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authorNicolas Pitre <nico@cam.org>2005-10-28 11:39:33 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-10-28 11:39:33 -0400
commit6f475c0133eb91c7df3b056843dc33d2824368a2 (patch)
tree051e35468fb1965c72e6fa5b679fac48975508b8 /drivers/net/irda/pxaficp_ir.c
parenta999cb04b4bfb4a2243383f00d5714b8d7163035 (diff)
[ARM] 2897/2: PXA2xx IRDA support
Patch from Nicolas Pitre This is the PXA2xx common IRDA driver, plus platform support for Lubbock and Mainstone. Signed-off-by: Nicolas Pitre <nico@cam.org> Acked-by: Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/net/irda/pxaficp_ir.c')
-rw-r--r--drivers/net/irda/pxaficp_ir.c871
1 files changed, 871 insertions, 0 deletions
diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c
new file mode 100644
index 000000000000..aef80f5e7c9c
--- /dev/null
+++ b/drivers/net/irda/pxaficp_ir.c
@@ -0,0 +1,871 @@
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/config.h>
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/init.h>
19#include <linux/errno.h>
20#include <linux/netdevice.h>
21#include <linux/slab.h>
22#include <linux/rtnetlink.h>
23#include <linux/interrupt.h>
24#include <linux/dma-mapping.h>
25#include <linux/pm.h>
26
27#include <net/irda/irda.h>
28#include <net/irda/irmod.h>
29#include <net/irda/wrapper.h>
30#include <net/irda/irda_device.h>
31
32#include <asm/irq.h>
33#include <asm/dma.h>
34#include <asm/delay.h>
35#include <asm/hardware.h>
36#include <asm/arch/irda.h>
37#include <asm/arch/pxa-regs.h>
38
39#ifdef CONFIG_MACH_MAINSTONE
40#include <asm/arch/mainstone.h>
41#endif
42
43#define IrSR_RXPL_NEG_IS_ZERO (1<<4)
44#define IrSR_RXPL_POS_IS_ZERO 0x0
45#define IrSR_TXPL_NEG_IS_ZERO (1<<3)
46#define IrSR_TXPL_POS_IS_ZERO 0x0
47#define IrSR_XMODE_PULSE_1_6 (1<<2)
48#define IrSR_XMODE_PULSE_3_16 0x0
49#define IrSR_RCVEIR_IR_MODE (1<<1)
50#define IrSR_RCVEIR_UART_MODE 0x0
51#define IrSR_XMITIR_IR_MODE (1<<0)
52#define IrSR_XMITIR_UART_MODE 0x0
53
54#define IrSR_IR_RECEIVE_ON (\
55 IrSR_RXPL_NEG_IS_ZERO | \
56 IrSR_TXPL_POS_IS_ZERO | \
57 IrSR_XMODE_PULSE_3_16 | \
58 IrSR_RCVEIR_IR_MODE | \
59 IrSR_XMITIR_UART_MODE)
60
61#define IrSR_IR_TRANSMIT_ON (\
62 IrSR_RXPL_NEG_IS_ZERO | \
63 IrSR_TXPL_POS_IS_ZERO | \
64 IrSR_XMODE_PULSE_3_16 | \
65 IrSR_RCVEIR_UART_MODE | \
66 IrSR_XMITIR_IR_MODE)
67
68struct pxa_irda {
69 int speed;
70 int newspeed;
71 unsigned long last_oscr;
72
73 unsigned char *dma_rx_buff;
74 unsigned char *dma_tx_buff;
75 dma_addr_t dma_rx_buff_phy;
76 dma_addr_t dma_tx_buff_phy;
77 unsigned int dma_tx_buff_len;
78 int txdma;
79 int rxdma;
80
81 struct net_device_stats stats;
82 struct irlap_cb *irlap;
83 struct qos_info qos;
84
85 iobuff_t tx_buff;
86 iobuff_t rx_buff;
87
88 struct device *dev;
89 struct pxaficp_platform_data *pdata;
90};
91
92
93#define IS_FIR(si) ((si)->speed >= 4000000)
94#define IRDA_FRAME_SIZE_LIMIT 2047
95
96inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
97{
98 DCSR(si->rxdma) = DCSR_NODESC;
99 DSADR(si->rxdma) = __PREG(ICDR);
100 DTADR(si->rxdma) = si->dma_rx_buff_phy;
101 DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT;
102 DCSR(si->rxdma) |= DCSR_RUN;
103}
104
105inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
106{
107 DCSR(si->txdma) = DCSR_NODESC;
108 DSADR(si->txdma) = si->dma_tx_buff_phy;
109 DTADR(si->txdma) = __PREG(ICDR);
110 DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len;
111 DCSR(si->txdma) |= DCSR_RUN;
112}
113
114/*
115 * Set the IrDA communications speed.
116 */
117static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
118{
119 unsigned long flags;
120 unsigned int divisor;
121
122 switch (speed) {
123 case 9600: case 19200: case 38400:
124 case 57600: case 115200:
125
126 /* refer to PXA250/210 Developer's Manual 10-7 */
127 /* BaudRate = 14.7456 MHz / (16*Divisor) */
128 divisor = 14745600 / (16 * speed);
129
130 local_irq_save(flags);
131
132 if (IS_FIR(si)) {
133 /* stop RX DMA */
134 DCSR(si->rxdma) &= ~DCSR_RUN;
135 /* disable FICP */
136 ICCR0 = 0;
137 pxa_set_cken(CKEN13_FICP, 0);
138
139 /* set board transceiver to SIR mode */
140 si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
141
142 /* configure GPIO46/47 */
143 pxa_gpio_mode(GPIO46_STRXD_MD);
144 pxa_gpio_mode(GPIO47_STTXD_MD);
145
146 /* enable the STUART clock */
147 pxa_set_cken(CKEN5_STUART, 1);
148 }
149
150 /* disable STUART first */
151 STIER = 0;
152
153 /* access DLL & DLH */
154 STLCR |= LCR_DLAB;
155 STDLL = divisor & 0xff;
156 STDLH = divisor >> 8;
157 STLCR &= ~LCR_DLAB;
158
159 si->speed = speed;
160 STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
161 STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
162
163 local_irq_restore(flags);
164 break;
165
166 case 4000000:
167 local_irq_save(flags);
168
169 /* disable STUART */
170 STIER = 0;
171 STISR = 0;
172 pxa_set_cken(CKEN5_STUART, 0);
173
174 /* disable FICP first */
175 ICCR0 = 0;
176
177 /* set board transceiver to FIR mode */
178 si->pdata->transceiver_mode(si->dev, IR_FIRMODE);
179
180 /* configure GPIO46/47 */
181 pxa_gpio_mode(GPIO46_ICPRXD_MD);
182 pxa_gpio_mode(GPIO47_ICPTXD_MD);
183
184 /* enable the FICP clock */
185 pxa_set_cken(CKEN13_FICP, 1);
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. */
202static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id, struct pt_regs *regs)
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 */
284static void pxa_irda_fir_dma_rx_irq(int channel, void *data, struct pt_regs *regs)
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 */
294static void pxa_irda_fir_dma_tx_irq(int channel, void *data, struct pt_regs *regs)
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 ICCR0 = 0;
325 pxa_irda_fir_dma_rx_start(si);
326 ICCR0 = ICCR0_ITR | ICCR0_RXE;
327 }
328 netif_wake_queue(dev);
329}
330
331/* EIF(Error in FIFO/End in Frame) handler for FIR */
332static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev)
333{
334 unsigned int len, stat, data;
335
336 /* Get the current data position. */
337 len = DTADR(si->rxdma) - si->dma_rx_buff_phy;
338
339 do {
340 /* Read Status, and then Data. */
341 stat = ICSR1;
342 rmb();
343 data = ICDR;
344
345 if (stat & (ICSR1_CRE | ICSR1_ROR)) {
346 si->stats.rx_errors++;
347 if (stat & ICSR1_CRE) {
348 printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n");
349 si->stats.rx_crc_errors++;
350 }
351 if (stat & ICSR1_ROR) {
352 printk(KERN_DEBUG "pxa_ir: fir receive overrun\n");
353 si->stats.rx_frame_errors++;
354 }
355 } else {
356 si->dma_rx_buff[len++] = data;
357 }
358 /* If we hit the end of frame, there's no point in continuing. */
359 if (stat & ICSR1_EOF)
360 break;
361 } while (ICSR0 & ICSR0_EIF);
362
363 if (stat & ICSR1_EOF) {
364 /* end of frame. */
365 struct sk_buff *skb = alloc_skb(len+1,GFP_ATOMIC);
366 if (!skb) {
367 printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n");
368 si->stats.rx_dropped++;
369 return;
370 }
371
372 /* Align IP header to 20 bytes */
373 skb_reserve(skb, 1);
374 memcpy(skb->data, si->dma_rx_buff, len);
375 skb_put(skb, len);
376
377 /* Feed it to IrLAP */
378 skb->dev = dev;
379 skb->mac.raw = skb->data;
380 skb->protocol = htons(ETH_P_IRDA);
381 netif_rx(skb);
382
383 si->stats.rx_packets++;
384 si->stats.rx_bytes += len;
385
386 dev->last_rx = jiffies;
387 }
388}
389
390/* FIR interrupt handler */
391static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id, struct pt_regs *regs)
392{
393 struct net_device *dev = dev_id;
394 struct pxa_irda *si = netdev_priv(dev);
395 int icsr0;
396
397 /* stop RX DMA */
398 DCSR(si->rxdma) &= ~DCSR_RUN;
399 si->last_oscr = OSCR;
400 icsr0 = ICSR0;
401
402 if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) {
403 if (icsr0 & ICSR0_FRE) {
404 printk(KERN_DEBUG "pxa_ir: fir receive frame error\n");
405 si->stats.rx_frame_errors++;
406 } else {
407 printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
408 si->stats.rx_errors++;
409 }
410 ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB);
411 }
412
413 if (icsr0 & ICSR0_EIF) {
414 /* An error in FIFO occured, or there is a end of frame */
415 pxa_irda_fir_irq_eif(si, dev);
416 }
417
418 ICCR0 = 0;
419 pxa_irda_fir_dma_rx_start(si);
420 ICCR0 = ICCR0_ITR | ICCR0_RXE;
421
422 return IRQ_HANDLED;
423}
424
425/* hard_xmit interface of irda device */
426static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
427{
428 struct pxa_irda *si = netdev_priv(dev);
429 int speed = irda_get_next_speed(skb);
430
431 /*
432 * Does this packet contain a request to change the interface
433 * speed? If so, remember it until we complete the transmission
434 * of this frame.
435 */
436 if (speed != si->speed && speed != -1)
437 si->newspeed = speed;
438
439 /*
440 * If this is an empty frame, we can bypass a lot.
441 */
442 if (skb->len == 0) {
443 if (si->newspeed) {
444 si->newspeed = 0;
445 pxa_irda_set_speed(si, speed);
446 }
447 dev_kfree_skb(skb);
448 return 0;
449 }
450
451 netif_stop_queue(dev);
452
453 if (!IS_FIR(si)) {
454 si->tx_buff.data = si->tx_buff.head;
455 si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);
456
457 /* Disable STUART interrupts and switch to transmit mode. */
458 STIER = 0;
459 STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6;
460
461 /* enable STUART and transmit interrupts */
462 STIER = IER_UUE | IER_TIE;
463 } else {
464 unsigned long mtt = irda_get_mtt(skb);
465
466 si->dma_tx_buff_len = skb->len;
467 memcpy(si->dma_tx_buff, skb->data, skb->len);
468
469 if (mtt)
470 while ((unsigned)(OSCR - si->last_oscr)/4 < mtt)
471 cpu_relax();
472
473 /* stop RX DMA, disable FICP */
474 DCSR(si->rxdma) &= ~DCSR_RUN;
475 ICCR0 = 0;
476
477 pxa_irda_fir_dma_tx_start(si);
478 ICCR0 = ICCR0_ITR | ICCR0_TXE;
479 }
480
481 dev_kfree_skb(skb);
482 dev->trans_start = jiffies;
483 return 0;
484}
485
486static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
487{
488 struct if_irda_req *rq = (struct if_irda_req *)ifreq;
489 struct pxa_irda *si = netdev_priv(dev);
490 int ret;
491
492 switch (cmd) {
493 case SIOCSBANDWIDTH:
494 ret = -EPERM;
495 if (capable(CAP_NET_ADMIN)) {
496 /*
497 * We are unable to set the speed if the
498 * device is not running.
499 */
500 if (netif_running(dev)) {
501 ret = pxa_irda_set_speed(si,
502 rq->ifr_baudrate);
503 } else {
504 printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n");
505 ret = 0;
506 }
507 }
508 break;
509
510 case SIOCSMEDIABUSY:
511 ret = -EPERM;
512 if (capable(CAP_NET_ADMIN)) {
513 irda_device_set_media_busy(dev, TRUE);
514 ret = 0;
515 }
516 break;
517
518 case SIOCGRECEIVING:
519 ret = 0;
520 rq->ifr_receiving = IS_FIR(si) ? 0
521 : si->rx_buff.state != OUTSIDE_FRAME;
522 break;
523
524 default:
525 ret = -EOPNOTSUPP;
526 break;
527 }
528
529 return ret;
530}
531
532static struct net_device_stats *pxa_irda_stats(struct net_device *dev)
533{
534 struct pxa_irda *si = netdev_priv(dev);
535 return &si->stats;
536}
537
538static void pxa_irda_startup(struct pxa_irda *si)
539{
540 /* Disable STUART interrupts */
541 STIER = 0;
542 /* enable STUART interrupt to the processor */
543 STMCR = MCR_OUT2;
544 /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
545 STLCR = LCR_WLS0 | LCR_WLS1;
546 /* enable FIFO, we use FIFO to improve performance */
547 STFCR = FCR_TRFIFOE | FCR_ITL_32;
548
549 /* disable FICP */
550 ICCR0 = 0;
551 /* configure FICP ICCR2 */
552 ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
553
554 /* configure DMAC */
555 DRCMR17 = si->rxdma | DRCMR_MAPVLD;
556 DRCMR18 = si->txdma | DRCMR_MAPVLD;
557
558 /* force SIR reinitialization */
559 si->speed = 4000000;
560 pxa_irda_set_speed(si, 9600);
561
562 printk(KERN_DEBUG "pxa_ir: irda startup\n");
563}
564
565static void pxa_irda_shutdown(struct pxa_irda *si)
566{
567 unsigned long flags;
568
569 local_irq_save(flags);
570
571 /* disable STUART and interrupt */
572 STIER = 0;
573 /* disable STUART SIR mode */
574 STISR = 0;
575 /* disable the STUART clock */
576 pxa_set_cken(CKEN5_STUART, 0);
577
578 /* disable DMA */
579 DCSR(si->txdma) &= ~DCSR_RUN;
580 DCSR(si->rxdma) &= ~DCSR_RUN;
581 /* disable FICP */
582 ICCR0 = 0;
583 /* disable the FICP clock */
584 pxa_set_cken(CKEN13_FICP, 0);
585
586 DRCMR17 = 0;
587 DRCMR18 = 0;
588
589 local_irq_restore(flags);
590
591 /* power off board transceiver */
592 si->pdata->transceiver_mode(si->dev, IR_OFF);
593
594 printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
595}
596
597static int pxa_irda_start(struct net_device *dev)
598{
599 struct pxa_irda *si = netdev_priv(dev);
600 int err;
601
602 si->speed = 9600;
603
604 err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev);
605 if (err)
606 goto err_irq1;
607
608 err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev);
609 if (err)
610 goto err_irq2;
611
612 /*
613 * The interrupt must remain disabled for now.
614 */
615 disable_irq(IRQ_STUART);
616 disable_irq(IRQ_ICP);
617
618 err = -EBUSY;
619 si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev);
620 if (si->rxdma < 0)
621 goto err_rx_dma;
622
623 si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev);
624 if (si->txdma < 0)
625 goto err_tx_dma;
626
627 err = -ENOMEM;
628 si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
629 &si->dma_rx_buff_phy, GFP_KERNEL );
630 if (!si->dma_rx_buff)
631 goto err_dma_rx_buff;
632
633 si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
634 &si->dma_tx_buff_phy, GFP_KERNEL );
635 if (!si->dma_tx_buff)
636 goto err_dma_tx_buff;
637
638 /* Setup the serial port for the initial speed. */
639 pxa_irda_startup(si);
640
641 /*
642 * Open a new IrLAP layer instance.
643 */
644 si->irlap = irlap_open(dev, &si->qos, "pxa");
645 err = -ENOMEM;
646 if (!si->irlap)
647 goto err_irlap;
648
649 /*
650 * Now enable the interrupt and start the queue
651 */
652 enable_irq(IRQ_STUART);
653 enable_irq(IRQ_ICP);
654 netif_start_queue(dev);
655
656 printk(KERN_DEBUG "pxa_ir: irda driver opened\n");
657
658 return 0;
659
660err_irlap:
661 pxa_irda_shutdown(si);
662 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
663err_dma_tx_buff:
664 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
665err_dma_rx_buff:
666 pxa_free_dma(si->txdma);
667err_tx_dma:
668 pxa_free_dma(si->rxdma);
669err_rx_dma:
670 free_irq(IRQ_ICP, dev);
671err_irq2:
672 free_irq(IRQ_STUART, dev);
673err_irq1:
674
675 return err;
676}
677
678static int pxa_irda_stop(struct net_device *dev)
679{
680 struct pxa_irda *si = netdev_priv(dev);
681
682 netif_stop_queue(dev);
683
684 pxa_irda_shutdown(si);
685
686 /* Stop IrLAP */
687 if (si->irlap) {
688 irlap_close(si->irlap);
689 si->irlap = NULL;
690 }
691
692 free_irq(IRQ_STUART, dev);
693 free_irq(IRQ_ICP, dev);
694
695 pxa_free_dma(si->rxdma);
696 pxa_free_dma(si->txdma);
697
698 if (si->dma_rx_buff)
699 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
700 if (si->dma_tx_buff)
701 dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
702
703 printk(KERN_DEBUG "pxa_ir: irda driver closed\n");
704 return 0;
705}
706
707static int pxa_irda_suspend(struct device *_dev, pm_message_t state, u32 level)
708{
709 struct net_device *dev = dev_get_drvdata(_dev);
710 struct pxa_irda *si;
711
712 if (!dev || level != SUSPEND_DISABLE)
713 return 0;
714
715 if (netif_running(dev)) {
716 si = netdev_priv(dev);
717 netif_device_detach(dev);
718 pxa_irda_shutdown(si);
719 }
720
721 return 0;
722}
723
724static int pxa_irda_resume(struct device *_dev, u32 level)
725{
726 struct net_device *dev = dev_get_drvdata(_dev);
727 struct pxa_irda *si;
728
729 if (!dev || level != RESUME_ENABLE)
730 return 0;
731
732 if (netif_running(dev)) {
733 si = netdev_priv(dev);
734 pxa_irda_startup(si);
735 netif_device_attach(dev);
736 netif_wake_queue(dev);
737 }
738
739 return 0;
740}
741
742
743static int pxa_irda_init_iobuf(iobuff_t *io, int size)
744{
745 io->head = kmalloc(size, GFP_KERNEL | GFP_DMA);
746 if (io->head != NULL) {
747 io->truesize = size;
748 io->in_frame = FALSE;
749 io->state = OUTSIDE_FRAME;
750 io->data = io->head;
751 }
752 return io->head ? 0 : -ENOMEM;
753}
754
755static int pxa_irda_probe(struct device *_dev)
756{
757 struct platform_device *pdev = to_platform_device(_dev);
758 struct net_device *dev;
759 struct pxa_irda *si;
760 unsigned int baudrate_mask;
761 int err;
762
763 if (!pdev->dev.platform_data)
764 return -ENODEV;
765
766 err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY;
767 if (err)
768 goto err_mem_1;
769
770 err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY;
771 if (err)
772 goto err_mem_2;
773
774 dev = alloc_irdadev(sizeof(struct pxa_irda));
775 if (!dev)
776 goto err_mem_3;
777
778 si = netdev_priv(dev);
779 si->dev = &pdev->dev;
780 si->pdata = pdev->dev.platform_data;
781
782 /*
783 * Initialise the SIR buffers
784 */
785 err = pxa_irda_init_iobuf(&si->rx_buff, 14384);
786 if (err)
787 goto err_mem_4;
788 err = pxa_irda_init_iobuf(&si->tx_buff, 4000);
789 if (err)
790 goto err_mem_5;
791
792 dev->hard_start_xmit = pxa_irda_hard_xmit;
793 dev->open = pxa_irda_start;
794 dev->stop = pxa_irda_stop;
795 dev->do_ioctl = pxa_irda_ioctl;
796 dev->get_stats = pxa_irda_stats;
797
798 irda_init_max_qos_capabilies(&si->qos);
799
800 baudrate_mask = 0;
801 if (si->pdata->transceiver_cap & IR_SIRMODE)
802 baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
803 if (si->pdata->transceiver_cap & IR_FIRMODE)
804 baudrate_mask |= IR_4000000 << 8;
805
806 si->qos.baud_rate.bits &= baudrate_mask;
807 si->qos.min_turn_time.bits = 7; /* 1ms or more */
808
809 irda_qos_bits_to_value(&si->qos);
810
811 err = register_netdev(dev);
812
813 if (err == 0)
814 dev_set_drvdata(&pdev->dev, dev);
815
816 if (err) {
817 kfree(si->tx_buff.head);
818err_mem_5:
819 kfree(si->rx_buff.head);
820err_mem_4:
821 free_netdev(dev);
822err_mem_3:
823 release_mem_region(__PREG(FICP), 0x1c);
824err_mem_2:
825 release_mem_region(__PREG(STUART), 0x24);
826 }
827err_mem_1:
828 return err;
829}
830
831static int pxa_irda_remove(struct device *_dev)
832{
833 struct net_device *dev = dev_get_drvdata(_dev);
834
835 if (dev) {
836 struct pxa_irda *si = netdev_priv(dev);
837 unregister_netdev(dev);
838 kfree(si->tx_buff.head);
839 kfree(si->rx_buff.head);
840 free_netdev(dev);
841 }
842
843 release_mem_region(__PREG(STUART), 0x24);
844 release_mem_region(__PREG(FICP), 0x1c);
845
846 return 0;
847}
848
849static struct device_driver pxa_ir_driver = {
850 .name = "pxa2xx-ir",
851 .bus = &platform_bus_type,
852 .probe = pxa_irda_probe,
853 .remove = pxa_irda_remove,
854 .suspend = pxa_irda_suspend,
855 .resume = pxa_irda_resume,
856};
857
858static int __init pxa_irda_init(void)
859{
860 return driver_register(&pxa_ir_driver);
861}
862
863static void __exit pxa_irda_exit(void)
864{
865 driver_unregister(&pxa_ir_driver);
866}
867
868module_init(pxa_irda_init);
869module_exit(pxa_irda_exit);
870
871MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 22:07:12 -0500