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-rw-r--r--drivers/video/dnfb.c381
1 files changed, 381 insertions, 0 deletions
diff --git a/drivers/video/dnfb.c b/drivers/video/dnfb.c
new file mode 100644
index 000000000..db0a6172f
--- /dev/null
+++ b/drivers/video/dnfb.c
@@ -0,0 +1,381 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+#include <linux/delay.h>
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/apollohw.h>
+#include <linux/fb.h>
+#include <linux/module.h>
+
+#include "fbcon-mfb.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 0x5d80 /* Base address of 1 plane board. */
+#define AP_STATUS 0x5d80 /* Status register. Read */
+#define AP_WRITE_ENABLE 0x5d80 /* Write Enable Register Write */
+#define AP_DEVICE_ID 0x5d81 /* Device ID Register. Read */
+#define AP_ROP_1 0x5d82 /* Raster Operation reg. Write Word */
+#define AP_DIAG_MEM_REQ 0x5d84 /* Diagnostic Memory Request. Write Word */
+#define AP_CONTROL_0 0x5d88 /* Control Register 0. Read/Write */
+#define AP_CONTROL_1 0x5d8a /* Control Register 1. Read/Write */
+#define AP_CONTROL_3A 0x5d8e /* Control Register 3a. Read/Write */
+#define AP_CONTROL_2 0x5d8c /* 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))
+
+#if 0
+#define outb(a,d) *(char *)(a)=(d)
+#define outw(a,d) *(unsigned short *)a=d
+#endif
+
+
+/* frame buffer operations */
+
+static int dnfb_open(struct fb_info *info);
+static int dnfb_release(struct fb_info *info);
+static int dnfb_get_fix(struct fb_fix_screeninfo *fix, int con,
+ struct fb_info *info);
+static int dnfb_get_var(struct fb_var_screeninfo *var, int con,
+ struct fb_info *info);
+static int dnfb_set_var(struct fb_var_screeninfo *var, int con,
+ struct fb_info *info);
+static int dnfb_get_cmap(struct fb_cmap *cmap,int kspc,int con,
+ struct fb_info *info);
+static int dnfb_set_cmap(struct fb_cmap *cmap,int kspc,int con,
+ struct fb_info *info);
+static int dnfb_pan_display(struct fb_var_screeninfo *var, int con,
+ struct fb_info *info);
+static int dnfb_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg, int con,
+ struct fb_info *info);
+
+static int dnfbcon_switch(int con, struct fb_info *info);
+static int dnfbcon_updatevar(int con, struct fb_info *info);
+static void dnfbcon_blank(int blank, struct fb_info *info);
+
+static void dnfb_set_disp(int con, struct fb_info *info);
+
+static struct display disp[MAX_NR_CONSOLES];
+static struct fb_info fb_info;
+static struct fb_ops dnfb_ops = {
+ dnfb_open,dnfb_release, dnfb_get_fix, dnfb_get_var, dnfb_set_var,
+ dnfb_get_cmap, dnfb_set_cmap, dnfb_pan_display, NULL, dnfb_ioctl
+};
+
+static int currcon=0;
+
+static char dnfb_name[]="Apollo";
+
+static int dnfb_open(struct fb_info *info)
+{
+ /*
+ * Nothing, only a usage count for the moment
+ */
+
+ MOD_INC_USE_COUNT;
+ return(0);
+}
+
+static int dnfb_release(struct fb_info *info)
+{
+ MOD_DEC_USE_COUNT;
+ return(0);
+}
+
+static int dnfb_get_fix(struct fb_fix_screeninfo *fix, int con,
+ struct fb_info *info)
+{
+ memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+ strcpy(fix->id,"Apollo Mono");
+ fix->smem_start=(char*)(FRAME_BUFFER_START+IO_BASE);
+ fix->smem_len=FRAME_BUFFER_LEN;
+ fix->type=FB_TYPE_PACKED_PIXELS;
+ fix->type_aux=0;
+ fix->visual=FB_VISUAL_MONO10;
+ fix->xpanstep=0;
+ fix->ypanstep=0;
+ fix->ywrapstep=0;
+ fix->line_length=256;
+
+ return 0;
+
+}
+
+static int dnfb_get_var(struct fb_var_screeninfo *var, int con,
+ struct fb_info *info)
+{
+ var->xres=1280;
+ var->yres=1024;
+ var->xres_virtual=2048;
+ var->yres_virtual=1024;
+ var->xoffset=0;
+ var->yoffset=0;
+ var->bits_per_pixel=1;
+ var->grayscale=0;
+ var->nonstd=0;
+ var->activate=0;
+ var->height=-1;
+ var->width=-1;
+ var->pixclock=0;
+ var->left_margin=0;
+ var->right_margin=0;
+ var->hsync_len=0;
+ var->vsync_len=0;
+ var->sync=0;
+ var->vmode=FB_VMODE_NONINTERLACED;
+ var->accel=FB_ACCEL_NONE;
+
+ return 0;
+
+}
+
+static int dnfb_set_var(struct fb_var_screeninfo *var, int con,
+ struct fb_info *info)
+{
+ if(var->xres!=1280)
+ return -EINVAL;
+ if(var->yres!=1024)
+ return -EINVAL;
+ if(var->xres_virtual!=2048)
+ return -EINVAL;
+ if(var->yres_virtual!=1024)
+ return -EINVAL;
+ if(var->xoffset!=0)
+ return -EINVAL;
+ if(var->yoffset!=0)
+ return -EINVAL;
+ if(var->bits_per_pixel!=1)
+ return -EINVAL;
+ if(var->grayscale!=0)
+ return -EINVAL;
+ if(var->nonstd!=0)
+ return -EINVAL;
+ if(var->activate!=0)
+ return -EINVAL;
+ if(var->pixclock!=0)
+ return -EINVAL;
+ if(var->left_margin!=0)
+ return -EINVAL;
+ if(var->right_margin!=0)
+ return -EINVAL;
+ if(var->hsync_len!=0)
+ return -EINVAL;
+ if(var->vsync_len!=0)
+ return -EINVAL;
+ if(var->sync!=0)
+ return -EINVAL;
+ if(var->vmode!=FB_VMODE_NONINTERLACED)
+ return -EINVAL;
+ if(var->accel!=FB_ACCEL_NONE)
+ return -EINVAL;
+
+ return 0;
+
+}
+
+static int dnfb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+ struct fb_info *info)
+{
+ printk("get cmap not supported\n");
+
+ return -EINVAL;
+}
+
+static int dnfb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
+ struct fb_info *info)
+{
+ printk("set cmap not supported\n");
+
+ return -EINVAL;
+
+}
+
+static int dnfb_pan_display(struct fb_var_screeninfo *var, int con,
+ struct fb_info *info)
+{
+ printk("panning not supported\n");
+
+ return -EINVAL;
+
+}
+
+static int dnfb_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg, int con,
+ struct fb_info *info)
+{
+ return -EINVAL;
+}
+
+static void dnfb_set_disp(int con, struct fb_info *info)
+{
+ struct fb_fix_screeninfo fix;
+
+ dnfb_get_fix(&fix, con, info);
+ if(con==-1)
+ con=0;
+
+ disp[con].screen_base = (u_char *)fix.smem_start;
+ disp[con].visual = fix.visual;
+ disp[con].type = fix.type;
+ disp[con].type_aux = fix.type_aux;
+ disp[con].ypanstep = fix.ypanstep;
+ disp[con].ywrapstep = fix.ywrapstep;
+ disp[con].can_soft_blank = 1;
+ disp[con].inverse = 0;
+ disp[con].line_length = fix.line_length;
+#ifdef CONFIG_FBCON_MFB
+ disp[con].dispsw = &fbcon_mfb;
+#else
+ disp[con].dispsw = NULL;
+#endif
+}
+
+unsigned long dnfb_init(unsigned long mem_start)
+{
+ int err;
+
+ fb_info.changevar=NULL;
+ strcpy(&fb_info.modename[0],dnfb_name);
+ fb_info.fontname[0]=0;
+ fb_info.disp=disp;
+ fb_info.switch_con=&dnfbcon_switch;
+ fb_info.updatevar=&dnfbcon_updatevar;
+ fb_info.blank=&dnfbcon_blank;
+ fb_info.node = -1;
+ fb_info.fbops = &dnfb_ops;
+
+ err=register_framebuffer(&fb_info);
+ if(err < 0) {
+ panic("unable to register apollo frame buffer\n");
+ }
+
+ /* now we have registered we can safely setup the hardware */
+
+ outb(RESET_CREG, AP_CONTROL_3A);
+ outw(0x0, AP_WRITE_ENABLE);
+ outb(NORMAL_MODE,AP_CONTROL_0);
+ outb((AD_BLT | DST_EQ_SRC | NORM_CREG1), AP_CONTROL_1);
+ outb(S_DATA_PLN, AP_CONTROL_2);
+ outw(SWAP(0x3),AP_ROP_1);
+
+ printk("fb%d: apollo frame buffer alive and kicking !\n",
+ GET_FB_IDX(fb_info.node));
+
+
+ dnfb_get_var(&disp[0].var, 0, &fb_info);
+
+ dnfb_set_disp(-1, &fb_info);
+
+ return mem_start;
+
+}
+
+
+static int dnfbcon_switch(int con, struct fb_info *info)
+{
+ currcon=con;
+
+ return 0;
+
+}
+
+static int dnfbcon_updatevar(int con, struct fb_info *info)
+{
+ return 0;
+}
+
+static void dnfbcon_blank(int blank, struct fb_info *info)
+{
+ if(blank) {
+ outb(0, AP_CONTROL_3A);
+ outb((AD_BLT | DST_EQ_SRC | NORM_CREG1) & ~ENAB_DISP,
+ AP_CONTROL_1);
+ }
+ else {
+ outb(1, AP_CONTROL_3A);
+ outb((AD_BLT | DST_EQ_SRC | NORM_CREG1), AP_CONTROL_1);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 07:43:42 +0000