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 #include <core/device.h> 26 27 struct priv { 28 struct nvkm_bios *bios; 29 u32 bar0; 30 }; 31 32 static u32 33 pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) 34 { 35 u32 i; 36 if (offset + length <= 0x00100000) { 37 for (i = offset; i < offset + length; i += 4) 38 *(u32 *)&bios->data[i] = nv_rd32(bios, 0x700000 + i); 39 return length; 40 } 41 return 0; 42 } 43 44 static void 45 pramin_fini(void *data) 46 { 47 struct priv *priv = data; 48 if (priv) { 49 nv_wr32(priv->bios, 0x001700, priv->bar0); 50 kfree(priv); 51 } 52 } 53 54 static void * 55 pramin_init(struct nvkm_bios *bios, const char *name) 56 { 57 struct priv *priv = NULL; 58 u64 addr = 0; 59 60 /* PRAMIN always potentially available prior to nv50 */ 61 if (nv_device(bios)->card_type < NV_50) 62 return NULL; 63 64 /* we can't get the bios image pointer without PDISP */ 65 if (nv_device(bios)->card_type >= GM100) 66 addr = nv_rd32(bios, 0x021c04); 67 else 68 if (nv_device(bios)->card_type >= NV_C0) 69 addr = nv_rd32(bios, 0x022500); 70 if (addr & 0x00000001) { 71 nv_debug(bios, "... display disabled\n"); 72 return ERR_PTR(-ENODEV); 73 } 74 75 /* check that the window is enabled and in vram, particularly 76 * important as we don't want to be touching vram on an 77 * uninitialised board 78 */ 79 addr = nv_rd32(bios, 0x619f04); 80 if (!(addr & 0x00000008)) { 81 nv_debug(bios, "... not enabled\n"); 82 return ERR_PTR(-ENODEV); 83 } 84 if ( (addr & 0x00000003) != 1) { 85 nv_debug(bios, "... not in vram\n"); 86 return ERR_PTR(-ENODEV); 87 } 88 89 /* some alternate method inherited from xf86-video-nv... */ 90 addr = (addr & 0xffffff00) << 8; 91 if (!addr) { 92 addr = (u64)nv_rd32(bios, 0x001700) << 16; 93 addr += 0xf0000; 94 } 95 96 /* modify bar0 PRAMIN window to cover the bios image */ 97 if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) { 98 nv_error(bios, "... out of memory\n"); 99 return ERR_PTR(-ENOMEM); 100 } 101 102 priv->bios = bios; 103 priv->bar0 = nv_rd32(bios, 0x001700); 104 nv_wr32(bios, 0x001700, addr >> 16); 105 return priv; 106 } 107 108 const struct nvbios_source 109 nvbios_ramin = { 110 .name = "PRAMIN", 111 .init = pramin_init, 112 .fini = pramin_fini, 113 .read = pramin_read, 114 .rw = true, 115 }; 116