V4L/DVB (9392): initial go at TDA8261 tuner

Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/frontends/tda8261.c b/drivers/media/dvb/frontends/tda8261.c
new file mode 100644 (file)
index 0000000..dc7dc02
--- /dev/null
+++ b/drivers/media/dvb/frontends/tda8261.c
@@ -0,0 +1,217 @@
+/*
+       TDA8261 8PSK/QPSK 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 "tda8261.h"
+
+struct tda8261_state {
+       struct dvb_frontend     *fe;
+       struct i2c_adapter      *i2c;
+       struct tda8261_config   *config;
+
+       /* state cache */
+       u32 frequency;
+       u32 bandwidth;
+};
+
+static int tda8261_read(struct tda8261_state *state, u8 *buf)
+{
+       struct tda8261_config *config = state->config;
+       int err = 0;
+       struct i2c_msg msg[] = {
+               { .addr = config->addr, .flags = 0,       .buf = NULL, .len = 0 },
+               { .addr = config->addr, .flags = I2C_M_RD,.buf = buf,  .len = 1 }
+       };
+
+       if ((err = i2c_transfer(state->i2c, msg, 2)) != 2)
+               printk("%s: read error, err=%d\n", __func__, err);
+
+       return err;
+}
+
+static int tda8261_write(struct tda8261_state *state, u8 *buf)
+{
+       struct tda8261_config *config = state->config;
+       int err = 0;
+       struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = 4 };
+
+       if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1)
+               printk("%s: read error, err=%d\n", __func__, err);
+
+       return err;
+}
+
+static int tda8261_get_status(struct dvb_frontend *fe, u32 *status)
+{
+       struct tda8261_state *state = fe->tuner_priv;
+       u8 result = 0;
+       int err = 0;
+
+       if ((err = tda8261_read(state, &result)) < 0) {
+               printk("%s: I/O Error\n", __func__);
+               return err;
+       }
+       if ((result >> 6) & 0x01) {
+               printk("%s: Tuner Phase Locked\n", __func__);
+               *status = 1;
+       }
+
+       return err;
+}
+
+static const u32 div_tab[] = { 2000, 1000,  500,  250,  125 }; /* kHz */
+static const u8  ref_div[] = { 0x00, 0x01, 0x02, 0x05, 0x07 };
+
+static int tda8261_get_state(struct dvb_frontend *fe,
+                            enum tuner_param param,
+                            struct tuner_state *tstate)
+{
+       struct tda8261_state *state = fe->tuner_priv;
+       int err = 0;
+
+       switch (param) {
+       case DVBFE_TUNER_FREQUENCY:
+               tstate->frequency = state->frequency;
+               break;
+       case DVBFE_TUNER_BANDWIDTH:
+               tstate->bandwidth = 60000000; /* FIXME! need to calculate Bandwidth */
+               break;
+       default:
+               printk("%s: Unknown parameter (param=%d)\n", __func__, param);
+               err = -EINVAL;
+               break;
+       }
+
+       return err;
+}
+
+static int tda8261_set_state(struct dvb_frontend *fe,
+                            enum tuner_param param,
+                            struct tuner_state *tstate)
+{
+       struct tda8261_state *state = fe->tuner_priv;
+       struct tda8261_config *config = state->config;
+       u32 frequency, N, status = 0;
+       u8 buf[4];
+       int err = 0;
+
+       if (param & DVBFE_TUNER_FREQUENCY) {
+               /**
+                * N = Max VCO Frequency / Channel Spacing
+                * Max VCO Frequency = VCO frequency + (channel spacing - 1)
+                * (to account for half channel spacing on either side)
+                */
+               frequency = tstate->frequency;
+               N = (frequency + (div_tab[config->step_size] - 1)) / div_tab[config->step_size];
+               buf[0] = (N >> 8) & 0xff;
+               buf[1] = N & 0xff;
+               buf[2] = (0x08 << 4) | ((ref_div[config->step_size] & 0x07) << 1);
+               buf[3] = 0xc0;
+               /* Set params */
+               printk("%s: Frequency=%d, Sending[ %02x %02x %02x %02x ]\n",
+                       __func__, frequency, buf[0], buf[1], buf[2], buf[3]);
+
+               if ((err = tda8261_write(state, buf)) < 0) {
+                       printk("%s: I/O Error\n", __func__);
+                       return err;
+               }
+               /* sleep for some time */
+               msleep(100);
+               /* check status */
+               if ((err = tda8261_get_status(fe, &status)) < 0) {
+                       printk("%s: I/O Error\n", __func__);
+                       return err;
+               }
+               if (status == 1)
+                       printk("%s: Tuner Phase locked: status=%d\n", __func__, status);
+               else
+                       printk("%s: No Phase lock: status=%d\n", __func__, status);
+       } else {
+               printk("%s: Unknown parameter (param=%d)\n", __func__, param);
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static int tda8261_release(struct dvb_frontend *fe)
+{
+       struct tda8261_state *state = fe->tuner_priv;
+
+       fe->tuner_priv = NULL;
+       kfree(state);
+       return 0;
+}
+
+static struct dvb_tuner_ops tda8261_ops = {
+
+       .info = {
+               .name           = "TDA8261",
+//             .tuner_name     = NULL,
+               .frequency_min  =  950000,
+               .frequency_max  = 2150000,
+               .frequency_step = 0
+       },
+
+       .set_state      = tda8261_set_state,
+       .get_state      = tda8261_get_state,
+       .release        = tda8261_release
+};
+
+struct dvb_frontend *tda8261_attach(struct dvb_frontend *fe,
+                                   struct tda8261_config *config,
+                                   struct i2c_adapter *i2c)
+{
+       struct tda8261_state *state = NULL;
+
+       if ((state = kzalloc(sizeof (struct tda8261_state), GFP_KERNEL)) == NULL)
+               goto exit;
+
+       state->config           = config;
+       state->i2c              = i2c;
+       state->fe               = fe;
+       fe->tuner_priv          = state;
+       fe->ops.tuner_ops       = tda8261_ops;
+
+       fe->ops.tuner_ops.info.frequency_step = div_tab[config->step_size];
+//     fe->ops.tuner_ops.tuner_name     = &config->buf;
+
+//     printk("%s: Attaching %s TDA8261 8PSK/QPSK tuner\n",
+//             __func__, fe->ops.tuner_ops.tuner_name);
+       printk("%s: Attaching TDA8261 8PSK/QPSK tuner\n", __func__);
+
+
+       return fe;
+
+exit:
+       kfree(state);
+       return NULL;
+}
+
+EXPORT_SYMBOL(tda8261_attach);
+MODULE_PARM_DESC(verbose, "Set verbosity level");
+
+MODULE_AUTHOR("Manu Abraham");
+MODULE_DESCRIPTION("TDA8261 8PSK/QPSK Tuner");
+MODULE_LICENSE("GPL");

diff --git a/drivers/media/dvb/frontends/tda8261.h b/drivers/media/dvb/frontends/tda8261.h
new file mode 100644 (file)
index 0000000..b8d8e37
--- /dev/null
+++ b/drivers/media/dvb/frontends/tda8261.h
@@ -0,0 +1,25 @@
+#ifndef __TDA8261_H
+#define __TDA8261_H
+
+enum tda8261_step {
+       TDA8261_STEP_2000 = 0,  /* 2000 kHz */
+       TDA8261_STEP_1000,      /* 1000 kHz */
+       TDA8261_STEP_500,       /*  500 kHz */
+       TDA8261_STEP_250,       /*  250 kHz */
+       TDA8261_STEP_125        /*  125 kHz */
+};
+
+struct tda8261_config {
+//     u8                      buf[16];
+       u8                      addr;
+       enum tda8261_step       step_size;
+};
+
+/* move out from here! */
+static const struct tda8261_config sd1878c_config = {
+//     .name           = "SD1878C",
+       .addr           = 0x60,
+       .step_size      = TDA8261_STEP_1000 /* kHz */
+};
+
+#endif// __TDA8261_H