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Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/s1d13xxxfb.c | 1035 |
1 files changed, 1035 insertions, 0 deletions
diff --git a/drivers/video/fbdev/s1d13xxxfb.c b/drivers/video/fbdev/s1d13xxxfb.c new file mode 100644 index 000000000..4541afcf9 --- /dev/null +++ b/drivers/video/fbdev/s1d13xxxfb.c @@ -0,0 +1,1035 @@ +/* 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 { } while (0) +#endif + +/* + * 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, + 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 |= 0x01; + else + mode &= ~0x01; + + 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 |= 0x02; + else + mode &= ~0x02; + + 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 & 0x01)) /* 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 &= ~0x07; + + 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 & 0x01)) /* 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 & 0x01) != 0) + lcd_enable(par, 1); + if ((par->display & 0x02) != 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 & 0x01)) { + /* LCD */ + s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff)); + s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff)); + s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f)); + } else { + /* CRT */ + s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff)); + s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff)); + s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f)); + } + + 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 & 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 address */ + 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_setcolreg = s1d13xxxfb_setcolreg, + .fb_blank = s1d13xxxfb_blank, + + .fb_pan_display = s1d13xxxfb_pan_display, + + /* gets replaced at chip detection time */ + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, +}; + +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 & 0x02) != 0; + lcd_enabled = (par->display & 0x01) != 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 & 0x07; + + 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 & 0x04) != 0; + is_dual = (panel & 0x02) != 0; + is_tft = (panel & 0x01) != 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) & 0x03) << 8) + 1); + + offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) + + ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 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) & 0x03) << 8) + 1); + + offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) + + ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 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, 0x00); + s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11); + 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 int s1d13xxxfb_remove(struct platform_device *pdev) +{ + struct fb_info *info = platform_get_drvdata(pdev); + + unregister_framebuffer(info); + __s1d13xxxfb_remove(pdev); + return 0; +} + +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) & 0x3; + 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; + 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) + 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, 0x11); + + 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, 0x10); + + /* do not let go until SDRAM "wakes up" */ + while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01)) + 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 & 0x01) != 0) + lcd_enable(s1dfb, 1); + if ((s1dfb->display & 0x02) != 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>"); |