1 #include <linux/types.h>
3 #include <linux/blkdev.h>
4 #include <linux/interrupt.h>
7 #include <asm/pgtable.h>
8 #include <asm/mvme147hw.h>
12 #include <scsi/scsi_host.h>
16 #include <linux/stat.h>
19 static struct Scsi_Host
*mvme147_host
= NULL
;
21 static irqreturn_t
mvme147_intr(int irq
, void *dummy
)
23 if (irq
== MVME147_IRQ_SCSI_PORT
)
24 wd33c93_intr(mvme147_host
);
26 m147_pcc
->dma_intr
= 0x89; /* Ack and enable ints */
30 static int dma_setup(struct scsi_cmnd
*cmd
, int dir_in
)
32 struct WD33C93_hostdata
*hdata
= shost_priv(mvme147_host
);
33 unsigned char flags
= 0x01;
34 unsigned long addr
= virt_to_bus(cmd
->SCp
.ptr
);
36 /* setup dma direction */
40 /* remember direction */
41 hdata
->dma_dir
= dir_in
;
44 /* invalidate any cache */
45 cache_clear(addr
, cmd
->SCp
.this_residual
);
47 /* push any dirty cache */
48 cache_push(addr
, cmd
->SCp
.this_residual
);
52 m147_pcc
->dma_bcr
= cmd
->SCp
.this_residual
| (1 << 24);
53 m147_pcc
->dma_dadr
= addr
;
54 m147_pcc
->dma_cntrl
= flags
;
60 static void dma_stop(struct Scsi_Host
*instance
, struct scsi_cmnd
*SCpnt
,
63 m147_pcc
->dma_cntrl
= 0;
66 int mvme147_detect(struct scsi_host_template
*tpnt
)
68 static unsigned char called
= 0;
70 struct WD33C93_hostdata
*hdata
;
72 if (!MACH_IS_MVME147
|| called
)
76 tpnt
->proc_name
= "MVME147";
77 tpnt
->proc_info
= &wd33c93_proc_info
;
79 mvme147_host
= scsi_register(tpnt
, sizeof(struct WD33C93_hostdata
));
83 mvme147_host
->base
= 0xfffe4000;
84 mvme147_host
->irq
= MVME147_IRQ_SCSI_PORT
;
85 regs
.SASR
= (volatile unsigned char *)0xfffe4000;
86 regs
.SCMD
= (volatile unsigned char *)0xfffe4001;
87 hdata
= shost_priv(mvme147_host
);
88 hdata
->no_sync
= 0xff;
90 hdata
->dma_mode
= CTRL_DMA
;
91 wd33c93_init(mvme147_host
, regs
, dma_setup
, dma_stop
, WD33C93_FS_8_10
);
93 if (request_irq(MVME147_IRQ_SCSI_PORT
, mvme147_intr
, 0,
94 "MVME147 SCSI PORT", mvme147_intr
))
96 if (request_irq(MVME147_IRQ_SCSI_DMA
, mvme147_intr
, 0,
97 "MVME147 SCSI DMA", mvme147_intr
))
99 #if 0 /* Disabled; causes problems booting */
100 m147_pcc
->scsi_interrupt
= 0x10; /* Assert SCSI bus reset */
102 m147_pcc
->scsi_interrupt
= 0x00; /* Negate SCSI bus reset */
104 m147_pcc
->scsi_interrupt
= 0x40; /* Clear bus reset interrupt */
106 m147_pcc
->scsi_interrupt
= 0x09; /* Enable interrupt */
108 m147_pcc
->dma_cntrl
= 0x00; /* ensure DMA is stopped */
109 m147_pcc
->dma_intr
= 0x89; /* Ack and enable ints */
114 free_irq(MVME147_IRQ_SCSI_PORT
, mvme147_intr
);
116 scsi_unregister(mvme147_host
);
121 static int mvme147_bus_reset(struct scsi_cmnd
*cmd
)
123 /* FIXME perform bus-specific reset */
125 /* FIXME 2: kill this function, and let midlayer fallback to
126 the same result, calling wd33c93_host_reset() */
128 spin_lock_irq(cmd
->device
->host
->host_lock
);
129 wd33c93_host_reset(cmd
);
130 spin_unlock_irq(cmd
->device
->host
->host_lock
);
139 static struct scsi_host_template driver_template
= {
140 .proc_name
= "MVME147",
141 .name
= "MVME147 built-in SCSI",
142 .detect
= mvme147_detect
,
143 .release
= mvme147_release
,
144 .queuecommand
= wd33c93_queuecommand
,
145 .eh_abort_handler
= wd33c93_abort
,
146 .eh_bus_reset_handler
= mvme147_bus_reset
,
147 .eh_host_reset_handler
= wd33c93_host_reset
,
148 .can_queue
= CAN_QUEUE
,
150 .sg_tablesize
= SG_ALL
,
151 .cmd_per_lun
= CMD_PER_LUN
,
152 .use_clustering
= ENABLE_CLUSTERING
156 #include "scsi_module.c"
158 int mvme147_release(struct Scsi_Host
*instance
)
161 /* XXX Make sure DMA is stopped! */
162 free_irq(MVME147_IRQ_SCSI_PORT
, mvme147_intr
);
163 free_irq(MVME147_IRQ_SCSI_DMA
, mvme147_intr
);