[PATCH] ppc64: very basic desktop g5 sound support

This patch hacks the current PowerMac Alsa driver to add some basic support
of analog sound output to some desktop G5s.  It has severe limitations
though:

 - Only 44100Khz 16 bits
 - Only work on G5 models using a TAS3004 analog code, that is early
   single CPU desktops and all dual CPU desktops at this date, but none
   of the more recent ones like iMac G5.
 - It does analog only, no digital/SPDIF support at all, no native
   AC3 support

Better support would require a complete rewrite of the driver (which I am
working on, but don't hold your breath), to properly support the diversity
of apple sound HW setup, including dual codecs, several i2s busses, all the
new codecs used in the new machines, proper clock switching with digital,
etc etc etc...

This patch applies on top of the other PowerMac sound patches I posted in
the past couple of days (new powerbook support and sleep fixes).  

Note: This is a FAQ entry for PowerMac sound support with TI codecs: They
have a feature called "DRC" which is automatically enabled for the internal
speaker (at least when auto mute control is enabled) which will cause your
sound to fade out to nothing after half a second of playback if you don't
set a proper "DRC Range" in the mixer.  So if you have a problem like that,
check alsamixer and raise your DRC Range to something reasonable.

Note2: This patch will also add auto-mute of the speaker when line-out jack
is used on some earlier desktop G4s (and on the G5) in addition to the
headphone jack.  If that behaviour isn't what you want, just disable
auto-muting and use the manual mute controls in alsamixer.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 194 insertions, 65 deletions

diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c
index cb6916e9b74f..c71807e069ee 100644
--- a/sound/ppc/tumbler.c
+++ b/sound/ppc/tumbler.c
@@ -35,14 +35,19 @@
 #include <sound/core.h>
 #include <asm/io.h>
 #include <asm/irq.h>
-#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
+#include <asm/machdep.h>
 #include <asm/pmac_feature.h>
-#else
-#error old crap
-#endif
 #include "pmac.h"
 #include "tumbler_volume.h"
 
+#undef DEBUG
+
+#ifdef DEBUG
+#define DBG(fmt...) printk(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
 /* i2c address for tumbler */
 #define TAS_I2C_ADDR	0x34
 
@@ -78,21 +83,22 @@ enum {
 };
 
 typedef struct pmac_gpio {
-#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
 	unsigned int addr;
-#else
-	void __iomem *addr;
-#endif
-	int active_state;
+	u8 active_val;
+	u8 inactive_val;
+	u8 active_state;
 } pmac_gpio_t;
 
 typedef struct pmac_tumbler_t {
 	pmac_keywest_t i2c;
 	pmac_gpio_t audio_reset;
 	pmac_gpio_t amp_mute;
+	pmac_gpio_t line_mute;
+	pmac_gpio_t line_detect;
 	pmac_gpio_t hp_mute;
 	pmac_gpio_t hp_detect;
 	int headphone_irq;
+	int lineout_irq;
 	unsigned int master_vol[2];
 	unsigned int save_master_switch[2];
 	unsigned int master_switch[2];
@@ -120,6 +126,7 @@ static int send_init_client(pmac_keywest_t *i2c, unsigned int *regs)
 							regs[0], regs[1]);
 			if (err >= 0)
 				break;
+			DBG("(W) i2c error %d\n", err);
 			mdelay(10);
 		} while (count--);
 		if (err < 0)
@@ -137,6 +144,7 @@ static int tumbler_init_client(pmac_keywest_t *i2c)
 		TAS_REG_MCS, (1<<6)|(2<<4)|(2<<2)|0,
 		0, /* terminator */
 	};
+	DBG("(I) tumbler init client\n");
 	return send_init_client(i2c, regs);
 }
 
@@ -151,36 +159,27 @@ static int snapper_init_client(pmac_keywest_t *i2c)
 		TAS_REG_ACS, 0,
 		0, /* terminator */
 	};
+	DBG("(I) snapper init client\n");
 	return send_init_client(i2c, regs);
 }
 	
 /*
  * gpio access
  */
-#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
 #define do_gpio_write(gp, val) \
 	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, (gp)->addr, val)
 #define do_gpio_read(gp) \
 	pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, (gp)->addr, 0)
 #define tumbler_gpio_free(gp) /* NOP */
-#else
-#define do_gpio_write(gp, val)	writeb(val, (gp)->addr)
-#define do_gpio_read(gp)	readb((gp)->addr)
-static inline void tumbler_gpio_free(pmac_gpio_t *gp)
-{
-	if (gp->addr) {
-		iounmap(gp->addr);
-		gp->addr = NULL;
-	}
-}
-#endif /* CONFIG_PPC_HAS_FEATURE_CALLS */
 
 static void write_audio_gpio(pmac_gpio_t *gp, int active)
 {
 	if (! gp->addr)
 		return;
-	active = active ? gp->active_state : !gp->active_state;
-	do_gpio_write(gp, active ? 0x05 : 0x04);
+	active = active ? gp->active_val : gp->inactive_val;
+
+	do_gpio_write(gp, active);
+	DBG("(I) gpio %x write %d\n", gp->addr, active);
 }
 
 static int read_audio_gpio(pmac_gpio_t *gp)
@@ -663,7 +662,7 @@ static int snapper_put_mix(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucont
  * to avoid codec reset on ibook M7
  */
 
-enum { TUMBLER_MUTE_HP, TUMBLER_MUTE_AMP };
+enum { TUMBLER_MUTE_HP, TUMBLER_MUTE_AMP, TUMBLER_MUTE_LINE };
 
 static int tumbler_get_mute_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 {
@@ -672,7 +671,18 @@ static int tumbler_get_mute_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_
 	pmac_gpio_t *gp;
 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
-	gp = (kcontrol->private_value == TUMBLER_MUTE_HP) ? &mix->hp_mute : &mix->amp_mute;
+	switch(kcontrol->private_value) {
+	case TUMBLER_MUTE_HP:
+		gp = &mix->hp_mute;	break;
+	case TUMBLER_MUTE_AMP:
+		gp = &mix->amp_mute;	break;
+	case TUMBLER_MUTE_LINE:
+		gp = &mix->line_mute;	break;
+	default:
+		gp = NULL;
+	}
+	if (gp == NULL)
+		return -EINVAL;
 	ucontrol->value.integer.value[0] = ! read_audio_gpio(gp);
 	return 0;
 }
@@ -689,7 +699,18 @@ static int tumbler_put_mute_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_
 #endif	
 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
-	gp = (kcontrol->private_value == TUMBLER_MUTE_HP) ? &mix->hp_mute : &mix->amp_mute;
+	switch(kcontrol->private_value) {
+	case TUMBLER_MUTE_HP:
+		gp = &mix->hp_mute;	break;
+	case TUMBLER_MUTE_AMP:
+		gp = &mix->amp_mute;	break;
+	case TUMBLER_MUTE_LINE:
+		gp = &mix->line_mute;	break;
+	default:
+		gp = NULL;
+	}
+	if (gp == NULL)
+		return -EINVAL;
 	val = ! read_audio_gpio(gp);
 	if (val != ucontrol->value.integer.value[0]) {
 		write_audio_gpio(gp, ! ucontrol->value.integer.value[0]);
@@ -833,6 +854,14 @@ static snd_kcontrol_new_t tumbler_speaker_sw __initdata = {
 	.put = tumbler_put_mute_switch,
 	.private_value = TUMBLER_MUTE_AMP,
 };
+static snd_kcontrol_new_t tumbler_lineout_sw __initdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Line Out Playback Switch",
+	.info = snd_pmac_boolean_mono_info,
+	.get = tumbler_get_mute_switch,
+	.put = tumbler_put_mute_switch,
+	.private_value = TUMBLER_MUTE_LINE,
+};
 static snd_kcontrol_new_t tumbler_drc_sw __initdata = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "DRC Switch",
@@ -849,7 +878,21 @@ static snd_kcontrol_new_t tumbler_drc_sw __initdata = {
 static int tumbler_detect_headphone(pmac_t *chip)
 {
 	pmac_tumbler_t *mix = chip->mixer_data;
-	return read_audio_gpio(&mix->hp_detect);
+	int detect = 0;
+
+	if (mix->hp_detect.addr)
+		detect |= read_audio_gpio(&mix->hp_detect);
+	return detect;
+}
+
+static int tumbler_detect_lineout(pmac_t *chip)
+{
+	pmac_tumbler_t *mix = chip->mixer_data;
+	int detect = 0;
+
+	if (mix->line_detect.addr)
+		detect |= read_audio_gpio(&mix->line_detect);
+	return detect;
 }
 
 static void check_mute(pmac_t *chip, pmac_gpio_t *gp, int val, int do_notify, snd_kcontrol_t *sw)
@@ -868,6 +911,7 @@ static void device_change_handler(void *self)
 {
 	pmac_t *chip = (pmac_t*) self;
 	pmac_tumbler_t *mix;
+	int headphone, lineout;
 
 	if (!chip)
 		return;
@@ -875,23 +919,35 @@ static void device_change_handler(void *self)
 	mix = chip->mixer_data;
 	snd_assert(mix, return);
 
-	if (tumbler_detect_headphone(chip)) {
-		/* mute speaker */
-		check_mute(chip, &mix->hp_mute, 0, mix->auto_mute_notify,
-			   chip->master_sw_ctl);
+	headphone = tumbler_detect_headphone(chip);
+	lineout = tumbler_detect_lineout(chip);
+
+	DBG("headphone: %d, lineout: %d\n", headphone, lineout);
+
+	if (headphone || lineout) {
+		/* unmute headphone/lineout & mute speaker */
+		if (headphone)
+			check_mute(chip, &mix->hp_mute, 0, mix->auto_mute_notify,
+				   chip->master_sw_ctl);
+		if (lineout && mix->line_mute.addr != 0)
+			check_mute(chip, &mix->line_mute, 0, mix->auto_mute_notify,
+				   chip->lineout_sw_ctl);
 		if (mix->anded_reset)
 			big_mdelay(10);
 		check_mute(chip, &mix->amp_mute, 1, mix->auto_mute_notify,
 			   chip->speaker_sw_ctl);
 		mix->drc_enable = 0;
 	} else {
-		/* unmute speaker */
+		/* unmute speaker, mute others */
 		check_mute(chip, &mix->amp_mute, 0, mix->auto_mute_notify,
 			   chip->speaker_sw_ctl);
 		if (mix->anded_reset)
 			big_mdelay(10);
 		check_mute(chip, &mix->hp_mute, 1, mix->auto_mute_notify,
 			   chip->master_sw_ctl);
+		if (mix->line_mute.addr != 0)
+			check_mute(chip, &mix->line_mute, 1, mix->auto_mute_notify,
+				   chip->lineout_sw_ctl);
 		mix->drc_enable = 1;
 	}
 	if (mix->auto_mute_notify) {
@@ -967,7 +1023,7 @@ static struct device_node *find_compatible_audio_device(const char *name)
 }
 
 /* find an audio device and get its address */
-static long tumbler_find_device(const char *device, pmac_gpio_t *gp, int is_compatible)
+static long tumbler_find_device(const char *device, const char *platform, pmac_gpio_t *gp, int is_compatible)
 {
 	struct device_node *node;
 	u32 *base, addr;
@@ -977,6 +1033,7 @@ static long tumbler_find_device(const char *device, pmac_gpio_t *gp, int is_comp
 	else
 		node = find_audio_device(device);
 	if (! node) {
+		DBG("(W) cannot find audio device %s !\n", device);
 		snd_printdd("cannot find device %s\n", device);
 		return -ENODEV;
 	}
@@ -985,29 +1042,48 @@ static long tumbler_find_device(const char *device, pmac_gpio_t *gp, int is_comp
 	if (! base) {
 		base = (u32 *)get_property(node, "reg", NULL);
 		if (!base) {
+			DBG("(E) cannot find address for device %s !\n", device);
 			snd_printd("cannot find address for device %s\n", device);
 			return -ENODEV;
 		}
-		/* this only work if PPC_HAS_FEATURE_CALLS is set as we
-		 * are only getting the low part of the address
-		 */
 		addr = *base;
 		if (addr < 0x50)
 			addr += 0x50;
 	} else
 		addr = *base;
 
-#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
 	gp->addr = addr & 0x0000ffff;
-#else
-	gp->addr = ioremap((unsigned long)addr, 1);
-#endif
 	/* Try to find the active state, default to 0 ! */
 	base = (u32 *)get_property(node, "audio-gpio-active-state", NULL);
-	if (base)
+	if (base) {
 		gp->active_state = *base;
-	else
+		gp->active_val = (*base) ? 0x5 : 0x4;
+		gp->inactive_val = (*base) ? 0x4 : 0x5;
+	} else {
+		u32 *prop = NULL;
 		gp->active_state = 0;
+		gp->active_val = 0x4;
+		gp->inactive_val = 0x5;
+		/* Here are some crude hacks to extract the GPIO polarity and
+		 * open collector informations out of the do-platform script
+		 * as we don't yet have an interpreter for these things
+		 */
+		if (platform)
+			prop = (u32 *)get_property(node, platform, NULL);
+		if (prop) {
+			if (prop[3] == 0x9 && prop[4] == 0x9) {
+				gp->active_val = 0xd;
+				gp->inactive_val = 0xc;
+			}
+			if (prop[3] == 0x1 && prop[4] == 0x1) {
+				gp->active_val = 0x5;
+				gp->inactive_val = 0x4;
+			}
+		}
+	}
+
+	DBG("(I) GPIO device %s found, offset: %x, active state: %d !\n",
+	    device, gp->addr, gp->active_state);
 
 	return (node->n_intrs > 0) ? node->intrs[0].line : 0;
 }
@@ -1018,6 +1094,7 @@ static void tumbler_reset_audio(pmac_t *chip)
 	pmac_tumbler_t *mix = chip->mixer_data;
 
 	if (mix->anded_reset) {
+		DBG("(I) codec anded reset !\n");
 		write_audio_gpio(&mix->hp_mute, 0);
 		write_audio_gpio(&mix->amp_mute, 0);
 		big_mdelay(200);
@@ -1028,6 +1105,8 @@ static void tumbler_reset_audio(pmac_t *chip)
 		write_audio_gpio(&mix->amp_mute, 0);
 		big_mdelay(100);
 	} else {
+		DBG("(I) codec normal reset !\n");
+
 		write_audio_gpio(&mix->audio_reset, 0);
 		big_mdelay(200);
 		write_audio_gpio(&mix->audio_reset, 1);
@@ -1045,6 +1124,8 @@ static void tumbler_suspend(pmac_t *chip)
 
 	if (mix->headphone_irq >= 0)
 		disable_irq(mix->headphone_irq);
+	if (mix->lineout_irq >= 0)
+		disable_irq(mix->lineout_irq);
 	mix->save_master_switch[0] = mix->master_switch[0];
 	mix->save_master_switch[1] = mix->master_switch[1];
 	mix->master_switch[0] = mix->master_switch[1] = 0;
@@ -1099,41 +1180,59 @@ static void tumbler_resume(pmac_t *chip)
 		chip->update_automute(chip, 0);
 	if (mix->headphone_irq >= 0)
 		enable_irq(mix->headphone_irq);
+	if (mix->lineout_irq >= 0)
+		enable_irq(mix->lineout_irq);
 }
 #endif
 
 /* initialize tumbler */
 static int __init tumbler_init(pmac_t *chip)
 {
-	int irq, err;
+	int irq;
 	pmac_tumbler_t *mix = chip->mixer_data;
 	snd_assert(mix, return -EINVAL);
 
-	if (tumbler_find_device("audio-hw-reset", &mix->audio_reset, 0) < 0)
-		tumbler_find_device("hw-reset", &mix->audio_reset, 1);
-	if (tumbler_find_device("amp-mute", &mix->amp_mute, 0) < 0)
-		tumbler_find_device("amp-mute", &mix->amp_mute, 1);
-	if (tumbler_find_device("headphone-mute", &mix->hp_mute, 0) < 0)
-		tumbler_find_device("headphone-mute", &mix->hp_mute, 1);
-	irq = tumbler_find_device("headphone-detect", &mix->hp_detect, 0);
+	if (tumbler_find_device("audio-hw-reset",
+				"platform-do-hw-reset",
+				&mix->audio_reset, 0) < 0)
+		tumbler_find_device("hw-reset",
+				    "platform-do-hw-reset",
+				    &mix->audio_reset, 1);
+	if (tumbler_find_device("amp-mute",
+				"platform-do-amp-mute",
+				&mix->amp_mute, 0) < 0)
+		tumbler_find_device("amp-mute",
+				    "platform-do-amp-mute",
+				    &mix->amp_mute, 1);
+	if (tumbler_find_device("headphone-mute",
+				"platform-do-headphone-mute",
+				&mix->hp_mute, 0) < 0)
+		tumbler_find_device("headphone-mute",
+				    "platform-do-headphone-mute",
+				    &mix->hp_mute, 1);
+	if (tumbler_find_device("line-output-mute",
+				"platform-do-lineout-mute",
+				&mix->line_mute, 0) < 0)
+		tumbler_find_device("line-output-mute",
+				   "platform-do-lineout-mute",
+				    &mix->line_mute, 1);
+	irq = tumbler_find_device("headphone-detect",
+				  NULL, &mix->hp_detect, 0);
 	if (irq < 0)
-		irq = tumbler_find_device("headphone-detect", &mix->hp_detect, 1);
+		irq = tumbler_find_device("headphone-detect",
+					  NULL, &mix->hp_detect, 1);
 	if (irq < 0)
-		irq = tumbler_find_device("keywest-gpio15", &mix->hp_detect, 1);
+		irq = tumbler_find_device("keywest-gpio15",
+					  NULL, &mix->hp_detect, 1);
+	mix->headphone_irq = irq;
+ 	irq = tumbler_find_device("line-output-detect",
+				  NULL, &mix->line_detect, 0);
+ 	if (irq < 0)
+		irq = tumbler_find_device("line-output-detect",
+					  NULL, &mix->line_detect, 1);
+	mix->lineout_irq = irq;
 
 	tumbler_reset_audio(chip);
-
-	/* activate headphone status interrupts */
-  	if (irq >= 0) {
-		unsigned char val;
-		if ((err = request_irq(irq, headphone_intr, 0,
-				       "Tumbler Headphone Detection", chip)) < 0)
-			return err;
-		/* activate headphone status interrupts */
-		val = do_gpio_read(&mix->hp_detect);
-		do_gpio_write(&mix->hp_detect, val | 0x80);
-	}
-	mix->headphone_irq = irq;
   
 	return 0;
 }
@@ -1146,6 +1245,8 @@ static void tumbler_cleanup(pmac_t *chip)
 
 	if (mix->headphone_irq >= 0)
 		free_irq(mix->headphone_irq, chip);
+	if (mix->lineout_irq >= 0)
+		free_irq(mix->lineout_irq, chip);
 	tumbler_gpio_free(&mix->audio_reset);
 	tumbler_gpio_free(&mix->amp_mute);
 	tumbler_gpio_free(&mix->hp_mute);
@@ -1207,6 +1308,8 @@ int __init snd_pmac_tumbler_init(pmac_t *chip)
 	else
 		mix->i2c.addr = TAS_I2C_ADDR;
 
+	DBG("(I) TAS i2c address is: %x\n", mix->i2c.addr);
+
 	if (chip->model == PMAC_TUMBLER) {
 		mix->i2c.init_client = tumbler_init_client;
 		mix->i2c.name = "TAS3001c";
@@ -1242,6 +1345,11 @@ int __init snd_pmac_tumbler_init(pmac_t *chip)
 	chip->speaker_sw_ctl = snd_ctl_new1(&tumbler_speaker_sw, chip);
 	if ((err = snd_ctl_add(chip->card, chip->speaker_sw_ctl)) < 0)
 		return err;
+	if (mix->line_mute.addr != 0) {
+		chip->lineout_sw_ctl = snd_ctl_new1(&tumbler_lineout_sw, chip);
+		if ((err = snd_ctl_add(chip->card, chip->lineout_sw_ctl)) < 0)
+			return err;
+	}
 	chip->drc_sw_ctl = snd_ctl_new1(&tumbler_drc_sw, chip);
 	if ((err = snd_ctl_add(chip->card, chip->drc_sw_ctl)) < 0)
 		return err;
@@ -1254,11 +1362,32 @@ int __init snd_pmac_tumbler_init(pmac_t *chip)
 	INIT_WORK(&device_change, device_change_handler, (void *)chip);
 
 #ifdef PMAC_SUPPORT_AUTOMUTE
-	if (mix->headphone_irq >=0 && (err = snd_pmac_add_automute(chip)) < 0)
+	if ((mix->headphone_irq >=0 || mix->lineout_irq >= 0)
+	    && (err = snd_pmac_add_automute(chip)) < 0)
 		return err;
 	chip->detect_headphone = tumbler_detect_headphone;
 	chip->update_automute = tumbler_update_automute;
 	tumbler_update_automute(chip, 0); /* update the status only */
+
+	/* activate headphone status interrupts */
+  	if (mix->headphone_irq >= 0) {
+		unsigned char val;
+		if ((err = request_irq(mix->headphone_irq, headphone_intr, 0,
+				       "Sound Headphone Detection", chip)) < 0)
+			return 0;
+		/* activate headphone status interrupts */
+		val = do_gpio_read(&mix->hp_detect);
+		do_gpio_write(&mix->hp_detect, val | 0x80);
+	}
+  	if (mix->lineout_irq >= 0) {
+		unsigned char val;
+		if ((err = request_irq(mix->lineout_irq, headphone_intr, 0,
+				       "Sound Lineout Detection", chip)) < 0)
+			return 0;
+		/* activate headphone status interrupts */
+		val = do_gpio_read(&mix->line_detect);
+		do_gpio_write(&mix->line_detect, val | 0x80);
+	}
 #endif
 
 	return 0;