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linux-next/drivers/media/dvb-frontends/stb6000.c
Julia Lawall 14c4bf3c6f [media] dvb-frontends: constify dvb_tuner_ops structures 
These structures are only used to copy into other structures, so declare
them as const.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct dvb_tuner_ops i@p = { ... };

@ok1@
identifier r.i;
expression e;
position p;
@@
e = i@p

@ok2@
identifier r.i;
expression e1, e2;
position p;
@@
memcpy(e1, &i@p, e2)

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
struct dvb_tuner_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct dvb_tuner_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-09-19 16:22:55 -03:00

257 lines
5.3 KiB
C
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/*
Driver for ST STB6000 DVBS Silicon tuner
Copyright (C) 2008 Igor M. Liplianin (liplianin@me.by)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <asm/types.h>
#include "stb6000.h"
static int debug;
#define dprintk(args...) \
do { \
if (debug) \
printk(KERN_DEBUG "stb6000: " args); \
} while (0)
struct stb6000_priv {
/* i2c details */
int i2c_address;
struct i2c_adapter *i2c;
u32 frequency;
};
static int stb6000_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
return 0;
}
static int stb6000_sleep(struct dvb_frontend *fe)
{
struct stb6000_priv *priv = fe->tuner_priv;
int ret;
u8 buf[] = { 10, 0 };
struct i2c_msg msg = {
.addr = priv->i2c_address,
.flags = 0,
.buf = buf,
.len = 2
};
dprintk("%s:\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer(priv->i2c, &msg, 1);
if (ret != 1)
dprintk("%s: i2c error\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
return (ret == 1) ? 0 : ret;
}
static int stb6000_set_params(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct stb6000_priv *priv = fe->tuner_priv;
unsigned int n, m;
int ret;
u32 freq_mhz;
int bandwidth;
u8 buf[12];
struct i2c_msg msg = {
.addr = priv->i2c_address,
.flags = 0,
.buf = buf,
.len = 12
};
dprintk("%s:\n", __func__);
freq_mhz = p->frequency / 1000;
bandwidth = p->symbol_rate / 1000000;
if (bandwidth > 31)
bandwidth = 31;
if ((freq_mhz > 949) && (freq_mhz < 2151)) {
buf[0] = 0x01;
buf[1] = 0xac;
if (freq_mhz < 1950)
buf[1] = 0xaa;
if (freq_mhz < 1800)
buf[1] = 0xa8;
if (freq_mhz < 1650)
buf[1] = 0xa6;
if (freq_mhz < 1530)
buf[1] = 0xa5;
if (freq_mhz < 1470)
buf[1] = 0xa4;
if (freq_mhz < 1370)
buf[1] = 0xa2;
if (freq_mhz < 1300)
buf[1] = 0xa1;
if (freq_mhz < 1200)
buf[1] = 0xa0;
if (freq_mhz < 1075)
buf[1] = 0xbc;
if (freq_mhz < 1000)
buf[1] = 0xba;
if (freq_mhz < 1075) {
n = freq_mhz / 8; /* vco=lo*4 */
m = 2;
} else {
n = freq_mhz / 16; /* vco=lo*2 */
m = 1;
}
buf[2] = n >> 1;
buf[3] = (unsigned char)(((n & 1) << 7) |
(m * freq_mhz - n * 16) | 0x60);
buf[4] = 0x04;
buf[5] = 0x0e;
buf[6] = (unsigned char)(bandwidth);
buf[7] = 0xd8;
buf[8] = 0xd0;
buf[9] = 0x50;
buf[10] = 0xeb;
buf[11] = 0x4f;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer(priv->i2c, &msg, 1);
if (ret != 1)
dprintk("%s: i2c error\n", __func__);
udelay(10);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
buf[0] = 0x07;
buf[1] = 0xdf;
buf[2] = 0xd0;
buf[3] = 0x50;
buf[4] = 0xfb;
msg.len = 5;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer(priv->i2c, &msg, 1);
if (ret != 1)
dprintk("%s: i2c error\n", __func__);
udelay(10);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
priv->frequency = freq_mhz * 1000;
return (ret == 1) ? 0 : ret;
}
return -1;
}
static int stb6000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct stb6000_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}
static const struct dvb_tuner_ops stb6000_tuner_ops = {
.info = {
.name = "ST STB6000",
.frequency_min = 950000,
.frequency_max = 2150000
},
.release = stb6000_release,
.sleep = stb6000_sleep,
.set_params = stb6000_set_params,
.get_frequency = stb6000_get_frequency,
};
struct dvb_frontend *stb6000_attach(struct dvb_frontend *fe, int addr,
struct i2c_adapter *i2c)
{
struct stb6000_priv *priv = NULL;
u8 b0[] = { 0 };
u8 b1[] = { 0, 0 };
struct i2c_msg msg[2] = {
{
.addr = addr,
.flags = 0,
.buf = b0,
.len = 0
}, {
.addr = addr,
.flags = I2C_M_RD,
.buf = b1,
.len = 2
}
};
int ret;
dprintk("%s:\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
/* is some i2c device here ? */
ret = i2c_transfer(i2c, msg, 2);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
if (ret != 2)
return NULL;
priv = kzalloc(sizeof(struct stb6000_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->i2c_address = addr;
priv->i2c = i2c;
memcpy(&fe->ops.tuner_ops, &stb6000_tuner_ops,
sizeof(struct dvb_tuner_ops));
fe->tuner_priv = priv;
return fe;
}
EXPORT_SYMBOL(stb6000_attach);
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("DVB STB6000 driver");
MODULE_AUTHOR("Igor M. Liplianin <liplianin@me.by>");
MODULE_LICENSE("GPL");
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