drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/i2c_.fuc

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/i2c_.fuc

File Facts

System: Linux kernel
Corpus path: drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/i2c_.fuc
Extension: .fuc
Size: 8147 bytes
Lines: 394
Domain: Driver Families
Bucket: drivers/gpu
Inferred role: Driver Families: drivers/gpu
Status: atlas-only

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#define T_TIMEOUT  2200000
#define T_RISEFALL 1000
#define T_HOLD     5000

#ifdef INCLUDE_PROC
process(PROC_I2C_, #i2c_init, #i2c_recv)
#endif

/******************************************************************************
 * I2C_ data segment
 *****************************************************************************/
#ifdef INCLUDE_DATA
i2c_scl_map:
.b32 NV_PPWR_OUTPUT_I2C_0_SCL
.b32 NV_PPWR_OUTPUT_I2C_1_SCL
.b32 NV_PPWR_OUTPUT_I2C_2_SCL
.b32 NV_PPWR_OUTPUT_I2C_3_SCL
.b32 NV_PPWR_OUTPUT_I2C_4_SCL
.b32 NV_PPWR_OUTPUT_I2C_5_SCL
.b32 NV_PPWR_OUTPUT_I2C_6_SCL
.b32 NV_PPWR_OUTPUT_I2C_7_SCL
.b32 NV_PPWR_OUTPUT_I2C_8_SCL
.b32 NV_PPWR_OUTPUT_I2C_9_SCL
i2c_sda_map:
.b32 NV_PPWR_OUTPUT_I2C_0_SDA
.b32 NV_PPWR_OUTPUT_I2C_1_SDA
.b32 NV_PPWR_OUTPUT_I2C_2_SDA
.b32 NV_PPWR_OUTPUT_I2C_3_SDA
.b32 NV_PPWR_OUTPUT_I2C_4_SDA
.b32 NV_PPWR_OUTPUT_I2C_5_SDA
.b32 NV_PPWR_OUTPUT_I2C_6_SDA
.b32 NV_PPWR_OUTPUT_I2C_7_SDA
.b32 NV_PPWR_OUTPUT_I2C_8_SDA
.b32 NV_PPWR_OUTPUT_I2C_9_SDA
#if NVKM_PPWR_CHIPSET < GF119
i2c_ctrl:
.b32 0x00e138
.b32 0x00e150
.b32 0x00e168
.b32 0x00e180
.b32 0x00e254
.b32 0x00e274
.b32 0x00e764
.b32 0x00e780
.b32 0x00e79c
.b32 0x00e7b8
#endif
#endif

/******************************************************************************
 * I2C_ code segment
 *****************************************************************************/
#ifdef INCLUDE_CODE

// $r3  - value
// $r2  - sda line
// $r1  - scl line
// $r0  - zero
i2c_drive_scl:
	cmp b32 $r3 0
	bra e #i2c_drive_scl_lo
	nv_iowr(NV_PPWR_OUTPUT_SET, $r1)
	ret
	i2c_drive_scl_lo:
	nv_iowr(NV_PPWR_OUTPUT_CLR, $r1)
	ret

i2c_drive_sda:
	cmp b32 $r3 0
	bra e #i2c_drive_sda_lo

Annotation

Atlas domain: Driver Families / drivers/gpu.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.