1 // SPDX-License-Identifier: GPL-2.0-or-later
10  * This driver needs external firmware. Please use the command
12  * download/extract it, and then copy it to /usr/lib/hotplug/firmware
13  * or /lib/firmware (depending on configuration of firmware hotplug).
15 #define SP8870_DEFAULT_FIRMWARE "dvb-fe-sp8870.fw"
20 #include <linux/firmware.h>
38 	u8 initialised:1;  member
47 /* firmware size for sp8870 */
50 /* starting point for firmware in file 'Sc_main.mc' */
56 	struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 4 };  in sp8870_writereg()
59 	if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {  in sp8870_writereg()
61 		return -EREMOTEIO;  in sp8870_writereg()
72 …struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 2 …  in sp8870_readreg()
73 			   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 2 } };  in sp8870_readreg()
75 	ret = i2c_transfer (state->i2c, msg, 2);  in sp8870_readreg()
79 		return -1;  in sp8870_readreg()
85 static int sp8870_firmware_upload (struct sp8870_state* state, const struct firmware *fw)  in sp8870_firmware_upload()
88 	const char *fw_buf = fw->data;  in sp8870_firmware_upload()
96 	if (fw->size < SP8870_FIRMWARE_SIZE + SP8870_FIRMWARE_OFFSET)  in sp8870_firmware_upload()
97 		return -EINVAL;  in sp8870_firmware_upload()
108 	// do firmware upload  in sp8870_firmware_upload()
111 …P8870_FIRMWARE_SIZE + SP8870_FIRMWARE_OFFSET - 252) ? 252 : SP8870_FIRMWARE_SIZE + SP8870_FIRMWARE…  in sp8870_firmware_upload()
116 		msg.addr = state->config->demod_address;  in sp8870_firmware_upload()
120 		if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {  in sp8870_firmware_upload()
121 			printk("%s: firmware upload failed!\n", __func__);  in sp8870_firmware_upload()
164 	switch (p->modulation) {  in configure_reg0xc05()
177 		return -EINVAL;  in configure_reg0xc05()
180 	switch (p->hierarchy) {  in configure_reg0xc05()
196 		return -EINVAL;  in configure_reg0xc05()
199 	switch (p->code_rate_HP) {  in configure_reg0xc05()
218 		return -EINVAL;  in configure_reg0xc05()
237 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;  in sp8870_set_frontend_parameters()
238 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_set_frontend_parameters()
249 	if (fe->ops.tuner_ops.set_params) {  in sp8870_set_frontend_parameters()
250 		fe->ops.tuner_ops.set_params(fe);  in sp8870_set_frontend_parameters()
251 		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);  in sp8870_set_frontend_parameters()
267 	if (p->bandwidth_hz == 6000000)  in sp8870_set_frontend_parameters()
269 	else if (p->bandwidth_hz == 7000000)  in sp8870_set_frontend_parameters()
275 	if (p->transmission_mode == TRANSMISSION_MODE_2K)  in sp8870_set_frontend_parameters()
295 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_init()
296 	const struct firmware *fw = NULL;  in sp8870_init()
299 	if (state->initialised) return 0;  in sp8870_init()
300 	state->initialised = 1;  in sp8870_init()
305 	/* request the firmware, this will block until someone uploads it */  in sp8870_init()
306 	printk("sp8870: waiting for firmware upload (%s)...\n", SP8870_DEFAULT_FIRMWARE);  in sp8870_init()
307 	if (state->config->request_firmware(fe, &fw, SP8870_DEFAULT_FIRMWARE)) {  in sp8870_init()
308 		printk("sp8870: no firmware upload (timeout or file not found?)\n");  in sp8870_init()
309 		return -EIO;  in sp8870_init()
313 		printk("sp8870: writing firmware to device failed\n");  in sp8870_init()
315 		return -EIO;  in sp8870_init()
318 	printk("sp8870: firmware upload complete\n");  in sp8870_init()
345 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_read_status()
353 		return -EIO;  in sp8870_read_status()
357 		return -EIO;  in sp8870_read_status()
371 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_read_ber()
379 		return -EIO;  in sp8870_read_ber()
385 		return -EIO;  in sp8870_read_ber()
398 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_read_signal_strength()
406 		return -EIO;  in sp8870_read_signal_strength()
412 		return -EIO;  in sp8870_read_signal_strength()
417 		*signal = 0xFFFF - tmp;  in sp8870_read_signal_strength()
424 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_read_uncorrected_blocks()
431 		return -EIO;  in sp8870_read_uncorrected_blocks()
453 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;  in sp8870_set_frontend()
454 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_set_frontend()
457 	    The firmware of the sp8870 sometimes locks up after setting frontend parameters.  in sp8870_set_frontend()
468 	dprintk("%s: frequency = %i\n", __func__, p->frequency);  in sp8870_set_frontend()
491 		printk("%s: firmware crash!!!!!!\n", __func__);  in sp8870_set_frontend()
492 		return -EIO;  in sp8870_set_frontend()
498 				printk("%s: firmware lockup!!!\n", __func__);  in sp8870_set_frontend()
499 				printk("%s: recovered after %i trial(s))\n",  __func__, trials - 1);  in sp8870_set_frontend()
512 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_sleep()
520 	fesettings->min_delay_ms = 350;  in sp8870_get_tune_settings()
521 	fesettings->step_size = 0;  in sp8870_get_tune_settings()
522 	fesettings->max_drift = 0;  in sp8870_get_tune_settings()
528 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_i2c_gate_ctrl()
539 	struct sp8870_state* state = fe->demodulator_priv;  in sp8870_release()
555 	state->config = config;  in sp8870_attach()
556 	state->i2c = i2c;  in sp8870_attach()
557 	state->initialised = 0;  in sp8870_attach()
563 	memcpy(&state->frontend.ops, &sp8870_ops, sizeof(struct dvb_frontend_ops));  in sp8870_attach()
564 	state->frontend.demodulator_priv = state;  in sp8870_attach()
565 	return &state->frontend;  in sp8870_attach()
575 		.name			= "Spase SP8870 DVB-T",
605 MODULE_DESCRIPTION("Spase SP8870 DVB-T Demodulator driver");