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path: root/drivers/video/xilinxfb.c
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Diffstat (limited to 'drivers/video/xilinxfb.c')
-rw-r--r--drivers/video/xilinxfb.c137
1 files changed, 68 insertions, 69 deletions
diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index af0b4fdf9aa9..6629b29a8202 100644
--- a/drivers/video/xilinxfb.c
+++ b/drivers/video/xilinxfb.c
@@ -44,7 +44,7 @@
/*
- * Xilinx calls it "PLB TFT LCD Controller" though it can also be used for
+ * Xilinx calls it "TFT LCD Controller" though it can also be used for
* the VGA port on the Xilinx ML40x board. This is a hardware display
* controller for a 640x480 resolution TFT or VGA screen.
*
@@ -54,11 +54,11 @@
* don't start thinking about scrolling). The second allows the LCD to
* be turned on or off as well as rotated 180 degrees.
*
- * In case of direct PLB access the second control register will be at
+ * In case of direct BUS access the second control register will be at
* an offset of 4 as compared to the DCR access where the offset is 1
* i.e. REG_CTRL. So this is taken care in the function
- * xilinx_fb_out_be32 where it left shifts the offset 2 times in case of
- * direct PLB access.
+ * xilinx_fb_out32 where it left shifts the offset 2 times in case of
+ * direct BUS access.
*/
#define NUM_REGS 2
#define REG_FB_ADDR 0
@@ -116,7 +116,8 @@ static struct fb_var_screeninfo xilinx_fb_var = {
};
-#define PLB_ACCESS_FLAG 0x1 /* 1 = PLB, 0 = DCR */
+#define BUS_ACCESS_FLAG 0x1 /* 1 = BUS, 0 = DCR */
+#define LITTLE_ENDIAN_ACCESS 0x2 /* LITTLE ENDIAN IO functions */
struct xilinxfb_drvdata {
@@ -146,21 +147,40 @@ struct xilinxfb_drvdata {
container_of(_info, struct xilinxfb_drvdata, info)
/*
- * The XPS TFT Controller can be accessed through PLB or DCR interface.
+ * The XPS TFT Controller can be accessed through BUS or DCR interface.
* To perform the read/write on the registers we need to check on
* which bus its connected and call the appropriate write API.
*/
-static void xilinx_fb_out_be32(struct xilinxfb_drvdata *drvdata, u32 offset,
+static void xilinx_fb_out32(struct xilinxfb_drvdata *drvdata, u32 offset,
u32 val)
{
- if (drvdata->flags & PLB_ACCESS_FLAG)
- out_be32(drvdata->regs + (offset << 2), val);
+ if (drvdata->flags & BUS_ACCESS_FLAG) {
+ if (drvdata->flags & LITTLE_ENDIAN_ACCESS)
+ iowrite32(val, drvdata->regs + (offset << 2));
+ else
+ iowrite32be(val, drvdata->regs + (offset << 2));
+ }
#ifdef CONFIG_PPC_DCR
else
dcr_write(drvdata->dcr_host, offset, val);
#endif
}
+static u32 xilinx_fb_in32(struct xilinxfb_drvdata *drvdata, u32 offset)
+{
+ if (drvdata->flags & BUS_ACCESS_FLAG) {
+ if (drvdata->flags & LITTLE_ENDIAN_ACCESS)
+ return ioread32(drvdata->regs + (offset << 2));
+ else
+ return ioread32be(drvdata->regs + (offset << 2));
+ }
+#ifdef CONFIG_PPC_DCR
+ else
+ return dcr_read(drvdata->dcr_host, offset);
+#endif
+ return 0;
+}
+
static int
xilinx_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *fbi)
@@ -197,7 +217,7 @@ xilinx_fb_blank(int blank_mode, struct fb_info *fbi)
switch (blank_mode) {
case FB_BLANK_UNBLANK:
/* turn on panel */
- xilinx_fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
+ xilinx_fb_out32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
break;
case FB_BLANK_NORMAL:
@@ -205,7 +225,7 @@ xilinx_fb_blank(int blank_mode, struct fb_info *fbi)
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_POWERDOWN:
/* turn off panel */
- xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
+ xilinx_fb_out32(drvdata, REG_CTRL, 0);
default:
break;
@@ -227,33 +247,23 @@ static struct fb_ops xilinxfb_ops =
* Bus independent setup/teardown
*/
-static int xilinxfb_assign(struct device *dev,
+static int xilinxfb_assign(struct platform_device *pdev,
struct xilinxfb_drvdata *drvdata,
- unsigned long physaddr,
struct xilinxfb_platform_data *pdata)
{
int rc;
+ struct device *dev = &pdev->dev;
int fbsize = pdata->xvirt * pdata->yvirt * BYTES_PER_PIXEL;
- if (drvdata->flags & PLB_ACCESS_FLAG) {
- /*
- * Map the control registers in if the controller
- * is on direct PLB interface.
- */
- 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 (drvdata->flags & BUS_ACCESS_FLAG) {
+ struct resource *res;
- drvdata->regs_phys = physaddr;
- drvdata->regs = ioremap(physaddr, 8);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ drvdata->regs_phys = res->start;
+ drvdata->regs = devm_request_and_ioremap(&pdev->dev, res);
if (!drvdata->regs) {
- dev_err(dev, "Couldn't lock memory region at 0x%08lX\n",
- physaddr);
- rc = -ENODEV;
- goto err_map;
+ rc = -EADDRNOTAVAIL;
+ goto err_region;
}
}
@@ -270,7 +280,7 @@ static int xilinxfb_assign(struct device *dev,
if (!drvdata->fb_virt) {
dev_err(dev, "Could not allocate frame buffer memory\n");
rc = -ENOMEM;
- if (drvdata->flags & PLB_ACCESS_FLAG)
+ if (drvdata->flags & BUS_ACCESS_FLAG)
goto err_fbmem;
else
goto err_region;
@@ -280,13 +290,19 @@ static int xilinxfb_assign(struct device *dev,
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);
+ xilinx_fb_out32(drvdata, REG_FB_ADDR, drvdata->fb_phys);
+ rc = xilinx_fb_in32(drvdata, REG_FB_ADDR);
+ /* Endianess detection */
+ if (rc != drvdata->fb_phys) {
+ drvdata->flags |= LITTLE_ENDIAN_ACCESS;
+ xilinx_fb_out32(drvdata, REG_FB_ADDR, drvdata->fb_phys);
+ }
/* Turn on the display */
drvdata->reg_ctrl_default = REG_CTRL_ENABLE;
if (pdata->rotate_screen)
drvdata->reg_ctrl_default |= REG_CTRL_ROTATE;
- xilinx_fb_out_be32(drvdata, REG_CTRL,
+ xilinx_fb_out32(drvdata, REG_CTRL,
drvdata->reg_ctrl_default);
/* Fill struct fb_info */
@@ -323,10 +339,10 @@ static int xilinxfb_assign(struct device *dev,
goto err_regfb;
}
- if (drvdata->flags & PLB_ACCESS_FLAG) {
+ if (drvdata->flags & BUS_ACCESS_FLAG) {
/* Put a banner in the log (for DEBUG) */
- dev_dbg(dev, "regs: phys=%lx, virt=%p\n", physaddr,
- drvdata->regs);
+ dev_dbg(dev, "regs: phys=%pa, virt=%p\n",
+ &drvdata->regs_phys, drvdata->regs);
}
/* Put a banner in the log (for DEBUG) */
dev_dbg(dev, "fb: phys=%llx, virt=%p, size=%x\n",
@@ -345,15 +361,11 @@ err_cmap:
iounmap(drvdata->fb_virt);
/* Turn off the display */
- xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
+ xilinx_fb_out32(drvdata, REG_CTRL, 0);
err_fbmem:
- if (drvdata->flags & PLB_ACCESS_FLAG)
- iounmap(drvdata->regs);
-
-err_map:
- if (drvdata->flags & PLB_ACCESS_FLAG)
- release_mem_region(physaddr, 8);
+ if (drvdata->flags & BUS_ACCESS_FLAG)
+ devm_iounmap(dev, drvdata->regs);
err_region:
kfree(drvdata);
@@ -381,13 +393,11 @@ static int xilinxfb_release(struct device *dev)
iounmap(drvdata->fb_virt);
/* Turn off the display */
- xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
+ xilinx_fb_out32(drvdata, REG_CTRL, 0);
/* Release the resources, as allocated based on interface */
- if (drvdata->flags & PLB_ACCESS_FLAG) {
- iounmap(drvdata->regs);
- release_mem_region(drvdata->regs_phys, 8);
- }
+ if (drvdata->flags & BUS_ACCESS_FLAG)
+ devm_iounmap(dev, drvdata->regs);
#ifdef CONFIG_PPC_DCR
else
dcr_unmap(drvdata->dcr_host, drvdata->dcr_len);
@@ -406,11 +416,9 @@ static int xilinxfb_release(struct device *dev)
static int xilinxfb_of_probe(struct platform_device *op)
{
const u32 *prop;
- u32 *p;
- u32 tft_access;
+ u32 tft_access = 0;
struct xilinxfb_platform_data pdata;
- struct resource res;
- int size, rc;
+ int size;
struct xilinxfb_drvdata *drvdata;
/* Copy with the default pdata (not a ptr reference!) */
@@ -424,34 +432,29 @@ static int xilinxfb_of_probe(struct platform_device *op)
}
/*
- * To check whether the core is connected directly to DCR or PLB
+ * To check whether the core is connected directly to DCR or BUS
* interface and initialize the tft_access accordingly.
*/
- p = (u32 *)of_get_property(op->dev.of_node, "xlnx,dcr-splb-slave-if", NULL);
- tft_access = p ? *p : 0;
+ of_property_read_u32(op->dev.of_node, "xlnx,dcr-splb-slave-if",
+ &tft_access);
/*
- * Fill the resource structure if its direct PLB interface
+ * Fill the resource structure if its direct BUS interface
* otherwise fill the dcr_host structure.
*/
if (tft_access) {
- drvdata->flags |= PLB_ACCESS_FLAG;
- rc = of_address_to_resource(op->dev.of_node, 0, &res);
- if (rc) {
- dev_err(&op->dev, "invalid address\n");
- goto err;
- }
+ drvdata->flags |= BUS_ACCESS_FLAG;
}
#ifdef CONFIG_PPC_DCR
else {
int start;
- res.start = 0;
start = dcr_resource_start(op->dev.of_node, 0);
drvdata->dcr_len = dcr_resource_len(op->dev.of_node, 0);
drvdata->dcr_host = dcr_map(op->dev.of_node, start, drvdata->dcr_len);
if (!DCR_MAP_OK(drvdata->dcr_host)) {
dev_err(&op->dev, "invalid DCR address\n");
- goto err;
+ kfree(drvdata);
+ return -ENODEV;
}
}
#endif
@@ -478,11 +481,7 @@ static int xilinxfb_of_probe(struct platform_device *op)
pdata.rotate_screen = 1;
dev_set_drvdata(&op->dev, drvdata);
- return xilinxfb_assign(&op->dev, drvdata, res.start, &pdata);
-
- err:
- kfree(drvdata);
- return -ENODEV;
+ return xilinxfb_assign(op, drvdata, &pdata);
}
static int xilinxfb_of_remove(struct platform_device *op)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 14:29:04 +0300