1 #include <linux/types.h>
3 #include <linux/blkdev.h>
4 #include <linux/sched.h>
5 #include <linux/interrupt.h>
8 #include <asm/pgtable.h>
9 #include <asm/mvme147hw.h>
13 #include <scsi/scsi_host.h>
17 #include<linux/stat.h>
19 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
21 static struct Scsi_Host *mvme147_host = NULL;
23 static irqreturn_t mvme147_intr (int irq, void *dummy)
25 if (irq == MVME147_IRQ_SCSI_PORT)
26 wd33c93_intr (mvme147_host);
28 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
32 static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
34 unsigned char flags = 0x01;
35 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
37 /* setup dma direction */
41 /* remember direction */
42 HDATA(mvme147_host)->dma_dir = dir_in;
45 /* invalidate any cache */
46 cache_clear (addr, cmd->SCp.this_residual);
48 /* push any dirty cache */
49 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;
71 if (!MACH_IS_MVME147 || called)
75 tpnt->proc_name = "MVME147";
76 tpnt->proc_info = &wd33c93_proc_info;
78 mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
82 mvme147_host->base = 0xfffe4000;
83 mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
84 regs.SASR = (volatile unsigned char *)0xfffe4000;
85 regs.SCMD = (volatile unsigned char *)0xfffe4001;
86 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
88 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
90 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
92 #if 0 /* Disabled; causes problems booting */
93 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
95 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
97 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
99 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
101 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
102 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
107 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
110 scsi_unregister(mvme147_host);
115 static int mvme147_bus_reset(struct scsi_cmnd *cmd)
117 /* FIXME perform bus-specific reset */
119 /* FIXME 2: kill this function, and let midlayer fallback to
120 the same result, calling wd33c93_host_reset() */
122 spin_lock_irq(cmd->device->host->host_lock);
123 wd33c93_host_reset(cmd);
124 spin_unlock_irq(cmd->device->host->host_lock);
133 static struct scsi_host_template driver_template = {
134 .proc_name = "MVME147",
135 .name = "MVME147 built-in SCSI",
136 .detect = mvme147_detect,
137 .release = mvme147_release,
138 .queuecommand = wd33c93_queuecommand,
139 .eh_abort_handler = wd33c93_abort,
140 .eh_bus_reset_handler = mvme147_bus_reset,
141 .eh_host_reset_handler = wd33c93_host_reset,
142 .can_queue = CAN_QUEUE,
144 .sg_tablesize = SG_ALL,
145 .cmd_per_lun = CMD_PER_LUN,
146 .use_clustering = ENABLE_CLUSTERING
150 #include "scsi_module.c"
152 int mvme147_release(struct Scsi_Host *instance)
155 /* XXX Make sure DMA is stopped! */
157 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
158 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);