Merge branch 'virtex-for-2.6.24' of git://git.secretlab.ca/git/linux-2.6-virtex into for-2.6.24-4xx

1 files changed, 199 insertions, 80 deletions

diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index 4bc67ab56afa..dec602c23075 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);