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[ARM] 5144/1: pxaficp_ir: cleanup includes
[deliverable/linux.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 <asm/arch/irda.h>
27 #include <asm/arch/pxa-regs.h>
28 #include <asm/arch/pxa2xx-gpio.h>
29
30 #define IrSR_RXPL_NEG_IS_ZERO (1<<4)
31 #define IrSR_RXPL_POS_IS_ZERO 0x0
32 #define IrSR_TXPL_NEG_IS_ZERO (1<<3)
33 #define IrSR_TXPL_POS_IS_ZERO 0x0
34 #define IrSR_XMODE_PULSE_1_6 (1<<2)
35 #define IrSR_XMODE_PULSE_3_16 0x0
36 #define IrSR_RCVEIR_IR_MODE (1<<1)
37 #define IrSR_RCVEIR_UART_MODE 0x0
38 #define IrSR_XMITIR_IR_MODE (1<<0)
39 #define IrSR_XMITIR_UART_MODE 0x0
40
41 #define IrSR_IR_RECEIVE_ON (\
42 IrSR_RXPL_NEG_IS_ZERO | \
43 IrSR_TXPL_POS_IS_ZERO | \
44 IrSR_XMODE_PULSE_3_16 | \
45 IrSR_RCVEIR_IR_MODE | \
46 IrSR_XMITIR_UART_MODE)
47
48 #define IrSR_IR_TRANSMIT_ON (\
49 IrSR_RXPL_NEG_IS_ZERO | \
50 IrSR_TXPL_POS_IS_ZERO | \
51 IrSR_XMODE_PULSE_3_16 | \
52 IrSR_RCVEIR_UART_MODE | \
53 IrSR_XMITIR_IR_MODE)
54
55 struct pxa_irda {
56 int speed;
57 int newspeed;
58 unsigned long last_oscr;
59
60 unsigned char *dma_rx_buff;
61 unsigned char *dma_tx_buff;
62 dma_addr_t dma_rx_buff_phy;
63 dma_addr_t dma_tx_buff_phy;
64 unsigned int dma_tx_buff_len;
65 int txdma;
66 int rxdma;
67
68 struct net_device_stats stats;
69 struct irlap_cb *irlap;
70 struct qos_info qos;
71
72 iobuff_t tx_buff;
73 iobuff_t rx_buff;
74
75 struct device *dev;
76 struct pxaficp_platform_data *pdata;
77 struct clk *fir_clk;
78 struct clk *sir_clk;
79 struct clk *cur_clk;
80 };
81
82 static inline void pxa_irda_disable_clk(struct pxa_irda *si)
83 {
84 if (si->cur_clk)
85 clk_disable(si->cur_clk);
86 si->cur_clk = NULL;
87 }
88
89 static inline void pxa_irda_enable_firclk(struct pxa_irda *si)
90 {
91 si->cur_clk = si->fir_clk;
92 clk_enable(si->fir_clk);
93 }
94
95 static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)
96 {
97 si->cur_clk = si->sir_clk;
98 clk_enable(si->sir_clk);
99 }
100
101
102 #define IS_FIR(si) ((si)->speed >= 4000000)
103 #define IRDA_FRAME_SIZE_LIMIT 2047
104
105 inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
106 {
107 DCSR(si->rxdma) = DCSR_NODESC;
108 DSADR(si->rxdma) = __PREG(ICDR);
109 DTADR(si->rxdma) = si->dma_rx_buff_phy;
110 DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT;
111 DCSR(si->rxdma) |= DCSR_RUN;
112 }
113
114 inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
115 {
116 DCSR(si->txdma) = DCSR_NODESC;
117 DSADR(si->txdma) = si->dma_tx_buff_phy;
118 DTADR(si->txdma) = __PREG(ICDR);
119 DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len;
120 DCSR(si->txdma) |= DCSR_RUN;
121 }
122
123 /*
124 * Set the IrDA communications speed.
125 */
126 static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
127 {
128 unsigned long flags;
129 unsigned int divisor;
130
131 switch (speed) {
132 case 9600: case 19200: case 38400:
133 case 57600: case 115200:
134
135 /* refer to PXA250/210 Developer's Manual 10-7 */
136 /* BaudRate = 14.7456 MHz / (16*Divisor) */
137 divisor = 14745600 / (16 * speed);
138
139 local_irq_save(flags);
140
141 if (IS_FIR(si)) {
142 /* stop RX DMA */
143 DCSR(si->rxdma) &= ~DCSR_RUN;
144 /* disable FICP */
145 ICCR0 = 0;
146 pxa_irda_disable_clk(si);
147
148 /* set board transceiver to SIR mode */
149 si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
150
151 /* configure GPIO46/47 */
152 pxa_gpio_mode(GPIO46_STRXD_MD);
153 pxa_gpio_mode(GPIO47_STTXD_MD);
154
155 /* enable the STUART clock */
156 pxa_irda_enable_sirclk(si);
157 }
158
159 /* disable STUART first */
160 STIER = 0;
161
162 /* access DLL & DLH */
163 STLCR |= LCR_DLAB;
164 STDLL = divisor & 0xff;
165 STDLH = divisor >> 8;
166 STLCR &= ~LCR_DLAB;
167
168 si->speed = speed;
169 STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
170 STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
171
172 local_irq_restore(flags);
173 break;
174
175 case 4000000:
176 local_irq_save(flags);
177
178 /* disable STUART */
179 STIER = 0;
180 STISR = 0;
181 pxa_irda_disable_clk(si);
182
183 /* disable FICP first */
184 ICCR0 = 0;
185
186 /* set board transceiver to FIR mode */
187 si->pdata->transceiver_mode(si->dev, IR_FIRMODE);
188
189 /* configure GPIO46/47 */
190 pxa_gpio_mode(GPIO46_ICPRXD_MD);
191 pxa_gpio_mode(GPIO47_ICPTXD_MD);
192
193 /* enable the FICP clock */
194 pxa_irda_enable_firclk(si);
195
196 si->speed = speed;
197 pxa_irda_fir_dma_rx_start(si);
198 ICCR0 = ICCR0_ITR | ICCR0_RXE;
199
200 local_irq_restore(flags);
201 break;
202
203 default:
204 return -EINVAL;
205 }
206
207 return 0;
208 }
209
210 /* SIR interrupt service routine. */
211 static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
212 {
213 struct net_device *dev = dev_id;
214 struct pxa_irda *si = netdev_priv(dev);
215 int iir, lsr, data;
216
217 iir = STIIR;
218
219 switch (iir & 0x0F) {
220 case 0x06: /* Receiver Line Status */
221 lsr = STLSR;
222 while (lsr & LSR_FIFOE) {
223 data = STRBR;
224 if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) {
225 printk(KERN_DEBUG "pxa_ir: sir receiving error\n");
226 si->stats.rx_errors++;
227 if (lsr & LSR_FE)
228 si->stats.rx_frame_errors++;
229 if (lsr & LSR_OE)
230 si->stats.rx_fifo_errors++;
231 } else {
232 si->stats.rx_bytes++;
233 async_unwrap_char(dev, &si->stats, &si->rx_buff, data);
234 }
235 lsr = STLSR;
236 }
237 dev->last_rx = jiffies;
238 si->last_oscr = OSCR;
239 break;
240
241 case 0x04: /* Received Data Available */
242 /* forth through */
243
244 case 0x0C: /* Character Timeout Indication */
245 do {
246 si->stats.rx_bytes++;
247 async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR);
248 } while (STLSR & LSR_DR);
249 dev->last_rx = jiffies;
250 si->last_oscr = OSCR;
251 break;
252
253 case 0x02: /* Transmit FIFO Data Request */
254 while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) {
255 STTHR = *si->tx_buff.data++;
256 si->tx_buff.len -= 1;
257 }
258
259 if (si->tx_buff.len == 0) {
260 si->stats.tx_packets++;
261 si->stats.tx_bytes += si->tx_buff.data -
262 si->tx_buff.head;
263
264 /* We need to ensure that the transmitter has finished. */
265 while ((STLSR & LSR_TEMT) == 0)
266 cpu_relax();
267 si->last_oscr = OSCR;
268
269 /*
270 * Ok, we've finished transmitting. Now enable
271 * the receiver. Sometimes we get a receive IRQ
272 * immediately after a transmit...
273 */
274 if (si->newspeed) {
275 pxa_irda_set_speed(si, si->newspeed);
276 si->newspeed = 0;
277 } else {
278 /* enable IR Receiver, disable IR Transmitter */
279 STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
280 /* enable STUART and receive interrupts */
281 STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
282 }
283 /* I'm hungry! */
284 netif_wake_queue(dev);
285 }
286 break;
287 }
288
289 return IRQ_HANDLED;
290 }
291
292 /* FIR Receive DMA interrupt handler */
293 static void pxa_irda_fir_dma_rx_irq(int channel, void *data)
294 {
295 int dcsr = DCSR(channel);
296
297 DCSR(channel) = dcsr & ~DCSR_RUN;
298
299 printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr);
300 }
301
302 /* FIR Transmit DMA interrupt handler */
303 static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
304 {
305 struct net_device *dev = data;
306 struct pxa_irda *si = netdev_priv(dev);
307 int dcsr;
308
309 dcsr = DCSR(channel);
310 DCSR(channel) = dcsr & ~DCSR_RUN;
311
312 if (dcsr & DCSR_ENDINTR) {
313 si->stats.tx_packets++;
314 si->stats.tx_bytes += si->dma_tx_buff_len;
315 } else {
316 si->stats.tx_errors++;
317 }
318
319 while (ICSR1 & ICSR1_TBY)
320 cpu_relax();
321 si->last_oscr = OSCR;
322
323 /*
324 * HACK: It looks like the TBY bit is dropped too soon.
325 * Without this delay things break.
326 */
327 udelay(120);
328
329 if (si->newspeed) {
330 pxa_irda_set_speed(si, si->newspeed);
331 si->newspeed = 0;
332 } else {
333 int i = 64;
334
335 ICCR0 = 0;
336 pxa_irda_fir_dma_rx_start(si);
337 while ((ICSR1 & ICSR1_RNE) && i--)
338 (void)ICDR;
339 ICCR0 = ICCR0_ITR | ICCR0_RXE;
340
341 if (i < 0)
342 printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
343 }
344 netif_wake_queue(dev);
345 }
346
347 /* EIF(Error in FIFO/End in Frame) handler for FIR */
348 static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0)
349 {
350 unsigned int len, stat, data;
351
352 /* Get the current data position. */
353 len = DTADR(si->rxdma) - si->dma_rx_buff_phy;
354
355 do {
356 /* Read Status, and then Data. */
357 stat = ICSR1;
358 rmb();
359 data = ICDR;
360
361 if (stat & (ICSR1_CRE | ICSR1_ROR)) {
362 si->stats.rx_errors++;
363 if (stat & ICSR1_CRE) {
364 printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n");
365 si->stats.rx_crc_errors++;
366 }
367 if (stat & ICSR1_ROR) {
368 printk(KERN_DEBUG "pxa_ir: fir receive overrun\n");
369 si->stats.rx_over_errors++;
370 }
371 } else {
372 si->dma_rx_buff[len++] = data;
373 }
374 /* If we hit the end of frame, there's no point in continuing. */
375 if (stat & ICSR1_EOF)
376 break;
377 } while (ICSR0 & ICSR0_EIF);
378
379 if (stat & ICSR1_EOF) {
380 /* end of frame. */
381 struct sk_buff *skb;
382
383 if (icsr0 & ICSR0_FRE) {
384 printk(KERN_ERR "pxa_ir: dropping erroneous frame\n");
385 si->stats.rx_dropped++;
386 return;
387 }
388
389 skb = alloc_skb(len+1,GFP_ATOMIC);
390 if (!skb) {
391 printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n");
392 si->stats.rx_dropped++;
393 return;
394 }
395
396 /* Align IP header to 20 bytes */
397 skb_reserve(skb, 1);
398 skb_copy_to_linear_data(skb, si->dma_rx_buff, len);
399 skb_put(skb, len);
400
401 /* Feed it to IrLAP */
402 skb->dev = dev;
403 skb_reset_mac_header(skb);
404 skb->protocol = htons(ETH_P_IRDA);
405 netif_rx(skb);
406
407 si->stats.rx_packets++;
408 si->stats.rx_bytes += len;
409
410 dev->last_rx = jiffies;
411 }
412 }
413
414 /* FIR interrupt handler */
415 static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id)
416 {
417 struct net_device *dev = dev_id;
418 struct pxa_irda *si = netdev_priv(dev);
419 int icsr0, i = 64;
420
421 /* stop RX DMA */
422 DCSR(si->rxdma) &= ~DCSR_RUN;
423 si->last_oscr = OSCR;
424 icsr0 = ICSR0;
425
426 if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) {
427 if (icsr0 & ICSR0_FRE) {
428 printk(KERN_DEBUG "pxa_ir: fir receive frame error\n");
429 si->stats.rx_frame_errors++;
430 } else {
431 printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
432 si->stats.rx_errors++;
433 }
434 ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB);
435 }
436
437 if (icsr0 & ICSR0_EIF) {
438 /* An error in FIFO occured, or there is a end of frame */
439 pxa_irda_fir_irq_eif(si, dev, icsr0);
440 }
441
442 ICCR0 = 0;
443 pxa_irda_fir_dma_rx_start(si);
444 while ((ICSR1 & ICSR1_RNE) && i--)
445 (void)ICDR;
446 ICCR0 = ICCR0_ITR | ICCR0_RXE;
447
448 if (i < 0)
449 printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
450
451 return IRQ_HANDLED;
452 }
453
454 /* hard_xmit interface of irda device */
455 static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
456 {
457 struct pxa_irda *si = netdev_priv(dev);
458 int speed = irda_get_next_speed(skb);
459
460 /*
461 * Does this packet contain a request to change the interface
462 * speed? If so, remember it until we complete the transmission
463 * of this frame.
464 */
465 if (speed != si->speed && speed != -1)
466 si->newspeed = speed;
467
468 /*
469 * If this is an empty frame, we can bypass a lot.
470 */
471 if (skb->len == 0) {
472 if (si->newspeed) {
473 si->newspeed = 0;
474 pxa_irda_set_speed(si, speed);
475 }
476 dev_kfree_skb(skb);
477 return 0;
478 }
479
480 netif_stop_queue(dev);
481
482 if (!IS_FIR(si)) {
483 si->tx_buff.data = si->tx_buff.head;
484 si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);
485
486 /* Disable STUART interrupts and switch to transmit mode. */
487 STIER = 0;
488 STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6;
489
490 /* enable STUART and transmit interrupts */
491 STIER = IER_UUE | IER_TIE;
492 } else {
493 unsigned long mtt = irda_get_mtt(skb);
494
495 si->dma_tx_buff_len = skb->len;
496 skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len);
497
498 if (mtt)
499 while ((unsigned)(OSCR - si->last_oscr)/4 < mtt)
500 cpu_relax();
501
502 /* stop RX DMA, disable FICP */
503 DCSR(si->rxdma) &= ~DCSR_RUN;
504 ICCR0 = 0;
505
506 pxa_irda_fir_dma_tx_start(si);
507 ICCR0 = ICCR0_ITR | ICCR0_TXE;
508 }
509
510 dev_kfree_skb(skb);
511 dev->trans_start = jiffies;
512 return 0;
513 }
514
515 static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
516 {
517 struct if_irda_req *rq = (struct if_irda_req *)ifreq;
518 struct pxa_irda *si = netdev_priv(dev);
519 int ret;
520
521 switch (cmd) {
522 case SIOCSBANDWIDTH:
523 ret = -EPERM;
524 if (capable(CAP_NET_ADMIN)) {
525 /*
526 * We are unable to set the speed if the
527 * device is not running.
528 */
529 if (netif_running(dev)) {
530 ret = pxa_irda_set_speed(si,
531 rq->ifr_baudrate);
532 } else {
533 printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n");
534 ret = 0;
535 }
536 }
537 break;
538
539 case SIOCSMEDIABUSY:
540 ret = -EPERM;
541 if (capable(CAP_NET_ADMIN)) {
542 irda_device_set_media_busy(dev, TRUE);
543 ret = 0;
544 }
545 break;
546
547 case SIOCGRECEIVING:
548 ret = 0;
549 rq->ifr_receiving = IS_FIR(si) ? 0
550 : si->rx_buff.state != OUTSIDE_FRAME;
551 break;
552
553 default:
554 ret = -EOPNOTSUPP;
555 break;
556 }
557
558 return ret;
559 }
560
561 static struct net_device_stats *pxa_irda_stats(struct net_device *dev)
562 {
563 struct pxa_irda *si = netdev_priv(dev);
564 return &si->stats;
565 }
566
567 static void pxa_irda_startup(struct pxa_irda *si)
568 {
569 /* Disable STUART interrupts */
570 STIER = 0;
571 /* enable STUART interrupt to the processor */
572 STMCR = MCR_OUT2;
573 /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
574 STLCR = LCR_WLS0 | LCR_WLS1;
575 /* enable FIFO, we use FIFO to improve performance */
576 STFCR = FCR_TRFIFOE | FCR_ITL_32;
577
578 /* disable FICP */
579 ICCR0 = 0;
580 /* configure FICP ICCR2 */
581 ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
582
583 /* configure DMAC */
584 DRCMR17 = si->rxdma | DRCMR_MAPVLD;
585 DRCMR18 = si->txdma | DRCMR_MAPVLD;
586
587 /* force SIR reinitialization */
588 si->speed = 4000000;
589 pxa_irda_set_speed(si, 9600);
590
591 printk(KERN_DEBUG "pxa_ir: irda startup\n");
592 }
593
594 static void pxa_irda_shutdown(struct pxa_irda *si)
595 {
596 unsigned long flags;
597
598 local_irq_save(flags);
599
600 /* disable STUART and interrupt */
601 STIER = 0;
602 /* disable STUART SIR mode */
603 STISR = 0;
604
605 /* disable DMA */
606 DCSR(si->txdma) &= ~DCSR_RUN;
607 DCSR(si->rxdma) &= ~DCSR_RUN;
608 /* disable FICP */
609 ICCR0 = 0;
610
611 /* disable the STUART or FICP clocks */
612 pxa_irda_disable_clk(si);
613
614 DRCMR17 = 0;
615 DRCMR18 = 0;
616
617 local_irq_restore(flags);
618
619 /* power off board transceiver */
620 si->pdata->transceiver_mode(si->dev, IR_OFF);
621
622 printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
623 }
624
625 static int pxa_irda_start(struct net_device *dev)
626 {
627 struct pxa_irda *si = netdev_priv(dev);
628 int err;
629
630 si->speed = 9600;
631
632 err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev);
633 if (err)
634 goto err_irq1;
635
636 err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev);
637 if (err)
638 goto err_irq2;
639
640 /*
641 * The interrupt must remain disabled for now.
642 */
643 disable_irq(IRQ_STUART);
644 disable_irq(IRQ_ICP);
645
646 err = -EBUSY;
647 si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev);
648 if (si->rxdma < 0)
649 goto err_rx_dma;
650
651 si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev);
652 if (si->txdma < 0)
653 goto err_tx_dma;
654
655 err = -ENOMEM;
656 si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
657 &si->dma_rx_buff_phy, GFP_KERNEL );
658 if (!si->dma_rx_buff)
659 goto err_dma_rx_buff;
660
661 si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
662 &si->dma_tx_buff_phy, GFP_KERNEL );
663 if (!si->dma_tx_buff)
664 goto err_dma_tx_buff;
665
666 /* Setup the serial port for the initial speed. */
667 pxa_irda_startup(si);
668
669 /*
670 * Open a new IrLAP layer instance.
671 */
672 si->irlap = irlap_open(dev, &si->qos, "pxa");
673 err = -ENOMEM;
674 if (!si->irlap)
675 goto err_irlap;
676
677 /*
678 * Now enable the interrupt and start the queue
679 */
680 enable_irq(IRQ_STUART);
681 enable_irq(IRQ_ICP);
682 netif_start_queue(dev);
683
684 printk(KERN_DEBUG "pxa_ir: irda driver opened\n");
685
686 return 0;
687
688 err_irlap:
689 pxa_irda_shutdown(si);
690 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
691 err_dma_tx_buff:
692 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
693 err_dma_rx_buff:
694 pxa_free_dma(si->txdma);
695 err_tx_dma:
696 pxa_free_dma(si->rxdma);
697 err_rx_dma:
698 free_irq(IRQ_ICP, dev);
699 err_irq2:
700 free_irq(IRQ_STUART, dev);
701 err_irq1:
702
703 return err;
704 }
705
706 static int pxa_irda_stop(struct net_device *dev)
707 {
708 struct pxa_irda *si = netdev_priv(dev);
709
710 netif_stop_queue(dev);
711
712 pxa_irda_shutdown(si);
713
714 /* Stop IrLAP */
715 if (si->irlap) {
716 irlap_close(si->irlap);
717 si->irlap = NULL;
718 }
719
720 free_irq(IRQ_STUART, dev);
721 free_irq(IRQ_ICP, dev);
722
723 pxa_free_dma(si->rxdma);
724 pxa_free_dma(si->txdma);
725
726 if (si->dma_rx_buff)
727 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
728 if (si->dma_tx_buff)
729 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
730
731 printk(KERN_DEBUG "pxa_ir: irda driver closed\n");
732 return 0;
733 }
734
735 static int pxa_irda_suspend(struct platform_device *_dev, pm_message_t state)
736 {
737 struct net_device *dev = platform_get_drvdata(_dev);
738 struct pxa_irda *si;
739
740 if (dev && netif_running(dev)) {
741 si = netdev_priv(dev);
742 netif_device_detach(dev);
743 pxa_irda_shutdown(si);
744 }
745
746 return 0;
747 }
748
749 static int pxa_irda_resume(struct platform_device *_dev)
750 {
751 struct net_device *dev = platform_get_drvdata(_dev);
752 struct pxa_irda *si;
753
754 if (dev && netif_running(dev)) {
755 si = netdev_priv(dev);
756 pxa_irda_startup(si);
757 netif_device_attach(dev);
758 netif_wake_queue(dev);
759 }
760
761 return 0;
762 }
763
764
765 static int pxa_irda_init_iobuf(iobuff_t *io, int size)
766 {
767 io->head = kmalloc(size, GFP_KERNEL | GFP_DMA);
768 if (io->head != NULL) {
769 io->truesize = size;
770 io->in_frame = FALSE;
771 io->state = OUTSIDE_FRAME;
772 io->data = io->head;
773 }
774 return io->head ? 0 : -ENOMEM;
775 }
776
777 static int pxa_irda_probe(struct platform_device *pdev)
778 {
779 struct net_device *dev;
780 struct pxa_irda *si;
781 unsigned int baudrate_mask;
782 int err;
783
784 if (!pdev->dev.platform_data)
785 return -ENODEV;
786
787 err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY;
788 if (err)
789 goto err_mem_1;
790
791 err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY;
792 if (err)
793 goto err_mem_2;
794
795 dev = alloc_irdadev(sizeof(struct pxa_irda));
796 if (!dev)
797 goto err_mem_3;
798
799 si = netdev_priv(dev);
800 si->dev = &pdev->dev;
801 si->pdata = pdev->dev.platform_data;
802
803 si->sir_clk = clk_get(&pdev->dev, "UARTCLK");
804 si->fir_clk = clk_get(&pdev->dev, "FICPCLK");
805 if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) {
806 err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk);
807 goto err_mem_4;
808 }
809
810 /*
811 * Initialise the SIR buffers
812 */
813 err = pxa_irda_init_iobuf(&si->rx_buff, 14384);
814 if (err)
815 goto err_mem_4;
816 err = pxa_irda_init_iobuf(&si->tx_buff, 4000);
817 if (err)
818 goto err_mem_5;
819
820 if (si->pdata->startup)
821 err = si->pdata->startup(si->dev);
822 if (err)
823 goto err_startup;
824
825 dev->hard_start_xmit = pxa_irda_hard_xmit;
826 dev->open = pxa_irda_start;
827 dev->stop = pxa_irda_stop;
828 dev->do_ioctl = pxa_irda_ioctl;
829 dev->get_stats = pxa_irda_stats;
830
831 irda_init_max_qos_capabilies(&si->qos);
832
833 baudrate_mask = 0;
834 if (si->pdata->transceiver_cap & IR_SIRMODE)
835 baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
836 if (si->pdata->transceiver_cap & IR_FIRMODE)
837 baudrate_mask |= IR_4000000 << 8;
838
839 si->qos.baud_rate.bits &= baudrate_mask;
840 si->qos.min_turn_time.bits = 7; /* 1ms or more */
841
842 irda_qos_bits_to_value(&si->qos);
843
844 err = register_netdev(dev);
845
846 if (err == 0)
847 dev_set_drvdata(&pdev->dev, dev);
848
849 if (err) {
850 if (si->pdata->shutdown)
851 si->pdata->shutdown(si->dev);
852 err_startup:
853 kfree(si->tx_buff.head);
854 err_mem_5:
855 kfree(si->rx_buff.head);
856 err_mem_4:
857 if (si->sir_clk && !IS_ERR(si->sir_clk))
858 clk_put(si->sir_clk);
859 if (si->fir_clk && !IS_ERR(si->fir_clk))
860 clk_put(si->fir_clk);
861 free_netdev(dev);
862 err_mem_3:
863 release_mem_region(__PREG(FICP), 0x1c);
864 err_mem_2:
865 release_mem_region(__PREG(STUART), 0x24);
866 }
867 err_mem_1:
868 return err;
869 }
870
871 static int pxa_irda_remove(struct platform_device *_dev)
872 {
873 struct net_device *dev = platform_get_drvdata(_dev);
874
875 if (dev) {
876 struct pxa_irda *si = netdev_priv(dev);
877 unregister_netdev(dev);
878 if (si->pdata->shutdown)
879 si->pdata->shutdown(si->dev);
880 kfree(si->tx_buff.head);
881 kfree(si->rx_buff.head);
882 clk_put(si->fir_clk);
883 clk_put(si->sir_clk);
884 free_netdev(dev);
885 }
886
887 release_mem_region(__PREG(STUART), 0x24);
888 release_mem_region(__PREG(FICP), 0x1c);
889
890 return 0;
891 }
892
893 static struct platform_driver pxa_ir_driver = {
894 .driver = {
895 .name = "pxa2xx-ir",
896 .owner = THIS_MODULE,
897 },
898 .probe = pxa_irda_probe,
899 .remove = pxa_irda_remove,
900 .suspend = pxa_irda_suspend,
901 .resume = pxa_irda_resume,
902 };
903
904 static int __init pxa_irda_init(void)
905 {
906 return platform_driver_register(&pxa_ir_driver);
907 }
908
909 static void __exit pxa_irda_exit(void)
910 {
911 platform_driver_unregister(&pxa_ir_driver);
912 }
913
914 module_init(pxa_irda_init);
915 module_exit(pxa_irda_exit);
916
917 MODULE_LICENSE("GPL");
918 MODULE_ALIAS("platform:pxa2xx-ir");
Linux kernel - Deliverables
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