Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #define PSEUDO_DMA |
2 | #define DONT_USE_INTR | |
1da177e4 LT |
3 | |
4 | /* | |
5 | * DTC 3180/3280 driver, by | |
6 | * Ray Van Tassle rayvt@comm.mot.com | |
7 | * | |
8 | * taken from ... | |
9 | * Trantor T128/T128F/T228 driver by... | |
10 | * | |
11 | * Drew Eckhardt | |
12 | * Visionary Computing | |
13 | * (Unix and Linux consulting and custom programming) | |
14 | * drew@colorado.edu | |
15 | * +1 (303) 440-4894 | |
3f9e986e | 16 | */ |
1da177e4 LT |
17 | |
18 | /* | |
1da177e4 LT |
19 | * The card is detected and initialized in one of several ways : |
20 | * 1. Autoprobe (default) - since the board is memory mapped, | |
21 | * a BIOS signature is scanned for to locate the registers. | |
22 | * An interrupt is triggered to autoprobe for the interrupt | |
23 | * line. | |
24 | * | |
25 | * 2. With command line overrides - dtc=address,irq may be | |
26 | * used on the LILO command line to override the defaults. | |
27 | * | |
28 | */ | |
29 | ||
30 | /*----------------------------------------------------------------*/ | |
31 | /* the following will set the monitor border color (useful to find | |
32 | where something crashed or gets stuck at */ | |
33 | /* 1 = blue | |
34 | 2 = green | |
35 | 3 = cyan | |
36 | 4 = red | |
37 | 5 = magenta | |
38 | 6 = yellow | |
39 | 7 = white | |
40 | */ | |
41 | #if 0 | |
42 | #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);} | |
43 | #else | |
44 | #define rtrc(i) {} | |
45 | #endif | |
46 | ||
47 | ||
1da177e4 | 48 | #include <linux/module.h> |
1da177e4 | 49 | #include <linux/blkdev.h> |
1da177e4 LT |
50 | #include <linux/string.h> |
51 | #include <linux/init.h> | |
52 | #include <linux/interrupt.h> | |
53d5ed62 | 53 | #include <linux/io.h> |
1da177e4 | 54 | #include <scsi/scsi_host.h> |
161c0059 | 55 | |
1da177e4 LT |
56 | #include "dtc.h" |
57 | #define AUTOPROBE_IRQ | |
58 | #include "NCR5380.h" | |
59 | ||
1da177e4 LT |
60 | /* |
61 | * The DTC3180 & 3280 boards are memory mapped. | |
62 | * | |
63 | */ | |
64 | ||
65 | /* | |
66 | */ | |
67 | /* Offset from DTC_5380_OFFSET */ | |
68 | #define DTC_CONTROL_REG 0x100 /* rw */ | |
69 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
70 | #define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */ | |
71 | ||
72 | #define CSR_RESET 0x80 /* wo Resets 53c400 */ | |
73 | #define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */ | |
74 | #define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */ | |
75 | #define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */ | |
76 | #define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */ | |
77 | #define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */ | |
78 | #define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */ | |
79 | #define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */ | |
80 | #define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */ | |
81 | #define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR) | |
82 | ||
83 | ||
84 | #define DTC_BLK_CNT 0x101 /* rw | |
85 | * # of 128-byte blocks to transfer */ | |
86 | ||
87 | ||
88 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
89 | ||
90 | #define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */ | |
91 | #define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer | |
92 | * after disconnect/reconnect*/ | |
93 | ||
94 | #define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */ | |
95 | ||
96 | /*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */ | |
97 | #define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */ | |
98 | ||
99 | static struct override { | |
100 | unsigned int address; | |
101 | int irq; | |
102 | } overrides | |
103 | #ifdef OVERRIDE | |
104 | [] __initdata = OVERRIDE; | |
105 | #else | |
1fbe8529 AC |
106 | [4] __initdata = { |
107 | { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO } | |
108 | }; | |
1da177e4 LT |
109 | #endif |
110 | ||
6391a113 | 111 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
1da177e4 LT |
112 | |
113 | static struct base { | |
114 | unsigned long address; | |
115 | int noauto; | |
6391a113 TK |
116 | } bases[] __initdata = { |
117 | { 0xcc000, 0 }, | |
118 | { 0xc8000, 0 }, | |
119 | { 0xdc000, 0 }, | |
1da177e4 LT |
120 | { 0xd8000, 0 } |
121 | }; | |
122 | ||
6391a113 | 123 | #define NO_BASES ARRAY_SIZE(bases) |
1da177e4 LT |
124 | |
125 | static const struct signature { | |
126 | const char *string; | |
127 | int offset; | |
6391a113 | 128 | } signatures[] = { |
1da177e4 LT |
129 | {"DATA TECHNOLOGY CORPORATION BIOS", 0x25}, |
130 | }; | |
131 | ||
6391a113 | 132 | #define NO_SIGNATURES ARRAY_SIZE(signatures) |
1da177e4 LT |
133 | |
134 | #ifndef MODULE | |
135 | /* | |
136 | * Function : dtc_setup(char *str, int *ints) | |
137 | * | |
138 | * Purpose : LILO command line initialization of the overrides array, | |
6391a113 | 139 | * |
1da177e4 LT |
140 | * Inputs : str - unused, ints - array of integer parameters with ints[0] |
141 | * equal to the number of ints. | |
142 | * | |
1fbe8529 | 143 | */ |
1da177e4 | 144 | |
925e4610 | 145 | static int __init dtc_setup(char *str) |
1da177e4 | 146 | { |
d5f7e65d | 147 | static int commandline_current; |
1da177e4 | 148 | int i; |
925e4610 FT |
149 | int ints[10]; |
150 | ||
151 | get_options(str, ARRAY_SIZE(ints), ints); | |
1da177e4 LT |
152 | if (ints[0] != 2) |
153 | printk("dtc_setup: usage dtc=address,irq\n"); | |
154 | else if (commandline_current < NO_OVERRIDES) { | |
155 | overrides[commandline_current].address = ints[1]; | |
156 | overrides[commandline_current].irq = ints[2]; | |
157 | for (i = 0; i < NO_BASES; ++i) | |
158 | if (bases[i].address == ints[1]) { | |
159 | bases[i].noauto = 1; | |
160 | break; | |
161 | } | |
162 | ++commandline_current; | |
163 | } | |
925e4610 | 164 | return 1; |
1da177e4 | 165 | } |
925e4610 FT |
166 | |
167 | __setup("dtc=", dtc_setup); | |
1da177e4 LT |
168 | #endif |
169 | ||
170 | /* | |
d0be4a7d | 171 | * Function : int dtc_detect(struct scsi_host_template * tpnt) |
1da177e4 LT |
172 | * |
173 | * Purpose : detects and initializes DTC 3180/3280 controllers | |
174 | * that were autoprobed, overridden on the LILO command line, | |
175 | * or specified at compile time. | |
176 | * | |
177 | * Inputs : tpnt - template for this SCSI adapter. | |
178 | * | |
179 | * Returns : 1 if a host adapter was found, 0 if not. | |
180 | * | |
181 | */ | |
182 | ||
d0be4a7d | 183 | static int __init dtc_detect(struct scsi_host_template * tpnt) |
1da177e4 | 184 | { |
d5f7e65d | 185 | static int current_override, current_base; |
1da177e4 LT |
186 | struct Scsi_Host *instance; |
187 | unsigned int addr; | |
188 | void __iomem *base; | |
189 | int sig, count; | |
190 | ||
1da177e4 LT |
191 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { |
192 | addr = 0; | |
193 | base = NULL; | |
194 | ||
195 | if (overrides[current_override].address) { | |
196 | addr = overrides[current_override].address; | |
197 | base = ioremap(addr, 0x2000); | |
198 | if (!base) | |
199 | addr = 0; | |
200 | } else | |
201 | for (; !addr && (current_base < NO_BASES); ++current_base) { | |
2f7dba9f FT |
202 | dprintk(NDEBUG_INIT, "dtc: probing address 0x%08x\n", |
203 | (unsigned int)bases[current_base].address); | |
1da177e4 LT |
204 | if (bases[current_base].noauto) |
205 | continue; | |
206 | base = ioremap(bases[current_base].address, 0x2000); | |
207 | if (!base) | |
208 | continue; | |
209 | for (sig = 0; sig < NO_SIGNATURES; ++sig) { | |
210 | if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { | |
211 | addr = bases[current_base].address; | |
2f7dba9f | 212 | dprintk(NDEBUG_INIT, "dtc: detected board\n"); |
1da177e4 LT |
213 | goto found; |
214 | } | |
215 | } | |
216 | iounmap(base); | |
217 | } | |
218 | ||
2f7dba9f | 219 | dprintk(NDEBUG_INIT, "dtc: addr = 0x%08x\n", addr); |
1da177e4 LT |
220 | |
221 | if (!addr) | |
222 | break; | |
223 | ||
224 | found: | |
225 | instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); | |
226 | if (instance == NULL) | |
0ad0eff9 | 227 | goto out_unmap; |
1da177e4 LT |
228 | |
229 | instance->base = addr; | |
230 | ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base; | |
231 | ||
55181be8 | 232 | if (NCR5380_init(instance, FLAG_NO_DMA_FIXUP)) |
0ad0eff9 | 233 | goto out_unregister; |
1da177e4 | 234 | |
b6488f97 FT |
235 | NCR5380_maybe_reset_bus(instance); |
236 | ||
1da177e4 LT |
237 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */ |
238 | if (overrides[current_override].irq != IRQ_AUTO) | |
239 | instance->irq = overrides[current_override].irq; | |
240 | else | |
241 | instance->irq = NCR5380_probe_irq(instance, DTC_IRQS); | |
242 | ||
22f5f10d FT |
243 | /* Compatibility with documented NCR5380 kernel parameters */ |
244 | if (instance->irq == 255) | |
245 | instance->irq = NO_IRQ; | |
246 | ||
1da177e4 LT |
247 | #ifndef DONT_USE_INTR |
248 | /* With interrupts enabled, it will sometimes hang when doing heavy | |
249 | * reads. So better not enable them until I finger it out. */ | |
22f5f10d | 250 | if (instance->irq != NO_IRQ) |
4909cc2b | 251 | if (request_irq(instance->irq, dtc_intr, 0, |
1e641664 | 252 | "dtc", instance)) { |
1da177e4 | 253 | printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); |
22f5f10d | 254 | instance->irq = NO_IRQ; |
1da177e4 LT |
255 | } |
256 | ||
22f5f10d | 257 | if (instance->irq == NO_IRQ) { |
1da177e4 LT |
258 | printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); |
259 | printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
260 | } | |
261 | #else | |
22f5f10d | 262 | if (instance->irq != NO_IRQ) |
1da177e4 | 263 | printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no); |
22f5f10d | 264 | instance->irq = NO_IRQ; |
1da177e4 | 265 | #endif |
2f7dba9f FT |
266 | dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n", |
267 | instance->host_no, instance->irq); | |
1da177e4 | 268 | |
1da177e4 LT |
269 | ++current_override; |
270 | ++count; | |
271 | } | |
272 | return count; | |
0ad0eff9 FT |
273 | |
274 | out_unregister: | |
275 | scsi_unregister(instance); | |
276 | out_unmap: | |
277 | iounmap(base); | |
278 | return count; | |
1da177e4 LT |
279 | } |
280 | ||
281 | /* | |
282 | * Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
283 | * | |
284 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
285 | * the specified device / size. | |
286 | * | |
287 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
288 | * major / minor, ip[] = {heads, sectors, cylinders} | |
289 | * | |
290 | * Returns : always 0 (success), initializes ip | |
291 | * | |
292 | */ | |
293 | ||
294 | /* | |
295 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
296 | * using hard disks on a trantor should verify that this mapping corresponds | |
297 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
298 | * and matching the H_C_S coordinates to what DOS uses. | |
299 | */ | |
300 | ||
301 | static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev, | |
302 | sector_t capacity, int *ip) | |
303 | { | |
304 | int size = capacity; | |
305 | ||
306 | ip[0] = 64; | |
307 | ip[1] = 32; | |
308 | ip[2] = size >> 11; | |
309 | return 0; | |
310 | } | |
311 | ||
312 | ||
313 | /**************************************************************** | |
314 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
315 | * unsigned char *dst, int len) | |
316 | * | |
317 | * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to | |
318 | * dst | |
319 | * | |
320 | * Inputs : dst = destination, len = length in bytes | |
321 | * | |
322 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
323 | * timeout. | |
324 | */ | |
325 | ||
1da177e4 LT |
326 | static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) |
327 | { | |
328 | unsigned char *d = dst; | |
329 | int i; /* For counting time spent in the poll-loop */ | |
a9c2dc43 | 330 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 LT |
331 | |
332 | i = 0; | |
22f5f10d | 333 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
334 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ); |
335 | else | |
336 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE); | |
337 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
338 | rtrc(1); | |
339 | while (len > 0) { | |
340 | rtrc(2); | |
341 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
342 | ++i; | |
343 | rtrc(3); | |
54d8fe44 | 344 | memcpy_fromio(d, hostdata->base + DTC_DATA_BUF, 128); |
1da177e4 LT |
345 | d += 128; |
346 | len -= 128; | |
347 | rtrc(7); | |
348 | /*** with int's on, it sometimes hangs after here. | |
349 | * Looks like something makes HBNR go away. */ | |
350 | } | |
351 | rtrc(4); | |
352 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
353 | ++i; | |
1da177e4 | 354 | rtrc(0); |
a9c2dc43 FT |
355 | if (i > hostdata->spin_max_r) |
356 | hostdata->spin_max_r = i; | |
1da177e4 LT |
357 | return (0); |
358 | } | |
359 | ||
360 | /**************************************************************** | |
361 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
362 | * unsigned char *src, int len) | |
363 | * | |
364 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
365 | * src | |
366 | * | |
367 | * Inputs : src = source, len = length in bytes | |
368 | * | |
369 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
370 | * timeout. | |
371 | */ | |
372 | ||
373 | static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) | |
374 | { | |
375 | int i; | |
a9c2dc43 | 376 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 | 377 | |
22f5f10d | 378 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
379 | NCR5380_write(DTC_CONTROL_REG, 0); |
380 | else | |
381 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); | |
382 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
383 | for (i = 0; len > 0; ++i) { | |
384 | rtrc(5); | |
385 | /* Poll until the host buffer can accept data. */ | |
386 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
387 | ++i; | |
388 | rtrc(3); | |
54d8fe44 | 389 | memcpy_toio(hostdata->base + DTC_DATA_BUF, src, 128); |
1da177e4 LT |
390 | src += 128; |
391 | len -= 128; | |
392 | } | |
393 | rtrc(4); | |
394 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
395 | ++i; | |
396 | rtrc(6); | |
397 | /* Wait until the last byte has been sent to the disk */ | |
398 | while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) | |
399 | ++i; | |
400 | rtrc(7); | |
401 | /* Check for parity error here. fixme. */ | |
1da177e4 | 402 | rtrc(0); |
a9c2dc43 FT |
403 | if (i > hostdata->spin_max_w) |
404 | hostdata->spin_max_w = i; | |
1da177e4 LT |
405 | return (0); |
406 | } | |
407 | ||
ff3d4578 FT |
408 | static int dtc_dma_xfer_len(struct scsi_cmnd *cmd) |
409 | { | |
410 | int transfersize = cmd->transfersize; | |
411 | ||
412 | /* Limit transfers to 32K, for xx400 & xx406 | |
413 | * pseudoDMA that transfers in 128 bytes blocks. | |
414 | */ | |
415 | if (transfersize > 32 * 1024 && cmd->SCp.this_residual && | |
416 | !(cmd->SCp.this_residual % transfersize)) | |
417 | transfersize = 32 * 1024; | |
418 | ||
419 | return transfersize; | |
420 | } | |
421 | ||
1da177e4 LT |
422 | MODULE_LICENSE("GPL"); |
423 | ||
424 | #include "NCR5380.c" | |
425 | ||
426 | static int dtc_release(struct Scsi_Host *shost) | |
427 | { | |
54d8fe44 FT |
428 | struct NCR5380_hostdata *hostdata = shost_priv(shost); |
429 | ||
22f5f10d | 430 | if (shost->irq != NO_IRQ) |
1e641664 | 431 | free_irq(shost->irq, shost); |
1da177e4 | 432 | NCR5380_exit(shost); |
1da177e4 | 433 | scsi_unregister(shost); |
54d8fe44 | 434 | iounmap(hostdata->base); |
1da177e4 LT |
435 | return 0; |
436 | } | |
437 | ||
d0be4a7d | 438 | static struct scsi_host_template driver_template = { |
aa2e2cb1 FT |
439 | .name = "DTC 3180/3280", |
440 | .detect = dtc_detect, | |
441 | .release = dtc_release, | |
442 | .proc_name = "dtc3x80", | |
443 | .show_info = dtc_show_info, | |
444 | .write_info = dtc_write_info, | |
445 | .info = dtc_info, | |
446 | .queuecommand = dtc_queue_command, | |
447 | .eh_abort_handler = dtc_abort, | |
448 | .eh_bus_reset_handler = dtc_bus_reset, | |
449 | .bios_param = dtc_biosparam, | |
450 | .can_queue = 32, | |
451 | .this_id = 7, | |
452 | .sg_tablesize = SG_ALL, | |
453 | .cmd_per_lun = 2, | |
454 | .use_clustering = DISABLE_CLUSTERING, | |
32b26a10 | 455 | .cmd_size = NCR5380_CMD_SIZE, |
0a4e3612 | 456 | .max_sectors = 128, |
1da177e4 LT |
457 | }; |
458 | #include "scsi_module.c" |