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https://github.com/FEX-Emu/linux.git
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V4L/DVB (3885): Convert dvb-pll to be a refactored tuner
Rename pll calls to appropriate tuner calls. Remove pll functions from demod structures. Hook tuner call into tuner_ops. Remove BUG_ON() and convert to a soft error. Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Andrew de Quincey
Mauro Carvalho Chehab
parent
a263394b48
commit
272bc4db79
@ -419,6 +419,19 @@ struct dvb_pll_desc dvb_pll_thomson_fe6600 = {
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};
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EXPORT_SYMBOL(dvb_pll_thomson_fe6600);
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struct dvb_pll_priv {
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/* i2c details */
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int pll_i2c_address;
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struct i2c_adapter *i2c;
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/* the PLL descriptor */
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struct dvb_pll_desc *pll_desc;
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/* cached frequency/bandwidth */
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u32 frequency;
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u32 bandwidth;
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};
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/* ----------------------------------------------------------- */
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/* code */
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@ -443,7 +456,8 @@ int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
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if (debug)
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printk("pll: %s: freq=%d bw=%d | i=%d/%d\n",
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desc->name, freq, bandwidth, i, desc->count);
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BUG_ON(i == desc->count);
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if (i == desc->count)
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return -EINVAL;
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div = (freq + desc->entries[i].offset) / desc->entries[i].stepsize;
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buf[0] = div >> 8;
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@ -462,6 +476,163 @@ int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
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}
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EXPORT_SYMBOL(dvb_pll_configure);
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static int dvb_pll_release(struct dvb_frontend *fe)
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{
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if (fe->tuner_priv)
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kfree(fe->tuner_priv);
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fe->tuner_priv = NULL;
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return 0;
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}
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static int dvb_pll_sleep(struct dvb_frontend *fe)
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{
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struct dvb_pll_priv *priv = fe->tuner_priv;
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u8 buf[4];
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struct i2c_msg msg =
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{ .addr = priv->pll_i2c_address, .flags = 0, .buf = buf, .len = sizeof(buf) };
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int i;
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int result;
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for (i = 0; i < priv->pll_desc->count; i++) {
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if (priv->pll_desc->entries[i].limit == 0)
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break;
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}
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if (i == priv->pll_desc->count)
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return 0;
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buf[0] = 0;
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buf[1] = 0;
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buf[2] = priv->pll_desc->entries[i].config;
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buf[3] = priv->pll_desc->entries[i].cb;
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if (fe->ops->i2c_gate_ctrl)
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fe->ops->i2c_gate_ctrl(fe, 1);
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if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
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return result;
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}
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return 0;
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}
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static int dvb_pll_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
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{
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struct dvb_pll_priv *priv = fe->tuner_priv;
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u8 buf[4];
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struct i2c_msg msg =
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{ .addr = priv->pll_i2c_address, .flags = 0, .buf = buf, .len = sizeof(buf) };
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int result;
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u32 div;
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int i;
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u32 bandwidth = 0;
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if (priv->i2c == NULL)
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return -EINVAL;
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// DVBT bandwidth only just now
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if (fe->ops->info.type == FE_OFDM) {
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bandwidth = params->u.ofdm.bandwidth;
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}
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if ((result = dvb_pll_configure(priv->pll_desc, buf, params->frequency, bandwidth)) != 0)
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return result;
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if (fe->ops->i2c_gate_ctrl)
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fe->ops->i2c_gate_ctrl(fe, 1);
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if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
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return result;
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}
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// calculate the frequency we set it to
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for (i = 0; i < priv->pll_desc->count; i++) {
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if (params->frequency > priv->pll_desc->entries[i].limit)
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continue;
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break;
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}
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div = (params->frequency + priv->pll_desc->entries[i].offset) / priv->pll_desc->entries[i].stepsize;
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priv->frequency = (div * priv->pll_desc->entries[i].stepsize) - priv->pll_desc->entries[i].offset;
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priv->bandwidth = bandwidth;
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return 0;
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}
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static int dvb_pll_pllbuf(struct dvb_frontend *fe, struct dvb_frontend_parameters *params, u8 *buf, int buf_len)
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{
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struct dvb_pll_priv *priv = fe->tuner_priv;
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int result;
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u32 div;
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int i;
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u32 bandwidth = 0;
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if (buf_len < 5)
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return -EINVAL;
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// DVBT bandwidth only just now
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if (fe->ops->info.type == FE_OFDM) {
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bandwidth = params->u.ofdm.bandwidth;
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}
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if ((result = dvb_pll_configure(priv->pll_desc, buf+1, params->frequency, bandwidth)) != 0)
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return result;
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buf[0] = priv->pll_i2c_address;
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// calculate the frequency we set it to
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for (i = 0; i < priv->pll_desc->count; i++) {
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if (params->frequency > priv->pll_desc->entries[i].limit)
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continue;
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break;
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}
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div = (params->frequency + priv->pll_desc->entries[i].offset) / priv->pll_desc->entries[i].stepsize;
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priv->frequency = (div * priv->pll_desc->entries[i].stepsize) - priv->pll_desc->entries[i].offset;
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priv->bandwidth = bandwidth;
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return 5;
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}
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static int dvb_pll_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct dvb_pll_priv *priv = fe->tuner_priv;
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*frequency = priv->frequency;
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return 0;
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}
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static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
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{
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struct dvb_pll_priv *priv = fe->tuner_priv;
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*bandwidth = priv->bandwidth;
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return 0;
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}
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static struct dvb_tuner_ops dvb_pll_tuner_ops = {
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.release = dvb_pll_release,
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.sleep = dvb_pll_sleep,
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.set_params = dvb_pll_set_params,
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.pllbuf = dvb_pll_pllbuf,
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.get_frequency = dvb_pll_get_frequency,
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.get_bandwidth = dvb_pll_get_bandwidth,
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};
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int dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, struct i2c_adapter *i2c, struct dvb_pll_desc *desc)
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{
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struct dvb_pll_priv *priv = NULL;
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priv = kzalloc(sizeof(struct dvb_pll_priv), GFP_KERNEL);
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if (priv == NULL)
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return -ENOMEM;
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priv->pll_i2c_address = pll_addr;
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priv->i2c = i2c;
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priv->pll_desc = desc;
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memcpy(&fe->ops->tuner_ops, &dvb_pll_tuner_ops, sizeof(struct dvb_tuner_ops));
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strncpy(fe->ops->tuner_ops.info.name, desc->name, 128);
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fe->ops->tuner_ops.info.frequency_min = desc->min;
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fe->ops->tuner_ops.info.frequency_min = desc->max;
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fe->tuner_priv = priv;
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return 0;
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}
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EXPORT_SYMBOL(dvb_pll_attach);
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MODULE_DESCRIPTION("dvb pll library");
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MODULE_AUTHOR("Gerd Knorr");
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MODULE_LICENSE("GPL");
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@ -5,6 +5,9 @@
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#ifndef __DVB_PLL_H__
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#define __DVB_PLL_H__
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#include <linux/i2c.h>
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#include "dvb_frontend.h"
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struct dvb_pll_desc {
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char *name;
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u32 min;
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@ -44,7 +47,18 @@ extern struct dvb_pll_desc dvb_pll_philips_td1316;
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extern struct dvb_pll_desc dvb_pll_thomson_fe6600;
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int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
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extern int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
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u32 freq, int bandwidth);
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/**
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* Attach a dvb-pll to the supplied frontend structure.
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*
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* @param fe Frontend to attach to.
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* @param pll_addr i2c address of the PLL (if used).
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* @param i2c i2c adapter to use (set to NULL if not used).
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* @param desc dvb_pll_desc to use.
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* @return 0 on success, nonzero on failure.
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*/
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extern int dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, struct i2c_adapter *i2c, struct dvb_pll_desc *desc);
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#endif
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