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1da177e4 LT |
1 | /* |
2 | * acsi_slm.c -- Device driver for the Atari SLM laser printer | |
3 | * | |
4 | * Copyright 1995 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file COPYING in the main directory of this archive for | |
8 | * more details. | |
9 | * | |
10 | */ | |
11 | ||
12 | /* | |
13 | ||
14 | Notes: | |
15 | ||
16 | The major number for SLM printers is 28 (like ACSI), but as a character | |
17 | device, not block device. The minor number is the number of the printer (if | |
18 | you have more than one SLM; currently max. 2 (#define-constant) SLMs are | |
19 | supported). The device can be opened for reading and writing. If reading it, | |
20 | you get some status infos (MODE SENSE data). Writing mode is used for the data | |
21 | to be printed. Some ioctls allow to get the printer status and to tune printer | |
22 | modes and some internal variables. | |
23 | ||
24 | A special problem of the SLM driver is the timing and thus the buffering of | |
25 | the print data. The problem is that all the data for one page must be present | |
26 | in memory when printing starts, else --when swapping occurs-- the timing could | |
27 | not be guaranteed. There are several ways to assure this: | |
28 | ||
29 | 1) Reserve a buffer of 1196k (maximum page size) statically by | |
30 | atari_stram_alloc(). The data are collected there until they're complete, | |
31 | and then printing starts. Since the buffer is reserved, no further | |
32 | considerations about memory and swapping are needed. So this is the | |
33 | simplest method, but it needs a lot of memory for just the SLM. | |
34 | ||
35 | An striking advantage of this method is (supposed the SLM_CONT_CNT_REPROG | |
36 | method works, see there), that there are no timing problems with the DMA | |
37 | anymore. | |
38 | ||
39 | 2) The other method would be to reserve the buffer dynamically each time | |
40 | printing is required. I could think of looking at mem_map where the | |
41 | largest unallocted ST-RAM area is, taking the area, and then extending it | |
42 | by swapping out the neighbored pages, until the needed size is reached. | |
43 | This requires some mm hacking, but seems possible. The only obstacle could | |
44 | be pages that cannot be swapped out (reserved pages)... | |
45 | ||
46 | 3) Another possibility would be to leave the real data in user space and to | |
47 | work with two dribble buffers of about 32k in the driver: While the one | |
48 | buffer is DMAed to the SLM, the other can be filled with new data. But | |
49 | to keep the timing, that requires that the user data remain in memory and | |
50 | are not swapped out. Requires mm hacking, too, but maybe not so bad as | |
51 | method 2). | |
52 | ||
53 | */ | |
54 | ||
55 | #include <linux/module.h> | |
56 | ||
57 | #include <linux/errno.h> | |
58 | #include <linux/sched.h> | |
59 | #include <linux/timer.h> | |
60 | #include <linux/fs.h> | |
61 | #include <linux/major.h> | |
62 | #include <linux/kernel.h> | |
63 | #include <linux/delay.h> | |
64 | #include <linux/interrupt.h> | |
65 | #include <linux/time.h> | |
66 | #include <linux/mm.h> | |
67 | #include <linux/slab.h> | |
1da177e4 LT |
68 | #include <linux/smp_lock.h> |
69 | ||
70 | #include <asm/pgtable.h> | |
71 | #include <asm/system.h> | |
72 | #include <asm/uaccess.h> | |
73 | #include <asm/atarihw.h> | |
74 | #include <asm/atariints.h> | |
75 | #include <asm/atari_acsi.h> | |
76 | #include <asm/atari_stdma.h> | |
77 | #include <asm/atari_stram.h> | |
78 | #include <asm/atari_SLM.h> | |
79 | ||
80 | ||
81 | #undef DEBUG | |
82 | ||
83 | /* Define this if the page data are continuous in physical memory. That | |
84 | * requires less reprogramming of the ST-DMA */ | |
85 | #define SLM_CONTINUOUS_DMA | |
86 | ||
87 | /* Use continuous reprogramming of the ST-DMA counter register. This is | |
88 | * --strictly speaking-- not allowed, Atari recommends not to look at the | |
89 | * counter register while a DMA is going on. But I don't know if that applies | |
90 | * only for reading the register, or also writing to it. Writing only works | |
91 | * fine for me... The advantage is that the timing becomes absolutely | |
92 | * uncritical: Just update each, say 200ms, the counter reg to its maximum, | |
93 | * and the DMA will work until the status byte interrupt occurs. | |
94 | */ | |
95 | #define SLM_CONT_CNT_REPROG | |
96 | ||
97 | #define CMDSET_TARG_LUN(cmd,targ,lun) \ | |
98 | do { \ | |
99 | cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \ | |
100 | cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \ | |
101 | } while(0) | |
102 | ||
103 | #define START_TIMER(to) mod_timer(&slm_timer, jiffies + (to)) | |
104 | #define STOP_TIMER() del_timer(&slm_timer) | |
105 | ||
106 | ||
107 | static char slmreqsense_cmd[6] = { 0x03, 0, 0, 0, 0, 0 }; | |
108 | static char slmprint_cmd[6] = { 0x0a, 0, 0, 0, 0, 0 }; | |
109 | static char slminquiry_cmd[6] = { 0x12, 0, 0, 0, 0, 0x80 }; | |
110 | static char slmmsense_cmd[6] = { 0x1a, 0, 0, 0, 255, 0 }; | |
111 | #if 0 | |
112 | static char slmmselect_cmd[6] = { 0x15, 0, 0, 0, 0, 0 }; | |
113 | #endif | |
114 | ||
115 | ||
116 | #define MAX_SLM 2 | |
117 | ||
118 | static struct slm { | |
119 | unsigned target; /* target number */ | |
120 | unsigned lun; /* LUN in target controller */ | |
121 | atomic_t wr_ok; /* set to 0 if output part busy */ | |
122 | atomic_t rd_ok; /* set to 0 if status part busy */ | |
123 | } slm_info[MAX_SLM]; | |
124 | ||
125 | int N_SLM_Printers = 0; | |
126 | ||
127 | /* printer buffer */ | |
128 | static unsigned char *SLMBuffer; /* start of buffer */ | |
129 | static unsigned char *BufferP; /* current position in buffer */ | |
130 | static int BufferSize; /* length of buffer for page size */ | |
131 | ||
132 | typedef enum { IDLE, FILLING, PRINTING } SLMSTATE; | |
133 | static SLMSTATE SLMState; | |
134 | static int SLMBufOwner; /* SLM# currently using the buffer */ | |
135 | ||
136 | /* DMA variables */ | |
137 | #ifndef SLM_CONT_CNT_REPROG | |
138 | static unsigned long SLMCurAddr; /* current base addr of DMA chunk */ | |
139 | static unsigned long SLMEndAddr; /* expected end addr */ | |
140 | static unsigned long SLMSliceSize; /* size of one DMA chunk */ | |
141 | #endif | |
142 | static int SLMError; | |
143 | ||
144 | /* wait queues */ | |
145 | static DECLARE_WAIT_QUEUE_HEAD(slm_wait); /* waiting for buffer */ | |
146 | static DECLARE_WAIT_QUEUE_HEAD(print_wait); /* waiting for printing finished */ | |
147 | ||
148 | /* status codes */ | |
149 | #define SLMSTAT_OK 0x00 | |
150 | #define SLMSTAT_ORNERY 0x02 | |
151 | #define SLMSTAT_TONER 0x03 | |
152 | #define SLMSTAT_WARMUP 0x04 | |
153 | #define SLMSTAT_PAPER 0x05 | |
154 | #define SLMSTAT_DRUM 0x06 | |
155 | #define SLMSTAT_INJAM 0x07 | |
156 | #define SLMSTAT_THRJAM 0x08 | |
157 | #define SLMSTAT_OUTJAM 0x09 | |
158 | #define SLMSTAT_COVER 0x0a | |
159 | #define SLMSTAT_FUSER 0x0b | |
160 | #define SLMSTAT_IMAGER 0x0c | |
161 | #define SLMSTAT_MOTOR 0x0d | |
162 | #define SLMSTAT_VIDEO 0x0e | |
163 | #define SLMSTAT_SYSTO 0x10 | |
164 | #define SLMSTAT_OPCODE 0x12 | |
165 | #define SLMSTAT_DEVNUM 0x15 | |
166 | #define SLMSTAT_PARAM 0x1a | |
167 | #define SLMSTAT_ACSITO 0x1b /* driver defined */ | |
168 | #define SLMSTAT_NOTALL 0x1c /* driver defined */ | |
169 | ||
170 | static char *SLMErrors[] = { | |
171 | /* 0x00 */ "OK and ready", | |
172 | /* 0x01 */ NULL, | |
173 | /* 0x02 */ "ornery printer", | |
174 | /* 0x03 */ "toner empty", | |
175 | /* 0x04 */ "warming up", | |
176 | /* 0x05 */ "paper empty", | |
177 | /* 0x06 */ "drum empty", | |
178 | /* 0x07 */ "input jam", | |
179 | /* 0x08 */ "through jam", | |
180 | /* 0x09 */ "output jam", | |
181 | /* 0x0a */ "cover open", | |
182 | /* 0x0b */ "fuser malfunction", | |
183 | /* 0x0c */ "imager malfunction", | |
184 | /* 0x0d */ "motor malfunction", | |
185 | /* 0x0e */ "video malfunction", | |
186 | /* 0x0f */ NULL, | |
187 | /* 0x10 */ "printer system timeout", | |
188 | /* 0x11 */ NULL, | |
189 | /* 0x12 */ "invalid operation code", | |
190 | /* 0x13 */ NULL, | |
191 | /* 0x14 */ NULL, | |
192 | /* 0x15 */ "invalid device number", | |
193 | /* 0x16 */ NULL, | |
194 | /* 0x17 */ NULL, | |
195 | /* 0x18 */ NULL, | |
196 | /* 0x19 */ NULL, | |
197 | /* 0x1a */ "invalid parameter list", | |
198 | /* 0x1b */ "ACSI timeout", | |
199 | /* 0x1c */ "not all printed" | |
200 | }; | |
201 | ||
202 | #define N_ERRORS (sizeof(SLMErrors)/sizeof(*SLMErrors)) | |
203 | ||
204 | /* real (driver caused) error? */ | |
205 | #define IS_REAL_ERROR(x) (x > 0x10) | |
206 | ||
207 | ||
208 | static struct { | |
209 | char *name; | |
210 | int w, h; | |
211 | } StdPageSize[] = { | |
212 | { "Letter", 2400, 3180 }, | |
213 | { "Legal", 2400, 4080 }, | |
214 | { "A4", 2336, 3386 }, | |
215 | { "B5", 2016, 2914 } | |
216 | }; | |
217 | ||
218 | #define N_STD_SIZES (sizeof(StdPageSize)/sizeof(*StdPageSize)) | |
219 | ||
220 | #define SLM_BUFFER_SIZE (2336*3386/8) /* A4 for now */ | |
221 | #define SLM_DMA_AMOUNT 255 /* #sectors to program the DMA for */ | |
222 | ||
223 | #ifdef SLM_CONTINUOUS_DMA | |
224 | # define SLM_DMA_INT_OFFSET 0 /* DMA goes until seccnt 0, no offs */ | |
225 | # define SLM_DMA_END_OFFSET 32 /* 32 Byte ST-DMA FIFO */ | |
226 | # define SLM_SLICE_SIZE(w) (255*512) | |
227 | #else | |
228 | # define SLM_DMA_INT_OFFSET 32 /* 32 Byte ST-DMA FIFO */ | |
229 | # define SLM_DMA_END_OFFSET 32 /* 32 Byte ST-DMA FIFO */ | |
230 | # define SLM_SLICE_SIZE(w) ((254*512)/(w/8)*(w/8)) | |
231 | #endif | |
232 | ||
233 | /* calculate the number of jiffies to wait for 'n' bytes */ | |
234 | #ifdef SLM_CONT_CNT_REPROG | |
235 | #define DMA_TIME_FOR(n) 50 | |
236 | #define DMA_STARTUP_TIME 0 | |
237 | #else | |
238 | #define DMA_TIME_FOR(n) (n/1400-1) | |
239 | #define DMA_STARTUP_TIME 650 | |
240 | #endif | |
241 | ||
242 | /***************************** Prototypes *****************************/ | |
243 | ||
244 | static char *slm_errstr( int stat ); | |
245 | static int slm_getstats( char *buffer, int device ); | |
246 | static ssize_t slm_read( struct file* file, char *buf, size_t count, loff_t | |
247 | *ppos ); | |
248 | static void start_print( int device ); | |
7d12e780 | 249 | static irqreturn_t slm_interrupt(int irc, void *data); |
1da177e4 LT |
250 | static void slm_test_ready( unsigned long dummy ); |
251 | static void set_dma_addr( unsigned long paddr ); | |
252 | static unsigned long get_dma_addr( void ); | |
253 | static ssize_t slm_write( struct file *file, const char *buf, size_t count, | |
254 | loff_t *ppos ); | |
255 | static int slm_ioctl( struct inode *inode, struct file *file, unsigned int | |
256 | cmd, unsigned long arg ); | |
257 | static int slm_open( struct inode *inode, struct file *file ); | |
258 | static int slm_release( struct inode *inode, struct file *file ); | |
259 | static int slm_req_sense( int device ); | |
260 | static int slm_mode_sense( int device, char *buffer, int abs_flag ); | |
261 | #if 0 | |
262 | static int slm_mode_select( int device, char *buffer, int len, int | |
263 | default_flag ); | |
264 | #endif | |
265 | static int slm_get_pagesize( int device, int *w, int *h ); | |
266 | ||
267 | /************************* End of Prototypes **************************/ | |
268 | ||
269 | ||
8d06afab | 270 | static DEFINE_TIMER(slm_timer, slm_test_ready, 0, 0); |
1da177e4 LT |
271 | |
272 | static struct file_operations slm_fops = { | |
273 | .owner = THIS_MODULE, | |
274 | .read = slm_read, | |
275 | .write = slm_write, | |
276 | .ioctl = slm_ioctl, | |
277 | .open = slm_open, | |
278 | .release = slm_release, | |
279 | }; | |
280 | ||
281 | ||
282 | /* ---------------------------------------------------------------------- */ | |
283 | /* Status Functions */ | |
284 | ||
285 | ||
286 | static char *slm_errstr( int stat ) | |
287 | ||
288 | { char *p; | |
289 | static char str[22]; | |
290 | ||
291 | stat &= 0x1f; | |
292 | if (stat >= 0 && stat < N_ERRORS && (p = SLMErrors[stat])) | |
293 | return( p ); | |
294 | sprintf( str, "unknown status 0x%02x", stat ); | |
295 | return( str ); | |
296 | } | |
297 | ||
298 | ||
299 | static int slm_getstats( char *buffer, int device ) | |
300 | ||
301 | { int len = 0, stat, i, w, h; | |
302 | unsigned char buf[256]; | |
303 | ||
304 | stat = slm_mode_sense( device, buf, 0 ); | |
305 | if (IS_REAL_ERROR(stat)) | |
306 | return( -EIO ); | |
307 | ||
308 | #define SHORTDATA(i) ((buf[i] << 8) | buf[i+1]) | |
309 | #define BOOLDATA(i,mask) ((buf[i] & mask) ? "on" : "off") | |
310 | ||
311 | w = SHORTDATA( 3 ); | |
312 | h = SHORTDATA( 1 ); | |
313 | ||
314 | len += sprintf( buffer+len, "Status\t\t%s\n", | |
315 | slm_errstr( stat ) ); | |
316 | len += sprintf( buffer+len, "Page Size\t%dx%d", | |
317 | w, h ); | |
318 | ||
319 | for( i = 0; i < N_STD_SIZES; ++i ) { | |
320 | if (w == StdPageSize[i].w && h == StdPageSize[i].h) | |
321 | break; | |
322 | } | |
323 | if (i < N_STD_SIZES) | |
324 | len += sprintf( buffer+len, " (%s)", StdPageSize[i].name ); | |
325 | buffer[len++] = '\n'; | |
326 | ||
327 | len += sprintf( buffer+len, "Top/Left Margin\t%d/%d\n", | |
328 | SHORTDATA( 5 ), SHORTDATA( 7 ) ); | |
329 | len += sprintf( buffer+len, "Manual Feed\t%s\n", | |
330 | BOOLDATA( 9, 0x01 ) ); | |
331 | len += sprintf( buffer+len, "Input Select\t%d\n", | |
332 | (buf[9] >> 1) & 7 ); | |
333 | len += sprintf( buffer+len, "Auto Select\t%s\n", | |
334 | BOOLDATA( 9, 0x10 ) ); | |
335 | len += sprintf( buffer+len, "Prefeed Paper\t%s\n", | |
336 | BOOLDATA( 9, 0x20 ) ); | |
337 | len += sprintf( buffer+len, "Thick Pixels\t%s\n", | |
338 | BOOLDATA( 9, 0x40 ) ); | |
339 | len += sprintf( buffer+len, "H/V Resol.\t%d/%d dpi\n", | |
340 | SHORTDATA( 12 ), SHORTDATA( 10 ) ); | |
341 | len += sprintf( buffer+len, "System Timeout\t%d\n", | |
342 | buf[14] ); | |
343 | len += sprintf( buffer+len, "Scan Time\t%d\n", | |
344 | SHORTDATA( 15 ) ); | |
345 | len += sprintf( buffer+len, "Page Count\t%d\n", | |
346 | SHORTDATA( 17 ) ); | |
347 | len += sprintf( buffer+len, "In/Out Cap.\t%d/%d\n", | |
348 | SHORTDATA( 19 ), SHORTDATA( 21 ) ); | |
349 | len += sprintf( buffer+len, "Stagger Output\t%s\n", | |
350 | BOOLDATA( 23, 0x01 ) ); | |
351 | len += sprintf( buffer+len, "Output Select\t%d\n", | |
352 | (buf[23] >> 1) & 7 ); | |
353 | len += sprintf( buffer+len, "Duplex Print\t%s\n", | |
354 | BOOLDATA( 23, 0x10 ) ); | |
355 | len += sprintf( buffer+len, "Color Sep.\t%s\n", | |
356 | BOOLDATA( 23, 0x20 ) ); | |
357 | ||
358 | return( len ); | |
359 | } | |
360 | ||
361 | ||
362 | static ssize_t slm_read( struct file *file, char *buf, size_t count, | |
363 | loff_t *ppos ) | |
364 | ||
365 | { | |
366 | struct inode *node = file->f_dentry->d_inode; | |
367 | unsigned long page; | |
368 | int length; | |
369 | int end; | |
370 | ||
1da177e4 LT |
371 | if (!(page = __get_free_page( GFP_KERNEL ))) |
372 | return( -ENOMEM ); | |
373 | ||
374 | length = slm_getstats( (char *)page, iminor(node) ); | |
375 | if (length < 0) { | |
376 | count = length; | |
377 | goto out; | |
378 | } | |
379 | if (file->f_pos >= length) { | |
380 | count = 0; | |
381 | goto out; | |
382 | } | |
383 | if (count + file->f_pos > length) | |
384 | count = length - file->f_pos; | |
385 | end = count + file->f_pos; | |
386 | if (copy_to_user(buf, (char *)page + file->f_pos, count)) { | |
387 | count = -EFAULT; | |
388 | goto out; | |
389 | } | |
390 | file->f_pos = end; | |
391 | out: free_page( page ); | |
392 | return( count ); | |
393 | } | |
394 | ||
395 | ||
396 | /* ---------------------------------------------------------------------- */ | |
397 | /* Printing */ | |
398 | ||
399 | ||
400 | static void start_print( int device ) | |
401 | ||
402 | { struct slm *sip = &slm_info[device]; | |
403 | unsigned char *cmd; | |
404 | unsigned long paddr; | |
405 | int i; | |
406 | ||
407 | stdma_lock( slm_interrupt, NULL ); | |
408 | ||
409 | CMDSET_TARG_LUN( slmprint_cmd, sip->target, sip->lun ); | |
410 | cmd = slmprint_cmd; | |
411 | paddr = virt_to_phys( SLMBuffer ); | |
412 | dma_cache_maintenance( paddr, virt_to_phys(BufferP)-paddr, 1 ); | |
413 | DISABLE_IRQ(); | |
414 | ||
415 | /* Low on A1 */ | |
416 | dma_wd.dma_mode_status = 0x88; | |
417 | MFPDELAY(); | |
418 | ||
419 | /* send the command bytes except the last */ | |
420 | for( i = 0; i < 5; ++i ) { | |
421 | DMA_LONG_WRITE( *cmd++, 0x8a ); | |
422 | udelay(20); | |
423 | if (!acsi_wait_for_IRQ( HZ/2 )) { | |
424 | SLMError = 1; | |
425 | return; /* timeout */ | |
426 | } | |
427 | } | |
428 | /* last command byte */ | |
429 | DMA_LONG_WRITE( *cmd++, 0x82 ); | |
430 | MFPDELAY(); | |
431 | /* set DMA address */ | |
432 | set_dma_addr( paddr ); | |
433 | /* program DMA for write and select sector counter reg */ | |
434 | dma_wd.dma_mode_status = 0x192; | |
435 | MFPDELAY(); | |
436 | /* program for 255*512 bytes and start DMA */ | |
437 | DMA_LONG_WRITE( SLM_DMA_AMOUNT, 0x112 ); | |
438 | ||
439 | #ifndef SLM_CONT_CNT_REPROG | |
440 | SLMCurAddr = paddr; | |
441 | SLMEndAddr = paddr + SLMSliceSize + SLM_DMA_INT_OFFSET; | |
442 | #endif | |
443 | START_TIMER( DMA_STARTUP_TIME + DMA_TIME_FOR( SLMSliceSize )); | |
444 | #if !defined(SLM_CONT_CNT_REPROG) && defined(DEBUG) | |
445 | printk( "SLM: CurAddr=%#lx EndAddr=%#lx timer=%ld\n", | |
446 | SLMCurAddr, SLMEndAddr, DMA_TIME_FOR( SLMSliceSize ) ); | |
447 | #endif | |
448 | ||
449 | ENABLE_IRQ(); | |
450 | } | |
451 | ||
452 | ||
453 | /* Only called when an error happened or at the end of a page */ | |
454 | ||
7d12e780 | 455 | static irqreturn_t slm_interrupt(int irc, void *data) |
1da177e4 LT |
456 | |
457 | { unsigned long addr; | |
458 | int stat; | |
459 | ||
460 | STOP_TIMER(); | |
461 | addr = get_dma_addr(); | |
462 | stat = acsi_getstatus(); | |
463 | SLMError = (stat < 0) ? SLMSTAT_ACSITO : | |
464 | (addr < virt_to_phys(BufferP)) ? SLMSTAT_NOTALL : | |
465 | stat; | |
466 | ||
467 | dma_wd.dma_mode_status = 0x80; | |
468 | MFPDELAY(); | |
469 | #ifdef DEBUG | |
470 | printk( "SLM: interrupt, addr=%#lx, error=%d\n", addr, SLMError ); | |
471 | #endif | |
472 | ||
473 | wake_up( &print_wait ); | |
474 | stdma_release(); | |
475 | ENABLE_IRQ(); | |
476 | return IRQ_HANDLED; | |
477 | } | |
478 | ||
479 | ||
480 | static void slm_test_ready( unsigned long dummy ) | |
481 | ||
482 | { | |
483 | #ifdef SLM_CONT_CNT_REPROG | |
484 | /* program for 255*512 bytes again */ | |
485 | dma_wd.fdc_acces_seccount = SLM_DMA_AMOUNT; | |
486 | START_TIMER( DMA_TIME_FOR(0) ); | |
487 | #ifdef DEBUG | |
488 | printk( "SLM: reprogramming timer for %d jiffies, addr=%#lx\n", | |
489 | DMA_TIME_FOR(0), get_dma_addr() ); | |
490 | #endif | |
491 | ||
492 | #else /* !SLM_CONT_CNT_REPROG */ | |
493 | ||
494 | unsigned long flags, addr; | |
495 | int d, ti; | |
496 | #ifdef DEBUG | |
497 | struct timeval start_tm, end_tm; | |
498 | int did_wait = 0; | |
499 | #endif | |
500 | ||
501 | local_irq_save(flags); | |
502 | ||
503 | addr = get_dma_addr(); | |
504 | if ((d = SLMEndAddr - addr) > 0) { | |
505 | local_irq_restore(flags); | |
506 | ||
507 | /* slice not yet finished, decide whether to start another timer or to | |
508 | * busy-wait */ | |
509 | ti = DMA_TIME_FOR( d ); | |
510 | if (ti > 0) { | |
511 | #ifdef DEBUG | |
512 | printk( "SLM: reprogramming timer for %d jiffies, rest %d bytes\n", | |
513 | ti, d ); | |
514 | #endif | |
515 | START_TIMER( ti ); | |
516 | return; | |
517 | } | |
518 | /* wait for desired end address to be reached */ | |
519 | #ifdef DEBUG | |
520 | do_gettimeofday( &start_tm ); | |
521 | did_wait = 1; | |
522 | #endif | |
523 | local_irq_disable(); | |
524 | while( get_dma_addr() < SLMEndAddr ) | |
525 | barrier(); | |
526 | } | |
527 | ||
528 | /* slice finished, start next one */ | |
529 | SLMCurAddr += SLMSliceSize; | |
530 | ||
531 | #ifdef SLM_CONTINUOUS_DMA | |
532 | /* program for 255*512 bytes again */ | |
533 | dma_wd.fdc_acces_seccount = SLM_DMA_AMOUNT; | |
534 | #else | |
535 | /* set DMA address; | |
536 | * add 2 bytes for the ones in the SLM controller FIFO! */ | |
537 | set_dma_addr( SLMCurAddr + 2 ); | |
538 | /* toggle DMA to write and select sector counter reg */ | |
539 | dma_wd.dma_mode_status = 0x92; | |
540 | MFPDELAY(); | |
541 | dma_wd.dma_mode_status = 0x192; | |
542 | MFPDELAY(); | |
543 | /* program for 255*512 bytes and start DMA */ | |
544 | DMA_LONG_WRITE( SLM_DMA_AMOUNT, 0x112 ); | |
545 | #endif | |
546 | ||
547 | local_irq_restore(flags); | |
548 | ||
549 | #ifdef DEBUG | |
550 | if (did_wait) { | |
551 | int ms; | |
552 | do_gettimeofday( &end_tm ); | |
553 | ms = (end_tm.tv_sec*1000000+end_tm.tv_usec) - | |
554 | (start_tm.tv_sec*1000000+start_tm.tv_usec); | |
555 | printk( "SLM: did %ld.%ld ms busy waiting for %d bytes\n", | |
556 | ms/1000, ms%1000, d ); | |
557 | } | |
558 | else | |
559 | printk( "SLM: didn't wait (!)\n" ); | |
560 | #endif | |
561 | ||
562 | if ((unsigned char *)PTOV( SLMCurAddr + SLMSliceSize ) >= BufferP) { | |
563 | /* will be last slice, no timer necessary */ | |
564 | #ifdef DEBUG | |
565 | printk( "SLM: CurAddr=%#lx EndAddr=%#lx last slice -> no timer\n", | |
566 | SLMCurAddr, SLMEndAddr ); | |
567 | #endif | |
568 | } | |
569 | else { | |
570 | /* not last slice */ | |
571 | SLMEndAddr = SLMCurAddr + SLMSliceSize + SLM_DMA_INT_OFFSET; | |
572 | START_TIMER( DMA_TIME_FOR( SLMSliceSize )); | |
573 | #ifdef DEBUG | |
574 | printk( "SLM: CurAddr=%#lx EndAddr=%#lx timer=%ld\n", | |
575 | SLMCurAddr, SLMEndAddr, DMA_TIME_FOR( SLMSliceSize ) ); | |
576 | #endif | |
577 | } | |
578 | #endif /* SLM_CONT_CNT_REPROG */ | |
579 | } | |
580 | ||
581 | ||
582 | static void set_dma_addr( unsigned long paddr ) | |
583 | ||
584 | { unsigned long flags; | |
585 | ||
586 | local_irq_save(flags); | |
587 | dma_wd.dma_lo = (unsigned char)paddr; | |
588 | paddr >>= 8; | |
589 | MFPDELAY(); | |
590 | dma_wd.dma_md = (unsigned char)paddr; | |
591 | paddr >>= 8; | |
592 | MFPDELAY(); | |
593 | if (ATARIHW_PRESENT( EXTD_DMA )) | |
594 | st_dma_ext_dmahi = (unsigned short)paddr; | |
595 | else | |
596 | dma_wd.dma_hi = (unsigned char)paddr; | |
597 | MFPDELAY(); | |
598 | local_irq_restore(flags); | |
599 | } | |
600 | ||
601 | ||
602 | static unsigned long get_dma_addr( void ) | |
603 | ||
604 | { unsigned long addr; | |
605 | ||
606 | addr = dma_wd.dma_lo & 0xff; | |
607 | MFPDELAY(); | |
608 | addr |= (dma_wd.dma_md & 0xff) << 8; | |
609 | MFPDELAY(); | |
610 | addr |= (dma_wd.dma_hi & 0xff) << 16; | |
611 | MFPDELAY(); | |
612 | ||
613 | return( addr ); | |
614 | } | |
615 | ||
616 | ||
617 | static ssize_t slm_write( struct file *file, const char *buf, size_t count, | |
618 | loff_t *ppos ) | |
619 | ||
620 | { | |
621 | struct inode *node = file->f_dentry->d_inode; | |
622 | int device = iminor(node); | |
623 | int n, filled, w, h; | |
624 | ||
625 | while( SLMState == PRINTING || | |
626 | (SLMState == FILLING && SLMBufOwner != device) ) { | |
627 | interruptible_sleep_on( &slm_wait ); | |
628 | if (signal_pending(current)) | |
629 | return( -ERESTARTSYS ); | |
630 | } | |
631 | if (SLMState == IDLE) { | |
632 | /* first data of page: get current page size */ | |
633 | if (slm_get_pagesize( device, &w, &h )) | |
634 | return( -EIO ); | |
635 | BufferSize = w*h/8; | |
636 | if (BufferSize > SLM_BUFFER_SIZE) | |
637 | return( -ENOMEM ); | |
638 | ||
639 | SLMState = FILLING; | |
640 | SLMBufOwner = device; | |
641 | } | |
642 | ||
643 | n = count; | |
644 | filled = BufferP - SLMBuffer; | |
645 | if (filled + n > BufferSize) | |
646 | n = BufferSize - filled; | |
647 | ||
648 | if (copy_from_user(BufferP, buf, n)) | |
649 | return -EFAULT; | |
650 | BufferP += n; | |
651 | filled += n; | |
652 | ||
653 | if (filled == BufferSize) { | |
654 | /* Check the paper size again! The user may have switched it in the | |
655 | * time between starting the data and finishing them. Would end up in | |
656 | * a trashy page... */ | |
657 | if (slm_get_pagesize( device, &w, &h )) | |
658 | return( -EIO ); | |
659 | if (BufferSize != w*h/8) { | |
660 | printk( KERN_NOTICE "slm%d: page size changed while printing\n", | |
661 | device ); | |
662 | return( -EAGAIN ); | |
663 | } | |
664 | ||
665 | SLMState = PRINTING; | |
666 | /* choose a slice size that is a multiple of the line size */ | |
667 | #ifndef SLM_CONT_CNT_REPROG | |
668 | SLMSliceSize = SLM_SLICE_SIZE(w); | |
669 | #endif | |
670 | ||
671 | start_print( device ); | |
672 | sleep_on( &print_wait ); | |
673 | if (SLMError && IS_REAL_ERROR(SLMError)) { | |
674 | printk( KERN_ERR "slm%d: %s\n", device, slm_errstr(SLMError) ); | |
675 | n = -EIO; | |
676 | } | |
677 | ||
678 | SLMState = IDLE; | |
679 | BufferP = SLMBuffer; | |
680 | wake_up_interruptible( &slm_wait ); | |
681 | } | |
682 | ||
683 | return( n ); | |
684 | } | |
685 | ||
686 | ||
687 | /* ---------------------------------------------------------------------- */ | |
688 | /* ioctl Functions */ | |
689 | ||
690 | ||
691 | static int slm_ioctl( struct inode *inode, struct file *file, | |
692 | unsigned int cmd, unsigned long arg ) | |
693 | ||
694 | { int device = iminor(inode), err; | |
695 | ||
696 | /* I can think of setting: | |
697 | * - manual feed | |
698 | * - paper format | |
699 | * - copy count | |
700 | * - ... | |
701 | * but haven't implemented that yet :-) | |
702 | * BTW, has anybody better docs about the MODE SENSE/MODE SELECT data? | |
703 | */ | |
704 | switch( cmd ) { | |
705 | ||
706 | case SLMIORESET: /* reset buffer, i.e. empty the buffer */ | |
707 | if (!(file->f_mode & 2)) | |
708 | return( -EINVAL ); | |
709 | if (SLMState == PRINTING) | |
710 | return( -EBUSY ); | |
711 | SLMState = IDLE; | |
712 | BufferP = SLMBuffer; | |
713 | wake_up_interruptible( &slm_wait ); | |
714 | return( 0 ); | |
715 | ||
716 | case SLMIOGSTAT: { /* get status */ | |
717 | int stat; | |
718 | char *str; | |
719 | ||
720 | stat = slm_req_sense( device ); | |
721 | if (arg) { | |
722 | str = slm_errstr( stat ); | |
723 | if (put_user(stat, | |
724 | (long *)&((struct SLM_status *)arg)->stat)) | |
725 | return -EFAULT; | |
726 | if (copy_to_user( ((struct SLM_status *)arg)->str, str, | |
727 | strlen(str) + 1)) | |
728 | return -EFAULT; | |
729 | } | |
730 | return( stat ); | |
731 | } | |
732 | ||
733 | case SLMIOGPSIZE: { /* get paper size */ | |
734 | int w, h; | |
735 | ||
736 | if ((err = slm_get_pagesize( device, &w, &h ))) return( err ); | |
737 | ||
738 | if (put_user(w, (long *)&((struct SLM_paper_size *)arg)->width)) | |
739 | return -EFAULT; | |
740 | if (put_user(h, (long *)&((struct SLM_paper_size *)arg)->height)) | |
741 | return -EFAULT; | |
742 | return( 0 ); | |
743 | } | |
744 | ||
745 | case SLMIOGMFEED: /* get manual feed */ | |
746 | return( -EINVAL ); | |
747 | ||
748 | case SLMIOSPSIZE: /* set paper size */ | |
749 | return( -EINVAL ); | |
750 | ||
751 | case SLMIOSMFEED: /* set manual feed */ | |
752 | return( -EINVAL ); | |
753 | ||
754 | } | |
755 | return( -EINVAL ); | |
756 | } | |
757 | ||
758 | ||
759 | /* ---------------------------------------------------------------------- */ | |
760 | /* Opening and Closing */ | |
761 | ||
762 | ||
763 | static int slm_open( struct inode *inode, struct file *file ) | |
764 | ||
765 | { int device; | |
766 | struct slm *sip; | |
767 | ||
768 | device = iminor(inode); | |
769 | if (device >= N_SLM_Printers) | |
770 | return( -ENXIO ); | |
771 | sip = &slm_info[device]; | |
772 | ||
773 | if (file->f_mode & 2) { | |
774 | /* open for writing is exclusive */ | |
775 | if ( !atomic_dec_and_test(&sip->wr_ok) ) { | |
776 | atomic_inc(&sip->wr_ok); | |
777 | return( -EBUSY ); | |
778 | } | |
779 | } | |
780 | if (file->f_mode & 1) { | |
781 | /* open for reading is exclusive */ | |
782 | if ( !atomic_dec_and_test(&sip->rd_ok) ) { | |
783 | atomic_inc(&sip->rd_ok); | |
784 | return( -EBUSY ); | |
785 | } | |
786 | } | |
787 | ||
788 | return( 0 ); | |
789 | } | |
790 | ||
791 | ||
792 | static int slm_release( struct inode *inode, struct file *file ) | |
793 | ||
794 | { int device; | |
795 | struct slm *sip; | |
796 | ||
797 | device = iminor(inode); | |
798 | sip = &slm_info[device]; | |
799 | ||
800 | if (file->f_mode & 2) | |
801 | atomic_inc( &sip->wr_ok ); | |
802 | if (file->f_mode & 1) | |
803 | atomic_inc( &sip->rd_ok ); | |
804 | ||
805 | return( 0 ); | |
806 | } | |
807 | ||
808 | ||
809 | /* ---------------------------------------------------------------------- */ | |
810 | /* ACSI Primitives for the SLM */ | |
811 | ||
812 | ||
813 | static int slm_req_sense( int device ) | |
814 | ||
815 | { int stat, rv; | |
816 | struct slm *sip = &slm_info[device]; | |
817 | ||
818 | stdma_lock( NULL, NULL ); | |
819 | ||
820 | CMDSET_TARG_LUN( slmreqsense_cmd, sip->target, sip->lun ); | |
821 | if (!acsicmd_nodma( slmreqsense_cmd, 0 ) || | |
822 | (stat = acsi_getstatus()) < 0) | |
823 | rv = SLMSTAT_ACSITO; | |
824 | else | |
825 | rv = stat & 0x1f; | |
826 | ||
827 | ENABLE_IRQ(); | |
828 | stdma_release(); | |
829 | return( rv ); | |
830 | } | |
831 | ||
832 | ||
833 | static int slm_mode_sense( int device, char *buffer, int abs_flag ) | |
834 | ||
835 | { unsigned char stat, len; | |
836 | int rv = 0; | |
837 | struct slm *sip = &slm_info[device]; | |
838 | ||
839 | stdma_lock( NULL, NULL ); | |
840 | ||
841 | CMDSET_TARG_LUN( slmmsense_cmd, sip->target, sip->lun ); | |
842 | slmmsense_cmd[5] = abs_flag ? 0x80 : 0; | |
843 | if (!acsicmd_nodma( slmmsense_cmd, 0 )) { | |
844 | rv = SLMSTAT_ACSITO; | |
845 | goto the_end; | |
846 | } | |
847 | ||
848 | if (!acsi_extstatus( &stat, 1 )) { | |
849 | acsi_end_extstatus(); | |
850 | rv = SLMSTAT_ACSITO; | |
851 | goto the_end; | |
852 | } | |
853 | ||
854 | if (!acsi_extstatus( &len, 1 )) { | |
855 | acsi_end_extstatus(); | |
856 | rv = SLMSTAT_ACSITO; | |
857 | goto the_end; | |
858 | } | |
859 | buffer[0] = len; | |
860 | if (!acsi_extstatus( buffer+1, len )) { | |
861 | acsi_end_extstatus(); | |
862 | rv = SLMSTAT_ACSITO; | |
863 | goto the_end; | |
864 | } | |
865 | ||
866 | acsi_end_extstatus(); | |
867 | rv = stat & 0x1f; | |
868 | ||
869 | the_end: | |
870 | ENABLE_IRQ(); | |
871 | stdma_release(); | |
872 | return( rv ); | |
873 | } | |
874 | ||
875 | ||
876 | #if 0 | |
877 | /* currently unused */ | |
878 | static int slm_mode_select( int device, char *buffer, int len, | |
879 | int default_flag ) | |
880 | ||
881 | { int stat, rv; | |
882 | struct slm *sip = &slm_info[device]; | |
883 | ||
884 | stdma_lock( NULL, NULL ); | |
885 | ||
886 | CMDSET_TARG_LUN( slmmselect_cmd, sip->target, sip->lun ); | |
887 | slmmselect_cmd[5] = default_flag ? 0x80 : 0; | |
888 | if (!acsicmd_nodma( slmmselect_cmd, 0 )) { | |
889 | rv = SLMSTAT_ACSITO; | |
890 | goto the_end; | |
891 | } | |
892 | ||
893 | if (!default_flag) { | |
894 | unsigned char c = len; | |
895 | if (!acsi_extcmd( &c, 1 )) { | |
896 | rv = SLMSTAT_ACSITO; | |
897 | goto the_end; | |
898 | } | |
899 | if (!acsi_extcmd( buffer, len )) { | |
900 | rv = SLMSTAT_ACSITO; | |
901 | goto the_end; | |
902 | } | |
903 | } | |
904 | ||
905 | stat = acsi_getstatus(); | |
906 | rv = (stat < 0 ? SLMSTAT_ACSITO : stat); | |
907 | ||
908 | the_end: | |
909 | ENABLE_IRQ(); | |
910 | stdma_release(); | |
911 | return( rv ); | |
912 | } | |
913 | #endif | |
914 | ||
915 | ||
916 | static int slm_get_pagesize( int device, int *w, int *h ) | |
917 | ||
918 | { char buf[256]; | |
919 | int stat; | |
920 | ||
921 | stat = slm_mode_sense( device, buf, 0 ); | |
922 | ENABLE_IRQ(); | |
923 | stdma_release(); | |
924 | ||
925 | if (stat != SLMSTAT_OK) | |
926 | return( -EIO ); | |
927 | ||
928 | *w = (buf[3] << 8) | buf[4]; | |
929 | *h = (buf[1] << 8) | buf[2]; | |
930 | return( 0 ); | |
931 | } | |
932 | ||
933 | ||
934 | /* ---------------------------------------------------------------------- */ | |
935 | /* Initialization */ | |
936 | ||
937 | ||
938 | int attach_slm( int target, int lun ) | |
939 | ||
940 | { static int did_register; | |
941 | int len; | |
942 | ||
943 | if (N_SLM_Printers >= MAX_SLM) { | |
944 | printk( KERN_WARNING "Too much SLMs\n" ); | |
945 | return( 0 ); | |
946 | } | |
947 | ||
948 | /* do an INQUIRY */ | |
949 | udelay(100); | |
950 | CMDSET_TARG_LUN( slminquiry_cmd, target, lun ); | |
951 | if (!acsicmd_nodma( slminquiry_cmd, 0 )) { | |
952 | inq_timeout: | |
953 | printk( KERN_ERR "SLM inquiry command timed out.\n" ); | |
954 | inq_fail: | |
955 | acsi_end_extstatus(); | |
956 | return( 0 ); | |
957 | } | |
958 | /* read status and header of return data */ | |
959 | if (!acsi_extstatus( SLMBuffer, 6 )) | |
960 | goto inq_timeout; | |
961 | ||
962 | if (SLMBuffer[1] != 2) { /* device type == printer? */ | |
963 | printk( KERN_ERR "SLM inquiry returned device type != printer\n" ); | |
964 | goto inq_fail; | |
965 | } | |
966 | len = SLMBuffer[5]; | |
967 | ||
968 | /* read id string */ | |
969 | if (!acsi_extstatus( SLMBuffer, len )) | |
970 | goto inq_timeout; | |
971 | acsi_end_extstatus(); | |
972 | SLMBuffer[len] = 0; | |
973 | ||
974 | if (!did_register) { | |
975 | did_register = 1; | |
976 | } | |
977 | ||
978 | slm_info[N_SLM_Printers].target = target; | |
979 | slm_info[N_SLM_Printers].lun = lun; | |
980 | atomic_set(&slm_info[N_SLM_Printers].wr_ok, 1 ); | |
981 | atomic_set(&slm_info[N_SLM_Printers].rd_ok, 1 ); | |
982 | ||
983 | printk( KERN_INFO " Printer: %s\n", SLMBuffer ); | |
984 | printk( KERN_INFO "Detected slm%d at id %d lun %d\n", | |
985 | N_SLM_Printers, target, lun ); | |
986 | N_SLM_Printers++; | |
987 | return( 1 ); | |
988 | } | |
989 | ||
990 | int slm_init( void ) | |
991 | ||
992 | { | |
993 | int i; | |
994 | if (register_chrdev( ACSI_MAJOR, "slm", &slm_fops )) { | |
995 | printk( KERN_ERR "Unable to get major %d for ACSI SLM\n", ACSI_MAJOR ); | |
996 | return -EBUSY; | |
997 | } | |
998 | ||
999 | if (!(SLMBuffer = atari_stram_alloc( SLM_BUFFER_SIZE, "SLM" ))) { | |
1000 | printk( KERN_ERR "Unable to get SLM ST-Ram buffer.\n" ); | |
1001 | unregister_chrdev( ACSI_MAJOR, "slm" ); | |
1002 | return -ENOMEM; | |
1003 | } | |
1004 | BufferP = SLMBuffer; | |
1005 | SLMState = IDLE; | |
1006 | ||
1da177e4 LT |
1007 | return 0; |
1008 | } | |
1009 | ||
1010 | #ifdef MODULE | |
1011 | ||
1012 | /* from acsi.c */ | |
1013 | void acsi_attach_SLMs( int (*attach_func)( int, int ) ); | |
1014 | ||
1015 | int init_module(void) | |
1016 | { | |
1017 | int err; | |
1018 | ||
1019 | if ((err = slm_init())) | |
1020 | return( err ); | |
1021 | /* This calls attach_slm() for every target/lun where acsi.c detected a | |
1022 | * printer */ | |
1023 | acsi_attach_SLMs( attach_slm ); | |
1024 | return( 0 ); | |
1025 | } | |
1026 | ||
1027 | void cleanup_module(void) | |
1028 | { | |
1da177e4 LT |
1029 | if (unregister_chrdev( ACSI_MAJOR, "slm" ) != 0) |
1030 | printk( KERN_ERR "acsi_slm: cleanup_module failed\n"); | |
1031 | atari_stram_free( SLMBuffer ); | |
1032 | } | |
1033 | #endif |