diff options
author | Devin Heitmueller <dheitmueller@linuxtv.org> | 2009-03-11 02:59:30 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:24 -0300 |
commit | f56738cd81690dcaec92307b1a7f9f5f69af15b1 (patch) | |
tree | 9cd288204504cb6f29c6f69a403a385b50cfe97c /drivers/media/dvb/frontends/au8522_dig.c | |
parent | ea2278633ab4728c41b4043f47df4d3e39131992 (diff) |
V4L/DVB (11060): au8522: rename the au8522.c source file
Rename the au8522.c file to au8522_dig.c so that more source files can be
added to the driver while preserving the original name of au8522.ko
Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth
<stoth@linuxtv.org> for providing sample hardware, engineering level support,
and testing.
Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb/frontends/au8522_dig.c')
-rw-r--r-- | drivers/media/dvb/frontends/au8522_dig.c | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/au8522_dig.c b/drivers/media/dvb/frontends/au8522_dig.c new file mode 100644 index 00000000000..eabf9a68e7e --- /dev/null +++ b/drivers/media/dvb/frontends/au8522_dig.c @@ -0,0 +1,874 @@ +/* + Auvitek AU8522 QAM/8VSB demodulator driver + + Copyright (C) 2008 Steven Toth <stoth@linuxtv.org> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include "dvb_frontend.h" +#include "au8522.h" + +struct au8522_state { + + struct i2c_adapter *i2c; + + /* configuration settings */ + const struct au8522_config *config; + + struct dvb_frontend frontend; + + u32 current_frequency; + fe_modulation_t current_modulation; + + u32 fe_status; + unsigned int led_state; +}; + +static int debug; + +#define dprintk(arg...) do { \ + if (debug) \ + printk(arg); \ + } while (0) + +/* 16 bit registers, 8 bit values */ +static int au8522_writereg(struct au8522_state *state, u16 reg, u8 data) +{ + int ret; + u8 buf [] = { reg >> 8, reg & 0xff, data }; + + struct i2c_msg msg = { .addr = state->config->demod_address, + .flags = 0, .buf = buf, .len = 3 }; + + ret = i2c_transfer(state->i2c, &msg, 1); + + if (ret != 1) + printk("%s: writereg error (reg == 0x%02x, val == 0x%04x, " + "ret == %i)\n", __func__, reg, data, ret); + + return (ret != 1) ? -1 : 0; +} + +static u8 au8522_readreg(struct au8522_state *state, u16 reg) +{ + int ret; + u8 b0 [] = { reg >> 8, reg & 0xff }; + u8 b1 [] = { 0 }; + + struct i2c_msg msg [] = { + { .addr = state->config->demod_address, .flags = 0, + .buf = b0, .len = 2 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, + .buf = b1, .len = 1 } }; + + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) + printk(KERN_ERR "%s: readreg error (ret == %i)\n", + __func__, ret); + return b1[0]; +} + +static int au8522_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +{ + struct au8522_state *state = fe->demodulator_priv; + + dprintk("%s(%d)\n", __func__, enable); + + if (enable) + return au8522_writereg(state, 0x106, 1); + else + return au8522_writereg(state, 0x106, 0); +} + +struct mse2snr_tab { + u16 val; + u16 data; +}; + +/* VSB SNR lookup table */ +static struct mse2snr_tab vsb_mse2snr_tab[] = { + { 0, 270 }, + { 2, 250 }, + { 3, 240 }, + { 5, 230 }, + { 7, 220 }, + { 9, 210 }, + { 12, 200 }, + { 13, 195 }, + { 15, 190 }, + { 17, 185 }, + { 19, 180 }, + { 21, 175 }, + { 24, 170 }, + { 27, 165 }, + { 31, 160 }, + { 32, 158 }, + { 33, 156 }, + { 36, 152 }, + { 37, 150 }, + { 39, 148 }, + { 40, 146 }, + { 41, 144 }, + { 43, 142 }, + { 44, 140 }, + { 48, 135 }, + { 50, 130 }, + { 43, 142 }, + { 53, 125 }, + { 56, 120 }, + { 256, 115 }, +}; + +/* QAM64 SNR lookup table */ +static struct mse2snr_tab qam64_mse2snr_tab[] = { + { 15, 0 }, + { 16, 290 }, + { 17, 288 }, + { 18, 286 }, + { 19, 284 }, + { 20, 282 }, + { 21, 281 }, + { 22, 279 }, + { 23, 277 }, + { 24, 275 }, + { 25, 273 }, + { 26, 271 }, + { 27, 269 }, + { 28, 268 }, + { 29, 266 }, + { 30, 264 }, + { 31, 262 }, + { 32, 260 }, + { 33, 259 }, + { 34, 258 }, + { 35, 256 }, + { 36, 255 }, + { 37, 254 }, + { 38, 252 }, + { 39, 251 }, + { 40, 250 }, + { 41, 249 }, + { 42, 248 }, + { 43, 246 }, + { 44, 245 }, + { 45, 244 }, + { 46, 242 }, + { 47, 241 }, + { 48, 240 }, + { 50, 239 }, + { 51, 238 }, + { 53, 237 }, + { 54, 236 }, + { 56, 235 }, + { 57, 234 }, + { 59, 233 }, + { 60, 232 }, + { 62, 231 }, + { 63, 230 }, + { 65, 229 }, + { 67, 228 }, + { 68, 227 }, + { 70, 226 }, + { 71, 225 }, + { 73, 224 }, + { 74, 223 }, + { 76, 222 }, + { 78, 221 }, + { 80, 220 }, + { 82, 219 }, + { 85, 218 }, + { 88, 217 }, + { 90, 216 }, + { 92, 215 }, + { 93, 214 }, + { 94, 212 }, + { 95, 211 }, + { 97, 210 }, + { 99, 209 }, + { 101, 208 }, + { 102, 207 }, + { 104, 206 }, + { 107, 205 }, + { 111, 204 }, + { 114, 203 }, + { 118, 202 }, + { 122, 201 }, + { 125, 200 }, + { 128, 199 }, + { 130, 198 }, + { 132, 197 }, + { 256, 190 }, +}; + +/* QAM256 SNR lookup table */ +static struct mse2snr_tab qam256_mse2snr_tab[] = { + { 16, 0 }, + { 17, 400 }, + { 18, 398 }, + { 19, 396 }, + { 20, 394 }, + { 21, 392 }, + { 22, 390 }, + { 23, 388 }, + { 24, 386 }, + { 25, 384 }, + { 26, 382 }, + { 27, 380 }, + { 28, 379 }, + { 29, 378 }, + { 30, 377 }, + { 31, 376 }, + { 32, 375 }, + { 33, 374 }, + { 34, 373 }, + { 35, 372 }, + { 36, 371 }, + { 37, 370 }, + { 38, 362 }, + { 39, 354 }, + { 40, 346 }, + { 41, 338 }, + { 42, 330 }, + { 43, 328 }, + { 44, 326 }, + { 45, 324 }, + { 46, 322 }, + { 47, 320 }, + { 48, 319 }, + { 49, 318 }, + { 50, 317 }, + { 51, 316 }, + { 52, 315 }, + { 53, 314 }, + { 54, 313 }, + { 55, 312 }, + { 56, 311 }, + { 57, 310 }, + { 58, 308 }, + { 59, 306 }, + { 60, 304 }, + { 61, 302 }, + { 62, 300 }, + { 63, 298 }, + { 65, 295 }, + { 68, 294 }, + { 70, 293 }, + { 73, 292 }, + { 76, 291 }, + { 78, 290 }, + { 79, 289 }, + { 81, 288 }, + { 82, 287 }, + { 83, 286 }, + { 84, 285 }, + { 85, 284 }, + { 86, 283 }, + { 88, 282 }, + { 89, 281 }, + { 256, 280 }, +}; + +static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, + u16 *snr) +{ + int i, ret = -EINVAL; + dprintk("%s()\n", __func__); + + for (i = 0; i < sz; i++) { + if (mse < tab[i].val) { + *snr = tab[i].data; + ret = 0; + break; + } + } + dprintk("%s() snr=%d\n", __func__, *snr); + return ret; +} + +static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq) +{ + struct au8522_state *state = fe->demodulator_priv; + u8 r0b5, r0b6, r0b7; + char *ifmhz; + + switch (if_freq) { + case AU8522_IF_3_25MHZ: + ifmhz = "3.25"; + r0b5 = 0x00; + r0b6 = 0x3d; + r0b7 = 0xa0; + break; + case AU8522_IF_4MHZ: + ifmhz = "4.00"; + r0b5 = 0x00; + r0b6 = 0x4b; + r0b7 = 0xd9; + break; + case AU8522_IF_6MHZ: + ifmhz = "6.00"; + r0b5 = 0xfb; + r0b6 = 0x8e; + r0b7 = 0x39; + break; + default: + dprintk("%s() IF Frequency not supported\n", __func__); + return -EINVAL; + } + dprintk("%s() %s MHz\n", __func__, ifmhz); + au8522_writereg(state, 0x80b5, r0b5); + au8522_writereg(state, 0x80b6, r0b6); + au8522_writereg(state, 0x80b7, r0b7); + + return 0; +} + +/* VSB Modulation table */ +static struct { + u16 reg; + u16 data; +} VSB_mod_tab[] = { + { 0x8090, 0x84 }, + { 0x4092, 0x11 }, + { 0x2005, 0x00 }, + { 0x8091, 0x80 }, + { 0x80a3, 0x0c }, + { 0x80a4, 0xe8 }, + { 0x8081, 0xc4 }, + { 0x80a5, 0x40 }, + { 0x80a7, 0x40 }, + { 0x80a6, 0x67 }, + { 0x8262, 0x20 }, + { 0x821c, 0x30 }, + { 0x80d8, 0x1a }, + { 0x8227, 0xa0 }, + { 0x8121, 0xff }, + { 0x80a8, 0xf0 }, + { 0x80a9, 0x05 }, + { 0x80aa, 0x77 }, + { 0x80ab, 0xf0 }, + { 0x80ac, 0x05 }, + { 0x80ad, 0x77 }, + { 0x80ae, 0x41 }, + { 0x80af, 0x66 }, + { 0x821b, 0xcc }, + { 0x821d, 0x80 }, + { 0x80a4, 0xe8 }, + { 0x8231, 0x13 }, +}; + +/* QAM Modulation table */ +static struct { + u16 reg; + u16 data; +} QAM_mod_tab[] = { + { 0x80a3, 0x09 }, + { 0x80a4, 0x00 }, + { 0x8081, 0xc4 }, + { 0x80a5, 0x40 }, + { 0x80aa, 0x77 }, + { 0x80ad, 0x77 }, + { 0x80a6, 0x67 }, + { 0x8262, 0x20 }, + { 0x821c, 0x30 }, + { 0x80b8, 0x3e }, + { 0x80b9, 0xf0 }, + { 0x80ba, 0x01 }, + { 0x80bb, 0x18 }, + { 0x80bc, 0x50 }, + { 0x80bd, 0x00 }, + { 0x80be, 0xea }, + { 0x80bf, 0xef }, + { 0x80c0, 0xfc }, + { 0x80c1, 0xbd }, + { 0x80c2, 0x1f }, + { 0x80c3, 0xfc }, + { 0x80c4, 0xdd }, + { 0x80c5, 0xaf }, + { 0x80c6, 0x00 }, + { 0x80c7, 0x38 }, + { 0x80c8, 0x30 }, + { 0x80c9, 0x05 }, + { 0x80ca, 0x4a }, + { 0x80cb, 0xd0 }, + { 0x80cc, 0x01 }, + { 0x80cd, 0xd9 }, + { 0x80ce, 0x6f }, + { 0x80cf, 0xf9 }, + { 0x80d0, 0x70 }, + { 0x80d1, 0xdf }, + { 0x80d2, 0xf7 }, + { 0x80d3, 0xc2 }, + { 0x80d4, 0xdf }, + { 0x80d5, 0x02 }, + { 0x80d6, 0x9a }, + { 0x80d7, 0xd0 }, + { 0x8250, 0x0d }, + { 0x8251, 0xcd }, + { 0x8252, 0xe0 }, + { 0x8253, 0x05 }, + { 0x8254, 0xa7 }, + { 0x8255, 0xff }, + { 0x8256, 0xed }, + { 0x8257, 0x5b }, + { 0x8258, 0xae }, + { 0x8259, 0xe6 }, + { 0x825a, 0x3d }, + { 0x825b, 0x0f }, + { 0x825c, 0x0d }, + { 0x825d, 0xea }, + { 0x825e, 0xf2 }, + { 0x825f, 0x51 }, + { 0x8260, 0xf5 }, + { 0x8261, 0x06 }, + { 0x821a, 0x00 }, + { 0x8546, 0x40 }, + { 0x8210, 0x26 }, + { 0x8211, 0xf6 }, + { 0x8212, 0x84 }, + { 0x8213, 0x02 }, + { 0x8502, 0x01 }, + { 0x8121, 0x04 }, + { 0x8122, 0x04 }, + { 0x852e, 0x10 }, + { 0x80a4, 0xca }, + { 0x80a7, 0x40 }, + { 0x8526, 0x01 }, +}; + +static int au8522_enable_modulation(struct dvb_frontend *fe, + fe_modulation_t m) +{ + struct au8522_state *state = fe->demodulator_priv; + int i; + + dprintk("%s(0x%08x)\n", __func__, m); + + switch (m) { + case VSB_8: + dprintk("%s() VSB_8\n", __func__); + for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) + au8522_writereg(state, + VSB_mod_tab[i].reg, + VSB_mod_tab[i].data); + au8522_set_if(fe, state->config->vsb_if); + break; + case QAM_64: + case QAM_256: + dprintk("%s() QAM 64/256\n", __func__); + for (i = 0; i < ARRAY_SIZE(QAM_mod_tab); i++) + au8522_writereg(state, + QAM_mod_tab[i].reg, + QAM_mod_tab[i].data); + au8522_set_if(fe, state->config->qam_if); + break; + default: + dprintk("%s() Invalid modulation\n", __func__); + return -EINVAL; + } + + state->current_modulation = m; + + return 0; +} + +/* Talk to the demod, set the FEC, GUARD, QAM settings etc */ +static int au8522_set_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + struct au8522_state *state = fe->demodulator_priv; + int ret = -EINVAL; + + dprintk("%s(frequency=%d)\n", __func__, p->frequency); + + if ((state->current_frequency == p->frequency) && + (state->current_modulation == p->u.vsb.modulation)) + return 0; + + au8522_enable_modulation(fe, p->u.vsb.modulation); + + /* Allow the demod to settle */ + msleep(100); + + if (fe->ops.tuner_ops.set_params) { + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + ret = fe->ops.tuner_ops.set_params(fe, p); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + } + + if (ret < 0) + return ret; + + state->current_frequency = p->frequency; + + return 0; +} + +/* Reset the demod hardware and reset all of the configuration registers + to a default state. */ +static int au8522_init(struct dvb_frontend *fe) +{ + struct au8522_state *state = fe->demodulator_priv; + dprintk("%s()\n", __func__); + + au8522_writereg(state, 0xa4, 1 << 5); + + au8522_i2c_gate_ctrl(fe, 1); + + return 0; +} + +static int au8522_led_gpio_enable(struct au8522_state *state, int onoff) +{ + struct au8522_led_config *led_config = state->config->led_cfg; + u8 val; + + /* bail out if we cant control an LED */ + if (!led_config || !led_config->gpio_output || + !led_config->gpio_output_enable || !led_config->gpio_output_disable) + return 0; + + val = au8522_readreg(state, 0x4000 | + (led_config->gpio_output & ~0xc000)); + if (onoff) { + /* enable GPIO output */ + val &= ~((led_config->gpio_output_enable >> 8) & 0xff); + val |= (led_config->gpio_output_enable & 0xff); + } else { + /* disable GPIO output */ + val &= ~((led_config->gpio_output_disable >> 8) & 0xff); + val |= (led_config->gpio_output_disable & 0xff); + } + return au8522_writereg(state, 0x8000 | + (led_config->gpio_output & ~0xc000), val); +} + +/* led = 0 | off + * led = 1 | signal ok + * led = 2 | signal strong + * led < 0 | only light led if leds are currently off + */ +static int au8522_led_ctrl(struct au8522_state *state, int led) +{ + struct au8522_led_config *led_config = state->config->led_cfg; + int i, ret = 0; + + /* bail out if we cant control an LED */ + if (!led_config || !led_config->gpio_leds || + !led_config->num_led_states || !led_config->led_states) + return 0; + + if (led < 0) { + /* if LED is already lit, then leave it as-is */ + if (state->led_state) + return 0; + else + led *= -1; + } + + /* toggle LED if changing state */ + if (state->led_state != led) { + u8 val; + + dprintk("%s: %d\n", __func__, led); + + au8522_led_gpio_enable(state, 1); + + val = au8522_readreg(state, 0x4000 | + (led_config->gpio_leds & ~0xc000)); + + /* start with all leds off */ + for (i = 0; i < led_config->num_led_states; i++) + val &= ~led_config->led_states[i]; + + /* set selected LED state */ + if (led < led_config->num_led_states) + val |= led_config->led_states[led]; + else if (led_config->num_led_states) + val |= + led_config->led_states[led_config->num_led_states - 1]; + + ret = au8522_writereg(state, 0x8000 | + (led_config->gpio_leds & ~0xc000), val); + if (ret < 0) + return ret; + + state->led_state = led; + + if (led == 0) + au8522_led_gpio_enable(state, 0); + } + + return 0; +} + +static int au8522_sleep(struct dvb_frontend *fe) +{ + struct au8522_state *state = fe->demodulator_priv; + dprintk("%s()\n", __func__); + + /* turn off led */ + au8522_led_ctrl(state, 0); + + state->current_frequency = 0; + + return 0; +} + +static int au8522_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct au8522_state *state = fe->demodulator_priv; + u8 reg; + u32 tuner_status = 0; + + *status = 0; + + if (state->current_modulation == VSB_8) { + dprintk("%s() Checking VSB_8\n", __func__); + reg = au8522_readreg(state, 0x4088); + if ((reg & 0x03) == 0x03) + *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI; + } else { + dprintk("%s() Checking QAM\n", __func__); + reg = au8522_readreg(state, 0x4541); + if (reg & 0x80) + *status |= FE_HAS_VITERBI; + if (reg & 0x20) + *status |= FE_HAS_LOCK | FE_HAS_SYNC; + } + + switch (state->config->status_mode) { + case AU8522_DEMODLOCKING: + dprintk("%s() DEMODLOCKING\n", __func__); + if (*status & FE_HAS_VITERBI) + *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; + break; + case AU8522_TUNERLOCKING: + /* Get the tuner status */ + dprintk("%s() TUNERLOCKING\n", __func__); + if (fe->ops.tuner_ops.get_status) { + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + fe->ops.tuner_ops.get_status(fe, &tuner_status); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + } + if (tuner_status) + *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; + break; + } + state->fe_status = *status; + + if (*status & FE_HAS_LOCK) + /* turn on LED, if it isn't on already */ + au8522_led_ctrl(state, -1); + else + /* turn off LED */ + au8522_led_ctrl(state, 0); + + dprintk("%s() status 0x%08x\n", __func__, *status); + + return 0; +} + +static int au8522_led_status(struct au8522_state *state, const u16 *snr) +{ + struct au8522_led_config *led_config = state->config->led_cfg; + int led; + u16 strong; + + /* bail out if we cant control an LED */ + if (!led_config) + return 0; + + if (0 == (state->fe_status & FE_HAS_LOCK)) + return au8522_led_ctrl(state, 0); + else if (state->current_modulation == QAM_256) + strong = led_config->qam256_strong; + else if (state->current_modulation == QAM_64) + strong = led_config->qam64_strong; + else /* (state->current_modulation == VSB_8) */ + strong = led_config->vsb8_strong; + + if (*snr >= strong) + led = 2; + else + led = 1; + + if ((state->led_state) && + (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) + /* snr didn't change enough to bother + * changing the color of the led */ + return 0; + + return au8522_led_ctrl(state, led); +} + +static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct au8522_state *state = fe->demodulator_priv; + int ret = -EINVAL; + + dprintk("%s()\n", __func__); + + if (state->current_modulation == QAM_256) + ret = au8522_mse2snr_lookup(qam256_mse2snr_tab, + ARRAY_SIZE(qam256_mse2snr_tab), + au8522_readreg(state, 0x4522), + snr); + else if (state->current_modulation == QAM_64) + ret = au8522_mse2snr_lookup(qam64_mse2snr_tab, + ARRAY_SIZE(qam64_mse2snr_tab), + au8522_readreg(state, 0x4522), + snr); + else /* VSB_8 */ + ret = au8522_mse2snr_lookup(vsb_mse2snr_tab, + ARRAY_SIZE(vsb_mse2snr_tab), + au8522_readreg(state, 0x4311), + snr); + + if (state->config->led_cfg) + au8522_led_status(state, snr); + + return ret; +} + +static int au8522_read_signal_strength(struct dvb_frontend *fe, + u16 *signal_strength) +{ + return au8522_read_snr(fe, signal_strength); +} + +static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct au8522_state *state = fe->demodulator_priv; + + if (state->current_modulation == VSB_8) + *ucblocks = au8522_readreg(state, 0x4087); + else + *ucblocks = au8522_readreg(state, 0x4543); + + return 0; +} + +static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + return au8522_read_ucblocks(fe, ber); +} + +static int au8522_get_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + struct au8522_state *state = fe->demodulator_priv; + + p->frequency = state->current_frequency; + p->u.vsb.modulation = state->current_modulation; + + return 0; +} + +static int au8522_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *tune) +{ + tune->min_delay_ms = 1000; + return 0; +} + +static void au8522_release(struct dvb_frontend *fe) +{ + struct au8522_state *state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops au8522_ops; + +struct dvb_frontend *au8522_attach(const struct au8522_config *config, + struct i2c_adapter *i2c) +{ + struct au8522_state *state = NULL; + + /* allocate memory for the internal state */ + state = kmalloc(sizeof(struct au8522_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &au8522_ops, + sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + if (au8522_init(&state->frontend) != 0) { + printk(KERN_ERR "%s: Failed to initialize correctly\n", + __func__); + goto error; + } + + /* Note: Leaving the I2C gate open here. */ + au8522_i2c_gate_ctrl(&state->frontend, 1); + + return &state->frontend; + +error: + kfree(state); + return NULL; +} +EXPORT_SYMBOL(au8522_attach); + +static struct dvb_frontend_ops au8522_ops = { + + .info = { + .name = "Auvitek AU8522 QAM/8VSB Frontend", + .type = FE_ATSC, + .frequency_min = 54000000, + .frequency_max = 858000000, + .frequency_stepsize = 62500, + .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB + }, + + .init = au8522_init, + .sleep = au8522_sleep, + .i2c_gate_ctrl = au8522_i2c_gate_ctrl, + .set_frontend = au8522_set_frontend, + .get_frontend = au8522_get_frontend, + .get_tune_settings = au8522_get_tune_settings, + .read_status = au8522_read_status, + .read_ber = au8522_read_ber, + .read_signal_strength = au8522_read_signal_strength, + .read_snr = au8522_read_snr, + .read_ucblocks = au8522_read_ucblocks, + .release = au8522_release, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Enable verbose debug messages"); + +MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); +MODULE_AUTHOR("Steven Toth"); +MODULE_LICENSE("GPL"); |