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6f475c01 NP |
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> | |
d052d1be | 25 | #include <linux/platform_device.h> |
6f475c01 NP |
26 | #include <linux/pm.h> |
27 | ||
28 | #include <net/irda/irda.h> | |
29 | #include <net/irda/irmod.h> | |
30 | #include <net/irda/wrapper.h> | |
31 | #include <net/irda/irda_device.h> | |
32 | ||
33 | #include <asm/irq.h> | |
34 | #include <asm/dma.h> | |
35 | #include <asm/delay.h> | |
36 | #include <asm/hardware.h> | |
37 | #include <asm/arch/irda.h> | |
38 | #include <asm/arch/pxa-regs.h> | |
39 | ||
40 | #ifdef CONFIG_MACH_MAINSTONE | |
41 | #include <asm/arch/mainstone.h> | |
42 | #endif | |
43 | ||
44 | #define IrSR_RXPL_NEG_IS_ZERO (1<<4) | |
45 | #define IrSR_RXPL_POS_IS_ZERO 0x0 | |
46 | #define IrSR_TXPL_NEG_IS_ZERO (1<<3) | |
47 | #define IrSR_TXPL_POS_IS_ZERO 0x0 | |
48 | #define IrSR_XMODE_PULSE_1_6 (1<<2) | |
49 | #define IrSR_XMODE_PULSE_3_16 0x0 | |
50 | #define IrSR_RCVEIR_IR_MODE (1<<1) | |
51 | #define IrSR_RCVEIR_UART_MODE 0x0 | |
52 | #define IrSR_XMITIR_IR_MODE (1<<0) | |
53 | #define IrSR_XMITIR_UART_MODE 0x0 | |
54 | ||
55 | #define IrSR_IR_RECEIVE_ON (\ | |
56 | IrSR_RXPL_NEG_IS_ZERO | \ | |
57 | IrSR_TXPL_POS_IS_ZERO | \ | |
58 | IrSR_XMODE_PULSE_3_16 | \ | |
59 | IrSR_RCVEIR_IR_MODE | \ | |
60 | IrSR_XMITIR_UART_MODE) | |
61 | ||
62 | #define IrSR_IR_TRANSMIT_ON (\ | |
63 | IrSR_RXPL_NEG_IS_ZERO | \ | |
64 | IrSR_TXPL_POS_IS_ZERO | \ | |
65 | IrSR_XMODE_PULSE_3_16 | \ | |
66 | IrSR_RCVEIR_UART_MODE | \ | |
67 | IrSR_XMITIR_IR_MODE) | |
68 | ||
69 | struct pxa_irda { | |
70 | int speed; | |
71 | int newspeed; | |
72 | unsigned long last_oscr; | |
73 | ||
74 | unsigned char *dma_rx_buff; | |
75 | unsigned char *dma_tx_buff; | |
76 | dma_addr_t dma_rx_buff_phy; | |
77 | dma_addr_t dma_tx_buff_phy; | |
78 | unsigned int dma_tx_buff_len; | |
79 | int txdma; | |
80 | int rxdma; | |
81 | ||
82 | struct net_device_stats stats; | |
83 | struct irlap_cb *irlap; | |
84 | struct qos_info qos; | |
85 | ||
86 | iobuff_t tx_buff; | |
87 | iobuff_t rx_buff; | |
88 | ||
89 | struct device *dev; | |
90 | struct pxaficp_platform_data *pdata; | |
91 | }; | |
92 | ||
93 | ||
94 | #define IS_FIR(si) ((si)->speed >= 4000000) | |
95 | #define IRDA_FRAME_SIZE_LIMIT 2047 | |
96 | ||
97 | inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si) | |
98 | { | |
99 | DCSR(si->rxdma) = DCSR_NODESC; | |
100 | DSADR(si->rxdma) = __PREG(ICDR); | |
101 | DTADR(si->rxdma) = si->dma_rx_buff_phy; | |
102 | DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT; | |
103 | DCSR(si->rxdma) |= DCSR_RUN; | |
104 | } | |
105 | ||
106 | inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si) | |
107 | { | |
108 | DCSR(si->txdma) = DCSR_NODESC; | |
109 | DSADR(si->txdma) = si->dma_tx_buff_phy; | |
110 | DTADR(si->txdma) = __PREG(ICDR); | |
111 | DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len; | |
112 | DCSR(si->txdma) |= DCSR_RUN; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Set the IrDA communications speed. | |
117 | */ | |
118 | static int pxa_irda_set_speed(struct pxa_irda *si, int speed) | |
119 | { | |
120 | unsigned long flags; | |
121 | unsigned int divisor; | |
122 | ||
123 | switch (speed) { | |
124 | case 9600: case 19200: case 38400: | |
125 | case 57600: case 115200: | |
126 | ||
127 | /* refer to PXA250/210 Developer's Manual 10-7 */ | |
128 | /* BaudRate = 14.7456 MHz / (16*Divisor) */ | |
129 | divisor = 14745600 / (16 * speed); | |
130 | ||
131 | local_irq_save(flags); | |
132 | ||
133 | if (IS_FIR(si)) { | |
134 | /* stop RX DMA */ | |
135 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
136 | /* disable FICP */ | |
137 | ICCR0 = 0; | |
138 | pxa_set_cken(CKEN13_FICP, 0); | |
139 | ||
140 | /* set board transceiver to SIR mode */ | |
141 | si->pdata->transceiver_mode(si->dev, IR_SIRMODE); | |
142 | ||
143 | /* configure GPIO46/47 */ | |
144 | pxa_gpio_mode(GPIO46_STRXD_MD); | |
145 | pxa_gpio_mode(GPIO47_STTXD_MD); | |
146 | ||
147 | /* enable the STUART clock */ | |
148 | pxa_set_cken(CKEN5_STUART, 1); | |
149 | } | |
150 | ||
151 | /* disable STUART first */ | |
152 | STIER = 0; | |
153 | ||
154 | /* access DLL & DLH */ | |
155 | STLCR |= LCR_DLAB; | |
156 | STDLL = divisor & 0xff; | |
157 | STDLH = divisor >> 8; | |
158 | STLCR &= ~LCR_DLAB; | |
159 | ||
160 | si->speed = speed; | |
161 | STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; | |
162 | STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; | |
163 | ||
164 | local_irq_restore(flags); | |
165 | break; | |
166 | ||
167 | case 4000000: | |
168 | local_irq_save(flags); | |
169 | ||
170 | /* disable STUART */ | |
171 | STIER = 0; | |
172 | STISR = 0; | |
173 | pxa_set_cken(CKEN5_STUART, 0); | |
174 | ||
175 | /* disable FICP first */ | |
176 | ICCR0 = 0; | |
177 | ||
178 | /* set board transceiver to FIR mode */ | |
179 | si->pdata->transceiver_mode(si->dev, IR_FIRMODE); | |
180 | ||
181 | /* configure GPIO46/47 */ | |
182 | pxa_gpio_mode(GPIO46_ICPRXD_MD); | |
183 | pxa_gpio_mode(GPIO47_ICPTXD_MD); | |
184 | ||
185 | /* enable the FICP clock */ | |
186 | pxa_set_cken(CKEN13_FICP, 1); | |
187 | ||
188 | si->speed = speed; | |
189 | pxa_irda_fir_dma_rx_start(si); | |
190 | ICCR0 = ICCR0_ITR | ICCR0_RXE; | |
191 | ||
192 | local_irq_restore(flags); | |
193 | break; | |
194 | ||
195 | default: | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | /* SIR interrupt service routine. */ | |
203 | static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id, struct pt_regs *regs) | |
204 | { | |
205 | struct net_device *dev = dev_id; | |
206 | struct pxa_irda *si = netdev_priv(dev); | |
207 | int iir, lsr, data; | |
208 | ||
209 | iir = STIIR; | |
210 | ||
211 | switch (iir & 0x0F) { | |
212 | case 0x06: /* Receiver Line Status */ | |
213 | lsr = STLSR; | |
214 | while (lsr & LSR_FIFOE) { | |
215 | data = STRBR; | |
216 | if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) { | |
217 | printk(KERN_DEBUG "pxa_ir: sir receiving error\n"); | |
218 | si->stats.rx_errors++; | |
219 | if (lsr & LSR_FE) | |
220 | si->stats.rx_frame_errors++; | |
221 | if (lsr & LSR_OE) | |
222 | si->stats.rx_fifo_errors++; | |
223 | } else { | |
224 | si->stats.rx_bytes++; | |
225 | async_unwrap_char(dev, &si->stats, &si->rx_buff, data); | |
226 | } | |
227 | lsr = STLSR; | |
228 | } | |
229 | dev->last_rx = jiffies; | |
230 | si->last_oscr = OSCR; | |
231 | break; | |
232 | ||
233 | case 0x04: /* Received Data Available */ | |
234 | /* forth through */ | |
235 | ||
236 | case 0x0C: /* Character Timeout Indication */ | |
237 | do { | |
238 | si->stats.rx_bytes++; | |
239 | async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR); | |
240 | } while (STLSR & LSR_DR); | |
241 | dev->last_rx = jiffies; | |
242 | si->last_oscr = OSCR; | |
243 | break; | |
244 | ||
245 | case 0x02: /* Transmit FIFO Data Request */ | |
246 | while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) { | |
247 | STTHR = *si->tx_buff.data++; | |
248 | si->tx_buff.len -= 1; | |
249 | } | |
250 | ||
251 | if (si->tx_buff.len == 0) { | |
252 | si->stats.tx_packets++; | |
253 | si->stats.tx_bytes += si->tx_buff.data - | |
254 | si->tx_buff.head; | |
255 | ||
256 | /* We need to ensure that the transmitter has finished. */ | |
257 | while ((STLSR & LSR_TEMT) == 0) | |
258 | cpu_relax(); | |
259 | si->last_oscr = OSCR; | |
260 | ||
261 | /* | |
262 | * Ok, we've finished transmitting. Now enable | |
263 | * the receiver. Sometimes we get a receive IRQ | |
264 | * immediately after a transmit... | |
265 | */ | |
266 | if (si->newspeed) { | |
267 | pxa_irda_set_speed(si, si->newspeed); | |
268 | si->newspeed = 0; | |
269 | } else { | |
270 | /* enable IR Receiver, disable IR Transmitter */ | |
271 | STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; | |
272 | /* enable STUART and receive interrupts */ | |
273 | STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; | |
274 | } | |
275 | /* I'm hungry! */ | |
276 | netif_wake_queue(dev); | |
277 | } | |
278 | break; | |
279 | } | |
280 | ||
281 | return IRQ_HANDLED; | |
282 | } | |
283 | ||
284 | /* FIR Receive DMA interrupt handler */ | |
285 | static void pxa_irda_fir_dma_rx_irq(int channel, void *data, struct pt_regs *regs) | |
286 | { | |
287 | int dcsr = DCSR(channel); | |
288 | ||
289 | DCSR(channel) = dcsr & ~DCSR_RUN; | |
290 | ||
291 | printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr); | |
292 | } | |
293 | ||
294 | /* FIR Transmit DMA interrupt handler */ | |
295 | static void pxa_irda_fir_dma_tx_irq(int channel, void *data, struct pt_regs *regs) | |
296 | { | |
297 | struct net_device *dev = data; | |
298 | struct pxa_irda *si = netdev_priv(dev); | |
299 | int dcsr; | |
300 | ||
301 | dcsr = DCSR(channel); | |
302 | DCSR(channel) = dcsr & ~DCSR_RUN; | |
303 | ||
304 | if (dcsr & DCSR_ENDINTR) { | |
305 | si->stats.tx_packets++; | |
306 | si->stats.tx_bytes += si->dma_tx_buff_len; | |
307 | } else { | |
308 | si->stats.tx_errors++; | |
309 | } | |
310 | ||
311 | while (ICSR1 & ICSR1_TBY) | |
312 | cpu_relax(); | |
313 | si->last_oscr = OSCR; | |
314 | ||
315 | /* | |
316 | * HACK: It looks like the TBY bit is dropped too soon. | |
317 | * Without this delay things break. | |
318 | */ | |
319 | udelay(120); | |
320 | ||
321 | if (si->newspeed) { | |
322 | pxa_irda_set_speed(si, si->newspeed); | |
323 | si->newspeed = 0; | |
324 | } else { | |
325 | ICCR0 = 0; | |
326 | pxa_irda_fir_dma_rx_start(si); | |
327 | ICCR0 = ICCR0_ITR | ICCR0_RXE; | |
328 | } | |
329 | netif_wake_queue(dev); | |
330 | } | |
331 | ||
332 | /* EIF(Error in FIFO/End in Frame) handler for FIR */ | |
333 | static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev) | |
334 | { | |
335 | unsigned int len, stat, data; | |
336 | ||
337 | /* Get the current data position. */ | |
338 | len = DTADR(si->rxdma) - si->dma_rx_buff_phy; | |
339 | ||
340 | do { | |
341 | /* Read Status, and then Data. */ | |
342 | stat = ICSR1; | |
343 | rmb(); | |
344 | data = ICDR; | |
345 | ||
346 | if (stat & (ICSR1_CRE | ICSR1_ROR)) { | |
347 | si->stats.rx_errors++; | |
348 | if (stat & ICSR1_CRE) { | |
349 | printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n"); | |
350 | si->stats.rx_crc_errors++; | |
351 | } | |
352 | if (stat & ICSR1_ROR) { | |
353 | printk(KERN_DEBUG "pxa_ir: fir receive overrun\n"); | |
354 | si->stats.rx_frame_errors++; | |
355 | } | |
356 | } else { | |
357 | si->dma_rx_buff[len++] = data; | |
358 | } | |
359 | /* If we hit the end of frame, there's no point in continuing. */ | |
360 | if (stat & ICSR1_EOF) | |
361 | break; | |
362 | } while (ICSR0 & ICSR0_EIF); | |
363 | ||
364 | if (stat & ICSR1_EOF) { | |
365 | /* end of frame. */ | |
366 | struct sk_buff *skb = alloc_skb(len+1,GFP_ATOMIC); | |
367 | if (!skb) { | |
368 | printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n"); | |
369 | si->stats.rx_dropped++; | |
370 | return; | |
371 | } | |
372 | ||
373 | /* Align IP header to 20 bytes */ | |
374 | skb_reserve(skb, 1); | |
375 | memcpy(skb->data, si->dma_rx_buff, len); | |
376 | skb_put(skb, len); | |
377 | ||
378 | /* Feed it to IrLAP */ | |
379 | skb->dev = dev; | |
380 | skb->mac.raw = skb->data; | |
381 | skb->protocol = htons(ETH_P_IRDA); | |
382 | netif_rx(skb); | |
383 | ||
384 | si->stats.rx_packets++; | |
385 | si->stats.rx_bytes += len; | |
386 | ||
387 | dev->last_rx = jiffies; | |
388 | } | |
389 | } | |
390 | ||
391 | /* FIR interrupt handler */ | |
392 | static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id, struct pt_regs *regs) | |
393 | { | |
394 | struct net_device *dev = dev_id; | |
395 | struct pxa_irda *si = netdev_priv(dev); | |
396 | int icsr0; | |
397 | ||
398 | /* stop RX DMA */ | |
399 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
400 | si->last_oscr = OSCR; | |
401 | icsr0 = ICSR0; | |
402 | ||
403 | if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) { | |
404 | if (icsr0 & ICSR0_FRE) { | |
405 | printk(KERN_DEBUG "pxa_ir: fir receive frame error\n"); | |
406 | si->stats.rx_frame_errors++; | |
407 | } else { | |
408 | printk(KERN_DEBUG "pxa_ir: fir receive abort\n"); | |
409 | si->stats.rx_errors++; | |
410 | } | |
411 | ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB); | |
412 | } | |
413 | ||
414 | if (icsr0 & ICSR0_EIF) { | |
415 | /* An error in FIFO occured, or there is a end of frame */ | |
416 | pxa_irda_fir_irq_eif(si, dev); | |
417 | } | |
418 | ||
419 | ICCR0 = 0; | |
420 | pxa_irda_fir_dma_rx_start(si); | |
421 | ICCR0 = ICCR0_ITR | ICCR0_RXE; | |
422 | ||
423 | return IRQ_HANDLED; | |
424 | } | |
425 | ||
426 | /* hard_xmit interface of irda device */ | |
427 | static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) | |
428 | { | |
429 | struct pxa_irda *si = netdev_priv(dev); | |
430 | int speed = irda_get_next_speed(skb); | |
431 | ||
432 | /* | |
433 | * Does this packet contain a request to change the interface | |
434 | * speed? If so, remember it until we complete the transmission | |
435 | * of this frame. | |
436 | */ | |
437 | if (speed != si->speed && speed != -1) | |
438 | si->newspeed = speed; | |
439 | ||
440 | /* | |
441 | * If this is an empty frame, we can bypass a lot. | |
442 | */ | |
443 | if (skb->len == 0) { | |
444 | if (si->newspeed) { | |
445 | si->newspeed = 0; | |
446 | pxa_irda_set_speed(si, speed); | |
447 | } | |
448 | dev_kfree_skb(skb); | |
449 | return 0; | |
450 | } | |
451 | ||
452 | netif_stop_queue(dev); | |
453 | ||
454 | if (!IS_FIR(si)) { | |
455 | si->tx_buff.data = si->tx_buff.head; | |
456 | si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize); | |
457 | ||
458 | /* Disable STUART interrupts and switch to transmit mode. */ | |
459 | STIER = 0; | |
460 | STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6; | |
461 | ||
462 | /* enable STUART and transmit interrupts */ | |
463 | STIER = IER_UUE | IER_TIE; | |
464 | } else { | |
465 | unsigned long mtt = irda_get_mtt(skb); | |
466 | ||
467 | si->dma_tx_buff_len = skb->len; | |
468 | memcpy(si->dma_tx_buff, skb->data, skb->len); | |
469 | ||
470 | if (mtt) | |
471 | while ((unsigned)(OSCR - si->last_oscr)/4 < mtt) | |
472 | cpu_relax(); | |
473 | ||
474 | /* stop RX DMA, disable FICP */ | |
475 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
476 | ICCR0 = 0; | |
477 | ||
478 | pxa_irda_fir_dma_tx_start(si); | |
479 | ICCR0 = ICCR0_ITR | ICCR0_TXE; | |
480 | } | |
481 | ||
482 | dev_kfree_skb(skb); | |
483 | dev->trans_start = jiffies; | |
484 | return 0; | |
485 | } | |
486 | ||
487 | static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd) | |
488 | { | |
489 | struct if_irda_req *rq = (struct if_irda_req *)ifreq; | |
490 | struct pxa_irda *si = netdev_priv(dev); | |
491 | int ret; | |
492 | ||
493 | switch (cmd) { | |
494 | case SIOCSBANDWIDTH: | |
495 | ret = -EPERM; | |
496 | if (capable(CAP_NET_ADMIN)) { | |
497 | /* | |
498 | * We are unable to set the speed if the | |
499 | * device is not running. | |
500 | */ | |
501 | if (netif_running(dev)) { | |
502 | ret = pxa_irda_set_speed(si, | |
503 | rq->ifr_baudrate); | |
504 | } else { | |
505 | printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n"); | |
506 | ret = 0; | |
507 | } | |
508 | } | |
509 | break; | |
510 | ||
511 | case SIOCSMEDIABUSY: | |
512 | ret = -EPERM; | |
513 | if (capable(CAP_NET_ADMIN)) { | |
514 | irda_device_set_media_busy(dev, TRUE); | |
515 | ret = 0; | |
516 | } | |
517 | break; | |
518 | ||
519 | case SIOCGRECEIVING: | |
520 | ret = 0; | |
521 | rq->ifr_receiving = IS_FIR(si) ? 0 | |
522 | : si->rx_buff.state != OUTSIDE_FRAME; | |
523 | break; | |
524 | ||
525 | default: | |
526 | ret = -EOPNOTSUPP; | |
527 | break; | |
528 | } | |
529 | ||
530 | return ret; | |
531 | } | |
532 | ||
533 | static struct net_device_stats *pxa_irda_stats(struct net_device *dev) | |
534 | { | |
535 | struct pxa_irda *si = netdev_priv(dev); | |
536 | return &si->stats; | |
537 | } | |
538 | ||
539 | static void pxa_irda_startup(struct pxa_irda *si) | |
540 | { | |
541 | /* Disable STUART interrupts */ | |
542 | STIER = 0; | |
543 | /* enable STUART interrupt to the processor */ | |
544 | STMCR = MCR_OUT2; | |
545 | /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */ | |
546 | STLCR = LCR_WLS0 | LCR_WLS1; | |
547 | /* enable FIFO, we use FIFO to improve performance */ | |
548 | STFCR = FCR_TRFIFOE | FCR_ITL_32; | |
549 | ||
550 | /* disable FICP */ | |
551 | ICCR0 = 0; | |
552 | /* configure FICP ICCR2 */ | |
553 | ICCR2 = ICCR2_TXP | ICCR2_TRIG_32; | |
554 | ||
555 | /* configure DMAC */ | |
556 | DRCMR17 = si->rxdma | DRCMR_MAPVLD; | |
557 | DRCMR18 = si->txdma | DRCMR_MAPVLD; | |
558 | ||
559 | /* force SIR reinitialization */ | |
560 | si->speed = 4000000; | |
561 | pxa_irda_set_speed(si, 9600); | |
562 | ||
563 | printk(KERN_DEBUG "pxa_ir: irda startup\n"); | |
564 | } | |
565 | ||
566 | static void pxa_irda_shutdown(struct pxa_irda *si) | |
567 | { | |
568 | unsigned long flags; | |
569 | ||
570 | local_irq_save(flags); | |
571 | ||
572 | /* disable STUART and interrupt */ | |
573 | STIER = 0; | |
574 | /* disable STUART SIR mode */ | |
575 | STISR = 0; | |
576 | /* disable the STUART clock */ | |
577 | pxa_set_cken(CKEN5_STUART, 0); | |
578 | ||
579 | /* disable DMA */ | |
580 | DCSR(si->txdma) &= ~DCSR_RUN; | |
581 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
582 | /* disable FICP */ | |
583 | ICCR0 = 0; | |
584 | /* disable the FICP clock */ | |
585 | pxa_set_cken(CKEN13_FICP, 0); | |
586 | ||
587 | DRCMR17 = 0; | |
588 | DRCMR18 = 0; | |
589 | ||
590 | local_irq_restore(flags); | |
591 | ||
592 | /* power off board transceiver */ | |
593 | si->pdata->transceiver_mode(si->dev, IR_OFF); | |
594 | ||
595 | printk(KERN_DEBUG "pxa_ir: irda shutdown\n"); | |
596 | } | |
597 | ||
598 | static int pxa_irda_start(struct net_device *dev) | |
599 | { | |
600 | struct pxa_irda *si = netdev_priv(dev); | |
601 | int err; | |
602 | ||
603 | si->speed = 9600; | |
604 | ||
605 | err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev); | |
606 | if (err) | |
607 | goto err_irq1; | |
608 | ||
609 | err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev); | |
610 | if (err) | |
611 | goto err_irq2; | |
612 | ||
613 | /* | |
614 | * The interrupt must remain disabled for now. | |
615 | */ | |
616 | disable_irq(IRQ_STUART); | |
617 | disable_irq(IRQ_ICP); | |
618 | ||
619 | err = -EBUSY; | |
620 | si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev); | |
621 | if (si->rxdma < 0) | |
622 | goto err_rx_dma; | |
623 | ||
624 | si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev); | |
625 | if (si->txdma < 0) | |
626 | goto err_tx_dma; | |
627 | ||
628 | err = -ENOMEM; | |
629 | si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, | |
630 | &si->dma_rx_buff_phy, GFP_KERNEL ); | |
631 | if (!si->dma_rx_buff) | |
632 | goto err_dma_rx_buff; | |
633 | ||
634 | si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, | |
635 | &si->dma_tx_buff_phy, GFP_KERNEL ); | |
636 | if (!si->dma_tx_buff) | |
637 | goto err_dma_tx_buff; | |
638 | ||
639 | /* Setup the serial port for the initial speed. */ | |
640 | pxa_irda_startup(si); | |
641 | ||
642 | /* | |
643 | * Open a new IrLAP layer instance. | |
644 | */ | |
645 | si->irlap = irlap_open(dev, &si->qos, "pxa"); | |
646 | err = -ENOMEM; | |
647 | if (!si->irlap) | |
648 | goto err_irlap; | |
649 | ||
650 | /* | |
651 | * Now enable the interrupt and start the queue | |
652 | */ | |
653 | enable_irq(IRQ_STUART); | |
654 | enable_irq(IRQ_ICP); | |
655 | netif_start_queue(dev); | |
656 | ||
657 | printk(KERN_DEBUG "pxa_ir: irda driver opened\n"); | |
658 | ||
659 | return 0; | |
660 | ||
661 | err_irlap: | |
662 | pxa_irda_shutdown(si); | |
663 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy); | |
664 | err_dma_tx_buff: | |
665 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy); | |
666 | err_dma_rx_buff: | |
667 | pxa_free_dma(si->txdma); | |
668 | err_tx_dma: | |
669 | pxa_free_dma(si->rxdma); | |
670 | err_rx_dma: | |
671 | free_irq(IRQ_ICP, dev); | |
672 | err_irq2: | |
673 | free_irq(IRQ_STUART, dev); | |
674 | err_irq1: | |
675 | ||
676 | return err; | |
677 | } | |
678 | ||
679 | static int pxa_irda_stop(struct net_device *dev) | |
680 | { | |
681 | struct pxa_irda *si = netdev_priv(dev); | |
682 | ||
683 | netif_stop_queue(dev); | |
684 | ||
685 | pxa_irda_shutdown(si); | |
686 | ||
687 | /* Stop IrLAP */ | |
688 | if (si->irlap) { | |
689 | irlap_close(si->irlap); | |
690 | si->irlap = NULL; | |
691 | } | |
692 | ||
693 | free_irq(IRQ_STUART, dev); | |
694 | free_irq(IRQ_ICP, dev); | |
695 | ||
696 | pxa_free_dma(si->rxdma); | |
697 | pxa_free_dma(si->txdma); | |
698 | ||
699 | if (si->dma_rx_buff) | |
700 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy); | |
701 | if (si->dma_tx_buff) | |
702 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy); | |
703 | ||
704 | printk(KERN_DEBUG "pxa_ir: irda driver closed\n"); | |
705 | return 0; | |
706 | } | |
707 | ||
708 | static int pxa_irda_suspend(struct device *_dev, pm_message_t state, u32 level) | |
709 | { | |
710 | struct net_device *dev = dev_get_drvdata(_dev); | |
711 | struct pxa_irda *si; | |
712 | ||
713 | if (!dev || level != SUSPEND_DISABLE) | |
714 | return 0; | |
715 | ||
716 | if (netif_running(dev)) { | |
717 | si = netdev_priv(dev); | |
718 | netif_device_detach(dev); | |
719 | pxa_irda_shutdown(si); | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static int pxa_irda_resume(struct device *_dev, u32 level) | |
726 | { | |
727 | struct net_device *dev = dev_get_drvdata(_dev); | |
728 | struct pxa_irda *si; | |
729 | ||
730 | if (!dev || level != RESUME_ENABLE) | |
731 | return 0; | |
732 | ||
733 | if (netif_running(dev)) { | |
734 | si = netdev_priv(dev); | |
735 | pxa_irda_startup(si); | |
736 | netif_device_attach(dev); | |
737 | netif_wake_queue(dev); | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | ||
744 | static int pxa_irda_init_iobuf(iobuff_t *io, int size) | |
745 | { | |
746 | io->head = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
747 | if (io->head != NULL) { | |
748 | io->truesize = size; | |
749 | io->in_frame = FALSE; | |
750 | io->state = OUTSIDE_FRAME; | |
751 | io->data = io->head; | |
752 | } | |
753 | return io->head ? 0 : -ENOMEM; | |
754 | } | |
755 | ||
756 | static int pxa_irda_probe(struct device *_dev) | |
757 | { | |
758 | struct platform_device *pdev = to_platform_device(_dev); | |
759 | struct net_device *dev; | |
760 | struct pxa_irda *si; | |
761 | unsigned int baudrate_mask; | |
762 | int err; | |
763 | ||
764 | if (!pdev->dev.platform_data) | |
765 | return -ENODEV; | |
766 | ||
767 | err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY; | |
768 | if (err) | |
769 | goto err_mem_1; | |
770 | ||
771 | err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY; | |
772 | if (err) | |
773 | goto err_mem_2; | |
774 | ||
775 | dev = alloc_irdadev(sizeof(struct pxa_irda)); | |
776 | if (!dev) | |
777 | goto err_mem_3; | |
778 | ||
779 | si = netdev_priv(dev); | |
780 | si->dev = &pdev->dev; | |
781 | si->pdata = pdev->dev.platform_data; | |
782 | ||
783 | /* | |
784 | * Initialise the SIR buffers | |
785 | */ | |
786 | err = pxa_irda_init_iobuf(&si->rx_buff, 14384); | |
787 | if (err) | |
788 | goto err_mem_4; | |
789 | err = pxa_irda_init_iobuf(&si->tx_buff, 4000); | |
790 | if (err) | |
791 | goto err_mem_5; | |
792 | ||
793 | dev->hard_start_xmit = pxa_irda_hard_xmit; | |
794 | dev->open = pxa_irda_start; | |
795 | dev->stop = pxa_irda_stop; | |
796 | dev->do_ioctl = pxa_irda_ioctl; | |
797 | dev->get_stats = pxa_irda_stats; | |
798 | ||
799 | irda_init_max_qos_capabilies(&si->qos); | |
800 | ||
801 | baudrate_mask = 0; | |
802 | if (si->pdata->transceiver_cap & IR_SIRMODE) | |
803 | baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; | |
804 | if (si->pdata->transceiver_cap & IR_FIRMODE) | |
805 | baudrate_mask |= IR_4000000 << 8; | |
806 | ||
807 | si->qos.baud_rate.bits &= baudrate_mask; | |
808 | si->qos.min_turn_time.bits = 7; /* 1ms or more */ | |
809 | ||
810 | irda_qos_bits_to_value(&si->qos); | |
811 | ||
812 | err = register_netdev(dev); | |
813 | ||
814 | if (err == 0) | |
815 | dev_set_drvdata(&pdev->dev, dev); | |
816 | ||
817 | if (err) { | |
818 | kfree(si->tx_buff.head); | |
819 | err_mem_5: | |
820 | kfree(si->rx_buff.head); | |
821 | err_mem_4: | |
822 | free_netdev(dev); | |
823 | err_mem_3: | |
824 | release_mem_region(__PREG(FICP), 0x1c); | |
825 | err_mem_2: | |
826 | release_mem_region(__PREG(STUART), 0x24); | |
827 | } | |
828 | err_mem_1: | |
829 | return err; | |
830 | } | |
831 | ||
832 | static int pxa_irda_remove(struct device *_dev) | |
833 | { | |
834 | struct net_device *dev = dev_get_drvdata(_dev); | |
835 | ||
836 | if (dev) { | |
837 | struct pxa_irda *si = netdev_priv(dev); | |
838 | unregister_netdev(dev); | |
839 | kfree(si->tx_buff.head); | |
840 | kfree(si->rx_buff.head); | |
841 | free_netdev(dev); | |
842 | } | |
843 | ||
844 | release_mem_region(__PREG(STUART), 0x24); | |
845 | release_mem_region(__PREG(FICP), 0x1c); | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | static struct device_driver pxa_ir_driver = { | |
851 | .name = "pxa2xx-ir", | |
852 | .bus = &platform_bus_type, | |
853 | .probe = pxa_irda_probe, | |
854 | .remove = pxa_irda_remove, | |
855 | .suspend = pxa_irda_suspend, | |
856 | .resume = pxa_irda_resume, | |
857 | }; | |
858 | ||
859 | static int __init pxa_irda_init(void) | |
860 | { | |
861 | return driver_register(&pxa_ir_driver); | |
862 | } | |
863 | ||
864 | static void __exit pxa_irda_exit(void) | |
865 | { | |
866 | driver_unregister(&pxa_ir_driver); | |
867 | } | |
868 | ||
869 | module_init(pxa_irda_init); | |
870 | module_exit(pxa_irda_exit); | |
871 | ||
872 | MODULE_LICENSE("GPL"); |