Antti Palosaari | f926374 | 2012-03-30 06:37:26 -0300 | [diff] [blame^] | 1 | /* |
| 2 | * Infineon TUA 9001 silicon tuner driver |
| 3 | * |
| 4 | * Copyright (C) 2009 Antti Palosaari <crope@iki.fi> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | */ |
| 20 | |
| 21 | #include "tua9001.h" |
| 22 | #include "tua9001_priv.h" |
| 23 | |
| 24 | /* write register */ |
| 25 | static int tua9001_wr_reg(struct tua9001_priv *priv, u8 reg, u16 val) |
| 26 | { |
| 27 | int ret; |
| 28 | u8 buf[3] = { reg, (val >> 8) & 0xff, (val >> 0) & 0xff }; |
| 29 | struct i2c_msg msg[1] = { |
| 30 | { |
| 31 | .addr = priv->cfg->i2c_addr, |
| 32 | .flags = 0, |
| 33 | .len = sizeof(buf), |
| 34 | .buf = buf, |
| 35 | } |
| 36 | }; |
| 37 | |
| 38 | ret = i2c_transfer(priv->i2c, msg, 1); |
| 39 | if (ret == 1) { |
| 40 | ret = 0; |
| 41 | } else { |
| 42 | printk(KERN_WARNING "%s: I2C wr failed=%d reg=%02x\n", |
| 43 | __func__, ret, reg); |
| 44 | ret = -EREMOTEIO; |
| 45 | } |
| 46 | |
| 47 | return ret; |
| 48 | } |
| 49 | |
| 50 | static int tua9001_release(struct dvb_frontend *fe) |
| 51 | { |
| 52 | kfree(fe->tuner_priv); |
| 53 | fe->tuner_priv = NULL; |
| 54 | |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | static int tua9001_init(struct dvb_frontend *fe) |
| 59 | { |
| 60 | struct tua9001_priv *priv = fe->tuner_priv; |
| 61 | int ret = 0; |
| 62 | u8 i; |
| 63 | struct reg_val data[] = { |
| 64 | { 0x1e, 0x6512 }, |
| 65 | { 0x25, 0xb888 }, |
| 66 | { 0x39, 0x5460 }, |
| 67 | { 0x3b, 0x00c0 }, |
| 68 | { 0x3a, 0xf000 }, |
| 69 | { 0x08, 0x0000 }, |
| 70 | { 0x32, 0x0030 }, |
| 71 | { 0x41, 0x703a }, |
| 72 | { 0x40, 0x1c78 }, |
| 73 | { 0x2c, 0x1c00 }, |
| 74 | { 0x36, 0xc013 }, |
| 75 | { 0x37, 0x6f18 }, |
| 76 | { 0x27, 0x0008 }, |
| 77 | { 0x2a, 0x0001 }, |
| 78 | { 0x34, 0x0a40 }, |
| 79 | }; |
| 80 | |
| 81 | if (fe->ops.i2c_gate_ctrl) |
| 82 | fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c-gate */ |
| 83 | |
| 84 | for (i = 0; i < ARRAY_SIZE(data); i++) { |
| 85 | ret = tua9001_wr_reg(priv, data[i].reg, data[i].val); |
| 86 | if (ret) |
| 87 | break; |
| 88 | } |
| 89 | |
| 90 | if (fe->ops.i2c_gate_ctrl) |
| 91 | fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c-gate */ |
| 92 | |
| 93 | if (ret < 0) |
| 94 | pr_debug("%s: failed=%d\n", __func__, ret); |
| 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | static int tua9001_set_params(struct dvb_frontend *fe) |
| 100 | { |
| 101 | struct tua9001_priv *priv = fe->tuner_priv; |
| 102 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| 103 | int ret, i; |
| 104 | u16 val; |
| 105 | u32 frequency; |
| 106 | struct reg_val data[2]; |
| 107 | |
| 108 | pr_debug("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n", |
| 109 | __func__, c->delivery_system, c->frequency, |
| 110 | c->bandwidth_hz); |
| 111 | |
| 112 | switch (c->delivery_system) { |
| 113 | case SYS_DVBT: |
| 114 | switch (c->bandwidth_hz) { |
| 115 | case 8000000: |
| 116 | val = 0x0000; |
| 117 | break; |
| 118 | case 7000000: |
| 119 | val = 0x1000; |
| 120 | break; |
| 121 | case 6000000: |
| 122 | val = 0x2000; |
| 123 | break; |
| 124 | case 5000000: |
| 125 | val = 0x3000; |
| 126 | break; |
| 127 | default: |
| 128 | ret = -EINVAL; |
| 129 | goto err; |
| 130 | } |
| 131 | break; |
| 132 | default: |
| 133 | ret = -EINVAL; |
| 134 | goto err; |
| 135 | } |
| 136 | |
| 137 | data[0].reg = 0x04; |
| 138 | data[0].val = val; |
| 139 | |
| 140 | frequency = (c->frequency - 150000000); |
| 141 | frequency /= 100; |
| 142 | frequency *= 48; |
| 143 | frequency /= 10000; |
| 144 | |
| 145 | data[1].reg = 0x1f; |
| 146 | data[1].val = frequency; |
| 147 | |
| 148 | if (fe->ops.i2c_gate_ctrl) |
| 149 | fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c-gate */ |
| 150 | |
| 151 | for (i = 0; i < ARRAY_SIZE(data); i++) { |
| 152 | ret = tua9001_wr_reg(priv, data[i].reg, data[i].val); |
| 153 | if (ret < 0) |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | if (fe->ops.i2c_gate_ctrl) |
| 158 | fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c-gate */ |
| 159 | |
| 160 | err: |
| 161 | if (ret < 0) |
| 162 | pr_debug("%s: failed=%d\n", __func__, ret); |
| 163 | |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | static int tua9001_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
| 168 | { |
| 169 | *frequency = 0; /* Zero-IF */ |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static const struct dvb_tuner_ops tua9001_tuner_ops = { |
| 175 | .info = { |
| 176 | .name = "Infineon TUA 9001", |
| 177 | |
| 178 | .frequency_min = 170000000, |
| 179 | .frequency_max = 862000000, |
| 180 | .frequency_step = 0, |
| 181 | }, |
| 182 | |
| 183 | .release = tua9001_release, |
| 184 | |
| 185 | .init = tua9001_init, |
| 186 | .set_params = tua9001_set_params, |
| 187 | |
| 188 | .get_if_frequency = tua9001_get_if_frequency, |
| 189 | }; |
| 190 | |
| 191 | struct dvb_frontend *tua9001_attach(struct dvb_frontend *fe, |
| 192 | struct i2c_adapter *i2c, struct tua9001_config *cfg) |
| 193 | { |
| 194 | struct tua9001_priv *priv = NULL; |
| 195 | |
| 196 | priv = kzalloc(sizeof(struct tua9001_priv), GFP_KERNEL); |
| 197 | if (priv == NULL) |
| 198 | return NULL; |
| 199 | |
| 200 | priv->cfg = cfg; |
| 201 | priv->i2c = i2c; |
| 202 | |
| 203 | printk(KERN_INFO "Infineon TUA 9001 successfully attached."); |
| 204 | |
| 205 | memcpy(&fe->ops.tuner_ops, &tua9001_tuner_ops, |
| 206 | sizeof(struct dvb_tuner_ops)); |
| 207 | |
| 208 | fe->tuner_priv = priv; |
| 209 | return fe; |
| 210 | } |
| 211 | EXPORT_SYMBOL(tua9001_attach); |
| 212 | |
| 213 | MODULE_DESCRIPTION("Infineon TUA 9001 silicon tuner driver"); |
| 214 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| 215 | MODULE_LICENSE("GPL"); |