openwrt-xburst/target/linux/olpc/patches/110-olpc_sound.patch

Index: linux-2.6.23.17/include/sound/ac97_codec.h
===================================================================
--- linux-2.6.23.17.orig/include/sound/ac97_codec.h
+++ linux-2.6.23.17/include/sound/ac97_codec.h
@@ -281,10 +281,12 @@
 /* specific - Analog Devices */
 #define AC97_AD_TEST		0x5a	/* test register */
 #define AC97_AD_TEST2		0x5c	/* undocumented test register 2 */
+#define AC97_AD_HPFD_SHIFT	12	/* High Pass Filter Disable */
 #define AC97_AD_CODEC_CFG	0x70	/* codec configuration */
 #define AC97_AD_JACK_SPDIF	0x72	/* Jack Sense & S/PDIF */
 #define AC97_AD_SERIAL_CFG	0x74	/* Serial Configuration */
 #define AC97_AD_MISC		0x76	/* Misc Control Bits */
+#define AC97_AD_VREFD_SHIFT	2	/* V_REFOUT Disable (AD1888) */
 
 /* specific - Cirrus Logic */
 #define AC97_CSR_ACMODE		0x5e	/* AC Mode Register */
Index: linux-2.6.23.17/sound/pci/ac97/ac97_codec.c
===================================================================
--- linux-2.6.23.17.orig/sound/pci/ac97/ac97_codec.c
+++ linux-2.6.23.17/sound/pci/ac97/ac97_codec.c
@@ -49,7 +49,7 @@ module_param(enable_loopback, bool, 0444
 MODULE_PARM_DESC(enable_loopback, "Enable AC97 ADC/DAC Loopback Control");
 
 #ifdef CONFIG_SND_AC97_POWER_SAVE
-static int power_save;
+static int power_save = 1;
 module_param(power_save, bool, 0644);
 MODULE_PARM_DESC(power_save, "Enable AC97 power-saving control");
 #endif
Index: linux-2.6.23.17/sound/pci/ac97/ac97_patch.c
===================================================================
--- linux-2.6.23.17.orig/sound/pci/ac97/ac97_patch.c
+++ linux-2.6.23.17/sound/pci/ac97/ac97_patch.c
@@ -1973,8 +1973,9 @@ static const struct snd_kcontrol_new snd
 		.get = snd_ac97_ad1888_lohpsel_get,
 		.put = snd_ac97_ad1888_lohpsel_put
 	},
-	AC97_SINGLE("V_REFOUT Enable", AC97_AD_MISC, 2, 1, 1),
-	AC97_SINGLE("High Pass Filter Enable", AC97_AD_TEST2, 12, 1, 1),
+	AC97_SINGLE("V_REFOUT Enable", AC97_AD_MISC, AC97_AD_VREFD_SHIFT, 1, 1),
+	AC97_SINGLE("High Pass Filter Enable", AC97_AD_TEST2,
+			AC97_AD_HPFD_SHIFT, 1, 1),
 	AC97_SINGLE("Spread Front to Surround and Center/LFE", AC97_AD_MISC, 7, 1, 0),
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
Index: linux-2.6.23.17/sound/pci/cs5535audio/Makefile
===================================================================
--- linux-2.6.23.17.orig/sound/pci/cs5535audio/Makefile
+++ linux-2.6.23.17/sound/pci/cs5535audio/Makefile
@@ -8,5 +8,9 @@ ifeq ($(CONFIG_PM),y)
 snd-cs5535audio-objs += cs5535audio_pm.o
 endif
 
+ifdef CONFIG_OLPC
+snd-cs5535audio-objs += cs5535audio_olpc.o
+endif
+
 # Toplevel Module Dependency
 obj-$(CONFIG_SND_CS5535AUDIO) += snd-cs5535audio.o
Index: linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio.c
===================================================================
--- linux-2.6.23.17.orig/sound/pci/cs5535audio/cs5535audio.c
+++ linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio.c
@@ -145,7 +145,7 @@ static unsigned short snd_cs5535audio_ac
 	return snd_cs5535audio_codec_read(cs5535au, reg);
 }
 
-static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
+static int __devinit snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
 {
 	struct snd_card *card = cs5535au->card;
 	struct snd_ac97_bus *pbus;
@@ -160,10 +160,14 @@ static int snd_cs5535audio_mixer(struct 
 		return err;
 
 	memset(&ac97, 0, sizeof(ac97));
-	ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
+	ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM
+			| AC97_SCAP_POWER_SAVE;
 	ac97.private_data = cs5535au;
 	ac97.pci = cs5535au->pci;
 
+	/* olpc_prequirks is dummied out if not olpc */
+	olpc_prequirks(card, &ac97);
+
 	if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
 		snd_printk(KERN_ERR "mixer failed\n");
 		return err;
@@ -171,6 +175,12 @@ static int snd_cs5535audio_mixer(struct 
 
 	snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
 
+	/* olpc_quirks is dummied out if not olpc */
+	if (( err = olpc_quirks(card, cs5535au->ac97)) < 0) {
+		snd_printk(KERN_ERR "olpc quirks failed\n");
+		return err;
+	}
+
 	return 0;
 }
 
@@ -206,7 +216,6 @@ static void process_bm1_irq(struct cs553
 static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id)
 {
 	u16 acc_irq_stat;
-	u8 bm_stat;
 	unsigned char count;
 	struct cs5535audio *cs5535au = dev_id;
 
@@ -217,7 +226,7 @@ static irqreturn_t snd_cs5535audio_inter
 
 	if (!acc_irq_stat)
 		return IRQ_NONE;
-	for (count = 0; count < 10; count++) {
+	for (count = 0; count < 4; count++) {
 		if (acc_irq_stat & (1 << count)) {
 			switch (count) {
 			case IRQ_STS:
@@ -232,26 +241,9 @@ static irqreturn_t snd_cs5535audio_inter
 			case BM1_IRQ_STS:
 				process_bm1_irq(cs5535au);
 				break;
-			case BM2_IRQ_STS:
-				bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS);
-				break;
-			case BM3_IRQ_STS:
-				bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS);
-				break;
-			case BM4_IRQ_STS:
-				bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS);
-				break;
-			case BM5_IRQ_STS:
-				bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS);
-				break;
-			case BM6_IRQ_STS:
-				bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS);
-				break;
-			case BM7_IRQ_STS:
-				bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS);
-				break;
 			default:
-				snd_printk(KERN_ERR "Unexpected irq src\n");
+				snd_printk(KERN_ERR "Unexpected irq src: "
+						"0x%x\n", acc_irq_stat);
 				break;
 			}
 		}
Index: linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio.h
===================================================================
--- linux-2.6.23.17.orig/sound/pci/cs5535audio/cs5535audio.h
+++ linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio.h
@@ -16,57 +16,28 @@
 #define ACC_IRQ_STATUS			0x12
 #define ACC_BM0_CMD			0x20
 #define ACC_BM1_CMD			0x28
-#define ACC_BM2_CMD			0x30
-#define ACC_BM3_CMD			0x38
-#define ACC_BM4_CMD			0x40
-#define ACC_BM5_CMD			0x48
-#define ACC_BM6_CMD			0x50
-#define ACC_BM7_CMD			0x58
 #define ACC_BM0_PRD			0x24
 #define ACC_BM1_PRD			0x2C
-#define ACC_BM2_PRD			0x34
-#define ACC_BM3_PRD			0x3C
-#define ACC_BM4_PRD			0x44
-#define ACC_BM5_PRD			0x4C
-#define ACC_BM6_PRD			0x54
-#define ACC_BM7_PRD			0x5C
 #define ACC_BM0_STATUS			0x21
 #define ACC_BM1_STATUS			0x29
-#define ACC_BM2_STATUS			0x31
-#define ACC_BM3_STATUS			0x39
-#define ACC_BM4_STATUS			0x41
-#define ACC_BM5_STATUS			0x49
-#define ACC_BM6_STATUS			0x51
-#define ACC_BM7_STATUS			0x59
 #define ACC_BM0_PNTR			0x60
 #define ACC_BM1_PNTR			0x64
-#define ACC_BM2_PNTR			0x68
-#define ACC_BM3_PNTR			0x6C
-#define ACC_BM4_PNTR			0x70
-#define ACC_BM5_PNTR			0x74
-#define ACC_BM6_PNTR			0x78
-#define ACC_BM7_PNTR			0x7C
+
 /* acc_codec bar0 reg bits */
 /* ACC_IRQ_STATUS */
 #define IRQ_STS 			0
 #define WU_IRQ_STS 			1
 #define BM0_IRQ_STS 			2
 #define BM1_IRQ_STS 			3
-#define BM2_IRQ_STS 			4
-#define BM3_IRQ_STS 			5
-#define BM4_IRQ_STS 			6
-#define BM5_IRQ_STS		 	7
-#define BM6_IRQ_STS 			8
-#define BM7_IRQ_STS 			9
 /* ACC_BMX_STATUS */
 #define EOP				(1<<0)
 #define BM_EOP_ERR			(1<<1)
 /* ACC_BMX_CTL */
-#define BM_CTL_EN			0x00000001
-#define BM_CTL_PAUSE			0x00000011
-#define BM_CTL_DIS			0x00000000
-#define BM_CTL_BYTE_ORD_LE		0x00000000
-#define BM_CTL_BYTE_ORD_BE		0x00000100
+#define BM_CTL_EN			0x01
+#define BM_CTL_PAUSE			0x03
+#define BM_CTL_DIS			0x00
+#define BM_CTL_BYTE_ORD_LE		0x00
+#define BM_CTL_BYTE_ORD_BE		0x04
 /* cs5535 specific ac97 codec register defines */
 #define CMD_MASK			0xFF00FFFF
 #define CMD_NEW				0x00010000
@@ -106,8 +77,8 @@ struct cs5535audio_dma {
 	struct snd_pcm_substream *substream;
 	unsigned int buf_addr, buf_bytes;
 	unsigned int period_bytes, periods;
-	int suspended;
 	u32 saved_prd;
+	int pcm_open_flag;
 };
 
 struct cs5535audio {
@@ -123,8 +94,21 @@ struct cs5535audio {
 	struct cs5535audio_dma dmas[NUM_CS5535AUDIO_DMAS];
 };
 
+#ifdef CONFIG_PM
 int snd_cs5535audio_suspend(struct pci_dev *pci, pm_message_t state);
 int snd_cs5535audio_resume(struct pci_dev *pci);
+#endif
+
+#ifdef CONFIG_OLPC
+void olpc_prequirks(struct snd_card *card, struct snd_ac97_template *ac97) __devinit;
+int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97) __devinit;
+int olpc_ai_enable(struct snd_ac97 *ac97, u8 val);
+#else
+#define olpc_prequirks(arg,arg2)	do {} while (0)
+#define olpc_quirks(arg,arg2)		(0)
+#define olpc_ai_enable(a, v) (0)
+#endif
+
 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535audio);
 
 #endif /* __SOUND_CS5535AUDIO_H */
Index: linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio_pcm.c
===================================================================
--- linux-2.6.23.17.orig/sound/pci/cs5535audio/cs5535audio_pcm.c
+++ linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio_pcm.c
@@ -164,6 +164,7 @@ static int cs5535audio_build_dma_packets
 	jmpprd_addr = cpu_to_le32(lastdesc->addr +
 				  (sizeof(struct cs5535audio_dma_desc)*periods));
 
+	dma->substream = substream;
 	dma->period_bytes = period_bytes;
 	dma->periods = periods;
 	spin_lock_irq(&cs5535au->reg_lock);
@@ -241,6 +242,7 @@ static void cs5535audio_clear_dma_packet
 {
 	snd_dma_free_pages(&dma->desc_buf);
 	dma->desc_buf.area = NULL;
+	dma->substream = NULL;
 }
 
 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
@@ -260,6 +262,9 @@ static int snd_cs5535audio_hw_params(str
 	err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 					    params_periods(hw_params),
 					    params_period_bytes(hw_params));
+	if (!err)
+		dma->pcm_open_flag = 1;
+
 	return err;
 }
 
@@ -268,6 +273,15 @@ static int snd_cs5535audio_hw_free(struc
 	struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 	struct cs5535audio_dma *dma = substream->runtime->private_data;
 
+	if (dma->pcm_open_flag) {
+		if (substream == cs5535au->playback_substream)
+			snd_ac97_update_power(cs5535au->ac97,
+					AC97_PCM_FRONT_DAC_RATE, 0);
+		else
+			snd_ac97_update_power(cs5535au->ac97,
+					AC97_PCM_LR_ADC_RATE, 0);
+		dma->pcm_open_flag = 0;
+	}
 	cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 	return snd_pcm_lib_free_pages(substream);
 }
@@ -298,14 +312,12 @@ static int snd_cs5535audio_trigger(struc
 		break;
 	case SNDRV_PCM_TRIGGER_RESUME:
 		dma->ops->enable_dma(cs5535au);
-		dma->suspended = 0;
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 		dma->ops->disable_dma(cs5535au);
 		break;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		dma->ops->disable_dma(cs5535au);
-		dma->suspended = 1;
 		break;
 	default:
 		snd_printk(KERN_ERR "unhandled trigger\n");
@@ -344,6 +356,7 @@ static int snd_cs5535audio_capture_open(
 	int err;
 	struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ac97 *ac97 = cs5535au->ac97;
 
 	runtime->hw = snd_cs5535audio_capture;
 	cs5535au->capture_substream = substream;
@@ -352,11 +365,29 @@ static int snd_cs5535audio_capture_open(
 	if ((err = snd_pcm_hw_constraint_integer(runtime,
 					 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 		return err;
-	return 0;
+
+#ifdef CONFIG_OLPC
+	/* Disable Analog Input */
+	olpc_ai_enable(ac97, 0);
+	/* Enable V_ref bias while recording. */
+	snd_ac97_update_bits(ac97, AC97_AD_MISC, 1<<AC97_AD_VREFD_SHIFT, 0);
+#endif
+	return err;
 }
 
 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 {
+#ifdef CONFIG_OLPC
+	struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
+	struct snd_ac97 *ac97 = cs5535au->ac97;
+
+	/* Disable Analog Input */
+	olpc_ai_enable(ac97, 0);
+	/* Disable V_ref bias. */
+	snd_ac97_update_bits(ac97, AC97_AD_MISC, 1<<AC97_AD_VREFD_SHIFT,
+			1<<AC97_AD_VREFD_SHIFT);
+#endif
+
 	return 0;
 }
 
Index: linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio_pm.c
===================================================================
--- linux-2.6.23.17.orig/sound/pci/cs5535audio/cs5535audio_pm.c
+++ linux-2.6.23.17/sound/pci/cs5535audio/cs5535audio_pm.c
@@ -64,18 +64,21 @@ int snd_cs5535audio_suspend(struct pci_d
 	int i;
 
 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+	snd_pcm_suspend_all(cs5535au->pcm);
+	snd_ac97_suspend(cs5535au->ac97);
 	for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
 		struct cs5535audio_dma *dma = &cs5535au->dmas[i];
-		if (dma && dma->substream && !dma->suspended) 
+		if (dma && dma->substream)
 			dma->saved_prd = dma->ops->read_prd(cs5535au);
 	}
-	snd_pcm_suspend_all(cs5535au->pcm);
-	snd_ac97_suspend(cs5535au->ac97);
 	/* save important regs, then disable aclink in hw */
 	snd_cs5535audio_stop_hardware(cs5535au);
 
+	if (pci_save_state(pci)) {
+		printk(KERN_ERR "cs5535audio: pci_save_state failed!\n");
+		return -EIO;
+	}
 	pci_disable_device(pci);
-	pci_save_state(pci);
 	pci_set_power_state(pci, pci_choose_state(pci, state));
 	return 0;
 }
@@ -89,7 +92,12 @@ int snd_cs5535audio_resume(struct pci_de
 	int i;
 
 	pci_set_power_state(pci, PCI_D0);
-	pci_restore_state(pci);
+	if (pci_restore_state(pci) < 0) {
+		printk(KERN_ERR "cs5535audio: pci_restore_state failed, "
+		       "disabling device\n");
+		snd_card_disconnect(card);
+		return -EIO;
+	}
 	if (pci_enable_device(pci) < 0) {
 		printk(KERN_ERR "cs5535audio: pci_enable_device failed, "
 		       "disabling device\n");
@@ -112,17 +120,17 @@ int snd_cs5535audio_resume(struct pci_de
 	if (!timeout)
 		snd_printk(KERN_ERR "Failure getting AC Link ready\n");
 
-	/* we depend on ac97 to perform the codec power up */
-	snd_ac97_resume(cs5535au->ac97);
 	/* set up rate regs, dma. actual initiation is done in trig */
 	for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
 		struct cs5535audio_dma *dma = &cs5535au->dmas[i];
-		if (dma && dma->substream && dma->suspended) {
+		if (dma && dma->substream) {
 			dma->substream->ops->prepare(dma->substream);
 			dma->ops->setup_prd(cs5535au, dma->saved_prd);
 		}
 	}
-		
+
+	/* we depend on ac97 to perform the codec power up */
+	snd_ac97_resume(cs5535au->ac97);
 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 
 	return 0;