312 lines
7.1 KiB
C
312 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Driver for Sharp IX2505V (marked B0017) DVB-S silicon tuner
|
|
*
|
|
* Copyright (C) 2010 Malcolm Priestley
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/dvb/frontend.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "ix2505v.h"
|
|
|
|
static int ix2505v_debug;
|
|
#define dprintk(level, args...) do { \
|
|
if (ix2505v_debug & level) \
|
|
printk(KERN_DEBUG "ix2505v: " args); \
|
|
} while (0)
|
|
|
|
#define deb_info(args...) dprintk(0x01, args)
|
|
#define deb_i2c(args...) dprintk(0x02, args)
|
|
|
|
struct ix2505v_state {
|
|
struct i2c_adapter *i2c;
|
|
const struct ix2505v_config *config;
|
|
u32 frequency;
|
|
};
|
|
|
|
/*
|
|
* Data read format of the Sharp IX2505V B0017
|
|
*
|
|
* byte1: 1 | 1 | 0 | 0 | 0 | MA1 | MA0 | 1
|
|
* byte2: POR | FL | RD2 | RD1 | RD0 | X | X | X
|
|
*
|
|
* byte1 = address
|
|
* byte2;
|
|
* POR = Power on Reset (VCC H=<2.2v L=>2.2v)
|
|
* FL = Phase Lock (H=lock L=unlock)
|
|
* RD0-2 = Reserved internal operations
|
|
*
|
|
* Only POR can be used to check the tuner is present
|
|
*
|
|
* Caution: after byte2 the I2C reverts to write mode continuing to read
|
|
* may corrupt tuning data.
|
|
*
|
|
*/
|
|
|
|
static int ix2505v_read_status_reg(struct ix2505v_state *state)
|
|
{
|
|
u8 addr = state->config->tuner_address;
|
|
u8 b2[] = {0};
|
|
int ret;
|
|
|
|
struct i2c_msg msg[1] = {
|
|
{ .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 }
|
|
};
|
|
|
|
ret = i2c_transfer(state->i2c, msg, 1);
|
|
deb_i2c("Read %s ", __func__);
|
|
|
|
return (ret == 1) ? (int) b2[0] : -1;
|
|
}
|
|
|
|
static int ix2505v_write(struct ix2505v_state *state, u8 buf[], u8 count)
|
|
{
|
|
struct i2c_msg msg[1] = {
|
|
{ .addr = state->config->tuner_address, .flags = 0,
|
|
.buf = buf, .len = count },
|
|
};
|
|
|
|
int ret;
|
|
|
|
ret = i2c_transfer(state->i2c, msg, 1);
|
|
|
|
if (ret != 1) {
|
|
deb_i2c("%s: i2c error, ret=%d\n", __func__, ret);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ix2505v_release(struct dvb_frontend *fe)
|
|
{
|
|
struct ix2505v_state *state = fe->tuner_priv;
|
|
|
|
fe->tuner_priv = NULL;
|
|
kfree(state);
|
|
|
|
}
|
|
|
|
/*
|
|
* Data write format of the Sharp IX2505V B0017
|
|
*
|
|
* byte1: 1 | 1 | 0 | 0 | 0 | 0(MA1)| 0(MA0)| 0
|
|
* byte2: 0 | BG1 | BG2 | N8 | N7 | N6 | N5 | N4
|
|
* byte3: N3 | N2 | N1 | A5 | A4 | A3 | A2 | A1
|
|
* byte4: 1 | 1(C1) | 1(C0) | PD5 | PD4 | TM | 0(RTS)| 1(REF)
|
|
* byte5: BA2 | BA1 | BA0 | PSC | PD3 |PD2/TS2|DIV/TS1|PD0/TS0
|
|
*
|
|
* byte1 = address
|
|
*
|
|
* Write order
|
|
* 1) byte1 -> byte2 -> byte3 -> byte4 -> byte5
|
|
* 2) byte1 -> byte4 -> byte5 -> byte2 -> byte3
|
|
* 3) byte1 -> byte2 -> byte3 -> byte4
|
|
* 4) byte1 -> byte4 -> byte5 -> byte2
|
|
* 5) byte1 -> byte2 -> byte3
|
|
* 6) byte1 -> byte4 -> byte5
|
|
* 7) byte1 -> byte2
|
|
* 8) byte1 -> byte4
|
|
*
|
|
* Recommended Setup
|
|
* 1 -> 8 -> 6
|
|
*/
|
|
|
|
static int ix2505v_set_params(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
struct ix2505v_state *state = fe->tuner_priv;
|
|
u32 frequency = c->frequency;
|
|
u32 b_w = (c->symbol_rate * 27) / 32000;
|
|
u32 div_factor, N , A, x;
|
|
int ret = 0, len;
|
|
u8 gain, cc, ref, psc, local_osc, lpf;
|
|
u8 data[4] = {0};
|
|
|
|
if ((frequency < fe->ops.info.frequency_min_hz / kHz)
|
|
|| (frequency > fe->ops.info.frequency_max_hz / kHz))
|
|
return -EINVAL;
|
|
|
|
if (state->config->tuner_gain)
|
|
gain = (state->config->tuner_gain < 4)
|
|
? state->config->tuner_gain : 0;
|
|
else
|
|
gain = 0x0;
|
|
|
|
if (state->config->tuner_chargepump)
|
|
cc = state->config->tuner_chargepump;
|
|
else
|
|
cc = 0x3;
|
|
|
|
ref = 8; /* REF =1 */
|
|
psc = 32; /* PSC = 0 */
|
|
|
|
div_factor = (frequency * ref) / 40; /* local osc = 4Mhz */
|
|
x = div_factor / psc;
|
|
N = x/100;
|
|
A = ((x - (N * 100)) * psc) / 100;
|
|
|
|
data[0] = ((gain & 0x3) << 5) | (N >> 3);
|
|
data[1] = (N << 5) | (A & 0x1f);
|
|
data[2] = 0x81 | ((cc & 0x3) << 5) ; /*PD5,PD4 & TM = 0|C1,C0|REF=1*/
|
|
|
|
deb_info("Frq=%d x=%d N=%d A=%d\n", frequency, x, N, A);
|
|
|
|
if (frequency <= 1065000)
|
|
local_osc = (6 << 5) | 2;
|
|
else if (frequency <= 1170000)
|
|
local_osc = (7 << 5) | 2;
|
|
else if (frequency <= 1300000)
|
|
local_osc = (1 << 5);
|
|
else if (frequency <= 1445000)
|
|
local_osc = (2 << 5);
|
|
else if (frequency <= 1607000)
|
|
local_osc = (3 << 5);
|
|
else if (frequency <= 1778000)
|
|
local_osc = (4 << 5);
|
|
else if (frequency <= 1942000)
|
|
local_osc = (5 << 5);
|
|
else /*frequency up to 2150000*/
|
|
local_osc = (6 << 5);
|
|
|
|
data[3] = local_osc; /* all other bits set 0 */
|
|
|
|
if (b_w <= 10000)
|
|
lpf = 0xc;
|
|
else if (b_w <= 12000)
|
|
lpf = 0x2;
|
|
else if (b_w <= 14000)
|
|
lpf = 0xa;
|
|
else if (b_w <= 16000)
|
|
lpf = 0x6;
|
|
else if (b_w <= 18000)
|
|
lpf = 0xe;
|
|
else if (b_w <= 20000)
|
|
lpf = 0x1;
|
|
else if (b_w <= 22000)
|
|
lpf = 0x9;
|
|
else if (b_w <= 24000)
|
|
lpf = 0x5;
|
|
else if (b_w <= 26000)
|
|
lpf = 0xd;
|
|
else if (b_w <= 28000)
|
|
lpf = 0x3;
|
|
else
|
|
lpf = 0xb;
|
|
|
|
deb_info("Osc=%x b_w=%x lpf=%x\n", local_osc, b_w, lpf);
|
|
deb_info("Data 0=[%4phN]\n", data);
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
len = sizeof(data);
|
|
ret |= ix2505v_write(state, data, len);
|
|
|
|
data[2] |= 0x4; /* set TM = 1 other bits same */
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
len = 1;
|
|
ret |= ix2505v_write(state, &data[2], len); /* write byte 4 only */
|
|
|
|
msleep(10);
|
|
|
|
data[2] |= ((lpf >> 2) & 0x3) << 3; /* lpf */
|
|
data[3] |= (lpf & 0x3) << 2;
|
|
|
|
deb_info("Data 2=[%x%x]\n", data[2], data[3]);
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
len = 2;
|
|
ret |= ix2505v_write(state, &data[2], len); /* write byte 4 & 5 */
|
|
|
|
if (state->config->min_delay_ms)
|
|
msleep(state->config->min_delay_ms);
|
|
|
|
state->frequency = frequency;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ix2505v_get_frequency(struct dvb_frontend *fe, u32 *frequency)
|
|
{
|
|
struct ix2505v_state *state = fe->tuner_priv;
|
|
|
|
*frequency = state->frequency;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dvb_tuner_ops ix2505v_tuner_ops = {
|
|
.info = {
|
|
.name = "Sharp IX2505V (B0017)",
|
|
.frequency_min_hz = 950 * MHz,
|
|
.frequency_max_hz = 2175 * MHz
|
|
},
|
|
.release = ix2505v_release,
|
|
.set_params = ix2505v_set_params,
|
|
.get_frequency = ix2505v_get_frequency,
|
|
};
|
|
|
|
struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe,
|
|
const struct ix2505v_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct ix2505v_state *state = NULL;
|
|
int ret;
|
|
|
|
if (NULL == config) {
|
|
deb_i2c("%s: no config ", __func__);
|
|
goto error;
|
|
}
|
|
|
|
state = kzalloc(sizeof(struct ix2505v_state), GFP_KERNEL);
|
|
if (NULL == state)
|
|
return NULL;
|
|
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
|
|
if (state->config->tuner_write_only) {
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
ret = ix2505v_read_status_reg(state);
|
|
|
|
if (ret & 0x80) {
|
|
deb_i2c("%s: No IX2505V found\n", __func__);
|
|
goto error;
|
|
}
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
}
|
|
|
|
fe->tuner_priv = state;
|
|
|
|
memcpy(&fe->ops.tuner_ops, &ix2505v_tuner_ops,
|
|
sizeof(struct dvb_tuner_ops));
|
|
deb_i2c("%s: initialization (%s addr=0x%02x) ok\n",
|
|
__func__, fe->ops.tuner_ops.info.name, config->tuner_address);
|
|
|
|
return fe;
|
|
|
|
error:
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ix2505v_attach);
|
|
|
|
module_param_named(debug, ix2505v_debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
|
|
MODULE_DESCRIPTION("DVB IX2505V tuner driver");
|
|
MODULE_AUTHOR("Malcolm Priestley");
|
|
MODULE_LICENSE("GPL");
|