1 #include <linux/types.h>
2 #include <linux/mm.h>
3 #include <linux/blkdev.h>
4 #include <linux/sched.h>
5 #include <linux/version.h>
6 #include <linux/init.h>
7 #include <linux/interrupt.h>
8
9 #include <asm/setup.h>
10 #include <asm/page.h>
11 #include <asm/pgtable.h>
12 #include <asm/amigaints.h>
13 #include <asm/amigahw.h>
14 #include <linux/zorro.h>
15 #include <asm/irq.h>
16 #include <linux/spinlock.h>
17
18 #include "scsi.h"
19 #include <scsi/scsi_host.h>
20 #include "wd33c93.h"
21 #include "gvp11.h"
22
23 #include<linux/stat.h>
24
25 #define DMA(ptr) ((gvp11_scsiregs *)((ptr)->base))
26 #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
27
28 static irqreturn_t gvp11_intr (int irq, void *_instance, struct pt_regs *fp)
29 {
30 unsigned long flags;
31 unsigned int status;
32 struct Scsi_Host *instance = (struct Scsi_Host *)_instance;
33
34 status = DMA(instance)->CNTR;
35 if (!(status & GVP11_DMAC_INT_PENDING))
36 return IRQ_NONE;
37
38 spin_lock_irqsave(instance->host_lock, flags);
39 wd33c93_intr(instance);
40 spin_unlock_irqrestore(instance->host_lock, flags);
41 return IRQ_HANDLED;
42 }
43
44 static int gvp11_xfer_mask = 0;
45
46 void gvp11_setup (char *str, int *ints)
47 {
48 gvp11_xfer_mask = ints[1];
49 }
50
51 static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
52 {
53 unsigned short cntr = GVP11_DMAC_INT_ENABLE;
54 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
55 int bank_mask;
56 static int scsi_alloc_out_of_range = 0;
57
58 /* use bounce buffer if the physical address is bad */
59 if (addr & HDATA(cmd->device->host)->dma_xfer_mask ||
60 (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
61 {
62 HDATA(cmd->device->host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
63 & ~0x1ff;
64
65 if( !scsi_alloc_out_of_range ) {
66 HDATA(cmd->device->host)->dma_bounce_buffer =
67 kmalloc (HDATA(cmd->device->host)->dma_bounce_len, GFP_KERNEL);
68 HDATA(cmd->device->host)->dma_buffer_pool = BUF_SCSI_ALLOCED;
69 }
70
71 if (scsi_alloc_out_of_range ||
72 !HDATA(cmd->device->host)->dma_bounce_buffer) {
73 HDATA(cmd->device->host)->dma_bounce_buffer =
74 amiga_chip_alloc(HDATA(cmd->device->host)->dma_bounce_len,
75 "GVP II SCSI Bounce Buffer");
76
77 if(!HDATA(cmd->device->host)->dma_bounce_buffer)
78 {
79 HDATA(cmd->device->host)->dma_bounce_len = 0;
80 return 1;
81 }
82
83 HDATA(cmd->device->host)->dma_buffer_pool = BUF_CHIP_ALLOCED;
84 }
85
86 /* check if the address of the bounce buffer is OK */
87 addr = virt_to_bus(HDATA(cmd->device->host)->dma_bounce_buffer);
88
89 if (addr & HDATA(cmd->device->host)->dma_xfer_mask) {
90 /* fall back to Chip RAM if address out of range */
91 if( HDATA(cmd->device->host)->dma_buffer_pool == BUF_SCSI_ALLOCED) {
92 kfree (HDATA(cmd->device->host)->dma_bounce_buffer);
93 scsi_alloc_out_of_range = 1;
94 } else {
95 amiga_chip_free (HDATA(cmd->device->host)->dma_bounce_buffer);
96 }
97
98 HDATA(cmd->device->host)->dma_bounce_buffer =
99 amiga_chip_alloc(HDATA(cmd->device->host)->dma_bounce_len,
100 "GVP II SCSI Bounce Buffer");
101
102 if(!HDATA(cmd->device->host)->dma_bounce_buffer)
103 {
104 HDATA(cmd->device->host)->dma_bounce_len = 0;
105 return 1;
106 }
107
108 addr = virt_to_bus(HDATA(cmd->device->host)->dma_bounce_buffer);
109 HDATA(cmd->device->host)->dma_buffer_pool = BUF_CHIP_ALLOCED;
110 }
111
112 if (!dir_in) {
113 /* copy to bounce buffer for a write */
114 memcpy (HDATA(cmd->device->host)->dma_bounce_buffer,
115 cmd->SCp.ptr, cmd->SCp.this_residual);
116 }
117 }
118
119 /* setup dma direction */
120 if (!dir_in)
121 cntr |= GVP11_DMAC_DIR_WRITE;
122
123 HDATA(cmd->device->host)->dma_dir = dir_in;
124 DMA(cmd->device->host)->CNTR = cntr;
125
126 /* setup DMA *physical* address */
127 DMA(cmd->device->host)->ACR = addr;
128
129 if (dir_in)
130 /* invalidate any cache */
131 cache_clear (addr, cmd->SCp.this_residual);
132 else
133 /* push any dirty cache */
134 cache_push (addr, cmd->SCp.this_residual);
135
136 if ((bank_mask = (~HDATA(cmd->device->host)->dma_xfer_mask >> 18) & 0x01c0))
137 DMA(cmd->device->host)->BANK = bank_mask & (addr >> 18);
138
139 /* start DMA */
140 DMA(cmd->device->host)->ST_DMA = 1;
141
142 /* return success */
143 return 0;
144 }
145
146 static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
147 int status)
148 {
149 /* stop DMA */
150 DMA(instance)->SP_DMA = 1;
151 /* remove write bit from CONTROL bits */
152 DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
153
154 /* copy from a bounce buffer, if necessary */
155 if (status && HDATA(instance)->dma_bounce_buffer) {
156 if (HDATA(instance)->dma_dir && SCpnt)
157 memcpy (SCpnt->SCp.ptr,
158 HDATA(instance)->dma_bounce_buffer,
159 SCpnt->SCp.this_residual);
160
161 if (HDATA(instance)->dma_buffer_pool == BUF_SCSI_ALLOCED)
162 kfree (HDATA(instance)->dma_bounce_buffer);
163 else
164 amiga_chip_free(HDATA(instance)->dma_bounce_buffer);
165
166 HDATA(instance)->dma_bounce_buffer = NULL;
167 HDATA(instance)->dma_bounce_len = 0;
168 }
169 }
170
171 #define CHECK_WD33C93
172
173 int __init gvp11_detect(Scsi_Host_Template *tpnt)
174 {
175 static unsigned char called = 0;
176 struct Scsi_Host *instance;
177 unsigned long address;
178 unsigned int epc;
179 struct zorro_dev *z = NULL;
180 unsigned int default_dma_xfer_mask;
181 wd33c93_regs regs;
182 int num_gvp11 = 0;
183 #ifdef CHECK_WD33C93
184 volatile unsigned char *sasr_3393, *scmd_3393;
185 unsigned char save_sasr;
186 unsigned char q, qq;
187 #endif
188
189 if (!MACH_IS_AMIGA || called)
190 return 0;
191 called = 1;
192
193 tpnt->proc_name = "GVP11";
194 tpnt->proc_info = &wd33c93_proc_info;
195
196 while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
197 /*
198 * This should (hopefully) be the correct way to identify
199 * all the different GVP SCSI controllers (except for the
200 * SERIES I though).
201 */
202
203 if (z->id == ZORRO_PROD_GVP_COMBO_030_R3_SCSI ||
204 z->id == ZORRO_PROD_GVP_SERIES_II)
205 default_dma_xfer_mask = ~0x00ffffff;
206 else if (z->id == ZORRO_PROD_GVP_GFORCE_030_SCSI ||
207 z->id == ZORRO_PROD_GVP_A530_SCSI ||
208 z->id == ZORRO_PROD_GVP_COMBO_030_R4_SCSI)
209 default_dma_xfer_mask = ~0x01ffffff;
210 else if (z->id == ZORRO_PROD_GVP_A1291 ||
211 z->id == ZORRO_PROD_GVP_GFORCE_040_SCSI_1)
212 default_dma_xfer_mask = ~0x07ffffff;
213 else
214 continue;
215
216 /*
217 * Rumors state that some GVP ram boards use the same product
218 * code as the SCSI controllers. Therefore if the board-size
219 * is not 64KB we asume it is a ram board and bail out.
220 */
221 if (z->resource.end-z->resource.start != 0xffff)
222 continue;
223
224 address = z->resource.start;
225 if (!request_mem_region(address, 256, "wd33c93"))
226 continue;
227
228 #ifdef CHECK_WD33C93
229
230 /*
231 * These darn GVP boards are a problem - it can be tough to tell
232 * whether or not they include a SCSI controller. This is the
233 * ultimate Yet-Another-GVP-Detection-Hack in that it actually
234 * probes for a WD33c93 chip: If we find one, it's extremely
235 * likely that this card supports SCSI, regardless of Product_
236 * Code, Board_Size, etc.
237 */
238
239 /* Get pointers to the presumed register locations and save contents */
240
241 sasr_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SASR);
242 scmd_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SCMD);
243 save_sasr = *sasr_3393;
244
245 /* First test the AuxStatus Reg */
246
247 q = *sasr_3393; /* read it */
248 if (q & 0x08) /* bit 3 should always be clear */
249 goto release;
250 *sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */
251 if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */
252 *sasr_3393 = save_sasr; /* Oops - restore this byte */
253 goto release;
254 }
255 if (*sasr_3393 != q) { /* should still read the same */
256 *sasr_3393 = save_sasr; /* Oops - restore this byte */
257 goto release;
258 }
259 if (*scmd_3393 != q) /* and so should the image at 0x1f */
260 goto release;
261
262
263 /* Ok, we probably have a wd33c93, but let's check a few other places
264 * for good measure. Make sure that this works for both 'A and 'B
265 * chip versions.
266 */
267
268 *sasr_3393 = WD_SCSI_STATUS;
269 q = *scmd_3393;
270 *sasr_3393 = WD_SCSI_STATUS;
271 *scmd_3393 = ~q;
272 *sasr_3393 = WD_SCSI_STATUS;
273 qq = *scmd_3393;
274 *sasr_3393 = WD_SCSI_STATUS;
275 *scmd_3393 = q;
276 if (qq != q) /* should be read only */
277 goto release;
278 *sasr_3393 = 0x1e; /* this register is unimplemented */
279 q = *scmd_3393;
280 *sasr_3393 = 0x1e;
281 *scmd_3393 = ~q;
282 *sasr_3393 = 0x1e;
283 qq = *scmd_3393;
284 *sasr_3393 = 0x1e;
285 *scmd_3393 = q;
286 if (qq != q || qq != 0xff) /* should be read only, all 1's */
287 goto release;
288 *sasr_3393 = WD_TIMEOUT_PERIOD;
289 q = *scmd_3393;
290 *sasr_3393 = WD_TIMEOUT_PERIOD;
291 *scmd_3393 = ~q;
292 *sasr_3393 = WD_TIMEOUT_PERIOD;
293 qq = *scmd_3393;
294 *sasr_3393 = WD_TIMEOUT_PERIOD;
295 *scmd_3393 = q;
296 if (qq != (~q & 0xff)) /* should be read/write */
297 goto release;
298 #endif
299
300 instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata));
301 if(instance == NULL)
302 goto release;
303 instance->base = ZTWO_VADDR(address);
304 instance->irq = IRQ_AMIGA_PORTS;
305 instance->unique_id = z->slotaddr;
306
307 if (gvp11_xfer_mask)
308 HDATA(instance)->dma_xfer_mask = gvp11_xfer_mask;
309 else
310 HDATA(instance)->dma_xfer_mask = default_dma_xfer_mask;
311
312
313 DMA(instance)->secret2 = 1;
314 DMA(instance)->secret1 = 0;
315 DMA(instance)->secret3 = 15;
316 while (DMA(instance)->CNTR & GVP11_DMAC_BUSY) ;
317 DMA(instance)->CNTR = 0;
318
319 DMA(instance)->BANK = 0;
320
321 epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
322
323 /*
324 * Check for 14MHz SCSI clock
325 */
326 regs.SASR = &(DMA(instance)->SASR);
327 regs.SCMD = &(DMA(instance)->SCMD);
328 wd33c93_init(instance, regs, dma_setup, dma_stop,
329 (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10
330 : WD33C93_FS_12_15);
331
332 request_irq(IRQ_AMIGA_PORTS, gvp11_intr, SA_SHIRQ, "GVP11 SCSI",
333 instance);
334 DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
335 num_gvp11++;
336 continue;
337
338 release:
339 release_mem_region(address, 256);
340 }
341
342 return num_gvp11;
343 }
344
345 static int gvp11_bus_reset(Scsi_Cmnd *cmd)
346 {
347 /* FIXME perform bus-specific reset */
348 wd33c93_host_reset(cmd);
349 return SUCCESS;
350 }
351
352
353 #define HOSTS_C
354
355 #include "gvp11.h"
356
357 static Scsi_Host_Template driver_template = {
358 .proc_name = "GVP11",
359 .name = "GVP Series II SCSI",
360 .detect = gvp11_detect,
361 .release = gvp11_release,
362 .queuecommand = wd33c93_queuecommand,
363 .eh_abort_handler = wd33c93_abort,
364 .eh_bus_reset_handler = gvp11_bus_reset,
365 .eh_host_reset_handler = wd33c93_host_reset,
366 .can_queue = CAN_QUEUE,
367 .this_id = 7,
368 .sg_tablesize = SG_ALL,
369 .cmd_per_lun = CMD_PER_LUN,
370 .use_clustering = DISABLE_CLUSTERING
371 };
372
373
374 #include "scsi_module.c"
375
376 int gvp11_release(struct Scsi_Host *instance)
377 {
378 #ifdef MODULE
379 DMA(instance)->CNTR = 0;
380 release_mem_region(ZTWO_PADDR(instance->base), 256);
381 free_irq(IRQ_AMIGA_PORTS, instance);
382 wd33c93_release();
383 #endif
384 return 1;
385 }
386
387 MODULE_LICENSE("GPL");
388
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