125 lines · c
1/*2 * Copyright 2021 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#include "priv.h"23 24#include <subdev/gsp.h>25 26static void27ga102_gpio_reset(struct nvkm_gpio *gpio, u8 match)28{29 struct nvkm_device *device = gpio->subdev.device;30 struct nvkm_bios *bios = device->bios;31 u8 ver, len;32 u16 entry;33 int ent = -1;34 35 while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {36 u32 data = nvbios_rd32(bios, entry);37 u8 line = (data & 0x0000003f);38 u8 defs = !!(data & 0x00000080);39 u8 func = (data & 0x0000ff00) >> 8;40 u8 unk0 = (data & 0x00ff0000) >> 16;41 u8 unk1 = (data & 0x1f000000) >> 24;42 43 if ( func == DCB_GPIO_UNUSED ||44 (match != DCB_GPIO_UNUSED && match != func))45 continue;46 47 nvkm_gpio_set(gpio, 0, func, line, defs);48 49 nvkm_mask(device, 0x021200 + (line * 4), 0xff, unk0);50 if (unk1--)51 nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);52 }53}54 55static int56ga102_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)57{58 struct nvkm_device *device = gpio->subdev.device;59 u32 data = ((dir ^ 1) << 13) | (out << 12);60 nvkm_mask(device, 0x021200 + (line * 4), 0x00003000, data);61 nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */62 return 0;63}64 65static int66ga102_gpio_sense(struct nvkm_gpio *gpio, int line)67{68 struct nvkm_device *device = gpio->subdev.device;69 return !!(nvkm_rd32(device, 0x021200 + (line * 4)) & 0x00004000);70}71 72static void73ga102_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)74{75 struct nvkm_device *device = gpio->subdev.device;76 u32 intr0 = nvkm_rd32(device, 0x021640);77 u32 intr1 = nvkm_rd32(device, 0x02164c);78 u32 stat0 = nvkm_rd32(device, 0x021648) & intr0;79 u32 stat1 = nvkm_rd32(device, 0x021654) & intr1;80 *lo = (stat1 & 0xffff0000) | (stat0 >> 16);81 *hi = (stat1 << 16) | (stat0 & 0x0000ffff);82 nvkm_wr32(device, 0x021640, intr0);83 nvkm_wr32(device, 0x02164c, intr1);84}85 86static void87ga102_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)88{89 struct nvkm_device *device = gpio->subdev.device;90 u32 inte0 = nvkm_rd32(device, 0x021648);91 u32 inte1 = nvkm_rd32(device, 0x021654);92 if (type & NVKM_GPIO_LO)93 inte0 = (inte0 & ~(mask << 16)) | (data << 16);94 if (type & NVKM_GPIO_HI)95 inte0 = (inte0 & ~(mask & 0xffff)) | (data & 0xffff);96 mask >>= 16;97 data >>= 16;98 if (type & NVKM_GPIO_LO)99 inte1 = (inte1 & ~(mask << 16)) | (data << 16);100 if (type & NVKM_GPIO_HI)101 inte1 = (inte1 & ~mask) | data;102 nvkm_wr32(device, 0x021648, inte0);103 nvkm_wr32(device, 0x021654, inte1);104}105 106static const struct nvkm_gpio_func107ga102_gpio = {108 .lines = 32,109 .intr_stat = ga102_gpio_intr_stat,110 .intr_mask = ga102_gpio_intr_mask,111 .drive = ga102_gpio_drive,112 .sense = ga102_gpio_sense,113 .reset = ga102_gpio_reset,114};115 116int117ga102_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,118 struct nvkm_gpio **pgpio)119{120 if (nvkm_gsp_rm(device->gsp))121 return -ENODEV;122 123 return nvkm_gpio_new_(&ga102_gpio, device, type, inst, pgpio);124}125