1 /* 2 * Copyright 2011 Intel Corporation 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 (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 */ 24 #include <linux/acpi.h> 25 #include "psb_drv.h" 26 #include "psb_irq.h" 27 #include "psb_intel_reg.h" 28 29 #define PCI_ASLE 0xe4 30 #define PCI_ASLS 0xfc 31 32 #define OPREGION_HEADER_OFFSET 0 33 #define OPREGION_ACPI_OFFSET 0x100 34 #define ACPI_CLID 0x01ac /* current lid state indicator */ 35 #define ACPI_CDCK 0x01b0 /* current docking state indicator */ 36 #define OPREGION_SWSCI_OFFSET 0x200 37 #define OPREGION_ASLE_OFFSET 0x300 38 #define OPREGION_VBT_OFFSET 0x400 39 40 #define OPREGION_SIGNATURE "IntelGraphicsMem" 41 #define MBOX_ACPI (1<<0) 42 #define MBOX_SWSCI (1<<1) 43 #define MBOX_ASLE (1<<2) 44 45 struct opregion_header { 46 u8 signature[16]; 47 u32 size; 48 u32 opregion_ver; 49 u8 bios_ver[32]; 50 u8 vbios_ver[16]; 51 u8 driver_ver[16]; 52 u32 mboxes; 53 u8 reserved[164]; 54 } __packed; 55 56 /* OpRegion mailbox #1: public ACPI methods */ 57 struct opregion_acpi { 58 u32 drdy; /* driver readiness */ 59 u32 csts; /* notification status */ 60 u32 cevt; /* current event */ 61 u8 rsvd1[20]; 62 u32 didl[8]; /* supported display devices ID list */ 63 u32 cpdl[8]; /* currently presented display list */ 64 u32 cadl[8]; /* currently active display list */ 65 u32 nadl[8]; /* next active devices list */ 66 u32 aslp; /* ASL sleep time-out */ 67 u32 tidx; /* toggle table index */ 68 u32 chpd; /* current hotplug enable indicator */ 69 u32 clid; /* current lid state*/ 70 u32 cdck; /* current docking state */ 71 u32 sxsw; /* Sx state resume */ 72 u32 evts; /* ASL supported events */ 73 u32 cnot; /* current OS notification */ 74 u32 nrdy; /* driver status */ 75 u8 rsvd2[60]; 76 } __packed; 77 78 /* OpRegion mailbox #2: SWSCI */ 79 struct opregion_swsci { 80 /*FIXME: add it later*/ 81 } __packed; 82 83 /* OpRegion mailbox #3: ASLE */ 84 struct opregion_asle { 85 u32 ardy; /* driver readiness */ 86 u32 aslc; /* ASLE interrupt command */ 87 u32 tche; /* technology enabled indicator */ 88 u32 alsi; /* current ALS illuminance reading */ 89 u32 bclp; /* backlight brightness to set */ 90 u32 pfit; /* panel fitting state */ 91 u32 cblv; /* current brightness level */ 92 u16 bclm[20]; /* backlight level duty cycle mapping table */ 93 u32 cpfm; /* current panel fitting mode */ 94 u32 epfm; /* enabled panel fitting modes */ 95 u8 plut[74]; /* panel LUT and identifier */ 96 u32 pfmb; /* PWM freq and min brightness */ 97 u8 rsvd[102]; 98 } __packed; 99 100 /* ASLE irq request bits */ 101 #define ASLE_SET_ALS_ILLUM (1 << 0) 102 #define ASLE_SET_BACKLIGHT (1 << 1) 103 #define ASLE_SET_PFIT (1 << 2) 104 #define ASLE_SET_PWM_FREQ (1 << 3) 105 #define ASLE_REQ_MSK 0xf 106 107 /* response bits of ASLE irq request */ 108 #define ASLE_ALS_ILLUM_FAILED (1<<10) 109 #define ASLE_BACKLIGHT_FAILED (1<<12) 110 #define ASLE_PFIT_FAILED (1<<14) 111 #define ASLE_PWM_FREQ_FAILED (1<<16) 112 113 /* ASLE backlight brightness to set */ 114 #define ASLE_BCLP_VALID (1<<31) 115 #define ASLE_BCLP_MSK (~(1<<31)) 116 117 /* ASLE panel fitting request */ 118 #define ASLE_PFIT_VALID (1<<31) 119 #define ASLE_PFIT_CENTER (1<<0) 120 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 121 #define ASLE_PFIT_STRETCH_GFX (1<<2) 122 123 /* response bits of ASLE irq request */ 124 #define ASLE_ALS_ILLUM_FAILED (1<<10) 125 #define ASLE_BACKLIGHT_FAILED (1<<12) 126 #define ASLE_PFIT_FAILED (1<<14) 127 #define ASLE_PWM_FREQ_FAILED (1<<16) 128 129 /* ASLE backlight brightness to set */ 130 #define ASLE_BCLP_VALID (1<<31) 131 #define ASLE_BCLP_MSK (~(1<<31)) 132 133 /* ASLE panel fitting request */ 134 #define ASLE_PFIT_VALID (1<<31) 135 #define ASLE_PFIT_CENTER (1<<0) 136 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 137 #define ASLE_PFIT_STRETCH_GFX (1<<2) 138 139 /* PWM frequency and minimum brightness */ 140 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 141 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 142 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 143 #define ASLE_PFMB_PWM_VALID (1<<31) 144 145 #define ASLE_CBLV_VALID (1<<31) 146 147 static struct psb_intel_opregion *system_opregion; 148 149 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 150 { 151 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 152 struct opregion_asle *asle = dev_priv->opregion.asle; 153 struct backlight_device *bd = dev_priv->backlight_device; 154 155 DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp); 156 157 if (!(bclp & ASLE_BCLP_VALID)) 158 return ASLE_BACKLIGHT_FAILED; 159 160 if (bd == NULL) 161 return ASLE_BACKLIGHT_FAILED; 162 163 bclp &= ASLE_BCLP_MSK; 164 if (bclp > 255) 165 return ASLE_BACKLIGHT_FAILED; 166 167 gma_backlight_set(dev, bclp * bd->props.max_brightness / 255); 168 169 asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID; 170 171 return 0; 172 } 173 174 static void psb_intel_opregion_asle_work(struct work_struct *work) 175 { 176 struct psb_intel_opregion *opregion = 177 container_of(work, struct psb_intel_opregion, asle_work); 178 struct drm_psb_private *dev_priv = 179 container_of(opregion, struct drm_psb_private, opregion); 180 struct opregion_asle *asle = opregion->asle; 181 u32 asle_stat = 0; 182 u32 asle_req; 183 184 if (!asle) 185 return; 186 187 asle_req = asle->aslc & ASLE_REQ_MSK; 188 if (!asle_req) { 189 DRM_DEBUG_DRIVER("non asle set request??\n"); 190 return; 191 } 192 193 if (asle_req & ASLE_SET_BACKLIGHT) 194 asle_stat |= asle_set_backlight(&dev_priv->dev, asle->bclp); 195 196 asle->aslc = asle_stat; 197 198 } 199 200 void psb_intel_opregion_asle_intr(struct drm_device *dev) 201 { 202 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 203 204 if (dev_priv->opregion.asle) 205 schedule_work(&dev_priv->opregion.asle_work); 206 } 207 208 #define ASLE_ALS_EN (1<<0) 209 #define ASLE_BLC_EN (1<<1) 210 #define ASLE_PFIT_EN (1<<2) 211 #define ASLE_PFMB_EN (1<<3) 212 213 void psb_intel_opregion_enable_asle(struct drm_device *dev) 214 { 215 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 216 struct opregion_asle *asle = dev_priv->opregion.asle; 217 218 if (asle && system_opregion ) { 219 /* Don't do this on Medfield or other non PC like devices, they 220 use the bit for something different altogether */ 221 gma_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE); 222 gma_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE); 223 224 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN 225 | ASLE_PFMB_EN; 226 asle->ardy = 1; 227 } 228 } 229 230 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 231 #define ACPI_EV_LID (1<<1) 232 #define ACPI_EV_DOCK (1<<2) 233 234 235 static int psb_intel_opregion_video_event(struct notifier_block *nb, 236 unsigned long val, void *data) 237 { 238 /* The only video events relevant to opregion are 0x80. These indicate 239 either a docking event, lid switch or display switch request. In 240 Linux, these are handled by the dock, button and video drivers. 241 We might want to fix the video driver to be opregion-aware in 242 future, but right now we just indicate to the firmware that the 243 request has been handled */ 244 245 struct opregion_acpi *acpi; 246 247 if (!system_opregion) 248 return NOTIFY_DONE; 249 250 acpi = system_opregion->acpi; 251 acpi->csts = 0; 252 253 return NOTIFY_OK; 254 } 255 256 static struct notifier_block psb_intel_opregion_notifier = { 257 .notifier_call = psb_intel_opregion_video_event, 258 }; 259 260 void psb_intel_opregion_init(struct drm_device *dev) 261 { 262 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 263 struct psb_intel_opregion *opregion = &dev_priv->opregion; 264 265 if (!opregion->header) 266 return; 267 268 if (opregion->acpi) { 269 /* Notify BIOS we are ready to handle ACPI video ext notifs. 270 * Right now, all the events are handled by the ACPI video 271 * module. We don't actually need to do anything with them. */ 272 opregion->acpi->csts = 0; 273 opregion->acpi->drdy = 1; 274 275 system_opregion = opregion; 276 register_acpi_notifier(&psb_intel_opregion_notifier); 277 } 278 } 279 280 void psb_intel_opregion_fini(struct drm_device *dev) 281 { 282 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 283 struct psb_intel_opregion *opregion = &dev_priv->opregion; 284 285 if (!opregion->header) 286 return; 287 288 if (opregion->acpi) { 289 opregion->acpi->drdy = 0; 290 291 system_opregion = NULL; 292 unregister_acpi_notifier(&psb_intel_opregion_notifier); 293 } 294 295 cancel_work_sync(&opregion->asle_work); 296 297 /* just clear all opregion memory pointers now */ 298 iounmap(opregion->header); 299 opregion->header = NULL; 300 opregion->acpi = NULL; 301 opregion->swsci = NULL; 302 opregion->asle = NULL; 303 opregion->vbt = NULL; 304 } 305 306 int psb_intel_opregion_setup(struct drm_device *dev) 307 { 308 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 309 struct pci_dev *pdev = to_pci_dev(dev->dev); 310 struct psb_intel_opregion *opregion = &dev_priv->opregion; 311 u32 opregion_phy, mboxes; 312 void __iomem *base; 313 int err = 0; 314 315 pci_read_config_dword(pdev, PCI_ASLS, &opregion_phy); 316 if (opregion_phy == 0) { 317 DRM_DEBUG_DRIVER("ACPI Opregion not supported\n"); 318 return -ENOTSUPP; 319 } 320 321 INIT_WORK(&opregion->asle_work, psb_intel_opregion_asle_work); 322 323 DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy); 324 base = acpi_os_ioremap(opregion_phy, 8*1024); 325 if (!base) 326 return -ENOMEM; 327 328 if (memcmp(base, OPREGION_SIGNATURE, 16)) { 329 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 330 err = -EINVAL; 331 goto err_out; 332 } 333 334 opregion->header = base; 335 opregion->vbt = base + OPREGION_VBT_OFFSET; 336 337 opregion->lid_state = base + ACPI_CLID; 338 339 mboxes = opregion->header->mboxes; 340 if (mboxes & MBOX_ACPI) { 341 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 342 opregion->acpi = base + OPREGION_ACPI_OFFSET; 343 } 344 345 if (mboxes & MBOX_ASLE) { 346 DRM_DEBUG_DRIVER("ASLE supported\n"); 347 opregion->asle = base + OPREGION_ASLE_OFFSET; 348 } 349 350 return 0; 351 352 err_out: 353 iounmap(base); 354 return err; 355 } 356 357