cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c

/*
 * Copyright 2015 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial busions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs <bskeggs@redhat.com>
 */

#define nv50_i2c_bus(p) container_of((p), struct nv50_i2c_bus, base)
#include "bus.h"

#include <subdev/vga.h>


struct nv50_i2c_bus {
	
struct nvkm_i2c_bus base;
	
u32 addr;
	
u32 data;
};


static void nv50_i2c_bus_drive_scl(struct nvkm_i2c_bus *base, int state) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; if (state) bus->data |= 0x01; else bus->data &= 0xfe; nvkm_wr32(device, bus->addr, bus->data); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs71100.00%1100.00%
Total71100.00%1100.00%


static void nv50_i2c_bus_drive_sda(struct nvkm_i2c_bus *base, int state) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; if (state) bus->data |= 0x02; else bus->data &= 0xfd; nvkm_wr32(device, bus->addr, bus->data); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs71100.00%1100.00%
Total71100.00%1100.00%


static int nv50_i2c_bus_sense_scl(struct nvkm_i2c_bus *base) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; return !!(nvkm_rd32(device, bus->addr) & 0x00000001); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs54100.00%1100.00%
Total54100.00%1100.00%


static int nv50_i2c_bus_sense_sda(struct nvkm_i2c_bus *base) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; return !!(nvkm_rd32(device, bus->addr) & 0x00000002); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs54100.00%1100.00%
Total54100.00%1100.00%


static void nv50_i2c_bus_init(struct nvkm_i2c_bus *base) { struct nv50_i2c_bus *bus = nv50_i2c_bus(base); struct nvkm_device *device = bus->base.pad->i2c->subdev.device; nvkm_wr32(device, bus->addr, (bus->data = 0x00000007)); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs55100.00%1100.00%
Total55100.00%1100.00%

static const struct nvkm_i2c_bus_func nv50_i2c_bus_func = { .init = nv50_i2c_bus_init, .drive_scl = nv50_i2c_bus_drive_scl, .drive_sda = nv50_i2c_bus_drive_sda, .sense_scl = nv50_i2c_bus_sense_scl, .sense_sda = nv50_i2c_bus_sense_sda, .xfer = nvkm_i2c_bit_xfer, };
int nv50_i2c_bus_new(struct nvkm_i2c_pad *pad, int id, u8 drive, struct nvkm_i2c_bus **pbus) { static const u32 addr[] = { 0x00e138, 0x00e150, 0x00e168, 0x00e180, 0x00e254, 0x00e274, 0x00e764, 0x00e780, 0x00e79c, 0x00e7b8 }; struct nv50_i2c_bus *bus; if (drive >= ARRAY_SIZE(addr)) { nvkm_warn(&pad->i2c->subdev, "bus %d unknown\n", drive); return -ENODEV; } if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL))) return -ENOMEM; *pbus = &bus->base; nvkm_i2c_bus_ctor(&nv50_i2c_bus_func, pad, id, &bus->base); bus->addr = addr[drive]; bus->data = 0x00000007; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs147100.00%1100.00%
Total147100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs519100.00%1100.00%
Total519100.00%1100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.