Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 305 insertions, 0 deletions

diff --git a/drivers/video/fbdev/dnfb.c b/drivers/video/fbdev/dnfb.c
new file mode 100644
index 0000000000..18405c402e
--- /dev/null
+++ b/drivers/video/fbdev/dnfb.c
@@ -0,0 +1,305 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/apollohw.h>
+#include <linux/fb.h>
+#include <linux/module.h>
+
+/* apollo video HW definitions */
+
+/*
+ * Control Registers.   IOBASE + $x
+ *
+ * Note: these are the Memory/IO BASE definitions for a mono card set to the
+ * alternate address
+ *
+ * Control 3A and 3B serve identical functions except that 3A
+ * deals with control 1 and 3b deals with Color LUT reg.
+ */
+
+#define AP_IOBASE       0x3b0	/* Base address of 1 plane board. */
+#define AP_STATUS       isaIO2mem(AP_IOBASE+0)	/* Status register.  Read */
+#define AP_WRITE_ENABLE isaIO2mem(AP_IOBASE+0)	/* Write Enable Register Write */
+#define AP_DEVICE_ID    isaIO2mem(AP_IOBASE+1)	/* Device ID Register. Read */
+#define AP_ROP_1        isaIO2mem(AP_IOBASE+2)	/* Raster Operation reg. Write Word */
+#define AP_DIAG_MEM_REQ isaIO2mem(AP_IOBASE+4)	/* Diagnostic Memory Request. Write Word */
+#define AP_CONTROL_0    isaIO2mem(AP_IOBASE+8)	/* Control Register 0.  Read/Write */
+#define AP_CONTROL_1    isaIO2mem(AP_IOBASE+0xa)	/* Control Register 1.  Read/Write */
+#define AP_CONTROL_3A   isaIO2mem(AP_IOBASE+0xe)	/* Control Register 3a. Read/Write */
+#define AP_CONTROL_2    isaIO2mem(AP_IOBASE+0xc)	/* Control Register 2. Read/Write */
+
+
+#define FRAME_BUFFER_START 0x0FA0000
+#define FRAME_BUFFER_LEN 0x40000
+
+/* CREG 0 */
+#define VECTOR_MODE 0x40	/* 010x.xxxx */
+#define DBLT_MODE   0x80	/* 100x.xxxx */
+#define NORMAL_MODE 0xE0	/* 111x.xxxx */
+#define SHIFT_BITS  0x1F	/* xxx1.1111 */
+	/* other bits are Shift value */
+
+/* CREG 1 */
+#define AD_BLT      0x80	/* 1xxx.xxxx */
+#define NORMAL      0x80 /* 1xxx.xxxx */	/* What is happening here ?? */
+#define INVERSE     0x00 /* 0xxx.xxxx */	/* Clearing this reverses the screen */
+#define PIX_BLT     0x00	/* 0xxx.xxxx */
+
+#define AD_HIBIT        0x40	/* xIxx.xxxx */
+
+#define ROP_EN          0x10	/* xxx1.xxxx */
+#define DST_EQ_SRC      0x00	/* xxx0.xxxx */
+#define nRESET_SYNC     0x08	/* xxxx.1xxx */
+#define SYNC_ENAB       0x02	/* xxxx.xx1x */
+
+#define BLANK_DISP      0x00	/* xxxx.xxx0 */
+#define ENAB_DISP       0x01	/* xxxx.xxx1 */
+
+#define NORM_CREG1      (nRESET_SYNC | SYNC_ENAB | ENAB_DISP)	/* no reset sync */
+
+/* CREG 2 */
+
+/*
+ * Following 3 defines are common to 1, 4 and 8 plane.
+ */
+
+#define S_DATA_1s   0x00 /* 00xx.xxxx */	/* set source to all 1's -- vector drawing */
+#define S_DATA_PIX  0x40 /* 01xx.xxxx */	/* takes source from ls-bits and replicates over 16 bits */
+#define S_DATA_PLN  0xC0 /* 11xx.xxxx */	/* normal, each data access =16-bits in
+						   one plane of image mem */
+
+/* CREG 3A/CREG 3B */
+#       define RESET_CREG 0x80	/* 1000.0000 */
+
+/* ROP REG  -  all one nibble */
+/*      ********* NOTE : this is used r0,r1,r2,r3 *********** */
+#define ROP(r2,r3,r0,r1) ( (U_SHORT)((r0)|((r1)<<4)|((r2)<<8)|((r3)<<12)) )
+#define DEST_ZERO               0x0
+#define SRC_AND_DEST    0x1
+#define SRC_AND_nDEST   0x2
+#define SRC                             0x3
+#define nSRC_AND_DEST   0x4
+#define DEST                    0x5
+#define SRC_XOR_DEST    0x6
+#define SRC_OR_DEST             0x7
+#define SRC_NOR_DEST    0x8
+#define SRC_XNOR_DEST   0x9
+#define nDEST                   0xA
+#define SRC_OR_nDEST    0xB
+#define nSRC                    0xC
+#define nSRC_OR_DEST    0xD
+#define SRC_NAND_DEST   0xE
+#define DEST_ONE                0xF
+
+#define SWAP(A) ((A>>8) | ((A&0xff) <<8))
+
+/* frame buffer operations */
+
+static int dnfb_blank(int blank, struct fb_info *info);
+static void dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
+
+static const struct fb_ops dn_fb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_blank	= dnfb_blank,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= dnfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+};
+
+static const struct fb_var_screeninfo dnfb_var = {
+	.xres		= 1280,
+	.yres		= 1024,
+	.xres_virtual	= 2048,
+	.yres_virtual	= 1024,
+	.bits_per_pixel	= 1,
+	.height		= -1,
+	.width		= -1,
+	.vmode		= FB_VMODE_NONINTERLACED,
+};
+
+static const struct fb_fix_screeninfo dnfb_fix = {
+	.id		= "Apollo Mono",
+	.smem_start	= (FRAME_BUFFER_START + IO_BASE),
+	.smem_len	= FRAME_BUFFER_LEN,
+	.type		= FB_TYPE_PACKED_PIXELS,
+	.visual		= FB_VISUAL_MONO10,
+	.line_length	= 256,
+};
+
+static int dnfb_blank(int blank, struct fb_info *info)
+{
+	if (blank)
+		out_8(AP_CONTROL_3A, 0x0);
+	else
+		out_8(AP_CONTROL_3A, 0x1);
+	return 0;
+}
+
+static
+void dnfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+
+	int incr, y_delta, pre_read = 0, x_end, x_word_count;
+	uint start_mask, end_mask, dest;
+	ushort *src, dummy;
+	short i, j;
+
+	incr = (area->dy <= area->sy) ? 1 : -1;
+
+	src = (ushort *)(info->screen_base + area->sy * info->fix.line_length +
+			(area->sx >> 4));
+	dest = area->dy * (info->fix.line_length >> 1) + (area->dx >> 4);
+
+	if (incr > 0) {
+		y_delta = (info->fix.line_length * 8) - area->sx - area->width;
+		x_end = area->dx + area->width - 1;
+		x_word_count = (x_end >> 4) - (area->dx >> 4) + 1;
+		start_mask = 0xffff0000 >> (area->dx & 0xf);
+		end_mask = 0x7ffff >> (x_end & 0xf);
+		out_8(AP_CONTROL_0,
+		     (((area->dx & 0xf) - (area->sx & 0xf)) % 16) | (0x4 << 5));
+		if ((area->dx & 0xf) < (area->sx & 0xf))
+			pre_read = 1;
+	} else {
+		y_delta = -((info->fix.line_length * 8) - area->sx - area->width);
+		x_end = area->dx - area->width + 1;
+		x_word_count = (area->dx >> 4) - (x_end >> 4) + 1;
+		start_mask = 0x7ffff >> (area->dx & 0xf);
+		end_mask = 0xffff0000 >> (x_end & 0xf);
+		out_8(AP_CONTROL_0,
+		     ((-((area->sx & 0xf) - (area->dx & 0xf))) % 16) |
+		     (0x4 << 5));
+		if ((area->dx & 0xf) > (area->sx & 0xf))
+			pre_read = 1;
+	}
+
+	for (i = 0; i < area->height; i++) {
+
+		out_8(AP_CONTROL_3A, 0xc | (dest >> 16));
+
+		if (pre_read) {
+			dummy = *src;
+			src += incr;
+		}
+
+		if (x_word_count) {
+			out_8(AP_WRITE_ENABLE, start_mask);
+			*src = dest;
+			src += incr;
+			dest += incr;
+			out_8(AP_WRITE_ENABLE, 0);
+
+			for (j = 1; j < (x_word_count - 1); j++) {
+				*src = dest;
+				src += incr;
+				dest += incr;
+			}
+
+			out_8(AP_WRITE_ENABLE, start_mask);
+			*src = dest;
+			dest += incr;
+			src += incr;
+		} else {
+			out_8(AP_WRITE_ENABLE, start_mask | end_mask);
+			*src = dest;
+			dest += incr;
+			src += incr;
+		}
+		src += (y_delta / 16);
+		dest += (y_delta / 16);
+	}
+	out_8(AP_CONTROL_0, NORMAL_MODE);
+}
+
+/*
+ * Initialization
+ */
+
+static int dnfb_probe(struct platform_device *dev)
+{
+	struct fb_info *info;
+	int err = 0;
+
+	info = framebuffer_alloc(0, &dev->dev);
+	if (!info)
+		return -ENOMEM;
+
+	info->fbops = &dn_fb_ops;
+	info->fix = dnfb_fix;
+	info->var = dnfb_var;
+	info->var.red.length = 1;
+	info->var.red.offset = 0;
+	info->var.green = info->var.blue = info->var.red;
+	info->screen_base = (u_char *) info->fix.smem_start;
+
+	err = fb_alloc_cmap(&info->cmap, 2, 0);
+	if (err < 0)
+		goto release_framebuffer;
+
+	err = register_framebuffer(info);
+	if (err < 0) {
+		fb_dealloc_cmap(&info->cmap);
+		goto release_framebuffer;
+	}
+	platform_set_drvdata(dev, info);
+
+	/* now we have registered we can safely setup the hardware */
+	out_8(AP_CONTROL_3A, RESET_CREG);
+	out_be16(AP_WRITE_ENABLE, 0x0);
+	out_8(AP_CONTROL_0, NORMAL_MODE);
+	out_8(AP_CONTROL_1, (AD_BLT | DST_EQ_SRC | NORM_CREG1));
+	out_8(AP_CONTROL_2, S_DATA_PLN);
+	out_be16(AP_ROP_1, SWAP(0x3));
+
+	printk("apollo frame buffer alive and kicking !\n");
+	return err;
+
+release_framebuffer:
+	framebuffer_release(info);
+	return err;
+}
+
+static struct platform_driver dnfb_driver = {
+	.probe	= dnfb_probe,
+	.driver	= {
+		.name	= "dnfb",
+	},
+};
+
+static struct platform_device dnfb_device = {
+	.name	= "dnfb",
+};
+
+static int __init dnfb_init(void)
+{
+	int ret;
+
+	if (!MACH_IS_APOLLO)
+		return -ENODEV;
+
+	if (fb_get_options("dnfb", NULL))
+		return -ENODEV;
+
+	ret = platform_driver_register(&dnfb_driver);
+
+	if (!ret) {
+		ret = platform_device_register(&dnfb_device);
+		if (ret)
+			platform_driver_unregister(&dnfb_driver);
+	}
+	return ret;
+}
+
+module_init(dnfb_init);
+
+MODULE_LICENSE("GPL");