diff options
Diffstat (limited to 'drivers/video/fbdev/i740fb.c')
| -rw-r--r-- | drivers/video/fbdev/i740fb.c | 1308 |
1 files changed, 1308 insertions, 0 deletions
diff --git a/drivers/video/fbdev/i740fb.c b/drivers/video/fbdev/i740fb.c new file mode 100644 index 000000000..8fb4e01e1 --- /dev/null +++ b/drivers/video/fbdev/i740fb.c @@ -0,0 +1,1308 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * i740fb - framebuffer driver for Intel740 + * Copyright (c) 2011 Ondrej Zary + * + * Based on old i740fb driver (c) 2001-2002 Andrey Ulanov <drey@rt.mipt.ru> + * which was partially based on: + * VGA 16-color framebuffer driver (c) 1999 Ben Pfaff <pfaffben@debian.org> + * and Petr Vandrovec <VANDROVE@vc.cvut.cz> + * i740 driver from XFree86 (c) 1998-1999 Precision Insight, Inc., Cedar Park, + * Texas. + * i740fb by Patrick LERDA, v0.9 + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/i2c.h> +#include <linux/i2c-algo-bit.h> +#include <linux/console.h> +#include <video/vga.h> + +#include "i740_reg.h" + +static char *mode_option; +static int mtrr = 1; + +struct i740fb_par { + unsigned char __iomem *regs; + bool has_sgram; + int wc_cookie; + bool ddc_registered; + struct i2c_adapter ddc_adapter; + struct i2c_algo_bit_data ddc_algo; + u32 pseudo_palette[16]; + struct mutex open_lock; + unsigned int ref_count; + + u8 crtc[VGA_CRT_C]; + u8 atc[VGA_ATT_C]; + u8 gdc[VGA_GFX_C]; + u8 seq[VGA_SEQ_C]; + u8 misc; + u8 vss; + + /* i740 specific registers */ + u8 display_cntl; + u8 pixelpipe_cfg0; + u8 pixelpipe_cfg1; + u8 pixelpipe_cfg2; + u8 video_clk2_m; + u8 video_clk2_n; + u8 video_clk2_mn_msbs; + u8 video_clk2_div_sel; + u8 pll_cntl; + u8 address_mapping; + u8 io_cntl; + u8 bitblt_cntl; + u8 ext_vert_total; + u8 ext_vert_disp_end; + u8 ext_vert_sync_start; + u8 ext_vert_blank_start; + u8 ext_horiz_total; + u8 ext_horiz_blank; + u8 ext_offset; + u8 interlace_cntl; + u32 lmi_fifo_watermark; + u8 ext_start_addr; + u8 ext_start_addr_hi; +}; + +#define DACSPEED8 203 +#define DACSPEED16 163 +#define DACSPEED24_SG 136 +#define DACSPEED24_SD 128 +#define DACSPEED32 86 + +static const struct fb_fix_screeninfo i740fb_fix = { + .id = "i740fb", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_TRUECOLOR, + .xpanstep = 8, + .ypanstep = 1, + .accel = FB_ACCEL_NONE, +}; + +static inline void i740outb(struct i740fb_par *par, u16 port, u8 val) +{ + vga_mm_w(par->regs, port, val); +} +static inline u8 i740inb(struct i740fb_par *par, u16 port) +{ + return vga_mm_r(par->regs, port); +} +static inline void i740outreg(struct i740fb_par *par, u16 port, u8 reg, u8 val) +{ + vga_mm_w_fast(par->regs, port, reg, val); +} +static inline u8 i740inreg(struct i740fb_par *par, u16 port, u8 reg) +{ + vga_mm_w(par->regs, port, reg); + return vga_mm_r(par->regs, port+1); +} +static inline void i740outreg_mask(struct i740fb_par *par, u16 port, u8 reg, + u8 val, u8 mask) +{ + vga_mm_w_fast(par->regs, port, reg, (val & mask) + | (i740inreg(par, port, reg) & ~mask)); +} + +#define REG_DDC_DRIVE 0x62 +#define REG_DDC_STATE 0x63 +#define DDC_SCL (1 << 3) +#define DDC_SDA (1 << 2) + +static void i740fb_ddc_setscl(void *data, int val) +{ + struct i740fb_par *par = data; + + i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SCL, DDC_SCL); + i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SCL : 0, DDC_SCL); +} + +static void i740fb_ddc_setsda(void *data, int val) +{ + struct i740fb_par *par = data; + + i740outreg_mask(par, XRX, REG_DDC_DRIVE, DDC_SDA, DDC_SDA); + i740outreg_mask(par, XRX, REG_DDC_STATE, val ? DDC_SDA : 0, DDC_SDA); +} + +static int i740fb_ddc_getscl(void *data) +{ + struct i740fb_par *par = data; + + i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SCL); + + return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SCL); +} + +static int i740fb_ddc_getsda(void *data) +{ + struct i740fb_par *par = data; + + i740outreg_mask(par, XRX, REG_DDC_DRIVE, 0, DDC_SDA); + + return !!(i740inreg(par, XRX, REG_DDC_STATE) & DDC_SDA); +} + +static int i740fb_setup_ddc_bus(struct fb_info *info) +{ + struct i740fb_par *par = info->par; + + strlcpy(par->ddc_adapter.name, info->fix.id, + sizeof(par->ddc_adapter.name)); + par->ddc_adapter.owner = THIS_MODULE; + par->ddc_adapter.class = I2C_CLASS_DDC; + par->ddc_adapter.algo_data = &par->ddc_algo; + par->ddc_adapter.dev.parent = info->device; + par->ddc_algo.setsda = i740fb_ddc_setsda; + par->ddc_algo.setscl = i740fb_ddc_setscl; + par->ddc_algo.getsda = i740fb_ddc_getsda; + par->ddc_algo.getscl = i740fb_ddc_getscl; + par->ddc_algo.udelay = 10; + par->ddc_algo.timeout = 20; + par->ddc_algo.data = par; + + i2c_set_adapdata(&par->ddc_adapter, par); + + return i2c_bit_add_bus(&par->ddc_adapter); +} + +static int i740fb_open(struct fb_info *info, int user) +{ + struct i740fb_par *par = info->par; + + mutex_lock(&(par->open_lock)); + par->ref_count++; + mutex_unlock(&(par->open_lock)); + + return 0; +} + +static int i740fb_release(struct fb_info *info, int user) +{ + struct i740fb_par *par = info->par; + + mutex_lock(&(par->open_lock)); + if (par->ref_count == 0) { + fb_err(info, "release called with zero refcount\n"); + mutex_unlock(&(par->open_lock)); + return -EINVAL; + } + + par->ref_count--; + mutex_unlock(&(par->open_lock)); + + return 0; +} + +static u32 i740_calc_fifo(struct i740fb_par *par, u32 freq, int bpp) +{ + /* + * Would like to calculate these values automatically, but a generic + * algorithm does not seem possible. Note: These FIFO water mark + * values were tested on several cards and seem to eliminate the + * all of the snow and vertical banding, but fine adjustments will + * probably be required for other cards. + */ + + u32 wm; + + switch (bpp) { + case 8: + if (freq > 200) + wm = 0x18120000; + else if (freq > 175) + wm = 0x16110000; + else if (freq > 135) + wm = 0x120E0000; + else + wm = 0x100D0000; + break; + case 15: + case 16: + if (par->has_sgram) { + if (freq > 140) + wm = 0x2C1D0000; + else if (freq > 120) + wm = 0x2C180000; + else if (freq > 100) + wm = 0x24160000; + else if (freq > 90) + wm = 0x18120000; + else if (freq > 50) + wm = 0x16110000; + else if (freq > 32) + wm = 0x13100000; + else + wm = 0x120E0000; + } else { + if (freq > 160) + wm = 0x28200000; + else if (freq > 140) + wm = 0x2A1E0000; + else if (freq > 130) + wm = 0x2B1A0000; + else if (freq > 120) + wm = 0x2C180000; + else if (freq > 100) + wm = 0x24180000; + else if (freq > 90) + wm = 0x18120000; + else if (freq > 50) + wm = 0x16110000; + else if (freq > 32) + wm = 0x13100000; + else + wm = 0x120E0000; + } + break; + case 24: + if (par->has_sgram) { + if (freq > 130) + wm = 0x31200000; + else if (freq > 120) + wm = 0x2E200000; + else if (freq > 100) + wm = 0x2C1D0000; + else if (freq > 80) + wm = 0x25180000; + else if (freq > 64) + wm = 0x24160000; + else if (freq > 49) + wm = 0x18120000; + else if (freq > 32) + wm = 0x16110000; + else + wm = 0x13100000; + } else { + if (freq > 120) + wm = 0x311F0000; + else if (freq > 100) + wm = 0x2C1D0000; + else if (freq > 80) + wm = 0x25180000; + else if (freq > 64) + wm = 0x24160000; + else if (freq > 49) + wm = 0x18120000; + else if (freq > 32) + wm = 0x16110000; + else + wm = 0x13100000; + } + break; + case 32: + if (par->has_sgram) { + if (freq > 80) + wm = 0x2A200000; + else if (freq > 60) + wm = 0x281A0000; + else if (freq > 49) + wm = 0x25180000; + else if (freq > 32) + wm = 0x18120000; + else + wm = 0x16110000; + } else { + if (freq > 80) + wm = 0x29200000; + else if (freq > 60) + wm = 0x281A0000; + else if (freq > 49) + wm = 0x25180000; + else if (freq > 32) + wm = 0x18120000; + else + wm = 0x16110000; + } + break; + } + + return wm; +} + +/* clock calculation from i740fb by Patrick LERDA */ + +#define I740_RFREQ 1000000 +#define TARGET_MAX_N 30 +#define I740_FFIX (1 << 8) +#define I740_RFREQ_FIX (I740_RFREQ / I740_FFIX) +#define I740_REF_FREQ (6667 * I740_FFIX / 100) /* 66.67 MHz */ +#define I740_MAX_VCO_FREQ (450 * I740_FFIX) /* 450 MHz */ + +static void i740_calc_vclk(u32 freq, struct i740fb_par *par) +{ + const u32 err_max = freq / (200 * I740_RFREQ / I740_FFIX); + const u32 err_target = freq / (1000 * I740_RFREQ / I740_FFIX); + u32 err_best = 512 * I740_FFIX; + u32 f_err, f_vco; + int m_best = 0, n_best = 0, p_best = 0; + int m, n; + + p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX))); + f_vco = (freq * (1 << p_best)) / I740_RFREQ_FIX; + freq = freq / I740_RFREQ_FIX; + + n = 2; + do { + n++; + m = ((f_vco * n) / I740_REF_FREQ + 2) / 4; + + if (m < 3) + m = 3; + + { + u32 f_out = (((m * I740_REF_FREQ * 4) + / n) + ((1 << p_best) / 2)) / (1 << p_best); + + f_err = (freq - f_out); + + if (abs(f_err) < err_max) { + m_best = m; + n_best = n; + err_best = f_err; + } + } + } while ((abs(f_err) >= err_target) && + ((n <= TARGET_MAX_N) || (abs(err_best) > err_max))); + + if (abs(f_err) < err_target) { + m_best = m; + n_best = n; + } + + par->video_clk2_m = (m_best - 2) & 0xFF; + par->video_clk2_n = (n_best - 2) & 0xFF; + par->video_clk2_mn_msbs = ((((n_best - 2) >> 4) & VCO_N_MSBS) + | (((m_best - 2) >> 8) & VCO_M_MSBS)); + par->video_clk2_div_sel = ((p_best << 4) | REF_DIV_1); +} + +static int i740fb_decode_var(const struct fb_var_screeninfo *var, + struct i740fb_par *par, struct fb_info *info) +{ + /* + * Get the video params out of 'var'. + * If a value doesn't fit, round it up, if it's too big, return -EINVAL. + */ + + u32 xres, right, hslen, left, xtotal; + u32 yres, lower, vslen, upper, ytotal; + u32 vxres, xoffset, vyres, yoffset; + u32 bpp, base, dacspeed24, mem, freq; + u8 r7; + int i; + + dev_dbg(info->device, "decode_var: xres: %i, yres: %i, xres_v: %i, xres_v: %i\n", + var->xres, var->yres, var->xres_virtual, var->xres_virtual); + dev_dbg(info->device, " xoff: %i, yoff: %i, bpp: %i, graysc: %i\n", + var->xoffset, var->yoffset, var->bits_per_pixel, + var->grayscale); + dev_dbg(info->device, " activate: %i, nonstd: %i, vmode: %i\n", + var->activate, var->nonstd, var->vmode); + dev_dbg(info->device, " pixclock: %i, hsynclen:%i, vsynclen:%i\n", + var->pixclock, var->hsync_len, var->vsync_len); + dev_dbg(info->device, " left: %i, right: %i, up:%i, lower:%i\n", + var->left_margin, var->right_margin, var->upper_margin, + var->lower_margin); + + + bpp = var->bits_per_pixel; + switch (bpp) { + case 1 ... 8: + bpp = 8; + if ((1000000 / var->pixclock) > DACSPEED8) { + dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 8bpp)\n", + 1000000 / var->pixclock, DACSPEED8); + return -EINVAL; + } + break; + case 9 ... 15: + bpp = 15; + fallthrough; + case 16: + if ((1000000 / var->pixclock) > DACSPEED16) { + dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 15/16bpp)\n", + 1000000 / var->pixclock, DACSPEED16); + return -EINVAL; + } + break; + case 17 ... 24: + bpp = 24; + dacspeed24 = par->has_sgram ? DACSPEED24_SG : DACSPEED24_SD; + if ((1000000 / var->pixclock) > dacspeed24) { + dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 24bpp)\n", + 1000000 / var->pixclock, dacspeed24); + return -EINVAL; + } + break; + case 25 ... 32: + bpp = 32; + if ((1000000 / var->pixclock) > DACSPEED32) { + dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 32bpp)\n", + 1000000 / var->pixclock, DACSPEED32); + return -EINVAL; + } + break; + default: + return -EINVAL; + } + + xres = ALIGN(var->xres, 8); + vxres = ALIGN(var->xres_virtual, 16); + if (vxres < xres) + vxres = xres; + + xoffset = ALIGN(var->xoffset, 8); + if (xres + xoffset > vxres) + xoffset = vxres - xres; + + left = ALIGN(var->left_margin, 8); + right = ALIGN(var->right_margin, 8); + hslen = ALIGN(var->hsync_len, 8); + + yres = var->yres; + vyres = var->yres_virtual; + if (yres > vyres) + vyres = yres; + + yoffset = var->yoffset; + if (yres + yoffset > vyres) + yoffset = vyres - yres; + + lower = var->lower_margin; + vslen = var->vsync_len; + upper = var->upper_margin; + + mem = vxres * vyres * ((bpp + 1) / 8); + if (mem > info->screen_size) { + dev_err(info->device, "not enough video memory (%d KB requested, %ld KB available)\n", + mem >> 10, info->screen_size >> 10); + return -ENOMEM; + } + + if (yoffset + yres > vyres) + yoffset = vyres - yres; + + xtotal = xres + right + hslen + left; + ytotal = yres + lower + vslen + upper; + + par->crtc[VGA_CRTC_H_TOTAL] = (xtotal >> 3) - 5; + par->crtc[VGA_CRTC_H_DISP] = (xres >> 3) - 1; + par->crtc[VGA_CRTC_H_BLANK_START] = ((xres + right) >> 3) - 1; + par->crtc[VGA_CRTC_H_SYNC_START] = (xres + right) >> 3; + par->crtc[VGA_CRTC_H_SYNC_END] = (((xres + right + hslen) >> 3) & 0x1F) + | ((((xres + right + hslen) >> 3) & 0x20) << 2); + par->crtc[VGA_CRTC_H_BLANK_END] = ((xres + right + hslen) >> 3 & 0x1F) + | 0x80; + + par->crtc[VGA_CRTC_V_TOTAL] = ytotal - 2; + + r7 = 0x10; /* disable linecompare */ + if (ytotal & 0x100) + r7 |= 0x01; + if (ytotal & 0x200) + r7 |= 0x20; + + par->crtc[VGA_CRTC_PRESET_ROW] = 0; + par->crtc[VGA_CRTC_MAX_SCAN] = 0x40; /* 1 scanline, no linecmp */ + if (var->vmode & FB_VMODE_DOUBLE) + par->crtc[VGA_CRTC_MAX_SCAN] |= 0x80; + par->crtc[VGA_CRTC_CURSOR_START] = 0x00; + par->crtc[VGA_CRTC_CURSOR_END] = 0x00; + par->crtc[VGA_CRTC_CURSOR_HI] = 0x00; + par->crtc[VGA_CRTC_CURSOR_LO] = 0x00; + par->crtc[VGA_CRTC_V_DISP_END] = yres-1; + if ((yres-1) & 0x100) + r7 |= 0x02; + if ((yres-1) & 0x200) + r7 |= 0x40; + + par->crtc[VGA_CRTC_V_BLANK_START] = yres + lower - 1; + par->crtc[VGA_CRTC_V_SYNC_START] = yres + lower - 1; + if ((yres + lower - 1) & 0x100) + r7 |= 0x0C; + if ((yres + lower - 1) & 0x200) { + par->crtc[VGA_CRTC_MAX_SCAN] |= 0x20; + r7 |= 0x80; + } + + /* disabled IRQ */ + par->crtc[VGA_CRTC_V_SYNC_END] = + ((yres + lower - 1 + vslen) & 0x0F) & ~0x10; + /* 0x7F for VGA, but some SVGA chips require all 8 bits to be set */ + par->crtc[VGA_CRTC_V_BLANK_END] = (yres + lower - 1 + vslen) & 0xFF; + + par->crtc[VGA_CRTC_UNDERLINE] = 0x00; + par->crtc[VGA_CRTC_MODE] = 0xC3 ; + par->crtc[VGA_CRTC_LINE_COMPARE] = 0xFF; + par->crtc[VGA_CRTC_OVERFLOW] = r7; + + par->vss = 0x00; /* 3DA */ + + for (i = 0x00; i < 0x10; i++) + par->atc[i] = i; + par->atc[VGA_ATC_MODE] = 0x81; + par->atc[VGA_ATC_OVERSCAN] = 0x00; /* 0 for EGA, 0xFF for VGA */ + par->atc[VGA_ATC_PLANE_ENABLE] = 0x0F; + par->atc[VGA_ATC_COLOR_PAGE] = 0x00; + + par->misc = 0xC3; + if (var->sync & FB_SYNC_HOR_HIGH_ACT) + par->misc &= ~0x40; + if (var->sync & FB_SYNC_VERT_HIGH_ACT) + par->misc &= ~0x80; + + par->seq[VGA_SEQ_CLOCK_MODE] = 0x01; + par->seq[VGA_SEQ_PLANE_WRITE] = 0x0F; + par->seq[VGA_SEQ_CHARACTER_MAP] = 0x00; + par->seq[VGA_SEQ_MEMORY_MODE] = 0x06; + + par->gdc[VGA_GFX_SR_VALUE] = 0x00; + par->gdc[VGA_GFX_SR_ENABLE] = 0x00; + par->gdc[VGA_GFX_COMPARE_VALUE] = 0x00; + par->gdc[VGA_GFX_DATA_ROTATE] = 0x00; + par->gdc[VGA_GFX_PLANE_READ] = 0; + par->gdc[VGA_GFX_MODE] = 0x02; + par->gdc[VGA_GFX_MISC] = 0x05; + par->gdc[VGA_GFX_COMPARE_MASK] = 0x0F; + par->gdc[VGA_GFX_BIT_MASK] = 0xFF; + + base = (yoffset * vxres + (xoffset & ~7)) >> 2; + switch (bpp) { + case 8: + par->crtc[VGA_CRTC_OFFSET] = vxres >> 3; + par->ext_offset = vxres >> 11; + par->pixelpipe_cfg1 = DISPLAY_8BPP_MODE; + par->bitblt_cntl = COLEXP_8BPP; + break; + case 15: /* 0rrrrrgg gggbbbbb */ + case 16: /* rrrrrggg gggbbbbb */ + par->pixelpipe_cfg1 = (var->green.length == 6) ? + DISPLAY_16BPP_MODE : DISPLAY_15BPP_MODE; + par->crtc[VGA_CRTC_OFFSET] = vxres >> 2; + par->ext_offset = vxres >> 10; + par->bitblt_cntl = COLEXP_16BPP; + base *= 2; + break; + case 24: + par->crtc[VGA_CRTC_OFFSET] = (vxres * 3) >> 3; + par->ext_offset = (vxres * 3) >> 11; + par->pixelpipe_cfg1 = DISPLAY_24BPP_MODE; + par->bitblt_cntl = COLEXP_24BPP; + base &= 0xFFFFFFFE; /* ...ignore the last bit. */ + base *= 3; + break; + case 32: + par->crtc[VGA_CRTC_OFFSET] = vxres >> 1; + par->ext_offset = vxres >> 9; + par->pixelpipe_cfg1 = DISPLAY_32BPP_MODE; + par->bitblt_cntl = COLEXP_RESERVED; /* Unimplemented on i740 */ + base *= 4; + break; + } + + par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF; + par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >> 8; + par->ext_start_addr = + ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE; + par->ext_start_addr_hi = (base & 0x3FC00000) >> 22; + + par->pixelpipe_cfg0 = DAC_8_BIT; + + par->pixelpipe_cfg2 = DISPLAY_GAMMA_ENABLE | OVERLAY_GAMMA_ENABLE; + par->io_cntl = EXTENDED_CRTC_CNTL; + par->address_mapping = LINEAR_MODE_ENABLE | PAGE_MAPPING_ENABLE; + par->display_cntl = HIRES_MODE; + + /* Set the MCLK freq */ + par->pll_cntl = PLL_MEMCLK_100000KHZ; /* 100 MHz -- use as default */ + + /* Calculate the extended CRTC regs */ + par->ext_vert_total = (ytotal - 2) >> 8; + par->ext_vert_disp_end = (yres - 1) >> 8; + par->ext_vert_sync_start = (yres + lower) >> 8; + par->ext_vert_blank_start = (yres + lower) >> 8; + par->ext_horiz_total = ((xtotal >> 3) - 5) >> 8; + par->ext_horiz_blank = (((xres + right) >> 3) & 0x40) >> 6; + + par->interlace_cntl = INTERLACE_DISABLE; + + /* Set the overscan color to 0. (NOTE: This only affects >8bpp mode) */ + par->atc[VGA_ATC_OVERSCAN] = 0; + + /* Calculate VCLK that most closely matches the requested dot clock */ + freq = (((u32)1e9) / var->pixclock) * (u32)(1e3); + if (freq < I740_RFREQ_FIX) { + fb_dbg(info, "invalid pixclock\n"); + freq = I740_RFREQ_FIX; + } + i740_calc_vclk(freq, par); + + /* Since we program the clocks ourselves, always use VCLK2. */ + par->misc |= 0x0C; + + /* Calculate the FIFO Watermark and Burst Length. */ + par->lmi_fifo_watermark = + i740_calc_fifo(par, 1000000 / var->pixclock, bpp); + + return 0; +} + +static int i740fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + if (!var->pixclock) + return -EINVAL; + + switch (var->bits_per_pixel) { + case 8: + var->red.offset = var->green.offset = var->blue.offset = 0; + var->red.length = var->green.length = var->blue.length = 8; + break; + case 16: + switch (var->green.length) { + default: + case 5: + var->red.offset = 10; + var->green.offset = 5; + var->blue.offset = 0; + var->red.length = 5; + var->green.length = 5; + var->blue.length = 5; + break; + case 6: + var->red.offset = 11; + var->green.offset = 5; + var->blue.offset = 0; + var->red.length = var->blue.length = 5; + break; + } + break; + case 24: + var->red.offset = 16; + var->green.offset = 8; + var->blue.offset = 0; + var->red.length = var->green.length = var->blue.length = 8; + break; + case 32: + var->transp.offset = 24; + var->red.offset = 16; + var->green.offset = 8; + var->blue.offset = 0; + var->transp.length = 8; + var->red.length = var->green.length = var->blue.length = 8; + break; + default: + return -EINVAL; + } + + if (var->xres > var->xres_virtual) + var->xres_virtual = var->xres; + + if (var->yres > var->yres_virtual) + var->yres_virtual = var->yres; + + if (info->monspecs.hfmax && info->monspecs.vfmax && + info->monspecs.dclkmax && fb_validate_mode(var, info) < 0) + return -EINVAL; + + return 0; +} + +static void vga_protect(struct i740fb_par *par) +{ + /* disable the display */ + i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0x20, 0x20); + + i740inb(par, 0x3DA); + i740outb(par, VGA_ATT_W, 0x00); /* enable palette access */ +} + +static void vga_unprotect(struct i740fb_par *par) +{ + /* reenable display */ + i740outreg_mask(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, 0, 0x20); + + i740inb(par, 0x3DA); + i740outb(par, VGA_ATT_W, 0x20); /* disable palette access */ +} + +static int i740fb_set_par(struct fb_info *info) +{ + struct i740fb_par *par = info->par; + u32 itemp; + int i; + + i = i740fb_decode_var(&info->var, par, info); + if (i) + return i; + + memset(info->screen_base, 0, info->screen_size); + + vga_protect(par); + + i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_DISABLE); + + mdelay(1); + + i740outreg(par, XRX, VCLK2_VCO_M, par->video_clk2_m); + i740outreg(par, XRX, VCLK2_VCO_N, par->video_clk2_n); + i740outreg(par, XRX, VCLK2_VCO_MN_MSBS, par->video_clk2_mn_msbs); + i740outreg(par, XRX, VCLK2_VCO_DIV_SEL, par->video_clk2_div_sel); + + i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0, + par->pixelpipe_cfg0 & DAC_8_BIT, 0x80); + + i740inb(par, 0x3DA); + i740outb(par, 0x3C0, 0x00); + + /* update misc output register */ + i740outb(par, VGA_MIS_W, par->misc | 0x01); + + /* synchronous reset on */ + i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x01); + /* write sequencer registers */ + i740outreg(par, VGA_SEQ_I, VGA_SEQ_CLOCK_MODE, + par->seq[VGA_SEQ_CLOCK_MODE] | 0x20); + for (i = 2; i < VGA_SEQ_C; i++) + i740outreg(par, VGA_SEQ_I, i, par->seq[i]); + + /* synchronous reset off */ + i740outreg(par, VGA_SEQ_I, VGA_SEQ_RESET, 0x03); + + /* deprotect CRT registers 0-7 */ + i740outreg(par, VGA_CRT_IC, VGA_CRTC_V_SYNC_END, + par->crtc[VGA_CRTC_V_SYNC_END]); + + /* write CRT registers */ + for (i = 0; i < VGA_CRT_C; i++) + i740outreg(par, VGA_CRT_IC, i, par->crtc[i]); + + /* write graphics controller registers */ + for (i = 0; i < VGA_GFX_C; i++) + i740outreg(par, VGA_GFX_I, i, par->gdc[i]); + + /* write attribute controller registers */ + for (i = 0; i < VGA_ATT_C; i++) { + i740inb(par, VGA_IS1_RC); /* reset flip-flop */ + i740outb(par, VGA_ATT_IW, i); + i740outb(par, VGA_ATT_IW, par->atc[i]); + } + + i740inb(par, VGA_IS1_RC); + i740outb(par, VGA_ATT_IW, 0x20); + + i740outreg(par, VGA_CRT_IC, EXT_VERT_TOTAL, par->ext_vert_total); + i740outreg(par, VGA_CRT_IC, EXT_VERT_DISPLAY, par->ext_vert_disp_end); + i740outreg(par, VGA_CRT_IC, EXT_VERT_SYNC_START, + par->ext_vert_sync_start); + i740outreg(par, VGA_CRT_IC, EXT_VERT_BLANK_START, + par->ext_vert_blank_start); + i740outreg(par, VGA_CRT_IC, EXT_HORIZ_TOTAL, par->ext_horiz_total); + i740outreg(par, VGA_CRT_IC, EXT_HORIZ_BLANK, par->ext_horiz_blank); + i740outreg(par, VGA_CRT_IC, EXT_OFFSET, par->ext_offset); + i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI, par->ext_start_addr_hi); + i740outreg(par, VGA_CRT_IC, EXT_START_ADDR, par->ext_start_addr); + + i740outreg_mask(par, VGA_CRT_IC, INTERLACE_CNTL, + par->interlace_cntl, INTERLACE_ENABLE); + i740outreg_mask(par, XRX, ADDRESS_MAPPING, par->address_mapping, 0x1F); + i740outreg_mask(par, XRX, BITBLT_CNTL, par->bitblt_cntl, COLEXP_MODE); + i740outreg_mask(par, XRX, DISPLAY_CNTL, + par->display_cntl, VGA_WRAP_MODE | GUI_MODE); + i740outreg_mask(par, XRX, PIXPIPE_CONFIG_0, par->pixelpipe_cfg0, 0x9B); + i740outreg_mask(par, XRX, PIXPIPE_CONFIG_2, par->pixelpipe_cfg2, 0x0C); + + i740outreg(par, XRX, PLL_CNTL, par->pll_cntl); + + i740outreg_mask(par, XRX, PIXPIPE_CONFIG_1, + par->pixelpipe_cfg1, DISPLAY_COLOR_MODE); + + itemp = readl(par->regs + FWATER_BLC); + itemp &= ~(LMI_BURST_LENGTH | LMI_FIFO_WATERMARK); + itemp |= par->lmi_fifo_watermark; + writel(itemp, par->regs + FWATER_BLC); + + i740outreg(par, XRX, DRAM_EXT_CNTL, DRAM_REFRESH_60HZ); + + i740outreg_mask(par, MRX, COL_KEY_CNTL_1, 0, BLANK_DISP_OVERLAY); + i740outreg_mask(par, XRX, IO_CTNL, + par->io_cntl, EXTENDED_ATTR_CNTL | EXTENDED_CRTC_CNTL); + + if (par->pixelpipe_cfg1 != DISPLAY_8BPP_MODE) { + i740outb(par, VGA_PEL_MSK, 0xFF); + i740outb(par, VGA_PEL_IW, 0x00); + for (i = 0; i < 256; i++) { + itemp = (par->pixelpipe_cfg0 & DAC_8_BIT) ? i : i >> 2; + i740outb(par, VGA_PEL_D, itemp); + i740outb(par, VGA_PEL_D, itemp); + i740outb(par, VGA_PEL_D, itemp); + } + } + + /* Wait for screen to stabilize. */ + mdelay(50); + vga_unprotect(par); + + info->fix.line_length = + info->var.xres_virtual * info->var.bits_per_pixel / 8; + if (info->var.bits_per_pixel == 8) + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + else + info->fix.visual = FB_VISUAL_TRUECOLOR; + + return 0; +} + +static int i740fb_setcolreg(unsigned regno, unsigned red, unsigned green, + unsigned blue, unsigned transp, + struct fb_info *info) +{ + u32 r, g, b; + + dev_dbg(info->device, "setcolreg: regno: %i, red=%d, green=%d, blue=%d, transp=%d, bpp=%d\n", + regno, red, green, blue, transp, info->var.bits_per_pixel); + + switch (info->fix.visual) { + case FB_VISUAL_PSEUDOCOLOR: + if (regno >= 256) + return -EINVAL; + i740outb(info->par, VGA_PEL_IW, regno); + i740outb(info->par, VGA_PEL_D, red >> 8); + i740outb(info->par, VGA_PEL_D, green >> 8); + i740outb(info->par, VGA_PEL_D, blue >> 8); + break; + case FB_VISUAL_TRUECOLOR: + if (regno >= 16) + return -EINVAL; + r = (red >> (16 - info->var.red.length)) + << info->var.red.offset; + b = (blue >> (16 - info->var.blue.length)) + << info->var.blue.offset; + g = (green >> (16 - info->var.green.length)) + << info->var.green.offset; + ((u32 *) info->pseudo_palette)[regno] = r | g | b; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int i740fb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct i740fb_par *par = info->par; + u32 base = (var->yoffset * info->var.xres_virtual + + (var->xoffset & ~7)) >> 2; + + dev_dbg(info->device, "pan_display: xoffset: %i yoffset: %i base: %i\n", + var->xoffset, var->yoffset, base); + + switch (info->var.bits_per_pixel) { + case 8: + break; + case 15: + case 16: + base *= 2; + break; + case 24: + /* + * The last bit does not seem to have any effect on the start + * address register in 24bpp mode, so... + */ + base &= 0xFFFFFFFE; /* ...ignore the last bit. */ + base *= 3; + break; + case 32: + base *= 4; + break; + } + + par->crtc[VGA_CRTC_START_LO] = base & 0x000000FF; + par->crtc[VGA_CRTC_START_HI] = (base & 0x0000FF00) >> 8; + par->ext_start_addr_hi = (base & 0x3FC00000) >> 22; + par->ext_start_addr = + ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE; + + i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_LO, base & 0x000000FF); + i740outreg(par, VGA_CRT_IC, VGA_CRTC_START_HI, + (base & 0x0000FF00) >> 8); + i740outreg(par, VGA_CRT_IC, EXT_START_ADDR_HI, + (base & 0x3FC00000) >> 22); + i740outreg(par, VGA_CRT_IC, EXT_START_ADDR, + ((base & 0x003F0000) >> 16) | EXT_START_ADDR_ENABLE); + + return 0; +} + +static int i740fb_blank(int blank_mode, struct fb_info *info) +{ + struct i740fb_par *par = info->par; + + unsigned char SEQ01; + int DPMSSyncSelect; + + switch (blank_mode) { + case FB_BLANK_UNBLANK: + case FB_BLANK_NORMAL: + SEQ01 = 0x00; + DPMSSyncSelect = HSYNC_ON | VSYNC_ON; + break; + case FB_BLANK_VSYNC_SUSPEND: + SEQ01 = 0x20; + DPMSSyncSelect = HSYNC_ON | VSYNC_OFF; + break; + case FB_BLANK_HSYNC_SUSPEND: + SEQ01 = 0x20; + DPMSSyncSelect = HSYNC_OFF | VSYNC_ON; + break; + case FB_BLANK_POWERDOWN: + SEQ01 = 0x20; + DPMSSyncSelect = HSYNC_OFF | VSYNC_OFF; + break; + default: + return -EINVAL; + } + /* Turn the screen on/off */ + i740outb(par, SRX, 0x01); + SEQ01 |= i740inb(par, SRX + 1) & ~0x20; + i740outb(par, SRX, 0x01); + i740outb(par, SRX + 1, SEQ01); + + /* Set the DPMS mode */ + i740outreg(par, XRX, DPMS_SYNC_SELECT, DPMSSyncSelect); + + /* Let fbcon do a soft blank for us */ + return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0; +} + +static const struct fb_ops i740fb_ops = { + .owner = THIS_MODULE, + .fb_open = i740fb_open, + .fb_release = i740fb_release, + .fb_check_var = i740fb_check_var, + .fb_set_par = i740fb_set_par, + .fb_setcolreg = i740fb_setcolreg, + .fb_blank = i740fb_blank, + .fb_pan_display = i740fb_pan_display, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, +}; + +/* ------------------------------------------------------------------------- */ + +static int i740fb_probe(struct pci_dev *dev, const struct pci_device_id *ent) +{ + struct fb_info *info; + struct i740fb_par *par; + int ret, tmp; + bool found = false; + u8 *edid; + + info = framebuffer_alloc(sizeof(struct i740fb_par), &(dev->dev)); + if (!info) + return -ENOMEM; + + par = info->par; + mutex_init(&par->open_lock); + + info->var.activate = FB_ACTIVATE_NOW; + info->var.bits_per_pixel = 8; + info->fbops = &i740fb_ops; + info->pseudo_palette = par->pseudo_palette; + + ret = pci_enable_device(dev); + if (ret) { + dev_err(info->device, "cannot enable PCI device\n"); + goto err_enable_device; + } + + ret = pci_request_regions(dev, info->fix.id); + if (ret) { + dev_err(info->device, "error requesting regions\n"); + goto err_request_regions; + } + + info->screen_base = pci_ioremap_wc_bar(dev, 0); + if (!info->screen_base) { + dev_err(info->device, "error remapping base\n"); + ret = -ENOMEM; + goto err_ioremap_1; + } + + par->regs = pci_ioremap_bar(dev, 1); + if (!par->regs) { + dev_err(info->device, "error remapping MMIO\n"); + ret = -ENOMEM; + goto err_ioremap_2; + } + + /* detect memory size */ + if ((i740inreg(par, XRX, DRAM_ROW_TYPE) & DRAM_ROW_1) + == DRAM_ROW_1_SDRAM) + i740outb(par, XRX, DRAM_ROW_BNDRY_1); + else + i740outb(par, XRX, DRAM_ROW_BNDRY_0); + info->screen_size = i740inb(par, XRX + 1) * 1024 * 1024; + /* detect memory type */ + tmp = i740inreg(par, XRX, DRAM_ROW_CNTL_LO); + par->has_sgram = !((tmp & DRAM_RAS_TIMING) || + (tmp & DRAM_RAS_PRECHARGE)); + + fb_info(info, "Intel740 on %s, %ld KB %s\n", + pci_name(dev), info->screen_size >> 10, + par->has_sgram ? "SGRAM" : "SDRAM"); + + info->fix = i740fb_fix; + info->fix.mmio_start = pci_resource_start(dev, 1); + info->fix.mmio_len = pci_resource_len(dev, 1); + info->fix.smem_start = pci_resource_start(dev, 0); + info->fix.smem_len = info->screen_size; + info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; + + if (i740fb_setup_ddc_bus(info) == 0) { + par->ddc_registered = true; + edid = fb_ddc_read(&par->ddc_adapter); + if (edid) { + fb_edid_to_monspecs(edid, &info->monspecs); + kfree(edid); + if (!info->monspecs.modedb) + dev_err(info->device, + "error getting mode database\n"); + else { + const struct fb_videomode *m; + + fb_videomode_to_modelist( + info->monspecs.modedb, + info->monspecs.modedb_len, + &info->modelist); + m = fb_find_best_display(&info->monspecs, + &info->modelist); + if (m) { + fb_videomode_to_var(&info->var, m); + /* fill all other info->var's fields */ + if (!i740fb_check_var(&info->var, info)) + found = true; + } + } + } + } + + if (!mode_option && !found) + mode_option = "640x480-8@60"; + + if (mode_option) { + ret = fb_find_mode(&info->var, info, mode_option, + info->monspecs.modedb, + info->monspecs.modedb_len, + NULL, info->var.bits_per_pixel); + if (!ret || ret == 4) { + dev_err(info->device, "mode %s not found\n", + mode_option); + ret = -EINVAL; + } + } + + fb_destroy_modedb(info->monspecs.modedb); + info->monspecs.modedb = NULL; + + /* maximize virtual vertical size for fast scrolling */ + info->var.yres_virtual = info->fix.smem_len * 8 / + (info->var.bits_per_pixel * info->var.xres_virtual); + + if (ret == -EINVAL) + goto err_find_mode; + + ret = fb_alloc_cmap(&info->cmap, 256, 0); + if (ret) { + dev_err(info->device, "cannot allocate colormap\n"); + goto err_alloc_cmap; + } + + ret = register_framebuffer(info); + if (ret) { + dev_err(info->device, "error registering framebuffer\n"); + goto err_reg_framebuffer; + } + + fb_info(info, "%s frame buffer device\n", info->fix.id); + pci_set_drvdata(dev, info); + if (mtrr) + par->wc_cookie = arch_phys_wc_add(info->fix.smem_start, + info->fix.smem_len); + return 0; + +err_reg_framebuffer: + fb_dealloc_cmap(&info->cmap); +err_alloc_cmap: +err_find_mode: + if (par->ddc_registered) + i2c_del_adapter(&par->ddc_adapter); + pci_iounmap(dev, par->regs); +err_ioremap_2: + pci_iounmap(dev, info->screen_base); +err_ioremap_1: + pci_release_regions(dev); +err_request_regions: +/* pci_disable_device(dev); */ +err_enable_device: + framebuffer_release(info); + return ret; +} + +static void i740fb_remove(struct pci_dev *dev) +{ + struct fb_info *info = pci_get_drvdata(dev); + + if (info) { + struct i740fb_par *par = info->par; + arch_phys_wc_del(par->wc_cookie); + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + if (par->ddc_registered) + i2c_del_adapter(&par->ddc_adapter); + pci_iounmap(dev, par->regs); + pci_iounmap(dev, info->screen_base); + pci_release_regions(dev); +/* pci_disable_device(dev); */ + framebuffer_release(info); + } +} + +static int __maybe_unused i740fb_suspend(struct device *dev) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct i740fb_par *par = info->par; + + console_lock(); + mutex_lock(&(par->open_lock)); + + /* do nothing if framebuffer is not active */ + 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; +} + +static int __maybe_unused i740fb_resume(struct device *dev) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct i740fb_par *par = info->par; + + console_lock(); + mutex_lock(&(par->open_lock)); + + if (par->ref_count == 0) + goto fail; + + i740fb_set_par(info); + fb_set_suspend(info, 0); + +fail: + mutex_unlock(&(par->open_lock)); + console_unlock(); + return 0; +} + +static const struct dev_pm_ops i740fb_pm_ops = { +#ifdef CONFIG_PM_SLEEP + .suspend = i740fb_suspend, + .resume = i740fb_resume, + .freeze = NULL, + .thaw = i740fb_resume, + .poweroff = i740fb_suspend, + .restore = i740fb_resume, +#endif /* CONFIG_PM_SLEEP */ +}; + +#define I740_ID_PCI 0x00d1 +#define I740_ID_AGP 0x7800 + +static const struct pci_device_id i740fb_id_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_PCI) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, I740_ID_AGP) }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, i740fb_id_table); + +static struct pci_driver i740fb_driver = { + .name = "i740fb", + .id_table = i740fb_id_table, + .probe = i740fb_probe, + .remove = i740fb_remove, + .driver.pm = &i740fb_pm_ops, +}; + +#ifndef MODULE +static int __init i740fb_setup(char *options) +{ + char *opt; + + if (!options || !*options) + return 0; + + while ((opt = strsep(&options, ",")) != NULL) { + if (!*opt) + continue; + else if (!strncmp(opt, "mtrr:", 5)) + mtrr = simple_strtoul(opt + 5, NULL, 0); + else + mode_option = opt; + } + + return 0; +} +#endif + +static int __init i740fb_init(void) +{ +#ifndef MODULE + char *option = NULL; + + if (fb_get_options("i740fb", &option)) + return -ENODEV; + i740fb_setup(option); +#endif + + return pci_register_driver(&i740fb_driver); +} + +static void __exit i740fb_exit(void) +{ + pci_unregister_driver(&i740fb_driver); +} + +module_init(i740fb_init); +module_exit(i740fb_exit); + +MODULE_AUTHOR("(c) 2011 Ondrej Zary <linux@rainbow-software.org>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("fbdev driver for Intel740"); + +module_param(mode_option, charp, 0444); +MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)"); + +module_param(mtrr, int, 0444); +MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)"); |