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| author | Tomas Winkler <tomas.winkler@intel.com> | 2014-08-21 14:29:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-23 22:57:48 -0700 |
| commit | bae1cc7d41fd3048f55c21a6e59c35a3f0abaafe (patch) | |
| tree | 368091f74129915864cc221147dafd8439ec0dec /drivers/misc/mei | |
| parent | 2af89db1d61a872e5f2f1fb18d44cf5d8f5f6a2a (diff) | |
| download | linux-exynos-bae1cc7d41fd3048f55c21a6e59c35a3f0abaafe.tar.gz linux-exynos-bae1cc7d41fd3048f55c21a6e59c35a3f0abaafe.tar.bz2 linux-exynos-bae1cc7d41fd3048f55c21a6e59c35a3f0abaafe.zip | |
mei: extract supported features from the hbm version
extract supported hbm features and commands from the hbm version
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei')
| -rw-r--r-- | drivers/misc/mei/hbm.c | 25 | ||||
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 6 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 4 |
3 files changed, 29 insertions, 6 deletions
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 280befc46d11..9fc051b7f1a3 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -372,7 +372,8 @@ static int mei_hbm_prop_req(struct mei_device *dev) * @dev: the device structure * @pg_cmd: the pg command code * - * This function returns -EIO on write failure + * returns -EIO on write failure + * -EOPNOTSUPP if the operation is not supported by the protocol */ int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) { @@ -381,6 +382,9 @@ int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) const size_t len = sizeof(struct hbm_power_gate); int ret; + if (!dev->hbm_f_pg_supported) + return -EOPNOTSUPP; + mei_hbm_hdr(mei_hdr, len); req = (struct hbm_power_gate *)dev->wr_msg.data; @@ -660,6 +664,23 @@ static int mei_hbm_fw_disconnect_req(struct mei_device *dev, return 0; } +/** + * mei_hbm_config_features: check what hbm features and commands + * are supported by the fw + * + * @dev: the device structure + */ +static void mei_hbm_config_features(struct mei_device *dev) +{ + /* Power Gating Isolation Support */ + dev->hbm_f_pg_supported = 0; + if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) + dev->hbm_f_pg_supported = 1; + + if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && + dev->version.minor_version >= HBM_MINOR_VERSION_PGI) + dev->hbm_f_pg_supported = 1; +} /** * mei_hbm_version_is_supported - checks whether the driver can @@ -743,6 +764,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) break; } + mei_hbm_config_features(dev); + if (dev->dev_state != MEI_DEV_INIT_CLIENTS || dev->hbm_state != MEI_HBM_STARTING) { dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index caf0da335994..498bd42bca25 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -574,11 +574,7 @@ static bool mei_me_pg_is_enabled(struct mei_device *dev) if ((reg & ME_PGIC_HRA) == 0) goto notsupported; - if (dev->version.major_version < HBM_MAJOR_VERSION_PGI) - goto notsupported; - - if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && - dev->version.minor_version < HBM_MINOR_VERSION_PGI) + if (!dev->hbm_f_pg_supported) goto notsupported; return true; diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 79124ae6a249..719edeeb3ceb 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -402,6 +402,9 @@ struct mei_cfg { * * @reset_count - limits the number of consecutive resets * @hbm_state - state of host bus message protocol + * + * @hbm_f_pg_supported - hbm feature pgi protocol + * * @pg_event - power gating event * @mem_addr - mem mapped base register address @@ -476,6 +479,7 @@ struct mei_device { } wr_msg; struct hbm_version version; + unsigned int hbm_f_pg_supported:1; struct list_head me_clients; DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX); |