19 #include <linux/olpc-ec.h>
43 	/* Pending EC commands */
50 	 * EC event mask to be applied during suspend (defining wakeup
56 	 * Running an EC command while suspending means we don't always finish
57 	 * the command before the machine suspends.  This means that the EC
59 	 * of time (while the OS is asleep) the EC times out and restarts its
62 	 * the EC... and everyone's uphappy.
80 	struct olpc_ec_priv *ec = container_of(w, struct olpc_ec_priv, worker);  in olpc_ec_worker()  local
85 	spin_lock_irqsave(&ec->cmd_q_lock, flags);  in olpc_ec_worker()
86 	if (!list_empty(&ec->cmd_q)) {  in olpc_ec_worker()
87 		desc = list_first_entry(&ec->cmd_q, struct ec_cmd_desc, node);  in olpc_ec_worker()
90 	spin_unlock_irqrestore(&ec->cmd_q_lock, flags);  in olpc_ec_worker()
96 	/* Protect the EC hw with a mutex; only run one cmd at a time */  in olpc_ec_worker()
97 	mutex_lock(&ec->cmd_lock);  in olpc_ec_worker()
100 	mutex_unlock(&ec->cmd_lock);  in olpc_ec_worker()
106 	schedule_work(&ec->worker);  in olpc_ec_worker()
114 		struct olpc_ec_priv *ec)  in queue_ec_descriptor()  argument
120 	spin_lock_irqsave(&ec->cmd_q_lock, flags);  in queue_ec_descriptor()
121 	list_add_tail(&desc->node, &ec->cmd_q);  in queue_ec_descriptor()
122 	spin_unlock_irqrestore(&ec->cmd_q_lock, flags);  in queue_ec_descriptor()
124 	schedule_work(&ec->worker);  in queue_ec_descriptor()
129 	struct olpc_ec_priv *ec = ec_priv;  in olpc_ec_cmd()  local
139 	if (!ec)  in olpc_ec_cmd()
143 	if (WARN_ON(ec->suspended))  in olpc_ec_cmd()
156 	queue_ec_descriptor(&desc, ec);  in olpc_ec_cmd()
158 	/* Timeouts must be handled in the platform-specific EC hook */  in olpc_ec_cmd()
168 	struct olpc_ec_priv *ec = ec_priv;  in olpc_ec_wakeup_set()  local
170 	if (WARN_ON(!ec))  in olpc_ec_wakeup_set()
173 	ec->ec_wakeup_mask |= value;  in olpc_ec_wakeup_set()
179 	struct olpc_ec_priv *ec = ec_priv;  in olpc_ec_wakeup_clear()  local
181 	if (WARN_ON(!ec))  in olpc_ec_wakeup_clear()
184 	ec->ec_wakeup_mask &= ~value;  in olpc_ec_wakeup_clear()
190 	struct olpc_ec_priv *ec = ec_priv;  in olpc_ec_mask_write()  local
192 	if (WARN_ON(!ec))  in olpc_ec_mask_write()
195 	/* EC version 0x5f adds support for wide SCI mask */  in olpc_ec_mask_write()
196 	if (ec->version >= 0x5f) {  in olpc_ec_mask_write()
209  * Returns true if the compile and runtime configurations allow for EC events
223 	struct olpc_ec_priv *ec = ec_priv;  in olpc_ec_sci_query()  local
226 	if (WARN_ON(!ec))  in olpc_ec_sci_query()
229 	/* EC version 0x5f adds support for wide SCI mask */  in olpc_ec_sci_query()
230 	if (ec->version >= 0x5f) {  in olpc_ec_sci_query()
252  * arbitrary EC commands from userspace.
282 		pr_debug("olpc-ec: bad ec cmd:  cmd:response-count [arg1 [arg2 ...]]\n");  in ec_dbgfs_cmd_write()
292 	pr_debug("olpc-ec: debugfs cmd 0x%02x with %d args %5ph, want %d returns\n",  in ec_dbgfs_cmd_write()
299 	pr_debug("olpc-ec: response %8ph (%d bytes expected)\n",  in ec_dbgfs_cmd_write()
335 	dbgfs_dir = debugfs_create_dir("olpc-ec", NULL);  in olpc_ec_setup_debugfs()
353 static int olpc_ec_set_dcon_power(struct olpc_ec_priv *ec, bool state)  in olpc_ec_set_dcon_power()  argument
358 	if (ec->dcon_enabled == state)  in olpc_ec_set_dcon_power()
365 	ec->dcon_enabled = state;  in olpc_ec_set_dcon_power()
371 	struct olpc_ec_priv *ec = rdev_get_drvdata(rdev);  in dcon_regulator_enable()  local
373 	return olpc_ec_set_dcon_power(ec, true);  in dcon_regulator_enable()
378 	struct olpc_ec_priv *ec = rdev_get_drvdata(rdev);  in dcon_regulator_disable()  local
380 	return olpc_ec_set_dcon_power(ec, false);  in dcon_regulator_disable()
385 	struct olpc_ec_priv *ec = rdev_get_drvdata(rdev);  in dcon_regulator_is_enabled()  local
387 	return ec->dcon_enabled ? 1 : 0;  in dcon_regulator_is_enabled()
406 	struct olpc_ec_priv *ec;  in olpc_ec_probe()  local
413 	ec = kzalloc(sizeof(*ec), GFP_KERNEL);  in olpc_ec_probe()
414 	if (!ec)  in olpc_ec_probe()
417 	ec->drv = ec_driver;  in olpc_ec_probe()
418 	INIT_WORK(&ec->worker, olpc_ec_worker);  in olpc_ec_probe()
419 	mutex_init(&ec->cmd_lock);  in olpc_ec_probe()
421 	INIT_LIST_HEAD(&ec->cmd_q);  in olpc_ec_probe()
422 	spin_lock_init(&ec->cmd_q_lock);  in olpc_ec_probe()
424 	ec_priv = ec;  in olpc_ec_probe()
425 	platform_set_drvdata(pdev, ec);  in olpc_ec_probe()
427 	/* get the EC revision */  in olpc_ec_probe()
428 	err = olpc_ec_cmd(EC_FIRMWARE_REV, NULL, 0, &ec->version, 1);  in olpc_ec_probe()
433 	config.driver_data = ec;  in olpc_ec_probe()
434 	ec->dcon_enabled = true;  in olpc_ec_probe()
435 	ec->dcon_rdev = devm_regulator_register(&pdev->dev, &dcon_desc,  in olpc_ec_probe()
437 	if (IS_ERR(ec->dcon_rdev)) {  in olpc_ec_probe()
439 		err = PTR_ERR(ec->dcon_rdev);  in olpc_ec_probe()
443 	ec->dbgfs_dir = olpc_ec_setup_debugfs();  in olpc_ec_probe()
449 	kfree(ec);  in olpc_ec_probe()
456 	struct olpc_ec_priv *ec = platform_get_drvdata(pdev);  in olpc_ec_suspend()  local
459 	olpc_ec_mask_write(ec->ec_wakeup_mask);  in olpc_ec_suspend()
464 		ec->suspended = true;  in olpc_ec_suspend()
472 	struct olpc_ec_priv *ec = platform_get_drvdata(pdev);  in olpc_ec_resume()  local
474 	ec->suspended = false;  in olpc_ec_resume()
486 		.name = "olpc-ec",