1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2012 Texas Instruments
4  * Author: Rob Clark <robdclark@gmail.com>
5  */
6 
7 #ifndef __TILCDC_REGS_H__
8 #define __TILCDC_REGS_H__
9 
10 /* LCDC register definitions, based on da8xx-fb */
11 
12 #include <linux/bitops.h>
13 
14 #include "tilcdc_drv.h"
15 
16 /* LCDC Status Register */
17 #define LCDC_END_OF_FRAME1                       BIT(9)
18 #define LCDC_END_OF_FRAME0                       BIT(8)
19 #define LCDC_PL_LOAD_DONE                        BIT(6)
20 #define LCDC_FIFO_UNDERFLOW                      BIT(5)
21 #define LCDC_SYNC_LOST                           BIT(2)
22 #define LCDC_FRAME_DONE                          BIT(0)
23 
24 /* LCDC DMA Control Register */
25 #define LCDC_DMA_BURST_SIZE(x)                   ((x) << 4)
26 #define LCDC_DMA_BURST_SIZE_MASK                 ((0x7) << 4)
27 #define LCDC_DMA_BURST_1                         0x0
28 #define LCDC_DMA_BURST_2                         0x1
29 #define LCDC_DMA_BURST_4                         0x2
30 #define LCDC_DMA_BURST_8                         0x3
31 #define LCDC_DMA_BURST_16                        0x4
32 #define LCDC_DMA_FIFO_THRESHOLD(x)               ((x) << 8)
33 #define LCDC_DMA_FIFO_THRESHOLD_MASK             ((0x3) << 8)
34 #define LCDC_V1_END_OF_FRAME_INT_ENA             BIT(2)
35 #define LCDC_V2_END_OF_FRAME0_INT_ENA            BIT(8)
36 #define LCDC_V2_END_OF_FRAME1_INT_ENA            BIT(9)
37 #define LCDC_DUAL_FRAME_BUFFER_ENABLE            BIT(0)
38 
39 /* LCDC Control Register */
40 #define LCDC_CLK_DIVISOR(x)                      ((x) << 8)
41 #define LCDC_CLK_DIVISOR_MASK                    ((0xFF) << 8)
42 #define LCDC_RASTER_MODE                         0x01
43 
44 /* LCDC Raster Control Register */
45 #define LCDC_PALETTE_LOAD_MODE(x)                ((x) << 20)
46 #define LCDC_PALETTE_LOAD_MODE_MASK              ((0x3) << 20)
47 #define PALETTE_AND_DATA                         0x00
48 #define PALETTE_ONLY                             0x01
49 #define DATA_ONLY                                0x02
50 
51 #define LCDC_MONO_8BIT_MODE                      BIT(9)
52 #define LCDC_RASTER_ORDER                        BIT(8)
53 #define LCDC_TFT_MODE                            BIT(7)
54 #define LCDC_V1_UNDERFLOW_INT_ENA                BIT(6)
55 #define LCDC_V2_UNDERFLOW_INT_ENA                BIT(5)
56 #define LCDC_V1_PL_INT_ENA                       BIT(4)
57 #define LCDC_V2_PL_INT_ENA                       BIT(6)
58 #define LCDC_V1_SYNC_LOST_INT_ENA                BIT(5)
59 #define LCDC_V1_FRAME_DONE_INT_ENA               BIT(3)
60 #define LCDC_MONOCHROME_MODE                     BIT(1)
61 #define LCDC_RASTER_ENABLE                       BIT(0)
62 #define LCDC_TFT_ALT_ENABLE                      BIT(23)
63 #define LCDC_STN_565_ENABLE                      BIT(24)
64 #define LCDC_V2_DMA_CLK_EN                       BIT(2)
65 #define LCDC_V2_LIDD_CLK_EN                      BIT(1)
66 #define LCDC_V2_CORE_CLK_EN                      BIT(0)
67 #define LCDC_V2_LPP_B10                          26
68 #define LCDC_V2_TFT_24BPP_MODE                   BIT(25)
69 #define LCDC_V2_TFT_24BPP_UNPACK                 BIT(26)
70 
71 /* LCDC Raster Timing 2 Register */
72 #define LCDC_AC_BIAS_TRANSITIONS_PER_INT(x)      ((x) << 16)
73 #define LCDC_AC_BIAS_TRANSITIONS_PER_INT_MASK    ((0xF) << 16)
74 #define LCDC_AC_BIAS_FREQUENCY(x)                ((x) << 8)
75 #define LCDC_AC_BIAS_FREQUENCY_MASK              ((0xFF) << 8)
76 #define LCDC_SYNC_CTRL                           BIT(25)
77 #define LCDC_SYNC_EDGE                           BIT(24)
78 #define LCDC_INVERT_PIXEL_CLOCK                  BIT(22)
79 #define LCDC_INVERT_HSYNC                        BIT(21)
80 #define LCDC_INVERT_VSYNC                        BIT(20)
81 #define LCDC_LPP_B10                             BIT(26)
82 
83 /* LCDC Block */
84 #define LCDC_PID_REG                             0x0
85 #define LCDC_CTRL_REG                            0x4
86 #define LCDC_STAT_REG                            0x8
87 #define LCDC_RASTER_CTRL_REG                     0x28
88 #define LCDC_RASTER_TIMING_0_REG                 0x2c
89 #define LCDC_RASTER_TIMING_1_REG                 0x30
90 #define LCDC_RASTER_TIMING_2_REG                 0x34
91 #define LCDC_DMA_CTRL_REG                        0x40
92 #define LCDC_DMA_FB_BASE_ADDR_0_REG              0x44
93 #define LCDC_DMA_FB_CEILING_ADDR_0_REG           0x48
94 #define LCDC_DMA_FB_BASE_ADDR_1_REG              0x4c
95 #define LCDC_DMA_FB_CEILING_ADDR_1_REG           0x50
96 
97 /* Interrupt Registers available only in Version 2 */
98 #define LCDC_RAW_STAT_REG                        0x58
99 #define LCDC_MASKED_STAT_REG                     0x5c
100 #define LCDC_INT_ENABLE_SET_REG                  0x60
101 #define LCDC_INT_ENABLE_CLR_REG                  0x64
102 #define LCDC_END_OF_INT_IND_REG                  0x68
103 
104 /* Clock registers available only on Version 2 */
105 #define LCDC_CLK_ENABLE_REG                      0x6c
106 #define LCDC_CLK_RESET_REG                       0x70
107 #define LCDC_CLK_MAIN_RESET                      BIT(3)
108 
109 
110 /*
111  * Helpers:
112  */
113 
114 static inline void tilcdc_write(struct drm_device *dev, u32 reg, u32 data)
115 {
116 	struct tilcdc_drm_private *priv = dev->dev_private;
117 	iowrite32(data, priv->mmio + reg);
118 }
119 
120 static inline void tilcdc_write64(struct drm_device *dev, u32 reg, u64 data)
121 {
122 	struct tilcdc_drm_private *priv = dev->dev_private;
123 	volatile void __iomem *addr = priv->mmio + reg;
124 
125 #if defined(iowrite64) && !defined(iowrite64_is_nonatomic)
126 	iowrite64(data, addr);
127 #else
128 	__iowmb();
129 	/* This compiles to strd (=64-bit write) on ARM7 */
130 	*(volatile u64 __force *)addr = __cpu_to_le64(data);
131 #endif
132 }
133 
134 static inline u32 tilcdc_read(struct drm_device *dev, u32 reg)
135 {
136 	struct tilcdc_drm_private *priv = dev->dev_private;
137 	return ioread32(priv->mmio + reg);
138 }
139 
140 static inline void tilcdc_write_mask(struct drm_device *dev, u32 reg,
141 				     u32 val, u32 mask)
142 {
143 	tilcdc_write(dev, reg, (tilcdc_read(dev, reg) & ~mask) | (val & mask));
144 }
145 
146 static inline void tilcdc_set(struct drm_device *dev, u32 reg, u32 mask)
147 {
148 	tilcdc_write(dev, reg, tilcdc_read(dev, reg) | mask);
149 }
150 
151 static inline void tilcdc_clear(struct drm_device *dev, u32 reg, u32 mask)
152 {
153 	tilcdc_write(dev, reg, tilcdc_read(dev, reg) & ~mask);
154 }
155 
156 /* the register to read/clear irqstatus differs between v1 and v2 of the IP */
157 static inline u32 tilcdc_irqstatus_reg(struct drm_device *dev)
158 {
159 	struct tilcdc_drm_private *priv = dev->dev_private;
160 	return (priv->rev == 2) ? LCDC_MASKED_STAT_REG : LCDC_STAT_REG;
161 }
162 
163 static inline u32 tilcdc_read_irqstatus(struct drm_device *dev)
164 {
165 	return tilcdc_read(dev, tilcdc_irqstatus_reg(dev));
166 }
167 
168 static inline void tilcdc_clear_irqstatus(struct drm_device *dev, u32 mask)
169 {
170 	tilcdc_write(dev, tilcdc_irqstatus_reg(dev), mask);
171 }
172 
173 #endif /* __TILCDC_REGS_H__ */
174