a3000.c (900e8d6b871a986f5adfa0e71112b8b9face177e) a3000.c (21351013402ab4556d1ef62aed6cbe8dfb809f77)
1#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/slab.h>
4#include <linux/blkdev.h>
5#include <linux/ioport.h>
6#include <linux/init.h>
7#include <linux/spinlock.h>
8#include <linux/interrupt.h>

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14#include <asm/amigahw.h>
15#include <asm/irq.h>
16
17#include "scsi.h"
18#include <scsi/scsi_host.h>
19#include "wd33c93.h"
20#include "a3000.h"
21
1#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/slab.h>
4#include <linux/blkdev.h>
5#include <linux/ioport.h>
6#include <linux/init.h>
7#include <linux/spinlock.h>
8#include <linux/interrupt.h>

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14#include <asm/amigahw.h>
15#include <asm/irq.h>
16
17#include "scsi.h"
18#include <scsi/scsi_host.h>
19#include "wd33c93.h"
20#include "a3000.h"
21
22#include<linux/stat.h>
22#include <linux/stat.h>
23
23
24#define DMA(ptr) ((a3000_scsiregs *)((ptr)->base))
25#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
26
24
25#define DMA(ptr) ((a3000_scsiregs *)((ptr)->base))
26#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
27
27static struct Scsi_Host *a3000_host = NULL;
28
29static int a3000_release(struct Scsi_Host *instance);
30
28static struct Scsi_Host *a3000_host = NULL;
29
30static int a3000_release(struct Scsi_Host *instance);
31
31static irqreturn_t a3000_intr (int irq, void *dummy)
32static irqreturn_t a3000_intr(int irq, void *dummy)
32{
33 unsigned long flags;
34 unsigned int status = DMA(a3000_host)->ISTR;
35
36 if (!(status & ISTR_INT_P))
37 return IRQ_NONE;
33{
34 unsigned long flags;
35 unsigned int status = DMA(a3000_host)->ISTR;
36
37 if (!(status & ISTR_INT_P))
38 return IRQ_NONE;
38 if (status & ISTR_INTS)
39 {
39 if (status & ISTR_INTS) {
40 spin_lock_irqsave(a3000_host->host_lock, flags);
40 spin_lock_irqsave(a3000_host->host_lock, flags);
41 wd33c93_intr (a3000_host);
41 wd33c93_intr(a3000_host);
42 spin_unlock_irqrestore(a3000_host->host_lock, flags);
43 return IRQ_HANDLED;
44 }
45 printk("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);
46 return IRQ_NONE;
47}
48
49static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
50{
42 spin_unlock_irqrestore(a3000_host->host_lock, flags);
43 return IRQ_HANDLED;
44 }
45 printk("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);
46 return IRQ_NONE;
47}
48
49static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
50{
51 unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
52 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
51 unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
52 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
53
53
54 /*
55 * if the physical address has the wrong alignment, or if
56 * physical address is bad, or if it is a write and at the
57 * end of a physical memory chunk, then allocate a bounce
58 * buffer
59 */
60 if (addr & A3000_XFER_MASK)
61 {
62 HDATA(a3000_host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
63 & ~0x1ff;
64 HDATA(a3000_host)->dma_bounce_buffer =
65 kmalloc (HDATA(a3000_host)->dma_bounce_len, GFP_KERNEL);
66
67 /* can't allocate memory; use PIO */
68 if (!HDATA(a3000_host)->dma_bounce_buffer) {
69 HDATA(a3000_host)->dma_bounce_len = 0;
70 return 1;
71 }
54 /*
55 * if the physical address has the wrong alignment, or if
56 * physical address is bad, or if it is a write and at the
57 * end of a physical memory chunk, then allocate a bounce
58 * buffer
59 */
60 if (addr & A3000_XFER_MASK) {
61 HDATA(a3000_host)->dma_bounce_len =
62 (cmd->SCp.this_residual + 511) & ~0x1ff;
63 HDATA(a3000_host)->dma_bounce_buffer =
64 kmalloc(HDATA(a3000_host)->dma_bounce_len, GFP_KERNEL);
72
65
73 if (!dir_in) {
74 /* copy to bounce buffer for a write */
75 memcpy (HDATA(a3000_host)->dma_bounce_buffer,
76 cmd->SCp.ptr, cmd->SCp.this_residual);
77 }
66 /* can't allocate memory; use PIO */
67 if (!HDATA(a3000_host)->dma_bounce_buffer) {
68 HDATA(a3000_host)->dma_bounce_len = 0;
69 return 1;
70 }
78
71
79 addr = virt_to_bus(HDATA(a3000_host)->dma_bounce_buffer);
80 }
72 if (!dir_in) {
73 /* copy to bounce buffer for a write */
74 memcpy(HDATA(a3000_host)->dma_bounce_buffer,
75 cmd->SCp.ptr, cmd->SCp.this_residual);
76 }
81
77
82 /* setup dma direction */
83 if (!dir_in)
84 cntr |= CNTR_DDIR;
78 addr = virt_to_bus(HDATA(a3000_host)->dma_bounce_buffer);
79 }
85
80
86 /* remember direction */
87 HDATA(a3000_host)->dma_dir = dir_in;
81 /* setup dma direction */
82 if (!dir_in)
83 cntr |= CNTR_DDIR;
88
84
89 DMA(a3000_host)->CNTR = cntr;
85 /* remember direction */
86 HDATA(a3000_host)->dma_dir = dir_in;
90
87
91 /* setup DMA *physical* address */
92 DMA(a3000_host)->ACR = addr;
88 DMA(a3000_host)->CNTR = cntr;
93
89
94 if (dir_in)
95 /* invalidate any cache */
96 cache_clear (addr, cmd->SCp.this_residual);
97 else
98 /* push any dirty cache */
99 cache_push (addr, cmd->SCp.this_residual);
90 /* setup DMA *physical* address */
91 DMA(a3000_host)->ACR = addr;
100
92
101 /* start DMA */
102 mb(); /* make sure setup is completed */
103 DMA(a3000_host)->ST_DMA = 1;
104 mb(); /* make sure DMA has started before next IO */
93 if (dir_in) {
94 /* invalidate any cache */
95 cache_clear(addr, cmd->SCp.this_residual);
96 } else {
97 /* push any dirty cache */
98 cache_push(addr, cmd->SCp.this_residual);
99 }
105
100
106 /* return success */
107 return 0;
101 /* start DMA */
102 mb(); /* make sure setup is completed */
103 DMA(a3000_host)->ST_DMA = 1;
104 mb(); /* make sure DMA has started before next IO */
105
106 /* return success */
107 return 0;
108}
109
110static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
111 int status)
112{
108}
109
110static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
111 int status)
112{
113 /* disable SCSI interrupts */
114 unsigned short cntr = CNTR_PDMD;
113 /* disable SCSI interrupts */
114 unsigned short cntr = CNTR_PDMD;
115
115
116 if (!HDATA(instance)->dma_dir)
117 cntr |= CNTR_DDIR;
116 if (!HDATA(instance)->dma_dir)
117 cntr |= CNTR_DDIR;
118
118
119 DMA(instance)->CNTR = cntr;
120 mb(); /* make sure CNTR is updated before next IO */
119 DMA(instance)->CNTR = cntr;
120 mb(); /* make sure CNTR is updated before next IO */
121
121
122 /* flush if we were reading */
123 if (HDATA(instance)->dma_dir) {
124 DMA(instance)->FLUSH = 1;
125 mb(); /* don't allow prefetch */
126 while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
127 barrier();
128 mb(); /* no IO until FLUSH is done */
129 }
122 /* flush if we were reading */
123 if (HDATA(instance)->dma_dir) {
124 DMA(instance)->FLUSH = 1;
125 mb(); /* don't allow prefetch */
126 while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
127 barrier();
128 mb(); /* no IO until FLUSH is done */
129 }
130
130
131 /* clear a possible interrupt */
132 /* I think that this CINT is only necessary if you are
133 * using the terminal count features. HM 7 Mar 1994
134 */
135 DMA(instance)->CINT = 1;
131 /* clear a possible interrupt */
132 /* I think that this CINT is only necessary if you are
133 * using the terminal count features. HM 7 Mar 1994
134 */
135 DMA(instance)->CINT = 1;
136
136
137 /* stop DMA */
138 DMA(instance)->SP_DMA = 1;
139 mb(); /* make sure DMA is stopped before next IO */
137 /* stop DMA */
138 DMA(instance)->SP_DMA = 1;
139 mb(); /* make sure DMA is stopped before next IO */
140
140
141 /* restore the CONTROL bits (minus the direction flag) */
142 DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
143 mb(); /* make sure CNTR is updated before next IO */
141 /* restore the CONTROL bits (minus the direction flag) */
142 DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
143 mb(); /* make sure CNTR is updated before next IO */
144
144
145 /* copy from a bounce buffer, if necessary */
146 if (status && HDATA(instance)->dma_bounce_buffer) {
147 if (SCpnt) {
148 if (HDATA(instance)->dma_dir && SCpnt)
149 memcpy (SCpnt->SCp.ptr,
150 HDATA(instance)->dma_bounce_buffer,
151 SCpnt->SCp.this_residual);
152 kfree (HDATA(instance)->dma_bounce_buffer);
153 HDATA(instance)->dma_bounce_buffer = NULL;
154 HDATA(instance)->dma_bounce_len = 0;
155 } else {
156 kfree (HDATA(instance)->dma_bounce_buffer);
157 HDATA(instance)->dma_bounce_buffer = NULL;
158 HDATA(instance)->dma_bounce_len = 0;
145 /* copy from a bounce buffer, if necessary */
146 if (status && HDATA(instance)->dma_bounce_buffer) {
147 if (SCpnt) {
148 if (HDATA(instance)->dma_dir && SCpnt)
149 memcpy(SCpnt->SCp.ptr,
150 HDATA(instance)->dma_bounce_buffer,
151 SCpnt->SCp.this_residual);
152 kfree(HDATA(instance)->dma_bounce_buffer);
153 HDATA(instance)->dma_bounce_buffer = NULL;
154 HDATA(instance)->dma_bounce_len = 0;
155 } else {
156 kfree(HDATA(instance)->dma_bounce_buffer);
157 HDATA(instance)->dma_bounce_buffer = NULL;
158 HDATA(instance)->dma_bounce_len = 0;
159 }
159 }
160 }
160 }
161}
162
163static int __init a3000_detect(struct scsi_host_template *tpnt)
164{
161}
162
163static int __init a3000_detect(struct scsi_host_template *tpnt)
164{
165 wd33c93_regs regs;
165 wd33c93_regs regs;
166
166
167 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(A3000_SCSI))
168 return 0;
169 if (!request_mem_region(0xDD0000, 256, "wd33c93"))
170 return 0;
167 if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(A3000_SCSI))
168 return 0;
169 if (!request_mem_region(0xDD0000, 256, "wd33c93"))
170 return 0;
171
171
172 tpnt->proc_name = "A3000";
173 tpnt->proc_info = &wd33c93_proc_info;
172 tpnt->proc_name = "A3000";
173 tpnt->proc_info = &wd33c93_proc_info;
174
174
175 a3000_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
176 if (a3000_host == NULL)
177 goto fail_register;
175 a3000_host = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
176 if (a3000_host == NULL)
177 goto fail_register;
178
178
179 a3000_host->base = ZTWO_VADDR(0xDD0000);
180 a3000_host->irq = IRQ_AMIGA_PORTS;
181 DMA(a3000_host)->DAWR = DAWR_A3000;
182 regs.SASR = &(DMA(a3000_host)->SASR);
183 regs.SCMD = &(DMA(a3000_host)->SCMD);
184 HDATA(a3000_host)->no_sync = 0xff;
185 HDATA(a3000_host)->fast = 0;
186 HDATA(a3000_host)->dma_mode = CTRL_DMA;
187 wd33c93_init(a3000_host, regs, dma_setup, dma_stop, WD33C93_FS_12_15);
188 if (request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED, "A3000 SCSI",
189 a3000_intr))
190 goto fail_irq;
191 DMA(a3000_host)->CNTR = CNTR_PDMD | CNTR_INTEN;
179 a3000_host->base = ZTWO_VADDR(0xDD0000);
180 a3000_host->irq = IRQ_AMIGA_PORTS;
181 DMA(a3000_host)->DAWR = DAWR_A3000;
182 regs.SASR = &(DMA(a3000_host)->SASR);
183 regs.SCMD = &(DMA(a3000_host)->SCMD);
184 HDATA(a3000_host)->no_sync = 0xff;
185 HDATA(a3000_host)->fast = 0;
186 HDATA(a3000_host)->dma_mode = CTRL_DMA;
187 wd33c93_init(a3000_host, regs, dma_setup, dma_stop, WD33C93_FS_12_15);
188 if (request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED, "A3000 SCSI",
189 a3000_intr))
190 goto fail_irq;
191 DMA(a3000_host)->CNTR = CNTR_PDMD | CNTR_INTEN;
192
192
193 return 1;
193 return 1;
194
195fail_irq:
194
195fail_irq:
196 scsi_unregister(a3000_host);
196 scsi_unregister(a3000_host);
197fail_register:
197fail_register:
198 release_mem_region(0xDD0000, 256);
199 return 0;
198 release_mem_region(0xDD0000, 256);
199 return 0;
200}
201
202static int a3000_bus_reset(struct scsi_cmnd *cmd)
203{
204 /* FIXME perform bus-specific reset */
200}
201
202static int a3000_bus_reset(struct scsi_cmnd *cmd)
203{
204 /* FIXME perform bus-specific reset */
205
205
206 /* FIXME 2: kill this entire function, which should
207 cause mid-layer to call wd33c93_host_reset anyway? */
208
209 spin_lock_irq(cmd->device->host->host_lock);
210 wd33c93_host_reset(cmd);
211 spin_unlock_irq(cmd->device->host->host_lock);
212
213 return SUCCESS;

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231 .use_clustering = ENABLE_CLUSTERING
232};
233
234
235#include "scsi_module.c"
236
237static int a3000_release(struct Scsi_Host *instance)
238{
206 /* FIXME 2: kill this entire function, which should
207 cause mid-layer to call wd33c93_host_reset anyway? */
208
209 spin_lock_irq(cmd->device->host->host_lock);
210 wd33c93_host_reset(cmd);
211 spin_unlock_irq(cmd->device->host->host_lock);
212
213 return SUCCESS;

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231 .use_clustering = ENABLE_CLUSTERING
232};
233
234
235#include "scsi_module.c"
236
237static int a3000_release(struct Scsi_Host *instance)
238{
239 DMA(instance)->CNTR = 0;
240 release_mem_region(0xDD0000, 256);
241 free_irq(IRQ_AMIGA_PORTS, a3000_intr);
242 return 1;
239 DMA(instance)->CNTR = 0;
240 release_mem_region(0xDD0000, 256);
241 free_irq(IRQ_AMIGA_PORTS, a3000_intr);
242 return 1;
243}
244
245MODULE_LICENSE("GPL");
243}
244
245MODULE_LICENSE("GPL");