[ALSA] hdspm - Support for Master mode of AES32 and recent MADI

The current MADI driver was found not to completely work, at least on recent
MADI cards (rev 204), in particular at 96kHz. This patch solves this:
  * Add support of DDS feature
  * Channel map fixed
  * Channel/rate rules fixed
  * DMA allocation fixed (need to alloc for all channels and not only for the
    used ones)
Full support for AES32 master mode was added:
  * Add support of DDS feature
  * Channel map fixed
  * Channel/rate rules fixed
Signed-off-by: NRemy Bruno <remy.bruno@trinnov.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/pci/rme9652/hdspm.c

@@ -91,8 +91,10 @@ MODULE_SUPPORTED_DEVICE("{{RME HDSPM-MADI}}");
 #define HDSPM_controlRegister	     64
 #define HDSPM_interruptConfirmation  96
 #define HDSPM_control2Reg	     256  /* not in specs ???????? */
+#define HDSPM_freqReg                256  /* for AES32 */
 #define HDSPM_midiDataOut0  	     352  /* just believe in old code */
 #define HDSPM_midiDataOut1  	     356
+#define HDSPM_eeprom_wr		     384  /* for AES32 */
 
 /* DMA enable for 64 channels, only Bit 0 is relevant */
 #define HDSPM_outputEnableBase       512  /* 512-767  input  DMA */ 
@@ -389,9 +391,8 @@ MODULE_SUPPORTED_DEVICE("{{RME HDSPM-MADI}}");
    size is the same regardless of the number of channels, and
    also the latency to use. 
    for one direction !!!
-   => need to mupltiply by 2!!
 */
-#define HDSPM_DMA_AREA_BYTES (2 * HDSPM_MAX_CHANNELS * HDSPM_CHANNEL_BUFFER_BYTES)
+#define HDSPM_DMA_AREA_BYTES (HDSPM_MAX_CHANNELS * HDSPM_CHANNEL_BUFFER_BYTES)
 #define HDSPM_DMA_AREA_KILOBYTES (HDSPM_DMA_AREA_BYTES/1024)
 
 /* revisions >= 230 indicate AES32 card */
@@ -484,28 +485,6 @@ static char channel_map_madi_ss[HDSPM_MAX_CHANNELS] = {
    56, 57, 58, 59, 60, 61, 62, 63
 };
 
-static char channel_map_madi_ds[HDSPM_MAX_CHANNELS] = {
-  0, 2, 4, 6, 8, 10, 12, 14,
-  16, 18, 20, 22, 24, 26, 28, 30,
-  32, 34, 36, 38, 40, 42, 44, 46,
-  48, 50, 52, 54, 56, 58, 60, 62,
-  -1, -1, -1, -1, -1, -1, -1, -1,
-  -1, -1, -1, -1, -1, -1, -1, -1,
-  -1, -1, -1, -1, -1, -1, -1, -1,
-  -1, -1, -1, -1, -1, -1, -1, -1
-};
-
-static char channel_map_madi_qs[HDSPM_MAX_CHANNELS] = {
-  0,   4,  8, 12, 16, 20, 24,  28,  
-  32, 36, 40, 44, 48, 52, 56,  60
-  -1, -1, -1, -1, -1, -1, -1, -1,  
-  -1, -1, -1, -1, -1, -1, -1, -1,  
-  -1, -1, -1, -1, -1, -1, -1, -1, 
-  -1, -1, -1, -1, -1, -1, -1, -1, 
-  -1, -1, -1, -1, -1, -1, -1, -1, 
-  -1, -1, -1, -1, -1, -1, -1, -1
-};
-
 
 static struct pci_device_id snd_hdspm_ids[] __devinitdata = {
 	{
@@ -818,6 +797,27 @@ static int hdspm_set_interrupt_interval(struct hdspm * s, unsigned int frames)
 	return 0;
 }
 
+static void hdspm_set_dds_value(struct hdspm *hdspm, int rate)
+{
+	u64 n;
+	u32 r;
+	
+	if (rate >= 112000)
+		rate /= 4;
+	else if (rate >= 56000)
+		rate /= 2;
+
+	/* RME says n = 104857600000000, but in the windows MADI driver, I see:
+//	return 104857600000000 / rate; // 100 MHz
+	return 110100480000000 / rate; // 105 MHz
+        */	   
+	//n = 104857600000000ULL;  /*  =  2^20 * 10^8 */
+	n = 110100480000000ULL;    /* Value checked for AES32 and MADI */
+	div64_32(&n, rate, &r);
+	/* n should be less than 2^32 for being written to FREQ register */
+	snd_assert((n >> 32) == 0);
+	hdspm_write(hdspm, HDSPM_freqReg, (u32)n);
+}
 
 /* dummy set rate lets see what happens */
 static int hdspm_set_rate(struct hdspm * hdspm, int rate, int called_internally)
@@ -943,11 +943,15 @@ static int hdspm_set_rate(struct hdspm * hdspm, int rate, int called_internally)
 	hdspm->control_register |= rate_bits;
 	hdspm_write(hdspm, HDSPM_controlRegister, hdspm->control_register);
 
-	if (rate > 96000 /* 64000*/)
-		hdspm->channel_map = channel_map_madi_qs;
-	else if (rate > 48000)
-		hdspm->channel_map = channel_map_madi_ds;
-	else 
+	/* For AES32, need to set DDS value in FREQ register
+	   For MADI, also apparently */
+	hdspm_set_dds_value(hdspm, rate);
+	
+	if (hdspm->is_aes32 && rate != current_rate)
+		hdspm_write(hdspm, HDSPM_eeprom_wr, 0);
+	
+	/* For AES32 and for MADI (at least rev 204), channel_map needs to
+	 * always be channel_map_madi_ss, whatever the sample rate */
 	hdspm->channel_map = channel_map_madi_ss;
 
 	hdspm->system_sample_rate = rate;
@@ -3184,8 +3188,8 @@ snd_hdspm_proc_read_aes32(struct snd_info_entry * entry,
 		    hdspm_read(hdspm, HDSPM_midiStatusIn0) & 0xFF,
 		    hdspm_read(hdspm, HDSPM_midiStatusIn1) & 0xFF);
 	snd_iprintf(buffer,
-		    "Register: ctrl1=0x%x, ctrl2=0x%x, status1=0x%x, status2=0x%x, timecode=0x%x\n",
-		    hdspm->control_register, hdspm->control2_register,
+		    "Register: ctrl1=0x%x, status1=0x%x, status2=0x%x, timecode=0x%x\n",
+		    hdspm->control_register,
 		    status, status2, timecode);
 
 	snd_iprintf(buffer, "--- Settings ---\n");
@@ -3377,6 +3381,8 @@ static int snd_hdspm_set_defaults(struct hdspm * hdspm)
 
 	hdspm_write(hdspm, HDSPM_controlRegister, hdspm->control_register);
 
+        if (!hdspm->is_aes32) {
+		/* No control2 register for AES32 */
 #ifdef SNDRV_BIG_ENDIAN
 		hdspm->control2_register = HDSPM_BIGENDIAN_MODE;
 #else
@@ -3384,6 +3390,7 @@ static int snd_hdspm_set_defaults(struct hdspm * hdspm)
 #endif
 
 		hdspm_write(hdspm, HDSPM_control2Reg, hdspm->control2_register);
+	}
 	hdspm_compute_period_size(hdspm);
 
 	/* silence everything */
@@ -3656,11 +3663,10 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 
 	/* Memory allocation, takashi's method, dont know if we should spinlock  */
 	/* malloc all buffer even if not enabled to get sure */
-	/* malloc only needed bytes */
+	/* Update for MADI rev 204: we need to allocate for all channels,
+	 * otherwise it doesn't work at 96kHz */
 	err =
-	    snd_pcm_lib_malloc_pages(substream,
-				     HDSPM_CHANNEL_BUFFER_BYTES *
-				     params_channels(params));
+	    snd_pcm_lib_malloc_pages(substream, HDSPM_DMA_AREA_BYTES);
 	if (err < 0)
 		return err;
 
@@ -3696,6 +3702,13 @@ static int snd_hdspm_hw_params(struct snd_pcm_substream *substream,
 	   "playback" : "capture",
 	   snd_pcm_sgbuf_get_addr(sgbuf, 0));
 	 */
+	/*
+	snd_printdd("set_hwparams: %s %d Hz, %d channels, bs = %d\n",
+			substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
+			  "playback" : "capture",
+			params_rate(params), params_channels(params),
+			params_buffer_size(params));
+	*/
 	return 0;
 }
 
@@ -3900,16 +3913,16 @@ static int snd_hdspm_hw_rule_channels_rate(struct snd_pcm_hw_params *params,
 	struct snd_interval *r =
 	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 
-	if (r->min > 48000) {
+	if (r->min > 48000 && r->max <= 96000) {
 		struct snd_interval t = {
-			.min = 1,
+			.min = hdspm->ds_channels,
 			.max = hdspm->ds_channels,
 			.integer = 1,
 		};
 		return snd_interval_refine(c, &t);
 	} else if (r->max < 64000) {
 		struct snd_interval t = {
-			.min = 1,
+			.min = hdspm->ss_channels,
 			.max = hdspm->ss_channels,
 			.integer = 1,
 		};
@@ -3927,14 +3940,14 @@ static int snd_hdspm_hw_rule_rate_channels(struct snd_pcm_hw_params *params,
 	struct snd_interval *r =
 	    hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 
-	if (c->min <= hdspm->ss_channels) {
+	if (c->min >= hdspm->ss_channels) {
 		struct snd_interval t = {
 			.min = 32000,
 			.max = 48000,
 			.integer = 1,
 		};
 		return snd_interval_refine(r, &t);
-	} else if (c->max > hdspm->ss_channels) {
+	} else if (c->max <= hdspm->ds_channels) {
 		struct snd_interval t = {
 			.min = 64000,
 			.max = 96000,
@@ -3946,13 +3959,39 @@ static int snd_hdspm_hw_rule_rate_channels(struct snd_pcm_hw_params *params,
 	return 0;
 }
 
+static int snd_hdspm_hw_rule_channels(struct snd_pcm_hw_params *params,
+				      struct snd_pcm_hw_rule *rule)
+{
+	unsigned int list[3];
+	struct hdspm *hdspm = rule->private;
+	struct snd_interval *c = hw_param_interval(params,
+			SNDRV_PCM_HW_PARAM_CHANNELS);
+	if (hdspm->is_aes32) {
+		list[0] = hdspm->qs_channels;
+		list[1] = hdspm->ds_channels;
+		list[2] = hdspm->ss_channels;
+		return snd_interval_list(c, 3, list, 0);
+	} else {
+		list[0] = hdspm->ds_channels;
+		list[1] = hdspm->ss_channels;
+		return snd_interval_list(c, 2, list, 0);
+	}
+}
+
+
+static unsigned int hdspm_aes32_sample_rates[] = { 32000, 44100, 48000, 64000, 88200, 96000, 128000, 176400, 192000 };
+
+static struct snd_pcm_hw_constraint_list hdspm_hw_constraints_aes32_sample_rates = {
+	.count = ARRAY_SIZE(hdspm_aes32_sample_rates),
+	.list = hdspm_aes32_sample_rates,
+	.mask = 0
+};
+
 static int snd_hdspm_playback_open(struct snd_pcm_substream *substream)
 {
 	struct hdspm *hdspm = snd_pcm_substream_chip(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
 
-	snd_printdd("Open device substream %d\n", substream->stream);
-
 	spin_lock_irq(&hdspm->lock);
 
 	snd_pcm_set_sync(substream);
@@ -3973,6 +4012,13 @@ static int snd_hdspm_playback_open(struct snd_pcm_substream *substream)
 				   SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 				   &hw_constraints_period_sizes);
 
+	if (hdspm->is_aes32) {
+		snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				&hdspm_hw_constraints_aes32_sample_rates);
+	} else {
+		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				     snd_hdspm_hw_rule_channels, hdspm,
+				     SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 				    snd_hdspm_hw_rule_channels_rate, hdspm,
 				    SNDRV_PCM_HW_PARAM_RATE, -1);
@@ -3980,7 +4026,7 @@ static int snd_hdspm_playback_open(struct snd_pcm_substream *substream)
 		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 				    snd_hdspm_hw_rule_rate_channels, hdspm,
 				    SNDRV_PCM_HW_PARAM_CHANNELS, -1);
-
+	}
 	return 0;
 }
 
@@ -4020,7 +4066,13 @@ static int snd_hdspm_capture_open(struct snd_pcm_substream *substream)
 	snd_pcm_hw_constraint_list(runtime, 0,
 				   SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 				   &hw_constraints_period_sizes);
-
+	if (hdspm->is_aes32) {
+		snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				&hdspm_hw_constraints_aes32_sample_rates);
+	} else {
+		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				     snd_hdspm_hw_rule_channels, hdspm,
+				     SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
 				    snd_hdspm_hw_rule_channels_rate, hdspm,
 				    SNDRV_PCM_HW_PARAM_RATE, -1);
@@ -4028,6 +4080,7 @@ static int snd_hdspm_capture_open(struct snd_pcm_substream *substream)
 		snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 				    snd_hdspm_hw_rule_rate_channels, hdspm,
 				    SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+	}
 	return 0;
 }