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path: root/drivers/media/dvb/frontends/or51211.c
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Diffstat (limited to 'drivers/media/dvb/frontends/or51211.c')
-rw-r--r--drivers/media/dvb/frontends/or51211.c581
1 files changed, 581 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/or51211.c b/drivers/media/dvb/frontends/or51211.c
new file mode 100644
index 00000000..c625b57b
--- /dev/null
+++ b/drivers/media/dvb/frontends/or51211.c
@@ -0,0 +1,581 @@
+/*
+ * Support for OR51211 (pcHDTV HD-2000) - VSB
+ *
+ * Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
+ *
+ * Based on code from Jack Kelliher (kelliher@xmission.com)
+ * Copyright (C) 2002 & pcHDTV, inc.
+ *
+ * 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.
+ *
+*/
+
+/*
+ * This driver needs external firmware. Please use the command
+ * "<kerneldir>/Documentation/dvb/get_dvb_firmware or51211" to
+ * download/extract it, and then copy it to /usr/lib/hotplug/firmware
+ * or /lib/firmware (depending on configuration of firmware hotplug).
+ */
+#define OR51211_DEFAULT_FIRMWARE "dvb-fe-or51211.fw"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+
+#include "dvb_math.h"
+#include "dvb_frontend.h"
+#include "or51211.h"
+
+static int debug;
+#define dprintk(args...) \
+ do { \
+ if (debug) printk(KERN_DEBUG "or51211: " args); \
+ } while (0)
+
+static u8 run_buf[] = {0x7f,0x01};
+static u8 cmd_buf[] = {0x04,0x01,0x50,0x80,0x06}; // ATSC
+
+struct or51211_state {
+
+ struct i2c_adapter* i2c;
+
+ /* Configuration settings */
+ const struct or51211_config* config;
+
+ struct dvb_frontend frontend;
+ struct bt878* bt;
+
+ /* Demodulator private data */
+ u8 initialized:1;
+ u32 snr; /* Result of last SNR claculation */
+
+ /* Tuner private data */
+ u32 current_frequency;
+};
+
+static int i2c_writebytes (struct or51211_state* state, u8 reg, const u8 *buf,
+ int len)
+{
+ int err;
+ struct i2c_msg msg;
+ msg.addr = reg;
+ msg.flags = 0;
+ msg.len = len;
+ msg.buf = (u8 *)buf;
+
+ if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
+ printk(KERN_WARNING "or51211: i2c_writebytes error "
+ "(addr %02x, err == %i)\n", reg, err);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static int i2c_readbytes(struct or51211_state *state, u8 reg, u8 *buf, int len)
+{
+ int err;
+ struct i2c_msg msg;
+ msg.addr = reg;
+ msg.flags = I2C_M_RD;
+ msg.len = len;
+ msg.buf = buf;
+
+ if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
+ printk(KERN_WARNING "or51211: i2c_readbytes error "
+ "(addr %02x, err == %i)\n", reg, err);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static int or51211_load_firmware (struct dvb_frontend* fe,
+ const struct firmware *fw)
+{
+ struct or51211_state* state = fe->demodulator_priv;
+ u8 tudata[585];
+ int i;
+
+ dprintk("Firmware is %zd bytes\n",fw->size);
+
+ /* Get eprom data */
+ tudata[0] = 17;
+ if (i2c_writebytes(state,0x50,tudata,1)) {
+ printk(KERN_WARNING "or51211:load_firmware error eprom addr\n");
+ return -1;
+ }
+ if (i2c_readbytes(state,0x50,&tudata[145],192)) {
+ printk(KERN_WARNING "or51211: load_firmware error eprom\n");
+ return -1;
+ }
+
+ /* Create firmware buffer */
+ for (i = 0; i < 145; i++)
+ tudata[i] = fw->data[i];
+
+ for (i = 0; i < 248; i++)
+ tudata[i+337] = fw->data[145+i];
+
+ state->config->reset(fe);
+
+ if (i2c_writebytes(state,state->config->demod_address,tudata,585)) {
+ printk(KERN_WARNING "or51211: load_firmware error 1\n");
+ return -1;
+ }
+ msleep(1);
+
+ if (i2c_writebytes(state,state->config->demod_address,
+ &fw->data[393],8125)) {
+ printk(KERN_WARNING "or51211: load_firmware error 2\n");
+ return -1;
+ }
+ msleep(1);
+
+ if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
+ printk(KERN_WARNING "or51211: load_firmware error 3\n");
+ return -1;
+ }
+
+ /* Wait at least 5 msec */
+ msleep(10);
+ if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
+ printk(KERN_WARNING "or51211: load_firmware error 4\n");
+ return -1;
+ }
+ msleep(10);
+
+ printk("or51211: Done.\n");
+ return 0;
+};
+
+static int or51211_setmode(struct dvb_frontend* fe, int mode)
+{
+ struct or51211_state* state = fe->demodulator_priv;
+ u8 rec_buf[14];
+
+ state->config->setmode(fe, mode);
+
+ if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
+ printk(KERN_WARNING "or51211: setmode error 1\n");
+ return -1;
+ }
+
+ /* Wait at least 5 msec */
+ msleep(10);
+ if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
+ printk(KERN_WARNING "or51211: setmode error 2\n");
+ return -1;
+ }
+
+ msleep(10);
+
+ /* Set operation mode in Receiver 1 register;
+ * type 1:
+ * data 0x50h Automatic sets receiver channel conditions
+ * Automatic NTSC rejection filter
+ * Enable MPEG serial data output
+ * MPEG2tr
+ * High tuner phase noise
+ * normal +/-150kHz Carrier acquisition range
+ */
+ if (i2c_writebytes(state,state->config->demod_address,cmd_buf,3)) {
+ printk(KERN_WARNING "or51211: setmode error 3\n");
+ return -1;
+ }
+
+ rec_buf[0] = 0x04;
+ rec_buf[1] = 0x00;
+ rec_buf[2] = 0x03;
+ rec_buf[3] = 0x00;
+ msleep(20);
+ if (i2c_writebytes(state,state->config->demod_address,rec_buf,3)) {
+ printk(KERN_WARNING "or51211: setmode error 5\n");
+ }
+ msleep(3);
+ if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) {
+ printk(KERN_WARNING "or51211: setmode error 6");
+ return -1;
+ }
+ dprintk("setmode rec status %02x %02x\n",rec_buf[10],rec_buf[11]);
+
+ return 0;
+}
+
+static int or51211_set_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct or51211_state* state = fe->demodulator_priv;
+
+ /* Change only if we are actually changing the channel */
+ if (state->current_frequency != p->frequency) {
+ 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 ATSC mode */
+ or51211_setmode(fe,0);
+
+ /* Update current frequency */
+ state->current_frequency = p->frequency;
+ }
+ return 0;
+}
+
+static int or51211_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+ struct or51211_state* state = fe->demodulator_priv;
+ unsigned char rec_buf[2];
+ unsigned char snd_buf[] = {0x04,0x00,0x03,0x00};
+ *status = 0;
+
+ /* Receiver Status */
+ if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
+ printk(KERN_WARNING "or51132: read_status write error\n");
+ return -1;
+ }
+ msleep(3);
+ if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
+ printk(KERN_WARNING "or51132: read_status read error\n");
+ return -1;
+ }
+ dprintk("read_status %x %x\n",rec_buf[0],rec_buf[1]);
+
+ if (rec_buf[0] & 0x01) { /* Receiver Lock */
+ *status |= FE_HAS_SIGNAL;
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_VITERBI;
+ *status |= FE_HAS_SYNC;
+ *status |= FE_HAS_LOCK;
+ }
+ return 0;
+}
+
+/* Calculate SNR estimation (scaled by 2^24)
+
+ 8-VSB SNR equation from Oren datasheets
+
+ For 8-VSB:
+ SNR[dB] = 10 * log10(219037.9454 / MSE^2 )
+
+ We re-write the snr equation as:
+ SNR * 2^24 = 10*(c - 2*intlog10(MSE))
+ Where for 8-VSB, c = log10(219037.9454) * 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 or51211_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct or51211_state* state = fe->demodulator_priv;
+ u8 rec_buf[2];
+ u8 snd_buf[3];
+
+ /* SNR after Equalizer */
+ snd_buf[0] = 0x04;
+ snd_buf[1] = 0x00;
+ snd_buf[2] = 0x04;
+
+ if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
+ printk(KERN_WARNING "%s: error writing snr reg\n",
+ __func__);
+ return -1;
+ }
+ if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
+ printk(KERN_WARNING "%s: read_status read error\n",
+ __func__);
+ return -1;
+ }
+
+ state->snr = calculate_snr(rec_buf[0], 89599047);
+ *snr = (state->snr) >> 16;
+
+ dprintk("%s: noise = 0x%02x, snr = %d.%02d dB\n", __func__, rec_buf[0],
+ state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
+
+ return 0;
+}
+
+static int or51211_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 or51211_state* state = (struct or51211_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 or51211_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ *ber = -ENOSYS;
+ return 0;
+}
+
+static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+ *ucblocks = -ENOSYS;
+ return 0;
+}
+
+static int or51211_sleep(struct dvb_frontend* fe)
+{
+ return 0;
+}
+
+static int or51211_init(struct dvb_frontend* fe)
+{
+ struct or51211_state* state = fe->demodulator_priv;
+ const struct or51211_config* config = state->config;
+ const struct firmware* fw;
+ unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
+ unsigned char rec_buf[14];
+ int ret,i;
+
+ if (!state->initialized) {
+ /* Request the firmware, this will block until it uploads */
+ printk(KERN_INFO "or51211: Waiting for firmware upload "
+ "(%s)...\n", OR51211_DEFAULT_FIRMWARE);
+ ret = config->request_firmware(fe, &fw,
+ OR51211_DEFAULT_FIRMWARE);
+ printk(KERN_INFO "or51211:Got Hotplug firmware\n");
+ if (ret) {
+ printk(KERN_WARNING "or51211: No firmware uploaded "
+ "(timeout or file not found?)\n");
+ return ret;
+ }
+
+ ret = or51211_load_firmware(fe, fw);
+ release_firmware(fw);
+ if (ret) {
+ printk(KERN_WARNING "or51211: Writing firmware to "
+ "device failed!\n");
+ return ret;
+ }
+ printk(KERN_INFO "or51211: Firmware upload complete.\n");
+
+ /* Set operation mode in Receiver 1 register;
+ * type 1:
+ * data 0x50h Automatic sets receiver channel conditions
+ * Automatic NTSC rejection filter
+ * Enable MPEG serial data output
+ * MPEG2tr
+ * High tuner phase noise
+ * normal +/-150kHz Carrier acquisition range
+ */
+ if (i2c_writebytes(state,state->config->demod_address,
+ cmd_buf,3)) {
+ printk(KERN_WARNING "or51211: Load DVR Error 5\n");
+ return -1;
+ }
+
+ /* Read back ucode version to besure we loaded correctly */
+ /* and are really up and running */
+ rec_buf[0] = 0x04;
+ rec_buf[1] = 0x00;
+ rec_buf[2] = 0x03;
+ rec_buf[3] = 0x00;
+ msleep(30);
+ if (i2c_writebytes(state,state->config->demod_address,
+ rec_buf,3)) {
+ printk(KERN_WARNING "or51211: Load DVR Error A\n");
+ return -1;
+ }
+ msleep(3);
+ if (i2c_readbytes(state,state->config->demod_address,
+ &rec_buf[10],2)) {
+ printk(KERN_WARNING "or51211: Load DVR Error B\n");
+ return -1;
+ }
+
+ rec_buf[0] = 0x04;
+ rec_buf[1] = 0x00;
+ rec_buf[2] = 0x01;
+ rec_buf[3] = 0x00;
+ msleep(20);
+ if (i2c_writebytes(state,state->config->demod_address,
+ rec_buf,3)) {
+ printk(KERN_WARNING "or51211: Load DVR Error C\n");
+ return -1;
+ }
+ msleep(3);
+ if (i2c_readbytes(state,state->config->demod_address,
+ &rec_buf[12],2)) {
+ printk(KERN_WARNING "or51211: Load DVR Error D\n");
+ return -1;
+ }
+
+ for (i = 0; i < 8; i++)
+ rec_buf[i]=0xed;
+
+ for (i = 0; i < 5; i++) {
+ msleep(30);
+ get_ver_buf[4] = i+1;
+ if (i2c_writebytes(state,state->config->demod_address,
+ get_ver_buf,5)) {
+ printk(KERN_WARNING "or51211:Load DVR Error 6"
+ " - %d\n",i);
+ return -1;
+ }
+ msleep(3);
+
+ if (i2c_readbytes(state,state->config->demod_address,
+ &rec_buf[i*2],2)) {
+ printk(KERN_WARNING "or51211:Load DVR Error 7"
+ " - %d\n",i);
+ return -1;
+ }
+ /* If we didn't receive the right index, try again */
+ if ((int)rec_buf[i*2+1]!=i+1){
+ i--;
+ }
+ }
+ dprintk("read_fwbits %x %x %x %x %x %x %x %x %x %x\n",
+ rec_buf[0], rec_buf[1], rec_buf[2], rec_buf[3],
+ rec_buf[4], rec_buf[5], rec_buf[6], rec_buf[7],
+ rec_buf[8], rec_buf[9]);
+
+ printk(KERN_INFO "or51211: ver TU%02x%02x%02x VSB mode %02x"
+ " Status %02x\n",
+ rec_buf[2], rec_buf[4],rec_buf[6],
+ rec_buf[12],rec_buf[10]);
+
+ rec_buf[0] = 0x04;
+ rec_buf[1] = 0x00;
+ rec_buf[2] = 0x03;
+ rec_buf[3] = 0x00;
+ msleep(20);
+ if (i2c_writebytes(state,state->config->demod_address,
+ rec_buf,3)) {
+ printk(KERN_WARNING "or51211: Load DVR Error 8\n");
+ return -1;
+ }
+ msleep(20);
+ if (i2c_readbytes(state,state->config->demod_address,
+ &rec_buf[8],2)) {
+ printk(KERN_WARNING "or51211: Load DVR Error 9\n");
+ return -1;
+ }
+ state->initialized = 1;
+ }
+
+ return 0;
+}
+
+static int or51211_get_tune_settings(struct dvb_frontend* fe,
+ struct dvb_frontend_tune_settings* fesettings)
+{
+ fesettings->min_delay_ms = 500;
+ fesettings->step_size = 0;
+ fesettings->max_drift = 0;
+ return 0;
+}
+
+static void or51211_release(struct dvb_frontend* fe)
+{
+ struct or51211_state* state = fe->demodulator_priv;
+ state->config->sleep(fe);
+ kfree(state);
+}
+
+static struct dvb_frontend_ops or51211_ops;
+
+struct dvb_frontend* or51211_attach(const struct or51211_config* config,
+ struct i2c_adapter* i2c)
+{
+ struct or51211_state* state = NULL;
+
+ /* Allocate memory for the internal state */
+ state = kzalloc(sizeof(struct or51211_state), GFP_KERNEL);
+ if (state == NULL)
+ return NULL;
+
+ /* Setup the state */
+ state->config = config;
+ state->i2c = i2c;
+ state->initialized = 0;
+ state->current_frequency = 0;
+
+ /* Create dvb_frontend */
+ memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+ return &state->frontend;
+}
+
+static struct dvb_frontend_ops or51211_ops = {
+ .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
+ .info = {
+ .name = "Oren OR51211 VSB Frontend",
+ .frequency_min = 44000000,
+ .frequency_max = 958000000,
+ .frequency_stepsize = 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_8VSB
+ },
+
+ .release = or51211_release,
+
+ .init = or51211_init,
+ .sleep = or51211_sleep,
+
+ .set_frontend = or51211_set_parameters,
+ .get_tune_settings = or51211_get_tune_settings,
+
+ .read_status = or51211_read_status,
+ .read_ber = or51211_read_ber,
+ .read_signal_strength = or51211_read_signal_strength,
+ .read_snr = or51211_read_snr,
+ .read_ucblocks = or51211_read_ucblocks,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver");
+MODULE_AUTHOR("Kirk Lapray");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(or51211_attach);
+
generated by cgit (git 2.34.1) at 2024-12-22 10:56:18 +0000