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path: root/drivers/video/fbdev/dnfb.c
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Diffstat (limited to 'drivers/video/fbdev/dnfb.c')
-rw-r--r--drivers/video/fbdev/dnfb.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/drivers/video/fbdev/dnfb.c b/drivers/video/fbdev/dnfb.c
new file mode 100644
index 00000000000..3526899da61
--- /dev/null
+++ b/drivers/video/fbdev/dnfb.c
@@ -0,0 +1,303 @@
+#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 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,
+};
+
+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 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) {
+ framebuffer_release(info);
+ return err;
+ }
+
+ err = register_framebuffer(info);
+ if (err < 0) {
+ fb_dealloc_cmap(&info->cmap);
+ framebuffer_release(info);
+ return err;
+ }
+ 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;
+}
+
+static struct platform_driver dnfb_driver = {
+ .probe = dnfb_probe,
+ .driver = {
+ .name = "dnfb",
+ },
+};
+
+static struct platform_device dnfb_device = {
+ .name = "dnfb",
+};
+
+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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:37:07 +0000