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authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-10-06 16:54:34 +0100
committerTakashi Iwai <tiwai@suse.de>2008-10-13 02:17:10 +0200
commitdd0c0c805d932f34e87ee3c2db9eaee0974bfef8 (patch)
treebd7e40a000ee332903567c0fc794c0d5614b376b /sound/soc/codecs/wm8753.c
parentdf91ddf178481e68b8517bed0813d032d493efa0 (diff)
ALSA: ASoC: Add WM8753 SPI support
Implement SPI support for WM8753, cut'n'pasting from the support for WM8731 contributed by Cliff Cai and Alan Horstmann since the wire format is the same for both codecs. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/soc/codecs/wm8753.c')
-rw-r--r--sound/soc/codecs/wm8753.c71
1 files changed, 69 insertions, 2 deletions
diff --git a/sound/soc/codecs/wm8753.c b/sound/soc/codecs/wm8753.c
index 8c4df44f334..83ba4199c9c 100644
--- a/sound/soc/codecs/wm8753.c
+++ b/sound/soc/codecs/wm8753.c
@@ -40,6 +40,7 @@
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -1719,6 +1720,63 @@ err_driver:
}
#endif
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8753_spi_probe(struct spi_device *spi)
+{
+ struct snd_soc_device *socdev = wm8753_socdev;
+ struct snd_soc_codec *codec = socdev->codec;
+ int ret;
+
+ codec->control_data = spi;
+
+ ret = wm8753_init(socdev);
+ if (ret < 0)
+ dev_err(&spi->dev, "failed to initialise WM8753\n");
+
+ return ret;
+}
+
+static int __devexit wm8753_spi_remove(struct spi_device *spi)
+{
+ return 0;
+}
+
+static struct spi_driver wm8753_spi_driver = {
+ .driver = {
+ .name = "wm8753",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8753_spi_probe,
+ .remove = __devexit_p(wm8753_spi_remove),
+};
+
+static int wm8753_spi_write(struct spi_device *spi, const char *data, int len)
+{
+ struct spi_transfer t;
+ struct spi_message m;
+ u8 msg[2];
+
+ if (len <= 0)
+ return 0;
+
+ msg[0] = data[0];
+ msg[1] = data[1];
+
+ spi_message_init(&m);
+ memset(&t, 0, (sizeof t));
+
+ t.tx_buf = &msg[0];
+ t.len = len;
+
+ spi_message_add_tail(&t, &m);
+ spi_sync(spi, &m);
+
+ return len;
+}
+#endif
+
+
static int wm8753_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@@ -1753,8 +1811,14 @@ static int wm8753_probe(struct platform_device *pdev)
codec->hw_write = (hw_write_t)i2c_master_send;
ret = wm8753_add_i2c_device(pdev, setup);
}
-#else
- /* Add other interfaces here */
+#endif
+#if defined(CONFIG_SPI_MASTER)
+ if (setup->spi) {
+ codec->hw_write = (hw_write_t)wm8753_spi_write;
+ ret = spi_register_driver(&wm8753_spi_driver);
+ if (ret != 0)
+ printk(KERN_ERR "can't add spi driver");
+ }
#endif
if (ret != 0) {
@@ -1798,6 +1862,9 @@ static int wm8753_remove(struct platform_device *pdev)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8753_i2c_driver);
#endif
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&wm8753_spi_driver);
+#endif
kfree(codec->private_data);
kfree(codec);