blob: 37741e9b5c3b297380f4203376041333b4958ad2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/types.h>
2#include <linux/mm.h>
3#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/init.h>
5#include <linux/interrupt.h>
6
7#include <asm/setup.h>
8#include <asm/page.h>
9#include <asm/pgtable.h>
10#include <asm/amigaints.h>
11#include <asm/amigahw.h>
12#include <linux/zorro.h>
13#include <asm/irq.h>
14#include <linux/spinlock.h>
15
16#include "scsi.h"
17#include <scsi/scsi_host.h>
18#include "wd33c93.h"
19#include "gvp11.h"
20
21#include<linux/stat.h>
22
23#define DMA(ptr) ((gvp11_scsiregs *)((ptr)->base))
24#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
25
David Howells7d12e782006-10-05 14:55:46 +010026static irqreturn_t gvp11_intr (int irq, void *_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027{
28 unsigned long flags;
29 unsigned int status;
30 struct Scsi_Host *instance = (struct Scsi_Host *)_instance;
31
32 status = DMA(instance)->CNTR;
33 if (!(status & GVP11_DMAC_INT_PENDING))
34 return IRQ_NONE;
35
36 spin_lock_irqsave(instance->host_lock, flags);
37 wd33c93_intr(instance);
38 spin_unlock_irqrestore(instance->host_lock, flags);
39 return IRQ_HANDLED;
40}
41
42static int gvp11_xfer_mask = 0;
43
44void gvp11_setup (char *str, int *ints)
45{
46 gvp11_xfer_mask = ints[1];
47}
48
Henrik Kretzschmar65396412006-09-12 23:49:33 +020049static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
Linus Torvalds1da177e2005-04-16 15:20:36 -070050{
51 unsigned short cntr = GVP11_DMAC_INT_ENABLE;
52 unsigned long addr = virt_to_bus(cmd->SCp.ptr);
53 int bank_mask;
54 static int scsi_alloc_out_of_range = 0;
55
56 /* use bounce buffer if the physical address is bad */
57 if (addr & HDATA(cmd->device->host)->dma_xfer_mask ||
58 (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
59 {
60 HDATA(cmd->device->host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
61 & ~0x1ff;
62
63 if( !scsi_alloc_out_of_range ) {
64 HDATA(cmd->device->host)->dma_bounce_buffer =
65 kmalloc (HDATA(cmd->device->host)->dma_bounce_len, GFP_KERNEL);
66 HDATA(cmd->device->host)->dma_buffer_pool = BUF_SCSI_ALLOCED;
67 }
68
69 if (scsi_alloc_out_of_range ||
70 !HDATA(cmd->device->host)->dma_bounce_buffer) {
71 HDATA(cmd->device->host)->dma_bounce_buffer =
72 amiga_chip_alloc(HDATA(cmd->device->host)->dma_bounce_len,
73 "GVP II SCSI Bounce Buffer");
74
75 if(!HDATA(cmd->device->host)->dma_bounce_buffer)
76 {
77 HDATA(cmd->device->host)->dma_bounce_len = 0;
78 return 1;
79 }
80
81 HDATA(cmd->device->host)->dma_buffer_pool = BUF_CHIP_ALLOCED;
82 }
83
84 /* check if the address of the bounce buffer is OK */
85 addr = virt_to_bus(HDATA(cmd->device->host)->dma_bounce_buffer);
86
87 if (addr & HDATA(cmd->device->host)->dma_xfer_mask) {
88 /* fall back to Chip RAM if address out of range */
89 if( HDATA(cmd->device->host)->dma_buffer_pool == BUF_SCSI_ALLOCED) {
90 kfree (HDATA(cmd->device->host)->dma_bounce_buffer);
91 scsi_alloc_out_of_range = 1;
92 } else {
93 amiga_chip_free (HDATA(cmd->device->host)->dma_bounce_buffer);
94 }
95
96 HDATA(cmd->device->host)->dma_bounce_buffer =
97 amiga_chip_alloc(HDATA(cmd->device->host)->dma_bounce_len,
98 "GVP II SCSI Bounce Buffer");
99
100 if(!HDATA(cmd->device->host)->dma_bounce_buffer)
101 {
102 HDATA(cmd->device->host)->dma_bounce_len = 0;
103 return 1;
104 }
105
106 addr = virt_to_bus(HDATA(cmd->device->host)->dma_bounce_buffer);
107 HDATA(cmd->device->host)->dma_buffer_pool = BUF_CHIP_ALLOCED;
108 }
109
110 if (!dir_in) {
111 /* copy to bounce buffer for a write */
112 memcpy (HDATA(cmd->device->host)->dma_bounce_buffer,
113 cmd->SCp.ptr, cmd->SCp.this_residual);
114 }
115 }
116
117 /* setup dma direction */
118 if (!dir_in)
119 cntr |= GVP11_DMAC_DIR_WRITE;
120
121 HDATA(cmd->device->host)->dma_dir = dir_in;
122 DMA(cmd->device->host)->CNTR = cntr;
123
124 /* setup DMA *physical* address */
125 DMA(cmd->device->host)->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 if ((bank_mask = (~HDATA(cmd->device->host)->dma_xfer_mask >> 18) & 0x01c0))
135 DMA(cmd->device->host)->BANK = bank_mask & (addr >> 18);
136
137 /* start DMA */
138 DMA(cmd->device->host)->ST_DMA = 1;
139
140 /* return success */
141 return 0;
142}
143
Henrik Kretzschmar65396412006-09-12 23:49:33 +0200144static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
145 int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
147 /* stop DMA */
148 DMA(instance)->SP_DMA = 1;
149 /* remove write bit from CONTROL bits */
150 DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
151
152 /* copy from a bounce buffer, if necessary */
153 if (status && HDATA(instance)->dma_bounce_buffer) {
154 if (HDATA(instance)->dma_dir && SCpnt)
155 memcpy (SCpnt->SCp.ptr,
156 HDATA(instance)->dma_bounce_buffer,
157 SCpnt->SCp.this_residual);
158
159 if (HDATA(instance)->dma_buffer_pool == BUF_SCSI_ALLOCED)
160 kfree (HDATA(instance)->dma_bounce_buffer);
161 else
162 amiga_chip_free(HDATA(instance)->dma_bounce_buffer);
163
164 HDATA(instance)->dma_bounce_buffer = NULL;
165 HDATA(instance)->dma_bounce_len = 0;
166 }
167}
168
169#define CHECK_WD33C93
170
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100171int __init gvp11_detect(struct scsi_host_template *tpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
173 static unsigned char called = 0;
174 struct Scsi_Host *instance;
175 unsigned long address;
176 unsigned int epc;
177 struct zorro_dev *z = NULL;
178 unsigned int default_dma_xfer_mask;
179 wd33c93_regs regs;
180 int num_gvp11 = 0;
181#ifdef CHECK_WD33C93
182 volatile unsigned char *sasr_3393, *scmd_3393;
183 unsigned char save_sasr;
184 unsigned char q, qq;
185#endif
186
187 if (!MACH_IS_AMIGA || called)
188 return 0;
189 called = 1;
190
191 tpnt->proc_name = "GVP11";
192 tpnt->proc_info = &wd33c93_proc_info;
193
194 while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
195 /*
196 * This should (hopefully) be the correct way to identify
197 * all the different GVP SCSI controllers (except for the
198 * SERIES I though).
199 */
200
201 if (z->id == ZORRO_PROD_GVP_COMBO_030_R3_SCSI ||
202 z->id == ZORRO_PROD_GVP_SERIES_II)
203 default_dma_xfer_mask = ~0x00ffffff;
204 else if (z->id == ZORRO_PROD_GVP_GFORCE_030_SCSI ||
205 z->id == ZORRO_PROD_GVP_A530_SCSI ||
206 z->id == ZORRO_PROD_GVP_COMBO_030_R4_SCSI)
207 default_dma_xfer_mask = ~0x01ffffff;
208 else if (z->id == ZORRO_PROD_GVP_A1291 ||
209 z->id == ZORRO_PROD_GVP_GFORCE_040_SCSI_1)
210 default_dma_xfer_mask = ~0x07ffffff;
211 else
212 continue;
213
214 /*
215 * Rumors state that some GVP ram boards use the same product
216 * code as the SCSI controllers. Therefore if the board-size
217 * is not 64KB we asume it is a ram board and bail out.
218 */
219 if (z->resource.end-z->resource.start != 0xffff)
220 continue;
221
222 address = z->resource.start;
223 if (!request_mem_region(address, 256, "wd33c93"))
224 continue;
225
226#ifdef CHECK_WD33C93
227
228 /*
229 * These darn GVP boards are a problem - it can be tough to tell
230 * whether or not they include a SCSI controller. This is the
231 * ultimate Yet-Another-GVP-Detection-Hack in that it actually
232 * probes for a WD33c93 chip: If we find one, it's extremely
233 * likely that this card supports SCSI, regardless of Product_
234 * Code, Board_Size, etc.
235 */
236
237 /* Get pointers to the presumed register locations and save contents */
238
239 sasr_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SASR);
240 scmd_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SCMD);
241 save_sasr = *sasr_3393;
242
243 /* First test the AuxStatus Reg */
244
245 q = *sasr_3393; /* read it */
246 if (q & 0x08) /* bit 3 should always be clear */
247 goto release;
248 *sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */
249 if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */
250 *sasr_3393 = save_sasr; /* Oops - restore this byte */
251 goto release;
252 }
253 if (*sasr_3393 != q) { /* should still read the same */
254 *sasr_3393 = save_sasr; /* Oops - restore this byte */
255 goto release;
256 }
257 if (*scmd_3393 != q) /* and so should the image at 0x1f */
258 goto release;
259
260
261 /* Ok, we probably have a wd33c93, but let's check a few other places
262 * for good measure. Make sure that this works for both 'A and 'B
263 * chip versions.
264 */
265
266 *sasr_3393 = WD_SCSI_STATUS;
267 q = *scmd_3393;
268 *sasr_3393 = WD_SCSI_STATUS;
269 *scmd_3393 = ~q;
270 *sasr_3393 = WD_SCSI_STATUS;
271 qq = *scmd_3393;
272 *sasr_3393 = WD_SCSI_STATUS;
273 *scmd_3393 = q;
274 if (qq != q) /* should be read only */
275 goto release;
276 *sasr_3393 = 0x1e; /* this register is unimplemented */
277 q = *scmd_3393;
278 *sasr_3393 = 0x1e;
279 *scmd_3393 = ~q;
280 *sasr_3393 = 0x1e;
281 qq = *scmd_3393;
282 *sasr_3393 = 0x1e;
283 *scmd_3393 = q;
284 if (qq != q || qq != 0xff) /* should be read only, all 1's */
285 goto release;
286 *sasr_3393 = WD_TIMEOUT_PERIOD;
287 q = *scmd_3393;
288 *sasr_3393 = WD_TIMEOUT_PERIOD;
289 *scmd_3393 = ~q;
290 *sasr_3393 = WD_TIMEOUT_PERIOD;
291 qq = *scmd_3393;
292 *sasr_3393 = WD_TIMEOUT_PERIOD;
293 *scmd_3393 = q;
294 if (qq != (~q & 0xff)) /* should be read/write */
295 goto release;
296#endif
297
298 instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata));
299 if(instance == NULL)
300 goto release;
301 instance->base = ZTWO_VADDR(address);
302 instance->irq = IRQ_AMIGA_PORTS;
303 instance->unique_id = z->slotaddr;
304
305 if (gvp11_xfer_mask)
306 HDATA(instance)->dma_xfer_mask = gvp11_xfer_mask;
307 else
308 HDATA(instance)->dma_xfer_mask = default_dma_xfer_mask;
309
310
311 DMA(instance)->secret2 = 1;
312 DMA(instance)->secret1 = 0;
313 DMA(instance)->secret3 = 15;
314 while (DMA(instance)->CNTR & GVP11_DMAC_BUSY) ;
315 DMA(instance)->CNTR = 0;
316
317 DMA(instance)->BANK = 0;
318
319 epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
320
321 /*
322 * Check for 14MHz SCSI clock
323 */
324 regs.SASR = &(DMA(instance)->SASR);
325 regs.SCMD = &(DMA(instance)->SCMD);
326 wd33c93_init(instance, regs, dma_setup, dma_stop,
327 (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10
328 : WD33C93_FS_12_15);
329
Thomas Gleixner1d6f3592006-07-01 19:29:42 -0700330 request_irq(IRQ_AMIGA_PORTS, gvp11_intr, IRQF_SHARED, "GVP11 SCSI",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 instance);
332 DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
333 num_gvp11++;
334 continue;
335
336release:
337 release_mem_region(address, 256);
338 }
339
340 return num_gvp11;
341}
342
Henrik Kretzschmar65396412006-09-12 23:49:33 +0200343static int gvp11_bus_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
345 /* FIXME perform bus-specific reset */
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400346
Jeff Garzik df0ae242005-05-28 07:57:14 -0400347 /* FIXME 2: shouldn't we no-op this function (return
348 FAILED), and fall back to host reset function,
349 wd33c93_host_reset ? */
350
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400351 spin_lock_irq(cmd->device->host->host_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 wd33c93_host_reset(cmd);
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400353 spin_unlock_irq(cmd->device->host->host_lock);
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 return SUCCESS;
356}
357
358
359#define HOSTS_C
360
361#include "gvp11.h"
362
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100363static struct scsi_host_template driver_template = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 .proc_name = "GVP11",
365 .name = "GVP Series II SCSI",
366 .detect = gvp11_detect,
367 .release = gvp11_release,
368 .queuecommand = wd33c93_queuecommand,
369 .eh_abort_handler = wd33c93_abort,
370 .eh_bus_reset_handler = gvp11_bus_reset,
371 .eh_host_reset_handler = wd33c93_host_reset,
372 .can_queue = CAN_QUEUE,
373 .this_id = 7,
374 .sg_tablesize = SG_ALL,
375 .cmd_per_lun = CMD_PER_LUN,
376 .use_clustering = DISABLE_CLUSTERING
377};
378
379
380#include "scsi_module.c"
381
382int gvp11_release(struct Scsi_Host *instance)
383{
384#ifdef MODULE
385 DMA(instance)->CNTR = 0;
386 release_mem_region(ZTWO_PADDR(instance->base), 256);
387 free_irq(IRQ_AMIGA_PORTS, instance);
388 wd33c93_release();
389#endif
390 return 1;
391}
392
393MODULE_LICENSE("GPL");