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Diffstat (limited to 'drivers/media/dvb-frontends/or51132.c')
-rw-r--r--drivers/media/dvb-frontends/or51132.c608
1 files changed, 608 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/or51132.c b/drivers/media/dvb-frontends/or51132.c
new file mode 100644
index 0000000000..74e04c7cca
--- /dev/null
+++ b/drivers/media/dvb-frontends/or51132.c
@@ -0,0 +1,608 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Support for OR51132 (pcHDTV HD-3000) - VSB/QAM
+ *
+ * Copyright (C) 2007 Trent Piepho <xyzzy@speakeasy.org>
+ *
+ * Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
+ *
+ * Based on code from Jack Kelliher (kelliher@xmission.com)
+ * Copyright (C) 2002 & pcHDTV, inc.
+*/
+
+/*
+ * This driver needs two external firmware files. Please copy
+ * "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to
+ * /usr/lib/hotplug/firmware/ or /lib/firmware/
+ * (depending on configuration of firmware hotplug).
+ */
+#define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw"
+#define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+
+#include <linux/int_log.h>
+#include <media/dvb_frontend.h>
+#include "or51132.h"
+
+static int debug;
+#define dprintk(args...) \
+ do { \
+ if (debug) printk(KERN_DEBUG "or51132: " args); \
+ } while (0)
+
+
+struct or51132_state
+{
+ struct i2c_adapter* i2c;
+
+ /* Configuration settings */
+ const struct or51132_config* config;
+
+ struct dvb_frontend frontend;
+
+ /* Demodulator private data */
+ enum fe_modulation current_modulation;
+ u32 snr; /* Result of last SNR calculation */
+
+ /* Tuner private data */
+ u32 current_frequency;
+};
+
+
+/* Write buffer to demod */
+static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len)
+{
+ int err;
+ struct i2c_msg msg = { .addr = state->config->demod_address,
+ .flags = 0, .buf = (u8*)buf, .len = len };
+
+ /* msleep(20); */ /* doesn't appear to be necessary */
+ if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
+ printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n",
+ msg.addr, msg.len, err);
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+/* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00);
+ Less code and more efficient that loading a buffer on the stack with
+ the bytes to send and then calling or51132_writebuf() on that. */
+#define or51132_writebytes(state, data...) \
+ ({ static const u8 _data[] = {data}; \
+ or51132_writebuf(state, _data, sizeof(_data)); })
+
+/* Read data from demod into buffer. Returns 0 on success. */
+static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len)
+{
+ int err;
+ struct i2c_msg msg = { .addr = state->config->demod_address,
+ .flags = I2C_M_RD, .buf = buf, .len = len };
+
+ /* msleep(20); */ /* doesn't appear to be necessary */
+ if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
+ printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n",
+ msg.addr, msg.len, err);
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+/* Reads a 16-bit demod register. Returns <0 on error. */
+static int or51132_readreg(struct or51132_state *state, u8 reg)
+{
+ u8 buf[2] = { 0x04, reg };
+ struct i2c_msg msg[2] = {
+ {.addr = state->config->demod_address, .flags = 0,
+ .buf = buf, .len = 2 },
+ {.addr = state->config->demod_address, .flags = I2C_M_RD,
+ .buf = buf, .len = 2 }};
+ int err;
+
+ if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) {
+ printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n",
+ reg, err);
+ return -EREMOTEIO;
+ }
+ return buf[0] | (buf[1] << 8);
+}
+
+static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
+{
+ struct or51132_state* state = fe->demodulator_priv;
+ static const u8 run_buf[] = {0x7F,0x01};
+ u8 rec_buf[8];
+ u32 firmwareAsize, firmwareBsize;
+ int i,ret;
+
+ dprintk("Firmware is %zd bytes\n",fw->size);
+
+ /* Get size of firmware A and B */
+ firmwareAsize = le32_to_cpu(*((__le32*)fw->data));
+ dprintk("FirmwareA is %i bytes\n",firmwareAsize);
+ firmwareBsize = le32_to_cpu(*((__le32*)(fw->data+4)));
+ dprintk("FirmwareB is %i bytes\n",firmwareBsize);
+
+ /* Upload firmware */
+ if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) {
+ printk(KERN_WARNING "or51132: load_firmware error 1\n");
+ return ret;
+ }
+ if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize],
+ firmwareBsize))) {
+ printk(KERN_WARNING "or51132: load_firmware error 2\n");
+ return ret;
+ }
+
+ if ((ret = or51132_writebuf(state, run_buf, 2))) {
+ printk(KERN_WARNING "or51132: load_firmware error 3\n");
+ return ret;
+ }
+ if ((ret = or51132_writebuf(state, run_buf, 2))) {
+ printk(KERN_WARNING "or51132: load_firmware error 4\n");
+ return ret;
+ }
+
+ /* 50ms for operation to begin */
+ msleep(50);
+
+ /* Read back ucode version to besure we loaded correctly and are really up and running */
+ /* Get uCode version */
+ if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) {
+ printk(KERN_WARNING "or51132: load_firmware error a\n");
+ return ret;
+ }
+ if ((ret = or51132_writebytes(state, 0x04, 0x17))) {
+ printk(KERN_WARNING "or51132: load_firmware error b\n");
+ return ret;
+ }
+ if ((ret = or51132_writebytes(state, 0x00, 0x00))) {
+ printk(KERN_WARNING "or51132: load_firmware error c\n");
+ return ret;
+ }
+ for (i=0;i<4;i++) {
+ /* Once upon a time, this command might have had something
+ to do with getting the firmware version, but it's
+ not used anymore:
+ {0x04,0x00,0x30,0x00,i+1} */
+ /* Read 8 bytes, two bytes at a time */
+ if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) {
+ printk(KERN_WARNING
+ "or51132: load_firmware error d - %d\n",i);
+ return ret;
+ }
+ }
+
+ printk(KERN_WARNING
+ "or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n",
+ rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2],
+ rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6],
+ rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f,
+ rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f);
+
+ if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) {
+ printk(KERN_WARNING "or51132: load_firmware error e\n");
+ return ret;
+ }
+ return 0;
+};
+
+static int or51132_init(struct dvb_frontend* fe)
+{
+ return 0;
+}
+
+static int or51132_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ *ber = 0;
+ return 0;
+}
+
+static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+ *ucblocks = 0;
+ return 0;
+}
+
+static int or51132_sleep(struct dvb_frontend* fe)
+{
+ return 0;
+}
+
+static int or51132_setmode(struct dvb_frontend* fe)
+{
+ struct or51132_state* state = fe->demodulator_priv;
+ u8 cmd_buf1[3] = {0x04, 0x01, 0x5f};
+ u8 cmd_buf2[3] = {0x1c, 0x00, 0 };
+
+ dprintk("setmode %d\n",(int)state->current_modulation);
+
+ switch (state->current_modulation) {
+ case VSB_8:
+ /* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */
+ cmd_buf1[2] = 0x50;
+ /* REC MODE inv IF spectrum, Normal */
+ cmd_buf2[1] = 0x03;
+ /* Channel MODE ATSC/VSB8 */
+ cmd_buf2[2] = 0x06;
+ break;
+ /* All QAM modes are:
+ Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high
+ REC MODE Normal Carrier Lock */
+ case QAM_AUTO:
+ /* Channel MODE Auto QAM64/256 */
+ cmd_buf2[2] = 0x4f;
+ break;
+ case QAM_256:
+ /* Channel MODE QAM256 */
+ cmd_buf2[2] = 0x45;
+ break;
+ case QAM_64:
+ /* Channel MODE QAM64 */
+ cmd_buf2[2] = 0x43;
+ break;
+ default:
+ printk(KERN_WARNING
+ "or51132: setmode: Modulation set to unsupported value (%d)\n",
+ state->current_modulation);
+ return -EINVAL;
+ }
+
+ /* Set Receiver 1 register */
+ if (or51132_writebuf(state, cmd_buf1, 3)) {
+ printk(KERN_WARNING "or51132: set_mode error 1\n");
+ return -EREMOTEIO;
+ }
+ dprintk("set #1 to %02x\n", cmd_buf1[2]);
+
+ /* Set operation mode in Receiver 6 register */
+ if (or51132_writebuf(state, cmd_buf2, 3)) {
+ printk(KERN_WARNING "or51132: set_mode error 2\n");
+ return -EREMOTEIO;
+ }
+ dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]);
+
+ return 0;
+}
+
+/* Some modulations use the same firmware. This classifies modulations
+ by the firmware they use. */
+#define MOD_FWCLASS_UNKNOWN 0
+#define MOD_FWCLASS_VSB 1
+#define MOD_FWCLASS_QAM 2
+static int modulation_fw_class(enum fe_modulation modulation)
+{
+ switch(modulation) {
+ case VSB_8:
+ return MOD_FWCLASS_VSB;
+ case QAM_AUTO:
+ case QAM_64:
+ case QAM_256:
+ return MOD_FWCLASS_QAM;
+ default:
+ return MOD_FWCLASS_UNKNOWN;
+ }
+}
+
+static int or51132_set_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ int ret;
+ struct or51132_state* state = fe->demodulator_priv;
+ const struct firmware *fw;
+ const char *fwname;
+ int clock_mode;
+
+ /* Upload new firmware only if we need a different one */
+ if (modulation_fw_class(state->current_modulation) !=
+ modulation_fw_class(p->modulation)) {
+ switch (modulation_fw_class(p->modulation)) {
+ case MOD_FWCLASS_VSB:
+ dprintk("set_parameters VSB MODE\n");
+ fwname = OR51132_VSB_FIRMWARE;
+
+ /* Set non-punctured clock for VSB */
+ clock_mode = 0;
+ break;
+ case MOD_FWCLASS_QAM:
+ dprintk("set_parameters QAM MODE\n");
+ fwname = OR51132_QAM_FIRMWARE;
+
+ /* Set punctured clock for QAM */
+ clock_mode = 1;
+ break;
+ default:
+ printk("or51132: Modulation type(%d) UNSUPPORTED\n",
+ p->modulation);
+ return -1;
+ }
+ printk("or51132: Waiting for firmware upload(%s)...\n",
+ fwname);
+ ret = request_firmware(&fw, fwname, state->i2c->dev.parent);
+ if (ret) {
+ printk(KERN_WARNING "or51132: No firmware uploaded(timeout or file not found?)\n");
+ return ret;
+ }
+ ret = or51132_load_firmware(fe, fw);
+ release_firmware(fw);
+ if (ret) {
+ printk(KERN_WARNING "or51132: Writing firmware to device failed!\n");
+ return ret;
+ }
+ printk("or51132: Firmware upload complete.\n");
+ state->config->set_ts_params(fe, clock_mode);
+ }
+ /* Change only if we are actually changing the modulation */
+ if (state->current_modulation != p->modulation) {
+ state->current_modulation = p->modulation;
+ or51132_setmode(fe);
+ }
+
+ if (fe->ops.tuner_ops.set_params) {
+ fe->ops.tuner_ops.set_params(fe);
+ if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+
+ /* Set to current mode */
+ or51132_setmode(fe);
+
+ /* Update current frequency */
+ state->current_frequency = p->frequency;
+ return 0;
+}
+
+static int or51132_get_parameters(struct dvb_frontend* fe,
+ struct dtv_frontend_properties *p)
+{
+ struct or51132_state* state = fe->demodulator_priv;
+ int status;
+ int retry = 1;
+
+start:
+ /* Receiver Status */
+ if ((status = or51132_readreg(state, 0x00)) < 0) {
+ printk(KERN_WARNING "or51132: get_parameters: error reading receiver status\n");
+ return -EREMOTEIO;
+ }
+ switch(status&0xff) {
+ case 0x06:
+ p->modulation = VSB_8;
+ break;
+ case 0x43:
+ p->modulation = QAM_64;
+ break;
+ case 0x45:
+ p->modulation = QAM_256;
+ break;
+ default:
+ if (retry--)
+ goto start;
+ printk(KERN_WARNING "or51132: unknown status 0x%02x\n",
+ status&0xff);
+ return -EREMOTEIO;
+ }
+
+ /* FIXME: Read frequency from frontend, take AFC into account */
+ p->frequency = state->current_frequency;
+
+ /* FIXME: How to read inversion setting? Receiver 6 register? */
+ p->inversion = INVERSION_AUTO;
+
+ return 0;
+}
+
+static int or51132_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+ struct or51132_state* state = fe->demodulator_priv;
+ int reg;
+
+ /* Receiver Status */
+ if ((reg = or51132_readreg(state, 0x00)) < 0) {
+ printk(KERN_WARNING "or51132: read_status: error reading receiver status: %d\n", reg);
+ *status = 0;
+ return -EREMOTEIO;
+ }
+ dprintk("%s: read_status %04x\n", __func__, reg);
+
+ if (reg & 0x0100) /* Receiver Lock */
+ *status = FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|
+ FE_HAS_SYNC|FE_HAS_LOCK;
+ else
+ *status = 0;
+ return 0;
+}
+
+/* Calculate SNR estimation (scaled by 2^24)
+
+ 8-VSB SNR and QAM equations from Oren datasheets
+
+ For 8-VSB:
+ SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K
+
+ Where K = 0 if NTSC rejection filter is OFF; and
+ K = 3 if NTSC rejection filter is ON
+
+ For QAM64:
+ SNR[dB] = 10 * log10(897152044.8282 / MSE^2 )
+
+ For QAM256:
+ SNR[dB] = 10 * log10(907832426.314266 / MSE^2 )
+
+ We re-write the snr equation as:
+ SNR * 2^24 = 10*(c - 2*intlog10(MSE))
+ Where for QAM256, c = log10(907832426.314266) * 2^24
+ and for 8-VSB and QAM64, c = log10(897152044.8282) * 2^24 */
+
+static u32 calculate_snr(u32 mse, u32 c)
+{
+ if (mse == 0) /* No signal */
+ return 0;
+
+ mse = 2*intlog10(mse);
+ if (mse > c) {
+ /* Negative SNR, which is possible, but realisticly the
+ demod will lose lock before the signal gets this bad. The
+ API only allows for unsigned values, so just return 0 */
+ return 0;
+ }
+ return 10*(c - mse);
+}
+
+static int or51132_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct or51132_state* state = fe->demodulator_priv;
+ int noise, reg;
+ u32 c, usK = 0;
+ int retry = 1;
+
+start:
+ /* SNR after Equalizer */
+ noise = or51132_readreg(state, 0x02);
+ if (noise < 0) {
+ printk(KERN_WARNING "or51132: read_snr: error reading equalizer\n");
+ return -EREMOTEIO;
+ }
+ dprintk("read_snr noise (%d)\n", noise);
+
+ /* Read status, contains modulation type for QAM_AUTO and
+ NTSC filter for VSB */
+ reg = or51132_readreg(state, 0x00);
+ if (reg < 0) {
+ printk(KERN_WARNING "or51132: read_snr: error reading receiver status\n");
+ return -EREMOTEIO;
+ }
+
+ switch (reg&0xff) {
+ case 0x06:
+ if (reg & 0x1000) usK = 3 << 24;
+ fallthrough;
+ case 0x43: /* QAM64 */
+ c = 150204167;
+ break;
+ case 0x45:
+ c = 150290396;
+ break;
+ default:
+ printk(KERN_WARNING "or51132: unknown status 0x%02x\n", reg&0xff);
+ if (retry--) goto start;
+ return -EREMOTEIO;
+ }
+ dprintk("%s: modulation %02x, NTSC rej O%s\n", __func__,
+ reg&0xff, reg&0x1000?"n":"ff");
+
+ /* Calculate SNR using noise, c, and NTSC rejection correction */
+ state->snr = calculate_snr(noise, c) - usK;
+ *snr = (state->snr) >> 16;
+
+ dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise,
+ state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
+
+ return 0;
+}
+
+static int or51132_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+ /* Calculate Strength from SNR up to 35dB */
+ /* Even though the SNR can go higher than 35dB, there is some comfort */
+ /* factor in having a range of strong signals that can show at 100% */
+ struct or51132_state* state = (struct or51132_state*) fe->demodulator_priv;
+ u16 snr;
+ int ret;
+
+ ret = fe->ops.read_snr(fe, &snr);
+ if (ret != 0)
+ return ret;
+ /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
+ /* scale the range 0 - 35*2^24 into 0 - 65535 */
+ if (state->snr >= 8960 * 0x10000)
+ *strength = 0xffff;
+ else
+ *strength = state->snr / 8960;
+
+ return 0;
+}
+
+static int or51132_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
+{
+ fe_tune_settings->min_delay_ms = 500;
+ fe_tune_settings->step_size = 0;
+ fe_tune_settings->max_drift = 0;
+
+ return 0;
+}
+
+static void or51132_release(struct dvb_frontend* fe)
+{
+ struct or51132_state* state = fe->demodulator_priv;
+ kfree(state);
+}
+
+static const struct dvb_frontend_ops or51132_ops;
+
+struct dvb_frontend* or51132_attach(const struct or51132_config* config,
+ struct i2c_adapter* i2c)
+{
+ struct or51132_state* state = NULL;
+
+ /* Allocate memory for the internal state */
+ state = kzalloc(sizeof(struct or51132_state), GFP_KERNEL);
+ if (state == NULL)
+ return NULL;
+
+ /* Setup the state */
+ state->config = config;
+ state->i2c = i2c;
+ state->current_frequency = -1;
+ state->current_modulation = -1;
+
+ /* Create dvb_frontend */
+ memcpy(&state->frontend.ops, &or51132_ops, sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+ return &state->frontend;
+}
+
+static const struct dvb_frontend_ops or51132_ops = {
+ .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
+ .info = {
+ .name = "Oren OR51132 VSB/QAM Frontend",
+ .frequency_min_hz = 44 * MHz,
+ .frequency_max_hz = 958 * MHz,
+ .frequency_stepsize_hz = 166666,
+ .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+ FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+ FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_QAM_AUTO |
+ FE_CAN_8VSB
+ },
+
+ .release = or51132_release,
+
+ .init = or51132_init,
+ .sleep = or51132_sleep,
+
+ .set_frontend = or51132_set_parameters,
+ .get_frontend = or51132_get_parameters,
+ .get_tune_settings = or51132_get_tune_settings,
+
+ .read_status = or51132_read_status,
+ .read_ber = or51132_read_ber,
+ .read_signal_strength = or51132_read_signal_strength,
+ .read_snr = or51132_read_snr,
+ .read_ucblocks = or51132_read_ucblocks,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("OR51132 ATSC [pcHDTV HD-3000] (8VSB & ITU J83 AnnexB FEC QAM64/256) Demodulator Driver");
+MODULE_AUTHOR("Kirk Lapray");
+MODULE_AUTHOR("Trent Piepho");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL_GPL(or51132_attach);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:52:18 +0000