1 files changed, 257 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/tda665x.c b/drivers/media/dvb/frontends/tda665x.c
new file mode 100644
index 000000000000..87d52739c828
--- /dev/null
+++ b/drivers/media/dvb/frontends/tda665x.c
@@ -0,0 +1,257 @@
+/*
+        TDA665x tuner driver
+        Copyright (C) Manu Abraham (abraham.manu@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.
+*/
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "dvb_frontend.h"
+#include "tda665x.h"
+
+struct tda665x_state {
+        struct dvb_frontend             *fe;
+        struct i2c_adapter              *i2c;
+        const struct tda665x_config     *config;
+
+        u32 frequency;
+        u32 bandwidth;
+};
+
+static int tda665x_read(struct tda665x_state *state, u8 *buf)
+{
+        const struct tda665x_config *config = state->config;
+        int err = 0;
+        struct i2c_msg msg = { .addr = config->addr, .flags = I2C_M_RD, .buf = buf, .len = 2 };
+
+        err = i2c_transfer(state->i2c, &msg, 1);
+        if (err != 1)
+                goto exit;
+
+        return err;
+exit:
+        printk(KERN_ERR "%s: I/O Error err=<%d>\n", __func__, err);
+        return err;
+}
+
+static int tda665x_write(struct tda665x_state *state, u8 *buf, u8 length)
+{
+        const struct tda665x_config *config = state->config;
+        int err = 0;
+        struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = length };
+
+        err = i2c_transfer(state->i2c, &msg, 1);
+        if (err != 1)
+                goto exit;
+
+        return err;
+exit:
+        printk(KERN_ERR "%s: I/O Error err=<%d>\n", __func__, err);
+        return err;
+}
+
+static int tda665x_get_state(struct dvb_frontend *fe,
+                             enum tuner_param param,
+                             struct tuner_state *tstate)
+{
+        struct tda665x_state *state = fe->tuner_priv;
+        int err = 0;
+
+        switch (param) {
+        case DVBFE_TUNER_FREQUENCY:
+                tstate->frequency = state->frequency;
+                break;
+        case DVBFE_TUNER_BANDWIDTH:
+                break;
+        default:
+                printk(KERN_ERR "%s: Unknown parameter (param=%d)\n", __func__, param);
+                err = -EINVAL;
+                break;
+        }
+
+        return err;
+}
+
+static int tda665x_get_status(struct dvb_frontend *fe, u32 *status)
+{
+        struct tda665x_state *state = fe->tuner_priv;
+        u8 result = 0;
+        int err = 0;
+
+        *status = 0;
+
+        err = tda665x_read(state, &result);
+        if (err < 0)
+                goto exit;
+
+        if ((result >> 6) & 0x01) {
+                printk(KERN_DEBUG "%s: Tuner Phase Locked\n", __func__);
+                *status = 1;
+        }
+
+        return err;
+exit:
+        printk(KERN_ERR "%s: I/O Error\n", __func__);
+        return err;
+}
+
+static int tda665x_set_state(struct dvb_frontend *fe,
+                             enum tuner_param param,
+                             struct tuner_state *tstate)
+{
+        struct tda665x_state *state = fe->tuner_priv;
+        const struct tda665x_config *config = state->config;
+        u32 frequency, status = 0;
+        u8 buf[4];
+        int err = 0;
+
+        if (param & DVBFE_TUNER_FREQUENCY) {
+
+                frequency = tstate->frequency;
+                if ((frequency < config->frequency_max) || (frequency > config->frequency_min)) {
+                        printk(KERN_ERR "%s: Frequency beyond limits, frequency=%d\n", __func__, frequency);
+                        return -EINVAL;
+                }
+
+                frequency += config->frequency_offst;
+                frequency *= config->ref_multiplier;
+                frequency += config->ref_divider >> 1;
+                frequency /= config->ref_divider;
+
+                buf[0] = (u8) (frequency & 0x7f00) >> 8;
+                buf[1] = (u8) (frequency & 0x00ff) >> 0;
+                buf[2] = 0x80 | 0x40 | 0x02;
+                buf[3] = 0x00;
+
+                /* restore frequency */
+                frequency = tstate->frequency;
+
+                if (frequency < 153000000) {
+                        /* VHF-L */
+                        buf[3] |= 0x01; /* fc, Low Band, 47 - 153 MHz */
+                        if (frequency < 68000000)
+                                buf[3] |= 0x40; /* 83uA */
+                        if (frequency < 1040000000)
+                                buf[3] |= 0x60; /* 122uA */
+                        if (frequency < 1250000000)
+                                buf[3] |= 0x80; /* 163uA */
+                        else
+                                buf[3] |= 0xa0; /* 254uA */
+                } else if (frequency < 438000000) {
+                        /* VHF-H */
+                        buf[3] |= 0x02; /* fc, Mid Band, 153 - 438 MHz */
+                        if (frequency < 230000000)
+                                buf[3] |= 0x40;
+                        if (frequency < 300000000)
+                                buf[3] |= 0x60;
+                        else
+                                buf[3] |= 0x80;
+                } else {
+                        /* UHF */
+                        buf[3] |= 0x04; /* fc, High Band, 438 - 862 MHz */
+                        if (frequency < 470000000)
+                                buf[3] |= 0x60;
+                        if (frequency < 526000000)
+                                buf[3] |= 0x80;
+                        else
+                                buf[3] |= 0xa0;
+                }
+
+                /* Set params */
+                err = tda665x_write(state, buf, 5);
+                if (err < 0)
+                        goto exit;
+
+                /* sleep for some time */
+                printk(KERN_DEBUG "%s: Waiting to Phase LOCK\n", __func__);
+                msleep(20);
+                /* check status */
+                err = tda665x_get_status(fe, &status);
+                if (err < 0)
+                        goto exit;
+
+                if (status == 1) {
+                        printk(KERN_DEBUG "%s: Tuner Phase locked: status=%d\n", __func__, status);
+                        state->frequency = frequency; /* cache successful state */
+                } else {
+                        printk(KERN_ERR "%s: No Phase lock: status=%d\n", __func__, status);
+                }
+        } else {
+                printk(KERN_ERR "%s: Unknown parameter (param=%d)\n", __func__, param);
+                return -EINVAL;
+        }
+
+        return 0;
+exit:
+        printk(KERN_ERR "%s: I/O Error\n", __func__);
+        return err;
+}
+
+static int tda665x_release(struct dvb_frontend *fe)
+{
+        struct tda665x_state *state = fe->tuner_priv;
+
+        fe->tuner_priv = NULL;
+        kfree(state);
+        return 0;
+}
+
+static struct dvb_tuner_ops tda665x_ops = {
+
+        .set_state      = tda665x_set_state,
+        .get_state      = tda665x_get_state,
+        .get_status     = tda665x_get_status,
+        .release        = tda665x_release
+};
+
+struct dvb_frontend *tda665x_attach(struct dvb_frontend *fe,
+                                    const struct tda665x_config *config,
+                                    struct i2c_adapter *i2c)
+{
+        struct tda665x_state *state = NULL;
+        struct dvb_tuner_info *info;
+
+        state = kzalloc(sizeof(struct tda665x_state), GFP_KERNEL);
+        if (state == NULL)
+                goto exit;
+
+        state->config           = config;
+        state->i2c              = i2c;
+        state->fe               = fe;
+        fe->tuner_priv          = state;
+        fe->ops.tuner_ops       = tda665x_ops;
+        info                     = &fe->ops.tuner_ops.info;
+
+        memcpy(info->name, config->name, sizeof(config->name));
+        info->frequency_min     = config->frequency_min;
+        info->frequency_max     = config->frequency_max;
+        info->frequency_step    = config->frequency_offst;
+
+        printk(KERN_DEBUG "%s: Attaching TDA665x (%s) tuner\n", __func__, info->name);
+
+        return fe;
+
+exit:
+        kfree(state);
+        return NULL;
+}
+EXPORT_SYMBOL(tda665x_attach);
+
+MODULE_DESCRIPTION("TDA665x driver");
+MODULE_AUTHOR("Manu Abraham");
+MODULE_LICENSE("GPL");