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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/video/fbdev/maxinefb.c
downloadlinux-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.c174
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);
+