diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/arkfb.c | 1203 |
1 files changed, 1203 insertions, 0 deletions
diff --git a/drivers/video/fbdev/arkfb.c b/drivers/video/fbdev/arkfb.c new file mode 100644 index 000000000..8d092b106 --- /dev/null +++ b/drivers/video/fbdev/arkfb.c @@ -0,0 +1,1203 @@ +/* + * linux/drivers/video/arkfb.c -- Frame buffer device driver for ARK 2000PV + * with ICS 5342 dac (it is easy to add support for different dacs). + * + * Copyright (c) 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 + */ + +#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 console_lock() */ +#include <video/vga.h> + +struct arkfb_info { + int mclk_freq; + int wc_cookie; + + struct dac_info *dac; + struct vgastate state; + struct mutex open_lock; + unsigned int ref_count; + u32 pseudo_palette[16]; +}; + + +/* ------------------------------------------------------------------------- */ + + +static const struct svga_fb_format arkfb_formats[] = { + { 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0, + FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP4, FB_VISUAL_PSEUDOCOLOR, 8, 8}, + { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 16}, + { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 1, + FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 8, 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}, + {24, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0, + FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 8, 8}, + {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 +}; + + +/* CRT timing register sets */ + +static const struct vga_regset ark_h_total_regs[] = {{0x00, 0, 7}, {0x41, 7, 7}, VGA_REGSET_END}; +static const struct vga_regset ark_h_display_regs[] = {{0x01, 0, 7}, {0x41, 6, 6}, VGA_REGSET_END}; +static const struct vga_regset ark_h_blank_start_regs[] = {{0x02, 0, 7}, {0x41, 5, 5}, VGA_REGSET_END}; +static const struct vga_regset ark_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7 }, VGA_REGSET_END}; +static const struct vga_regset ark_h_sync_start_regs[] = {{0x04, 0, 7}, {0x41, 4, 4}, VGA_REGSET_END}; +static const struct vga_regset ark_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END}; + +static const struct vga_regset ark_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x40, 7, 7}, VGA_REGSET_END}; +static const struct vga_regset ark_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x40, 6, 6}, VGA_REGSET_END}; +static const struct vga_regset ark_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x40, 5, 5}, VGA_REGSET_END}; +// const struct vga_regset ark_v_blank_end_regs[] = {{0x16, 0, 6}, VGA_REGSET_END}; +static const struct vga_regset ark_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END}; +static const struct vga_regset ark_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x40, 4, 4}, VGA_REGSET_END}; +static const struct vga_regset ark_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END}; + +static const struct vga_regset ark_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, VGA_REGSET_END}; +static const struct vga_regset ark_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x40, 0, 2}, VGA_REGSET_END}; +static const struct vga_regset ark_offset_regs[] = {{0x13, 0, 7}, {0x41, 3, 3}, VGA_REGSET_END}; + +static const struct svga_timing_regs ark_timing_regs = { + ark_h_total_regs, ark_h_display_regs, ark_h_blank_start_regs, + ark_h_blank_end_regs, ark_h_sync_start_regs, ark_h_sync_end_regs, + ark_v_total_regs, ark_v_display_regs, ark_v_blank_start_regs, + ark_v_blank_end_regs, ark_v_sync_start_regs, ark_v_sync_end_regs, +}; + + +/* ------------------------------------------------------------------------- */ + + +/* Module parameters */ + +static char *mode_option = "640x480-8@60"; + +MODULE_AUTHOR("(c) 2007 Ondrej Zajicek <santiago@crfreenet.org>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("fbdev driver for ARK 2000PV"); + +module_param(mode_option, charp, 0444); +MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)"); +module_param_named(mode, mode_option, charp, 0444); +MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc) (deprecated)"); + +static int threshold = 4; + +module_param(threshold, int, 0644); +MODULE_PARM_DESC(threshold, "FIFO threshold"); + + +/* ------------------------------------------------------------------------- */ + + +static void arkfb_settile(struct fb_info *info, struct fb_tilemap *map) +{ + const u8 *font = map->data; + u8 __iomem *fb = (u8 __iomem *)info->screen_base; + int i, c; + + if ((map->width != 8) || (map->height != 16) || + (map->depth != 1) || (map->length != 256)) { + fb_err(info, "unsupported font parameters: width %d, height %d, depth %d, length %d\n", + map->width, map->height, map->depth, map->length); + return; + } + + fb += 2; + for (c = 0; c < map->length; c++) { + for (i = 0; i < map->height; i++) { + fb_writeb(font[i], &fb[i * 4]); + fb_writeb(font[i], &fb[i * 4 + (128 * 8)]); + } + fb += 128; + + if ((c % 8) == 7) + fb += 128*8; + + font += map->height; + } +} + +static void arkfb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor) +{ + struct arkfb_info *par = info->par; + + svga_tilecursor(par->state.vgabase, info, cursor); +} + +static struct fb_tile_ops arkfb_tile_ops = { + .fb_settile = arkfb_settile, + .fb_tilecopy = svga_tilecopy, + .fb_tilefill = svga_tilefill, + .fb_tileblit = svga_tileblit, + .fb_tilecursor = arkfb_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; +} + +/* arkfb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */ +static void arkfb_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; + } + +} + +/* arkfb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */ +static void arkfb_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; +} + +/* arkfb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */ +static void arkfb_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 arkfb_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) + arkfb_iplan_imageblit(info, image); + else + arkfb_cfb4_imageblit(info, image); + } else + cfb_imageblit(info, image); +} + +static void arkfb_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)) + arkfb_iplan_fillrect(info, rect); + else + cfb_fillrect(info, rect); +} + + +/* ------------------------------------------------------------------------- */ + + +enum +{ + DAC_PSEUDO8_8, + DAC_RGB1555_8, + DAC_RGB0565_8, + DAC_RGB0888_8, + DAC_RGB8888_8, + DAC_PSEUDO8_16, + DAC_RGB1555_16, + DAC_RGB0565_16, + DAC_RGB0888_16, + DAC_RGB8888_16, + DAC_MAX +}; + +struct dac_ops { + int (*dac_get_mode)(struct dac_info *info); + int (*dac_set_mode)(struct dac_info *info, int mode); + int (*dac_get_freq)(struct dac_info *info, int channel); + int (*dac_set_freq)(struct dac_info *info, int channel, u32 freq); + void (*dac_release)(struct dac_info *info); +}; + +typedef void (*dac_read_regs_t)(void *data, u8 *code, int count); +typedef void (*dac_write_regs_t)(void *data, u8 *code, int count); + +struct dac_info +{ + struct dac_ops *dacops; + dac_read_regs_t dac_read_regs; + dac_write_regs_t dac_write_regs; + void *data; +}; + + +static inline u8 dac_read_reg(struct dac_info *info, u8 reg) +{ + u8 code[2] = {reg, 0}; + info->dac_read_regs(info->data, code, 1); + return code[1]; +} + +static inline void dac_read_regs(struct dac_info *info, u8 *code, int count) +{ + info->dac_read_regs(info->data, code, count); +} + +static inline void dac_write_reg(struct dac_info *info, u8 reg, u8 val) +{ + u8 code[2] = {reg, val}; + info->dac_write_regs(info->data, code, 1); +} + +static inline void dac_write_regs(struct dac_info *info, u8 *code, int count) +{ + info->dac_write_regs(info->data, code, count); +} + +static inline int dac_set_mode(struct dac_info *info, int mode) +{ + return info->dacops->dac_set_mode(info, mode); +} + +static inline int dac_set_freq(struct dac_info *info, int channel, u32 freq) +{ + return info->dacops->dac_set_freq(info, channel, freq); +} + +static inline void dac_release(struct dac_info *info) +{ + info->dacops->dac_release(info); +} + + +/* ------------------------------------------------------------------------- */ + + +/* ICS5342 DAC */ + +struct ics5342_info +{ + struct dac_info dac; + u8 mode; +}; + +#define DAC_PAR(info) ((struct ics5342_info *) info) + +/* LSB is set to distinguish unused slots */ +static const u8 ics5342_mode_table[DAC_MAX] = { + [DAC_PSEUDO8_8] = 0x01, [DAC_RGB1555_8] = 0x21, [DAC_RGB0565_8] = 0x61, + [DAC_RGB0888_8] = 0x41, [DAC_PSEUDO8_16] = 0x11, [DAC_RGB1555_16] = 0x31, + [DAC_RGB0565_16] = 0x51, [DAC_RGB0888_16] = 0x91, [DAC_RGB8888_16] = 0x71 +}; + +static int ics5342_set_mode(struct dac_info *info, int mode) +{ + u8 code; + + if (mode >= DAC_MAX) + return -EINVAL; + + code = ics5342_mode_table[mode]; + + if (! code) + return -EINVAL; + + dac_write_reg(info, 6, code & 0xF0); + DAC_PAR(info)->mode = mode; + + return 0; +} + +static const struct svga_pll ics5342_pll = {3, 129, 3, 33, 0, 3, + 60000, 250000, 14318}; + +/* pd4 - allow only posdivider 4 (r=2) */ +static const struct svga_pll ics5342_pll_pd4 = {3, 129, 3, 33, 2, 2, + 60000, 335000, 14318}; + +/* 270 MHz should be upper bound for VCO clock according to specs, + but that is too restrictive in pd4 case */ + +static int ics5342_set_freq(struct dac_info *info, int channel, u32 freq) +{ + u16 m, n, r; + + /* only postdivider 4 (r=2) is valid in mode DAC_PSEUDO8_16 */ + int rv = svga_compute_pll((DAC_PAR(info)->mode == DAC_PSEUDO8_16) + ? &ics5342_pll_pd4 : &ics5342_pll, + freq, &m, &n, &r, 0); + + if (rv < 0) { + return -EINVAL; + } else { + u8 code[6] = {4, 3, 5, m-2, 5, (n-2) | (r << 5)}; + dac_write_regs(info, code, 3); + return 0; + } +} + +static void ics5342_release(struct dac_info *info) +{ + ics5342_set_mode(info, DAC_PSEUDO8_8); + kfree(info); +} + +static struct dac_ops ics5342_ops = { + .dac_set_mode = ics5342_set_mode, + .dac_set_freq = ics5342_set_freq, + .dac_release = ics5342_release +}; + + +static struct dac_info * ics5342_init(dac_read_regs_t drr, dac_write_regs_t dwr, void *data) +{ + struct dac_info *info = kzalloc(sizeof(struct ics5342_info), GFP_KERNEL); + + if (! info) + return NULL; + + info->dacops = &ics5342_ops; + info->dac_read_regs = drr; + info->dac_write_regs = dwr; + info->data = data; + DAC_PAR(info)->mode = DAC_PSEUDO8_8; /* estimation */ + return info; +} + + +/* ------------------------------------------------------------------------- */ + + +static unsigned short dac_regs[4] = {0x3c8, 0x3c9, 0x3c6, 0x3c7}; + +static void ark_dac_read_regs(void *data, u8 *code, int count) +{ + struct fb_info *info = data; + struct arkfb_info *par; + u8 regval; + + par = info->par; + regval = vga_rseq(par->state.vgabase, 0x1C); + while (count != 0) + { + vga_wseq(par->state.vgabase, 0x1C, regval | (code[0] & 4 ? 0x80 : 0)); + code[1] = vga_r(par->state.vgabase, dac_regs[code[0] & 3]); + count--; + code += 2; + } + + vga_wseq(par->state.vgabase, 0x1C, regval); +} + +static void ark_dac_write_regs(void *data, u8 *code, int count) +{ + struct fb_info *info = data; + struct arkfb_info *par; + u8 regval; + + par = info->par; + regval = vga_rseq(par->state.vgabase, 0x1C); + while (count != 0) + { + vga_wseq(par->state.vgabase, 0x1C, regval | (code[0] & 4 ? 0x80 : 0)); + vga_w(par->state.vgabase, dac_regs[code[0] & 3], code[1]); + count--; + code += 2; + } + + vga_wseq(par->state.vgabase, 0x1C, regval); +} + + +static void ark_set_pixclock(struct fb_info *info, u32 pixclock) +{ + struct arkfb_info *par = info->par; + u8 regval; + + int rv = dac_set_freq(par->dac, 0, 1000000000 / pixclock); + if (rv < 0) { + fb_err(info, "cannot set requested pixclock, keeping old value\n"); + return; + } + + /* Set VGA misc register */ + regval = vga_r(par->state.vgabase, VGA_MIS_R); + vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD); +} + + +/* Open framebuffer */ + +static int arkfb_open(struct fb_info *info, int user) +{ + struct arkfb_info *par = info->par; + + mutex_lock(&(par->open_lock)); + if (par->ref_count == 0) { + void __iomem *vgabase = par->state.vgabase; + + memset(&(par->state), 0, sizeof(struct vgastate)); + par->state.vgabase = vgabase; + par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP; + par->state.num_crtc = 0x60; + par->state.num_seq = 0x30; + save_vga(&(par->state)); + } + + par->ref_count++; + mutex_unlock(&(par->open_lock)); + + return 0; +} + +/* Close framebuffer */ + +static int arkfb_release(struct fb_info *info, int user) +{ + struct arkfb_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)); + dac_set_mode(par->dac, DAC_PSEUDO8_8); + } + + par->ref_count--; + mutex_unlock(&(par->open_lock)); + + return 0; +} + +/* Validate passed in var */ + +static int arkfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + int rv, mem, step; + + /* Find appropriate format */ + rv = svga_match_format (arkfb_formats, var, NULL); + if (rv < 0) + { + fb_err(info, "unsupported mode requested\n"); + 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 = arkfb_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) + { + fb_err(info, "not enough framebuffer memory (%d kB requested, %d kB available)\n", + mem >> 10, (unsigned int) (info->screen_size >> 10)); + return -EINVAL; + } + + rv = svga_check_timings (&ark_timing_regs, var, info->node); + if (rv < 0) + { + fb_err(info, "invalid timings requested\n"); + return rv; + } + + /* Interlaced mode is broken */ + if (var->vmode & FB_VMODE_INTERLACED) + return -EINVAL; + + return 0; +} + +/* Set video mode from par */ + +static int arkfb_set_par(struct fb_info *info) +{ + struct arkfb_info *par = info->par; + u32 value, mode, hmul, hdiv, offset_value, screen_size; + u32 bpp = info->var.bits_per_pixel; + u8 regval; + + 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; + 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 = &arkfb_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; + 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_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80); + + /* Blank screen and turn off sync */ + svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20); + svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80); + + /* Set default values */ + svga_set_default_gfx_regs(par->state.vgabase); + svga_set_default_atc_regs(par->state.vgabase); + svga_set_default_seq_regs(par->state.vgabase); + svga_set_default_crt_regs(par->state.vgabase); + svga_wcrt_multi(par->state.vgabase, ark_line_compare_regs, 0xFFFFFFFF); + svga_wcrt_multi(par->state.vgabase, ark_start_address_regs, 0); + + /* ARK specific initialization */ + svga_wseq_mask(par->state.vgabase, 0x10, 0x1F, 0x1F); /* enable linear framebuffer and full memory access */ + svga_wseq_mask(par->state.vgabase, 0x12, 0x03, 0x03); /* 4 MB linear framebuffer size */ + + vga_wseq(par->state.vgabase, 0x13, info->fix.smem_start >> 16); + vga_wseq(par->state.vgabase, 0x14, info->fix.smem_start >> 24); + vga_wseq(par->state.vgabase, 0x15, 0); + vga_wseq(par->state.vgabase, 0x16, 0); + + /* Set the FIFO threshold register */ + /* It is fascinating way to store 5-bit value in 8-bit register */ + regval = 0x10 | ((threshold & 0x0E) >> 1) | (threshold & 0x01) << 7 | (threshold & 0x10) << 1; + vga_wseq(par->state.vgabase, 0x18, regval); + + /* Set the offset register */ + fb_dbg(info, "offset register : %d\n", offset_value); + svga_wcrt_multi(par->state.vgabase, ark_offset_regs, offset_value); + + /* fix for hi-res textmode */ + svga_wcrt_mask(par->state.vgabase, 0x40, 0x08, 0x08); + + if (info->var.vmode & FB_VMODE_DOUBLE) + svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80); + else + svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80); + + if (info->var.vmode & FB_VMODE_INTERLACED) + svga_wcrt_mask(par->state.vgabase, 0x44, 0x04, 0x04); + else + svga_wcrt_mask(par->state.vgabase, 0x44, 0x00, 0x04); + + hmul = 1; + hdiv = 1; + mode = svga_match_format(arkfb_formats, &(info->var), &(info->fix)); + + /* Set mode-specific register values */ + switch (mode) { + case 0: + fb_dbg(info, "text mode\n"); + svga_set_textmode_vga_regs(par->state.vgabase); + + vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */ + dac_set_mode(par->dac, DAC_PSEUDO8_8); + + break; + case 1: + fb_dbg(info, "4 bit pseudocolor\n"); + vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40); + + vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */ + dac_set_mode(par->dac, DAC_PSEUDO8_8); + break; + case 2: + fb_dbg(info, "4 bit pseudocolor, planar\n"); + + vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */ + dac_set_mode(par->dac, DAC_PSEUDO8_8); + break; + case 3: + fb_dbg(info, "8 bit pseudocolor\n"); + + vga_wseq(par->state.vgabase, 0x11, 0x16); /* 8bpp accel mode */ + + if (info->var.pixclock > 20000) { + fb_dbg(info, "not using multiplex\n"); + svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */ + dac_set_mode(par->dac, DAC_PSEUDO8_8); + } else { + fb_dbg(info, "using multiplex\n"); + svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */ + dac_set_mode(par->dac, DAC_PSEUDO8_16); + hdiv = 2; + } + break; + case 4: + fb_dbg(info, "5/5/5 truecolor\n"); + + vga_wseq(par->state.vgabase, 0x11, 0x1A); /* 16bpp accel mode */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */ + dac_set_mode(par->dac, DAC_RGB1555_16); + break; + case 5: + fb_dbg(info, "5/6/5 truecolor\n"); + + vga_wseq(par->state.vgabase, 0x11, 0x1A); /* 16bpp accel mode */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */ + dac_set_mode(par->dac, DAC_RGB0565_16); + break; + case 6: + fb_dbg(info, "8/8/8 truecolor\n"); + + vga_wseq(par->state.vgabase, 0x11, 0x16); /* 8bpp accel mode ??? */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */ + dac_set_mode(par->dac, DAC_RGB0888_16); + hmul = 3; + hdiv = 2; + break; + case 7: + fb_dbg(info, "8/8/8/8 truecolor\n"); + + vga_wseq(par->state.vgabase, 0x11, 0x1E); /* 32bpp accel mode */ + svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */ + dac_set_mode(par->dac, DAC_RGB8888_16); + hmul = 2; + break; + default: + fb_err(info, "unsupported mode - bug\n"); + return -EINVAL; + } + + value = (hdiv * info->var.pixclock) / hmul; + if (!value) { + fb_dbg(info, "invalid pixclock\n"); + value = 1; + } + ark_set_pixclock(info, value); + svga_set_timings(par->state.vgabase, &ark_timing_regs, &(info->var), hmul, hdiv, + (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, + (info->var.vmode & FB_VMODE_INTERLACED) ? 2 : 1, + hmul, info->node); + + /* Set interlaced mode start/end register */ + value = info->var.xres + info->var.left_margin + info->var.right_margin + info->var.hsync_len; + value = ((value * hmul / hdiv) / 8) - 5; + vga_wcrt(par->state.vgabase, 0x42, (value + 1) / 2); + + if (screen_size > info->screen_size) + screen_size = info->screen_size; + memset_io(info->screen_base, 0x00, screen_size); + /* Device and screen back on */ + svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80); + svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20); + + return 0; +} + +/* Set a colour register */ + +static int arkfb_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; + + if ((fb->var.bits_per_pixel == 4) && + (fb->var.nonstd == 0)) { + outb(0xF0, VGA_PEL_MSK); + outb(regno*16, VGA_PEL_IW); + } else { + 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; + + ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) | + (green & 0xFF00) | ((blue & 0xFF00) >> 8); + break; + default: + return -EINVAL; + } + + return 0; +} + +/* Set the display blanking state */ + +static int arkfb_blank(int blank_mode, struct fb_info *info) +{ + struct arkfb_info *par = info->par; + + switch (blank_mode) { + case FB_BLANK_UNBLANK: + fb_dbg(info, "unblank\n"); + svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20); + svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80); + break; + case FB_BLANK_NORMAL: + fb_dbg(info, "blank\n"); + svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20); + svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80); + break; + case FB_BLANK_POWERDOWN: + case FB_BLANK_HSYNC_SUSPEND: + case FB_BLANK_VSYNC_SUSPEND: + fb_dbg(info, "sync down\n"); + svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20); + svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80); + break; + } + return 0; +} + + +/* Pan the display */ + +static int arkfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) +{ + struct arkfb_info *par = info->par; + unsigned int offset; + + /* Calculate the offset */ + if (info->var.bits_per_pixel == 0) { + offset = (var->yoffset / 16) * (info->var.xres_virtual / 2) + + (var->xoffset / 2); + offset = offset >> 2; + } else { + offset = (var->yoffset * info->fix.line_length) + + (var->xoffset * info->var.bits_per_pixel / 8); + offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 3); + } + + /* Set the offset */ + svga_wcrt_multi(par->state.vgabase, ark_start_address_regs, offset); + + return 0; +} + + +/* ------------------------------------------------------------------------- */ + + +/* Frame buffer operations */ + +static const struct fb_ops arkfb_ops = { + .owner = THIS_MODULE, + .fb_open = arkfb_open, + .fb_release = arkfb_release, + .fb_check_var = arkfb_check_var, + .fb_set_par = arkfb_set_par, + .fb_setcolreg = arkfb_setcolreg, + .fb_blank = arkfb_blank, + .fb_pan_display = arkfb_pan_display, + .fb_fillrect = arkfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = arkfb_imageblit, + .fb_get_caps = svga_get_caps, +}; + + +/* ------------------------------------------------------------------------- */ + + +/* PCI probe */ +static int ark_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct pci_bus_region bus_reg; + struct resource vga_res; + struct fb_info *info; + struct arkfb_info *par; + int rc; + u8 regval; + + /* 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 arkfb_info), &(dev->dev)); + if (!info) + return -ENOMEM; + + par = info->par; + mutex_init(&par->open_lock); + + info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN; + info->fbops = &arkfb_ops; + + /* Prepare PCI device */ + rc = pci_enable_device(dev); + if (rc < 0) { + dev_err(info->device, "cannot enable PCI device\n"); + goto err_enable_device; + } + + rc = pci_request_regions(dev, "arkfb"); + if (rc < 0) { + dev_err(info->device, "cannot reserve framebuffer region\n"); + goto err_request_regions; + } + + par->dac = ics5342_init(ark_dac_read_regs, ark_dac_write_regs, info); + if (! par->dac) { + rc = -ENOMEM; + dev_err(info->device, "RAMDAC initialization failed\n"); + goto err_dac; + } + + info->fix.smem_start = pci_resource_start(dev, 0); + info->fix.smem_len = pci_resource_len(dev, 0); + + /* Map physical IO memory address into kernel space */ + info->screen_base = pci_iomap_wc(dev, 0, 0); + if (! info->screen_base) { + rc = -ENOMEM; + dev_err(info->device, "iomap for framebuffer failed\n"); + goto err_iomap; + } + + bus_reg.start = 0; + bus_reg.end = 64 * 1024; + + vga_res.flags = IORESOURCE_IO; + + pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg); + + par->state.vgabase = (void __iomem *) (unsigned long) vga_res.start; + + /* FIXME get memsize */ + regval = vga_rseq(par->state.vgabase, 0x10); + info->screen_size = (1 << (regval >> 6)) << 20; + info->fix.smem_len = info->screen_size; + + strcpy(info->fix.id, "ARK 2000PV"); + info->fix.mmio_start = 0; + info->fix.mmio_len = 0; + 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_option, NULL, 0, NULL, 8); + if (! ((rc == 1) || (rc == 2))) { + rc = -EINVAL; + dev_err(info->device, "mode %s not found\n", mode_option); + goto err_find_mode; + } + + rc = fb_alloc_cmap(&info->cmap, 256, 0); + if (rc < 0) { + dev_err(info->device, "cannot allocate colormap\n"); + goto err_alloc_cmap; + } + + rc = register_framebuffer(info); + if (rc < 0) { + dev_err(info->device, "cannot register framebuffer\n"); + goto err_reg_fb; + } + + fb_info(info, "%s on %s, %d MB RAM\n", + info->fix.id, pci_name(dev), info->fix.smem_len >> 20); + + /* Record a reference to the driver data */ + pci_set_drvdata(dev, info); + par->wc_cookie = arch_phys_wc_add(info->fix.smem_start, + info->fix.smem_len); + return 0; + + /* Error handling */ +err_reg_fb: + fb_dealloc_cmap(&info->cmap); +err_alloc_cmap: +err_find_mode: + pci_iounmap(dev, info->screen_base); +err_iomap: + dac_release(par->dac); +err_dac: + pci_release_regions(dev); +err_request_regions: +/* pci_disable_device(dev); */ +err_enable_device: + framebuffer_release(info); + return rc; +} + +/* PCI remove */ + +static void ark_pci_remove(struct pci_dev *dev) +{ + struct fb_info *info = pci_get_drvdata(dev); + + if (info) { + struct arkfb_info *par = info->par; + arch_phys_wc_del(par->wc_cookie); + dac_release(par->dac); + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + + pci_iounmap(dev, info->screen_base); + pci_release_regions(dev); +/* pci_disable_device(dev); */ + + framebuffer_release(info); + } +} + + +/* PCI suspend */ + +static int __maybe_unused ark_pci_suspend(struct device *dev) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct arkfb_info *par = info->par; + + dev_info(info->device, "suspend\n"); + + console_lock(); + mutex_lock(&(par->open_lock)); + + if (par->ref_count == 0) { + mutex_unlock(&(par->open_lock)); + console_unlock(); + return 0; + } + + fb_set_suspend(info, 1); + + mutex_unlock(&(par->open_lock)); + console_unlock(); + + return 0; +} + + +/* PCI resume */ + +static int __maybe_unused ark_pci_resume(struct device *dev) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct arkfb_info *par = info->par; + + dev_info(info->device, "resume\n"); + + console_lock(); + mutex_lock(&(par->open_lock)); + + if (par->ref_count == 0) + goto fail; + + arkfb_set_par(info); + fb_set_suspend(info, 0); + +fail: + mutex_unlock(&(par->open_lock)); + console_unlock(); + return 0; +} + +static const struct dev_pm_ops ark_pci_pm_ops = { +#ifdef CONFIG_PM_SLEEP + .suspend = ark_pci_suspend, + .resume = ark_pci_resume, + .freeze = NULL, + .thaw = ark_pci_resume, + .poweroff = ark_pci_suspend, + .restore = ark_pci_resume, +#endif +}; + +/* List of boards that we are trying to support */ + +static const struct pci_device_id ark_devices[] = { + {PCI_DEVICE(0xEDD8, 0xA099)}, + {0, 0, 0, 0, 0, 0, 0} +}; + + +MODULE_DEVICE_TABLE(pci, ark_devices); + +static struct pci_driver arkfb_pci_driver = { + .name = "arkfb", + .id_table = ark_devices, + .probe = ark_pci_probe, + .remove = ark_pci_remove, + .driver.pm = &ark_pci_pm_ops, +}; + +/* Cleanup */ + +static void __exit arkfb_cleanup(void) +{ + pr_debug("arkfb: cleaning up\n"); + pci_unregister_driver(&arkfb_pci_driver); +} + +/* Driver Initialisation */ + +static int __init arkfb_init(void) +{ + +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("arkfb", &option)) + return -ENODEV; + + if (option && *option) + mode_option = option; +#endif + + pr_debug("arkfb: initializing\n"); + return pci_register_driver(&arkfb_pci_driver); +} + +module_init(arkfb_init); +module_exit(arkfb_cleanup); |