Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Allegro A8293 SEC driver |
| 3 | * |
| 4 | * Copyright (C) 2011 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 "dvb_frontend.h" |
| 22 | #include "a8293.h" |
| 23 | |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 24 | struct a8293_priv { |
Antti Palosaari | b561bae | 2015-04-16 13:28:39 -0300 | [diff] [blame^] | 25 | u8 i2c_addr; |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 26 | struct i2c_adapter *i2c; |
Antti Palosaari | b561bae | 2015-04-16 13:28:39 -0300 | [diff] [blame^] | 27 | struct i2c_client *client; |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 28 | u8 reg[2]; |
| 29 | }; |
| 30 | |
| 31 | static int a8293_i2c(struct a8293_priv *priv, u8 *val, int len, bool rd) |
| 32 | { |
| 33 | int ret; |
| 34 | struct i2c_msg msg[1] = { |
| 35 | { |
Antti Palosaari | b561bae | 2015-04-16 13:28:39 -0300 | [diff] [blame^] | 36 | .addr = priv->i2c_addr, |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 37 | .len = len, |
| 38 | .buf = val, |
| 39 | } |
| 40 | }; |
| 41 | |
| 42 | if (rd) |
| 43 | msg[0].flags = I2C_M_RD; |
| 44 | else |
| 45 | msg[0].flags = 0; |
| 46 | |
| 47 | ret = i2c_transfer(priv->i2c, msg, 1); |
| 48 | if (ret == 1) { |
| 49 | ret = 0; |
| 50 | } else { |
Antti Palosaari | acc4e82 | 2012-07-02 05:13:58 -0300 | [diff] [blame] | 51 | dev_warn(&priv->i2c->dev, "%s: i2c failed=%d rd=%d\n", |
| 52 | KBUILD_MODNAME, ret, rd); |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 53 | ret = -EREMOTEIO; |
| 54 | } |
| 55 | |
| 56 | return ret; |
| 57 | } |
| 58 | |
| 59 | static int a8293_wr(struct a8293_priv *priv, u8 *val, int len) |
| 60 | { |
| 61 | return a8293_i2c(priv, val, len, 0); |
| 62 | } |
| 63 | |
| 64 | static int a8293_rd(struct a8293_priv *priv, u8 *val, int len) |
| 65 | { |
| 66 | return a8293_i2c(priv, val, len, 1); |
| 67 | } |
| 68 | |
| 69 | static int a8293_set_voltage(struct dvb_frontend *fe, |
| 70 | fe_sec_voltage_t fe_sec_voltage) |
| 71 | { |
| 72 | struct a8293_priv *priv = fe->sec_priv; |
| 73 | int ret; |
| 74 | |
Antti Palosaari | acc4e82 | 2012-07-02 05:13:58 -0300 | [diff] [blame] | 75 | dev_dbg(&priv->i2c->dev, "%s: fe_sec_voltage=%d\n", __func__, |
| 76 | fe_sec_voltage); |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 77 | |
| 78 | switch (fe_sec_voltage) { |
| 79 | case SEC_VOLTAGE_OFF: |
| 80 | /* ENB=0 */ |
| 81 | priv->reg[0] = 0x10; |
| 82 | break; |
| 83 | case SEC_VOLTAGE_13: |
| 84 | /* VSEL0=1, VSEL1=0, VSEL2=0, VSEL3=0, ENB=1*/ |
| 85 | priv->reg[0] = 0x31; |
| 86 | break; |
| 87 | case SEC_VOLTAGE_18: |
| 88 | /* VSEL0=0, VSEL1=0, VSEL2=0, VSEL3=1, ENB=1*/ |
| 89 | priv->reg[0] = 0x38; |
| 90 | break; |
| 91 | default: |
| 92 | ret = -EINVAL; |
| 93 | goto err; |
Peter Senna Tschudin | c2c1b41 | 2012-09-28 05:37:22 -0300 | [diff] [blame] | 94 | } |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 95 | |
| 96 | ret = a8293_wr(priv, &priv->reg[0], 1); |
| 97 | if (ret) |
| 98 | goto err; |
| 99 | |
Antti Palosaari | c0ec1c4 | 2013-02-25 08:24:18 -0300 | [diff] [blame] | 100 | usleep_range(1500, 50000); |
| 101 | |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 102 | return ret; |
| 103 | err: |
Antti Palosaari | acc4e82 | 2012-07-02 05:13:58 -0300 | [diff] [blame] | 104 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 105 | return ret; |
| 106 | } |
| 107 | |
| 108 | static void a8293_release_sec(struct dvb_frontend *fe) |
| 109 | { |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 110 | a8293_set_voltage(fe, SEC_VOLTAGE_OFF); |
| 111 | |
| 112 | kfree(fe->sec_priv); |
| 113 | fe->sec_priv = NULL; |
| 114 | } |
| 115 | |
| 116 | struct dvb_frontend *a8293_attach(struct dvb_frontend *fe, |
| 117 | struct i2c_adapter *i2c, const struct a8293_config *cfg) |
| 118 | { |
| 119 | int ret; |
| 120 | struct a8293_priv *priv = NULL; |
| 121 | u8 buf[2]; |
| 122 | |
| 123 | /* allocate memory for the internal priv */ |
| 124 | priv = kzalloc(sizeof(struct a8293_priv), GFP_KERNEL); |
| 125 | if (priv == NULL) { |
| 126 | ret = -ENOMEM; |
| 127 | goto err; |
| 128 | } |
| 129 | |
| 130 | /* setup the priv */ |
| 131 | priv->i2c = i2c; |
Antti Palosaari | b561bae | 2015-04-16 13:28:39 -0300 | [diff] [blame^] | 132 | priv->i2c_addr = cfg->i2c_addr; |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 133 | fe->sec_priv = priv; |
| 134 | |
| 135 | /* check if the SEC is there */ |
| 136 | ret = a8293_rd(priv, buf, 2); |
| 137 | if (ret) |
| 138 | goto err; |
| 139 | |
| 140 | /* ENB=0 */ |
| 141 | priv->reg[0] = 0x10; |
Antti Palosaari | f3e16df | 2012-07-02 04:45:53 -0300 | [diff] [blame] | 142 | ret = a8293_wr(priv, &priv->reg[0], 1); |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 143 | if (ret) |
| 144 | goto err; |
| 145 | |
| 146 | /* TMODE=0, TGATE=1 */ |
| 147 | priv->reg[1] = 0x82; |
| 148 | ret = a8293_wr(priv, &priv->reg[1], 1); |
| 149 | if (ret) |
| 150 | goto err; |
| 151 | |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 152 | fe->ops.release_sec = a8293_release_sec; |
| 153 | |
| 154 | /* override frontend ops */ |
| 155 | fe->ops.set_voltage = a8293_set_voltage; |
| 156 | |
Antti Palosaari | acc4e82 | 2012-07-02 05:13:58 -0300 | [diff] [blame] | 157 | dev_info(&priv->i2c->dev, "%s: Allegro A8293 SEC attached\n", |
| 158 | KBUILD_MODNAME); |
| 159 | |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 160 | return fe; |
| 161 | err: |
Antti Palosaari | acc4e82 | 2012-07-02 05:13:58 -0300 | [diff] [blame] | 162 | dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret); |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 163 | kfree(priv); |
| 164 | return NULL; |
| 165 | } |
| 166 | EXPORT_SYMBOL(a8293_attach); |
| 167 | |
Antti Palosaari | b561bae | 2015-04-16 13:28:39 -0300 | [diff] [blame^] | 168 | static int a8293_probe(struct i2c_client *client, |
| 169 | const struct i2c_device_id *id) |
| 170 | { |
| 171 | struct a8293_priv *dev; |
| 172 | struct a8293_platform_data *pdata = client->dev.platform_data; |
| 173 | struct dvb_frontend *fe = pdata->dvb_frontend; |
| 174 | int ret; |
| 175 | u8 buf[2]; |
| 176 | |
| 177 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 178 | if (!dev) { |
| 179 | ret = -ENOMEM; |
| 180 | goto err; |
| 181 | } |
| 182 | |
| 183 | dev->client = client; |
| 184 | dev->i2c = client->adapter; |
| 185 | dev->i2c_addr = client->addr; |
| 186 | |
| 187 | /* check if the SEC is there */ |
| 188 | ret = a8293_rd(dev, buf, 2); |
| 189 | if (ret) |
| 190 | goto err_kfree; |
| 191 | |
| 192 | /* ENB=0 */ |
| 193 | dev->reg[0] = 0x10; |
| 194 | ret = a8293_wr(dev, &dev->reg[0], 1); |
| 195 | if (ret) |
| 196 | goto err_kfree; |
| 197 | |
| 198 | /* TMODE=0, TGATE=1 */ |
| 199 | dev->reg[1] = 0x82; |
| 200 | ret = a8293_wr(dev, &dev->reg[1], 1); |
| 201 | if (ret) |
| 202 | goto err_kfree; |
| 203 | |
| 204 | /* override frontend ops */ |
| 205 | fe->ops.set_voltage = a8293_set_voltage; |
| 206 | |
| 207 | fe->sec_priv = dev; |
| 208 | i2c_set_clientdata(client, dev); |
| 209 | |
| 210 | dev_info(&client->dev, "Allegro A8293 SEC successfully attached\n"); |
| 211 | return 0; |
| 212 | err_kfree: |
| 213 | kfree(dev); |
| 214 | err: |
| 215 | dev_dbg(&client->dev, "failed=%d\n", ret); |
| 216 | return ret; |
| 217 | } |
| 218 | |
| 219 | static int a8293_remove(struct i2c_client *client) |
| 220 | { |
| 221 | struct a8293_dev *dev = i2c_get_clientdata(client); |
| 222 | |
| 223 | dev_dbg(&client->dev, "\n"); |
| 224 | |
| 225 | kfree(dev); |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | static const struct i2c_device_id a8293_id_table[] = { |
| 230 | {"a8293", 0}, |
| 231 | {} |
| 232 | }; |
| 233 | MODULE_DEVICE_TABLE(i2c, a8293_id_table); |
| 234 | |
| 235 | static struct i2c_driver a8293_driver = { |
| 236 | .driver = { |
| 237 | .owner = THIS_MODULE, |
| 238 | .name = "a8293", |
| 239 | .suppress_bind_attrs = true, |
| 240 | }, |
| 241 | .probe = a8293_probe, |
| 242 | .remove = a8293_remove, |
| 243 | .id_table = a8293_id_table, |
| 244 | }; |
| 245 | |
| 246 | module_i2c_driver(a8293_driver); |
| 247 | |
Antti Palosaari | 85bc9b5 | 2011-08-01 00:52:11 -0300 | [diff] [blame] | 248 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| 249 | MODULE_DESCRIPTION("Allegro A8293 SEC driver"); |
| 250 | MODULE_LICENSE("GPL"); |