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