aboutsummaryrefslogtreecommitdiffstats
path: root/sound/pcmcia/pdaudiocf/pdaudiocf_core.c
blob: 9dce0bde5c05b078ba32ffb5e18b775353c9a7d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
/*
 * Driver for Sound Core PDAudioCF soundcard
 *
 * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/info.h>
#include "pdaudiocf.h"
#include <sound/initval.h>

/*
 *
 */
static unsigned char pdacf_ak4117_read(void *private_data, unsigned char reg)
{
	struct snd_pdacf *chip = private_data;
	unsigned long timeout;
	unsigned long flags;
	unsigned char res;

	spin_lock_irqsave(&chip->ak4117_lock, flags);
	timeout = 1000;
	while (pdacf_reg_read(chip, PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
		udelay(5);
		if (--timeout == 0) {
			spin_unlock_irqrestore(&chip->ak4117_lock, flags);
			snd_printk(KERN_ERR "AK4117 ready timeout (read)\n");
			return 0;
		}
	}
	pdacf_reg_write(chip, PDAUDIOCF_REG_AK_IFR, (u16)reg << 8);
	timeout = 1000;
	while (pdacf_reg_read(chip, PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
		udelay(5);
		if (--timeout == 0) {
			spin_unlock_irqrestore(&chip->ak4117_lock, flags);
			snd_printk(KERN_ERR "AK4117 read timeout (read2)\n");
			return 0;
		}
	}
	res = (unsigned char)pdacf_reg_read(chip, PDAUDIOCF_REG_AK_IFR);
	spin_unlock_irqrestore(&chip->ak4117_lock, flags);
	return res;
}

static void pdacf_ak4117_write(void *private_data, unsigned char reg, unsigned char val)
{
	struct snd_pdacf *chip = private_data;
	unsigned long timeout;
	unsigned long flags;

	spin_lock_irqsave(&chip->ak4117_lock, flags);
	timeout = 1000;
	while (inw(chip->port + PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
		udelay(5);
		if (--timeout == 0) {
			spin_unlock_irqrestore(&chip->ak4117_lock, flags);
			snd_printk(KERN_ERR "AK4117 ready timeout (write)\n");
			return;
		}
	}
	outw((u16)reg << 8 | val | (1<<13), chip->port + PDAUDIOCF_REG_AK_IFR);
	spin_unlock_irqrestore(&chip->ak4117_lock, flags);
}

#if 0
void pdacf_dump(struct snd_pdacf *chip)
{
	printk(KERN_DEBUG "PDAUDIOCF DUMP (0x%lx):\n", chip->port);
	printk(KERN_DEBUG "WPD         : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_WDP));
	printk(KERN_DEBUG "RDP         : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_RDP));
	printk(KERN_DEBUG "TCR         : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_TCR));
	printk(KERN_DEBUG "SCR         : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_SCR));
	printk(KERN_DEBUG "ISR         : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_ISR));
	printk(KERN_DEBUG "IER         : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_IER));
	printk(KERN_DEBUG "AK_IFR      : 0x%x\n",
	       inw(chip->port + PDAUDIOCF_REG_AK_IFR));
}
#endif

static int pdacf_reset(struct snd_pdacf *chip, int powerdown)
{
	u16 val;
	
	val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
	val |= PDAUDIOCF_PDN;
	val &= ~PDAUDIOCF_RECORD;		/* for sure */
	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
	udelay(5);
	val |= PDAUDIOCF_RST;
	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
	udelay(200);
	val &= ~PDAUDIOCF_RST;
	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
	udelay(5);
	if (!powerdown) {
		val &= ~PDAUDIOCF_PDN;
		pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
		udelay(200);
	}
	return 0;
}

void pdacf_reinit(struct snd_pdacf *chip, int resume)
{
	pdacf_reset(chip, 0);
	if (resume)
		pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, chip->suspend_reg_scr);
	snd_ak4117_reinit(chip->ak4117);
	pdacf_reg_write(chip, PDAUDIOCF_REG_TCR, chip->regmap[PDAUDIOCF_REG_TCR>>1]);
	pdacf_reg_write(chip, PDAUDIOCF_REG_IER, chip->regmap[PDAUDIOCF_REG_IER>>1]);
}

static void pdacf_proc_read(struct snd_info_entry * entry,
                            struct snd_info_buffer *buffer)
{
	struct snd_pdacf *chip = entry->private_data;
	u16 tmp;

	snd_iprintf(buffer, "PDAudioCF\n\n");
	tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
	snd_iprintf(buffer, "FPGA revision      : 0x%x\n", PDAUDIOCF_FPGAREV(tmp));
	                                   
}

static void pdacf_proc_init(struct snd_pdacf *chip)
{
	struct snd_info_entry *entry;

	if (! snd_card_proc_new(chip->card, "pdaudiocf", &entry))
		snd_info_set_text_ops(entry, chip, pdacf_proc_read);
}

struct snd_pdacf *snd_pdacf_create(struct snd_card *card)
{
	struct snd_pdacf *chip;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL)
		return NULL;
	chip->card = card;
	spin_lock_init(&chip->reg_lock);
	spin_lock_init(&chip->ak4117_lock);
	tasklet_init(&chip->tq, pdacf_tasklet, (unsigned long)chip);
	card->private_data = chip;

	pdacf_proc_init(chip);
	return chip;
}

static void snd_pdacf_ak4117_change(struct ak4117 *ak4117, unsigned char c0, unsigned char c1)
{
	struct snd_pdacf *chip = ak4117->change_callback_private;
	unsigned long flags;
	u16 val;

	if (!(c0 & AK4117_UNLCK))
		return;
	spin_lock_irqsave(&chip->reg_lock, flags);
	val = chip->regmap[PDAUDIOCF_REG_SCR>>1];
	if (ak4117->rcs0 & AK4117_UNLCK)
		val |= PDAUDIOCF_BLUE_LED_OFF;
	else
		val &= ~PDAUDIOCF_BLUE_LED_OFF;
	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
}

int snd_pdacf_ak4117_create(struct snd_pdacf *chip)
{
	int err;
	u16 val;
	/* design note: if we unmask PLL unlock, parity, valid, audio or auto bit interrupts */
	/* from AK4117 then INT1 pin from AK4117 will be high all time, because PCMCIA interrupts are */
	/* egde based and FPGA does logical OR for all interrupt sources, we cannot use these */
	/* high-rate sources */
	static unsigned char pgm[5] = {
		AK4117_XTL_24_576M | AK4117_EXCT,				/* AK4117_REG_PWRDN */
		AK4117_CM_PLL_XTAL | AK4117_PKCS_128fs | AK4117_XCKS_128fs,	/* AK4117_REQ_CLOCK */
		AK4117_EFH_1024LRCLK | AK4117_DIF_24R | AK4117_IPS,		/* AK4117_REG_IO */
		0xff,								/* AK4117_REG_INT0_MASK */
		AK4117_MAUTO | AK4117_MAUD | AK4117_MULK | AK4117_MPAR | AK4117_MV, /* AK4117_REG_INT1_MASK */
	};

	err = pdacf_reset(chip, 0);
	if (err < 0)
		return err;
	err = snd_ak4117_create(chip->card, pdacf_ak4117_read, pdacf_ak4117_write, pgm, chip, &chip->ak4117);
	if (err < 0)
		return err;

	val = pdacf_reg_read(chip, PDAUDIOCF_REG_TCR);
#if 1 /* normal operation */
	val &= ~(PDAUDIOCF_ELIMAKMBIT|PDAUDIOCF_TESTDATASEL);
#else /* debug */
	val |= PDAUDIOCF_ELIMAKMBIT;
	val &= ~PDAUDIOCF_TESTDATASEL;
#endif
	pdacf_reg_write(chip, PDAUDIOCF_REG_TCR, val);
	
	/* setup the FPGA to match AK4117 setup */
	val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
	val &= ~(PDAUDIOCF_CLKDIV0 | PDAUDIOCF_CLKDIV1);		/* use 24.576Mhz clock */
	val &= ~(PDAUDIOCF_RED_LED_OFF|PDAUDIOCF_BLUE_LED_OFF);
	val |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;			/* 24-bit data */
	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);

	/* setup LEDs and IRQ */
	val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
	val &= ~(PDAUDIOCF_IRQLVLEN0 | PDAUDIOCF_IRQLVLEN1);
	val &= ~(PDAUDIOCF_BLUEDUTY0 | PDAUDIOCF_REDDUTY0 | PDAUDIOCF_REDDUTY1);
	val |= PDAUDIOCF_BLUEDUTY1 | PDAUDIOCF_HALFRATE;
	val |= PDAUDIOCF_IRQOVREN | PDAUDIOCF_IRQAKMEN;
	pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);

	chip->ak4117->change_callback_private = chip;
	chip->ak4117->change_callback = snd_pdacf_ak4117_change;

	/* update LED status */
	snd_pdacf_ak4117_change(chip->ak4117, AK4117_UNLCK, 0);

	return 0;
}

void snd_pdacf_powerdown(struct snd_pdacf *chip)
{
	u16 val;

	val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
	chip->suspend_reg_scr = val;
	val |= PDAUDIOCF_RED_LED_OFF | PDAUDIOCF_BLUE_LED_OFF;
	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
	/* disable interrupts, but use direct write to preserve old register value in chip->regmap */
	val = inw(chip->port + PDAUDIOCF_REG_IER);
	val &= ~(PDAUDIOCF_IRQOVREN|PDAUDIOCF_IRQAKMEN|PDAUDIOCF_IRQLVLEN0|PDAUDIOCF_IRQLVLEN1);
	outw(val, chip->port + PDAUDIOCF_REG_IER);
	pdacf_reset(chip, 1);
}

#ifdef CONFIG_PM

int snd_pdacf_suspend(struct snd_pdacf *chip, pm_message_t state)
{
	u16 val;
	
	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
	snd_pcm_suspend_all(chip->pcm);
	/* disable interrupts, but use direct write to preserve old register value in chip->regmap */
	val = inw(chip->port + PDAUDIOCF_REG_IER);
	val &= ~(PDAUDIOCF_IRQOVREN|PDAUDIOCF_IRQAKMEN|PDAUDIOCF_IRQLVLEN0|PDAUDIOCF_IRQLVLEN1);
	outw(val, chip->port + PDAUDIOCF_REG_IER);
	chip->chip_status |= PDAUDIOCF_STAT_IS_SUSPENDED;	/* ignore interrupts from now */
	snd_pdacf_powerdown(chip);
	return 0;
}

static inline int check_signal(struct snd_pdacf *chip)
{
	return (chip->ak4117->rcs0 & AK4117_UNLCK) == 0;
}

int snd_pdacf_resume(struct snd_pdacf *chip)
{
	int timeout = 40;

	pdacf_reinit(chip, 1);
	/* wait for AK4117's PLL */
	while (timeout-- > 0 &&
	       (snd_ak4117_external_rate(chip->ak4117) <= 0 || !check_signal(chip)))
		mdelay(1);
	chip->chip_status &= ~PDAUDIOCF_STAT_IS_SUSPENDED;
	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
	return 0;
}
#endif