[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 2007-10-04 10:48:37 -06:00
parent 3fb99ce4e2
commit 264776224d

View File

@ -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;
if (fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0) < 0) {
xilinx_fb_var.height = height_mm;
xilinx_fb_var.width = width_mm;
/* 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 @@ xilinxfb_drv_probe(struct device *dev)
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,