[media] s5h1432: Add new s5h1432 driver

Introduce a new driver for the s5h1432

Signed-off-by: Palash Bandyopadhyay <palash.bandyopadhyay@conexant.com>
Signed-off-by: Devin Heitmueller <dheitmueller@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 440 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/s5h1432.c b/drivers/media/dvb/frontends/s5h1432.c
new file mode 100644
index 000000000000..cff164c812e0
--- /dev/null
+++ b/drivers/media/dvb/frontends/s5h1432.c
@@ -0,0 +1,440 @@
+/*
+    Samsung s5h1432 DVB-T demodulator driver
+
+    Copyright (C) 2009 Bill Liu <Bill.Liu@Conexant.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 "s5h1432.h"
+
+struct s5h1432_state {
+
+	struct i2c_adapter *i2c;
+
+	/* configuration settings */
+	const struct s5h1432_config *config;
+
+	struct dvb_frontend frontend;
+
+	fe_modulation_t current_modulation;
+	unsigned int first_tune:1;
+
+	u32 current_frequency;
+	int if_freq;
+
+	u8 inversion;
+};
+
+static int debug;
+
+#define dprintk(arg...) do {	\
+	if (debug)		\
+		printk(arg);	\
+	} while (0)
+
+
+static int s5h1432_writereg(struct s5h1432_state *state,
+	u8 addr, u8 reg, u8 data)
+{
+	int ret;
+	u8 buf[] = { reg, data };
+
+	struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = 2 };
+
+	ret = i2c_transfer(state->i2c, &msg, 1);
+
+	if (ret != 1)
+		printk(KERN_ERR "%s: writereg error 0x%02x 0x%02x 0x%04x, "
+		       "ret == %i)\n", __func__, addr, reg, data, ret);
+
+	return (ret != 1) ? -1 : 0;
+}
+
+static u8 s5h1432_readreg(struct s5h1432_state *state, u8 addr, u8 reg)
+{
+	int ret;
+	u8 b0[] = { reg };
+	u8 b1[] = { 0 };
+
+	struct i2c_msg msg[] = {
+		{ .addr = addr, .flags = 0, .buf = b0, .len = 1 },
+		{ .addr = addr, .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 s5h1432_sleep(struct dvb_frontend *fe)
+{
+	return 0;
+}
+
+static int s5h1432_set_channel_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
+{
+
+	struct s5h1432_state *state = fe->demodulator_priv;
+
+	u8 reg = 0;
+
+
+    /* Register        [0x2E] bit 3:2 : 8MHz = 0; 7MHz = 1; 6MHz = 2*/
+	reg = s5h1432_readreg(state, S5H1432_I2C_TOP_ADDR, 0x2E);
+	reg &= ~(0x0C);
+	switch (bandwidth) {
+	case 6:
+		reg |= 0x08;
+		break;
+	case 7:
+		reg |= 0x04;
+		break;
+	case 8:
+		reg |= 0x00;
+		break;
+	default:
+	return 0;
+	}
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x2E, reg);
+    return 1;
+}
+
+static int s5h1432_set_IF(struct dvb_frontend *fe, u32 ifFreqHz)
+{
+
+	struct s5h1432_state *state = fe->demodulator_priv;
+
+	switch (ifFreqHz) {
+	case TAIWAN_HI_IF_FREQ_44_MHZ:
+		{
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0x55);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0x55);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0x15);
+		    break;
+		}
+	case EUROPE_HI_IF_FREQ_36_MHZ:
+		{
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0x00);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0x00);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0x40);
+		    break;
+		}
+	case IF_FREQ_6_MHZ:
+		{
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0x00);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0x00);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0xe0);
+		    break;
+		}
+	case IF_FREQ_3point3_MHZ:
+		{
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0x66);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0x66);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0xEE);
+		    break;
+		}
+	case IF_FREQ_3point5_MHZ:
+		{
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0x55);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0x55);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0xED);
+		    break;
+		}
+	case IF_FREQ_4_MHZ:
+		{
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0xAA);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0xAA);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0xEA);
+		    break;
+		}
+	default:
+		{
+		u32 value = 0;
+		value = (u32) (((48000 - (ifFreqHz / 1000)) * 512 *
+				 (u32) 32768) / (48 * 1000));
+		printk(KERN_INFO "Default IFFreq %d :reg value = 0x%x \n",
+				 ifFreqHz, value);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 ,
+				 (u8) value & 0xFF);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 ,
+				 (u8)(value>>8) & 0xFF);
+		    s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 ,
+				 (u8)(value>>16) & 0xFF);
+		    break;
+	}
+
+	}
+
+    return 1;
+}
+
+/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
+static int s5h1432_set_frontend(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *p)
+{
+	u32 dvb_bandwidth = 8;
+	struct s5h1432_state *state = fe->demodulator_priv;
+
+	if (p->frequency == state->current_frequency) {
+		/*current_frequency = p->frequency;*/
+		/*state->current_frequency = p->frequency;*/
+	} else {
+		fe->ops.tuner_ops.set_params(fe, p); msleep(300);
+		s5h1432_set_channel_bandwidth(fe, dvb_bandwidth);
+		switch (p->u.ofdm.bandwidth) {
+		case BANDWIDTH_6_MHZ:
+				dvb_bandwidth = 6;
+				s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
+				break;
+		case BANDWIDTH_7_MHZ:
+				dvb_bandwidth = 7;
+				s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
+				break;
+		case BANDWIDTH_8_MHZ:
+				dvb_bandwidth = 8;
+				s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
+				break;
+		default:
+				return 0;
+			}
+		/*fe->ops.tuner_ops.set_params(fe, p);*/
+/*Soft Reset chip*/
+	msleep(30);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09,	0x1a);
+	msleep(30);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09,	0x1b);
+
+
+		s5h1432_set_channel_bandwidth(fe, dvb_bandwidth);
+		switch (p->u.ofdm.bandwidth) {
+		case BANDWIDTH_6_MHZ:
+				dvb_bandwidth = 6;
+				s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
+				break;
+		case BANDWIDTH_7_MHZ:
+				dvb_bandwidth = 7;
+				s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
+				break;
+		case BANDWIDTH_8_MHZ:
+				dvb_bandwidth = 8;
+				s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
+				break;
+		default:
+				return 0;
+			}
+		/*fe->ops.tuner_ops.set_params(fe,p);*/
+/*Soft Reset chip*/
+	msleep(30);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09,	0x1a);
+	msleep(30);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09,	0x1b);
+
+	}
+
+	state->current_frequency = p->frequency;
+
+	return 0;
+}
+
+
+static int s5h1432_init(struct dvb_frontend *fe)
+{
+	struct s5h1432_state *state = fe->demodulator_priv;
+
+	u8 reg = 0;
+	state->current_frequency = 0;
+	printk(KERN_INFO " s5h1432_init().\n");
+
+
+    /*Set VSB mode as default, this also does a soft reset*/
+    /*Initialize registers*/
+
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x04,	0xa8);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x05,	0x01);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x07,	0x70);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x19,	0x80);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1b,	0x9D);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1c,	0x30);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1d,	0x20);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1e,	0x1B);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x2e,	0x40);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x42,	0x84);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x50,	0x5a);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x5a,	0xd3);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x68,	0x50);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xb8,	0x3c);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xc4,	0x10);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xcc,	0x9c);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xDA,	0x00);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe1,	0x94);
+/*	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xf4,	0xa1);*/
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xf9,	0x00);
+
+/*For NXP tuner*/
+
+    /*Set 3.3MHz as default IF frequency*/
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4 , 0x66);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5 , 0x66);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7 , 0xEE);
+    /* Set reg 0x1E to get the full dynamic range */
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1e,	0x31);
+
+/*Mode setting in demod*/
+	reg = s5h1432_readreg(state, S5H1432_I2C_TOP_ADDR, 0x42);
+	reg |= 0x80;
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x42, reg);
+	/*Serial mode*/
+
+/*Soft Reset chip*/
+
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09,	0x1a);
+	msleep(30);
+	s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09,	0x1b);
+
+
+	return 0;
+}
+
+
+static int s5h1432_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+	return 0;
+}
+
+
+
+static int s5h1432_read_signal_strength(struct dvb_frontend *fe,
+	u16 *signal_strength)
+{
+	return 0;
+}
+
+static int s5h1432_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	return 0;
+}
+
+static int s5h1432_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+
+	return 0;
+}
+
+static int s5h1432_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	return 0;
+}
+
+static int s5h1432_get_frontend(struct dvb_frontend *fe,
+				struct dvb_frontend_parameters *p)
+{
+	return 0;
+}
+
+static int s5h1432_get_tune_settings(struct dvb_frontend *fe,
+				     struct dvb_frontend_tune_settings *tune)
+{
+	return 0;
+}
+
+static void s5h1432_release(struct dvb_frontend *fe)
+{
+	struct s5h1432_state *state = fe->demodulator_priv;
+	kfree(state);
+}
+
+static struct dvb_frontend_ops s5h1432_ops;
+
+struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config,
+				    struct i2c_adapter *i2c)
+{
+	struct s5h1432_state *state = NULL;
+
+	printk(KERN_INFO " Enter s5h1432_attach(). attach success!\n");
+	/* allocate memory for the internal state */
+	state = kmalloc(sizeof(struct s5h1432_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->config = config;
+	state->i2c = i2c;
+	state->current_modulation = QAM_16;
+	state->inversion = state->config->inversion;
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &s5h1432_ops,
+	       sizeof(struct dvb_frontend_ops));
+
+	state->frontend.demodulator_priv = state;
+
+	return &state->frontend;
+
+error:
+	kfree(state);
+	return NULL;
+}
+EXPORT_SYMBOL(s5h1432_attach);
+
+static struct dvb_frontend_ops s5h1432_ops = {
+
+	.info = {
+		.name			= "Samsung s5h1432 DVB-T Frontend",
+		.type			= FE_OFDM,
+		.frequency_min		= 177000000,
+		.frequency_max		= 858000000,
+		.frequency_stepsize	= 166666,
+		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+		FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+		FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+		FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
+		FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
+	},
+
+	.init                 = s5h1432_init,
+	.sleep                = s5h1432_sleep,
+	.set_frontend         = s5h1432_set_frontend,
+	.get_frontend         = s5h1432_get_frontend,
+	.get_tune_settings    = s5h1432_get_tune_settings,
+	.read_status          = s5h1432_read_status,
+	.read_ber             = s5h1432_read_ber,
+	.read_signal_strength = s5h1432_read_signal_strength,
+	.read_snr             = s5h1432_read_snr,
+	.read_ucblocks        = s5h1432_read_ucblocks,
+	.release              = s5h1432_release,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Enable verbose debug messages");
+
+MODULE_DESCRIPTION("Samsung s5h1432 DVB-T Demodulator driver");
+MODULE_AUTHOR("Bill Liu");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ */