summaryrefslogtreecommitdiff
path: root/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/dvb/dvb-usb/mxl111sf-tuner.c')
-rw-r--r--drivers/media/dvb/dvb-usb/mxl111sf-tuner.c524
1 files changed, 524 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c b/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c
new file mode 100644
index 00000000..72db6eef
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c
@@ -0,0 +1,524 @@
+/*
+ * mxl111sf-tuner.c - driver for the MaxLinear MXL111SF CMOS tuner
+ *
+ * Copyright (C) 2010 Michael Krufky <mkrufky@kernellabs.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 "mxl111sf-tuner.h"
+#include "mxl111sf-phy.h"
+#include "mxl111sf-reg.h"
+
+/* debug */
+static int mxl111sf_tuner_debug;
+module_param_named(debug, mxl111sf_tuner_debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able)).");
+
+#define mxl_dbg(fmt, arg...) \
+ if (mxl111sf_tuner_debug) \
+ mxl_printk(KERN_DEBUG, fmt, ##arg)
+
+/* ------------------------------------------------------------------------ */
+
+struct mxl111sf_tuner_state {
+ struct mxl111sf_state *mxl_state;
+
+ struct mxl111sf_tuner_config *cfg;
+
+ enum mxl_if_freq if_freq;
+
+ u32 frequency;
+ u32 bandwidth;
+};
+
+static int mxl111sf_tuner_read_reg(struct mxl111sf_tuner_state *state,
+ u8 addr, u8 *data)
+{
+ return (state->cfg->read_reg) ?
+ state->cfg->read_reg(state->mxl_state, addr, data) :
+ -EINVAL;
+}
+
+static int mxl111sf_tuner_write_reg(struct mxl111sf_tuner_state *state,
+ u8 addr, u8 data)
+{
+ return (state->cfg->write_reg) ?
+ state->cfg->write_reg(state->mxl_state, addr, data) :
+ -EINVAL;
+}
+
+static int mxl111sf_tuner_program_regs(struct mxl111sf_tuner_state *state,
+ struct mxl111sf_reg_ctrl_info *ctrl_reg_info)
+{
+ return (state->cfg->program_regs) ?
+ state->cfg->program_regs(state->mxl_state, ctrl_reg_info) :
+ -EINVAL;
+}
+
+static int mxl1x1sf_tuner_top_master_ctrl(struct mxl111sf_tuner_state *state,
+ int onoff)
+{
+ return (state->cfg->top_master_ctrl) ?
+ state->cfg->top_master_ctrl(state->mxl_state, onoff) :
+ -EINVAL;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static struct mxl111sf_reg_ctrl_info mxl_phy_tune_rf[] = {
+ {0x1d, 0x7f, 0x00}, /* channel bandwidth section 1/2/3,
+ DIG_MODEINDEX, _A, _CSF, */
+ {0x1e, 0xff, 0x00}, /* channel frequency (lo and fractional) */
+ {0x1f, 0xff, 0x00}, /* channel frequency (hi for integer portion) */
+ {0, 0, 0}
+};
+
+/* ------------------------------------------------------------------------ */
+
+static struct mxl111sf_reg_ctrl_info *mxl111sf_calc_phy_tune_regs(u32 freq,
+ u8 bw)
+{
+ u8 filt_bw;
+
+ /* set channel bandwidth */
+ switch (bw) {
+ case 0: /* ATSC */
+ filt_bw = 25;
+ break;
+ case 1: /* QAM */
+ filt_bw = 69;
+ break;
+ case 6:
+ filt_bw = 21;
+ break;
+ case 7:
+ filt_bw = 42;
+ break;
+ case 8:
+ filt_bw = 63;
+ break;
+ default:
+ err("%s: invalid bandwidth setting!", __func__);
+ return NULL;
+ }
+
+ /* calculate RF channel */
+ freq /= 1000000;
+
+ freq *= 64;
+#if 0
+ /* do round */
+ freq += 0.5;
+#endif
+ /* set bandwidth */
+ mxl_phy_tune_rf[0].data = filt_bw;
+
+ /* set RF */
+ mxl_phy_tune_rf[1].data = (freq & 0xff);
+ mxl_phy_tune_rf[2].data = (freq >> 8) & 0xff;
+
+ /* start tune */
+ return mxl_phy_tune_rf;
+}
+
+static int mxl1x1sf_tuner_set_if_output_freq(struct mxl111sf_tuner_state *state)
+{
+ int ret;
+ u8 ctrl;
+#if 0
+ u16 iffcw;
+ u32 if_freq;
+#endif
+ mxl_dbg("(IF polarity = %d, IF freq = 0x%02x)",
+ state->cfg->invert_spectrum, state->cfg->if_freq);
+
+ /* set IF polarity */
+ ctrl = state->cfg->invert_spectrum;
+
+ ctrl |= state->cfg->if_freq;
+
+ ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_SEL_REG, ctrl);
+ if (mxl_fail(ret))
+ goto fail;
+
+#if 0
+ if_freq /= 1000000;
+
+ /* do round */
+ if_freq += 0.5;
+
+ if (MXL_IF_LO == state->cfg->if_freq) {
+ ctrl = 0x08;
+ iffcw = (u16)(if_freq / (108 * 4096));
+ } else if (MXL_IF_HI == state->cfg->if_freq) {
+ ctrl = 0x08;
+ iffcw = (u16)(if_freq / (216 * 4096));
+ } else {
+ ctrl = 0;
+ iffcw = 0;
+ }
+
+ ctrl |= (iffcw >> 8);
+#endif
+ ret = mxl111sf_tuner_read_reg(state, V6_TUNER_IF_FCW_BYP_REG, &ctrl);
+ if (mxl_fail(ret))
+ goto fail;
+
+ ctrl &= 0xf0;
+ ctrl |= 0x90;
+
+ ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_FCW_BYP_REG, ctrl);
+ if (mxl_fail(ret))
+ goto fail;
+
+#if 0
+ ctrl = iffcw & 0x00ff;
+#endif
+ ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_FCW_REG, ctrl);
+ if (mxl_fail(ret))
+ goto fail;
+
+ state->if_freq = state->cfg->if_freq;
+fail:
+ return ret;
+}
+
+static int mxl1x1sf_tune_rf(struct dvb_frontend *fe, u32 freq, u8 bw)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ static struct mxl111sf_reg_ctrl_info *reg_ctrl_array;
+ int ret;
+ u8 mxl_mode;
+
+ mxl_dbg("(freq = %d, bw = 0x%x)", freq, bw);
+
+ /* stop tune */
+ ret = mxl111sf_tuner_write_reg(state, START_TUNE_REG, 0);
+ if (mxl_fail(ret))
+ goto fail;
+
+ /* check device mode */
+ ret = mxl111sf_tuner_read_reg(state, MXL_MODE_REG, &mxl_mode);
+ if (mxl_fail(ret))
+ goto fail;
+
+ /* Fill out registers for channel tune */
+ reg_ctrl_array = mxl111sf_calc_phy_tune_regs(freq, bw);
+ if (!reg_ctrl_array)
+ return -EINVAL;
+
+ ret = mxl111sf_tuner_program_regs(state, reg_ctrl_array);
+ if (mxl_fail(ret))
+ goto fail;
+
+ if ((mxl_mode & MXL_DEV_MODE_MASK) == MXL_TUNER_MODE) {
+ /* IF tuner mode only */
+ mxl1x1sf_tuner_top_master_ctrl(state, 0);
+ mxl1x1sf_tuner_top_master_ctrl(state, 1);
+ mxl1x1sf_tuner_set_if_output_freq(state);
+ }
+
+ ret = mxl111sf_tuner_write_reg(state, START_TUNE_REG, 1);
+ if (mxl_fail(ret))
+ goto fail;
+
+ if (state->cfg->ant_hunt)
+ state->cfg->ant_hunt(fe);
+fail:
+ return ret;
+}
+
+static int mxl1x1sf_tuner_get_lock_status(struct mxl111sf_tuner_state *state,
+ int *rf_synth_lock,
+ int *ref_synth_lock)
+{
+ int ret;
+ u8 data;
+
+ *rf_synth_lock = 0;
+ *ref_synth_lock = 0;
+
+ ret = mxl111sf_tuner_read_reg(state, V6_RF_LOCK_STATUS_REG, &data);
+ if (mxl_fail(ret))
+ goto fail;
+
+ *ref_synth_lock = ((data & 0x03) == 0x03) ? 1 : 0;
+ *rf_synth_lock = ((data & 0x0c) == 0x0c) ? 1 : 0;
+fail:
+ return ret;
+}
+
+#if 0
+static int mxl1x1sf_tuner_loop_thru_ctrl(struct mxl111sf_tuner_state *state,
+ int onoff)
+{
+ return mxl111sf_tuner_write_reg(state, V6_TUNER_LOOP_THRU_CTRL_REG,
+ onoff ? 1 : 0);
+}
+#endif
+
+/* ------------------------------------------------------------------------ */
+
+static int mxl111sf_tuner_set_params(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ u32 delsys = c->delivery_system;
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ int ret;
+ u8 bw;
+
+ mxl_dbg("()");
+
+ switch (delsys) {
+ case SYS_ATSC:
+ bw = 0; /* ATSC */
+ break;
+ case SYS_DVBC_ANNEX_B:
+ bw = 1; /* US CABLE */
+ break;
+ case SYS_DVBT:
+ switch (c->bandwidth_hz) {
+ case 6000000:
+ bw = 6;
+ break;
+ case 7000000:
+ bw = 7;
+ break;
+ case 8000000:
+ bw = 8;
+ break;
+ default:
+ err("%s: bandwidth not set!", __func__);
+ return -EINVAL;
+ }
+ break;
+ default:
+ err("%s: modulation type not supported!", __func__);
+ return -EINVAL;
+ }
+ ret = mxl1x1sf_tune_rf(fe, c->frequency, bw);
+ if (mxl_fail(ret))
+ goto fail;
+
+ state->frequency = c->frequency;
+ state->bandwidth = c->bandwidth_hz;
+fail:
+ return ret;
+}
+
+/* ------------------------------------------------------------------------ */
+
+#if 0
+static int mxl111sf_tuner_init(struct dvb_frontend *fe)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ int ret;
+
+ /* wake from standby handled by usb driver */
+
+ return ret;
+}
+
+static int mxl111sf_tuner_sleep(struct dvb_frontend *fe)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ int ret;
+
+ /* enter standby mode handled by usb driver */
+
+ return ret;
+}
+#endif
+
+/* ------------------------------------------------------------------------ */
+
+static int mxl111sf_tuner_get_status(struct dvb_frontend *fe, u32 *status)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ int rf_locked, ref_locked, ret;
+
+ *status = 0;
+
+ ret = mxl1x1sf_tuner_get_lock_status(state, &rf_locked, &ref_locked);
+ if (mxl_fail(ret))
+ goto fail;
+ mxl_info("%s%s", rf_locked ? "rf locked " : "",
+ ref_locked ? "ref locked" : "");
+
+ if ((rf_locked) || (ref_locked))
+ *status |= TUNER_STATUS_LOCKED;
+fail:
+ return ret;
+}
+
+static int mxl111sf_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ u8 val1, val2;
+ int ret;
+
+ *strength = 0;
+
+ ret = mxl111sf_tuner_write_reg(state, 0x00, 0x02);
+ if (mxl_fail(ret))
+ goto fail;
+ ret = mxl111sf_tuner_read_reg(state, V6_DIG_RF_PWR_LSB_REG, &val1);
+ if (mxl_fail(ret))
+ goto fail;
+ ret = mxl111sf_tuner_read_reg(state, V6_DIG_RF_PWR_MSB_REG, &val2);
+ if (mxl_fail(ret))
+ goto fail;
+
+ *strength = val1 | ((val2 & 0x07) << 8);
+fail:
+ ret = mxl111sf_tuner_write_reg(state, 0x00, 0x00);
+ mxl_fail(ret);
+
+ return ret;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int mxl111sf_tuner_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ *frequency = state->frequency;
+ return 0;
+}
+
+static int mxl111sf_tuner_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ *bandwidth = state->bandwidth;
+ return 0;
+}
+
+static int mxl111sf_tuner_get_if_frequency(struct dvb_frontend *fe,
+ u32 *frequency)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+
+ *frequency = 0;
+
+ switch (state->if_freq) {
+ case MXL_IF_4_0: /* 4.0 MHz */
+ *frequency = 4000000;
+ break;
+ case MXL_IF_4_5: /* 4.5 MHz */
+ *frequency = 4500000;
+ break;
+ case MXL_IF_4_57: /* 4.57 MHz */
+ *frequency = 4570000;
+ break;
+ case MXL_IF_5_0: /* 5.0 MHz */
+ *frequency = 5000000;
+ break;
+ case MXL_IF_5_38: /* 5.38 MHz */
+ *frequency = 5380000;
+ break;
+ case MXL_IF_6_0: /* 6.0 MHz */
+ *frequency = 6000000;
+ break;
+ case MXL_IF_6_28: /* 6.28 MHz */
+ *frequency = 6280000;
+ break;
+ case MXL_IF_7_2: /* 7.2 MHz */
+ *frequency = 7200000;
+ break;
+ case MXL_IF_35_25: /* 35.25 MHz */
+ *frequency = 35250000;
+ break;
+ case MXL_IF_36: /* 36 MHz */
+ *frequency = 36000000;
+ break;
+ case MXL_IF_36_15: /* 36.15 MHz */
+ *frequency = 36150000;
+ break;
+ case MXL_IF_44: /* 44 MHz */
+ *frequency = 44000000;
+ break;
+ }
+ return 0;
+}
+
+static int mxl111sf_tuner_release(struct dvb_frontend *fe)
+{
+ struct mxl111sf_tuner_state *state = fe->tuner_priv;
+ mxl_dbg("()");
+ kfree(state);
+ fe->tuner_priv = NULL;
+ return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static struct dvb_tuner_ops mxl111sf_tuner_tuner_ops = {
+ .info = {
+ .name = "MaxLinear MxL111SF",
+#if 0
+ .frequency_min = ,
+ .frequency_max = ,
+ .frequency_step = ,
+#endif
+ },
+#if 0
+ .init = mxl111sf_tuner_init,
+ .sleep = mxl111sf_tuner_sleep,
+#endif
+ .set_params = mxl111sf_tuner_set_params,
+ .get_status = mxl111sf_tuner_get_status,
+ .get_rf_strength = mxl111sf_get_rf_strength,
+ .get_frequency = mxl111sf_tuner_get_frequency,
+ .get_bandwidth = mxl111sf_tuner_get_bandwidth,
+ .get_if_frequency = mxl111sf_tuner_get_if_frequency,
+ .release = mxl111sf_tuner_release,
+};
+
+struct dvb_frontend *mxl111sf_tuner_attach(struct dvb_frontend *fe,
+ struct mxl111sf_state *mxl_state,
+ struct mxl111sf_tuner_config *cfg)
+{
+ struct mxl111sf_tuner_state *state = NULL;
+
+ mxl_dbg("()");
+
+ state = kzalloc(sizeof(struct mxl111sf_tuner_state), GFP_KERNEL);
+ if (state == NULL)
+ return NULL;
+
+ state->mxl_state = mxl_state;
+ state->cfg = cfg;
+
+ memcpy(&fe->ops.tuner_ops, &mxl111sf_tuner_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ fe->tuner_priv = state;
+ return fe;
+}
+EXPORT_SYMBOL_GPL(mxl111sf_tuner_attach);
+
+MODULE_DESCRIPTION("MaxLinear MxL111SF CMOS tuner driver");
+MODULE_AUTHOR("Michael Krufky <mkrufky@kernellabs.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.1");
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
generated by cgit (git 2.34.1) at 2024-12-22 10:13:43 +0000