V4L/DVB (10799): Add support for ST STV6110 silicon tuner.

The tuner is used in NetUP Dual DVB-S2 CI card.
http://linuxtv.org/wiki/index.php/NetUP_Dual_DVB_S2_CI

Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
[mchehab@redhat.com: removed a wrong header: "cx23885.h"]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 526 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig
index 00269560793a..649ac75aaefa 100644
--- a/drivers/media/dvb/frontends/Kconfig
+++ b/drivers/media/dvb/frontends/Kconfig
@@ -83,6 +83,13 @@ config DVB_STV0299
         help
           A DVB-S tuner module. Say Y when you want to support this frontend.
 
+config DVB_STV6110
+        tristate "ST STV6110 silicon tuner"
+        depends on DVB_CORE && I2C
+        default m if DVB_FE_CUSTOMISE
+          help
+          A DVB-S silicon tuner module. Say Y when you want to support this tuner.
+
 config DVB_TDA8083
         tristate "Philips TDA8083 based"
         depends on DVB_CORE && I2C
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index af7bdf0ad4c7..1d180fc71023 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -64,4 +64,5 @@ obj-$(CONFIG_DVB_SI21XX) += si21xx.o
 obj-$(CONFIG_DVB_STV0288) += stv0288.o
 obj-$(CONFIG_DVB_STB6000) += stb6000.o
 obj-$(CONFIG_DVB_S921) += s921.o
+obj-$(CONFIG_DVB_STV6110) += stv6110.o
 
diff --git a/drivers/media/dvb/frontends/stv6110.c b/drivers/media/dvb/frontends/stv6110.c
new file mode 100644
index 000000000000..70efac869d28
--- /dev/null
+++ b/drivers/media/dvb/frontends/stv6110.c
@@ -0,0 +1,456 @@
+/*
+ * stv6110.c
+ *
+ * Driver for ST STV6110 satellite tuner IC.
+ *
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * 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/module.h>
+#include <linux/dvb/frontend.h>
+
+#include <linux/types.h>
+
+#include "stv6110.h"
+
+static int debug;
+
+struct stv6110_priv {
+        int i2c_address;
+        struct i2c_adapter *i2c;
+
+        u32 mclk;
+        u8 regs[8];
+};
+
+#define dprintk(args...) \
+        do { \
+                if (debug) \
+                        printk(KERN_DEBUG args); \
+        } while (0)
+
+static s32 abssub(s32 a, s32 b)
+{
+        if (a > b)
+                return a - b;
+        else
+                return b - a;
+};
+
+static int stv6110_release(struct dvb_frontend *fe)
+{
+        kfree(fe->tuner_priv);
+        fe->tuner_priv = NULL;
+        return 0;
+}
+
+static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
+                                                        int start, int len)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        int rc;
+        u8 cmdbuf[len + 1];
+        struct i2c_msg msg = {
+                .addr   = priv->i2c_address,
+                .flags  = 0,
+                .buf    = cmdbuf,
+                .len    = len + 1
+        };
+
+        dprintk("%s\n", __func__);
+
+        if (start + len > 8)
+                return -EINVAL;
+
+        memcpy(&cmdbuf[1], buf, len);
+        cmdbuf[0] = start;
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        rc = i2c_transfer(priv->i2c, &msg, 1);
+        if (rc != 1)
+                dprintk("%s: i2c error\n", __func__);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        return 0;
+}
+
+static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
+                                                        int start, int len)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        int rc;
+        u8 reg[] = { start };
+        struct i2c_msg msg_wr = {
+                .addr   = priv->i2c_address,
+                .flags  = 0,
+                .buf    = reg,
+                .len    = 1,
+        };
+
+        struct i2c_msg msg_rd = {
+                .addr   = priv->i2c_address,
+                .flags  = I2C_M_RD,
+                .buf    = regs,
+                .len    = len,
+        };
+        /* write subaddr */
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        rc = i2c_transfer(priv->i2c, &msg_wr, 1);
+        if (rc != 1)
+                dprintk("%s: i2c error\n", __func__);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+        /* read registers */
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        rc = i2c_transfer(priv->i2c, &msg_rd, 1);
+        if (rc != 1)
+                dprintk("%s: i2c error\n", __func__);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        memcpy(&priv->regs[start], regs, len);
+
+        return 0;
+}
+
+static int stv6110_read_reg(struct dvb_frontend *fe, int start)
+{
+        u8 buf[] = { 0 };
+        stv6110_read_regs(fe, buf, start, 1);
+
+        return buf[0];
+}
+
+static int stv6110_sleep(struct dvb_frontend *fe)
+{
+        u8 reg[] = { 0 };
+        stv6110_write_regs(fe, reg, 0, 1);
+
+        return 0;
+}
+
+static u32 carrier_width(u32 symbol_rate, fe_rolloff_t rolloff)
+{
+        u32 rlf;
+
+        switch (rolloff) {
+        case ROLLOFF_20:
+                rlf = 20;
+                break;
+        case ROLLOFF_25:
+                rlf = 25;
+                break;
+        default:
+                rlf = 35;
+                break;
+        }
+
+        return symbol_rate  + ((symbol_rate * rlf) / 100);
+}
+
+static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        u8 r8, ret = 0x04;
+        int i;
+
+        if ((bandwidth / 2) > 36000000) /*BW/2 max=31+5=36 mhz for r8=31*/
+                r8 = 31;
+        else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
+                r8 = 0;
+        else /*if 5 < BW/2 < 36*/
+                r8 = (bandwidth / 2) / 1000000 - 5;
+
+        /* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
+        /* ctrl3, CF = r8 Set the LPF value */
+        priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f);
+        priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f);
+        stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
+        /* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
+        priv->regs[RSTV6110_STAT1] |= 0x02;
+        stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
+
+        i = 0;
+        /* Wait for CALRCSTRT == 0 */
+        while ((i < 10) && (ret != 0)) {
+                ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
+                mdelay(1);      /* wait for LPF auto calibration */
+                i++;
+        }
+
+        /* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */
+        priv->regs[RSTV6110_CTRL3] |= (1 << 6);
+        stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
+        return 0;
+}
+
+static int stv6110_init(struct dvb_frontend *fe)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
+
+        memcpy(priv->regs, buf0, 8);
+        /* K = (Reference / 1000000) - 16 */
+        priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
+        priv->regs[RSTV6110_CTRL1] |=
+                                ((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
+
+        stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
+        msleep(1);
+        stv6110_set_bandwidth(fe, 72000000);
+
+        return 0;
+}
+
+static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        u32 nbsteps, divider, psd2, freq;
+        u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+        stv6110_read_regs(fe, regs, 0, 8);
+        /*N*/
+        divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
+        divider += priv->regs[RSTV6110_TUNING1];
+
+        /*R*/
+        nbsteps  = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
+        /*p*/
+        psd2  = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
+
+        freq = divider * (priv->mclk / 1000);
+        freq /= (1 << (nbsteps + psd2));
+        freq /= 4;
+
+        *frequency = freq;
+
+        return 0;
+}
+
+static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        u8 ret = 0x04;
+        u32 divider, ref, p, presc, i, result_freq, vco_freq;
+        s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
+        s32 srate; u8 gain;
+
+        dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
+                                                frequency, priv->mclk);
+
+        /* K = (Reference / 1000000) - 16 */
+        priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
+        priv->regs[RSTV6110_CTRL1] |=
+                                ((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
+
+        /* BB_GAIN = db/2 */
+        if (fe->ops.set_property && fe->ops.get_property) {
+                srate = c->symbol_rate;
+                dprintk("%s: Get Frontend parameters: srate=%d\n",
+                                                        __func__, srate);
+        } else
+                srate = 15000000;
+
+        if (srate >= 15000000)
+                gain = 3; /* +6 dB */
+        else if (srate >= 5000000)
+                gain = 3; /* +6 dB */
+        else
+                gain = 3; /* +6 dB */
+
+        priv->regs[RSTV6110_CTRL2] &= ~0x0f;
+        priv->regs[RSTV6110_CTRL2] |= (gain & 0x0f);
+
+        if (frequency <= 1023000) {
+                p = 1;
+                presc = 0;
+        } else if (frequency <= 1300000) {
+                p = 1;
+                presc = 1;
+        } else if (frequency <= 2046000) {
+                p = 0;
+                presc = 0;
+        } else {
+                p = 0;
+                presc = 1;
+        }
+        /* DIV4SEL = p*/
+        priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
+        priv->regs[RSTV6110_TUNING2] |= (p << 4);
+
+        /* PRESC32ON = presc */
+        priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
+        priv->regs[RSTV6110_TUNING2] |= (presc << 5);
+
+        p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
+        for (r_div = 0; r_div <= 3; r_div++) {
+                p_calc = (priv->mclk / 100000);
+                p_calc /= (1 << (r_div + 1));
+                if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
+                        r_div_opt = r_div;
+
+                p_calc_opt = (priv->mclk / 100000);
+                p_calc_opt /= (1 << (r_div_opt + 1));
+        }
+
+        ref = priv->mclk / ((1 << (r_div_opt + 1))  * (1 << (p + 1)));
+        divider = (((frequency * 1000) + (ref >> 1)) / ref);
+
+        /* RDIV = r_div_opt */
+        priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
+        priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6);
+
+        /* NDIV_MSB = MSB(divider) */
+        priv->regs[RSTV6110_TUNING2] &= ~0x0f;
+        priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f);
+
+        /* NDIV_LSB, LSB(divider) */
+        priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
+
+        /* CALVCOSTRT = 1 VCO Auto Calibration */
+        priv->regs[RSTV6110_STAT1] |= 0x04;
+        stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
+                                                RSTV6110_CTRL1, 8);
+
+        i = 0;
+        /* Wait for CALVCOSTRT == 0 */
+        while ((i < 10) && (ret != 0)) {
+                ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
+                msleep(1); /* wait for VCO auto calibration */
+                i++;
+        }
+
+        ret = stv6110_read_reg(fe, RSTV6110_STAT1);
+        stv6110_get_frequency(fe, &result_freq);
+
+        vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
+        dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
+                                                ret, result_freq, vco_freq);
+
+        return 0;
+}
+
+static int stv6110_set_params(struct dvb_frontend *fe,
+                              struct dvb_frontend_parameters *params)
+{
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
+
+        stv6110_set_frequency(fe, c->frequency);
+        stv6110_set_bandwidth(fe, bandwidth);
+
+        return 0;
+}
+
+static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+        struct stv6110_priv *priv = fe->tuner_priv;
+        u8 r8 = 0;
+        u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+        stv6110_read_regs(fe, regs, 0, 8);
+
+        /* CF */
+        r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
+        *bandwidth = (r8 + 5) * 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */
+
+        return 0;
+}
+
+static struct dvb_tuner_ops stv6110_tuner_ops = {
+        .info = {
+                .name = "ST STV6110",
+                .frequency_min = 950000,
+                .frequency_max = 2150000,
+                .frequency_step = 1000,
+        },
+        .init = stv6110_init,
+        .release = stv6110_release,
+        .sleep = stv6110_sleep,
+        .set_params = stv6110_set_params,
+        .get_frequency = stv6110_get_frequency,
+        .set_frequency = stv6110_set_frequency,
+        .get_bandwidth = stv6110_get_bandwidth,
+        .set_bandwidth = stv6110_set_bandwidth,
+
+};
+
+struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
+                                        const struct stv6110_config *config,
+                                        struct i2c_adapter *i2c)
+{
+        struct stv6110_priv *priv = NULL;
+        u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
+
+        struct i2c_msg msg[] = {
+                {
+                        .addr = config->i2c_address,
+                        .flags = 0,
+                        .buf = reg0,
+                        .len = 9
+                }
+        };
+        int ret;
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 1);
+
+        ret = i2c_transfer(i2c, msg, 1);
+
+        if (fe->ops.i2c_gate_ctrl)
+                fe->ops.i2c_gate_ctrl(fe, 0);
+
+        if (ret != 1)
+                return NULL;
+
+        priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
+        if (priv == NULL)
+                return NULL;
+
+        priv->i2c_address = config->i2c_address;
+        priv->i2c = i2c;
+        priv->mclk = config->mclk;
+
+        memcpy(&priv->regs, &reg0[1], 8);
+
+        memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
+                                sizeof(struct dvb_tuner_ops));
+        fe->tuner_priv = priv;
+        printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
+
+        return fe;
+}
+EXPORT_SYMBOL(stv6110_attach);
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("ST STV6110 driver");
+MODULE_AUTHOR("Igor M. Liplianin");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/dvb/frontends/stv6110.h b/drivers/media/dvb/frontends/stv6110.h
new file mode 100644
index 000000000000..1c0314d6aa55
--- /dev/null
+++ b/drivers/media/dvb/frontends/stv6110.h
@@ -0,0 +1,62 @@
+/*
+ * stv6110.h
+ *
+ * Driver for ST STV6110 satellite tuner IC.
+ *
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * 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 __DVB_STV6110_H__
+#define __DVB_STV6110_H__
+
+#include <linux/i2c.h>
+#include "dvb_frontend.h"
+
+/* registers */
+#define RSTV6110_CTRL1          0
+#define RSTV6110_CTRL2          1
+#define RSTV6110_TUNING1        2
+#define RSTV6110_TUNING2        3
+#define RSTV6110_CTRL3          4
+#define RSTV6110_STAT1          5
+#define RSTV6110_STAT2          6
+#define RSTV6110_STAT3          7
+
+struct stv6110_config {
+        u8 i2c_address;
+        u32 mclk;
+        int iq_wiring;
+};
+
+#if defined(CONFIG_DVB_STV6110) || (defined(CONFIG_DVB_STV6110_MODULE) \
+                                                        && defined(MODULE))
+extern struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
+                                        const struct stv6110_config *config,
+                                        struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
+                                        const struct stv6110_config *config,
+                                        struct i2c_adapter *i2c)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+        return NULL;
+}
+#endif
+
+#endif