Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * DTC 3180/3280 driver, by | |
3 | * Ray Van Tassle rayvt@comm.mot.com | |
4 | * | |
5 | * taken from ... | |
6 | * Trantor T128/T128F/T228 driver by... | |
7 | * | |
8 | * Drew Eckhardt | |
9 | * Visionary Computing | |
10 | * (Unix and Linux consulting and custom programming) | |
11 | * drew@colorado.edu | |
12 | * +1 (303) 440-4894 | |
3f9e986e | 13 | */ |
1da177e4 LT |
14 | |
15 | /* | |
1da177e4 LT |
16 | * The card is detected and initialized in one of several ways : |
17 | * 1. Autoprobe (default) - since the board is memory mapped, | |
18 | * a BIOS signature is scanned for to locate the registers. | |
19 | * An interrupt is triggered to autoprobe for the interrupt | |
20 | * line. | |
21 | * | |
22 | * 2. With command line overrides - dtc=address,irq may be | |
23 | * used on the LILO command line to override the defaults. | |
24 | * | |
25 | */ | |
26 | ||
27 | /*----------------------------------------------------------------*/ | |
28 | /* the following will set the monitor border color (useful to find | |
29 | where something crashed or gets stuck at */ | |
30 | /* 1 = blue | |
31 | 2 = green | |
32 | 3 = cyan | |
33 | 4 = red | |
34 | 5 = magenta | |
35 | 6 = yellow | |
36 | 7 = white | |
37 | */ | |
38 | #if 0 | |
39 | #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);} | |
40 | #else | |
41 | #define rtrc(i) {} | |
42 | #endif | |
43 | ||
44 | ||
1da177e4 | 45 | #include <linux/module.h> |
1da177e4 | 46 | #include <linux/blkdev.h> |
1da177e4 LT |
47 | #include <linux/string.h> |
48 | #include <linux/init.h> | |
49 | #include <linux/interrupt.h> | |
53d5ed62 | 50 | #include <linux/io.h> |
1da177e4 | 51 | #include <scsi/scsi_host.h> |
161c0059 | 52 | |
1da177e4 | 53 | #include "dtc.h" |
1da177e4 LT |
54 | #include "NCR5380.h" |
55 | ||
1da177e4 LT |
56 | /* |
57 | * The DTC3180 & 3280 boards are memory mapped. | |
58 | * | |
59 | */ | |
60 | ||
61 | /* | |
62 | */ | |
63 | /* Offset from DTC_5380_OFFSET */ | |
64 | #define DTC_CONTROL_REG 0x100 /* rw */ | |
65 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
66 | #define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */ | |
67 | ||
68 | #define CSR_RESET 0x80 /* wo Resets 53c400 */ | |
69 | #define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */ | |
70 | #define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */ | |
71 | #define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */ | |
72 | #define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */ | |
73 | #define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */ | |
74 | #define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */ | |
75 | #define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */ | |
76 | #define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */ | |
77 | #define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR) | |
78 | ||
79 | ||
80 | #define DTC_BLK_CNT 0x101 /* rw | |
81 | * # of 128-byte blocks to transfer */ | |
82 | ||
83 | ||
84 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
85 | ||
86 | #define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */ | |
87 | #define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer | |
88 | * after disconnect/reconnect*/ | |
89 | ||
90 | #define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */ | |
91 | ||
92 | /*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */ | |
93 | #define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */ | |
94 | ||
95 | static struct override { | |
96 | unsigned int address; | |
97 | int irq; | |
98 | } overrides | |
99 | #ifdef OVERRIDE | |
100 | [] __initdata = OVERRIDE; | |
101 | #else | |
1fbe8529 AC |
102 | [4] __initdata = { |
103 | { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO } | |
104 | }; | |
1da177e4 LT |
105 | #endif |
106 | ||
6391a113 | 107 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
1da177e4 LT |
108 | |
109 | static struct base { | |
110 | unsigned long address; | |
111 | int noauto; | |
6391a113 TK |
112 | } bases[] __initdata = { |
113 | { 0xcc000, 0 }, | |
114 | { 0xc8000, 0 }, | |
115 | { 0xdc000, 0 }, | |
1da177e4 LT |
116 | { 0xd8000, 0 } |
117 | }; | |
118 | ||
6391a113 | 119 | #define NO_BASES ARRAY_SIZE(bases) |
1da177e4 LT |
120 | |
121 | static const struct signature { | |
122 | const char *string; | |
123 | int offset; | |
6391a113 | 124 | } signatures[] = { |
1da177e4 LT |
125 | {"DATA TECHNOLOGY CORPORATION BIOS", 0x25}, |
126 | }; | |
127 | ||
6391a113 | 128 | #define NO_SIGNATURES ARRAY_SIZE(signatures) |
1da177e4 LT |
129 | |
130 | #ifndef MODULE | |
131 | /* | |
132 | * Function : dtc_setup(char *str, int *ints) | |
133 | * | |
134 | * Purpose : LILO command line initialization of the overrides array, | |
6391a113 | 135 | * |
1da177e4 LT |
136 | * Inputs : str - unused, ints - array of integer parameters with ints[0] |
137 | * equal to the number of ints. | |
138 | * | |
1fbe8529 | 139 | */ |
1da177e4 | 140 | |
925e4610 | 141 | static int __init dtc_setup(char *str) |
1da177e4 | 142 | { |
d5f7e65d | 143 | static int commandline_current; |
1da177e4 | 144 | int i; |
925e4610 FT |
145 | int ints[10]; |
146 | ||
147 | get_options(str, ARRAY_SIZE(ints), ints); | |
1da177e4 LT |
148 | if (ints[0] != 2) |
149 | printk("dtc_setup: usage dtc=address,irq\n"); | |
150 | else if (commandline_current < NO_OVERRIDES) { | |
151 | overrides[commandline_current].address = ints[1]; | |
152 | overrides[commandline_current].irq = ints[2]; | |
153 | for (i = 0; i < NO_BASES; ++i) | |
154 | if (bases[i].address == ints[1]) { | |
155 | bases[i].noauto = 1; | |
156 | break; | |
157 | } | |
158 | ++commandline_current; | |
159 | } | |
925e4610 | 160 | return 1; |
1da177e4 | 161 | } |
925e4610 FT |
162 | |
163 | __setup("dtc=", dtc_setup); | |
1da177e4 LT |
164 | #endif |
165 | ||
166 | /* | |
d0be4a7d | 167 | * Function : int dtc_detect(struct scsi_host_template * tpnt) |
1da177e4 LT |
168 | * |
169 | * Purpose : detects and initializes DTC 3180/3280 controllers | |
170 | * that were autoprobed, overridden on the LILO command line, | |
171 | * or specified at compile time. | |
172 | * | |
173 | * Inputs : tpnt - template for this SCSI adapter. | |
174 | * | |
175 | * Returns : 1 if a host adapter was found, 0 if not. | |
176 | * | |
177 | */ | |
178 | ||
d0be4a7d | 179 | static int __init dtc_detect(struct scsi_host_template * tpnt) |
1da177e4 | 180 | { |
d5f7e65d | 181 | static int current_override, current_base; |
1da177e4 LT |
182 | struct Scsi_Host *instance; |
183 | unsigned int addr; | |
184 | void __iomem *base; | |
185 | int sig, count; | |
186 | ||
1da177e4 LT |
187 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { |
188 | addr = 0; | |
189 | base = NULL; | |
190 | ||
191 | if (overrides[current_override].address) { | |
192 | addr = overrides[current_override].address; | |
193 | base = ioremap(addr, 0x2000); | |
194 | if (!base) | |
195 | addr = 0; | |
196 | } else | |
197 | for (; !addr && (current_base < NO_BASES); ++current_base) { | |
2f7dba9f FT |
198 | dprintk(NDEBUG_INIT, "dtc: probing address 0x%08x\n", |
199 | (unsigned int)bases[current_base].address); | |
1da177e4 LT |
200 | if (bases[current_base].noauto) |
201 | continue; | |
202 | base = ioremap(bases[current_base].address, 0x2000); | |
203 | if (!base) | |
204 | continue; | |
205 | for (sig = 0; sig < NO_SIGNATURES; ++sig) { | |
206 | if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { | |
207 | addr = bases[current_base].address; | |
2f7dba9f | 208 | dprintk(NDEBUG_INIT, "dtc: detected board\n"); |
1da177e4 LT |
209 | goto found; |
210 | } | |
211 | } | |
212 | iounmap(base); | |
213 | } | |
214 | ||
2f7dba9f | 215 | dprintk(NDEBUG_INIT, "dtc: addr = 0x%08x\n", addr); |
1da177e4 LT |
216 | |
217 | if (!addr) | |
218 | break; | |
219 | ||
220 | found: | |
221 | instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); | |
222 | if (instance == NULL) | |
0ad0eff9 | 223 | goto out_unmap; |
1da177e4 LT |
224 | |
225 | instance->base = addr; | |
226 | ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base; | |
227 | ||
8053b0ee | 228 | if (NCR5380_init(instance, FLAG_LATE_DMA_SETUP)) |
0ad0eff9 | 229 | goto out_unregister; |
1da177e4 | 230 | |
b6488f97 FT |
231 | NCR5380_maybe_reset_bus(instance); |
232 | ||
1da177e4 LT |
233 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */ |
234 | if (overrides[current_override].irq != IRQ_AUTO) | |
235 | instance->irq = overrides[current_override].irq; | |
236 | else | |
237 | instance->irq = NCR5380_probe_irq(instance, DTC_IRQS); | |
238 | ||
22f5f10d FT |
239 | /* Compatibility with documented NCR5380 kernel parameters */ |
240 | if (instance->irq == 255) | |
241 | instance->irq = NO_IRQ; | |
242 | ||
1da177e4 LT |
243 | /* With interrupts enabled, it will sometimes hang when doing heavy |
244 | * reads. So better not enable them until I finger it out. */ | |
a46865dc FT |
245 | instance->irq = NO_IRQ; |
246 | ||
22f5f10d | 247 | if (instance->irq != NO_IRQ) |
4909cc2b | 248 | if (request_irq(instance->irq, dtc_intr, 0, |
1e641664 | 249 | "dtc", instance)) { |
1da177e4 | 250 | printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); |
22f5f10d | 251 | instance->irq = NO_IRQ; |
1da177e4 LT |
252 | } |
253 | ||
22f5f10d | 254 | if (instance->irq == NO_IRQ) { |
1da177e4 LT |
255 | printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); |
256 | printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
257 | } | |
a46865dc | 258 | |
2f7dba9f FT |
259 | dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n", |
260 | instance->host_no, instance->irq); | |
1da177e4 | 261 | |
1da177e4 LT |
262 | ++current_override; |
263 | ++count; | |
264 | } | |
265 | return count; | |
0ad0eff9 FT |
266 | |
267 | out_unregister: | |
268 | scsi_unregister(instance); | |
269 | out_unmap: | |
270 | iounmap(base); | |
271 | return count; | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* | |
275 | * Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
276 | * | |
277 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
278 | * the specified device / size. | |
279 | * | |
280 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
281 | * major / minor, ip[] = {heads, sectors, cylinders} | |
282 | * | |
283 | * Returns : always 0 (success), initializes ip | |
284 | * | |
285 | */ | |
286 | ||
287 | /* | |
288 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
289 | * using hard disks on a trantor should verify that this mapping corresponds | |
290 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
291 | * and matching the H_C_S coordinates to what DOS uses. | |
292 | */ | |
293 | ||
294 | static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev, | |
295 | sector_t capacity, int *ip) | |
296 | { | |
297 | int size = capacity; | |
298 | ||
299 | ip[0] = 64; | |
300 | ip[1] = 32; | |
301 | ip[2] = size >> 11; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | ||
306 | /**************************************************************** | |
307 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
308 | * unsigned char *dst, int len) | |
309 | * | |
310 | * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to | |
311 | * dst | |
312 | * | |
313 | * Inputs : dst = destination, len = length in bytes | |
314 | * | |
315 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
316 | * timeout. | |
317 | */ | |
318 | ||
6c4b88ca FT |
319 | static inline int dtc_pread(struct Scsi_Host *instance, |
320 | unsigned char *dst, int len) | |
1da177e4 LT |
321 | { |
322 | unsigned char *d = dst; | |
323 | int i; /* For counting time spent in the poll-loop */ | |
a9c2dc43 | 324 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 LT |
325 | |
326 | i = 0; | |
22f5f10d | 327 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
328 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ); |
329 | else | |
330 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE); | |
331 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
332 | rtrc(1); | |
333 | while (len > 0) { | |
334 | rtrc(2); | |
335 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
336 | ++i; | |
337 | rtrc(3); | |
54d8fe44 | 338 | memcpy_fromio(d, hostdata->base + DTC_DATA_BUF, 128); |
1da177e4 LT |
339 | d += 128; |
340 | len -= 128; | |
341 | rtrc(7); | |
342 | /*** with int's on, it sometimes hangs after here. | |
343 | * Looks like something makes HBNR go away. */ | |
344 | } | |
345 | rtrc(4); | |
346 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
347 | ++i; | |
1da177e4 | 348 | rtrc(0); |
1da177e4 LT |
349 | return (0); |
350 | } | |
351 | ||
352 | /**************************************************************** | |
353 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
354 | * unsigned char *src, int len) | |
355 | * | |
356 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
357 | * src | |
358 | * | |
359 | * Inputs : src = source, len = length in bytes | |
360 | * | |
361 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
362 | * timeout. | |
363 | */ | |
364 | ||
6c4b88ca FT |
365 | static inline int dtc_pwrite(struct Scsi_Host *instance, |
366 | unsigned char *src, int len) | |
1da177e4 LT |
367 | { |
368 | int i; | |
a9c2dc43 | 369 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 | 370 | |
22f5f10d | 371 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
372 | NCR5380_write(DTC_CONTROL_REG, 0); |
373 | else | |
374 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); | |
375 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
376 | for (i = 0; len > 0; ++i) { | |
377 | rtrc(5); | |
378 | /* Poll until the host buffer can accept data. */ | |
379 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
380 | ++i; | |
381 | rtrc(3); | |
54d8fe44 | 382 | memcpy_toio(hostdata->base + DTC_DATA_BUF, src, 128); |
1da177e4 LT |
383 | src += 128; |
384 | len -= 128; | |
385 | } | |
386 | rtrc(4); | |
387 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
388 | ++i; | |
389 | rtrc(6); | |
390 | /* Wait until the last byte has been sent to the disk */ | |
391 | while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) | |
392 | ++i; | |
393 | rtrc(7); | |
394 | /* Check for parity error here. fixme. */ | |
1da177e4 | 395 | rtrc(0); |
1da177e4 LT |
396 | return (0); |
397 | } | |
398 | ||
ff3d4578 FT |
399 | static int dtc_dma_xfer_len(struct scsi_cmnd *cmd) |
400 | { | |
401 | int transfersize = cmd->transfersize; | |
402 | ||
403 | /* Limit transfers to 32K, for xx400 & xx406 | |
404 | * pseudoDMA that transfers in 128 bytes blocks. | |
405 | */ | |
406 | if (transfersize > 32 * 1024 && cmd->SCp.this_residual && | |
407 | !(cmd->SCp.this_residual % transfersize)) | |
408 | transfersize = 32 * 1024; | |
409 | ||
410 | return transfersize; | |
411 | } | |
412 | ||
1da177e4 LT |
413 | MODULE_LICENSE("GPL"); |
414 | ||
415 | #include "NCR5380.c" | |
416 | ||
417 | static int dtc_release(struct Scsi_Host *shost) | |
418 | { | |
54d8fe44 FT |
419 | struct NCR5380_hostdata *hostdata = shost_priv(shost); |
420 | ||
22f5f10d | 421 | if (shost->irq != NO_IRQ) |
1e641664 | 422 | free_irq(shost->irq, shost); |
1da177e4 | 423 | NCR5380_exit(shost); |
1da177e4 | 424 | scsi_unregister(shost); |
54d8fe44 | 425 | iounmap(hostdata->base); |
1da177e4 LT |
426 | return 0; |
427 | } | |
428 | ||
d0be4a7d | 429 | static struct scsi_host_template driver_template = { |
aa2e2cb1 FT |
430 | .name = "DTC 3180/3280", |
431 | .detect = dtc_detect, | |
432 | .release = dtc_release, | |
433 | .proc_name = "dtc3x80", | |
aa2e2cb1 FT |
434 | .info = dtc_info, |
435 | .queuecommand = dtc_queue_command, | |
436 | .eh_abort_handler = dtc_abort, | |
437 | .eh_bus_reset_handler = dtc_bus_reset, | |
438 | .bios_param = dtc_biosparam, | |
439 | .can_queue = 32, | |
440 | .this_id = 7, | |
441 | .sg_tablesize = SG_ALL, | |
442 | .cmd_per_lun = 2, | |
443 | .use_clustering = DISABLE_CLUSTERING, | |
32b26a10 | 444 | .cmd_size = NCR5380_CMD_SIZE, |
0a4e3612 | 445 | .max_sectors = 128, |
1da177e4 LT |
446 | }; |
447 | #include "scsi_module.c" |