1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2008 Christian Lamparter <chunkeey@web.de>
4  * Copyright 2008       Johannes Berg <johannes@sipsolutions.net>
5  *
6  * This driver is a port from stlc45xx:
7  *	Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
8  */
9 
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/interrupt.h>
13 #include <linux/firmware.h>
14 #include <linux/delay.h>
15 #include <linux/irq.h>
16 #include <linux/spi/spi.h>
17 #include <linux/etherdevice.h>
18 #include <linux/gpio.h>
19 #include <linux/slab.h>
20 
21 #include "p54spi.h"
22 #include "p54.h"
23 
24 #include "lmac.h"
25 
26 #ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
27 #include "p54spi_eeprom.h"
28 #endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
29 
30 MODULE_FIRMWARE("3826.arm");
31 
32 /* gpios should be handled in board files and provided via platform data,
33  * but because it's currently impossible for p54spi to have a header file
34  * in include/linux, let's use module paramaters for now
35  */
36 
37 static int p54spi_gpio_power = 97;
38 module_param(p54spi_gpio_power, int, 0444);
39 MODULE_PARM_DESC(p54spi_gpio_power, "gpio number for power line");
40 
41 static int p54spi_gpio_irq = 87;
42 module_param(p54spi_gpio_irq, int, 0444);
43 MODULE_PARM_DESC(p54spi_gpio_irq, "gpio number for irq line");
44 
45 static void p54spi_spi_read(struct p54s_priv *priv, u8 address,
46 			      void *buf, size_t len)
47 {
48 	struct spi_transfer t[2];
49 	struct spi_message m;
50 	__le16 addr;
51 
52 	/* We first push the address */
53 	addr = cpu_to_le16(address << 8 | SPI_ADRS_READ_BIT_15);
54 
55 	spi_message_init(&m);
56 	memset(t, 0, sizeof(t));
57 
58 	t[0].tx_buf = &addr;
59 	t[0].len = sizeof(addr);
60 	spi_message_add_tail(&t[0], &m);
61 
62 	t[1].rx_buf = buf;
63 	t[1].len = len;
64 	spi_message_add_tail(&t[1], &m);
65 
66 	spi_sync(priv->spi, &m);
67 }
68 
69 
70 static void p54spi_spi_write(struct p54s_priv *priv, u8 address,
71 			     const void *buf, size_t len)
72 {
73 	struct spi_transfer t[3];
74 	struct spi_message m;
75 	__le16 addr;
76 
77 	/* We first push the address */
78 	addr = cpu_to_le16(address << 8);
79 
80 	spi_message_init(&m);
81 	memset(t, 0, sizeof(t));
82 
83 	t[0].tx_buf = &addr;
84 	t[0].len = sizeof(addr);
85 	spi_message_add_tail(&t[0], &m);
86 
87 	t[1].tx_buf = buf;
88 	t[1].len = len & ~1;
89 	spi_message_add_tail(&t[1], &m);
90 
91 	if (len % 2) {
92 		__le16 last_word;
93 		last_word = cpu_to_le16(((u8 *)buf)[len - 1]);
94 
95 		t[2].tx_buf = &last_word;
96 		t[2].len = sizeof(last_word);
97 		spi_message_add_tail(&t[2], &m);
98 	}
99 
100 	spi_sync(priv->spi, &m);
101 }
102 
103 static u32 p54spi_read32(struct p54s_priv *priv, u8 addr)
104 {
105 	__le32 val;
106 
107 	p54spi_spi_read(priv, addr, &val, sizeof(val));
108 
109 	return le32_to_cpu(val);
110 }
111 
112 static inline void p54spi_write16(struct p54s_priv *priv, u8 addr, __le16 val)
113 {
114 	p54spi_spi_write(priv, addr, &val, sizeof(val));
115 }
116 
117 static inline void p54spi_write32(struct p54s_priv *priv, u8 addr, __le32 val)
118 {
119 	p54spi_spi_write(priv, addr, &val, sizeof(val));
120 }
121 
122 static int p54spi_wait_bit(struct p54s_priv *priv, u16 reg, u32 bits)
123 {
124 	int i;
125 
126 	for (i = 0; i < 2000; i++) {
127 		u32 buffer = p54spi_read32(priv, reg);
128 		if ((buffer & bits) == bits)
129 			return 1;
130 	}
131 	return 0;
132 }
133 
134 static int p54spi_spi_write_dma(struct p54s_priv *priv, __le32 base,
135 				const void *buf, size_t len)
136 {
137 	if (!p54spi_wait_bit(priv, SPI_ADRS_DMA_WRITE_CTRL, HOST_ALLOWED)) {
138 		dev_err(&priv->spi->dev, "spi_write_dma not allowed "
139 			"to DMA write.\n");
140 		return -EAGAIN;
141 	}
142 
143 	p54spi_write16(priv, SPI_ADRS_DMA_WRITE_CTRL,
144 		       cpu_to_le16(SPI_DMA_WRITE_CTRL_ENABLE));
145 
146 	p54spi_write16(priv, SPI_ADRS_DMA_WRITE_LEN, cpu_to_le16(len));
147 	p54spi_write32(priv, SPI_ADRS_DMA_WRITE_BASE, base);
148 	p54spi_spi_write(priv, SPI_ADRS_DMA_DATA, buf, len);
149 	return 0;
150 }
151 
152 static int p54spi_request_firmware(struct ieee80211_hw *dev)
153 {
154 	struct p54s_priv *priv = dev->priv;
155 	int ret;
156 
157 	/* FIXME: should driver use it's own struct device? */
158 	ret = request_firmware(&priv->firmware, "3826.arm", &priv->spi->dev);
159 
160 	if (ret < 0) {
161 		dev_err(&priv->spi->dev, "request_firmware() failed: %d", ret);
162 		return ret;
163 	}
164 
165 	ret = p54_parse_firmware(dev, priv->firmware);
166 	if (ret) {
167 		release_firmware(priv->firmware);
168 		return ret;
169 	}
170 
171 	return 0;
172 }
173 
174 static int p54spi_request_eeprom(struct ieee80211_hw *dev)
175 {
176 	struct p54s_priv *priv = dev->priv;
177 	const struct firmware *eeprom;
178 	int ret;
179 
180 	/* allow users to customize their eeprom.
181 	 */
182 
183 	ret = request_firmware_direct(&eeprom, "3826.eeprom", &priv->spi->dev);
184 	if (ret < 0) {
185 #ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
186 		dev_info(&priv->spi->dev, "loading default eeprom...\n");
187 		ret = p54_parse_eeprom(dev, (void *) p54spi_eeprom,
188 				       sizeof(p54spi_eeprom));
189 #else
190 		dev_err(&priv->spi->dev, "Failed to request user eeprom\n");
191 #endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
192 	} else {
193 		dev_info(&priv->spi->dev, "loading user eeprom...\n");
194 		ret = p54_parse_eeprom(dev, (void *) eeprom->data,
195 				       (int)eeprom->size);
196 		release_firmware(eeprom);
197 	}
198 	return ret;
199 }
200 
201 static int p54spi_upload_firmware(struct ieee80211_hw *dev)
202 {
203 	struct p54s_priv *priv = dev->priv;
204 	unsigned long fw_len, _fw_len;
205 	unsigned int offset = 0;
206 	int err = 0;
207 	u8 *fw;
208 
209 	fw_len = priv->firmware->size;
210 	fw = kmemdup(priv->firmware->data, fw_len, GFP_KERNEL);
211 	if (!fw)
212 		return -ENOMEM;
213 
214 	/* stop the device */
215 	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
216 		       SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
217 		       SPI_CTRL_STAT_START_HALTED));
218 
219 	msleep(TARGET_BOOT_SLEEP);
220 
221 	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
222 		       SPI_CTRL_STAT_HOST_OVERRIDE |
223 		       SPI_CTRL_STAT_START_HALTED));
224 
225 	msleep(TARGET_BOOT_SLEEP);
226 
227 	while (fw_len > 0) {
228 		_fw_len = min_t(long, fw_len, SPI_MAX_PACKET_SIZE);
229 
230 		err = p54spi_spi_write_dma(priv, cpu_to_le32(
231 					   ISL38XX_DEV_FIRMWARE_ADDR + offset),
232 					   (fw + offset), _fw_len);
233 		if (err < 0)
234 			goto out;
235 
236 		fw_len -= _fw_len;
237 		offset += _fw_len;
238 	}
239 
240 	BUG_ON(fw_len != 0);
241 
242 	/* enable host interrupts */
243 	p54spi_write32(priv, SPI_ADRS_HOST_INT_EN,
244 		       cpu_to_le32(SPI_HOST_INTS_DEFAULT));
245 
246 	/* boot the device */
247 	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
248 		       SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
249 		       SPI_CTRL_STAT_RAM_BOOT));
250 
251 	msleep(TARGET_BOOT_SLEEP);
252 
253 	p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
254 		       SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_RAM_BOOT));
255 	msleep(TARGET_BOOT_SLEEP);
256 
257 out:
258 	kfree(fw);
259 	return err;
260 }
261 
262 static void p54spi_power_off(struct p54s_priv *priv)
263 {
264 	disable_irq(gpio_to_irq(p54spi_gpio_irq));
265 	gpio_set_value(p54spi_gpio_power, 0);
266 }
267 
268 static void p54spi_power_on(struct p54s_priv *priv)
269 {
270 	gpio_set_value(p54spi_gpio_power, 1);
271 	enable_irq(gpio_to_irq(p54spi_gpio_irq));
272 
273 	/* need to wait a while before device can be accessed, the length
274 	 * is just a guess
275 	 */
276 	msleep(10);
277 }
278 
279 static inline void p54spi_int_ack(struct p54s_priv *priv, u32 val)
280 {
281 	p54spi_write32(priv, SPI_ADRS_HOST_INT_ACK, cpu_to_le32(val));
282 }
283 
284 static int p54spi_wakeup(struct p54s_priv *priv)
285 {
286 	/* wake the chip */
287 	p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
288 		       cpu_to_le32(SPI_TARGET_INT_WAKEUP));
289 
290 	/* And wait for the READY interrupt */
291 	if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS,
292 			     SPI_HOST_INT_READY)) {
293 		dev_err(&priv->spi->dev, "INT_READY timeout\n");
294 		return -EBUSY;
295 	}
296 
297 	p54spi_int_ack(priv, SPI_HOST_INT_READY);
298 	return 0;
299 }
300 
301 static inline void p54spi_sleep(struct p54s_priv *priv)
302 {
303 	p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
304 		       cpu_to_le32(SPI_TARGET_INT_SLEEP));
305 }
306 
307 static void p54spi_int_ready(struct p54s_priv *priv)
308 {
309 	p54spi_write32(priv, SPI_ADRS_HOST_INT_EN, cpu_to_le32(
310 		       SPI_HOST_INT_UPDATE | SPI_HOST_INT_SW_UPDATE));
311 
312 	switch (priv->fw_state) {
313 	case FW_STATE_BOOTING:
314 		priv->fw_state = FW_STATE_READY;
315 		complete(&priv->fw_comp);
316 		break;
317 	case FW_STATE_RESETTING:
318 		priv->fw_state = FW_STATE_READY;
319 		/* TODO: reinitialize state */
320 		break;
321 	default:
322 		break;
323 	}
324 }
325 
326 static int p54spi_rx(struct p54s_priv *priv)
327 {
328 	struct sk_buff *skb;
329 	u16 len;
330 	u16 rx_head[2];
331 #define READAHEAD_SZ (sizeof(rx_head)-sizeof(u16))
332 
333 	if (p54spi_wakeup(priv) < 0)
334 		return -EBUSY;
335 
336 	/* Read data size and first data word in one SPI transaction
337 	 * This is workaround for firmware/DMA bug,
338 	 * when first data word gets lost under high load.
339 	 */
340 	p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, rx_head, sizeof(rx_head));
341 	len = rx_head[0];
342 
343 	if (len == 0) {
344 		p54spi_sleep(priv);
345 		dev_err(&priv->spi->dev, "rx request of zero bytes\n");
346 		return 0;
347 	}
348 
349 	/* Firmware may insert up to 4 padding bytes after the lmac header,
350 	 * but it does not amend the size of SPI data transfer.
351 	 * Such packets has correct data size in header, thus referencing
352 	 * past the end of allocated skb. Reserve extra 4 bytes for this case
353 	 */
354 	skb = dev_alloc_skb(len + 4);
355 	if (!skb) {
356 		p54spi_sleep(priv);
357 		dev_err(&priv->spi->dev, "could not alloc skb");
358 		return -ENOMEM;
359 	}
360 
361 	if (len <= READAHEAD_SZ) {
362 		skb_put_data(skb, rx_head + 1, len);
363 	} else {
364 		skb_put_data(skb, rx_head + 1, READAHEAD_SZ);
365 		p54spi_spi_read(priv, SPI_ADRS_DMA_DATA,
366 				skb_put(skb, len - READAHEAD_SZ),
367 				len - READAHEAD_SZ);
368 	}
369 	p54spi_sleep(priv);
370 	/* Put additional bytes to compensate for the possible
371 	 * alignment-caused truncation
372 	 */
373 	skb_put(skb, 4);
374 
375 	if (p54_rx(priv->hw, skb) == 0)
376 		dev_kfree_skb(skb);
377 
378 	return 0;
379 }
380 
381 
382 static irqreturn_t p54spi_interrupt(int irq, void *config)
383 {
384 	struct spi_device *spi = config;
385 	struct p54s_priv *priv = spi_get_drvdata(spi);
386 
387 	ieee80211_queue_work(priv->hw, &priv->work);
388 
389 	return IRQ_HANDLED;
390 }
391 
392 static int p54spi_tx_frame(struct p54s_priv *priv, struct sk_buff *skb)
393 {
394 	struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
395 	int ret = 0;
396 
397 	if (p54spi_wakeup(priv) < 0)
398 		return -EBUSY;
399 
400 	ret = p54spi_spi_write_dma(priv, hdr->req_id, skb->data, skb->len);
401 	if (ret < 0)
402 		goto out;
403 
404 	if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS,
405 			     SPI_HOST_INT_WR_READY)) {
406 		dev_err(&priv->spi->dev, "WR_READY timeout\n");
407 		ret = -EAGAIN;
408 		goto out;
409 	}
410 
411 	p54spi_int_ack(priv, SPI_HOST_INT_WR_READY);
412 
413 	if (FREE_AFTER_TX(skb))
414 		p54_free_skb(priv->hw, skb);
415 out:
416 	p54spi_sleep(priv);
417 	return ret;
418 }
419 
420 static int p54spi_wq_tx(struct p54s_priv *priv)
421 {
422 	struct p54s_tx_info *entry;
423 	struct sk_buff *skb;
424 	struct ieee80211_tx_info *info;
425 	struct p54_tx_info *minfo;
426 	struct p54s_tx_info *dinfo;
427 	unsigned long flags;
428 	int ret = 0;
429 
430 	spin_lock_irqsave(&priv->tx_lock, flags);
431 
432 	while (!list_empty(&priv->tx_pending)) {
433 		entry = list_entry(priv->tx_pending.next,
434 				   struct p54s_tx_info, tx_list);
435 
436 		list_del_init(&entry->tx_list);
437 
438 		spin_unlock_irqrestore(&priv->tx_lock, flags);
439 
440 		dinfo = container_of((void *) entry, struct p54s_tx_info,
441 				     tx_list);
442 		minfo = container_of((void *) dinfo, struct p54_tx_info,
443 				     data);
444 		info = container_of((void *) minfo, struct ieee80211_tx_info,
445 				    rate_driver_data);
446 		skb = container_of((void *) info, struct sk_buff, cb);
447 
448 		ret = p54spi_tx_frame(priv, skb);
449 
450 		if (ret < 0) {
451 			p54_free_skb(priv->hw, skb);
452 			return ret;
453 		}
454 
455 		spin_lock_irqsave(&priv->tx_lock, flags);
456 	}
457 	spin_unlock_irqrestore(&priv->tx_lock, flags);
458 	return ret;
459 }
460 
461 static void p54spi_op_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
462 {
463 	struct p54s_priv *priv = dev->priv;
464 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
465 	struct p54_tx_info *mi = (struct p54_tx_info *) info->rate_driver_data;
466 	struct p54s_tx_info *di = (struct p54s_tx_info *) mi->data;
467 	unsigned long flags;
468 
469 	BUILD_BUG_ON(sizeof(*di) > sizeof((mi->data)));
470 
471 	spin_lock_irqsave(&priv->tx_lock, flags);
472 	list_add_tail(&di->tx_list, &priv->tx_pending);
473 	spin_unlock_irqrestore(&priv->tx_lock, flags);
474 
475 	ieee80211_queue_work(priv->hw, &priv->work);
476 }
477 
478 static void p54spi_work(struct work_struct *work)
479 {
480 	struct p54s_priv *priv = container_of(work, struct p54s_priv, work);
481 	u32 ints;
482 	int ret;
483 
484 	mutex_lock(&priv->mutex);
485 
486 	if (priv->fw_state == FW_STATE_OFF)
487 		goto out;
488 
489 	ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
490 
491 	if (ints & SPI_HOST_INT_READY) {
492 		p54spi_int_ready(priv);
493 		p54spi_int_ack(priv, SPI_HOST_INT_READY);
494 	}
495 
496 	if (priv->fw_state != FW_STATE_READY)
497 		goto out;
498 
499 	if (ints & SPI_HOST_INT_UPDATE) {
500 		p54spi_int_ack(priv, SPI_HOST_INT_UPDATE);
501 		ret = p54spi_rx(priv);
502 		if (ret < 0)
503 			goto out;
504 	}
505 	if (ints & SPI_HOST_INT_SW_UPDATE) {
506 		p54spi_int_ack(priv, SPI_HOST_INT_SW_UPDATE);
507 		ret = p54spi_rx(priv);
508 		if (ret < 0)
509 			goto out;
510 	}
511 
512 	ret = p54spi_wq_tx(priv);
513 out:
514 	mutex_unlock(&priv->mutex);
515 }
516 
517 static int p54spi_op_start(struct ieee80211_hw *dev)
518 {
519 	struct p54s_priv *priv = dev->priv;
520 	unsigned long timeout;
521 	int ret = 0;
522 
523 	if (mutex_lock_interruptible(&priv->mutex)) {
524 		ret = -EINTR;
525 		goto out;
526 	}
527 
528 	priv->fw_state = FW_STATE_BOOTING;
529 
530 	p54spi_power_on(priv);
531 
532 	ret = p54spi_upload_firmware(dev);
533 	if (ret < 0) {
534 		p54spi_power_off(priv);
535 		goto out_unlock;
536 	}
537 
538 	mutex_unlock(&priv->mutex);
539 
540 	timeout = msecs_to_jiffies(2000);
541 	timeout = wait_for_completion_interruptible_timeout(&priv->fw_comp,
542 							    timeout);
543 	if (!timeout) {
544 		dev_err(&priv->spi->dev, "firmware boot failed");
545 		p54spi_power_off(priv);
546 		ret = -1;
547 		goto out;
548 	}
549 
550 	if (mutex_lock_interruptible(&priv->mutex)) {
551 		ret = -EINTR;
552 		p54spi_power_off(priv);
553 		goto out;
554 	}
555 
556 	WARN_ON(priv->fw_state != FW_STATE_READY);
557 
558 out_unlock:
559 	mutex_unlock(&priv->mutex);
560 
561 out:
562 	return ret;
563 }
564 
565 static void p54spi_op_stop(struct ieee80211_hw *dev)
566 {
567 	struct p54s_priv *priv = dev->priv;
568 	unsigned long flags;
569 
570 	mutex_lock(&priv->mutex);
571 	WARN_ON(priv->fw_state != FW_STATE_READY);
572 
573 	p54spi_power_off(priv);
574 	spin_lock_irqsave(&priv->tx_lock, flags);
575 	INIT_LIST_HEAD(&priv->tx_pending);
576 	spin_unlock_irqrestore(&priv->tx_lock, flags);
577 
578 	priv->fw_state = FW_STATE_OFF;
579 	mutex_unlock(&priv->mutex);
580 
581 	cancel_work_sync(&priv->work);
582 }
583 
584 static int p54spi_probe(struct spi_device *spi)
585 {
586 	struct p54s_priv *priv = NULL;
587 	struct ieee80211_hw *hw;
588 	int ret = -EINVAL;
589 
590 	hw = p54_init_common(sizeof(*priv));
591 	if (!hw) {
592 		dev_err(&spi->dev, "could not alloc ieee80211_hw");
593 		return -ENOMEM;
594 	}
595 
596 	priv = hw->priv;
597 	priv->hw = hw;
598 	spi_set_drvdata(spi, priv);
599 	priv->spi = spi;
600 
601 	spi->bits_per_word = 16;
602 	spi->max_speed_hz = 24000000;
603 
604 	ret = spi_setup(spi);
605 	if (ret < 0) {
606 		dev_err(&priv->spi->dev, "spi_setup failed");
607 		goto err_free;
608 	}
609 
610 	ret = gpio_request(p54spi_gpio_power, "p54spi power");
611 	if (ret < 0) {
612 		dev_err(&priv->spi->dev, "power GPIO request failed: %d", ret);
613 		goto err_free;
614 	}
615 
616 	ret = gpio_request(p54spi_gpio_irq, "p54spi irq");
617 	if (ret < 0) {
618 		dev_err(&priv->spi->dev, "irq GPIO request failed: %d", ret);
619 		goto err_free_gpio_power;
620 	}
621 
622 	gpio_direction_output(p54spi_gpio_power, 0);
623 	gpio_direction_input(p54spi_gpio_irq);
624 
625 	ret = request_irq(gpio_to_irq(p54spi_gpio_irq),
626 			  p54spi_interrupt, 0, "p54spi",
627 			  priv->spi);
628 	if (ret < 0) {
629 		dev_err(&priv->spi->dev, "request_irq() failed");
630 		goto err_free_gpio_irq;
631 	}
632 
633 	irq_set_irq_type(gpio_to_irq(p54spi_gpio_irq), IRQ_TYPE_EDGE_RISING);
634 
635 	disable_irq(gpio_to_irq(p54spi_gpio_irq));
636 
637 	INIT_WORK(&priv->work, p54spi_work);
638 	init_completion(&priv->fw_comp);
639 	INIT_LIST_HEAD(&priv->tx_pending);
640 	mutex_init(&priv->mutex);
641 	spin_lock_init(&priv->tx_lock);
642 	SET_IEEE80211_DEV(hw, &spi->dev);
643 	priv->common.open = p54spi_op_start;
644 	priv->common.stop = p54spi_op_stop;
645 	priv->common.tx = p54spi_op_tx;
646 
647 	ret = p54spi_request_firmware(hw);
648 	if (ret < 0)
649 		goto err_free_common;
650 
651 	ret = p54spi_request_eeprom(hw);
652 	if (ret)
653 		goto err_free_common;
654 
655 	ret = p54_register_common(hw, &priv->spi->dev);
656 	if (ret)
657 		goto err_free_common;
658 
659 	return 0;
660 
661 err_free_common:
662 	free_irq(gpio_to_irq(p54spi_gpio_irq), spi);
663 err_free_gpio_irq:
664 	gpio_free(p54spi_gpio_irq);
665 err_free_gpio_power:
666 	gpio_free(p54spi_gpio_power);
667 err_free:
668 	p54_free_common(priv->hw);
669 	return ret;
670 }
671 
672 static void p54spi_remove(struct spi_device *spi)
673 {
674 	struct p54s_priv *priv = spi_get_drvdata(spi);
675 
676 	p54_unregister_common(priv->hw);
677 
678 	free_irq(gpio_to_irq(p54spi_gpio_irq), spi);
679 
680 	gpio_free(p54spi_gpio_power);
681 	gpio_free(p54spi_gpio_irq);
682 	release_firmware(priv->firmware);
683 
684 	mutex_destroy(&priv->mutex);
685 
686 	p54_free_common(priv->hw);
687 }
688 
689 
690 static struct spi_driver p54spi_driver = {
691 	.driver = {
692 		.name		= "p54spi",
693 	},
694 
695 	.probe		= p54spi_probe,
696 	.remove		= p54spi_remove,
697 };
698 
699 module_spi_driver(p54spi_driver);
700 
701 MODULE_LICENSE("GPL");
702 MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
703 MODULE_ALIAS("spi:cx3110x");
704 MODULE_ALIAS("spi:p54spi");
705 MODULE_ALIAS("spi:stlc45xx");
706