drivers/gpu/drm/gma500/cdv_device.c

   1 /**************************************************************************
   2  * Copyright (c) 2011, Intel Corporation.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  **************************************************************************/
  19
  20 #include <linux/backlight.h>
  21 #include <drm/drmP.h>
  22 #include <drm/drm.h>
  23 #include "gma_drm.h"
  24 #include "psb_drv.h"
  25 #include "psb_reg.h"
  26 #include "psb_intel_reg.h"
  27 #include "intel_bios.h"
  28 #include "cdv_device.h"
  29
  30 #define VGA_SR_INDEX            0x3c4
  31 #define VGA_SR_DATA             0x3c5
  32
  33 static void cdv_disable_vga(struct drm_device *dev)
  34 {
  35         u8 sr1;
  36         u32 vga_reg;
  37
  38         vga_reg = VGACNTRL;
  39
  40         outb(1, VGA_SR_INDEX);
  41         sr1 = inb(VGA_SR_DATA);
  42         outb(sr1 | 1<<5, VGA_SR_DATA);
  43         udelay(300);
  44
  45         REG_WRITE(vga_reg, VGA_DISP_DISABLE);
  46         REG_READ(vga_reg);
  47 }
  48
  49 static int cdv_output_init(struct drm_device *dev)
  50 {
  51         struct drm_psb_private *dev_priv = dev->dev_private;
  52         cdv_disable_vga(dev);
  53
  54         cdv_intel_crt_init(dev, &dev_priv->mode_dev);
  55         cdv_intel_lvds_init(dev, &dev_priv->mode_dev);
  56
  57         /* These bits indicate HDMI not SDVO on CDV, but we don't yet support
  58            the HDMI interface */
  59         if (REG_READ(SDVOB) & SDVO_DETECTED)
  60                 cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOB);
  61         if (REG_READ(SDVOC) & SDVO_DETECTED)
  62                 cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOC);
  63         return 0;
  64 }
  65
  66 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
  67
  68 /*
  69  *      Poulsbo Backlight Interfaces
  70  */
  71
  72 #define BLC_PWM_PRECISION_FACTOR 100    /* 10000000 */
  73 #define BLC_PWM_FREQ_CALC_CONSTANT 32
  74 #define MHz 1000000
  75
  76 #define PSB_BLC_PWM_PRECISION_FACTOR    10
  77 #define PSB_BLC_MAX_PWM_REG_FREQ        0xFFFE
  78 #define PSB_BLC_MIN_PWM_REG_FREQ        0x2
  79
  80 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
  81 #define PSB_BACKLIGHT_PWM_CTL_SHIFT     (16)
  82
  83 static int cdv_brightness;
  84 static struct backlight_device *cdv_backlight_device;
  85
  86 static int cdv_get_brightness(struct backlight_device *bd)
  87 {
  88         /* return locally cached var instead of HW read (due to DPST etc.) */
  89         /* FIXME: ideally return actual value in case firmware fiddled with
  90            it */
  91         return cdv_brightness;
  92 }
  93
  94
  95 static int cdv_backlight_setup(struct drm_device *dev)
  96 {
  97         struct drm_psb_private *dev_priv = dev->dev_private;
  98         unsigned long core_clock;
  99         /* u32 bl_max_freq; */
 100         /* unsigned long value; */
 101         u16 bl_max_freq;
 102         uint32_t value;
 103         uint32_t blc_pwm_precision_factor;
 104
 105         /* get bl_max_freq and pol from dev_priv*/
 106         if (!dev_priv->lvds_bl) {
 107                 dev_err(dev->dev, "Has no valid LVDS backlight info\n");
 108                 return -ENOENT;
 109         }
 110         bl_max_freq = dev_priv->lvds_bl->freq;
 111         blc_pwm_precision_factor = PSB_BLC_PWM_PRECISION_FACTOR;
 112
 113         core_clock = dev_priv->core_freq;
 114
 115         value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT;
 116         value *= blc_pwm_precision_factor;
 117         value /= bl_max_freq;
 118         value /= blc_pwm_precision_factor;
 119
 120         if (value > (unsigned long long)PSB_BLC_MAX_PWM_REG_FREQ ||
 121                  value < (unsigned long long)PSB_BLC_MIN_PWM_REG_FREQ)
 122                                 return -ERANGE;
 123         else {
 124                 /* FIXME */
 125         }
 126         return 0;
 127 }
 128
 129 static int cdv_set_brightness(struct backlight_device *bd)
 130 {
 131         int level = bd->props.brightness;
 132
 133         /* Percentage 1-100% being valid */
 134         if (level < 1)
 135                 level = 1;
 136
 137         /*cdv_intel_lvds_set_brightness(dev, level); FIXME */
 138         cdv_brightness = level;
 139         return 0;
 140 }
 141
 142 static const struct backlight_ops cdv_ops = {
 143         .get_brightness = cdv_get_brightness,
 144         .update_status  = cdv_set_brightness,
 145 };
 146
 147 static int cdv_backlight_init(struct drm_device *dev)
 148 {
 149         struct drm_psb_private *dev_priv = dev->dev_private;
 150         int ret;
 151         struct backlight_properties props;
 152
 153         memset(&props, 0, sizeof(struct backlight_properties));
 154         props.max_brightness = 100;
 155         props.type = BACKLIGHT_PLATFORM;
 156
 157         cdv_backlight_device = backlight_device_register("psb-bl",
 158                                         NULL, (void *)dev, &cdv_ops, &props);
 159         if (IS_ERR(cdv_backlight_device))
 160                 return PTR_ERR(cdv_backlight_device);
 161
 162         ret = cdv_backlight_setup(dev);
 163         if (ret < 0) {
 164                 backlight_device_unregister(cdv_backlight_device);
 165                 cdv_backlight_device = NULL;
 166                 return ret;
 167         }
 168         cdv_backlight_device->props.brightness = 100;
 169         cdv_backlight_device->props.max_brightness = 100;
 170         backlight_update_status(cdv_backlight_device);
 171         dev_priv->backlight_device = cdv_backlight_device;
 172         return 0;
 173 }
 174
 175 #endif
 176
 177 /*
 178  *      Provide the Cedarview specific chip logic and low level methods
 179  *      for power management
 180  *
 181  *      FIXME: we need to implement the apm/ospm base management bits
 182  *      for this and the MID devices.
 183  */
 184
 185 static inline u32 CDV_MSG_READ32(uint port, uint offset)
 186 {
 187         int mcr = (0x10<<24) | (port << 16) | (offset << 8);
 188         uint32_t ret_val = 0;
 189         struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
 190         pci_write_config_dword(pci_root, 0xD0, mcr);
 191         pci_read_config_dword(pci_root, 0xD4, &ret_val);
 192         pci_dev_put(pci_root);
 193         return ret_val;
 194 }
 195
 196 static inline void CDV_MSG_WRITE32(uint port, uint offset, u32 value)
 197 {
 198         int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
 199         struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
 200         pci_write_config_dword(pci_root, 0xD4, value);
 201         pci_write_config_dword(pci_root, 0xD0, mcr);
 202         pci_dev_put(pci_root);
 203 }
 204
 205 #define PSB_PM_SSC                      0x20
 206 #define PSB_PM_SSS                      0x30
 207 #define PSB_PWRGT_GFX_ON                0x02
 208 #define PSB_PWRGT_GFX_OFF               0x01
 209 #define PSB_PWRGT_GFX_D0                0x00
 210 #define PSB_PWRGT_GFX_D3                0x03
 211
 212 static void cdv_init_pm(struct drm_device *dev)
 213 {
 214         struct drm_psb_private *dev_priv = dev->dev_private;
 215         u32 pwr_cnt;
 216         int i;
 217
 218         dev_priv->apm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
 219                                                         PSB_APMBA) & 0xFFFF;
 220         dev_priv->ospm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
 221                                                         PSB_OSPMBA) & 0xFFFF;
 222
 223         /* Power status */
 224         pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
 225
 226         /* Enable the GPU */
 227         pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
 228         pwr_cnt |= PSB_PWRGT_GFX_ON;
 229         outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
 230
 231         /* Wait for the GPU power */
 232         for (i = 0; i < 5; i++) {
 233                 u32 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
 234                 if ((pwr_sts & PSB_PWRGT_GFX_MASK) == 0)
 235                         return;
 236                 udelay(10);
 237         }
 238         dev_err(dev->dev, "GPU: power management timed out.\n");
 239 }
 240
 241 /**
 242  *      cdv_save_display_registers      -       save registers lost on suspend
 243  *      @dev: our DRM device
 244  *
 245  *      Save the state we need in order to be able to restore the interface
 246  *      upon resume from suspend
 247  */
 248 static int cdv_save_display_registers(struct drm_device *dev)
 249 {
 250         struct drm_psb_private *dev_priv = dev->dev_private;
 251         struct psb_save_area *regs = &dev_priv->regs;
 252         struct drm_connector *connector;
 253
 254         dev_info(dev->dev, "Saving GPU registers.\n");
 255
 256         pci_read_config_byte(dev->pdev, 0xF4, &regs->cdv.saveLBB);
 257
 258         regs->cdv.saveDSPCLK_GATE_D = REG_READ(DSPCLK_GATE_D);
 259         regs->cdv.saveRAMCLK_GATE_D = REG_READ(RAMCLK_GATE_D);
 260
 261         regs->cdv.saveDSPARB = REG_READ(DSPARB);
 262         regs->cdv.saveDSPFW[0] = REG_READ(DSPFW1);
 263         regs->cdv.saveDSPFW[1] = REG_READ(DSPFW2);
 264         regs->cdv.saveDSPFW[2] = REG_READ(DSPFW3);
 265         regs->cdv.saveDSPFW[3] = REG_READ(DSPFW4);
 266         regs->cdv.saveDSPFW[4] = REG_READ(DSPFW5);
 267         regs->cdv.saveDSPFW[5] = REG_READ(DSPFW6);
 268
 269         regs->cdv.saveADPA = REG_READ(ADPA);
 270
 271         regs->cdv.savePP_CONTROL = REG_READ(PP_CONTROL);
 272         regs->cdv.savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
 273         regs->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
 274         regs->saveBLC_PWM_CTL2 = REG_READ(BLC_PWM_CTL2);
 275         regs->cdv.saveLVDS = REG_READ(LVDS);
 276
 277         regs->cdv.savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
 278
 279         regs->cdv.savePP_ON_DELAYS = REG_READ(PP_ON_DELAYS);
 280         regs->cdv.savePP_OFF_DELAYS = REG_READ(PP_OFF_DELAYS);
 281         regs->cdv.savePP_CYCLE = REG_READ(PP_CYCLE);
 282
 283         regs->cdv.saveVGACNTRL = REG_READ(VGACNTRL);
 284
 285         regs->cdv.saveIER = REG_READ(PSB_INT_ENABLE_R);
 286         regs->cdv.saveIMR = REG_READ(PSB_INT_MASK_R);
 287
 288         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 289                 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 290
 291         return 0;
 292 }
 293
 294 /**
 295  *      cdv_restore_display_registers   -       restore lost register state
 296  *      @dev: our DRM device
 297  *
 298  *      Restore register state that was lost during suspend and resume.
 299  *
 300  *      FIXME: review
 301  */
 302 static int cdv_restore_display_registers(struct drm_device *dev)
 303 {
 304         struct drm_psb_private *dev_priv = dev->dev_private;
 305         struct psb_save_area *regs = &dev_priv->regs;
 306         struct drm_connector *connector;
 307         u32 temp;
 308
 309         pci_write_config_byte(dev->pdev, 0xF4, regs->cdv.saveLBB);
 310
 311         REG_WRITE(DSPCLK_GATE_D, regs->cdv.saveDSPCLK_GATE_D);
 312         REG_WRITE(RAMCLK_GATE_D, regs->cdv.saveRAMCLK_GATE_D);
 313
 314         /* BIOS does below anyway */
 315         REG_WRITE(DPIO_CFG, 0);
 316         REG_WRITE(DPIO_CFG, DPIO_MODE_SELECT_0 | DPIO_CMN_RESET_N);
 317
 318         temp = REG_READ(DPLL_A);
 319         if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
 320                 REG_WRITE(DPLL_A, temp | DPLL_SYNCLOCK_ENABLE);
 321                 REG_READ(DPLL_A);
 322         }
 323
 324         temp = REG_READ(DPLL_B);
 325         if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
 326                 REG_WRITE(DPLL_B, temp | DPLL_SYNCLOCK_ENABLE);
 327                 REG_READ(DPLL_B);
 328         }
 329
 330         udelay(500);
 331
 332         REG_WRITE(DSPFW1, regs->cdv.saveDSPFW[0]);
 333         REG_WRITE(DSPFW2, regs->cdv.saveDSPFW[1]);
 334         REG_WRITE(DSPFW3, regs->cdv.saveDSPFW[2]);
 335         REG_WRITE(DSPFW4, regs->cdv.saveDSPFW[3]);
 336         REG_WRITE(DSPFW5, regs->cdv.saveDSPFW[4]);
 337         REG_WRITE(DSPFW6, regs->cdv.saveDSPFW[5]);
 338
 339         REG_WRITE(DSPARB, regs->cdv.saveDSPARB);
 340         REG_WRITE(ADPA, regs->cdv.saveADPA);
 341
 342         REG_WRITE(BLC_PWM_CTL2, regs->saveBLC_PWM_CTL2);
 343         REG_WRITE(LVDS, regs->cdv.saveLVDS);
 344         REG_WRITE(PFIT_CONTROL, regs->cdv.savePFIT_CONTROL);
 345         REG_WRITE(PFIT_PGM_RATIOS, regs->cdv.savePFIT_PGM_RATIOS);
 346         REG_WRITE(BLC_PWM_CTL, regs->saveBLC_PWM_CTL);
 347         REG_WRITE(PP_ON_DELAYS, regs->cdv.savePP_ON_DELAYS);
 348         REG_WRITE(PP_OFF_DELAYS, regs->cdv.savePP_OFF_DELAYS);
 349         REG_WRITE(PP_CYCLE, regs->cdv.savePP_CYCLE);
 350         REG_WRITE(PP_CONTROL, regs->cdv.savePP_CONTROL);
 351
 352         REG_WRITE(VGACNTRL, regs->cdv.saveVGACNTRL);
 353
 354         REG_WRITE(PSB_INT_ENABLE_R, regs->cdv.saveIER);
 355         REG_WRITE(PSB_INT_MASK_R, regs->cdv.saveIMR);
 356
 357         /* Fix arbitration bug */
 358         CDV_MSG_WRITE32(3, 0x30, 0x08027108);
 359
 360         drm_mode_config_reset(dev);
 361
 362         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 363                 connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
 364
 365         /* Resume the modeset for every activated CRTC */
 366         drm_helper_resume_force_mode(dev);
 367         return 0;
 368 }
 369
 370 static int cdv_power_down(struct drm_device *dev)
 371 {
 372         struct drm_psb_private *dev_priv = dev->dev_private;
 373         u32 pwr_cnt, pwr_mask, pwr_sts;
 374         int tries = 5;
 375
 376         pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
 377         pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
 378         pwr_cnt |= PSB_PWRGT_GFX_OFF;
 379         pwr_mask = PSB_PWRGT_GFX_MASK;
 380
 381         outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
 382
 383         while (tries--) {
 384                 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
 385                 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D3)
 386                         return 0;
 387                 udelay(10);
 388         }
 389         return 0;
 390 }
 391
 392 static int cdv_power_up(struct drm_device *dev)
 393 {
 394         struct drm_psb_private *dev_priv = dev->dev_private;
 395         u32 pwr_cnt, pwr_mask, pwr_sts;
 396         int tries = 5;
 397
 398         pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
 399         pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
 400         pwr_cnt |= PSB_PWRGT_GFX_ON;
 401         pwr_mask = PSB_PWRGT_GFX_MASK;
 402
 403         outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
 404
 405         while (tries--) {
 406                 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
 407                 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D0)
 408                         return 0;
 409                 udelay(10);
 410         }
 411         return 0;
 412 }
 413
 414 /* FIXME ? - shared with Poulsbo */
 415 static void cdv_get_core_freq(struct drm_device *dev)
 416 {
 417         uint32_t clock;
 418         struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
 419         struct drm_psb_private *dev_priv = dev->dev_private;
 420
 421         pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
 422         pci_read_config_dword(pci_root, 0xD4, &clock);
 423         pci_dev_put(pci_root);
 424
 425         switch (clock & 0x07) {
 426         case 0:
 427                 dev_priv->core_freq = 100;
 428                 break;
 429         case 1:
 430                 dev_priv->core_freq = 133;
 431                 break;
 432         case 2:
 433                 dev_priv->core_freq = 150;
 434                 break;
 435         case 3:
 436                 dev_priv->core_freq = 178;
 437                 break;
 438         case 4:
 439                 dev_priv->core_freq = 200;
 440                 break;
 441         case 5:
 442         case 6:
 443         case 7:
 444                 dev_priv->core_freq = 266;
 445         default:
 446                 dev_priv->core_freq = 0;
 447         }
 448 }
 449
 450 static int cdv_chip_setup(struct drm_device *dev)
 451 {
 452         cdv_get_core_freq(dev);
 453         gma_intel_opregion_init(dev);
 454         psb_intel_init_bios(dev);
 455         return 0;
 456 }
 457
 458 /* CDV is much like Poulsbo but has MID like SGX offsets and PM */
 459
 460 const struct psb_ops cdv_chip_ops = {
 461         .name = "GMA3600/3650",
 462         .accel_2d = 0,
 463         .pipes = 2,
 464         .crtcs = 2,
 465         .sgx_offset = MRST_SGX_OFFSET,
 466         .chip_setup = cdv_chip_setup,
 467
 468         .crtc_helper = &cdv_intel_helper_funcs,
 469         .crtc_funcs = &cdv_intel_crtc_funcs,
 470
 471         .output_init = cdv_output_init,
 472
 473 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
 474         .backlight_init = cdv_backlight_init,
 475 #endif
 476
 477         .init_pm = cdv_init_pm,
 478         .save_regs = cdv_save_display_registers,
 479         .restore_regs = cdv_restore_display_registers,
 480         .power_down = cdv_power_down,
 481         .power_up = cdv_power_up,
 482 };