1 #include <linux/types.h>
2 #include <linux/mm.h>
3 #include <linux/blkdev.h>
4 #include <linux/sched.h>
5 #include <linux/version.h>
6 #include <linux/interrupt.h>
7
8 #include <asm/page.h>
9 #include <asm/pgtable.h>
10 #include <asm/mvme147hw.h>
11 #include <asm/irq.h>
12
13 #include "scsi.h"
14 #include <scsi/scsi_host.h>
15 #include "wd33c93.h"
16 #include "mvme147.h"
17
18 #include<linux/stat.h>
19
20 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
21
22 static struct Scsi_Host *mvme147_host = NULL;
23
24 static irqreturn_t mvme147_intr (int irq, void *dummy, struct pt_regs *fp)
25 {
26 if (irq == MVME147_IRQ_SCSI_PORT)
27 wd33c93_intr (mvme147_host);
28 else
29 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
30 return IRQ_HANDLED;
31 }
32
33 static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
34 {
35 unsigned char flags = 0x01;
36 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
37
38 /* setup dma direction */
39 if (!dir_in)
40 flags |= 0x04;
41
42 /* remember direction */
43 HDATA(mvme147_host)->dma_dir = dir_in;
44
45 if (dir_in)
46 /* invalidate any cache */
47 cache_clear (addr, cmd->SCp.this_residual);
48 else
49 /* push any dirty cache */
50 cache_push (addr, cmd->SCp.this_residual);
51
52 /* start DMA */
53 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24);
54 m147_pcc->dma_dadr = addr;
55 m147_pcc->dma_cntrl = flags;
56
57 /* return success */
58 return 0;
59 }
60
61 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
62 int status)
63 {
64 m147_pcc->dma_cntrl = 0;
65 }
66
67 int mvme147_detect(Scsi_Host_Template *tpnt)
68 {
69 static unsigned char called = 0;
70 wd33c93_regs regs;
71
72 if (!MACH_IS_MVME147 || called)
73 return 0;
74 called++;
75
76 tpnt->proc_name = "MVME147";
77 tpnt->proc_info = &wd33c93_proc_info;
78
79 mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
80 if (!mvme147_host)
81 goto err_out;
82
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);
88
89 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
90 goto err_unregister;
91 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
92 goto err_free_irq;
93 #if 0 /* Disabled; causes problems booting */
94 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
95 udelay(100);
96 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
97 udelay(2000);
98 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
99 #endif
100 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
101
102 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
103 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
104
105 return 1;
106
107 err_free_irq:
108 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
109 err_unregister:
110 wd33c93_release();
111 scsi_unregister(mvme147_host);
112 err_out:
113 return 0;
114 }
115
116 static int mvme147_bus_reset(Scsi_Cmnd *cmd)
117 {
118 /* FIXME perform bus-specific reset */
119 wd33c93_host_reset(cmd);
120 return SUCCESS;
121 }
122
123 #define HOSTS_C
124
125 #include "mvme147.h"
126
127 static Scsi_Host_Template driver_template = {
128 .proc_name = "MVME147",
129 .name = "MVME147 built-in SCSI",
130 .detect = mvme147_detect,
131 .release = mvme147_release,
132 .queuecommand = wd33c93_queuecommand,
133 .eh_abort_handler = wd33c93_abort,
134 .eh_bus_reset_handler = mvme147_bus_reset,
135 .eh_host_reset_handler = wd33c93_host_reset,
136 .can_queue = CAN_QUEUE,
137 .this_id = 7,
138 .sg_tablesize = SG_ALL,
139 .cmd_per_lun = CMD_PER_LUN,
140 .use_clustering = ENABLE_CLUSTERING
141 };
142
143
144 #include "scsi_module.c"
145
146 int mvme147_release(struct Scsi_Host *instance)
147 {
148 #ifdef MODULE
149 /* XXX Make sure DMA is stopped! */
150 wd33c93_release();
151 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
152 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
153 #endif
154 return 1;
155 }
156
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