[POWERPC] XilinxFB: Split device setup from bus binding

Split the device setup code away from the platform bus binding.  This is
in preparation for adding the of_platform bus binding to this driver and
most of the setup code is common between the two busses.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Andrei Konovalov <akonovalov@ru.mvista.com>

diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index 9aa754a..12d9127 100644 (file)
--- a/drivers/video/xilinxfb.c
+++ b/drivers/video/xilinxfb.c
@@ -196,23 +196,17 @@ 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) {
                dev_err(dev, "Couldn't allocate device private record\n");
@@ -221,40 +215,39 @@ xilinxfb_drv_probe(struct device *dev)
        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)) {
-               dev_err(dev, "Couldn't get registers resource\n");
-               retval = -EFAULT;
+       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)) {
-               dev_err(dev, "Couldn't lock memory region at 0x%08X\n",
-                      regs_res->start);
-               retval = -EBUSY;
-               goto err_region;
+       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) {
                dev_err(dev, "Could not allocate frame buffer memory\n");
-               retval = -ENOMEM;
+               rc = -ENOMEM;
                goto err_fbmem;
        }
 
        /* Clear (turn to black) the framebuffer */
-       memset_io((void *) drvdata->fb_virt, 0, FB_SIZE);
+       memset_io(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);
 
@@ -265,31 +258,29 @@ xilinxfb_drv_probe(struct device *dev)
        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) {
+       /* 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 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) {
+       rc = register_framebuffer(&drvdata->info);
+       if (rc) {
                dev_err(dev, "Could not register frame buffer\n");
-               retval = -EINVAL;
                goto err_regfb;
        }
 
        /* Put a banner in the log (for DEBUG) */
-       dev_dbg(dev, "regs: phys=%x, virt=%p\n",
-               drvdata->regs_phys, drvdata->regs);
+       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 */
@@ -300,30 +291,25 @@ err_regfb:
 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);
-       iounmap(drvdata->regs);
 
 err_fbmem:
-       release_mem_region(regs_res->start, 8);
+       iounmap(drvdata->regs);
+
+err_map:
+       release_mem_region(physaddr, 8);
 
 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);
@@ -348,6 +334,47 @@ xilinxfb_drv_remove(struct device *dev)
        return 0;
 }
 
+/* ---------------------------------------------------------------------
+ * Platform bus binding
+ */
+
+static int
+xilinxfb_drv_probe(struct device *dev)
+{
+       struct platform_device *pdev;
+       struct xilinxfb_platform_data *pdata;
+       struct resource *res;
+       int width_mm;
+       int height_mm;
+       int rotate;
+
+       pdev = to_platform_device(dev);
+       pdata = pdev->dev.platform_data;
+       if (!pdata) {
+               dev_err(dev, "Missing pdata structure\n");
+               return -ENODEV;
+       }
+
+       /* Find the registers address */
+       res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+       if (!res) {
+               dev_err(dev, "Couldn't get registers resource\n");
+               return -ENODEV;
+       }
+
+       height_mm = pdata->screen_height_mm;
+       width_mm = pdata->screen_width_mm;
+       rotate = pdata->rotate_screen ? 1 : 0;
+
+       return xilinxfb_assign(dev, res->start, width_mm, height_mm, rotate);
+}
+
+static int
+xilinxfb_drv_remove(struct device *dev)
+{
+       return xilinxfb_release(dev);
+}
+
 
 static struct device_driver xilinxfb_driver = {
        .name           = DRIVER_NAME,