drivers/gpu/drm/tilcdc/tilcdc_regs.h

   1 /*
   2  * Copyright (C) 2012 Texas Instruments
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __TILCDC_REGS_H__
  19 #define __TILCDC_REGS_H__
  20
  21 /* LCDC register definitions, based on da8xx-fb */
  22
  23 #include <linux/bitops.h>
  24
  25 #include "tilcdc_drv.h"
  26
  27 /* LCDC Status Register */
  28 #define LCDC_END_OF_FRAME1                       BIT(9)
  29 #define LCDC_END_OF_FRAME0                       BIT(8)
  30 #define LCDC_PL_LOAD_DONE                        BIT(6)
  31 #define LCDC_FIFO_UNDERFLOW                      BIT(5)
  32 #define LCDC_SYNC_LOST                           BIT(2)
  33 #define LCDC_FRAME_DONE                          BIT(0)
  34
  35 /* LCDC DMA Control Register */
  36 #define LCDC_DMA_BURST_SIZE(x)                   ((x) << 4)
  37 #define LCDC_DMA_BURST_1                         0x0
  38 #define LCDC_DMA_BURST_2                         0x1
  39 #define LCDC_DMA_BURST_4                         0x2
  40 #define LCDC_DMA_BURST_8                         0x3
  41 #define LCDC_DMA_BURST_16                        0x4
  42 #define LCDC_V1_END_OF_FRAME_INT_ENA             BIT(2)
  43 #define LCDC_V2_END_OF_FRAME0_INT_ENA            BIT(8)
  44 #define LCDC_V2_END_OF_FRAME1_INT_ENA            BIT(9)
  45 #define LCDC_DUAL_FRAME_BUFFER_ENABLE            BIT(0)
  46
  47 /* LCDC Control Register */
  48 #define LCDC_CLK_DIVISOR(x)                      ((x) << 8)
  49 #define LCDC_RASTER_MODE                         0x01
  50
  51 /* LCDC Raster Control Register */
  52 #define LCDC_PALETTE_LOAD_MODE(x)                ((x) << 20)
  53 #define PALETTE_AND_DATA                         0x00
  54 #define PALETTE_ONLY                             0x01
  55 #define DATA_ONLY                                0x02
  56
  57 #define LCDC_MONO_8BIT_MODE                      BIT(9)
  58 #define LCDC_RASTER_ORDER                        BIT(8)
  59 #define LCDC_TFT_MODE                            BIT(7)
  60 #define LCDC_V1_UNDERFLOW_INT_ENA                BIT(6)
  61 #define LCDC_V2_UNDERFLOW_INT_ENA                BIT(5)
  62 #define LCDC_V1_PL_INT_ENA                       BIT(4)
  63 #define LCDC_V2_PL_INT_ENA                       BIT(6)
  64 #define LCDC_MONOCHROME_MODE                     BIT(1)
  65 #define LCDC_RASTER_ENABLE                       BIT(0)
  66 #define LCDC_TFT_ALT_ENABLE                      BIT(23)
  67 #define LCDC_STN_565_ENABLE                      BIT(24)
  68 #define LCDC_V2_DMA_CLK_EN                       BIT(2)
  69 #define LCDC_V2_LIDD_CLK_EN                      BIT(1)
  70 #define LCDC_V2_CORE_CLK_EN                      BIT(0)
  71 #define LCDC_V2_LPP_B10                          26
  72 #define LCDC_V2_TFT_24BPP_MODE                   BIT(25)
  73 #define LCDC_V2_TFT_24BPP_UNPACK                 BIT(26)
  74
  75 /* LCDC Raster Timing 2 Register */
  76 #define LCDC_AC_BIAS_TRANSITIONS_PER_INT(x)      ((x) << 16)
  77 #define LCDC_AC_BIAS_FREQUENCY(x)                ((x) << 8)
  78 #define LCDC_SYNC_CTRL                           BIT(25)
  79 #define LCDC_SYNC_EDGE                           BIT(24)
  80 #define LCDC_INVERT_PIXEL_CLOCK                  BIT(22)
  81 #define LCDC_INVERT_HSYNC                        BIT(21)
  82 #define LCDC_INVERT_VSYNC                        BIT(20)
  83 #define LCDC_LPP_B10                             BIT(26)
  84
  85 /* LCDC Block */
  86 #define LCDC_PID_REG                             0x0
  87 #define LCDC_CTRL_REG                            0x4
  88 #define LCDC_STAT_REG                            0x8
  89 #define LCDC_RASTER_CTRL_REG                     0x28
  90 #define LCDC_RASTER_TIMING_0_REG                 0x2c
  91 #define LCDC_RASTER_TIMING_1_REG                 0x30
  92 #define LCDC_RASTER_TIMING_2_REG                 0x34
  93 #define LCDC_DMA_CTRL_REG                        0x40
  94 #define LCDC_DMA_FB_BASE_ADDR_0_REG              0x44
  95 #define LCDC_DMA_FB_CEILING_ADDR_0_REG           0x48
  96 #define LCDC_DMA_FB_BASE_ADDR_1_REG              0x4c
  97 #define LCDC_DMA_FB_CEILING_ADDR_1_REG           0x50
  98
  99 /* Interrupt Registers available only in Version 2 */
 100 #define LCDC_RAW_STAT_REG                        0x58
 101 #define LCDC_MASKED_STAT_REG                     0x5c
 102 #define LCDC_INT_ENABLE_SET_REG                  0x60
 103 #define LCDC_INT_ENABLE_CLR_REG                  0x64
 104 #define LCDC_END_OF_INT_IND_REG                  0x68
 105
 106 /* Clock registers available only on Version 2 */
 107 #define LCDC_CLK_ENABLE_REG                      0x6c
 108 #define LCDC_CLK_RESET_REG                       0x70
 109 #define LCDC_CLK_MAIN_RESET                      BIT(3)
 110
 111
 112 /*
 113  * Helpers:
 114  */
 115
 116 static inline void tilcdc_write(struct drm_device *dev, u32 reg, u32 data)
 117 {
 118         struct tilcdc_drm_private *priv = dev->dev_private;
 119         iowrite32(data, priv->mmio + reg);
 120 }
 121
 122 static inline void tilcdc_write64(struct drm_device *dev, u32 reg, u64 data)
 123 {
 124         struct tilcdc_drm_private *priv = dev->dev_private;
 125         volatile void __iomem *addr = priv->mmio + reg;
 126
 127 #ifdef iowrite64
 128         iowrite64(data, addr);
 129 #else
 130         __iowmb();
 131         /* This compiles to strd (=64-bit write) on ARM7 */
 132         *(volatile u64 __force *)addr = __cpu_to_le64(data);
 133 #endif
 134 }
 135
 136 static inline u32 tilcdc_read(struct drm_device *dev, u32 reg)
 137 {
 138         struct tilcdc_drm_private *priv = dev->dev_private;
 139         return ioread32(priv->mmio + reg);
 140 }
 141
 142 static inline void tilcdc_set(struct drm_device *dev, u32 reg, u32 mask)
 143 {
 144         tilcdc_write(dev, reg, tilcdc_read(dev, reg) | mask);
 145 }
 146
 147 static inline void tilcdc_clear(struct drm_device *dev, u32 reg, u32 mask)
 148 {
 149         tilcdc_write(dev, reg, tilcdc_read(dev, reg) & ~mask);
 150 }
 151
 152 /* the register to read/clear irqstatus differs between v1 and v2 of the IP */
 153 static inline u32 tilcdc_irqstatus_reg(struct drm_device *dev)
 154 {
 155         struct tilcdc_drm_private *priv = dev->dev_private;
 156         return (priv->rev == 2) ? LCDC_MASKED_STAT_REG : LCDC_STAT_REG;
 157 }
 158
 159 static inline u32 tilcdc_read_irqstatus(struct drm_device *dev)
 160 {
 161         return tilcdc_read(dev, tilcdc_irqstatus_reg(dev));
 162 }
 163
 164 static inline void tilcdc_clear_irqstatus(struct drm_device *dev, u32 mask)
 165 {
 166         tilcdc_write(dev, tilcdc_irqstatus_reg(dev), mask);
 167 }
 168
 169 #endif /* __TILCDC_REGS_H__ */