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Commit | Line | Data |
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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 | */ | |
6f475c01 NP |
15 | #include <linux/module.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/rtnetlink.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/dma-mapping.h> | |
d052d1be | 24 | #include <linux/platform_device.h> |
6f475c01 NP |
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 | ||
68 | struct 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 | ||
96 | inline 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 | ||
105 | inline 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 | */ | |
117 | static 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. */ | |
7d12e780 | 202 | static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id) |
6f475c01 NP |
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 */ | |
7d12e780 | 284 | static void pxa_irda_fir_dma_rx_irq(int channel, void *data) |
6f475c01 NP |
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 */ | |
7d12e780 | 294 | static void pxa_irda_fir_dma_tx_irq(int channel, void *data) |
6f475c01 NP |
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 { | |
9a4d93d4 GL |
324 | int i = 64; |
325 | ||
6f475c01 NP |
326 | ICCR0 = 0; |
327 | pxa_irda_fir_dma_rx_start(si); | |
9a4d93d4 GL |
328 | while ((ICSR1 & ICSR1_RNE) && i--) |
329 | (void)ICDR; | |
6f475c01 | 330 | ICCR0 = ICCR0_ITR | ICCR0_RXE; |
9a4d93d4 GL |
331 | |
332 | if (i < 0) | |
333 | printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); | |
6f475c01 NP |
334 | } |
335 | netif_wake_queue(dev); | |
336 | } | |
337 | ||
338 | /* EIF(Error in FIFO/End in Frame) handler for FIR */ | |
9a4d93d4 | 339 | static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0) |
6f475c01 NP |
340 | { |
341 | unsigned int len, stat, data; | |
342 | ||
343 | /* Get the current data position. */ | |
344 | len = DTADR(si->rxdma) - si->dma_rx_buff_phy; | |
345 | ||
346 | do { | |
347 | /* Read Status, and then Data. */ | |
348 | stat = ICSR1; | |
349 | rmb(); | |
350 | data = ICDR; | |
351 | ||
352 | if (stat & (ICSR1_CRE | ICSR1_ROR)) { | |
353 | si->stats.rx_errors++; | |
354 | if (stat & ICSR1_CRE) { | |
355 | printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n"); | |
356 | si->stats.rx_crc_errors++; | |
357 | } | |
358 | if (stat & ICSR1_ROR) { | |
359 | printk(KERN_DEBUG "pxa_ir: fir receive overrun\n"); | |
9a4d93d4 | 360 | si->stats.rx_over_errors++; |
6f475c01 NP |
361 | } |
362 | } else { | |
363 | si->dma_rx_buff[len++] = data; | |
364 | } | |
365 | /* If we hit the end of frame, there's no point in continuing. */ | |
366 | if (stat & ICSR1_EOF) | |
367 | break; | |
368 | } while (ICSR0 & ICSR0_EIF); | |
369 | ||
370 | if (stat & ICSR1_EOF) { | |
371 | /* end of frame. */ | |
9a4d93d4 GL |
372 | struct sk_buff *skb; |
373 | ||
374 | if (icsr0 & ICSR0_FRE) { | |
375 | printk(KERN_ERR "pxa_ir: dropping erroneous frame\n"); | |
376 | si->stats.rx_dropped++; | |
377 | return; | |
378 | } | |
379 | ||
380 | skb = alloc_skb(len+1,GFP_ATOMIC); | |
6f475c01 NP |
381 | if (!skb) { |
382 | printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n"); | |
383 | si->stats.rx_dropped++; | |
384 | return; | |
385 | } | |
386 | ||
387 | /* Align IP header to 20 bytes */ | |
388 | skb_reserve(skb, 1); | |
389 | memcpy(skb->data, si->dma_rx_buff, len); | |
390 | skb_put(skb, len); | |
391 | ||
392 | /* Feed it to IrLAP */ | |
393 | skb->dev = dev; | |
459a98ed | 394 | skb_reset_mac_header(skb); |
6f475c01 NP |
395 | skb->protocol = htons(ETH_P_IRDA); |
396 | netif_rx(skb); | |
397 | ||
398 | si->stats.rx_packets++; | |
399 | si->stats.rx_bytes += len; | |
400 | ||
401 | dev->last_rx = jiffies; | |
402 | } | |
403 | } | |
404 | ||
405 | /* FIR interrupt handler */ | |
7d12e780 | 406 | static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id) |
6f475c01 NP |
407 | { |
408 | struct net_device *dev = dev_id; | |
409 | struct pxa_irda *si = netdev_priv(dev); | |
9a4d93d4 | 410 | int icsr0, i = 64; |
6f475c01 NP |
411 | |
412 | /* stop RX DMA */ | |
413 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
414 | si->last_oscr = OSCR; | |
415 | icsr0 = ICSR0; | |
416 | ||
417 | if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) { | |
418 | if (icsr0 & ICSR0_FRE) { | |
419 | printk(KERN_DEBUG "pxa_ir: fir receive frame error\n"); | |
420 | si->stats.rx_frame_errors++; | |
421 | } else { | |
422 | printk(KERN_DEBUG "pxa_ir: fir receive abort\n"); | |
423 | si->stats.rx_errors++; | |
424 | } | |
425 | ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB); | |
426 | } | |
427 | ||
428 | if (icsr0 & ICSR0_EIF) { | |
429 | /* An error in FIFO occured, or there is a end of frame */ | |
9a4d93d4 | 430 | pxa_irda_fir_irq_eif(si, dev, icsr0); |
6f475c01 NP |
431 | } |
432 | ||
433 | ICCR0 = 0; | |
434 | pxa_irda_fir_dma_rx_start(si); | |
9a4d93d4 GL |
435 | while ((ICSR1 & ICSR1_RNE) && i--) |
436 | (void)ICDR; | |
6f475c01 NP |
437 | ICCR0 = ICCR0_ITR | ICCR0_RXE; |
438 | ||
9a4d93d4 GL |
439 | if (i < 0) |
440 | printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); | |
441 | ||
6f475c01 NP |
442 | return IRQ_HANDLED; |
443 | } | |
444 | ||
445 | /* hard_xmit interface of irda device */ | |
446 | static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) | |
447 | { | |
448 | struct pxa_irda *si = netdev_priv(dev); | |
449 | int speed = irda_get_next_speed(skb); | |
450 | ||
451 | /* | |
452 | * Does this packet contain a request to change the interface | |
453 | * speed? If so, remember it until we complete the transmission | |
454 | * of this frame. | |
455 | */ | |
456 | if (speed != si->speed && speed != -1) | |
457 | si->newspeed = speed; | |
458 | ||
459 | /* | |
460 | * If this is an empty frame, we can bypass a lot. | |
461 | */ | |
462 | if (skb->len == 0) { | |
463 | if (si->newspeed) { | |
464 | si->newspeed = 0; | |
465 | pxa_irda_set_speed(si, speed); | |
466 | } | |
467 | dev_kfree_skb(skb); | |
468 | return 0; | |
469 | } | |
470 | ||
471 | netif_stop_queue(dev); | |
472 | ||
473 | if (!IS_FIR(si)) { | |
474 | si->tx_buff.data = si->tx_buff.head; | |
475 | si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize); | |
476 | ||
477 | /* Disable STUART interrupts and switch to transmit mode. */ | |
478 | STIER = 0; | |
479 | STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6; | |
480 | ||
481 | /* enable STUART and transmit interrupts */ | |
482 | STIER = IER_UUE | IER_TIE; | |
483 | } else { | |
484 | unsigned long mtt = irda_get_mtt(skb); | |
485 | ||
486 | si->dma_tx_buff_len = skb->len; | |
d626f62b | 487 | skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len); |
6f475c01 NP |
488 | |
489 | if (mtt) | |
490 | while ((unsigned)(OSCR - si->last_oscr)/4 < mtt) | |
491 | cpu_relax(); | |
492 | ||
493 | /* stop RX DMA, disable FICP */ | |
494 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
495 | ICCR0 = 0; | |
496 | ||
497 | pxa_irda_fir_dma_tx_start(si); | |
498 | ICCR0 = ICCR0_ITR | ICCR0_TXE; | |
499 | } | |
500 | ||
501 | dev_kfree_skb(skb); | |
502 | dev->trans_start = jiffies; | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd) | |
507 | { | |
508 | struct if_irda_req *rq = (struct if_irda_req *)ifreq; | |
509 | struct pxa_irda *si = netdev_priv(dev); | |
510 | int ret; | |
511 | ||
512 | switch (cmd) { | |
513 | case SIOCSBANDWIDTH: | |
514 | ret = -EPERM; | |
515 | if (capable(CAP_NET_ADMIN)) { | |
516 | /* | |
517 | * We are unable to set the speed if the | |
518 | * device is not running. | |
519 | */ | |
520 | if (netif_running(dev)) { | |
521 | ret = pxa_irda_set_speed(si, | |
522 | rq->ifr_baudrate); | |
523 | } else { | |
524 | printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n"); | |
525 | ret = 0; | |
526 | } | |
527 | } | |
528 | break; | |
529 | ||
530 | case SIOCSMEDIABUSY: | |
531 | ret = -EPERM; | |
532 | if (capable(CAP_NET_ADMIN)) { | |
533 | irda_device_set_media_busy(dev, TRUE); | |
534 | ret = 0; | |
535 | } | |
536 | break; | |
537 | ||
538 | case SIOCGRECEIVING: | |
539 | ret = 0; | |
540 | rq->ifr_receiving = IS_FIR(si) ? 0 | |
541 | : si->rx_buff.state != OUTSIDE_FRAME; | |
542 | break; | |
543 | ||
544 | default: | |
545 | ret = -EOPNOTSUPP; | |
546 | break; | |
547 | } | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | static struct net_device_stats *pxa_irda_stats(struct net_device *dev) | |
553 | { | |
554 | struct pxa_irda *si = netdev_priv(dev); | |
555 | return &si->stats; | |
556 | } | |
557 | ||
558 | static void pxa_irda_startup(struct pxa_irda *si) | |
559 | { | |
560 | /* Disable STUART interrupts */ | |
561 | STIER = 0; | |
562 | /* enable STUART interrupt to the processor */ | |
563 | STMCR = MCR_OUT2; | |
564 | /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */ | |
565 | STLCR = LCR_WLS0 | LCR_WLS1; | |
566 | /* enable FIFO, we use FIFO to improve performance */ | |
567 | STFCR = FCR_TRFIFOE | FCR_ITL_32; | |
568 | ||
569 | /* disable FICP */ | |
570 | ICCR0 = 0; | |
571 | /* configure FICP ICCR2 */ | |
572 | ICCR2 = ICCR2_TXP | ICCR2_TRIG_32; | |
573 | ||
574 | /* configure DMAC */ | |
575 | DRCMR17 = si->rxdma | DRCMR_MAPVLD; | |
576 | DRCMR18 = si->txdma | DRCMR_MAPVLD; | |
577 | ||
578 | /* force SIR reinitialization */ | |
579 | si->speed = 4000000; | |
580 | pxa_irda_set_speed(si, 9600); | |
581 | ||
582 | printk(KERN_DEBUG "pxa_ir: irda startup\n"); | |
583 | } | |
584 | ||
585 | static void pxa_irda_shutdown(struct pxa_irda *si) | |
586 | { | |
587 | unsigned long flags; | |
588 | ||
589 | local_irq_save(flags); | |
590 | ||
591 | /* disable STUART and interrupt */ | |
592 | STIER = 0; | |
593 | /* disable STUART SIR mode */ | |
594 | STISR = 0; | |
595 | /* disable the STUART clock */ | |
596 | pxa_set_cken(CKEN5_STUART, 0); | |
597 | ||
598 | /* disable DMA */ | |
599 | DCSR(si->txdma) &= ~DCSR_RUN; | |
600 | DCSR(si->rxdma) &= ~DCSR_RUN; | |
601 | /* disable FICP */ | |
602 | ICCR0 = 0; | |
603 | /* disable the FICP clock */ | |
604 | pxa_set_cken(CKEN13_FICP, 0); | |
605 | ||
606 | DRCMR17 = 0; | |
607 | DRCMR18 = 0; | |
608 | ||
609 | local_irq_restore(flags); | |
610 | ||
611 | /* power off board transceiver */ | |
612 | si->pdata->transceiver_mode(si->dev, IR_OFF); | |
613 | ||
614 | printk(KERN_DEBUG "pxa_ir: irda shutdown\n"); | |
615 | } | |
616 | ||
617 | static int pxa_irda_start(struct net_device *dev) | |
618 | { | |
619 | struct pxa_irda *si = netdev_priv(dev); | |
620 | int err; | |
621 | ||
622 | si->speed = 9600; | |
623 | ||
624 | err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev); | |
625 | if (err) | |
626 | goto err_irq1; | |
627 | ||
628 | err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev); | |
629 | if (err) | |
630 | goto err_irq2; | |
631 | ||
632 | /* | |
633 | * The interrupt must remain disabled for now. | |
634 | */ | |
635 | disable_irq(IRQ_STUART); | |
636 | disable_irq(IRQ_ICP); | |
637 | ||
638 | err = -EBUSY; | |
639 | si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev); | |
640 | if (si->rxdma < 0) | |
641 | goto err_rx_dma; | |
642 | ||
643 | si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev); | |
644 | if (si->txdma < 0) | |
645 | goto err_tx_dma; | |
646 | ||
647 | err = -ENOMEM; | |
648 | si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, | |
649 | &si->dma_rx_buff_phy, GFP_KERNEL ); | |
650 | if (!si->dma_rx_buff) | |
651 | goto err_dma_rx_buff; | |
652 | ||
653 | si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, | |
654 | &si->dma_tx_buff_phy, GFP_KERNEL ); | |
655 | if (!si->dma_tx_buff) | |
656 | goto err_dma_tx_buff; | |
657 | ||
658 | /* Setup the serial port for the initial speed. */ | |
659 | pxa_irda_startup(si); | |
660 | ||
661 | /* | |
662 | * Open a new IrLAP layer instance. | |
663 | */ | |
664 | si->irlap = irlap_open(dev, &si->qos, "pxa"); | |
665 | err = -ENOMEM; | |
666 | if (!si->irlap) | |
667 | goto err_irlap; | |
668 | ||
669 | /* | |
670 | * Now enable the interrupt and start the queue | |
671 | */ | |
672 | enable_irq(IRQ_STUART); | |
673 | enable_irq(IRQ_ICP); | |
674 | netif_start_queue(dev); | |
675 | ||
676 | printk(KERN_DEBUG "pxa_ir: irda driver opened\n"); | |
677 | ||
678 | return 0; | |
679 | ||
680 | err_irlap: | |
681 | pxa_irda_shutdown(si); | |
682 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy); | |
683 | err_dma_tx_buff: | |
684 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy); | |
685 | err_dma_rx_buff: | |
686 | pxa_free_dma(si->txdma); | |
687 | err_tx_dma: | |
688 | pxa_free_dma(si->rxdma); | |
689 | err_rx_dma: | |
690 | free_irq(IRQ_ICP, dev); | |
691 | err_irq2: | |
692 | free_irq(IRQ_STUART, dev); | |
693 | err_irq1: | |
694 | ||
695 | return err; | |
696 | } | |
697 | ||
698 | static int pxa_irda_stop(struct net_device *dev) | |
699 | { | |
700 | struct pxa_irda *si = netdev_priv(dev); | |
701 | ||
702 | netif_stop_queue(dev); | |
703 | ||
704 | pxa_irda_shutdown(si); | |
705 | ||
706 | /* Stop IrLAP */ | |
707 | if (si->irlap) { | |
708 | irlap_close(si->irlap); | |
709 | si->irlap = NULL; | |
710 | } | |
711 | ||
712 | free_irq(IRQ_STUART, dev); | |
713 | free_irq(IRQ_ICP, dev); | |
714 | ||
715 | pxa_free_dma(si->rxdma); | |
716 | pxa_free_dma(si->txdma); | |
717 | ||
718 | if (si->dma_rx_buff) | |
719 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy); | |
720 | if (si->dma_tx_buff) | |
721 | dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy); | |
722 | ||
723 | printk(KERN_DEBUG "pxa_ir: irda driver closed\n"); | |
724 | return 0; | |
725 | } | |
726 | ||
b259e7d2 | 727 | static int pxa_irda_suspend(struct platform_device *_dev, pm_message_t state) |
6f475c01 | 728 | { |
b259e7d2 | 729 | struct net_device *dev = platform_get_drvdata(_dev); |
6f475c01 NP |
730 | struct pxa_irda *si; |
731 | ||
91e1a512 | 732 | if (dev && netif_running(dev)) { |
6f475c01 NP |
733 | si = netdev_priv(dev); |
734 | netif_device_detach(dev); | |
735 | pxa_irda_shutdown(si); | |
736 | } | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
b259e7d2 | 741 | static int pxa_irda_resume(struct platform_device *_dev) |
6f475c01 | 742 | { |
b259e7d2 | 743 | struct net_device *dev = platform_get_drvdata(_dev); |
6f475c01 NP |
744 | struct pxa_irda *si; |
745 | ||
91e1a512 | 746 | if (dev && netif_running(dev)) { |
6f475c01 NP |
747 | si = netdev_priv(dev); |
748 | pxa_irda_startup(si); | |
749 | netif_device_attach(dev); | |
750 | netif_wake_queue(dev); | |
751 | } | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | ||
757 | static int pxa_irda_init_iobuf(iobuff_t *io, int size) | |
758 | { | |
759 | io->head = kmalloc(size, GFP_KERNEL | GFP_DMA); | |
760 | if (io->head != NULL) { | |
761 | io->truesize = size; | |
762 | io->in_frame = FALSE; | |
763 | io->state = OUTSIDE_FRAME; | |
764 | io->data = io->head; | |
765 | } | |
766 | return io->head ? 0 : -ENOMEM; | |
767 | } | |
768 | ||
b259e7d2 | 769 | static int pxa_irda_probe(struct platform_device *pdev) |
6f475c01 | 770 | { |
6f475c01 NP |
771 | struct net_device *dev; |
772 | struct pxa_irda *si; | |
773 | unsigned int baudrate_mask; | |
774 | int err; | |
775 | ||
776 | if (!pdev->dev.platform_data) | |
777 | return -ENODEV; | |
778 | ||
779 | err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY; | |
780 | if (err) | |
781 | goto err_mem_1; | |
782 | ||
783 | err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY; | |
784 | if (err) | |
785 | goto err_mem_2; | |
786 | ||
787 | dev = alloc_irdadev(sizeof(struct pxa_irda)); | |
788 | if (!dev) | |
789 | goto err_mem_3; | |
790 | ||
791 | si = netdev_priv(dev); | |
792 | si->dev = &pdev->dev; | |
793 | si->pdata = pdev->dev.platform_data; | |
794 | ||
795 | /* | |
796 | * Initialise the SIR buffers | |
797 | */ | |
798 | err = pxa_irda_init_iobuf(&si->rx_buff, 14384); | |
799 | if (err) | |
800 | goto err_mem_4; | |
801 | err = pxa_irda_init_iobuf(&si->tx_buff, 4000); | |
802 | if (err) | |
803 | goto err_mem_5; | |
804 | ||
805 | dev->hard_start_xmit = pxa_irda_hard_xmit; | |
806 | dev->open = pxa_irda_start; | |
807 | dev->stop = pxa_irda_stop; | |
808 | dev->do_ioctl = pxa_irda_ioctl; | |
809 | dev->get_stats = pxa_irda_stats; | |
810 | ||
811 | irda_init_max_qos_capabilies(&si->qos); | |
812 | ||
813 | baudrate_mask = 0; | |
814 | if (si->pdata->transceiver_cap & IR_SIRMODE) | |
815 | baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; | |
816 | if (si->pdata->transceiver_cap & IR_FIRMODE) | |
817 | baudrate_mask |= IR_4000000 << 8; | |
818 | ||
819 | si->qos.baud_rate.bits &= baudrate_mask; | |
820 | si->qos.min_turn_time.bits = 7; /* 1ms or more */ | |
821 | ||
822 | irda_qos_bits_to_value(&si->qos); | |
823 | ||
824 | err = register_netdev(dev); | |
825 | ||
826 | if (err == 0) | |
827 | dev_set_drvdata(&pdev->dev, dev); | |
828 | ||
829 | if (err) { | |
830 | kfree(si->tx_buff.head); | |
831 | err_mem_5: | |
832 | kfree(si->rx_buff.head); | |
833 | err_mem_4: | |
834 | free_netdev(dev); | |
835 | err_mem_3: | |
836 | release_mem_region(__PREG(FICP), 0x1c); | |
837 | err_mem_2: | |
838 | release_mem_region(__PREG(STUART), 0x24); | |
839 | } | |
840 | err_mem_1: | |
841 | return err; | |
842 | } | |
843 | ||
b259e7d2 | 844 | static int pxa_irda_remove(struct platform_device *_dev) |
6f475c01 | 845 | { |
b259e7d2 | 846 | struct net_device *dev = platform_get_drvdata(_dev); |
6f475c01 NP |
847 | |
848 | if (dev) { | |
849 | struct pxa_irda *si = netdev_priv(dev); | |
850 | unregister_netdev(dev); | |
851 | kfree(si->tx_buff.head); | |
852 | kfree(si->rx_buff.head); | |
853 | free_netdev(dev); | |
854 | } | |
855 | ||
856 | release_mem_region(__PREG(STUART), 0x24); | |
857 | release_mem_region(__PREG(FICP), 0x1c); | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
b259e7d2 PS |
862 | static struct platform_driver pxa_ir_driver = { |
863 | .driver = { | |
864 | .name = "pxa2xx-ir", | |
865 | }, | |
6f475c01 NP |
866 | .probe = pxa_irda_probe, |
867 | .remove = pxa_irda_remove, | |
868 | .suspend = pxa_irda_suspend, | |
869 | .resume = pxa_irda_resume, | |
870 | }; | |
871 | ||
872 | static int __init pxa_irda_init(void) | |
873 | { | |
b259e7d2 | 874 | return platform_driver_register(&pxa_ir_driver); |
6f475c01 NP |
875 | } |
876 | ||
877 | static void __exit pxa_irda_exit(void) | |
878 | { | |
b259e7d2 | 879 | platform_driver_unregister(&pxa_ir_driver); |
6f475c01 NP |
880 | } |
881 | ||
882 | module_init(pxa_irda_init); | |
883 | module_exit(pxa_irda_exit); | |
884 | ||
885 | MODULE_LICENSE("GPL"); |