V4L/DVB (9017): Add support for Silicon Laboratories SI2109/2110 demodulators.

Add support for Silicon Laboratories SI2109/2110 demodulator
and cards with it, such as DvbWorld PCI2002.

Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/si21xx.h b/drivers/media/dvb/frontends/si21xx.h
new file mode 100644
index 000000000000..141b5b8a5f63
--- /dev/null
+++ b/drivers/media/dvb/frontends/si21xx.h
@@ -0,0 +1,37 @@
+#ifndef SI21XX_H
+#define SI21XX_H
+
+#include <linux/dvb/frontend.h>
+#include "dvb_frontend.h"
+
+struct si21xx_config {
+        /* the demodulator's i2c address */
+        u8 demod_address;
+
+        /* minimum delay before retuning */
+        int min_delay_ms;
+};
+
+#if defined(CONFIG_DVB_SI21XX) || \
+                (defined(CONFIG_DVB_SI21XX_MODULE) && defined(MODULE))
+extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
+                                                struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend *si21xx_attach(
+                const struct si21xx_config *config, struct i2c_adapter *i2c)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return NULL;
+}
+#endif
+
+static inline int si21xx_writeregister(struct dvb_frontend *fe, u8 reg, u8 val)
+{
+        int r = 0;
+        u8 buf[] = {reg, val};
+        if (fe->ops.write)
+                r = fe->ops.write(fe, buf, 2);
+        return r;
+}
+
+#endif