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Commit 6777f017 authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: hil_kbd - switch to use completion instead of semaphore 



Stop abusing semaphore for waiting, use completion instead. Also handle
errors from input_register_device.

Tested-by: default avatarHelge Deller <deller@gmx.de>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 67dbe83a

drivers/input/keyboard/hil_kbd.c

+140 −132
Original line number Diff line number Diff line
@@ -37,7 +37,7 @@ 
#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/semaphore.h>

#include <linux/completion.h>

#include <linux/slab.h>

#include <linux/pci_ids.h>
@@ -81,135 +81,128 @@ struct hil_kbd { 
	char	exd[HIL_KBD_MAX_LENGTH];	/* EXD record */

	char	rnm[HIL_KBD_MAX_LENGTH + 1];	/* RNM record + NULL term. */



	/* Something to sleep around with. */

	struct semaphore sem;

	struct completion cmd_done;

};



/* Process a complete packet after transfer from the HIL */

static void hil_kbd_process_record(struct hil_kbd *kbd)

static bool hil_kbd_is_command_response(hil_packet p)

{

	if ((p & ~HIL_CMDCT_POL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))

		return false;



	if ((p & ~HIL_CMDCT_RPL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))

		return false;



	return true;

}



static void hil_kbd_handle_command_response(struct hil_kbd *kbd)

{

	struct input_dev *dev = kbd->dev;

	hil_packet *data = kbd->data;

	hil_packet p;

	int idx, i, cnt;

	char *buf;

	int i, idx;



	idx = kbd->idx4 / 4;

	p = data[idx - 1];

	p = kbd->data[idx - 1];



	if ((p & ~HIL_CMDCT_POL) ==

	    (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))

		goto report;

	if ((p & ~HIL_CMDCT_RPL) ==

	    (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))

		goto report;



	/* Not a poll response.  See if we are loading config records. */

	switch (p & HIL_PKT_DATA_MASK) {

	case HIL_CMD_IDD:

		for (i = 0; i < idx; i++)

			kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;

		for (; i < HIL_KBD_MAX_LENGTH; i++)

			kbd->idd[i] = 0;

		buf = kbd->idd;

		break;



	case HIL_CMD_RSC:

		for (i = 0; i < idx; i++)

			kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK;

		for (; i < HIL_KBD_MAX_LENGTH; i++)

			kbd->rsc[i] = 0;

		buf = kbd->rsc;

		break;



	case HIL_CMD_EXD:

		for (i = 0; i < idx; i++)

			kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;

		for (; i < HIL_KBD_MAX_LENGTH; i++)

			kbd->exd[i] = 0;

		buf = kbd->exd;

		break;



	case HIL_CMD_RNM:

		for (i = 0; i < idx; i++)

			kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK;

		for (; i < HIL_KBD_MAX_LENGTH + 1; i++)

			kbd->rnm[i] = '\0';

		kbd->rnm[HIL_KBD_MAX_LENGTH] = 0;

		buf = kbd->rnm;

		break;



	default:

		/* These occur when device isn't present */

		if (p == (HIL_ERR_INT | HIL_PKT_CMD))

			break;

		if (p != (HIL_ERR_INT | HIL_PKT_CMD)) {

			/* Anything else we'd like to know about. */

			printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);

		break;

		}

		goto out;

	}



	for (i = 0; i < idx; i++)

		buf[i] = kbd->data[i] & HIL_PKT_DATA_MASK;

	for (; i < HIL_KBD_MAX_LENGTH; i++)

		buf[i] = 0;

 out:

	complete(&kbd->cmd_done);

}



static void hil_kbd_handle_key_events(struct hil_kbd *kbd)

{

	struct input_dev *dev = kbd->dev;

	int idx = kbd->idx4 / 4;

	int i;



 report:

	cnt = 1;

	switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {

	case HIL_POL_CHARTYPE_NONE:

		break;

		return;



	case HIL_POL_CHARTYPE_ASCII:

		while (cnt < idx - 1)

			input_report_key(dev, kbd->data[cnt++] & 0x7f, 1);

		for (i = 1; i < idx - 1; i++)

			input_report_key(dev, kbd->data[i] & 0x7f, 1);

		break;



	case HIL_POL_CHARTYPE_RSVD1:

	case HIL_POL_CHARTYPE_RSVD2:

	case HIL_POL_CHARTYPE_BINARY:

		while (cnt < idx - 1)

			input_report_key(dev, kbd->data[cnt++], 1);

		for (i = 1; i < idx - 1; i++)

			input_report_key(dev, kbd->data[i], 1);

		break;



	case HIL_POL_CHARTYPE_SET1:

		while (cnt < idx - 1) {

			unsigned int key;

			int up;

			key = kbd->data[cnt++];

			up = key & HIL_KBD_SET1_UPBIT;

		for (i = 1; i < idx - 1; i++) {

			unsigned int key = kbd->data[i];

			int up = key & HIL_KBD_SET1_UPBIT;



			key &= (~HIL_KBD_SET1_UPBIT & 0xff);

			key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT];

			if (key != KEY_RESERVED)

			input_report_key(dev, key, !up);

		}

		break;



	case HIL_POL_CHARTYPE_SET2:

		while (cnt < idx - 1) {

			unsigned int key;

			int up;

			key = kbd->data[cnt++];

			up = key & HIL_KBD_SET2_UPBIT;

		for (i = 1; i < idx - 1; i++) {

			unsigned int key = kbd->data[i];

			int up = key & HIL_KBD_SET2_UPBIT;



			key &= (~HIL_KBD_SET1_UPBIT & 0xff);

			key = key >> HIL_KBD_SET2_SHIFT;

			if (key != KEY_RESERVED)

			input_report_key(dev, key, !up);

		}

		break;



	case HIL_POL_CHARTYPE_SET3:

		while (cnt < idx - 1) {

			unsigned int key;

			int up;

			key = kbd->data[cnt++];

			up = key & HIL_KBD_SET3_UPBIT;

		for (i = 1; i < idx - 1; i++) {

			unsigned int key = kbd->data[i];

			int up = key & HIL_KBD_SET3_UPBIT;



			key &= (~HIL_KBD_SET1_UPBIT & 0xff);

			key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT];

			if (key != KEY_RESERVED)

			input_report_key(dev, key, !up);

		}

		break;

	}

 out:

	kbd->idx4 = 0;

	up(&kbd->sem);



	input_sync(dev);

}



static void hil_kbd_process_err(struct hil_kbd *kbd)

{

	printk(KERN_WARNING PREFIX "errored HIL packet\n");

	kbd->idx4 = 0;

	up(&kbd->sem);

	complete(&kbd->cmd_done); /* just in case somebody is waiting */

}



static irqreturn_t hil_kbd_interrupt(struct serio *serio,
@@ -222,10 +215,11 @@ static irqreturn_t hil_kbd_interrupt(struct serio *serio, 
	kbd = serio_get_drvdata(serio);

	BUG_ON(kbd == NULL);



	if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) {

	if (kbd->idx4 >= HIL_KBD_MAX_LENGTH * sizeof(hil_packet)) {

		hil_kbd_process_err(kbd);

		return IRQ_HANDLED;

		goto out;

	}



	idx = kbd->idx4 / 4;

	if (!(kbd->idx4 % 4))

		kbd->data[idx] = 0;
@@ -234,22 +228,25 @@ static irqreturn_t hil_kbd_interrupt(struct serio *serio, 
	kbd->data[idx] = packet;



	/* Records of N 4-byte hil_packets must terminate with a command. */

	if ((++(kbd->idx4)) % 4)

		return IRQ_HANDLED;

	if ((++kbd->idx4 % 4) == 0) {

		if ((packet & 0xffff0000) != HIL_ERR_INT) {

			hil_kbd_process_err(kbd);

		return IRQ_HANDLED;

		} else if (packet & HIL_PKT_CMD) {

			if (hil_kbd_is_command_response(packet))

				hil_kbd_handle_command_response(kbd);

			else

				hil_kbd_handle_key_events(kbd);

			kbd->idx4 = 0;

		}

	}

	if (packet & HIL_PKT_CMD)

		hil_kbd_process_record(kbd);

 out:

	return IRQ_HANDLED;

}



static void hil_kbd_disconnect(struct serio *serio)

{

	struct hil_kbd *kbd;

	struct hil_kbd *kbd = serio_get_drvdata(serio);



	kbd = serio_get_drvdata(serio);

	BUG_ON(kbd == NULL);



	serio_close(serio);
@@ -260,51 +257,63 @@ static void hil_kbd_disconnect(struct serio *serio) 
static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv)

{

	struct hil_kbd *kbd;

	struct input_dev *input_dev;

	uint8_t did, *idd;

	int i;

	int error;



	kbd = kzalloc(sizeof(*kbd), GFP_KERNEL);

	if (!kbd)

		return -ENOMEM;



	kbd->dev = input_allocate_device();

	if (!kbd->dev)

	input_dev = input_allocate_device();

	if (!kbd || !input_dev) {

		error = -ENOMEM;

		goto bail0;

	}



	if (serio_open(serio, drv))

		goto bail1;



	serio_set_drvdata(serio, kbd);

	kbd->serio = serio;

	kbd->dev = input_dev;



	init_MUTEX_LOCKED(&kbd->sem);

	error = serio_open(serio, drv);

	if (error)

		goto bail0;



	serio_set_drvdata(serio, kbd);



	/* Get device info.  MLC driver supplies devid/status/etc. */

	init_completion(&kbd->cmd_done);

	serio_write(serio, 0);

	serio_write(serio, 0);

	serio_write(serio, HIL_PKT_CMD >> 8);

	serio_write(serio, HIL_CMD_IDD);

	down(&kbd->sem);

	error = wait_for_completion_killable(&kbd->cmd_done);

	if (error)

		goto bail1;



	init_completion(&kbd->cmd_done);

	serio_write(serio, 0);

	serio_write(serio, 0);

	serio_write(serio, HIL_PKT_CMD >> 8);

	serio_write(serio, HIL_CMD_RSC);

	down(&kbd->sem);

	error = wait_for_completion_killable(&kbd->cmd_done);

	if (error)

		goto bail1;



	init_completion(&kbd->cmd_done);

	serio_write(serio, 0);

	serio_write(serio, 0);

	serio_write(serio, HIL_PKT_CMD >> 8);

	serio_write(serio, HIL_CMD_RNM);

	down(&kbd->sem);

	error = wait_for_completion_killable(&kbd->cmd_done);

	if (error)

		goto bail1;



	init_completion(&kbd->cmd_done);

	serio_write(serio, 0);

	serio_write(serio, 0);

	serio_write(serio, HIL_PKT_CMD >> 8);

	serio_write(serio, HIL_CMD_EXD);

	down(&kbd->sem);



	up(&kbd->sem);

	error = wait_for_completion_killable(&kbd->cmd_done);

	if (error)

		goto bail1;



	did = kbd->idd[0];

	idd = kbd->idd + 1;
@@ -317,55 +326,54 @@ static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv) 
			did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]);

		break;

	default:

		goto bail2;

		goto bail1;

	}



	if (HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {

		printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n");

		goto bail2;

		goto bail1;

	}



	kbd->dev->evbit[0]	= BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);

	kbd->dev->ledbit[0]	= BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |

	input_dev->evbit[0]	= BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);

	input_dev->ledbit[0]	= BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |

				  BIT_MASK(LED_SCROLLL);

	kbd->dev->keycodemax	= HIL_KEYCODES_SET1_TBLSIZE;

	kbd->dev->keycodesize	= sizeof(hil_kbd_set1[0]);

	kbd->dev->keycode	= hil_kbd_set1;

	kbd->dev->name		= strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;

	kbd->dev->phys		= "hpkbd/input0";	/* XXX */



	kbd->dev->id.bustype	= BUS_HIL;

	kbd->dev->id.vendor	= PCI_VENDOR_ID_HP;

	kbd->dev->id.product	= 0x0001; /* TODO: get from kbd->rsc */

	kbd->dev->id.version	= 0x0100; /* TODO: get from kbd->rsc */

	kbd->dev->dev.parent	= &serio->dev;

	input_dev->keycodemax	= HIL_KEYCODES_SET1_TBLSIZE;

	input_dev->keycodesize	= sizeof(hil_kbd_set1[0]);

	input_dev->keycode	= hil_kbd_set1;

	input_dev->name		= strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;

	input_dev->phys		= "hpkbd/input0";	/* XXX */



	input_dev->id.bustype	= BUS_HIL;

	input_dev->id.vendor	= PCI_VENDOR_ID_HP;

	input_dev->id.product	= 0x0001; /* TODO: get from kbd->rsc */

	input_dev->id.version	= 0x0100; /* TODO: get from kbd->rsc */

	input_dev->dev.parent	= &serio->dev;



	for (i = 0; i < 128; i++) {

		set_bit(hil_kbd_set1[i], kbd->dev->keybit);

		set_bit(hil_kbd_set3[i], kbd->dev->keybit);

		__set_bit(hil_kbd_set1[i], input_dev->keybit);

		__set_bit(hil_kbd_set3[i], input_dev->keybit);

	}

	clear_bit(0, kbd->dev->keybit);



	input_register_device(kbd->dev);

	printk(KERN_INFO "input: %s, ID: %d\n",

		kbd->dev->name, did);

	__clear_bit(KEY_RESERVED, input_dev->keybit);



	serio_write(serio, 0);

	serio_write(serio, 0);

	serio_write(serio, HIL_PKT_CMD >> 8);

	serio_write(serio, HIL_CMD_EK1); /* Enable Keyswitch Autorepeat 1 */

	down(&kbd->sem);

	up(&kbd->sem);

	/* No need to wait for completion */



	error = input_register_device(kbd->dev);

	if (error)

		goto bail1;



	return 0;

 bail2:



 bail1:

	serio_close(serio);

	serio_set_drvdata(serio, NULL);

 bail1:

	input_free_device(kbd->dev);

 bail0:

	input_free_device(input_dev);

	kfree(kbd);

	return -EIO;

	return error;

}



static struct serio_device_id hil_kbd_ids[] = {