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1da177e4 LT |
1 | #include <linux/types.h> |
2 | #include <linux/mm.h> | |
3 | #include <linux/blkdev.h> | |
4 | #include <linux/sched.h> | |
1da177e4 LT |
5 | #include <linux/init.h> |
6 | #include <linux/interrupt.h> | |
7 | ||
8 | #include <asm/setup.h> | |
9 | #include <asm/page.h> | |
10 | #include <asm/pgtable.h> | |
11 | #include <asm/amigaints.h> | |
12 | #include <asm/amigahw.h> | |
13 | #include <linux/zorro.h> | |
14 | #include <asm/irq.h> | |
15 | #include <linux/spinlock.h> | |
16 | ||
17 | #include "scsi.h" | |
18 | #include <scsi/scsi_host.h> | |
19 | #include "wd33c93.h" | |
20 | #include "a2091.h" | |
21 | ||
22 | #include<linux/stat.h> | |
23 | ||
24 | #define DMA(ptr) ((a2091_scsiregs *)((ptr)->base)) | |
25 | #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) | |
26 | ||
27 | static irqreturn_t a2091_intr (int irq, void *_instance, struct pt_regs *fp) | |
28 | { | |
29 | unsigned long flags; | |
30 | unsigned int status; | |
31 | struct Scsi_Host *instance = (struct Scsi_Host *)_instance; | |
32 | ||
33 | status = DMA(instance)->ISTR; | |
34 | if (!(status & (ISTR_INT_F|ISTR_INT_P)) || !(status & ISTR_INTS)) | |
35 | return IRQ_NONE; | |
36 | ||
37 | spin_lock_irqsave(instance->host_lock, flags); | |
38 | wd33c93_intr(instance); | |
39 | spin_unlock_irqrestore(instance->host_lock, flags); | |
40 | return IRQ_HANDLED; | |
41 | } | |
42 | ||
43 | static int dma_setup (Scsi_Cmnd *cmd, int dir_in) | |
44 | { | |
45 | unsigned short cntr = CNTR_PDMD | CNTR_INTEN; | |
46 | unsigned long addr = virt_to_bus(cmd->SCp.ptr); | |
47 | struct Scsi_Host *instance = cmd->device->host; | |
48 | ||
49 | /* don't allow DMA if the physical address is bad */ | |
50 | if (addr & A2091_XFER_MASK || | |
51 | (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual))) | |
52 | { | |
53 | HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511) | |
54 | & ~0x1ff; | |
55 | HDATA(instance)->dma_bounce_buffer = | |
56 | kmalloc (HDATA(instance)->dma_bounce_len, GFP_KERNEL); | |
57 | ||
58 | /* can't allocate memory; use PIO */ | |
59 | if (!HDATA(instance)->dma_bounce_buffer) { | |
60 | HDATA(instance)->dma_bounce_len = 0; | |
61 | return 1; | |
62 | } | |
63 | ||
64 | /* get the physical address of the bounce buffer */ | |
65 | addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer); | |
66 | ||
67 | /* the bounce buffer may not be in the first 16M of physmem */ | |
68 | if (addr & A2091_XFER_MASK) { | |
69 | /* we could use chipmem... maybe later */ | |
70 | kfree (HDATA(instance)->dma_bounce_buffer); | |
71 | HDATA(instance)->dma_bounce_buffer = NULL; | |
72 | HDATA(instance)->dma_bounce_len = 0; | |
73 | return 1; | |
74 | } | |
75 | ||
76 | if (!dir_in) { | |
77 | /* copy to bounce buffer for a write */ | |
78 | if (cmd->use_sg) | |
79 | #if 0 | |
80 | panic ("scsi%ddma: incomplete s/g support", | |
81 | instance->host_no); | |
82 | #else | |
83 | memcpy (HDATA(instance)->dma_bounce_buffer, | |
84 | cmd->SCp.ptr, cmd->SCp.this_residual); | |
85 | #endif | |
86 | else | |
87 | memcpy (HDATA(instance)->dma_bounce_buffer, | |
88 | cmd->request_buffer, cmd->request_bufflen); | |
89 | } | |
90 | } | |
91 | ||
92 | /* setup dma direction */ | |
93 | if (!dir_in) | |
94 | cntr |= CNTR_DDIR; | |
95 | ||
96 | /* remember direction */ | |
97 | HDATA(cmd->device->host)->dma_dir = dir_in; | |
98 | ||
99 | DMA(cmd->device->host)->CNTR = cntr; | |
100 | ||
101 | /* setup DMA *physical* address */ | |
102 | DMA(cmd->device->host)->ACR = addr; | |
103 | ||
104 | if (dir_in){ | |
105 | /* invalidate any cache */ | |
106 | cache_clear (addr, cmd->SCp.this_residual); | |
107 | }else{ | |
108 | /* push any dirty cache */ | |
109 | cache_push (addr, cmd->SCp.this_residual); | |
110 | } | |
111 | /* start DMA */ | |
112 | DMA(cmd->device->host)->ST_DMA = 1; | |
113 | ||
114 | /* return success */ | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt, | |
119 | int status) | |
120 | { | |
121 | /* disable SCSI interrupts */ | |
122 | unsigned short cntr = CNTR_PDMD; | |
123 | ||
124 | if (!HDATA(instance)->dma_dir) | |
125 | cntr |= CNTR_DDIR; | |
126 | ||
127 | /* disable SCSI interrupts */ | |
128 | DMA(instance)->CNTR = cntr; | |
129 | ||
130 | /* flush if we were reading */ | |
131 | if (HDATA(instance)->dma_dir) { | |
132 | DMA(instance)->FLUSH = 1; | |
133 | while (!(DMA(instance)->ISTR & ISTR_FE_FLG)) | |
134 | ; | |
135 | } | |
136 | ||
137 | /* clear a possible interrupt */ | |
138 | DMA(instance)->CINT = 1; | |
139 | ||
140 | /* stop DMA */ | |
141 | DMA(instance)->SP_DMA = 1; | |
142 | ||
143 | /* restore the CONTROL bits (minus the direction flag) */ | |
144 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; | |
145 | ||
146 | /* copy from a bounce buffer, if necessary */ | |
147 | if (status && HDATA(instance)->dma_bounce_buffer) { | |
148 | if (SCpnt && SCpnt->use_sg) { | |
149 | #if 0 | |
150 | panic ("scsi%d: incomplete s/g support", | |
151 | instance->host_no); | |
152 | #else | |
153 | if( HDATA(instance)->dma_dir ) | |
154 | memcpy (SCpnt->SCp.ptr, | |
155 | HDATA(instance)->dma_bounce_buffer, | |
156 | SCpnt->SCp.this_residual); | |
157 | kfree (HDATA(instance)->dma_bounce_buffer); | |
158 | HDATA(instance)->dma_bounce_buffer = NULL; | |
159 | HDATA(instance)->dma_bounce_len = 0; | |
160 | ||
161 | #endif | |
162 | } else { | |
163 | if (HDATA(instance)->dma_dir && SCpnt) | |
164 | memcpy (SCpnt->request_buffer, | |
165 | HDATA(instance)->dma_bounce_buffer, | |
166 | SCpnt->request_bufflen); | |
167 | ||
168 | kfree (HDATA(instance)->dma_bounce_buffer); | |
169 | HDATA(instance)->dma_bounce_buffer = NULL; | |
170 | HDATA(instance)->dma_bounce_len = 0; | |
171 | } | |
172 | } | |
173 | } | |
174 | ||
d0be4a7d | 175 | int __init a2091_detect(struct scsi_host_template *tpnt) |
1da177e4 LT |
176 | { |
177 | static unsigned char called = 0; | |
178 | struct Scsi_Host *instance; | |
179 | unsigned long address; | |
180 | struct zorro_dev *z = NULL; | |
181 | wd33c93_regs regs; | |
182 | int num_a2091 = 0; | |
183 | ||
184 | if (!MACH_IS_AMIGA || called) | |
185 | return 0; | |
186 | called = 1; | |
187 | ||
188 | tpnt->proc_name = "A2091"; | |
189 | tpnt->proc_info = &wd33c93_proc_info; | |
190 | ||
191 | while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { | |
192 | if (z->id != ZORRO_PROD_CBM_A590_A2091_1 && | |
193 | z->id != ZORRO_PROD_CBM_A590_A2091_2) | |
194 | continue; | |
195 | address = z->resource.start; | |
196 | if (!request_mem_region(address, 256, "wd33c93")) | |
197 | continue; | |
198 | ||
199 | instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata)); | |
200 | if (instance == NULL) { | |
201 | release_mem_region(address, 256); | |
202 | continue; | |
203 | } | |
204 | instance->base = ZTWO_VADDR(address); | |
205 | instance->irq = IRQ_AMIGA_PORTS; | |
206 | instance->unique_id = z->slotaddr; | |
207 | DMA(instance)->DAWR = DAWR_A2091; | |
208 | regs.SASR = &(DMA(instance)->SASR); | |
209 | regs.SCMD = &(DMA(instance)->SCMD); | |
210 | wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10); | |
1d6f359a | 211 | request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED, "A2091 SCSI", |
1da177e4 LT |
212 | instance); |
213 | DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; | |
214 | num_a2091++; | |
215 | } | |
216 | ||
217 | return num_a2091; | |
218 | } | |
219 | ||
220 | static int a2091_bus_reset(Scsi_Cmnd *cmd) | |
221 | { | |
222 | /* FIXME perform bus-specific reset */ | |
68b3aa7c | 223 | |
df0ae249 JG |
224 | /* FIXME 2: kill this function, and let midlayer fall back |
225 | to the same action, calling wd33c93_host_reset() */ | |
226 | ||
68b3aa7c | 227 | spin_lock_irq(cmd->device->host->host_lock); |
1da177e4 | 228 | wd33c93_host_reset(cmd); |
68b3aa7c JG |
229 | spin_unlock_irq(cmd->device->host->host_lock); |
230 | ||
1da177e4 LT |
231 | return SUCCESS; |
232 | } | |
233 | ||
234 | #define HOSTS_C | |
235 | ||
d0be4a7d | 236 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
237 | .proc_name = "A2901", |
238 | .name = "Commodore A2091/A590 SCSI", | |
239 | .detect = a2091_detect, | |
240 | .release = a2091_release, | |
241 | .queuecommand = wd33c93_queuecommand, | |
242 | .eh_abort_handler = wd33c93_abort, | |
243 | .eh_bus_reset_handler = a2091_bus_reset, | |
244 | .eh_host_reset_handler = wd33c93_host_reset, | |
245 | .can_queue = CAN_QUEUE, | |
246 | .this_id = 7, | |
247 | .sg_tablesize = SG_ALL, | |
248 | .cmd_per_lun = CMD_PER_LUN, | |
249 | .use_clustering = DISABLE_CLUSTERING | |
250 | }; | |
251 | ||
252 | ||
253 | #include "scsi_module.c" | |
254 | ||
255 | int a2091_release(struct Scsi_Host *instance) | |
256 | { | |
257 | #ifdef MODULE | |
258 | DMA(instance)->CNTR = 0; | |
259 | release_mem_region(ZTWO_PADDR(instance->base), 256); | |
260 | free_irq(IRQ_AMIGA_PORTS, instance); | |
261 | wd33c93_release(); | |
262 | #endif | |
263 | return 1; | |
264 | } | |
265 | ||
266 | MODULE_LICENSE("GPL"); |