1 #include <linux/types.h>
4 #include <linux/sched.h>
5 #include <linux/version.h>
6 #include <linux/init.h>
10 #include <asm/pgtable.h>
11 #include <asm/amigaints.h>
12 #include <asm/amigahw.h>
13 #include <linux/zorro.h>
15 #include <linux/spinlock.h>
22 #include<linux/stat.h>
24 #define DMA(ptr) ((a2091_scsiregs *)((ptr)->base))
25 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
27 static struct Scsi_Host *first_instance = NULL;
28 static Scsi_Host_Template *a2091_template;
30 static void a2091_intr (int irq, void *dummy, struct pt_regs *fp)
34 struct Scsi_Host *instance;
35 for (instance = first_instance; instance &&
36 instance->hostt == a2091_template; instance = instance->next)
38 status = DMA(instance)->ISTR;
39 if (!(status & (ISTR_INT_F|ISTR_INT_P)))
42 if (status & ISTR_INTS) {
43 spin_lock_irqsave(&io_request_lock, flags);
44 wd33c93_intr (instance);
45 spin_unlock_irqrestore(&io_request_lock, flags);
50 static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
52 unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
53 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
54 struct Scsi_Host *instance = cmd->host;
56 /* don't allow DMA if the physical address is bad */
57 if (addr & A2091_XFER_MASK ||
58 (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
60 HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511)
62 HDATA(instance)->dma_bounce_buffer =
63 scsi_malloc (HDATA(instance)->dma_bounce_len);
65 /* can't allocate memory; use PIO */
66 if (!HDATA(instance)->dma_bounce_buffer) {
67 HDATA(instance)->dma_bounce_len = 0;
71 /* get the physical address of the bounce buffer */
72 addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer);
74 /* the bounce buffer may not be in the first 16M of physmem */
75 if (addr & A2091_XFER_MASK) {
76 /* we could use chipmem... maybe later */
77 scsi_free (HDATA(instance)->dma_bounce_buffer,
78 HDATA(instance)->dma_bounce_len);
79 HDATA(instance)->dma_bounce_buffer = NULL;
80 HDATA(instance)->dma_bounce_len = 0;
85 /* copy to bounce buffer for a write */
88 panic ("scsi%ddma: incomplete s/g support",
91 memcpy (HDATA(instance)->dma_bounce_buffer,
92 cmd->SCp.ptr, cmd->SCp.this_residual);
95 memcpy (HDATA(instance)->dma_bounce_buffer,
96 cmd->request_buffer, cmd->request_bufflen);
100 /* setup dma direction */
104 /* remember direction */
105 HDATA(cmd->host)->dma_dir = dir_in;
107 DMA(cmd->host)->CNTR = cntr;
109 /* setup DMA *physical* address */
110 DMA(cmd->host)->ACR = addr;
113 /* invalidate any cache */
114 cache_clear (addr, cmd->SCp.this_residual);
116 /* push any dirty cache */
117 cache_push (addr, cmd->SCp.this_residual);
120 DMA(cmd->host)->ST_DMA = 1;
126 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
129 /* disable SCSI interrupts */
130 unsigned short cntr = CNTR_PDMD;
132 if (!HDATA(instance)->dma_dir)
135 /* disable SCSI interrupts */
136 DMA(instance)->CNTR = cntr;
138 /* flush if we were reading */
139 if (HDATA(instance)->dma_dir) {
140 DMA(instance)->FLUSH = 1;
141 while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
145 /* clear a possible interrupt */
146 DMA(instance)->CINT = 1;
149 DMA(instance)->SP_DMA = 1;
151 /* restore the CONTROL bits (minus the direction flag) */
152 DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
154 /* copy from a bounce buffer, if necessary */
155 if (status && HDATA(instance)->dma_bounce_buffer) {
156 if (SCpnt && SCpnt->use_sg) {
158 panic ("scsi%d: incomplete s/g support",
161 if( HDATA(instance)->dma_dir )
162 memcpy (SCpnt->SCp.ptr,
163 HDATA(instance)->dma_bounce_buffer,
164 SCpnt->SCp.this_residual);
165 scsi_free (HDATA(instance)->dma_bounce_buffer,
166 HDATA(instance)->dma_bounce_len);
167 HDATA(instance)->dma_bounce_buffer = NULL;
168 HDATA(instance)->dma_bounce_len = 0;
172 if (HDATA(instance)->dma_dir && SCpnt)
173 memcpy (SCpnt->request_buffer,
174 HDATA(instance)->dma_bounce_buffer,
175 SCpnt->request_bufflen);
177 scsi_free (HDATA(instance)->dma_bounce_buffer,
178 HDATA(instance)->dma_bounce_len);
179 HDATA(instance)->dma_bounce_buffer = NULL;
180 HDATA(instance)->dma_bounce_len = 0;
185 static int num_a2091 = 0;
187 int __init a2091_detect(Scsi_Host_Template *tpnt)
189 static unsigned char called = 0;
190 struct Scsi_Host *instance;
191 unsigned long address;
192 struct zorro_dev *z = NULL;
195 if (!MACH_IS_AMIGA || called)
199 tpnt->proc_name = "A2091";
200 tpnt->proc_info = &wd33c93_proc_info;
202 while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
203 if (z->id != ZORRO_PROD_CBM_A590_A2091_1 &&
204 z->id != ZORRO_PROD_CBM_A590_A2091_2)
206 address = z->resource.start;
207 if (!request_mem_region(address, 256, "wd33c93"))
210 instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata));
211 if (instance == NULL) {
212 release_mem_region(address, 256);
215 instance->base = ZTWO_VADDR(address);
216 instance->irq = IRQ_AMIGA_PORTS;
217 instance->unique_id = z->slotaddr;
218 DMA(instance)->DAWR = DAWR_A2091;
219 regs.SASR = &(DMA(instance)->SASR);
220 regs.SCMD = &(DMA(instance)->SCMD);
221 wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
222 if (num_a2091++ == 0) {
223 first_instance = instance;
224 a2091_template = instance->hostt;
225 request_irq(IRQ_AMIGA_PORTS, a2091_intr, SA_SHIRQ, "A2091 SCSI",
228 DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
236 static Scsi_Host_Template driver_template = A2091_SCSI;
238 #include "scsi_module.c"
240 int a2091_release(struct Scsi_Host *instance)
243 DMA(instance)->CNTR = 0;
244 release_mem_region(ZTWO_PADDR(instance->base), 256);
245 if (--num_a2091 == 0)
246 free_irq(IRQ_AMIGA_PORTS, a2091_intr);
252 MODULE_LICENSE("GPL");