summaryrefslogtreecommitdiffstats
path: root/net/vmw_vsock/vmci_transport.c
AgeCommit message (Expand)Author
2018-12-18VSOCK: Send reset control packet when socket is partially boundJorgen Hansen
2018-08-07vsock: split dwork to avoid reinitializationsCong Wang
2017-11-28VSOCK: Don't set sk_state to TCP_CLOSE before testing itJorgen Hansen
2017-11-26VSOCK: Don't call vsock_stream_has_data in atomic contextJorgen Hansen
2017-10-05VSOCK: use TCP state constants for sk_stateStefan Hajnoczi
2017-09-19vsock: vmci: Remove unneeded linux/miscdevice.h includeCorentin Labbe
2017-03-30VSOCK: remove unnecessary ternary operator on return valueColin Ian King
2016-08-02VSOCK: defer sock removal to transportsStefan Hajnoczi
2016-05-03VSOCK: constify vsock_transport structureJulia Lawall
2016-04-19VSOCK: Only check error on skb_recv_datagram when skb is NULLJorgen Hansen
2016-04-06VSOCK: Detach QP check should filter out non matching QPs.Jorgen Hansen
2015-11-04VSOCK: call sk->sk_data_ready() on accept()Stefan Hajnoczi
2015-11-01VSOCK: define VSOCK_SS_LISTEN once onlyStefan Hajnoczi
2015-10-22VSOCK: Fix lockdep issue.Jorgen Hansen
2015-10-22VSOCK: sock_put wasn't safe to call in interrupt contextJorgen Hansen
2015-05-11net: Pass kern from net_proto_family.create to sk_allocEric W. Biederman
2015-03-02net: Remove iocb argument from sendmsg and recvmsgYing Xue
2015-02-04vmci: propagate msghdr all way down to __qp_memcpy_to_queue()Al Viro
2014-12-09put iov_iter into msghdrAl Viro
2014-12-09vmci: propagate msghdr all way down to __qp_memcpy_from_queue()Al Viro
2014-11-24vmci_transport: switch ->enqeue_dgram, ->enqueue_stream and ->dequeue_stream ...Al Viro
2014-11-05net: Add and use skb_copy_datagram_msg() helper.David S. Miller
2014-01-18net: add build-time checks for msg->msg_name sizeSteffen Hurrle
2013-11-20net: rework recvmsg handler msg_name and msg_namelen logicHannes Frederic Sowa
2013-07-27VSOCK: Move af_vsock.h and vsock_addr.h to include/netAsias He
2013-06-23VSOCK: Remove unnecessary labelAsias He
2013-06-23VSOCK: Return VMCI_ERROR_NO_MEM when fails to allocate skbAsias He
2013-04-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2013-04-07VSOCK: vmci - fix possible info leak in vmci_transport_dgram_dequeue()Mathias Krause
2013-04-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2013-04-02VSOCK: Handle changes to the VMCI context ID.Reilly Grant
2013-03-15VSOCK: Support VM sockets connected to the hypervisor.Reilly Grant
2013-02-18VSOCK: get rid of EXPORT_SYMTABDmitry Torokhov
2013-02-10VSOCK: Introduce VM SocketsAndy King
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 08:04:46 +0000
#n279'>279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 
/*
 * Copyright 2011 bct electronic GmbH
 * Copyright 2013 Qtechnology/AS
 *
 * Author: Peter Meerwald <p.meerwald@bct-electronic.com>
 * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
 *
 * Based on leds-pca955x.c
 *
 * This file is subject to the terms and conditions of version 2 of
 * the GNU General Public License.  See the file COPYING in the main
 * directory of this archive for more details.
 *
 * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
 * LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.)
 *
 * Note that hardware blinking violates the leds infrastructure driver
 * interface since the hardware only supports blinking all LEDs with the
 * same delay_on/delay_off rates.  That is, only the LEDs that are set to
 * blink will actually blink but all LEDs that are set to blink will blink
 * in identical fashion.  The delay_on/delay_off values of the last LED
 * that is set to blink will be used for all of the blinking LEDs.
 * Hardware blinking is disabled by default but can be enabled by setting
 * the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK'
 * or by adding the 'nxp,hw-blink' property to the DTS.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/platform_data/leds-pca963x.h>

/* LED select registers determine the source that drives LED outputs */
#define PCA963X_LED_OFF		0x0	/* LED driver off */
#define PCA963X_LED_ON		0x1	/* LED driver on */
#define PCA963X_LED_PWM		0x2	/* Controlled through PWM */
#define PCA963X_LED_GRP_PWM	0x3	/* Controlled through PWM/GRPPWM */

#define PCA963X_MODE2_DMBLNK	0x20	/* Enable blinking */

#define PCA963X_MODE1		0x00
#define PCA963X_MODE2		0x01
#define PCA963X_PWM_BASE	0x02

enum pca963x_type {
	pca9633,
	pca9634,
	pca9635,
};

struct pca963x_chipdef {
	u8			grppwm;
	u8			grpfreq;
	u8			ledout_base;
	int			n_leds;
	unsigned int		scaling;
};

static struct pca963x_chipdef pca963x_chipdefs[] = {
	[pca9633] = {
		.grppwm		= 0x6,
		.grpfreq	= 0x7,
		.ledout_base	= 0x8,
		.n_leds		= 4,
	},
	[pca9634] = {
		.grppwm		= 0xa,
		.grpfreq	= 0xb,
		.ledout_base	= 0xc,
		.n_leds		= 8,
	},
	[pca9635] = {
		.grppwm		= 0x12,
		.grpfreq	= 0x13,
		.ledout_base	= 0x14,
		.n_leds		= 16,
	},
};

/* Total blink period in milliseconds */
#define PCA963X_BLINK_PERIOD_MIN	42
#define PCA963X_BLINK_PERIOD_MAX	10667

static const struct i2c_device_id pca963x_id[] = {
	{ "pca9632", pca9633 },
	{ "pca9633", pca9633 },
	{ "pca9634", pca9634 },
	{ "pca9635", pca9635 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, pca963x_id);

struct pca963x_led;

struct pca963x {
	struct pca963x_chipdef *chipdef;
	struct mutex mutex;
	struct i2c_client *client;
	struct pca963x_led *leds;
	unsigned long leds_on;
};

struct pca963x_led {
	struct pca963x *chip;
	struct led_classdev led_cdev;
	int led_num; /* 0 .. 15 potentially */
	char name[32];
	u8 gdc;
	u8 gfrq;
};

static int pca963x_brightness(struct pca963x_led *pca963x,
			       enum led_brightness brightness)
{
	u8 ledout_addr = pca963x->chip->chipdef->ledout_base
		+ (pca963x->led_num / 4);
	u8 ledout;
	int shift = 2 * (pca963x->led_num % 4);
	u8 mask = 0x3 << shift;
	int ret;

	ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
	switch (brightness) {
	case LED_FULL:
		ret = i2c_smbus_write_byte_data(pca963x->chip->client,
			ledout_addr,
			(ledout & ~mask) | (PCA963X_LED_ON << shift));
		break;
	case LED_OFF:
		ret = i2c_smbus_write_byte_data(pca963x->chip->client,
			ledout_addr, ledout & ~mask);
		break;
	default:
		ret = i2c_smbus_write_byte_data(pca963x->chip->client,
			PCA963X_PWM_BASE + pca963x->led_num,
			brightness);
		if (ret < 0)
			return ret;
		ret = i2c_smbus_write_byte_data(pca963x->chip->client,
			ledout_addr,
			(ledout & ~mask) | (PCA963X_LED_PWM << shift));
		break;
	}

	return ret;
}

static void pca963x_blink(struct pca963x_led *pca963x)
{
	u8 ledout_addr = pca963x->chip->chipdef->ledout_base +
		(pca963x->led_num / 4);
	u8 ledout;
	u8 mode2 = i2c_smbus_read_byte_data(pca963x->chip->client,
							PCA963X_MODE2);
	int shift = 2 * (pca963x->led_num % 4);
	u8 mask = 0x3 << shift;

	i2c_smbus_write_byte_data(pca963x->chip->client,
			pca963x->chip->chipdef->grppwm,	pca963x->gdc);

	i2c_smbus_write_byte_data(pca963x->chip->client,
			pca963x->chip->chipdef->grpfreq, pca963x->gfrq);

	if (!(mode2 & PCA963X_MODE2_DMBLNK))
		i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_MODE2,
			mode2 | PCA963X_MODE2_DMBLNK);

	mutex_lock(&pca963x->chip->mutex);
	ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
	if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift))
		i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
			(ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift));
	mutex_unlock(&pca963x->chip->mutex);
}

static int pca963x_power_state(struct pca963x_led *pca963x)
{
	unsigned long *leds_on = &pca963x->chip->leds_on;
	unsigned long cached_leds = pca963x->chip->leds_on;

	if (pca963x->led_cdev.brightness)
		set_bit(pca963x->led_num, leds_on);
	else
		clear_bit(pca963x->led_num, leds_on);

	if (!(*leds_on) != !cached_leds)
		return i2c_smbus_write_byte_data(pca963x->chip->client,
			PCA963X_MODE1, *leds_on ? 0 : BIT(4));

	return 0;
}

static int pca963x_led_set(struct led_classdev *led_cdev,
	enum led_brightness value)
{
	struct pca963x_led *pca963x;
	int ret;

	pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);

	mutex_lock(&pca963x->chip->mutex);

	ret = pca963x_brightness(pca963x, value);
	if (ret < 0)
		goto unlock;
	ret = pca963x_power_state(pca963x);

unlock:
	mutex_unlock(&pca963x->chip->mutex);
	return ret;
}

static unsigned int pca963x_period_scale(struct pca963x_led *pca963x,
	unsigned int val)
{
	unsigned int scaling = pca963x->chip->chipdef->scaling;

	return scaling ? DIV_ROUND_CLOSEST(val * scaling, 1000) : val;
}

static int pca963x_blink_set(struct led_classdev *led_cdev,
		unsigned long *delay_on, unsigned long *delay_off)
{
	struct pca963x_led *pca963x;
	unsigned long time_on, time_off, period;
	u8 gdc, gfrq;

	pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);

	time_on = *delay_on;
	time_off = *delay_off;

	/* If both zero, pick reasonable defaults of 500ms each */
	if (!time_on && !time_off) {
		time_on = 500;
		time_off = 500;
	}

	period = pca963x_period_scale(pca963x, time_on + time_off);

	/* If period not supported by hardware, default to someting sane. */
	if ((period < PCA963X_BLINK_PERIOD_MIN) ||
	    (period > PCA963X_BLINK_PERIOD_MAX)) {
		time_on = 500;
		time_off =