1/*
2 * Copyright 2013 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * 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 OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24#include "ramnv40.h"
25
26#include <subdev/bios.h>
27#include <subdev/bios/bit.h>
28#include <subdev/bios/init.h>
29#include <subdev/bios/pll.h>
30#include <subdev/clk/pll.h>
31#include <subdev/timer.h>
32
33static int
34nv40_ram_calc(struct nvkm_ram *base, u32 freq)
35{
36	struct nv40_ram *ram = nv40_ram(base);
37	struct nvkm_subdev *subdev = &ram->base.fb->subdev;
38	struct nvkm_bios *bios = subdev->device->bios;
39	struct nvbios_pll pll;
40	int N1, M1, N2, M2;
41	int log2P, ret;
42
43	ret = nvbios_pll_parse(bios, 0x04, &pll);
44	if (ret) {
45		nvkm_error(subdev, "mclk pll data not found\n");
46		return ret;
47	}
48
49	ret = nv04_pll_calc(subdev, &pll, freq, &N1, &M1, &N2, &M2, &log2P);
50	if (ret < 0)
51		return ret;
52
53	ram->ctrl  = 0x80000000 | (log2P << 16);
54	ram->ctrl |= min(pll.bias_p + log2P, (int)pll.max_p) << 20;
55	if (N2 == M2) {
56		ram->ctrl |= 0x00000100;
57		ram->coef  = (N1 << 8) | M1;
58	} else {
59		ram->ctrl |= 0x40000000;
60		ram->coef  = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;
61	}
62
63	return 0;
64}
65
66static int
67nv40_ram_prog(struct nvkm_ram *base)
68{
69	struct nv40_ram *ram = nv40_ram(base);
70	struct nvkm_subdev *subdev = &ram->base.fb->subdev;
71	struct nvkm_device *device = subdev->device;
72	struct nvkm_bios *bios = device->bios;
73	struct bit_entry M;
74	u32 crtc_mask = 0;
75	u8  sr1[2];
76	int i;
77
78	/* determine which CRTCs are active, fetch VGA_SR1 for each */
79	for (i = 0; i < 2; i++) {
80		u32 vbl = nvkm_rd32(device, 0x600808 + (i * 0x2000));
81		u32 cnt = 0;
82		do {
83			if (vbl != nvkm_rd32(device, 0x600808 + (i * 0x2000))) {
84				nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
85				sr1[i] = nvkm_rd08(device, 0x0c03c5 + (i * 0x2000));
86				if (!(sr1[i] & 0x20))
87					crtc_mask |= (1 << i);
88				break;
89			}
90			udelay(1);
91		} while (cnt++ < 32);
92	}
93
94	/* wait for vblank start on active crtcs, disable memory access */
95	for (i = 0; i < 2; i++) {
96		if (!(crtc_mask & (1 << i)))
97			continue;
98
99		nvkm_msec(device, 2000,
100			u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
101			if (!(tmp & 0x00010000))
102				break;
103		);
104
105		nvkm_msec(device, 2000,
106			u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
107			if ( (tmp & 0x00010000))
108				break;
109		);
110
111		nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
112		nvkm_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i] | 0x20);
113	}
114
115	/* prepare ram for reclocking */
116	nvkm_wr32(device, 0x1002d4, 0x00000001); /* precharge */
117	nvkm_wr32(device, 0x1002d0, 0x00000001); /* refresh */
118	nvkm_wr32(device, 0x1002d0, 0x00000001); /* refresh */
119	nvkm_mask(device, 0x100210, 0x80000000, 0x00000000); /* no auto refresh */
120	nvkm_wr32(device, 0x1002dc, 0x00000001); /* enable self-refresh */
121
122	/* change the PLL of each memory partition */
123	nvkm_mask(device, 0x00c040, 0x0000c000, 0x00000000);
124	switch (device->chipset) {
125	case 0x40:
126	case 0x45:
127	case 0x41:
128	case 0x42:
129	case 0x47:
130		nvkm_mask(device, 0x004044, 0xc0771100, ram->ctrl);
131		nvkm_mask(device, 0x00402c, 0xc0771100, ram->ctrl);
132		nvkm_wr32(device, 0x004048, ram->coef);
133		nvkm_wr32(device, 0x004030, ram->coef);
134		fallthrough;
135	case 0x43:
136	case 0x49:
137	case 0x4b:
138		nvkm_mask(device, 0x004038, 0xc0771100, ram->ctrl);
139		nvkm_wr32(device, 0x00403c, ram->coef);
140		fallthrough;
141	default:
142		nvkm_mask(device, 0x004020, 0xc0771100, ram->ctrl);
143		nvkm_wr32(device, 0x004024, ram->coef);
144		break;
145	}
146	udelay(100);
147	nvkm_mask(device, 0x00c040, 0x0000c000, 0x0000c000);
148
149	/* re-enable normal operation of memory controller */
150	nvkm_wr32(device, 0x1002dc, 0x00000000);
151	nvkm_mask(device, 0x100210, 0x80000000, 0x80000000);
152	udelay(100);
153
154	/* execute memory reset script from vbios */
155	if (!bit_entry(bios, 'M', &M))
156		nvbios_init(subdev, nvbios_rd16(bios, M.offset + 0x00));
157
158	/* make sure we're in vblank (hopefully the same one as before), and
159	 * then re-enable crtc memory access
160	 */
161	for (i = 0; i < 2; i++) {
162		if (!(crtc_mask & (1 << i)))
163			continue;
164
165		nvkm_msec(device, 2000,
166			u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
167			if ( (tmp & 0x00010000))
168				break;
169		);
170
171		nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
172		nvkm_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i]);
173	}
174
175	return 0;
176}
177
178static void
179nv40_ram_tidy(struct nvkm_ram *base)
180{
181}
182
183static const struct nvkm_ram_func
184nv40_ram_func = {
185	.calc = nv40_ram_calc,
186	.prog = nv40_ram_prog,
187	.tidy = nv40_ram_tidy,
188};
189
190int
191nv40_ram_new_(struct nvkm_fb *fb, enum nvkm_ram_type type, u64 size,
192	      struct nvkm_ram **pram)
193{
194	struct nv40_ram *ram;
195	if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
196		return -ENOMEM;
197	*pram = &ram->base;
198	return nvkm_ram_ctor(&nv40_ram_func, fb, type, size, &ram->base);
199}
200
201int
202nv40_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
203{
204	struct nvkm_device *device = fb->subdev.device;
205	u32 pbus1218 = nvkm_rd32(device, 0x001218);
206	u32     size = nvkm_rd32(device, 0x10020c) & 0xff000000;
207	enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
208	int ret;
209
210	switch (pbus1218 & 0x00000300) {
211	case 0x00000000: type = NVKM_RAM_TYPE_SDRAM; break;
212	case 0x00000100: type = NVKM_RAM_TYPE_DDR1 ; break;
213	case 0x00000200: type = NVKM_RAM_TYPE_GDDR3; break;
214	case 0x00000300: type = NVKM_RAM_TYPE_DDR2 ; break;
215	}
216
217	ret = nv40_ram_new_(fb, type, size, pram);
218	if (ret)
219		return ret;
220
221	(*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
222	return 0;
223}
224