[deliverable/linux.git] / sound / soc / blackfin / bf6xx-sport.c

/*
 * bf6xx_sport.c Analog Devices BF6XX SPORT driver
 *
 * Copyright (c) 2012 Analog Devices Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <asm/blackfin.h>
#include <asm/dma.h>
#include <asm/portmux.h>

#include "bf6xx-sport.h"

int sport_set_tx_params(struct sport_device *sport,
			struct sport_params *params)
{
	if (sport->tx_regs->spctl & SPORT_CTL_SPENPRI)
		return -EBUSY;
	sport->tx_regs->spctl = params->spctl | SPORT_CTL_SPTRAN;
	sport->tx_regs->div = params->div;
	SSYNC();
	return 0;
}
EXPORT_SYMBOL(sport_set_tx_params);

int sport_set_rx_params(struct sport_device *sport,
			struct sport_params *params)
{
	if (sport->rx_regs->spctl & SPORT_CTL_SPENPRI)
		return -EBUSY;
	sport->rx_regs->spctl = params->spctl & ~SPORT_CTL_SPTRAN;
	sport->rx_regs->div = params->div;
	SSYNC();
	return 0;
}
EXPORT_SYMBOL(sport_set_rx_params);

static int compute_wdsize(size_t wdsize)
{
	switch (wdsize) {
	case 1:
		return WDSIZE_8 | PSIZE_8;
	case 2:
		return WDSIZE_16 | PSIZE_16;
	default:
		return WDSIZE_32 | PSIZE_32;
	}
}

void sport_tx_start(struct sport_device *sport)
{
	set_dma_next_desc_addr(sport->tx_dma_chan, sport->tx_desc);
	set_dma_config(sport->tx_dma_chan, DMAFLOW_LIST | DI_EN
			| compute_wdsize(sport->wdsize) | NDSIZE_6);
	enable_dma(sport->tx_dma_chan);
	sport->tx_regs->spctl |= SPORT_CTL_SPENPRI;
	SSYNC();
}
EXPORT_SYMBOL(sport_tx_start);

void sport_rx_start(struct sport_device *sport)
{
	set_dma_next_desc_addr(sport->rx_dma_chan, sport->rx_desc);
	set_dma_config(sport->rx_dma_chan, DMAFLOW_LIST | DI_EN | WNR
			| compute_wdsize(sport->wdsize) | NDSIZE_6);
	enable_dma(sport->rx_dma_chan);
	sport->rx_regs->spctl |= SPORT_CTL_SPENPRI;
	SSYNC();
}
EXPORT_SYMBOL(sport_rx_start);

void sport_tx_stop(struct sport_device *sport)
{
	sport->tx_regs->spctl &= ~SPORT_CTL_SPENPRI;
	SSYNC();
	disable_dma(sport->tx_dma_chan);
}
EXPORT_SYMBOL(sport_tx_stop);

void sport_rx_stop(struct sport_device *sport)
{
	sport->rx_regs->spctl &= ~SPORT_CTL_SPENPRI;
	SSYNC();
	disable_dma(sport->rx_dma_chan);
}
EXPORT_SYMBOL(sport_rx_stop);

void sport_set_tx_callback(struct sport_device *sport,
		void (*tx_callback)(void *), void *tx_data)
{
	sport->tx_callback = tx_callback;
	sport->tx_data = tx_data;
}
EXPORT_SYMBOL(sport_set_tx_callback);

void sport_set_rx_callback(struct sport_device *sport,
		void (*rx_callback)(void *), void *rx_data)
{
	sport->rx_callback = rx_callback;
	sport->rx_data = rx_data;
}
EXPORT_SYMBOL(sport_set_rx_callback);

static void setup_desc(struct dmasg *desc, void *buf, int fragcount,
		size_t fragsize, unsigned int cfg,
		unsigned int count, size_t wdsize)
{

	int i;

	for (i = 0; i < fragcount; ++i) {
		desc[i].next_desc_addr  = &(desc[i + 1]);
		desc[i].start_addr = (unsigned long)buf + i*fragsize;
		desc[i].cfg = cfg;
		desc[i].x_count = count;
		desc[i].x_modify = wdsize;
		desc[i].y_count = 0;
		desc[i].y_modify = 0;
	}

	/* make circular */
	desc[fragcount-1].next_desc_addr = desc;
}

int sport_config_tx_dma(struct sport_device *sport, void *buf,
		int fragcount, size_t fragsize)
{
	unsigned int count;
	unsigned int cfg;
	dma_addr_t addr;

	count = fragsize/sport->wdsize;

	if (sport->tx_desc)
		dma_free_coherent(NULL, sport->tx_desc_size,
				sport->tx_desc, 0);

	sport->tx_desc = dma_alloc_coherent(NULL,
			fragcount * sizeof(struct dmasg), &addr, 0);
	sport->tx_desc_size = fragcount * sizeof(struct dmasg);
	if (!sport->tx_desc)
		return -ENOMEM;

	sport->tx_buf = buf;
	sport->tx_fragsize = fragsize;
	sport->tx_frags = fragcount;
	cfg = DMAFLOW_LIST | DI_EN | compute_wdsize(sport->wdsize) | NDSIZE_6;

	setup_desc(sport->tx_desc, buf, fragcount, fragsize,
			cfg|DMAEN, count, sport->wdsize);

	return 0;
}
EXPORT_SYMBOL(sport_config_tx_dma);

int sport_config_rx_dma(struct sport_device *sport, void *buf,
		int fragcount, size_t fragsize)
{
	unsigned int count;
	unsigned int cfg;
	dma_addr_t addr;

	count = fragsize/sport->wdsize;

	if (sport->rx_desc)
		dma_free_coherent(NULL, sport->rx_desc_size,
				sport->rx_desc, 0);

	sport->rx_desc = dma_alloc_coherent(NULL,
			fragcount * sizeof(struct dmasg), &addr, 0);
	sport->rx_desc_size = fragcount * sizeof(struct dmasg);
	if (!sport->rx_desc)
		return -ENOMEM;

	sport->rx_buf = buf;
	sport->rx_fragsize = fragsize;
	sport->rx_frags = fragcount;
	cfg = DMAFLOW_LIST | DI_EN | compute_wdsize(sport->wdsize)
		| WNR | NDSIZE_6;

	setup_desc(sport->rx_desc, buf, fragcount, fragsize,
			cfg|DMAEN, count, sport->wdsize);

	return 0;
}
EXPORT_SYMBOL(sport_config_rx_dma);

unsigned long sport_curr_offset_tx(struct sport_device *sport)
{
	unsigned long curr = get_dma_curr_addr(sport->tx_dma_chan);

	return (unsigned char *)curr - sport->tx_buf;
}
EXPORT_SYMBOL(sport_curr_offset_tx);

unsigned long sport_curr_offset_rx(struct sport_device *sport)
{
	unsigned long curr = get_dma_curr_addr(sport->rx_dma_chan);

	return (unsigned char *)curr - sport->rx_buf;
}
EXPORT_SYMBOL(sport_curr_offset_rx);

static irqreturn_t sport_tx_irq(int irq, void *dev_id)
{
	struct sport_device *sport = dev_id;
	static unsigned long status;

	status = get_dma_curr_irqstat(sport->tx_dma_chan);
	if (status & (DMA_DONE|DMA_ERR)) {
		clear_dma_irqstat(sport->tx_dma_chan);
		SSYNC();
	}
	if (sport->tx_callback)
		sport->tx_callback(sport->tx_data);
	return IRQ_HANDLED;
}

static irqreturn_t sport_rx_irq(int irq, void *dev_id)
{
	struct sport_device *sport = dev_id;
	unsigned long status;

	status = get_dma_curr_irqstat(sport->rx_dma_chan);
	if (status & (DMA_DONE|DMA_ERR)) {
		clear_dma_irqstat(sport->rx_dma_chan);
		SSYNC();
	}
	if (sport->rx_callback)
		sport->rx_callback(sport->rx_data);
	return IRQ_HANDLED;
}

static irqreturn_t sport_err_irq(int irq, void *dev_id)
{
	struct sport_device *sport = dev_id;
	struct device *dev = &sport->pdev->dev;

	if (sport->tx_regs->spctl & SPORT_CTL_DERRPRI)
		dev_err(dev, "sport error: TUVF\n");
	if (sport->rx_regs->spctl & SPORT_CTL_DERRPRI)
		dev_err(dev, "sport error: ROVF\n");

	return IRQ_HANDLED;
}

static int sport_get_resource(struct sport_device *sport)
{
	struct platform_device *pdev = sport->pdev;
	struct device *dev = &pdev->dev;
	struct bfin_snd_platform_data *pdata = dev->platform_data;
	struct resource *res;

	if (!pdata) {
		dev_err(dev, "No platform data\n");
		return -ENODEV;
	}
	sport->pin_req = pdata->pin_req;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(dev, "No tx MEM resource\n");
		return -ENODEV;
	}
	sport->tx_regs = (struct sport_register *)res->start;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res) {
		dev_err(dev, "No rx MEM resource\n");
		return -ENODEV;
	}
	sport->rx_regs = (struct sport_register *)res->start;

	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	if (!res) {
		dev_err(dev, "No tx DMA resource\n");
		return -ENODEV;
	}
	sport->tx_dma_chan = res->start;

	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	if (!res) {
		dev_err(dev, "No rx DMA resource\n");
		return -ENODEV;
	}
	sport->rx_dma_chan = res->start;

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
		dev_err(dev, "No tx error irq resource\n");
		return -ENODEV;
	}
	sport->tx_err_irq = res->start;

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
	if (!res) {
		dev_err(dev, "No rx error irq resource\n");
		return -ENODEV;
	}
	sport->rx_err_irq = res->start;

	return 0;
}

static int sport_request_resource(struct sport_device *sport)
{
	struct device *dev = &sport->pdev->dev;
	int ret;

	ret = peripheral_request_list(sport->pin_req, "soc-audio");
	if (ret) {
		dev_err(dev, "Unable to request sport pin\n");
		return ret;
	}

	ret = request_dma(sport->tx_dma_chan, "SPORT TX Data");
	if (ret) {
		dev_err(dev, "Unable to allocate DMA channel for sport tx\n");
		goto err_tx_dma;
	}
	set_dma_callback(sport->tx_dma_chan, sport_tx_irq, sport);

	ret = request_dma(sport->rx_dma_chan, "SPORT RX Data");
	if (ret) {
		dev_err(dev, "Unable to allocate DMA channel for sport rx\n");
		goto err_rx_dma;
	}
	set_dma_callback(sport->rx_dma_chan, sport_rx_irq, sport);

	ret = request_irq(sport->tx_err_irq, sport_err_irq,
			0, "SPORT TX ERROR", sport);
	if (ret) {
		dev_err(dev, "Unable to allocate tx error IRQ for sport\n");
		goto err_tx_irq;
	}

	ret = request_irq(sport->rx_err_irq, sport_err_irq,
			0, "SPORT RX ERROR", sport);
	if (ret) {
		dev_err(dev, "Unable to allocate rx error IRQ for sport\n");
		goto err_rx_irq;
	}

	return 0;
err_rx_irq:
	free_irq(sport->tx_err_irq, sport);
err_tx_irq:
	free_dma(sport->rx_dma_chan);
err_rx_dma:
	free_dma(sport->tx_dma_chan);
err_tx_dma:
	peripheral_free_list(sport->pin_req);
	return ret;
}

static void sport_free_resource(struct sport_device *sport)
{
	free_irq(sport->rx_err_irq, sport);
	free_irq(sport->tx_err_irq, sport);
	free_dma(sport->rx_dma_chan);
	free_dma(sport->tx_dma_chan);
	peripheral_free_list(sport->pin_req);
}

struct sport_device *sport_create(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct sport_device *sport;
	int ret;

	sport = kzalloc(sizeof(*sport), GFP_KERNEL);
	if (!sport) {
		dev_err(dev, "Unable to allocate memory for sport device\n");
		return NULL;
	}
	sport->pdev = pdev;

	ret = sport_get_resource(sport);
	if (ret) {
		kfree(sport);
		return NULL;
	}

	ret = sport_request_resource(sport);
	if (ret) {
		kfree(sport);
		return NULL;
	}

	dev_dbg(dev, "SPORT create success\n");
	return sport;
}
EXPORT_SYMBOL(sport_create);

void sport_delete(struct sport_device *sport)
{
	if (sport->tx_desc)
		dma_free_coherent(NULL, sport->tx_desc_size,
				sport->tx_desc, 0);
	if (sport->rx_desc)
		dma_free_coherent(NULL, sport->rx_desc_size,
				sport->rx_desc, 0);
	sport_free_resource(sport);
	kfree(sport);
}
EXPORT_SYMBOL(sport_delete);

MODULE_DESCRIPTION("Analog Devices BF6XX SPORT driver");
MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d2aae47f SJ	1	/*
	2	* bf6xx_sport.c Analog Devices BF6XX SPORT driver
	3	*
	4	* Copyright (c) 2012 Analog Devices Inc.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	18	*/
	19
	20	#include <linux/device.h>
	21	#include <linux/dma-mapping.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/module.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/slab.h>
	26
	27	#include <asm/blackfin.h>
	28	#include <asm/dma.h>
	29	#include <asm/portmux.h>
	30
	31	#include "bf6xx-sport.h"
	32
	33	int sport_set_tx_params(struct sport_device *sport,
	34	struct sport_params *params)
	35	{
	36	if (sport->tx_regs->spctl & SPORT_CTL_SPENPRI)
	37	return -EBUSY;
	38	sport->tx_regs->spctl = params->spctl \| SPORT_CTL_SPTRAN;
	39	sport->tx_regs->div = params->div;
	40	SSYNC();
	41	return 0;
	42	}
	43	EXPORT_SYMBOL(sport_set_tx_params);
	44
	45	int sport_set_rx_params(struct sport_device *sport,
	46	struct sport_params *params)
	47	{
	48	if (sport->rx_regs->spctl & SPORT_CTL_SPENPRI)
	49	return -EBUSY;
	50	sport->rx_regs->spctl = params->spctl & ~SPORT_CTL_SPTRAN;
	51	sport->rx_regs->div = params->div;
	52	SSYNC();
	53	return 0;
	54	}
	55	EXPORT_SYMBOL(sport_set_rx_params);
	56
	57	static int compute_wdsize(size_t wdsize)
	58	{
	59	switch (wdsize) {
	60	case 1:
	61	return WDSIZE_8 \| PSIZE_8;
	62	case 2:
	63	return WDSIZE_16 \| PSIZE_16;
	64	default:
65	return WDSIZE_32 \| PSIZE_32;
66	}
67	}
68
69	void sport_tx_start(struct sport_device *sport)
70	{
71	set_dma_next_desc_addr(sport->tx_dma_chan, sport->tx_desc);
72	set_dma_config(sport->tx_dma_chan, DMAFLOW_LIST \| DI_EN
73	\| compute_wdsize(sport->wdsize) \| NDSIZE_6);
74	enable_dma(sport->tx_dma_chan);
75	sport->tx_regs->spctl \|= SPORT_CTL_SPENPRI;
76	SSYNC();
77	}
78	EXPORT_SYMBOL(sport_tx_start);
79
80	void sport_rx_start(struct sport_device *sport)
81	{
82	set_dma_next_desc_addr(sport->rx_dma_chan, sport->rx_desc);
83	set_dma_config(sport->rx_dma_chan, DMAFLOW_LIST \| DI_EN \| WNR
84	\| compute_wdsize(sport->wdsize) \| NDSIZE_6);
85	enable_dma(sport->rx_dma_chan);
86	sport->rx_regs->spctl \|= SPORT_CTL_SPENPRI;
87	SSYNC();
88	}
89	EXPORT_SYMBOL(sport_rx_start);
90
91	void sport_tx_stop(struct sport_device *sport)
92	{
93	sport->tx_regs->spctl &= ~SPORT_CTL_SPENPRI;
94	SSYNC();
95	disable_dma(sport->tx_dma_chan);
96	}
97	EXPORT_SYMBOL(sport_tx_stop);
98
99	void sport_rx_stop(struct sport_device *sport)
100	{
101	sport->rx_regs->spctl &= ~SPORT_CTL_SPENPRI;
102	SSYNC();
103	disable_dma(sport->rx_dma_chan);
104	}
105	EXPORT_SYMBOL(sport_rx_stop);
106
107	void sport_set_tx_callback(struct sport_device *sport,
108	void (tx_callback)(void ), void *tx_data)
109	{
110	sport->tx_callback = tx_callback;
111	sport->tx_data = tx_data;
112	}
113	EXPORT_SYMBOL(sport_set_tx_callback);
114
115	void sport_set_rx_callback(struct sport_device *sport,
116	void (rx_callback)(void ), void *rx_data)
117	{
118	sport->rx_callback = rx_callback;
119	sport->rx_data = rx_data;
120	}
121	EXPORT_SYMBOL(sport_set_rx_callback);
122
123	static void setup_desc(struct dmasg desc, void buf, int fragcount,
124	size_t fragsize, unsigned int cfg,
125	unsigned int count, size_t wdsize)
126	{
127
128	int i;
129
130	for (i = 0; i < fragcount; ++i) {
131	desc[i].next_desc_addr = &(desc[i + 1]);
132	desc[i].start_addr = (unsigned long)buf + i*fragsize;
133	desc[i].cfg = cfg;
134	desc[i].x_count = count;
135	desc[i].x_modify = wdsize;
136	desc[i].y_count = 0;
137	desc[i].y_modify = 0;
138	}
139
140	/* make circular */
141	desc[fragcount-1].next_desc_addr = desc;
142	}
143
144	int sport_config_tx_dma(struct sport_device sport, void buf,
145	int fragcount, size_t fragsize)
146	{
147	unsigned int count;
148	unsigned int cfg;
149	dma_addr_t addr;
150
151	count = fragsize/sport->wdsize;
152
153	if (sport->tx_desc)
154	dma_free_coherent(NULL, sport->tx_desc_size,
155	sport->tx_desc, 0);
156
157	sport->tx_desc = dma_alloc_coherent(NULL,
158	fragcount * sizeof(struct dmasg), &addr, 0);
159	sport->tx_desc_size = fragcount * sizeof(struct dmasg);
160	if (!sport->tx_desc)
161	return -ENOMEM;
162
163	sport->tx_buf = buf;
164	sport->tx_fragsize = fragsize;
165	sport->tx_frags = fragcount;
166	cfg = DMAFLOW_LIST \| DI_EN \| compute_wdsize(sport->wdsize) \| NDSIZE_6;
167
168	setup_desc(sport->tx_desc, buf, fragcount, fragsize,
169	cfg\|DMAEN, count, sport->wdsize);
170
171	return 0;
172	}
173	EXPORT_SYMBOL(sport_config_tx_dma);
174
175	int sport_config_rx_dma(struct sport_device sport, void buf,
176	int fragcount, size_t fragsize)
177	{
178	unsigned int count;
179	unsigned int cfg;
180	dma_addr_t addr;
181
182	count = fragsize/sport->wdsize;
183
184	if (sport->rx_desc)
185	dma_free_coherent(NULL, sport->rx_desc_size,
186	sport->rx_desc, 0);
187
188	sport->rx_desc = dma_alloc_coherent(NULL,
189	fragcount * sizeof(struct dmasg), &addr, 0);
190	sport->rx_desc_size = fragcount * sizeof(struct dmasg);
191	if (!sport->rx_desc)
192	return -ENOMEM;
193
194	sport->rx_buf = buf;
195	sport->rx_fragsize = fragsize;
196	sport->rx_frags = fragcount;
197	cfg = DMAFLOW_LIST \| DI_EN \| compute_wdsize(sport->wdsize)
198	\| WNR \| NDSIZE_6;
199
200	setup_desc(sport->rx_desc, buf, fragcount, fragsize,
201	cfg\|DMAEN, count, sport->wdsize);
202
203	return 0;
204	}
205	EXPORT_SYMBOL(sport_config_rx_dma);
206
207	unsigned long sport_curr_offset_tx(struct sport_device *sport)
208	{
209	unsigned long curr = get_dma_curr_addr(sport->tx_dma_chan);
210
211	return (unsigned char *)curr - sport->tx_buf;
212	}
213	EXPORT_SYMBOL(sport_curr_offset_tx);
214
215	unsigned long sport_curr_offset_rx(struct sport_device *sport)
216	{
217	unsigned long curr = get_dma_curr_addr(sport->rx_dma_chan);
218
219	return (unsigned char *)curr - sport->rx_buf;
220	}
221	EXPORT_SYMBOL(sport_curr_offset_rx);
222
223	static irqreturn_t sport_tx_irq(int irq, void *dev_id)
224	{
225	struct sport_device *sport = dev_id;
226	static unsigned long status;
227
228	status = get_dma_curr_irqstat(sport->tx_dma_chan);
229	if (status & (DMA_DONE\|DMA_ERR)) {
230	clear_dma_irqstat(sport->tx_dma_chan);
231	SSYNC();
232	}
233	if (sport->tx_callback)
234	sport->tx_callback(sport->tx_data);
235	return IRQ_HANDLED;
236	}
237
238	static irqreturn_t sport_rx_irq(int irq, void *dev_id)
239	{
240	struct sport_device *sport = dev_id;
241	unsigned long status;
242
243	status = get_dma_curr_irqstat(sport->rx_dma_chan);
244	if (status & (DMA_DONE\|DMA_ERR)) {
245	clear_dma_irqstat(sport->rx_dma_chan);
246	SSYNC();
247	}
248	if (sport->rx_callback)
249	sport->rx_callback(sport->rx_data);
250	return IRQ_HANDLED;
251	}
252
253	static irqreturn_t sport_err_irq(int irq, void *dev_id)
254	{
255	struct sport_device *sport = dev_id;
256	struct device *dev = &sport->pdev->dev;
257
258	if (sport->tx_regs->spctl & SPORT_CTL_DERRPRI)
f4a63483	259	dev_err(dev, "sport error: TUVF\n");
d2aae47f	260	if (sport->rx_regs->spctl & SPORT_CTL_DERRPRI)
f4a63483	261	dev_err(dev, "sport error: ROVF\n");
d2aae47f SJ	262
	263	return IRQ_HANDLED;
	264	}
	265
	266	static int sport_get_resource(struct sport_device *sport)
	267	{
	268	struct platform_device *pdev = sport->pdev;
	269	struct device *dev = &pdev->dev;
	270	struct bfin_snd_platform_data *pdata = dev->platform_data;
	271	struct resource *res;
	272
	273	if (!pdata) {
	274	dev_err(dev, "No platform data\n");
	275	return -ENODEV;
	276	}
	277	sport->pin_req = pdata->pin_req;
	278
	279	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	280	if (!res) {
	281	dev_err(dev, "No tx MEM resource\n");
	282	return -ENODEV;
	283	}
	284	sport->tx_regs = (struct sport_register *)res->start;
	285
	286	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	287	if (!res) {
	288	dev_err(dev, "No rx MEM resource\n");
	289	return -ENODEV;
	290	}
	291	sport->rx_regs = (struct sport_register *)res->start;
	292
	293	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	294	if (!res) {
	295	dev_err(dev, "No tx DMA resource\n");
	296	return -ENODEV;
	297	}
	298	sport->tx_dma_chan = res->start;
	299
	300	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	301	if (!res) {
	302	dev_err(dev, "No rx DMA resource\n");
	303	return -ENODEV;
	304	}
	305	sport->rx_dma_chan = res->start;
	306
	307	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	308	if (!res) {
	309	dev_err(dev, "No tx error irq resource\n");
	310	return -ENODEV;
	311	}
	312	sport->tx_err_irq = res->start;
	313
	314	res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
	315	if (!res) {
	316	dev_err(dev, "No rx error irq resource\n");
	317	return -ENODEV;
	318	}
	319	sport->rx_err_irq = res->start;
	320
	321	return 0;
	322	}
	323
	324	static int sport_request_resource(struct sport_device *sport)
	325	{
326	struct device *dev = &sport->pdev->dev;
327	int ret;
328
329	ret = peripheral_request_list(sport->pin_req, "soc-audio");
330	if (ret) {
331	dev_err(dev, "Unable to request sport pin\n");
332	return ret;
333	}
334
335	ret = request_dma(sport->tx_dma_chan, "SPORT TX Data");
336	if (ret) {
337	dev_err(dev, "Unable to allocate DMA channel for sport tx\n");
338	goto err_tx_dma;
339	}
340	set_dma_callback(sport->tx_dma_chan, sport_tx_irq, sport);
341
342	ret = request_dma(sport->rx_dma_chan, "SPORT RX Data");
343	if (ret) {
344	dev_err(dev, "Unable to allocate DMA channel for sport rx\n");
345	goto err_rx_dma;
346	}
347	set_dma_callback(sport->rx_dma_chan, sport_rx_irq, sport);
348
349	ret = request_irq(sport->tx_err_irq, sport_err_irq,
350	0, "SPORT TX ERROR", sport);
351	if (ret) {
352	dev_err(dev, "Unable to allocate tx error IRQ for sport\n");
353	goto err_tx_irq;
354	}
355
356	ret = request_irq(sport->rx_err_irq, sport_err_irq,
357	0, "SPORT RX ERROR", sport);
358	if (ret) {
359	dev_err(dev, "Unable to allocate rx error IRQ for sport\n");
360	goto err_rx_irq;
361	}
362
363	return 0;
364	err_rx_irq:
365	free_irq(sport->tx_err_irq, sport);
366	err_tx_irq:
367	free_dma(sport->rx_dma_chan);
368	err_rx_dma:
369	free_dma(sport->tx_dma_chan);
370	err_tx_dma:
371	peripheral_free_list(sport->pin_req);
372	return ret;
373	}
374
375	static void sport_free_resource(struct sport_device *sport)
376	{
377	free_irq(sport->rx_err_irq, sport);
378	free_irq(sport->tx_err_irq, sport);
379	free_dma(sport->rx_dma_chan);
380	free_dma(sport->tx_dma_chan);
381	peripheral_free_list(sport->pin_req);
382	}
383
384	struct sport_device sport_create(struct platform_device pdev)
385	{
386	struct device *dev = &pdev->dev;
387	struct sport_device *sport;
388	int ret;
389
390	sport = kzalloc(sizeof(*sport), GFP_KERNEL);
391	if (!sport) {
392	dev_err(dev, "Unable to allocate memory for sport device\n");
393	return NULL;
394	}
395	sport->pdev = pdev;
396
397	ret = sport_get_resource(sport);
398	if (ret) {
399	kfree(sport);
400	return NULL;
401	}
402
403	ret = sport_request_resource(sport);
404	if (ret) {
405	kfree(sport);
406	return NULL;
407	}
408
409	dev_dbg(dev, "SPORT create success\n");
410	return sport;
411	}
412	EXPORT_SYMBOL(sport_create);
413
414	void sport_delete(struct sport_device *sport)
415	{
8b5eae13 SJ	416	if (sport->tx_desc)
	417	dma_free_coherent(NULL, sport->tx_desc_size,
	418	sport->tx_desc, 0);
	419	if (sport->rx_desc)
	420	dma_free_coherent(NULL, sport->rx_desc_size,
	421	sport->rx_desc, 0);
d2aae47f	422	sport_free_resource(sport);
8b5eae13	423	kfree(sport);
d2aae47f SJ	424	}
	425	EXPORT_SYMBOL(sport_delete);
	426
	427	MODULE_DESCRIPTION("Analog Devices BF6XX SPORT driver");
	428	MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
	429	MODULE_LICENSE("GPL v2");