1 #include <linux/types.h>
2 #include <linux/mm.h>
3 #include <linux/blk.h>
4 #include <linux/sched.h>
5 #include <linux/version.h>
6
7 #include <asm/page.h>
8 #include <asm/pgtable.h>
9 #include <asm/mvme147hw.h>
10 #include <asm/irq.h>
11
12 #include "scsi.h"
13 #include "hosts.h"
14 #include "wd33c93.h"
15 #include "mvme147.h"
16
17 #include<linux/stat.h>
18
19 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
20
21 static struct Scsi_Host *mvme147_host = NULL;
22
mvme147_intr(int irq,void * dummy,struct pt_regs * fp)23 static void mvme147_intr (int irq, void *dummy, struct pt_regs *fp)
24 {
25 if (irq == MVME147_IRQ_SCSI_PORT)
26 wd33c93_intr (mvme147_host);
27 else
28 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
29 }
30
dma_setup(Scsi_Cmnd * cmd,int dir_in)31 static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
32 {
33 unsigned char flags = 0x01;
34 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
35
36 /* setup dma direction */
37 if (!dir_in)
38 flags |= 0x04;
39
40 /* remember direction */
41 HDATA(mvme147_host)->dma_dir = dir_in;
42
43 if (dir_in)
44 /* invalidate any cache */
45 cache_clear (addr, cmd->SCp.this_residual);
46 else
47 /* push any dirty cache */
48 cache_push (addr, cmd->SCp.this_residual);
49
50 /* start DMA */
51 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24);
52 m147_pcc->dma_dadr = addr;
53 m147_pcc->dma_cntrl = flags;
54
55 /* return success */
56 return 0;
57 }
58
dma_stop(struct Scsi_Host * instance,Scsi_Cmnd * SCpnt,int status)59 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
60 int status)
61 {
62 m147_pcc->dma_cntrl = 0;
63 }
64
mvme147_detect(Scsi_Host_Template * tpnt)65 int mvme147_detect(Scsi_Host_Template *tpnt)
66 {
67 static unsigned char called = 0;
68 wd33c93_regs regs;
69
70 if (!MACH_IS_MVME147 || called)
71 return 0;
72 called++;
73
74 tpnt->proc_name = "MVME147";
75 tpnt->proc_info = &wd33c93_proc_info;
76
77 mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
78 if (!mvme147_host)
79 goto err_out;
80
81 mvme147_host->base = 0xfffe4000;
82 mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
83 regs.SASR = (volatile unsigned char *)0xfffe4000;
84 regs.SCMD = (volatile unsigned char *)0xfffe4001;
85 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
86
87 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
88 goto err_unregister;
89 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
90 goto err_free_irq;
91 #if 0 /* Disabled; causes problems booting */
92 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
93 udelay(100);
94 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
95 udelay(2000);
96 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
97 #endif
98 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
99
100 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
101 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
102
103 return 1;
104
105 err_free_irq:
106 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
107 err_unregister:
108 wd33c93_release();
109 scsi_unregister(mvme147_host);
110 err_out:
111 return 0;
112 }
113
114 #define HOSTS_C
115
116 #include "mvme147.h"
117
118 static Scsi_Host_Template driver_template = MVME147_SCSI;
119
120 #include "scsi_module.c"
121
mvme147_release(struct Scsi_Host * instance)122 int mvme147_release(struct Scsi_Host *instance)
123 {
124 #ifdef MODULE
125 /* XXX Make sure DMA is stopped! */
126 wd33c93_release();
127 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
128 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
129 #endif
130 return 1;
131 }
132