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Diffstat (limited to 'drivers/media/dvb/frontends/au8522.c')
-rw-r--r--drivers/media/dvb/frontends/au8522.c692
1 files changed, 692 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/au8522.c b/drivers/media/dvb/frontends/au8522.c
new file mode 100644
index 00000000000..084a280c2d7
--- /dev/null
+++ b/drivers/media/dvb/frontends/au8522.c
@@ -0,0 +1,692 @@
+/*
+ Auvitek AU8522 QAM/8VSB demodulator driver
+
+ Copyright (C) 2008 Steven Toth <stoth@hauppauge.com>
+
+ 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 "dvb-pll.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;
+
+};
+
+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;
+}
+
+/* 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 },
+ { 0x80b5, 0xfb },
+ { 0x80b6, 0x8e },
+ { 0x80b7, 0x39 },
+ { 0x80a4, 0xe8 },
+ { 0x8231, 0x13 },
+};
+
+/* QAM Modulation table */
+static struct {
+ u16 reg;
+ u16 data;
+} QAM_mod_tab[] = {
+ { 0x80a3, 0x09 },
+ { 0x80a4, 0x00 },
+ { 0x8081, 0xc4 },
+ { 0x80a5, 0x40 },
+ { 0x80b5, 0xfb },
+ { 0x80b6, 0x8e },
+ { 0x80b7, 0x39 },
+ { 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);
+ 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);
+ 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;
+
+ dprintk("%s(frequency=%d)\n", __func__, p->frequency);
+
+ state->current_frequency = p->frequency;
+
+ 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);
+ fe->ops.tuner_ops.set_params(fe, p);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+
+ 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_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 & 0x01)
+ *status |= FE_HAS_VITERBI;
+ if (reg & 0x02)
+ *status |= FE_HAS_LOCK | FE_HAS_SYNC;
+ } 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;
+ }
+
+ dprintk("%s() status 0x%08x\n", __func__, *status);
+
+ return 0;
+}
+
+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);
+
+ 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,
+ .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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-03 15:24:08 +0000