*
* (c) 2004 Simtec Electronics
* (c) 2005 Thibaut VARENE <varenet@parisc-linux.org>
+ * (c) 2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
*
* Driver for Epson S1D13xxx series framebuffer chips
*
* linux/drivers/video/epson1355fb.c
* linux/drivers/video/epson/s1d13xxxfb.c (2.4 driver by Epson)
*
- * Note, currently only tested on S1D13806 with 16bit CRT.
- * As such, this driver might still contain some hardcoded bits relating to
- * S1D13806.
- * Making it work on other S1D13XXX chips should merely be a matter of adding
- * a few switch()s, some missing glue here and there maybe, and split header
- * files.
- *
* TODO: - handle dual screen display (CRT and LCD at the same time).
* - check_var(), mode change, etc.
- * - PM untested.
- * - Accelerated interfaces.
- * - Probably not SMP safe :)
+ * - probably not SMP safe :)
+ * - support all bitblt operations on all cards
*
* 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
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
-
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/fb.h>
+#include <linux/spinlock_types.h>
+#include <linux/spinlock.h>
#include <asm/io.h>
#include <video/s1d13xxxfb.h>
-#define PFX "s1d13xxxfb: "
+#define PFX "s1d13xxxfb: "
+#define BLIT "s1d13xxxfb_bitblt: "
+/*
+ * set this to enable debugging on general functions
+ */
#if 0
#define dbg(fmt, args...) do { printk(KERN_INFO fmt, ## args); } while(0)
#else
#endif
/*
- * List of card production ids
+ * set this to enable debugging on 2D acceleration
+ */
+#if 0
+#define dbg_blit(fmt, args...) do { printk(KERN_INFO BLIT fmt, ## args); } while (0)
+#else
+#define dbg_blit(fmt, args...) do { } while (0)
+#endif
+
+/*
+ * we make sure only one bitblt operation is running
+ */
+static DEFINE_SPINLOCK(s1d13xxxfb_bitblt_lock);
+
+/*
+ * list of card production ids
*/
static const int s1d13xxxfb_prod_ids[] = {
S1D13505_PROD_ID,
};
/*
- * Here we define the default struct fb_fix_screeninfo
+ * here we define the default struct fb_fix_screeninfo
*/
static struct fb_fix_screeninfo __devinitdata s1d13xxxfb_fix = {
.id = S1D_FBID,
s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
}
-/* framebuffer control routines */
+/*************************************************************
+ framebuffer control functions
+ *************************************************************/
static inline void
s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
{
}
/**
- * s1d13xxxfb_setcolreg - sets a color register.
- * @regno: Which register in the CLUT we are programming
- * @red: The red value which can be up to 16 bits wide
+ * s1d13xxxfb_setcolreg - sets a color register.
+ * @regno: Which register in the CLUT we are programming
+ * @red: The red value which can be up to 16 bits wide
* @green: The green value which can be up to 16 bits wide
* @blue: The blue value which can be up to 16 bits wide.
* @transp: If supported the alpha value which can be up to 16 bits wide.
- * @info: frame buffer info structure
+ * @info: frame buffer info structure
*
* Returns negative errno on error, or zero on success.
*/
}
/**
- * s1d13xxxfb_pan_display - Pans the display.
- * @var: frame buffer variable screen structure
- * @info: frame buffer structure that represents a single frame buffer
+ * s1d13xxxfb_pan_display - Pans the display.
+ * @var: frame buffer variable screen structure
+ * @info: frame buffer structure that represents a single frame buffer
*
* Pan (or wrap, depending on the `vmode' field) the display using the
- * `yoffset' field of the `var' structure (`xoffset' not yet supported).
- * If the values don't fit, return -EINVAL.
+ * `yoffset' field of the `var' structure (`xoffset' not yet supported).
+ * If the values don't fit, return -EINVAL.
*
- * Returns negative errno on error, or zero on success.
+ * Returns negative errno on error, or zero on success.
*/
static int
s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
return 0;
}
-/* framebuffer information structures */
+/************************************************************
+ functions to handle bitblt acceleration
+ ************************************************************/
+
+/**
+ * bltbit_wait_bitset - waits for change in register value
+ * @info : framebuffer structure
+ * @bit : value expected in register
+ * @timeout : ...
+ *
+ * waits until value changes INTO bit
+ */
+static u8
+bltbit_wait_bitset(struct fb_info *info, u8 bit, int timeout)
+{
+ while (!(s1d13xxxfb_readreg(info->par, S1DREG_BBLT_CTL0) & bit)) {
+ udelay(10);
+ if (!--timeout) {
+ dbg_blit("wait_bitset timeout\n");
+ break;
+ }
+ }
+
+ return timeout;
+}
+
+/**
+ * bltbit_wait_bitclear - waits for change in register value
+ * @info : frambuffer structure
+ * @bit : value currently in register
+ * @timeout : ...
+ *
+ * waits until value changes FROM bit
+ *
+ */
+static u8
+bltbit_wait_bitclear(struct fb_info *info, u8 bit, int timeout)
+{
+ while (s1d13xxxfb_readreg(info->par, S1DREG_BBLT_CTL0) & bit) {
+ udelay(10);
+ if (!--timeout) {
+ dbg_blit("wait_bitclear timeout\n");
+ break;
+ }
+ }
+
+ return timeout;
+}
+
+/**
+ * bltbit_fifo_status - checks the current status of the fifo
+ * @info : framebuffer structure
+ *
+ * returns number of free words in buffer
+ */
+static u8
+bltbit_fifo_status(struct fb_info *info)
+{
+ u8 status;
+ status = s1d13xxxfb_readreg(info->par, S1DREG_BBLT_CTL0);
+
+ /* its empty so room for 16 words */
+ if (status & BBLT_FIFO_EMPTY)
+ return 16;
+
+ /* its full so we dont want to add */
+ if (status & BBLT_FIFO_FULL)
+ return 0;
+
+ /* its atleast half full but we can add one atleast */
+ if (status & BBLT_FIFO_NOT_FULL)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * s1d13xxxfb_bitblt_copyarea - accelerated copyarea function
+ * @info : framebuffer structure
+ * @area : fb_copyarea structure
+ *
+ * supports (atleast) S1D13506
+ *
+ */
+static void
+s1d13xxxfb_bitblt_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+ u32 dst, src;
+ u32 stride;
+ u16 reverse = 0;
+ u16 sx = area->sx, sy = area->sy;
+ u16 dx = area->dx, dy = area->dy;
+ u16 width = area->width, height = area->height;
+ u16 bpp;
+
+ spin_lock(&s1d13xxxfb_bitblt_lock);
+
+ /* bytes per xres line */
+ bpp = (info->var.bits_per_pixel >> 3);
+ stride = bpp * info->var.xres;
+
+ /* reverse, calculate the last pixel in rectangle */
+ if ((dy > sy) || ((dy == sy) && (dx >= sx))) {
+ dst = (((dy + height - 1) * stride) + (bpp * (dx + width - 1)));
+ src = (((sy + height - 1) * stride) + (bpp * (sx + width - 1)));
+ reverse = 1;
+ /* not reverse, calculate the first pixel in rectangle */
+ } else { /* (y * xres) + (bpp * x) */
+ dst = (dy * stride) + (bpp * dx);
+ src = (sy * stride) + (bpp * sx);
+ }
+
+ /* set source adress */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START0, (src & 0xff));
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START1, (src >> 8) & 0x00ff);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START2, (src >> 16) & 0x00ff);
+
+ /* set destination adress */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dst & 0xff));
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, (dst >> 8) & 0x00ff);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, (dst >> 16) & 0x00ff);
+
+ /* program height and width */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, (width & 0xff) - 1);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (width >> 8));
+
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, (height & 0xff) - 1);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (height >> 8));
+
+ /* negative direction ROP */
+ if (reverse == 1) {
+ dbg_blit("(copyarea) negative rop\n");
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0x03);
+ } else /* positive direction ROP */ {
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0x02);
+ dbg_blit("(copyarea) positive rop\n");
+ }
+
+ /* set for rectangel mode and not linear */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
+
+ /* setup the bpp 1 = 16bpp, 0 = 8bpp*/
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (bpp >> 1));
+
+ /* set words per xres */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (stride >> 1) & 0xff);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (stride >> 9));
+
+ dbg_blit("(copyarea) dx=%d, dy=%d\n", dx, dy);
+ dbg_blit("(copyarea) sx=%d, sy=%d\n", sx, sy);
+ dbg_blit("(copyarea) width=%d, height=%d\n", width - 1, height - 1);
+ dbg_blit("(copyarea) stride=%d\n", stride);
+ dbg_blit("(copyarea) bpp=%d=0x0%d, mem_offset1=%d, mem_offset2=%d\n", bpp, (bpp >> 1),
+ (stride >> 1) & 0xff, stride >> 9);
+
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CC_EXP, 0x0c);
+
+ /* initialize the engine */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
+
+ /* wait to complete */
+ bltbit_wait_bitclear(info, 0x80, 8000);
+
+ spin_unlock(&s1d13xxxfb_bitblt_lock);
+}
+
+/**
+ *
+ * s1d13xxxfb_bitblt_solidfill - accelerated solidfill function
+ * @info : framebuffer structure
+ * @rect : fb_fillrect structure
+ *
+ * supports (atleast 13506)
+ *
+ **/
+static void
+s1d13xxxfb_bitblt_solidfill(struct fb_info *info, const struct fb_fillrect *rect)
+{
+ u32 screen_stride, dest;
+ u32 fg;
+ u16 bpp = (info->var.bits_per_pixel >> 3);
+
+ /* grab spinlock */
+ spin_lock(&s1d13xxxfb_bitblt_lock);
+
+ /* bytes per x width */
+ screen_stride = (bpp * info->var.xres);
+
+ /* bytes to starting point */
+ dest = ((rect->dy * screen_stride) + (bpp * rect->dx));
+
+ dbg_blit("(solidfill) dx=%d, dy=%d, stride=%d, dest=%d\n"
+ "(solidfill) : rect_width=%d, rect_height=%d\n",
+ rect->dx, rect->dy, screen_stride, dest,
+ rect->width - 1, rect->height - 1);
+
+ dbg_blit("(solidfill) : xres=%d, yres=%d, bpp=%d\n",
+ info->var.xres, info->var.yres,
+ info->var.bits_per_pixel);
+ dbg_blit("(solidfill) : rop=%d\n", rect->rop);
+
+ /* We split the destination into the three registers */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dest & 0x00ff));
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, ((dest >> 8) & 0x00ff));
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, ((dest >> 16) & 0x00ff));
+
+ /* give information regarding rectangel width */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, ((rect->width) & 0x00ff) - 1);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (rect->width >> 8));
+
+ /* give information regarding rectangel height */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, ((rect->height) & 0x00ff) - 1);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (rect->height >> 8));
+
+ if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
+ info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+ fg = ((u32 *)info->pseudo_palette)[rect->color];
+ dbg_blit("(solidfill) truecolor/directcolor\n");
+ dbg_blit("(solidfill) pseudo_palette[%d] = %d\n", rect->color, fg);
+ } else {
+ fg = rect->color;
+ dbg_blit("(solidfill) color = %d\n", rect->color);
+ }
+
+ /* set foreground color */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC0, (fg & 0xff));
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC1, (fg >> 8) & 0xff);
+
+ /* set rectangual region of memory (rectangle and not linear) */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
+
+ /* set operation mode SOLID_FILL */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, BBLT_SOLID_FILL);
+
+ /* set bits per pixel (1 = 16bpp, 0 = 8bpp) */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (info->var.bits_per_pixel >> 4));
+
+ /* set the memory offset for the bblt in word sizes */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (screen_stride >> 1) & 0x00ff);
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (screen_stride >> 9));
+
+ /* and away we go.... */
+ s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
+
+ /* wait until its done */
+ bltbit_wait_bitclear(info, 0x80, 8000);
+
+ /* let others play */
+ spin_unlock(&s1d13xxxfb_bitblt_lock);
+}
+
+/* framebuffer information structures */
static struct fb_ops s1d13xxxfb_fbops = {
.owner = THIS_MODULE,
.fb_set_par = s1d13xxxfb_set_par,
.fb_pan_display = s1d13xxxfb_pan_display,
- /* to be replaced by any acceleration we can */
+ /* gets replaced at chip detection time */
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
/**
- * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
+ * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
* hardware setup.
- * @info: frame buffer structure
+ * @info: frame buffer structure
*
* We setup the framebuffer structures according to the current
* hardware setup. On some machines, the BIOS will have filled
if (pdata && pdata->platform_init_video)
pdata->platform_init_video();
-
if (pdev->num_resources != 2) {
dev_err(&pdev->dev, "invalid num_resources: %i\n",
pdev->num_resources);
info->fix = s1d13xxxfb_fix;
info->fix.mmio_start = pdev->resource[1].start;
- info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start +1;
+ info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start + 1;
info->fix.smem_start = pdev->resource[0].start;
- info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start +1;
+ info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start + 1;
printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
default_par->regs, info->fix.smem_len / 1024, info->screen_base);
info->par = default_par;
- info->fbops = &s1d13xxxfb_fbops;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
+ info->fbops = &s1d13xxxfb_fbops;
+
+ switch(prod_id) {
+ case S1D13506_PROD_ID: /* activate acceleration */
+ s1d13xxxfb_fbops.fb_fillrect = s1d13xxxfb_bitblt_solidfill;
+ s1d13xxxfb_fbops.fb_copyarea = s1d13xxxfb_bitblt_copyarea;
+ info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
+ FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
+ break;
+ default:
+ break;
+ }
/* perform "manual" chip initialization, if needed */
if (pdata && pdata->initregs)
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