Commit | Line | Data |
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1da177e4 | 1 | |
1da177e4 LT |
2 | #define PSEUDO_DMA |
3 | #define DONT_USE_INTR | |
4 | #define UNSAFE /* Leave interrupts enabled during pseudo-dma I/O */ | |
1da177e4 LT |
5 | #define DMA_WORKS_RIGHT |
6 | ||
7 | ||
8 | /* | |
9 | * DTC 3180/3280 driver, by | |
10 | * Ray Van Tassle rayvt@comm.mot.com | |
11 | * | |
12 | * taken from ... | |
13 | * Trantor T128/T128F/T228 driver by... | |
14 | * | |
15 | * Drew Eckhardt | |
16 | * Visionary Computing | |
17 | * (Unix and Linux consulting and custom programming) | |
18 | * drew@colorado.edu | |
19 | * +1 (303) 440-4894 | |
3f9e986e | 20 | */ |
1da177e4 LT |
21 | |
22 | /* | |
1da177e4 LT |
23 | * The card is detected and initialized in one of several ways : |
24 | * 1. Autoprobe (default) - since the board is memory mapped, | |
25 | * a BIOS signature is scanned for to locate the registers. | |
26 | * An interrupt is triggered to autoprobe for the interrupt | |
27 | * line. | |
28 | * | |
29 | * 2. With command line overrides - dtc=address,irq may be | |
30 | * used on the LILO command line to override the defaults. | |
31 | * | |
32 | */ | |
33 | ||
34 | /*----------------------------------------------------------------*/ | |
35 | /* the following will set the monitor border color (useful to find | |
36 | where something crashed or gets stuck at */ | |
37 | /* 1 = blue | |
38 | 2 = green | |
39 | 3 = cyan | |
40 | 4 = red | |
41 | 5 = magenta | |
42 | 6 = yellow | |
43 | 7 = white | |
44 | */ | |
45 | #if 0 | |
46 | #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);} | |
47 | #else | |
48 | #define rtrc(i) {} | |
49 | #endif | |
50 | ||
51 | ||
1da177e4 LT |
52 | #include <linux/module.h> |
53 | #include <linux/signal.h> | |
1da177e4 LT |
54 | #include <linux/blkdev.h> |
55 | #include <linux/delay.h> | |
56 | #include <linux/stat.h> | |
57 | #include <linux/string.h> | |
58 | #include <linux/init.h> | |
59 | #include <linux/interrupt.h> | |
53d5ed62 | 60 | #include <linux/io.h> |
1da177e4 LT |
61 | #include <scsi/scsi_host.h> |
62 | #include "dtc.h" | |
63 | #define AUTOPROBE_IRQ | |
64 | #include "NCR5380.h" | |
65 | ||
1da177e4 LT |
66 | /* |
67 | * The DTC3180 & 3280 boards are memory mapped. | |
68 | * | |
69 | */ | |
70 | ||
71 | /* | |
72 | */ | |
73 | /* Offset from DTC_5380_OFFSET */ | |
74 | #define DTC_CONTROL_REG 0x100 /* rw */ | |
75 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
76 | #define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */ | |
77 | ||
78 | #define CSR_RESET 0x80 /* wo Resets 53c400 */ | |
79 | #define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */ | |
80 | #define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */ | |
81 | #define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */ | |
82 | #define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */ | |
83 | #define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */ | |
84 | #define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */ | |
85 | #define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */ | |
86 | #define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */ | |
87 | #define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR) | |
88 | ||
89 | ||
90 | #define DTC_BLK_CNT 0x101 /* rw | |
91 | * # of 128-byte blocks to transfer */ | |
92 | ||
93 | ||
94 | #define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */ | |
95 | ||
96 | #define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */ | |
97 | #define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer | |
98 | * after disconnect/reconnect*/ | |
99 | ||
100 | #define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */ | |
101 | ||
102 | /*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */ | |
103 | #define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */ | |
104 | ||
105 | static struct override { | |
106 | unsigned int address; | |
107 | int irq; | |
108 | } overrides | |
109 | #ifdef OVERRIDE | |
110 | [] __initdata = OVERRIDE; | |
111 | #else | |
1fbe8529 AC |
112 | [4] __initdata = { |
113 | { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO } | |
114 | }; | |
1da177e4 LT |
115 | #endif |
116 | ||
6391a113 | 117 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
1da177e4 LT |
118 | |
119 | static struct base { | |
120 | unsigned long address; | |
121 | int noauto; | |
6391a113 TK |
122 | } bases[] __initdata = { |
123 | { 0xcc000, 0 }, | |
124 | { 0xc8000, 0 }, | |
125 | { 0xdc000, 0 }, | |
1da177e4 LT |
126 | { 0xd8000, 0 } |
127 | }; | |
128 | ||
6391a113 | 129 | #define NO_BASES ARRAY_SIZE(bases) |
1da177e4 LT |
130 | |
131 | static const struct signature { | |
132 | const char *string; | |
133 | int offset; | |
6391a113 | 134 | } signatures[] = { |
1da177e4 LT |
135 | {"DATA TECHNOLOGY CORPORATION BIOS", 0x25}, |
136 | }; | |
137 | ||
6391a113 | 138 | #define NO_SIGNATURES ARRAY_SIZE(signatures) |
1da177e4 LT |
139 | |
140 | #ifndef MODULE | |
141 | /* | |
142 | * Function : dtc_setup(char *str, int *ints) | |
143 | * | |
144 | * Purpose : LILO command line initialization of the overrides array, | |
6391a113 | 145 | * |
1da177e4 LT |
146 | * Inputs : str - unused, ints - array of integer parameters with ints[0] |
147 | * equal to the number of ints. | |
148 | * | |
1fbe8529 | 149 | */ |
1da177e4 | 150 | |
925e4610 | 151 | static int __init dtc_setup(char *str) |
1da177e4 LT |
152 | { |
153 | static int commandline_current = 0; | |
154 | int i; | |
925e4610 FT |
155 | int ints[10]; |
156 | ||
157 | get_options(str, ARRAY_SIZE(ints), ints); | |
1da177e4 LT |
158 | if (ints[0] != 2) |
159 | printk("dtc_setup: usage dtc=address,irq\n"); | |
160 | else if (commandline_current < NO_OVERRIDES) { | |
161 | overrides[commandline_current].address = ints[1]; | |
162 | overrides[commandline_current].irq = ints[2]; | |
163 | for (i = 0; i < NO_BASES; ++i) | |
164 | if (bases[i].address == ints[1]) { | |
165 | bases[i].noauto = 1; | |
166 | break; | |
167 | } | |
168 | ++commandline_current; | |
169 | } | |
925e4610 | 170 | return 1; |
1da177e4 | 171 | } |
925e4610 FT |
172 | |
173 | __setup("dtc=", dtc_setup); | |
1da177e4 LT |
174 | #endif |
175 | ||
176 | /* | |
d0be4a7d | 177 | * Function : int dtc_detect(struct scsi_host_template * tpnt) |
1da177e4 LT |
178 | * |
179 | * Purpose : detects and initializes DTC 3180/3280 controllers | |
180 | * that were autoprobed, overridden on the LILO command line, | |
181 | * or specified at compile time. | |
182 | * | |
183 | * Inputs : tpnt - template for this SCSI adapter. | |
184 | * | |
185 | * Returns : 1 if a host adapter was found, 0 if not. | |
186 | * | |
187 | */ | |
188 | ||
d0be4a7d | 189 | static int __init dtc_detect(struct scsi_host_template * tpnt) |
1da177e4 LT |
190 | { |
191 | static int current_override = 0, current_base = 0; | |
192 | struct Scsi_Host *instance; | |
193 | unsigned int addr; | |
194 | void __iomem *base; | |
195 | int sig, count; | |
196 | ||
1da177e4 LT |
197 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { |
198 | addr = 0; | |
199 | base = NULL; | |
200 | ||
201 | if (overrides[current_override].address) { | |
202 | addr = overrides[current_override].address; | |
203 | base = ioremap(addr, 0x2000); | |
204 | if (!base) | |
205 | addr = 0; | |
206 | } else | |
207 | for (; !addr && (current_base < NO_BASES); ++current_base) { | |
208 | #if (DTCDEBUG & DTCDEBUG_INIT) | |
1fbe8529 | 209 | printk(KERN_DEBUG "scsi-dtc : probing address %08x\n", bases[current_base].address); |
1da177e4 LT |
210 | #endif |
211 | if (bases[current_base].noauto) | |
212 | continue; | |
213 | base = ioremap(bases[current_base].address, 0x2000); | |
214 | if (!base) | |
215 | continue; | |
216 | for (sig = 0; sig < NO_SIGNATURES; ++sig) { | |
217 | if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { | |
218 | addr = bases[current_base].address; | |
219 | #if (DTCDEBUG & DTCDEBUG_INIT) | |
5307b1e8 | 220 | printk(KERN_DEBUG "scsi-dtc : detected board.\n"); |
1da177e4 LT |
221 | #endif |
222 | goto found; | |
223 | } | |
224 | } | |
225 | iounmap(base); | |
226 | } | |
227 | ||
228 | #if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT) | |
1fbe8529 | 229 | printk(KERN_DEBUG "scsi-dtc : base = %08x\n", addr); |
1da177e4 LT |
230 | #endif |
231 | ||
232 | if (!addr) | |
233 | break; | |
234 | ||
235 | found: | |
236 | instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); | |
237 | if (instance == NULL) | |
238 | break; | |
239 | ||
240 | instance->base = addr; | |
241 | ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base; | |
242 | ||
243 | NCR5380_init(instance, 0); | |
244 | ||
245 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */ | |
246 | if (overrides[current_override].irq != IRQ_AUTO) | |
247 | instance->irq = overrides[current_override].irq; | |
248 | else | |
249 | instance->irq = NCR5380_probe_irq(instance, DTC_IRQS); | |
250 | ||
22f5f10d FT |
251 | /* Compatibility with documented NCR5380 kernel parameters */ |
252 | if (instance->irq == 255) | |
253 | instance->irq = NO_IRQ; | |
254 | ||
1da177e4 LT |
255 | #ifndef DONT_USE_INTR |
256 | /* With interrupts enabled, it will sometimes hang when doing heavy | |
257 | * reads. So better not enable them until I finger it out. */ | |
22f5f10d | 258 | if (instance->irq != NO_IRQ) |
4909cc2b | 259 | if (request_irq(instance->irq, dtc_intr, 0, |
1e641664 | 260 | "dtc", instance)) { |
1da177e4 | 261 | printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); |
22f5f10d | 262 | instance->irq = NO_IRQ; |
1da177e4 LT |
263 | } |
264 | ||
22f5f10d | 265 | if (instance->irq == NO_IRQ) { |
1da177e4 LT |
266 | printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); |
267 | printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
268 | } | |
269 | #else | |
22f5f10d | 270 | if (instance->irq != NO_IRQ) |
1da177e4 | 271 | printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no); |
22f5f10d | 272 | instance->irq = NO_IRQ; |
1da177e4 LT |
273 | #endif |
274 | #if defined(DTCDEBUG) && (DTCDEBUG & DTCDEBUG_INIT) | |
275 | printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); | |
276 | #endif | |
277 | ||
1da177e4 LT |
278 | ++current_override; |
279 | ++count; | |
280 | } | |
281 | return count; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
286 | * | |
287 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
288 | * the specified device / size. | |
289 | * | |
290 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
291 | * major / minor, ip[] = {heads, sectors, cylinders} | |
292 | * | |
293 | * Returns : always 0 (success), initializes ip | |
294 | * | |
295 | */ | |
296 | ||
297 | /* | |
298 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
299 | * using hard disks on a trantor should verify that this mapping corresponds | |
300 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
301 | * and matching the H_C_S coordinates to what DOS uses. | |
302 | */ | |
303 | ||
304 | static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev, | |
305 | sector_t capacity, int *ip) | |
306 | { | |
307 | int size = capacity; | |
308 | ||
309 | ip[0] = 64; | |
310 | ip[1] = 32; | |
311 | ip[2] = size >> 11; | |
312 | return 0; | |
313 | } | |
314 | ||
315 | ||
316 | /**************************************************************** | |
317 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
318 | * unsigned char *dst, int len) | |
319 | * | |
320 | * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to | |
321 | * dst | |
322 | * | |
323 | * Inputs : dst = destination, len = length in bytes | |
324 | * | |
325 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
326 | * timeout. | |
327 | */ | |
328 | ||
1da177e4 LT |
329 | static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) |
330 | { | |
331 | unsigned char *d = dst; | |
332 | int i; /* For counting time spent in the poll-loop */ | |
a9c2dc43 | 333 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 LT |
334 | NCR5380_local_declare(); |
335 | NCR5380_setup(instance); | |
336 | ||
337 | i = 0; | |
338 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
339 | NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); | |
22f5f10d | 340 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
341 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ); |
342 | else | |
343 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE); | |
344 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
345 | rtrc(1); | |
346 | while (len > 0) { | |
347 | rtrc(2); | |
348 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
349 | ++i; | |
350 | rtrc(3); | |
351 | memcpy_fromio(d, base + DTC_DATA_BUF, 128); | |
352 | d += 128; | |
353 | len -= 128; | |
354 | rtrc(7); | |
355 | /*** with int's on, it sometimes hangs after here. | |
356 | * Looks like something makes HBNR go away. */ | |
357 | } | |
358 | rtrc(4); | |
359 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
360 | ++i; | |
361 | NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ | |
362 | rtrc(0); | |
363 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
a9c2dc43 FT |
364 | if (i > hostdata->spin_max_r) |
365 | hostdata->spin_max_r = i; | |
1da177e4 LT |
366 | return (0); |
367 | } | |
368 | ||
369 | /**************************************************************** | |
370 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
371 | * unsigned char *src, int len) | |
372 | * | |
373 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
374 | * src | |
375 | * | |
376 | * Inputs : src = source, len = length in bytes | |
377 | * | |
378 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
379 | * timeout. | |
380 | */ | |
381 | ||
382 | static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) | |
383 | { | |
384 | int i; | |
a9c2dc43 | 385 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 LT |
386 | NCR5380_local_declare(); |
387 | NCR5380_setup(instance); | |
388 | ||
389 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
390 | NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); | |
391 | /* set direction (write) */ | |
22f5f10d | 392 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
393 | NCR5380_write(DTC_CONTROL_REG, 0); |
394 | else | |
395 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); | |
396 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
397 | for (i = 0; len > 0; ++i) { | |
398 | rtrc(5); | |
399 | /* Poll until the host buffer can accept data. */ | |
400 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
401 | ++i; | |
402 | rtrc(3); | |
403 | memcpy_toio(base + DTC_DATA_BUF, src, 128); | |
404 | src += 128; | |
405 | len -= 128; | |
406 | } | |
407 | rtrc(4); | |
408 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
409 | ++i; | |
410 | rtrc(6); | |
411 | /* Wait until the last byte has been sent to the disk */ | |
412 | while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) | |
413 | ++i; | |
414 | rtrc(7); | |
415 | /* Check for parity error here. fixme. */ | |
416 | NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ | |
417 | rtrc(0); | |
a9c2dc43 FT |
418 | if (i > hostdata->spin_max_w) |
419 | hostdata->spin_max_w = i; | |
1da177e4 LT |
420 | return (0); |
421 | } | |
422 | ||
423 | MODULE_LICENSE("GPL"); | |
424 | ||
425 | #include "NCR5380.c" | |
426 | ||
427 | static int dtc_release(struct Scsi_Host *shost) | |
428 | { | |
429 | NCR5380_local_declare(); | |
430 | NCR5380_setup(shost); | |
22f5f10d | 431 | if (shost->irq != NO_IRQ) |
1e641664 | 432 | free_irq(shost->irq, shost); |
1da177e4 LT |
433 | NCR5380_exit(shost); |
434 | if (shost->io_port && shost->n_io_port) | |
435 | release_region(shost->io_port, shost->n_io_port); | |
436 | scsi_unregister(shost); | |
437 | iounmap(base); | |
438 | return 0; | |
439 | } | |
440 | ||
d0be4a7d | 441 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
442 | .name = "DTC 3180/3280 ", |
443 | .detect = dtc_detect, | |
444 | .release = dtc_release, | |
4d3d2a54 FT |
445 | .proc_name = "dtc3x80", |
446 | .show_info = dtc_show_info, | |
447 | .write_info = dtc_write_info, | |
8c32513b | 448 | .info = dtc_info, |
1da177e4 LT |
449 | .queuecommand = dtc_queue_command, |
450 | .eh_abort_handler = dtc_abort, | |
451 | .eh_bus_reset_handler = dtc_bus_reset, | |
1da177e4 LT |
452 | .bios_param = dtc_biosparam, |
453 | .can_queue = CAN_QUEUE, | |
454 | .this_id = 7, | |
455 | .sg_tablesize = SG_ALL, | |
456 | .cmd_per_lun = CMD_PER_LUN, | |
457 | .use_clustering = DISABLE_CLUSTERING, | |
458 | }; | |
459 | #include "scsi_module.c" |