Home | History | Annotate | Line # | Download | only in i2c 
      1 /*	$NetBSD: nouveau_nvkm_subdev_i2c_g94.c,v 1.4 2021/12/18 23:45:40 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_i2c_g94.c,v 1.4 2021/12/18 23:45:40 riastradh Exp $");
     28 
     29 #include "priv.h"
     30 #include "pad.h"
     31 
     32 void
     33 g94_aux_stat(struct nvkm_i2c *i2c, u32 *hi, u32 *lo, u32 *rq, u32 *tx)
     34 {
     35 	struct nvkm_device *device = i2c->subdev.device;
     36 	u32 intr = nvkm_rd32(device, 0x00e06c);
     37 	u32 stat = nvkm_rd32(device, 0x00e068) & intr, i;
     38 	for (i = 0, *hi = *lo = *rq = *tx = 0; i < 8; i++) {
     39 		if ((stat & (1 << (i * 4)))) *hi |= 1 << i;
     40 		if ((stat & (2 << (i * 4)))) *lo |= 1 << i;
     41 		if ((stat & (4 << (i * 4)))) *rq |= 1 << i;
     42 		if ((stat & (8U << (i * 4)))) *tx |= 1 << i;
     43 	}
     44 	nvkm_wr32(device, 0x00e06c, intr);
     45 }
     46 
     47 void
     48 g94_aux_mask(struct nvkm_i2c *i2c, u32 type, u32 mask, u32 data)
     49 {
     50 	struct nvkm_device *device = i2c->subdev.device;
     51 	u32 temp = nvkm_rd32(device, 0x00e068), i;
     52 	for (i = 0; i < 8; i++) {
     53 		if (mask & (1 << i)) {
     54 			if (!(data & (1 << i))) {
     55 				temp &= ~(type << (i * 4));
     56 				continue;
     57 			}
     58 			temp |= type << (i * 4);
     59 		}
     60 	}
     61 	nvkm_wr32(device, 0x00e068, temp);
     62 }
     63 
     64 static const struct nvkm_i2c_func
     65 g94_i2c = {
     66 	.pad_x_new = g94_i2c_pad_x_new,
     67 	.pad_s_new = g94_i2c_pad_s_new,
     68 	.aux = 4,
     69 	.aux_stat = g94_aux_stat,
     70 	.aux_mask = g94_aux_mask,
     71 };
     72 
     73 int
     74 g94_i2c_new(struct nvkm_device *device, int index, struct nvkm_i2c **pi2c)
     75 {
     76 	return nvkm_i2c_new_(&g94_i2c, device, index, pi2c);
     77 }
     78