--- /dev/null
+/*
+ * AD1843 low level driver
+ *
+ * Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org>
+ * Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+ *
+ * inspired from vwsnd.c (SGI VW audio driver)
+ * Copyright 1999 Silicon Graphics, Inc. All rights reserved.
+ *
+ * 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/init.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ad1843.h>
+
+/*
+ * AD1843 bitfield definitions. All are named as in the AD1843 data
+ * sheet, with ad1843_ prepended and individual bit numbers removed.
+ *
+ * E.g., bits LSS0 through LSS2 become ad1843_LSS.
+ *
+ * Only the bitfields we need are defined.
+ */
+
+struct ad1843_bitfield {
+ char reg;
+ char lo_bit;
+ char nbits;
+};
+
+static const struct ad1843_bitfield
+ ad1843_PDNO = { 0, 14, 1 }, /* Converter Power-Down Flag */
+ ad1843_INIT = { 0, 15, 1 }, /* Clock Initialization Flag */
+ ad1843_RIG = { 2, 0, 4 }, /* Right ADC Input Gain */
+ ad1843_RMGE = { 2, 4, 1 }, /* Right ADC Mic Gain Enable */
+ ad1843_RSS = { 2, 5, 3 }, /* Right ADC Source Select */
+ ad1843_LIG = { 2, 8, 4 }, /* Left ADC Input Gain */
+ ad1843_LMGE = { 2, 12, 1 }, /* Left ADC Mic Gain Enable */
+ ad1843_LSS = { 2, 13, 3 }, /* Left ADC Source Select */
+ ad1843_RD2M = { 3, 0, 5 }, /* Right DAC 2 Mix Gain/Atten */
+ ad1843_RD2MM = { 3, 7, 1 }, /* Right DAC 2 Mix Mute */
+ ad1843_LD2M = { 3, 8, 5 }, /* Left DAC 2 Mix Gain/Atten */
+ ad1843_LD2MM = { 3, 15, 1 }, /* Left DAC 2 Mix Mute */
+ ad1843_RX1M = { 4, 0, 5 }, /* Right Aux 1 Mix Gain/Atten */
+ ad1843_RX1MM = { 4, 7, 1 }, /* Right Aux 1 Mix Mute */
+ ad1843_LX1M = { 4, 8, 5 }, /* Left Aux 1 Mix Gain/Atten */
+ ad1843_LX1MM = { 4, 15, 1 }, /* Left Aux 1 Mix Mute */
+ ad1843_RX2M = { 5, 0, 5 }, /* Right Aux 2 Mix Gain/Atten */
+ ad1843_RX2MM = { 5, 7, 1 }, /* Right Aux 2 Mix Mute */
+ ad1843_LX2M = { 5, 8, 5 }, /* Left Aux 2 Mix Gain/Atten */
+ ad1843_LX2MM = { 5, 15, 1 }, /* Left Aux 2 Mix Mute */
+ ad1843_RMCM = { 7, 0, 5 }, /* Right Mic Mix Gain/Atten */
+ ad1843_RMCMM = { 7, 7, 1 }, /* Right Mic Mix Mute */
+ ad1843_LMCM = { 7, 8, 5 }, /* Left Mic Mix Gain/Atten */
+ ad1843_LMCMM = { 7, 15, 1 }, /* Left Mic Mix Mute */
+ ad1843_HPOS = { 8, 4, 1 }, /* Headphone Output Voltage Swing */
+ ad1843_HPOM = { 8, 5, 1 }, /* Headphone Output Mute */
+ ad1843_MPOM = { 8, 6, 1 }, /* Mono Output Mute */
+ ad1843_RDA1G = { 9, 0, 6 }, /* Right DAC1 Analog/Digital Gain */
+ ad1843_RDA1GM = { 9, 7, 1 }, /* Right DAC1 Analog Mute */
+ ad1843_LDA1G = { 9, 8, 6 }, /* Left DAC1 Analog/Digital Gain */
+ ad1843_LDA1GM = { 9, 15, 1 }, /* Left DAC1 Analog Mute */
+ ad1843_RDA2G = { 10, 0, 6 }, /* Right DAC2 Analog/Digital Gain */
+ ad1843_RDA2GM = { 10, 7, 1 }, /* Right DAC2 Analog Mute */
+ ad1843_LDA2G = { 10, 8, 6 }, /* Left DAC2 Analog/Digital Gain */
+ ad1843_LDA2GM = { 10, 15, 1 }, /* Left DAC2 Analog Mute */
+ ad1843_RDA1AM = { 11, 7, 1 }, /* Right DAC1 Digital Mute */
+ ad1843_LDA1AM = { 11, 15, 1 }, /* Left DAC1 Digital Mute */
+ ad1843_RDA2AM = { 12, 7, 1 }, /* Right DAC2 Digital Mute */
+ ad1843_LDA2AM = { 12, 15, 1 }, /* Left DAC2 Digital Mute */
+ ad1843_ADLC = { 15, 0, 2 }, /* ADC Left Sample Rate Source */
+ ad1843_ADRC = { 15, 2, 2 }, /* ADC Right Sample Rate Source */
+ ad1843_DA1C = { 15, 8, 2 }, /* DAC1 Sample Rate Source */
+ ad1843_DA2C = { 15, 10, 2 }, /* DAC2 Sample Rate Source */
+ ad1843_C1C = { 17, 0, 16 }, /* Clock 1 Sample Rate Select */
+ ad1843_C2C = { 20, 0, 16 }, /* Clock 2 Sample Rate Select */
+ ad1843_C3C = { 23, 0, 16 }, /* Clock 3 Sample Rate Select */
+ ad1843_DAADL = { 25, 4, 2 }, /* Digital ADC Left Source Select */
+ ad1843_DAADR = { 25, 6, 2 }, /* Digital ADC Right Source Select */
+ ad1843_DAMIX = { 25, 14, 1 }, /* DAC Digital Mix Enable */
+ ad1843_DRSFLT = { 25, 15, 1 }, /* Digital Reampler Filter Mode */
+ ad1843_ADLF = { 26, 0, 2 }, /* ADC Left Channel Data Format */
+ ad1843_ADRF = { 26, 2, 2 }, /* ADC Right Channel Data Format */
+ ad1843_ADTLK = { 26, 4, 1 }, /* ADC Transmit Lock Mode Select */
+ ad1843_SCF = { 26, 7, 1 }, /* SCLK Frequency Select */
+ ad1843_DA1F = { 26, 8, 2 }, /* DAC1 Data Format Select */
+ ad1843_DA2F = { 26, 10, 2 }, /* DAC2 Data Format Select */
+ ad1843_DA1SM = { 26, 14, 1 }, /* DAC1 Stereo/Mono Mode Select */
+ ad1843_DA2SM = { 26, 15, 1 }, /* DAC2 Stereo/Mono Mode Select */
+ ad1843_ADLEN = { 27, 0, 1 }, /* ADC Left Channel Enable */
+ ad1843_ADREN = { 27, 1, 1 }, /* ADC Right Channel Enable */
+ ad1843_AAMEN = { 27, 4, 1 }, /* Analog to Analog Mix Enable */
+ ad1843_ANAEN = { 27, 7, 1 }, /* Analog Channel Enable */
+ ad1843_DA1EN = { 27, 8, 1 }, /* DAC1 Enable */
+ ad1843_DA2EN = { 27, 9, 1 }, /* DAC2 Enable */
+ ad1843_DDMEN = { 27, 12, 1 }, /* DAC2 to DAC1 Mix Enable */
+ ad1843_C1EN = { 28, 11, 1 }, /* Clock Generator 1 Enable */
+ ad1843_C2EN = { 28, 12, 1 }, /* Clock Generator 2 Enable */
+ ad1843_C3EN = { 28, 13, 1 }, /* Clock Generator 3 Enable */
+ ad1843_PDNI = { 28, 15, 1 }; /* Converter Power Down */
+
+/*
+ * The various registers of the AD1843 use three different formats for
+ * specifying gain. The ad1843_gain structure parameterizes the
+ * formats.
+ */
+
+struct ad1843_gain {
+ int negative; /* nonzero if gain is negative. */
+ const struct ad1843_bitfield *lfield;
+ const struct ad1843_bitfield *rfield;
+ const struct ad1843_bitfield *lmute;
+ const struct ad1843_bitfield *rmute;
+};
+
+static const struct ad1843_gain ad1843_gain_RECLEV = {
+ .negative = 0,
+ .lfield = &ad1843_LIG,
+ .rfield = &ad1843_RIG
+};
+static const struct ad1843_gain ad1843_gain_LINE = {
+ .negative = 1,
+ .lfield = &ad1843_LX1M,
+ .rfield = &ad1843_RX1M,
+ .lmute = &ad1843_LX1MM,
+ .rmute = &ad1843_RX1MM
+};
+static const struct ad1843_gain ad1843_gain_LINE_2 = {
+ .negative = 1,
+ .lfield = &ad1843_LDA2G,
+ .rfield = &ad1843_RDA2G,
+ .lmute = &ad1843_LDA2GM,
+ .rmute = &ad1843_RDA2GM
+};
+static const struct ad1843_gain ad1843_gain_MIC = {
+ .negative = 1,
+ .lfield = &ad1843_LMCM,
+ .rfield = &ad1843_RMCM,
+ .lmute = &ad1843_LMCMM,
+ .rmute = &ad1843_RMCMM
+};
+static const struct ad1843_gain ad1843_gain_PCM_0 = {
+ .negative = 1,
+ .lfield = &ad1843_LDA1G,
+ .rfield = &ad1843_RDA1G,
+ .lmute = &ad1843_LDA1GM,
+ .rmute = &ad1843_RDA1GM
+};
+static const struct ad1843_gain ad1843_gain_PCM_1 = {
+ .negative = 1,
+ .lfield = &ad1843_LD2M,
+ .rfield = &ad1843_RD2M,
+ .lmute = &ad1843_LD2MM,
+ .rmute = &ad1843_RD2MM
+};
+
+static const struct ad1843_gain *ad1843_gain[AD1843_GAIN_SIZE] =
+{
+ &ad1843_gain_RECLEV,
+ &ad1843_gain_LINE,
+ &ad1843_gain_LINE_2,
+ &ad1843_gain_MIC,
+ &ad1843_gain_PCM_0,
+ &ad1843_gain_PCM_1,
+};
+
+/* read the current value of an AD1843 bitfield. */
+
+static int ad1843_read_bits(struct snd_ad1843 *ad1843,
+ const struct ad1843_bitfield *field)
+{
+ int w;
+
+ w = ad1843->read(ad1843->chip, field->reg);
+ return w >> field->lo_bit & ((1 << field->nbits) - 1);
+}
+
+/*
+ * write a new value to an AD1843 bitfield and return the old value.
+ */
+
+static int ad1843_write_bits(struct snd_ad1843 *ad1843,
+ const struct ad1843_bitfield *field,
+ int newval)
+{
+ int w, mask, oldval, newbits;
+
+ w = ad1843->read(ad1843->chip, field->reg);
+ mask = ((1 << field->nbits) - 1) << field->lo_bit;
+ oldval = (w & mask) >> field->lo_bit;
+ newbits = (newval << field->lo_bit) & mask;
+ w = (w & ~mask) | newbits;
+ ad1843->write(ad1843->chip, field->reg, w);
+
+ return oldval;
+}
+
+/*
+ * ad1843_read_multi reads multiple bitfields from the same AD1843
+ * register. It uses a single read cycle to do it. (Reading the
+ * ad1843 requires 256 bit times at 12.288 MHz, or nearly 20
+ * microseconds.)
+ *
+ * Called like this.
+ *
+ * ad1843_read_multi(ad1843, nfields,
+ * &ad1843_FIELD1, &val1,
+ * &ad1843_FIELD2, &val2, ...);
+ */
+
+static void ad1843_read_multi(struct snd_ad1843 *ad1843, int argcount, ...)
+{
+ va_list ap;
+ const struct ad1843_bitfield *fp;
+ int w = 0, mask, *value, reg = -1;
+
+ va_start(ap, argcount);
+ while (--argcount >= 0) {
+ fp = va_arg(ap, const struct ad1843_bitfield *);
+ value = va_arg(ap, int *);
+ if (reg == -1) {
+ reg = fp->reg;
+ w = ad1843->read(ad1843->chip, reg);
+ }
+
+ mask = (1 << fp->nbits) - 1;
+ *value = w >> fp->lo_bit & mask;
+ }
+ va_end(ap);
+}
+
+/*
+ * ad1843_write_multi stores multiple bitfields into the same AD1843
+ * register. It uses one read and one write cycle to do it.
+ *
+ * Called like this.
+ *
+ * ad1843_write_multi(ad1843, nfields,
+ * &ad1843_FIELD1, val1,
+ * &ad1843_FIELF2, val2, ...);
+ */
+
+static void ad1843_write_multi(struct snd_ad1843 *ad1843, int argcount, ...)
+{
+ va_list ap;
+ int reg;
+ const struct ad1843_bitfield *fp;
+ int value;
+ int w, m, mask, bits;
+
+ mask = 0;
+ bits = 0;
+ reg = -1;
+
+ va_start(ap, argcount);
+ while (--argcount >= 0) {
+ fp = va_arg(ap, const struct ad1843_bitfield *);
+ value = va_arg(ap, int);
+ if (reg == -1)
+ reg = fp->reg;
+ else
+ BUG_ON(reg != fp->reg);
+ m = ((1 << fp->nbits) - 1) << fp->lo_bit;
+ mask |= m;
+ bits |= (value << fp->lo_bit) & m;
+ }
+ va_end(ap);
+
+ if (~mask & 0xFFFF)
+ w = ad1843->read(ad1843->chip, reg);
+ else
+ w = 0;
+ w = (w & ~mask) | bits;
+ ad1843->write(ad1843->chip, reg, w);
+}
+
+int ad1843_get_gain_max(struct snd_ad1843 *ad1843, int id)
+{
+ const struct ad1843_gain *gp = ad1843_gain[id];
+ int ret;
+
+ ret = (1 << gp->lfield->nbits);
+ if (!gp->lmute)
+ ret -= 1;
+ return ret;
+}
+
+/*
+ * ad1843_get_gain reads the specified register and extracts the gain value
+ * using the supplied gain type.
+ */
+
+int ad1843_get_gain(struct snd_ad1843 *ad1843, int id)
+{
+ int lg, rg, lm, rm;
+ const struct ad1843_gain *gp = ad1843_gain[id];
+ unsigned short mask = (1 << gp->lfield->nbits) - 1;
+
+ ad1843_read_multi(ad1843, 2, gp->lfield, &lg, gp->rfield, &rg);
+ if (gp->negative) {
+ lg = mask - lg;
+ rg = mask - rg;
+ }
+ if (gp->lmute) {
+ ad1843_read_multi(ad1843, 2, gp->lmute, &lm, gp->rmute, &rm);
+ if (lm)
+ lg = 0;
+ if (rm)
+ rg = 0;
+ }
+ return lg << 0 | rg << 8;
+}
+
+/*
+ * Set an audio channel's gain.
+ *
+ * Returns the new gain, which may be lower than the old gain.
+ */
+
+int ad1843_set_gain(struct snd_ad1843 *ad1843, int id, int newval)
+{
+ const struct ad1843_gain *gp = ad1843_gain[id];
+ unsigned short mask = (1 << gp->lfield->nbits) - 1;
+
+ int lg = (newval >> 0) & mask;
+ int rg = (newval >> 8) & mask;
+ int lm = (lg == 0) ? 1 : 0;
+ int rm = (rg == 0) ? 1 : 0;
+
+ if (gp->negative) {
+ lg = mask - lg;
+ rg = mask - rg;
+ }
+ if (gp->lmute)
+ ad1843_write_multi(ad1843, 2, gp->lmute, lm, gp->rmute, rm);
+ ad1843_write_multi(ad1843, 2, gp->lfield, lg, gp->rfield, rg);
+ return ad1843_get_gain(ad1843, id);
+}
+
+/* Returns the current recording source */
+
+int ad1843_get_recsrc(struct snd_ad1843 *ad1843)
+{
+ int val = ad1843_read_bits(ad1843, &ad1843_LSS);
+
+ if (val < 0 || val > 2) {
+ val = 2;
+ ad1843_write_multi(ad1843, 2,
+ &ad1843_LSS, val, &ad1843_RSS, val);
+ }
+ return val;
+}
+
+/*
+ * Set recording source.
+ *
+ * Returns newsrc on success, -errno on failure.
+ */
+
+int ad1843_set_recsrc(struct snd_ad1843 *ad1843, int newsrc)
+{
+ if (newsrc < 0 || newsrc > 2)
+ return -EINVAL;
+
+ ad1843_write_multi(ad1843, 2, &ad1843_LSS, newsrc, &ad1843_RSS, newsrc);
+ return newsrc;
+}
+
+/* Setup ad1843 for D/A conversion. */
+
+void ad1843_setup_dac(struct snd_ad1843 *ad1843,
+ unsigned int id,
+ unsigned int framerate,
+ snd_pcm_format_t fmt,
+ unsigned int channels)
+{
+ int ad_fmt = 0, ad_mode = 0;
+
+ switch (fmt) {
+ case SNDRV_PCM_FORMAT_S8:
+ ad_fmt = 0;
+ break;
+ case SNDRV_PCM_FORMAT_U8:
+ ad_fmt = 0;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ ad_fmt = 1;
+ break;
+ case SNDRV_PCM_FORMAT_MU_LAW:
+ ad_fmt = 2;
+ break;
+ case SNDRV_PCM_FORMAT_A_LAW:
+ ad_fmt = 3;
+ break;
+ default:
+ break;
+ }
+
+ switch (channels) {
+ case 2:
+ ad_mode = 0;
+ break;
+ case 1:
+ ad_mode = 1;
+ break;
+ default:
+ break;
+ }
+
+ if (id) {
+ ad1843_write_bits(ad1843, &ad1843_C2C, framerate);
+ ad1843_write_multi(ad1843, 2,
+ &ad1843_DA2SM, ad_mode,
+ &ad1843_DA2F, ad_fmt);
+ } else {
+ ad1843_write_bits(ad1843, &ad1843_C1C, framerate);
+ ad1843_write_multi(ad1843, 2,
+ &ad1843_DA1SM, ad_mode,
+ &ad1843_DA1F, ad_fmt);
+ }
+}
+
+void ad1843_shutdown_dac(struct snd_ad1843 *ad1843, unsigned int id)
+{
+ if (id)
+ ad1843_write_bits(ad1843, &ad1843_DA2F, 1);
+ else
+ ad1843_write_bits(ad1843, &ad1843_DA1F, 1);
+}
+
+void ad1843_setup_adc(struct snd_ad1843 *ad1843,
+ unsigned int framerate,
+ snd_pcm_format_t fmt,
+ unsigned int channels)
+{
+ int da_fmt = 0;
+
+ switch (fmt) {
+ case SNDRV_PCM_FORMAT_S8: da_fmt = 0; break;
+ case SNDRV_PCM_FORMAT_U8: da_fmt = 0; break;
+ case SNDRV_PCM_FORMAT_S16_LE: da_fmt = 1; break;
+ case SNDRV_PCM_FORMAT_MU_LAW: da_fmt = 2; break;
+ case SNDRV_PCM_FORMAT_A_LAW: da_fmt = 3; break;
+ default: break;
+ }
+
+ ad1843_write_bits(ad1843, &ad1843_C3C, framerate);
+ ad1843_write_multi(ad1843, 2,
+ &ad1843_ADLF, da_fmt, &ad1843_ADRF, da_fmt);
+}
+
+void ad1843_shutdown_adc(struct snd_ad1843 *ad1843)
+{
+ /* nothing to do */
+}
+
+/*
+ * Fully initialize the ad1843. As described in the AD1843 data
+ * sheet, section "START-UP SEQUENCE". The numbered comments are
+ * subsection headings from the data sheet. See the data sheet, pages
+ * 52-54, for more info.
+ *
+ * return 0 on success, -errno on failure. */
+
+int ad1843_init(struct snd_ad1843 *ad1843)
+{
+ unsigned long later;
+
+ if (ad1843_read_bits(ad1843, &ad1843_INIT) != 0) {
+ printk(KERN_ERR "ad1843: AD1843 won't initialize\n");
+ return -EIO;
+ }
+
+ ad1843_write_bits(ad1843, &ad1843_SCF, 1);
+
+ /* 4. Put the conversion resources into standby. */
+ ad1843_write_bits(ad1843, &ad1843_PDNI, 0);
+ later = jiffies + msecs_to_jiffies(500);
+
+ while (ad1843_read_bits(ad1843, &ad1843_PDNO)) {
+ if (time_after(jiffies, later)) {
+ printk(KERN_ERR
+ "ad1843: AD1843 won't power up\n");
+ return -EIO;
+ }
+ schedule_timeout_interruptible(5);
+ }
+
+ /* 5. Power up the clock generators and enable clock output pins. */
+ ad1843_write_multi(ad1843, 3,
+ &ad1843_C1EN, 1,
+ &ad1843_C2EN, 1,
+ &ad1843_C3EN, 1);
+
+ /* 6. Configure conversion resources while they are in standby. */
+
+ /* DAC1/2 use clock 1/2 as source, ADC uses clock 3. Always. */
+ ad1843_write_multi(ad1843, 4,
+ &ad1843_DA1C, 1,
+ &ad1843_DA2C, 2,
+ &ad1843_ADLC, 3,
+ &ad1843_ADRC, 3);
+
+ /* 7. Enable conversion resources. */
+ ad1843_write_bits(ad1843, &ad1843_ADTLK, 1);
+ ad1843_write_multi(ad1843, 7,
+ &ad1843_ANAEN, 1,
+ &ad1843_AAMEN, 1,
+ &ad1843_DA1EN, 1,
+ &ad1843_DA2EN, 1,
+ &ad1843_DDMEN, 1,
+ &ad1843_ADLEN, 1,
+ &ad1843_ADREN, 1);
+
+ /* 8. Configure conversion resources while they are enabled. */
+
+ /* set gain to 0 for all channels */
+ ad1843_set_gain(ad1843, AD1843_GAIN_RECLEV, 0);
+ ad1843_set_gain(ad1843, AD1843_GAIN_LINE, 0);
+ ad1843_set_gain(ad1843, AD1843_GAIN_LINE_2, 0);
+ ad1843_set_gain(ad1843, AD1843_GAIN_MIC, 0);
+ ad1843_set_gain(ad1843, AD1843_GAIN_PCM_0, 0);
+ ad1843_set_gain(ad1843, AD1843_GAIN_PCM_1, 0);
+
+ /* Unmute all channels. */
+ /* DAC1 */
+ ad1843_write_multi(ad1843, 2, &ad1843_LDA1GM, 0, &ad1843_RDA1GM, 0);
+ /* DAC2 */
+ ad1843_write_multi(ad1843, 2, &ad1843_LDA2GM, 0, &ad1843_RDA2GM, 0);
+
+ /* Set default recording source to Line In and set
+ * mic gain to +20 dB.
+ */
+ ad1843_set_recsrc(ad1843, 2);
+ ad1843_write_multi(ad1843, 2, &ad1843_LMGE, 1, &ad1843_RMGE, 1);
+
+ /* Set Speaker Out level to +/- 4V and unmute it. */
+ ad1843_write_multi(ad1843, 3,
+ &ad1843_HPOS, 1,
+ &ad1843_HPOM, 0,
+ &ad1843_MPOM, 0);
+
+ return 0;
+}
--- /dev/null
+/*
+ * Sound driver for Silicon Graphics O2 Workstations A/V board audio.
+ *
+ * Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org>
+ * Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+ * Mxier part taken from mace_audio.c:
+ * Copyright 2007 Thorben Jändling <tj.trevelyan@gmail.com>
+ *
+ * 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/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/gfp.h>
+#include <linux/vmalloc.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <asm/ip32/ip32_ints.h>
+#include <asm/ip32/mace.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#define SNDRV_GET_ID
+#include <sound/initval.h>
+#include <sound/ad1843.h>
+
+
+MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org>");
+MODULE_DESCRIPTION("SGI O2 Audio");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Silicon Graphics, O2 Audio}}");
+
+static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
+static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
+
+module_param(index, int, 0444);
+MODULE_PARM_DESC(index, "Index value for SGI O2 soundcard.");
+module_param(id, charp, 0444);
+MODULE_PARM_DESC(id, "ID string for SGI O2 soundcard.");
+
+
+#define AUDIO_CONTROL_RESET BIT(0) /* 1: reset audio interface */
+#define AUDIO_CONTROL_CODEC_PRESENT BIT(1) /* 1: codec detected */
+
+#define CODEC_CONTROL_WORD_SHIFT 0
+#define CODEC_CONTROL_READ BIT(16)
+#define CODEC_CONTROL_ADDRESS_SHIFT 17
+
+#define CHANNEL_CONTROL_RESET BIT(10) /* 1: reset channel */
+#define CHANNEL_DMA_ENABLE BIT(9) /* 1: enable DMA transfer */
+#define CHANNEL_INT_THRESHOLD_DISABLED (0 << 5) /* interrupt disabled */
+#define CHANNEL_INT_THRESHOLD_25 (1 << 5) /* int on buffer >25% full */
+#define CHANNEL_INT_THRESHOLD_50 (2 << 5) /* int on buffer >50% full */
+#define CHANNEL_INT_THRESHOLD_75 (3 << 5) /* int on buffer >75% full */
+#define CHANNEL_INT_THRESHOLD_EMPTY (4 << 5) /* int on buffer empty */
+#define CHANNEL_INT_THRESHOLD_NOT_EMPTY (5 << 5) /* int on buffer !empty */
+#define CHANNEL_INT_THRESHOLD_FULL (6 << 5) /* int on buffer empty */
+#define CHANNEL_INT_THRESHOLD_NOT_FULL (7 << 5) /* int on buffer !empty */
+
+#define CHANNEL_RING_SHIFT 12
+#define CHANNEL_RING_SIZE (1 << CHANNEL_RING_SHIFT)
+#define CHANNEL_RING_MASK (CHANNEL_RING_SIZE - 1)
+
+#define CHANNEL_LEFT_SHIFT 40
+#define CHANNEL_RIGHT_SHIFT 8
+
+struct snd_sgio2audio_chan {
+ int idx;
+ struct snd_pcm_substream *substream;
+ int pos;
+ snd_pcm_uframes_t size;
+ spinlock_t lock;
+};
+
+/* definition of the chip-specific record */
+struct snd_sgio2audio {
+ struct snd_card *card;
+
+ /* codec */
+ struct snd_ad1843 ad1843;
+ spinlock_t ad1843_lock;
+
+ /* channels */
+ struct snd_sgio2audio_chan channel[3];
+
+ /* resources */
+ void *ring_base;
+ dma_addr_t ring_base_dma;
+};
+
+/* AD1843 access */
+
+/*
+ * read_ad1843_reg returns the current contents of a 16 bit AD1843 register.
+ *
+ * Returns unsigned register value on success, -errno on failure.
+ */
+static int read_ad1843_reg(void *priv, int reg)
+{
+ struct snd_sgio2audio *chip = priv;
+ int val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->ad1843_lock, flags);
+
+ writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
+ CODEC_CONTROL_READ, &mace->perif.audio.codec_control);
+ wmb();
+ val = readq(&mace->perif.audio.codec_control); /* flush bus */
+ udelay(200);
+
+ val = readq(&mace->perif.audio.codec_read);
+
+ spin_unlock_irqrestore(&chip->ad1843_lock, flags);
+ return val;
+}
+
+/*
+ * write_ad1843_reg writes the specified value to a 16 bit AD1843 register.
+ */
+static int write_ad1843_reg(void *priv, int reg, int word)
+{
+ struct snd_sgio2audio *chip = priv;
+ int val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->ad1843_lock, flags);
+
+ writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
+ (word << CODEC_CONTROL_WORD_SHIFT),
+ &mace->perif.audio.codec_control);
+ wmb();
+ val = readq(&mace->perif.audio.codec_control); /* flush bus */
+ udelay(200);
+
+ spin_unlock_irqrestore(&chip->ad1843_lock, flags);
+ return 0;
+}
+
+static int sgio2audio_gain_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 2;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = ad1843_get_gain_max(&chip->ad1843,
+ (int)kcontrol->private_value);
+ return 0;
+}
+
+static int sgio2audio_gain_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
+ int vol;
+
+ vol = ad1843_get_gain(&chip->ad1843, (int)kcontrol->private_value);
+
+ ucontrol->value.integer.value[0] = (vol >> 8) & 0xFF;
+ ucontrol->value.integer.value[1] = vol & 0xFF;
+
+ return 0;
+}
+
+static int sgio2audio_gain_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
+ int newvol, oldvol;
+
+ oldvol = ad1843_get_gain(&chip->ad1843, kcontrol->private_value);
+ newvol = (ucontrol->value.integer.value[0] << 8) |
+ ucontrol->value.integer.value[1];
+
+ newvol = ad1843_set_gain(&chip->ad1843, kcontrol->private_value,
+ newvol);
+
+ return newvol != oldvol;
+}
+
+static int sgio2audio_source_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ static const char *texts[3] = {
+ "Cam Mic", "Mic", "Line"
+ };
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+ uinfo->count = 1;
+ uinfo->value.enumerated.items = 3;
+ if (uinfo->value.enumerated.item >= 3)
+ uinfo->value.enumerated.item = 1;
+ strcpy(uinfo->value.enumerated.name,
+ texts[uinfo->value.enumerated.item]);
+ return 0;
+}
+
+static int sgio2audio_source_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
+
+ ucontrol->value.enumerated.item[0] = ad1843_get_recsrc(&chip->ad1843);
+ return 0;
+}
+
+static int sgio2audio_source_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
+ int newsrc, oldsrc;
+
+ oldsrc = ad1843_get_recsrc(&chip->ad1843);
+ newsrc = ad1843_set_recsrc(&chip->ad1843,
+ ucontrol->value.enumerated.item[0]);
+
+ return newsrc != oldsrc;
+}
+
+/* dac1/pcm0 mixer control */
+static struct snd_kcontrol_new sgio2audio_ctrl_pcm0 __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Volume",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = AD1843_GAIN_PCM_0,
+ .info = sgio2audio_gain_info,
+ .get = sgio2audio_gain_get,
+ .put = sgio2audio_gain_put,
+};
+
+/* dac2/pcm1 mixer control */
+static struct snd_kcontrol_new sgio2audio_ctrl_pcm1 __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Volume",
+ .index = 1,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = AD1843_GAIN_PCM_1,
+ .info = sgio2audio_gain_info,
+ .get = sgio2audio_gain_get,
+ .put = sgio2audio_gain_put,
+};
+
+/* record level mixer control */
+static struct snd_kcontrol_new sgio2audio_ctrl_reclevel __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Capture Volume",
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = AD1843_GAIN_RECLEV,
+ .info = sgio2audio_gain_info,
+ .get = sgio2audio_gain_get,
+ .put = sgio2audio_gain_put,
+};
+
+/* record level source control */
+static struct snd_kcontrol_new sgio2audio_ctrl_recsource __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Capture Source",
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .info = sgio2audio_source_info,
+ .get = sgio2audio_source_get,
+ .put = sgio2audio_source_put,
+};
+
+/* line mixer control */
+static struct snd_kcontrol_new sgio2audio_ctrl_line __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Line Playback Volume",
+ .index = 0,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = AD1843_GAIN_LINE,
+ .info = sgio2audio_gain_info,
+ .get = sgio2audio_gain_get,
+ .put = sgio2audio_gain_put,
+};
+
+/* cd mixer control */
+static struct snd_kcontrol_new sgio2audio_ctrl_cd __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Line Playback Volume",
+ .index = 1,
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = AD1843_GAIN_LINE_2,
+ .info = sgio2audio_gain_info,
+ .get = sgio2audio_gain_get,
+ .put = sgio2audio_gain_put,
+};
+
+/* mic mixer control */
+static struct snd_kcontrol_new sgio2audio_ctrl_mic __devinitdata = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Mic Playback Volume",
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .private_value = AD1843_GAIN_MIC,
+ .info = sgio2audio_gain_info,
+ .get = sgio2audio_gain_get,
+ .put = sgio2audio_gain_put,
+};
+
+
+static int __devinit snd_sgio2audio_new_mixer(struct snd_sgio2audio *chip)
+{
+ int err;
+
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_pcm0, chip));
+ if (err < 0)
+ return err;
+
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_pcm1, chip));
+ if (err < 0)
+ return err;
+
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_reclevel, chip));
+ if (err < 0)
+ return err;
+
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_recsource, chip));
+ if (err < 0)
+ return err;
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_line, chip));
+ if (err < 0)
+ return err;
+
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_cd, chip));
+ if (err < 0)
+ return err;
+
+ err = snd_ctl_add(chip->card,
+ snd_ctl_new1(&sgio2audio_ctrl_mic, chip));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+/* low-level audio interface DMA */
+
+/* get data out of bounce buffer, count must be a multiple of 32 */
+/* returns 1 if a period has elapsed */
+static int snd_sgio2audio_dma_pull_frag(struct snd_sgio2audio *chip,
+ unsigned int ch, unsigned int count)
+{
+ int ret;
+ unsigned long src_base, src_pos, dst_mask;
+ unsigned char *dst_base;
+ int dst_pos;
+ u64 *src;
+ s16 *dst;
+ u64 x;
+ unsigned long flags;
+ struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
+
+ spin_lock_irqsave(&chip->channel[ch].lock, flags);
+
+ src_base = (unsigned long) chip->ring_base | (ch << CHANNEL_RING_SHIFT);
+ src_pos = readq(&mace->perif.audio.chan[ch].read_ptr);
+ dst_base = runtime->dma_area;
+ dst_pos = chip->channel[ch].pos;
+ dst_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
+
+ /* check if a period has elapsed */
+ chip->channel[ch].size += (count >> 3); /* in frames */
+ ret = chip->channel[ch].size >= runtime->period_size;
+ chip->channel[ch].size %= runtime->period_size;
+
+ while (count) {
+ src = (u64 *)(src_base + src_pos);
+ dst = (s16 *)(dst_base + dst_pos);
+
+ x = *src;
+ dst[0] = (x >> CHANNEL_LEFT_SHIFT) & 0xffff;
+ dst[1] = (x >> CHANNEL_RIGHT_SHIFT) & 0xffff;
+
+ src_pos = (src_pos + sizeof(u64)) & CHANNEL_RING_MASK;
+ dst_pos = (dst_pos + 2 * sizeof(s16)) & dst_mask;
+ count -= sizeof(u64);
+ }
+
+ writeq(src_pos, &mace->perif.audio.chan[ch].read_ptr); /* in bytes */
+ chip->channel[ch].pos = dst_pos;
+
+ spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
+ return ret;
+}
+
+/* put some DMA data in bounce buffer, count must be a multiple of 32 */
+/* returns 1 if a period has elapsed */
+static int snd_sgio2audio_dma_push_frag(struct snd_sgio2audio *chip,
+ unsigned int ch, unsigned int count)
+{
+ int ret;
+ s64 l, r;
+ unsigned long dst_base, dst_pos, src_mask;
+ unsigned char *src_base;
+ int src_pos;
+ u64 *dst;
+ s16 *src;
+ unsigned long flags;
+ struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
+
+ spin_lock_irqsave(&chip->channel[ch].lock, flags);
+
+ dst_base = (unsigned long)chip->ring_base | (ch << CHANNEL_RING_SHIFT);
+ dst_pos = readq(&mace->perif.audio.chan[ch].write_ptr);
+ src_base = runtime->dma_area;
+ src_pos = chip->channel[ch].pos;
+ src_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
+
+ /* check if a period has elapsed */
+ chip->channel[ch].size += (count >> 3); /* in frames */
+ ret = chip->channel[ch].size >= runtime->period_size;
+ chip->channel[ch].size %= runtime->period_size;
+
+ while (count) {
+ src = (s16 *)(src_base + src_pos);
+ dst = (u64 *)(dst_base + dst_pos);
+
+ l = src[0]; /* sign extend */
+ r = src[1]; /* sign extend */
+
+ *dst = ((l & 0x00ffffff) << CHANNEL_LEFT_SHIFT) |
+ ((r & 0x00ffffff) << CHANNEL_RIGHT_SHIFT);
+
+ dst_pos = (dst_pos + sizeof(u64)) & CHANNEL_RING_MASK;
+ src_pos = (src_pos + 2 * sizeof(s16)) & src_mask;
+ count -= sizeof(u64);
+ }
+
+ writeq(dst_pos, &mace->perif.audio.chan[ch].write_ptr); /* in bytes */
+ chip->channel[ch].pos = src_pos;
+
+ spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
+ return ret;
+}
+
+static int snd_sgio2audio_dma_start(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
+ struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
+ int ch = chan->idx;
+
+ /* reset DMA channel */
+ writeq(CHANNEL_CONTROL_RESET, &mace->perif.audio.chan[ch].control);
+ udelay(10);
+ writeq(0, &mace->perif.audio.chan[ch].control);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* push a full buffer */
+ snd_sgio2audio_dma_push_frag(chip, ch, CHANNEL_RING_SIZE - 32);
+ }
+ /* set DMA to wake on 50% empty and enable interrupt */
+ writeq(CHANNEL_DMA_ENABLE | CHANNEL_INT_THRESHOLD_50,
+ &mace->perif.audio.chan[ch].control);
+ return 0;
+}
+
+static int snd_sgio2audio_dma_stop(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
+
+ writeq(0, &mace->perif.audio.chan[chan->idx].control);
+ return 0;
+}
+
+static irqreturn_t snd_sgio2audio_dma_in_isr(int irq, void *dev_id)
+{
+ struct snd_sgio2audio_chan *chan = dev_id;
+ struct snd_pcm_substream *substream;
+ struct snd_sgio2audio *chip;
+ int count, ch;
+
+ substream = chan->substream;
+ chip = snd_pcm_substream_chip(substream);
+ ch = chan->idx;
+
+ /* empty the ring */
+ count = CHANNEL_RING_SIZE -
+ readq(&mace->perif.audio.chan[ch].depth) - 32;
+ if (snd_sgio2audio_dma_pull_frag(chip, ch, count))
+ snd_pcm_period_elapsed(substream);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t snd_sgio2audio_dma_out_isr(int irq, void *dev_id)
+{
+ struct snd_sgio2audio_chan *chan = dev_id;
+ struct snd_pcm_substream *substream;
+ struct snd_sgio2audio *chip;
+ int count, ch;
+
+ substream = chan->substream;
+ chip = snd_pcm_substream_chip(substream);
+ ch = chan->idx;
+ /* fill the ring */
+ count = CHANNEL_RING_SIZE -
+ readq(&mace->perif.audio.chan[ch].depth) - 32;
+ if (snd_sgio2audio_dma_push_frag(chip, ch, count))
+ snd_pcm_period_elapsed(substream);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id)
+{
+ struct snd_sgio2audio_chan *chan = dev_id;
+ struct snd_pcm_substream *substream;
+
+ substream = chan->substream;
+ snd_sgio2audio_dma_stop(substream);
+ snd_sgio2audio_dma_start(substream);
+ return IRQ_HANDLED;
+}
+
+/* PCM part */
+/* PCM hardware definition */
+static struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER),
+ .formats = SNDRV_PCM_FMTBIT_S16_BE,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 65536,
+ .period_bytes_min = 32768,
+ .period_bytes_max = 65536,
+ .periods_min = 1,
+ .periods_max = 1024,
+};
+
+/* PCM playback open callback */
+static int snd_sgio2audio_playback1_open(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->hw = snd_sgio2audio_pcm_hw;
+ runtime->private_data = &chip->channel[1];
+ return 0;
+}
+
+static int snd_sgio2audio_playback2_open(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->hw = snd_sgio2audio_pcm_hw;
+ runtime->private_data = &chip->channel[2];
+ return 0;
+}
+
+/* PCM capture open callback */
+static int snd_sgio2audio_capture_open(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->hw = snd_sgio2audio_pcm_hw;
+ runtime->private_data = &chip->channel[0];
+ return 0;
+}
+
+/* PCM close callback */
+static int snd_sgio2audio_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->private_data = NULL;
+ return 0;
+}
+
+
+/* hw_params callback */
+static int snd_sgio2audio_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int size = params_buffer_bytes(hw_params);
+
+ /* alloc virtual 'dma' area */
+ if (runtime->dma_area)
+ vfree(runtime->dma_area);
+ runtime->dma_area = vmalloc(size);
+ if (runtime->dma_area == NULL)
+ return -ENOMEM;
+ runtime->dma_bytes = size;
+ return 0;
+}
+
+/* hw_free callback */
+static int snd_sgio2audio_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ if (substream->runtime->dma_area)
+ vfree(substream->runtime->dma_area);
+ substream->runtime->dma_area = NULL;
+ return 0;
+}
+
+/* prepare callback */
+static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
+ int ch = chan->idx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&chip->channel[ch].lock, flags);
+
+ /* Setup the pseudo-dma transfer pointers. */
+ chip->channel[ch].pos = 0;
+ chip->channel[ch].size = 0;
+ chip->channel[ch].substream = substream;
+
+ /* set AD1843 format */
+ /* hardware format is always S16_LE */
+ switch (substream->stream) {
+ case SNDRV_PCM_STREAM_PLAYBACK:
+ ad1843_setup_dac(&chip->ad1843,
+ ch - 1,
+ runtime->rate,
+ SNDRV_PCM_FORMAT_S16_LE,
+ runtime->channels);
+ break;
+ case SNDRV_PCM_STREAM_CAPTURE:
+ ad1843_setup_adc(&chip->ad1843,
+ runtime->rate,
+ SNDRV_PCM_FORMAT_S16_LE,
+ runtime->channels);
+ break;
+ }
+ spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
+ return 0;
+}
+
+/* trigger callback */
+static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ /* start the PCM engine */
+ snd_sgio2audio_dma_start(substream);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ /* stop the PCM engine */
+ snd_sgio2audio_dma_stop(substream);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* pointer callback */
+static snd_pcm_uframes_t
+snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
+ struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
+
+ /* get the current hardware pointer */
+ return bytes_to_frames(substream->runtime,
+ chip->channel[chan->idx].pos);
+}
+
+/* get the physical page pointer on the given offset */
+static struct page *snd_sgio2audio_page(struct snd_pcm_substream *substream,
+ unsigned long offset)
+{
+ return vmalloc_to_page(substream->runtime->dma_area + offset);
+}
+
+/* operators */
+static struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
+ .open = snd_sgio2audio_playback1_open,
+ .close = snd_sgio2audio_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_sgio2audio_pcm_hw_params,
+ .hw_free = snd_sgio2audio_pcm_hw_free,
+ .prepare = snd_sgio2audio_pcm_prepare,
+ .trigger = snd_sgio2audio_pcm_trigger,
+ .pointer = snd_sgio2audio_pcm_pointer,
+ .page = snd_sgio2audio_page,
+};
+
+static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
+ .open = snd_sgio2audio_playback2_open,
+ .close = snd_sgio2audio_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_sgio2audio_pcm_hw_params,
+ .hw_free = snd_sgio2audio_pcm_hw_free,
+ .prepare = snd_sgio2audio_pcm_prepare,
+ .trigger = snd_sgio2audio_pcm_trigger,
+ .pointer = snd_sgio2audio_pcm_pointer,
+ .page = snd_sgio2audio_page,
+};
+
+static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
+ .open = snd_sgio2audio_capture_open,
+ .close = snd_sgio2audio_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_sgio2audio_pcm_hw_params,
+ .hw_free = snd_sgio2audio_pcm_hw_free,
+ .prepare = snd_sgio2audio_pcm_prepare,
+ .trigger = snd_sgio2audio_pcm_trigger,
+ .pointer = snd_sgio2audio_pcm_pointer,
+ .page = snd_sgio2audio_page,
+};
+
+/*
+ * definitions of capture are omitted here...
+ */
+
+/* create a pcm device */
+static int __devinit snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip)
+{
+ struct snd_pcm *pcm;
+ int err;
+
+ /* create first pcm device with one outputs and one input */
+ err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm);
+ if (err < 0)
+ return err;
+
+ pcm->private_data = chip;
+ strcpy(pcm->name, "SGI O2 DAC1");
+
+ /* set operators */
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_sgio2audio_playback1_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_sgio2audio_capture_ops);
+
+ /* create second pcm device with one outputs and no input */
+ err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm);
+ if (err < 0)
+ return err;
+
+ pcm->private_data = chip;
+ strcpy(pcm->name, "SGI O2 DAC2");
+
+ /* set operators */
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_sgio2audio_playback2_ops);
+
+ return 0;
+}
+
+static struct {
+ int idx;
+ int irq;
+ irqreturn_t (*isr)(int, void *);
+ const char *desc;
+} snd_sgio2_isr_table[] = {
+ {
+ .idx = 0,
+ .irq = MACEISA_AUDIO1_DMAT_IRQ,
+ .isr = snd_sgio2audio_dma_in_isr,
+ .desc = "Capture DMA Channel 0"
+ }, {
+ .idx = 0,
+ .irq = MACEISA_AUDIO1_OF_IRQ,
+ .isr = snd_sgio2audio_error_isr,
+ .desc = "Capture Overflow"
+ }, {
+ .idx = 1,
+ .irq = MACEISA_AUDIO2_DMAT_IRQ,
+ .isr = snd_sgio2audio_dma_out_isr,
+ .desc = "Playback DMA Channel 1"
+ }, {
+ .idx = 1,
+ .irq = MACEISA_AUDIO2_MERR_IRQ,
+ .isr = snd_sgio2audio_error_isr,
+ .desc = "Memory Error Channel 1"
+ }, {
+ .idx = 2,
+ .irq = MACEISA_AUDIO3_DMAT_IRQ,
+ .isr = snd_sgio2audio_dma_out_isr,
+ .desc = "Playback DMA Channel 2"
+ }, {
+ .idx = 2,
+ .irq = MACEISA_AUDIO3_MERR_IRQ,
+ .isr = snd_sgio2audio_error_isr,
+ .desc = "Memory Error Channel 2"
+ }
+};
+
+/* ALSA driver */
+
+static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
+{
+ int i;
+
+ /* reset interface */
+ writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
+ udelay(1);
+ writeq(0, &mace->perif.audio.control);
+
+ /* release IRQ's */
+ for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)
+ free_irq(snd_sgio2_isr_table[i].irq,
+ &chip->channel[snd_sgio2_isr_table[i].idx]);
+
+ dma_free_coherent(NULL, MACEISA_RINGBUFFERS_SIZE,
+ chip->ring_base, chip->ring_base_dma);
+
+ /* release card data */
+ kfree(chip);
+ return 0;
+}
+
+static int snd_sgio2audio_dev_free(struct snd_device *device)
+{
+ struct snd_sgio2audio *chip = device->device_data;
+
+ return snd_sgio2audio_free(chip);
+}
+
+static struct snd_device_ops ops = {
+ .dev_free = snd_sgio2audio_dev_free,
+};
+
+static int __devinit snd_sgio2audio_create(struct snd_card *card,
+ struct snd_sgio2audio **rchip)
+{
+ struct snd_sgio2audio *chip;
+ int i, err;
+
+ *rchip = NULL;
+
+ /* check if a codec is attached to the interface */
+ /* (Audio or Audio/Video board present) */
+ if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT))
+ return -ENOENT;
+
+ chip = kzalloc(sizeof(struct snd_sgio2audio), GFP_KERNEL);
+ if (chip == NULL)
+ return -ENOMEM;
+
+ chip->card = card;
+
+ chip->ring_base = dma_alloc_coherent(NULL, MACEISA_RINGBUFFERS_SIZE,
+ &chip->ring_base_dma, GFP_USER);
+ if (chip->ring_base == NULL) {
+ printk(KERN_ERR
+ "sgio2audio: could not allocate ring buffers\n");
+ kfree(chip);
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&chip->ad1843_lock);
+
+ /* initialize channels */
+ for (i = 0; i < 3; i++) {
+ spin_lock_init(&chip->channel[i].lock);
+ chip->channel[i].idx = i;
+ }
+
+ /* allocate IRQs */
+ for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) {
+ if (request_irq(snd_sgio2_isr_table[i].irq,
+ snd_sgio2_isr_table[i].isr,
+ 0,
+ snd_sgio2_isr_table[i].desc,
+ &chip->channel[snd_sgio2_isr_table[i].idx])) {
+ snd_sgio2audio_free(chip);
+ printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",
+ snd_sgio2_isr_table[i].irq);
+ return -EBUSY;
+ }
+ }
+
+ /* reset the interface */
+ writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
+ udelay(1);
+ writeq(0, &mace->perif.audio.control);
+ msleep_interruptible(1); /* give time to recover */
+
+ /* set ring base */
+ writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase);
+
+ /* attach the AD1843 codec */
+ chip->ad1843.read = read_ad1843_reg;
+ chip->ad1843.write = write_ad1843_reg;
+ chip->ad1843.chip = chip;
+
+ /* initialize the AD1843 codec */
+ err = ad1843_init(&chip->ad1843);
+ if (err < 0) {
+ snd_sgio2audio_free(chip);
+ return err;
+ }
+
+ err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+ if (err < 0) {
+ snd_sgio2audio_free(chip);
+ return err;
+ }
+ *rchip = chip;
+ return 0;
+}
+
+static int __devinit snd_sgio2audio_probe(struct platform_device *pdev)
+{
+ struct snd_card *card;
+ struct snd_sgio2audio *chip;
+ int err;
+
+ card = snd_card_new(index, id, THIS_MODULE, 0);
+ if (card == NULL)
+ return -ENOMEM;
+
+ err = snd_sgio2audio_create(card, &chip);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+ snd_card_set_dev(card, &pdev->dev);
+
+ err = snd_sgio2audio_new_pcm(chip);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+ err = snd_sgio2audio_new_mixer(chip);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+
+ strcpy(card->driver, "SGI O2 Audio");
+ strcpy(card->shortname, "SGI O2 Audio");
+ sprintf(card->longname, "%s irq %i-%i",
+ card->shortname,
+ MACEISA_AUDIO1_DMAT_IRQ,
+ MACEISA_AUDIO3_MERR_IRQ);
+
+ err = snd_card_register(card);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+ platform_set_drvdata(pdev, card);
+ return 0;
+}
+
+static int __exit snd_sgio2audio_remove(struct platform_device *pdev)
+{
+ struct snd_card *card = platform_get_drvdata(pdev);
+
+ snd_card_free(card);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct platform_driver sgio2audio_driver = {
+ .probe = snd_sgio2audio_probe,
+ .remove = __devexit_p(snd_sgio2audio_remove),
+ .driver = {
+ .name = "sgio2audio",
+ .owner = THIS_MODULE,
+ }
+};
+
+static int __init alsa_card_sgio2audio_init(void)
+{
+ return platform_driver_register(&sgio2audio_driver);
+}
+
+static void __exit alsa_card_sgio2audio_exit(void)
+{
+ platform_driver_unregister(&sgio2audio_driver);
+}
+
+module_init(alsa_card_sgio2audio_init)
+module_exit(alsa_card_sgio2audio_exit)
projects / openwrt / staging / blogic.git / commitdiff