ports(&hw, base, ctrlport, irqport, ack_intr);
181
182         hwif = ide_find_port();
183         if (hwif) {
184             u8 index = hwif->index;
185
186             ide_init_port_data(hwif, index);
187             ide_init_port_hw(hwif, &hw);
188
189             idx[i] = index;
190         } else
191             release_mem_region(res_start, res_n);
192     }
193
194     ide_device_add(idx, NULL);
195
196     return 0;
197 }
198
199 module_init(gayle_init);
200
201 MODULE_LICENSE("GPL");