1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mvme147hw.h>
#include <asm/irq.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "wd33c93.h"
#include "mvme147.h"
#include<linux/stat.h>
#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
static struct Scsi_Host *mvme147_host = NULL;
static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp)
{
if (irq == MVME147_IRQ_SCSI_PORT)
wd33c93_intr (mvme147_host);
else
m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
return IRQ_HANDLED;
}
static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
{
unsigned char flags = 0x01;
unsigned long addr = virt_to_bus(cmd->SCp.ptr);
/* setup dma direction */
if (!dir_in)
flags |= 0x04;
/* remember direction */
HDATA(mvme147_host)->dma_dir = dir_in;
if (dir_in)
/* invalidate any cache */
cache_clear (addr, cmd->SCp.this_residual);
else
/* push any dirty cache */
cache_push (addr, cmd->SCp.this_residual);
/* start DMA */
m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24);
m147_pcc->dma_dadr = addr;
m147_pcc->dma_cntrl = flags;
/* return success */
return 0;
}
static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
int status)
{
m147_pcc->dma_cntrl = 0;
}
int mvme147_detect(struct scsi_host_template *tpnt)
{
static unsigned char called = 0;
wd33c93_regs regs;
if (!MACH_IS_MVME147 || called)
return 0;
called++;
tpnt->proc_name = "MVME147";
tpnt->proc_info = &wd33c93_proc_info;
mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
if (!mvme147_host)
goto err_out;
mvme147_host->base = 0xfffe4000;
mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
regs.SASR = (volatile unsigned char *)0xfffe4000;
regs.SCMD = (volatile unsigned char *)0xfffe4001;
wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
goto err_unregister;
if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
goto err_free_irq;
#if 0 /* Disabled; causes problems booting */
m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
udelay(100);
m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
udelay(2000);
m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
#endif
m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
return 1;
err_free_irq:
free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
err_unregister:
wd33c93_release();
scsi_unregister(mvme147_host);
err_out:
return 0;
}
static int mvme147_bus_reset(Scsi_Cmnd *cmd)
{
/* FIXME perform bus-specific reset */
/* FIXME 2: kill this function, and let midlayer fallback to
the same result, calling wd33c93_host_reset() */
spin_lock_irq(cmd->device->host->host_lock);
wd33c93_host_reset(cmd);
spin_unlock_irq(cmd->device->host->host_lock);
return SUCCESS;
}
#define HOSTS_C
#include "mvme147.h"
static struct scsi_host_template driver_template = {
.proc_name = "MVME147",
.name = "MVME147 built-in SCSI",
.detect = mvme147_detect,
.release = mvme147_release,
.queuecommand = wd33c93_queuecommand,
.eh_abort_handler = wd33c93_abort,
.eh_bus_reset_handler = mvme147_bus_reset,
.eh_host_reset_handler = wd33c93_host_reset,
.can_queue = CAN_QUEUE,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING
};
#include "scsi_module.c"
int mvme147_release(struct Scsi_Host *instance)
{
#ifdef MODULE
/* XXX Make sure DMA is stopped! */
wd33c93_release();
free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
#endif
return 1;
}
|
