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      1 /*	$NetBSD: nouveau_nvkm_engine_disp_dacnv50.c,v 1.3 2021/12/18 23:45:35 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_engine_disp_dacnv50.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $");
     28 
     29 #include "ior.h"
     30 
     31 #include <subdev/timer.h>
     32 
     33 static void
     34 nv50_dac_clock(struct nvkm_ior *dac)
     35 {
     36 	struct nvkm_device *device = dac->disp->engine.subdev.device;
     37 	const u32 doff = nv50_ior_base(dac);
     38 	nvkm_mask(device, 0x614280 + doff, 0x07070707, 0x00000000);
     39 }
     40 
     41 int
     42 nv50_dac_sense(struct nvkm_ior *dac, u32 loadval)
     43 {
     44 	struct nvkm_device *device = dac->disp->engine.subdev.device;
     45 	const u32 doff = nv50_ior_base(dac);
     46 
     47 	dac->func->power(dac, false, true, false, false, false);
     48 
     49 	nvkm_wr32(device, 0x61a00c + doff, 0x00100000 | loadval);
     50 	mdelay(9);
     51 	udelay(500);
     52 	loadval = nvkm_mask(device, 0x61a00c + doff, 0xffffffff, 0x00000000);
     53 
     54 	dac->func->power(dac, false, false, false, false, false);
     55 	if (!(loadval & 0x80000000))
     56 		return -ETIMEDOUT;
     57 
     58 	return (loadval & 0x38000000) >> 27;
     59 }
     60 
     61 static void
     62 nv50_dac_power_wait(struct nvkm_device *device, const u32 doff)
     63 {
     64 	nvkm_msec(device, 2000,
     65 		if (!(nvkm_rd32(device, 0x61a004 + doff) & 0x80000000))
     66 			break;
     67 	);
     68 }
     69 
     70 void
     71 nv50_dac_power(struct nvkm_ior *dac, bool normal, bool pu,
     72 	       bool data, bool vsync, bool hsync)
     73 {
     74 	struct nvkm_device *device = dac->disp->engine.subdev.device;
     75 	const u32  doff = nv50_ior_base(dac);
     76 	const u32 shift = normal ? 0 : 16;
     77 	const u32 state = 0x80000000 | (0x00000040 * !    pu |
     78 					0x00000010 * !  data |
     79 					0x00000004 * ! vsync |
     80 					0x00000001 * ! hsync) << shift;
     81 	const u32 field = 0xc0000000 | (0x00000055 << shift);
     82 
     83 	nv50_dac_power_wait(device, doff);
     84 	nvkm_mask(device, 0x61a004 + doff, field, state);
     85 	nv50_dac_power_wait(device, doff);
     86 }
     87 
     88 static void
     89 nv50_dac_state(struct nvkm_ior *dac, struct nvkm_ior_state *state)
     90 {
     91 	struct nvkm_device *device = dac->disp->engine.subdev.device;
     92 	const u32 coff = dac->id * 8 + (state == &dac->arm) * 4;
     93 	u32 ctrl = nvkm_rd32(device, 0x610b58 + coff);
     94 
     95 	state->proto_evo = (ctrl & 0x00000f00) >> 8;
     96 	switch (state->proto_evo) {
     97 	case 0: state->proto = CRT; break;
     98 	default:
     99 		state->proto = UNKNOWN;
    100 		break;
    101 	}
    102 
    103 	state->head = ctrl & 0x00000003;
    104 }
    105 
    106 static const struct nvkm_ior_func
    107 nv50_dac = {
    108 	.state = nv50_dac_state,
    109 	.power = nv50_dac_power,
    110 	.sense = nv50_dac_sense,
    111 	.clock = nv50_dac_clock,
    112 };
    113 
    114 int
    115 nv50_dac_new(struct nvkm_disp *disp, int id)
    116 {
    117 	return nvkm_ior_new_(&nv50_dac, disp, DAC, id);
    118 }
    119 
    120 int
    121 nv50_dac_cnt(struct nvkm_disp *disp, unsigned long *pmask)
    122 {
    123 	struct nvkm_device *device = disp->engine.subdev.device;
    124 	*pmask = (nvkm_rd32(device, 0x610184) & 0x00700000) >> 20;
    125 	return 3;
    126 }
    127