au8522: rename the au8522.c source file

From: Devin Heitmueller <dheitmueller@linuxtv.org>

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.

Priority: normal

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>

1 files changed, 0 insertions, 880 deletions

diff --git a/linux/drivers/media/dvb/frontends/au8522.c b/linux/drivers/media/dvb/frontends/au8522.c
deleted file mode 100644
index 1e3ad2302..000000000
--- a/linux/drivers/media/dvb/frontends/au8522.c
+++ /dev/null
@@ -1,880 +0,0 @@
-/*
-    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;
-#if 0
-	/* check if the demod exists */
-	reg = au8522_readreg(state, 0x04);
-	if ((reg != 0x0066) && (reg != 0x007f))
-		goto error;
-#endif
-	/* 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");