#include <acpi/acpi_bus.h>
#include <linux/pci.h>
-#define ATPX_VERSION 0
-#define ATPX_GPU_PWR 2
-#define ATPX_MUX_SELECT 3
-#define ATPX_I2C_MUX_SELECT 4
-#define ATPX_SWITCH_START 5
-#define ATPX_SWITCH_END 6
-
-#define ATPX_INTEGRATED 0
-#define ATPX_DISCRETE 1
+#include "radeon_acpi.h"
+
+struct radeon_atpx_functions {
+ bool px_params;
+ bool power_cntl;
+ bool disp_mux_cntl;
+ bool i2c_mux_cntl;
+ bool switch_start;
+ bool switch_end;
+ bool disp_connectors_mapping;
+ bool disp_detetion_ports;
+};
-#define ATPX_MUX_IGD 0
-#define ATPX_MUX_DISCRETE 1
+struct radeon_atpx {
+ acpi_handle handle;
+ struct radeon_atpx_functions functions;
+};
static struct radeon_atpx_priv {
bool atpx_detected;
/* handle for device - and atpx */
acpi_handle dhandle;
- acpi_handle atpx_handle;
- acpi_handle atrm_handle;
+ struct radeon_atpx atpx;
} radeon_atpx_priv;
-/* retrieve the ROM in 4k blocks */
-static int radeon_atrm_call(acpi_handle atrm_handle, uint8_t *bios,
- int offset, int len)
-{
- acpi_status status;
- union acpi_object atrm_arg_elements[2], *obj;
- struct acpi_object_list atrm_arg;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
-
- atrm_arg.count = 2;
- atrm_arg.pointer = &atrm_arg_elements[0];
-
- atrm_arg_elements[0].type = ACPI_TYPE_INTEGER;
- atrm_arg_elements[0].integer.value = offset;
-
- atrm_arg_elements[1].type = ACPI_TYPE_INTEGER;
- atrm_arg_elements[1].integer.value = len;
-
- status = acpi_evaluate_object(atrm_handle, NULL, &atrm_arg, &buffer);
- if (ACPI_FAILURE(status)) {
- printk("failed to evaluate ATRM got %s\n", acpi_format_exception(status));
- return -ENODEV;
- }
-
- obj = (union acpi_object *)buffer.pointer;
- memcpy(bios+offset, obj->buffer.pointer, obj->buffer.length);
- len = obj->buffer.length;
- kfree(buffer.pointer);
- return len;
-}
-
-bool radeon_atrm_supported(struct pci_dev *pdev)
-{
- /* get the discrete ROM only via ATRM */
- if (!radeon_atpx_priv.atpx_detected)
- return false;
-
- if (radeon_atpx_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev))
- return false;
- return true;
-}
+struct atpx_verify_interface {
+ u16 size; /* structure size in bytes (includes size field) */
+ u16 version; /* version */
+ u32 function_bits; /* supported functions bit vector */
+} __packed;
+struct atpx_power_control {
+ u16 size;
+ u8 dgpu_state;
+} __packed;
-int radeon_atrm_get_bios_chunk(uint8_t *bios, int offset, int len)
-{
- return radeon_atrm_call(radeon_atpx_priv.atrm_handle, bios, offset, len);
-}
+struct atpx_mux {
+ u16 size;
+ u16 mux;
+} __packed;
-static int radeon_atpx_get_version(acpi_handle handle)
+/**
+ * radeon_atpx_call - call an ATPX method
+ *
+ * @handle: acpi handle
+ * @function: the ATPX function to execute
+ * @params: ATPX function params
+ *
+ * Executes the requested ATPX function (all asics).
+ * Returns a pointer to the acpi output buffer.
+ */
+static union acpi_object *radeon_atpx_call(acpi_handle handle, int function,
+ struct acpi_buffer *params)
{
acpi_status status;
- union acpi_object atpx_arg_elements[2], *obj;
+ union acpi_object atpx_arg_elements[2];
struct acpi_object_list atpx_arg;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
atpx_arg.pointer = &atpx_arg_elements[0];
atpx_arg_elements[0].type = ACPI_TYPE_INTEGER;
- atpx_arg_elements[0].integer.value = ATPX_VERSION;
+ atpx_arg_elements[0].integer.value = function;
+
+ if (params) {
+ atpx_arg_elements[1].type = ACPI_TYPE_BUFFER;
+ atpx_arg_elements[1].buffer.length = params->length;
+ atpx_arg_elements[1].buffer.pointer = params->pointer;
+ } else {
+ /* We need a second fake parameter */
+ atpx_arg_elements[1].type = ACPI_TYPE_INTEGER;
+ atpx_arg_elements[1].integer.value = 0;
+ }
- atpx_arg_elements[1].type = ACPI_TYPE_INTEGER;
- atpx_arg_elements[1].integer.value = ATPX_VERSION;
+ status = acpi_evaluate_object(handle, "ATPX", &atpx_arg, &buffer);
- status = acpi_evaluate_object(handle, NULL, &atpx_arg, &buffer);
- if (ACPI_FAILURE(status)) {
- printk("%s: failed to call ATPX: %s\n", __func__, acpi_format_exception(status));
- return -ENOSYS;
+ /* Fail only if calling the method fails and ATPX is supported */
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ printk("failed to evaluate ATPX got %s\n",
+ acpi_format_exception(status));
+ kfree(buffer.pointer);
+ return NULL;
}
- obj = (union acpi_object *)buffer.pointer;
- if (obj && (obj->type == ACPI_TYPE_BUFFER))
- printk(KERN_INFO "radeon atpx: version is %d\n", *((u8 *)(obj->buffer.pointer) + 2));
- kfree(buffer.pointer);
- return 0;
+
+ return buffer.pointer;
}
-static int radeon_atpx_execute(acpi_handle handle, int cmd_id, u16 value)
+/**
+ * radeon_atpx_parse_functions - parse supported functions
+ *
+ * @f: supported functions struct
+ * @mask: supported functions mask from ATPX
+ *
+ * Use the supported functions mask from ATPX function
+ * ATPX_FUNCTION_VERIFY_INTERFACE to determine what functions
+ * are supported (all asics).
+ */
+static void radeon_atpx_parse_functions(struct radeon_atpx_functions *f, u32 mask)
{
- acpi_status status;
- union acpi_object atpx_arg_elements[2];
- struct acpi_object_list atpx_arg;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- uint8_t buf[4] = {0};
-
- if (!handle)
- return -EINVAL;
-
- atpx_arg.count = 2;
- atpx_arg.pointer = &atpx_arg_elements[0];
+ f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;
+ f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;
+ f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;
+ f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;
+ f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;
+ f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;
+ f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;
+ f->disp_detetion_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;
+}
- atpx_arg_elements[0].type = ACPI_TYPE_INTEGER;
- atpx_arg_elements[0].integer.value = cmd_id;
+/**
+ * radeon_atpx_verify_interface - verify ATPX
+ *
+ * @handle: acpi handle
+ * @atpx: radeon atpx struct
+ *
+ * Execute the ATPX_FUNCTION_VERIFY_INTERFACE ATPX function
+ * to initialize ATPX and determine what features are supported
+ * (all asics).
+ * returns 0 on success, error on failure.
+ */
+static int radeon_atpx_verify_interface(struct radeon_atpx *atpx)
+{
+ union acpi_object *info;
+ struct atpx_verify_interface output;
+ size_t size;
+ int err = 0;
+
+ info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);
+ if (!info)
+ return -EIO;
+
+ memset(&output, 0, sizeof(output));
+
+ size = *(u16 *) info->buffer.pointer;
+ if (size < 8) {
+ printk("ATPX buffer is too small: %lu\n", size);
+ err = -EINVAL;
+ goto out;
+ }
+ size = min(sizeof(output), size);
- buf[2] = value & 0xff;
- buf[3] = (value >> 8) & 0xff;
+ memcpy(&output, info->buffer.pointer, size);
- atpx_arg_elements[1].type = ACPI_TYPE_BUFFER;
- atpx_arg_elements[1].buffer.length = 4;
- atpx_arg_elements[1].buffer.pointer = buf;
+ /* TODO: check version? */
+ printk("ATPX version %u\n", output.version);
- status = acpi_evaluate_object(handle, NULL, &atpx_arg, &buffer);
- if (ACPI_FAILURE(status)) {
- printk("%s: failed to call ATPX: %s\n", __func__, acpi_format_exception(status));
- return -ENOSYS;
- }
- kfree(buffer.pointer);
+ radeon_atpx_parse_functions(&atpx->functions, output.function_bits);
- return 0;
+out:
+ kfree(info);
+ return err;
}
-static int radeon_atpx_set_discrete_state(acpi_handle handle, int state)
+static int radeon_atpx_set_discrete_state(struct radeon_atpx *atpx, u8 state)
{
- return radeon_atpx_execute(handle, ATPX_GPU_PWR, state);
+ struct acpi_buffer params;
+ union acpi_object *info;
+ struct atpx_power_control input;
+
+ if (atpx->functions.power_cntl) {
+ input.size = 3;
+ input.dgpu_state = state;
+ params.length = input.size;
+ params.pointer = &input;
+ info = radeon_atpx_call(atpx->handle,
+ ATPX_FUNCTION_POWER_CONTROL,
+ ¶ms);
+ if (!info)
+ return -EIO;
+ kfree(info);
+ }
+ return 0;
}
-static int radeon_atpx_switch_mux(acpi_handle handle, int mux_id)
+static int radeon_atpx_switch_disp_mux(struct radeon_atpx *atpx, u16 mux_id)
{
- return radeon_atpx_execute(handle, ATPX_MUX_SELECT, mux_id);
+ struct acpi_buffer params;
+ union acpi_object *info;
+ struct atpx_mux input;
+
+ if (atpx->functions.disp_mux_cntl) {
+ input.size = 4;
+ input.mux = mux_id;
+ params.length = input.size;
+ params.pointer = &input;
+ info = radeon_atpx_call(atpx->handle,
+ ATPX_FUNCTION_DISPLAY_MUX_CONTROL,
+ ¶ms);
+ if (!info)
+ return -EIO;
+ kfree(info);
+ }
+ return 0;
}
-static int radeon_atpx_switch_i2c_mux(acpi_handle handle, int mux_id)
+static int radeon_atpx_switch_i2c_mux(struct radeon_atpx *atpx, u16 mux_id)
{
- return radeon_atpx_execute(handle, ATPX_I2C_MUX_SELECT, mux_id);
+ struct acpi_buffer params;
+ union acpi_object *info;
+ struct atpx_mux input;
+
+ if (atpx->functions.i2c_mux_cntl) {
+ input.size = 4;
+ input.mux = mux_id;
+ params.length = input.size;
+ params.pointer = &input;
+ info = radeon_atpx_call(atpx->handle,
+ ATPX_FUNCTION_I2C_MUX_CONTROL,
+ ¶ms);
+ if (!info)
+ return -EIO;
+ kfree(info);
+ }
+ return 0;
}
-static int radeon_atpx_switch_start(acpi_handle handle, int gpu_id)
+static int radeon_atpx_switch_start(struct radeon_atpx *atpx, u16 mux_id)
{
- return radeon_atpx_execute(handle, ATPX_SWITCH_START, gpu_id);
+ struct acpi_buffer params;
+ union acpi_object *info;
+ struct atpx_mux input;
+
+ if (atpx->functions.switch_start) {
+ input.size = 4;
+ input.mux = mux_id;
+ params.length = input.size;
+ params.pointer = &input;
+ info = radeon_atpx_call(atpx->handle,
+ ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION,
+ ¶ms);
+ if (!info)
+ return -EIO;
+ kfree(info);
+ }
+ return 0;
}
-static int radeon_atpx_switch_end(acpi_handle handle, int gpu_id)
+static int radeon_atpx_switch_end(struct radeon_atpx *atpx, u16 mux_id)
{
- return radeon_atpx_execute(handle, ATPX_SWITCH_END, gpu_id);
+ struct acpi_buffer params;
+ union acpi_object *info;
+ struct atpx_mux input;
+
+ if (atpx->functions.switch_end) {
+ input.size = 4;
+ input.mux = mux_id;
+ params.length = input.size;
+ params.pointer = &input;
+ info = radeon_atpx_call(atpx->handle,
+ ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION,
+ ¶ms);
+ if (!info)
+ return -EIO;
+ kfree(info);
+ }
+ return 0;
}
static int radeon_atpx_switchto(enum vga_switcheroo_client_id id)
{
- int gpu_id;
+ u16 gpu_id;
if (id == VGA_SWITCHEROO_IGD)
- gpu_id = ATPX_INTEGRATED;
+ gpu_id = ATPX_INTEGRATED_GPU;
else
- gpu_id = ATPX_DISCRETE;
+ gpu_id = ATPX_DISCRETE_GPU;
- radeon_atpx_switch_start(radeon_atpx_priv.atpx_handle, gpu_id);
- radeon_atpx_switch_mux(radeon_atpx_priv.atpx_handle, gpu_id);
- radeon_atpx_switch_i2c_mux(radeon_atpx_priv.atpx_handle, gpu_id);
- radeon_atpx_switch_end(radeon_atpx_priv.atpx_handle, gpu_id);
+ radeon_atpx_switch_start(&radeon_atpx_priv.atpx, gpu_id);
+ radeon_atpx_switch_disp_mux(&radeon_atpx_priv.atpx, gpu_id);
+ radeon_atpx_switch_i2c_mux(&radeon_atpx_priv.atpx, gpu_id);
+ radeon_atpx_switch_end(&radeon_atpx_priv.atpx, gpu_id);
return 0;
}
if (id == VGA_SWITCHEROO_IGD)
return 0;
- radeon_atpx_set_discrete_state(radeon_atpx_priv.atpx_handle, state);
+ radeon_atpx_set_discrete_state(&radeon_atpx_priv.atpx, state);
return 0;
}
static bool radeon_atpx_pci_probe_handle(struct pci_dev *pdev)
{
- acpi_handle dhandle, atpx_handle, atrm_handle;
+ acpi_handle dhandle, atpx_handle;
acpi_status status;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (ACPI_FAILURE(status))
return false;
- status = acpi_get_handle(dhandle, "ATRM", &atrm_handle);
- if (ACPI_FAILURE(status))
- return false;
-
radeon_atpx_priv.dhandle = dhandle;
- radeon_atpx_priv.atpx_handle = atpx_handle;
- radeon_atpx_priv.atrm_handle = atrm_handle;
+ radeon_atpx_priv.atpx.handle = atpx_handle;
return true;
}
static int radeon_atpx_init(void)
{
/* set up the ATPX handle */
-
- radeon_atpx_get_version(radeon_atpx_priv.atpx_handle);
- return 0;
+ return radeon_atpx_verify_interface(&radeon_atpx_priv.atpx);
}
static int radeon_atpx_get_client_id(struct pci_dev *pdev)
}
if (has_atpx && vga_count == 2) {
- acpi_get_name(radeon_atpx_priv.atpx_handle, ACPI_FULL_PATHNAME, &buffer);
+ acpi_get_name(radeon_atpx_priv.atpx.handle, ACPI_FULL_PATHNAME, &buffer);
printk(KERN_INFO "VGA switcheroo: detected switching method %s handle\n",
acpi_method_name);
radeon_atpx_priv.atpx_detected = true;
projects / linux-2.6-microblaze.git / blobdiff