Commit | Line | Data |
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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> | |
68 | #include <linux/devfs_fs_kernel.h> | |
69 | #include <linux/smp_lock.h> | |
70 | ||
71 | #include <asm/pgtable.h> | |
72 | #include <asm/system.h> | |
73 | #include <asm/uaccess.h> | |
74 | #include <asm/atarihw.h> | |
75 | #include <asm/atariints.h> | |
76 | #include <asm/atari_acsi.h> | |
77 | #include <asm/atari_stdma.h> | |
78 | #include <asm/atari_stram.h> | |
79 | #include <asm/atari_SLM.h> | |
80 | ||
81 | ||
82 | #undef DEBUG | |
83 | ||
84 | /* Define this if the page data are continuous in physical memory. That | |
85 | * requires less reprogramming of the ST-DMA */ | |
86 | #define SLM_CONTINUOUS_DMA | |
87 | ||
88 | /* Use continuous reprogramming of the ST-DMA counter register. This is | |
89 | * --strictly speaking-- not allowed, Atari recommends not to look at the | |
90 | * counter register while a DMA is going on. But I don't know if that applies | |
91 | * only for reading the register, or also writing to it. Writing only works | |
92 | * fine for me... The advantage is that the timing becomes absolutely | |
93 | * uncritical: Just update each, say 200ms, the counter reg to its maximum, | |
94 | * and the DMA will work until the status byte interrupt occurs. | |
95 | */ | |
96 | #define SLM_CONT_CNT_REPROG | |
97 | ||
98 | #define CMDSET_TARG_LUN(cmd,targ,lun) \ | |
99 | do { \ | |
100 | cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \ | |
101 | cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \ | |
102 | } while(0) | |
103 | ||
104 | #define START_TIMER(to) mod_timer(&slm_timer, jiffies + (to)) | |
105 | #define STOP_TIMER() del_timer(&slm_timer) | |
106 | ||
107 | ||
108 | static char slmreqsense_cmd[6] = { 0x03, 0, 0, 0, 0, 0 }; | |
109 | static char slmprint_cmd[6] = { 0x0a, 0, 0, 0, 0, 0 }; | |
110 | static char slminquiry_cmd[6] = { 0x12, 0, 0, 0, 0, 0x80 }; | |
111 | static char slmmsense_cmd[6] = { 0x1a, 0, 0, 0, 255, 0 }; | |
112 | #if 0 | |
113 | static char slmmselect_cmd[6] = { 0x15, 0, 0, 0, 0, 0 }; | |
114 | #endif | |
115 | ||
116 | ||
117 | #define MAX_SLM 2 | |
118 | ||
119 | static struct slm { | |
120 | unsigned target; /* target number */ | |
121 | unsigned lun; /* LUN in target controller */ | |
122 | atomic_t wr_ok; /* set to 0 if output part busy */ | |
123 | atomic_t rd_ok; /* set to 0 if status part busy */ | |
124 | } slm_info[MAX_SLM]; | |
125 | ||
126 | int N_SLM_Printers = 0; | |
127 | ||
128 | /* printer buffer */ | |
129 | static unsigned char *SLMBuffer; /* start of buffer */ | |
130 | static unsigned char *BufferP; /* current position in buffer */ | |
131 | static int BufferSize; /* length of buffer for page size */ | |
132 | ||
133 | typedef enum { IDLE, FILLING, PRINTING } SLMSTATE; | |
134 | static SLMSTATE SLMState; | |
135 | static int SLMBufOwner; /* SLM# currently using the buffer */ | |
136 | ||
137 | /* DMA variables */ | |
138 | #ifndef SLM_CONT_CNT_REPROG | |
139 | static unsigned long SLMCurAddr; /* current base addr of DMA chunk */ | |
140 | static unsigned long SLMEndAddr; /* expected end addr */ | |
141 | static unsigned long SLMSliceSize; /* size of one DMA chunk */ | |
142 | #endif | |
143 | static int SLMError; | |
144 | ||
145 | /* wait queues */ | |
146 | static DECLARE_WAIT_QUEUE_HEAD(slm_wait); /* waiting for buffer */ | |
147 | static DECLARE_WAIT_QUEUE_HEAD(print_wait); /* waiting for printing finished */ | |
148 | ||
149 | /* status codes */ | |
150 | #define SLMSTAT_OK 0x00 | |
151 | #define SLMSTAT_ORNERY 0x02 | |
152 | #define SLMSTAT_TONER 0x03 | |
153 | #define SLMSTAT_WARMUP 0x04 | |
154 | #define SLMSTAT_PAPER 0x05 | |
155 | #define SLMSTAT_DRUM 0x06 | |
156 | #define SLMSTAT_INJAM 0x07 | |
157 | #define SLMSTAT_THRJAM 0x08 | |
158 | #define SLMSTAT_OUTJAM 0x09 | |
159 | #define SLMSTAT_COVER 0x0a | |
160 | #define SLMSTAT_FUSER 0x0b | |
161 | #define SLMSTAT_IMAGER 0x0c | |
162 | #define SLMSTAT_MOTOR 0x0d | |
163 | #define SLMSTAT_VIDEO 0x0e | |
164 | #define SLMSTAT_SYSTO 0x10 | |
165 | #define SLMSTAT_OPCODE 0x12 | |
166 | #define SLMSTAT_DEVNUM 0x15 | |
167 | #define SLMSTAT_PARAM 0x1a | |
168 | #define SLMSTAT_ACSITO 0x1b /* driver defined */ | |
169 | #define SLMSTAT_NOTALL 0x1c /* driver defined */ | |
170 | ||
171 | static char *SLMErrors[] = { | |
172 | /* 0x00 */ "OK and ready", | |
173 | /* 0x01 */ NULL, | |
174 | /* 0x02 */ "ornery printer", | |
175 | /* 0x03 */ "toner empty", | |
176 | /* 0x04 */ "warming up", | |
177 | /* 0x05 */ "paper empty", | |
178 | /* 0x06 */ "drum empty", | |
179 | /* 0x07 */ "input jam", | |
180 | /* 0x08 */ "through jam", | |
181 | /* 0x09 */ "output jam", | |
182 | /* 0x0a */ "cover open", | |
183 | /* 0x0b */ "fuser malfunction", | |
184 | /* 0x0c */ "imager malfunction", | |
185 | /* 0x0d */ "motor malfunction", | |
186 | /* 0x0e */ "video malfunction", | |
187 | /* 0x0f */ NULL, | |
188 | /* 0x10 */ "printer system timeout", | |
189 | /* 0x11 */ NULL, | |
190 | /* 0x12 */ "invalid operation code", | |
191 | /* 0x13 */ NULL, | |
192 | /* 0x14 */ NULL, | |
193 | /* 0x15 */ "invalid device number", | |
194 | /* 0x16 */ NULL, | |
195 | /* 0x17 */ NULL, | |
196 | /* 0x18 */ NULL, | |
197 | /* 0x19 */ NULL, | |
198 | /* 0x1a */ "invalid parameter list", | |
199 | /* 0x1b */ "ACSI timeout", | |
200 | /* 0x1c */ "not all printed" | |
201 | }; | |
202 | ||
203 | #define N_ERRORS (sizeof(SLMErrors)/sizeof(*SLMErrors)) | |
204 | ||
205 | /* real (driver caused) error? */ | |
206 | #define IS_REAL_ERROR(x) (x > 0x10) | |
207 | ||
208 | ||
209 | static struct { | |
210 | char *name; | |
211 | int w, h; | |
212 | } StdPageSize[] = { | |
213 | { "Letter", 2400, 3180 }, | |
214 | { "Legal", 2400, 4080 }, | |
215 | { "A4", 2336, 3386 }, | |
216 | { "B5", 2016, 2914 } | |
217 | }; | |
218 | ||
219 | #define N_STD_SIZES (sizeof(StdPageSize)/sizeof(*StdPageSize)) | |
220 | ||
221 | #define SLM_BUFFER_SIZE (2336*3386/8) /* A4 for now */ | |
222 | #define SLM_DMA_AMOUNT 255 /* #sectors to program the DMA for */ | |
223 | ||
224 | #ifdef SLM_CONTINUOUS_DMA | |
225 | # define SLM_DMA_INT_OFFSET 0 /* DMA goes until seccnt 0, no offs */ | |
226 | # define SLM_DMA_END_OFFSET 32 /* 32 Byte ST-DMA FIFO */ | |
227 | # define SLM_SLICE_SIZE(w) (255*512) | |
228 | #else | |
229 | # define SLM_DMA_INT_OFFSET 32 /* 32 Byte ST-DMA FIFO */ | |
230 | # define SLM_DMA_END_OFFSET 32 /* 32 Byte ST-DMA FIFO */ | |
231 | # define SLM_SLICE_SIZE(w) ((254*512)/(w/8)*(w/8)) | |
232 | #endif | |
233 | ||
234 | /* calculate the number of jiffies to wait for 'n' bytes */ | |
235 | #ifdef SLM_CONT_CNT_REPROG | |
236 | #define DMA_TIME_FOR(n) 50 | |
237 | #define DMA_STARTUP_TIME 0 | |
238 | #else | |
239 | #define DMA_TIME_FOR(n) (n/1400-1) | |
240 | #define DMA_STARTUP_TIME 650 | |
241 | #endif | |
242 | ||
243 | /***************************** Prototypes *****************************/ | |
244 | ||
245 | static char *slm_errstr( int stat ); | |
246 | static int slm_getstats( char *buffer, int device ); | |
247 | static ssize_t slm_read( struct file* file, char *buf, size_t count, loff_t | |
248 | *ppos ); | |
249 | static void start_print( int device ); | |
250 | static irqreturn_t slm_interrupt(int irc, void *data, struct pt_regs *fp); | |
251 | static void slm_test_ready( unsigned long dummy ); | |
252 | static void set_dma_addr( unsigned long paddr ); | |
253 | static unsigned long get_dma_addr( void ); | |
254 | static ssize_t slm_write( struct file *file, const char *buf, size_t count, | |
255 | loff_t *ppos ); | |
256 | static int slm_ioctl( struct inode *inode, struct file *file, unsigned int | |
257 | cmd, unsigned long arg ); | |
258 | static int slm_open( struct inode *inode, struct file *file ); | |
259 | static int slm_release( struct inode *inode, struct file *file ); | |
260 | static int slm_req_sense( int device ); | |
261 | static int slm_mode_sense( int device, char *buffer, int abs_flag ); | |
262 | #if 0 | |
263 | static int slm_mode_select( int device, char *buffer, int len, int | |
264 | default_flag ); | |
265 | #endif | |
266 | static int slm_get_pagesize( int device, int *w, int *h ); | |
267 | ||
268 | /************************* End of Prototypes **************************/ | |
269 | ||
270 | ||
271 | static struct timer_list slm_timer = TIMER_INITIALIZER(slm_test_ready, 0, 0); | |
272 | ||
273 | static struct file_operations slm_fops = { | |
274 | .owner = THIS_MODULE, | |
275 | .read = slm_read, | |
276 | .write = slm_write, | |
277 | .ioctl = slm_ioctl, | |
278 | .open = slm_open, | |
279 | .release = slm_release, | |
280 | }; | |
281 | ||
282 | ||
283 | /* ---------------------------------------------------------------------- */ | |
284 | /* Status Functions */ | |
285 | ||
286 | ||
287 | static char *slm_errstr( int stat ) | |
288 | ||
289 | { char *p; | |
290 | static char str[22]; | |
291 | ||
292 | stat &= 0x1f; | |
293 | if (stat >= 0 && stat < N_ERRORS && (p = SLMErrors[stat])) | |
294 | return( p ); | |
295 | sprintf( str, "unknown status 0x%02x", stat ); | |
296 | return( str ); | |
297 | } | |
298 | ||
299 | ||
300 | static int slm_getstats( char *buffer, int device ) | |
301 | ||
302 | { int len = 0, stat, i, w, h; | |
303 | unsigned char buf[256]; | |
304 | ||
305 | stat = slm_mode_sense( device, buf, 0 ); | |
306 | if (IS_REAL_ERROR(stat)) | |
307 | return( -EIO ); | |
308 | ||
309 | #define SHORTDATA(i) ((buf[i] << 8) | buf[i+1]) | |
310 | #define BOOLDATA(i,mask) ((buf[i] & mask) ? "on" : "off") | |
311 | ||
312 | w = SHORTDATA( 3 ); | |
313 | h = SHORTDATA( 1 ); | |
314 | ||
315 | len += sprintf( buffer+len, "Status\t\t%s\n", | |
316 | slm_errstr( stat ) ); | |
317 | len += sprintf( buffer+len, "Page Size\t%dx%d", | |
318 | w, h ); | |
319 | ||
320 | for( i = 0; i < N_STD_SIZES; ++i ) { | |
321 | if (w == StdPageSize[i].w && h == StdPageSize[i].h) | |
322 | break; | |
323 | } | |
324 | if (i < N_STD_SIZES) | |
325 | len += sprintf( buffer+len, " (%s)", StdPageSize[i].name ); | |
326 | buffer[len++] = '\n'; | |
327 | ||
328 | len += sprintf( buffer+len, "Top/Left Margin\t%d/%d\n", | |
329 | SHORTDATA( 5 ), SHORTDATA( 7 ) ); | |
330 | len += sprintf( buffer+len, "Manual Feed\t%s\n", | |
331 | BOOLDATA( 9, 0x01 ) ); | |
332 | len += sprintf( buffer+len, "Input Select\t%d\n", | |
333 | (buf[9] >> 1) & 7 ); | |
334 | len += sprintf( buffer+len, "Auto Select\t%s\n", | |
335 | BOOLDATA( 9, 0x10 ) ); | |
336 | len += sprintf( buffer+len, "Prefeed Paper\t%s\n", | |
337 | BOOLDATA( 9, 0x20 ) ); | |
338 | len += sprintf( buffer+len, "Thick Pixels\t%s\n", | |
339 | BOOLDATA( 9, 0x40 ) ); | |
340 | len += sprintf( buffer+len, "H/V Resol.\t%d/%d dpi\n", | |
341 | SHORTDATA( 12 ), SHORTDATA( 10 ) ); | |
342 | len += sprintf( buffer+len, "System Timeout\t%d\n", | |
343 | buf[14] ); | |
344 | len += sprintf( buffer+len, "Scan Time\t%d\n", | |
345 | SHORTDATA( 15 ) ); | |
346 | len += sprintf( buffer+len, "Page Count\t%d\n", | |
347 | SHORTDATA( 17 ) ); | |
348 | len += sprintf( buffer+len, "In/Out Cap.\t%d/%d\n", | |
349 | SHORTDATA( 19 ), SHORTDATA( 21 ) ); | |
350 | len += sprintf( buffer+len, "Stagger Output\t%s\n", | |
351 | BOOLDATA( 23, 0x01 ) ); | |
352 | len += sprintf( buffer+len, "Output Select\t%d\n", | |
353 | (buf[23] >> 1) & 7 ); | |
354 | len += sprintf( buffer+len, "Duplex Print\t%s\n", | |
355 | BOOLDATA( 23, 0x10 ) ); | |
356 | len += sprintf( buffer+len, "Color Sep.\t%s\n", | |
357 | BOOLDATA( 23, 0x20 ) ); | |
358 | ||
359 | return( len ); | |
360 | } | |
361 | ||
362 | ||
363 | static ssize_t slm_read( struct file *file, char *buf, size_t count, | |
364 | loff_t *ppos ) | |
365 | ||
366 | { | |
367 | struct inode *node = file->f_dentry->d_inode; | |
368 | unsigned long page; | |
369 | int length; | |
370 | int end; | |
371 | ||
372 | if (count < 0) | |
373 | return( -EINVAL ); | |
374 | if (!(page = __get_free_page( GFP_KERNEL ))) | |
375 | return( -ENOMEM ); | |
376 | ||
377 | length = slm_getstats( (char *)page, iminor(node) ); | |
378 | if (length < 0) { | |
379 | count = length; | |
380 | goto out; | |
381 | } | |
382 | if (file->f_pos >= length) { | |
383 | count = 0; | |
384 | goto out; | |
385 | } | |
386 | if (count + file->f_pos > length) | |
387 | count = length - file->f_pos; | |
388 | end = count + file->f_pos; | |
389 | if (copy_to_user(buf, (char *)page + file->f_pos, count)) { | |
390 | count = -EFAULT; | |
391 | goto out; | |
392 | } | |
393 | file->f_pos = end; | |
394 | out: free_page( page ); | |
395 | return( count ); | |
396 | } | |
397 | ||
398 | ||
399 | /* ---------------------------------------------------------------------- */ | |
400 | /* Printing */ | |
401 | ||
402 | ||
403 | static void start_print( int device ) | |
404 | ||
405 | { struct slm *sip = &slm_info[device]; | |
406 | unsigned char *cmd; | |
407 | unsigned long paddr; | |
408 | int i; | |
409 | ||
410 | stdma_lock( slm_interrupt, NULL ); | |
411 | ||
412 | CMDSET_TARG_LUN( slmprint_cmd, sip->target, sip->lun ); | |
413 | cmd = slmprint_cmd; | |
414 | paddr = virt_to_phys( SLMBuffer ); | |
415 | dma_cache_maintenance( paddr, virt_to_phys(BufferP)-paddr, 1 ); | |
416 | DISABLE_IRQ(); | |
417 | ||
418 | /* Low on A1 */ | |
419 | dma_wd.dma_mode_status = 0x88; | |
420 | MFPDELAY(); | |
421 | ||
422 | /* send the command bytes except the last */ | |
423 | for( i = 0; i < 5; ++i ) { | |
424 | DMA_LONG_WRITE( *cmd++, 0x8a ); | |
425 | udelay(20); | |
426 | if (!acsi_wait_for_IRQ( HZ/2 )) { | |
427 | SLMError = 1; | |
428 | return; /* timeout */ | |
429 | } | |
430 | } | |
431 | /* last command byte */ | |
432 | DMA_LONG_WRITE( *cmd++, 0x82 ); | |
433 | MFPDELAY(); | |
434 | /* set DMA address */ | |
435 | set_dma_addr( paddr ); | |
436 | /* program DMA for write and select sector counter reg */ | |
437 | dma_wd.dma_mode_status = 0x192; | |
438 | MFPDELAY(); | |
439 | /* program for 255*512 bytes and start DMA */ | |
440 | DMA_LONG_WRITE( SLM_DMA_AMOUNT, 0x112 ); | |
441 | ||
442 | #ifndef SLM_CONT_CNT_REPROG | |
443 | SLMCurAddr = paddr; | |
444 | SLMEndAddr = paddr + SLMSliceSize + SLM_DMA_INT_OFFSET; | |
445 | #endif | |
446 | START_TIMER( DMA_STARTUP_TIME + DMA_TIME_FOR( SLMSliceSize )); | |
447 | #if !defined(SLM_CONT_CNT_REPROG) && defined(DEBUG) | |
448 | printk( "SLM: CurAddr=%#lx EndAddr=%#lx timer=%ld\n", | |
449 | SLMCurAddr, SLMEndAddr, DMA_TIME_FOR( SLMSliceSize ) ); | |
450 | #endif | |
451 | ||
452 | ENABLE_IRQ(); | |
453 | } | |
454 | ||
455 | ||
456 | /* Only called when an error happened or at the end of a page */ | |
457 | ||
458 | static irqreturn_t slm_interrupt(int irc, void *data, struct pt_regs *fp) | |
459 | ||
460 | { unsigned long addr; | |
461 | int stat; | |
462 | ||
463 | STOP_TIMER(); | |
464 | addr = get_dma_addr(); | |
465 | stat = acsi_getstatus(); | |
466 | SLMError = (stat < 0) ? SLMSTAT_ACSITO : | |
467 | (addr < virt_to_phys(BufferP)) ? SLMSTAT_NOTALL : | |
468 | stat; | |
469 | ||
470 | dma_wd.dma_mode_status = 0x80; | |
471 | MFPDELAY(); | |
472 | #ifdef DEBUG | |
473 | printk( "SLM: interrupt, addr=%#lx, error=%d\n", addr, SLMError ); | |
474 | #endif | |
475 | ||
476 | wake_up( &print_wait ); | |
477 | stdma_release(); | |
478 | ENABLE_IRQ(); | |
479 | return IRQ_HANDLED; | |
480 | } | |
481 | ||
482 | ||
483 | static void slm_test_ready( unsigned long dummy ) | |
484 | ||
485 | { | |
486 | #ifdef SLM_CONT_CNT_REPROG | |
487 | /* program for 255*512 bytes again */ | |
488 | dma_wd.fdc_acces_seccount = SLM_DMA_AMOUNT; | |
489 | START_TIMER( DMA_TIME_FOR(0) ); | |
490 | #ifdef DEBUG | |
491 | printk( "SLM: reprogramming timer for %d jiffies, addr=%#lx\n", | |
492 | DMA_TIME_FOR(0), get_dma_addr() ); | |
493 | #endif | |
494 | ||
495 | #else /* !SLM_CONT_CNT_REPROG */ | |
496 | ||
497 | unsigned long flags, addr; | |
498 | int d, ti; | |
499 | #ifdef DEBUG | |
500 | struct timeval start_tm, end_tm; | |
501 | int did_wait = 0; | |
502 | #endif | |
503 | ||
504 | local_irq_save(flags); | |
505 | ||
506 | addr = get_dma_addr(); | |
507 | if ((d = SLMEndAddr - addr) > 0) { | |
508 | local_irq_restore(flags); | |
509 | ||
510 | /* slice not yet finished, decide whether to start another timer or to | |
511 | * busy-wait */ | |
512 | ti = DMA_TIME_FOR( d ); | |
513 | if (ti > 0) { | |
514 | #ifdef DEBUG | |
515 | printk( "SLM: reprogramming timer for %d jiffies, rest %d bytes\n", | |
516 | ti, d ); | |
517 | #endif | |
518 | START_TIMER( ti ); | |
519 | return; | |
520 | } | |
521 | /* wait for desired end address to be reached */ | |
522 | #ifdef DEBUG | |
523 | do_gettimeofday( &start_tm ); | |
524 | did_wait = 1; | |
525 | #endif | |
526 | local_irq_disable(); | |
527 | while( get_dma_addr() < SLMEndAddr ) | |
528 | barrier(); | |
529 | } | |
530 | ||
531 | /* slice finished, start next one */ | |
532 | SLMCurAddr += SLMSliceSize; | |
533 | ||
534 | #ifdef SLM_CONTINUOUS_DMA | |
535 | /* program for 255*512 bytes again */ | |
536 | dma_wd.fdc_acces_seccount = SLM_DMA_AMOUNT; | |
537 | #else | |
538 | /* set DMA address; | |
539 | * add 2 bytes for the ones in the SLM controller FIFO! */ | |
540 | set_dma_addr( SLMCurAddr + 2 ); | |
541 | /* toggle DMA to write and select sector counter reg */ | |
542 | dma_wd.dma_mode_status = 0x92; | |
543 | MFPDELAY(); | |
544 | dma_wd.dma_mode_status = 0x192; | |
545 | MFPDELAY(); | |
546 | /* program for 255*512 bytes and start DMA */ | |
547 | DMA_LONG_WRITE( SLM_DMA_AMOUNT, 0x112 ); | |
548 | #endif | |
549 | ||
550 | local_irq_restore(flags); | |
551 | ||
552 | #ifdef DEBUG | |
553 | if (did_wait) { | |
554 | int ms; | |
555 | do_gettimeofday( &end_tm ); | |
556 | ms = (end_tm.tv_sec*1000000+end_tm.tv_usec) - | |
557 | (start_tm.tv_sec*1000000+start_tm.tv_usec); | |
558 | printk( "SLM: did %ld.%ld ms busy waiting for %d bytes\n", | |
559 | ms/1000, ms%1000, d ); | |
560 | } | |
561 | else | |
562 | printk( "SLM: didn't wait (!)\n" ); | |
563 | #endif | |
564 | ||
565 | if ((unsigned char *)PTOV( SLMCurAddr + SLMSliceSize ) >= BufferP) { | |
566 | /* will be last slice, no timer necessary */ | |
567 | #ifdef DEBUG | |
568 | printk( "SLM: CurAddr=%#lx EndAddr=%#lx last slice -> no timer\n", | |
569 | SLMCurAddr, SLMEndAddr ); | |
570 | #endif | |
571 | } | |
572 | else { | |
573 | /* not last slice */ | |
574 | SLMEndAddr = SLMCurAddr + SLMSliceSize + SLM_DMA_INT_OFFSET; | |
575 | START_TIMER( DMA_TIME_FOR( SLMSliceSize )); | |
576 | #ifdef DEBUG | |
577 | printk( "SLM: CurAddr=%#lx EndAddr=%#lx timer=%ld\n", | |
578 | SLMCurAddr, SLMEndAddr, DMA_TIME_FOR( SLMSliceSize ) ); | |
579 | #endif | |
580 | } | |
581 | #endif /* SLM_CONT_CNT_REPROG */ | |
582 | } | |
583 | ||
584 | ||
585 | static void set_dma_addr( unsigned long paddr ) | |
586 | ||
587 | { unsigned long flags; | |
588 | ||
589 | local_irq_save(flags); | |
590 | dma_wd.dma_lo = (unsigned char)paddr; | |
591 | paddr >>= 8; | |
592 | MFPDELAY(); | |
593 | dma_wd.dma_md = (unsigned char)paddr; | |
594 | paddr >>= 8; | |
595 | MFPDELAY(); | |
596 | if (ATARIHW_PRESENT( EXTD_DMA )) | |
597 | st_dma_ext_dmahi = (unsigned short)paddr; | |
598 | else | |
599 | dma_wd.dma_hi = (unsigned char)paddr; | |
600 | MFPDELAY(); | |
601 | local_irq_restore(flags); | |
602 | } | |
603 | ||
604 | ||
605 | static unsigned long get_dma_addr( void ) | |
606 | ||
607 | { unsigned long addr; | |
608 | ||
609 | addr = dma_wd.dma_lo & 0xff; | |
610 | MFPDELAY(); | |
611 | addr |= (dma_wd.dma_md & 0xff) << 8; | |
612 | MFPDELAY(); | |
613 | addr |= (dma_wd.dma_hi & 0xff) << 16; | |
614 | MFPDELAY(); | |
615 | ||
616 | return( addr ); | |
617 | } | |
618 | ||
619 | ||
620 | static ssize_t slm_write( struct file *file, const char *buf, size_t count, | |
621 | loff_t *ppos ) | |
622 | ||
623 | { | |
624 | struct inode *node = file->f_dentry->d_inode; | |
625 | int device = iminor(node); | |
626 | int n, filled, w, h; | |
627 | ||
628 | while( SLMState == PRINTING || | |
629 | (SLMState == FILLING && SLMBufOwner != device) ) { | |
630 | interruptible_sleep_on( &slm_wait ); | |
631 | if (signal_pending(current)) | |
632 | return( -ERESTARTSYS ); | |
633 | } | |
634 | if (SLMState == IDLE) { | |
635 | /* first data of page: get current page size */ | |
636 | if (slm_get_pagesize( device, &w, &h )) | |
637 | return( -EIO ); | |
638 | BufferSize = w*h/8; | |
639 | if (BufferSize > SLM_BUFFER_SIZE) | |
640 | return( -ENOMEM ); | |
641 | ||
642 | SLMState = FILLING; | |
643 | SLMBufOwner = device; | |
644 | } | |
645 | ||
646 | n = count; | |
647 | filled = BufferP - SLMBuffer; | |
648 | if (filled + n > BufferSize) | |
649 | n = BufferSize - filled; | |
650 | ||
651 | if (copy_from_user(BufferP, buf, n)) | |
652 | return -EFAULT; | |
653 | BufferP += n; | |
654 | filled += n; | |
655 | ||
656 | if (filled == BufferSize) { | |
657 | /* Check the paper size again! The user may have switched it in the | |
658 | * time between starting the data and finishing them. Would end up in | |
659 | * a trashy page... */ | |
660 | if (slm_get_pagesize( device, &w, &h )) | |
661 | return( -EIO ); | |
662 | if (BufferSize != w*h/8) { | |
663 | printk( KERN_NOTICE "slm%d: page size changed while printing\n", | |
664 | device ); | |
665 | return( -EAGAIN ); | |
666 | } | |
667 | ||
668 | SLMState = PRINTING; | |
669 | /* choose a slice size that is a multiple of the line size */ | |
670 | #ifndef SLM_CONT_CNT_REPROG | |
671 | SLMSliceSize = SLM_SLICE_SIZE(w); | |
672 | #endif | |
673 | ||
674 | start_print( device ); | |
675 | sleep_on( &print_wait ); | |
676 | if (SLMError && IS_REAL_ERROR(SLMError)) { | |
677 | printk( KERN_ERR "slm%d: %s\n", device, slm_errstr(SLMError) ); | |
678 | n = -EIO; | |
679 | } | |
680 | ||
681 | SLMState = IDLE; | |
682 | BufferP = SLMBuffer; | |
683 | wake_up_interruptible( &slm_wait ); | |
684 | } | |
685 | ||
686 | return( n ); | |
687 | } | |
688 | ||
689 | ||
690 | /* ---------------------------------------------------------------------- */ | |
691 | /* ioctl Functions */ | |
692 | ||
693 | ||
694 | static int slm_ioctl( struct inode *inode, struct file *file, | |
695 | unsigned int cmd, unsigned long arg ) | |
696 | ||
697 | { int device = iminor(inode), err; | |
698 | ||
699 | /* I can think of setting: | |
700 | * - manual feed | |
701 | * - paper format | |
702 | * - copy count | |
703 | * - ... | |
704 | * but haven't implemented that yet :-) | |
705 | * BTW, has anybody better docs about the MODE SENSE/MODE SELECT data? | |
706 | */ | |
707 | switch( cmd ) { | |
708 | ||
709 | case SLMIORESET: /* reset buffer, i.e. empty the buffer */ | |
710 | if (!(file->f_mode & 2)) | |
711 | return( -EINVAL ); | |
712 | if (SLMState == PRINTING) | |
713 | return( -EBUSY ); | |
714 | SLMState = IDLE; | |
715 | BufferP = SLMBuffer; | |
716 | wake_up_interruptible( &slm_wait ); | |
717 | return( 0 ); | |
718 | ||
719 | case SLMIOGSTAT: { /* get status */ | |
720 | int stat; | |
721 | char *str; | |
722 | ||
723 | stat = slm_req_sense( device ); | |
724 | if (arg) { | |
725 | str = slm_errstr( stat ); | |
726 | if (put_user(stat, | |
727 | (long *)&((struct SLM_status *)arg)->stat)) | |
728 | return -EFAULT; | |
729 | if (copy_to_user( ((struct SLM_status *)arg)->str, str, | |
730 | strlen(str) + 1)) | |
731 | return -EFAULT; | |
732 | } | |
733 | return( stat ); | |
734 | } | |
735 | ||
736 | case SLMIOGPSIZE: { /* get paper size */ | |
737 | int w, h; | |
738 | ||
739 | if ((err = slm_get_pagesize( device, &w, &h ))) return( err ); | |
740 | ||
741 | if (put_user(w, (long *)&((struct SLM_paper_size *)arg)->width)) | |
742 | return -EFAULT; | |
743 | if (put_user(h, (long *)&((struct SLM_paper_size *)arg)->height)) | |
744 | return -EFAULT; | |
745 | return( 0 ); | |
746 | } | |
747 | ||
748 | case SLMIOGMFEED: /* get manual feed */ | |
749 | return( -EINVAL ); | |
750 | ||
751 | case SLMIOSPSIZE: /* set paper size */ | |
752 | return( -EINVAL ); | |
753 | ||
754 | case SLMIOSMFEED: /* set manual feed */ | |
755 | return( -EINVAL ); | |
756 | ||
757 | } | |
758 | return( -EINVAL ); | |
759 | } | |
760 | ||
761 | ||
762 | /* ---------------------------------------------------------------------- */ | |
763 | /* Opening and Closing */ | |
764 | ||
765 | ||
766 | static int slm_open( struct inode *inode, struct file *file ) | |
767 | ||
768 | { int device; | |
769 | struct slm *sip; | |
770 | ||
771 | device = iminor(inode); | |
772 | if (device >= N_SLM_Printers) | |
773 | return( -ENXIO ); | |
774 | sip = &slm_info[device]; | |
775 | ||
776 | if (file->f_mode & 2) { | |
777 | /* open for writing is exclusive */ | |
778 | if ( !atomic_dec_and_test(&sip->wr_ok) ) { | |
779 | atomic_inc(&sip->wr_ok); | |
780 | return( -EBUSY ); | |
781 | } | |
782 | } | |
783 | if (file->f_mode & 1) { | |
784 | /* open for reading is exclusive */ | |
785 | if ( !atomic_dec_and_test(&sip->rd_ok) ) { | |
786 | atomic_inc(&sip->rd_ok); | |
787 | return( -EBUSY ); | |
788 | } | |
789 | } | |
790 | ||
791 | return( 0 ); | |
792 | } | |
793 | ||
794 | ||
795 | static int slm_release( struct inode *inode, struct file *file ) | |
796 | ||
797 | { int device; | |
798 | struct slm *sip; | |
799 | ||
800 | device = iminor(inode); | |
801 | sip = &slm_info[device]; | |
802 | ||
803 | if (file->f_mode & 2) | |
804 | atomic_inc( &sip->wr_ok ); | |
805 | if (file->f_mode & 1) | |
806 | atomic_inc( &sip->rd_ok ); | |
807 | ||
808 | return( 0 ); | |
809 | } | |
810 | ||
811 | ||
812 | /* ---------------------------------------------------------------------- */ | |
813 | /* ACSI Primitives for the SLM */ | |
814 | ||
815 | ||
816 | static int slm_req_sense( int device ) | |
817 | ||
818 | { int stat, rv; | |
819 | struct slm *sip = &slm_info[device]; | |
820 | ||
821 | stdma_lock( NULL, NULL ); | |
822 | ||
823 | CMDSET_TARG_LUN( slmreqsense_cmd, sip->target, sip->lun ); | |
824 | if (!acsicmd_nodma( slmreqsense_cmd, 0 ) || | |
825 | (stat = acsi_getstatus()) < 0) | |
826 | rv = SLMSTAT_ACSITO; | |
827 | else | |
828 | rv = stat & 0x1f; | |
829 | ||
830 | ENABLE_IRQ(); | |
831 | stdma_release(); | |
832 | return( rv ); | |
833 | } | |
834 | ||
835 | ||
836 | static int slm_mode_sense( int device, char *buffer, int abs_flag ) | |
837 | ||
838 | { unsigned char stat, len; | |
839 | int rv = 0; | |
840 | struct slm *sip = &slm_info[device]; | |
841 | ||
842 | stdma_lock( NULL, NULL ); | |
843 | ||
844 | CMDSET_TARG_LUN( slmmsense_cmd, sip->target, sip->lun ); | |
845 | slmmsense_cmd[5] = abs_flag ? 0x80 : 0; | |
846 | if (!acsicmd_nodma( slmmsense_cmd, 0 )) { | |
847 | rv = SLMSTAT_ACSITO; | |
848 | goto the_end; | |
849 | } | |
850 | ||
851 | if (!acsi_extstatus( &stat, 1 )) { | |
852 | acsi_end_extstatus(); | |
853 | rv = SLMSTAT_ACSITO; | |
854 | goto the_end; | |
855 | } | |
856 | ||
857 | if (!acsi_extstatus( &len, 1 )) { | |
858 | acsi_end_extstatus(); | |
859 | rv = SLMSTAT_ACSITO; | |
860 | goto the_end; | |
861 | } | |
862 | buffer[0] = len; | |
863 | if (!acsi_extstatus( buffer+1, len )) { | |
864 | acsi_end_extstatus(); | |
865 | rv = SLMSTAT_ACSITO; | |
866 | goto the_end; | |
867 | } | |
868 | ||
869 | acsi_end_extstatus(); | |
870 | rv = stat & 0x1f; | |
871 | ||
872 | the_end: | |
873 | ENABLE_IRQ(); | |
874 | stdma_release(); | |
875 | return( rv ); | |
876 | } | |
877 | ||
878 | ||
879 | #if 0 | |
880 | /* currently unused */ | |
881 | static int slm_mode_select( int device, char *buffer, int len, | |
882 | int default_flag ) | |
883 | ||
884 | { int stat, rv; | |
885 | struct slm *sip = &slm_info[device]; | |
886 | ||
887 | stdma_lock( NULL, NULL ); | |
888 | ||
889 | CMDSET_TARG_LUN( slmmselect_cmd, sip->target, sip->lun ); | |
890 | slmmselect_cmd[5] = default_flag ? 0x80 : 0; | |
891 | if (!acsicmd_nodma( slmmselect_cmd, 0 )) { | |
892 | rv = SLMSTAT_ACSITO; | |
893 | goto the_end; | |
894 | } | |
895 | ||
896 | if (!default_flag) { | |
897 | unsigned char c = len; | |
898 | if (!acsi_extcmd( &c, 1 )) { | |
899 | rv = SLMSTAT_ACSITO; | |
900 | goto the_end; | |
901 | } | |
902 | if (!acsi_extcmd( buffer, len )) { | |
903 | rv = SLMSTAT_ACSITO; | |
904 | goto the_end; | |
905 | } | |
906 | } | |
907 | ||
908 | stat = acsi_getstatus(); | |
909 | rv = (stat < 0 ? SLMSTAT_ACSITO : stat); | |
910 | ||
911 | the_end: | |
912 | ENABLE_IRQ(); | |
913 | stdma_release(); | |
914 | return( rv ); | |
915 | } | |
916 | #endif | |
917 | ||
918 | ||
919 | static int slm_get_pagesize( int device, int *w, int *h ) | |
920 | ||
921 | { char buf[256]; | |
922 | int stat; | |
923 | ||
924 | stat = slm_mode_sense( device, buf, 0 ); | |
925 | ENABLE_IRQ(); | |
926 | stdma_release(); | |
927 | ||
928 | if (stat != SLMSTAT_OK) | |
929 | return( -EIO ); | |
930 | ||
931 | *w = (buf[3] << 8) | buf[4]; | |
932 | *h = (buf[1] << 8) | buf[2]; | |
933 | return( 0 ); | |
934 | } | |
935 | ||
936 | ||
937 | /* ---------------------------------------------------------------------- */ | |
938 | /* Initialization */ | |
939 | ||
940 | ||
941 | int attach_slm( int target, int lun ) | |
942 | ||
943 | { static int did_register; | |
944 | int len; | |
945 | ||
946 | if (N_SLM_Printers >= MAX_SLM) { | |
947 | printk( KERN_WARNING "Too much SLMs\n" ); | |
948 | return( 0 ); | |
949 | } | |
950 | ||
951 | /* do an INQUIRY */ | |
952 | udelay(100); | |
953 | CMDSET_TARG_LUN( slminquiry_cmd, target, lun ); | |
954 | if (!acsicmd_nodma( slminquiry_cmd, 0 )) { | |
955 | inq_timeout: | |
956 | printk( KERN_ERR "SLM inquiry command timed out.\n" ); | |
957 | inq_fail: | |
958 | acsi_end_extstatus(); | |
959 | return( 0 ); | |
960 | } | |
961 | /* read status and header of return data */ | |
962 | if (!acsi_extstatus( SLMBuffer, 6 )) | |
963 | goto inq_timeout; | |
964 | ||
965 | if (SLMBuffer[1] != 2) { /* device type == printer? */ | |
966 | printk( KERN_ERR "SLM inquiry returned device type != printer\n" ); | |
967 | goto inq_fail; | |
968 | } | |
969 | len = SLMBuffer[5]; | |
970 | ||
971 | /* read id string */ | |
972 | if (!acsi_extstatus( SLMBuffer, len )) | |
973 | goto inq_timeout; | |
974 | acsi_end_extstatus(); | |
975 | SLMBuffer[len] = 0; | |
976 | ||
977 | if (!did_register) { | |
978 | did_register = 1; | |
979 | } | |
980 | ||
981 | slm_info[N_SLM_Printers].target = target; | |
982 | slm_info[N_SLM_Printers].lun = lun; | |
983 | atomic_set(&slm_info[N_SLM_Printers].wr_ok, 1 ); | |
984 | atomic_set(&slm_info[N_SLM_Printers].rd_ok, 1 ); | |
985 | ||
986 | printk( KERN_INFO " Printer: %s\n", SLMBuffer ); | |
987 | printk( KERN_INFO "Detected slm%d at id %d lun %d\n", | |
988 | N_SLM_Printers, target, lun ); | |
989 | N_SLM_Printers++; | |
990 | return( 1 ); | |
991 | } | |
992 | ||
993 | int slm_init( void ) | |
994 | ||
995 | { | |
996 | int i; | |
997 | if (register_chrdev( ACSI_MAJOR, "slm", &slm_fops )) { | |
998 | printk( KERN_ERR "Unable to get major %d for ACSI SLM\n", ACSI_MAJOR ); | |
999 | return -EBUSY; | |
1000 | } | |
1001 | ||
1002 | if (!(SLMBuffer = atari_stram_alloc( SLM_BUFFER_SIZE, "SLM" ))) { | |
1003 | printk( KERN_ERR "Unable to get SLM ST-Ram buffer.\n" ); | |
1004 | unregister_chrdev( ACSI_MAJOR, "slm" ); | |
1005 | return -ENOMEM; | |
1006 | } | |
1007 | BufferP = SLMBuffer; | |
1008 | SLMState = IDLE; | |
1009 | ||
1010 | devfs_mk_dir("slm"); | |
1011 | for (i = 0; i < MAX_SLM; i++) { | |
1012 | devfs_mk_cdev(MKDEV(ACSI_MAJOR, i), | |
1013 | S_IFCHR|S_IRUSR|S_IWUSR, "slm/%d", i); | |
1014 | } | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | #ifdef MODULE | |
1019 | ||
1020 | /* from acsi.c */ | |
1021 | void acsi_attach_SLMs( int (*attach_func)( int, int ) ); | |
1022 | ||
1023 | int init_module(void) | |
1024 | { | |
1025 | int err; | |
1026 | ||
1027 | if ((err = slm_init())) | |
1028 | return( err ); | |
1029 | /* This calls attach_slm() for every target/lun where acsi.c detected a | |
1030 | * printer */ | |
1031 | acsi_attach_SLMs( attach_slm ); | |
1032 | return( 0 ); | |
1033 | } | |
1034 | ||
1035 | void cleanup_module(void) | |
1036 | { | |
1037 | int i; | |
1038 | for (i = 0; i < MAX_SLM; i++) | |
1039 | devfs_remove("slm/%d", i); | |
1040 | devfs_remove("slm"); | |
1041 | if (unregister_chrdev( ACSI_MAJOR, "slm" ) != 0) | |
1042 | printk( KERN_ERR "acsi_slm: cleanup_module failed\n"); | |
1043 | atari_stram_free( SLMBuffer ); | |
1044 | } | |
1045 | #endif |