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 u32 tilcdc_read(struct drm_device *dev, u32 reg)
123 {
124 	struct tilcdc_drm_private *priv = dev->dev_private;
125 	return ioread32(priv->mmio + reg);
126 }
127 
128 static inline void tilcdc_set(struct drm_device *dev, u32 reg, u32 mask)
129 {
130 	tilcdc_write(dev, reg, tilcdc_read(dev, reg) | mask);
131 }
132 
133 static inline void tilcdc_clear(struct drm_device *dev, u32 reg, u32 mask)
134 {
135 	tilcdc_write(dev, reg, tilcdc_read(dev, reg) & ~mask);
136 }
137 
138 /* the register to read/clear irqstatus differs between v1 and v2 of the IP */
139 static inline u32 tilcdc_irqstatus_reg(struct drm_device *dev)
140 {
141 	struct tilcdc_drm_private *priv = dev->dev_private;
142 	return (priv->rev == 2) ? LCDC_MASKED_STAT_REG : LCDC_STAT_REG;
143 }
144 
145 static inline u32 tilcdc_read_irqstatus(struct drm_device *dev)
146 {
147 	return tilcdc_read(dev, tilcdc_irqstatus_reg(dev));
148 }
149 
150 static inline void tilcdc_clear_irqstatus(struct drm_device *dev, u32 mask)
151 {
152 	tilcdc_write(dev, tilcdc_irqstatus_reg(dev), mask);
153 }
154 
155 #endif /* __TILCDC_REGS_H__ */
156