cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv50.c

/*
 * Copyright 2012 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 portions 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
 */
#include "priv.h"


void nv50_gpio_reset(struct nvkm_gpio *gpio, u8 match) { struct nvkm_device *device = gpio->subdev.device; struct nvkm_bios *bios = device->bios; u8 ver, len; u16 entry; int ent = -1; while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) { static const u32 regs[] = { 0xe100, 0xe28c }; u32 data = nvbios_rd32(bios, entry); u8 line = (data & 0x0000001f); u8 func = (data & 0x0000ff00) >> 8; u8 defs = !!(data & 0x01000000); u8 unk0 = !!(data & 0x02000000); u8 unk1 = !!(data & 0x04000000); u32 val = (unk1 << 16) | unk0; u32 reg = regs[line >> 4]; u32 lsh = line & 0x0f; if ( func == DCB_GPIO_UNUSED || (match != DCB_GPIO_UNUSED && match != func)) continue; nvkm_gpio_set(gpio, 0, func, line, defs); nvkm_mask(device, reg, 0x00010001 << lsh, val << lsh); } }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs219100.00%8100.00%
Total219100.00%8100.00%


static int nv50_gpio_location(int line, u32 *reg, u32 *shift) { const u32 nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 }; if (line >= 32) return -EINVAL; *reg = nv50_gpio_reg[line >> 3]; *shift = (line & 7) << 2; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs6697.06%360.00%
Roy Spliet11.47%120.00%
Dan Carpenter11.47%120.00%
Total68100.00%5100.00%


int nv50_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out) { struct nvkm_device *device = gpio->subdev.device; u32 reg, shift; if (nv50_gpio_location(line, &reg, &shift)) return -EINVAL; nvkm_mask(device, reg, 3 << shift, (((dir ^ 1) << 1) | out) << shift); return 0; }

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PersonTokensPropCommitsCommitProp
Ben Skeggs82100.00%6100.00%
Total82100.00%6100.00%


int nv50_gpio_sense(struct nvkm_gpio *gpio, int line) { struct nvkm_device *device = gpio->subdev.device; u32 reg, shift; if (nv50_gpio_location(line, &reg, &shift)) return -EINVAL; return !!(nvkm_rd32(device, reg) & (4 << shift)); }

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PersonTokensPropCommitsCommitProp
Ben Skeggs64100.00%5100.00%
Total64100.00%5100.00%


static void nv50_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo) { struct nvkm_device *device = gpio->subdev.device; u32 intr = nvkm_rd32(device, 0x00e054); u32 stat = nvkm_rd32(device, 0x00e050) & intr; *lo = (stat & 0xffff0000) >> 16; *hi = (stat & 0x0000ffff); nvkm_wr32(device, 0x00e054, intr); }

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PersonTokensPropCommitsCommitProp
Ben Skeggs81100.00%9100.00%
Total81100.00%9100.00%


static void nv50_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data) { struct nvkm_device *device = gpio->subdev.device; u32 inte = nvkm_rd32(device, 0x00e050); if (type & NVKM_GPIO_LO) inte = (inte & ~(mask << 16)) | (data << 16); if (type & NVKM_GPIO_HI) inte = (inte & ~mask) | data; nvkm_wr32(device, 0x00e050, inte); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs92100.00%4100.00%
Total92100.00%4100.00%

static const struct nvkm_gpio_func nv50_gpio = { .lines = 16, .intr_stat = nv50_gpio_intr_stat, .intr_mask = nv50_gpio_intr_mask, .drive = nv50_gpio_drive, .sense = nv50_gpio_sense, .reset = nv50_gpio_reset, };
int nv50_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio) { return nvkm_gpio_new_(&nv50_gpio, device, index, pgpio); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs32100.00%1100.00%
Total32100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs67899.71%1990.48%
Roy Spliet10.15%14.76%
Dan Carpenter10.15%14.76%
Total680100.00%21100.00%
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