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      1 /*	$NetBSD: nouveau_nvkm_subdev_gpio_gf119.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_gpio_gf119.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
     28 
     29 #include "priv.h"
     30 
     31 void
     32 gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
     33 {
     34 	struct nvkm_device *device = gpio->subdev.device;
     35 	struct nvkm_bios *bios = device->bios;
     36 	u8 ver, len;
     37 	u16 entry;
     38 	int ent = -1;
     39 
     40 	while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
     41 		u32 data = nvbios_rd32(bios, entry);
     42 		u8  line =   (data & 0x0000003f);
     43 		u8  defs = !!(data & 0x00000080);
     44 		u8  func =   (data & 0x0000ff00) >> 8;
     45 		u8  unk0 =   (data & 0x00ff0000) >> 16;
     46 		u8  unk1 =   (data & 0x1f000000) >> 24;
     47 
     48 		if ( func  == DCB_GPIO_UNUSED ||
     49 		    (match != DCB_GPIO_UNUSED && match != func))
     50 			continue;
     51 
     52 		nvkm_gpio_set(gpio, 0, func, line, defs);
     53 
     54 		nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
     55 		if (unk1--)
     56 			nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
     57 	}
     58 }
     59 
     60 int
     61 gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
     62 {
     63 	struct nvkm_device *device = gpio->subdev.device;
     64 	u32 data = ((dir ^ 1) << 13) | (out << 12);
     65 	nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
     66 	nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
     67 	return 0;
     68 }
     69 
     70 int
     71 gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
     72 {
     73 	struct nvkm_device *device = gpio->subdev.device;
     74 	return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
     75 }
     76 
     77 static const struct nvkm_gpio_func
     78 gf119_gpio = {
     79 	.lines = 32,
     80 	.intr_stat = g94_gpio_intr_stat,
     81 	.intr_mask = g94_gpio_intr_mask,
     82 	.drive = gf119_gpio_drive,
     83 	.sense = gf119_gpio_sense,
     84 	.reset = gf119_gpio_reset,
     85 };
     86 
     87 int
     88 gf119_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
     89 {
     90 	return nvkm_gpio_new_(&gf119_gpio, device, index, pgpio);
     91 }
     92