diff options
Diffstat (limited to 'drivers/video/fbdev/intelfb/intelfbhw.c')
| -rw-r--r-- | drivers/video/fbdev/intelfb/intelfbhw.c | 2115 |
1 files changed, 2115 insertions, 0 deletions
diff --git a/drivers/video/fbdev/intelfb/intelfbhw.c b/drivers/video/fbdev/intelfb/intelfbhw.c new file mode 100644 index 000000000..2086e0653 --- /dev/null +++ b/drivers/video/fbdev/intelfb/intelfbhw.c @@ -0,0 +1,2115 @@ +/* + * intelfb + * + * Linux framebuffer driver for Intel(R) 865G integrated graphics chips. + * + * Copyright © 2002, 2003 David Dawes <dawes@xfree86.org> + * 2004 Sylvain Meyer + * + * This driver consists of two parts. The first part (intelfbdrv.c) provides + * the basic fbdev interfaces, is derived in part from the radeonfb and + * vesafb drivers, and is covered by the GPL. The second part (intelfbhw.c) + * provides the code to program the hardware. Most of it is derived from + * the i810/i830 XFree86 driver. The HW-specific code is covered here + * under a dual license (GPL and MIT/XFree86 license). + * + * Author: David Dawes + * + */ + +/* $DHD: intelfb/intelfbhw.c,v 1.9 2003/06/27 15:06:25 dawes Exp $ */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/vmalloc.h> +#include <linux/pagemap.h> +#include <linux/interrupt.h> + +#include <asm/io.h> + +#include "intelfb.h" +#include "intelfbhw.h" + +struct pll_min_max { + int min_m, max_m, min_m1, max_m1; + int min_m2, max_m2, min_n, max_n; + int min_p, max_p, min_p1, max_p1; + int min_vco, max_vco, p_transition_clk, ref_clk; + int p_inc_lo, p_inc_hi; +}; + +#define PLLS_I8xx 0 +#define PLLS_I9xx 1 +#define PLLS_MAX 2 + +static struct pll_min_max plls[PLLS_MAX] = { + { 108, 140, 18, 26, + 6, 16, 3, 16, + 4, 128, 0, 31, + 930000, 1400000, 165000, 48000, + 4, 2 }, /* I8xx */ + + { 75, 120, 10, 20, + 5, 9, 4, 7, + 5, 80, 1, 8, + 1400000, 2800000, 200000, 96000, + 10, 5 } /* I9xx */ +}; + +int intelfbhw_get_chipset(struct pci_dev *pdev, struct intelfb_info *dinfo) +{ + u32 tmp; + if (!pdev || !dinfo) + return 1; + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_830M: + dinfo->name = "Intel(R) 830M"; + dinfo->chipset = INTEL_830M; + dinfo->mobile = 1; + dinfo->pll_index = PLLS_I8xx; + return 0; + case PCI_DEVICE_ID_INTEL_845G: + dinfo->name = "Intel(R) 845G"; + dinfo->chipset = INTEL_845G; + dinfo->mobile = 0; + dinfo->pll_index = PLLS_I8xx; + return 0; + case PCI_DEVICE_ID_INTEL_854: + dinfo->mobile = 1; + dinfo->name = "Intel(R) 854"; + dinfo->chipset = INTEL_854; + return 0; + case PCI_DEVICE_ID_INTEL_85XGM: + tmp = 0; + dinfo->mobile = 1; + dinfo->pll_index = PLLS_I8xx; + pci_read_config_dword(pdev, INTEL_85X_CAPID, &tmp); + switch ((tmp >> INTEL_85X_VARIANT_SHIFT) & + INTEL_85X_VARIANT_MASK) { + case INTEL_VAR_855GME: + dinfo->name = "Intel(R) 855GME"; + dinfo->chipset = INTEL_855GME; + return 0; + case INTEL_VAR_855GM: + dinfo->name = "Intel(R) 855GM"; + dinfo->chipset = INTEL_855GM; + return 0; + case INTEL_VAR_852GME: + dinfo->name = "Intel(R) 852GME"; + dinfo->chipset = INTEL_852GME; + return 0; + case INTEL_VAR_852GM: + dinfo->name = "Intel(R) 852GM"; + dinfo->chipset = INTEL_852GM; + return 0; + default: + dinfo->name = "Intel(R) 852GM/855GM"; + dinfo->chipset = INTEL_85XGM; + return 0; + } + break; + case PCI_DEVICE_ID_INTEL_865G: + dinfo->name = "Intel(R) 865G"; + dinfo->chipset = INTEL_865G; + dinfo->mobile = 0; + dinfo->pll_index = PLLS_I8xx; + return 0; + case PCI_DEVICE_ID_INTEL_915G: + dinfo->name = "Intel(R) 915G"; + dinfo->chipset = INTEL_915G; + dinfo->mobile = 0; + dinfo->pll_index = PLLS_I9xx; + return 0; + case PCI_DEVICE_ID_INTEL_915GM: + dinfo->name = "Intel(R) 915GM"; + dinfo->chipset = INTEL_915GM; + dinfo->mobile = 1; + dinfo->pll_index = PLLS_I9xx; + return 0; + case PCI_DEVICE_ID_INTEL_945G: + dinfo->name = "Intel(R) 945G"; + dinfo->chipset = INTEL_945G; + dinfo->mobile = 0; + dinfo->pll_index = PLLS_I9xx; + return 0; + case PCI_DEVICE_ID_INTEL_945GM: + dinfo->name = "Intel(R) 945GM"; + dinfo->chipset = INTEL_945GM; + dinfo->mobile = 1; + dinfo->pll_index = PLLS_I9xx; + return 0; + case PCI_DEVICE_ID_INTEL_945GME: + dinfo->name = "Intel(R) 945GME"; + dinfo->chipset = INTEL_945GME; + dinfo->mobile = 1; + dinfo->pll_index = PLLS_I9xx; + return 0; + case PCI_DEVICE_ID_INTEL_965G: + dinfo->name = "Intel(R) 965G"; + dinfo->chipset = INTEL_965G; + dinfo->mobile = 0; + dinfo->pll_index = PLLS_I9xx; + return 0; + case PCI_DEVICE_ID_INTEL_965GM: + dinfo->name = "Intel(R) 965GM"; + dinfo->chipset = INTEL_965GM; + dinfo->mobile = 1; + dinfo->pll_index = PLLS_I9xx; + return 0; + default: + return 1; + } +} + +int intelfbhw_get_memory(struct pci_dev *pdev, int *aperture_size, + int *stolen_size) +{ + struct pci_dev *bridge_dev; + u16 tmp; + int stolen_overhead; + + if (!pdev || !aperture_size || !stolen_size) + return 1; + + /* Find the bridge device. It is always 0:0.0 */ + bridge_dev = pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus), 0, + PCI_DEVFN(0, 0)); + if (!bridge_dev) { + ERR_MSG("cannot find bridge device\n"); + return 1; + } + + /* Get the fb aperture size and "stolen" memory amount. */ + tmp = 0; + pci_read_config_word(bridge_dev, INTEL_GMCH_CTRL, &tmp); + pci_dev_put(bridge_dev); + + switch (pdev->device) { + case PCI_DEVICE_ID_INTEL_915G: + case PCI_DEVICE_ID_INTEL_915GM: + case PCI_DEVICE_ID_INTEL_945G: + case PCI_DEVICE_ID_INTEL_945GM: + case PCI_DEVICE_ID_INTEL_945GME: + case PCI_DEVICE_ID_INTEL_965G: + case PCI_DEVICE_ID_INTEL_965GM: + /* + * 915, 945 and 965 chipsets support 64MB, 128MB or 256MB + * aperture. Determine size from PCI resource length. + */ + *aperture_size = pci_resource_len(pdev, 2); + break; + default: + if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M) + *aperture_size = MB(64); + else + *aperture_size = MB(128); + break; + } + + /* Stolen memory size is reduced by the GTT and the popup. + GTT is 1K per MB of aperture size, and popup is 4K. */ + stolen_overhead = (*aperture_size / MB(1)) + 4; + switch(pdev->device) { + case PCI_DEVICE_ID_INTEL_830M: + case PCI_DEVICE_ID_INTEL_845G: + switch (tmp & INTEL_830_GMCH_GMS_MASK) { + case INTEL_830_GMCH_GMS_STOLEN_512: + *stolen_size = KB(512) - KB(stolen_overhead); + return 0; + case INTEL_830_GMCH_GMS_STOLEN_1024: + *stolen_size = MB(1) - KB(stolen_overhead); + return 0; + case INTEL_830_GMCH_GMS_STOLEN_8192: + *stolen_size = MB(8) - KB(stolen_overhead); + return 0; + case INTEL_830_GMCH_GMS_LOCAL: + ERR_MSG("only local memory found\n"); + return 1; + case INTEL_830_GMCH_GMS_DISABLED: + ERR_MSG("video memory is disabled\n"); + return 1; + default: + ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n", + tmp & INTEL_830_GMCH_GMS_MASK); + return 1; + } + break; + default: + switch (tmp & INTEL_855_GMCH_GMS_MASK) { + case INTEL_855_GMCH_GMS_STOLEN_1M: + *stolen_size = MB(1) - KB(stolen_overhead); + return 0; + case INTEL_855_GMCH_GMS_STOLEN_4M: + *stolen_size = MB(4) - KB(stolen_overhead); + return 0; + case INTEL_855_GMCH_GMS_STOLEN_8M: + *stolen_size = MB(8) - KB(stolen_overhead); + return 0; + case INTEL_855_GMCH_GMS_STOLEN_16M: + *stolen_size = MB(16) - KB(stolen_overhead); + return 0; + case INTEL_855_GMCH_GMS_STOLEN_32M: + *stolen_size = MB(32) - KB(stolen_overhead); + return 0; + case INTEL_915G_GMCH_GMS_STOLEN_48M: + *stolen_size = MB(48) - KB(stolen_overhead); + return 0; + case INTEL_915G_GMCH_GMS_STOLEN_64M: + *stolen_size = MB(64) - KB(stolen_overhead); + return 0; + case INTEL_855_GMCH_GMS_DISABLED: + ERR_MSG("video memory is disabled\n"); + return 0; + default: + ERR_MSG("unexpected GMCH_GMS value: 0x%02x\n", + tmp & INTEL_855_GMCH_GMS_MASK); + return 1; + } + } +} + +int intelfbhw_check_non_crt(struct intelfb_info *dinfo) +{ + int dvo = 0; + + if (INREG(LVDS) & PORT_ENABLE) + dvo |= LVDS_PORT; + if (INREG(DVOA) & PORT_ENABLE) + dvo |= DVOA_PORT; + if (INREG(DVOB) & PORT_ENABLE) + dvo |= DVOB_PORT; + if (INREG(DVOC) & PORT_ENABLE) + dvo |= DVOC_PORT; + + return dvo; +} + +const char * intelfbhw_dvo_to_string(int dvo) +{ + if (dvo & DVOA_PORT) + return "DVO port A"; + else if (dvo & DVOB_PORT) + return "DVO port B"; + else if (dvo & DVOC_PORT) + return "DVO port C"; + else if (dvo & LVDS_PORT) + return "LVDS port"; + else + return NULL; +} + + +int intelfbhw_validate_mode(struct intelfb_info *dinfo, + struct fb_var_screeninfo *var) +{ + int bytes_per_pixel; + int tmp; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_validate_mode\n"); +#endif + + bytes_per_pixel = var->bits_per_pixel / 8; + if (bytes_per_pixel == 3) + bytes_per_pixel = 4; + + /* Check if enough video memory. */ + tmp = var->yres_virtual * var->xres_virtual * bytes_per_pixel; + if (tmp > dinfo->fb.size) { + WRN_MSG("Not enough video ram for mode " + "(%d KByte vs %d KByte).\n", + BtoKB(tmp), BtoKB(dinfo->fb.size)); + return 1; + } + + /* Check if x/y limits are OK. */ + if (var->xres - 1 > HACTIVE_MASK) { + WRN_MSG("X resolution too large (%d vs %d).\n", + var->xres, HACTIVE_MASK + 1); + return 1; + } + if (var->yres - 1 > VACTIVE_MASK) { + WRN_MSG("Y resolution too large (%d vs %d).\n", + var->yres, VACTIVE_MASK + 1); + return 1; + } + if (var->xres < 4) { + WRN_MSG("X resolution too small (%d vs 4).\n", var->xres); + return 1; + } + if (var->yres < 4) { + WRN_MSG("Y resolution too small (%d vs 4).\n", var->yres); + return 1; + } + + /* Check for doublescan modes. */ + if (var->vmode & FB_VMODE_DOUBLE) { + WRN_MSG("Mode is double-scan.\n"); + return 1; + } + + if ((var->vmode & FB_VMODE_INTERLACED) && (var->yres & 1)) { + WRN_MSG("Odd number of lines in interlaced mode\n"); + return 1; + } + + /* Check if clock is OK. */ + tmp = 1000000000 / var->pixclock; + if (tmp < MIN_CLOCK) { + WRN_MSG("Pixel clock is too low (%d MHz vs %d MHz).\n", + (tmp + 500) / 1000, MIN_CLOCK / 1000); + return 1; + } + if (tmp > MAX_CLOCK) { + WRN_MSG("Pixel clock is too high (%d MHz vs %d MHz).\n", + (tmp + 500) / 1000, MAX_CLOCK / 1000); + return 1; + } + + return 0; +} + +int intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) +{ + struct intelfb_info *dinfo = GET_DINFO(info); + u32 offset, xoffset, yoffset; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_pan_display\n"); +#endif + + xoffset = ROUND_DOWN_TO(var->xoffset, 8); + yoffset = var->yoffset; + + if ((xoffset + info->var.xres > info->var.xres_virtual) || + (yoffset + info->var.yres > info->var.yres_virtual)) + return -EINVAL; + + offset = (yoffset * dinfo->pitch) + + (xoffset * info->var.bits_per_pixel) / 8; + + offset += dinfo->fb.offset << 12; + + dinfo->vsync.pan_offset = offset; + if ((var->activate & FB_ACTIVATE_VBL) && + !intelfbhw_enable_irq(dinfo)) + dinfo->vsync.pan_display = 1; + else { + dinfo->vsync.pan_display = 0; + OUTREG(DSPABASE, offset); + } + + return 0; +} + +/* Blank the screen. */ +void intelfbhw_do_blank(int blank, struct fb_info *info) +{ + struct intelfb_info *dinfo = GET_DINFO(info); + u32 tmp; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_do_blank: blank is %d\n", blank); +#endif + + /* Turn plane A on or off */ + tmp = INREG(DSPACNTR); + if (blank) + tmp &= ~DISPPLANE_PLANE_ENABLE; + else + tmp |= DISPPLANE_PLANE_ENABLE; + OUTREG(DSPACNTR, tmp); + /* Flush */ + tmp = INREG(DSPABASE); + OUTREG(DSPABASE, tmp); + + /* Turn off/on the HW cursor */ +#if VERBOSE > 0 + DBG_MSG("cursor_on is %d\n", dinfo->cursor_on); +#endif + if (dinfo->cursor_on) { + if (blank) + intelfbhw_cursor_hide(dinfo); + else + intelfbhw_cursor_show(dinfo); + dinfo->cursor_on = 1; + } + dinfo->cursor_blanked = blank; + + /* Set DPMS level */ + tmp = INREG(ADPA) & ~ADPA_DPMS_CONTROL_MASK; + switch (blank) { + case FB_BLANK_UNBLANK: + case FB_BLANK_NORMAL: + tmp |= ADPA_DPMS_D0; + break; + case FB_BLANK_VSYNC_SUSPEND: + tmp |= ADPA_DPMS_D1; + break; + case FB_BLANK_HSYNC_SUSPEND: + tmp |= ADPA_DPMS_D2; + break; + case FB_BLANK_POWERDOWN: + tmp |= ADPA_DPMS_D3; + break; + } + OUTREG(ADPA, tmp); + + return; +} + + +/* Check which pipe is connected to an active display plane. */ +int intelfbhw_active_pipe(const struct intelfb_hwstate *hw) +{ + int pipe = -1; + + /* keep old default behaviour - prefer PIPE_A */ + if (hw->disp_b_ctrl & DISPPLANE_PLANE_ENABLE) { + pipe = (hw->disp_b_ctrl >> DISPPLANE_SEL_PIPE_SHIFT); + pipe &= PIPE_MASK; + if (unlikely(pipe == PIPE_A)) + return PIPE_A; + } + if (hw->disp_a_ctrl & DISPPLANE_PLANE_ENABLE) { + pipe = (hw->disp_a_ctrl >> DISPPLANE_SEL_PIPE_SHIFT); + pipe &= PIPE_MASK; + if (likely(pipe == PIPE_A)) + return PIPE_A; + } + /* Impossible that no pipe is selected - return PIPE_A */ + WARN_ON(pipe == -1); + if (unlikely(pipe == -1)) + pipe = PIPE_A; + + return pipe; +} + +void intelfbhw_setcolreg(struct intelfb_info *dinfo, unsigned regno, + unsigned red, unsigned green, unsigned blue, + unsigned transp) +{ + u32 palette_reg = (dinfo->pipe == PIPE_A) ? + PALETTE_A : PALETTE_B; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_setcolreg: %d: (%d, %d, %d)\n", + regno, red, green, blue); +#endif + + OUTREG(palette_reg + (regno << 2), + (red << PALETTE_8_RED_SHIFT) | + (green << PALETTE_8_GREEN_SHIFT) | + (blue << PALETTE_8_BLUE_SHIFT)); +} + + +int intelfbhw_read_hw_state(struct intelfb_info *dinfo, + struct intelfb_hwstate *hw, int flag) +{ + int i; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_read_hw_state\n"); +#endif + + if (!hw || !dinfo) + return -1; + + /* Read in as much of the HW state as possible. */ + hw->vga0_divisor = INREG(VGA0_DIVISOR); + hw->vga1_divisor = INREG(VGA1_DIVISOR); + hw->vga_pd = INREG(VGAPD); + hw->dpll_a = INREG(DPLL_A); + hw->dpll_b = INREG(DPLL_B); + hw->fpa0 = INREG(FPA0); + hw->fpa1 = INREG(FPA1); + hw->fpb0 = INREG(FPB0); + hw->fpb1 = INREG(FPB1); + + if (flag == 1) + return flag; + +#if 0 + /* This seems to be a problem with the 852GM/855GM */ + for (i = 0; i < PALETTE_8_ENTRIES; i++) { + hw->palette_a[i] = INREG(PALETTE_A + (i << 2)); + hw->palette_b[i] = INREG(PALETTE_B + (i << 2)); + } +#endif + + if (flag == 2) + return flag; + + hw->htotal_a = INREG(HTOTAL_A); + hw->hblank_a = INREG(HBLANK_A); + hw->hsync_a = INREG(HSYNC_A); + hw->vtotal_a = INREG(VTOTAL_A); + hw->vblank_a = INREG(VBLANK_A); + hw->vsync_a = INREG(VSYNC_A); + hw->src_size_a = INREG(SRC_SIZE_A); + hw->bclrpat_a = INREG(BCLRPAT_A); + hw->htotal_b = INREG(HTOTAL_B); + hw->hblank_b = INREG(HBLANK_B); + hw->hsync_b = INREG(HSYNC_B); + hw->vtotal_b = INREG(VTOTAL_B); + hw->vblank_b = INREG(VBLANK_B); + hw->vsync_b = INREG(VSYNC_B); + hw->src_size_b = INREG(SRC_SIZE_B); + hw->bclrpat_b = INREG(BCLRPAT_B); + + if (flag == 3) + return flag; + + hw->adpa = INREG(ADPA); + hw->dvoa = INREG(DVOA); + hw->dvob = INREG(DVOB); + hw->dvoc = INREG(DVOC); + hw->dvoa_srcdim = INREG(DVOA_SRCDIM); + hw->dvob_srcdim = INREG(DVOB_SRCDIM); + hw->dvoc_srcdim = INREG(DVOC_SRCDIM); + hw->lvds = INREG(LVDS); + + if (flag == 4) + return flag; + + hw->pipe_a_conf = INREG(PIPEACONF); + hw->pipe_b_conf = INREG(PIPEBCONF); + hw->disp_arb = INREG(DISPARB); + + if (flag == 5) + return flag; + + hw->cursor_a_control = INREG(CURSOR_A_CONTROL); + hw->cursor_b_control = INREG(CURSOR_B_CONTROL); + hw->cursor_a_base = INREG(CURSOR_A_BASEADDR); + hw->cursor_b_base = INREG(CURSOR_B_BASEADDR); + + if (flag == 6) + return flag; + + for (i = 0; i < 4; i++) { + hw->cursor_a_palette[i] = INREG(CURSOR_A_PALETTE0 + (i << 2)); + hw->cursor_b_palette[i] = INREG(CURSOR_B_PALETTE0 + (i << 2)); + } + + if (flag == 7) + return flag; + + hw->cursor_size = INREG(CURSOR_SIZE); + + if (flag == 8) + return flag; + + hw->disp_a_ctrl = INREG(DSPACNTR); + hw->disp_b_ctrl = INREG(DSPBCNTR); + hw->disp_a_base = INREG(DSPABASE); + hw->disp_b_base = INREG(DSPBBASE); + hw->disp_a_stride = INREG(DSPASTRIDE); + hw->disp_b_stride = INREG(DSPBSTRIDE); + + if (flag == 9) + return flag; + + hw->vgacntrl = INREG(VGACNTRL); + + if (flag == 10) + return flag; + + hw->add_id = INREG(ADD_ID); + + if (flag == 11) + return flag; + + for (i = 0; i < 7; i++) { + hw->swf0x[i] = INREG(SWF00 + (i << 2)); + hw->swf1x[i] = INREG(SWF10 + (i << 2)); + if (i < 3) + hw->swf3x[i] = INREG(SWF30 + (i << 2)); + } + + for (i = 0; i < 8; i++) + hw->fence[i] = INREG(FENCE + (i << 2)); + + hw->instpm = INREG(INSTPM); + hw->mem_mode = INREG(MEM_MODE); + hw->fw_blc_0 = INREG(FW_BLC_0); + hw->fw_blc_1 = INREG(FW_BLC_1); + + hw->hwstam = INREG16(HWSTAM); + hw->ier = INREG16(IER); + hw->iir = INREG16(IIR); + hw->imr = INREG16(IMR); + + return 0; +} + + +static int calc_vclock3(int index, int m, int n, int p) +{ + if (p == 0 || n == 0) + return 0; + return plls[index].ref_clk * m / n / p; +} + +static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2, + int lvds) +{ + struct pll_min_max *pll = &plls[index]; + u32 m, vco, p; + + m = (5 * (m1 + 2)) + (m2 + 2); + n += 2; + vco = pll->ref_clk * m / n; + + if (index == PLLS_I8xx) + p = ((p1 + 2) * (1 << (p2 + 1))); + else + p = ((p1) * (p2 ? 5 : 10)); + return vco / p; +} + +#if REGDUMP +static void intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll, + int *o_p1, int *o_p2) +{ + int p1, p2; + + if (IS_I9XX(dinfo)) { + if (dpll & DPLL_P1_FORCE_DIV2) + p1 = 1; + else + p1 = (dpll >> DPLL_P1_SHIFT) & 0xff; + + p1 = ffs(p1); + + p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK; + } else { + if (dpll & DPLL_P1_FORCE_DIV2) + p1 = 0; + else + p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK; + p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK; + } + + *o_p1 = p1; + *o_p2 = p2; +} +#endif + + +void intelfbhw_print_hw_state(struct intelfb_info *dinfo, + struct intelfb_hwstate *hw) +{ +#if REGDUMP + int i, m1, m2, n, p1, p2; + int index = dinfo->pll_index; + DBG_MSG("intelfbhw_print_hw_state\n"); + + if (!hw) + return; + /* Read in as much of the HW state as possible. */ + printk("hw state dump start\n"); + printk(" VGA0_DIVISOR: 0x%08x\n", hw->vga0_divisor); + printk(" VGA1_DIVISOR: 0x%08x\n", hw->vga1_divisor); + printk(" VGAPD: 0x%08x\n", hw->vga_pd); + n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + + intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2); + + printk(" VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", + m1, m2, n, p1, p2); + printk(" VGA0: clock is %d\n", + calc_vclock(index, m1, m2, n, p1, p2, 0)); + + n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + + intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2); + printk(" VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", + m1, m2, n, p1, p2); + printk(" VGA1: clock is %d\n", + calc_vclock(index, m1, m2, n, p1, p2, 0)); + + printk(" DPLL_A: 0x%08x\n", hw->dpll_a); + printk(" DPLL_B: 0x%08x\n", hw->dpll_b); + printk(" FPA0: 0x%08x\n", hw->fpa0); + printk(" FPA1: 0x%08x\n", hw->fpa1); + printk(" FPB0: 0x%08x\n", hw->fpb0); + printk(" FPB1: 0x%08x\n", hw->fpb1); + + n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + + intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2); + + printk(" PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", + m1, m2, n, p1, p2); + printk(" PLLA0: clock is %d\n", + calc_vclock(index, m1, m2, n, p1, p2, 0)); + + n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; + + intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2); + + printk(" PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", + m1, m2, n, p1, p2); + printk(" PLLA1: clock is %d\n", + calc_vclock(index, m1, m2, n, p1, p2, 0)); + +#if 0 + printk(" PALETTE_A:\n"); + for (i = 0; i < PALETTE_8_ENTRIES) + printk(" %3d: 0x%08x\n", i, hw->palette_a[i]); + printk(" PALETTE_B:\n"); + for (i = 0; i < PALETTE_8_ENTRIES) + printk(" %3d: 0x%08x\n", i, hw->palette_b[i]); +#endif + + printk(" HTOTAL_A: 0x%08x\n", hw->htotal_a); + printk(" HBLANK_A: 0x%08x\n", hw->hblank_a); + printk(" HSYNC_A: 0x%08x\n", hw->hsync_a); + printk(" VTOTAL_A: 0x%08x\n", hw->vtotal_a); + printk(" VBLANK_A: 0x%08x\n", hw->vblank_a); + printk(" VSYNC_A: 0x%08x\n", hw->vsync_a); + printk(" SRC_SIZE_A: 0x%08x\n", hw->src_size_a); + printk(" BCLRPAT_A: 0x%08x\n", hw->bclrpat_a); + printk(" HTOTAL_B: 0x%08x\n", hw->htotal_b); + printk(" HBLANK_B: 0x%08x\n", hw->hblank_b); + printk(" HSYNC_B: 0x%08x\n", hw->hsync_b); + printk(" VTOTAL_B: 0x%08x\n", hw->vtotal_b); + printk(" VBLANK_B: 0x%08x\n", hw->vblank_b); + printk(" VSYNC_B: 0x%08x\n", hw->vsync_b); + printk(" SRC_SIZE_B: 0x%08x\n", hw->src_size_b); + printk(" BCLRPAT_B: 0x%08x\n", hw->bclrpat_b); + + printk(" ADPA: 0x%08x\n", hw->adpa); + printk(" DVOA: 0x%08x\n", hw->dvoa); + printk(" DVOB: 0x%08x\n", hw->dvob); + printk(" DVOC: 0x%08x\n", hw->dvoc); + printk(" DVOA_SRCDIM: 0x%08x\n", hw->dvoa_srcdim); + printk(" DVOB_SRCDIM: 0x%08x\n", hw->dvob_srcdim); + printk(" DVOC_SRCDIM: 0x%08x\n", hw->dvoc_srcdim); + printk(" LVDS: 0x%08x\n", hw->lvds); + + printk(" PIPEACONF: 0x%08x\n", hw->pipe_a_conf); + printk(" PIPEBCONF: 0x%08x\n", hw->pipe_b_conf); + printk(" DISPARB: 0x%08x\n", hw->disp_arb); + + printk(" CURSOR_A_CONTROL: 0x%08x\n", hw->cursor_a_control); + printk(" CURSOR_B_CONTROL: 0x%08x\n", hw->cursor_b_control); + printk(" CURSOR_A_BASEADDR: 0x%08x\n", hw->cursor_a_base); + printk(" CURSOR_B_BASEADDR: 0x%08x\n", hw->cursor_b_base); + + printk(" CURSOR_A_PALETTE: "); + for (i = 0; i < 4; i++) { + printk("0x%08x", hw->cursor_a_palette[i]); + if (i < 3) + printk(", "); + } + printk("\n"); + printk(" CURSOR_B_PALETTE: "); + for (i = 0; i < 4; i++) { + printk("0x%08x", hw->cursor_b_palette[i]); + if (i < 3) + printk(", "); + } + printk("\n"); + + printk(" CURSOR_SIZE: 0x%08x\n", hw->cursor_size); + + printk(" DSPACNTR: 0x%08x\n", hw->disp_a_ctrl); + printk(" DSPBCNTR: 0x%08x\n", hw->disp_b_ctrl); + printk(" DSPABASE: 0x%08x\n", hw->disp_a_base); + printk(" DSPBBASE: 0x%08x\n", hw->disp_b_base); + printk(" DSPASTRIDE: 0x%08x\n", hw->disp_a_stride); + printk(" DSPBSTRIDE: 0x%08x\n", hw->disp_b_stride); + + printk(" VGACNTRL: 0x%08x\n", hw->vgacntrl); + printk(" ADD_ID: 0x%08x\n", hw->add_id); + + for (i = 0; i < 7; i++) { + printk(" SWF0%d 0x%08x\n", i, + hw->swf0x[i]); + } + for (i = 0; i < 7; i++) { + printk(" SWF1%d 0x%08x\n", i, + hw->swf1x[i]); + } + for (i = 0; i < 3; i++) { + printk(" SWF3%d 0x%08x\n", i, + hw->swf3x[i]); + } + for (i = 0; i < 8; i++) + printk(" FENCE%d 0x%08x\n", i, + hw->fence[i]); + + printk(" INSTPM 0x%08x\n", hw->instpm); + printk(" MEM_MODE 0x%08x\n", hw->mem_mode); + printk(" FW_BLC_0 0x%08x\n", hw->fw_blc_0); + printk(" FW_BLC_1 0x%08x\n", hw->fw_blc_1); + + printk(" HWSTAM 0x%04x\n", hw->hwstam); + printk(" IER 0x%04x\n", hw->ier); + printk(" IIR 0x%04x\n", hw->iir); + printk(" IMR 0x%04x\n", hw->imr); + printk("hw state dump end\n"); +#endif +} + + + +/* Split the M parameter into M1 and M2. */ +static int splitm(int index, unsigned int m, unsigned int *retm1, + unsigned int *retm2) +{ + int m1, m2; + int testm; + struct pll_min_max *pll = &plls[index]; + + /* no point optimising too much - brute force m */ + for (m1 = pll->min_m1; m1 < pll->max_m1 + 1; m1++) { + for (m2 = pll->min_m2; m2 < pll->max_m2 + 1; m2++) { + testm = (5 * (m1 + 2)) + (m2 + 2); + if (testm == m) { + *retm1 = (unsigned int)m1; + *retm2 = (unsigned int)m2; + return 0; + } + } + } + return 1; +} + +/* Split the P parameter into P1 and P2. */ +static int splitp(int index, unsigned int p, unsigned int *retp1, + unsigned int *retp2) +{ + int p1, p2; + struct pll_min_max *pll = &plls[index]; + + if (index == PLLS_I9xx) { + p2 = (p % 10) ? 1 : 0; + + p1 = p / (p2 ? 5 : 10); + + *retp1 = (unsigned int)p1; + *retp2 = (unsigned int)p2; + return 0; + } + + if (p % 4 == 0) + p2 = 1; + else + p2 = 0; + p1 = (p / (1 << (p2 + 1))) - 2; + if (p % 4 == 0 && p1 < pll->min_p1) { + p2 = 0; + p1 = (p / (1 << (p2 + 1))) - 2; + } + if (p1 < pll->min_p1 || p1 > pll->max_p1 || + (p1 + 2) * (1 << (p2 + 1)) != p) { + return 1; + } else { + *retp1 = (unsigned int)p1; + *retp2 = (unsigned int)p2; + return 0; + } +} + +static int calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, + u32 *retn, u32 *retp1, u32 *retp2, u32 *retclock) +{ + u32 m1, m2, n, p1, p2, n1, testm; + u32 f_vco, p, p_best = 0, m, f_out = 0; + u32 err_best = 10000000; + u32 n_best = 0, m_best = 0, f_err; + u32 p_min, p_max, p_inc, div_max; + struct pll_min_max *pll = &plls[index]; + + DBG_MSG("Clock is %d\n", clock); + + div_max = pll->max_vco / clock; + + p_inc = (clock <= pll->p_transition_clk) ? pll->p_inc_lo : pll->p_inc_hi; + p_min = p_inc; + p_max = ROUND_DOWN_TO(div_max, p_inc); + if (p_min < pll->min_p) + p_min = pll->min_p; + if (p_max > pll->max_p) + p_max = pll->max_p; + + DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc); + + p = p_min; + do { + if (splitp(index, p, &p1, &p2)) { + WRN_MSG("cannot split p = %d\n", p); + p += p_inc; + continue; + } + n = pll->min_n; + f_vco = clock * p; + + do { + m = ROUND_UP_TO(f_vco * n, pll->ref_clk) / pll->ref_clk; + if (m < pll->min_m) + m = pll->min_m + 1; + if (m > pll->max_m) + m = pll->max_m - 1; + for (testm = m - 1; testm <= m; testm++) { + f_out = calc_vclock3(index, testm, n, p); + if (splitm(index, testm, &m1, &m2)) { + WRN_MSG("cannot split m = %d\n", + testm); + continue; + } + if (clock > f_out) + f_err = clock - f_out; + else/* slightly bias the error for bigger clocks */ + f_err = f_out - clock + 1; + + if (f_err < err_best) { + m_best = testm; + n_best = n; + p_best = p; + err_best = f_err; + } + } + n++; + } while ((n <= pll->max_n) && (f_out >= clock)); + p += p_inc; + } while ((p <= p_max)); + + if (!m_best) { + WRN_MSG("cannot find parameters for clock %d\n", clock); + return 1; + } + m = m_best; + n = n_best; + p = p_best; + splitm(index, m, &m1, &m2); + splitp(index, p, &p1, &p2); + n1 = n - 2; + + DBG_MSG("m, n, p: %d (%d,%d), %d (%d), %d (%d,%d), " + "f: %d (%d), VCO: %d\n", + m, m1, m2, n, n1, p, p1, p2, + calc_vclock3(index, m, n, p), + calc_vclock(index, m1, m2, n1, p1, p2, 0), + calc_vclock3(index, m, n, p) * p); + *retm1 = m1; + *retm2 = m2; + *retn = n1; + *retp1 = p1; + *retp2 = p2; + *retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0); + + return 0; +} + +static __inline__ int check_overflow(u32 value, u32 limit, + const char *description) +{ + if (value > limit) { + WRN_MSG("%s value %d exceeds limit %d\n", + description, value, limit); + return 1; + } + return 0; +} + +/* It is assumed that hw is filled in with the initial state information. */ +int intelfbhw_mode_to_hw(struct intelfb_info *dinfo, + struct intelfb_hwstate *hw, + struct fb_var_screeninfo *var) +{ + int pipe = intelfbhw_active_pipe(hw); + u32 *dpll, *fp0, *fp1; + u32 m1, m2, n, p1, p2, clock_target, clock; + u32 hsync_start, hsync_end, hblank_start, hblank_end, htotal, hactive; + u32 vsync_start, vsync_end, vblank_start, vblank_end, vtotal, vactive; + u32 vsync_pol, hsync_pol; + u32 *vs, *vb, *vt, *hs, *hb, *ht, *ss, *pipe_conf; + u32 stride_alignment; + + DBG_MSG("intelfbhw_mode_to_hw\n"); + + /* Disable VGA */ + hw->vgacntrl |= VGA_DISABLE; + + /* Set which pipe's registers will be set. */ + if (pipe == PIPE_B) { + dpll = &hw->dpll_b; + fp0 = &hw->fpb0; + fp1 = &hw->fpb1; + hs = &hw->hsync_b; + hb = &hw->hblank_b; + ht = &hw->htotal_b; + vs = &hw->vsync_b; + vb = &hw->vblank_b; + vt = &hw->vtotal_b; + ss = &hw->src_size_b; + pipe_conf = &hw->pipe_b_conf; + } else { + dpll = &hw->dpll_a; + fp0 = &hw->fpa0; + fp1 = &hw->fpa1; + hs = &hw->hsync_a; + hb = &hw->hblank_a; + ht = &hw->htotal_a; + vs = &hw->vsync_a; + vb = &hw->vblank_a; + vt = &hw->vtotal_a; + ss = &hw->src_size_a; + pipe_conf = &hw->pipe_a_conf; + } + + /* Use ADPA register for sync control. */ + hw->adpa &= ~ADPA_USE_VGA_HVPOLARITY; + + /* sync polarity */ + hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ? + ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW; + vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ? + ADPA_SYNC_ACTIVE_HIGH : ADPA_SYNC_ACTIVE_LOW; + hw->adpa &= ~((ADPA_SYNC_ACTIVE_MASK << ADPA_VSYNC_ACTIVE_SHIFT) | + (ADPA_SYNC_ACTIVE_MASK << ADPA_HSYNC_ACTIVE_SHIFT)); + hw->adpa |= (hsync_pol << ADPA_HSYNC_ACTIVE_SHIFT) | + (vsync_pol << ADPA_VSYNC_ACTIVE_SHIFT); + + /* Connect correct pipe to the analog port DAC */ + hw->adpa &= ~(PIPE_MASK << ADPA_PIPE_SELECT_SHIFT); + hw->adpa |= (pipe << ADPA_PIPE_SELECT_SHIFT); + + /* Set DPMS state to D0 (on) */ + hw->adpa &= ~ADPA_DPMS_CONTROL_MASK; + hw->adpa |= ADPA_DPMS_D0; + + hw->adpa |= ADPA_DAC_ENABLE; + + *dpll |= (DPLL_VCO_ENABLE | DPLL_VGA_MODE_DISABLE); + *dpll &= ~(DPLL_RATE_SELECT_MASK | DPLL_REFERENCE_SELECT_MASK); + *dpll |= (DPLL_REFERENCE_DEFAULT | DPLL_RATE_SELECT_FP0); + + /* Desired clock in kHz */ + clock_target = 1000000000 / var->pixclock; + + if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2, + &n, &p1, &p2, &clock)) { + WRN_MSG("calc_pll_params failed\n"); + return 1; + } + + /* Check for overflow. */ + if (check_overflow(p1, DPLL_P1_MASK, "PLL P1 parameter")) + return 1; + if (check_overflow(p2, DPLL_P2_MASK, "PLL P2 parameter")) + return 1; + if (check_overflow(m1, FP_DIVISOR_MASK, "PLL M1 parameter")) + return 1; + if (check_overflow(m2, FP_DIVISOR_MASK, "PLL M2 parameter")) + return 1; + if (check_overflow(n, FP_DIVISOR_MASK, "PLL N parameter")) + return 1; + + *dpll &= ~DPLL_P1_FORCE_DIV2; + *dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) | + (DPLL_P1_MASK << DPLL_P1_SHIFT)); + + if (IS_I9XX(dinfo)) { + *dpll |= (p2 << DPLL_I9XX_P2_SHIFT); + *dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT; + } else + *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT); + + *fp0 = (n << FP_N_DIVISOR_SHIFT) | + (m1 << FP_M1_DIVISOR_SHIFT) | + (m2 << FP_M2_DIVISOR_SHIFT); + *fp1 = *fp0; + + hw->dvob &= ~PORT_ENABLE; + hw->dvoc &= ~PORT_ENABLE; + + /* Use display plane A. */ + hw->disp_a_ctrl |= DISPPLANE_PLANE_ENABLE; + hw->disp_a_ctrl &= ~DISPPLANE_GAMMA_ENABLE; + hw->disp_a_ctrl &= ~DISPPLANE_PIXFORMAT_MASK; + switch (intelfb_var_to_depth(var)) { + case 8: + hw->disp_a_ctrl |= DISPPLANE_8BPP | DISPPLANE_GAMMA_ENABLE; + break; + case 15: + hw->disp_a_ctrl |= DISPPLANE_15_16BPP; + break; + case 16: + hw->disp_a_ctrl |= DISPPLANE_16BPP; + break; + case 24: + hw->disp_a_ctrl |= DISPPLANE_32BPP_NO_ALPHA; + break; + } + hw->disp_a_ctrl &= ~(PIPE_MASK << DISPPLANE_SEL_PIPE_SHIFT); + hw->disp_a_ctrl |= (pipe << DISPPLANE_SEL_PIPE_SHIFT); + + /* Set CRTC registers. */ + hactive = var->xres; + hsync_start = hactive + var->right_margin; + hsync_end = hsync_start + var->hsync_len; + htotal = hsync_end + var->left_margin; + hblank_start = hactive; + hblank_end = htotal; + + DBG_MSG("H: act %d, ss %d, se %d, tot %d bs %d, be %d\n", + hactive, hsync_start, hsync_end, htotal, hblank_start, + hblank_end); + + vactive = var->yres; + if (var->vmode & FB_VMODE_INTERLACED) + vactive--; /* the chip adds 2 halflines automatically */ + vsync_start = vactive + var->lower_margin; + vsync_end = vsync_start + var->vsync_len; + vtotal = vsync_end + var->upper_margin; + vblank_start = vactive; + vblank_end = vsync_end + 1; + + DBG_MSG("V: act %d, ss %d, se %d, tot %d bs %d, be %d\n", + vactive, vsync_start, vsync_end, vtotal, vblank_start, + vblank_end); + + /* Adjust for register values, and check for overflow. */ + hactive--; + if (check_overflow(hactive, HACTIVE_MASK, "CRTC hactive")) + return 1; + hsync_start--; + if (check_overflow(hsync_start, HSYNCSTART_MASK, "CRTC hsync_start")) + return 1; + hsync_end--; + if (check_overflow(hsync_end, HSYNCEND_MASK, "CRTC hsync_end")) + return 1; + htotal--; + if (check_overflow(htotal, HTOTAL_MASK, "CRTC htotal")) + return 1; + hblank_start--; + if (check_overflow(hblank_start, HBLANKSTART_MASK, "CRTC hblank_start")) + return 1; + hblank_end--; + if (check_overflow(hblank_end, HBLANKEND_MASK, "CRTC hblank_end")) + return 1; + + vactive--; + if (check_overflow(vactive, VACTIVE_MASK, "CRTC vactive")) + return 1; + vsync_start--; + if (check_overflow(vsync_start, VSYNCSTART_MASK, "CRTC vsync_start")) + return 1; + vsync_end--; + if (check_overflow(vsync_end, VSYNCEND_MASK, "CRTC vsync_end")) + return 1; + vtotal--; + if (check_overflow(vtotal, VTOTAL_MASK, "CRTC vtotal")) + return 1; + vblank_start--; + if (check_overflow(vblank_start, VBLANKSTART_MASK, "CRTC vblank_start")) + return 1; + vblank_end--; + if (check_overflow(vblank_end, VBLANKEND_MASK, "CRTC vblank_end")) + return 1; + + *ht = (htotal << HTOTAL_SHIFT) | (hactive << HACTIVE_SHIFT); + *hb = (hblank_start << HBLANKSTART_SHIFT) | + (hblank_end << HSYNCEND_SHIFT); + *hs = (hsync_start << HSYNCSTART_SHIFT) | (hsync_end << HSYNCEND_SHIFT); + + *vt = (vtotal << VTOTAL_SHIFT) | (vactive << VACTIVE_SHIFT); + *vb = (vblank_start << VBLANKSTART_SHIFT) | + (vblank_end << VSYNCEND_SHIFT); + *vs = (vsync_start << VSYNCSTART_SHIFT) | (vsync_end << VSYNCEND_SHIFT); + *ss = (hactive << SRC_SIZE_HORIZ_SHIFT) | + (vactive << SRC_SIZE_VERT_SHIFT); + + hw->disp_a_stride = dinfo->pitch; + DBG_MSG("pitch is %d\n", hw->disp_a_stride); + + hw->disp_a_base = hw->disp_a_stride * var->yoffset + + var->xoffset * var->bits_per_pixel / 8; + + hw->disp_a_base += dinfo->fb.offset << 12; + + /* Check stride alignment. */ + stride_alignment = IS_I9XX(dinfo) ? STRIDE_ALIGNMENT_I9XX : + STRIDE_ALIGNMENT; + if (hw->disp_a_stride % stride_alignment != 0) { + WRN_MSG("display stride %d has bad alignment %d\n", + hw->disp_a_stride, stride_alignment); + return 1; + } + + /* Set the palette to 8-bit mode. */ + *pipe_conf &= ~PIPECONF_GAMMA; + + if (var->vmode & FB_VMODE_INTERLACED) + *pipe_conf |= PIPECONF_INTERLACE_W_FIELD_INDICATION; + else + *pipe_conf &= ~PIPECONF_INTERLACE_MASK; + + return 0; +} + +/* Program a (non-VGA) video mode. */ +int intelfbhw_program_mode(struct intelfb_info *dinfo, + const struct intelfb_hwstate *hw, int blank) +{ + u32 tmp; + const u32 *dpll, *fp0, *fp1, *pipe_conf; + const u32 *hs, *ht, *hb, *vs, *vt, *vb, *ss; + u32 dpll_reg, fp0_reg, fp1_reg, pipe_conf_reg, pipe_stat_reg; + u32 hsync_reg, htotal_reg, hblank_reg; + u32 vsync_reg, vtotal_reg, vblank_reg; + u32 src_size_reg; + u32 count, tmp_val[3]; + + /* Assume single pipe */ + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_program_mode\n"); +#endif + + /* Disable VGA */ + tmp = INREG(VGACNTRL); + tmp |= VGA_DISABLE; + OUTREG(VGACNTRL, tmp); + + dinfo->pipe = intelfbhw_active_pipe(hw); + + if (dinfo->pipe == PIPE_B) { + dpll = &hw->dpll_b; + fp0 = &hw->fpb0; + fp1 = &hw->fpb1; + pipe_conf = &hw->pipe_b_conf; + hs = &hw->hsync_b; + hb = &hw->hblank_b; + ht = &hw->htotal_b; + vs = &hw->vsync_b; + vb = &hw->vblank_b; + vt = &hw->vtotal_b; + ss = &hw->src_size_b; + dpll_reg = DPLL_B; + fp0_reg = FPB0; + fp1_reg = FPB1; + pipe_conf_reg = PIPEBCONF; + pipe_stat_reg = PIPEBSTAT; + hsync_reg = HSYNC_B; + htotal_reg = HTOTAL_B; + hblank_reg = HBLANK_B; + vsync_reg = VSYNC_B; + vtotal_reg = VTOTAL_B; + vblank_reg = VBLANK_B; + src_size_reg = SRC_SIZE_B; + } else { + dpll = &hw->dpll_a; + fp0 = &hw->fpa0; + fp1 = &hw->fpa1; + pipe_conf = &hw->pipe_a_conf; + hs = &hw->hsync_a; + hb = &hw->hblank_a; + ht = &hw->htotal_a; + vs = &hw->vsync_a; + vb = &hw->vblank_a; + vt = &hw->vtotal_a; + ss = &hw->src_size_a; + dpll_reg = DPLL_A; + fp0_reg = FPA0; + fp1_reg = FPA1; + pipe_conf_reg = PIPEACONF; + pipe_stat_reg = PIPEASTAT; + hsync_reg = HSYNC_A; + htotal_reg = HTOTAL_A; + hblank_reg = HBLANK_A; + vsync_reg = VSYNC_A; + vtotal_reg = VTOTAL_A; + vblank_reg = VBLANK_A; + src_size_reg = SRC_SIZE_A; + } + + /* turn off pipe */ + tmp = INREG(pipe_conf_reg); + tmp &= ~PIPECONF_ENABLE; + OUTREG(pipe_conf_reg, tmp); + + count = 0; + do { + tmp_val[count % 3] = INREG(PIPEA_DSL); + if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1] == tmp_val[2])) + break; + count++; + udelay(1); + if (count % 200 == 0) { + tmp = INREG(pipe_conf_reg); + tmp &= ~PIPECONF_ENABLE; + OUTREG(pipe_conf_reg, tmp); + } + } while (count < 2000); + + OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE); + + /* Disable planes A and B. */ + tmp = INREG(DSPACNTR); + tmp &= ~DISPPLANE_PLANE_ENABLE; + OUTREG(DSPACNTR, tmp); + tmp = INREG(DSPBCNTR); + tmp &= ~DISPPLANE_PLANE_ENABLE; + OUTREG(DSPBCNTR, tmp); + + /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */ + mdelay(20); + + OUTREG(DVOB, INREG(DVOB) & ~PORT_ENABLE); + OUTREG(DVOC, INREG(DVOC) & ~PORT_ENABLE); + OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE); + + /* Disable Sync */ + tmp = INREG(ADPA); + tmp &= ~ADPA_DPMS_CONTROL_MASK; + tmp |= ADPA_DPMS_D3; + OUTREG(ADPA, tmp); + + /* do some funky magic - xyzzy */ + OUTREG(0x61204, 0xabcd0000); + + /* turn off PLL */ + tmp = INREG(dpll_reg); + tmp &= ~DPLL_VCO_ENABLE; + OUTREG(dpll_reg, tmp); + + /* Set PLL parameters */ + OUTREG(fp0_reg, *fp0); + OUTREG(fp1_reg, *fp1); + + /* Enable PLL */ + OUTREG(dpll_reg, *dpll); + + /* Set DVOs B/C */ + OUTREG(DVOB, hw->dvob); + OUTREG(DVOC, hw->dvoc); + + /* undo funky magic */ + OUTREG(0x61204, 0x00000000); + + /* Set ADPA */ + OUTREG(ADPA, INREG(ADPA) | ADPA_DAC_ENABLE); + OUTREG(ADPA, (hw->adpa & ~(ADPA_DPMS_CONTROL_MASK)) | ADPA_DPMS_D3); + + /* Set pipe parameters */ + OUTREG(hsync_reg, *hs); + OUTREG(hblank_reg, *hb); + OUTREG(htotal_reg, *ht); + OUTREG(vsync_reg, *vs); + OUTREG(vblank_reg, *vb); + OUTREG(vtotal_reg, *vt); + OUTREG(src_size_reg, *ss); + + switch (dinfo->info->var.vmode & (FB_VMODE_INTERLACED | + FB_VMODE_ODD_FLD_FIRST)) { + case FB_VMODE_INTERLACED | FB_VMODE_ODD_FLD_FIRST: + OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_ODD_EN); + break; + case FB_VMODE_INTERLACED: /* even lines first */ + OUTREG(pipe_stat_reg, 0xFFFF | PIPESTAT_FLD_EVT_EVEN_EN); + break; + default: /* non-interlaced */ + OUTREG(pipe_stat_reg, 0xFFFF); /* clear all status bits only */ + } + /* Enable pipe */ + OUTREG(pipe_conf_reg, *pipe_conf | PIPECONF_ENABLE); + + /* Enable sync */ + tmp = INREG(ADPA); + tmp &= ~ADPA_DPMS_CONTROL_MASK; + tmp |= ADPA_DPMS_D0; + OUTREG(ADPA, tmp); + + /* setup display plane */ + if (dinfo->pdev->device == PCI_DEVICE_ID_INTEL_830M) { + /* + * i830M errata: the display plane must be enabled + * to allow writes to the other bits in the plane + * control register. + */ + tmp = INREG(DSPACNTR); + if ((tmp & DISPPLANE_PLANE_ENABLE) != DISPPLANE_PLANE_ENABLE) { + tmp |= DISPPLANE_PLANE_ENABLE; + OUTREG(DSPACNTR, tmp); + OUTREG(DSPACNTR, + hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE); + mdelay(1); + } + } + + OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE); + OUTREG(DSPASTRIDE, hw->disp_a_stride); + OUTREG(DSPABASE, hw->disp_a_base); + + /* Enable plane */ + if (!blank) { + tmp = INREG(DSPACNTR); + tmp |= DISPPLANE_PLANE_ENABLE; + OUTREG(DSPACNTR, tmp); + OUTREG(DSPABASE, hw->disp_a_base); + } + + return 0; +} + +/* forward declarations */ +static void refresh_ring(struct intelfb_info *dinfo); +static void reset_state(struct intelfb_info *dinfo); +static void do_flush(struct intelfb_info *dinfo); + +static u32 get_ring_space(struct intelfb_info *dinfo) +{ + u32 ring_space; + + if (dinfo->ring_tail >= dinfo->ring_head) + ring_space = dinfo->ring.size - + (dinfo->ring_tail - dinfo->ring_head); + else + ring_space = dinfo->ring_head - dinfo->ring_tail; + + if (ring_space > RING_MIN_FREE) + ring_space -= RING_MIN_FREE; + else + ring_space = 0; + + return ring_space; +} + +static int wait_ring(struct intelfb_info *dinfo, int n) +{ + int i = 0; + unsigned long end; + u32 last_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK; + +#if VERBOSE > 0 + DBG_MSG("wait_ring: %d\n", n); +#endif + + end = jiffies + (HZ * 3); + while (dinfo->ring_space < n) { + dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK; + dinfo->ring_space = get_ring_space(dinfo); + + if (dinfo->ring_head != last_head) { + end = jiffies + (HZ * 3); + last_head = dinfo->ring_head; + } + i++; + if (time_before(end, jiffies)) { + if (!i) { + /* Try again */ + reset_state(dinfo); + refresh_ring(dinfo); + do_flush(dinfo); + end = jiffies + (HZ * 3); + i = 1; + } else { + WRN_MSG("ring buffer : space: %d wanted %d\n", + dinfo->ring_space, n); + WRN_MSG("lockup - turning off hardware " + "acceleration\n"); + dinfo->ring_lockup = 1; + break; + } + } + udelay(1); + } + return i; +} + +static void do_flush(struct intelfb_info *dinfo) +{ + START_RING(2); + OUT_RING(MI_FLUSH | MI_WRITE_DIRTY_STATE | MI_INVALIDATE_MAP_CACHE); + OUT_RING(MI_NOOP); + ADVANCE_RING(); +} + +void intelfbhw_do_sync(struct intelfb_info *dinfo) +{ +#if VERBOSE > 0 + DBG_MSG("intelfbhw_do_sync\n"); +#endif + + if (!dinfo->accel) + return; + + /* + * Send a flush, then wait until the ring is empty. This is what + * the XFree86 driver does, and actually it doesn't seem a lot worse + * than the recommended method (both have problems). + */ + do_flush(dinfo); + wait_ring(dinfo, dinfo->ring.size - RING_MIN_FREE); + dinfo->ring_space = dinfo->ring.size - RING_MIN_FREE; +} + +static void refresh_ring(struct intelfb_info *dinfo) +{ +#if VERBOSE > 0 + DBG_MSG("refresh_ring\n"); +#endif + + dinfo->ring_head = INREG(PRI_RING_HEAD) & RING_HEAD_MASK; + dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK; + dinfo->ring_space = get_ring_space(dinfo); +} + +static void reset_state(struct intelfb_info *dinfo) +{ + int i; + u32 tmp; + +#if VERBOSE > 0 + DBG_MSG("reset_state\n"); +#endif + + for (i = 0; i < FENCE_NUM; i++) + OUTREG(FENCE + (i << 2), 0); + + /* Flush the ring buffer if it's enabled. */ + tmp = INREG(PRI_RING_LENGTH); + if (tmp & RING_ENABLE) { +#if VERBOSE > 0 + DBG_MSG("reset_state: ring was enabled\n"); +#endif + refresh_ring(dinfo); + intelfbhw_do_sync(dinfo); + DO_RING_IDLE(); + } + + OUTREG(PRI_RING_LENGTH, 0); + OUTREG(PRI_RING_HEAD, 0); + OUTREG(PRI_RING_TAIL, 0); + OUTREG(PRI_RING_START, 0); +} + +/* Stop the 2D engine, and turn off the ring buffer. */ +void intelfbhw_2d_stop(struct intelfb_info *dinfo) +{ +#if VERBOSE > 0 + DBG_MSG("intelfbhw_2d_stop: accel: %d, ring_active: %d\n", + dinfo->accel, dinfo->ring_active); +#endif + + if (!dinfo->accel) + return; + + dinfo->ring_active = 0; + reset_state(dinfo); +} + +/* + * Enable the ring buffer, and initialise the 2D engine. + * It is assumed that the graphics engine has been stopped by previously + * calling intelfb_2d_stop(). + */ +void intelfbhw_2d_start(struct intelfb_info *dinfo) +{ +#if VERBOSE > 0 + DBG_MSG("intelfbhw_2d_start: accel: %d, ring_active: %d\n", + dinfo->accel, dinfo->ring_active); +#endif + + if (!dinfo->accel) + return; + + /* Initialise the primary ring buffer. */ + OUTREG(PRI_RING_LENGTH, 0); + OUTREG(PRI_RING_TAIL, 0); + OUTREG(PRI_RING_HEAD, 0); + + OUTREG(PRI_RING_START, dinfo->ring.physical & RING_START_MASK); + OUTREG(PRI_RING_LENGTH, + ((dinfo->ring.size - GTT_PAGE_SIZE) & RING_LENGTH_MASK) | + RING_NO_REPORT | RING_ENABLE); + refresh_ring(dinfo); + dinfo->ring_active = 1; +} + +/* 2D fillrect (solid fill or invert) */ +void intelfbhw_do_fillrect(struct intelfb_info *dinfo, u32 x, u32 y, u32 w, + u32 h, u32 color, u32 pitch, u32 bpp, u32 rop) +{ + u32 br00, br09, br13, br14, br16; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_do_fillrect: (%d,%d) %dx%d, c 0x%06x, p %d bpp %d, " + "rop 0x%02x\n", x, y, w, h, color, pitch, bpp, rop); +#endif + + br00 = COLOR_BLT_CMD; + br09 = dinfo->fb_start + (y * pitch + x * (bpp / 8)); + br13 = (rop << ROP_SHIFT) | pitch; + br14 = (h << HEIGHT_SHIFT) | ((w * (bpp / 8)) << WIDTH_SHIFT); + br16 = color; + + switch (bpp) { + case 8: + br13 |= COLOR_DEPTH_8; + break; + case 16: + br13 |= COLOR_DEPTH_16; + break; + case 32: + br13 |= COLOR_DEPTH_32; + br00 |= WRITE_ALPHA | WRITE_RGB; + break; + } + + START_RING(6); + OUT_RING(br00); + OUT_RING(br13); + OUT_RING(br14); + OUT_RING(br09); + OUT_RING(br16); + OUT_RING(MI_NOOP); + ADVANCE_RING(); + +#if VERBOSE > 0 + DBG_MSG("ring = 0x%08x, 0x%08x (%d)\n", dinfo->ring_head, + dinfo->ring_tail, dinfo->ring_space); +#endif +} + +void +intelfbhw_do_bitblt(struct intelfb_info *dinfo, u32 curx, u32 cury, + u32 dstx, u32 dsty, u32 w, u32 h, u32 pitch, u32 bpp) +{ + u32 br00, br09, br11, br12, br13, br22, br23, br26; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_do_bitblt: (%d,%d)->(%d,%d) %dx%d, p %d bpp %d\n", + curx, cury, dstx, dsty, w, h, pitch, bpp); +#endif + + br00 = XY_SRC_COPY_BLT_CMD; + br09 = dinfo->fb_start; + br11 = (pitch << PITCH_SHIFT); + br12 = dinfo->fb_start; + br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT); + br22 = (dstx << WIDTH_SHIFT) | (dsty << HEIGHT_SHIFT); + br23 = ((dstx + w) << WIDTH_SHIFT) | + ((dsty + h) << HEIGHT_SHIFT); + br26 = (curx << WIDTH_SHIFT) | (cury << HEIGHT_SHIFT); + + switch (bpp) { + case 8: + br13 |= COLOR_DEPTH_8; + break; + case 16: + br13 |= COLOR_DEPTH_16; + break; + case 32: + br13 |= COLOR_DEPTH_32; + br00 |= WRITE_ALPHA | WRITE_RGB; + break; + } + + START_RING(8); + OUT_RING(br00); + OUT_RING(br13); + OUT_RING(br22); + OUT_RING(br23); + OUT_RING(br09); + OUT_RING(br26); + OUT_RING(br11); + OUT_RING(br12); + ADVANCE_RING(); +} + +int intelfbhw_do_drawglyph(struct intelfb_info *dinfo, u32 fg, u32 bg, u32 w, + u32 h, const u8* cdat, u32 x, u32 y, u32 pitch, + u32 bpp) +{ + int nbytes, ndwords, pad, tmp; + u32 br00, br09, br13, br18, br19, br22, br23; + int dat, ix, iy, iw; + int i, j; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_do_drawglyph: (%d,%d) %dx%d\n", x, y, w, h); +#endif + + /* size in bytes of a padded scanline */ + nbytes = ROUND_UP_TO(w, 16) / 8; + + /* Total bytes of padded scanline data to write out. */ + nbytes = nbytes * h; + + /* + * Check if the glyph data exceeds the immediate mode limit. + * It would take a large font (1K pixels) to hit this limit. + */ + if (nbytes > MAX_MONO_IMM_SIZE) + return 0; + + /* Src data is packaged a dword (32-bit) at a time. */ + ndwords = ROUND_UP_TO(nbytes, 4) / 4; + + /* + * Ring has to be padded to a quad word. But because the command starts + with 7 bytes, pad only if there is an even number of ndwords + */ + pad = !(ndwords % 2); + + tmp = (XY_MONO_SRC_IMM_BLT_CMD & DW_LENGTH_MASK) + ndwords; + br00 = (XY_MONO_SRC_IMM_BLT_CMD & ~DW_LENGTH_MASK) | tmp; + br09 = dinfo->fb_start; + br13 = (SRC_ROP_GXCOPY << ROP_SHIFT) | (pitch << PITCH_SHIFT); + br18 = bg; + br19 = fg; + br22 = (x << WIDTH_SHIFT) | (y << HEIGHT_SHIFT); + br23 = ((x + w) << WIDTH_SHIFT) | ((y + h) << HEIGHT_SHIFT); + + switch (bpp) { + case 8: + br13 |= COLOR_DEPTH_8; + break; + case 16: + br13 |= COLOR_DEPTH_16; + break; + case 32: + br13 |= COLOR_DEPTH_32; + br00 |= WRITE_ALPHA | WRITE_RGB; + break; + } + + START_RING(8 + ndwords); + OUT_RING(br00); + OUT_RING(br13); + OUT_RING(br22); + OUT_RING(br23); + OUT_RING(br09); + OUT_RING(br18); + OUT_RING(br19); + ix = iy = 0; + iw = ROUND_UP_TO(w, 8) / 8; + while (ndwords--) { + dat = 0; + for (j = 0; j < 2; ++j) { + for (i = 0; i < 2; ++i) { + if (ix != iw || i == 0) + dat |= cdat[iy*iw + ix++] << (i+j*2)*8; + } + if (ix == iw && iy != (h-1)) { + ix = 0; + ++iy; + } + } + OUT_RING(dat); + } + if (pad) + OUT_RING(MI_NOOP); + ADVANCE_RING(); + + return 1; +} + +/* HW cursor functions. */ +void intelfbhw_cursor_init(struct intelfb_info *dinfo) +{ + u32 tmp; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_init\n"); +#endif + + if (dinfo->mobile || IS_I9XX(dinfo)) { + if (!dinfo->cursor.physical) + return; + tmp = INREG(CURSOR_A_CONTROL); + tmp &= ~(CURSOR_MODE_MASK | CURSOR_MOBILE_GAMMA_ENABLE | + CURSOR_MEM_TYPE_LOCAL | + (1 << CURSOR_PIPE_SELECT_SHIFT)); + tmp |= CURSOR_MODE_DISABLE; + OUTREG(CURSOR_A_CONTROL, tmp); + OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical); + } else { + tmp = INREG(CURSOR_CONTROL); + tmp &= ~(CURSOR_FORMAT_MASK | CURSOR_GAMMA_ENABLE | + CURSOR_ENABLE | CURSOR_STRIDE_MASK); + tmp |= CURSOR_FORMAT_3C; + OUTREG(CURSOR_CONTROL, tmp); + OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.offset << 12); + tmp = (64 << CURSOR_SIZE_H_SHIFT) | + (64 << CURSOR_SIZE_V_SHIFT); + OUTREG(CURSOR_SIZE, tmp); + } +} + +void intelfbhw_cursor_hide(struct intelfb_info *dinfo) +{ + u32 tmp; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_hide\n"); +#endif + + dinfo->cursor_on = 0; + if (dinfo->mobile || IS_I9XX(dinfo)) { + if (!dinfo->cursor.physical) + return; + tmp = INREG(CURSOR_A_CONTROL); + tmp &= ~CURSOR_MODE_MASK; + tmp |= CURSOR_MODE_DISABLE; + OUTREG(CURSOR_A_CONTROL, tmp); + /* Flush changes */ + OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical); + } else { + tmp = INREG(CURSOR_CONTROL); + tmp &= ~CURSOR_ENABLE; + OUTREG(CURSOR_CONTROL, tmp); + } +} + +void intelfbhw_cursor_show(struct intelfb_info *dinfo) +{ + u32 tmp; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_show\n"); +#endif + + dinfo->cursor_on = 1; + + if (dinfo->cursor_blanked) + return; + + if (dinfo->mobile || IS_I9XX(dinfo)) { + if (!dinfo->cursor.physical) + return; + tmp = INREG(CURSOR_A_CONTROL); + tmp &= ~CURSOR_MODE_MASK; + tmp |= CURSOR_MODE_64_4C_AX; + OUTREG(CURSOR_A_CONTROL, tmp); + /* Flush changes */ + OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical); + } else { + tmp = INREG(CURSOR_CONTROL); + tmp |= CURSOR_ENABLE; + OUTREG(CURSOR_CONTROL, tmp); + } +} + +void intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y) +{ + u32 tmp; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_setpos: (%d, %d)\n", x, y); +#endif + + /* + * Sets the position. The coordinates are assumed to already + * have any offset adjusted. Assume that the cursor is never + * completely off-screen, and that x, y are always >= 0. + */ + + tmp = ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT) | + ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT); + OUTREG(CURSOR_A_POSITION, tmp); + + if (IS_I9XX(dinfo)) + OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical); +} + +void intelfbhw_cursor_setcolor(struct intelfb_info *dinfo, u32 bg, u32 fg) +{ +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_setcolor\n"); +#endif + + OUTREG(CURSOR_A_PALETTE0, bg & CURSOR_PALETTE_MASK); + OUTREG(CURSOR_A_PALETTE1, fg & CURSOR_PALETTE_MASK); + OUTREG(CURSOR_A_PALETTE2, fg & CURSOR_PALETTE_MASK); + OUTREG(CURSOR_A_PALETTE3, bg & CURSOR_PALETTE_MASK); +} + +void intelfbhw_cursor_load(struct intelfb_info *dinfo, int width, int height, + u8 *data) +{ + u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual; + int i, j, w = width / 8; + int mod = width % 8, t_mask, d_mask; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_load\n"); +#endif + + if (!dinfo->cursor.virtual) + return; + + t_mask = 0xff >> mod; + d_mask = ~(0xff >> mod); + for (i = height; i--; ) { + for (j = 0; j < w; j++) { + writeb(0x00, addr + j); + writeb(*(data++), addr + j+8); + } + if (mod) { + writeb(t_mask, addr + j); + writeb(*(data++) & d_mask, addr + j+8); + } + addr += 16; + } +} + +void intelfbhw_cursor_reset(struct intelfb_info *dinfo) +{ + u8 __iomem *addr = (u8 __iomem *)dinfo->cursor.virtual; + int i, j; + +#if VERBOSE > 0 + DBG_MSG("intelfbhw_cursor_reset\n"); +#endif + + if (!dinfo->cursor.virtual) + return; + + for (i = 64; i--; ) { + for (j = 0; j < 8; j++) { + writeb(0xff, addr + j+0); + writeb(0x00, addr + j+8); + } + addr += 16; + } +} + +static irqreturn_t intelfbhw_irq(int irq, void *dev_id) +{ + u16 tmp; + struct intelfb_info *dinfo = dev_id; + + spin_lock(&dinfo->int_lock); + + tmp = INREG16(IIR); + if (dinfo->info->var.vmode & FB_VMODE_INTERLACED) + tmp &= PIPE_A_EVENT_INTERRUPT; + else + tmp &= VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */ + + if (tmp == 0) { + spin_unlock(&dinfo->int_lock); + return IRQ_RETVAL(0); /* not us */ + } + + /* clear status bits 0-15 ASAP and don't touch bits 16-31 */ + OUTREG(PIPEASTAT, INREG(PIPEASTAT)); + + OUTREG16(IIR, tmp); + if (dinfo->vsync.pan_display) { + dinfo->vsync.pan_display = 0; + OUTREG(DSPABASE, dinfo->vsync.pan_offset); + } + + dinfo->vsync.count++; + wake_up_interruptible(&dinfo->vsync.wait); + + spin_unlock(&dinfo->int_lock); + + return IRQ_RETVAL(1); +} + +int intelfbhw_enable_irq(struct intelfb_info *dinfo) +{ + u16 tmp; + if (!test_and_set_bit(0, &dinfo->irq_flags)) { + if (request_irq(dinfo->pdev->irq, intelfbhw_irq, IRQF_SHARED, + "intelfb", dinfo)) { + clear_bit(0, &dinfo->irq_flags); + return -EINVAL; + } + + spin_lock_irq(&dinfo->int_lock); + OUTREG16(HWSTAM, 0xfffe); /* i830 DRM uses ffff */ + OUTREG16(IMR, 0); + } else + spin_lock_irq(&dinfo->int_lock); + + if (dinfo->info->var.vmode & FB_VMODE_INTERLACED) + tmp = PIPE_A_EVENT_INTERRUPT; + else + tmp = VSYNC_PIPE_A_INTERRUPT; /* non-interlaced */ + if (tmp != INREG16(IER)) { + DBG_MSG("changing IER to 0x%X\n", tmp); + OUTREG16(IER, tmp); + } + + spin_unlock_irq(&dinfo->int_lock); + return 0; +} + +void intelfbhw_disable_irq(struct intelfb_info *dinfo) +{ + if (test_and_clear_bit(0, &dinfo->irq_flags)) { + if (dinfo->vsync.pan_display) { + dinfo->vsync.pan_display = 0; + OUTREG(DSPABASE, dinfo->vsync.pan_offset); + } + spin_lock_irq(&dinfo->int_lock); + OUTREG16(HWSTAM, 0xffff); + OUTREG16(IMR, 0xffff); + OUTREG16(IER, 0x0); + + OUTREG16(IIR, INREG16(IIR)); /* clear IRQ requests */ + spin_unlock_irq(&dinfo->int_lock); + + free_irq(dinfo->pdev->irq, dinfo); + } +} + +int intelfbhw_wait_for_vsync(struct intelfb_info *dinfo, u32 pipe) +{ + struct intelfb_vsync *vsync; + unsigned int count; + int ret; + + switch (pipe) { + case 0: + vsync = &dinfo->vsync; + break; + default: + return -ENODEV; + } + + ret = intelfbhw_enable_irq(dinfo); + if (ret) + return ret; + + count = vsync->count; + ret = wait_event_interruptible_timeout(vsync->wait, + count != vsync->count, HZ / 10); + if (ret < 0) + return ret; + if (ret == 0) { + DBG_MSG("wait_for_vsync timed out!\n"); + return -ETIMEDOUT; + } + + return 0; +} |