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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h
new file mode 100644
index 000000000..4c236ab34
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bus.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef __NVKM_I2C_BUS_H__
+#define __NVKM_I2C_BUS_H__
+#include "pad.h"
+
+struct nvkm_i2c_bus_func {
+ void (*init)(struct nvkm_i2c_bus *);
+ void (*drive_scl)(struct nvkm_i2c_bus *, int state);
+ void (*drive_sda)(struct nvkm_i2c_bus *, int state);
+ int (*sense_scl)(struct nvkm_i2c_bus *);
+ int (*sense_sda)(struct nvkm_i2c_bus *);
+ int (*xfer)(struct nvkm_i2c_bus *, struct i2c_msg *, int num);
+};
+
+int nvkm_i2c_bus_ctor(const struct nvkm_i2c_bus_func *, struct nvkm_i2c_pad *,
+ int id, struct nvkm_i2c_bus *);
+int nvkm_i2c_bus_new_(const struct nvkm_i2c_bus_func *, struct nvkm_i2c_pad *,
+ int id, struct nvkm_i2c_bus **);
+void nvkm_i2c_bus_del(struct nvkm_i2c_bus **);
+void nvkm_i2c_bus_init(struct nvkm_i2c_bus *);
+void nvkm_i2c_bus_fini(struct nvkm_i2c_bus *);
+
+int nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *, struct i2c_msg *, int);
+
+int nv04_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, u8,
+ struct nvkm_i2c_bus **);
+
+int nv4e_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
+int nv50_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
+int gf119_i2c_bus_new(struct nvkm_i2c_pad *, int, u8, struct nvkm_i2c_bus **);
+
+#define BUS_MSG(b,l,f,a...) do { \
+ struct nvkm_i2c_bus *_bus = (b); \
+ nvkm_##l(&_bus->pad->i2c->subdev, "bus %04x: "f"\n", _bus->id, ##a); \
+} while(0)
+#define BUS_ERR(b,f,a...) BUS_MSG((b), error, f, ##a)
+#define BUS_DBG(b,f,a...) BUS_MSG((b), debug, f, ##a)
+#define BUS_TRACE(b,f,a...) BUS_MSG((b), trace, f, ##a)
+#endif