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 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 } 177 178 static void 179 nv40_ram_tidy(struct nvkm_ram *base) 180 { 181 } 182 183 static const struct nvkm_ram_func 184 nv40_ram_func = { 185 .calc = nv40_ram_calc, 186 .prog = nv40_ram_prog, 187 .tidy = nv40_ram_tidy, 188 }; 189 190 int 191 nv40_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 } 200 201 int 202 nv40_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