drivers/media/dvb/dvb-usb/sc100.c - kernel/mindspeed - Git at Google

 /* DVB USB framework compliant Linux driver for the
  * Google DVB-S SC100 tuner.
  *
  * Copyright (C) 2015 Ke Dong (kedong@google.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, version 2.
  *
  * see Documentation/dvb/README.dvb-usb for more information
  */
 #include "sc100.h"
 #include "dvbsky_m88rs6000.h"
 #include "mach/comcerto-2000.h"

 #define SC100_READ_MSG 0
 #define SC100_WRITE_MSG 1
 #define SC100_MAC_ADDR_INDEX 1

 #define	err_str "did not find the firmware file. (%s) " \
 		"Please see linux/Documentation/dvb/ for more details " \
 		"on firmware-problems."

 /* debug */
 static int dvb_usb_sc100_debug;
 module_param_named(debug, dvb_usb_sc100_debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info)." DVB_USB_DEBUG_STATUS);

 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

 /* Control register for LNP settings
  * B7: I2C Control
  *     1 - enabled, 0 - disabled
  * B6: Reserved
  * B5: Tone Gate
  *     1 - on, 0 - off
  * B4: Tone Mode
  *     1 - internal, 0 - external
  * B3: LNP output voltage
  *     1 - enabled, 0 - disabled
  * B2-1: Output voltage selection
  *     0 - 13V, 4 - 18V
  */
 #define LNB_I2C_ADDRESS (0x60)
 #define LNB_CONTROL_REGISTER_1 (0x00)
 #define LNB_CONTROL_REGISTER_1_I2C_CONTROL_MASK (0x80)
 #define LNB_CONTROL_REGISTER_1_I2C_CONTROL_SHIFT (0x07)
 #define LNB_CONTROL_REGISTER_1_I2C_CONTROL_ENABLED (0x01)
 #define LNB_CONTROL_REGISTER_1_I2C_CONTROL_DISABLED (0x00)
 #define LNB_CONTROL_REGISTER_1_TONE_GATE_MASK (0x20)
 #define LNB_CONTROL_REGISTER_1_TONE_GATE_SHIFT (0x05)
 #define LNB_CONTROL_REGISTER_1_TONE_GATE_ON (0x01)
 #define LNB_CONTROL_REGISTER_1_TONE_GATE_OFF (0x00)
 #define LNB_CONTROL_REGISTER_1_TONE_MODE_MASK (0x10)
 #define LNB_CONTROL_REGISTER_1_TONE_MODE_SHIFT (0x4)
 #define LNB_CONTROL_REGISTER_1_TONE_MODE_INTERNAL (0x01)
 #define LNB_CONTROL_REGISTER_1_TONE_MODE_EXTERNAL (0x00)
 #define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_MASK (0x08)
 #define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_SHIFT (0x03)
 #define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_ON (0x01)
 #define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_OFF 0x00
 #define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_MASK 0x07
 #define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_SHIFT 0x00
 #define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_13V 0x00
 #define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_18V 0x04
 #define LNB_FIELD_SET(data, field, value) \
 { \
 	data &= ~(LNB_CONTROL_REGISTER_1_ ## field ## _MASK); \
 	data |= LNB_CONTROL_REGISTER_1_ ## field ## _ ## value \
 	<< (LNB_CONTROL_REGISTER_1_ ## field ## _ ## SHIFT); \
 }

 struct i2c_adapter *sc100_i2c_adap;
 struct usb_device *sc100_udev;

 static int sc100_read_mac_address(struct dvb_usb_device *d, u8 mac[6])
 {
 	return comcerto_mac_addr_get(mac, SC100_MAC_ADDR_INDEX);
 };

 static int sc100_writereg(u8 reg, u8 data)
 {
 	u8 buf[] = { reg, data };
 	struct i2c_msg msg = { .addr = LNB_I2C_ADDRESS,
 		.flags = 0, .buf = buf, .len = 2 };
 	int ret;

 	deb_info("%s: [W] R:0x%02x, V:0x%02x", __func__, reg, data);

 	ret = i2c_transfer(sc100_i2c_adap, &msg, 1);
 	if (ret != 1) {
 		err("%s: [W] R:0x%02x, V:0x%02x, E:%d", __func__, reg, data, ret);
 		return -EREMOTEIO;
 	}
 	return 0;
 }

 static u8 sc100_readreg(u8 reg)
 {
 	int ret;
 	u8 b0[] = { reg };
 	u8 b1[] = { 0 };

 	struct i2c_msg msg[] = {
 		{ .addr = LNB_I2C_ADDRESS, .flags = 0, .buf = b0, .len = 1 },
 		{ .addr = LNB_I2C_ADDRESS, .flags = I2C_M_RD, .buf = b1, .len = 1 }
 	};
 	ret = i2c_transfer(sc100_i2c_adap, msg, 2);

 	if (ret != 2) {
 		err("%s: [R] R:0x%x, E:%d", __func__, reg, ret);
 		return ret;
 	}
 	deb_info("%s: [R] R:0x%02x, V:0x%02x", __func__, reg, b1[0]);

 	return b1[0];
 }

 static int sc100_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 {
 	u8 lnb_reg = sc100_readreg(LNB_CONTROL_REGISTER_1);
 	switch (tone) {
 	case SEC_TONE_ON:
 		info("%s: LNB TONE=ON\n", __func__);
 		LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
 		LNB_FIELD_SET(lnb_reg, TONE_GATE, ON);
 		LNB_FIELD_SET(lnb_reg, TONE_MODE, INTERNAL);
 		break;
 	case SEC_TONE_OFF:
 		info("%s: LNB TONE=OFF\n", __func__);
 		LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
 		LNB_FIELD_SET(lnb_reg, TONE_GATE, OFF);
 		break;
 	default:
 		return -EINVAL;
 	}
 	return sc100_writereg(LNB_CONTROL_REGISTER_1, lnb_reg);
 }

 static int sc100_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
 {
 	u8 lnb_reg = sc100_readreg(LNB_CONTROL_REGISTER_1);
 	switch (voltage) {
 	case SEC_VOLTAGE_18:
 		info("%s: LNB VOLTAGE=18V\n", __func__);
 		LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
 		LNB_FIELD_SET(lnb_reg, LNB_OUTPUT_VOLTAGE, ON);
 		LNB_FIELD_SET(lnb_reg, LNB_VOLTAGE_SELECTION, 18V);
 		break;
 	case SEC_VOLTAGE_13:
 		info("%s: LNB VOLTAGE=13V\n", __func__);
 		LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
 		LNB_FIELD_SET(lnb_reg, LNB_OUTPUT_VOLTAGE, ON);
 		LNB_FIELD_SET(lnb_reg, LNB_VOLTAGE_SELECTION, 13V);
 		break;
 	default:
 		info("%s: LNB VOLTAGE=OFF\n", __func__);
 		LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
 		LNB_FIELD_SET(lnb_reg, LNB_OUTPUT_VOLTAGE, OFF);
 		break;
 	}
 	return sc100_writereg(LNB_CONTROL_REGISTER_1, lnb_reg);
 }

 static int sc100_set_ts_params(struct dvb_frontend* fe, int is_punctured)
 {
 	return usb_control_msg(sc100_udev, usb_sndctrlpipe(sc100_udev,0),
 			0xa4, USB_TYPE_VENDOR, 0, 0, 0, 0, 5000);
 }

 static struct dvbsky_m88rs6000_config sc100_config = {
 	.demod_address = 0x69,
 	.ci_mode = 2,
 	.pin_ctrl = 0x80,
 	.ts_mode = 0,
 	.tuner_readstops = 1,
 	.set_ts_params = sc100_set_ts_params,
 };

 static struct dvb_usb_device_properties sc100_properties;

 static int sc100_frontend_attach(struct dvb_usb_adapter *d)
 {
 	/* Initializes i2c adapter when the frontend is attached. */
 	sc100_i2c_adap = i2c_get_adapter(0);
 	d->fe_adap[0].fe = dvb_attach(dvbsky_m88rs6000_attach, &sc100_config,
 				sc100_i2c_adap);
 	if (d->fe_adap[0].fe != NULL) {
 		d->fe_adap[0].fe->ops.set_tone = sc100_set_tone;
 		d->fe_adap[0].fe->ops.set_voltage = sc100_set_voltage;
 		info("Attached SC100!\n");
 		return 0;
 	}
 	return -EIO;
 }

 static struct usb_device_id sc100_table[] = {
 	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_SC100_COLD)},
 	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_SC100_WARM)},
 	{ }
 };
 MODULE_DEVICE_TABLE(usb, sc100_table);

 static struct dvb_usb_device_properties sc100_properties = {
 	.usb_ctrl = CYPRESS_FX2,
 	.firmware = "dvb-usb-sc100.fw",

 	/* parameter for the MPEG2-data transfer */
 	.num_adapters = 1,
 	.read_mac_address = sc100_read_mac_address,
 	.adapter = {
 		{
 		.num_frontends = 1,
 		.fe = {{
 			.frontend_attach = sc100_frontend_attach,
 			.stream = {
 				.type = USB_BULK,
 				.count = 8,
 				.endpoint = 0x82,
 				.u = {
 					.bulk = {
 						.buffersize = 4096,
 					}
 				}
 			},
 		}},
 		}
 	},
 	.num_device_descs = 1,
 	.devices = {
 		{ .name = "Google DVB-S SC100 USB2.0",
 		  .cold_ids = { &sc100_table[0], NULL },
 		  .warm_ids = { &sc100_table[1], NULL },
 		},
 		{NULL},
 	}
 };

 static int sc100_probe(struct usb_interface *intf,
 		const struct usb_device_id *id)
 {
 	sc100_udev = interface_to_usbdev(intf);
 	if (0 == dvb_usb_device_init(intf, &sc100_properties,
 			THIS_MODULE, NULL, adapter_nr))
 		return 0;
 	return -ENODEV;
 }

 static struct usb_driver sc100_driver = {
 	.name = "sc100",
 	.probe = sc100_probe,
 	.disconnect = dvb_usb_device_exit,
 	.id_table = sc100_table,
 };

 static int __init sc100_module_init(void)
 {
 	int ret = usb_register(&sc100_driver);
 	if (ret)
 		err("usb_register failed. Error number %d", ret);

 	return ret;
 }

 static void __exit sc100_module_exit(void)
 {
 	usb_deregister(&sc100_driver);
 }

 module_init(sc100_module_init);
 module_exit(sc100_module_exit);

 MODULE_AUTHOR("Ke Dong (c) kedong@google.com");
 MODULE_DESCRIPTION("Driver for Google SC100 device");
 MODULE_VERSION("0.1");
 MODULE_LICENSE("GPL");
	/* DVB USB framework compliant Linux driver for the
	* Google DVB-S SC100 tuner.
	*
	* Copyright (C) 2015 Ke Dong (kedong@google.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, version 2.
	*
	* see Documentation/dvb/README.dvb-usb for more information
	*/
	#include "sc100.h"
	#include "dvbsky_m88rs6000.h"
	#include "mach/comcerto-2000.h"

	#define SC100_READ_MSG 0
	#define SC100_WRITE_MSG 1
	#define SC100_MAC_ADDR_INDEX 1

	#define err_str "did not find the firmware file. (%s) " \
	"Please see linux/Documentation/dvb/ for more details " \
	"on firmware-problems."

	/* debug */
	static int dvb_usb_sc100_debug;
	module_param_named(debug, dvb_usb_sc100_debug, int, 0644);
	MODULE_PARM_DESC(debug, "set debugging level (1=info)." DVB_USB_DEBUG_STATUS);

	DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

	/* Control register for LNP settings
	* B7: I2C Control
	* 1 - enabled, 0 - disabled
	* B6: Reserved
	* B5: Tone Gate
	* 1 - on, 0 - off
	* B4: Tone Mode
	* 1 - internal, 0 - external
	* B3: LNP output voltage
	* 1 - enabled, 0 - disabled
	* B2-1: Output voltage selection
	* 0 - 13V, 4 - 18V
	*/
	#define LNB_I2C_ADDRESS (0x60)
	#define LNB_CONTROL_REGISTER_1 (0x00)
	#define LNB_CONTROL_REGISTER_1_I2C_CONTROL_MASK (0x80)
	#define LNB_CONTROL_REGISTER_1_I2C_CONTROL_SHIFT (0x07)
	#define LNB_CONTROL_REGISTER_1_I2C_CONTROL_ENABLED (0x01)
	#define LNB_CONTROL_REGISTER_1_I2C_CONTROL_DISABLED (0x00)
	#define LNB_CONTROL_REGISTER_1_TONE_GATE_MASK (0x20)
	#define LNB_CONTROL_REGISTER_1_TONE_GATE_SHIFT (0x05)
	#define LNB_CONTROL_REGISTER_1_TONE_GATE_ON (0x01)
	#define LNB_CONTROL_REGISTER_1_TONE_GATE_OFF (0x00)
	#define LNB_CONTROL_REGISTER_1_TONE_MODE_MASK (0x10)
	#define LNB_CONTROL_REGISTER_1_TONE_MODE_SHIFT (0x4)
	#define LNB_CONTROL_REGISTER_1_TONE_MODE_INTERNAL (0x01)
	#define LNB_CONTROL_REGISTER_1_TONE_MODE_EXTERNAL (0x00)
	#define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_MASK (0x08)
	#define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_SHIFT (0x03)
	#define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_ON (0x01)
	#define LNB_CONTROL_REGISTER_1_LNB_OUTPUT_VOLTAGE_OFF 0x00
	#define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_MASK 0x07
	#define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_SHIFT 0x00
	#define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_13V 0x00
	#define LNB_CONTROL_REGISTER_1_LNB_VOLTAGE_SELECTION_18V 0x04
	#define LNB_FIELD_SET(data, field, value) \
	{ \
	data &= ~(LNB_CONTROL_REGISTER_1_ ## field ## _MASK); \
	data \|= LNB_CONTROL_REGISTER_1_ ## field ## _ ## value \
	<< (LNB_CONTROL_REGISTER_1_ ## field ## _ ## SHIFT); \
	}

	struct i2c_adapter *sc100_i2c_adap;
	struct usb_device *sc100_udev;

	static int sc100_read_mac_address(struct dvb_usb_device *d, u8 mac[6])
	{
	return comcerto_mac_addr_get(mac, SC100_MAC_ADDR_INDEX);
	};

	static int sc100_writereg(u8 reg, u8 data)
	{
	u8 buf[] = { reg, data };
	struct i2c_msg msg = { .addr = LNB_I2C_ADDRESS,
	.flags = 0, .buf = buf, .len = 2 };
	int ret;

	deb_info("%s: [W] R:0x%02x, V:0x%02x", __func__, reg, data);

	ret = i2c_transfer(sc100_i2c_adap, &msg, 1);
	if (ret != 1) {
	err("%s: [W] R:0x%02x, V:0x%02x, E:%d", __func__, reg, data, ret);
	return -EREMOTEIO;
	}
	return 0;
	}

	static u8 sc100_readreg(u8 reg)
	{
	int ret;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };

	struct i2c_msg msg[] = {
	{ .addr = LNB_I2C_ADDRESS, .flags = 0, .buf = b0, .len = 1 },
	{ .addr = LNB_I2C_ADDRESS, .flags = I2C_M_RD, .buf = b1, .len = 1 }
	};
	ret = i2c_transfer(sc100_i2c_adap, msg, 2);

	if (ret != 2) {
	err("%s: [R] R:0x%x, E:%d", __func__, reg, ret);
	return ret;
	}
	deb_info("%s: [R] R:0x%02x, V:0x%02x", __func__, reg, b1[0]);

	return b1[0];
	}

	static int sc100_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
	{
	u8 lnb_reg = sc100_readreg(LNB_CONTROL_REGISTER_1);
	switch (tone) {
	case SEC_TONE_ON:
	info("%s: LNB TONE=ON\n", __func__);
	LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
	LNB_FIELD_SET(lnb_reg, TONE_GATE, ON);
	LNB_FIELD_SET(lnb_reg, TONE_MODE, INTERNAL);
	break;
	case SEC_TONE_OFF:
	info("%s: LNB TONE=OFF\n", __func__);
	LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
	LNB_FIELD_SET(lnb_reg, TONE_GATE, OFF);
	break;
	default:
	return -EINVAL;
	}
	return sc100_writereg(LNB_CONTROL_REGISTER_1, lnb_reg);
	}

	static int sc100_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
	{
	u8 lnb_reg = sc100_readreg(LNB_CONTROL_REGISTER_1);
	switch (voltage) {
	case SEC_VOLTAGE_18:
	info("%s: LNB VOLTAGE=18V\n", __func__);
	LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
	LNB_FIELD_SET(lnb_reg, LNB_OUTPUT_VOLTAGE, ON);
	LNB_FIELD_SET(lnb_reg, LNB_VOLTAGE_SELECTION, 18V);
	break;
	case SEC_VOLTAGE_13:
	info("%s: LNB VOLTAGE=13V\n", __func__);
	LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
	LNB_FIELD_SET(lnb_reg, LNB_OUTPUT_VOLTAGE, ON);
	LNB_FIELD_SET(lnb_reg, LNB_VOLTAGE_SELECTION, 13V);
	break;
	default:
	info("%s: LNB VOLTAGE=OFF\n", __func__);
	LNB_FIELD_SET(lnb_reg, I2C_CONTROL, ENABLED);
	LNB_FIELD_SET(lnb_reg, LNB_OUTPUT_VOLTAGE, OFF);
	break;
	}
	return sc100_writereg(LNB_CONTROL_REGISTER_1, lnb_reg);
	}

	static int sc100_set_ts_params(struct dvb_frontend* fe, int is_punctured)
	{
	return usb_control_msg(sc100_udev, usb_sndctrlpipe(sc100_udev,0),
	0xa4, USB_TYPE_VENDOR, 0, 0, 0, 0, 5000);
	}

	static struct dvbsky_m88rs6000_config sc100_config = {
	.demod_address = 0x69,
	.ci_mode = 2,
	.pin_ctrl = 0x80,
	.ts_mode = 0,
	.tuner_readstops = 1,
	.set_ts_params = sc100_set_ts_params,
	};

	static struct dvb_usb_device_properties sc100_properties;

	static int sc100_frontend_attach(struct dvb_usb_adapter *d)
	{
	/* Initializes i2c adapter when the frontend is attached. */
	sc100_i2c_adap = i2c_get_adapter(0);
	d->fe_adap[0].fe = dvb_attach(dvbsky_m88rs6000_attach, &sc100_config,
	sc100_i2c_adap);
	if (d->fe_adap[0].fe != NULL) {
	d->fe_adap[0].fe->ops.set_tone = sc100_set_tone;
	d->fe_adap[0].fe->ops.set_voltage = sc100_set_voltage;
	info("Attached SC100!\n");
	return 0;
	}
	return -EIO;
	}

	static struct usb_device_id sc100_table[] = {
	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_SC100_COLD)},
	{USB_DEVICE(USB_VID_CYPRESS, USB_PID_SC100_WARM)},
	{ }
	};
	MODULE_DEVICE_TABLE(usb, sc100_table);

	static struct dvb_usb_device_properties sc100_properties = {
	.usb_ctrl = CYPRESS_FX2,
	.firmware = "dvb-usb-sc100.fw",

	/* parameter for the MPEG2-data transfer */
	.num_adapters = 1,
	.read_mac_address = sc100_read_mac_address,
	.adapter = {
	{
	.num_frontends = 1,
	.fe = {{
	.frontend_attach = sc100_frontend_attach,
	.stream = {
	.type = USB_BULK,
	.count = 8,
	.endpoint = 0x82,
	.u = {
	.bulk = {
	.buffersize = 4096,
	}
	}
	},
	}},
	}
	},
	.num_device_descs = 1,
	.devices = {
	{ .name = "Google DVB-S SC100 USB2.0",
	.cold_ids = { &sc100_table[0], NULL },
	.warm_ids = { &sc100_table[1], NULL },
	},
	{NULL},
	}
	};

	static int sc100_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	sc100_udev = interface_to_usbdev(intf);
	if (0 == dvb_usb_device_init(intf, &sc100_properties,
	THIS_MODULE, NULL, adapter_nr))
	return 0;
	return -ENODEV;
	}

	static struct usb_driver sc100_driver = {
	.name = "sc100",
	.probe = sc100_probe,
	.disconnect = dvb_usb_device_exit,
	.id_table = sc100_table,
	};

	static int __init sc100_module_init(void)
	{
	int ret = usb_register(&sc100_driver);
	if (ret)
	err("usb_register failed. Error number %d", ret);

	return ret;
	}

	static void __exit sc100_module_exit(void)
	{
	usb_deregister(&sc100_driver);
	}

	module_init(sc100_module_init);
	module_exit(sc100_module_exit);

	MODULE_AUTHOR("Ke Dong (c) kedong@google.com");
	MODULE_DESCRIPTION("Driver for Google SC100 device");
	MODULE_VERSION("0.1");
	MODULE_LICENSE("GPL");