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);