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1/*2 * Copyright 2012 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 * Authors: Ben Skeggs23 */24#include "priv.h"25 26void27nv50_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 static const u32 regs[] = { 0xe100, 0xe28c };37 u32 data = nvbios_rd32(bios, entry);38 u8 line = (data & 0x0000001f);39 u8 func = (data & 0x0000ff00) >> 8;40 u8 defs = !!(data & 0x01000000);41 u8 unk0 = !!(data & 0x02000000);42 u8 unk1 = !!(data & 0x04000000);43 u32 val = (unk1 << 16) | unk0;44 u32 reg = regs[line >> 4];45 u32 lsh = line & 0x0f;46 47 if ( func == DCB_GPIO_UNUSED ||48 (match != DCB_GPIO_UNUSED && match != func))49 continue;50 51 nvkm_gpio_set(gpio, 0, func, line, defs);52 53 nvkm_mask(device, reg, 0x00010001 << lsh, val << lsh);54 }55}56 57static int58nv50_gpio_location(int line, u32 *reg, u32 *shift)59{60 const u32 nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };61 62 if (line >= 32)63 return -EINVAL;64 65 *reg = nv50_gpio_reg[line >> 3];66 *shift = (line & 7) << 2;67 return 0;68}69 70int71nv50_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)72{73 struct nvkm_device *device = gpio->subdev.device;74 u32 reg, shift;75 76 if (nv50_gpio_location(line, ®, &shift))77 return -EINVAL;78 79 nvkm_mask(device, reg, 3 << shift, (((dir ^ 1) << 1) | out) << shift);80 return 0;81}82 83int84nv50_gpio_sense(struct nvkm_gpio *gpio, int line)85{86 struct nvkm_device *device = gpio->subdev.device;87 u32 reg, shift;88 89 if (nv50_gpio_location(line, ®, &shift))90 return -EINVAL;91 92 return !!(nvkm_rd32(device, reg) & (4 << shift));93}94 95static void96nv50_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)97{98 struct nvkm_device *device = gpio->subdev.device;99 u32 intr = nvkm_rd32(device, 0x00e054);100 u32 stat = nvkm_rd32(device, 0x00e050) & intr;101 *lo = (stat & 0xffff0000) >> 16;102 *hi = (stat & 0x0000ffff);103 nvkm_wr32(device, 0x00e054, intr);104}105 106static void107nv50_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)108{109 struct nvkm_device *device = gpio->subdev.device;110 u32 inte = nvkm_rd32(device, 0x00e050);111 if (type & NVKM_GPIO_LO)112 inte = (inte & ~(mask << 16)) | (data << 16);113 if (type & NVKM_GPIO_HI)114 inte = (inte & ~mask) | data;115 nvkm_wr32(device, 0x00e050, inte);116}117 118static const struct nvkm_gpio_func119nv50_gpio = {120 .lines = 16,121 .intr_stat = nv50_gpio_intr_stat,122 .intr_mask = nv50_gpio_intr_mask,123 .drive = nv50_gpio_drive,124 .sense = nv50_gpio_sense,125 .reset = nv50_gpio_reset,126};127 128int129nv50_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,130 struct nvkm_gpio **pgpio)131{132 return nvkm_gpio_new_(&nv50_gpio, device, type, inst, pgpio);133}134