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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * drivers/video/geode/gx1fb_core.c4 * -- Geode GX1 framebuffer driver5 *6 * Copyright (C) 2005 Arcom Control Systems Ltd.7 */8 9#include <linux/aperture.h>10#include <linux/module.h>11#include <linux/kernel.h>12#include <linux/errno.h>13#include <linux/string.h>14#include <linux/mm.h>15#include <linux/delay.h>16#include <linux/fb.h>17#include <linux/init.h>18#include <linux/pci.h>19 20#include "geodefb.h"21#include "display_gx1.h"22#include "video_cs5530.h"23 24static char mode_option[32] = "640x480-16@60";25static int crt_option = 1;26static char panel_option[32] = "";27 28/* Modes relevant to the GX1 (taken from modedb.c) */29static const struct fb_videomode gx1_modedb[] = {30 /* 640x480-60 VESA */31 { NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,32 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },33 /* 640x480-75 VESA */34 { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,35 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },36 /* 640x480-85 VESA */37 { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,38 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },39 /* 800x600-60 VESA */40 { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,41 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,42 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },43 /* 800x600-75 VESA */44 { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,45 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,46 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },47 /* 800x600-85 VESA */48 { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,49 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,50 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },51 /* 1024x768-60 VESA */52 { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,53 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },54 /* 1024x768-75 VESA */55 { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,56 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,57 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },58 /* 1024x768-85 VESA */59 { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,60 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,61 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },62 /* 1280x960-60 VESA */63 { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,64 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,65 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },66 /* 1280x960-85 VESA */67 { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,68 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,69 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },70 /* 1280x1024-60 VESA */71 { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,72 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,73 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },74 /* 1280x1024-75 VESA */75 { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,76 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,77 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },78 /* 1280x1024-85 VESA */79 { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,80 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,81 FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },82};83 84static int gx1_line_delta(int xres, int bpp)85{86 int line_delta = xres * (bpp >> 3);87 88 if (line_delta > 2048)89 line_delta = 4096;90 else if (line_delta > 1024)91 line_delta = 2048;92 else93 line_delta = 1024;94 return line_delta;95}96 97static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)98{99 struct geodefb_par *par = info->par;100 101 /* Maximum resolution is 1280x1024. */102 if (var->xres > 1280 || var->yres > 1024)103 return -EINVAL;104 105 if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y))106 return -EINVAL;107 108 /* Only 16 bpp and 8 bpp is supported by the hardware. */109 if (var->bits_per_pixel == 16) {110 var->red.offset = 11; var->red.length = 5;111 var->green.offset = 5; var->green.length = 6;112 var->blue.offset = 0; var->blue.length = 5;113 var->transp.offset = 0; var->transp.length = 0;114 } else if (var->bits_per_pixel == 8) {115 var->red.offset = 0; var->red.length = 8;116 var->green.offset = 0; var->green.length = 8;117 var->blue.offset = 0; var->blue.length = 8;118 var->transp.offset = 0; var->transp.length = 0;119 } else120 return -EINVAL;121 122 /* Enough video memory? */123 if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)124 return -EINVAL;125 126 /* FIXME: Check timing parameters here? */127 128 return 0;129}130 131static int gx1fb_set_par(struct fb_info *info)132{133 struct geodefb_par *par = info->par;134 135 if (info->var.bits_per_pixel == 16)136 info->fix.visual = FB_VISUAL_TRUECOLOR;137 else138 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;139 140 info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);141 142 par->dc_ops->set_mode(info);143 144 return 0;145}146 147static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)148{149 chan &= 0xffff;150 chan >>= 16 - bf->length;151 return chan << bf->offset;152}153 154static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,155 unsigned blue, unsigned transp,156 struct fb_info *info)157{158 struct geodefb_par *par = info->par;159 160 if (info->var.grayscale) {161 /* grayscale = 0.30*R + 0.59*G + 0.11*B */162 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;163 }164 165 /* Truecolor has hardware independent palette */166 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {167 u32 *pal = info->pseudo_palette;168 u32 v;169 170 if (regno >= 16)171 return -EINVAL;172 173 v = chan_to_field(red, &info->var.red);174 v |= chan_to_field(green, &info->var.green);175 v |= chan_to_field(blue, &info->var.blue);176 177 pal[regno] = v;178 } else {179 if (regno >= 256)180 return -EINVAL;181 182 par->dc_ops->set_palette_reg(info, regno, red, green, blue);183 }184 185 return 0;186}187 188static int gx1fb_blank(int blank_mode, struct fb_info *info)189{190 struct geodefb_par *par = info->par;191 192 return par->vid_ops->blank_display(info, blank_mode);193}194 195static int gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)196{197 struct geodefb_par *par = info->par;198 unsigned gx_base;199 int fb_len;200 int ret;201 202 gx_base = gx1_gx_base();203 if (!gx_base)204 return -ENODEV;205 206 ret = pci_enable_device(dev);207 if (ret < 0)208 return ret;209 210 ret = pci_request_region(dev, 0, "gx1fb (video)");211 if (ret < 0)212 return ret;213 par->vid_regs = pci_ioremap_bar(dev, 0);214 if (!par->vid_regs)215 return -ENOMEM;216 217 if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))218 return -EBUSY;219 par->dc_regs = ioremap(gx_base + 0x8300, 0x100);220 if (!par->dc_regs)221 return -ENOMEM;222 223 if ((fb_len = gx1_frame_buffer_size()) < 0)224 return -ENOMEM;225 info->fix.smem_start = gx_base + 0x800000;226 info->fix.smem_len = fb_len;227 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);228 if (!info->screen_base)229 return -ENOMEM;230 231 dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",232 info->fix.smem_len / 1024, info->fix.smem_start);233 234 return 0;235}236 237static int parse_panel_option(struct fb_info *info)238{239 struct geodefb_par *par = info->par;240 241 if (strcmp(panel_option, "") != 0) {242 int x, y;243 char *s;244 x = simple_strtol(panel_option, &s, 10);245 if (!x)246 return -EINVAL;247 y = simple_strtol(s + 1, NULL, 10);248 if (!y)249 return -EINVAL;250 par->panel_x = x;251 par->panel_y = y;252 }253 return 0;254}255 256static const struct fb_ops gx1fb_ops = {257 .owner = THIS_MODULE,258 FB_DEFAULT_IOMEM_OPS,259 .fb_check_var = gx1fb_check_var,260 .fb_set_par = gx1fb_set_par,261 .fb_setcolreg = gx1fb_setcolreg,262 .fb_blank = gx1fb_blank,263};264 265static struct fb_info *gx1fb_init_fbinfo(struct device *dev)266{267 struct geodefb_par *par;268 struct fb_info *info;269 270 /* Alloc enough space for the pseudo palette. */271 info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);272 if (!info)273 return NULL;274 275 par = info->par;276 277 strcpy(info->fix.id, "GX1");278 279 info->fix.type = FB_TYPE_PACKED_PIXELS;280 info->fix.type_aux = 0;281 info->fix.xpanstep = 0;282 info->fix.ypanstep = 0;283 info->fix.ywrapstep = 0;284 info->fix.accel = FB_ACCEL_NONE;285 286 info->var.nonstd = 0;287 info->var.activate = FB_ACTIVATE_NOW;288 info->var.height = -1;289 info->var.width = -1;290 info->var.accel_flags = 0;291 info->var.vmode = FB_VMODE_NONINTERLACED;292 293 info->fbops = &gx1fb_ops;294 info->node = -1;295 296 info->pseudo_palette = (void *)par + sizeof(struct geodefb_par);297 298 info->var.grayscale = 0;299 300 /* CRT and panel options */301 par->enable_crt = crt_option;302 if (parse_panel_option(info) < 0)303 printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");304 if (!par->panel_x)305 par->enable_crt = 1; /* fall back to CRT if no panel is specified */306 307 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {308 framebuffer_release(info);309 return NULL;310 }311 return info;312}313 314static int gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)315{316 struct geodefb_par *par;317 struct fb_info *info;318 int ret;319 320 ret = aperture_remove_conflicting_pci_devices(pdev, "gx1fb");321 if (ret)322 return ret;323 324 info = gx1fb_init_fbinfo(&pdev->dev);325 if (!info)326 return -ENOMEM;327 par = info->par;328 329 /* GX1 display controller and CS5530 video device */330 par->dc_ops = &gx1_dc_ops;331 par->vid_ops = &cs5530_vid_ops;332 333 if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {334 dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");335 goto err;336 }337 338 ret = fb_find_mode(&info->var, info, mode_option,339 gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);340 if (ret == 0 || ret == 4) {341 dev_err(&pdev->dev, "could not find valid video mode\n");342 ret = -EINVAL;343 goto err;344 }345 346 /* Clear the frame buffer of garbage. */347 memset_io(info->screen_base, 0, info->fix.smem_len);348 349 gx1fb_check_var(&info->var, info);350 gx1fb_set_par(info);351 352 if (register_framebuffer(info) < 0) {353 ret = -EINVAL;354 goto err;355 }356 pci_set_drvdata(pdev, info);357 fb_info(info, "%s frame buffer device\n", info->fix.id);358 return 0;359 360 err:361 if (info->screen_base) {362 iounmap(info->screen_base);363 pci_release_region(pdev, 0);364 }365 if (par->vid_regs) {366 iounmap(par->vid_regs);367 pci_release_region(pdev, 1);368 }369 if (par->dc_regs) {370 iounmap(par->dc_regs);371 release_mem_region(gx1_gx_base() + 0x8300, 0x100);372 }373 374 fb_dealloc_cmap(&info->cmap);375 framebuffer_release(info);376 377 return ret;378}379 380static void gx1fb_remove(struct pci_dev *pdev)381{382 struct fb_info *info = pci_get_drvdata(pdev);383 struct geodefb_par *par = info->par;384 385 unregister_framebuffer(info);386 387 iounmap((void __iomem *)info->screen_base);388 pci_release_region(pdev, 0);389 390 iounmap(par->vid_regs);391 pci_release_region(pdev, 1);392 393 iounmap(par->dc_regs);394 release_mem_region(gx1_gx_base() + 0x8300, 0x100);395 396 fb_dealloc_cmap(&info->cmap);397 398 framebuffer_release(info);399}400 401#ifndef MODULE402static void __init gx1fb_setup(char *options)403{404 char *this_opt;405 406 if (!options || !*options)407 return;408 409 while ((this_opt = strsep(&options, ","))) {410 if (!*this_opt)411 continue;412 413 if (!strncmp(this_opt, "mode:", 5))414 strscpy(mode_option, this_opt + 5, sizeof(mode_option));415 else if (!strncmp(this_opt, "crt:", 4))416 crt_option = !!simple_strtoul(this_opt + 4, NULL, 0);417 else if (!strncmp(this_opt, "panel:", 6))418 strscpy(panel_option, this_opt + 6, sizeof(panel_option));419 else420 strscpy(mode_option, this_opt, sizeof(mode_option));421 }422}423#endif424 425static struct pci_device_id gx1fb_id_table[] = {426 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,427 PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,428 0xff0000, 0 },429 { 0, }430};431 432MODULE_DEVICE_TABLE(pci, gx1fb_id_table);433 434static struct pci_driver gx1fb_driver = {435 .name = "gx1fb",436 .id_table = gx1fb_id_table,437 .probe = gx1fb_probe,438 .remove = gx1fb_remove,439};440 441static int __init gx1fb_init(void)442{443#ifndef MODULE444 char *option = NULL;445#endif446 447 if (fb_modesetting_disabled("gx1fb"))448 return -ENODEV;449 450#ifndef MODULE451 if (fb_get_options("gx1fb", &option))452 return -ENODEV;453 gx1fb_setup(option);454#endif455 return pci_register_driver(&gx1fb_driver);456}457 458static void gx1fb_cleanup(void)459{460 pci_unregister_driver(&gx1fb_driver);461}462 463module_init(gx1fb_init);464module_exit(gx1fb_cleanup);465 466module_param_string(mode, mode_option, sizeof(mode_option), 0444);467MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");468 469module_param_named(crt, crt_option, int, 0444);470MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");471 472module_param_string(panel, panel_option, sizeof(panel_option), 0444);473MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");474 475MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");476MODULE_LICENSE("GPL");477