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authorDaniele Palmas <dnlplm@gmail.com>2021-01-27 16:34:32 +0100
committerJakub Kicinski <kuba@kernel.org>2021-01-28 18:00:02 -0800
commite594ad980ec26fb7351d02c84abaa77ecdb4e522 (patch)
tree33eb0c6d191ea3716737338bfc9c3b0169044ec9
parentipvlan: remove h from printk format specifier (diff)
net: usb: qmi_wwan: add qmap id sysfs file for qmimux interfaces
Add qmimux interface sysfs file qmap/mux_id to show qmap id set during the interface creation, in order to provide a method for userspace to associate QMI control channels to network interfaces. Signed-off-by: Daniele Palmas <dnlplm@gmail.com> Acked-by: Bjørn Mork <bjorn@mork.no> Acked-by: Aleksander Morgado <aleksander@aleksander.es> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat
-rw-r--r--drivers/net/usb/qmi_wwan.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index b96a3dc775a4..29568ea8a9f2 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -218,6 +218,28 @@ skip:
return 1;
}
+static ssize_t mux_id_show(struct device *d, struct device_attribute *attr, char *buf)
+{
+ struct net_device *dev = to_net_dev(d);
+ struct qmimux_priv *priv;
+
+ priv = netdev_priv(dev);
+
+ return sysfs_emit(buf, "0x%02x\n", priv->mux_id);
+}
+
+static DEVICE_ATTR_RO(mux_id);
+
+static struct attribute *qmi_wwan_sysfs_qmimux_attrs[] = {
+ &dev_attr_mux_id.attr,
+ NULL,
+};
+
+static struct attribute_group qmi_wwan_sysfs_qmimux_attr_group = {
+ .name = "qmap",
+ .attrs = qmi_wwan_sysfs_qmimux_attrs,
+};
+
static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
{
struct net_device *new_dev;
@@ -240,6 +262,8 @@ static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
goto out_free_newdev;
}
+ new_dev->sysfs_groups[0] = &qmi_wwan_sysfs_qmimux_attr_group;
+
err = register_netdevice(new_dev);
if (err < 0)
goto out_free_newdev;
Copyright © 1996 – 2026 Jason A. Donenfeld. All Rights Reverse Engineered.
id='n186' href='#n186'>186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 
// SPDX-License-Identifier: GPL-2.0-only
/*
 * itg3200_core.c -- support InvenSense ITG3200
 *                   Digital 3-Axis Gyroscope driver
 *
 * Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
 * Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
 * Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
 *
 * TODO:
 * - Support digital low pass filter
 * - Support power management
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/delay.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/events.h>
#include <linux/iio/buffer.h>

#include <linux/iio/gyro/itg3200.h>


int itg3200_write_reg_8(struct iio_dev *indio_dev,
		u8 reg_address, u8 val)
{
	struct itg3200 *st = iio_priv(indio_dev);

	return i2c_smbus_write_byte_data(st->i2c, 0x80 | reg_address, val);
}

int itg3200_read_reg_8(struct iio_dev *indio_dev,
		u8 reg_address, u8 *val)
{
	struct itg3200 *st = iio_priv(indio_dev);
	int ret;

	ret = i2c_smbus_read_byte_data(st->i2c, reg_address);
	if (ret < 0)
		return ret;
	*val = ret;
	return 0;
}

static int itg3200_read_reg_s16(struct iio_dev *indio_dev, u8 lower_reg_address,
		int *val)
{
	struct itg3200 *st = iio_priv(indio_dev);
	struct i2c_client *client = st->i2c;
	int ret;
	s16 out;

	struct i2c_msg msg[2] = {
		{
			.addr = client->addr,
			.flags = client->flags,
			.len = 1,
			.buf = (char *)&lower_reg_address,
		},
		{
			.addr = client->addr,
			.flags = client->flags | I2C_M_RD,
			.len = 2,
			.buf = (char *)&out,
		},
	};

	lower_reg_address |= 0x80;
	ret = i2c_transfer(client->adapter, msg, 2);
	be16_to_cpus(&out);
	*val = out;

	return (ret == 2) ? 0 : ret;
}

static int itg3200_read_raw(struct iio_dev *indio_dev,
		const struct iio_chan_spec *chan,
		int *val, int *val2, long info)
{
	int ret = 0;
	u8 reg;
	u8 regval;

	switch (info) {
	case IIO_CHAN_INFO_RAW:
		reg = (u8)chan->address;
		ret = itg3200_read_reg_s16(indio_dev, reg, val);
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SCALE:
		*val = 0;
		if (chan->type == IIO_TEMP)
			*val2 = 1000000000/280;
		else
			*val2 = 1214142; /* (1 / 14,375) * (PI / 180) */
		return IIO_VAL_INT_PLUS_NANO;
	case IIO_CHAN_INFO_OFFSET:
		/* Only the temperature channel has an offset */
		*val = 23000;
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &regval);
		if (ret)
			return ret;

		*val = (regval & ITG3200_DLPF_CFG_MASK) ? 1000 : 8000;

		ret = itg3200_read_reg_8(indio_dev,
					 ITG3200_REG_SAMPLE_RATE_DIV,
					 &regval);
		if (ret)
			return ret;

		*val /= regval + 1;
		return IIO_VAL_INT;

	default:
		return -EINVAL;
	}
}

static int itg3200_write_raw(struct iio_dev *indio_dev,
			     struct iio_chan_spec const *chan,
			     int val,
			     int val2,
			     long mask)
{
	struct itg3200 *st = iio_priv(indio_dev);
	int ret;
	u8 t;

	switch (mask) {
	case IIO_CHAN_INFO_SAMP_FREQ:
		if (val == 0 || val2 != 0)
			return -EINVAL;

		mutex_lock(&st->lock);

		ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &t);
		if (ret) {
			mutex_unlock(&st->lock);
			return ret;
		}
		t = ((t & ITG3200_DLPF_CFG_MASK) ? 1000u : 8000u) / val - 1;

		ret = itg3200_write_reg_8(indio_dev,
					  ITG3200_REG_SAMPLE_RATE_DIV,
					  t);

		mutex_unlock(&st->lock);
		return ret;

	default:
		return -EINVAL;
	}
}

/*
 * Reset device and internal registers to the power-up-default settings
 * Use the gyro clock as reference, as suggested by the datasheet
 */
static int itg3200_reset(struct iio_dev *indio_dev)
{
	struct itg3200 *st = iio_priv(indio_dev);
	int ret;

	dev_dbg(&st->i2c->dev, "reset device");

	ret = itg3200_write_reg_8(indio_dev,
			ITG3200_REG_POWER_MANAGEMENT,
			ITG3200_RESET);
	if (ret) {
		dev_err(&st->i2c->dev, "error resetting device");
		goto error_ret;
	}

	/* Wait for PLL (1ms according to datasheet) */
	udelay(1500);

	ret = itg3200_write_reg_8(indio_dev,
			ITG3200_REG_IRQ_CONFIG,
			ITG3200_IRQ_ACTIVE_HIGH |
			ITG3200_IRQ_PUSH_PULL |
			ITG3200_IRQ_LATCH_50US_PULSE |
			ITG3200_IRQ_LATCH_CLEAR_ANY);

	if (ret)
		dev_err(&st->i2c->dev, "error init device");

error_ret:
	return ret;
}

/* itg3200_enable_full_scale() - Disables the digital low pass filter */
static int itg3200_enable_full_scale(struct iio_dev *indio_dev)
{
	u8 val;
	int ret;

	ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &val);
	if (ret)
		goto err_ret;

	val |= ITG3200_DLPF_FS_SEL_2000;
	return itg3200_write_reg_8(indio_dev, ITG3200_REG_DLPF, val);

err_ret:
	return ret;
}

static int itg3200_initial_setup(struct iio_dev *indio_dev)
{
	struct itg3200 *st = iio_priv(indio_dev);
	int ret;
	u8 val;

	ret = itg3200_reset(indio_dev);
	if (ret)
		goto err_ret;

	ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_ADDRESS, &val);
	if (ret)
		goto err_ret;

	if (((val >> 1) & 0x3f) != 0x34) {
		dev_err(&st->i2c->dev, "invalid reg value 0x%02x", val);
		ret = -ENXIO;
		goto err_ret;
	}

	ret = itg3200_enable_full_scale(indio_dev);
err_ret:
	return ret;
}

static const struct iio_mount_matrix *
itg3200_get_mount_matrix(const struct iio_dev *indio_dev,
			  const struct iio_chan_spec *chan)
{
	struct itg3200 *data = iio_priv(indio_dev);

	return &data->orientation;
}

static const struct iio_chan_spec_ext_info itg3200_ext_info[] = {
	IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, itg3200_get_mount_matrix),
	{ }
};

#define ITG3200_ST						\
	{ .sign = 's', .realbits = 16, .storagebits = 16, .endianness = IIO_BE }

#define ITG3200_GYRO_CHAN(_mod) { \
	.type = IIO_ANGL_VEL, \
	.modified = 1, \
	.channel2 = IIO_MOD_ ## _mod, \
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
	.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
	.address = ITG3200_REG_GYRO_ ## _mod ## OUT_H, \
	.scan_index = ITG3200_SCAN_GYRO_ ## _mod, \
	.scan_type = ITG3200_ST, \
	.ext_info = itg3200_ext_info, \
}

static const struct iio_chan_spec itg3200_channels[] = {
	{
		.type = IIO_TEMP,
		.channel2 = IIO_NO_MOD,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
		BIT(IIO_CHAN_INFO_SCALE),
		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
		.address = ITG3200_REG_TEMP_OUT_H,
		.scan_index = ITG3200_SCAN_TEMP,
		.scan_type = ITG3200_ST,
	},
	ITG3200_GYRO_CHAN(X),
	ITG3200_GYRO_CHAN(Y),
	ITG3200_GYRO_CHAN(Z),
	IIO_CHAN_SOFT_TIMESTAMP(ITG3200_SCAN_ELEMENTS),
};

static const struct iio_info itg3200_info = {
	.read_raw = &itg3200_read_raw,
	.write_raw = &itg3200_write_raw,
};

static const unsigned long itg3200_available_scan_masks[] = { 0xffffffff, 0x0 };

static int itg3200_probe(struct i2c_client *client)
{
	int ret;
	struct itg3200 *st;
	struct iio_dev *indio_dev;

	dev_dbg(&client->dev, "probe I2C dev with IRQ %i", client->irq);

	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
	if (!indio_dev)
		return -ENOMEM;

	st = iio_priv(indio_dev);

	ret = iio_read_mount_matrix(&client->dev, &st->orientation);
	if (ret)
		return ret;

	i2c_set_clientdata(client, indio_dev);
	st->i2c = client;

	indio_dev->name = client->dev.driver->name;
	indio_dev->channels = itg3200_channels;
	indio_dev->num_channels = ARRAY_SIZE(itg3200_channels);
	indio_dev->available_scan_masks = itg3200_available_scan_masks;
	indio_dev->info = &itg3200_info;
	indio_dev->modes = INDIO_DIRECT_MODE;

	ret = itg3200_buffer_configure(indio_dev);
	if (ret)
		return ret;

	if (client->irq) {
		ret = itg3200_probe_trigger(indio_dev);
		if (ret)
			goto error_unconfigure_buffer;
	}

	ret = itg3200_initial_setup(indio_dev);
	if (ret)
		goto error_remove_trigger;

	mutex_init(&st->lock);

	ret = iio_device_register(indio_dev);
	if (ret)
		goto error_remove_trigger;

	return 0;

error_remove_trigger:
	if (client->irq)
		itg3200_remove_trigger(indio_dev);
error_unconfigure_buffer:
	itg3200_buffer_unconfigure(indio_dev);
	return ret;
}

static void itg3200_remove(struct i2c_client *client)
{
	struct iio_dev *indio_dev = i2c_get_clientdata(client);

	iio_device_unregister(indio_dev);

	if (client->irq)
		itg3200_remove_trigger(indio_dev);

	itg3200_buffer_unconfigure(indio_dev);
}

static int itg3200_suspend(struct device *dev)
{
	struct iio_dev *indio_dev = dev_get_drvdata(dev);
	struct itg3200 *st = iio_priv(indio_dev);

	dev_dbg(&st->i2c->dev, "suspend device");

	return itg3200_write_reg_8(indio_dev, ITG3200_REG_POWER_MANAGEMENT,
				   ITG3200_SLEEP);
}

static int itg3200_resume(struct device *dev)
{
	struct iio_dev *indio_dev = dev_get_drvdata(dev);

	return itg3200_initial_setup(indio_dev);
}

static DEFINE_SIMPLE_DEV_PM_OPS(itg3200_pm_ops, itg3200_suspend,
				itg3200_resume);

static const struct i2c_device_id itg3200_id[] = {
	{ "itg3200" },
	{ }
};
MODULE_DEVICE_TABLE(i2c, itg3200_id);

static const struct of_device_id itg3200_of_match[] = {
	{ .compatible = "invensense,itg3200" },
	{ }
};
MODULE_DEVICE_TABLE(of, itg3200_of_match);

static struct i2c_driver itg3200_driver = {
	.driver = {
		.name	= "itg3200",
		.of_match_table = itg3200_of_match,
		.pm	= pm_sleep_ptr(&itg3200_pm_ops),
	},
	.id_table	= itg3200_id,
	.probe		= itg3200_probe,
	.remove		= itg3200_remove,
};

module_i2c_driver(itg3200_driver);

MODULE_AUTHOR("Christian Strobel <christian.strobel@iis.fraunhofer.de>");
MODULE_DESCRIPTION("ITG3200 Gyroscope I2C driver");
MODULE_LICENSE("GPL v2");