diff options
Diffstat (limited to 'drivers/video/vt8623fb.c')
| -rw-r--r-- | drivers/video/vt8623fb.c | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/drivers/video/vt8623fb.c b/drivers/video/vt8623fb.c new file mode 100644 index 0000000..5e9755e --- /dev/null +++ b/drivers/video/vt8623fb.c @@ -0,0 +1,927 @@ +/* + * linux/drivers/video/vt8623fb.c - fbdev driver for + * integrated graphic core in VIA VT8623 [CLE266] chipset + * + * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org> + * + * 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. + * + * Code is based on s3fb, some parts are from David Boucher's viafb + * (http://davesdomain.org.uk/viafb/) + */ + +#include <linux/version.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/delay.h> +#include <linux/fb.h> +#include <linux/svga.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */ +#include <video/vga.h> + +#ifdef CONFIG_MTRR +#include <asm/mtrr.h> +#endif + +struct vt8623fb_info { + char __iomem *mmio_base; + int mtrr_reg; + struct vgastate state; + struct mutex open_lock; + unsigned int ref_count; + u32 pseudo_palette[16]; +}; + + + +/* ------------------------------------------------------------------------- */ + +static const struct svga_fb_format vt8623fb_formats[] = { + { 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0, + FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8, FB_VISUAL_PSEUDOCOLOR, 16, 16}, + { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 16, 16}, + { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 1, + FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 16, 16}, + { 8, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 8}, +/* {16, {10, 5, 0}, {5, 5, 0}, {0, 5, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4}, */ + {16, {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4}, + {32, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 2}, + SVGA_FORMAT_END +}; + +static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3, + 60000, 300000, 14318}; + +/* CRT timing register sets */ + +struct vga_regset vt8623_h_total_regs[] = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END}; +struct vga_regset vt8623_h_display_regs[] = {{0x01, 0, 7}, VGA_REGSET_END}; +struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END}; +struct vga_regset vt8623_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END}; +struct vga_regset vt8623_h_sync_start_regs[] = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END}; +struct vga_regset vt8623_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END}; + +struct vga_regset vt8623_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END}; +struct vga_regset vt8623_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END}; +struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END}; +struct vga_regset vt8623_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END}; +struct vga_regset vt8623_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END}; +struct vga_regset vt8623_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END}; + +struct vga_regset vt8623_offset_regs[] = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END}; +struct vga_regset vt8623_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END}; +struct vga_regset vt8623_fetch_count_regs[] = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END}; +struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END}; + +struct svga_timing_regs vt8623_timing_regs = { + vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs, + vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs, + vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs, + vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs, +}; + + +/* ------------------------------------------------------------------------- */ + + +/* Module parameters */ + +static char *mode = "640x480-8@60"; + +#ifdef CONFIG_MTRR +static int mtrr = 1; +#endif + +MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]"); + +module_param(mode, charp, 0644); +MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc)"); + +#ifdef CONFIG_MTRR +module_param(mtrr, int, 0444); +MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)"); +#endif + + +/* ------------------------------------------------------------------------- */ + + +static struct fb_tile_ops vt8623fb_tile_ops = { + .fb_settile = svga_settile, + .fb_tilecopy = svga_tilecopy, + .fb_tilefill = svga_tilefill, + .fb_tileblit = svga_tileblit, + .fb_tilecursor = svga_tilecursor, + .fb_get_tilemax = svga_get_tilemax, +}; + + +/* ------------------------------------------------------------------------- */ + + +/* image data is MSB-first, fb structure is MSB-first too */ +static inline u32 expand_color(u32 c) +{ + return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF; +} + +/* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */ +static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image) +{ + u32 fg = expand_color(image->fg_color); + u32 bg = expand_color(image->bg_color); + const u8 *src1, *src; + u8 __iomem *dst1; + u32 __iomem *dst; + u32 val; + int x, y; + + src1 = image->data; + dst1 = info->screen_base + (image->dy * info->fix.line_length) + + ((image->dx / 8) * 4); + + for (y = 0; y < image->height; y++) { + src = src1; + dst = (u32 __iomem *) dst1; + for (x = 0; x < image->width; x += 8) { + val = *(src++) * 0x01010101; + val = (val & fg) | (~val & bg); + fb_writel(val, dst++); + } + src1 += image->width / 8; + dst1 += info->fix.line_length; + } +} + +/* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */ +static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect) +{ + u32 fg = expand_color(rect->color); + u8 __iomem *dst1; + u32 __iomem *dst; + int x, y; + + dst1 = info->screen_base + (rect->dy * info->fix.line_length) + + ((rect->dx / 8) * 4); + + for (y = 0; y < rect->height; y++) { + dst = (u32 __iomem *) dst1; + for (x = 0; x < rect->width; x += 8) { + fb_writel(fg, dst++); + } + dst1 += info->fix.line_length; + } +} + + +/* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */ +static inline u32 expand_pixel(u32 c) +{ + return (((c & 1) << 24) | ((c & 2) << 27) | ((c & 4) << 14) | ((c & 8) << 17) | + ((c & 16) << 4) | ((c & 32) << 7) | ((c & 64) >> 6) | ((c & 128) >> 3)) * 0xF; +} + +/* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */ +static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image) +{ + u32 fg = image->fg_color * 0x11111111; + u32 bg = image->bg_color * 0x11111111; + const u8 *src1, *src; + u8 __iomem *dst1; + u32 __iomem *dst; + u32 val; + int x, y; + + src1 = image->data; + dst1 = info->screen_base + (image->dy * info->fix.line_length) + + ((image->dx / 8) * 4); + + for (y = 0; y < image->height; y++) { + src = src1; + dst = (u32 __iomem *) dst1; + for (x = 0; x < image->width; x += 8) { + val = expand_pixel(*(src++)); + val = (val & fg) | (~val & bg); + fb_writel(val, dst++); + } + src1 += image->width / 8; + dst1 += info->fix.line_length; + } +} + +static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image) +{ + if ((info->var.bits_per_pixel == 4) && (image->depth == 1) + && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) { + if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES) + vt8623fb_iplan_imageblit(info, image); + else + vt8623fb_cfb4_imageblit(info, image); + } else + cfb_imageblit(info, image); +} + +static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) +{ + if ((info->var.bits_per_pixel == 4) + && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0) + && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)) + vt8623fb_iplan_fillrect(info, rect); + else + cfb_fillrect(info, rect); +} + + +/* ------------------------------------------------------------------------- */ + + +static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock) +{ + u16 m, n, r; + u8 regval; + int rv; + + rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node); + if (rv < 0) { + printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node); + return; + } + + /* Set VGA misc register */ + regval = vga_r(NULL, VGA_MIS_R); + vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD); + + /* Set clock registers */ + vga_wseq(NULL, 0x46, (n | (r << 6))); + vga_wseq(NULL, 0x47, m); + + udelay(1000); + + /* PLL reset */ + svga_wseq_mask(0x40, 0x02, 0x02); + svga_wseq_mask(0x40, 0x00, 0x02); +} + + +static int vt8623fb_open(struct fb_info *info, int user) +{ + struct vt8623fb_info *par = info->par; + + mutex_lock(&(par->open_lock)); + if (par->ref_count == 0) { + memset(&(par->state), 0, sizeof(struct vgastate)); + par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP; + par->state.num_crtc = 0xA2; + par->state.num_seq = 0x50; + save_vga(&(par->state)); + } + + par->ref_count++; + mutex_unlock(&(par->open_lock)); + + return 0; +} + +static int vt8623fb_release(struct fb_info *info, int user) +{ + struct vt8623fb_info *par = info->par; + + mutex_lock(&(par->open_lock)); + if (par->ref_count == 0) { + mutex_unlock(&(par->open_lock)); + return -EINVAL; + } + + if (par->ref_count == 1) + restore_vga(&(par->state)); + + par->ref_count--; + mutex_unlock(&(par->open_lock)); + + return 0; +} + +static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + int rv, mem, step; + + /* Find appropriate format */ + rv = svga_match_format (vt8623fb_formats, var, NULL); + if (rv < 0) + { + printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node); + return rv; + } + + /* Do not allow to have real resoulution larger than virtual */ + if (var->xres > var->xres_virtual) + var->xres_virtual = var->xres; + + if (var->yres > var->yres_virtual) + var->yres_virtual = var->yres; + + /* Round up xres_virtual to have proper alignment of lines */ + step = vt8623fb_formats[rv].xresstep - 1; + var->xres_virtual = (var->xres_virtual+step) & ~step; + + /* Check whether have enough memory */ + mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual; + if (mem > info->screen_size) + { + printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n", info->node, mem >> 10, (unsigned int) (info->screen_size >> 10)); + return -EINVAL; + } + + /* Text mode is limited to 256 kB of memory */ + if ((var->bits_per_pixel == 0) && (mem > (256*1024))) + { + printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10); + return -EINVAL; + } + + rv = svga_check_timings (&vt8623_timing_regs, var, info->node); + if (rv < 0) + { + printk(KERN_ERR "fb%d: invalid timings requested\n", info->node); + return rv; + } + + /* Interlaced mode not supported */ + if (var->vmode & FB_VMODE_INTERLACED) + return -EINVAL; + + return 0; +} + + +static int vt8623fb_set_par(struct fb_info *info) +{ + u32 mode, offset_value, fetch_value, screen_size; + u32 bpp = info->var.bits_per_pixel; + + if (bpp != 0) { + info->fix.ypanstep = 1; + info->fix.line_length = (info->var.xres_virtual * bpp) / 8; + + info->flags &= ~FBINFO_MISC_TILEBLITTING; + info->tileops = NULL; + + /* in 4bpp supports 8p wide tiles only, any tiles otherwise */ + info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0); + info->pixmap.blit_y = ~(u32)0; + + offset_value = (info->var.xres_virtual * bpp) / 64; + fetch_value = ((info->var.xres * bpp) / 128) + 4; + + if (bpp == 4) + fetch_value = (info->var.xres / 8) + 8; /* + 0 is OK */ + + screen_size = info->var.yres_virtual * info->fix.line_length; + } else { + info->fix.ypanstep = 16; + info->fix.line_length = 0; + + info->flags |= FBINFO_MISC_TILEBLITTING; + info->tileops = &vt8623fb_tile_ops; + + /* supports 8x16 tiles only */ + info->pixmap.blit_x = 1 << (8 - 1); + info->pixmap.blit_y = 1 << (16 - 1); + + offset_value = info->var.xres_virtual / 16; + fetch_value = (info->var.xres / 8) + 8; + screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64; + } + + info->var.xoffset = 0; + info->var.yoffset = 0; + info->var.activate = FB_ACTIVATE_NOW; + + /* Unlock registers */ + svga_wseq_mask(0x10, 0x01, 0x01); + svga_wcrt_mask(0x11, 0x00, 0x80); + svga_wcrt_mask(0x47, 0x00, 0x01); + + /* Device, screen and sync off */ + svga_wseq_mask(0x01, 0x20, 0x20); + svga_wcrt_mask(0x36, 0x30, 0x30); + svga_wcrt_mask(0x17, 0x00, 0x80); + + /* Set default values */ + svga_set_default_gfx_regs(); + svga_set_default_atc_regs(); + svga_set_default_seq_regs(); + svga_set_default_crt_regs(); + svga_wcrt_multi(vt8623_line_compare_regs, 0xFFFFFFFF); + svga_wcrt_multi(vt8623_start_address_regs, 0); + + svga_wcrt_multi(vt8623_offset_regs, offset_value); + svga_wseq_multi(vt8623_fetch_count_regs, fetch_value); + + if (info->var.vmode & FB_VMODE_DOUBLE) + svga_wcrt_mask(0x09, 0x80, 0x80); + else + svga_wcrt_mask(0x09, 0x00, 0x80); + + svga_wseq_mask(0x1E, 0xF0, 0xF0); // DI/DVP bus + svga_wseq_mask(0x2A, 0x0F, 0x0F); // DI/DVP bus + svga_wseq_mask(0x16, 0x08, 0xBF); // FIFO read treshold + vga_wseq(NULL, 0x17, 0x1F); // FIFO depth + vga_wseq(NULL, 0x18, 0x4E); + svga_wseq_mask(0x1A, 0x08, 0x08); // enable MMIO ? + + vga_wcrt(NULL, 0x32, 0x00); + vga_wcrt(NULL, 0x34, 0x00); + vga_wcrt(NULL, 0x6A, 0x80); + vga_wcrt(NULL, 0x6A, 0xC0); + + vga_wgfx(NULL, 0x20, 0x00); + vga_wgfx(NULL, 0x21, 0x00); + vga_wgfx(NULL, 0x22, 0x00); + + /* Set SR15 according to number of bits per pixel */ + mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix)); + switch (mode) { + case 0: + pr_debug("fb%d: text mode\n", info->node); + svga_set_textmode_vga_regs(); + svga_wseq_mask(0x15, 0x00, 0xFE); + svga_wcrt_mask(0x11, 0x60, 0x70); + break; + case 1: + pr_debug("fb%d: 4 bit pseudocolor\n", info->node); + vga_wgfx(NULL, VGA_GFX_MODE, 0x40); + svga_wseq_mask(0x15, 0x20, 0xFE); + svga_wcrt_mask(0x11, 0x00, 0x70); + break; + case 2: + pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node); + svga_wseq_mask(0x15, 0x00, 0xFE); + svga_wcrt_mask(0x11, 0x00, 0x70); + break; + case 3: + pr_debug("fb%d: 8 bit pseudocolor\n", info->node); + svga_wseq_mask(0x15, 0x22, 0xFE); + break; + case 4: + pr_debug("fb%d: 5/6/5 truecolor\n", info->node); + svga_wseq_mask(0x15, 0xB6, 0xFE); + break; + case 5: + pr_debug("fb%d: 8/8/8 truecolor\n", info->node); + svga_wseq_mask(0x15, 0xAE, 0xFE); + break; + default: + printk(KERN_ERR "vt8623fb: unsupported mode - bug\n"); + return (-EINVAL); + } + + vt8623_set_pixclock(info, info->var.pixclock); + svga_set_timings(&vt8623_timing_regs, &(info->var), 1, 1, + (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1, + 1, info->node); + + memset_io(info->screen_base, 0x00, screen_size); + + /* Device and screen back on */ + svga_wcrt_mask(0x17, 0x80, 0x80); + svga_wcrt_mask(0x36, 0x00, 0x30); + svga_wseq_mask(0x01, 0x00, 0x20); + + return 0; +} + + +static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *fb) +{ + switch (fb->var.bits_per_pixel) { + case 0: + case 4: + if (regno >= 16) + return -EINVAL; + + outb(0x0F, VGA_PEL_MSK); + outb(regno, VGA_PEL_IW); + outb(red >> 10, VGA_PEL_D); + outb(green >> 10, VGA_PEL_D); + outb(blue >> 10, VGA_PEL_D); + break; + case 8: + if (regno >= 256) + return -EINVAL; + + outb(0xFF, VGA_PEL_MSK); + outb(regno, VGA_PEL_IW); + outb(red >> 10, VGA_PEL_D); + outb(green >> 10, VGA_PEL_D); + outb(blue >> 10, VGA_PEL_D); + break; + case 16: + if (regno >= 16) + return 0; + + if (fb->var.green.length == 5) + ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) | + ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11); + else if (fb->var.green.length == 6) + ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) | + ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11); + else + return -EINVAL; + break; + case 24: + case 32: + if (regno >= 16) + return 0; + + /* ((transp & 0xFF00) << 16) */ + ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) | + (green & 0xFF00) | ((blue & 0xFF00) >> 8); + break; + default: + return -EINVAL; + } + + return 0; +} + + +static int vt8623fb_blank(int blank_mode, struct fb_info *info) +{ + switch (blank_mode) { + case FB_BLANK_UNBLANK: + pr_debug("fb%d: unblank\n", info->node); + svga_wcrt_mask(0x36, 0x00, 0x30); + svga_wseq_mask(0x01, 0x00, 0x20); + break; + case FB_BLANK_NORMAL: + pr_debug("fb%d: blank\n", info->node); + svga_wcrt_mask(0x36, 0x00, 0x30); + svga_wseq_mask(0x01, 0x20, 0x20); + break; + case FB_BLANK_HSYNC_SUSPEND: + pr_debug("fb%d: DPMS standby (hsync off)\n", info->node); + svga_wcrt_mask(0x36, 0x10, 0x30); + svga_wseq_mask(0x01, 0x20, 0x20); + break; + case FB_BLANK_VSYNC_SUSPEND: + pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node); + svga_wcrt_mask(0x36, 0x20, 0x30); + svga_wseq_mask(0x01, 0x20, 0x20); + break; + case FB_BLANK_POWERDOWN: + pr_debug("fb%d: DPMS off (no sync)\n", info->node); + svga_wcrt_mask(0x36, 0x30, 0x30); + svga_wseq_mask(0x01, 0x20, 0x20); + break; + } + + return 0; +} + + +static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) +{ + unsigned int offset; + + /* Calculate the offset */ + if (var->bits_per_pixel == 0) { + offset = (var->yoffset / 16) * var->xres_virtual + var->xoffset; + offset = offset >> 3; + } else { + offset = (var->yoffset * info->fix.line_length) + + (var->xoffset * var->bits_per_pixel / 8); + offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1); + } + + /* Set the offset */ + svga_wcrt_multi(vt8623_start_address_regs, offset); + + return 0; +} + + +/* ------------------------------------------------------------------------- */ + + +/* Frame buffer operations */ + +static struct fb_ops vt8623fb_ops = { + .owner = THIS_MODULE, + .fb_open = vt8623fb_open, + .fb_release = vt8623fb_release, + .fb_check_var = vt8623fb_check_var, + .fb_set_par = vt8623fb_set_par, + .fb_setcolreg = vt8623fb_setcolreg, + .fb_blank = vt8623fb_blank, + .fb_pan_display = vt8623fb_pan_display, + .fb_fillrect = vt8623fb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = vt8623fb_imageblit, + .fb_get_caps = svga_get_caps, +}; + + +/* PCI probe */ + +static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct fb_info *info; + struct vt8623fb_info *par; + unsigned int memsize1, memsize2; + int rc; + + /* Ignore secondary VGA device because there is no VGA arbitration */ + if (! svga_primary_device(dev)) { + dev_info(&(dev->dev), "ignoring secondary device\n"); + return -ENODEV; + } + + /* Allocate and fill driver data structure */ + info = framebuffer_alloc(sizeof(struct vt8623fb_info), NULL); + if (! info) { + dev_err(&(dev->dev), "cannot allocate memory\n"); + return -ENOMEM; + } + + par = info->par; + mutex_init(&par->open_lock); + + info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN; + info->fbops = &vt8623fb_ops; + + /* Prepare PCI device */ + + rc = pci_enable_device(dev); + if (rc < 0) { + dev_err(&(dev->dev), "cannot enable PCI device\n"); + goto err_enable_device; + } + + rc = pci_request_regions(dev, "vt8623fb"); + if (rc < 0) { + dev_err(&(dev->dev), "cannot reserve framebuffer region\n"); + goto err_request_regions; + } + + info->fix.smem_start = pci_resource_start(dev, 0); + info->fix.smem_len = pci_resource_len(dev, 0); + info->fix.mmio_start = pci_resource_start(dev, 1); + info->fix.mmio_len = pci_resource_len(dev, 1); + + /* Map physical IO memory address into kernel space */ + info->screen_base = pci_iomap(dev, 0, 0); + if (! info->screen_base) { + rc = -ENOMEM; + dev_err(&(dev->dev), "iomap for framebuffer failed\n"); + goto err_iomap_1; + } + + par->mmio_base = pci_iomap(dev, 1, 0); + if (! par->mmio_base) { + rc = -ENOMEM; + dev_err(&(dev->dev), "iomap for MMIO failed\n"); + goto err_iomap_2; + } + + /* Find how many physical memory there is on card */ + memsize1 = (vga_rseq(NULL, 0x34) + 1) >> 1; + memsize2 = vga_rseq(NULL, 0x39) << 2; + + if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2)) + info->screen_size = memsize1 << 20; + else { + dev_err(&(dev->dev), "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2); + info->screen_size = 16 << 20; + } + + info->fix.smem_len = info->screen_size; + strcpy(info->fix.id, "VIA VT8623"); + info->fix.type = FB_TYPE_PACKED_PIXELS; + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + info->fix.ypanstep = 0; + info->fix.accel = FB_ACCEL_NONE; + info->pseudo_palette = (void*)par->pseudo_palette; + + /* Prepare startup mode */ + + rc = fb_find_mode(&(info->var), info, mode, NULL, 0, NULL, 8); + if (! ((rc == 1) || (rc == 2))) { + rc = -EINVAL; + dev_err(&(dev->dev), "mode %s not found\n", mode); + goto err_find_mode; + } + + rc = fb_alloc_cmap(&info->cmap, 256, 0); + if (rc < 0) { + dev_err(&(dev->dev), "cannot allocate colormap\n"); + goto err_alloc_cmap; + } + + rc = register_framebuffer(info); + if (rc < 0) { + dev_err(&(dev->dev), "cannot register framebugger\n"); + goto err_reg_fb; + } + + printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id, + pci_name(dev), info->fix.smem_len >> 20); + + /* Record a reference to the driver data */ + pci_set_drvdata(dev, info); + +#ifdef CONFIG_MTRR + if (mtrr) { + par->mtrr_reg = -1; + par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1); + } +#endif + + return 0; + + /* Error handling */ +err_reg_fb: + fb_dealloc_cmap(&info->cmap); +err_alloc_cmap: +err_find_mode: + pci_iounmap(dev, par->mmio_base); +err_iomap_2: + pci_iounmap(dev, info->screen_base); +err_iomap_1: + pci_release_regions(dev); +err_request_regions: +/* pci_disable_device(dev); */ +err_enable_device: + framebuffer_release(info); + return rc; +} + +/* PCI remove */ + +static void __devexit vt8623_pci_remove(struct pci_dev *dev) +{ + struct fb_info *info = pci_get_drvdata(dev); + struct vt8623fb_info *par = info->par; + + if (info) { +#ifdef CONFIG_MTRR + if (par->mtrr_reg >= 0) { + mtrr_del(par->mtrr_reg, 0, 0); + par->mtrr_reg = -1; + } +#endif + + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + + pci_iounmap(dev, info->screen_base); + pci_iounmap(dev, par->mmio_base); + pci_release_regions(dev); +/* pci_disable_device(dev); */ + + pci_set_drvdata(dev, NULL); + framebuffer_release(info); + } +} + + +#ifdef CONFIG_PM +/* PCI suspend */ + +static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state) +{ + struct fb_info *info = pci_get_drvdata(dev); + struct vt8623fb_info *par = info->par; + + dev_info(&(dev->dev), "suspend\n"); + + acquire_console_sem(); + mutex_lock(&(par->open_lock)); + + if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) { + mutex_unlock(&(par->open_lock)); + release_console_sem(); + return 0; + } + + fb_set_suspend(info, 1); + + pci_save_state(dev); + pci_disable_device(dev); + pci_set_power_state(dev, pci_choose_state(dev, state)); + + mutex_unlock(&(par->open_lock)); + release_console_sem(); + + return 0; +} + + +/* PCI resume */ + +static int vt8623_pci_resume(struct pci_dev* dev) +{ + struct fb_info *info = pci_get_drvdata(dev); + struct vt8623fb_info *par = info->par; + + dev_info(&(dev->dev), "resume\n"); + + acquire_console_sem(); + mutex_lock(&(par->open_lock)); + + if (par->ref_count == 0) { + mutex_unlock(&(par->open_lock)); + release_console_sem(); + return 0; + } + + pci_set_power_state(dev, PCI_D0); + pci_restore_state(dev); + + if (pci_enable_device(dev)) + goto fail; + + pci_set_master(dev); + + vt8623fb_set_par(info); + fb_set_suspend(info, 0); + + mutex_unlock(&(par->open_lock)); +fail: + release_console_sem(); + + return 0; +} +#else +#define vt8623_pci_suspend NULL +#define vt8623_pci_resume NULL +#endif /* CONFIG_PM */ + +/* List of boards that we are trying to support */ + +static struct pci_device_id vt8623_devices[] __devinitdata = { + {PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)}, + {0, 0, 0, 0, 0, 0, 0} +}; + +MODULE_DEVICE_TABLE(pci, vt8623_devices); + +static struct pci_driver vt8623fb_pci_driver = { + .name = "vt8623fb", + .id_table = vt8623_devices, + .probe = vt8623_pci_probe, + .remove = __devexit_p(vt8623_pci_remove), + .suspend = vt8623_pci_suspend, + .resume = vt8623_pci_resume, +}; + +/* Cleanup */ + +static void __exit vt8623fb_cleanup(void) +{ + pr_debug("vt8623fb: cleaning up\n"); + pci_unregister_driver(&vt8623fb_pci_driver); +} + +/* Driver Initialisation */ + +int __init vt8623fb_init(void) +{ + +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("vt8623fb", &option)) + return -ENODEV; + + if (option && *option) + mode = option; +#endif + + pr_debug("vt8623fb: initializing\n"); + return pci_register_driver(&vt8623fb_pci_driver); +} + +/* ------------------------------------------------------------------------- */ + +/* Modularization */ + +module_init(vt8623fb_init); +module_exit(vt8623fb_cleanup); |