[PATCH] sony-laptop: add support for Sony Vaio Fit multi-flip laptop/presentation/tablet transformation

Alexander Gavrilenko
2014-11-20T08:52:06Z

Current mode is exported via sysfs:
/sys/devices/platform/sony-laptop/tablet

Signed-off-by: Alexander Gavrilenko <alexander.gavrilenko@gmail.com>
---
--- linux-3.17.3/drivers/platform/x86/sony-laptop.c.orig 2014-11-19 13:15:35.965048636 +0300
+++ linux-3.17.3/drivers/platform/x86/sony-laptop.c 2014-11-19 13:17:21.139166837 +0300
@@ -135,6 +135,13 @@ MODULE_PARM_DESC(kbd_backlight_timeout,
"meaningful values vary from 0 to 3 and their meaning depends "
"on the model (default: no change from current value)");

+static int tablet_mode = 2;
+module_param(tablet_mode, int, 0);
+MODULE_PARM_DESC(tablet_mode,
+ "set this if your laptop have different tablet mode value, "
+ "default is 2 (Sony Vaio Fit multi-flip), "
+ "only affects SW_TABLET_MODE events");
+
#ifdef CONFIG_PM_SLEEP
static void sony_nc_thermal_resume(void);
#endif
@@ -181,6 +188,11 @@ static int sony_nc_touchpad_setup(struct
unsigned int handle);
static void sony_nc_touchpad_cleanup(struct platform_device *pd);

+static int sony_nc_tablet_mode_setup(struct platform_device *pd,
+ unsigned int handle);
+static void sony_nc_tablet_mode_cleanup(struct platform_device *pd);
+static int sony_nc_tablet_mode_update(void);
+
enum sony_nc_rfkill {
SONY_WIFI,
SONY_BLUETOOTH,
@@ -1198,7 +1210,8 @@ static int sony_nc_hotkeys_decode(u32 ev
enum event_types {
HOTKEY = 1,
KILLSWITCH,
- GFX_SWITCH
+ GFX_SWITCH,
+ TABLET_MODE_SWITCH
};
static void sony_nc_notify(struct acpi_device *device, u32 event)
{
@@ -1273,6 +1286,10 @@ static void sony_nc_notify(struct acpi_d
ev_type = GFX_SWITCH;
real_ev = __sony_nc_gfx_switch_status_get();
break;
+ case 0x016f:
+ ev_type = TABLET_MODE_SWITCH;
+ real_ev = sony_nc_tablet_mode_update();
+ break;
default:
dprintk("Unknown event 0x%x for handle 0x%x\n",
event, handle);
@@ -1428,6 +1445,13 @@ static void sony_nc_function_setup(struc
pr_err("couldn't set up smart connect support (%d)\n",
result);
break;
+ case 0x016f:
+ /* laptop/presentation/tablet transformation for Sony Vaio Fit 11a/13a/14a/15a */
+ result = sony_nc_tablet_mode_setup(pf_device, handle);
+ if (result)
+ pr_err("couldn't set up tablet mode support (%d)\n",
+ result);
+ break;
default:
continue;
}
@@ -1507,6 +1531,9 @@ static void sony_nc_function_cleanup(str
case 0x0168:
sony_nc_smart_conn_cleanup(pd);
break;
+ case 0x016f:
+ sony_nc_tablet_mode_cleanup(pd);
+ break;
default:
continue;
}
@@ -1547,6 +1574,12 @@ static void sony_nc_function_resume(void
case 0x0135:
sony_nc_rfkill_update();
break;
+ case 0x016f:
+ /* re-enable transformation events */
+ sony_call_snc_handle(handle, 0, &result);
+ acpi_bus_generate_netlink_event(sony_nc_acpi_device->pnp.device_class,
+ dev_name(&sony_nc_acpi_device->dev), TABLET_MODE_SWITCH, sony_nc_tablet_mode_update());
+ break;
default:
continue;
}
@@ -3145,6 +3178,97 @@ static void sony_nc_backlight_cleanup(vo
backlight_device_unregister(sony_bl_props.dev);
}

+/* laptop/presentation/tablet mode for Sony Vaio Fit 11a/13a/14a/15a */
+struct snc_tablet_control {
+ struct device_attribute attr;
+ int handle;
+ int mode;
+};
+static struct snc_tablet_control *tablet_ctl;
+
+static ssize_t sony_nc_tablet_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ if(!tablet_ctl)
+ return -EIO;
+
+ return snprintf(buffer, PAGE_SIZE, "%d\n", tablet_ctl->mode);
+}
+
+static int sony_nc_tablet_mode_update(void) {
+ struct input_dev *key_dev = sony_laptop_input.key_dev;
+
+ if (!key_dev)
+ return -1;
+
+ if (!tablet_ctl)
+ return -1;
+
+ if (sony_call_snc_handle(tablet_ctl->handle, 0x0200, &tablet_ctl->mode))
+ return -1;
+
+ input_report_switch(key_dev, SW_TABLET_MODE, tablet_ctl->mode == tablet_mode);
+ input_sync(key_dev);
+
+ return tablet_ctl->mode;
+}
+
+static int sony_nc_tablet_mode_setup(struct platform_device *pd,
+ unsigned int handle)
+{
+ struct input_dev *key_dev = sony_laptop_input.key_dev;
+ int value, ret;
+
+ if (tablet_ctl) {
+ pr_warn("handle 0x%.4x: laptop/presentation/tablet mode control setup already done for 0x%.4x\n",
+ handle, tablet_ctl->handle);
+ return -EBUSY;
+ }
+
+ if (sony_call_snc_handle(handle, 0x0000, &value))
+ return -EIO;
+
+ tablet_ctl = kzalloc(sizeof(struct snc_tablet_control), GFP_KERNEL);
+ if (!tablet_ctl)
+ return -ENOMEM;
+
+ tablet_ctl->handle = handle;
+
+ sysfs_attr_init(&tablet_ctl->attr.attr);
+ tablet_ctl->attr.attr.name = "tablet";
+ tablet_ctl->attr.attr.mode = S_IRUGO;
+ tablet_ctl->attr.show = sony_nc_tablet_mode_show;
+ tablet_ctl->attr.store = NULL;
+
+ if (key_dev)
+ input_set_capability(key_dev, EV_SW, SW_TABLET_MODE);
+
+ ret = device_create_file(&pd->dev, &tablet_ctl->attr);
+ if (ret)
+ goto tablet_error;
+ return 0;
+
+tablet_error:
+ device_remove_file(&pd->dev, &tablet_ctl->attr);
+ kfree(tablet_ctl);
+ tablet_ctl = NULL;
+ sony_call_snc_handle(handle, 0x0100, &value);
+ return ret;
+}
+
+static void sony_nc_tablet_mode_cleanup(struct platform_device *pd)
+{
+ int value;
+
+ if(tablet_ctl) {
+ device_remove_file(&pd->dev, &tablet_ctl->attr);
+ sony_call_snc_handle(tablet_ctl->handle, 0x0100, &value);
+ kfree(tablet_ctl);
+ tablet_ctl = NULL;
+ }
+}
+
static int sony_nc_add(struct acpi_device *device)
{
acpi_status status;