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- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
- #include "bochs.h"
- /* ---------------------------------------------------------------------- */
- static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val)
- {
- if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
- return;
- if (bochs->mmio) {
- int offset = ioport - 0x3c0 + 0x400;
- writeb(val, bochs->mmio + offset);
- } else {
- outb(val, ioport);
- }
- }
- static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
- {
- u16 ret = 0;
- if (bochs->mmio) {
- int offset = 0x500 + (reg << 1);
- ret = readw(bochs->mmio + offset);
- } else {
- outw(reg, VBE_DISPI_IOPORT_INDEX);
- ret = inw(VBE_DISPI_IOPORT_DATA);
- }
- return ret;
- }
- static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val)
- {
- if (bochs->mmio) {
- int offset = 0x500 + (reg << 1);
- writew(val, bochs->mmio + offset);
- } else {
- outw(reg, VBE_DISPI_IOPORT_INDEX);
- outw(val, VBE_DISPI_IOPORT_DATA);
- }
- }
- int bochs_hw_init(struct drm_device *dev, uint32_t flags)
- {
- struct bochs_device *bochs = dev->dev_private;
- struct pci_dev *pdev = dev->pdev;
- unsigned long addr, size, mem, ioaddr, iosize, qext_size;
- u16 id;
- if (pdev->resource[2].flags & IORESOURCE_MEM) {
- /* mmio bar with vga and bochs registers present */
- if (pci_request_region(pdev, 2, "bochs-drm") != 0) {
- DRM_ERROR("Cannot request mmio region\n");
- return -EBUSY;
- }
- ioaddr = pci_resource_start(pdev, 2);
- iosize = pci_resource_len(pdev, 2);
- bochs->mmio = ioremap(ioaddr, iosize);
- if (bochs->mmio == NULL) {
- DRM_ERROR("Cannot map mmio region\n");
- return -ENOMEM;
- }
- } else {
- ioaddr = VBE_DISPI_IOPORT_INDEX;
- iosize = 2;
- if (!request_region(ioaddr, iosize, "bochs-drm")) {
- DRM_ERROR("Cannot request ioports\n");
- return -EBUSY;
- }
- bochs->ioports = 1;
- }
- id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID);
- mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K)
- * 64 * 1024;
- if ((id & 0xfff0) != VBE_DISPI_ID0) {
- DRM_ERROR("ID mismatch\n");
- return -ENODEV;
- }
- if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0)
- return -ENODEV;
- addr = pci_resource_start(pdev, 0);
- size = pci_resource_len(pdev, 0);
- if (addr == 0)
- return -ENODEV;
- if (size != mem) {
- DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n",
- size, mem);
- size = min(size, mem);
- }
- if (pci_request_region(pdev, 0, "bochs-drm") != 0) {
- DRM_ERROR("Cannot request framebuffer\n");
- return -EBUSY;
- }
- bochs->fb_map = ioremap(addr, size);
- if (bochs->fb_map == NULL) {
- DRM_ERROR("Cannot map framebuffer\n");
- return -ENOMEM;
- }
- bochs->fb_base = addr;
- bochs->fb_size = size;
- DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);
- DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n",
- size / 1024, addr,
- bochs->ioports ? "ioports" : "mmio",
- ioaddr);
- if (bochs->mmio && pdev->revision >= 2) {
- qext_size = readl(bochs->mmio + 0x600);
- if (qext_size < 4 || qext_size > iosize)
- goto noext;
- DRM_DEBUG("Found qemu ext regs, size %ld\n", qext_size);
- if (qext_size >= 8) {
- #ifdef __BIG_ENDIAN
- writel(0xbebebebe, bochs->mmio + 0x604);
- #else
- writel(0x1e1e1e1e, bochs->mmio + 0x604);
- #endif
- DRM_DEBUG(" qext endian: 0x%x\n",
- readl(bochs->mmio + 0x604));
- }
- }
- noext:
- return 0;
- }
- void bochs_hw_fini(struct drm_device *dev)
- {
- struct bochs_device *bochs = dev->dev_private;
- if (bochs->mmio)
- iounmap(bochs->mmio);
- if (bochs->ioports)
- release_region(VBE_DISPI_IOPORT_INDEX, 2);
- if (bochs->fb_map)
- iounmap(bochs->fb_map);
- pci_release_regions(dev->pdev);
- }
- void bochs_hw_setmode(struct bochs_device *bochs,
- struct drm_display_mode *mode)
- {
- bochs->xres = mode->hdisplay;
- bochs->yres = mode->vdisplay;
- bochs->bpp = 32;
- bochs->stride = mode->hdisplay * (bochs->bpp / 8);
- bochs->yres_virtual = bochs->fb_size / bochs->stride;
- DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n",
- bochs->xres, bochs->yres, bochs->bpp,
- bochs->yres_virtual);
- bochs_vga_writeb(bochs, 0x3c0, 0x20); /* unblank */
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE, 0);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP, bochs->bpp);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES, bochs->xres);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES, bochs->yres);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK, 0);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, bochs->xres);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT,
- bochs->yres_virtual);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, 0);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, 0);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
- VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
- }
- void bochs_hw_setbase(struct bochs_device *bochs,
- int x, int y, u64 addr)
- {
- unsigned long offset = (unsigned long)addr +
- y * bochs->stride +
- x * (bochs->bpp / 8);
- int vy = offset / bochs->stride;
- int vx = (offset % bochs->stride) * 8 / bochs->bpp;
- DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",
- x, y, addr, offset, vx, vy);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
- bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
- }
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