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path: root/drivers/media/dvb-frontends/stv6110.c
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Diffstat (limited to 'drivers/media/dvb-frontends/stv6110.c')
-rw-r--r--drivers/media/dvb-frontends/stv6110.c451
1 files changed, 451 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/stv6110.c b/drivers/media/dvb-frontends/stv6110.c
new file mode 100644
index 00000000000..20b5fa92c53
--- /dev/null
+++ b/drivers/media/dvb-frontends/stv6110.c
@@ -0,0 +1,451 @@
+/*
+ * 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/slab.h>
+#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 clk_div;
+ u8 gain;
+ 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[] = {
+ {
+ .addr = priv->i2c_address,
+ .flags = 0,
+ .buf = reg,
+ .len = 1,
+ }, {
+ .addr = priv->i2c_address,
+ .flags = I2C_M_RD,
+ .buf = regs,
+ .len = len,
+ },
+ };
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ rc = i2c_transfer(priv->i2c, msg, 2);
+ if (rc != 2)
+ 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);
+
+ /* divisor value for the output clock */
+ priv->regs[RSTV6110_CTRL2] &= ~0xc0;
+ priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6);
+
+ 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;
+
+ 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;
+
+ priv->regs[RSTV6110_CTRL2] &= ~0x0f;
+ priv->regs[RSTV6110_CTRL2] |= (priv->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 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;
+
+ /* divisor value for the output clock */
+ reg0[2] &= ~0xc0;
+ reg0[2] |= (config->clk_div << 6);
+
+ 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;
+ priv->clk_div = config->clk_div;
+ priv->gain = config->gain;
+
+ 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");
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