1 // SPDX-License-Identifier: GPL-2.0-or-later
20 #include <video/vga.h>
22 /* ---------------------------------------------------------------------- */
53 static int bochs_modeset = -1;
65 /* ---------------------------------------------------------------------- */
96 /* ---------------------------------------------------------------------- */
103 	if (bochs->mmio) {  in bochs_vga_writeb()
104 		int offset = ioport - 0x3c0 + 0x400;  in bochs_vga_writeb()
106 		writeb(val, bochs->mmio + offset);  in bochs_vga_writeb()
117 	if (bochs->mmio) {  in bochs_vga_readb()
118 		int offset = ioport - 0x3c0 + 0x400;  in bochs_vga_readb()
120 		return readb(bochs->mmio + offset);  in bochs_vga_readb()
130 	if (bochs->mmio) {  in bochs_dispi_read()
133 		ret = readw(bochs->mmio + offset);  in bochs_dispi_read()
143 	if (bochs->mmio) {  in bochs_dispi_write()
146 		writew(val, bochs->mmio + offset);  in bochs_dispi_write()
155 	if (bochs->qext_size < 8)  in bochs_hw_set_big_endian()
158 	writel(0xbebebebe, bochs->mmio + 0x604);  in bochs_hw_set_big_endian()
163 	if (bochs->qext_size < 8)  in bochs_hw_set_little_endian()
166 	writel(0x1e1e1e1e, bochs->mmio + 0x604);  in bochs_hw_set_little_endian()
181 	if (start + len > 0x400 /* vga register offset */)  in bochs_get_edid_block()
182 		return -1;  in bochs_get_edid_block()
185 		buf[i] = readb(bochs->mmio + start + i);  in bochs_get_edid_block()
194 	if (!bochs->mmio)  in bochs_hw_load_edid()
195 		return -1;  in bochs_hw_load_edid()
200 		return -1;  in bochs_hw_load_edid()
202 	drm_edid_free(bochs->drm_edid);  in bochs_hw_load_edid()
203 	bochs->drm_edid = drm_edid_read_custom(&bochs->connector,  in bochs_hw_load_edid()
205 	if (!bochs->drm_edid)  in bochs_hw_load_edid()
206 		return -1;  in bochs_hw_load_edid()
213 	struct bochs_device *bochs = dev->dev_private;  in bochs_hw_init()
214 	struct pci_dev *pdev = to_pci_dev(dev->dev);  in bochs_hw_init()
218 	if (pdev->resource[2].flags & IORESOURCE_MEM) {  in bochs_hw_init()
219 		/* mmio bar with vga and bochs registers present */  in bochs_hw_init()
220 		if (pci_request_region(pdev, 2, "bochs-drm") != 0) {  in bochs_hw_init()
222 			return -EBUSY;  in bochs_hw_init()
226 		bochs->mmio = ioremap(ioaddr, iosize);  in bochs_hw_init()
227 		if (bochs->mmio == NULL) {  in bochs_hw_init()
229 			return -ENOMEM;  in bochs_hw_init()
234 		if (!request_region(ioaddr, iosize, "bochs-drm")) {  in bochs_hw_init()
236 			return -EBUSY;  in bochs_hw_init()
238 		bochs->ioports = 1;  in bochs_hw_init()
246 		return -ENODEV;  in bochs_hw_init()
249 	if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0)  in bochs_hw_init()
250 		return -ENODEV;  in bochs_hw_init()
254 		return -ENODEV;  in bochs_hw_init()
261 	if (pci_request_region(pdev, 0, "bochs-drm") != 0)  in bochs_hw_init()
264 	bochs->fb_map = ioremap(addr, size);  in bochs_hw_init()
265 	if (bochs->fb_map == NULL) {  in bochs_hw_init()
267 		return -ENOMEM;  in bochs_hw_init()
269 	bochs->fb_base = addr;  in bochs_hw_init()
270 	bochs->fb_size = size;  in bochs_hw_init()
272 	DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);  in bochs_hw_init()
275 		 bochs->ioports ? "ioports" : "mmio",  in bochs_hw_init()
278 	if (bochs->mmio && pdev->revision >= 2) {  in bochs_hw_init()
279 		bochs->qext_size = readl(bochs->mmio + 0x600);  in bochs_hw_init()
280 		if (bochs->qext_size < 4 || bochs->qext_size > iosize) {  in bochs_hw_init()
281 			bochs->qext_size = 0;  in bochs_hw_init()
285 			  bochs->qext_size);  in bochs_hw_init()
295 	struct bochs_device *bochs = dev->dev_private;  in bochs_hw_fini()
299 	if (bochs->mmio)  in bochs_hw_fini()
300 		iounmap(bochs->mmio);  in bochs_hw_fini()
301 	if (bochs->ioports)  in bochs_hw_fini()
303 	if (bochs->fb_map)  in bochs_hw_fini()
304 		iounmap(bochs->fb_map);  in bochs_hw_fini()
305 	pci_release_regions(to_pci_dev(dev->dev));  in bochs_hw_fini()
306 	drm_edid_free(bochs->drm_edid);  in bochs_hw_fini()
324 	if (!drm_dev_enter(bochs->dev, &idx))  in bochs_hw_setmode()
327 	bochs->xres = mode->hdisplay;  in bochs_hw_setmode()
328 	bochs->yres = mode->vdisplay;  in bochs_hw_setmode()
329 	bochs->bpp = 32;  in bochs_hw_setmode()
330 	bochs->stride = mode->hdisplay * (bochs->bpp / 8);  in bochs_hw_setmode()
331 	bochs->yres_virtual = bochs->fb_size / bochs->stride;  in bochs_hw_setmode()
334 			 bochs->xres, bochs->yres, bochs->bpp,  in bochs_hw_setmode()
335 			 bochs->yres_virtual);  in bochs_hw_setmode()
340 	bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP,         bochs->bpp);  in bochs_hw_setmode()
341 	bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES,        bochs->xres);  in bochs_hw_setmode()
342 	bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES,        bochs->yres);  in bochs_hw_setmode()
344 	bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH,  bochs->xres);  in bochs_hw_setmode()
346 			  bochs->yres_virtual);  in bochs_hw_setmode()
356 static void bochs_hw_setformat(struct bochs_device *bochs, const struct drm_format_info *format)  in bochs_hw_setformat()  argument
360 	if (!drm_dev_enter(bochs->dev, &idx))  in bochs_hw_setformat()
363 	DRM_DEBUG_DRIVER("format %c%c%c%c\n",  in bochs_hw_setformat()
364 			 (format->format >>  0) & 0xff,  in bochs_hw_setformat()
365 			 (format->format >>  8) & 0xff,  in bochs_hw_setformat()
366 			 (format->format >> 16) & 0xff,  in bochs_hw_setformat()
367 			 (format->format >> 24) & 0xff);  in bochs_hw_setformat()
369 	switch (format->format) {  in bochs_hw_setformat()
378 		DRM_ERROR("%s: Huh? Got framebuffer format 0x%x",  in bochs_hw_setformat()
379 			  __func__, format->format);  in bochs_hw_setformat()
391 	if (!drm_dev_enter(bochs->dev, &idx))  in bochs_hw_setbase()
394 	bochs->stride = stride;  in bochs_hw_setbase()
396 		y * bochs->stride +  in bochs_hw_setbase()
397 		x * (bochs->bpp / 8);  in bochs_hw_setbase()
398 	vy = offset / bochs->stride;  in bochs_hw_setbase()
399 	vx = (offset % bochs->stride) * 8 / bochs->bpp;  in bochs_hw_setbase()
400 	vwidth = stride * 8 / bochs->bpp;  in bochs_hw_setbase()
402 	DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",  in bochs_hw_setbase()
411 /* ---------------------------------------------------------------------- */
423 	if (!state->fb || !bochs->stride)  in bochs_plane_update()
426 	gbo = drm_gem_vram_of_gem(state->fb->obj[0]);  in bochs_plane_update()
432 			 state->crtc_x,  in bochs_plane_update()
433 			 state->crtc_y,  in bochs_plane_update()
434 			 state->fb->pitches[0],  in bochs_plane_update()
435 			 state->fb->offsets[0] + gpu_addr);  in bochs_plane_update()
436 	bochs_hw_setformat(bochs, state->fb->format);  in bochs_plane_update()
443 	struct bochs_device *bochs = pipe->crtc.dev->dev_private;  in bochs_pipe_enable()
445 	bochs_hw_setmode(bochs, &crtc_state->mode);  in bochs_pipe_enable()
451 	struct bochs_device *bochs = pipe->crtc.dev->dev_private;  in bochs_pipe_disable()
459 	struct bochs_device *bochs = pipe->crtc.dev->dev_private;  in bochs_pipe_update()
461 	bochs_plane_update(bochs, pipe->plane.state);  in bochs_pipe_update()
499 	struct bochs_device *bochs = dev->dev_private;  in bochs_connector_init()
500 	struct drm_connector *connector = &bochs->connector;  in bochs_connector_init()
507 	if (bochs->drm_edid) {  in bochs_connector_init()
510 		drm_edid_connector_update(&bochs->connector, bochs->drm_edid);  in bochs_connector_init()
518 	if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 &&  in bochs_gem_fb_create()
519 	    mode_cmd->pixel_format != DRM_FORMAT_BGRX8888)  in bochs_gem_fb_create()
520 		return ERR_PTR(-EINVAL);  in bochs_gem_fb_create()
536 	ret = drmm_mode_config_init(bochs->dev);  in bochs_kms_init()
540 	bochs->dev->mode_config.max_width = 8192;  in bochs_kms_init()
541 	bochs->dev->mode_config.max_height = 8192;  in bochs_kms_init()
543 	bochs->dev->mode_config.preferred_depth = 24;  in bochs_kms_init()
544 	bochs->dev->mode_config.prefer_shadow = 0;  in bochs_kms_init()
545 	bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true;  in bochs_kms_init()
547 	bochs->dev->mode_config.funcs = &bochs_mode_funcs;  in bochs_kms_init()
549 	bochs_connector_init(bochs->dev);  in bochs_kms_init()
550 	drm_simple_display_pipe_init(bochs->dev,  in bochs_kms_init()
551 				     &bochs->pipe,  in bochs_kms_init()
556 				     &bochs->connector);  in bochs_kms_init()
558 	drm_mode_config_reset(bochs->dev);  in bochs_kms_init()
563 /* ---------------------------------------------------------------------- */
573 		return -ENOMEM;  in bochs_load()
574 	dev->dev_private = bochs;  in bochs_load()
575 	bochs->dev = dev;  in bochs_load()
581 	ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size);  in bochs_load()
601 	.name			= "bochs-drm",
602 	.desc			= "bochs dispi vga interface (qemu stdvga)",
609 /* ---------------------------------------------------------------------- */
633 /* ---------------------------------------------------------------------- */
645 		return -ENOMEM;  in bochs_pci_probe()
652 	dev = drm_dev_alloc(&bochs_driver, &pdev->dev);  in bochs_pci_probe()
721 	.name =		"bochs-drm",
729 /* ---------------------------------------------------------------------- */
736 MODULE_DESCRIPTION("DRM Support for bochs dispi vga interface (qemu stdvga)");