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 #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);
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, struct scsi_cmnd *SCpnt,
64 m147_pcc->dma_cntrl = 0;
67 int mvme147_detect(struct 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 HDATA(mvme147_host)->no_sync = 0xff;
88 HDATA(mvme147_host)->fast = 0;
89 HDATA(mvme147_host)->dma_mode = CTRL_DMA;
90 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
92 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
93 "MVME147 SCSI PORT", mvme147_intr))
95 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
96 "MVME147 SCSI DMA", mvme147_intr))
98 #if 0 /* Disabled; causes problems booting */
99 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
101 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
103 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
105 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
107 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
108 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
113 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
115 scsi_unregister(mvme147_host);
120 static int mvme147_bus_reset(struct scsi_cmnd *cmd)
122 /* FIXME perform bus-specific reset */
124 /* FIXME 2: kill this function, and let midlayer fallback to
125 the same result, calling wd33c93_host_reset() */
127 spin_lock_irq(cmd->device->host->host_lock);
128 wd33c93_host_reset(cmd);
129 spin_unlock_irq(cmd->device->host->host_lock);
138 static struct scsi_host_template driver_template = {
139 .proc_name = "MVME147",
140 .name = "MVME147 built-in SCSI",
141 .detect = mvme147_detect,
142 .release = mvme147_release,
143 .queuecommand = wd33c93_queuecommand,
144 .eh_abort_handler = wd33c93_abort,
145 .eh_bus_reset_handler = mvme147_bus_reset,
146 .eh_host_reset_handler = wd33c93_host_reset,
147 .can_queue = CAN_QUEUE,
149 .sg_tablesize = SG_ALL,
150 .cmd_per_lun = CMD_PER_LUN,
151 .use_clustering = ENABLE_CLUSTERING
155 #include "scsi_module.c"
157 int mvme147_release(struct Scsi_Host *instance)
160 /* XXX Make sure DMA is stopped! */
161 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
162 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);