These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / fb / ramnv40.c
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
33 static int
34 nv40_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
66 static int
67 nv40_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         case 0x43:
135         case 0x49:
136         case 0x4b:
137                 nvkm_mask(device, 0x004038, 0xc0771100, ram->ctrl);
138                 nvkm_wr32(device, 0x00403c, ram->coef);
139         default:
140                 nvkm_mask(device, 0x004020, 0xc0771100, ram->ctrl);
141                 nvkm_wr32(device, 0x004024, ram->coef);
142                 break;
143         }
144         udelay(100);
145         nvkm_mask(device, 0x00c040, 0x0000c000, 0x0000c000);
146
147         /* re-enable normal operation of memory controller */
148         nvkm_wr32(device, 0x1002dc, 0x00000000);
149         nvkm_mask(device, 0x100210, 0x80000000, 0x80000000);
150         udelay(100);
151
152         /* execute memory reset script from vbios */
153         if (!bit_entry(bios, 'M', &M)) {
154                 struct nvbios_init init = {
155                         .subdev = subdev,
156                         .bios = bios,
157                         .offset = nvbios_rd16(bios, M.offset + 0x00),
158                         .execute = 1,
159                 };
160
161                 nvbios_exec(&init);
162         }
163
164         /* make sure we're in vblank (hopefully the same one as before), and
165          * then re-enable crtc memory access
166          */
167         for (i = 0; i < 2; i++) {
168                 if (!(crtc_mask & (1 << i)))
169                         continue;
170
171                 nvkm_msec(device, 2000,
172                         u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
173                         if ( (tmp & 0x00010000))
174                                 break;
175                 );
176
177                 nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
178                 nvkm_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i]);
179         }
180
181         return 0;
182 }
183
184 static void
185 nv40_ram_tidy(struct nvkm_ram *base)
186 {
187 }
188
189 static const struct nvkm_ram_func
190 nv40_ram_func = {
191         .calc = nv40_ram_calc,
192         .prog = nv40_ram_prog,
193         .tidy = nv40_ram_tidy,
194 };
195
196 int
197 nv40_ram_new_(struct nvkm_fb *fb, enum nvkm_ram_type type, u64 size,
198               u32 tags, struct nvkm_ram **pram)
199 {
200         struct nv40_ram *ram;
201         if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
202                 return -ENOMEM;
203         *pram = &ram->base;
204         return nvkm_ram_ctor(&nv40_ram_func, fb, type, size, tags, &ram->base);
205 }
206
207 int
208 nv40_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
209 {
210         struct nvkm_device *device = fb->subdev.device;
211         u32 pbus1218 = nvkm_rd32(device, 0x001218);
212         u32     size = nvkm_rd32(device, 0x10020c) & 0xff000000;
213         u32     tags = nvkm_rd32(device, 0x100320);
214         enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
215         int ret;
216
217         switch (pbus1218 & 0x00000300) {
218         case 0x00000000: type = NVKM_RAM_TYPE_SDRAM; break;
219         case 0x00000100: type = NVKM_RAM_TYPE_DDR1 ; break;
220         case 0x00000200: type = NVKM_RAM_TYPE_GDDR3; break;
221         case 0x00000300: type = NVKM_RAM_TYPE_DDR2 ; break;
222         }
223
224         ret = nv40_ram_new_(fb, type, size, tags, pram);
225         if (ret)
226                 return ret;
227
228         (*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
229         return 0;
230 }