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
21static struct Scsi_Host *mvme147_host = NULL;
22
23static 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
31static 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
59static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
60		      int status)
61{
62    m147_pcc->dma_cntrl = 0;
63}
64
65int 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    m147_pcc->scsi_interrupt = 0x09;	/* Enable interrupt */
92
93    m147_pcc->dma_cntrl = 0x00;		/* ensure DMA is stopped */
94    m147_pcc->dma_intr = 0x89;		/* Ack and enable ints */
95
96    return 1;
97
98 err_free_irq:
99    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
100 err_unregister:
101    wd33c93_release();
102    scsi_unregister(mvme147_host);
103 err_out:
104    return 0;
105}
106
107#define HOSTS_C
108
109#include "mvme147.h"
110
111static Scsi_Host_Template driver_template = MVME147_SCSI;
112
113#include "scsi_module.c"
114
115int mvme147_release(struct Scsi_Host *instance)
116{
117#ifdef MODULE
118    wd33c93_release();
119    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
120    free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
121#endif
122    return 1;
123}
124