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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 | 152 | { |
d5f7e65d | 153 | static int commandline_current; |
1da177e4 | 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 | 190 | { |
d5f7e65d | 191 | static int current_override, current_base; |
1da177e4 LT |
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) { | |
2f7dba9f FT |
208 | dprintk(NDEBUG_INIT, "dtc: probing address 0x%08x\n", |
209 | (unsigned int)bases[current_base].address); | |
1da177e4 LT |
210 | if (bases[current_base].noauto) |
211 | continue; | |
212 | base = ioremap(bases[current_base].address, 0x2000); | |
213 | if (!base) | |
214 | continue; | |
215 | for (sig = 0; sig < NO_SIGNATURES; ++sig) { | |
216 | if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { | |
217 | addr = bases[current_base].address; | |
2f7dba9f | 218 | dprintk(NDEBUG_INIT, "dtc: detected board\n"); |
1da177e4 LT |
219 | goto found; |
220 | } | |
221 | } | |
222 | iounmap(base); | |
223 | } | |
224 | ||
2f7dba9f | 225 | dprintk(NDEBUG_INIT, "dtc: addr = 0x%08x\n", addr); |
1da177e4 LT |
226 | |
227 | if (!addr) | |
228 | break; | |
229 | ||
230 | found: | |
231 | instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); | |
232 | if (instance == NULL) | |
233 | break; | |
234 | ||
235 | instance->base = addr; | |
236 | ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base; | |
237 | ||
238 | NCR5380_init(instance, 0); | |
239 | ||
240 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */ | |
241 | if (overrides[current_override].irq != IRQ_AUTO) | |
242 | instance->irq = overrides[current_override].irq; | |
243 | else | |
244 | instance->irq = NCR5380_probe_irq(instance, DTC_IRQS); | |
245 | ||
22f5f10d FT |
246 | /* Compatibility with documented NCR5380 kernel parameters */ |
247 | if (instance->irq == 255) | |
248 | instance->irq = NO_IRQ; | |
249 | ||
1da177e4 LT |
250 | #ifndef DONT_USE_INTR |
251 | /* With interrupts enabled, it will sometimes hang when doing heavy | |
252 | * reads. So better not enable them until I finger it out. */ | |
22f5f10d | 253 | if (instance->irq != NO_IRQ) |
4909cc2b | 254 | if (request_irq(instance->irq, dtc_intr, 0, |
1e641664 | 255 | "dtc", instance)) { |
1da177e4 | 256 | printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); |
22f5f10d | 257 | instance->irq = NO_IRQ; |
1da177e4 LT |
258 | } |
259 | ||
22f5f10d | 260 | if (instance->irq == NO_IRQ) { |
1da177e4 LT |
261 | printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); |
262 | printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
263 | } | |
264 | #else | |
22f5f10d | 265 | if (instance->irq != NO_IRQ) |
1da177e4 | 266 | printk(KERN_WARNING "scsi%d : interrupts not used. Might as well not jumper it.\n", instance->host_no); |
22f5f10d | 267 | instance->irq = NO_IRQ; |
1da177e4 | 268 | #endif |
2f7dba9f FT |
269 | dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n", |
270 | instance->host_no, instance->irq); | |
1da177e4 | 271 | |
1da177e4 LT |
272 | ++current_override; |
273 | ++count; | |
274 | } | |
275 | return count; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
280 | * | |
281 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
282 | * the specified device / size. | |
283 | * | |
284 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
285 | * major / minor, ip[] = {heads, sectors, cylinders} | |
286 | * | |
287 | * Returns : always 0 (success), initializes ip | |
288 | * | |
289 | */ | |
290 | ||
291 | /* | |
292 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
293 | * using hard disks on a trantor should verify that this mapping corresponds | |
294 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
295 | * and matching the H_C_S coordinates to what DOS uses. | |
296 | */ | |
297 | ||
298 | static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev, | |
299 | sector_t capacity, int *ip) | |
300 | { | |
301 | int size = capacity; | |
302 | ||
303 | ip[0] = 64; | |
304 | ip[1] = 32; | |
305 | ip[2] = size >> 11; | |
306 | return 0; | |
307 | } | |
308 | ||
309 | ||
310 | /**************************************************************** | |
311 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
312 | * unsigned char *dst, int len) | |
313 | * | |
314 | * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to | |
315 | * dst | |
316 | * | |
317 | * Inputs : dst = destination, len = length in bytes | |
318 | * | |
319 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
320 | * timeout. | |
321 | */ | |
322 | ||
1da177e4 LT |
323 | static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) |
324 | { | |
325 | unsigned char *d = dst; | |
326 | int i; /* For counting time spent in the poll-loop */ | |
a9c2dc43 | 327 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 LT |
328 | |
329 | i = 0; | |
330 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
331 | NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); | |
22f5f10d | 332 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
333 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ); |
334 | else | |
335 | NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE); | |
336 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
337 | rtrc(1); | |
338 | while (len > 0) { | |
339 | rtrc(2); | |
340 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
341 | ++i; | |
342 | rtrc(3); | |
54d8fe44 | 343 | memcpy_fromio(d, hostdata->base + DTC_DATA_BUF, 128); |
1da177e4 LT |
344 | d += 128; |
345 | len -= 128; | |
346 | rtrc(7); | |
347 | /*** with int's on, it sometimes hangs after here. | |
348 | * Looks like something makes HBNR go away. */ | |
349 | } | |
350 | rtrc(4); | |
351 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
352 | ++i; | |
353 | NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ | |
354 | rtrc(0); | |
355 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
a9c2dc43 FT |
356 | if (i > hostdata->spin_max_r) |
357 | hostdata->spin_max_r = i; | |
1da177e4 LT |
358 | return (0); |
359 | } | |
360 | ||
361 | /**************************************************************** | |
362 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
363 | * unsigned char *src, int len) | |
364 | * | |
365 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
366 | * src | |
367 | * | |
368 | * Inputs : src = source, len = length in bytes | |
369 | * | |
370 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
371 | * timeout. | |
372 | */ | |
373 | ||
374 | static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) | |
375 | { | |
376 | int i; | |
a9c2dc43 | 377 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
1da177e4 LT |
378 | |
379 | NCR5380_read(RESET_PARITY_INTERRUPT_REG); | |
380 | NCR5380_write(MODE_REG, MR_ENABLE_EOP_INTR | MR_DMA_MODE); | |
381 | /* set direction (write) */ | |
22f5f10d | 382 | if (instance->irq == NO_IRQ) |
1da177e4 LT |
383 | NCR5380_write(DTC_CONTROL_REG, 0); |
384 | else | |
385 | NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); | |
386 | NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */ | |
387 | for (i = 0; len > 0; ++i) { | |
388 | rtrc(5); | |
389 | /* Poll until the host buffer can accept data. */ | |
390 | while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY) | |
391 | ++i; | |
392 | rtrc(3); | |
54d8fe44 | 393 | memcpy_toio(hostdata->base + DTC_DATA_BUF, src, 128); |
1da177e4 LT |
394 | src += 128; |
395 | len -= 128; | |
396 | } | |
397 | rtrc(4); | |
398 | while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS)) | |
399 | ++i; | |
400 | rtrc(6); | |
401 | /* Wait until the last byte has been sent to the disk */ | |
402 | while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) | |
403 | ++i; | |
404 | rtrc(7); | |
405 | /* Check for parity error here. fixme. */ | |
406 | NCR5380_write(MODE_REG, 0); /* Clear the operating mode */ | |
407 | rtrc(0); | |
a9c2dc43 FT |
408 | if (i > hostdata->spin_max_w) |
409 | hostdata->spin_max_w = i; | |
1da177e4 LT |
410 | return (0); |
411 | } | |
412 | ||
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 LT |
423 | NCR5380_exit(shost); |
424 | if (shost->io_port && shost->n_io_port) | |
425 | release_region(shost->io_port, shost->n_io_port); | |
426 | scsi_unregister(shost); | |
54d8fe44 | 427 | iounmap(hostdata->base); |
1da177e4 LT |
428 | return 0; |
429 | } | |
430 | ||
d0be4a7d | 431 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
432 | .name = "DTC 3180/3280 ", |
433 | .detect = dtc_detect, | |
434 | .release = dtc_release, | |
4d3d2a54 FT |
435 | .proc_name = "dtc3x80", |
436 | .show_info = dtc_show_info, | |
437 | .write_info = dtc_write_info, | |
8c32513b | 438 | .info = dtc_info, |
1da177e4 LT |
439 | .queuecommand = dtc_queue_command, |
440 | .eh_abort_handler = dtc_abort, | |
441 | .eh_bus_reset_handler = dtc_bus_reset, | |
1da177e4 LT |
442 | .bios_param = dtc_biosparam, |
443 | .can_queue = CAN_QUEUE, | |
444 | .this_id = 7, | |
445 | .sg_tablesize = SG_ALL, | |
446 | .cmd_per_lun = CMD_PER_LUN, | |
447 | .use_clustering = DISABLE_CLUSTERING, | |
448 | }; | |
449 | #include "scsi_module.c" |