Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 1 | /* |
| 2 | comedi/drivers/pcl816.c |
| 3 | |
| 4 | Author: Juan Grigera <juan@grigera.com.ar> |
| 5 | based on pcl818 by Michal Dobes <dobes@tesnet.cz> and bits of pcl812 |
| 6 | |
| 7 | hardware driver for Advantech cards: |
| 8 | card: PCL-816, PCL814B |
| 9 | driver: pcl816 |
| 10 | */ |
| 11 | /* |
| 12 | Driver: pcl816 |
| 13 | Description: Advantech PCL-816 cards, PCL-814 |
| 14 | Author: Juan Grigera <juan@grigera.com.ar> |
| 15 | Devices: [Advantech] PCL-816 (pcl816), PCL-814B (pcl814b) |
| 16 | Status: works |
| 17 | Updated: Tue, 2 Apr 2002 23:15:21 -0800 |
| 18 | |
| 19 | PCL 816 and 814B have 16 SE/DIFF ADCs, 16 DACs, 16 DI and 16 DO. |
| 20 | Differences are at resolution (16 vs 12 bits). |
| 21 | |
| 22 | The driver support AI command mode, other subdevices not written. |
| 23 | |
| 24 | Analog output and digital input and output are not supported. |
| 25 | |
| 26 | Configuration Options: |
| 27 | [0] - IO Base |
| 28 | [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7) |
| 29 | [2] - DMA (0=disable, 1, 3) |
| 30 | [3] - 0, 10=10MHz clock for 8254 |
| 31 | 1= 1MHz clock for 8254 |
| 32 | |
| 33 | */ |
| 34 | |
| 35 | #include "../comedidev.h" |
| 36 | |
| 37 | #include <linux/ioport.h> |
| 38 | #include <linux/mc146818rtc.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include <asm/dma.h> |
| 41 | |
| 42 | #include "8253.h" |
| 43 | |
| 44 | #define DEBUG(x) x |
| 45 | |
| 46 | // boards constants |
| 47 | // IO space len |
| 48 | #define PCLx1x_RANGE 16 |
| 49 | |
| 50 | //#define outb(x,y) printk("OUTB(%x, 200+%d)\n", x,y-0x200); outb(x,y) |
| 51 | |
| 52 | // INTEL 8254 counters |
| 53 | #define PCL816_CTR0 4 |
| 54 | #define PCL816_CTR1 5 |
| 55 | #define PCL816_CTR2 6 |
| 56 | // R: counter read-back register W: counter control |
| 57 | #define PCL816_CTRCTL 7 |
| 58 | |
| 59 | // R: A/D high byte W: A/D range control |
| 60 | #define PCL816_RANGE 9 |
| 61 | // W: clear INT request |
| 62 | #define PCL816_CLRINT 10 |
| 63 | // R: next mux scan channel W: mux scan channel & range control pointer |
| 64 | #define PCL816_MUX 11 |
| 65 | // R/W: operation control register |
| 66 | #define PCL816_CONTROL 12 |
| 67 | |
| 68 | // R: return status byte W: set DMA/IRQ |
| 69 | #define PCL816_STATUS 13 |
| 70 | #define PCL816_STATUS_DRDY_MASK 0x80 |
| 71 | |
| 72 | // R: low byte of A/D W: soft A/D trigger |
| 73 | #define PCL816_AD_LO 8 |
| 74 | // R: high byte of A/D W: A/D range control |
| 75 | #define PCL816_AD_HI 9 |
| 76 | |
| 77 | // type of interrupt handler |
| 78 | #define INT_TYPE_AI1_INT 1 |
| 79 | #define INT_TYPE_AI1_DMA 2 |
| 80 | #define INT_TYPE_AI3_INT 4 |
| 81 | #define INT_TYPE_AI3_DMA 5 |
| 82 | #ifdef unused |
| 83 | #define INT_TYPE_AI1_DMA_RTC 9 |
| 84 | #define INT_TYPE_AI3_DMA_RTC 10 |
| 85 | |
| 86 | // RTC stuff... |
| 87 | #define RTC_IRQ 8 |
| 88 | #define RTC_IO_EXTENT 0x10 |
| 89 | #endif |
| 90 | |
| 91 | #define MAGIC_DMA_WORD 0x5a5a |
| 92 | |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 93 | static const struct comedi_lrange range_pcl816 = { 8, { |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 94 | BIP_RANGE(10), |
| 95 | BIP_RANGE(5), |
| 96 | BIP_RANGE(2.5), |
| 97 | BIP_RANGE(1.25), |
| 98 | UNI_RANGE(10), |
| 99 | UNI_RANGE(5), |
| 100 | UNI_RANGE(2.5), |
| 101 | UNI_RANGE(1.25), |
| 102 | } |
| 103 | }; |
| 104 | typedef struct { |
| 105 | const char *name; // board name |
| 106 | int n_ranges; // len of range list |
| 107 | int n_aichan; // num of A/D chans in diferencial mode |
| 108 | unsigned int ai_ns_min; // minimal alllowed delay between samples (in ns) |
| 109 | int n_aochan; // num of D/A chans |
| 110 | int n_dichan; // num of DI chans |
| 111 | int n_dochan; // num of DO chans |
Bill Pemberton | 9ced1de | 2009-03-16 22:05:31 -0400 | [diff] [blame] | 112 | const struct comedi_lrange *ai_range_type; // default A/D rangelist |
| 113 | const struct comedi_lrange *ao_range_type; // dafault D/A rangelist |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 114 | unsigned int io_range; // len of IO space |
| 115 | unsigned int IRQbits; // allowed interrupts |
| 116 | unsigned int DMAbits; // allowed DMA chans |
| 117 | int ai_maxdata; // maxdata for A/D |
| 118 | int ao_maxdata; // maxdata for D/A |
| 119 | int ai_chanlist; // allowed len of channel list A/D |
| 120 | int ao_chanlist; // allowed len of channel list D/A |
| 121 | int i8254_osc_base; // 1/frequency of on board oscilator in ns |
| 122 | } boardtype; |
| 123 | |
| 124 | static const boardtype boardtypes[] = { |
| 125 | {"pcl816", 8, 16, 10000, 1, 16, 16, &range_pcl816, |
| 126 | &range_pcl816, PCLx1x_RANGE, |
| 127 | 0x00fc, // IRQ mask |
| 128 | 0x0a, // DMA mask |
| 129 | 0xffff, // 16-bit card |
| 130 | 0xffff, // D/A maxdata |
| 131 | 1024, |
| 132 | 1, // ao chan list |
| 133 | 100}, |
| 134 | {"pcl814b", 8, 16, 10000, 1, 16, 16, &range_pcl816, |
| 135 | &range_pcl816, PCLx1x_RANGE, |
| 136 | 0x00fc, |
| 137 | 0x0a, |
| 138 | 0x3fff, /* 14 bit card */ |
| 139 | 0x3fff, |
| 140 | 1024, |
| 141 | 1, |
| 142 | 100}, |
| 143 | }; |
| 144 | |
| 145 | #define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype)) |
Bill Pemberton | fe0ff17 | 2009-03-16 22:18:43 -0400 | [diff] [blame^] | 146 | #define devpriv ((struct pcl816_private *)dev->private) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 147 | #define this_board ((const boardtype *)dev->board_ptr) |
| 148 | |
Bill Pemberton | 0707bb0 | 2009-03-16 22:06:20 -0400 | [diff] [blame] | 149 | static int pcl816_attach(struct comedi_device * dev, struct comedi_devconfig * it); |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 150 | static int pcl816_detach(struct comedi_device * dev); |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 151 | |
| 152 | #ifdef unused |
| 153 | static int RTC_lock = 0; /* RTC lock */ |
| 154 | static int RTC_timer_lock = 0; /* RTC int lock */ |
| 155 | #endif |
| 156 | |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 157 | static struct comedi_driver driver_pcl816 = { |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 158 | driver_name:"pcl816", |
| 159 | module:THIS_MODULE, |
| 160 | attach:pcl816_attach, |
| 161 | detach:pcl816_detach, |
| 162 | board_name:&boardtypes[0].name, |
| 163 | num_names:n_boardtypes, |
| 164 | offset:sizeof(boardtype), |
| 165 | }; |
| 166 | |
| 167 | COMEDI_INITCLEANUP(driver_pcl816); |
| 168 | |
Bill Pemberton | fe0ff17 | 2009-03-16 22:18:43 -0400 | [diff] [blame^] | 169 | struct pcl816_private { |
| 170 | |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 171 | unsigned int dma; // used DMA, 0=don't use DMA |
| 172 | int dma_rtc; // 1=RTC used with DMA, 0=no RTC alloc |
| 173 | #ifdef unused |
| 174 | unsigned long rtc_iobase; // RTC port region |
| 175 | unsigned int rtc_iosize; |
| 176 | unsigned int rtc_irq; |
| 177 | #endif |
| 178 | unsigned long dmabuf[2]; // pointers to begin of DMA buffers |
| 179 | unsigned int dmapages[2]; // len of DMA buffers in PAGE_SIZEs |
| 180 | unsigned int hwdmaptr[2]; // hardware address of DMA buffers |
| 181 | unsigned int hwdmasize[2]; // len of DMA buffers in Bytes |
| 182 | unsigned int dmasamplsize; // size in samples hwdmasize[0]/2 |
| 183 | unsigned int last_top_dma; // DMA pointer in last RTC int |
| 184 | int next_dma_buf; // which DMA buffer will be used next round |
| 185 | long dma_runs_to_end; // how many we must permorm DMA transfer to end of record |
| 186 | unsigned long last_dma_run; // how many bytes we must transfer on last DMA page |
| 187 | |
| 188 | unsigned int ai_scans; // len of scanlist |
| 189 | unsigned char ai_neverending; // if=1, then we do neverending record (you must use cancel()) |
| 190 | int irq_free; // 1=have allocated IRQ |
| 191 | int irq_blocked; // 1=IRQ now uses any subdev |
| 192 | #ifdef unused |
| 193 | int rtc_irq_blocked; // 1=we now do AI with DMA&RTC |
| 194 | #endif |
| 195 | int irq_was_now_closed; // when IRQ finish, there's stored int816_mode for last interrupt |
| 196 | int int816_mode; // who now uses IRQ - 1=AI1 int, 2=AI1 dma, 3=AI3 int, 4AI3 dma |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 197 | struct comedi_subdevice *last_int_sub; // ptr to subdevice which now finish |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 198 | int ai_act_scan; // how many scans we finished |
| 199 | unsigned int ai_act_chanlist[16]; // MUX setting for actual AI operations |
| 200 | unsigned int ai_act_chanlist_len; // how long is actual MUX list |
| 201 | unsigned int ai_act_chanlist_pos; // actual position in MUX list |
| 202 | unsigned int ai_poll_ptr; // how many sampes transfer poll |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 203 | struct comedi_subdevice *sub_ai; // ptr to AI subdevice |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 204 | #ifdef unused |
| 205 | struct timer_list rtc_irq_timer; // timer for RTC sanity check |
| 206 | unsigned long rtc_freq; // RTC int freq |
| 207 | #endif |
Bill Pemberton | fe0ff17 | 2009-03-16 22:18:43 -0400 | [diff] [blame^] | 208 | }; |
| 209 | |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 210 | |
| 211 | /* |
| 212 | ============================================================================== |
| 213 | */ |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 214 | static int check_and_setup_channel_list(struct comedi_device * dev, |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 215 | struct comedi_subdevice * s, unsigned int *chanlist, int chanlen); |
| 216 | static int pcl816_ai_cancel(struct comedi_device * dev, struct comedi_subdevice * s); |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 217 | static void start_pacer(struct comedi_device * dev, int mode, unsigned int divisor1, |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 218 | unsigned int divisor2); |
| 219 | #ifdef unused |
| 220 | static int set_rtc_irq_bit(unsigned char bit); |
| 221 | #endif |
| 222 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 223 | static int pcl816_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s, |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 224 | struct comedi_cmd * cmd); |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 225 | static int pcl816_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s); |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 226 | |
| 227 | /* |
| 228 | ============================================================================== |
| 229 | ANALOG INPUT MODE0, 816 cards, slow version |
| 230 | */ |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 231 | static int pcl816_ai_insn_read(struct comedi_device * dev, struct comedi_subdevice * s, |
Bill Pemberton | 90035c0 | 2009-03-16 22:05:53 -0400 | [diff] [blame] | 232 | struct comedi_insn * insn, unsigned int * data) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 233 | { |
| 234 | int n; |
| 235 | int timeout; |
| 236 | |
| 237 | DPRINTK("mode 0 analog input\n"); |
| 238 | // software trigger, DMA and INT off |
| 239 | outb(0, dev->iobase + PCL816_CONTROL); |
| 240 | // clear INT (conversion end) flag |
| 241 | outb(0, dev->iobase + PCL816_CLRINT); |
| 242 | |
| 243 | // Set the input channel |
| 244 | outb(CR_CHAN(insn->chanspec) & 0xf, dev->iobase + PCL816_MUX); |
| 245 | outb(CR_RANGE(insn->chanspec), dev->iobase + PCL816_RANGE); /* select gain */ |
| 246 | |
| 247 | for (n = 0; n < insn->n; n++) { |
| 248 | |
| 249 | outb(0, dev->iobase + PCL816_AD_LO); /* start conversion */ |
| 250 | |
| 251 | timeout = 100; |
| 252 | while (timeout--) { |
| 253 | if (!(inb(dev->iobase + PCL816_STATUS) & |
| 254 | PCL816_STATUS_DRDY_MASK)) { |
| 255 | // return read value |
| 256 | data[n] = |
| 257 | ((inb(dev->iobase + |
| 258 | PCL816_AD_HI) << 8) | |
| 259 | (inb(dev->iobase + PCL816_AD_LO))); |
| 260 | |
| 261 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT (conversion end) flag */ |
| 262 | break; |
| 263 | } |
| 264 | comedi_udelay(1); |
| 265 | } |
| 266 | // Return timeout error |
| 267 | if (!timeout) { |
| 268 | comedi_error(dev, "A/D insn timeout\n"); |
| 269 | data[0] = 0; |
| 270 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT (conversion end) flag */ |
| 271 | return -EIO; |
| 272 | } |
| 273 | |
| 274 | } |
| 275 | return n; |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | ============================================================================== |
| 280 | analog input interrupt mode 1 & 3, 818 cards |
| 281 | one sample per interrupt version |
| 282 | */ |
| 283 | static irqreturn_t interrupt_pcl816_ai_mode13_int(int irq, void *d) |
| 284 | { |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 285 | struct comedi_device *dev = d; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 286 | struct comedi_subdevice *s = dev->subdevices + 0; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 287 | int low, hi; |
| 288 | int timeout = 50; /* wait max 50us */ |
| 289 | |
| 290 | while (timeout--) { |
| 291 | if (!(inb(dev->iobase + PCL816_STATUS) & |
| 292 | PCL816_STATUS_DRDY_MASK)) |
| 293 | break; |
| 294 | comedi_udelay(1); |
| 295 | } |
| 296 | if (!timeout) { // timeout, bail error |
| 297 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT request */ |
| 298 | comedi_error(dev, "A/D mode1/3 IRQ without DRDY!"); |
| 299 | pcl816_ai_cancel(dev, s); |
| 300 | s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR; |
| 301 | comedi_event(dev, s); |
| 302 | return IRQ_HANDLED; |
| 303 | |
| 304 | } |
| 305 | |
| 306 | // get the sample |
| 307 | low = inb(dev->iobase + PCL816_AD_LO); |
| 308 | hi = inb(dev->iobase + PCL816_AD_HI); |
| 309 | |
| 310 | comedi_buf_put(s->async, (hi << 8) | low); |
| 311 | |
| 312 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT request */ |
| 313 | |
| 314 | if (++devpriv->ai_act_chanlist_pos >= devpriv->ai_act_chanlist_len) |
| 315 | devpriv->ai_act_chanlist_pos = 0; |
| 316 | |
| 317 | if (s->async->cur_chan == 0) { |
| 318 | devpriv->ai_act_scan++; |
| 319 | } |
| 320 | |
| 321 | if (!devpriv->ai_neverending) |
| 322 | if (devpriv->ai_act_scan >= devpriv->ai_scans) { /* all data sampled */ |
| 323 | /* all data sampled */ |
| 324 | pcl816_ai_cancel(dev, s); |
| 325 | s->async->events |= COMEDI_CB_EOA; |
| 326 | } |
| 327 | comedi_event(dev, s); |
| 328 | return IRQ_HANDLED; |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | ============================================================================== |
| 333 | analog input dma mode 1 & 3, 816 cards |
| 334 | */ |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 335 | static void transfer_from_dma_buf(struct comedi_device * dev, struct comedi_subdevice * s, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 336 | short * ptr, unsigned int bufptr, unsigned int len) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 337 | { |
| 338 | int i; |
| 339 | |
| 340 | s->async->events = 0; |
| 341 | |
| 342 | for (i = 0; i < len; i++) { |
| 343 | |
| 344 | comedi_buf_put(s->async, ptr[bufptr++]); |
| 345 | |
| 346 | if (++devpriv->ai_act_chanlist_pos >= |
| 347 | devpriv->ai_act_chanlist_len) { |
| 348 | devpriv->ai_act_chanlist_pos = 0; |
| 349 | devpriv->ai_act_scan++; |
| 350 | } |
| 351 | |
| 352 | if (!devpriv->ai_neverending) |
| 353 | if (devpriv->ai_act_scan >= devpriv->ai_scans) { // all data sampled |
| 354 | pcl816_ai_cancel(dev, s); |
| 355 | s->async->events |= COMEDI_CB_EOA; |
| 356 | s->async->events |= COMEDI_CB_BLOCK; |
| 357 | break; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | comedi_event(dev, s); |
| 362 | } |
| 363 | |
| 364 | static irqreturn_t interrupt_pcl816_ai_mode13_dma(int irq, void *d) |
| 365 | { |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 366 | struct comedi_device *dev = d; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 367 | struct comedi_subdevice *s = dev->subdevices + 0; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 368 | int len, bufptr, this_dma_buf; |
| 369 | unsigned long dma_flags; |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 370 | short *ptr; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 371 | |
| 372 | disable_dma(devpriv->dma); |
| 373 | this_dma_buf = devpriv->next_dma_buf; |
| 374 | |
| 375 | if ((devpriv->dma_runs_to_end > -1) || devpriv->ai_neverending) { // switch dma bufs |
| 376 | |
| 377 | devpriv->next_dma_buf = 1 - devpriv->next_dma_buf; |
| 378 | set_dma_mode(devpriv->dma, DMA_MODE_READ); |
| 379 | dma_flags = claim_dma_lock(); |
| 380 | // clear_dma_ff (devpriv->dma); |
| 381 | set_dma_addr(devpriv->dma, |
| 382 | devpriv->hwdmaptr[devpriv->next_dma_buf]); |
| 383 | if (devpriv->dma_runs_to_end) { |
| 384 | set_dma_count(devpriv->dma, |
| 385 | devpriv->hwdmasize[devpriv->next_dma_buf]); |
| 386 | } else { |
| 387 | set_dma_count(devpriv->dma, devpriv->last_dma_run); |
| 388 | } |
| 389 | release_dma_lock(dma_flags); |
| 390 | enable_dma(devpriv->dma); |
| 391 | } |
| 392 | |
| 393 | devpriv->dma_runs_to_end--; |
| 394 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT request */ |
| 395 | |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 396 | ptr = (short *) devpriv->dmabuf[this_dma_buf]; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 397 | |
| 398 | len = (devpriv->hwdmasize[0] >> 1) - devpriv->ai_poll_ptr; |
| 399 | bufptr = devpriv->ai_poll_ptr; |
| 400 | devpriv->ai_poll_ptr = 0; |
| 401 | |
| 402 | transfer_from_dma_buf(dev, s, ptr, bufptr, len); |
| 403 | return IRQ_HANDLED; |
| 404 | } |
| 405 | |
| 406 | /* |
| 407 | ============================================================================== |
| 408 | INT procedure |
| 409 | */ |
| 410 | static irqreturn_t interrupt_pcl816(int irq, void *d PT_REGS_ARG) |
| 411 | { |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 412 | struct comedi_device *dev = d; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 413 | DPRINTK("<I>"); |
| 414 | |
| 415 | if (!dev->attached) { |
| 416 | comedi_error(dev, "premature interrupt"); |
| 417 | return IRQ_HANDLED; |
| 418 | } |
| 419 | |
| 420 | switch (devpriv->int816_mode) { |
| 421 | case INT_TYPE_AI1_DMA: |
| 422 | case INT_TYPE_AI3_DMA: |
| 423 | return interrupt_pcl816_ai_mode13_dma(irq, d); |
| 424 | case INT_TYPE_AI1_INT: |
| 425 | case INT_TYPE_AI3_INT: |
| 426 | return interrupt_pcl816_ai_mode13_int(irq, d); |
| 427 | } |
| 428 | |
| 429 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT request */ |
| 430 | if ((!dev->irq) | (!devpriv->irq_free) | (!devpriv->irq_blocked) | |
| 431 | (!devpriv->int816_mode)) { |
| 432 | if (devpriv->irq_was_now_closed) { |
| 433 | devpriv->irq_was_now_closed = 0; |
| 434 | // comedi_error(dev,"last IRQ.."); |
| 435 | return IRQ_HANDLED; |
| 436 | } |
| 437 | comedi_error(dev, "bad IRQ!"); |
| 438 | return IRQ_NONE; |
| 439 | } |
| 440 | comedi_error(dev, "IRQ from unknow source!"); |
| 441 | return IRQ_NONE; |
| 442 | } |
| 443 | |
| 444 | /* |
| 445 | ============================================================================== |
| 446 | COMMAND MODE |
| 447 | */ |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 448 | static void pcl816_cmdtest_out(int e, struct comedi_cmd * cmd) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 449 | { |
| 450 | rt_printk("pcl816 e=%d startsrc=%x scansrc=%x convsrc=%x\n", e, |
| 451 | cmd->start_src, cmd->scan_begin_src, cmd->convert_src); |
| 452 | rt_printk("pcl816 e=%d startarg=%d scanarg=%d convarg=%d\n", e, |
| 453 | cmd->start_arg, cmd->scan_begin_arg, cmd->convert_arg); |
| 454 | rt_printk("pcl816 e=%d stopsrc=%x scanend=%x\n", e, cmd->stop_src, |
| 455 | cmd->scan_end_src); |
| 456 | rt_printk("pcl816 e=%d stoparg=%d scanendarg=%d chanlistlen=%d\n", e, |
| 457 | cmd->stop_arg, cmd->scan_end_arg, cmd->chanlist_len); |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | ============================================================================== |
| 462 | */ |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 463 | static int pcl816_ai_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s, |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 464 | struct comedi_cmd * cmd) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 465 | { |
| 466 | int err = 0; |
| 467 | int tmp, divisor1, divisor2; |
| 468 | |
| 469 | DEBUG(rt_printk("pcl816 pcl812_ai_cmdtest\n"); |
| 470 | pcl816_cmdtest_out(-1, cmd);); |
| 471 | |
| 472 | /* step 1: make sure trigger sources are trivially valid */ |
| 473 | tmp = cmd->start_src; |
| 474 | cmd->start_src &= TRIG_NOW; |
| 475 | if (!cmd->start_src || tmp != cmd->start_src) |
| 476 | err++; |
| 477 | |
| 478 | tmp = cmd->scan_begin_src; |
| 479 | cmd->scan_begin_src &= TRIG_FOLLOW; |
| 480 | if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) |
| 481 | err++; |
| 482 | |
| 483 | if (!cmd->convert_src & (TRIG_EXT | TRIG_TIMER)) |
| 484 | err++; |
| 485 | |
| 486 | tmp = cmd->scan_end_src; |
| 487 | cmd->scan_end_src &= TRIG_COUNT; |
| 488 | if (!cmd->scan_end_src || tmp != cmd->scan_end_src) |
| 489 | err++; |
| 490 | |
| 491 | tmp = cmd->stop_src; |
| 492 | cmd->stop_src &= TRIG_COUNT | TRIG_NONE; |
| 493 | if (!cmd->stop_src || tmp != cmd->stop_src) |
| 494 | err++; |
| 495 | |
| 496 | if (err) { |
| 497 | return 1; |
| 498 | } |
| 499 | |
| 500 | /* step 2: make sure trigger sources are unique and mutually compatible */ |
| 501 | |
| 502 | if (cmd->start_src != TRIG_NOW) { |
| 503 | cmd->start_src = TRIG_NOW; |
| 504 | err++; |
| 505 | } |
| 506 | |
| 507 | if (cmd->scan_begin_src != TRIG_FOLLOW) { |
| 508 | cmd->scan_begin_src = TRIG_FOLLOW; |
| 509 | err++; |
| 510 | } |
| 511 | |
| 512 | if (cmd->convert_src != TRIG_EXT && cmd->convert_src != TRIG_TIMER) { |
| 513 | cmd->convert_src = TRIG_TIMER; |
| 514 | err++; |
| 515 | } |
| 516 | |
| 517 | if (cmd->scan_end_src != TRIG_COUNT) { |
| 518 | cmd->scan_end_src = TRIG_COUNT; |
| 519 | err++; |
| 520 | } |
| 521 | |
| 522 | if (cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_COUNT) |
| 523 | err++; |
| 524 | |
| 525 | if (err) { |
| 526 | return 2; |
| 527 | } |
| 528 | |
| 529 | /* step 3: make sure arguments are trivially compatible */ |
| 530 | if (cmd->start_arg != 0) { |
| 531 | cmd->start_arg = 0; |
| 532 | err++; |
| 533 | } |
| 534 | |
| 535 | if (cmd->scan_begin_arg != 0) { |
| 536 | cmd->scan_begin_arg = 0; |
| 537 | err++; |
| 538 | } |
| 539 | if (cmd->convert_src == TRIG_TIMER) { |
| 540 | if (cmd->convert_arg < this_board->ai_ns_min) { |
| 541 | cmd->convert_arg = this_board->ai_ns_min; |
| 542 | err++; |
| 543 | } |
| 544 | } else { /* TRIG_EXT */ |
| 545 | if (cmd->convert_arg != 0) { |
| 546 | cmd->convert_arg = 0; |
| 547 | err++; |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | if (!cmd->chanlist_len) { |
| 552 | cmd->chanlist_len = 1; |
| 553 | err++; |
| 554 | } |
| 555 | if (cmd->chanlist_len > this_board->n_aichan) { |
| 556 | cmd->chanlist_len = this_board->n_aichan; |
| 557 | err++; |
| 558 | } |
| 559 | if (cmd->scan_end_arg != cmd->chanlist_len) { |
| 560 | cmd->scan_end_arg = cmd->chanlist_len; |
| 561 | err++; |
| 562 | } |
| 563 | if (cmd->stop_src == TRIG_COUNT) { |
| 564 | if (!cmd->stop_arg) { |
| 565 | cmd->stop_arg = 1; |
| 566 | err++; |
| 567 | } |
| 568 | } else { /* TRIG_NONE */ |
| 569 | if (cmd->stop_arg != 0) { |
| 570 | cmd->stop_arg = 0; |
| 571 | err++; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | if (err) { |
| 576 | return 3; |
| 577 | } |
| 578 | |
| 579 | /* step 4: fix up any arguments */ |
| 580 | if (cmd->convert_src == TRIG_TIMER) { |
| 581 | tmp = cmd->convert_arg; |
| 582 | i8253_cascade_ns_to_timer(this_board->i8254_osc_base, |
| 583 | &divisor1, &divisor2, &cmd->convert_arg, |
| 584 | cmd->flags & TRIG_ROUND_MASK); |
| 585 | if (cmd->convert_arg < this_board->ai_ns_min) |
| 586 | cmd->convert_arg = this_board->ai_ns_min; |
| 587 | if (tmp != cmd->convert_arg) |
| 588 | err++; |
| 589 | } |
| 590 | |
| 591 | if (err) { |
| 592 | return 4; |
| 593 | } |
| 594 | |
| 595 | return 0; |
| 596 | } |
| 597 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 598 | static int pcl816_ai_cmd(struct comedi_device * dev, struct comedi_subdevice * s) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 599 | { |
| 600 | unsigned int divisor1 = 0, divisor2 = 0, dma_flags, bytes, dmairq; |
Bill Pemberton | ea6d0d4 | 2009-03-16 22:05:47 -0400 | [diff] [blame] | 601 | struct comedi_cmd *cmd = &s->async->cmd; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 602 | |
| 603 | if (cmd->start_src != TRIG_NOW) |
| 604 | return -EINVAL; |
| 605 | if (cmd->scan_begin_src != TRIG_FOLLOW) |
| 606 | return -EINVAL; |
| 607 | if (cmd->scan_end_src != TRIG_COUNT) |
| 608 | return -EINVAL; |
| 609 | if (cmd->scan_end_arg != cmd->chanlist_len) |
| 610 | return -EINVAL; |
| 611 | // if(cmd->chanlist_len>MAX_CHANLIST_LEN) return -EINVAL; |
| 612 | if (devpriv->irq_blocked) |
| 613 | return -EBUSY; |
| 614 | |
| 615 | if (cmd->convert_src == TRIG_TIMER) { |
| 616 | if (cmd->convert_arg < this_board->ai_ns_min) |
| 617 | cmd->convert_arg = this_board->ai_ns_min; |
| 618 | |
| 619 | i8253_cascade_ns_to_timer(this_board->i8254_osc_base, &divisor1, |
| 620 | &divisor2, &cmd->convert_arg, |
| 621 | cmd->flags & TRIG_ROUND_MASK); |
| 622 | if (divisor1 == 1) { // PCL816 crash if any divisor is set to 1 |
| 623 | divisor1 = 2; |
| 624 | divisor2 /= 2; |
| 625 | } |
| 626 | if (divisor2 == 1) { |
| 627 | divisor2 = 2; |
| 628 | divisor1 /= 2; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | start_pacer(dev, -1, 0, 0); // stop pacer |
| 633 | |
| 634 | if (!check_and_setup_channel_list(dev, s, cmd->chanlist, |
| 635 | cmd->chanlist_len)) |
| 636 | return -EINVAL; |
| 637 | comedi_udelay(1); |
| 638 | |
| 639 | devpriv->ai_act_scan = 0; |
| 640 | s->async->cur_chan = 0; |
| 641 | devpriv->irq_blocked = 1; |
| 642 | devpriv->ai_poll_ptr = 0; |
| 643 | devpriv->irq_was_now_closed = 0; |
| 644 | |
| 645 | if (cmd->stop_src == TRIG_COUNT) { |
| 646 | devpriv->ai_scans = cmd->stop_arg; |
| 647 | devpriv->ai_neverending = 0; |
| 648 | } else { |
| 649 | devpriv->ai_scans = 0; |
| 650 | devpriv->ai_neverending = 1; |
| 651 | } |
| 652 | |
| 653 | if ((cmd->flags & TRIG_WAKE_EOS)) { // don't we want wake up every scan? |
| 654 | printk("pl816: You wankt WAKE_EOS but I dont want handle it"); |
| 655 | // devpriv->ai_eos=1; |
| 656 | //if (devpriv->ai_n_chan==1) |
| 657 | // devpriv->dma=0; // DMA is useless for this situation |
| 658 | } |
| 659 | |
| 660 | if (devpriv->dma) { |
| 661 | bytes = devpriv->hwdmasize[0]; |
| 662 | if (!devpriv->ai_neverending) { |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 663 | bytes = s->async->cmd.chanlist_len * s->async->cmd.chanlist_len * sizeof(short); // how many |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 664 | devpriv->dma_runs_to_end = bytes / devpriv->hwdmasize[0]; // how many DMA pages we must fill |
| 665 | devpriv->last_dma_run = bytes % devpriv->hwdmasize[0]; //on last dma transfer must be moved |
| 666 | devpriv->dma_runs_to_end--; |
| 667 | if (devpriv->dma_runs_to_end >= 0) |
| 668 | bytes = devpriv->hwdmasize[0]; |
| 669 | } else |
| 670 | devpriv->dma_runs_to_end = -1; |
| 671 | |
| 672 | devpriv->next_dma_buf = 0; |
| 673 | set_dma_mode(devpriv->dma, DMA_MODE_READ); |
| 674 | dma_flags = claim_dma_lock(); |
| 675 | clear_dma_ff(devpriv->dma); |
| 676 | set_dma_addr(devpriv->dma, devpriv->hwdmaptr[0]); |
| 677 | set_dma_count(devpriv->dma, bytes); |
| 678 | release_dma_lock(dma_flags); |
| 679 | enable_dma(devpriv->dma); |
| 680 | } |
| 681 | |
| 682 | start_pacer(dev, 1, divisor1, divisor2); |
| 683 | dmairq = ((devpriv->dma & 0x3) << 4) | (dev->irq & 0x7); |
| 684 | |
| 685 | switch (cmd->convert_src) { |
| 686 | case TRIG_TIMER: |
| 687 | devpriv->int816_mode = INT_TYPE_AI1_DMA; |
| 688 | outb(0x32, dev->iobase + PCL816_CONTROL); // Pacer+IRQ+DMA |
| 689 | outb(dmairq, dev->iobase + PCL816_STATUS); // write irq and DMA to card |
| 690 | break; |
| 691 | |
| 692 | default: |
| 693 | devpriv->int816_mode = INT_TYPE_AI3_DMA; |
| 694 | outb(0x34, dev->iobase + PCL816_CONTROL); // Ext trig+IRQ+DMA |
| 695 | outb(dmairq, dev->iobase + PCL816_STATUS); // write irq to card |
| 696 | break; |
| 697 | } |
| 698 | |
| 699 | DPRINTK("pcl816 END: pcl812_ai_cmd()\n"); |
| 700 | return 0; |
| 701 | } |
| 702 | |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 703 | static int pcl816_ai_poll(struct comedi_device * dev, struct comedi_subdevice * s) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 704 | { |
| 705 | unsigned long flags; |
| 706 | unsigned int top1, top2, i; |
| 707 | |
| 708 | if (!devpriv->dma) |
| 709 | return 0; // poll is valid only for DMA transfer |
| 710 | |
| 711 | comedi_spin_lock_irqsave(&dev->spinlock, flags); |
| 712 | |
| 713 | for (i = 0; i < 20; i++) { |
| 714 | top1 = get_dma_residue(devpriv->dma); // where is now DMA |
| 715 | top2 = get_dma_residue(devpriv->dma); |
| 716 | if (top1 == top2) |
| 717 | break; |
| 718 | } |
| 719 | if (top1 != top2) { |
| 720 | comedi_spin_unlock_irqrestore(&dev->spinlock, flags); |
| 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | top1 = devpriv->hwdmasize[0] - top1; // where is now DMA in buffer |
| 725 | top1 >>= 1; // sample position |
| 726 | top2 = top1 - devpriv->ai_poll_ptr; |
| 727 | if (top2 < 1) { // no new samples |
| 728 | comedi_spin_unlock_irqrestore(&dev->spinlock, flags); |
| 729 | return 0; |
| 730 | } |
| 731 | |
| 732 | transfer_from_dma_buf(dev, s, |
Bill Pemberton | 790c554 | 2009-03-16 22:05:02 -0400 | [diff] [blame] | 733 | (short *) devpriv->dmabuf[devpriv->next_dma_buf], |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 734 | devpriv->ai_poll_ptr, top2); |
| 735 | |
| 736 | devpriv->ai_poll_ptr = top1; // new buffer position |
| 737 | comedi_spin_unlock_irqrestore(&dev->spinlock, flags); |
| 738 | |
| 739 | return s->async->buf_write_count - s->async->buf_read_count; |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | ============================================================================== |
| 744 | cancel any mode 1-4 AI |
| 745 | */ |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 746 | static int pcl816_ai_cancel(struct comedi_device * dev, struct comedi_subdevice * s) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 747 | { |
| 748 | // DEBUG(rt_printk("pcl816_ai_cancel()\n");) |
| 749 | |
| 750 | if (devpriv->irq_blocked > 0) { |
| 751 | switch (devpriv->int816_mode) { |
| 752 | #ifdef unused |
| 753 | case INT_TYPE_AI1_DMA_RTC: |
| 754 | case INT_TYPE_AI3_DMA_RTC: |
| 755 | set_rtc_irq_bit(0); // stop RTC |
| 756 | del_timer(&devpriv->rtc_irq_timer); |
| 757 | #endif |
| 758 | case INT_TYPE_AI1_DMA: |
| 759 | case INT_TYPE_AI3_DMA: |
| 760 | disable_dma(devpriv->dma); |
| 761 | case INT_TYPE_AI1_INT: |
| 762 | case INT_TYPE_AI3_INT: |
| 763 | outb(inb(dev->iobase + PCL816_CONTROL) & 0x73, dev->iobase + PCL816_CONTROL); /* Stop A/D */ |
| 764 | comedi_udelay(1); |
| 765 | outb(0, dev->iobase + PCL816_CONTROL); /* Stop A/D */ |
| 766 | outb(0xb0, dev->iobase + PCL816_CTRCTL); /* Stop pacer */ |
| 767 | outb(0x70, dev->iobase + PCL816_CTRCTL); |
| 768 | outb(0, dev->iobase + PCL816_AD_LO); |
| 769 | inb(dev->iobase + PCL816_AD_LO); |
| 770 | inb(dev->iobase + PCL816_AD_HI); |
| 771 | outb(0, dev->iobase + PCL816_CLRINT); /* clear INT request */ |
| 772 | outb(0, dev->iobase + PCL816_CONTROL); /* Stop A/D */ |
| 773 | devpriv->irq_blocked = 0; |
| 774 | devpriv->irq_was_now_closed = devpriv->int816_mode; |
| 775 | devpriv->int816_mode = 0; |
| 776 | devpriv->last_int_sub = s; |
| 777 | // s->busy = 0; |
| 778 | break; |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | DEBUG(rt_printk("comedi: pcl816_ai_cancel() successful\n"); |
| 783 | ) |
| 784 | return 0; |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | ============================================================================== |
| 789 | chech for PCL816 |
| 790 | */ |
| 791 | static int pcl816_check(unsigned long iobase) |
| 792 | { |
| 793 | outb(0x00, iobase + PCL816_MUX); |
| 794 | comedi_udelay(1); |
| 795 | if (inb(iobase + PCL816_MUX) != 0x00) |
| 796 | return 1; //there isn't card |
| 797 | outb(0x55, iobase + PCL816_MUX); |
| 798 | comedi_udelay(1); |
| 799 | if (inb(iobase + PCL816_MUX) != 0x55) |
| 800 | return 1; //there isn't card |
| 801 | outb(0x00, iobase + PCL816_MUX); |
| 802 | comedi_udelay(1); |
| 803 | outb(0x18, iobase + PCL816_CONTROL); |
| 804 | comedi_udelay(1); |
| 805 | if (inb(iobase + PCL816_CONTROL) != 0x18) |
| 806 | return 1; //there isn't card |
| 807 | return 0; // ok, card exist |
| 808 | } |
| 809 | |
| 810 | /* |
| 811 | ============================================================================== |
| 812 | reset whole PCL-816 cards |
| 813 | */ |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 814 | static void pcl816_reset(struct comedi_device * dev) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 815 | { |
| 816 | // outb (0, dev->iobase + PCL818_DA_LO); // DAC=0V |
| 817 | // outb (0, dev->iobase + PCL818_DA_HI); |
| 818 | // comedi_udelay (1); |
| 819 | // outb (0, dev->iobase + PCL818_DO_HI); // DO=$0000 |
| 820 | // outb (0, dev->iobase + PCL818_DO_LO); |
| 821 | // comedi_udelay (1); |
| 822 | outb(0, dev->iobase + PCL816_CONTROL); |
| 823 | outb(0, dev->iobase + PCL816_MUX); |
| 824 | outb(0, dev->iobase + PCL816_CLRINT); |
| 825 | outb(0xb0, dev->iobase + PCL816_CTRCTL); /* Stop pacer */ |
| 826 | outb(0x70, dev->iobase + PCL816_CTRCTL); |
| 827 | outb(0x30, dev->iobase + PCL816_CTRCTL); |
| 828 | outb(0, dev->iobase + PCL816_RANGE); |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | ============================================================================== |
| 833 | Start/stop pacer onboard pacer |
| 834 | */ |
| 835 | static void |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 836 | start_pacer(struct comedi_device * dev, int mode, unsigned int divisor1, |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 837 | unsigned int divisor2) |
| 838 | { |
| 839 | outb(0x32, dev->iobase + PCL816_CTRCTL); |
| 840 | outb(0xff, dev->iobase + PCL816_CTR0); |
| 841 | outb(0x00, dev->iobase + PCL816_CTR0); |
| 842 | comedi_udelay(1); |
| 843 | outb(0xb4, dev->iobase + PCL816_CTRCTL); // set counter 2 as mode 3 |
| 844 | outb(0x74, dev->iobase + PCL816_CTRCTL); // set counter 1 as mode 3 |
| 845 | comedi_udelay(1); |
| 846 | |
| 847 | if (mode == 1) { |
| 848 | DPRINTK("mode %d, divisor1 %d, divisor2 %d\n", mode, divisor1, |
| 849 | divisor2); |
| 850 | outb(divisor2 & 0xff, dev->iobase + PCL816_CTR2); |
| 851 | outb((divisor2 >> 8) & 0xff, dev->iobase + PCL816_CTR2); |
| 852 | outb(divisor1 & 0xff, dev->iobase + PCL816_CTR1); |
| 853 | outb((divisor1 >> 8) & 0xff, dev->iobase + PCL816_CTR1); |
| 854 | } |
| 855 | |
| 856 | /* clear pending interrupts (just in case) */ |
| 857 | // outb(0, dev->iobase + PCL816_CLRINT); |
| 858 | } |
| 859 | |
| 860 | /* |
| 861 | ============================================================================== |
| 862 | Check if channel list from user is builded correctly |
| 863 | If it's ok, then program scan/gain logic |
| 864 | */ |
| 865 | static int |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 866 | check_and_setup_channel_list(struct comedi_device * dev, struct comedi_subdevice * s, |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 867 | unsigned int *chanlist, int chanlen) |
| 868 | { |
| 869 | unsigned int chansegment[16]; |
| 870 | unsigned int i, nowmustbechan, seglen, segpos; |
| 871 | |
| 872 | // correct channel and range number check itself comedi/range.c |
| 873 | if (chanlen < 1) { |
| 874 | comedi_error(dev, "range/channel list is empty!"); |
| 875 | return 0; |
| 876 | } |
| 877 | |
| 878 | if (chanlen > 1) { |
| 879 | chansegment[0] = chanlist[0]; // first channel is everytime ok |
| 880 | for (i = 1, seglen = 1; i < chanlen; i++, seglen++) { |
| 881 | // build part of chanlist |
| 882 | DEBUG(rt_printk("%d. %d %d\n", i, CR_CHAN(chanlist[i]), |
| 883 | CR_RANGE(chanlist[i])); |
| 884 | ) |
| 885 | if (chanlist[0] == chanlist[i]) |
| 886 | break; // we detect loop, this must by finish |
| 887 | nowmustbechan = |
| 888 | (CR_CHAN(chansegment[i - 1]) + 1) % chanlen; |
| 889 | if (nowmustbechan != CR_CHAN(chanlist[i])) { |
| 890 | // channel list isn't continous :-( |
| 891 | rt_printk |
| 892 | ("comedi%d: pcl816: channel list must be continous! chanlist[%i]=%d but must be %d or %d!\n", |
| 893 | dev->minor, i, CR_CHAN(chanlist[i]), |
| 894 | nowmustbechan, CR_CHAN(chanlist[0])); |
| 895 | return 0; |
| 896 | } |
| 897 | chansegment[i] = chanlist[i]; // well, this is next correct channel in list |
| 898 | } |
| 899 | |
| 900 | for (i = 0, segpos = 0; i < chanlen; i++) { // check whole chanlist |
| 901 | DEBUG(rt_printk("%d %d=%d %d\n", |
| 902 | CR_CHAN(chansegment[i % seglen]), |
| 903 | CR_RANGE(chansegment[i % seglen]), |
| 904 | CR_CHAN(chanlist[i]), |
| 905 | CR_RANGE(chanlist[i])); |
| 906 | ) |
| 907 | if (chanlist[i] != chansegment[i % seglen]) { |
| 908 | rt_printk |
| 909 | ("comedi%d: pcl816: bad channel or range number! chanlist[%i]=%d,%d,%d and not %d,%d,%d!\n", |
| 910 | dev->minor, i, CR_CHAN(chansegment[i]), |
| 911 | CR_RANGE(chansegment[i]), |
| 912 | CR_AREF(chansegment[i]), |
| 913 | CR_CHAN(chanlist[i % seglen]), |
| 914 | CR_RANGE(chanlist[i % seglen]), |
| 915 | CR_AREF(chansegment[i % seglen])); |
| 916 | return 0; // chan/gain list is strange |
| 917 | } |
| 918 | } |
| 919 | } else { |
| 920 | seglen = 1; |
| 921 | } |
| 922 | |
| 923 | devpriv->ai_act_chanlist_len = seglen; |
| 924 | devpriv->ai_act_chanlist_pos = 0; |
| 925 | |
| 926 | for (i = 0; i < seglen; i++) { // store range list to card |
| 927 | devpriv->ai_act_chanlist[i] = CR_CHAN(chanlist[i]); |
| 928 | outb(CR_CHAN(chanlist[0]) & 0xf, dev->iobase + PCL816_MUX); |
| 929 | outb(CR_RANGE(chanlist[0]), dev->iobase + PCL816_RANGE); /* select gain */ |
| 930 | } |
| 931 | |
| 932 | comedi_udelay(1); |
| 933 | |
| 934 | outb(devpriv->ai_act_chanlist[0] | (devpriv->ai_act_chanlist[seglen - 1] << 4), dev->iobase + PCL816_MUX); /* select channel interval to scan */ |
| 935 | |
| 936 | return 1; // we can serve this with MUX logic |
| 937 | } |
| 938 | |
| 939 | #ifdef unused |
| 940 | /* |
| 941 | ============================================================================== |
| 942 | Enable(1)/disable(0) periodic interrupts from RTC |
| 943 | */ |
| 944 | static int set_rtc_irq_bit(unsigned char bit) |
| 945 | { |
| 946 | unsigned char val; |
| 947 | unsigned long flags; |
| 948 | |
| 949 | if (bit == 1) { |
| 950 | RTC_timer_lock++; |
| 951 | if (RTC_timer_lock > 1) |
| 952 | return 0; |
| 953 | } else { |
| 954 | RTC_timer_lock--; |
| 955 | if (RTC_timer_lock < 0) |
| 956 | RTC_timer_lock = 0; |
| 957 | if (RTC_timer_lock > 0) |
| 958 | return 0; |
| 959 | } |
| 960 | |
| 961 | save_flags(flags); |
| 962 | cli(); |
| 963 | val = CMOS_READ(RTC_CONTROL); |
| 964 | if (bit) { |
| 965 | val |= RTC_PIE; |
| 966 | } else { |
| 967 | val &= ~RTC_PIE; |
| 968 | } |
| 969 | CMOS_WRITE(val, RTC_CONTROL); |
| 970 | CMOS_READ(RTC_INTR_FLAGS); |
| 971 | restore_flags(flags); |
| 972 | return 0; |
| 973 | } |
| 974 | #endif |
| 975 | |
| 976 | /* |
| 977 | ============================================================================== |
| 978 | Free any resources that we have claimed |
| 979 | */ |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 980 | static void free_resources(struct comedi_device * dev) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 981 | { |
| 982 | //rt_printk("free_resource()\n"); |
| 983 | if (dev->private) { |
| 984 | pcl816_ai_cancel(dev, devpriv->sub_ai); |
| 985 | pcl816_reset(dev); |
| 986 | if (devpriv->dma) |
| 987 | free_dma(devpriv->dma); |
| 988 | if (devpriv->dmabuf[0]) |
| 989 | free_pages(devpriv->dmabuf[0], devpriv->dmapages[0]); |
| 990 | if (devpriv->dmabuf[1]) |
| 991 | free_pages(devpriv->dmabuf[1], devpriv->dmapages[1]); |
| 992 | #ifdef unused |
| 993 | if (devpriv->rtc_irq) |
| 994 | comedi_free_irq(devpriv->rtc_irq, dev); |
| 995 | if ((devpriv->dma_rtc) && (RTC_lock == 1)) { |
| 996 | if (devpriv->rtc_iobase) |
| 997 | release_region(devpriv->rtc_iobase, |
| 998 | devpriv->rtc_iosize); |
| 999 | } |
| 1000 | #endif |
| 1001 | } |
| 1002 | |
| 1003 | if (dev->irq) |
| 1004 | free_irq(dev->irq, dev); |
| 1005 | if (dev->iobase) |
| 1006 | release_region(dev->iobase, this_board->io_range); |
| 1007 | //rt_printk("free_resource() end\n"); |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | ============================================================================== |
| 1012 | |
| 1013 | Initialization |
| 1014 | |
| 1015 | */ |
Bill Pemberton | 0707bb0 | 2009-03-16 22:06:20 -0400 | [diff] [blame] | 1016 | static int pcl816_attach(struct comedi_device * dev, struct comedi_devconfig * it) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 1017 | { |
| 1018 | int ret; |
| 1019 | unsigned long iobase; |
| 1020 | unsigned int irq, dma; |
| 1021 | unsigned long pages; |
| 1022 | //int i; |
Bill Pemberton | 34c4392 | 2009-03-16 22:05:14 -0400 | [diff] [blame] | 1023 | struct comedi_subdevice *s; |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 1024 | |
| 1025 | /* claim our I/O space */ |
| 1026 | iobase = it->options[0]; |
| 1027 | printk("comedi%d: pcl816: board=%s, ioport=0x%03lx", dev->minor, |
| 1028 | this_board->name, iobase); |
| 1029 | |
| 1030 | if (!request_region(iobase, this_board->io_range, "pcl816")) { |
| 1031 | rt_printk("I/O port conflict\n"); |
| 1032 | return -EIO; |
| 1033 | } |
| 1034 | |
| 1035 | dev->iobase = iobase; |
| 1036 | |
| 1037 | if (pcl816_check(iobase)) { |
| 1038 | rt_printk(", I cann't detect board. FAIL!\n"); |
| 1039 | return -EIO; |
| 1040 | } |
| 1041 | |
Bill Pemberton | fe0ff17 | 2009-03-16 22:18:43 -0400 | [diff] [blame^] | 1042 | if ((ret = alloc_private(dev, sizeof(struct pcl816_private))) < 0) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 1043 | return ret; /* Can't alloc mem */ |
| 1044 | |
| 1045 | /* set up some name stuff */ |
| 1046 | dev->board_name = this_board->name; |
| 1047 | |
| 1048 | /* grab our IRQ */ |
| 1049 | irq = 0; |
| 1050 | if (this_board->IRQbits != 0) { /* board support IRQ */ |
| 1051 | irq = it->options[1]; |
| 1052 | if (irq) { /* we want to use IRQ */ |
| 1053 | if (((1 << irq) & this_board->IRQbits) == 0) { |
| 1054 | rt_printk |
| 1055 | (", IRQ %u is out of allowed range, DISABLING IT", |
| 1056 | irq); |
| 1057 | irq = 0; /* Bad IRQ */ |
| 1058 | } else { |
| 1059 | if (comedi_request_irq(irq, interrupt_pcl816, 0, |
| 1060 | "pcl816", dev)) { |
| 1061 | rt_printk |
| 1062 | (", unable to allocate IRQ %u, DISABLING IT", |
| 1063 | irq); |
| 1064 | irq = 0; /* Can't use IRQ */ |
| 1065 | } else { |
| 1066 | rt_printk(", irq=%u", irq); |
| 1067 | } |
| 1068 | } |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | dev->irq = irq; |
| 1073 | if (irq) { |
| 1074 | devpriv->irq_free = 1; |
| 1075 | } /* 1=we have allocated irq */ |
| 1076 | else { |
| 1077 | devpriv->irq_free = 0; |
| 1078 | } |
| 1079 | devpriv->irq_blocked = 0; /* number of subdevice which use IRQ */ |
| 1080 | devpriv->int816_mode = 0; /* mode of irq */ |
| 1081 | |
| 1082 | #ifdef unused |
| 1083 | /* grab RTC for DMA operations */ |
| 1084 | devpriv->dma_rtc = 0; |
| 1085 | if (it->options[2] > 0) { // we want to use DMA |
| 1086 | if (RTC_lock == 0) { |
| 1087 | if (!request_region(RTC_PORT(0), RTC_IO_EXTENT, |
| 1088 | "pcl816 (RTC)")) |
| 1089 | goto no_rtc; |
| 1090 | } |
| 1091 | devpriv->rtc_iobase = RTC_PORT(0); |
| 1092 | devpriv->rtc_iosize = RTC_IO_EXTENT; |
| 1093 | RTC_lock++; |
| 1094 | #ifdef UNTESTED_CODE |
| 1095 | if (!comedi_request_irq(RTC_IRQ, |
| 1096 | interrupt_pcl816_ai_mode13_dma_rtc, 0, |
| 1097 | "pcl816 DMA (RTC)", dev)) { |
| 1098 | devpriv->dma_rtc = 1; |
| 1099 | devpriv->rtc_irq = RTC_IRQ; |
| 1100 | rt_printk(", dma_irq=%u", devpriv->rtc_irq); |
| 1101 | } else { |
| 1102 | RTC_lock--; |
| 1103 | if (RTC_lock == 0) { |
| 1104 | if (devpriv->rtc_iobase) |
| 1105 | release_region(devpriv->rtc_iobase, |
| 1106 | devpriv->rtc_iosize); |
| 1107 | } |
| 1108 | devpriv->rtc_iobase = 0; |
| 1109 | devpriv->rtc_iosize = 0; |
| 1110 | } |
| 1111 | #else |
| 1112 | printk("pcl816: RTC code missing"); |
| 1113 | #endif |
| 1114 | |
| 1115 | } |
| 1116 | |
| 1117 | no_rtc: |
| 1118 | #endif |
| 1119 | /* grab our DMA */ |
| 1120 | dma = 0; |
| 1121 | devpriv->dma = dma; |
| 1122 | if ((devpriv->irq_free == 0) && (devpriv->dma_rtc == 0)) |
| 1123 | goto no_dma; /* if we haven't IRQ, we can't use DMA */ |
| 1124 | |
| 1125 | if (this_board->DMAbits != 0) { /* board support DMA */ |
| 1126 | dma = it->options[2]; |
| 1127 | if (dma < 1) |
| 1128 | goto no_dma; /* DMA disabled */ |
| 1129 | |
| 1130 | if (((1 << dma) & this_board->DMAbits) == 0) { |
| 1131 | rt_printk(", DMA is out of allowed range, FAIL!\n"); |
| 1132 | return -EINVAL; /* Bad DMA */ |
| 1133 | } |
| 1134 | ret = request_dma(dma, "pcl816"); |
| 1135 | if (ret) { |
| 1136 | rt_printk(", unable to allocate DMA %u, FAIL!\n", dma); |
| 1137 | return -EBUSY; /* DMA isn't free */ |
| 1138 | } |
| 1139 | |
| 1140 | devpriv->dma = dma; |
| 1141 | rt_printk(", dma=%u", dma); |
| 1142 | pages = 2; /* we need 16KB */ |
| 1143 | devpriv->dmabuf[0] = __get_dma_pages(GFP_KERNEL, pages); |
| 1144 | |
| 1145 | if (!devpriv->dmabuf[0]) { |
| 1146 | rt_printk(", unable to allocate DMA buffer, FAIL!\n"); |
| 1147 | /* maybe experiment with try_to_free_pages() will help .... */ |
| 1148 | return -EBUSY; /* no buffer :-( */ |
| 1149 | } |
| 1150 | devpriv->dmapages[0] = pages; |
| 1151 | devpriv->hwdmaptr[0] = virt_to_bus((void *)devpriv->dmabuf[0]); |
| 1152 | devpriv->hwdmasize[0] = (1 << pages) * PAGE_SIZE; |
| 1153 | //rt_printk("%d %d %ld, ",devpriv->dmapages[0],devpriv->hwdmasize[0],PAGE_SIZE); |
| 1154 | |
| 1155 | if (devpriv->dma_rtc == 0) { // we must do duble buff :-( |
| 1156 | devpriv->dmabuf[1] = __get_dma_pages(GFP_KERNEL, pages); |
| 1157 | if (!devpriv->dmabuf[1]) { |
| 1158 | rt_printk |
| 1159 | (", unable to allocate DMA buffer, FAIL!\n"); |
| 1160 | return -EBUSY; |
| 1161 | } |
| 1162 | devpriv->dmapages[1] = pages; |
| 1163 | devpriv->hwdmaptr[1] = |
| 1164 | virt_to_bus((void *)devpriv->dmabuf[1]); |
| 1165 | devpriv->hwdmasize[1] = (1 << pages) * PAGE_SIZE; |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | no_dma: |
| 1170 | |
| 1171 | /* if (this_board->n_aochan > 0) |
| 1172 | subdevs[1] = COMEDI_SUBD_AO; |
| 1173 | if (this_board->n_dichan > 0) |
| 1174 | subdevs[2] = COMEDI_SUBD_DI; |
| 1175 | if (this_board->n_dochan > 0) |
| 1176 | subdevs[3] = COMEDI_SUBD_DO; |
| 1177 | */ |
| 1178 | if ((ret = alloc_subdevices(dev, 1)) < 0) |
| 1179 | return ret; |
| 1180 | |
| 1181 | s = dev->subdevices + 0; |
| 1182 | if (this_board->n_aichan > 0) { |
| 1183 | s->type = COMEDI_SUBD_AI; |
| 1184 | devpriv->sub_ai = s; |
| 1185 | dev->read_subdev = s; |
| 1186 | s->subdev_flags = SDF_READABLE | SDF_CMD_READ; |
| 1187 | s->n_chan = this_board->n_aichan; |
| 1188 | s->subdev_flags |= SDF_DIFF; |
| 1189 | //printk (", %dchans DIFF DAC - %d", s->n_chan, i); |
| 1190 | s->maxdata = this_board->ai_maxdata; |
| 1191 | s->len_chanlist = this_board->ai_chanlist; |
| 1192 | s->range_table = this_board->ai_range_type; |
| 1193 | s->cancel = pcl816_ai_cancel; |
| 1194 | s->do_cmdtest = pcl816_ai_cmdtest; |
| 1195 | s->do_cmd = pcl816_ai_cmd; |
| 1196 | s->poll = pcl816_ai_poll; |
| 1197 | s->insn_read = pcl816_ai_insn_read; |
| 1198 | } else { |
| 1199 | s->type = COMEDI_SUBD_UNUSED; |
| 1200 | } |
| 1201 | |
| 1202 | #if 0 |
| 1203 | case COMEDI_SUBD_AO: |
| 1204 | s->subdev_flags = SDF_WRITABLE | SDF_GROUND; |
| 1205 | s->n_chan = this_board->n_aochan; |
| 1206 | s->maxdata = this_board->ao_maxdata; |
| 1207 | s->len_chanlist = this_board->ao_chanlist; |
| 1208 | s->range_table = this_board->ao_range_type; |
| 1209 | break; |
| 1210 | |
| 1211 | case COMEDI_SUBD_DI: |
| 1212 | s->subdev_flags = SDF_READABLE; |
| 1213 | s->n_chan = this_board->n_dichan; |
| 1214 | s->maxdata = 1; |
| 1215 | s->len_chanlist = this_board->n_dichan; |
| 1216 | s->range_table = &range_digital; |
| 1217 | break; |
| 1218 | |
| 1219 | case COMEDI_SUBD_DO: |
| 1220 | s->subdev_flags = SDF_WRITABLE; |
| 1221 | s->n_chan = this_board->n_dochan; |
| 1222 | s->maxdata = 1; |
| 1223 | s->len_chanlist = this_board->n_dochan; |
| 1224 | s->range_table = &range_digital; |
| 1225 | break; |
| 1226 | #endif |
| 1227 | |
| 1228 | pcl816_reset(dev); |
| 1229 | |
| 1230 | rt_printk("\n"); |
| 1231 | |
| 1232 | return 0; |
| 1233 | } |
| 1234 | |
| 1235 | /* |
| 1236 | ============================================================================== |
| 1237 | Removes device |
| 1238 | */ |
Bill Pemberton | 71b5f4f | 2009-03-16 22:05:08 -0400 | [diff] [blame] | 1239 | static int pcl816_detach(struct comedi_device * dev) |
Juan Grigera | dd2996b | 2009-02-19 09:30:57 -0800 | [diff] [blame] | 1240 | { |
| 1241 | DEBUG(rt_printk("comedi%d: pcl816: remove\n", dev->minor); |
| 1242 | ) |
| 1243 | free_resources(dev); |
| 1244 | #ifdef unused |
| 1245 | if (devpriv->dma_rtc) |
| 1246 | RTC_lock--; |
| 1247 | #endif |
| 1248 | return 0; |
| 1249 | } |