136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
#ifndef __NVKM_I2C_H__
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#define __NVKM_I2C_H__
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#include <core/subdev.h>
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#include <core/event.h>
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#include <subdev/bios.h>
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#include <subdev/bios/i2c.h>
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#define NV_I2C_PORT(n) (0x00 + (n))
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#define NV_I2C_AUX(n) (0x10 + (n))
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#define NV_I2C_EXT(n) (0x20 + (n))
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#define NV_I2C_DEFAULT(n) (0x80 + (n))
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#define NV_I2C_TYPE_DCBI2C(n) (0x0000 | (n))
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#define NV_I2C_TYPE_EXTDDC(e) (0x0005 | (e) << 8)
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#define NV_I2C_TYPE_EXTAUX(e) (0x0006 | (e) << 8)
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struct nvkm_i2c_ntfy_req {
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#define NVKM_I2C_PLUG 0x01
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#define NVKM_I2C_UNPLUG 0x02
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#define NVKM_I2C_IRQ 0x04
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#define NVKM_I2C_DONE 0x08
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#define NVKM_I2C_ANY 0x0f
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u8 mask;
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u8 port;
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};
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struct nvkm_i2c_ntfy_rep {
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u8 mask;
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};
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struct nvkm_i2c_port {
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struct nvkm_object base;
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struct i2c_adapter adapter;
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struct mutex mutex;
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struct list_head head;
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u8 index;
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int aux;
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const struct nvkm_i2c_func *func;
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};
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struct nvkm_i2c_func {
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void (*drive_scl)(struct nvkm_i2c_port *, int);
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void (*drive_sda)(struct nvkm_i2c_port *, int);
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int (*sense_scl)(struct nvkm_i2c_port *);
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int (*sense_sda)(struct nvkm_i2c_port *);
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int (*aux)(struct nvkm_i2c_port *, bool, u8, u32, u8 *, u8);
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int (*pattern)(struct nvkm_i2c_port *, int pattern);
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int (*lnk_ctl)(struct nvkm_i2c_port *, int nr, int bw, bool enh);
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int (*drv_ctl)(struct nvkm_i2c_port *, int lane, int sw, int pe);
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};
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struct nvkm_i2c_board_info {
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struct i2c_board_info dev;
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u8 udelay; /* set to 0 to use the standard delay */
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};
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struct nvkm_i2c {
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struct nvkm_subdev base;
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struct nvkm_event event;
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struct nvkm_i2c_port *(*find)(struct nvkm_i2c *, u8 index);
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struct nvkm_i2c_port *(*find_type)(struct nvkm_i2c *, u16 type);
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int (*acquire_pad)(struct nvkm_i2c_port *, unsigned long timeout);
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void (*release_pad)(struct nvkm_i2c_port *);
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int (*acquire)(struct nvkm_i2c_port *, unsigned long timeout);
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void (*release)(struct nvkm_i2c_port *);
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int (*identify)(struct nvkm_i2c *, int index,
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const char *what, struct nvkm_i2c_board_info *,
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bool (*match)(struct nvkm_i2c_port *,
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struct i2c_board_info *, void *),
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void *);
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wait_queue_head_t wait;
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struct list_head ports;
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};
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static inline struct nvkm_i2c *
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nvkm_i2c(void *obj)
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{
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return (void *)nvkm_subdev(obj, NVDEV_SUBDEV_I2C);
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}
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extern struct nvkm_oclass *nv04_i2c_oclass;
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extern struct nvkm_oclass *nv4e_i2c_oclass;
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extern struct nvkm_oclass *nv50_i2c_oclass;
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extern struct nvkm_oclass *g94_i2c_oclass;
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extern struct nvkm_oclass *gf110_i2c_oclass;
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extern struct nvkm_oclass *gf117_i2c_oclass;
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extern struct nvkm_oclass *gk104_i2c_oclass;
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extern struct nvkm_oclass *gm204_i2c_oclass;
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static inline int
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nv_rdi2cr(struct nvkm_i2c_port *port, u8 addr, u8 reg)
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{
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u8 val;
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struct i2c_msg msgs[] = {
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{ .addr = addr, .flags = 0, .len = 1, .buf = ® },
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{ .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },
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};
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int ret = i2c_transfer(&port->adapter, msgs, 2);
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if (ret != 2)
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return -EIO;
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return val;
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}
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static inline int
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nv_wri2cr(struct nvkm_i2c_port *port, u8 addr, u8 reg, u8 val)
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{
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u8 buf[2] = { reg, val };
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struct i2c_msg msgs[] = {
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{ .addr = addr, .flags = 0, .len = 2, .buf = buf },
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};
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int ret = i2c_transfer(&port->adapter, msgs, 1);
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if (ret != 1)
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return -EIO;
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return 0;
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}
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static inline bool
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nv_probe_i2c(struct nvkm_i2c_port *port, u8 addr)
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{
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return nv_rdi2cr(port, addr, 0) >= 0;
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}
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int nv_rdaux(struct nvkm_i2c_port *, u32 addr, u8 *data, u8 size);
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int nv_wraux(struct nvkm_i2c_port *, u32 addr, u8 *data, u8 size);
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#endif
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