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/pci.h> 26 27 #if defined(__powerpc__) 28 struct priv { 29 const void __iomem *data; 30 int size; 31 }; 32 33 static u32 34 of_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) 35 { 36 struct priv *priv = data; 37 if (offset < priv->size) { 38 length = min_t(u32, length, priv->size - offset); 39 memcpy_fromio(bios->data + offset, priv->data + offset, length); 40 return length; 41 } 42 return 0; 43 } 44 45 static u32 46 of_size(void *data) 47 { 48 struct priv *priv = data; 49 return priv->size; 50 } 51 52 static void * 53 of_init(struct nvkm_bios *bios, const char *name) 54 { 55 struct nvkm_device *device = bios->subdev.device; 56 struct pci_dev *pdev = device->func->pci(device)->pdev; 57 struct device_node *dn; 58 struct priv *priv; 59 if (!(dn = pci_device_to_OF_node(pdev))) 60 return ERR_PTR(-ENODEV); 61 if (!(priv = kzalloc(sizeof(*priv), GFP_KERNEL))) 62 return ERR_PTR(-ENOMEM); 63 if ((priv->data = of_get_property(dn, "NVDA,BMP", &priv->size))) 64 return priv; 65 kfree(priv); 66 return ERR_PTR(-EINVAL); 67 } 68 69 static void of_fini(void *p) 70 { 71 kfree(p); 72 } 73 74 const struct nvbios_source 75 nvbios_of = { 76 .name = "OpenFirmware", 77 .init = of_init, 78 .fini = of_fini, 79 .read = of_read, 80 .size = of_size, 81 .rw = false, 82 .ignore_checksum = true, 83 .no_pcir = true, 84 }; 85 #else 86 const struct nvbios_source 87 nvbios_of = { 88 }; 89 #endif 90