summaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/valkyriefb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/fbdev/valkyriefb.c')
-rw-r--r--drivers/video/fbdev/valkyriefb.c589
1 files changed, 589 insertions, 0 deletions
diff --git a/drivers/video/fbdev/valkyriefb.c b/drivers/video/fbdev/valkyriefb.c
new file mode 100644
index 000000000000..97cb9bd1d1dd
--- /dev/null
+++ b/drivers/video/fbdev/valkyriefb.c
@@ -0,0 +1,589 @@
+/*
+ * valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display
+ *
+ * Created 8 August 1998 by
+ * Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel
+ *
+ * Vmode-switching changes and vmode 15/17 modifications created 29 August
+ * 1998 by Barry K. Nathan <barryn@pobox.com>.
+ *
+ * Ported to m68k Macintosh by David Huggins-Daines <dhd@debian.org>
+ *
+ * Derived directly from:
+ *
+ * controlfb.c -- frame buffer device for the PowerMac 'control' display
+ * Copyright (C) 1998 Dan Jacobowitz <dan@debian.org>
+ *
+ * pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor.
+ * Copyright (C) 1997 Paul Mackerras.
+ *
+ * and indirectly:
+ *
+ * Frame buffer structure from:
+ * drivers/video/chipsfb.c -- frame buffer device for
+ * Chips & Technologies 65550 chip.
+ *
+ * Copyright (C) 1998 Paul Mackerras
+ *
+ * This file is 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.
+ *
+ * Hardware information from:
+ * control.c: Console support for PowerMac "control" display adaptor.
+ * Copyright (C) 1996 Paul Mackerras
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/selection.h>
+#include <linux/init.h>
+#include <linux/nvram.h>
+#include <linux/adb.h>
+#include <linux/cuda.h>
+#include <asm/io.h>
+#ifdef CONFIG_MAC
+#include <asm/macintosh.h>
+#else
+#include <asm/prom.h>
+#endif
+#include <asm/pgtable.h>
+
+#include "macmodes.h"
+#include "valkyriefb.h"
+
+#ifdef CONFIG_MAC
+/* We don't yet have functions to read the PRAM... perhaps we can
+ adapt them from the PPC code? */
+static int default_vmode = VMODE_CHOOSE;
+static int default_cmode = CMODE_8;
+#else
+static int default_vmode = VMODE_NVRAM;
+static int default_cmode = CMODE_NVRAM;
+#endif
+
+struct fb_par_valkyrie {
+ int vmode, cmode;
+ int xres, yres;
+ int vxres, vyres;
+ struct valkyrie_regvals *init;
+};
+
+struct fb_info_valkyrie {
+ struct fb_info info;
+ struct fb_par_valkyrie par;
+ struct cmap_regs __iomem *cmap_regs;
+ unsigned long cmap_regs_phys;
+
+ struct valkyrie_regs __iomem *valkyrie_regs;
+ unsigned long valkyrie_regs_phys;
+
+ __u8 __iomem *frame_buffer;
+ unsigned long frame_buffer_phys;
+
+ int sense;
+ unsigned long total_vram;
+
+ u32 pseudo_palette[16];
+};
+
+/*
+ * Exported functions
+ */
+int valkyriefb_init(void);
+int valkyriefb_setup(char*);
+
+static int valkyriefb_check_var(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+static int valkyriefb_set_par(struct fb_info *info);
+static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int transp, struct fb_info *info);
+static int valkyriefb_blank(int blank_mode, struct fb_info *info);
+
+static int read_valkyrie_sense(struct fb_info_valkyrie *p);
+static void set_valkyrie_clock(unsigned char *params);
+static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
+ struct fb_par_valkyrie *par, const struct fb_info *fb_info);
+
+static int valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
+static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
+static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);
+
+static struct fb_ops valkyriefb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = valkyriefb_check_var,
+ .fb_set_par = valkyriefb_set_par,
+ .fb_setcolreg = valkyriefb_setcolreg,
+ .fb_blank = valkyriefb_blank,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+};
+
+/* Sets the video mode according to info->var */
+static int valkyriefb_set_par(struct fb_info *info)
+{
+ struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
+ volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
+ struct fb_par_valkyrie *par = info->par;
+ struct valkyrie_regvals *init;
+ int err;
+
+ if ((err = valkyrie_var_to_par(&info->var, par, info)))
+ return err;
+
+ valkyrie_par_to_fix(par, &info->fix);
+
+ /* Reset the valkyrie */
+ out_8(&valkyrie_regs->status.r, 0);
+ udelay(100);
+
+ /* Initialize display timing registers */
+ init = par->init;
+ out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
+ out_8(&valkyrie_regs->depth.r, par->cmode + 3);
+ set_valkyrie_clock(init->clock_params);
+ udelay(100);
+
+ /* Turn on display */
+ out_8(&valkyrie_regs->mode.r, init->mode);
+
+ return 0;
+}
+
+static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
+ struct fb_var_screeninfo *var)
+{
+ return mac_vmode_to_var(par->vmode, par->cmode, var);
+}
+
+static int
+valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ int err;
+ struct fb_par_valkyrie par;
+
+ if ((err = valkyrie_var_to_par(var, &par, info)))
+ return err;
+ valkyrie_par_to_var(&par, var);
+ return 0;
+}
+
+/*
+ * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
+ * then the caller blanks by setting the CLUT (Color Look Up Table) to all
+ * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
+ * to e.g. a video mode which doesn't support it. Implements VESA suspend
+ * and powerdown modes on hardware that supports disabling hsync/vsync:
+ * blank_mode == 2: suspend vsync
+ * blank_mode == 3: suspend hsync
+ * blank_mode == 4: powerdown
+ */
+static int valkyriefb_blank(int blank_mode, struct fb_info *info)
+{
+ struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
+ struct fb_par_valkyrie *par = info->par;
+ struct valkyrie_regvals *init = par->init;
+
+ if (init == NULL)
+ return 1;
+
+ switch (blank_mode) {
+ case FB_BLANK_UNBLANK: /* unblank */
+ out_8(&p->valkyrie_regs->mode.r, init->mode);
+ break;
+ case FB_BLANK_NORMAL:
+ return 1; /* get caller to set CLUT to all black */
+ case FB_BLANK_VSYNC_SUSPEND:
+ case FB_BLANK_HSYNC_SUSPEND:
+ /*
+ * [kps] Value extracted from MacOS. I don't know
+ * whether this bit disables hsync or vsync, or
+ * whether the hardware can do the other as well.
+ */
+ out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
+ break;
+ case FB_BLANK_POWERDOWN:
+ out_8(&p->valkyrie_regs->mode.r, 0x66);
+ break;
+ }
+ return 0;
+}
+
+static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int transp, struct fb_info *info)
+{
+ struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
+ volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
+ struct fb_par_valkyrie *par = info->par;
+
+ if (regno > 255)
+ return 1;
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+
+ /* tell clut which address to fill */
+ out_8(&p->cmap_regs->addr, regno);
+ udelay(1);
+ /* send one color channel at a time */
+ out_8(&cmap_regs->lut, red);
+ out_8(&cmap_regs->lut, green);
+ out_8(&cmap_regs->lut, blue);
+
+ if (regno < 16 && par->cmode == CMODE_16)
+ ((u32 *)info->pseudo_palette)[regno] =
+ (regno << 10) | (regno << 5) | regno;
+
+ return 0;
+}
+
+static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
+{
+ int pitch;
+ struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
+
+ if ((pitch = init->pitch[color_mode]) == 0)
+ pitch = 2 * init->pitch[0];
+ return init->vres * pitch;
+}
+
+static void set_valkyrie_clock(unsigned char *params)
+{
+ struct adb_request req;
+ int i;
+
+#ifdef CONFIG_ADB_CUDA
+ for (i = 0; i < 3; ++i) {
+ cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
+ 0x50, i + 1, params[i]);
+ while (!req.complete)
+ cuda_poll();
+ }
+#endif
+}
+
+static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
+{
+ p->sense = read_valkyrie_sense(p);
+ printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
+
+ /* Try to pick a video mode out of NVRAM if we have one. */
+#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
+ if (default_vmode == VMODE_NVRAM) {
+ default_vmode = nvram_read_byte(NV_VMODE);
+ if (default_vmode <= 0
+ || default_vmode > VMODE_MAX
+ || !valkyrie_reg_init[default_vmode - 1])
+ default_vmode = VMODE_CHOOSE;
+ }
+#endif
+ if (default_vmode == VMODE_CHOOSE)
+ default_vmode = mac_map_monitor_sense(p->sense);
+ if (!valkyrie_reg_init[default_vmode - 1])
+ default_vmode = VMODE_640_480_67;
+#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
+ if (default_cmode == CMODE_NVRAM)
+ default_cmode = nvram_read_byte(NV_CMODE);
+#endif
+
+ /*
+ * Reduce the pixel size if we don't have enough VRAM or bandwidth.
+ */
+ if (default_cmode < CMODE_8 || default_cmode > CMODE_16
+ || valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
+ || valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
+ default_cmode = CMODE_8;
+
+ printk(KERN_INFO "using video mode %d and color mode %d.\n",
+ default_vmode, default_cmode);
+}
+
+int __init valkyriefb_init(void)
+{
+ struct fb_info_valkyrie *p;
+ unsigned long frame_buffer_phys, cmap_regs_phys, flags;
+ int err;
+ char *option = NULL;
+
+ if (fb_get_options("valkyriefb", &option))
+ return -ENODEV;
+ valkyriefb_setup(option);
+
+#ifdef CONFIG_MAC
+ if (!MACH_IS_MAC)
+ return -ENODEV;
+ if (!(mac_bi_data.id == MAC_MODEL_Q630
+ /* I'm not sure about this one */
+ || mac_bi_data.id == MAC_MODEL_P588))
+ return -ENODEV;
+
+ /* Hardcoded addresses... welcome to 68k Macintosh country :-) */
+ frame_buffer_phys = 0xf9000000;
+ cmap_regs_phys = 0x50f24000;
+ flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
+#else /* ppc (!CONFIG_MAC) */
+ {
+ struct device_node *dp;
+ struct resource r;
+
+ dp = of_find_node_by_name(NULL, "valkyrie");
+ if (dp == 0)
+ return 0;
+
+ if (of_address_to_resource(dp, 0, &r)) {
+ printk(KERN_ERR "can't find address for valkyrie\n");
+ return 0;
+ }
+
+ frame_buffer_phys = r.start;
+ cmap_regs_phys = r.start + 0x304000;
+ flags = _PAGE_WRITETHRU;
+ }
+#endif /* ppc (!CONFIG_MAC) */
+
+ p = kzalloc(sizeof(*p), GFP_ATOMIC);
+ if (p == 0)
+ return -ENOMEM;
+
+ /* Map in frame buffer and registers */
+ if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
+ kfree(p);
+ return 0;
+ }
+ p->total_vram = 0x100000;
+ p->frame_buffer_phys = frame_buffer_phys;
+ p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
+ p->cmap_regs_phys = cmap_regs_phys;
+ p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
+ p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
+ p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
+ err = -ENOMEM;
+ if (p->frame_buffer == NULL || p->cmap_regs == NULL
+ || p->valkyrie_regs == NULL) {
+ printk(KERN_ERR "valkyriefb: couldn't map resources\n");
+ goto out_free;
+ }
+
+ valkyrie_choose_mode(p);
+ mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
+ err = valkyrie_init_info(&p->info, p);
+ if (err < 0)
+ goto out_free;
+ valkyrie_init_fix(&p->info.fix, p);
+ if (valkyriefb_set_par(&p->info))
+ /* "can't happen" */
+ printk(KERN_ERR "valkyriefb: can't set default video mode\n");
+
+ if ((err = register_framebuffer(&p->info)) != 0)
+ goto out_cmap_free;
+
+ fb_info(&p->info, "valkyrie frame buffer device\n");
+ return 0;
+
+ out_cmap_free:
+ fb_dealloc_cmap(&p->info.cmap);
+ out_free:
+ if (p->frame_buffer)
+ iounmap(p->frame_buffer);
+ if (p->cmap_regs)
+ iounmap(p->cmap_regs);
+ if (p->valkyrie_regs)
+ iounmap(p->valkyrie_regs);
+ kfree(p);
+ return err;
+}
+
+/*
+ * Get the monitor sense value.
+ */
+static int read_valkyrie_sense(struct fb_info_valkyrie *p)
+{
+ int sense, in;
+
+ out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
+ __delay(20000);
+ sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
+ /* drive each sense line low in turn and collect the other 2 */
+ out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
+ __delay(20000);
+ sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
+ out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
+ __delay(20000);
+ sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
+ sense |= (in & 0x10) >> 2;
+ out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
+ __delay(20000);
+ sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
+
+ out_8(&p->valkyrie_regs->msense.r, 7);
+
+ return sense;
+}
+
+/*
+ * This routine takes a user-supplied var,
+ * and picks the best vmode/cmode from it.
+ */
+
+/* [bkn] I did a major overhaul of this function.
+ *
+ * Much of the old code was "swiped by jonh from atyfb.c". Because
+ * macmodes has mac_var_to_vmode, I felt that it would be better to
+ * rework this function to use that, instead of reinventing the wheel to
+ * add support for vmode 17. This was reinforced by the fact that
+ * the previously swiped atyfb.c code is no longer there.
+ *
+ * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
+ * most, but not all, of the old code in the process. One side benefit of
+ * swiping the platinumfb code is that we now have more comprehensible error
+ * messages when a vmode/cmode switch fails. (Most of the error messages are
+ * platinumfb.c, but I added two of my own, and I also changed some commas
+ * into colons to make the messages more consistent with other Linux error
+ * messages.) In addition, I think the new code *might* fix some vmode-
+ * switching oddities, but I'm not sure.
+ *
+ * There may be some more opportunities for cleanup in here, but this is a
+ * good start...
+ */
+
+static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
+ struct fb_par_valkyrie *par, const struct fb_info *fb_info)
+{
+ int vmode, cmode;
+ struct valkyrie_regvals *init;
+ struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) fb_info;
+
+ if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
+ printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
+ var->xres, var->yres, var->bits_per_pixel);
+ return -EINVAL;
+ }
+
+ /* Check if we know about the wanted video mode */
+ if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) {
+ printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
+ return -EINVAL;
+ }
+
+ if (cmode != CMODE_8 && cmode != CMODE_16) {
+ printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
+ return -EINVAL;
+ }
+
+ if (var->xres_virtual > var->xres || var->yres_virtual > var->yres
+ || var->xoffset != 0 || var->yoffset != 0) {
+ return -EINVAL;
+ }
+
+ init = valkyrie_reg_init[vmode-1];
+ if (init->pitch[cmode] == 0) {
+ printk(KERN_ERR "valkyriefb: vmode %d does not support "
+ "cmode %d.\n", vmode, cmode);
+ return -EINVAL;
+ }
+
+ if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
+ printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
+ "cmode %d.\n", vmode, cmode);
+ return -EINVAL;
+ }
+
+ par->vmode = vmode;
+ par->cmode = cmode;
+ par->init = init;
+ par->xres = var->xres;
+ par->yres = var->yres;
+ par->vxres = par->xres;
+ par->vyres = par->yres;
+
+ return 0;
+}
+
+static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p)
+{
+ memset(fix, 0, sizeof(*fix));
+ strcpy(fix->id, "valkyrie");
+ fix->mmio_start = p->valkyrie_regs_phys;
+ fix->mmio_len = sizeof(struct valkyrie_regs);
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->smem_start = p->frame_buffer_phys + 0x1000;
+ fix->smem_len = p->total_vram;
+
+ fix->type_aux = 0;
+ fix->ywrapstep = 0;
+ fix->ypanstep = 0;
+ fix->xpanstep = 0;
+
+}
+
+/* Fix must already be inited above */
+static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
+ struct fb_fix_screeninfo *fix)
+{
+ fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
+ fix->visual = (par->cmode == CMODE_8) ?
+ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
+ fix->line_length = par->vxres << par->cmode;
+ /* ywrapstep, xpanstep, ypanstep */
+}
+
+static int __init valkyrie_init_info(struct fb_info *info,
+ struct fb_info_valkyrie *p)
+{
+ info->fbops = &valkyriefb_ops;
+ info->screen_base = p->frame_buffer + 0x1000;
+ info->flags = FBINFO_DEFAULT;
+ info->pseudo_palette = p->pseudo_palette;
+ info->par = &p->par;
+ return fb_alloc_cmap(&info->cmap, 256, 0);
+}
+
+
+/*
+ * Parse user specified options (`video=valkyriefb:')
+ */
+int __init valkyriefb_setup(char *options)
+{
+ char *this_opt;
+
+ if (!options || !*options)
+ return 0;
+
+ while ((this_opt = strsep(&options, ",")) != NULL) {
+ if (!strncmp(this_opt, "vmode:", 6)) {
+ int vmode = simple_strtoul(this_opt+6, NULL, 0);
+ if (vmode > 0 && vmode <= VMODE_MAX)
+ default_vmode = vmode;
+ }
+ else if (!strncmp(this_opt, "cmode:", 6)) {
+ int depth = simple_strtoul(this_opt+6, NULL, 0);
+ switch (depth) {
+ case 8:
+ default_cmode = CMODE_8;
+ break;
+ case 15:
+ case 16:
+ default_cmode = CMODE_16;
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
+module_init(valkyriefb_init);
+MODULE_LICENSE("GPL");
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-27 21:24:09 +0000