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 <linux/acpi_io.h> 26 #include "psb_drv.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 = dev->dev_private; 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 if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) { 168 int max = bd->props.max_brightness; 169 gma_backlight_set(dev, bclp * max / 255); 170 } 171 172 asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID; 173 174 return 0; 175 } 176 177 void psb_intel_opregion_asle_intr(struct drm_device *dev) 178 { 179 struct drm_psb_private *dev_priv = dev->dev_private; 180 struct opregion_asle *asle = dev_priv->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, asle->bclp); 195 196 asle->aslc = asle_stat; 197 } 198 199 #define ASLE_ALS_EN (1<<0) 200 #define ASLE_BLC_EN (1<<1) 201 #define ASLE_PFIT_EN (1<<2) 202 #define ASLE_PFMB_EN (1<<3) 203 204 void psb_intel_opregion_enable_asle(struct drm_device *dev) 205 { 206 struct drm_psb_private *dev_priv = dev->dev_private; 207 struct opregion_asle *asle = dev_priv->opregion.asle; 208 209 if (asle && system_opregion ) { 210 /* Don't do this on Medfield or other non PC like devices, they 211 use the bit for something different altogether */ 212 psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE); 213 psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE); 214 215 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN 216 | ASLE_PFMB_EN; 217 asle->ardy = 1; 218 } 219 } 220 221 #define ACPI_EV_DISPLAY_SWITCH (1<<0) 222 #define ACPI_EV_LID (1<<1) 223 #define ACPI_EV_DOCK (1<<2) 224 225 226 static int psb_intel_opregion_video_event(struct notifier_block *nb, 227 unsigned long val, void *data) 228 { 229 /* The only video events relevant to opregion are 0x80. These indicate 230 either a docking event, lid switch or display switch request. In 231 Linux, these are handled by the dock, button and video drivers. 232 We might want to fix the video driver to be opregion-aware in 233 future, but right now we just indicate to the firmware that the 234 request has been handled */ 235 236 struct opregion_acpi *acpi; 237 238 if (!system_opregion) 239 return NOTIFY_DONE; 240 241 acpi = system_opregion->acpi; 242 acpi->csts = 0; 243 244 return NOTIFY_OK; 245 } 246 247 static struct notifier_block psb_intel_opregion_notifier = { 248 .notifier_call = psb_intel_opregion_video_event, 249 }; 250 251 void psb_intel_opregion_init(struct drm_device *dev) 252 { 253 struct drm_psb_private *dev_priv = dev->dev_private; 254 struct psb_intel_opregion *opregion = &dev_priv->opregion; 255 256 if (!opregion->header) 257 return; 258 259 if (opregion->acpi) { 260 /* Notify BIOS we are ready to handle ACPI video ext notifs. 261 * Right now, all the events are handled by the ACPI video 262 * module. We don't actually need to do anything with them. */ 263 opregion->acpi->csts = 0; 264 opregion->acpi->drdy = 1; 265 266 system_opregion = opregion; 267 register_acpi_notifier(&psb_intel_opregion_notifier); 268 } 269 } 270 271 void psb_intel_opregion_fini(struct drm_device *dev) 272 { 273 struct drm_psb_private *dev_priv = dev->dev_private; 274 struct psb_intel_opregion *opregion = &dev_priv->opregion; 275 276 if (!opregion->header) 277 return; 278 279 if (opregion->acpi) { 280 opregion->acpi->drdy = 0; 281 282 system_opregion = NULL; 283 unregister_acpi_notifier(&psb_intel_opregion_notifier); 284 } 285 286 /* just clear all opregion memory pointers now */ 287 iounmap(opregion->header); 288 opregion->header = NULL; 289 opregion->acpi = NULL; 290 opregion->swsci = NULL; 291 opregion->asle = NULL; 292 opregion->vbt = NULL; 293 } 294 295 int psb_intel_opregion_setup(struct drm_device *dev) 296 { 297 struct drm_psb_private *dev_priv = dev->dev_private; 298 struct psb_intel_opregion *opregion = &dev_priv->opregion; 299 u32 opregion_phy, mboxes; 300 void __iomem *base; 301 int err = 0; 302 303 pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy); 304 if (opregion_phy == 0) { 305 DRM_DEBUG_DRIVER("ACPI Opregion not supported\n"); 306 return -ENOTSUPP; 307 } 308 DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy); 309 base = acpi_os_ioremap(opregion_phy, 8*1024); 310 if (!base) 311 return -ENOMEM; 312 313 if (memcmp(base, OPREGION_SIGNATURE, 16)) { 314 DRM_DEBUG_DRIVER("opregion signature mismatch\n"); 315 err = -EINVAL; 316 goto err_out; 317 } 318 319 opregion->header = base; 320 opregion->vbt = base + OPREGION_VBT_OFFSET; 321 322 opregion->lid_state = base + ACPI_CLID; 323 324 mboxes = opregion->header->mboxes; 325 if (mboxes & MBOX_ACPI) { 326 DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); 327 opregion->acpi = base + OPREGION_ACPI_OFFSET; 328 } 329 330 if (mboxes & MBOX_ASLE) { 331 DRM_DEBUG_DRIVER("ASLE supported\n"); 332 opregion->asle = base + OPREGION_ASLE_OFFSET; 333 } 334 335 return 0; 336 337 err_out: 338 iounmap(base); 339 return err; 340 } 341 342