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-rw-r--r--drivers/video/asiliantfb.c617
1 files changed, 617 insertions, 0 deletions
diff --git a/drivers/video/asiliantfb.c b/drivers/video/asiliantfb.c
new file mode 100644
index 00000000000..f4729f4df8c
--- /dev/null
+++ b/drivers/video/asiliantfb.c
@@ -0,0 +1,617 @@
+/*
+ * drivers/video/asiliantfb.c
+ * frame buffer driver for Asiliant 69000 chip
+ * Copyright (C) 2001-2003 Saito.K & Jeanne
+ *
+ * from driver/video/chipsfb.c and,
+ *
+ * drivers/video/asiliantfb.c -- frame buffer device for
+ * Asiliant 69030 chip (formerly Intel, formerly Chips & Technologies)
+ * Author: apc@agelectronics.co.uk
+ * Copyright (C) 2000 AG Electronics
+ * Note: the data sheets don't seem to be available from Asiliant.
+ * They are available by searching developer.intel.com, but are not otherwise
+ * linked to.
+ *
+ * This driver should be portable with minimal effort to the 69000 display
+ * chip, and to the twin-display mode of the 69030.
+ * Contains code from Thomas Hhenleitner <th@visuelle-maschinen.de> (thanks)
+ *
+ * Derived from the CT65550 driver chipsfb.c:
+ * Copyright (C) 1998 Paul Mackerras
+ * ...which was derived from the Powermac "chips" driver:
+ * Copyright (C) 1997 Fabio Riccardi.
+ * And from the frame buffer device for Open Firmware-initialized devices:
+ * Copyright (C) 1997 Geert Uytterhoeven.
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+
+/* Built in clock of the 69030 */
+static const unsigned Fref = 14318180;
+
+#define mmio_base (p->screen_base + 0x400000)
+
+#define mm_write_ind(num, val, ap, dp) do { \
+ writeb((num), mmio_base + (ap)); writeb((val), mmio_base + (dp)); \
+} while (0)
+
+static void mm_write_xr(struct fb_info *p, u8 reg, u8 data)
+{
+ mm_write_ind(reg, data, 0x7ac, 0x7ad);
+}
+#define write_xr(num, val) mm_write_xr(p, num, val)
+
+static void mm_write_fr(struct fb_info *p, u8 reg, u8 data)
+{
+ mm_write_ind(reg, data, 0x7a0, 0x7a1);
+}
+#define write_fr(num, val) mm_write_fr(p, num, val)
+
+static void mm_write_cr(struct fb_info *p, u8 reg, u8 data)
+{
+ mm_write_ind(reg, data, 0x7a8, 0x7a9);
+}
+#define write_cr(num, val) mm_write_cr(p, num, val)
+
+static void mm_write_gr(struct fb_info *p, u8 reg, u8 data)
+{
+ mm_write_ind(reg, data, 0x79c, 0x79d);
+}
+#define write_gr(num, val) mm_write_gr(p, num, val)
+
+static void mm_write_sr(struct fb_info *p, u8 reg, u8 data)
+{
+ mm_write_ind(reg, data, 0x788, 0x789);
+}
+#define write_sr(num, val) mm_write_sr(p, num, val)
+
+static void mm_write_ar(struct fb_info *p, u8 reg, u8 data)
+{
+ readb(mmio_base + 0x7b4);
+ mm_write_ind(reg, data, 0x780, 0x780);
+}
+#define write_ar(num, val) mm_write_ar(p, num, val)
+
+static int asiliantfb_pci_init(struct pci_dev *dp, const struct pci_device_id *);
+static int asiliantfb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+static int asiliantfb_set_par(struct fb_info *info);
+static int asiliantfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int transp, struct fb_info *info);
+
+static struct fb_ops asiliantfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = asiliantfb_check_var,
+ .fb_set_par = asiliantfb_set_par,
+ .fb_setcolreg = asiliantfb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_cursor = soft_cursor,
+};
+
+/* Calculate the ratios for the dot clocks without using a single long long
+ * value */
+static void asiliant_calc_dclk2(u32 *ppixclock, u8 *dclk2_m, u8 *dclk2_n, u8 *dclk2_div)
+{
+ unsigned pixclock = *ppixclock;
+ unsigned Ftarget = 1000000 * (1000000 / pixclock);
+ unsigned n;
+ unsigned best_error = 0xffffffff;
+ unsigned best_m = 0xffffffff,
+ best_n = 0xffffffff;
+ unsigned ratio;
+ unsigned remainder;
+ unsigned char divisor = 0;
+
+ /* Calculate the frequency required. This is hard enough. */
+ ratio = 1000000 / pixclock;
+ remainder = 1000000 % pixclock;
+ Ftarget = 1000000 * ratio + (1000000 * remainder) / pixclock;
+
+ while (Ftarget < 100000000) {
+ divisor += 0x10;
+ Ftarget <<= 1;
+ }
+
+ ratio = Ftarget / Fref;
+ remainder = Ftarget % Fref;
+
+ /* This expresses the constraint that 150kHz <= Fref/n <= 5Mhz,
+ * together with 3 <= n <= 257. */
+ for (n = 3; n <= 257; n++) {
+ unsigned m = n * ratio + (n * remainder) / Fref;
+
+ /* 3 <= m <= 257 */
+ if (m >= 3 && m <= 257) {
+ unsigned new_error = ((Ftarget * n) - (Fref * m)) >= 0 ?
+ ((Ftarget * n) - (Fref * m)) : ((Fref * m) - (Ftarget * n));
+ if (new_error < best_error) {
+ best_n = n;
+ best_m = m;
+ best_error = new_error;
+ }
+ }
+ /* But if VLD = 4, then 4m <= 1028 */
+ else if (m <= 1028) {
+ /* remember there are still only 8-bits of precision in m, so
+ * avoid over-optimistic error calculations */
+ unsigned new_error = ((Ftarget * n) - (Fref * (m & ~3))) >= 0 ?
+ ((Ftarget * n) - (Fref * (m & ~3))) : ((Fref * (m & ~3)) - (Ftarget * n));
+ if (new_error < best_error) {
+ best_n = n;
+ best_m = m;
+ best_error = new_error;
+ }
+ }
+ }
+ if (best_m > 257)
+ best_m >>= 2; /* divide m by 4, and leave VCO loop divide at 4 */
+ else
+ divisor |= 4; /* or set VCO loop divide to 1 */
+ *dclk2_m = best_m - 2;
+ *dclk2_n = best_n - 2;
+ *dclk2_div = divisor;
+ *ppixclock = pixclock;
+ return;
+}
+
+static void asiliant_set_timing(struct fb_info *p)
+{
+ unsigned hd = p->var.xres / 8;
+ unsigned hs = (p->var.xres + p->var.right_margin) / 8;
+ unsigned he = (p->var.xres + p->var.right_margin + p->var.hsync_len) / 8;
+ unsigned ht = (p->var.left_margin + p->var.xres + p->var.right_margin + p->var.hsync_len) / 8;
+ unsigned vd = p->var.yres;
+ unsigned vs = p->var.yres + p->var.lower_margin;
+ unsigned ve = p->var.yres + p->var.lower_margin + p->var.vsync_len;
+ unsigned vt = p->var.upper_margin + p->var.yres + p->var.lower_margin + p->var.vsync_len;
+ unsigned wd = (p->var.xres_virtual * ((p->var.bits_per_pixel+7)/8)) / 8;
+
+ if ((p->var.xres == 640) && (p->var.yres == 480) && (p->var.pixclock == 39722)) {
+ write_fr(0x01, 0x02); /* LCD */
+ } else {
+ write_fr(0x01, 0x01); /* CRT */
+ }
+
+ write_cr(0x11, (ve - 1) & 0x0f);
+ write_cr(0x00, (ht - 5) & 0xff);
+ write_cr(0x01, hd - 1);
+ write_cr(0x02, hd);
+ write_cr(0x03, ((ht - 1) & 0x1f) | 0x80);
+ write_cr(0x04, hs);
+ write_cr(0x05, (((ht - 1) & 0x20) <<2) | (he & 0x1f));
+ write_cr(0x3c, (ht - 1) & 0xc0);
+ write_cr(0x06, (vt - 2) & 0xff);
+ write_cr(0x30, (vt - 2) >> 8);
+ write_cr(0x07, 0x00);
+ write_cr(0x08, 0x00);
+ write_cr(0x09, 0x00);
+ write_cr(0x10, (vs - 1) & 0xff);
+ write_cr(0x32, ((vs - 1) >> 8) & 0xf);
+ write_cr(0x11, ((ve - 1) & 0x0f) | 0x80);
+ write_cr(0x12, (vd - 1) & 0xff);
+ write_cr(0x31, ((vd - 1) & 0xf00) >> 8);
+ write_cr(0x13, wd & 0xff);
+ write_cr(0x41, (wd & 0xf00) >> 8);
+ write_cr(0x15, (vs - 1) & 0xff);
+ write_cr(0x33, ((vs - 1) >> 8) & 0xf);
+ write_cr(0x38, ((ht - 5) & 0x100) >> 8);
+ write_cr(0x16, (vt - 1) & 0xff);
+ write_cr(0x18, 0x00);
+
+ if (p->var.xres == 640) {
+ writeb(0xc7, mmio_base + 0x784); /* set misc output reg */
+ } else {
+ writeb(0x07, mmio_base + 0x784); /* set misc output reg */
+ }
+}
+
+static int asiliantfb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *p)
+{
+ unsigned long Ftarget, ratio, remainder;
+
+ ratio = 1000000 / var->pixclock;
+ remainder = 1000000 % var->pixclock;
+ Ftarget = 1000000 * ratio + (1000000 * remainder) / var->pixclock;
+
+ /* First check the constraint that the maximum post-VCO divisor is 32,
+ * and the maximum Fvco is 220MHz */
+ if (Ftarget > 220000000 || Ftarget < 3125000) {
+ printk(KERN_ERR "asiliantfb dotclock must be between 3.125 and 220MHz\n");
+ return -ENXIO;
+ }
+ var->xres_virtual = var->xres;
+ var->yres_virtual = var->yres;
+
+ if (var->bits_per_pixel == 24) {
+ var->red.offset = 16;
+ var->green.offset = 8;
+ var->blue.offset = 0;
+ var->red.length = var->blue.length = var->green.length = 8;
+ } else if (var->bits_per_pixel == 16) {
+ switch (var->red.offset) {
+ case 11:
+ var->green.length = 6;
+ break;
+ case 10:
+ var->green.length = 5;
+ break;
+ default:
+ return -EINVAL;
+ }
+ var->green.offset = 5;
+ var->blue.offset = 0;
+ var->red.length = var->blue.length = 5;
+ } else if (var->bits_per_pixel == 8) {
+ var->red.offset = var->green.offset = var->blue.offset = 0;
+ var->red.length = var->green.length = var->blue.length = 8;
+ }
+ return 0;
+}
+
+static int asiliantfb_set_par(struct fb_info *p)
+{
+ u8 dclk2_m; /* Holds m-2 value for register */
+ u8 dclk2_n; /* Holds n-2 value for register */
+ u8 dclk2_div; /* Holds divisor bitmask */
+
+ /* Set pixclock */
+ asiliant_calc_dclk2(&p->var.pixclock, &dclk2_m, &dclk2_n, &dclk2_div);
+
+ /* Set color depth */
+ if (p->var.bits_per_pixel == 24) {
+ write_xr(0x81, 0x16); /* 24 bit packed color mode */
+ write_xr(0x82, 0x00); /* Disable palettes */
+ write_xr(0x20, 0x20); /* 24 bit blitter mode */
+ } else if (p->var.bits_per_pixel == 16) {
+ if (p->var.red.offset == 11)
+ write_xr(0x81, 0x15); /* 16 bit color mode */
+ else
+ write_xr(0x81, 0x14); /* 15 bit color mode */
+ write_xr(0x82, 0x00); /* Disable palettes */
+ write_xr(0x20, 0x10); /* 16 bit blitter mode */
+ } else if (p->var.bits_per_pixel == 8) {
+ write_xr(0x0a, 0x02); /* Linear */
+ write_xr(0x81, 0x12); /* 8 bit color mode */
+ write_xr(0x82, 0x00); /* Graphics gamma enable */
+ write_xr(0x20, 0x00); /* 8 bit blitter mode */
+ }
+ p->fix.line_length = p->var.xres * (p->var.bits_per_pixel >> 3);
+ p->fix.visual = (p->var.bits_per_pixel == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+ write_xr(0xc4, dclk2_m);
+ write_xr(0xc5, dclk2_n);
+ write_xr(0xc7, dclk2_div);
+ /* Set up the CR registers */
+ asiliant_set_timing(p);
+ return 0;
+}
+
+static int asiliantfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int transp, struct fb_info *p)
+{
+ if (regno > 255)
+ return 1;
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+
+ /* Set hardware palete */
+ writeb(regno, mmio_base + 0x790);
+ udelay(1);
+ writeb(red, mmio_base + 0x791);
+ writeb(green, mmio_base + 0x791);
+ writeb(blue, mmio_base + 0x791);
+
+ switch(p->var.bits_per_pixel) {
+ case 15:
+ if (regno < 16) {
+ ((u32 *)(p->pseudo_palette))[regno] =
+ ((red & 0xf8) << 7) |
+ ((green & 0xf8) << 2) |
+ ((blue & 0xf8) >> 3);
+ }
+ break;
+ case 16:
+ if (regno < 16) {
+ ((u32 *)(p->pseudo_palette))[regno] =
+ ((red & 0xf8) << 8) |
+ ((green & 0xfc) << 3) |
+ ((blue & 0xf8) >> 3);
+ }
+ break;
+ case 24:
+ if (regno < 24) {
+ ((u32 *)(p->pseudo_palette))[regno] =
+ (red << 16) |
+ (green << 8) |
+ (blue);
+ }
+ break;
+ }
+ return 0;
+}
+
+struct chips_init_reg {
+ unsigned char addr;
+ unsigned char data;
+};
+
+#define N_ELTS(x) (sizeof(x) / sizeof(x[0]))
+
+static struct chips_init_reg chips_init_sr[] =
+{
+ {0x00, 0x03}, /* Reset register */
+ {0x01, 0x01}, /* Clocking mode */
+ {0x02, 0x0f}, /* Plane mask */
+ {0x04, 0x0e} /* Memory mode */
+};
+
+static struct chips_init_reg chips_init_gr[] =
+{
+ {0x03, 0x00}, /* Data rotate */
+ {0x05, 0x00}, /* Graphics mode */
+ {0x06, 0x01}, /* Miscellaneous */
+ {0x08, 0x00} /* Bit mask */
+};
+
+static struct chips_init_reg chips_init_ar[] =
+{
+ {0x10, 0x01}, /* Mode control */
+ {0x11, 0x00}, /* Overscan */
+ {0x12, 0x0f}, /* Memory plane enable */
+ {0x13, 0x00} /* Horizontal pixel panning */
+};
+
+static struct chips_init_reg chips_init_cr[] =
+{
+ {0x0c, 0x00}, /* Start address high */
+ {0x0d, 0x00}, /* Start address low */
+ {0x40, 0x00}, /* Extended Start Address */
+ {0x41, 0x00}, /* Extended Start Address */
+ {0x14, 0x00}, /* Underline location */
+ {0x17, 0xe3}, /* CRT mode control */
+ {0x70, 0x00} /* Interlace control */
+};
+
+
+static struct chips_init_reg chips_init_fr[] =
+{
+ {0x01, 0x02},
+ {0x03, 0x08},
+ {0x08, 0xcc},
+ {0x0a, 0x08},
+ {0x18, 0x00},
+ {0x1e, 0x80},
+ {0x40, 0x83},
+ {0x41, 0x00},
+ {0x48, 0x13},
+ {0x4d, 0x60},
+ {0x4e, 0x0f},
+
+ {0x0b, 0x01},
+
+ {0x21, 0x51},
+ {0x22, 0x1d},
+ {0x23, 0x5f},
+ {0x20, 0x4f},
+ {0x34, 0x00},
+ {0x24, 0x51},
+ {0x25, 0x00},
+ {0x27, 0x0b},
+ {0x26, 0x00},
+ {0x37, 0x80},
+ {0x33, 0x0b},
+ {0x35, 0x11},
+ {0x36, 0x02},
+ {0x31, 0xea},
+ {0x32, 0x0c},
+ {0x30, 0xdf},
+ {0x10, 0x0c},
+ {0x11, 0xe0},
+ {0x12, 0x50},
+ {0x13, 0x00},
+ {0x16, 0x03},
+ {0x17, 0xbd},
+ {0x1a, 0x00},
+};
+
+
+static struct chips_init_reg chips_init_xr[] =
+{
+ {0xce, 0x00}, /* set default memory clock */
+ {0xcc, 200 }, /* MCLK ratio M */
+ {0xcd, 18 }, /* MCLK ratio N */
+ {0xce, 0x90}, /* MCLK divisor = 2 */
+
+ {0xc4, 209 },
+ {0xc5, 118 },
+ {0xc7, 32 },
+ {0xcf, 0x06},
+ {0x09, 0x01}, /* IO Control - CRT controller extensions */
+ {0x0a, 0x02}, /* Frame buffer mapping */
+ {0x0b, 0x01}, /* PCI burst write */
+ {0x40, 0x03}, /* Memory access control */
+ {0x80, 0x82}, /* Pixel pipeline configuration 0 */
+ {0x81, 0x12}, /* Pixel pipeline configuration 1 */
+ {0x82, 0x08}, /* Pixel pipeline configuration 2 */
+
+ {0xd0, 0x0f},
+ {0xd1, 0x01},
+};
+
+static void __devinit chips_hw_init(struct fb_info *p)
+{
+ int i;
+
+ for (i = 0; i < N_ELTS(chips_init_xr); ++i)
+ write_xr(chips_init_xr[i].addr, chips_init_xr[i].data);
+ write_xr(0x81, 0x12);
+ write_xr(0x82, 0x08);
+ write_xr(0x20, 0x00);
+ for (i = 0; i < N_ELTS(chips_init_sr); ++i)
+ write_sr(chips_init_sr[i].addr, chips_init_sr[i].data);
+ for (i = 0; i < N_ELTS(chips_init_gr); ++i)
+ write_gr(chips_init_gr[i].addr, chips_init_gr[i].data);
+ for (i = 0; i < N_ELTS(chips_init_ar); ++i)
+ write_ar(chips_init_ar[i].addr, chips_init_ar[i].data);
+ /* Enable video output in attribute index register */
+ writeb(0x20, mmio_base + 0x780);
+ for (i = 0; i < N_ELTS(chips_init_cr); ++i)
+ write_cr(chips_init_cr[i].addr, chips_init_cr[i].data);
+ for (i = 0; i < N_ELTS(chips_init_fr); ++i)
+ write_fr(chips_init_fr[i].addr, chips_init_fr[i].data);
+}
+
+static struct fb_fix_screeninfo asiliantfb_fix __devinitdata = {
+ .id = "Asiliant 69000",
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_PSEUDOCOLOR,
+ .accel = FB_ACCEL_NONE,
+ .line_length = 640,
+ .smem_len = 0x200000, /* 2MB */
+};
+
+static struct fb_var_screeninfo asiliantfb_var __devinitdata = {
+ .xres = 640,
+ .yres = 480,
+ .xres_virtual = 640,
+ .yres_virtual = 480,
+ .bits_per_pixel = 8,
+ .red = { .length = 8 },
+ .green = { .length = 8 },
+ .blue = { .length = 8 },
+ .height = -1,
+ .width = -1,
+ .vmode = FB_VMODE_NONINTERLACED,
+ .pixclock = 39722,
+ .left_margin = 48,
+ .right_margin = 16,
+ .upper_margin = 33,
+ .lower_margin = 10,
+ .hsync_len = 96,
+ .vsync_len = 2,
+};
+
+static void __devinit init_asiliant(struct fb_info *p, unsigned long addr)
+{
+ p->fix = asiliantfb_fix;
+ p->fix.smem_start = addr;
+ p->var = asiliantfb_var;
+ p->fbops = &asiliantfb_ops;
+ p->flags = FBINFO_DEFAULT;
+
+ fb_alloc_cmap(&p->cmap, 256, 0);
+
+ if (register_framebuffer(p) < 0) {
+ printk(KERN_ERR "C&T 69000 framebuffer failed to register\n");
+ return;
+ }
+
+ printk(KERN_INFO "fb%d: Asiliant 69000 frame buffer (%dK RAM detected)\n",
+ p->node, p->fix.smem_len / 1024);
+
+ writeb(0xff, mmio_base + 0x78c);
+ chips_hw_init(p);
+}
+
+static int __devinit
+asiliantfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
+{
+ unsigned long addr, size;
+ struct fb_info *p;
+
+ if ((dp->resource[0].flags & IORESOURCE_MEM) == 0)
+ return -ENODEV;
+ addr = pci_resource_start(dp, 0);
+ size = pci_resource_len(dp, 0);
+ if (addr == 0)
+ return -ENODEV;
+ if (!request_mem_region(addr, size, "asiliantfb"))
+ return -EBUSY;
+
+ p = framebuffer_alloc(sizeof(u32) * 256, &dp->dev);
+ if (!p) {
+ release_mem_region(addr, size);
+ return -ENOMEM;
+ }
+ p->pseudo_palette = p->par;
+ p->par = NULL;
+
+ p->screen_base = ioremap(addr, 0x800000);
+ if (p->screen_base == NULL) {
+ release_mem_region(addr, size);
+ framebuffer_release(p);
+ return -ENOMEM;
+ }
+
+ pci_write_config_dword(dp, 4, 0x02800083);
+ writeb(3, p->screen_base + 0x400784);
+
+ init_asiliant(p, addr);
+
+ pci_set_drvdata(dp, p);
+ return 0;
+}
+
+static void __devexit asiliantfb_remove(struct pci_dev *dp)
+{
+ struct fb_info *p = pci_get_drvdata(dp);
+
+ unregister_framebuffer(p);
+ iounmap(p->screen_base);
+ release_mem_region(pci_resource_start(dp, 0), pci_resource_len(dp, 0));
+ pci_set_drvdata(dp, NULL);
+ framebuffer_release(p);
+}
+
+static struct pci_device_id asiliantfb_pci_tbl[] __devinitdata = {
+ { PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_69000, PCI_ANY_ID, PCI_ANY_ID },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, asiliantfb_pci_tbl);
+
+static struct pci_driver asiliantfb_driver = {
+ .name = "asiliantfb",
+ .id_table = asiliantfb_pci_tbl,
+ .probe = asiliantfb_pci_init,
+ .remove = __devexit_p(asiliantfb_remove),
+};
+
+static int __init asiliantfb_init(void)
+{
+ if (fb_get_options("asiliantfb", NULL))
+ return -ENODEV;
+
+ return pci_register_driver(&asiliantfb_driver);
+}
+
+module_init(asiliantfb_init);
+
+static void __exit asiliantfb_exit(void)
+{
+ pci_unregister_driver(&asiliantfb_driver);
+}
+
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 05:44:51 +0000