| Michael Krufky | 76db93d | 2006-11-19 19:45:26 -0300 | [diff] [blame^] | 1 | /* |
| 2 | * lgh06xf.c - ATSC Tuner support for LG TDVS-H06xF |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
| 19 | #include "dvb-pll.h" |
| 20 | #include "lgh06xf.h" |
| 21 | |
| 22 | #define LG_H06XF_PLL_I2C_ADDR 0x61 |
| 23 | |
| 24 | struct lgh06xf_priv { |
| 25 | struct i2c_adapter *i2c; |
| 26 | u32 frequency; |
| 27 | }; |
| 28 | |
| 29 | static int lgh06xf_release(struct dvb_frontend *fe) |
| 30 | { |
| 31 | kfree(fe->tuner_priv); |
| 32 | fe->tuner_priv = NULL; |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | static int lgh06xf_set_params(struct dvb_frontend* fe, |
| 37 | struct dvb_frontend_parameters* params) |
| 38 | { |
| 39 | struct lgh06xf_priv *priv = fe->tuner_priv; |
| 40 | u8 buf[4]; |
| 41 | struct i2c_msg msg = { .addr = LG_H06XF_PLL_I2C_ADDR, .flags = 0, |
| 42 | .buf = buf, .len = sizeof(buf) }; |
| 43 | u32 div; |
| 44 | int i; |
| 45 | int err; |
| 46 | |
| 47 | dvb_pll_configure(&dvb_pll_lg_tdvs_h06xf, buf, params->frequency, 0); |
| 48 | if (fe->ops.i2c_gate_ctrl) |
| 49 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 50 | if ((err = i2c_transfer(priv->i2c, &msg, 1)) != 1) { |
| 51 | printk(KERN_WARNING "lgh06xf: %s error " |
| 52 | "(addr %02x <- %02x, err = %i)\n", |
| 53 | __FUNCTION__, buf[0], buf[1], err); |
| 54 | if (err < 0) |
| 55 | return err; |
| 56 | else |
| 57 | return -EREMOTEIO; |
| 58 | } |
| 59 | |
| 60 | /* Set the Auxiliary Byte. */ |
| 61 | buf[0] = buf[2]; |
| 62 | buf[0] &= ~0x20; |
| 63 | buf[0] |= 0x18; |
| 64 | buf[1] = 0x50; |
| 65 | msg.len = 2; |
| 66 | if (fe->ops.i2c_gate_ctrl) |
| 67 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 68 | if ((err = i2c_transfer(priv->i2c, &msg, 1)) != 1) { |
| 69 | printk(KERN_WARNING "lgh06xf: %s error " |
| 70 | "(addr %02x <- %02x, err = %i)\n", |
| 71 | __FUNCTION__, buf[0], buf[1], err); |
| 72 | if (err < 0) |
| 73 | return err; |
| 74 | else |
| 75 | return -EREMOTEIO; |
| 76 | } |
| 77 | |
| 78 | // calculate the frequency we set it to |
| 79 | for (i = 0; i < dvb_pll_lg_tdvs_h06xf.count; i++) { |
| 80 | if (params->frequency > dvb_pll_lg_tdvs_h06xf.entries[i].limit) |
| 81 | continue; |
| 82 | break; |
| 83 | } |
| 84 | div = (params->frequency + dvb_pll_lg_tdvs_h06xf.entries[i].offset) / |
| 85 | dvb_pll_lg_tdvs_h06xf.entries[i].stepsize; |
| 86 | priv->frequency = (div * dvb_pll_lg_tdvs_h06xf.entries[i].stepsize) - |
| 87 | dvb_pll_lg_tdvs_h06xf.entries[i].offset; |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | static int lgh06xf_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
| 93 | { |
| 94 | struct lgh06xf_priv *priv = fe->tuner_priv; |
| 95 | *frequency = priv->frequency; |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static struct dvb_tuner_ops lgh06xf_tuner_ops = { |
| 100 | .release = lgh06xf_release, |
| 101 | .set_params = lgh06xf_set_params, |
| 102 | .get_frequency = lgh06xf_get_frequency, |
| 103 | }; |
| 104 | |
| 105 | struct dvb_frontend* lgh06xf_attach(struct dvb_frontend *fe, |
| 106 | struct i2c_adapter *i2c) |
| 107 | { |
| 108 | struct lgh06xf_priv *priv = NULL; |
| 109 | |
| 110 | priv = kzalloc(sizeof(struct lgh06xf_priv), GFP_KERNEL); |
| 111 | if (priv == NULL) |
| 112 | return NULL; |
| 113 | |
| 114 | priv->i2c = i2c; |
| 115 | |
| 116 | memcpy(&fe->ops.tuner_ops, &lgh06xf_tuner_ops, |
| 117 | sizeof(struct dvb_tuner_ops)); |
| 118 | |
| 119 | strlcpy(fe->ops.tuner_ops.info.name, dvb_pll_lg_tdvs_h06xf.name, |
| 120 | sizeof(fe->ops.tuner_ops.info.name)); |
| 121 | |
| 122 | fe->ops.tuner_ops.info.frequency_min = dvb_pll_lg_tdvs_h06xf.min; |
| 123 | fe->ops.tuner_ops.info.frequency_max = dvb_pll_lg_tdvs_h06xf.max; |
| 124 | |
| 125 | fe->tuner_priv = priv; |
| 126 | return fe; |
| 127 | } |
| 128 | |
| 129 | EXPORT_SYMBOL(lgh06xf_attach); |
| 130 | |
| 131 | MODULE_DESCRIPTION("LG TDVS-H06xF ATSC Tuner support"); |
| 132 | MODULE_AUTHOR("Michael Krufky"); |
| 133 | MODULE_LICENSE("GPL"); |
| 134 | |
| 135 | /* |
| 136 | * Local variables: |
| 137 | * c-basic-offset: 8 |
| 138 | * End: |
| 139 | */ |