* 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.
*/
/*
* Geert Uytterhoeven.
*/
+#include <linux/device.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#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 <syslib/virtex_devices.h>
+#include <linux/xilinxfb.h>
#define DRIVER_NAME "xilinxfb"
#define DRIVER_DESCRIPTION "Xilinx TFT LCD frame buffer driver"
*/
#define BYTES_PER_PIXEL 4
#define BITS_PER_PIXEL (BYTES_PER_PIXEL * 8)
-#define XRES 640
-#define YRES 480
-#define XRES_VIRTUAL 1024
-#define YRES_VIRTUAL YRES
-#define LINE_LENGTH (XRES_VIRTUAL * BYTES_PER_PIXEL)
-#define FB_SIZE (YRES_VIRTUAL * LINE_LENGTH)
#define RED_SHIFT 16
#define GREEN_SHIFT 8
#define PALETTE_ENTRIES_NO 16 /* passed to fb_alloc_cmap() */
+/*
+ * Default xilinxfb configuration
+ */
+static struct xilinxfb_platform_data xilinx_fb_default_pdata = {
+ .xres = 640,
+ .yres = 480,
+ .xvirt = 1024,
+ .yvirt = 480,
+};
+
/*
* Here are the default fb_fix_screeninfo and fb_var_screeninfo structures
*/
.id = "Xilinx",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
- .smem_len = FB_SIZE,
- .line_length = LINE_LENGTH,
.accel = FB_ACCEL_NONE
};
static struct fb_var_screeninfo xilinx_fb_var = {
- .xres = XRES,
- .yres = YRES,
- .xres_virtual = XRES_VIRTUAL,
- .yres_virtual = YRES_VIRTUAL,
-
.bits_per_pixel = BITS_PER_PIXEL,
.red = { RED_SHIFT, 8, 0 },
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 */
+ int fb_alloced; /* Flag, was the fb memory alloced? */
u32 reg_ctrl_default;
.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,
+ struct xilinxfb_platform_data *pdata)
{
- 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;
+ int fbsize = pdata->xvirt * pdata->yvirt * BYTES_PER_PIXEL;
+ /* 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 (pdata->fb_phys) {
+ drvdata->fb_phys = pdata->fb_phys;
+ drvdata->fb_virt = ioremap(pdata->fb_phys, fbsize);
+ } else {
+ drvdata->fb_alloced = 1;
+ drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(fbsize),
+ &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, fbsize);
/* 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 (pdata->rotate_screen)
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;
-
- if (fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0) < 0) {
- printk(KERN_ERR "Fail to allocate colormap (%d entries)\n",
- PALETTE_ENTRIES_NO);
- retval = -EFAULT;
- goto failed3;
- }
+ drvdata->info.fix.smem_len = fbsize;
+ drvdata->info.fix.line_length = pdata->xvirt * BYTES_PER_PIXEL;
+ drvdata->info.pseudo_palette = drvdata->pseudo_palette;
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;
+ drvdata->info.var.height = pdata->screen_height_mm;
+ drvdata->info.var.width = pdata->screen_width_mm;
+ drvdata->info.var.xres = pdata->xres;
+ drvdata->info.var.yres = pdata->yres;
+ drvdata->info.var.xres_virtual = pdata->xvirt;
+ drvdata->info.var.yres_virtual = pdata->yvirt;
+
+ /* 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);
+ goto err_cmap;
+ }
/* 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, fbsize);
+
return 0; /* success */
-failed4:
+err_regfb:
fb_dealloc_cmap(&drvdata->info.cmap);
-failed3:
- dma_free_coherent(dev, PAGE_ALIGN(FB_SIZE), drvdata->fb_virt,
- drvdata->fb_phys);
-
+err_cmap:
+ if (drvdata->fb_alloced)
+ dma_free_coherent(dev, PAGE_ALIGN(fbsize), 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);
fb_dealloc_cmap(&drvdata->info.cmap);
- dma_free_coherent(dev, PAGE_ALIGN(FB_SIZE), drvdata->fb_virt,
- drvdata->fb_phys);
+ if (drvdata->fb_alloced)
+ dma_free_coherent(dev, PAGE_ALIGN(drvdata->info.fix.smem_len),
+ drvdata->fb_virt, drvdata->fb_phys);
/* Turn off the display */
xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
return 0;
}
+/* ---------------------------------------------------------------------
+ * Platform bus binding
+ */
+
+static int
+xilinxfb_platform_probe(struct platform_device *pdev)
+{
+ struct xilinxfb_platform_data *pdata;
+ struct resource *res;
-static struct device_driver xilinxfb_driver = {
- .name = DRIVER_NAME,
- .bus = &platform_bus_type,
+ /* 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;
+ }
- .probe = xilinxfb_drv_probe,
- .remove = xilinxfb_drv_remove
+ /* If a pdata structure is provided, then extract the parameters */
+ pdata = &xilinx_fb_default_pdata;
+ if (pdev->dev.platform_data) {
+ pdata = pdev->dev.platform_data;
+ if (!pdata->xres)
+ pdata->xres = xilinx_fb_default_pdata.xres;
+ if (!pdata->yres)
+ pdata->yres = xilinx_fb_default_pdata.yres;
+ if (!pdata->xvirt)
+ pdata->xvirt = xilinx_fb_default_pdata.xvirt;
+ if (!pdata->yvirt)
+ pdata->yvirt = xilinx_fb_default_pdata.yvirt;
+ }
+
+ return xilinxfb_assign(&pdev->dev, res->start, pdata);
+}
+
+static int
+xilinxfb_platform_remove(struct platform_device *pdev)
+{
+ return xilinxfb_release(&pdev->dev);
+}
+
+
+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;
+ struct xilinxfb_platform_data pdata;
+ int size, rc;
+
+ /* Copy with the default pdata (not a ptr reference!) */
+ pdata = xilinx_fb_default_pdata;
+
+ 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, "phys-size", &size);
+ if ((prop) && (size >= sizeof(u32)*2)) {
+ pdata.screen_width_mm = prop[0];
+ pdata.screen_height_mm = prop[1];
+ }
+
+ prop = of_get_property(op->node, "resolution", &size);
+ if ((prop) && (size >= sizeof(u32)*2)) {
+ pdata.xres = prop[0];
+ pdata.yres = prop[1];
+ }
+
+ prop = of_get_property(op->node, "virtual-resolution", &size);
+ if ((prop) && (size >= sizeof(u32)*2)) {
+ pdata.xvirt = prop[0];
+ pdata.yvirt = prop[1];
+ }
+
+ if (of_find_property(op->node, "rotate-display", NULL))
+ pdata.rotate_screen = 1;
+
+ return xilinxfb_assign(&op->dev, res.start, &pdata);
+}
+
+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 xilinxfb_of_match[] __devinitdata = {
+ { .compatible = "xlnx,plb-tft-cntlr-ref-1.00.a", },
+ {},
};
+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);
git.openpandora.org / pandora-kernel.git / blobdiff