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21#include <linux/clk.h>
22#include <linux/module.h>
23#include <linux/netdevice.h>
24#include <linux/interrupt.h>
25#include <linux/platform_device.h>
26#include <linux/slab.h>
27#include <linux/types.h>
28
29#include <net/irda/irda.h>
30#include <net/irda/irmod.h>
31#include <net/irda/wrapper.h>
32#include <net/irda/irda_device.h>
33#include <asm/mach-au1x00/au1000.h>
34
35
36#define IR_RING_PTR_STATUS 0x00
37#define IR_RING_BASE_ADDR_H 0x04
38#define IR_RING_BASE_ADDR_L 0x08
39#define IR_RING_SIZE 0x0C
40#define IR_RING_PROMPT 0x10
41#define IR_RING_ADDR_CMPR 0x14
42#define IR_INT_CLEAR 0x18
43#define IR_CONFIG_1 0x20
44#define IR_SIR_FLAGS 0x24
45#define IR_STATUS 0x28
46#define IR_READ_PHY_CONFIG 0x2C
47#define IR_WRITE_PHY_CONFIG 0x30
48#define IR_MAX_PKT_LEN 0x34
49#define IR_RX_BYTE_CNT 0x38
50#define IR_CONFIG_2 0x3C
51#define IR_ENABLE 0x40
52
53
54#define IR_RX_INVERT_LED (1 << 0)
55#define IR_TX_INVERT_LED (1 << 1)
56#define IR_ST (1 << 2)
57#define IR_SF (1 << 3)
58#define IR_SIR (1 << 4)
59#define IR_MIR (1 << 5)
60#define IR_FIR (1 << 6)
61#define IR_16CRC (1 << 7)
62#define IR_TD (1 << 8)
63#define IR_RX_ALL (1 << 9)
64#define IR_DMA_ENABLE (1 << 10)
65#define IR_RX_ENABLE (1 << 11)
66#define IR_TX_ENABLE (1 << 12)
67#define IR_LOOPBACK (1 << 14)
68#define IR_SIR_MODE (IR_SIR | IR_DMA_ENABLE | \
69 IR_RX_ALL | IR_RX_ENABLE | IR_SF | \
70 IR_16CRC)
71
72
73#define IR_RX_STATUS (1 << 9)
74#define IR_TX_STATUS (1 << 10)
75#define IR_PHYEN (1 << 15)
76
77
78#define IR_BR(x) (((x) & 0x3f) << 10)
79#define IR_PW(x) (((x) & 0x1f) << 5)
80#define IR_P(x) ((x) & 0x1f)
81
82
83#define IR_MODE_INV (1 << 0)
84#define IR_ONE_PIN (1 << 1)
85#define IR_PHYCLK_40MHZ (0 << 2)
86#define IR_PHYCLK_48MHZ (1 << 2)
87#define IR_PHYCLK_56MHZ (2 << 2)
88#define IR_PHYCLK_64MHZ (3 << 2)
89#define IR_DP (1 << 4)
90#define IR_DA (1 << 5)
91#define IR_FLT_HIGH (0 << 6)
92#define IR_FLT_MEDHI (1 << 6)
93#define IR_FLT_MEDLO (2 << 6)
94#define IR_FLT_LO (3 << 6)
95#define IR_IEN (1 << 8)
96
97
98#define IR_HC (1 << 3)
99#define IR_CE (1 << 2)
100#define IR_C (1 << 1)
101#define IR_BE (1 << 0)
102
103#define NUM_IR_DESC 64
104#define RING_SIZE_4 0x0
105#define RING_SIZE_16 0x3
106#define RING_SIZE_64 0xF
107#define MAX_NUM_IR_DESC 64
108#define MAX_BUF_SIZE 2048
109
110
111#define AU_OWN (1 << 7)
112#define IR_DIS_CRC (1 << 6)
113#define IR_BAD_CRC (1 << 5)
114#define IR_NEED_PULSE (1 << 4)
115#define IR_FORCE_UNDER (1 << 3)
116#define IR_DISABLE_TX (1 << 2)
117#define IR_HW_UNDER (1 << 0)
118#define IR_TX_ERROR (IR_DIS_CRC | IR_BAD_CRC | IR_HW_UNDER)
119
120#define IR_PHY_ERROR (1 << 6)
121#define IR_CRC_ERROR (1 << 5)
122#define IR_MAX_LEN (1 << 4)
123#define IR_FIFO_OVER (1 << 3)
124#define IR_SIR_ERROR (1 << 2)
125#define IR_RX_ERROR (IR_PHY_ERROR | IR_CRC_ERROR | \
126 IR_MAX_LEN | IR_FIFO_OVER | IR_SIR_ERROR)
127
128struct db_dest {
129 struct db_dest *pnext;
130 volatile u32 *vaddr;
131 dma_addr_t dma_addr;
132};
133
134struct ring_dest {
135 u8 count_0;
136 u8 count_1;
137 u8 reserved;
138 u8 flags;
139 u8 addr_0;
140 u8 addr_1;
141 u8 addr_2;
142 u8 addr_3;
143};
144
145
146struct au1k_private {
147 void __iomem *iobase;
148 int irq_rx, irq_tx;
149
150 struct db_dest *pDBfree;
151 struct db_dest db[2 * NUM_IR_DESC];
152 volatile struct ring_dest *rx_ring[NUM_IR_DESC];
153 volatile struct ring_dest *tx_ring[NUM_IR_DESC];
154 struct db_dest *rx_db_inuse[NUM_IR_DESC];
155 struct db_dest *tx_db_inuse[NUM_IR_DESC];
156 u32 rx_head;
157 u32 tx_head;
158 u32 tx_tail;
159 u32 tx_full;
160
161 iobuff_t rx_buff;
162
163 struct net_device *netdev;
164 struct qos_info qos;
165 struct irlap_cb *irlap;
166
167 u8 open;
168 u32 speed;
169 u32 newspeed;
170
171 struct resource *ioarea;
172 struct au1k_irda_platform_data *platdata;
173 struct clk *irda_clk;
174};
175
176static int qos_mtt_bits = 0x07;
177
178static void au1k_irda_plat_set_phy_mode(struct au1k_private *p, int mode)
179{
180 if (p->platdata && p->platdata->set_phy_mode)
181 p->platdata->set_phy_mode(mode);
182}
183
184static inline unsigned long irda_read(struct au1k_private *p,
185 unsigned long ofs)
186{
187
188
189
190
191 (void)__raw_readl(p->iobase + ofs);
192 return __raw_readl(p->iobase + ofs);
193}
194
195static inline void irda_write(struct au1k_private *p, unsigned long ofs,
196 unsigned long val)
197{
198 __raw_writel(val, p->iobase + ofs);
199 wmb();
200}
201
202
203
204
205
206
207static struct db_dest *GetFreeDB(struct au1k_private *aup)
208{
209 struct db_dest *db;
210 db = aup->pDBfree;
211
212 if (db)
213 aup->pDBfree = db->pnext;
214 return db;
215}
216
217
218
219
220
221
222static void *dma_alloc(size_t size, dma_addr_t *dma_handle)
223{
224 void *ret;
225 int gfp = GFP_ATOMIC | GFP_DMA;
226
227 ret = (void *)__get_free_pages(gfp, get_order(size));
228
229 if (ret != NULL) {
230 memset(ret, 0, size);
231 *dma_handle = virt_to_bus(ret);
232 ret = (void *)KSEG0ADDR(ret);
233 }
234 return ret;
235}
236
237static void dma_free(void *vaddr, size_t size)
238{
239 vaddr = (void *)KSEG0ADDR(vaddr);
240 free_pages((unsigned long) vaddr, get_order(size));
241}
242
243
244static void setup_hw_rings(struct au1k_private *aup, u32 rx_base, u32 tx_base)
245{
246 int i;
247 for (i = 0; i < NUM_IR_DESC; i++) {
248 aup->rx_ring[i] = (volatile struct ring_dest *)
249 (rx_base + sizeof(struct ring_dest) * i);
250 }
251 for (i = 0; i < NUM_IR_DESC; i++) {
252 aup->tx_ring[i] = (volatile struct ring_dest *)
253 (tx_base + sizeof(struct ring_dest) * i);
254 }
255}
256
257static int au1k_irda_init_iobuf(iobuff_t *io, int size)
258{
259 io->head = kmalloc(size, GFP_KERNEL);
260 if (io->head != NULL) {
261 io->truesize = size;
262 io->in_frame = FALSE;
263 io->state = OUTSIDE_FRAME;
264 io->data = io->head;
265 }
266 return io->head ? 0 : -ENOMEM;
267}
268
269
270
271
272static int au1k_irda_set_speed(struct net_device *dev, int speed)
273{
274 struct au1k_private *aup = netdev_priv(dev);
275 volatile struct ring_dest *ptxd;
276 unsigned long control;
277 int ret = 0, timeout = 10, i;
278
279 if (speed == aup->speed)
280 return ret;
281
282
283 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
284 irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN);
285
286
287 irda_write(aup, IR_CONFIG_1,
288 irda_read(aup, IR_CONFIG_1) & ~(IR_RX_ENABLE | IR_TX_ENABLE));
289 msleep(20);
290 while (irda_read(aup, IR_STATUS) & (IR_RX_STATUS | IR_TX_STATUS)) {
291 msleep(20);
292 if (!timeout--) {
293 printk(KERN_ERR "%s: rx/tx disable timeout\n",
294 dev->name);
295 break;
296 }
297 }
298
299
300 irda_write(aup, IR_CONFIG_1,
301 irda_read(aup, IR_CONFIG_1) & ~IR_DMA_ENABLE);
302 msleep(20);
303
304
305 aup->tx_head = aup->tx_tail = aup->rx_head = 0;
306 for (i = 0; i < NUM_IR_DESC; i++) {
307 ptxd = aup->tx_ring[i];
308 ptxd->flags = 0;
309 ptxd->count_0 = 0;
310 ptxd->count_1 = 0;
311 }
312
313 for (i = 0; i < NUM_IR_DESC; i++) {
314 ptxd = aup->rx_ring[i];
315 ptxd->count_0 = 0;
316 ptxd->count_1 = 0;
317 ptxd->flags = AU_OWN;
318 }
319
320 if (speed == 4000000)
321 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_FIR);
322 else
323 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR);
324
325 switch (speed) {
326 case 9600:
327 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(11) | IR_PW(12));
328 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
329 break;
330 case 19200:
331 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(5) | IR_PW(12));
332 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
333 break;
334 case 38400:
335 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(2) | IR_PW(12));
336 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
337 break;
338 case 57600:
339 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(1) | IR_PW(12));
340 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
341 break;
342 case 115200:
343 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_PW(12));
344 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
345 break;
346 case 4000000:
347 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_P(15));
348 irda_write(aup, IR_CONFIG_1, IR_FIR | IR_DMA_ENABLE |
349 IR_RX_ENABLE);
350 break;
351 default:
352 printk(KERN_ERR "%s unsupported speed %x\n", dev->name, speed);
353 ret = -EINVAL;
354 break;
355 }
356
357 aup->speed = speed;
358 irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) | IR_PHYEN);
359
360 control = irda_read(aup, IR_STATUS);
361 irda_write(aup, IR_RING_PROMPT, 0);
362
363 if (control & (1 << 14)) {
364 printk(KERN_ERR "%s: configuration error\n", dev->name);
365 } else {
366 if (control & (1 << 11))
367 printk(KERN_DEBUG "%s Valid SIR config\n", dev->name);
368 if (control & (1 << 12))
369 printk(KERN_DEBUG "%s Valid MIR config\n", dev->name);
370 if (control & (1 << 13))
371 printk(KERN_DEBUG "%s Valid FIR config\n", dev->name);
372 if (control & (1 << 10))
373 printk(KERN_DEBUG "%s TX enabled\n", dev->name);
374 if (control & (1 << 9))
375 printk(KERN_DEBUG "%s RX enabled\n", dev->name);
376 }
377
378 return ret;
379}
380
381static void update_rx_stats(struct net_device *dev, u32 status, u32 count)
382{
383 struct net_device_stats *ps = &dev->stats;
384
385 ps->rx_packets++;
386
387 if (status & IR_RX_ERROR) {
388 ps->rx_errors++;
389 if (status & (IR_PHY_ERROR | IR_FIFO_OVER))
390 ps->rx_missed_errors++;
391 if (status & IR_MAX_LEN)
392 ps->rx_length_errors++;
393 if (status & IR_CRC_ERROR)
394 ps->rx_crc_errors++;
395 } else
396 ps->rx_bytes += count;
397}
398
399static void update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len)
400{
401 struct net_device_stats *ps = &dev->stats;
402
403 ps->tx_packets++;
404 ps->tx_bytes += pkt_len;
405
406 if (status & IR_TX_ERROR) {
407 ps->tx_errors++;
408 ps->tx_aborted_errors++;
409 }
410}
411
412static void au1k_tx_ack(struct net_device *dev)
413{
414 struct au1k_private *aup = netdev_priv(dev);
415 volatile struct ring_dest *ptxd;
416
417 ptxd = aup->tx_ring[aup->tx_tail];
418 while (!(ptxd->flags & AU_OWN) && (aup->tx_tail != aup->tx_head)) {
419 update_tx_stats(dev, ptxd->flags,
420 (ptxd->count_1 << 8) | ptxd->count_0);
421 ptxd->count_0 = 0;
422 ptxd->count_1 = 0;
423 wmb();
424 aup->tx_tail = (aup->tx_tail + 1) & (NUM_IR_DESC - 1);
425 ptxd = aup->tx_ring[aup->tx_tail];
426
427 if (aup->tx_full) {
428 aup->tx_full = 0;
429 netif_wake_queue(dev);
430 }
431 }
432
433 if (aup->tx_tail == aup->tx_head) {
434 if (aup->newspeed) {
435 au1k_irda_set_speed(dev, aup->newspeed);
436 aup->newspeed = 0;
437 } else {
438 irda_write(aup, IR_CONFIG_1,
439 irda_read(aup, IR_CONFIG_1) & ~IR_TX_ENABLE);
440 irda_write(aup, IR_CONFIG_1,
441 irda_read(aup, IR_CONFIG_1) | IR_RX_ENABLE);
442 irda_write(aup, IR_RING_PROMPT, 0);
443 }
444 }
445}
446
447static int au1k_irda_rx(struct net_device *dev)
448{
449 struct au1k_private *aup = netdev_priv(dev);
450 volatile struct ring_dest *prxd;
451 struct sk_buff *skb;
452 struct db_dest *pDB;
453 u32 flags, count;
454
455 prxd = aup->rx_ring[aup->rx_head];
456 flags = prxd->flags;
457
458 while (!(flags & AU_OWN)) {
459 pDB = aup->rx_db_inuse[aup->rx_head];
460 count = (prxd->count_1 << 8) | prxd->count_0;
461 if (!(flags & IR_RX_ERROR)) {
462
463 update_rx_stats(dev, flags, count);
464 skb = alloc_skb(count + 1, GFP_ATOMIC);
465 if (skb == NULL) {
466 dev->stats.rx_dropped++;
467 continue;
468 }
469 skb_reserve(skb, 1);
470 if (aup->speed == 4000000)
471 skb_put(skb, count);
472 else
473 skb_put(skb, count - 2);
474 skb_copy_to_linear_data(skb, (void *)pDB->vaddr,
475 count - 2);
476 skb->dev = dev;
477 skb_reset_mac_header(skb);
478 skb->protocol = htons(ETH_P_IRDA);
479 netif_rx(skb);
480 prxd->count_0 = 0;
481 prxd->count_1 = 0;
482 }
483 prxd->flags |= AU_OWN;
484 aup->rx_head = (aup->rx_head + 1) & (NUM_IR_DESC - 1);
485 irda_write(aup, IR_RING_PROMPT, 0);
486
487
488 prxd = aup->rx_ring[aup->rx_head];
489 flags = prxd->flags;
490
491 }
492 return 0;
493}
494
495static irqreturn_t au1k_irda_interrupt(int dummy, void *dev_id)
496{
497 struct net_device *dev = dev_id;
498 struct au1k_private *aup = netdev_priv(dev);
499
500 irda_write(aup, IR_INT_CLEAR, 0);
501
502 au1k_irda_rx(dev);
503 au1k_tx_ack(dev);
504
505 return IRQ_HANDLED;
506}
507
508static int au1k_init(struct net_device *dev)
509{
510 struct au1k_private *aup = netdev_priv(dev);
511 u32 enable, ring_address, phyck;
512 struct clk *c;
513 int i;
514
515 c = clk_get(NULL, "irda_clk");
516 if (IS_ERR(c))
517 return PTR_ERR(c);
518 i = clk_prepare_enable(c);
519 if (i) {
520 clk_put(c);
521 return i;
522 }
523
524 switch (clk_get_rate(c)) {
525 case 40000000:
526 phyck = IR_PHYCLK_40MHZ;
527 break;
528 case 48000000:
529 phyck = IR_PHYCLK_48MHZ;
530 break;
531 case 56000000:
532 phyck = IR_PHYCLK_56MHZ;
533 break;
534 case 64000000:
535 phyck = IR_PHYCLK_64MHZ;
536 break;
537 default:
538 clk_disable_unprepare(c);
539 clk_put(c);
540 return -EINVAL;
541 }
542 aup->irda_clk = c;
543
544 enable = IR_HC | IR_CE | IR_C;
545#ifndef CONFIG_CPU_LITTLE_ENDIAN
546 enable |= IR_BE;
547#endif
548 aup->tx_head = 0;
549 aup->tx_tail = 0;
550 aup->rx_head = 0;
551
552 for (i = 0; i < NUM_IR_DESC; i++)
553 aup->rx_ring[i]->flags = AU_OWN;
554
555 irda_write(aup, IR_ENABLE, enable);
556 msleep(20);
557
558
559 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
560 irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN);
561 msleep(20);
562
563 irda_write(aup, IR_MAX_PKT_LEN, MAX_BUF_SIZE);
564
565 ring_address = (u32)virt_to_phys((void *)aup->rx_ring[0]);
566 irda_write(aup, IR_RING_BASE_ADDR_H, ring_address >> 26);
567 irda_write(aup, IR_RING_BASE_ADDR_L, (ring_address >> 10) & 0xffff);
568
569 irda_write(aup, IR_RING_SIZE,
570 (RING_SIZE_64 << 8) | (RING_SIZE_64 << 12));
571
572 irda_write(aup, IR_CONFIG_2, phyck | IR_ONE_PIN);
573 irda_write(aup, IR_RING_ADDR_CMPR, 0);
574
575 au1k_irda_set_speed(dev, 9600);
576 return 0;
577}
578
579static int au1k_irda_start(struct net_device *dev)
580{
581 struct au1k_private *aup = netdev_priv(dev);
582 char hwname[32];
583 int retval;
584
585 retval = au1k_init(dev);
586 if (retval) {
587 printk(KERN_ERR "%s: error in au1k_init\n", dev->name);
588 return retval;
589 }
590
591 retval = request_irq(aup->irq_tx, &au1k_irda_interrupt, 0,
592 dev->name, dev);
593 if (retval) {
594 printk(KERN_ERR "%s: unable to get IRQ %d\n",
595 dev->name, dev->irq);
596 return retval;
597 }
598 retval = request_irq(aup->irq_rx, &au1k_irda_interrupt, 0,
599 dev->name, dev);
600 if (retval) {
601 free_irq(aup->irq_tx, dev);
602 printk(KERN_ERR "%s: unable to get IRQ %d\n",
603 dev->name, dev->irq);
604 return retval;
605 }
606
607
608 sprintf(hwname, "Au1000 SIR/FIR");
609 aup->irlap = irlap_open(dev, &aup->qos, hwname);
610 netif_start_queue(dev);
611
612
613 irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) | IR_IEN);
614
615
616 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR);
617
618 return 0;
619}
620
621static int au1k_irda_stop(struct net_device *dev)
622{
623 struct au1k_private *aup = netdev_priv(dev);
624
625 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
626
627
628 irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) & ~IR_IEN);
629 irda_write(aup, IR_CONFIG_1, 0);
630 irda_write(aup, IR_ENABLE, 0);
631
632 if (aup->irlap) {
633 irlap_close(aup->irlap);
634 aup->irlap = NULL;
635 }
636
637 netif_stop_queue(dev);
638
639
640 free_irq(aup->irq_tx, dev);
641 free_irq(aup->irq_rx, dev);
642
643 clk_disable_unprepare(aup->irda_clk);
644 clk_put(aup->irda_clk);
645
646 return 0;
647}
648
649
650
651
652static int au1k_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
653{
654 struct au1k_private *aup = netdev_priv(dev);
655 int speed = irda_get_next_speed(skb);
656 volatile struct ring_dest *ptxd;
657 struct db_dest *pDB;
658 u32 len, flags;
659
660 if (speed != aup->speed && speed != -1)
661 aup->newspeed = speed;
662
663 if ((skb->len == 0) && (aup->newspeed)) {
664 if (aup->tx_tail == aup->tx_head) {
665 au1k_irda_set_speed(dev, speed);
666 aup->newspeed = 0;
667 }
668 dev_kfree_skb(skb);
669 return NETDEV_TX_OK;
670 }
671
672 ptxd = aup->tx_ring[aup->tx_head];
673 flags = ptxd->flags;
674
675 if (flags & AU_OWN) {
676 printk(KERN_DEBUG "%s: tx_full\n", dev->name);
677 netif_stop_queue(dev);
678 aup->tx_full = 1;
679 return 1;
680 } else if (((aup->tx_head + 1) & (NUM_IR_DESC - 1)) == aup->tx_tail) {
681 printk(KERN_DEBUG "%s: tx_full\n", dev->name);
682 netif_stop_queue(dev);
683 aup->tx_full = 1;
684 return 1;
685 }
686
687 pDB = aup->tx_db_inuse[aup->tx_head];
688
689#if 0
690 if (irda_read(aup, IR_RX_BYTE_CNT) != 0) {
691 printk(KERN_DEBUG "tx warning: rx byte cnt %x\n",
692 irda_read(aup, IR_RX_BYTE_CNT));
693 }
694#endif
695
696 if (aup->speed == 4000000) {
697
698 skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len);
699 ptxd->count_0 = skb->len & 0xff;
700 ptxd->count_1 = (skb->len >> 8) & 0xff;
701 } else {
702
703 len = async_wrap_skb(skb, (u8 *)pDB->vaddr, MAX_BUF_SIZE);
704 ptxd->count_0 = len & 0xff;
705 ptxd->count_1 = (len >> 8) & 0xff;
706 ptxd->flags |= IR_DIS_CRC;
707 }
708 ptxd->flags |= AU_OWN;
709 wmb();
710
711 irda_write(aup, IR_CONFIG_1,
712 irda_read(aup, IR_CONFIG_1) | IR_TX_ENABLE);
713 irda_write(aup, IR_RING_PROMPT, 0);
714
715 dev_kfree_skb(skb);
716 aup->tx_head = (aup->tx_head + 1) & (NUM_IR_DESC - 1);
717 return NETDEV_TX_OK;
718}
719
720
721
722
723
724static void au1k_tx_timeout(struct net_device *dev)
725{
726 u32 speed;
727 struct au1k_private *aup = netdev_priv(dev);
728
729 printk(KERN_ERR "%s: tx timeout\n", dev->name);
730 speed = aup->speed;
731 aup->speed = 0;
732 au1k_irda_set_speed(dev, speed);
733 aup->tx_full = 0;
734 netif_wake_queue(dev);
735}
736
737static int au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
738{
739 struct if_irda_req *rq = (struct if_irda_req *)ifreq;
740 struct au1k_private *aup = netdev_priv(dev);
741 int ret = -EOPNOTSUPP;
742
743 switch (cmd) {
744 case SIOCSBANDWIDTH:
745 if (capable(CAP_NET_ADMIN)) {
746
747
748
749
750 if (aup->open)
751 ret = au1k_irda_set_speed(dev,
752 rq->ifr_baudrate);
753 else {
754 printk(KERN_ERR "%s ioctl: !netif_running\n",
755 dev->name);
756 ret = 0;
757 }
758 }
759 break;
760
761 case SIOCSMEDIABUSY:
762 ret = -EPERM;
763 if (capable(CAP_NET_ADMIN)) {
764 irda_device_set_media_busy(dev, TRUE);
765 ret = 0;
766 }
767 break;
768
769 case SIOCGRECEIVING:
770 rq->ifr_receiving = 0;
771 break;
772 default:
773 break;
774 }
775 return ret;
776}
777
778static const struct net_device_ops au1k_irda_netdev_ops = {
779 .ndo_open = au1k_irda_start,
780 .ndo_stop = au1k_irda_stop,
781 .ndo_start_xmit = au1k_irda_hard_xmit,
782 .ndo_tx_timeout = au1k_tx_timeout,
783 .ndo_do_ioctl = au1k_irda_ioctl,
784};
785
786static int au1k_irda_net_init(struct net_device *dev)
787{
788 struct au1k_private *aup = netdev_priv(dev);
789 struct db_dest *pDB, *pDBfree;
790 int i, err, retval = 0;
791 dma_addr_t temp;
792
793 err = au1k_irda_init_iobuf(&aup->rx_buff, 14384);
794 if (err)
795 goto out1;
796
797 dev->netdev_ops = &au1k_irda_netdev_ops;
798
799 irda_init_max_qos_capabilies(&aup->qos);
800
801
802 aup->qos.baud_rate.bits = IR_9600 | IR_19200 | IR_38400 |
803 IR_57600 | IR_115200 | IR_576000 | (IR_4000000 << 8);
804
805 aup->qos.min_turn_time.bits = qos_mtt_bits;
806 irda_qos_bits_to_value(&aup->qos);
807
808 retval = -ENOMEM;
809
810
811
812 aup->rx_ring[0] = (struct ring_dest *)
813 dma_alloc(2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)),
814 &temp);
815 if (!aup->rx_ring[0])
816 goto out2;
817
818
819 aup->db[0].vaddr =
820 dma_alloc(MAX_BUF_SIZE * 2 * NUM_IR_DESC, &temp);
821 if (!aup->db[0].vaddr)
822 goto out3;
823
824 setup_hw_rings(aup, (u32)aup->rx_ring[0], (u32)aup->rx_ring[0] + 512);
825
826 pDBfree = NULL;
827 pDB = aup->db;
828 for (i = 0; i < (2 * NUM_IR_DESC); i++) {
829 pDB->pnext = pDBfree;
830 pDBfree = pDB;
831 pDB->vaddr =
832 (u32 *)((unsigned)aup->db[0].vaddr + (MAX_BUF_SIZE * i));
833 pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
834 pDB++;
835 }
836 aup->pDBfree = pDBfree;
837
838
839 for (i = 0; i < NUM_IR_DESC; i++) {
840 pDB = GetFreeDB(aup);
841 if (!pDB)
842 goto out3;
843 aup->rx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
844 aup->rx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff);
845 aup->rx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff);
846 aup->rx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff);
847 aup->rx_db_inuse[i] = pDB;
848 }
849 for (i = 0; i < NUM_IR_DESC; i++) {
850 pDB = GetFreeDB(aup);
851 if (!pDB)
852 goto out3;
853 aup->tx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
854 aup->tx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff);
855 aup->tx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff);
856 aup->tx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff);
857 aup->tx_ring[i]->count_0 = 0;
858 aup->tx_ring[i]->count_1 = 0;
859 aup->tx_ring[i]->flags = 0;
860 aup->tx_db_inuse[i] = pDB;
861 }
862
863 return 0;
864
865out3:
866 dma_free((void *)aup->rx_ring[0],
867 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
868out2:
869 kfree(aup->rx_buff.head);
870out1:
871 printk(KERN_ERR "au1k_irda_net_init() failed. Returns %d\n", retval);
872 return retval;
873}
874
875static int au1k_irda_probe(struct platform_device *pdev)
876{
877 struct au1k_private *aup;
878 struct net_device *dev;
879 struct resource *r;
880 struct clk *c;
881 int err;
882
883 dev = alloc_irdadev(sizeof(struct au1k_private));
884 if (!dev)
885 return -ENOMEM;
886
887 aup = netdev_priv(dev);
888
889 aup->platdata = pdev->dev.platform_data;
890
891 err = -EINVAL;
892 r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
893 if (!r)
894 goto out;
895
896 aup->irq_tx = r->start;
897
898 r = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
899 if (!r)
900 goto out;
901
902 aup->irq_rx = r->start;
903
904 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
905 if (!r)
906 goto out;
907
908 err = -EBUSY;
909 aup->ioarea = request_mem_region(r->start, resource_size(r),
910 pdev->name);
911 if (!aup->ioarea)
912 goto out;
913
914
915 c = clk_get(NULL, "irda_clk");
916 if (IS_ERR(c)) {
917 err = PTR_ERR(c);
918 goto out;
919 }
920 clk_put(c);
921
922 aup->iobase = ioremap_nocache(r->start, resource_size(r));
923 if (!aup->iobase)
924 goto out2;
925
926 dev->irq = aup->irq_rx;
927
928 err = au1k_irda_net_init(dev);
929 if (err)
930 goto out3;
931 err = register_netdev(dev);
932 if (err)
933 goto out4;
934
935 platform_set_drvdata(pdev, dev);
936
937 printk(KERN_INFO "IrDA: Registered device %s\n", dev->name);
938 return 0;
939
940out4:
941 dma_free((void *)aup->db[0].vaddr,
942 MAX_BUF_SIZE * 2 * NUM_IR_DESC);
943 dma_free((void *)aup->rx_ring[0],
944 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
945 kfree(aup->rx_buff.head);
946out3:
947 iounmap(aup->iobase);
948out2:
949 release_resource(aup->ioarea);
950 kfree(aup->ioarea);
951out:
952 free_netdev(dev);
953 return err;
954}
955
956static int au1k_irda_remove(struct platform_device *pdev)
957{
958 struct net_device *dev = platform_get_drvdata(pdev);
959 struct au1k_private *aup = netdev_priv(dev);
960
961 unregister_netdev(dev);
962
963 dma_free((void *)aup->db[0].vaddr,
964 MAX_BUF_SIZE * 2 * NUM_IR_DESC);
965 dma_free((void *)aup->rx_ring[0],
966 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
967 kfree(aup->rx_buff.head);
968
969 iounmap(aup->iobase);
970 release_resource(aup->ioarea);
971 kfree(aup->ioarea);
972
973 free_netdev(dev);
974
975 return 0;
976}
977
978static struct platform_driver au1k_irda_driver = {
979 .driver = {
980 .name = "au1000-irda",
981 },
982 .probe = au1k_irda_probe,
983 .remove = au1k_irda_remove,
984};
985
986module_platform_driver(au1k_irda_driver);
987
988MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
989MODULE_DESCRIPTION("Au1000 IrDA Device Driver");
990
