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Subject[PATCH 5/7] adding lgdt3304 based driver
    lgdt3304.c:
frontend driver for the lgdt3304 chip, this driver is not compatible
with the lgdt330x.
commit d716aa3797b966277cc160fc1f089357365336b5
Author: Markus Rechberger <mrechberger@sundtek.de>
Date: Wed Oct 22 22:11:14 2008 +0200

adding lgdt3304 based driver

lgdt3304.c:
frontend driver for the lgdt3304 chip, this driver is not compatible
with the lgdt330x.

Signed-off-by: Markus Rechberger <mrechberger@sundtek.de>

diff --git a/drivers/media/video/empia/lgdt3304/Makefile b/drivers/media/video/empia/lgdt3304/Makefile
new file mode 100644
index 0000000..4d261a7
--- /dev/null
+++ b/drivers/media/video/empia/lgdt3304/Makefile
@@ -0,0 +1,7 @@
+lgdt3304-demod-objs := lgdt3304.o
+
+obj-m += lgdt3304-demod.o
+
+EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
+EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
+EXTRA_CFLAGS += -DCONFIG_DVB_LGDT3304
diff --git a/drivers/media/video/empia/lgdt3304/lgdt3304.c b/drivers/media/video/empia/lgdt3304/lgdt3304.c
new file mode 100644
index 0000000..1e8867b
--- /dev/null
+++ b/drivers/media/video/empia/lgdt3304/lgdt3304.c
@@ -0,0 +1,398 @@
+/*
+ * Driver for LG ATSC lgdt3304 driver
+ *
+ * Copyright (C) 2008 Markus Rechberger <mrechberger@sundtek.de>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include "dvb_frontend.h"
+#include "lgdt3304.h"
+
+static unsigned int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,"lgdt3304 debugging (default off)");
+
+#define dprintk(fmt, args...) if (debug) do {\
+ printk("lgdt3304 debug: " fmt, ##args); } while (0)
+
+struct lgdt3304_state
+{
+ struct dvb_frontend frontend;
+ fe_modulation_t current_modulation;
+ __u32 snr;
+ __u32 current_frequency;
+ __u8 addr;
+ struct i2c_adapter *i2c;
+};
+
+static int i2c_write_demod_bytes (struct dvb_frontend *fe, __u8 *buf, int len)
+{
+ struct lgdt3304_state *state = fe->demodulator_priv;
+ struct i2c_msg i2cmsgs = {
+ .addr = state->addr,
+ .flags = 0,
+ .len = 3,
+ .buf = buf
+ };
+ int i;
+ int err;
+
+ for (i=0; i<len-1; i+=3){
+ if((err = i2c_transfer(state->i2c, &i2cmsgs, 1))<0) {
+ printk("%s i2c_transfer error %d\n", __FUNCTION__, err);
+ if (err < 0)
+ return err;
+ else
+ return -EREMOTEIO;
+ }
+ i2cmsgs.buf += 3;
+ }
+ return 0;
+}
+
+static int lgdt3304_i2c_read_reg(struct dvb_frontend *fe, unsigned int reg)
+{
+ struct lgdt3304_state *state = fe->demodulator_priv;
+ struct i2c_msg i2cmsgs[2];
+ int ret;
+ __u8 buf;
+
+ __u8 regbuf[2] = { reg>>8, reg&0xff };
+
+ i2cmsgs[0].addr = state->addr;
+ i2cmsgs[0].flags = 0;
+ i2cmsgs[0].len = 2;
+ i2cmsgs[0].buf = regbuf;
+
+ i2cmsgs[1].addr = state->addr;
+ i2cmsgs[1].flags = I2C_M_RD;
+ i2cmsgs[1].len = 1;
+ i2cmsgs[1].buf = &buf;
+
+ if((ret = i2c_transfer(state->i2c, i2cmsgs, 2))<0) {
+ printk("%s i2c_transfer error %d\n", __FUNCTION__, ret);
+ return ret;
+ }
+
+ return buf;
+}
+
+static int lgdt3304_i2c_write_reg(struct dvb_frontend *fe, int reg, int val)
+{
+ struct lgdt3304_state *state = fe->demodulator_priv;
+ char buffer[3] = { reg>>8, reg&0xff, val };
+ int ret;
+
+ struct i2c_msg i2cmsgs = {
+ .addr = state->addr,
+ .flags = 0,
+ .len = 3,
+ .buf=buffer
+ };
+ ret = i2c_transfer(state->i2c, &i2cmsgs, 1);
+ if (ret != 1) {
+ printk("%s i2c_transfer error %d\n", __FUNCTION__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+
+static int lgdt3304_soft_Reset(struct dvb_frontend *fe)
+{
+ lgdt3304_i2c_write_reg(fe, 0x0002, 0x9a);
+ lgdt3304_i2c_write_reg(fe, 0x0002, 0x9b);
+ mdelay(200);
+ return 0;
+}
+
+static int lgdt3304_set_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *param) {
+ int err = 0;
+
+ static __u8 lgdt3304_vsb8_data[] = {
+ /* 16bit , 8bit */
+ /* regs , val */
+ 0x00, 0x00, 0x02,
+ 0x00, 0x00, 0x13,
+ 0x00, 0x0d, 0x02,
+ 0x00, 0x0e, 0x02,
+ 0x00, 0x12, 0x32,
+ 0x00, 0x13, 0xc4,
+ 0x01, 0x12, 0x17,
+ 0x01, 0x13, 0x15,
+ 0x01, 0x14, 0x18,
+ 0x01, 0x15, 0xff,
+ 0x01, 0x16, 0x2c,
+ 0x02, 0x14, 0x67,
+ 0x02, 0x24, 0x8d,
+ 0x04, 0x27, 0x12,
+ 0x04, 0x28, 0x4f,
+ 0x03, 0x08, 0x80,
+ 0x03, 0x09, 0x00,
+ 0x03, 0x0d, 0x00,
+ 0x03, 0x0e, 0x1c,
+ 0x03, 0x14, 0xe1,
+ 0x05, 0x0e, 0x5b,
+ };
+
+ /* not yet tested .. */
+ static __u8 lgdt3304_qam64_data[] = {
+ /* 16bit , 8bit */
+ /* regs , val */
+ 0x00, 0x00, 0x18,
+ 0x00, 0x0d, 0x02,
+ //0x00, 0x0e, 0x02,
+ 0x00, 0x12, 0x2a,
+ 0x00, 0x13, 0x00,
+ 0x03, 0x14, 0xe3,
+ 0x03, 0x0e, 0x1c,
+ 0x03, 0x08, 0x66,
+ 0x03, 0x09, 0x66,
+ 0x03, 0x0a, 0x08,
+ 0x03, 0x0b, 0x9b,
+ 0x05, 0x0e, 0x5b,
+ };
+
+#if 0
+ /* not yet tested */
+ static __u8 lgdt3304_qam256_data[] = {
+ /* 16bit , 8bit */
+ /* regs , val */
+ 0x00, 0x00, 0x19,
+ 0x00, 0x12, 0x2a,
+ 0x00, 0x13, 0x80,
+ 0x00, 0x0d, 0x02,
+ 0x03, 0x14, 0xe3,
+
+ 0x03, 0x0e, 0x1c,
+ 0x03, 0x08, 0x66,
+ 0x03, 0x09, 0x66,
+ 0x03, 0x0a, 0x08,
+ 0x03, 0x0b, 0x9b,
+ 0x03, 0x0d, 0x14,
+ 0x05, 0x0e, 0x5b,
+ };
+#endif
+
+ /* tested with KWorld a340 */
+ static __u8 lgdt3304_qam256_data[] = {
+ /* 16bit , 8bit */
+ /* regs , val */
+ 0x00, 0x00, 0x01, //0x19,
+ 0x00, 0x12, 0x2a,
+ 0x00, 0x13, 0x80,
+ 0x00, 0x0d, 0x02,
+ 0x03, 0x14, 0xe3,
+
+ 0x03, 0x0e, 0x1c,
+ 0x03, 0x08, 0x66,
+ 0x03, 0x09, 0x66,
+ 0x03, 0x0a, 0x08,
+ 0x03, 0x0b, 0x9b,
+
+ 0x03, 0x0d, 0x14,
+ //0x05, 0x0e, 0x5b,
+ 0x01, 0x06, 0x4a,
+ 0x01, 0x07, 0x3d,
+ 0x01, 0x08, 0x70,
+ 0x01, 0x09, 0xa3,
+
+ 0x05, 0x04, 0xfd,
+
+ 0x00, 0x0d, 0x82,
+
+ 0x05, 0x0e, 0x5b,
+
+ 0x05, 0x0e, 0x5b,
+
+ 0x00, 0x02, 0x9a,
+
+ 0x00, 0x02, 0x9b,
+
+ 0x00, 0x00, 0x01,
+ 0x00, 0x12, 0x2a,
+ 0x00, 0x13, 0x80,
+ 0x00, 0x0d, 0x02,
+ 0x03, 0x14, 0xe3,
+
+ 0x03, 0x0e, 0x1c,
+ 0x03, 0x08, 0x66,
+ 0x03, 0x09, 0x66,
+ 0x03, 0x0a, 0x08,
+ 0x03, 0x0b, 0x9b,
+
+ 0x03, 0x0d, 0x14,
+ 0x01, 0x06, 0x4a,
+ 0x01, 0x07, 0x3d,
+ 0x01, 0x08, 0x70,
+ 0x01, 0x09, 0xa3,
+
+ 0x05, 0x04, 0xfd,
+
+ 0x00, 0x0d, 0x82,
+
+ 0x05, 0x0e, 0x5b,
+ };
+
+ struct lgdt3304_state *state = fe->demodulator_priv;
+ if (state->current_modulation != param->u.vsb.modulation) {
+ switch(param->u.vsb.modulation) {
+ case VSB_8:
+ err = i2c_write_demod_bytes(fe, lgdt3304_vsb8_data,
+ sizeof(lgdt3304_vsb8_data));
+ break;
+ case QAM_64:
+ err = i2c_write_demod_bytes(fe, lgdt3304_qam64_data,
+ sizeof(lgdt3304_qam64_data));
+ break;
+ case QAM_256:
+ err = i2c_write_demod_bytes(fe, lgdt3304_qam256_data,
+ sizeof(lgdt3304_qam256_data));
+ break;
+ default:
+ break;
+ }
+
+ if (err) {
+ printk("%s error setting modulation\n", __FUNCTION__);
+ } else {
+ state->current_modulation = param->u.vsb.modulation;
+ }
+ }
+ state->current_frequency = param->frequency;
+
+ lgdt3304_soft_Reset(fe);
+
+
+ if (fe->ops.tuner_ops.set_params)
+ fe->ops.tuner_ops.set_params(fe, param);
+
+ return 0;
+}
+
+static int lgdt3304_init(struct dvb_frontend *fe) {
+ return 0;
+}
+
+static int lgdt3304_sleep(struct dvb_frontend *fe) {
+ return 0;
+}
+
+
+static int lgdt3304_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct lgdt3304_state *state = fe->demodulator_priv;
+ int r011d;
+ int qam_lck;
+
+ *status = 0;
+ dprintk("lgdt read status\n");
+
+ r011d = lgdt3304_i2c_read_reg(fe, 0x011d);
+
+ dprintk("%02x\n", r011d);
+
+ switch(state->current_modulation) {
+ case VSB_8:
+ if (r011d & 0x80) {
+ dprintk("VSB Locked\n");
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_LOCK;
+ *status |= FE_HAS_SYNC;
+ *status |= FE_HAS_SIGNAL;
+ }
+ break;
+ case QAM_64:
+ case QAM_256:
+ qam_lck = r011d & 0x7;
+ switch(qam_lck) {
+ case 0x0: dprintk("Unlock\n");
+ break;
+ case 0x4: dprintk("1st Lock in acquisition state\n");
+ break;
+ case 0x6: dprintk("2nd Lock in acquisition state\n");
+ break;
+ case 0x7: dprintk("Final Lock in good reception state\n");
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_LOCK;
+ *status |= FE_HAS_SYNC;
+ *status |= FE_HAS_SIGNAL;
+ break;
+ }
+ break;
+ default:
+ printk("%s unhandled modulation\n", __FUNCTION__);
+ }
+
+
+ return 0;
+}
+
+static int lgdt3304_read_ber(struct dvb_frontend *fe, __u32 *ber)
+{
+ dprintk("read ber\n");
+ return 0;
+}
+
+static int lgdt3304_read_snr(struct dvb_frontend *fe, __u16 *snr)
+{
+ dprintk("read snr\n");
+ return 0;
+}
+
+static int lgdt3304_read_ucblocks(struct dvb_frontend *fe, __u32 *ucblocks)
+{
+ dprintk("read ucblocks\n");
+ return 0;
+}
+
+static void lgdt3304_release(struct dvb_frontend *fe)
+{
+ struct lgdt3304_state *state = (struct lgdt3304_state *)fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops demod_lgdt3304={
+ .info = {
+ .name = "LG 3304",
+ .type = FE_ATSC,
+ .frequency_min = 54000000,
+ .frequency_max = 858000000,
+ .frequency_stepsize = 62500,
+ .symbol_rate_min = 5056941,
+ .symbol_rate_max = 10762000,
+ .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
+ },
+ .init = lgdt3304_init,
+ .sleep = lgdt3304_sleep,
+ .set_frontend = lgdt3304_set_parameters,
+ .read_snr = lgdt3304_read_snr,
+ .read_ber = lgdt3304_read_ber,
+ .read_status = lgdt3304_read_status,
+ .read_ucblocks = lgdt3304_read_ucblocks,
+ .release = lgdt3304_release,
+};
+
+struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
+ struct i2c_adapter *i2c)
+{
+
+ struct lgdt3304_state *state;
+ state = kzalloc(sizeof(struct lgdt3304_state), GFP_KERNEL);
+ memset(state, 0x0, sizeof(struct lgdt3304_state));
+ state->addr = config->i2c_address;
+ state->i2c = i2c;
+
+ memcpy(&state->frontend.ops, &demod_lgdt3304, sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+ return &state->frontend;
+}
+
+EXPORT_SYMBOL_GPL(lgdt3304_attach);
+MODULE_AUTHOR("Markus Rechberger <mrechberger@empiatech.com>");
+MODULE_DESCRIPTION("LGE LGDT3304 DVB-T demodulator driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/video/empia/lgdt3304/lgdt3304.h b/drivers/media/video/empia/lgdt3304/lgdt3304.h
new file mode 100644
index 0000000..fc409fe
--- /dev/null
+++ b/drivers/media/video/empia/lgdt3304/lgdt3304.h
@@ -0,0 +1,45 @@
+/*
+ * Driver for DVB-T lgdt3304 demodulator
+ *
+ * Copyright (C) 2008 Markus Rechberger <mrechberger@gmail.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.=
+ */
+
+#ifndef LGDT3304_H
+#define LGDT3304_H
+
+#include <linux/dvb/frontend.h>
+
+struct lgdt3304_config
+{
+ /* demodulator's I2C address */
+ u8 i2c_address;
+};
+
+#if defined(CONFIG_DVB_LGDT3304) || (defined(CONFIG_DVB_LGDT3304_MODULE) && defined(MODULE))
+extern struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
+ struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
+ struct i2c_adapter *i2c)
+{
+ printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+ return NULL;
+}
+#endif /* CONFIG_DVB_LGDT */
+
+#endif /* LGDT3304_H */
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