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Diffstat (limited to 'drivers/media/dvb/frontends')
-rw-r--r--drivers/media/dvb/frontends/dvb-pll.c173
-rw-r--r--drivers/media/dvb/frontends/dvb-pll.h16
2 files changed, 187 insertions, 2 deletions
diff --git a/drivers/media/dvb/frontends/dvb-pll.c b/drivers/media/dvb/frontends/dvb-pll.c
index 50a79eea892a..87fd8861a411 100644
--- a/drivers/media/dvb/frontends/dvb-pll.c
+++ b/drivers/media/dvb/frontends/dvb-pll.c
@@ -419,6 +419,19 @@ struct dvb_pll_desc dvb_pll_thomson_fe6600 = {
};
EXPORT_SYMBOL(dvb_pll_thomson_fe6600);
+struct dvb_pll_priv {
+ /* i2c details */
+ int pll_i2c_address;
+ struct i2c_adapter *i2c;
+
+ /* the PLL descriptor */
+ struct dvb_pll_desc *pll_desc;
+
+ /* cached frequency/bandwidth */
+ u32 frequency;
+ u32 bandwidth;
+};
+
/* ----------------------------------------------------------- */
/* code */
@@ -443,7 +456,8 @@ int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
if (debug)
printk("pll: %s: freq=%d bw=%d | i=%d/%d\n",
desc->name, freq, bandwidth, i, desc->count);
- BUG_ON(i == desc->count);
+ if (i == desc->count)
+ return -EINVAL;
div = (freq + desc->entries[i].offset) / desc->entries[i].stepsize;
buf[0] = div >> 8;
@@ -462,6 +476,163 @@ int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
}
EXPORT_SYMBOL(dvb_pll_configure);
+static int dvb_pll_release(struct dvb_frontend *fe)
+{
+ if (fe->tuner_priv)
+ kfree(fe->tuner_priv);
+ fe->tuner_priv = NULL;
+ return 0;
+}
+
+static int dvb_pll_sleep(struct dvb_frontend *fe)
+{
+ struct dvb_pll_priv *priv = fe->tuner_priv;
+ u8 buf[4];
+ struct i2c_msg msg =
+ { .addr = priv->pll_i2c_address, .flags = 0, .buf = buf, .len = sizeof(buf) };
+ int i;
+ int result;
+
+ for (i = 0; i < priv->pll_desc->count; i++) {
+ if (priv->pll_desc->entries[i].limit == 0)
+ break;
+ }
+ if (i == priv->pll_desc->count)
+ return 0;
+
+ buf[0] = 0;
+ buf[1] = 0;
+ buf[2] = priv->pll_desc->entries[i].config;
+ buf[3] = priv->pll_desc->entries[i].cb;
+
+ if (fe->ops->i2c_gate_ctrl)
+ fe->ops->i2c_gate_ctrl(fe, 1);
+ if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
+ return result;
+ }
+
+ return 0;
+}
+
+static int dvb_pll_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
+{
+ struct dvb_pll_priv *priv = fe->tuner_priv;
+ u8 buf[4];
+ struct i2c_msg msg =
+ { .addr = priv->pll_i2c_address, .flags = 0, .buf = buf, .len = sizeof(buf) };
+ int result;
+ u32 div;
+ int i;
+ u32 bandwidth = 0;
+
+ if (priv->i2c == NULL)
+ return -EINVAL;
+
+ // DVBT bandwidth only just now
+ if (fe->ops->info.type == FE_OFDM) {
+ bandwidth = params->u.ofdm.bandwidth;
+ }
+
+ if ((result = dvb_pll_configure(priv->pll_desc, buf, params->frequency, bandwidth)) != 0)
+ return result;
+
+ if (fe->ops->i2c_gate_ctrl)
+ fe->ops->i2c_gate_ctrl(fe, 1);
+ if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
+ return result;
+ }
+
+ // calculate the frequency we set it to
+ for (i = 0; i < priv->pll_desc->count; i++) {
+ if (params->frequency > priv->pll_desc->entries[i].limit)
+ continue;
+ break;
+ }
+ div = (params->frequency + priv->pll_desc->entries[i].offset) / priv->pll_desc->entries[i].stepsize;
+ priv->frequency = (div * priv->pll_desc->entries[i].stepsize) - priv->pll_desc->entries[i].offset;
+ priv->bandwidth = bandwidth;
+
+ return 0;
+}
+
+static int dvb_pll_pllbuf(struct dvb_frontend *fe, struct dvb_frontend_parameters *params, u8 *buf, int buf_len)
+{
+ struct dvb_pll_priv *priv = fe->tuner_priv;
+ int result;
+ u32 div;
+ int i;
+ u32 bandwidth = 0;
+
+ if (buf_len < 5)
+ return -EINVAL;
+
+ // DVBT bandwidth only just now
+ if (fe->ops->info.type == FE_OFDM) {
+ bandwidth = params->u.ofdm.bandwidth;
+ }
+
+ if ((result = dvb_pll_configure(priv->pll_desc, buf+1, params->frequency, bandwidth)) != 0)
+ return result;
+ buf[0] = priv->pll_i2c_address;
+
+ // calculate the frequency we set it to
+ for (i = 0; i < priv->pll_desc->count; i++) {
+ if (params->frequency > priv->pll_desc->entries[i].limit)
+ continue;
+ break;
+ }
+ div = (params->frequency + priv->pll_desc->entries[i].offset) / priv->pll_desc->entries[i].stepsize;
+ priv->frequency = (div * priv->pll_desc->entries[i].stepsize) - priv->pll_desc->entries[i].offset;
+ priv->bandwidth = bandwidth;
+
+ return 5;
+}
+
+static int dvb_pll_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct dvb_pll_priv *priv = fe->tuner_priv;
+ *frequency = priv->frequency;
+ return 0;
+}
+
+static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+ struct dvb_pll_priv *priv = fe->tuner_priv;
+ *bandwidth = priv->bandwidth;
+ return 0;
+}
+
+static struct dvb_tuner_ops dvb_pll_tuner_ops = {
+ .release = dvb_pll_release,
+ .sleep = dvb_pll_sleep,
+ .set_params = dvb_pll_set_params,
+ .pllbuf = dvb_pll_pllbuf,
+ .get_frequency = dvb_pll_get_frequency,
+ .get_bandwidth = dvb_pll_get_bandwidth,
+};
+
+int dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, struct i2c_adapter *i2c, struct dvb_pll_desc *desc)
+{
+ struct dvb_pll_priv *priv = NULL;
+
+ priv = kzalloc(sizeof(struct dvb_pll_priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ priv->pll_i2c_address = pll_addr;
+ priv->i2c = i2c;
+ priv->pll_desc = desc;
+
+ memcpy(&fe->ops->tuner_ops, &dvb_pll_tuner_ops, sizeof(struct dvb_tuner_ops));
+ strncpy(fe->ops->tuner_ops.info.name, desc->name, 128);
+ fe->ops->tuner_ops.info.frequency_min = desc->min;
+ fe->ops->tuner_ops.info.frequency_min = desc->max;
+
+ fe->tuner_priv = priv;
+ return 0;
+}
+EXPORT_SYMBOL(dvb_pll_attach);
+
MODULE_DESCRIPTION("dvb pll library");
MODULE_AUTHOR("Gerd Knorr");
MODULE_LICENSE("GPL");
diff --git a/drivers/media/dvb/frontends/dvb-pll.h b/drivers/media/dvb/frontends/dvb-pll.h
index 2b8461784989..3908ae1d446a 100644
--- a/drivers/media/dvb/frontends/dvb-pll.h
+++ b/drivers/media/dvb/frontends/dvb-pll.h
@@ -5,6 +5,9 @@
#ifndef __DVB_PLL_H__
#define __DVB_PLL_H__
+#include <linux/i2c.h>
+#include "dvb_frontend.h"
+
struct dvb_pll_desc {
char *name;
u32 min;
@@ -44,7 +47,18 @@ extern struct dvb_pll_desc dvb_pll_philips_td1316;
extern struct dvb_pll_desc dvb_pll_thomson_fe6600;
-int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
+extern int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
u32 freq, int bandwidth);
+/**
+ * Attach a dvb-pll to the supplied frontend structure.
+ *
+ * @param fe Frontend to attach to.
+ * @param pll_addr i2c address of the PLL (if used).
+ * @param i2c i2c adapter to use (set to NULL if not used).
+ * @param desc dvb_pll_desc to use.
+ * @return 0 on success, nonzero on failure.
+ */
+extern int dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, struct i2c_adapter *i2c, struct dvb_pll_desc *desc);
+
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 16:36:38 +0000