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[mirror_ubuntu-zesty-kernel.git] / drivers / net / irda / pxaficp_ir.c
1 /*
2 * linux/drivers/net/irda/pxaficp_ir.c
3 *
4 * Based on sa1100_ir.c by Russell King
5 *
6 * Changes copyright (C) 2003-2005 MontaVista Software, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Infra-red driver (SIR/FIR) for the PXA2xx embedded microprocessor
13 *
14 */
15 #include <linux/module.h>
16 #include <linux/netdevice.h>
17 #include <linux/platform_device.h>
18 #include <linux/clk.h>
19
20 #include <net/irda/irda.h>
21 #include <net/irda/irmod.h>
22 #include <net/irda/wrapper.h>
23 #include <net/irda/irda_device.h>
24
25 #include <asm/dma.h>
26 #include <mach/irda.h>
27 #include <mach/pxa-regs.h>
28
29 #define IrSR_RXPL_NEG_IS_ZERO (1<<4)
30 #define IrSR_RXPL_POS_IS_ZERO 0x0
31 #define IrSR_TXPL_NEG_IS_ZERO (1<<3)
32 #define IrSR_TXPL_POS_IS_ZERO 0x0
33 #define IrSR_XMODE_PULSE_1_6 (1<<2)
34 #define IrSR_XMODE_PULSE_3_16 0x0
35 #define IrSR_RCVEIR_IR_MODE (1<<1)
36 #define IrSR_RCVEIR_UART_MODE 0x0
37 #define IrSR_XMITIR_IR_MODE (1<<0)
38 #define IrSR_XMITIR_UART_MODE 0x0
39
40 #define IrSR_IR_RECEIVE_ON (\
41 IrSR_RXPL_NEG_IS_ZERO | \
42 IrSR_TXPL_POS_IS_ZERO | \
43 IrSR_XMODE_PULSE_3_16 | \
44 IrSR_RCVEIR_IR_MODE | \
45 IrSR_XMITIR_UART_MODE)
46
47 #define IrSR_IR_TRANSMIT_ON (\
48 IrSR_RXPL_NEG_IS_ZERO | \
49 IrSR_TXPL_POS_IS_ZERO | \
50 IrSR_XMODE_PULSE_3_16 | \
51 IrSR_RCVEIR_UART_MODE | \
52 IrSR_XMITIR_IR_MODE)
53
54 struct pxa_irda {
55 int speed;
56 int newspeed;
57 unsigned long last_oscr;
58
59 unsigned char *dma_rx_buff;
60 unsigned char *dma_tx_buff;
61 dma_addr_t dma_rx_buff_phy;
62 dma_addr_t dma_tx_buff_phy;
63 unsigned int dma_tx_buff_len;
64 int txdma;
65 int rxdma;
66
67 struct net_device_stats stats;
68 struct irlap_cb *irlap;
69 struct qos_info qos;
70
71 iobuff_t tx_buff;
72 iobuff_t rx_buff;
73
74 struct device *dev;
75 struct pxaficp_platform_data *pdata;
76 struct clk *fir_clk;
77 struct clk *sir_clk;
78 struct clk *cur_clk;
79 };
80
81 static inline void pxa_irda_disable_clk(struct pxa_irda *si)
82 {
83 if (si->cur_clk)
84 clk_disable(si->cur_clk);
85 si->cur_clk = NULL;
86 }
87
88 static inline void pxa_irda_enable_firclk(struct pxa_irda *si)
89 {
90 si->cur_clk = si->fir_clk;
91 clk_enable(si->fir_clk);
92 }
93
94 static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)
95 {
96 si->cur_clk = si->sir_clk;
97 clk_enable(si->sir_clk);
98 }
99
100
101 #define IS_FIR(si) ((si)->speed >= 4000000)
102 #define IRDA_FRAME_SIZE_LIMIT 2047
103
104 inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
105 {
106 DCSR(si->rxdma) = DCSR_NODESC;
107 DSADR(si->rxdma) = __PREG(ICDR);
108 DTADR(si->rxdma) = si->dma_rx_buff_phy;
109 DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT;
110 DCSR(si->rxdma) |= DCSR_RUN;
111 }
112
113 inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
114 {
115 DCSR(si->txdma) = DCSR_NODESC;
116 DSADR(si->txdma) = si->dma_tx_buff_phy;
117 DTADR(si->txdma) = __PREG(ICDR);
118 DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len;
119 DCSR(si->txdma) |= DCSR_RUN;
120 }
121
122 /*
123 * Set the IrDA communications speed.
124 */
125 static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
126 {
127 unsigned long flags;
128 unsigned int divisor;
129
130 switch (speed) {
131 case 9600: case 19200: case 38400:
132 case 57600: case 115200:
133
134 /* refer to PXA250/210 Developer's Manual 10-7 */
135 /* BaudRate = 14.7456 MHz / (16*Divisor) */
136 divisor = 14745600 / (16 * speed);
137
138 local_irq_save(flags);
139
140 if (IS_FIR(si)) {
141 /* stop RX DMA */
142 DCSR(si->rxdma) &= ~DCSR_RUN;
143 /* disable FICP */
144 ICCR0 = 0;
145 pxa_irda_disable_clk(si);
146
147 /* set board transceiver to SIR mode */
148 si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
149
150 /* enable the STUART clock */
151 pxa_irda_enable_sirclk(si);
152 }
153
154 /* disable STUART first */
155 STIER = 0;
156
157 /* access DLL & DLH */
158 STLCR |= LCR_DLAB;
159 STDLL = divisor & 0xff;
160 STDLH = divisor >> 8;
161 STLCR &= ~LCR_DLAB;
162
163 si->speed = speed;
164 STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
165 STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
166
167 local_irq_restore(flags);
168 break;
169
170 case 4000000:
171 local_irq_save(flags);
172
173 /* disable STUART */
174 STIER = 0;
175 STISR = 0;
176 pxa_irda_disable_clk(si);
177
178 /* disable FICP first */
179 ICCR0 = 0;
180
181 /* set board transceiver to FIR mode */
182 si->pdata->transceiver_mode(si->dev, IR_FIRMODE);
183
184 /* enable the FICP clock */
185 pxa_irda_enable_firclk(si);
186
187 si->speed = speed;
188 pxa_irda_fir_dma_rx_start(si);
189 ICCR0 = ICCR0_ITR | ICCR0_RXE;
190
191 local_irq_restore(flags);
192 break;
193
194 default:
195 return -EINVAL;
196 }
197
198 return 0;
199 }
200
201 /* SIR interrupt service routine. */
202 static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
203 {
204 struct net_device *dev = dev_id;
205 struct pxa_irda *si = netdev_priv(dev);
206 int iir, lsr, data;
207
208 iir = STIIR;
209
210 switch (iir & 0x0F) {
211 case 0x06: /* Receiver Line Status */
212 lsr = STLSR;
213 while (lsr & LSR_FIFOE) {
214 data = STRBR;
215 if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) {
216 printk(KERN_DEBUG "pxa_ir: sir receiving error\n");
217 si->stats.rx_errors++;
218 if (lsr & LSR_FE)
219 si->stats.rx_frame_errors++;
220 if (lsr & LSR_OE)
221 si->stats.rx_fifo_errors++;
222 } else {
223 si->stats.rx_bytes++;
224 async_unwrap_char(dev, &si->stats, &si->rx_buff, data);
225 }
226 lsr = STLSR;
227 }
228 dev->last_rx = jiffies;
229 si->last_oscr = OSCR;
230 break;
231
232 case 0x04: /* Received Data Available */
233 /* forth through */
234
235 case 0x0C: /* Character Timeout Indication */
236 do {
237 si->stats.rx_bytes++;
238 async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR);
239 } while (STLSR & LSR_DR);
240 dev->last_rx = jiffies;
241 si->last_oscr = OSCR;
242 break;
243
244 case 0x02: /* Transmit FIFO Data Request */
245 while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) {
246 STTHR = *si->tx_buff.data++;
247 si->tx_buff.len -= 1;
248 }
249
250 if (si->tx_buff.len == 0) {
251 si->stats.tx_packets++;
252 si->stats.tx_bytes += si->tx_buff.data -
253 si->tx_buff.head;
254
255 /* We need to ensure that the transmitter has finished. */
256 while ((STLSR & LSR_TEMT) == 0)
257 cpu_relax();
258 si->last_oscr = OSCR;
259
260 /*
261 * Ok, we've finished transmitting. Now enable
262 * the receiver. Sometimes we get a receive IRQ
263 * immediately after a transmit...
264 */
265 if (si->newspeed) {
266 pxa_irda_set_speed(si, si->newspeed);
267 si->newspeed = 0;
268 } else {
269 /* enable IR Receiver, disable IR Transmitter */
270 STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
271 /* enable STUART and receive interrupts */
272 STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
273 }
274 /* I'm hungry! */
275 netif_wake_queue(dev);
276 }
277 break;
278 }
279
280 return IRQ_HANDLED;
281 }
282
283 /* FIR Receive DMA interrupt handler */
284 static void pxa_irda_fir_dma_rx_irq(int channel, void *data)
285 {
286 int dcsr = DCSR(channel);
287
288 DCSR(channel) = dcsr & ~DCSR_RUN;
289
290 printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr);
291 }
292
293 /* FIR Transmit DMA interrupt handler */
294 static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
295 {
296 struct net_device *dev = data;
297 struct pxa_irda *si = netdev_priv(dev);
298 int dcsr;
299
300 dcsr = DCSR(channel);
301 DCSR(channel) = dcsr & ~DCSR_RUN;
302
303 if (dcsr & DCSR_ENDINTR) {
304 si->stats.tx_packets++;
305 si->stats.tx_bytes += si->dma_tx_buff_len;
306 } else {
307 si->stats.tx_errors++;
308 }
309
310 while (ICSR1 & ICSR1_TBY)
311 cpu_relax();
312 si->last_oscr = OSCR;
313
314 /*
315 * HACK: It looks like the TBY bit is dropped too soon.
316 * Without this delay things break.
317 */
318 udelay(120);
319
320 if (si->newspeed) {
321 pxa_irda_set_speed(si, si->newspeed);
322 si->newspeed = 0;
323 } else {
324 int i = 64;
325
326 ICCR0 = 0;
327 pxa_irda_fir_dma_rx_start(si);
328 while ((ICSR1 & ICSR1_RNE) && i--)
329 (void)ICDR;
330 ICCR0 = ICCR0_ITR | ICCR0_RXE;
331
332 if (i < 0)
333 printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
334 }
335 netif_wake_queue(dev);
336 }
337
338 /* EIF(Error in FIFO/End in Frame) handler for FIR */
339 static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0)
340 {
341 unsigned int len, stat, data;
342
343 /* Get the current data position. */
344 len = DTADR(si->rxdma) - si->dma_rx_buff_phy;
345
346 do {
347 /* Read Status, and then Data. */
348 stat = ICSR1;
349 rmb();
350 data = ICDR;
351
352 if (stat & (ICSR1_CRE | ICSR1_ROR)) {
353 si->stats.rx_errors++;
354 if (stat & ICSR1_CRE) {
355 printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n");
356 si->stats.rx_crc_errors++;
357 }
358 if (stat & ICSR1_ROR) {
359 printk(KERN_DEBUG "pxa_ir: fir receive overrun\n");
360 si->stats.rx_over_errors++;
361 }
362 } else {
363 si->dma_rx_buff[len++] = data;
364 }
365 /* If we hit the end of frame, there's no point in continuing. */
366 if (stat & ICSR1_EOF)
367 break;
368 } while (ICSR0 & ICSR0_EIF);
369
370 if (stat & ICSR1_EOF) {
371 /* end of frame. */
372 struct sk_buff *skb;
373
374 if (icsr0 & ICSR0_FRE) {
375 printk(KERN_ERR "pxa_ir: dropping erroneous frame\n");
376 si->stats.rx_dropped++;
377 return;
378 }
379
380 skb = alloc_skb(len+1,GFP_ATOMIC);
381 if (!skb) {
382 printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n");
383 si->stats.rx_dropped++;
384 return;
385 }
386
387 /* Align IP header to 20 bytes */
388 skb_reserve(skb, 1);
389 skb_copy_to_linear_data(skb, si->dma_rx_buff, len);
390 skb_put(skb, len);
391
392 /* Feed it to IrLAP */
393 skb->dev = dev;
394 skb_reset_mac_header(skb);
395 skb->protocol = htons(ETH_P_IRDA);
396 netif_rx(skb);
397
398 si->stats.rx_packets++;
399 si->stats.rx_bytes += len;
400
401 dev->last_rx = jiffies;
402 }
403 }
404
405 /* FIR interrupt handler */
406 static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id)
407 {
408 struct net_device *dev = dev_id;
409 struct pxa_irda *si = netdev_priv(dev);
410 int icsr0, i = 64;
411
412 /* stop RX DMA */
413 DCSR(si->rxdma) &= ~DCSR_RUN;
414 si->last_oscr = OSCR;
415 icsr0 = ICSR0;
416
417 if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) {
418 if (icsr0 & ICSR0_FRE) {
419 printk(KERN_DEBUG "pxa_ir: fir receive frame error\n");
420 si->stats.rx_frame_errors++;
421 } else {
422 printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
423 si->stats.rx_errors++;
424 }
425 ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB);
426 }
427
428 if (icsr0 & ICSR0_EIF) {
429 /* An error in FIFO occured, or there is a end of frame */
430 pxa_irda_fir_irq_eif(si, dev, icsr0);
431 }
432
433 ICCR0 = 0;
434 pxa_irda_fir_dma_rx_start(si);
435 while ((ICSR1 & ICSR1_RNE) && i--)
436 (void)ICDR;
437 ICCR0 = ICCR0_ITR | ICCR0_RXE;
438
439 if (i < 0)
440 printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
441
442 return IRQ_HANDLED;
443 }
444
445 /* hard_xmit interface of irda device */
446 static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
447 {
448 struct pxa_irda *si = netdev_priv(dev);
449 int speed = irda_get_next_speed(skb);
450
451 /*
452 * Does this packet contain a request to change the interface
453 * speed? If so, remember it until we complete the transmission
454 * of this frame.
455 */
456 if (speed != si->speed && speed != -1)
457 si->newspeed = speed;
458
459 /*
460 * If this is an empty frame, we can bypass a lot.
461 */
462 if (skb->len == 0) {
463 if (si->newspeed) {
464 si->newspeed = 0;
465 pxa_irda_set_speed(si, speed);
466 }
467 dev_kfree_skb(skb);
468 return 0;
469 }
470
471 netif_stop_queue(dev);
472
473 if (!IS_FIR(si)) {
474 si->tx_buff.data = si->tx_buff.head;
475 si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);
476
477 /* Disable STUART interrupts and switch to transmit mode. */
478 STIER = 0;
479 STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6;
480
481 /* enable STUART and transmit interrupts */
482 STIER = IER_UUE | IER_TIE;
483 } else {
484 unsigned long mtt = irda_get_mtt(skb);
485
486 si->dma_tx_buff_len = skb->len;
487 skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len);
488
489 if (mtt)
490 while ((unsigned)(OSCR - si->last_oscr)/4 < mtt)
491 cpu_relax();
492
493 /* stop RX DMA, disable FICP */
494 DCSR(si->rxdma) &= ~DCSR_RUN;
495 ICCR0 = 0;
496
497 pxa_irda_fir_dma_tx_start(si);
498 ICCR0 = ICCR0_ITR | ICCR0_TXE;
499 }
500
501 dev_kfree_skb(skb);
502 dev->trans_start = jiffies;
503 return 0;
504 }
505
506 static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
507 {
508 struct if_irda_req *rq = (struct if_irda_req *)ifreq;
509 struct pxa_irda *si = netdev_priv(dev);
510 int ret;
511
512 switch (cmd) {
513 case SIOCSBANDWIDTH:
514 ret = -EPERM;
515 if (capable(CAP_NET_ADMIN)) {
516 /*
517 * We are unable to set the speed if the
518 * device is not running.
519 */
520 if (netif_running(dev)) {
521 ret = pxa_irda_set_speed(si,
522 rq->ifr_baudrate);
523 } else {
524 printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n");
525 ret = 0;
526 }
527 }
528 break;
529
530 case SIOCSMEDIABUSY:
531 ret = -EPERM;
532 if (capable(CAP_NET_ADMIN)) {
533 irda_device_set_media_busy(dev, TRUE);
534 ret = 0;
535 }
536 break;
537
538 case SIOCGRECEIVING:
539 ret = 0;
540 rq->ifr_receiving = IS_FIR(si) ? 0
541 : si->rx_buff.state != OUTSIDE_FRAME;
542 break;
543
544 default:
545 ret = -EOPNOTSUPP;
546 break;
547 }
548
549 return ret;
550 }
551
552 static struct net_device_stats *pxa_irda_stats(struct net_device *dev)
553 {
554 struct pxa_irda *si = netdev_priv(dev);
555 return &si->stats;
556 }
557
558 static void pxa_irda_startup(struct pxa_irda *si)
559 {
560 /* Disable STUART interrupts */
561 STIER = 0;
562 /* enable STUART interrupt to the processor */
563 STMCR = MCR_OUT2;
564 /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
565 STLCR = LCR_WLS0 | LCR_WLS1;
566 /* enable FIFO, we use FIFO to improve performance */
567 STFCR = FCR_TRFIFOE | FCR_ITL_32;
568
569 /* disable FICP */
570 ICCR0 = 0;
571 /* configure FICP ICCR2 */
572 ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
573
574 /* configure DMAC */
575 DRCMR(17) = si->rxdma | DRCMR_MAPVLD;
576 DRCMR(18) = si->txdma | DRCMR_MAPVLD;
577
578 /* force SIR reinitialization */
579 si->speed = 4000000;
580 pxa_irda_set_speed(si, 9600);
581
582 printk(KERN_DEBUG "pxa_ir: irda startup\n");
583 }
584
585 static void pxa_irda_shutdown(struct pxa_irda *si)
586 {
587 unsigned long flags;
588
589 local_irq_save(flags);
590
591 /* disable STUART and interrupt */
592 STIER = 0;
593 /* disable STUART SIR mode */
594 STISR = 0;
595
596 /* disable DMA */
597 DCSR(si->txdma) &= ~DCSR_RUN;
598 DCSR(si->rxdma) &= ~DCSR_RUN;
599 /* disable FICP */
600 ICCR0 = 0;
601
602 /* disable the STUART or FICP clocks */
603 pxa_irda_disable_clk(si);
604
605 DRCMR(17) = 0;
606 DRCMR(18) = 0;
607
608 local_irq_restore(flags);
609
610 /* power off board transceiver */
611 si->pdata->transceiver_mode(si->dev, IR_OFF);
612
613 printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
614 }
615
616 static int pxa_irda_start(struct net_device *dev)
617 {
618 struct pxa_irda *si = netdev_priv(dev);
619 int err;
620
621 si->speed = 9600;
622
623 err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev);
624 if (err)
625 goto err_irq1;
626
627 err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev);
628 if (err)
629 goto err_irq2;
630
631 /*
632 * The interrupt must remain disabled for now.
633 */
634 disable_irq(IRQ_STUART);
635 disable_irq(IRQ_ICP);
636
637 err = -EBUSY;
638 si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev);
639 if (si->rxdma < 0)
640 goto err_rx_dma;
641
642 si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev);
643 if (si->txdma < 0)
644 goto err_tx_dma;
645
646 err = -ENOMEM;
647 si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
648 &si->dma_rx_buff_phy, GFP_KERNEL );
649 if (!si->dma_rx_buff)
650 goto err_dma_rx_buff;
651
652 si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
653 &si->dma_tx_buff_phy, GFP_KERNEL );
654 if (!si->dma_tx_buff)
655 goto err_dma_tx_buff;
656
657 /* Setup the serial port for the initial speed. */
658 pxa_irda_startup(si);
659
660 /*
661 * Open a new IrLAP layer instance.
662 */
663 si->irlap = irlap_open(dev, &si->qos, "pxa");
664 err = -ENOMEM;
665 if (!si->irlap)
666 goto err_irlap;
667
668 /*
669 * Now enable the interrupt and start the queue
670 */
671 enable_irq(IRQ_STUART);
672 enable_irq(IRQ_ICP);
673 netif_start_queue(dev);
674
675 printk(KERN_DEBUG "pxa_ir: irda driver opened\n");
676
677 return 0;
678
679 err_irlap:
680 pxa_irda_shutdown(si);
681 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
682 err_dma_tx_buff:
683 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
684 err_dma_rx_buff:
685 pxa_free_dma(si->txdma);
686 err_tx_dma:
687 pxa_free_dma(si->rxdma);
688 err_rx_dma:
689 free_irq(IRQ_ICP, dev);
690 err_irq2:
691 free_irq(IRQ_STUART, dev);
692 err_irq1:
693
694 return err;
695 }
696
697 static int pxa_irda_stop(struct net_device *dev)
698 {
699 struct pxa_irda *si = netdev_priv(dev);
700
701 netif_stop_queue(dev);
702
703 pxa_irda_shutdown(si);
704
705 /* Stop IrLAP */
706 if (si->irlap) {
707 irlap_close(si->irlap);
708 si->irlap = NULL;
709 }
710
711 free_irq(IRQ_STUART, dev);
712 free_irq(IRQ_ICP, dev);
713
714 pxa_free_dma(si->rxdma);
715 pxa_free_dma(si->txdma);
716
717 if (si->dma_rx_buff)
718 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
719 if (si->dma_tx_buff)
720 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
721
722 printk(KERN_DEBUG "pxa_ir: irda driver closed\n");
723 return 0;
724 }
725
726 static int pxa_irda_suspend(struct platform_device *_dev, pm_message_t state)
727 {
728 struct net_device *dev = platform_get_drvdata(_dev);
729 struct pxa_irda *si;
730
731 if (dev && netif_running(dev)) {
732 si = netdev_priv(dev);
733 netif_device_detach(dev);
734 pxa_irda_shutdown(si);
735 }
736
737 return 0;
738 }
739
740 static int pxa_irda_resume(struct platform_device *_dev)
741 {
742 struct net_device *dev = platform_get_drvdata(_dev);
743 struct pxa_irda *si;
744
745 if (dev && netif_running(dev)) {
746 si = netdev_priv(dev);
747 pxa_irda_startup(si);
748 netif_device_attach(dev);
749 netif_wake_queue(dev);
750 }
751
752 return 0;
753 }
754
755
756 static int pxa_irda_init_iobuf(iobuff_t *io, int size)
757 {
758 io->head = kmalloc(size, GFP_KERNEL | GFP_DMA);
759 if (io->head != NULL) {
760 io->truesize = size;
761 io->in_frame = FALSE;
762 io->state = OUTSIDE_FRAME;
763 io->data = io->head;
764 }
765 return io->head ? 0 : -ENOMEM;
766 }
767
768 static int pxa_irda_probe(struct platform_device *pdev)
769 {
770 struct net_device *dev;
771 struct pxa_irda *si;
772 unsigned int baudrate_mask;
773 int err;
774
775 if (!pdev->dev.platform_data)
776 return -ENODEV;
777
778 err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY;
779 if (err)
780 goto err_mem_1;
781
782 err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY;
783 if (err)
784 goto err_mem_2;
785
786 dev = alloc_irdadev(sizeof(struct pxa_irda));
787 if (!dev)
788 goto err_mem_3;
789
790 si = netdev_priv(dev);
791 si->dev = &pdev->dev;
792 si->pdata = pdev->dev.platform_data;
793
794 si->sir_clk = clk_get(&pdev->dev, "UARTCLK");
795 si->fir_clk = clk_get(&pdev->dev, "FICPCLK");
796 if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) {
797 err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk);
798 goto err_mem_4;
799 }
800
801 /*
802 * Initialise the SIR buffers
803 */
804 err = pxa_irda_init_iobuf(&si->rx_buff, 14384);
805 if (err)
806 goto err_mem_4;
807 err = pxa_irda_init_iobuf(&si->tx_buff, 4000);
808 if (err)
809 goto err_mem_5;
810
811 if (si->pdata->startup)
812 err = si->pdata->startup(si->dev);
813 if (err)
814 goto err_startup;
815
816 dev->hard_start_xmit = pxa_irda_hard_xmit;
817 dev->open = pxa_irda_start;
818 dev->stop = pxa_irda_stop;
819 dev->do_ioctl = pxa_irda_ioctl;
820 dev->get_stats = pxa_irda_stats;
821
822 irda_init_max_qos_capabilies(&si->qos);
823
824 baudrate_mask = 0;
825 if (si->pdata->transceiver_cap & IR_SIRMODE)
826 baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
827 if (si->pdata->transceiver_cap & IR_FIRMODE)
828 baudrate_mask |= IR_4000000 << 8;
829
830 si->qos.baud_rate.bits &= baudrate_mask;
831 si->qos.min_turn_time.bits = 7; /* 1ms or more */
832
833 irda_qos_bits_to_value(&si->qos);
834
835 err = register_netdev(dev);
836
837 if (err == 0)
838 dev_set_drvdata(&pdev->dev, dev);
839
840 if (err) {
841 if (si->pdata->shutdown)
842 si->pdata->shutdown(si->dev);
843 err_startup:
844 kfree(si->tx_buff.head);
845 err_mem_5:
846 kfree(si->rx_buff.head);
847 err_mem_4:
848 if (si->sir_clk && !IS_ERR(si->sir_clk))
849 clk_put(si->sir_clk);
850 if (si->fir_clk && !IS_ERR(si->fir_clk))
851 clk_put(si->fir_clk);
852 free_netdev(dev);
853 err_mem_3:
854 release_mem_region(__PREG(FICP), 0x1c);
855 err_mem_2:
856 release_mem_region(__PREG(STUART), 0x24);
857 }
858 err_mem_1:
859 return err;
860 }
861
862 static int pxa_irda_remove(struct platform_device *_dev)
863 {
864 struct net_device *dev = platform_get_drvdata(_dev);
865
866 if (dev) {
867 struct pxa_irda *si = netdev_priv(dev);
868 unregister_netdev(dev);
869 if (si->pdata->shutdown)
870 si->pdata->shutdown(si->dev);
871 kfree(si->tx_buff.head);
872 kfree(si->rx_buff.head);
873 clk_put(si->fir_clk);
874 clk_put(si->sir_clk);
875 free_netdev(dev);
876 }
877
878 release_mem_region(__PREG(STUART), 0x24);
879 release_mem_region(__PREG(FICP), 0x1c);
880
881 return 0;
882 }
883
884 static struct platform_driver pxa_ir_driver = {
885 .driver = {
886 .name = "pxa2xx-ir",
887 .owner = THIS_MODULE,
888 },
889 .probe = pxa_irda_probe,
890 .remove = pxa_irda_remove,
891 .suspend = pxa_irda_suspend,
892 .resume = pxa_irda_resume,
893 };
894
895 static int __init pxa_irda_init(void)
896 {
897 return platform_driver_register(&pxa_ir_driver);
898 }
899
900 static void __exit pxa_irda_exit(void)
901 {
902 platform_driver_unregister(&pxa_ir_driver);
903 }
904
905 module_init(pxa_irda_init);
906 module_exit(pxa_irda_exit);
907
908 MODULE_LICENSE("GPL");
909 MODULE_ALIAS("platform:pxa2xx-ir");
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