1 /* $NetBSD: tegra_nouveau.c,v 1.2 2015/10/18 00:39:14 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "locators.h" 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: tegra_nouveau.c,v 1.2 2015/10/18 00:39:14 jmcneill Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/device.h> 37 #include <sys/intr.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 42 #include <arm/nvidia/tegra_reg.h> 43 #include <arm/nvidia/tegra_var.h> 44 45 #include <drm/drmP.h> 46 #include <engine/device.h> 47 48 extern char *nouveau_config; 49 extern char *nouveau_debug; 50 extern struct drm_driver *const nouveau_drm_driver; 51 52 static int tegra_nouveau_match(device_t, cfdata_t, void *); 53 static void tegra_nouveau_attach(device_t, device_t, void *); 54 55 struct tegra_nouveau_softc { 56 device_t sc_dev; 57 struct drm_device *sc_drm_dev; 58 struct platform_device sc_platform_dev; 59 struct nouveau_device *sc_nv_dev; 60 }; 61 62 static int tegra_nouveau_init(struct tegra_nouveau_softc *); 63 64 static int tegra_nouveau_get_irq(struct drm_device *); 65 static const char *tegra_nouveau_get_name(struct drm_device *); 66 static int tegra_nouveau_set_busid(struct drm_device *, 67 struct drm_master *); 68 static int tegra_nouveau_irq_install(struct drm_device *, 69 irqreturn_t (*)(void *), 70 int, const char *, void *, 71 struct drm_bus_irq_cookie **); 72 static void tegra_nouveau_irq_uninstall(struct drm_device *, 73 struct drm_bus_irq_cookie *); 74 75 static struct drm_bus drm_tegra_nouveau_bus = { 76 .bus_type = DRIVER_BUS_PLATFORM, 77 .get_irq = tegra_nouveau_get_irq, 78 .get_name = tegra_nouveau_get_name, 79 .set_busid = tegra_nouveau_set_busid, 80 .irq_install = tegra_nouveau_irq_install, 81 .irq_uninstall = tegra_nouveau_irq_uninstall 82 }; 83 84 CFATTACH_DECL_NEW(tegra_nouveau, sizeof(struct tegra_nouveau_softc), 85 tegra_nouveau_match, tegra_nouveau_attach, NULL, NULL); 86 87 static int 88 tegra_nouveau_match(device_t parent, cfdata_t cf, void *aux) 89 { 90 return 1; 91 } 92 93 static void 94 tegra_nouveau_attach(device_t parent, device_t self, void *aux) 95 { 96 struct tegra_nouveau_softc * const sc = device_private(self); 97 #if notyet 98 struct tegraio_attach_args * const tio = aux; 99 const struct tegra_locators * const loc = &tio->tio_loc; 100 #endif 101 int error; 102 103 sc->sc_dev = self; 104 #if notyet 105 sc->sc_bst = tio->tio_bst; 106 bus_space_subregion(tio->tio_bst, tio->tio_bsh, 107 loc->loc_offset, loc->loc_size, &sc->sc_bsh); 108 #endif 109 110 aprint_naive("\n"); 111 aprint_normal(": GPU\n"); 112 113 tegra_car_gpu_enable(); 114 115 error = -nouveau_device_create(&sc->sc_platform_dev, 116 NOUVEAU_BUS_PLATFORM, -1, device_xname(self), 117 nouveau_config, nouveau_debug, &sc->sc_nv_dev); 118 if (error) { 119 aprint_error_dev(self, "couldn't create nouveau device: %d\n", 120 error); 121 return; 122 } 123 124 error = tegra_nouveau_init(sc); 125 if (error) { 126 aprint_error_dev(self, "couldn't attach drm: %d\n", error); 127 return; 128 } 129 } 130 131 static int 132 tegra_nouveau_init(struct tegra_nouveau_softc *sc) 133 { 134 struct drm_driver * const driver = nouveau_drm_driver; 135 struct drm_device *dev; 136 bus_space_tag_t bst = &armv7_generic_bs_tag; 137 int error; 138 139 driver->kdriver.platform_device = &sc->sc_platform_dev; 140 driver->bus = &drm_tegra_nouveau_bus; 141 142 dev = drm_dev_alloc(driver, sc->sc_dev); 143 if (dev == NULL) 144 return ENOMEM; 145 dev->platformdev = &sc->sc_platform_dev; 146 147 dev->platformdev->id = -1; 148 dev->platformdev->nresource = 2; 149 dev->platformdev->resource[0].tag = bst; 150 dev->platformdev->resource[0].start = TEGRA_GPU_BASE; 151 dev->platformdev->resource[0].len = 0x01000000; 152 dev->platformdev->resource[1].tag = bst; 153 dev->platformdev->resource[1].start = TEGRA_GPU_BASE + 154 dev->platformdev->resource[0].len; 155 dev->platformdev->resource[1].len = 0x01000000; 156 157 error = -drm_dev_register(dev, 0); 158 if (error) { 159 drm_dev_unref(dev); 160 return error; 161 } 162 163 device_printf(sc->sc_dev, "initialized %s %d.%d.%d %s on minor %d\n", 164 driver->name, driver->major, driver->minor, driver->patchlevel, 165 driver->date, dev->primary->index); 166 167 return 0; 168 } 169 170 static int 171 tegra_nouveau_get_irq(struct drm_device *dev) 172 { 173 return TEGRA_INTR_GPU; 174 } 175 176 static const char *tegra_nouveau_get_name(struct drm_device *dev) 177 { 178 return "tegra_nouveau"; 179 } 180 181 static int 182 tegra_nouveau_set_busid(struct drm_device *dev, struct drm_master *master) 183 { 184 int id; 185 186 id = dev->platformdev->id; 187 if (id < 0) 188 id = 0; 189 190 master->unique = kmem_asprintf("platform:tegra_nouveau:%02d", id); 191 if (master->unique == NULL) 192 return -ENOMEM; 193 master->unique_len = strlen(master->unique); 194 195 return 0; 196 } 197 198 static int 199 tegra_nouveau_irq_install(struct drm_device *dev, 200 irqreturn_t (*handler)(void *), int flags, const char *name, void *arg, 201 struct drm_bus_irq_cookie **cookiep) 202 { 203 void *ih; 204 int irq = TEGRA_INTR_GPU; 205 206 ih = intr_establish(irq, IPL_DRM, IST_LEVEL, handler, arg); 207 if (ih == NULL) { 208 aprint_error_dev(dev->dev, 209 "couldn't establish interrupt (%s)\n", name); 210 return -ENOENT; 211 } 212 213 aprint_normal_dev(dev->dev, "interrupting on irq %d (%s)\n", 214 irq, name); 215 *cookiep = (struct drm_bus_irq_cookie *)ih; 216 return 0; 217 } 218 219 static void 220 tegra_nouveau_irq_uninstall(struct drm_device *dev, 221 struct drm_bus_irq_cookie *cookie) 222 { 223 intr_disestablish(cookie); 224 } 225