[SCSI] SUNESP: Complete driver rewrite to version 2.0
[linux-2.6] / drivers / scsi / amiga7xx.c
1 /*
2  * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
3  *              Amiga MacroSystemUS WarpEngine SCSI controller.
4  *              Amiga Technologies A4000T SCSI controller.
5  *              Amiga Technologies/DKB A4091 SCSI controller.
6  *
7  * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
8  * plus modifications of the 53c7xx.c driver to support the Amiga.
9  */
10 #include <linux/types.h>
11 #include <linux/mm.h>
12 #include <linux/blkdev.h>
13 #include <linux/zorro.h>
14 #include <linux/stat.h>
15
16 #include <asm/setup.h>
17 #include <asm/page.h>
18 #include <asm/pgtable.h>
19 #include <asm/amigaints.h>
20 #include <asm/amigahw.h>
21 #include <asm/dma.h>
22 #include <asm/irq.h>
23
24 #include "scsi.h"
25 #include <scsi/scsi_host.h>
26 #include "53c7xx.h"
27 #include "amiga7xx.h"
28
29
30 static int amiga7xx_register_one(struct scsi_host_template *tpnt,
31                                  unsigned long address)
32 {
33     long long options;
34     int clock;
35
36     if (!request_mem_region(address, 0x1000, "ncr53c710"))
37         return 0;
38
39     address = (unsigned long)z_ioremap(address, 0x1000);
40     options = OPTION_MEMORY_MAPPED | OPTION_DEBUG_TEST1 | OPTION_INTFLY |
41               OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS |
42               OPTION_DISCONNECT;
43     clock = 50000000;   /* 50 MHz SCSI Clock */
44     ncr53c7xx_init(tpnt, 0, 710, address, 0, IRQ_AMIGA_PORTS, DMA_NONE,
45                    options, clock);
46     return 1;
47 }
48
49
50 #ifdef CONFIG_ZORRO
51
52 static struct {
53     zorro_id id;
54     unsigned long offset;
55     int absolute;       /* offset is absolute address */
56 } amiga7xx_table[] = {
57     { .id = ZORRO_PROD_PHASE5_BLIZZARD_603E_PLUS, .offset = 0xf40000,
58       .absolute = 1 },
59     { .id = ZORRO_PROD_MACROSYSTEMS_WARP_ENGINE_40xx, .offset = 0x40000 },
60     { .id = ZORRO_PROD_CBM_A4091_1, .offset = 0x800000 },
61     { .id = ZORRO_PROD_CBM_A4091_2, .offset = 0x800000 },
62     { .id = ZORRO_PROD_GVP_GFORCE_040_060, .offset = 0x40000 },
63     { 0 }
64 };
65
66 static int __init amiga7xx_zorro_detect(struct scsi_host_template *tpnt)
67 {
68     int num = 0, i;
69     struct zorro_dev *z = NULL;
70     unsigned long address;
71
72     while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
73         for (i = 0; amiga7xx_table[i].id; i++)
74             if (z->id == amiga7xx_table[i].id)
75                 break;
76         if (!amiga7xx_table[i].id)
77             continue;
78         if (amiga7xx_table[i].absolute)
79             address = amiga7xx_table[i].offset;
80         else
81             address = z->resource.start + amiga7xx_table[i].offset;
82         num += amiga7xx_register_one(tpnt, address);
83     }
84     return num;
85 }
86
87 #endif /* CONFIG_ZORRO */
88
89
90 int __init amiga7xx_detect(struct scsi_host_template *tpnt)
91 {
92     static unsigned char called = 0;
93     int num = 0;
94
95     if (called || !MACH_IS_AMIGA)
96         return 0;
97
98     tpnt->proc_name = "Amiga7xx";
99
100     if (AMIGAHW_PRESENT(A4000_SCSI))
101         num += amiga7xx_register_one(tpnt, 0xdd0040);
102
103 #ifdef CONFIG_ZORRO
104     num += amiga7xx_zorro_detect(tpnt);
105 #endif
106
107     called = 1;
108     return num;
109 }
110
111 static int amiga7xx_release(struct Scsi_Host *shost)
112 {
113         if (shost->irq)
114                 free_irq(shost->irq, NULL);
115         if (shost->dma_channel != 0xff)
116                 free_dma(shost->dma_channel);
117         if (shost->io_port && shost->n_io_port)
118                 release_region(shost->io_port, shost->n_io_port);
119         scsi_unregister(shost);
120         return 0;
121 }
122
123 static struct scsi_host_template driver_template = {
124         .name                   = "Amiga NCR53c710 SCSI",
125         .detect                 = amiga7xx_detect,
126         .release                = amiga7xx_release,
127         .queuecommand           = NCR53c7xx_queue_command,
128         .abort                  = NCR53c7xx_abort,
129         .reset                  = NCR53c7xx_reset,
130         .can_queue              = 24,
131         .this_id                = 7,
132         .sg_tablesize           = 63,
133         .cmd_per_lun            = 3,
134         .use_clustering         = DISABLE_CLUSTERING
135 };
136
137
138 #include "scsi_module.c"