FB/S3C2412: add S3C2412 support to S3C2410 fb driver

Add support for the S3C2412 to the S3C2410 frame buffer driver
by ensuring that any moved registers can be dealt with.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Vincent Sanders <vince@simtec.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 80 insertions, 16 deletions

diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c
index b3c31d9dc591..628b9e67f0ca 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -110,6 +110,11 @@ static int debug	= 0;
 
 /* useful functions */
 
+static int is_s3c2412(struct s3c2410fb_info *fbi)
+{
+        return (fbi->drv_type == DRV_S3C2412);
+}
+
 /* s3c2410fb_set_lcdaddr
  *
  * initialise lcd controller address pointers
@@ -501,7 +506,7 @@ static void schedule_palette_update(struct s3c2410fb_info *fbi,
 {
         unsigned long flags;
         unsigned long irqen;
-        void __iomem *regs = fbi->io;
+        void __iomem *irq_base = fbi->irq_base;
 
         local_irq_save(flags);
 
@@ -511,9 +516,9 @@ static void schedule_palette_update(struct s3c2410fb_info *fbi,
                 fbi->palette_ready = 1;
 
                 /* enable IRQ */
-                irqen = readl(regs + S3C2410_LCDINTMSK);
+                irqen = readl(irq_base + S3C24XX_LCDINTMSK);
                 irqen &= ~S3C2410_LCDINT_FRSYNC;
-                writel(irqen, regs + S3C2410_LCDINTMSK);
+                writel(irqen, irq_base + S3C24XX_LCDINTMSK);
         }
 
         local_irq_restore(flags);
@@ -594,15 +599,17 @@ static int s3c2410fb_setcolreg(unsigned regno,
 static int s3c2410fb_blank(int blank_mode, struct fb_info *info)
 {
         struct s3c2410fb_info *fbi = info->par;
-        void __iomem *regs = fbi->io;
+        void __iomem *tpal_reg = fbi->io;
 
         dprintk("blank(mode=%d, info=%p)\n", blank_mode, info);
 
+        tpal_reg += is_s3c2412(fbi) ? S3C2412_TPAL : S3C2410_TPAL;
+
         if (blank_mode == FB_BLANK_UNBLANK)
-                writel(0x0, regs + S3C2410_TPAL);
+                writel(0x0, tpal_reg);
         else {
                 dprintk("setting TPAL to output 0x000000\n");
-                writel(S3C2410_TPAL_EN, regs + S3C2410_TPAL);
+                writel(S3C2410_TPAL_EN, tpal_reg);
         }
 
         return 0;
@@ -709,6 +716,16 @@ static int s3c2410fb_init_registers(struct fb_info *info)
         struct s3c2410fb_mach_info *mach_info = fbi->dev->platform_data;
         unsigned long flags;
         void __iomem *regs = fbi->io;
+        void __iomem *tpal;
+        void __iomem *lpcsel;
+
+        if (is_s3c2412(fbi)) {
+                tpal = regs + S3C2412_TPAL;
+                lpcsel = regs + S3C2412_TCONSEL;
+        } else {
+                tpal = regs + S3C2410_TPAL;
+                lpcsel = regs + S3C2410_LPCSEL;
+        }
 
         /* Initialise LCD with values from haret */
 
@@ -724,12 +741,12 @@ static int s3c2410fb_init_registers(struct fb_info *info)
         local_irq_restore(flags);
 
         dprintk("LPCSEL    = 0x%08lx\n", mach_info->lpcsel);
-        writel(mach_info->lpcsel, regs + S3C2410_LPCSEL);
+        writel(mach_info->lpcsel, lpcsel);
 
-        dprintk("replacing TPAL %08x\n", readl(regs + S3C2410_TPAL));
+        dprintk("replacing TPAL %08x\n", readl(tpal));
 
         /* ensure temporary palette disabled */
-        writel(0x00, regs + S3C2410_TPAL);
+        writel(0x00, tpal);
 
         return 0;
 }
@@ -763,15 +780,15 @@ static void s3c2410fb_write_palette(struct s3c2410fb_info *fbi)
 static irqreturn_t s3c2410fb_irq(int irq, void *dev_id)
 {
         struct s3c2410fb_info *fbi = dev_id;
-        void __iomem *regs = fbi->io;
-        unsigned long lcdirq = readl(regs + S3C2410_LCDINTPND);
+        void __iomem *irq_base = fbi->irq_base;
+        unsigned long lcdirq = readl(irq_base + S3C24XX_LCDINTPND);
 
         if (lcdirq & S3C2410_LCDINT_FRSYNC) {
                 if (fbi->palette_ready)
                         s3c2410fb_write_palette(fbi);
 
-                writel(S3C2410_LCDINT_FRSYNC, regs + S3C2410_LCDINTPND);
-                writel(S3C2410_LCDINT_FRSYNC, regs + S3C2410_LCDSRCPND);
+                writel(S3C2410_LCDINT_FRSYNC, irq_base + S3C24XX_LCDINTPND);
+                writel(S3C2410_LCDINT_FRSYNC, irq_base + S3C24XX_LCDSRCPND);
         }
 
         return IRQ_HANDLED;
@@ -779,7 +796,8 @@ static irqreturn_t s3c2410fb_irq(int irq, void *dev_id)
 
 static char driver_name[] = "s3c2410fb";
 
-static int __init s3c2410fb_probe(struct platform_device *pdev)
+static int __init s3c24xxfb_probe(struct platform_device *pdev,
+                                  enum s3c_drv_type drv_type)
 {
         struct s3c2410fb_info *info;
         struct s3c2410fb_display *display;
@@ -815,6 +833,7 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
 
         info = fbinfo->par;
         info->dev = &pdev->dev;
+        info->drv_type = drv_type;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (res == NULL) {
@@ -838,6 +857,8 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
                 goto release_mem;
         }
 
+        info->irq_base = info->io + ((drv_type == DRV_S3C2412) ? S3C2412_LCDINTBASE : S3C2410_LCDINTBASE);
+
         dprintk("devinit\n");
 
         strcpy(fbinfo->fix.id, driver_name);
@@ -946,6 +967,16 @@ dealloc_fb:
         return ret;
 }
 
+static int __init s3c2410fb_probe(struct platform_device *pdev)
+{
+        return s3c24xxfb_probe(pdev, DRV_S3C2410);
+}
+
+static int __init s3c2412fb_probe(struct platform_device *pdev)
+{
+        return s3c24xxfb_probe(pdev, DRV_S3C2412);
+}
+
 /* s3c2410fb_stop_lcd
  *
  * shutdown the lcd controller
@@ -1047,14 +1078,31 @@ static struct platform_driver s3c2410fb_driver = {
         },
 };
 
+static struct platform_driver s3c2412fb_driver = {
+        .probe          = s3c2412fb_probe,
+        .remove         = s3c2410fb_remove,
+        .suspend        = s3c2410fb_suspend,
+        .resume         = s3c2410fb_resume,
+        .driver         = {
+                .name   = "s3c2412-lcd",
+                .owner  = THIS_MODULE,
+        },
+};
+
 int __init s3c2410fb_init(void)
 {
-        return platform_driver_register(&s3c2410fb_driver);
+        int ret = platform_driver_register(&s3c2410fb_driver);
+
+        if (ret == 0)
+                ret = platform_driver_register(&s3c2412fb_driver);;
+
+        return ret;
 }
 
 static void __exit s3c2410fb_cleanup(void)
 {
         platform_driver_unregister(&s3c2410fb_driver);
+        platform_driver_unregister(&s3c2412fb_driver);
 }
 
 module_init(s3c2410fb_init);
diff --git a/drivers/video/s3c2410fb.h b/drivers/video/s3c2410fb.h
index 6ce5dc26c5f7..dbb73b95e2ef 100644
--- a/drivers/video/s3c2410fb.h
+++ b/drivers/video/s3c2410fb.h
@@ -25,13 +25,20 @@
 #ifndef __S3C2410FB_H
 #define __S3C2410FB_H
 
+enum s3c_drv_type {
+        DRV_S3C2410,
+        DRV_S3C2412,
+};
+
 struct s3c2410fb_info {
         struct device           *dev;
         struct clk              *clk;
 
         struct resource         *mem;
         void __iomem            *io;
+        void __iomem            *irq_base;
 
+        enum s3c_drv_type       drv_type;
         struct s3c2410fb_hw     regs;
 
         unsigned int            palette_ready;
diff --git a/include/asm-arm/arch-s3c2410/regs-lcd.h b/include/asm-arm/arch-s3c2410/regs-lcd.h
index 76fe5f693426..bd854845697f 100644
--- a/include/asm-arm/arch-s3c2410/regs-lcd.h
+++ b/include/asm-arm/arch-s3c2410/regs-lcd.h
@@ -147,7 +147,16 @@
 
 #define S3C2412_FRCPAT(x)       S3C2410_LCDREG(0xB4 + ((x)*4))
 
-#endif /* ___ASM_ARCH_REGS_LCD_H */
+/* general registers */
+
+/* base of the LCD registers, where INTPND, INTSRC and then INTMSK
+ * are available. */
 
+#define S3C2410_LCDINTBASE      S3C2410_LCDREG(0x54)
+#define S3C2412_LCDINTBASE      S3C2410_LCDREG(0x24)
 
+#define S3C24XX_LCDINTPND       (0x00)
+#define S3C24XX_LCDSRCPND       (0x04)
+#define S3C24XX_LCDINTMSK       (0x08)
 
+#endif /* ___ASM_ARCH_REGS_LCD_H */