1 files changed, 199 insertions, 80 deletions

diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index 4bc67ab56af..dec602c2307 100644
--- a/drivers/video/xilinxfb.c
+++ b/drivers/video/xilinxfb.c
@@ -6,9 +6,12 @@
  * Author: MontaVista Software, Inc.
  *         source@mvista.com
  *
- * 2002-2007 (c) MontaVista Software, Inc.  This file is licensed under the
- * terms of the GNU General Public License version 2.  This program is licensed
- * "as is" without any warranty of any kind, whether express or implied.
+ * 2002-2007 (c) MontaVista Software, Inc.
+ * 2007 (c) Secret Lab Technologies, Ltd.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
  */
 
 /*
@@ -18,6 +21,7 @@
  * Geert Uytterhoeven.
  */
 
+#include <linux/device.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/version.h>
@@ -28,7 +32,10 @@
 #include <linux/init.h>
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
-
+#if defined(CONFIG_OF)
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#endif
 #include <asm/io.h>
 #include <linux/xilinxfb.h>
 
@@ -111,7 +118,7 @@ struct xilinxfb_drvdata {
 	u32		regs_phys;	/* phys. address of the control registers */
 	u32 __iomem	*regs;		/* virt. address of the control registers */
 
-	unsigned char __iomem	*fb_virt;	/* virt. address of the frame buffer */
+	void		*fb_virt;	/* virt. address of the frame buffer */
 	dma_addr_t	fb_phys;	/* phys. address of the frame buffer */
 
 	u32		reg_ctrl_default;
@@ -195,130 +202,120 @@ static struct fb_ops xilinxfb_ops =
 	.fb_imageblit		= cfb_imageblit,
 };
 
-/* === The device driver === */
+/* ---------------------------------------------------------------------
+ * Bus independent setup/teardown
+ */
 
-static int
-xilinxfb_drv_probe(struct device *dev)
+static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
+			   int width_mm, int height_mm, int rotate)
 {
-	struct platform_device *pdev;
-	struct xilinxfb_platform_data *pdata;
 	struct xilinxfb_drvdata *drvdata;
-	struct resource *regs_res;
-	int retval;
-
-	if (!dev)
-		return -EINVAL;
-
-	pdev = to_platform_device(dev);
-	pdata = pdev->dev.platform_data;
+	int rc;
 
+	/* Allocate the driver data region */
 	drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata) {
-		printk(KERN_ERR "Couldn't allocate device private record\n");
+		dev_err(dev, "Couldn't allocate device private record\n");
 		return -ENOMEM;
 	}
 	dev_set_drvdata(dev, drvdata);
 
 	/* Map the control registers in */
-	regs_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	if (!regs_res || (regs_res->end - regs_res->start + 1 < 8)) {
-		printk(KERN_ERR "Couldn't get registers resource\n");
-		retval = -EFAULT;
-		goto failed1;
+	if (!request_mem_region(physaddr, 8, DRIVER_NAME)) {
+		dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
+			physaddr);
+		rc = -ENODEV;
+		goto err_region;
 	}
-
-	if (!request_mem_region(regs_res->start, 8, DRIVER_NAME)) {
-		printk(KERN_ERR
-		       "Couldn't lock memory region at 0x%08X\n",
-		       regs_res->start);
-		retval = -EBUSY;
-		goto failed1;
+	drvdata->regs_phys = physaddr;
+	drvdata->regs = ioremap(physaddr, 8);
+	if (!drvdata->regs) {
+		dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
+			physaddr);
+		rc = -ENODEV;
+		goto err_map;
 	}
-	drvdata->regs = (u32 __iomem*) ioremap(regs_res->start, 8);
-	drvdata->regs_phys = regs_res->start;
 
 	/* Allocate the framebuffer memory */
 	drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(FB_SIZE),
 				&drvdata->fb_phys, GFP_KERNEL);
 	if (!drvdata->fb_virt) {
-		printk(KERN_ERR "Could not allocate frame buffer memory\n");
-		retval = -ENOMEM;
-		goto failed2;
+		dev_err(dev, "Could not allocate frame buffer memory\n");
+		rc = -ENOMEM;
+		goto err_fbmem;
 	}
 
 	/* Clear (turn to black) the framebuffer */
-	memset_io((void *) drvdata->fb_virt, 0, FB_SIZE);
+	memset_io((void __iomem *)drvdata->fb_virt, 0, FB_SIZE);
 
 	/* Tell the hardware where the frame buffer is */
 	xilinx_fb_out_be32(drvdata, REG_FB_ADDR, drvdata->fb_phys);
 
 	/* Turn on the display */
 	drvdata->reg_ctrl_default = REG_CTRL_ENABLE;
-	if (pdata && pdata->rotate_screen)
+	if (rotate)
 		drvdata->reg_ctrl_default |= REG_CTRL_ROTATE;
 	xilinx_fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
 
 	/* Fill struct fb_info */
 	drvdata->info.device = dev;
-	drvdata->info.screen_base = drvdata->fb_virt;
+	drvdata->info.screen_base = (void __iomem *)drvdata->fb_virt;
 	drvdata->info.fbops = &xilinxfb_ops;
 	drvdata->info.fix = xilinx_fb_fix;
 	drvdata->info.fix.smem_start = drvdata->fb_phys;
 	drvdata->info.pseudo_palette = drvdata->pseudo_palette;
+	drvdata->info.flags = FBINFO_DEFAULT;
+	drvdata->info.var = xilinx_fb_var;
+
+	xilinx_fb_var.height = height_mm;
+	xilinx_fb_var.width = width_mm;
 
-	if (fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0) < 0) {
-		printk(KERN_ERR "Fail to allocate colormap (%d entries)\n",
+	/* Allocate a colour map */
+	rc = fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0);
+	if (rc) {
+		dev_err(dev, "Fail to allocate colormap (%d entries)\n",
 			PALETTE_ENTRIES_NO);
-		retval = -EFAULT;
-		goto failed3;
+		goto err_cmap;
 	}
 
-	drvdata->info.flags = FBINFO_DEFAULT;
-	if (pdata) {
-		xilinx_fb_var.height = pdata->screen_height_mm;
-		xilinx_fb_var.width = pdata->screen_width_mm;
-	}
-	drvdata->info.var = xilinx_fb_var;
-
 	/* Register new frame buffer */
-	if (register_framebuffer(&drvdata->info) < 0) {
-		printk(KERN_ERR "Could not register frame buffer\n");
-		retval = -EINVAL;
-		goto failed4;
+	rc = register_framebuffer(&drvdata->info);
+	if (rc) {
+		dev_err(dev, "Could not register frame buffer\n");
+		goto err_regfb;
 	}
 
+	/* Put a banner in the log (for DEBUG) */
+	dev_dbg(dev, "regs: phys=%lx, virt=%p\n", physaddr, drvdata->regs);
+	dev_dbg(dev, "fb: phys=%p, virt=%p, size=%x\n",
+		(void*)drvdata->fb_phys, drvdata->fb_virt, FB_SIZE);
 	return 0;	/* success */
 
-failed4:
+err_regfb:
 	fb_dealloc_cmap(&drvdata->info.cmap);
 
-failed3:
+err_cmap:
 	dma_free_coherent(dev, PAGE_ALIGN(FB_SIZE), drvdata->fb_virt,
 		drvdata->fb_phys);
-
 	/* Turn off the display */
 	xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
+
+err_fbmem:
 	iounmap(drvdata->regs);
 
-failed2:
-	release_mem_region(regs_res->start, 8);
+err_map:
+	release_mem_region(physaddr, 8);
 
-failed1:
+err_region:
 	kfree(drvdata);
 	dev_set_drvdata(dev, NULL);
 
-	return retval;
+	return rc;
 }
 
-static int
-xilinxfb_drv_remove(struct device *dev)
+static int xilinxfb_release(struct device *dev)
 {
-	struct xilinxfb_drvdata *drvdata;
-
-	if (!dev)
-		return -ENODEV;
-
-	drvdata = (struct xilinxfb_drvdata *) dev_get_drvdata(dev);
+	struct xilinxfb_drvdata *drvdata = dev_get_drvdata(dev);
 
 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
 	xilinx_fb_blank(VESA_POWERDOWN, &drvdata->info);
@@ -343,29 +340,151 @@ xilinxfb_drv_remove(struct device *dev)
 	return 0;
 }
 
+/* ---------------------------------------------------------------------
+ * Platform bus binding
+ */
+
+static int
+xilinxfb_platform_probe(struct platform_device *pdev)
+{
+	struct xilinxfb_platform_data *pdata;
+	struct resource *res;
+	int width_mm = 0;
+	int height_mm = 0;
+	int rotate = 0;
+
+	/* Find the registers address */
+	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "Couldn't get registers resource\n");
+		return -ENODEV;
+	}
+
+	/* If a pdata structure is provided, then extract the parameters */
+	pdata = pdev->dev.platform_data;
+	if (pdata) {
+		height_mm = pdata->screen_height_mm;
+		width_mm = pdata->screen_width_mm;
+		rotate = pdata->rotate_screen ? 1 : 0;
+	}
+
+	return xilinxfb_assign(&pdev->dev, res->start, width_mm, height_mm,
+			       rotate);
+}
+
+static int
+xilinxfb_platform_remove(struct platform_device *pdev)
+{
+	return xilinxfb_release(&pdev->dev);
+}
 
-static struct device_driver xilinxfb_driver = {
-	.name		= DRIVER_NAME,
-	.bus		= &platform_bus_type,
 
-	.probe		= xilinxfb_drv_probe,
-	.remove		= xilinxfb_drv_remove
+static struct platform_driver xilinxfb_platform_driver = {
+	.probe		= xilinxfb_platform_probe,
+	.remove		= xilinxfb_platform_remove,
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = DRIVER_NAME,
+	},
 };
 
+/* ---------------------------------------------------------------------
+ * OF bus binding
+ */
+
+#if defined(CONFIG_OF)
+static int __devinit
+xilinxfb_of_probe(struct of_device *op, const struct of_device_id *match)
+{
+	struct resource res;
+	const u32 *prop;
+	int width = 0, height = 0, rotate = 0;
+	int size, rc;
+
+	dev_dbg(&op->dev, "xilinxfb_of_probe(%p, %p)\n", op, match);
+
+	rc = of_address_to_resource(op->node, 0, &res);
+	if (rc) {
+		dev_err(&op->dev, "invalid address\n");
+		return rc;
+	}
+
+	prop = of_get_property(op->node, "display-number", &size);
+	if ((prop) && (size >= sizeof(u32)*2)) {
+		width = prop[0];
+		height = prop[1];
+	}
+
+	if (of_find_property(op->node, "rotate-display", NULL))
+		rotate = 1;
+
+	return xilinxfb_assign(&op->dev, res.start, width, height, rotate);
+}
+
+static int __devexit xilinxfb_of_remove(struct of_device *op)
+{
+	return xilinxfb_release(&op->dev);
+}
+
+/* Match table for of_platform binding */
+static struct of_device_id __devinit xilinxfb_of_match[] = {
+	{ .compatible = "xilinx,ml300-fb", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, xilinxfb_of_match);
+
+static struct of_platform_driver xilinxfb_of_driver = {
+	.owner = THIS_MODULE,
+	.name = DRIVER_NAME,
+	.match_table = xilinxfb_of_match,
+	.probe = xilinxfb_of_probe,
+	.remove = __devexit_p(xilinxfb_of_remove),
+	.driver = {
+		.name = DRIVER_NAME,
+	},
+};
+
+/* Registration helpers to keep the number of #ifdefs to a minimum */
+static inline int __init xilinxfb_of_register(void)
+{
+	pr_debug("xilinxfb: calling of_register_platform_driver()\n");
+	return of_register_platform_driver(&xilinxfb_of_driver);
+}
+
+static inline void __exit xilinxfb_of_unregister(void)
+{
+	of_unregister_platform_driver(&xilinxfb_of_driver);
+}
+#else /* CONFIG_OF */
+/* CONFIG_OF not enabled; do nothing helpers */
+static inline int __init xilinxfb_of_register(void) { return 0; }
+static inline void __exit xilinxfb_of_unregister(void) { }
+#endif /* CONFIG_OF */
+
+/* ---------------------------------------------------------------------
+ * Module setup and teardown
+ */
+
 static int __init
 xilinxfb_init(void)
 {
-	/*
-	 * No kernel boot options used,
-	 * so we just need to register the driver
-	 */
-	return driver_register(&xilinxfb_driver);
+	int rc;
+	rc = xilinxfb_of_register();
+	if (rc)
+		return rc;
+
+	rc = platform_driver_register(&xilinxfb_platform_driver);
+	if (rc)
+		xilinxfb_of_unregister();
+
+	return rc;
 }
 
 static void __exit
 xilinxfb_cleanup(void)
 {
-	driver_unregister(&xilinxfb_driver);
+	platform_driver_unregister(&xilinxfb_platform_driver);
+	xilinxfb_of_unregister();
 }
 
 module_init(xilinxfb_init);