1 #include <linux/types.h>
3 #include <linux/blkdev.h>
4 #include <linux/sched.h>
5 #include <linux/version.h>
6 #include <linux/interrupt.h>
9 #include <asm/pgtable.h>
10 #include <asm/mvme147hw.h>
14 #include <scsi/scsi_host.h>
18 #include<linux/stat.h>
20 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
22 static struct Scsi_Host *mvme147_host = NULL;
24 static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp)
26 if (irq == MVME147_IRQ_SCSI_PORT)
27 wd33c93_intr (mvme147_host);
29 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
33 static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
35 unsigned char flags = 0x01;
36 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
38 /* setup dma direction */
42 /* remember direction */
43 HDATA(mvme147_host)->dma_dir = dir_in;
46 /* invalidate any cache */
47 cache_clear (addr, cmd->SCp.this_residual);
49 /* push any dirty cache */
50 cache_push (addr, cmd->SCp.this_residual);
53 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24);
54 m147_pcc->dma_dadr = addr;
55 m147_pcc->dma_cntrl = flags;
61 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
64 m147_pcc->dma_cntrl = 0;
67 int mvme147_detect(Scsi_Host_Template *tpnt)
69 static unsigned char called = 0;
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 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
89 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
91 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
93 #if 0 /* Disabled; causes problems booting */
94 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
96 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
98 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
100 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
102 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
103 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
108 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
111 scsi_unregister(mvme147_host);
116 static int mvme147_bus_reset(Scsi_Cmnd *cmd)
118 /* FIXME perform bus-specific reset */
120 /* FIXME 2: kill this function, and let midlayer fallback to
121 the same result, calling wd33c93_host_reset() */
123 spin_lock_irq(cmd->device->host->host_lock);
124 wd33c93_host_reset(cmd);
125 spin_unlock_irq(cmd->device->host->host_lock);
134 static Scsi_Host_Template driver_template = {
135 .proc_name = "MVME147",
136 .name = "MVME147 built-in SCSI",
137 .detect = mvme147_detect,
138 .release = mvme147_release,
139 .queuecommand = wd33c93_queuecommand,
140 .eh_abort_handler = wd33c93_abort,
141 .eh_bus_reset_handler = mvme147_bus_reset,
142 .eh_host_reset_handler = wd33c93_host_reset,
143 .can_queue = CAN_QUEUE,
145 .sg_tablesize = SG_ALL,
146 .cmd_per_lun = CMD_PER_LUN,
147 .use_clustering = ENABLE_CLUSTERING
151 #include "scsi_module.c"
153 int mvme147_release(struct Scsi_Host *instance)
156 /* XXX Make sure DMA is stopped! */
158 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
159 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);