diff options
Diffstat (limited to 'drivers/misc/mei/init.c')
| -rw-r--r-- | drivers/misc/mei/init.c | 86 |
1 files changed, 59 insertions, 27 deletions
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 6ec530168af..713d89fedc4 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -14,6 +14,7 @@ * */ +#include <linux/export.h> #include <linux/pci.h> #include <linux/sched.h> #include <linux/wait.h> @@ -22,6 +23,7 @@ #include <linux/mei.h> #include "mei_dev.h" +#include "hbm.h" #include "client.h" const char *mei_dev_state_str(int state) @@ -31,9 +33,8 @@ const char *mei_dev_state_str(int state) MEI_DEV_STATE(INITIALIZING); MEI_DEV_STATE(INIT_CLIENTS); MEI_DEV_STATE(ENABLED); - MEI_DEV_STATE(RESETING); + MEI_DEV_STATE(RESETTING); MEI_DEV_STATE(DISABLED); - MEI_DEV_STATE(RECOVERING_FROM_RESET); MEI_DEV_STATE(POWER_DOWN); MEI_DEV_STATE(POWER_UP); default: @@ -46,7 +47,9 @@ void mei_device_init(struct mei_device *dev) { /* setup our list array */ INIT_LIST_HEAD(&dev->file_list); + INIT_LIST_HEAD(&dev->device_list); mutex_init(&dev->device_lock); + init_waitqueue_head(&dev->wait_hw_ready); init_waitqueue_head(&dev->wait_recvd_msg); init_waitqueue_head(&dev->wait_stop_wd); dev->dev_state = MEI_DEV_INITIALIZING; @@ -56,19 +59,27 @@ void mei_device_init(struct mei_device *dev) mei_io_list_init(&dev->write_waiting_list); mei_io_list_init(&dev->ctrl_wr_list); mei_io_list_init(&dev->ctrl_rd_list); + + INIT_DELAYED_WORK(&dev->timer_work, mei_timer); + INIT_WORK(&dev->init_work, mei_host_client_init); + + INIT_LIST_HEAD(&dev->wd_cl.link); + INIT_LIST_HEAD(&dev->iamthif_cl.link); + mei_io_list_init(&dev->amthif_cmd_list); + mei_io_list_init(&dev->amthif_rd_complete_list); + } +EXPORT_SYMBOL_GPL(mei_device_init); /** - * mei_hw_init - initializes host and fw to start work. + * mei_start - initializes host and fw to start work. * * @dev: the device structure * * returns 0 on success, <0 on failure. */ -int mei_hw_init(struct mei_device *dev) +int mei_start(struct mei_device *dev) { - int ret = 0; - mutex_lock(&dev->device_lock); /* acknowledge interrupt and stop interupts */ @@ -76,29 +87,15 @@ int mei_hw_init(struct mei_device *dev) mei_hw_config(dev); - dev->recvd_msg = false; dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); mei_reset(dev, 1); - /* wait for ME to turn on ME_RDY */ - if (!dev->recvd_msg) { - mutex_unlock(&dev->device_lock); - ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, - dev->recvd_msg, - mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); - mutex_lock(&dev->device_lock); - } - - if (ret <= 0 && !dev->recvd_msg) { - dev->dev_state = MEI_DEV_DISABLED; - dev_dbg(&dev->pdev->dev, - "wait_event_interruptible_timeout failed" - "on wait for ME to turn on ME_RDY.\n"); + if (mei_hbm_start_wait(dev)) { + dev_err(&dev->pdev->dev, "HBM haven't started"); goto err; } - if (!mei_host_is_ready(dev)) { dev_err(&dev->pdev->dev, "host is not ready.\n"); goto err; @@ -115,7 +112,6 @@ int mei_hw_init(struct mei_device *dev) goto err; } - dev->recvd_msg = false; dev_dbg(&dev->pdev->dev, "link layer has been established.\n"); mutex_unlock(&dev->device_lock); @@ -126,6 +122,7 @@ err: mutex_unlock(&dev->device_lock); return -ENODEV; } +EXPORT_SYMBOL_GPL(mei_start); /** * mei_reset - resets host and fw. @@ -137,9 +134,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) { bool unexpected; - if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) - return; - unexpected = (dev->dev_state != MEI_DEV_INITIALIZING && dev->dev_state != MEI_DEV_DISABLED && dev->dev_state != MEI_DEV_POWER_DOWN && @@ -147,11 +141,12 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) mei_hw_reset(dev, interrupts_enabled); + dev->hbm_state = MEI_HBM_IDLE; if (dev->dev_state != MEI_DEV_INITIALIZING) { if (dev->dev_state != MEI_DEV_DISABLED && dev->dev_state != MEI_DEV_POWER_DOWN) - dev->dev_state = MEI_DEV_RESETING; + dev->dev_state = MEI_DEV_RESETTING; mei_cl_all_disconnect(dev); @@ -176,13 +171,50 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n", mei_dev_state_str(dev->dev_state)); + if (!interrupts_enabled) { + dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n"); + return; + } + + mei_hw_start(dev); + + dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); + /* link is established * start sending messages. */ + + dev->dev_state = MEI_DEV_INIT_CLIENTS; + + mei_hbm_start_req(dev); + /* wake up all readings so they can be interrupted */ mei_cl_all_read_wakeup(dev); /* remove all waiting requests */ mei_cl_all_write_clear(dev); } +EXPORT_SYMBOL_GPL(mei_reset); + +void mei_stop(struct mei_device *dev) +{ + dev_dbg(&dev->pdev->dev, "stopping the device.\n"); + + mutex_lock(&dev->device_lock); + + cancel_delayed_work(&dev->timer_work); + mei_wd_stop(dev); + + mei_nfc_host_exit(); + + dev->dev_state = MEI_DEV_POWER_DOWN; + mei_reset(dev, 0); + + mutex_unlock(&dev->device_lock); + + flush_scheduled_work(); + + mei_watchdog_unregister(dev); +} +EXPORT_SYMBOL_GPL(mei_stop); |