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Diffstat (limited to 'drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h')
-rw-r--r--drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h189
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h
new file mode 100644
index 000000000..146e13292
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h
@@ -0,0 +1,189 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef __NVKM_I2C_H__
+#define __NVKM_I2C_H__
+#include <core/subdev.h>
+#include <core/event.h>
+
+#include <subdev/bios.h>
+#include <subdev/bios/i2c.h>
+
+struct nvkm_i2c_ntfy_req {
+#define NVKM_I2C_PLUG 0x01
+#define NVKM_I2C_UNPLUG 0x02
+#define NVKM_I2C_IRQ 0x04
+#define NVKM_I2C_DONE 0x08
+#define NVKM_I2C_ANY 0x0f
+ u8 mask;
+ u8 port;
+};
+
+struct nvkm_i2c_ntfy_rep {
+ u8 mask;
+};
+
+struct nvkm_i2c_bus_probe {
+ struct i2c_board_info dev;
+ u8 udelay; /* set to 0 to use the standard delay */
+};
+
+struct nvkm_i2c_bus {
+ const struct nvkm_i2c_bus_func *func;
+ struct nvkm_i2c_pad *pad;
+#define NVKM_I2C_BUS_CCB(n) /* 'n' is ccb index */ (n)
+#define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100)
+#define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1
+#define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2
+ int id;
+
+ struct mutex mutex;
+ struct list_head head;
+ struct i2c_adapter i2c;
+ u8 enabled;
+};
+
+int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);
+void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);
+int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *,
+ struct nvkm_i2c_bus_probe *,
+ bool (*)(struct nvkm_i2c_bus *,
+ struct i2c_board_info *, void *), void *);
+
+struct nvkm_i2c_aux {
+ const struct nvkm_i2c_aux_func *func;
+ struct nvkm_i2c_pad *pad;
+#define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n)
+#define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100)
+ int id;
+
+ struct mutex mutex;
+ struct list_head head;
+ struct i2c_adapter i2c;
+ u8 enabled;
+
+ u32 intr;
+};
+
+void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);
+int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);
+void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);
+int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,
+ u32 addr, u8 *data, u8 *size);
+int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,
+ bool enhanced_framing);
+
+struct nvkm_i2c {
+ const struct nvkm_i2c_func *func;
+ struct nvkm_subdev subdev;
+
+ struct list_head pad;
+ struct list_head bus;
+ struct list_head aux;
+
+ struct nvkm_event event;
+};
+
+struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);
+struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);
+
+int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
+
+static inline int
+nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
+{
+ u8 val;
+ struct i2c_msg msgs[] = {
+ { .addr = addr, .flags = 0, .len = 1, .buf = &reg },
+ { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },
+ };
+
+ int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
+ if (ret != 2)
+ return -EIO;
+
+ return val;
+}
+
+static inline int
+nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
+{
+ u8 val[2];
+ struct i2c_msg msgs[] = {
+ { .addr = addr, .flags = 0, .len = 1, .buf = &reg },
+ { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val },
+ };
+
+ int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
+ if (ret != 2)
+ return -EIO;
+
+ return val[0] << 8 | val[1];
+}
+
+static inline int
+nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val)
+{
+ u8 buf[2] = { reg, val };
+ struct i2c_msg msgs[] = {
+ { .addr = addr, .flags = 0, .len = 2, .buf = buf },
+ };
+
+ int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
+ if (ret != 1)
+ return -EIO;
+
+ return 0;
+}
+
+static inline int
+nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val)
+{
+ u8 buf[3] = { reg, val >> 8, val & 0xff};
+ struct i2c_msg msgs[] = {
+ { .addr = addr, .flags = 0, .len = 3, .buf = buf },
+ };
+
+ int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
+ if (ret != 1)
+ return -EIO;
+
+ return 0;
+}
+
+static inline bool
+nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)
+{
+ return nvkm_rdi2cr(adap, addr, 0) >= 0;
+}
+
+static inline int
+nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
+{
+ const u8 xfer = size;
+ int ret = nvkm_i2c_aux_acquire(aux);
+ if (ret == 0) {
+ ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size);
+ WARN_ON(!ret && size != xfer);
+ nvkm_i2c_aux_release(aux);
+ }
+ return ret;
+}
+
+static inline int
+nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
+{
+ int ret = nvkm_i2c_aux_acquire(aux);
+ if (ret == 0) {
+ ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size);
+ nvkm_i2c_aux_release(aux);
+ }
+ return ret;
+}
+#endif