// SPDX-License-Identifier: GPL-2.0-or-later /* * Geode LX framebuffer driver. * * Copyright (C) 2007 Advanced Micro Devices, Inc. * Built from gxfb (which is Copyright (C) 2006 Arcom Control Systems Ltd.) */ #include <linux/aperture.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/console.h> #include <linux/mm.h> #include <linux/suspend.h> #include <linux/delay.h> #include <linux/fb.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/uaccess.h> #include <asm/olpc.h> #include "lxfb.h" static char *mode_option; static int noclear, nopanel, nocrt; static int vram; static int vt_switch; /* Most of these modes are sorted in ascending order, but * since the first entry in this table is the "default" mode, * we try to make it something sane - 640x480-60 is sane */ static struct fb_videomode geode_modedb[] = { /* 640x480-60 */ { NULL, 60, 640, 480, 39682, 48, 8, 25, 2, 88, 2, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 640x400-70 */ { NULL, 70, 640, 400, 39770, 40, 8, 28, 5, 96, 2, FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-70 */ { NULL, 70, 640, 480, 35014, 88, 24, 15, 2, 64, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-72 */ { NULL, 72, 640, 480, 32102, 120, 16, 20, 1, 40, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-75 */ { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-85 */ { NULL, 85, 640, 480, 27780, 80, 56, 25, 1, 56, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-90 */ { NULL, 90, 640, 480, 26392, 96, 32, 22, 1, 64, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-100 */ { NULL, 100, 640, 480, 23167, 104, 40, 25, 1, 64, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 640x480-60 */ { NULL, 60, 640, 480, 39682, 48, 16, 25, 10, 88, 2, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-56 */ { NULL, 56, 800, 600, 27901, 128, 24, 22, 1, 72, 2, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-60 */ { NULL, 60, 800, 600, 25131, 72, 32, 23, 1, 136, 4, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-70 */ { NULL, 70, 800, 600, 21873, 120, 40, 21, 4, 80, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-72 */ { NULL, 72, 800, 600, 20052, 64, 56, 23, 37, 120, 6, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-75 */ { NULL, 75, 800, 600, 20202, 160, 16, 21, 1, 80, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-85 */ { NULL, 85, 800, 600, 17790, 152, 32, 27, 1, 64, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-90 */ { NULL, 90, 800, 600, 16648, 128, 40, 28, 1, 88, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-100 */ { NULL, 100, 800, 600, 14667, 136, 48, 27, 1, 88, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 800x600-60 */ { NULL, 60, 800, 600, 25131, 88, 40, 23, 1, 128, 4, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-60 */ { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-70 */ { NULL, 70, 1024, 768, 13346, 144, 24, 29, 3, 136, 6, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-72 */ { NULL, 72, 1024, 768, 12702, 168, 56, 29, 4, 112, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-75 */ { NULL, 75, 1024, 768, 12703, 176, 16, 28, 1, 96, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-85 */ { NULL, 85, 1024, 768, 10581, 208, 48, 36, 1, 96, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-90 */ { NULL, 90, 1024, 768, 9981, 176, 64, 37, 1, 112, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-100 */ { NULL, 100, 1024, 768, 8825, 184, 72, 42, 1, 112, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1024x768-60 */ { NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-60 */ { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-70 */ { NULL, 70, 1152, 864, 10254, 192, 72, 32, 8, 120, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-72 */ { NULL, 72, 1152, 864, 9866, 200, 72, 33, 7, 128, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-75 */ { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-85 */ { NULL, 85, 1152, 864, 8357, 200, 72, 37, 3, 128, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-90 */ { NULL, 90, 1152, 864, 7719, 208, 80, 42, 9, 128, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-100 */ { NULL, 100, 1152, 864, 6947, 208, 80, 48, 3, 128, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1152x864-60 */ { NULL, 60, 1152, 864, 12251, 184, 64, 27, 1, 120, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-60 */ { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-70 */ { NULL, 70, 1280, 1024, 7719, 224, 88, 38, 6, 136, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-72 */ { NULL, 72, 1280, 1024, 7490, 224, 88, 39, 7, 136, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-75 */ { NULL, 75, 1280, 1024, 7409, 248, 16, 38, 1, 144, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-85 */ { NULL, 85, 1280, 1024, 6351, 224, 64, 44, 1, 160, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-90 */ { NULL, 90, 1280, 1024, 5791, 240, 96, 51, 12, 144, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-100 */ { NULL, 100, 1280, 1024, 5212, 240, 96, 57, 6, 144, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1280x1024-60 */ { NULL, 60, 1280, 1024, 9262, 248, 48, 38, 1, 112, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-60 */ { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-70 */ { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-72 */ { NULL, 72, 1600, 1200, 5053, 288, 112, 47, 13, 176, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-75 */ { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-85 */ { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-90 */ { NULL, 90, 1600, 1200, 3981, 304, 128, 60, 1, 176, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-100 */ { NULL, 100, 1600, 1200, 3563, 304, 128, 67, 1, 176, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1600x1200-60 */ { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 }, /* 1920x1440-60 */ { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 208, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1920x1440-70 */ { NULL, 70, 1920, 1440, 3593, 360, 152, 55, 8, 208, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1920x1440-72 */ { NULL, 72, 1920, 1440, 3472, 360, 152, 68, 4, 208, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1920x1440-75 */ { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3, 0, FB_VMODE_NONINTERLACED, 0 }, /* 1920x1440-85 */ { NULL, 85, 1920, 1440, 2929, 368, 152, 68, 1, 216, 3, 0, FB_VMODE_NONINTERLACED, 0 }, }; static struct fb_videomode olpc_dcon_modedb[] = { /* The only mode the DCON has is 1200x900 */ { NULL, 50, 1200, 900, 17460, 24, 8, 4, 5, 8, 3, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, 0 } }; static void get_modedb(struct fb_videomode **modedb, unsigned int *size) { if (olpc_has_dcon()) { *modedb = (struct fb_videomode *) olpc_dcon_modedb; *size = ARRAY_SIZE(olpc_dcon_modedb); } else { *modedb = (struct fb_videomode *) geode_modedb; *size = ARRAY_SIZE(geode_modedb); } } static int lxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { if (!var->pixclock) return -EINVAL; if (var->xres > 1920 || var->yres > 1440) return -EINVAL; if (var->bits_per_pixel == 32) { var->red.offset = 16; var->red.length = 8; var->green.offset = 8; var->green.length = 8; var->blue.offset = 0; var->blue.length = 8; } else if (var->bits_per_pixel == 16) { var->red.offset = 11; var->red.length = 5; var->green.offset = 5; var->green.length = 6; var->blue.offset = 0; var->blue.length = 5; } else if (var->bits_per_pixel == 8) { var->red.offset = 0; var->red.length = 8; var->green.offset = 0; var->green.length = 8; var->blue.offset = 0; var->blue.length = 8; } else return -EINVAL; var->transp.offset = 0; var->transp.length = 0; /* Enough video memory? */ if ((lx_get_pitch(var->xres, var->bits_per_pixel) * var->yres) > info->fix.smem_len) return -EINVAL; return 0; } static int lxfb_set_par(struct fb_info *info) { if (info->var.bits_per_pixel > 8) info->fix.visual = FB_VISUAL_TRUECOLOR; else info->fix.visual = FB_VISUAL_PSEUDOCOLOR; info->fix.line_length = lx_get_pitch(info->var.xres, info->var.bits_per_pixel); lx_set_mode(info); return 0; } static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) { chan &= 0xffff; chan >>= 16 - bf->length; return chan << bf->offset; } static int lxfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) { if (info->var.grayscale) { /* grayscale = 0.30*R + 0.59*G + 0.11*B */ red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8; } /* Truecolor has hardware independent palette */ if (info->fix.visual == FB_VISUAL_TRUECOLOR) { u32 *pal = info->pseudo_palette; u32 v; if (regno >= 16) return -EINVAL; v = chan_to_field(red, &info->var.red); v |= chan_to_field(green, &info->var.green); v |= chan_to_field(blue, &info->var.blue); pal[regno] = v; } else { if (regno >= 256) return -EINVAL; lx_set_palette_reg(info, regno, red, green, blue); } return 0; } static int lxfb_blank(int blank_mode, struct fb_info *info) { return lx_blank_display(info, blank_mode); } static int lxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev) { struct lxfb_par *par = info->par; int ret; ret = pci_enable_device(dev); if (ret) return ret; ret = pci_request_region(dev, 0, "lxfb-framebuffer"); if (ret) return ret; ret = pci_request_region(dev, 1, "lxfb-gp"); if (ret) return ret; ret = pci_request_region(dev, 2, "lxfb-vg"); if (ret) return ret; ret = pci_request_region(dev, 3, "lxfb-vp"); if (ret) return ret; info->fix.smem_start = pci_resource_start(dev, 0); info->fix.smem_len = vram ? vram : lx_framebuffer_size(); info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); ret = -ENOMEM; if (info->screen_base == NULL) return ret; par->gp_regs = pci_ioremap_bar(dev, 1); if (par->gp_regs == NULL) return ret; par->dc_regs = pci_ioremap_bar(dev, 2); if (par->dc_regs == NULL) return ret; par->vp_regs = pci_ioremap_bar(dev, 3); if (par->vp_regs == NULL) return ret; write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); write_dc(par, DC_GLIU0_MEM_OFFSET, info->fix.smem_start & 0xFF000000); write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); dev_info(&dev->dev, "%d KB of video memory at 0x%lx\n", info->fix.smem_len / 1024, info->fix.smem_start); return 0; } static const struct fb_ops lxfb_ops = { .owner = THIS_MODULE, .fb_check_var = lxfb_check_var, .fb_set_par = lxfb_set_par, .fb_setcolreg = lxfb_setcolreg, .fb_blank = lxfb_blank, /* No HW acceleration for now. */ .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, }; static struct fb_info *lxfb_init_fbinfo(struct device *dev) { struct lxfb_par *par; struct fb_info *info; /* Alloc enough space for the pseudo palette. */ info = framebuffer_alloc(sizeof(struct lxfb_par) + sizeof(u32) * 16, dev); if (!info) return NULL; par = info->par; strcpy(info->fix.id, "Geode LX"); info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.type_aux = 0; info->fix.xpanstep = 0; info->fix.ypanstep = 0; info->fix.ywrapstep = 0; info->fix.accel = FB_ACCEL_NONE; info->var.nonstd = 0; info->var.activate = FB_ACTIVATE_NOW; info->var.height = -1; info->var.width = -1; info->var.accel_flags = 0; info->var.vmode = FB_VMODE_NONINTERLACED; info->fbops = &lxfb_ops; info->flags = FBINFO_DEFAULT; info->node = -1; info->pseudo_palette = (void *)par + sizeof(struct lxfb_par); if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { framebuffer_release(info); return NULL; } info->var.grayscale = 0; return info; } static int __maybe_unused lxfb_suspend(struct device *dev) { struct fb_info *info = dev_get_drvdata(dev); console_lock(); lx_powerdown(info); fb_set_suspend(info, 1); console_unlock(); /* there's no point in setting PCI states; we emulate PCI, so * we don't end up getting power savings anyways */ return 0; } static int __maybe_unused lxfb_resume(struct device *dev) { struct fb_info *info = dev_get_drvdata(dev); int ret; console_lock(); ret = lx_powerup(info); if (ret) { printk(KERN_ERR "lxfb: power up failed!\n"); return ret; } fb_set_suspend(info, 0); console_unlock(); return 0; } static int lxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct lxfb_par *par; struct fb_info *info; int ret; struct fb_videomode *modedb_ptr; unsigned int modedb_size; ret = aperture_remove_conflicting_pci_devices(pdev, "lxfb"); if (ret) return ret; info = lxfb_init_fbinfo(&pdev->dev); if (info == NULL) return -ENOMEM; par = info->par; ret = lxfb_map_video_memory(info, pdev); if (ret < 0) { dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n"); goto err; } /* Set up the desired outputs */ par->output = 0; par->output |= (nopanel) ? 0 : OUTPUT_PANEL; par->output |= (nocrt) ? 0 : OUTPUT_CRT; /* Set up the mode database */ get_modedb(&modedb_ptr, &modedb_size); ret = fb_find_mode(&info->var, info, mode_option, modedb_ptr, modedb_size, NULL, 16); if (ret == 0 || ret == 4) { dev_err(&pdev->dev, "could not find valid video mode\n"); ret = -EINVAL; goto err; } /* Clear the screen of garbage, unless noclear was specified, * in which case we assume the user knows what he is doing */ if (!noclear) memset_io(info->screen_base, 0, info->fix.smem_len); /* Set the mode */ lxfb_check_var(&info->var, info); lxfb_set_par(info); pm_set_vt_switch(vt_switch); if (register_framebuffer(info) < 0) { ret = -EINVAL; goto err; } pci_set_drvdata(pdev, info); fb_info(info, "%s frame buffer device\n", info->fix.id); return 0; err: if (info->screen_base) { iounmap(info->screen_base); pci_release_region(pdev, 0); } if (par->gp_regs) { iounmap(par->gp_regs); pci_release_region(pdev, 1); } if (par->dc_regs) { iounmap(par->dc_regs); pci_release_region(pdev, 2); } if (par->vp_regs) { iounmap(par->vp_regs); pci_release_region(pdev, 3); } fb_dealloc_cmap(&info->cmap); framebuffer_release(info); return ret; } static void lxfb_remove(struct pci_dev *pdev) { struct fb_info *info = pci_get_drvdata(pdev); struct lxfb_par *par = info->par; unregister_framebuffer(info); iounmap(info->screen_base); pci_release_region(pdev, 0); iounmap(par->gp_regs); pci_release_region(pdev, 1); iounmap(par->dc_regs); pci_release_region(pdev, 2); iounmap(par->vp_regs); pci_release_region(pdev, 3); fb_dealloc_cmap(&info->cmap); framebuffer_release(info); } static struct pci_device_id lxfb_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LX_VIDEO) }, { 0, } }; MODULE_DEVICE_TABLE(pci, lxfb_id_table); static const struct dev_pm_ops lxfb_pm_ops = { #ifdef CONFIG_PM_SLEEP .suspend = lxfb_suspend, .resume = lxfb_resume, .freeze = NULL, .thaw = lxfb_resume, .poweroff = NULL, .restore = lxfb_resume, #endif }; static struct pci_driver lxfb_driver = { .name = "lxfb", .id_table = lxfb_id_table, .probe = lxfb_probe, .remove = lxfb_remove, .driver.pm = &lxfb_pm_ops, }; #ifndef MODULE static int __init lxfb_setup(char *options) { char *opt; if (!options || !*options) return 0; while ((opt = strsep(&options, ",")) != NULL) { if (!*opt) continue; if (!strcmp(opt, "noclear")) noclear = 1; else if (!strcmp(opt, "nopanel")) nopanel = 1; else if (!strcmp(opt, "nocrt")) nocrt = 1; else mode_option = opt; } return 0; } #endif static int __init lxfb_init(void) { #ifndef MODULE char *option = NULL; #endif if (fb_modesetting_disabled("lxfb")) return -ENODEV; #ifndef MODULE if (fb_get_options("lxfb", &option)) return -ENODEV; lxfb_setup(option); #endif return pci_register_driver(&lxfb_driver); } static void __exit lxfb_cleanup(void) { pci_unregister_driver(&lxfb_driver); } module_init(lxfb_init); module_exit(lxfb_cleanup); module_param(mode_option, charp, 0); MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])"); module_param(vram, int, 0); MODULE_PARM_DESC(vram, "video memory size"); module_param(vt_switch, int, 0); MODULE_PARM_DESC(vt_switch, "enable VT switch during suspend/resume"); MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode LX"); MODULE_LICENSE("GPL");