LXR linux/drivers/staging/sm750fb/sm750

   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) \
  23writel((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 */
  48void 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
  56void sm750_hw_cursor_disable(struct lynx_cursor *cursor)
  57{
  58        poke32(HWC_ADDRESS, 0);
  59}
  60
  61void sm750_hw_cursor_setSize(struct lynx_cursor *cursor, int w, int h)
  62{
  63        cursor->w = w;
  64        cursor->h = h;
  65}
  66
  67void 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
  76void 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
  85void 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->max_w * 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
 135void 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->max_w * 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