blob: be41aadccae569918dd7259c5290133bd1cf3997 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/interrupt.h>
5
6#include <asm/page.h>
7#include <asm/pgtable.h>
8#include <asm/mvme147hw.h>
9#include <asm/irq.h>
10
11#include "scsi.h"
12#include <scsi/scsi_host.h>
13#include "wd33c93.h"
14#include "mvme147.h"
15
16#include<linux/stat.h>
17
18#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
19
20static struct Scsi_Host *mvme147_host = NULL;
21
David Howells7d12e782006-10-05 14:55:46 +010022static irqreturn_t mvme147_intr (int irq, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -070023{
24 if (irq == MVME147_IRQ_SCSI_PORT)
25 wd33c93_intr (mvme147_host);
26 else
27 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
28 return IRQ_HANDLED;
29}
30
Henrik Kretzschmar65396412006-09-12 23:49:33 +020031static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
Linus Torvalds1da177e2005-04-16 15:20:36 -070032{
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
Henrik Kretzschmar65396412006-09-12 23:49:33 +020059static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 int status)
61{
62 m147_pcc->dma_cntrl = 0;
63}
64
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +010065int mvme147_detect(struct scsi_host_template *tpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
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
Henrik Kretzschmar65396412006-09-12 23:49:33 +0200114static int mvme147_bus_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115{
116 /* FIXME perform bus-specific reset */
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400117
Jeff Garzik df0ae242005-05-28 07:57:14 -0400118 /* FIXME 2: kill this function, and let midlayer fallback to
119 the same result, calling wd33c93_host_reset() */
120
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400121 spin_lock_irq(cmd->device->host->host_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 wd33c93_host_reset(cmd);
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400123 spin_unlock_irq(cmd->device->host->host_lock);
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 return SUCCESS;
126}
127
128#define HOSTS_C
129
130#include "mvme147.h"
131
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100132static struct scsi_host_template driver_template = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 .proc_name = "MVME147",
134 .name = "MVME147 built-in SCSI",
135 .detect = mvme147_detect,
136 .release = mvme147_release,
137 .queuecommand = wd33c93_queuecommand,
138 .eh_abort_handler = wd33c93_abort,
139 .eh_bus_reset_handler = mvme147_bus_reset,
140 .eh_host_reset_handler = wd33c93_host_reset,
141 .can_queue = CAN_QUEUE,
142 .this_id = 7,
143 .sg_tablesize = SG_ALL,
144 .cmd_per_lun = CMD_PER_LUN,
145 .use_clustering = ENABLE_CLUSTERING
146};
147
148
149#include "scsi_module.c"
150
151int mvme147_release(struct Scsi_Host *instance)
152{
153#ifdef MODULE
154 /* XXX Make sure DMA is stopped! */
155 wd33c93_release();
156 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
157 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
158#endif
159 return 1;
160}