/* drivers/video/s1d13xxxfb.c
*
* ( 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
*
* Adapted from
* linux / drivers / video / skeletonfb . c
* linux / drivers / video / epson1355fb . c
* linux / drivers / video / epson / s1d13xxxfb . c ( 2 . 4 driver by Epson )
*
* TODO : - handle dual screen display ( CRT and LCD at the same time ) .
* - check_var ( ) , mode change , etc .
* - 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
* more details .
*/
#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 <linux/slab.h>
#include <linux/io.h>
#include <video/s1d13xxxfb.h>
#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
#define dbg(fmt, args...) do { no_printk(KERN_INFO fmt, ## args); } while (0 )
#endif
/*
* set this to enable debugging on 2 D 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,
S1D13506_PROD_ID,
S1D13806_PROD_ID,
};
/*
* List of card strings
*/
static const char *s1d13xxxfb_prod_names[] = {
"S1D13505" ,
"S1D13506" ,
"S1D13806" ,
};
/*
* here we define the default struct fb_fix_screeninfo
*/
static const struct fb_fix_screeninfo s1d13xxxfb_fix = {
.id = S1D_FBID,
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_PSEUDOCOLOR,
.xpanstep = 0 ,
.ypanstep = 1 ,
.ywrapstep = 0 ,
.accel = FB_ACCEL_NONE,
};
static inline u8
s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
{
return readb(par->regs + regno);
}
static inline void
s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
{
writeb(value, par->regs + regno);
}
static inline void
s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
const struct s1d13xxxfb_regval *initregs,
const unsigned int size)
{
int i;
for (i = 0 ; i < size; i++) {
if ((initregs[i].addr == S1DREG_DELAYOFF) ||
(initregs[i].addr == S1DREG_DELAYON))
mdelay((int )initregs[i].value);
else {
s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
}
}
/* make sure the hardware can cope with us */
mdelay(1 );
}
static inline void
lcd_enable(struct s1d13xxxfb_par *par, int enable)
{
u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
if (enable)
mode |= 0 x01;
else
mode &= ~0 x01;
s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
}
static inline void
crt_enable(struct s1d13xxxfb_par *par, int enable)
{
u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
if (enable)
mode |= 0 x02;
else
mode &= ~0 x02;
s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
}
/*************************************************************
framebuffer control functions
*************************************************************/
static inline void
s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
{
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
info->var.red.length = 4 ;
info->var.green.length = 4 ;
info->var.blue.length = 4 ;
}
static inline void
s1d13xxxfb_setup_truecolour(struct fb_info *info)
{
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->var.bits_per_pixel = 16 ;
info->var.red.length = 5 ;
info->var.red.offset = 11 ;
info->var.green.length = 6 ;
info->var.green.offset = 5 ;
info->var.blue.length = 5 ;
info->var.blue.offset = 0 ;
}
/**
* s1d13xxxfb_set_par - Alters the hardware state .
* @ info : frame buffer structure
*
* Using the fb_var_screeninfo in fb_info we set the depth of the
* framebuffer . This function alters the par AND the
* fb_fix_screeninfo stored in fb_info . It doesn ' t not alter var in
* fb_info since we are using that data . This means we depend on the
* data in var inside fb_info to be supported by the hardware .
* xxxfb_check_var is always called before xxxfb_set_par to ensure this .
*
* XXX TODO : write proper s1d13xxxfb_check_var ( ) , without which that
* function is quite useless .
*/
static int
s1d13xxxfb_set_par(struct fb_info *info)
{
struct s1d13xxxfb_par *s1dfb = info->par;
unsigned int val;
dbg("s1d13xxxfb_set_par: bpp=%d\n" , info->var.bits_per_pixel);
if ((s1dfb->display & 0 x01)) /* LCD */
val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE); /* read colour control */
else /* CRT */
val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE); /* read colour control */
val &= ~0 x07;
switch (info->var.bits_per_pixel) {
case 4 :
dbg("pseudo colour 4\n" );
s1d13xxxfb_setup_pseudocolour(info);
val |= 2 ;
break ;
case 8 :
dbg("pseudo colour 8\n" );
s1d13xxxfb_setup_pseudocolour(info);
val |= 3 ;
break ;
case 16 :
dbg("true colour\n" );
s1d13xxxfb_setup_truecolour(info);
val |= 5 ;
break ;
default :
dbg("bpp not supported!\n" );
return -EINVAL;
}
dbg("writing %02x to display mode register\n" , val);
if ((s1dfb->display & 0 x01)) /* LCD */
s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
else /* CRT */
s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
info->fix.line_length = info->var.xres * info->var.bits_per_pixel;
info->fix.line_length /= 8 ;
dbg("setting line_length to %d\n" , info->fix.line_length);
dbg("done setup\n" );
return 0 ;
}
/**
* 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
*
* Returns negative errno on error , or zero on success .
*/
static int
s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
struct s1d13xxxfb_par *s1dfb = info->par;
unsigned int pseudo_val;
if (regno >= S1D_PALETTE_SIZE)
return -EINVAL;
dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n" ,
regno, red, green, blue, transp);
if (info->var.grayscale)
red = green = blue = (19595 *red + 38470 *green + 7471 *blue) >> 16 ;
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
if (regno >= 16 )
return -EINVAL;
/* deal with creating pseudo-palette entries */
pseudo_val = (red >> 11 ) << info->var.red.offset;
pseudo_val |= (green >> 10 ) << info->var.green.offset;
pseudo_val |= (blue >> 11 ) << info->var.blue.offset;
dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n" ,
regno, pseudo_val);
((u32 *)info->pseudo_palette)[regno] = pseudo_val;
break ;
case FB_VISUAL_PSEUDOCOLOR:
s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
break ;
default :
return -ENOSYS;
}
dbg("s1d13xxxfb_setcolreg: done\n" );
return 0 ;
}
/**
* s1d13xxxfb_blank - blanks the display .
* @ blank_mode : the blank mode we want .
* @ info : frame buffer structure that represents a single frame buffer
*
* Blank the screen if blank_mode ! = 0 , else unblank . 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
*
* Returns negative errno on error , or zero on success .
*/
static int
s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
{
struct s1d13xxxfb_par *par = info->par;
dbg("s1d13xxxfb_blank: blank=%d, info=%p\n" , blank_mode, info);
switch (blank_mode) {
case FB_BLANK_UNBLANK:
case FB_BLANK_NORMAL:
if ((par->display & 0 x01) != 0 )
lcd_enable(par, 1 );
if ((par->display & 0 x02) != 0 )
crt_enable(par, 1 );
break ;
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
break ;
case FB_BLANK_POWERDOWN:
lcd_enable(par, 0 );
crt_enable(par, 0 );
break ;
default :
return -EINVAL;
}
/* let fbcon do a soft blank for us */
return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0 );
}
/**
* 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 .
*
* Returns negative errno on error , or zero on success .
*/
static int
s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct s1d13xxxfb_par *par = info->par;
u32 start;
if (var->xoffset != 0 ) /* not yet ... */
return -EINVAL;
if (var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
start = (info->fix.line_length >> 1 ) * var->yoffset;
if ((par->display & 0 x01)) {
/* LCD */
s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0 xff));
s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8 ) & 0 xff));
s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16 ) & 0 x0f));
} else {
/* CRT */
s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0 xff));
s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8 ) & 0 xff));
s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16 ) & 0 x0f));
}
return 0 ;
}
/************************************************************
functions to handle bitblt acceleration
************************************************************/
/**
* 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;
}
/*
* 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 address */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START0, (src & 0 xff));
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START1, (src >> 8 ) & 0 x00ff);
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START2, (src >> 16 ) & 0 x00ff);
/* set destination address */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dst & 0 xff));
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, (dst >> 8 ) & 0 x00ff);
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, (dst >> 16 ) & 0 x00ff);
/* program height and width */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, (width & 0 xff) - 1 );
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (width >> 8 ));
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, (height & 0 xff) - 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, 0 x03);
} else /* positive direction ROP */ {
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0 x02);
dbg_blit("(copyarea) positive rop\n" );
}
/* set for rectangel mode and not linear */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0 x0);
/* 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 ) & 0 xff);
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 ) & 0 xff, stride >> 9 );
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CC_EXP, 0 x0c);
/* initialize the engine */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0 x80);
/* wait to complete */
bltbit_wait_bitclear(info, 0 x80, 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 & 0 x00ff));
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, ((dest >> 8 ) & 0 x00ff));
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, ((dest >> 16 ) & 0 x00ff));
/* give information regarding rectangel width */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, ((rect->width) & 0 x00ff) - 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) & 0 x00ff) - 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 & 0 xff));
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC1, (fg >> 8 ) & 0 xff);
/* set rectangual region of memory (rectangle and not linear) */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0 x0);
/* 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 ) & 0 x00ff);
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (screen_stride >> 9 ));
/* and away we go.... */
s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0 x80);
/* wait until its done */
bltbit_wait_bitclear(info, 0 x80, 8000 );
/* let others play */
spin_unlock(&s1d13xxxfb_bitblt_lock);
}
/* framebuffer information structures */
static const struct fb_ops s1d13xxxfb_fbops = {
.owner = THIS_MODULE,
FB_DEFAULT_IOMEM_OPS,
.fb_set_par = s1d13xxxfb_set_par,
.fb_setcolreg = s1d13xxxfb_setcolreg,
.fb_blank = s1d13xxxfb_blank,
.fb_pan_display = s1d13xxxfb_pan_display,
};
static const struct fb_ops s1d13xxxfb_fbops_s1d13506 = {
.owner = THIS_MODULE,
__FB_DEFAULT_IOMEM_OPS_RDWR,
.fb_set_par = s1d13xxxfb_set_par,
.fb_setcolreg = s1d13xxxfb_setcolreg,
.fb_blank = s1d13xxxfb_blank,
.fb_pan_display = s1d13xxxfb_pan_display,
.fb_fillrect = s1d13xxxfb_bitblt_solidfill,
.fb_copyarea = s1d13xxxfb_bitblt_copyarea,
.fb_imageblit = cfb_imageblit,
__FB_DEFAULT_IOMEM_OPS_MMAP,
};
static int s1d13xxxfb_width_tab[2 ][4 ] = {
{4 , 8 , 16 , -1 },
{9 , 12 , 18 , -1 },
};
/**
* s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
* hardware setup .
* @ info : frame buffer structure
*
* We setup the framebuffer structures according to the current
* hardware setup . On some machines , the BIOS will have filled
* the chip registers with such info , on others , these values will
* have been written in some init procedure . In any case , the
* software values needs to match the hardware ones . This is what
* this function ensures .
*
* Note : some of the hardcoded values here might need some love to
* work on various chips , and might need to no longer be hardcoded .
*/
static void s1d13xxxfb_fetch_hw_state(struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
struct fb_fix_screeninfo *fix = &info->fix;
struct s1d13xxxfb_par *par = info->par;
u8 panel, display;
u16 offset;
u32 xres, yres;
u32 xres_virtual, yres_virtual;
int bpp, lcd_bpp;
int is_color, is_dual, is_tft;
int lcd_enabled, crt_enabled;
fix->type = FB_TYPE_PACKED_PIXELS;
/* general info */
par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
crt_enabled = (par->display & 0 x02) != 0 ;
lcd_enabled = (par->display & 0 x01) != 0 ;
if (lcd_enabled && crt_enabled)
printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n" );
if (lcd_enabled)
display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
else /* CRT */
display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
bpp = display & 0 x07;
switch (bpp) {
case 2 : /* 4 bpp */
case 3 : /* 8 bpp */
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 ;
break ;
case 5 : /* 16 bpp */
s1d13xxxfb_setup_truecolour(info);
break ;
default :
dbg("bpp: %i\n" , bpp);
}
fb_alloc_cmap(&info->cmap, 256 , 0 );
/* LCD info */
panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
is_color = (panel & 0 x04) != 0 ;
is_dual = (panel & 0 x02) != 0 ;
is_tft = (panel & 0 x01) != 0 ;
lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4 ) & 3 ];
if (lcd_enabled) {
xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1 ) * 8 ;
yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0 x03) << 8 ) + 1 );
offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0 x7) << 8 ));
} else { /* crt */
xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1 ) * 8 ;
yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0 x03) << 8 ) + 1 );
offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0 x7) << 8 ));
}
xres_virtual = offset * 16 / var->bits_per_pixel;
yres_virtual = fix->smem_len / (offset * 2 );
var->xres = xres;
var->yres = yres;
var->xres_virtual = xres_virtual;
var->yres_virtual = yres_virtual;
var->xoffset = var->yoffset = 0 ;
fix->line_length = offset * 2 ;
var->grayscale = !is_color;
var->activate = FB_ACTIVATE_NOW;
dbg(PFX "bpp=%d, lcd_bpp=%d, "
"crt_enabled=%d, lcd_enabled=%d\n" ,
var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
"is_color=%d, is_dual=%d, is_tft=%d\n" ,
xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
}
static void __s1d13xxxfb_remove(struct platform_device *pdev)
{
struct fb_info *info = platform_get_drvdata(pdev);
struct s1d13xxxfb_par *par = NULL;
if (info) {
par = info->par;
if (par && par->regs) {
/* disable output & enable powersave */
s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0 x00);
s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0 x11);
iounmap(par->regs);
}
fb_dealloc_cmap(&info->cmap);
if (info->screen_base)
iounmap(info->screen_base);
framebuffer_release(info);
}
release_mem_region(pdev->resource[0 ].start,
resource_size(&pdev->resource[0 ]));
release_mem_region(pdev->resource[1 ].start,
resource_size(&pdev->resource[1 ]));
}
static void s1d13xxxfb_remove(struct platform_device *pdev)
{
struct fb_info *info = platform_get_drvdata(pdev);
unregister_framebuffer(info);
__s1d13xxxfb_remove(pdev);
}
static int s1d13xxxfb_probe(struct platform_device *pdev)
{
struct s1d13xxxfb_par *default_par;
struct fb_info *info;
struct s1d13xxxfb_pdata *pdata = NULL;
int ret = 0 ;
int i;
u8 revision, prod_id;
dbg("probe called: device is %p\n" , pdev);
printk(KERN_INFO "Epson S1D13XXX FB Driver\n" );
/* enable platform-dependent hardware glue, if any */
if (dev_get_platdata(&pdev->dev))
pdata = dev_get_platdata(&pdev->dev);
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);
ret = -ENODEV;
goto bail;
}
/* resource[0] is VRAM, resource[1] is registers */
if (pdev->resource[0 ].flags != IORESOURCE_MEM
|| pdev->resource[1 ].flags != IORESOURCE_MEM) {
dev_err(&pdev->dev, "invalid resource type\n" );
ret = -ENODEV;
goto bail;
}
if (!request_mem_region(pdev->resource[0 ].start,
resource_size(&pdev->resource[0 ]), "s1d13xxxfb mem" )) {
dev_dbg(&pdev->dev, "request_mem_region failed\n" );
ret = -EBUSY;
goto bail;
}
if (!request_mem_region(pdev->resource[1 ].start,
resource_size(&pdev->resource[1 ]), "s1d13xxxfb regs" )) {
dev_dbg(&pdev->dev, "request_mem_region failed\n" );
ret = -EBUSY;
goto bail;
}
info = framebuffer_alloc(sizeof (struct s1d13xxxfb_par) + sizeof (u32) * 256 , &pdev->dev);
if (!info) {
ret = -ENOMEM;
goto bail;
}
platform_set_drvdata(pdev, info);
default_par = info->par;
default_par->regs = ioremap(pdev->resource[1 ].start,
resource_size(&pdev->resource[1 ]));
if (!default_par->regs) {
printk(KERN_ERR PFX "unable to map registers\n" );
ret = -ENOMEM;
goto bail;
}
info->pseudo_palette = default_par->pseudo_palette;
info->screen_base = ioremap(pdev->resource[0 ].start,
resource_size(&pdev->resource[0 ]));
if (!info->screen_base) {
printk(KERN_ERR PFX "unable to map framebuffer\n" );
ret = -ENOMEM;
goto bail;
}
/* production id is top 6 bits */
prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2 ;
/* revision id is lower 2 bits */
revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0 x3;
ret = -ENODEV;
for (i = 0 ; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
if (prod_id == s1d13xxxfb_prod_ids[i]) {
/* looks like we got it in our list */
default_par->prod_id = prod_id;
default_par->revision = revision;
ret = 0 ;
break ;
}
}
if (!ret) {
printk(KERN_INFO PFX "chip production id %i = %s\n" ,
prod_id, s1d13xxxfb_prod_names[i]);
printk(KERN_INFO PFX "chip revision %i\n" , revision);
} else {
printk(KERN_INFO PFX
"unknown chip production id %i, revision %i\n" ,
prod_id, revision);
printk(KERN_INFO PFX "please contact maintainer\n" );
goto bail;
}
info->fix = s1d13xxxfb_fix;
info->fix.mmio_start = pdev->resource[1 ].start;
info->fix.mmio_len = resource_size(&pdev->resource[1 ]);
info->fix.smem_start = pdev->resource[0 ].start;
info->fix.smem_len = resource_size(&pdev->resource[0 ]);
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;
switch (prod_id) {
case S1D13506_PROD_ID: /* activate acceleration */
info->flags = FBINFO_HWACCEL_YPAN |
FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
info->fbops = &s1d13xxxfb_fbops_s1d13506;
break ;
default :
info->flags = FBINFO_HWACCEL_YPAN;
info->fbops = &s1d13xxxfb_fbops;
break ;
}
/* perform "manual" chip initialization, if needed */
if (pdata && pdata->initregs)
s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
s1d13xxxfb_fetch_hw_state(info);
if (register_framebuffer(info) < 0 ) {
ret = -EINVAL;
goto bail;
}
fb_info(info, "%s frame buffer device\n" , info->fix.id);
return 0 ;
bail:
__s1d13xxxfb_remove(pdev);
return ret;
}
#ifdef CONFIG_PM
static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
{
struct fb_info *info = platform_get_drvdata(dev);
struct s1d13xxxfb_par *s1dfb = info->par;
struct s1d13xxxfb_pdata *pdata = NULL;
/* disable display */
lcd_enable(s1dfb, 0 );
crt_enable(s1dfb, 0 );
if (dev_get_platdata(&dev->dev))
pdata = dev_get_platdata(&dev->dev);
#if 0
if (!s1dfb->disp_save)
s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
if (!s1dfb->disp_save) {
printk(KERN_ERR PFX "no memory to save screen\n" );
return -ENOMEM;
}
memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
#else
s1dfb->disp_save = NULL;
#endif
if (!s1dfb->regs_save)
s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
if (!s1dfb->regs_save) {
printk(KERN_ERR PFX "no memory to save registers" );
return -ENOMEM;
}
/* backup all registers */
memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
/* now activate power save mode */
s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0 x11);
if (pdata && pdata->platform_suspend_video)
return pdata->platform_suspend_video();
else
return 0 ;
}
static int s1d13xxxfb_resume(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
struct s1d13xxxfb_par *s1dfb = info->par;
struct s1d13xxxfb_pdata *pdata = NULL;
/* awaken the chip */
s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0 x10);
/* do not let go until SDRAM "wakes up" */
while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0 x01))
udelay(10 );
if (dev_get_platdata(&dev->dev))
pdata = dev_get_platdata(&dev->dev);
if (s1dfb->regs_save) {
/* will write RO regs, *should* get away with it :) */
memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
kfree(s1dfb->regs_save);
}
if (s1dfb->disp_save) {
memcpy_toio(info->screen_base, s1dfb->disp_save,
info->fix.smem_len);
kfree(s1dfb->disp_save); /* XXX kmalloc()'d when? */
}
if ((s1dfb->display & 0 x01) != 0 )
lcd_enable(s1dfb, 1 );
if ((s1dfb->display & 0 x02) != 0 )
crt_enable(s1dfb, 1 );
if (pdata && pdata->platform_resume_video)
return pdata->platform_resume_video();
else
return 0 ;
}
#endif /* CONFIG_PM */
static struct platform_driver s1d13xxxfb_driver = {
.probe = s1d13xxxfb_probe,
.remove = s1d13xxxfb_remove,
#ifdef CONFIG_PM
.suspend = s1d13xxxfb_suspend,
.resume = s1d13xxxfb_resume,
#endif
.driver = {
.name = S1D_DEVICENAME,
},
};
static int __init
s1d13xxxfb_init(void )
{
#ifndef MODULE
if (fb_get_options("s1d13xxxfb" , NULL))
return -ENODEV;
#endif
return platform_driver_register(&s1d13xxxfb_driver);
}
static void __exit
s1d13xxxfb_exit(void )
{
platform_driver_unregister(&s1d13xxxfb_driver);
}
module_init(s1d13xxxfb_init);
module_exit(s1d13xxxfb_exit);
MODULE_LICENSE("GPL" );
MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices" );
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>" );
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