1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/module.h>
3 #include <linux/kernel.h>
4 #include <linux/errno.h>
5 #include <linux/string.h>
6 #include <linux/mm.h>
7 #include <linux/slab.h>
8 #include <linux/delay.h>
9 #include <linux/fb.h>
10 #include <linux/ioport.h>
11 #include <linux/init.h>
12 #include <linux/pci.h>
13 #include <linux/vmalloc.h>
14 #include <linux/pagemap.h>
15 #include <linux/console.h>
16 #include <linux/platform_device.h>
17 #include <linux/screen_info.h>
18
19 #include "sm750.h"
20 #include "sm750_cursor.h"
21
22 #define poke32(addr, data) \
23 writel((data), cursor->mmio + (addr))
24
25 /* cursor control for voyager and 718/750*/
26 #define HWC_ADDRESS 0x0
27 #define HWC_ADDRESS_ENABLE BIT(31)
28 #define HWC_ADDRESS_EXT BIT(27)
29 #define HWC_ADDRESS_CS BIT(26)
30 #define HWC_ADDRESS_ADDRESS_MASK 0x3ffffff
31
32 #define HWC_LOCATION 0x4
33 #define HWC_LOCATION_TOP BIT(27)
34 #define HWC_LOCATION_Y_SHIFT 16
35 #define HWC_LOCATION_Y_MASK (0x7ff << 16)
36 #define HWC_LOCATION_LEFT BIT(11)
37 #define HWC_LOCATION_X_MASK 0x7ff
38
39 #define HWC_COLOR_12 0x8
40 #define HWC_COLOR_12_2_RGB565_SHIFT 16
41 #define HWC_COLOR_12_2_RGB565_MASK (0xffff << 16)
42 #define HWC_COLOR_12_1_RGB565_MASK 0xffff
43
44 #define HWC_COLOR_3 0xC
45 #define HWC_COLOR_3_RGB565_MASK 0xffff
46
47 /* hw_cursor_xxx works for voyager,718 and 750 */
sm750_hw_cursor_enable(struct lynx_cursor * cursor)48 void sm750_hw_cursor_enable(struct lynx_cursor *cursor)
49 {
50 u32 reg;
51
52 reg = (cursor->offset & HWC_ADDRESS_ADDRESS_MASK) | HWC_ADDRESS_ENABLE;
53 poke32(HWC_ADDRESS, reg);
54 }
55
sm750_hw_cursor_disable(struct lynx_cursor * cursor)56 void sm750_hw_cursor_disable(struct lynx_cursor *cursor)
57 {
58 poke32(HWC_ADDRESS, 0);
59 }
60
sm750_hw_cursor_setSize(struct lynx_cursor * cursor,int w,int h)61 void sm750_hw_cursor_setSize(struct lynx_cursor *cursor, int w, int h)
62 {
63 cursor->w = w;
64 cursor->h = h;
65 }
66
sm750_hw_cursor_setPos(struct lynx_cursor * cursor,int x,int y)67 void sm750_hw_cursor_setPos(struct lynx_cursor *cursor, int x, int y)
68 {
69 u32 reg;
70
71 reg = ((y << HWC_LOCATION_Y_SHIFT) & HWC_LOCATION_Y_MASK) |
72 (x & HWC_LOCATION_X_MASK);
73 poke32(HWC_LOCATION, reg);
74 }
75
sm750_hw_cursor_setColor(struct lynx_cursor * cursor,u32 fg,u32 bg)76 void sm750_hw_cursor_setColor(struct lynx_cursor *cursor, u32 fg, u32 bg)
77 {
78 u32 reg = (fg << HWC_COLOR_12_2_RGB565_SHIFT) &
79 HWC_COLOR_12_2_RGB565_MASK;
80
81 poke32(HWC_COLOR_12, reg | (bg & HWC_COLOR_12_1_RGB565_MASK));
82 poke32(HWC_COLOR_3, 0xffe0);
83 }
84
sm750_hw_cursor_setData(struct lynx_cursor * cursor,u16 rop,const u8 * pcol,const u8 * pmsk)85 void sm750_hw_cursor_setData(struct lynx_cursor *cursor, u16 rop,
86 const u8 *pcol, const u8 *pmsk)
87 {
88 int i, j, count, pitch, offset;
89 u8 color, mask, opr;
90 u16 data;
91 void __iomem *pbuffer, *pstart;
92
93 /* in byte*/
94 pitch = cursor->w >> 3;
95
96 /* in byte */
97 count = pitch * cursor->h;
98
99 /* in byte */
100 offset = cursor->maxW * 2 / 8;
101
102 data = 0;
103 pstart = cursor->vstart;
104 pbuffer = pstart;
105
106 for (i = 0; i < count; i++) {
107 color = *pcol++;
108 mask = *pmsk++;
109 data = 0;
110
111 for (j = 0; j < 8; j++) {
112 if (mask & (0x80 >> j)) {
113 if (rop == ROP_XOR)
114 opr = mask ^ color;
115 else
116 opr = mask & color;
117
118 /* 2 stands for forecolor and 1 for backcolor */
119 data |= ((opr & (0x80 >> j)) ? 2 : 1) << (j * 2);
120 }
121 }
122 iowrite16(data, pbuffer);
123
124 /* assume pitch is 1,2,4,8,...*/
125 if ((i + 1) % pitch == 0) {
126 /* need a return */
127 pstart += offset;
128 pbuffer = pstart;
129 } else {
130 pbuffer += sizeof(u16);
131 }
132 }
133 }
134
sm750_hw_cursor_setData2(struct lynx_cursor * cursor,u16 rop,const u8 * pcol,const u8 * pmsk)135 void sm750_hw_cursor_setData2(struct lynx_cursor *cursor, u16 rop,
136 const u8 *pcol, const u8 *pmsk)
137 {
138 int i, j, count, pitch, offset;
139 u8 color, mask;
140 u16 data;
141 void __iomem *pbuffer, *pstart;
142
143 /* in byte*/
144 pitch = cursor->w >> 3;
145
146 /* in byte */
147 count = pitch * cursor->h;
148
149 /* in byte */
150 offset = cursor->maxW * 2 / 8;
151
152 data = 0;
153 pstart = cursor->vstart;
154 pbuffer = pstart;
155
156 for (i = 0; i < count; i++) {
157 color = *pcol++;
158 mask = *pmsk++;
159 data = 0;
160
161 for (j = 0; j < 8; j++) {
162 if (mask & (1 << j))
163 data |= ((color & (1 << j)) ? 1 : 2) << (j * 2);
164 }
165 iowrite16(data, pbuffer);
166
167 /* assume pitch is 1,2,4,8,...*/
168 if (!(i & (pitch - 1))) {
169 /* need a return */
170 pstart += offset;
171 pbuffer = pstart;
172 } else {
173 pbuffer += sizeof(u16);
174 }
175 }
176 }
177