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_intel_reg.h" 27 28 #define PCI_ASLE 0xe4 29 #define PCI_ASLS 0xfc 30 31 #define OPREGION_HEADER_OFFSET 0 32 #define OPREGION_ACPI_OFFSET 0x100 33 #define ACPI_CLID 0x01ac /* current lid state indicator */ 34 #define ACPI_CDCK 0x01b0 /* current docking state indicator */ 35 #define OPREGION_SWSCI_OFFSET 0x200 36 #define OPREGION_ASLE_OFFSET 0x300 37 #define OPREGION_VBT_OFFSET 0x400 38 39 #define OPREGION_SIGNATURE "IntelGraphicsMem" 40 #define MBOX_ACPI (1<<0) 41 #define MBOX_SWSCI (1<<1) 42 #define MBOX_ASLE (1<<2) 43 44 struct opregion_header { 45 u8 signature[16]; 46 u32 size; 47 u32 opregion_ver; 48 u8 bios_ver[32]; 49 u8 vbios_ver[16]; 50 u8 driver_ver[16]; 51 u32 mboxes; 52 u8 reserved[164]; 53 } __packed; 54 55 /* OpRegion mailbox #1: public ACPI methods */ 56 struct opregion_acpi { 57 u32 drdy; /* driver readiness */ 58 u32 csts; /* notification status */ 59 u32 cevt; /* current event */ 60 u8 rsvd1[20]; 61 u32 didl[8]; /* supported display devices ID list */ 62 u32 cpdl[8]; /* currently presented display list */ 63 u32 cadl[8]; /* currently active display list */ 64 u32 nadl[8]; /* next active devices list */ 65 u32 aslp; /* ASL sleep time-out */ 66 u32 tidx; /* toggle table index */ 67 u32 chpd; /* current hotplug enable indicator */ 68 u32 clid; /* current lid state*/ 69 u32 cdck; /* current docking state */ 70 u32 sxsw; /* Sx state resume */ 71 u32 evts; /* ASL supported events */ 72 u32 cnot; /* current OS notification */ 73 u32 nrdy; /* driver status */ 74 u8 rsvd2[60]; 75 } __packed; 76 77 /* OpRegion mailbox #2: SWSCI */ 78 struct opregion_swsci { 79 /*FIXME: add it later*/ 80 } __packed; 81 82 /* OpRegion mailbox #3: ASLE */ 83 struct opregion_asle { 84 u32 ardy; /* driver readiness */ 85 u32 aslc; /* ASLE interrupt command */ 86 u32 tche; /* technology enabled indicator */ 87 u32 alsi; /* current ALS illuminance reading */ 88 u32 bclp; /* backlight brightness to set */ 89 u32 pfit; /* panel fitting state */ 90 u32 cblv; /* current brightness level */ 91 u16 bclm[20]; /* backlight level duty cycle mapping table */ 92 u32 cpfm; /* current panel fitting mode */ 93 u32 epfm; /* enabled panel fitting modes */ 94 u8 plut[74]; /* panel LUT and identifier */ 95 u32 pfmb; /* PWM freq and min brightness */ 96 u8 rsvd[102]; 97 } __packed; 98 99 /* ASLE irq request bits */ 100 #define ASLE_SET_ALS_ILLUM (1 << 0) 101 #define ASLE_SET_BACKLIGHT (1 << 1) 102 #define ASLE_SET_PFIT (1 << 2) 103 #define ASLE_SET_PWM_FREQ (1 << 3) 104 #define ASLE_REQ_MSK 0xf 105 106 /* response bits of ASLE irq request */ 107 #define ASLE_ALS_ILLUM_FAILED (1<<10) 108 #define ASLE_BACKLIGHT_FAILED (1<<12) 109 #define ASLE_PFIT_FAILED (1<<14) 110 #define ASLE_PWM_FREQ_FAILED (1<<16) 111 112 /* ASLE backlight brightness to set */ 113 #define ASLE_BCLP_VALID (1<<31) 114 #define ASLE_BCLP_MSK (~(1<<31)) 115 116 /* ASLE panel fitting request */ 117 #define ASLE_PFIT_VALID (1<<31) 118 #define ASLE_PFIT_CENTER (1<<0) 119 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 120 #define ASLE_PFIT_STRETCH_GFX (1<<2) 121 122 /* response bits of ASLE irq request */ 123 #define ASLE_ALS_ILLUM_FAILED (1<<10) 124 #define ASLE_BACKLIGHT_FAILED (1<<12) 125 #define ASLE_PFIT_FAILED (1<<14) 126 #define ASLE_PWM_FREQ_FAILED (1<<16) 127 128 /* ASLE backlight brightness to set */ 129 #define ASLE_BCLP_VALID (1<<31) 130 #define ASLE_BCLP_MSK (~(1<<31)) 131 132 /* ASLE panel fitting request */ 133 #define ASLE_PFIT_VALID (1<<31) 134 #define ASLE_PFIT_CENTER (1<<0) 135 #define ASLE_PFIT_STRETCH_TEXT (1<<1) 136 #define ASLE_PFIT_STRETCH_GFX (1<<2) 137 138 /* PWM frequency and minimum brightness */ 139 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) 140 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) 141 #define ASLE_PFMB_PWM_MASK (0x7ffffe00) 142 #define ASLE_PFMB_PWM_VALID (1<<31) 143 144 #define ASLE_CBLV_VALID (1<<31) 145 146 static struct psb_intel_opregion *system_opregion; 147 148 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) 149 { 150 struct drm_psb_private *dev_priv = dev->dev_private; 151 struct opregion_asle *asle = dev_priv->opregion.asle; 152 struct backlight_device *bd = dev_priv->backlight_device; 153 154 DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp); 155 156 if (!(bclp & ASLE_BCLP_VALID)) 157 return ASLE_BACKLIGHT_FAILED; 158 159 if (bd == NULL) 160 return ASLE_BACKLIGHT_FAILED; 161 162 bclp &= ASLE_BCLP_MSK; 163 if (bclp > 255) 164 return ASLE_BACKLIGHT_FAILED; 165 166 if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) { 167 int max = bd->props.max_brightness; 168 gma_backlight_set(dev, bclp * max / 255); 169 } 170 171 asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID; 172 173 return 0; 174 } 175 176 static void psb_intel_opregion_asle_work(struct work_struct *work) 177 { 178 struct psb_intel_opregion *opregion = 179 container_of(work, struct psb_intel_opregion, asle_work); 180 struct drm_psb_private *dev_priv = 181 container_of(opregion, struct drm_psb_private, opregion); 182 struct opregion_asle *asle = opregion->asle; 183 u32 asle_stat = 0; 184 u32 asle_req; 185 186 if (!asle) 187 return; 188 189 asle_req = asle->aslc & ASLE_REQ_MSK; 190 if (!asle_req) { 191 DRM_DEBUG_DRIVER("non asle set request??\n"); 192 return; 193 } 194 195 if (asle_req & ASLE_SET_BACKLIGHT) 196 asle_stat |= asle_set_backlight(dev_priv->dev, asle->bclp); 197 198 asle->aslc = asle_stat; 199 200 } 201 202 void psb_intel_opregion_asle_intr(struct drm_device *dev) 203 { 204 struct drm_psb_private *dev_priv = dev->dev_private; 205 206 if (dev_priv->opregion.asle) 207 schedule_work(&dev_priv->opregion.asle_work); 208 } 209 210 #define ASLE_ALS_EN (1<<0) 211 #define ASLE_BLC_EN (1<<1) 212 #define ASLE_PFIT_EN (1<<2) 213 #define ASLE_PFMB_EN (1<<3) 214 215 void psb_intel_opregion_enable_asle(struct drm_device *dev) 216 { 217 struct drm_psb_private *dev_priv = dev->dev_private; 218 struct opregion_asle *asle = dev_priv->opregion.asle; 219 220 if (asle && system_opregion ) { 221 /* Don't do this on Medfield or other non PC like devices, they 222 use the bit for something different altogether */ 223 psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE); 224 psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE); 225 226 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN 227 | ASLE_PFMB_EN; 228 asle->ardy = 1; 229 } 230 } 231 232 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 233 #define ACPI_EV_LID (1<<1) 234 #define ACPI_EV_DOCK (1<<2) 235 236 237 static int psb_intel_opregion_video_event(struct notifier_block *nb, 238 unsigned long val, void *data) 239 { 240 /* The only video events relevant to opregion are 0x80. These indicate 241 either a docking event, lid switch or display switch request. In 242 Linux, these are handled by the dock, button and video drivers. 243 We might want to fix the video driver to be opregion-aware in 244 future, but right now we just indicate to the firmware that the 245 request has been handled */ 246 247 struct opregion_acpi *acpi; 248 249 if (!system_opregion) 250 return NOTIFY_DONE; 251 252 acpi = system_opregion->acpi; 253 acpi->csts = 0; 254 255 return NOTIFY_OK; 256 } 257 258 static struct notifier_block psb_intel_opregion_notifier = { 259 .notifier_call = psb_intel_opregion_video_event, 260 }; 261 262 void psb_intel_opregion_init(struct drm_device *dev) 263 { 264 struct drm_psb_private *dev_priv = dev->dev_private; 265 struct psb_intel_opregion *opregion = &dev_priv->opregion; 266 267 if (!opregion->header) 268 return; 269 270 if (opregion->acpi) { 271 /* Notify BIOS we are ready to handle ACPI video ext notifs. 272 * Right now, all the events are handled by the ACPI video 273 * module. We don't actually need to do anything with them. */ 274 opregion->acpi->csts = 0; 275 opregion->acpi->drdy = 1; 276 277 system_opregion = opregion; 278 register_acpi_notifier(&psb_intel_opregion_notifier); 279 } 280 } 281 282 void psb_intel_opregion_fini(struct drm_device *dev) 283 { 284 struct drm_psb_private *dev_priv = dev->dev_private; 285 struct psb_intel_opregion *opregion = &dev_priv->opregion; 286 287 if (!opregion->header) 288 return; 289 290 if (opregion->acpi) { 291 opregion->acpi->drdy = 0; 292 293 system_opregion = NULL; 294 unregister_acpi_notifier(&psb_intel_opregion_notifier); 295 } 296 297 cancel_work_sync(&opregion->asle_work); 298 299 /* just clear all opregion memory pointers now */ 300 iounmap(opregion->header); 301 opregion->header = NULL; 302 opregion->acpi = NULL; 303 opregion->swsci = NULL; 304 opregion->asle = NULL; 305 opregion->vbt = NULL; 306 } 307 308 int psb_intel_opregion_setup(struct drm_device *dev) 309 { 310 struct drm_psb_private *dev_priv = dev->dev_private; 311 struct psb_intel_opregion *opregion = &dev_priv->opregion; 312 u32 opregion_phy, mboxes; 313 void __iomem *base; 314 int err = 0; 315 316 pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy); 317 if (opregion_phy == 0) { 318 DRM_DEBUG_DRIVER("ACPI Opregion not supported\n"); 319 return -ENOTSUPP; 320 } 321 322 INIT_WORK(&opregion->asle_work, psb_intel_opregion_asle_work); 323 324 DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy); 325 base = acpi_os_ioremap(opregion_phy, 8*1024); 326 if (!base) 327 return -ENOMEM; 328 329 if (memcmp(base, OPREGION_SIGNATURE, 16)) { 330 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 331 err = -EINVAL; 332 goto err_out; 333 } 334 335 opregion->header = base; 336 opregion->vbt = base + OPREGION_VBT_OFFSET; 337 338 opregion->lid_state = base + ACPI_CLID; 339 340 mboxes = opregion->header->mboxes; 341 if (mboxes & MBOX_ACPI) { 342 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 343 opregion->acpi = base + OPREGION_ACPI_OFFSET; 344 } 345 346 if (mboxes & MBOX_ASLE) { 347 DRM_DEBUG_DRIVER("ASLE supported\n"); 348 opregion->asle = base + OPREGION_ASLE_OFFSET; 349 } 350 351 return 0; 352 353 err_out: 354 iounmap(base); 355 return err; 356 } 357 358