via_pci.c revision 1.2
1/* $NetBSD: via_pci.c,v 1.2 2015/04/29 12:30:43 riastradh Exp $ */ 2 3/*- 4 * Copyright (c) 2015 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: via_pci.c,v 1.2 2015/04/29 12:30:43 riastradh Exp $"); 34 35#include <sys/types.h> 36#include <sys/device.h> 37#include <sys/pmf.h> 38#include <sys/systm.h> 39 40#include <linux/pci.h> 41 42#include <drm/drmP.h> 43#include <drm/drm_pciids.h> 44#include <drm/via_drm.h> 45 46#include "via_drv.h" 47 48struct viadrm_softc { 49 device_t sc_dev; 50 struct pci_dev sc_pci_dev; 51 struct drm_device *sc_drm_dev; 52}; 53 54static int viadrm_match(device_t, cfdata_t, void *); 55static void viadrm_attach(device_t, device_t, void *); 56static int viadrm_detach(device_t, int); 57 58extern struct drm_driver *const via_drm_driver; /* XXX */ 59 60CFATTACH_DECL_NEW(viadrmums, sizeof(struct viadrm_softc), 61 viadrm_match, viadrm_attach, viadrm_detach, NULL); 62 63static const struct pci_device_id viadrm_pci_ids[] = { 64 viadrv_PCI_IDS 65}; 66 67static const unsigned long * 68viadrm_lookup(const struct pci_attach_args *pa) 69{ 70 unsigned i; 71 72 for (i = 0; i < __arraycount(viadrm_pci_ids); i++) { 73 KASSERT(viadrm_pci_ids[i].subvendor == PCI_ANY_ID); 74 KASSERT(viadrm_pci_ids[i].subdevice == PCI_ANY_ID); 75 KASSERT(viadrm_pci_ids[i].class == 0); 76 KASSERT(viadrm_pci_ids[i].class_mask == 0); 77 if (PCI_VENDOR(pa->pa_id) != viadrm_pci_ids[i].vendor) 78 continue; 79 if (PCI_PRODUCT(pa->pa_id) != viadrm_pci_ids[i].device) 80 continue; 81 return &viadrm_pci_ids[i].driver_data; 82 } 83 84 return NULL; 85} 86 87static int 88viadrm_match(device_t parent, cfdata_t match, void *aux) 89{ 90 extern int viadrm_guarantee_initialized(void); 91 const struct pci_attach_args *const pa = aux; 92 int error; 93 94 error = viadrm_guarantee_initialized(); 95 if (error) { 96 aprint_error("viadrm: failed to initialize: %d\n", error); 97 return 0; 98 } 99 100 if (viadrm_lookup(pa) == NULL) 101 return 0; 102 103 return 1; 104} 105 106static void 107viadrm_attach(device_t parent, device_t self, void *aux) 108{ 109 struct viadrm_softc *const sc = device_private(self); 110 const struct pci_attach_args *const pa = aux; 111 const unsigned long *const cookiep = viadrm_lookup(pa); 112 int error; 113 114 KASSERT(cookiep != NULL); 115 116 if (!pmf_device_register(self, NULL, NULL)) 117 aprint_error_dev(self, "couldn't establish power handler\n"); 118 119 /* XXX errno Linux->NetBSD */ 120 error = -drm_pci_attach(self, pa, &sc->sc_pci_dev, via_drm_driver, 121 *cookiep, &sc->sc_drm_dev); 122 if (error) { 123 aprint_error_dev(self, "unable to attach drm: %d\n", error); 124 return; 125 } 126} 127 128static int 129viadrm_detach(device_t self, int flags) 130{ 131 struct viadrm_softc *const sc = device_private(self); 132 int error; 133 134 error = config_detach_children(self, flags); 135 if (error) 136 return error; 137 if (sc->sc_drm_dev == NULL) 138 goto out; 139 /* XXX errno Linux->NetBSD */ 140 error = -drm_pci_detach(sc->sc_drm_dev, flags); 141 if (error) 142 return error; 143 sc->sc_drm_dev = NULL; 144 pmf_device_deregister(self); 145out: return 0; 146} 147