g364fb.c 6.8 KB

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  1. /* $Id: g364fb.c,v 1.1.1.1 2007/06/12 07:27:09 eyryu Exp $
  2. *
  3. * linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device
  4. *
  5. * (C) 1998 Thomas Bogendoerfer
  6. *
  7. * This driver is based on tgafb.c
  8. *
  9. * Copyright (C) 1997 Geert Uytterhoeven
  10. * Copyright (C) 1995 Jay Estabrook
  11. *
  12. * This file is subject to the terms and conditions of the GNU General Public
  13. * License. See the file COPYING in the main directory of this archive for
  14. * more details.
  15. */
  16. #include <linux/module.h>
  17. #include <linux/console.h>
  18. #include <linux/kernel.h>
  19. #include <linux/errno.h>
  20. #include <linux/string.h>
  21. #include <linux/mm.h>
  22. #include <linux/slab.h>
  23. #include <linux/vmalloc.h>
  24. #include <linux/delay.h>
  25. #include <linux/interrupt.h>
  26. #include <linux/fb.h>
  27. #include <linux/init.h>
  28. #include <linux/pci.h>
  29. #include <asm/io.h>
  30. #include <asm/jazz.h>
  31. /*
  32. * Various defines for the G364
  33. */
  34. #define G364_MEM_BASE 0xe4400000
  35. #define G364_PORT_BASE 0xe4000000
  36. #define ID_REG 0xe4000000 /* Read only */
  37. #define BOOT_REG 0xe4080000
  38. #define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */
  39. #define DISPLAY_REG 0xe4080118
  40. #define VDISPLAY_REG 0xe4080150
  41. #define MASK_REG 0xe4080200
  42. #define CTLA_REG 0xe4080300
  43. #define CURS_TOGGLE 0x800000
  44. #define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */
  45. #define DELAY_SAMPLE 0x080000
  46. #define PORT_INTER 0x040000
  47. #define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */
  48. #define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */
  49. #define TR_CYCLE_TOG 0x004000
  50. #define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */
  51. #define BLANK_OFF 0x000800
  52. #define FORCE_BLANK 0x000400
  53. #define BLK_FUN_SWTCH 0x000200
  54. #define BLANK_IO 0x000100
  55. #define BLANK_LEVEL 0x000080
  56. #define A_VID_FORM 0x000040
  57. #define D_SYNC_FORM 0x000020
  58. #define FRAME_FLY_PAT 0x000010
  59. #define OP_MODE 0x000008
  60. #define INTL_STAND 0x000004
  61. #define SCRN_FORM 0x000002
  62. #define ENABLE_VTG 0x000001
  63. #define TOP_REG 0xe4080400
  64. #define CURS_PAL_REG 0xe4080508 /* to 0x080518 */
  65. #define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */
  66. #define CURS_POS_REG 0xe4080638
  67. #define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */
  68. #define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */
  69. #define MON_ID_REG 0xe4100000 /* unused */
  70. #define RESET_REG 0xe4180000 /* Write only */
  71. static struct fb_info fb_info;
  72. static struct fb_fix_screeninfo fb_fix __initdata = {
  73. .id = "G364 8plane",
  74. .smem_start = 0x40000000, /* physical address */
  75. .type = FB_TYPE_PACKED_PIXELS,
  76. .visual = FB_VISUAL_PSEUDOCOLOR,
  77. .ypanstep = 1,
  78. .accel = FB_ACCEL_NONE,
  79. };
  80. static struct fb_var_screeninfo fb_var __initdata = {
  81. .bits_per_pixel = 8,
  82. .red = { 0, 8, 0 },
  83. .green = { 0, 8, 0 },
  84. .blue = { 0, 8, 0 },
  85. .activate = FB_ACTIVATE_NOW,
  86. .height = -1,
  87. .width = -1,
  88. .pixclock = 39722,
  89. .left_margin = 40,
  90. .right_margin = 24,
  91. .upper_margin = 32,
  92. .lower_margin = 11,
  93. .hsync_len = 96,
  94. .vsync_len = 2,
  95. .vmode = FB_VMODE_NONINTERLACED,
  96. };
  97. /*
  98. * Interface used by the world
  99. */
  100. int g364fb_init(void);
  101. static int g364fb_pan_display(struct fb_var_screeninfo *var,
  102. struct fb_info *info);
  103. static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
  104. u_int blue, u_int transp,
  105. struct fb_info *info);
  106. static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
  107. static int g364fb_blank(int blank, struct fb_info *info);
  108. static struct fb_ops g364fb_ops = {
  109. .owner = THIS_MODULE,
  110. .fb_setcolreg = g364fb_setcolreg,
  111. .fb_pan_display = g364fb_pan_display,
  112. .fb_blank = g364fb_blank,
  113. .fb_fillrect = cfb_fillrect,
  114. .fb_copyarea = cfb_copyarea,
  115. .fb_imageblit = cfb_imageblit,
  116. .fb_cursor = g364fb_cursor,
  117. };
  118. int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
  119. {
  120. switch (cursor->enable) {
  121. case CM_ERASE:
  122. *(unsigned int *) CTLA_REG |= CURS_TOGGLE;
  123. break;
  124. case CM_MOVE:
  125. case CM_DRAW:
  126. *(unsigned int *) CTLA_REG &= ~CURS_TOGGLE;
  127. *(unsigned int *) CURS_POS_REG =
  128. ((x * fontwidth(p)) << 12) | ((y * fontheight(p)) -
  129. info->var.yoffset);
  130. break;
  131. }
  132. return 0;
  133. }
  134. /*
  135. * Pan or Wrap the Display
  136. *
  137. * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
  138. */
  139. static int g364fb_pan_display(struct fb_var_screeninfo *var,
  140. struct fb_info *info)
  141. {
  142. if (var->xoffset || var->yoffset + var->yres > var->yres_virtual)
  143. return -EINVAL;
  144. *(unsigned int *) TOP_REG = var->yoffset * var->xres;
  145. return 0;
  146. }
  147. /*
  148. * Blank the display.
  149. */
  150. static int g364fb_blank(int blank, struct fb_info *info)
  151. {
  152. if (blank)
  153. *(unsigned int *) CTLA_REG |= FORCE_BLANK;
  154. else
  155. *(unsigned int *) CTLA_REG &= ~FORCE_BLANK;
  156. return 0;
  157. }
  158. /*
  159. * Set a single color register. Return != 0 for invalid regno.
  160. */
  161. static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
  162. u_int blue, u_int transp, struct fb_info *info)
  163. {
  164. volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG;
  165. if (regno > 255)
  166. return 1;
  167. red >>= 8;
  168. green >>= 8;
  169. blue >>= 8;
  170. ptr[regno << 1] = (red << 16) | (green << 8) | blue;
  171. return 0;
  172. }
  173. /*
  174. * Initialisation
  175. */
  176. int __init g364fb_init(void)
  177. {
  178. volatile unsigned int *pal_ptr =
  179. (volatile unsigned int *) CLR_PAL_REG;
  180. volatile unsigned int *curs_pal_ptr =
  181. (volatile unsigned int *) CURS_PAL_REG;
  182. int mem, i, j;
  183. if (fb_get_options("g364fb", NULL))
  184. return -ENODEV;
  185. /* TBD: G364 detection */
  186. /* get the resolution set by ARC console */
  187. *(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG;
  188. fb_var.xres =
  189. (*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4;
  190. fb_var.yres =
  191. (*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2;
  192. *(volatile unsigned int *) CTLA_REG |= ENABLE_VTG;
  193. /* setup cursor */
  194. curs_pal_ptr[0] |= 0x00ffffff;
  195. curs_pal_ptr[2] |= 0x00ffffff;
  196. curs_pal_ptr[4] |= 0x00ffffff;
  197. /*
  198. * first set the whole cursor to transparent
  199. */
  200. for (i = 0; i < 512; i++)
  201. *(unsigned short *) (CURS_PAT_REG + i * 8) = 0;
  202. /*
  203. * switch the last two lines to cursor palette 3
  204. * we assume here, that FONTSIZE_X is 8
  205. */
  206. *(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff;
  207. *(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff;
  208. fb_var.xres_virtual = fbvar.xres;
  209. fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
  210. fb_fix.smem_start = 0x40000000; /* physical address */
  211. /* get size of video memory; this is special for the JAZZ hardware */
  212. mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3;
  213. fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024;
  214. fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres;
  215. fb_info.fbops = &g364fb_ops;
  216. fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */
  217. fb_info.var = fb_var;
  218. fb_info.fix = fb_fix;
  219. fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
  220. fb_alloc_cmap(&fb_info.cmap, 255, 0);
  221. if (register_framebuffer(&fb_info) < 0)
  222. return -EINVAL;
  223. return 0;
  224. }
  225. module_init(g364fb_init);
  226. MODULE_LICENSE("GPL");