diff options
| author | Himanshu Aggarwal <haggarwa@codeaurora.org> | 2015-11-25 15:30:11 +0530 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 21:21:50 -0700 |
| commit | 549e2df905e3efb2bd1d9e215e5f6cd2fa5058ba (patch) | |
| tree | f0f5911334524c4b9107e117298a53e97a9c03c8 /drivers/input | |
| parent | fadba675b345a7d94ff252c0fa541da30e908bf3 (diff) | |
input: synaptics_dsx_i2c: add support for QUP ownership transfer
Add support for QUP ownership transfer to other subsystems to
support the secure touch usecase.
Change-Id: I70fd5fb81ce8763095bcfa2feb71d9d806d14bd4
Signed-off-by: Himanshu Aggarwal <haggarwa@codeaurora.org>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c b/drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c index 6aa14fe54e69..e4262bf0e612 100644 --- a/drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c +++ b/drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c @@ -34,6 +34,13 @@ #endif #if defined(CONFIG_SECURE_TOUCH) #include <linux/errno.h> +#include <soc/qcom/scm.h> +enum subsystem { + TZ = 1, + APSS = 3 +}; + +#define TZ_BLSP_MODIFY_OWNERSHIP_ID 3 #endif #define INPUT_PHYS_NAME "synaptics_dsx/input0" @@ -460,6 +467,28 @@ DEFINE_SIMPLE_ATTRIBUTE(debug_suspend_fops, synaptics_rmi4_debug_suspend_get, synaptics_rmi4_debug_suspend_set, "%lld\n"); #if defined(CONFIG_SECURE_TOUCH) +static int synaptics_i2c_change_pipe_owner( + struct synaptics_rmi4_data *rmi4_data, enum subsystem subsystem) +{ + /*scm call descriptor */ + struct scm_desc desc; + struct i2c_client *i2c = to_i2c_client(rmi4_data->pdev->dev.parent); + int ret = 0; + + /* number of arguments */ + desc.arginfo = SCM_ARGS(2); + /* BLSPID (1-12) */ + desc.args[0] = i2c->adapter->nr; + /* Owner if TZ or APSS */ + desc.args[1] = subsystem; + ret = scm_call2(SCM_SIP_FNID(SCM_SVC_TZ, TZ_BLSP_MODIFY_OWNERSHIP_ID), + &desc); + if (ret) + return ret; + + return desc.ret[0]; +} + static void synaptics_secure_touch_init(struct synaptics_rmi4_data *data) { int ret = 0; @@ -584,6 +613,7 @@ static ssize_t synaptics_secure_touch_enable_store(struct device *dev, if (atomic_read(&rmi4_data->st_enabled) == 0) break; + synaptics_i2c_change_pipe_owner(rmi4_data, APSS); synaptics_rmi4_bus_put(rmi4_data); atomic_set(&rmi4_data->st_enabled, 0); synaptics_secure_touch_notify(rmi4_data); @@ -607,6 +637,7 @@ static ssize_t synaptics_secure_touch_enable_store(struct device *dev, err = -EIO; break; } + synaptics_i2c_change_pipe_owner(rmi4_data, TZ); reinit_completion(&rmi4_data->st_powerdown); reinit_completion(&rmi4_data->st_irq_processed); atomic_set(&rmi4_data->st_enabled, 1); |