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https://github.com/edk2-porting/linux-next.git
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[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>
This commit is contained in:
Grant Likely
parent
3fb99ce4e2
commit
264776224d
@ -196,23 +196,17 @@ static struct fb_ops xilinxfb_ops =
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.fb_imageblit = cfb_imageblit,
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};
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/* === The device driver === */
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/* ---------------------------------------------------------------------
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* Bus independent setup/teardown
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*/
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static int
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xilinxfb_drv_probe(struct device *dev)
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static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
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int width_mm, int height_mm, int rotate)
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{
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struct platform_device *pdev;
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struct xilinxfb_platform_data *pdata;
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struct xilinxfb_drvdata *drvdata;
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struct resource *regs_res;
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int retval;
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if (!dev)
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return -EINVAL;
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pdev = to_platform_device(dev);
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pdata = pdev->dev.platform_data;
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int rc;
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/* Allocate the driver data region */
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drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
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if (!drvdata) {
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dev_err(dev, "Couldn't allocate device private record\n");
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@ -221,40 +215,39 @@ xilinxfb_drv_probe(struct device *dev)
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dev_set_drvdata(dev, drvdata);
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/* Map the control registers in */
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regs_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!regs_res || (regs_res->end - regs_res->start + 1 < 8)) {
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dev_err(dev, "Couldn't get registers resource\n");
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retval = -EFAULT;
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if (!request_mem_region(physaddr, 8, DRIVER_NAME)) {
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dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
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physaddr);
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rc = -ENODEV;
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goto err_region;
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}
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if (!request_mem_region(regs_res->start, 8, DRIVER_NAME)) {
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dev_err(dev, "Couldn't lock memory region at 0x%08X\n",
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regs_res->start);
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retval = -EBUSY;
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goto err_region;
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drvdata->regs_phys = physaddr;
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drvdata->regs = ioremap(physaddr, 8);
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if (!drvdata->regs) {
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dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
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physaddr);
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rc = -ENODEV;
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goto err_map;
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}
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drvdata->regs = (u32 __iomem*) ioremap(regs_res->start, 8);
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drvdata->regs_phys = regs_res->start;
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/* Allocate the framebuffer memory */
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drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(FB_SIZE),
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&drvdata->fb_phys, GFP_KERNEL);
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if (!drvdata->fb_virt) {
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dev_err(dev, "Could not allocate frame buffer memory\n");
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retval = -ENOMEM;
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rc = -ENOMEM;
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goto err_fbmem;
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}
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/* Clear (turn to black) the framebuffer */
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memset_io((void *) drvdata->fb_virt, 0, FB_SIZE);
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memset_io(drvdata->fb_virt, 0, FB_SIZE);
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/* Tell the hardware where the frame buffer is */
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xilinx_fb_out_be32(drvdata, REG_FB_ADDR, drvdata->fb_phys);
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/* Turn on the display */
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drvdata->reg_ctrl_default = REG_CTRL_ENABLE;
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if (pdata && pdata->rotate_screen)
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if (rotate)
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drvdata->reg_ctrl_default |= REG_CTRL_ROTATE;
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xilinx_fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
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@ -265,31 +258,29 @@ xilinxfb_drv_probe(struct device *dev)
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drvdata->info.fix = xilinx_fb_fix;
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drvdata->info.fix.smem_start = drvdata->fb_phys;
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drvdata->info.pseudo_palette = drvdata->pseudo_palette;
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drvdata->info.flags = FBINFO_DEFAULT;
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drvdata->info.var = xilinx_fb_var;
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if (fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0) < 0) {
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xilinx_fb_var.height = height_mm;
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xilinx_fb_var.width = width_mm;
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/* Allocate a colour map */
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rc = fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0);
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if (rc) {
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dev_err(dev, "Fail to allocate colormap (%d entries)\n",
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PALETTE_ENTRIES_NO);
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retval = -EFAULT;
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goto err_cmap;
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}
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drvdata->info.flags = FBINFO_DEFAULT;
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if (pdata) {
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xilinx_fb_var.height = pdata->screen_height_mm;
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xilinx_fb_var.width = pdata->screen_width_mm;
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}
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drvdata->info.var = xilinx_fb_var;
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/* Register new frame buffer */
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if (register_framebuffer(&drvdata->info) < 0) {
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rc = register_framebuffer(&drvdata->info);
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if (rc) {
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dev_err(dev, "Could not register frame buffer\n");
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retval = -EINVAL;
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goto err_regfb;
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}
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/* Put a banner in the log (for DEBUG) */
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dev_dbg(dev, "regs: phys=%x, virt=%p\n",
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drvdata->regs_phys, drvdata->regs);
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dev_dbg(dev, "regs: phys=%lx, virt=%p\n", physaddr, drvdata->regs);
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dev_dbg(dev, "fb: phys=%p, virt=%p, size=%x\n",
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(void*)drvdata->fb_phys, drvdata->fb_virt, FB_SIZE);
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return 0; /* success */
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@ -300,30 +291,25 @@ err_regfb:
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err_cmap:
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dma_free_coherent(dev, PAGE_ALIGN(FB_SIZE), drvdata->fb_virt,
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drvdata->fb_phys);
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/* Turn off the display */
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xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
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iounmap(drvdata->regs);
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err_fbmem:
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release_mem_region(regs_res->start, 8);
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iounmap(drvdata->regs);
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err_map:
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release_mem_region(physaddr, 8);
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err_region:
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kfree(drvdata);
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dev_set_drvdata(dev, NULL);
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return retval;
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return rc;
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}
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static int
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xilinxfb_drv_remove(struct device *dev)
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static int xilinxfb_release(struct device *dev)
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{
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struct xilinxfb_drvdata *drvdata;
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if (!dev)
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return -ENODEV;
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drvdata = (struct xilinxfb_drvdata *) dev_get_drvdata(dev);
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struct xilinxfb_drvdata *drvdata = dev_get_drvdata(dev);
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#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
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xilinx_fb_blank(VESA_POWERDOWN, &drvdata->info);
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@ -348,6 +334,47 @@ xilinxfb_drv_remove(struct device *dev)
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return 0;
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}
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/* ---------------------------------------------------------------------
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* Platform bus binding
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*/
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static int
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xilinxfb_drv_probe(struct device *dev)
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{
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struct platform_device *pdev;
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struct xilinxfb_platform_data *pdata;
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struct resource *res;
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int width_mm;
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int height_mm;
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int rotate;
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pdev = to_platform_device(dev);
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pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(dev, "Missing pdata structure\n");
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return -ENODEV;
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}
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/* Find the registers address */
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!res) {
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dev_err(dev, "Couldn't get registers resource\n");
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return -ENODEV;
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}
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height_mm = pdata->screen_height_mm;
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width_mm = pdata->screen_width_mm;
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rotate = pdata->rotate_screen ? 1 : 0;
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return xilinxfb_assign(dev, res->start, width_mm, height_mm, rotate);
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}
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static int
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xilinxfb_drv_remove(struct device *dev)
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{
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return xilinxfb_release(dev);
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}
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static struct device_driver xilinxfb_driver = {
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.name = DRIVER_NAME,
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