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1#include <linux/types.h>
2#include <linux/init.h>
3#include <linux/interrupt.h>
4#include <linux/mm.h>
5#include <linux/slab.h>
6#include <linux/spinlock.h>
7#include <linux/zorro.h>
8#include <linux/module.h>
9
10#include <asm/page.h>
11#include <asm/pgtable.h>
12#include <asm/amigaints.h>
13#include <asm/amigahw.h>
14
15#include "scsi.h"
16#include "wd33c93.h"
17#include "gvp11.h"
18
19
20#define CHECK_WD33C93
21
22struct gvp11_hostdata {
23 struct WD33C93_hostdata wh;
24 struct gvp11_scsiregs *regs;
25};
26
27static irqreturn_t gvp11_intr(int irq, void *data)
28{
29 struct Scsi_Host *instance = data;
30 struct gvp11_hostdata *hdata = shost_priv(instance);
31 unsigned int status = hdata->regs->CNTR;
32 unsigned long flags;
33
34 if (!(status & GVP11_DMAC_INT_PENDING))
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
43static int gvp11_xfer_mask = 0;
44
45void gvp11_setup(char *str, int *ints)
46{
47 gvp11_xfer_mask = ints[1];
48}
49
50static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
51{
52 struct Scsi_Host *instance = cmd->device->host;
53 struct gvp11_hostdata *hdata = shost_priv(instance);
54 struct WD33C93_hostdata *wh = &hdata->wh;
55 struct gvp11_scsiregs *regs = hdata->regs;
56 unsigned short cntr = GVP11_DMAC_INT_ENABLE;
57 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
58 int bank_mask;
59 static int scsi_alloc_out_of_range = 0;
60
61 /* use bounce buffer if the physical address is bad */
62 if (addr & wh->dma_xfer_mask) {
63 wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
64
65 if (!scsi_alloc_out_of_range) {
66 wh->dma_bounce_buffer =
67 kmalloc(wh->dma_bounce_len, GFP_KERNEL);
68 wh->dma_buffer_pool = BUF_SCSI_ALLOCED;
69 }
70
71 if (scsi_alloc_out_of_range ||
72 !wh->dma_bounce_buffer) {
73 wh->dma_bounce_buffer =
74 amiga_chip_alloc(wh->dma_bounce_len,
75 "GVP II SCSI Bounce Buffer");
76
77 if (!wh->dma_bounce_buffer) {
78 wh->dma_bounce_len = 0;
79 return 1;
80 }
81
82 wh->dma_buffer_pool = BUF_CHIP_ALLOCED;
83 }
84
85 /* check if the address of the bounce buffer is OK */
86 addr = virt_to_bus(wh->dma_bounce_buffer);
87
88 if (addr & wh->dma_xfer_mask) {
89 /* fall back to Chip RAM if address out of range */
90 if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) {
91 kfree(wh->dma_bounce_buffer);
92 scsi_alloc_out_of_range = 1;
93 } else {
94 amiga_chip_free(wh->dma_bounce_buffer);
95 }
96
97 wh->dma_bounce_buffer =
98 amiga_chip_alloc(wh->dma_bounce_len,
99 "GVP II SCSI Bounce Buffer");
100
101 if (!wh->dma_bounce_buffer) {
102 wh->dma_bounce_len = 0;
103 return 1;
104 }
105
106 addr = virt_to_bus(wh->dma_bounce_buffer);
107 wh->dma_buffer_pool = BUF_CHIP_ALLOCED;
108 }
109
110 if (!dir_in) {
111 /* copy to bounce buffer for a write */
112 memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,
113 cmd->SCp.this_residual);
114 }
115 }
116
117 /* setup dma direction */
118 if (!dir_in)
119 cntr |= GVP11_DMAC_DIR_WRITE;
120
121 wh->dma_dir = dir_in;
122 regs->CNTR = cntr;
123
124 /* setup DMA *physical* address */
125 regs->ACR = addr;
126
127 if (dir_in) {
128 /* invalidate any cache */
129 cache_clear(addr, cmd->SCp.this_residual);
130 } else {
131 /* push any dirty cache */
132 cache_push(addr, cmd->SCp.this_residual);
133 }
134
135 bank_mask = (~wh->dma_xfer_mask >> 18) & 0x01c0;
136 if (bank_mask)
137 regs->BANK = bank_mask & (addr >> 18);
138
139 /* start DMA */
140 regs->ST_DMA = 1;
141
142 /* return success */
143 return 0;
144}
145
146static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
147 int status)
148{
149 struct gvp11_hostdata *hdata = shost_priv(instance);
150 struct WD33C93_hostdata *wh = &hdata->wh;
151 struct gvp11_scsiregs *regs = hdata->regs;
152
153 /* stop DMA */
154 regs->SP_DMA = 1;
155 /* remove write bit from CONTROL bits */
156 regs->CNTR = GVP11_DMAC_INT_ENABLE;
157
158 /* copy from a bounce buffer, if necessary */
159 if (status && wh->dma_bounce_buffer) {
160 if (wh->dma_dir && SCpnt)
161 memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,
162 SCpnt->SCp.this_residual);
163
164 if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED)
165 kfree(wh->dma_bounce_buffer);
166 else
167 amiga_chip_free(wh->dma_bounce_buffer);
168
169 wh->dma_bounce_buffer = NULL;
170 wh->dma_bounce_len = 0;
171 }
172}
173
174static struct scsi_host_template gvp11_scsi_template = {
175 .module = THIS_MODULE,
176 .name = "GVP Series II SCSI",
177 .show_info = wd33c93_show_info,
178 .write_info = wd33c93_write_info,
179 .proc_name = "GVP11",
180 .queuecommand = wd33c93_queuecommand,
181 .eh_abort_handler = wd33c93_abort,
182 .eh_host_reset_handler = wd33c93_host_reset,
183 .can_queue = CAN_QUEUE,
184 .this_id = 7,
185 .sg_tablesize = SG_ALL,
186 .cmd_per_lun = CMD_PER_LUN,
187 .dma_boundary = PAGE_SIZE - 1,
188};
189
190static int check_wd33c93(struct gvp11_scsiregs *regs)
191{
192#ifdef CHECK_WD33C93
193 volatile unsigned char *sasr_3393, *scmd_3393;
194 unsigned char save_sasr;
195 unsigned char q, qq;
196
197 /*
198 * These darn GVP boards are a problem - it can be tough to tell
199 * whether or not they include a SCSI controller. This is the
200 * ultimate Yet-Another-GVP-Detection-Hack in that it actually
201 * probes for a WD33c93 chip: If we find one, it's extremely
202 * likely that this card supports SCSI, regardless of Product_
203 * Code, Board_Size, etc.
204 */
205
206 /* Get pointers to the presumed register locations and save contents */
207
208 sasr_3393 = &regs->SASR;
209 scmd_3393 = &regs->SCMD;
210 save_sasr = *sasr_3393;
211
212 /* First test the AuxStatus Reg */
213
214 q = *sasr_3393; /* read it */
215 if (q & 0x08) /* bit 3 should always be clear */
216 return -ENODEV;
217 *sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */
218 if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */
219 *sasr_3393 = save_sasr; /* Oops - restore this byte */
220 return -ENODEV;
221 }
222 if (*sasr_3393 != q) { /* should still read the same */
223 *sasr_3393 = save_sasr; /* Oops - restore this byte */
224 return -ENODEV;
225 }
226 if (*scmd_3393 != q) /* and so should the image at 0x1f */
227 return -ENODEV;
228
229 /*
230 * Ok, we probably have a wd33c93, but let's check a few other places
231 * for good measure. Make sure that this works for both 'A and 'B
232 * chip versions.
233 */
234
235 *sasr_3393 = WD_SCSI_STATUS;
236 q = *scmd_3393;
237 *sasr_3393 = WD_SCSI_STATUS;
238 *scmd_3393 = ~q;
239 *sasr_3393 = WD_SCSI_STATUS;
240 qq = *scmd_3393;
241 *sasr_3393 = WD_SCSI_STATUS;
242 *scmd_3393 = q;
243 if (qq != q) /* should be read only */
244 return -ENODEV;
245 *sasr_3393 = 0x1e; /* this register is unimplemented */
246 q = *scmd_3393;
247 *sasr_3393 = 0x1e;
248 *scmd_3393 = ~q;
249 *sasr_3393 = 0x1e;
250 qq = *scmd_3393;
251 *sasr_3393 = 0x1e;
252 *scmd_3393 = q;
253 if (qq != q || qq != 0xff) /* should be read only, all 1's */
254 return -ENODEV;
255 *sasr_3393 = WD_TIMEOUT_PERIOD;
256 q = *scmd_3393;
257 *sasr_3393 = WD_TIMEOUT_PERIOD;
258 *scmd_3393 = ~q;
259 *sasr_3393 = WD_TIMEOUT_PERIOD;
260 qq = *scmd_3393;
261 *sasr_3393 = WD_TIMEOUT_PERIOD;
262 *scmd_3393 = q;
263 if (qq != (~q & 0xff)) /* should be read/write */
264 return -ENODEV;
265#endif /* CHECK_WD33C93 */
266
267 return 0;
268}
269
270static int gvp11_probe(struct zorro_dev *z, const struct zorro_device_id *ent)
271{
272 struct Scsi_Host *instance;
273 unsigned long address;
274 int error;
275 unsigned int epc;
276 unsigned int default_dma_xfer_mask;
277 struct gvp11_hostdata *hdata;
278 struct gvp11_scsiregs *regs;
279 wd33c93_regs wdregs;
280
281 default_dma_xfer_mask = ent->driver_data;
282
283 /*
284 * Rumors state that some GVP ram boards use the same product
285 * code as the SCSI controllers. Therefore if the board-size
286 * is not 64KB we assume it is a ram board and bail out.
287 */
288 if (zorro_resource_len(z) != 0x10000)
289 return -ENODEV;
290
291 address = z->resource.start;
292 if (!request_mem_region(address, 256, "wd33c93"))
293 return -EBUSY;
294
295 regs = ZTWO_VADDR(address);
296
297 error = check_wd33c93(regs);
298 if (error)
299 goto fail_check_or_alloc;
300
301 instance = scsi_host_alloc(&gvp11_scsi_template,
302 sizeof(struct gvp11_hostdata));
303 if (!instance) {
304 error = -ENOMEM;
305 goto fail_check_or_alloc;
306 }
307
308 instance->irq = IRQ_AMIGA_PORTS;
309 instance->unique_id = z->slotaddr;
310
311 regs->secret2 = 1;
312 regs->secret1 = 0;
313 regs->secret3 = 15;
314 while (regs->CNTR & GVP11_DMAC_BUSY)
315 ;
316 regs->CNTR = 0;
317 regs->BANK = 0;
318
319 wdregs.SASR = &regs->SASR;
320 wdregs.SCMD = &regs->SCMD;
321
322 hdata = shost_priv(instance);
323 if (gvp11_xfer_mask)
324 hdata->wh.dma_xfer_mask = gvp11_xfer_mask;
325 else
326 hdata->wh.dma_xfer_mask = default_dma_xfer_mask;
327
328 hdata->wh.no_sync = 0xff;
329 hdata->wh.fast = 0;
330 hdata->wh.dma_mode = CTRL_DMA;
331 hdata->regs = regs;
332
333 /*
334 * Check for 14MHz SCSI clock
335 */
336 epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
337 wd33c93_init(instance, wdregs, dma_setup, dma_stop,
338 (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10
339 : WD33C93_FS_12_15);
340
341 error = request_irq(IRQ_AMIGA_PORTS, gvp11_intr, IRQF_SHARED,
342 "GVP11 SCSI", instance);
343 if (error)
344 goto fail_irq;
345
346 regs->CNTR = GVP11_DMAC_INT_ENABLE;
347
348 error = scsi_add_host(instance, NULL);
349 if (error)
350 goto fail_host;
351
352 zorro_set_drvdata(z, instance);
353 scsi_scan_host(instance);
354 return 0;
355
356fail_host:
357 free_irq(IRQ_AMIGA_PORTS, instance);
358fail_irq:
359 scsi_host_put(instance);
360fail_check_or_alloc:
361 release_mem_region(address, 256);
362 return error;
363}
364
365static void gvp11_remove(struct zorro_dev *z)
366{
367 struct Scsi_Host *instance = zorro_get_drvdata(z);
368 struct gvp11_hostdata *hdata = shost_priv(instance);
369
370 hdata->regs->CNTR = 0;
371 scsi_remove_host(instance);
372 free_irq(IRQ_AMIGA_PORTS, instance);
373 scsi_host_put(instance);
374 release_mem_region(z->resource.start, 256);
375}
376
377 /*
378 * This should (hopefully) be the correct way to identify
379 * all the different GVP SCSI controllers (except for the
380 * SERIES I though).
381 */
382
383static struct zorro_device_id gvp11_zorro_tbl[] = {
384 { ZORRO_PROD_GVP_COMBO_030_R3_SCSI, ~0x00ffffff },
385 { ZORRO_PROD_GVP_SERIES_II, ~0x00ffffff },
386 { ZORRO_PROD_GVP_GFORCE_030_SCSI, ~0x01ffffff },
387 { ZORRO_PROD_GVP_A530_SCSI, ~0x01ffffff },
388 { ZORRO_PROD_GVP_COMBO_030_R4_SCSI, ~0x01ffffff },
389 { ZORRO_PROD_GVP_A1291, ~0x07ffffff },
390 { ZORRO_PROD_GVP_GFORCE_040_SCSI_1, ~0x07ffffff },
391 { 0 }
392};
393MODULE_DEVICE_TABLE(zorro, gvp11_zorro_tbl);
394
395static struct zorro_driver gvp11_driver = {
396 .name = "gvp11",
397 .id_table = gvp11_zorro_tbl,
398 .probe = gvp11_probe,
399 .remove = gvp11_remove,
400};
401
402static int __init gvp11_init(void)
403{
404 return zorro_register_driver(&gvp11_driver);
405}
406module_init(gvp11_init);
407
408static void __exit gvp11_exit(void)
409{
410 zorro_unregister_driver(&gvp11_driver);
411}
412module_exit(gvp11_exit);
413
414MODULE_DESCRIPTION("GVP Series II SCSI");
415MODULE_LICENSE("GPL");
416

Warning: That file was not part of the compilation database. It may have many parsing errors.