Merge branch 'tracing/core' into tracing/hw-breakpoints
[pandora-kernel.git] / drivers / ide / 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/ide.h>
16 #include <linux/init.h>
17 #include <linux/zorro.h>
18 #include <linux/module.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 #define GAYLE_IDEREG_SIZE       0x2000
34
35     /*
36      *  Offsets from one of the above bases
37      */
38
39 #define GAYLE_CONTROL   0x101a
40
41     /*
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 #define GAYLE_NUM_HWIFS         2
57 #define GAYLE_NUM_PROBE_HWIFS   (ide_doubler ? GAYLE_NUM_HWIFS : \
58                                                GAYLE_NUM_HWIFS-1)
59 #define GAYLE_HAS_CONTROL_REG   (!ide_doubler)
60
61 static int ide_doubler;
62 module_param_named(doubler, ide_doubler, bool, 0);
63 MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
64
65     /*
66      *  Check and acknowledge the interrupt status
67      */
68
69 static int gayle_test_irq(ide_hwif_t *hwif)
70 {
71     unsigned char ch;
72
73     ch = z_readb(hwif->io_ports.irq_addr);
74     if (!(ch & GAYLE_IRQ_IDE))
75         return 0;
76     return 1;
77 }
78
79 static void gayle_a1200_clear_irq(ide_drive_t *drive)
80 {
81     ide_hwif_t *hwif = drive->hwif;
82
83     (void)z_readb(hwif->io_ports.status_addr);
84     z_writeb(0x7c, hwif->io_ports.irq_addr);
85 }
86
87 static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
88                                      unsigned long ctl, unsigned long irq_port)
89 {
90         int i;
91
92         memset(hw, 0, sizeof(*hw));
93
94         hw->io_ports.data_addr = base;
95
96         for (i = 1; i < 8; i++)
97                 hw->io_ports_array[i] = base + 2 + i * 4;
98
99         hw->io_ports.ctl_addr = ctl;
100         hw->io_ports.irq_addr = irq_port;
101
102         hw->irq = IRQ_AMIGA_PORTS;
103 }
104
105 static const struct ide_port_ops gayle_a4000_port_ops = {
106         .test_irq               = gayle_test_irq,
107 };
108
109 static const struct ide_port_ops gayle_a1200_port_ops = {
110         .clear_irq              = gayle_a1200_clear_irq,
111         .test_irq               = gayle_test_irq,
112 };
113
114 static const struct ide_port_info gayle_port_info = {
115         .host_flags             = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
116                                   IDE_HFLAG_NO_DMA,
117         .irq_flags              = IRQF_SHARED,
118         .chipset                = ide_generic,
119 };
120
121     /*
122      *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
123      */
124
125 static int __init gayle_init(void)
126 {
127     unsigned long phys_base, res_start, res_n;
128     unsigned long base, ctrlport, irqport;
129     int a4000, i, rc;
130     struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
131     struct ide_port_info d = gayle_port_info;
132
133     if (!MACH_IS_AMIGA)
134         return -ENODEV;
135
136     if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
137         goto found;
138
139 #ifdef CONFIG_ZORRO
140     if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
141                           NULL))
142         goto found;
143 #endif
144     return -ENODEV;
145
146 found:
147         printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
148                          a4000 ? 4000 : 1200,
149                          ide_doubler ? ", IDE doubler" : "");
150
151         if (a4000) {
152             phys_base = GAYLE_BASE_4000;
153             irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
154             d.port_ops = &gayle_a4000_port_ops;
155         } else {
156             phys_base = GAYLE_BASE_1200;
157             irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
158             d.port_ops = &gayle_a1200_port_ops;
159         }
160
161         res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
162         res_n = GAYLE_IDEREG_SIZE;
163
164         if (!request_mem_region(res_start, res_n, "IDE"))
165                 return -EBUSY;
166
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;
170
171         gayle_setup_ports(&hw[i], base, ctrlport, irqport);
172
173         hws[i] = &hw[i];
174     }
175
176     rc = ide_host_add(&d, hws, i, NULL);
177     if (rc)
178         release_mem_region(res_start, res_n);
179
180     return rc;
181 }
182
183 module_init(gayle_init);
184
185 MODULE_LICENSE("GPL");