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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/video/fbdev/maxinefb.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'drivers/video/fbdev/maxinefb.c')
| -rw-r--r-- | drivers/video/fbdev/maxinefb.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/video/fbdev/maxinefb.c b/drivers/video/fbdev/maxinefb.c new file mode 100644 index 000000000..52528eb4d --- /dev/null +++ b/drivers/video/fbdev/maxinefb.c @@ -0,0 +1,174 @@ +/* + * linux/drivers/video/maxinefb.c + * + * DECstation 5000/xx onboard framebuffer support ... derived from: + * "HP300 Topcat framebuffer support (derived from macfb of all things) + * Phil Blundell <philb@gnu.org> 1998", the original code can be + * found in the file hpfb.c in the same directory. + * + * DECstation related code Copyright (C) 1999,2000,2001 by + * Michael Engel <engel@unix-ag.org> and + * Karsten Merker <merker@linuxtag.org>. + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + */ + +/* + * Changes: + * 2001/01/27 removed debugging and testing code, fixed fb_ops + * initialization which had caused a crash before, + * general cleanup, first official release (KM) + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/fb.h> +#include <video/maxinefb.h> + +/* bootinfo.h defines the machine type values, needed when checking */ +/* whether are really running on a maxine, KM */ +#include <asm/bootinfo.h> + +static struct fb_info fb_info; + +static const struct fb_var_screeninfo maxinefb_defined = { + .xres = 1024, + .yres = 768, + .xres_virtual = 1024, + .yres_virtual = 768, + .bits_per_pixel =8, + .activate = FB_ACTIVATE_NOW, + .height = -1, + .width = -1, + .vmode = FB_VMODE_NONINTERLACED, +}; + +static struct fb_fix_screeninfo maxinefb_fix __initdata = { + .id = "Maxine", + .smem_len = (1024*768), + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_PSEUDOCOLOR, + .line_length = 1024, +}; + +/* Handle the funny Inmos RamDAC/video controller ... */ + +void maxinefb_ims332_write_register(int regno, register unsigned int val) +{ + register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS; + unsigned char *wptr; + + wptr = regs + 0xa0000 + (regno << 4); + *((volatile unsigned int *) (regs)) = (val >> 8) & 0xff00; + *((volatile unsigned short *) (wptr)) = val; +} + +unsigned int maxinefb_ims332_read_register(int regno) +{ + register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS; + unsigned char *rptr; + register unsigned int j, k; + + rptr = regs + 0x80000 + (regno << 4); + j = *((volatile unsigned short *) rptr); + k = *((volatile unsigned short *) regs); + + return (j & 0xffff) | ((k & 0xff00) << 8); +} + +/* Set the palette */ +static int maxinefb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, struct fb_info *info) +{ + /* value to be written into the palette reg. */ + unsigned long hw_colorvalue = 0; + + if (regno > 255) + return 1; + + red >>= 8; /* The cmap fields are 16 bits */ + green >>= 8; /* wide, but the harware colormap */ + blue >>= 8; /* registers are only 8 bits wide */ + + hw_colorvalue = (blue << 16) + (green << 8) + (red); + + maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE + regno, + hw_colorvalue); + return 0; +} + +static const struct fb_ops maxinefb_ops = { + .owner = THIS_MODULE, + FB_DEFAULT_IOMEM_OPS, + .fb_setcolreg = maxinefb_setcolreg, +}; + +int __init maxinefb_init(void) +{ + unsigned long fboff; + unsigned long fb_start; + int i; + + if (fb_get_options("maxinefb", NULL)) + return -ENODEV; + + /* Validate we're on the proper machine type */ + if (mips_machtype != MACH_DS5000_XX) { + return -EINVAL; + } + + printk(KERN_INFO "Maxinefb: Personal DECstation detected\n"); + printk(KERN_INFO "Maxinefb: initializing onboard framebuffer\n"); + + /* Framebuffer display memory base address */ + fb_start = DS5000_xx_ONBOARD_FBMEM_START; + + /* Clear screen */ + for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++) + *(volatile unsigned char *)fboff = 0x0; + + maxinefb_fix.smem_start = fb_start; + + /* erase hardware cursor */ + for (i = 0; i < 512; i++) { + maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i, + 0); + /* + if (i&0x8 == 0) + maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f); + else + maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0); + */ + } + + fb_info.fbops = &maxinefb_ops; + fb_info.screen_base = (char *)maxinefb_fix.smem_start; + fb_info.var = maxinefb_defined; + fb_info.fix = maxinefb_fix; + + fb_alloc_cmap(&fb_info.cmap, 256, 0); + + if (register_framebuffer(&fb_info) < 0) + return 1; + return 0; +} + +static void __exit maxinefb_exit(void) +{ + unregister_framebuffer(&fb_info); +} + +#ifdef MODULE +MODULE_LICENSE("GPL"); +#endif +module_init(maxinefb_init); +module_exit(maxinefb_exit); + |
