qemu: complete bochs dispi interface vga driver.

Ditch unused fb*.h files.
Rename init.c (name is _way_ to generic) to bochs.c.
Add proper bochs dispi interface detection and mode setup.
Hook up coreboot framebuffer table initialization.

Change-Id: I7154b1593902e7d42606b64819217872eee10683
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-on: http://review.coreboot.org/3500
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 150 insertions, 0 deletions

diff --git a/src/drivers/emulation/qemu/bochs.c b/src/drivers/emulation/qemu/bochs.c
new file mode 100644
index 0000000000..1fd7e28ef2
--- /dev/null
+++ b/src/drivers/emulation/qemu/bochs.c
@@ -0,0 +1,150 @@
+#include <delay.h>
+#include <stdlib.h>
+#include <string.h>
+#include <arch/io.h>
+
+#include <boot/coreboot_tables.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+
+/* VGA init. We use the Bochs VESA VBE extensions  */
+#define VBE_DISPI_IOPORT_INDEX          0x01CE
+#define VBE_DISPI_IOPORT_DATA           0x01CF
+
+#define VBE_DISPI_INDEX_ID              0x0
+#define VBE_DISPI_INDEX_XRES            0x1
+#define VBE_DISPI_INDEX_YRES            0x2
+#define VBE_DISPI_INDEX_BPP             0x3
+#define VBE_DISPI_INDEX_ENABLE          0x4
+#define VBE_DISPI_INDEX_BANK            0x5
+#define VBE_DISPI_INDEX_VIRT_WIDTH      0x6
+#define VBE_DISPI_INDEX_VIRT_HEIGHT     0x7
+#define VBE_DISPI_INDEX_X_OFFSET        0x8
+#define VBE_DISPI_INDEX_Y_OFFSET        0x9
+#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
+
+#define VBE_DISPI_ID0                   0xB0C0
+#define VBE_DISPI_ID1                   0xB0C1
+#define VBE_DISPI_ID2                   0xB0C2
+#define VBE_DISPI_ID4                   0xB0C4
+#define VBE_DISPI_ID5                   0xB0C5
+
+#define VBE_DISPI_DISABLED              0x00
+#define VBE_DISPI_ENABLED               0x01
+#define VBE_DISPI_LFB_ENABLED           0x40
+#define VBE_DISPI_NOCLEARMEM            0x80
+
+static int width  = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_XRES;
+static int height = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_YRES;
+static u32 addr   = 0;
+
+static void bochs_write(int index, int val)
+{
+	outw(index, VBE_DISPI_IOPORT_INDEX);
+	outw(val, VBE_DISPI_IOPORT_DATA);
+}
+
+static int bochs_read(int index)
+{
+	outw(index, VBE_DISPI_IOPORT_INDEX);
+	return inw(VBE_DISPI_IOPORT_DATA);
+}
+
+static void bochs_init(device_t dev)
+{
+	int id, mem, bar;
+
+	/* bochs dispi detection */
+	id = bochs_read(VBE_DISPI_INDEX_ID);
+	if ((id & 0xfff0) != VBE_DISPI_ID0) {
+		printk(BIOS_DEBUG, "QEMU VGA: bochs dispi: ID mismatch.\n");
+		return;
+	}
+	mem = bochs_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K) * 64 * 1024;
+	printk(BIOS_DEBUG, "QEMU VGA: bochs dispi interface found, "
+	       "%d MiB video memory\n", mem / ( 1024 * 1024));
+
+	/* find lfb pci bar */
+	addr = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
+	if ((addr & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) {
+		/* qemu -vga {std,qxl} */
+		bar = 0;
+	} else {
+		/* qemu -vga vmware */
+		addr = pci_read_config32(dev, PCI_BASE_ADDRESS_1);
+		bar = 1;
+	}
+	addr &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK;
+	printk(BIOS_DEBUG, "QEMU VGA: framebuffer @ %x (pci bar %d)\n",
+	       addr, bar);
+
+	/* setup video mode */
+	bochs_write(VBE_DISPI_INDEX_ENABLE,	 0);
+	bochs_write(VBE_DISPI_INDEX_BANK,	 0);
+	bochs_write(VBE_DISPI_INDEX_BPP,	 32);
+	bochs_write(VBE_DISPI_INDEX_XRES,	 width);
+	bochs_write(VBE_DISPI_INDEX_YRES,	 height);
+	bochs_write(VBE_DISPI_INDEX_VIRT_WIDTH,	 width);
+	bochs_write(VBE_DISPI_INDEX_VIRT_HEIGHT, height);
+	bochs_write(VBE_DISPI_INDEX_X_OFFSET,	 0);
+	bochs_write(VBE_DISPI_INDEX_Y_OFFSET,	 0);
+	bochs_write(VBE_DISPI_INDEX_ENABLE,
+		    VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
+
+	outb(0x20, 0x3c0); /* disable blanking */
+}
+
+int vbe_mode_info_valid(void);
+int vbe_mode_info_valid(void)
+{
+	return addr != 0;
+}
+
+void fill_lb_framebuffer(struct lb_framebuffer *framebuffer);
+void fill_lb_framebuffer(struct lb_framebuffer *framebuffer)
+{
+	printk(BIOS_DEBUG, "QEMU VGA: fill lb_framebuffer: %dx%d @ %x\n",
+	       width, height, addr);
+
+	framebuffer->physical_address = addr;
+	framebuffer->x_resolution = width;
+	framebuffer->y_resolution = height;
+	framebuffer->bytes_per_line = width * 4;
+	framebuffer->bits_per_pixel = 32;
+	framebuffer->red_mask_pos = 16;
+	framebuffer->red_mask_size = 8;
+	framebuffer->green_mask_pos = 8;
+	framebuffer->green_mask_size = 8;
+	framebuffer->blue_mask_pos = 0;
+	framebuffer->blue_mask_size = 8;
+	framebuffer->reserved_mask_pos = 24;
+	framebuffer->reserved_mask_size = 8;
+}
+
+static struct device_operations qemu_graph_ops = {
+	.read_resources	  = pci_dev_read_resources,
+	.set_resources	  = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init		  = bochs_init,
+	.scan_bus	  = 0,
+};
+
+static const struct pci_driver qemu_stdvga_driver __pci_driver = {
+	.ops	= &qemu_graph_ops,
+	.vendor = 0x1234,
+	.device = 0x1111,
+};
+
+static const struct pci_driver qemu_vmware_driver __pci_driver = {
+	.ops	= &qemu_graph_ops,
+	.vendor = 0x15ad,
+	.device = 0x0405,
+};
+static const struct pci_driver qemu_qxl_driver __pci_driver = {
+	.ops	= &qemu_graph_ops,
+	.vendor = 0x1b36,
+	.device = 0x0100,
+};