patch-2.1.79 linux/drivers/macintosh/chips.c

• Lines: 168
• Date: Mon Jan 12 15:18:13 1998
• Orig file: v2.1.78/linux/drivers/macintosh/chips.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.78/linux/drivers/macintosh/chips.c linux/drivers/macintosh/chips.c
@@ -0,0 +1,167 @@
+/*
+ * chips.c: Console support for PowerBook 3400/2400 chips65550 display adaptor.
+ *
+ * Copyright (C) 1997 Fabio Riccardi.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/vc_ioctl.h>
+#include <linux/pci.h>
+#include <linux/bios32.h>
+#include <linux/selection.h>
+#include <asm/prom.h>
+#include <asm/io.h>
+#include <asm/pci-bridge.h>
+#include "pmac-cons.h"
+#include "chips.h"
+
+
+static unsigned char *frame_buffer;
+static unsigned char *blitter_regs;
+static unsigned char *io_space;
+
+void
+map_chips_display(struct device_node *dp)
+{
+    unsigned char bus, devfn;
+    unsigned short cmd;
+    unsigned long addr;
+
+    addr = dp->addrs[0].address;
+    frame_buffer = ioremap(addr + 0x800000, 0x100000);
+    blitter_regs = ioremap(addr + 0xC00000, 4096);
+    
+    printk("Mapped chips65550 frame buffer at %p, blitter at %p\n", frame_buffer, blitter_regs);
+    
+    if (pci_device_loc(dp, &bus, &devfn) == 0) {
+	pcibios_read_config_word(bus, devfn, PCI_COMMAND, &cmd);
+	cmd |= 3;	// enable memory and IO space
+	pcibios_write_config_word(bus, devfn, PCI_COMMAND, cmd);
+	io_space = ioremap((unsigned long) pci_io_base(bus), 4096);
+	printk("Mapped chips65550 IO space at %p\n", io_space);
+    }
+
+    video_mode = VMODE_800_600_60;
+    color_mode = CMODE_8;
+}
+
+#define write_xr(num,val)	{ out_8(io_space + 0x3D6, num); out_8(io_space + 0x3D7, val); }
+#define read_xr(num,var)	{ out_8(io_space + 0x3D6, num); var = in_8(io_space + 0x3D7); }
+#define write_fr(num,val)	{ out_8(io_space + 0x3D0, num); out_8(io_space + 0x3D1, val); }
+#define read_fr(num,var)	{ out_8(io_space + 0x3D0, num); var = in_8(io_space + 0x3D1); }
+#define write_cr(num,val)	{ out_8(io_space + 0x3D4, num); out_8(io_space + 0x3D5, val); }
+#define read_cr(num,var)	{ out_8(io_space + 0x3D4, num); var = in_8(io_space + 0x3D5); }
+
+void
+chips_init()
+{
+    unsigned *p;
+    int i, hres;
+
+    if (video_mode != VMODE_800_600_60)
+	panic("chips65550: display mode %d not supported", video_mode);
+
+    if (color_mode != CMODE_8 && color_mode != CMODE_16)
+	panic("chips65550: color mode %d not supported", color_mode);
+    
+    n_scanlines = 600;
+    hres        = 800;
+    pixel_size  = 1 << color_mode;
+    line_pitch  = hres * pixel_size;
+    row_pitch = line_pitch * 16;
+
+    if (color_mode == CMODE_16) {
+	write_cr(0x13, 200);		// 16 bit display width (decimal)
+	write_xr(0x81, 0x14);		// 15 bit (TrueColor) color mode
+	write_xr(0x82, 0x00);		// disable palettes
+	write_xr(0x20, 0x10);		// 16 bit blitter mode
+	// write_xr(0x80, 0x00);	// 6 bit DAC
+	// write_fr(0x11, 0X50);	// No dither, 5 bits/color
+    } else if (color_mode == CMODE_8) {
+	write_cr(0x13, 100);		// 8 bit display width (decimal)
+	write_xr(0x81, 0x12);		// 8 bit color mode
+	write_xr(0x82, 0x08);		// Graphics gamma enable
+	write_xr(0x20, 0x00);		// 8 bit blitter mode
+	// write_xr(0x80, 0x82);	// 8 bit DAC, CRT overscan
+	// write_fr(0x11, 0XE0);	// Res Dither on, 6 bits/pixel
+    }
+
+    pmac_init_palette();	/* Initialize colormap */
+
+    fb_start = frame_buffer;
+
+    printk(KERN_INFO "hres = %d height = %d pitch = %d\n",
+	   hres, n_scanlines, line_pitch);
+
+    display_info.height = n_scanlines;
+    display_info.width = hres;
+    display_info.depth = pixel_size * 8;
+    display_info.pitch = line_pitch;
+    display_info.mode = video_mode;
+    strncpy(display_info.name, "chips65550", sizeof(display_info.name));
+    display_info.fb_address = (unsigned long) frame_buffer;
+    display_info.cmap_adr_address = 0;
+    display_info.cmap_data_address = 0;
+    display_info.disp_reg_address = 0;
+
+    /* Clear screen */
+    p = (unsigned *) frame_buffer;
+    for (i = n_scanlines * line_pitch / sizeof(unsigned); i != 0; --i)
+	*p++ = 0;
+}
+
+int
+chips_setmode(struct vc_mode *mode, int doit)
+{
+    int cmode;
+
+    switch (mode->depth) {
+    case 16:
+	cmode = CMODE_16;
+	break;
+    case 8:
+    case 0:		/* (default) */
+	cmode = CMODE_8;
+	break;
+    default:
+	return -EINVAL;
+    }
+
+    if (mode->mode != VMODE_800_600_60)
+	return -EINVAL;
+    
+    if (doit) {
+	video_mode = mode->mode;
+	color_mode = cmode;
+	chips_init();
+    }
+
+    return 0;
+}
+
+void
+chips_set_palette(unsigned char red[], unsigned char green[],
+		  unsigned char blue[], int index, int ncolors)
+{
+    int i;
+
+    for (i = 0; i < ncolors; ++i) {
+	out_8(&io_space[0x3C8], index + i);
+	udelay(1);
+	out_8(&io_space[0x3C9], red[i]);
+	out_8(&io_space[0x3C9], green[i]);
+	out_8(&io_space[0x3C9], blue[i]);
+    }
+}
+
+void
+chips_set_blanking(int blank_mode)
+{
+}