ALSA: pcxhr - add support for gpio ports and minor bug fix

- add support for gpio ports (2 GPI, 2 GPO) of pcxhr stereo cards
- minor bugfixes : allow setting clock to internal by the mixer
                   even if there is no stream (but monitoring)

Signed-off-by: Markus Bollinger <bollinger@digigram.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 41 insertions, 0 deletions

diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index 27cf2c28d113..ca89106f8c5d 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -1334,6 +1334,40 @@ static void pcxhr_proc_sync(struct snd_info_entry *entry,
         snd_iprintf(buffer, "\n");
 }
 
+static void pcxhr_proc_gpio_read(struct snd_info_entry *entry,
+                                 struct snd_info_buffer *buffer)
+{
+        struct snd_pcxhr *chip = entry->private_data;
+        struct pcxhr_mgr *mgr = chip->mgr;
+        /* commands available when embedded DSP is running */
+        if (mgr->dsp_loaded & (1 << PCXHR_FIRMWARE_DSP_MAIN_INDEX)) {
+                /* gpio ports on stereo boards only available */
+                int value = 0;
+                hr222_read_gpio(mgr, 1, &value);        /* GPI */
+                snd_iprintf(buffer, "GPI: 0x%x\n", value);
+                hr222_read_gpio(mgr, 0, &value);        /* GP0 */
+                snd_iprintf(buffer, "GPO: 0x%x\n", value);
+        } else
+                snd_iprintf(buffer, "no firmware loaded\n");
+        snd_iprintf(buffer, "\n");
+}
+static void pcxhr_proc_gpo_write(struct snd_info_entry *entry,
+                                 struct snd_info_buffer *buffer)
+{
+        struct snd_pcxhr *chip = entry->private_data;
+        struct pcxhr_mgr *mgr = chip->mgr;
+        char line[64];
+        int value;
+        /* commands available when embedded DSP is running */
+        if (!(mgr->dsp_loaded & (1 << PCXHR_FIRMWARE_DSP_MAIN_INDEX)))
+                return;
+        while (!snd_info_get_line(buffer, line, sizeof(line))) {
+                if (sscanf(line, "GPO: 0x%x", &value) != 1)
+                        continue;
+                hr222_write_gpo(mgr, value);    /* GP0 */
+        }
+}
+
 static void __devinit pcxhr_proc_init(struct snd_pcxhr *chip)
 {
         struct snd_info_entry *entry;
@@ -1342,6 +1376,13 @@ static void __devinit pcxhr_proc_init(struct snd_pcxhr *chip)
                 snd_info_set_text_ops(entry, chip, pcxhr_proc_info);
         if (! snd_card_proc_new(chip->card, "sync", &entry))
                 snd_info_set_text_ops(entry, chip, pcxhr_proc_sync);
+        /* gpio available on stereo sound cards only */
+        if (chip->mgr->is_hr_stereo &&
+            !snd_card_proc_new(chip->card, "gpio", &entry)) {
+                snd_info_set_text_ops(entry, chip, pcxhr_proc_gpio_read);
+                entry->c.text.write = pcxhr_proc_gpo_write;
+                entry->mode |= S_IWUSR;
+        }
 }
 /* end of proc interface */