^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) Driver for Philips tda8262/tda8263 DVBS Silicon tuners
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) (c) 2006 Andrew de Quincey
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/dvb/frontend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "tda826x.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int debug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define dprintk(args...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) if (debug) printk(KERN_DEBUG "tda826x: " args); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct tda826x_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* i2c details */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int i2c_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct i2c_adapter *i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) u8 has_loopthrough:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u32 frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static void tda826x_release(struct dvb_frontend *fe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) kfree(fe->tuner_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) fe->tuner_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int tda826x_sleep(struct dvb_frontend *fe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct tda826x_priv *priv = fe->tuner_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u8 buf [] = { 0x00, 0x8d };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 2 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) dprintk("%s:\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!priv->has_loopthrough)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) buf[1] = 0xad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (fe->ops.i2c_gate_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) fe->ops.i2c_gate_ctrl(fe, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) dprintk("%s: i2c error\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (fe->ops.i2c_gate_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) fe->ops.i2c_gate_ctrl(fe, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return (ret == 1) ? 0 : ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int tda826x_set_params(struct dvb_frontend *fe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct dtv_frontend_properties *p = &fe->dtv_property_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct tda826x_priv *priv = fe->tuner_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u32 div;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u32 ksyms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u32 bandwidth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u8 buf [11];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 11 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) dprintk("%s:\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) div = (p->frequency + (1000-1)) / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* BW = ((1 + RO) * SR/2 + 5) * 1.3 [SR in MSPS, BW in MHz] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* with R0 = 0.35 and some transformations: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ksyms = p->symbol_rate / 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) bandwidth = (878 * ksyms + 6500000) / 1000000 + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (bandwidth < 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) bandwidth = 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) else if (bandwidth > 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) bandwidth = 36;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) buf[0] = 0x00; // subaddress
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) buf[1] = 0x09; // powerdown RSSI + the magic value 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!priv->has_loopthrough)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) buf[1] |= 0x20; // power down loopthrough if not needed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) buf[2] = (1<<5) | 0x0b; // 1Mhz + 0.45 VCO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) buf[3] = div >> 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) buf[4] = div << 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) buf[5] = ((bandwidth - 5) << 3) | 7; /* baseband cut-off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) buf[6] = 0xfe; // baseband gain 9 db + no RF attenuation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) buf[7] = 0x83; // charge pumps at high, tests off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) buf[8] = 0x80; // recommended value 4 for AMPVCO + disable ports.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) buf[9] = 0x1a; // normal caltime + recommended values for SELTH + SELVTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) buf[10] = 0xd4; // recommended value 13 for BBIAS + unknown bit set on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (fe->ops.i2c_gate_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) fe->ops.i2c_gate_ctrl(fe, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) dprintk("%s: i2c error\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (fe->ops.i2c_gate_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) fe->ops.i2c_gate_ctrl(fe, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) priv->frequency = div * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return (ret == 1) ? 0 : ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int tda826x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct tda826x_priv *priv = fe->tuner_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) *frequency = priv->frequency;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static const struct dvb_tuner_ops tda826x_tuner_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .name = "Philips TDA826X",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .frequency_min_hz = 950 * MHz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .frequency_max_hz = 2175 * MHz
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .release = tda826x_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .sleep = tda826x_sleep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .set_params = tda826x_set_params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .get_frequency = tda826x_get_frequency,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c, int has_loopthrough)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct tda826x_priv *priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) u8 b1 [] = { 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct i2c_msg msg[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) { .addr = addr, .flags = 0, .buf = NULL, .len = 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dprintk("%s:\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (fe->ops.i2c_gate_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) fe->ops.i2c_gate_ctrl(fe, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ret = i2c_transfer (i2c, msg, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (fe->ops.i2c_gate_ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) fe->ops.i2c_gate_ctrl(fe, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (ret != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (!(b1[1] & 0x80))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) priv = kzalloc(sizeof(struct tda826x_priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (priv == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) priv->i2c_address = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) priv->i2c = i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) priv->has_loopthrough = has_loopthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) memcpy(&fe->ops.tuner_ops, &tda826x_tuner_ops, sizeof(struct dvb_tuner_ops));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) fe->tuner_priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return fe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) EXPORT_SYMBOL(tda826x_attach);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) module_param(debug, int, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) MODULE_DESCRIPTION("DVB TDA826x driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) MODULE_AUTHOR("Andrew de Quincey");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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