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sony-laptop: generalise ACPI calls into SNC functions
All calls into the SNC device methods have zero or one arguments and return an integer or a buffer (some functions go as far as returning an integer _or_ a buffer depending on the input parameter...). This allows simplifying a couple of code paths and prepares the field for other users of functions returning buffers. Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Mattia Dongili
Matthew Garrett
parent
3398241b05
commit
ebcef1b0e4
@ -691,59 +691,92 @@ static struct acpi_device *sony_nc_acpi_device = NULL;
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/*
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* acpi_evaluate_object wrappers
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* all useful calls into SNC methods take one or zero parameters and return
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* integers or arrays.
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*/
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static int acpi_callgetfunc(acpi_handle handle, char *name, int *result)
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static union acpi_object *__call_snc_method(acpi_handle handle, char *method,
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u64 *value)
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{
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struct acpi_buffer output;
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union acpi_object out_obj;
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union acpi_object *result = NULL;
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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acpi_status status;
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output.length = sizeof(out_obj);
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output.pointer = &out_obj;
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if (value) {
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struct acpi_object_list params;
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union acpi_object in;
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in.type = ACPI_TYPE_INTEGER;
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in.integer.value = *value;
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params.count = 1;
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params.pointer = ∈
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status = acpi_evaluate_object(handle, method, ¶ms, &output);
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} else
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status = acpi_evaluate_object(handle, method, NULL, &output);
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status = acpi_evaluate_object(handle, name, NULL, &output);
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if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
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*result = out_obj.integer.value;
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return 0;
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if (ACPI_FAILURE(status)) {
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pr_err("Failed to evaluate [%s]\n", method);
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return NULL;
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}
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pr_warn("acpi_callreadfunc failed\n");
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result = (union acpi_object *) output.pointer;
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if (!result)
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dprintk("No return object [%s]\n", method);
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return -1;
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return result;
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}
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static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
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int *result)
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static int sony_nc_int_call(acpi_handle handle, char *name, int *value,
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int *result)
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{
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struct acpi_object_list params;
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union acpi_object in_obj;
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struct acpi_buffer output;
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union acpi_object out_obj;
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acpi_status status;
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union acpi_object *object = NULL;
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if (value) {
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u64 v = *value;
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object = __call_snc_method(handle, name, &v);
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} else
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object = __call_snc_method(handle, name, NULL);
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params.count = 1;
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params.pointer = &in_obj;
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in_obj.type = ACPI_TYPE_INTEGER;
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in_obj.integer.value = value;
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if (!object)
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return -EINVAL;
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output.length = sizeof(out_obj);
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output.pointer = &out_obj;
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status = acpi_evaluate_object(handle, name, ¶ms, &output);
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if (status == AE_OK) {
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if (result != NULL) {
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if (out_obj.type != ACPI_TYPE_INTEGER) {
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pr_warn("acpi_evaluate_object bad return type\n");
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return -1;
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}
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*result = out_obj.integer.value;
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}
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return 0;
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if (object->type != ACPI_TYPE_INTEGER) {
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pr_warn("Invalid acpi_object: expected 0x%x got 0x%x\n",
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ACPI_TYPE_INTEGER, object->type);
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kfree(object);
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return -EINVAL;
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}
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pr_warn("acpi_evaluate_object failed\n");
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if (result)
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*result = object->integer.value;
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return -1;
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kfree(object);
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return 0;
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}
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#define MIN(a, b) (a > b ? b : a)
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static int sony_nc_buffer_call(acpi_handle handle, char *name, u64 *value,
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void *buffer, size_t buflen)
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{
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size_t len = len;
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union acpi_object *object = __call_snc_method(handle, name, value);
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if (!object)
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return -EINVAL;
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if (object->type == ACPI_TYPE_BUFFER)
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len = MIN(buflen, object->buffer.length);
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else if (object->type == ACPI_TYPE_INTEGER)
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len = MIN(buflen, sizeof(object->integer.value));
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else {
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pr_warn("Invalid acpi_object: expected 0x%x got 0x%x\n",
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ACPI_TYPE_BUFFER, object->type);
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kfree(object);
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return -EINVAL;
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}
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memcpy(buffer, object->buffer.pointer, len);
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kfree(object);
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return 0;
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}
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struct sony_nc_handles {
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@ -770,16 +803,17 @@ static ssize_t sony_nc_handles_show(struct device *dev,
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static int sony_nc_handles_setup(struct platform_device *pd)
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{
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int i;
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int result;
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int i, r, result, arg;
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handles = kzalloc(sizeof(*handles), GFP_KERNEL);
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if (!handles)
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return -ENOMEM;
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for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {
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if (!acpi_callsetfunc(sony_nc_acpi_handle,
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"SN00", i + 0x20, &result)) {
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arg = i + 0x20;
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r = sony_nc_int_call(sony_nc_acpi_handle, "SN00", &arg,
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&result);
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if (!r) {
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dprintk("caching handle 0x%.4x (offset: 0x%.2x)\n",
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result, i);
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handles->cap[i] = result;
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@ -835,16 +869,15 @@ static int sony_find_snc_handle(int handle)
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static int sony_call_snc_handle(int handle, int argument, int *result)
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{
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int ret = 0;
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int arg, ret = 0;
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int offset = sony_find_snc_handle(handle);
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if (offset < 0)
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return -1;
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ret = acpi_callsetfunc(sony_nc_acpi_handle, "SN07", offset | argument,
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result);
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dprintk("called SN07 with 0x%.4x (result: 0x%.4x)\n", offset | argument,
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*result);
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arg = offset | argument;
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ret = sony_nc_int_call(sony_nc_acpi_handle, "SN07", &arg, result);
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dprintk("called SN07 with 0x%.4x (result: 0x%.4x)\n", arg, *result);
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return ret;
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}
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@ -889,14 +922,16 @@ static int boolean_validate(const int direction, const int value)
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static ssize_t sony_nc_sysfs_show(struct device *dev, struct device_attribute *attr,
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char *buffer)
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{
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int value;
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int value, ret = 0;
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struct sony_nc_value *item =
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container_of(attr, struct sony_nc_value, devattr);
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if (!*item->acpiget)
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return -EIO;
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if (acpi_callgetfunc(sony_nc_acpi_handle, *item->acpiget, &value) < 0)
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ret = sony_nc_int_call(sony_nc_acpi_handle, *item->acpiget, NULL,
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&value);
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if (ret < 0)
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return -EIO;
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if (item->validate)
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@ -909,7 +944,7 @@ static ssize_t sony_nc_sysfs_store(struct device *dev,
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struct device_attribute *attr,
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const char *buffer, size_t count)
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{
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int value;
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int value, ret = 0;
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struct sony_nc_value *item =
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container_of(attr, struct sony_nc_value, devattr);
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@ -927,8 +962,11 @@ static ssize_t sony_nc_sysfs_store(struct device *dev,
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if (value < 0)
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return value;
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if (acpi_callsetfunc(sony_nc_acpi_handle, *item->acpiset, value, NULL) < 0)
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ret = sony_nc_int_call(sony_nc_acpi_handle, *item->acpiset, &value,
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NULL);
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if (ret < 0)
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return -EIO;
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item->value = value;
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item->valid = 1;
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return count;
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@ -948,15 +986,15 @@ struct sony_backlight_props sony_bl_props;
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static int sony_backlight_update_status(struct backlight_device *bd)
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{
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return acpi_callsetfunc(sony_nc_acpi_handle, "SBRT",
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bd->props.brightness + 1, NULL);
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int arg = bd->props.brightness + 1;
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return sony_nc_int_call(sony_nc_acpi_handle, "SBRT", &arg, NULL);
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}
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static int sony_backlight_get_brightness(struct backlight_device *bd)
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{
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int value;
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if (acpi_callgetfunc(sony_nc_acpi_handle, "GBRT", &value))
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if (sony_nc_int_call(sony_nc_acpi_handle, "GBRT", NULL, &value))
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return 0;
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/* brightness levels are 1-based, while backlight ones are 0-based */
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return value - 1;
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@ -1142,10 +1180,11 @@ static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
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*/
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static int sony_nc_function_setup(struct acpi_device *device)
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{
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int result;
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int result, arg;
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/* Enable all events */
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acpi_callsetfunc(sony_nc_acpi_handle, "SN02", 0xffff, &result);
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arg = 0xffff;
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sony_nc_int_call(sony_nc_acpi_handle, "SN02", &arg, &result);
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/* Setup hotkeys */
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sony_call_snc_handle(0x0100, 0, &result);
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@ -1166,8 +1205,8 @@ static int sony_nc_resume(struct acpi_device *device)
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if (!item->valid)
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continue;
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ret = acpi_callsetfunc(sony_nc_acpi_handle, *item->acpiset,
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item->value, NULL);
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ret = sony_nc_int_call(sony_nc_acpi_handle, *item->acpiset,
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&item->value, NULL);
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if (ret < 0) {
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pr_err("%s: %d\n", __func__, ret);
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break;
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@ -1176,7 +1215,8 @@ static int sony_nc_resume(struct acpi_device *device)
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if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "ECON",
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&handle))) {
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if (acpi_callsetfunc(sony_nc_acpi_handle, "ECON", 1, NULL))
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int arg = 1;
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if (sony_nc_int_call(sony_nc_acpi_handle, "ECON", &arg, NULL))
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dprintk("ECON Method failed\n");
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}
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@ -1314,13 +1354,9 @@ static void sony_nc_rfkill_update(void)
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static void sony_nc_rfkill_setup(struct acpi_device *device)
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{
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int offset;
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u8 dev_code, i;
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acpi_status status;
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struct acpi_object_list params;
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union acpi_object in_obj;
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union acpi_object *device_enum;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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u64 offset;
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int i;
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unsigned char buffer[32] = { 0 };
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offset = sony_find_snc_handle(0x124);
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if (offset == -1) {
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@ -1333,59 +1369,34 @@ static void sony_nc_rfkill_setup(struct acpi_device *device)
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sony_rfkill_handle = 0x124;
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dprintk("Found rkfill handle: 0x%.4x\n", sony_rfkill_handle);
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/* need to read the whole buffer returned by the acpi call to SN06
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* here otherwise we may miss some features
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*/
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params.count = 1;
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params.pointer = &in_obj;
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in_obj.type = ACPI_TYPE_INTEGER;
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in_obj.integer.value = offset;
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status = acpi_evaluate_object(sony_nc_acpi_handle, "SN06", ¶ms,
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&buffer);
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if (ACPI_FAILURE(status)) {
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dprintk("Radio device enumeration failed\n");
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i = sony_nc_buffer_call(sony_nc_acpi_handle, "SN06", &offset, buffer,
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32);
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if (i < 0)
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return;
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}
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device_enum = (union acpi_object *) buffer.pointer;
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if (!device_enum) {
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pr_err("No SN06 return object.");
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return;
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}
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if (device_enum->type != ACPI_TYPE_BUFFER) {
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pr_err("Invalid SN06 return object 0x%.2x\n",
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device_enum->type);
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goto out_no_enum;
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}
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/* the buffer is filled with magic numbers describing the devices
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* available, 0xff terminates the enumeration
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*/
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for (i = 0; i < device_enum->buffer.length; i++) {
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for (i = 0; i < ARRAY_SIZE(buffer); i++) {
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dev_code = *(device_enum->buffer.pointer + i);
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if (dev_code == 0xff)
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if (buffer[i] == 0xff)
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break;
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dprintk("Radio devices, looking at 0x%.2x\n", dev_code);
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dprintk("Radio devices, looking at 0x%.2x\n", buffer[i]);
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if (dev_code == 0 && !sony_rfkill_devices[SONY_WIFI])
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if (buffer[i] == 0 && !sony_rfkill_devices[SONY_WIFI])
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sony_nc_setup_rfkill(device, SONY_WIFI);
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if (dev_code == 0x10 && !sony_rfkill_devices[SONY_BLUETOOTH])
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if (buffer[i] == 0x10 && !sony_rfkill_devices[SONY_BLUETOOTH])
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sony_nc_setup_rfkill(device, SONY_BLUETOOTH);
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if ((0xf0 & dev_code) == 0x20 &&
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if ((0xf0 & buffer[i]) == 0x20 &&
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!sony_rfkill_devices[SONY_WWAN])
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sony_nc_setup_rfkill(device, SONY_WWAN);
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if (dev_code == 0x30 && !sony_rfkill_devices[SONY_WIMAX])
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if (buffer[i] == 0x30 && !sony_rfkill_devices[SONY_WIMAX])
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sony_nc_setup_rfkill(device, SONY_WIMAX);
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}
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out_no_enum:
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kfree(buffer.pointer);
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return;
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}
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/* Keyboard backlight feature */
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@ -1576,14 +1587,10 @@ static void sony_nc_kbd_backlight_resume(void)
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static void sony_nc_backlight_ng_read_limits(int handle,
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struct sony_backlight_props *props)
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{
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int offset;
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acpi_status status;
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u8 brlvl, i;
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u64 offset;
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int i;
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u8 min = 0xff, max = 0x00;
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struct acpi_object_list params;
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union acpi_object in_obj;
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union acpi_object *lvl_enum;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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unsigned char buffer[32] = { 0 };
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props->handle = handle;
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props->offset = 0;
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@ -1596,50 +1603,31 @@ static void sony_nc_backlight_ng_read_limits(int handle,
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/* try to read the boundaries from ACPI tables, if we fail the above
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* defaults should be reasonable
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*/
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params.count = 1;
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params.pointer = &in_obj;
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in_obj.type = ACPI_TYPE_INTEGER;
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in_obj.integer.value = offset;
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status = acpi_evaluate_object(sony_nc_acpi_handle, "SN06", ¶ms,
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&buffer);
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if (ACPI_FAILURE(status))
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i = sony_nc_buffer_call(sony_nc_acpi_handle, "SN06", &offset, buffer,
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32);
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if (i < 0)
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return;
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lvl_enum = (union acpi_object *) buffer.pointer;
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if (!lvl_enum) {
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pr_err("No SN06 return object.");
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return;
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}
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if (lvl_enum->type != ACPI_TYPE_BUFFER) {
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pr_err("Invalid SN06 return object 0x%.2x\n",
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lvl_enum->type);
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goto out_invalid;
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}
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/* the buffer lists brightness levels available, brightness levels are
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* from 0 to 8 in the array, other values are used by ALS control.
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* from position 0 to 8 in the array, other values are used by ALS
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* control.
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*/
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for (i = 0; i < 9 && i < lvl_enum->buffer.length; i++) {
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for (i = 0; i < 9 && i < ARRAY_SIZE(buffer); i++) {
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brlvl = *(lvl_enum->buffer.pointer + i);
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dprintk("Brightness level: %d\n", brlvl);
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dprintk("Brightness level: %d\n", buffer[i]);
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if (!brlvl)
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if (!buffer[i])
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break;
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if (brlvl > max)
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max = brlvl;
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if (brlvl < min)
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min = brlvl;
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if (buffer[i] > max)
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max = buffer[i];
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if (buffer[i] < min)
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min = buffer[i];
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}
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props->offset = min;
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props->maxlvl = max;
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dprintk("Brightness levels: min=%d max=%d\n", props->offset,
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props->maxlvl);
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out_invalid:
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kfree(buffer.pointer);
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return;
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}
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static void sony_nc_backlight_setup(void)
|
||||
@ -1728,7 +1716,8 @@ static int sony_nc_add(struct acpi_device *device)
|
||||
|
||||
if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "ECON",
|
||||
&handle))) {
|
||||
if (acpi_callsetfunc(sony_nc_acpi_handle, "ECON", 1, NULL))
|
||||
int arg = 1;
|
||||
if (sony_nc_int_call(sony_nc_acpi_handle, "ECON", &arg, NULL))
|
||||
dprintk("ECON Method failed\n");
|
||||
}
|
||||
|
||||
@ -2684,7 +2673,8 @@ static long sonypi_misc_ioctl(struct file *fp, unsigned int cmd,
|
||||
ret = -EIO;
|
||||
break;
|
||||
}
|
||||
if (acpi_callgetfunc(sony_nc_acpi_handle, "GBRT", &value)) {
|
||||
if (sony_nc_int_call(sony_nc_acpi_handle, "GBRT", NULL,
|
||||
&value)) {
|
||||
ret = -EIO;
|
||||
break;
|
||||
}
|
||||
@ -2701,8 +2691,9 @@ static long sonypi_misc_ioctl(struct file *fp, unsigned int cmd,
|
||||
ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
if (acpi_callsetfunc(sony_nc_acpi_handle, "SBRT",
|
||||
(val8 >> 5) + 1, NULL)) {
|
||||
value = (val8 >> 5) + 1;
|
||||
if (sony_nc_int_call(sony_nc_acpi_handle, "SBRT", &value,
|
||||
NULL)) {
|
||||
ret = -EIO;
|
||||
break;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user