1 /* 2 * Copyright 2012 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 */ 23 #include "priv.h" 24 25 struct priv { 26 struct nvkm_bios *bios; 27 u32 bar0; 28 }; 29 30 static u32 31 pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) 32 { 33 u32 i; 34 if (offset + length <= 0x00100000) { 35 for (i = offset; i < offset + length; i += 4) 36 *(u32 *)&bios->data[i] = nv_rd32(bios, 0x700000 + i); 37 return length; 38 } 39 return 0; 40 } 41 42 static void 43 pramin_fini(void *data) 44 { 45 struct priv *priv = data; 46 if (priv) { 47 nv_wr32(priv->bios, 0x001700, priv->bar0); 48 kfree(priv); 49 } 50 } 51 52 static void * 53 pramin_init(struct nvkm_bios *bios, const char *name) 54 { 55 struct priv *priv = NULL; 56 u64 addr = 0; 57 58 /* PRAMIN always potentially available prior to nv50 */ 59 if (nv_device(bios)->card_type < NV_50) 60 return NULL; 61 62 /* we can't get the bios image pointer without PDISP */ 63 if (nv_device(bios)->card_type >= GM100) 64 addr = nv_rd32(bios, 0x021c04); 65 else 66 if (nv_device(bios)->card_type >= NV_C0) 67 addr = nv_rd32(bios, 0x022500); 68 if (addr & 0x00000001) { 69 nv_debug(bios, "... display disabled\n"); 70 return ERR_PTR(-ENODEV); 71 } 72 73 /* check that the window is enabled and in vram, particularly 74 * important as we don't want to be touching vram on an 75 * uninitialised board 76 */ 77 addr = nv_rd32(bios, 0x619f04); 78 if (!(addr & 0x00000008)) { 79 nv_debug(bios, "... not enabled\n"); 80 return ERR_PTR(-ENODEV); 81 } 82 if ( (addr & 0x00000003) != 1) { 83 nv_debug(bios, "... not in vram\n"); 84 return ERR_PTR(-ENODEV); 85 } 86 87 /* some alternate method inherited from xf86-video-nv... */ 88 addr = (addr & 0xffffff00) << 8; 89 if (!addr) { 90 addr = (u64)nv_rd32(bios, 0x001700) << 16; 91 addr += 0xf0000; 92 } 93 94 /* modify bar0 PRAMIN window to cover the bios image */ 95 if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) { 96 nv_error(bios, "... out of memory\n"); 97 return ERR_PTR(-ENOMEM); 98 } 99 100 priv->bios = bios; 101 priv->bar0 = nv_rd32(bios, 0x001700); 102 nv_wr32(bios, 0x001700, addr >> 16); 103 return priv; 104 } 105 106 const struct nvbios_source 107 nvbios_ramin = { 108 .name = "PRAMIN", 109 .init = pramin_init, 110 .fini = pramin_fini, 111 .read = pramin_read, 112 .rw = true, 113 }; 114