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path: root/drivers/scsi/mvme147.c
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Diffstat (limited to 'drivers/scsi/mvme147.c')
-rw-r--r--drivers/scsi/mvme147.c166
1 files changed, 85 insertions, 81 deletions
diff --git a/drivers/scsi/mvme147.c b/drivers/scsi/mvme147.c
index a423fcc7c11a..b236d72850d1 100644
--- a/drivers/scsi/mvme147.c
+++ b/drivers/scsi/mvme147.c
@@ -13,111 +13,115 @@
13#include "wd33c93.h" 13#include "wd33c93.h"
14#include "mvme147.h" 14#include "mvme147.h"
15 15
16#include<linux/stat.h> 16#include <linux/stat.h>
17 17
18#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) 18
19#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
19 20
20static struct Scsi_Host *mvme147_host = NULL; 21static struct Scsi_Host *mvme147_host = NULL;
21 22
22static irqreturn_t mvme147_intr (int irq, void *dummy) 23static irqreturn_t mvme147_intr(int irq, void *dummy)
23{ 24{
24 if (irq == MVME147_IRQ_SCSI_PORT) 25 if (irq == MVME147_IRQ_SCSI_PORT)
25 wd33c93_intr (mvme147_host); 26 wd33c93_intr(mvme147_host);
26 else 27 else
27 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ 28 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
28 return IRQ_HANDLED; 29 return IRQ_HANDLED;
29} 30}
30 31
31static int dma_setup(struct scsi_cmnd *cmd, int dir_in) 32static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
32{ 33{
33 unsigned char flags = 0x01; 34 unsigned char flags = 0x01;
34 unsigned long addr = virt_to_bus(cmd->SCp.ptr); 35 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
35 36
36 /* setup dma direction */ 37 /* setup dma direction */
37 if (!dir_in) 38 if (!dir_in)
38 flags |= 0x04; 39 flags |= 0x04;
39 40
40 /* remember direction */ 41 /* remember direction */
41 HDATA(mvme147_host)->dma_dir = dir_in; 42 HDATA(mvme147_host)->dma_dir = dir_in;
42 43
43 if (dir_in) 44 if (dir_in) {
44 /* invalidate any cache */ 45 /* invalidate any cache */
45 cache_clear (addr, cmd->SCp.this_residual); 46 cache_clear(addr, cmd->SCp.this_residual);
46 else 47 } else {
47 /* push any dirty cache */ 48 /* push any dirty cache */
48 cache_push (addr, cmd->SCp.this_residual); 49 cache_push(addr, cmd->SCp.this_residual);
49 50 }
50 /* start DMA */ 51
51 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24); 52 /* start DMA */
52 m147_pcc->dma_dadr = addr; 53 m147_pcc->dma_bcr = cmd->SCp.this_residual | (1 << 24);
53 m147_pcc->dma_cntrl = flags; 54 m147_pcc->dma_dadr = addr;
54 55 m147_pcc->dma_cntrl = flags;
55 /* return success */ 56
56 return 0; 57 /* return success */
58 return 0;
57} 59}
58 60
59static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, 61static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
60 int status) 62 int status)
61{ 63{
62 m147_pcc->dma_cntrl = 0; 64 m147_pcc->dma_cntrl = 0;
63} 65}
64 66
65int mvme147_detect(struct scsi_host_template *tpnt) 67int mvme147_detect(struct scsi_host_template *tpnt)
66{ 68{
67 static unsigned char called = 0; 69 static unsigned char called = 0;
68 wd33c93_regs regs; 70 wd33c93_regs regs;
69 71
70 if (!MACH_IS_MVME147 || called) 72 if (!MACH_IS_MVME147 || called)
71 return 0; 73 return 0;
72 called++; 74 called++;
73 75
74 tpnt->proc_name = "MVME147"; 76 tpnt->proc_name = "MVME147";
75 tpnt->proc_info = &wd33c93_proc_info; 77 tpnt->proc_info = &wd33c93_proc_info;
76 78
77 mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata)); 79 mvme147_host = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
78 if (!mvme147_host) 80 if (!mvme147_host)
79 goto err_out; 81 goto err_out;
80 82
81 mvme147_host->base = 0xfffe4000; 83 mvme147_host->base = 0xfffe4000;
82 mvme147_host->irq = MVME147_IRQ_SCSI_PORT; 84 mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
83 regs.SASR = (volatile unsigned char *)0xfffe4000; 85 regs.SASR = (volatile unsigned char *)0xfffe4000;
84 regs.SCMD = (volatile unsigned char *)0xfffe4001; 86 regs.SCMD = (volatile unsigned char *)0xfffe4001;
85 HDATA(mvme147_host)->no_sync = 0xff; 87 HDATA(mvme147_host)->no_sync = 0xff;
86 HDATA(mvme147_host)->fast = 0; 88 HDATA(mvme147_host)->fast = 0;
87 HDATA(mvme147_host)->dma_mode = CTRL_DMA; 89 HDATA(mvme147_host)->dma_mode = CTRL_DMA;
88 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10); 90 wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
89 91
90 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr)) 92 if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0,
91 goto err_unregister; 93 "MVME147 SCSI PORT", mvme147_intr))
92 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr)) 94 goto err_unregister;
93 goto err_free_irq; 95 if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0,
96 "MVME147 SCSI DMA", mvme147_intr))
97 goto err_free_irq;
94#if 0 /* Disabled; causes problems booting */ 98#if 0 /* Disabled; causes problems booting */
95 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */ 99 m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
96 udelay(100); 100 udelay(100);
97 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */ 101 m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
98 udelay(2000); 102 udelay(2000);
99 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */ 103 m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
100#endif 104#endif
101 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */ 105 m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
102 106
103 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */ 107 m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
104 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */ 108 m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
105 109
106 return 1; 110 return 1;
107 111
108 err_free_irq: 112err_free_irq:
109 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); 113 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
110 err_unregister: 114err_unregister:
111 scsi_unregister(mvme147_host); 115 scsi_unregister(mvme147_host);
112 err_out: 116err_out:
113 return 0; 117 return 0;
114} 118}
115 119
116static int mvme147_bus_reset(struct scsi_cmnd *cmd) 120static int mvme147_bus_reset(struct scsi_cmnd *cmd)
117{ 121{
118 /* FIXME perform bus-specific reset */ 122 /* FIXME perform bus-specific reset */
119 123
120 /* FIXME 2: kill this function, and let midlayer fallback to 124 /* FIXME 2: kill this function, and let midlayer fallback to
121 the same result, calling wd33c93_host_reset() */ 125 the same result, calling wd33c93_host_reset() */
122 126
123 spin_lock_irq(cmd->device->host->host_lock); 127 spin_lock_irq(cmd->device->host->host_lock);
@@ -153,9 +157,9 @@ static struct scsi_host_template driver_template = {
153int mvme147_release(struct Scsi_Host *instance) 157int mvme147_release(struct Scsi_Host *instance)
154{ 158{
155#ifdef MODULE 159#ifdef MODULE
156 /* XXX Make sure DMA is stopped! */ 160 /* XXX Make sure DMA is stopped! */
157 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr); 161 free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
158 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr); 162 free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
159#endif 163#endif
160 return 1; 164 return 1;
161} 165}