[PATCH] vga16fb: Convert vga16fb as a platform device

- Convert vga16fb as a platform device

- use framebuffer_alloc() to dynamically allocate resources, and
  framebuffer_release() to free

- remove unneeded casts

- trivial whitespace changes

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 110 insertions, 59 deletions

diff --git a/drivers/video/vga16fb.c b/drivers/video/vga16fb.c
index 690bb6fe8281..226ae8a88482 100644
--- a/drivers/video/vga16fb.c
+++ b/drivers/video/vga16fb.c
@@ -21,6 +21,7 @@
 #include <linux/fb.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
+#include <linux/platform_device.h>
 
 #include <asm/io.h>
 #include <video/vga.h>
@@ -51,35 +52,33 @@
  * card parameters
  */
 
-static struct fb_info vga16fb; 
-
-static struct vga16fb_par {
+struct vga16fb_par {
         /* structure holding original VGA register settings when the
            screen is blanked */
         struct {
-                unsigned char   SeqCtrlIndex;           /* Sequencer Index reg.   */
-                unsigned char   CrtCtrlIndex;           /* CRT-Contr. Index reg.  */
-                unsigned char   CrtMiscIO;              /* Miscellaneous register */
-                unsigned char   HorizontalTotal;        /* CRT-Controller:00h */
-                unsigned char   HorizDisplayEnd;        /* CRT-Controller:01h */
-                unsigned char   StartHorizRetrace;      /* CRT-Controller:04h */
-                unsigned char   EndHorizRetrace;        /* CRT-Controller:05h */
-                unsigned char   Overflow;               /* CRT-Controller:07h */
-                unsigned char   StartVertRetrace;       /* CRT-Controller:10h */
-                unsigned char   EndVertRetrace;         /* CRT-Controller:11h */
-                unsigned char   ModeControl;            /* CRT-Controller:17h */
-                unsigned char   ClockingMode;           /* Seq-Controller:01h */
+                unsigned char   SeqCtrlIndex;     /* Sequencer Index reg.   */
+                unsigned char   CrtCtrlIndex;     /* CRT-Contr. Index reg.  */
+                unsigned char   CrtMiscIO;        /* Miscellaneous register */
+                unsigned char   HorizontalTotal;  /* CRT-Controller:00h */
+                unsigned char   HorizDisplayEnd;  /* CRT-Controller:01h */
+                unsigned char   StartHorizRetrace;/* CRT-Controller:04h */
+                unsigned char   EndHorizRetrace;  /* CRT-Controller:05h */
+                unsigned char   Overflow;         /* CRT-Controller:07h */
+                unsigned char   StartVertRetrace; /* CRT-Controller:10h */
+                unsigned char   EndVertRetrace;   /* CRT-Controller:11h */
+                unsigned char   ModeControl;      /* CRT-Controller:17h */
+                unsigned char   ClockingMode;     /* Seq-Controller:01h */
         } vga_state;
         struct vgastate state;
         atomic_t ref_count;
         int palette_blanked, vesa_blanked, mode, isVGA;
         u8 misc, pel_msk, vss, clkdiv;
         u8 crtc[VGA_CRT_C];
-} vga16_par;
+};
 
 /* --------------------------------------------------------------------- */
 
-static struct fb_var_screeninfo vga16fb_defined = {
+static struct fb_var_screeninfo vga16fb_defined __initdata = {
         .xres           = 640,
         .yres           = 480,
         .xres_virtual   = 640,
@@ -205,7 +204,7 @@ static inline void setindex(int index)
 static void vga16fb_pan_var(struct fb_info *info, 
                             struct fb_var_screeninfo *var)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         u32 xoffset, pos;
 
         xoffset = var->xoffset;
@@ -300,7 +299,7 @@ static void vga16fb_clock_chip(struct vga16fb_par *par,
 
 static int vga16fb_open(struct fb_info *info, int user)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         int cnt = atomic_read(&par->ref_count);
 
         if (!cnt) {
@@ -315,7 +314,7 @@ static int vga16fb_open(struct fb_info *info, int user)
 
 static int vga16fb_release(struct fb_info *info, int user)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         int cnt = atomic_read(&par->ref_count);
 
         if (!cnt)
@@ -330,7 +329,7 @@ static int vga16fb_release(struct fb_info *info, int user)
 static int vga16fb_check_var(struct fb_var_screeninfo *var,
                              struct fb_info *info)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         u32 xres, right, hslen, left, xtotal;
         u32 yres, lower, vslen, upper, ytotal;
         u32 vxres, xoffset, vyres, yoffset;
@@ -535,7 +534,7 @@ static int vga16fb_check_var(struct fb_var_screeninfo *var,
 
 static int vga16fb_set_par(struct fb_info *info)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         u8 gdc[VGA_GFX_C];
         u8 seq[VGA_SEQ_C];
         u8 atc[VGA_ATT_C];
@@ -677,7 +676,7 @@ static int vga16fb_setcolreg(unsigned regno, unsigned red, unsigned green,
                              unsigned blue, unsigned transp,
                              struct fb_info *info)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         int gray;
 
         /*
@@ -850,7 +849,7 @@ static void vga_pal_blank(void)
 /* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
 static int vga16fb_blank(int blank, struct fb_info *info)
 {
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
 
         switch (blank) {
         case FB_BLANK_UNBLANK:                          /* Unblank */
@@ -1201,7 +1200,7 @@ static void vga_imageblit_expand(struct fb_info *info, const struct fb_image *im
 {
         char __iomem *where = info->screen_base + (image->dx/8) +
                 image->dy * info->fix.line_length;
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         char *cdat = (char *) image->data;
         char __iomem *dst;
         int x, y;
@@ -1266,7 +1265,7 @@ static void vga_imageblit_color(struct fb_info *info, const struct fb_image *ima
         /*
          * Draw logo 
          */
-        struct vga16fb_par *par = (struct vga16fb_par *) info->par;
+        struct vga16fb_par *par = info->par;
         char __iomem *where =
                 info->screen_base + image->dy * info->fix.line_length +
                 image->dx/8;
@@ -1343,89 +1342,141 @@ static int vga16fb_setup(char *options)
 }
 #endif
 
-static int __init vga16fb_init(void)
+static int __init vga16fb_probe(struct device *device)
 {
+        struct platform_device *dev = to_platform_device(device);
+        struct fb_info *info;
+        struct vga16fb_par *par;
         int i;
-        int ret;
-#ifndef MODULE
-        char *option = NULL;
+        int ret = 0;
 
-        if (fb_get_options("vga16fb", &option))
-                return -ENODEV;
-
-        vga16fb_setup(option);
-#endif
         printk(KERN_DEBUG "vga16fb: initializing\n");
+        info = framebuffer_alloc(sizeof(struct vga16fb_par), &dev->dev);
+
+        if (!info) {
+                ret = -ENOMEM;
+                goto err_fb_alloc;
+        }
 
         /* XXX share VGA_FB_PHYS and I/O region with vgacon and others */
+        info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS);
 
-        vga16fb.screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS);
-        if (!vga16fb.screen_base) {
+        if (!info->screen_base) {
                 printk(KERN_ERR "vga16fb: unable to map device\n");
                 ret = -ENOMEM;
                 goto err_ioremap;
         }
-        printk(KERN_INFO "vga16fb: mapped to 0x%p\n", vga16fb.screen_base);
 
-        vga16_par.isVGA = ORIG_VIDEO_ISVGA;
-        vga16_par.palette_blanked = 0;
-        vga16_par.vesa_blanked = 0;
+        printk(KERN_INFO "vga16fb: mapped to 0x%p\n", info->screen_base);
+        par = info->par;
 
-        i = vga16_par.isVGA? 6 : 2;
+        par->isVGA = ORIG_VIDEO_ISVGA;
+        par->palette_blanked = 0;
+        par->vesa_blanked = 0;
+
+        i = par->isVGA? 6 : 2;
         
         vga16fb_defined.red.length   = i;
         vga16fb_defined.green.length = i;
         vga16fb_defined.blue.length  = i;       
 
         /* name should not depend on EGA/VGA */
-        vga16fb.fbops = &vga16fb_ops;
-        vga16fb.var = vga16fb_defined;
-        vga16fb.fix = vga16fb_fix;
-        vga16fb.par = &vga16_par;
-        vga16fb.flags = FBINFO_FLAG_DEFAULT |
+        info->fbops = &vga16fb_ops;
+        info->var = vga16fb_defined;
+        info->fix = vga16fb_fix;
+        info->flags = FBINFO_FLAG_DEFAULT |
                 FBINFO_HWACCEL_YPAN;
 
-        i = (vga16fb_defined.bits_per_pixel == 8) ? 256 : 16;
-        ret = fb_alloc_cmap(&vga16fb.cmap, i, 0);
+        i = (info->var.bits_per_pixel == 8) ? 256 : 16;
+        ret = fb_alloc_cmap(&info->cmap, i, 0);
         if (ret) {
                 printk(KERN_ERR "vga16fb: unable to allocate colormap\n");
                 ret = -ENOMEM;
                 goto err_alloc_cmap;
         }
 
-        if (vga16fb_check_var(&vga16fb.var, &vga16fb)) {
+        if (vga16fb_check_var(&info->var, info)) {
                 printk(KERN_ERR "vga16fb: unable to validate variable\n");
                 ret = -EINVAL;
                 goto err_check_var;
         }
 
-        vga16fb_update_fix(&vga16fb);
+        vga16fb_update_fix(info);
 
-        if (register_framebuffer(&vga16fb) < 0) {
+        if (register_framebuffer(info) < 0) {
                 printk(KERN_ERR "vga16fb: unable to register framebuffer\n");
                 ret = -EINVAL;
                 goto err_check_var;
         }
 
         printk(KERN_INFO "fb%d: %s frame buffer device\n",
-               vga16fb.node, vga16fb.fix.id);
+               info->node, info->fix.id);
+        dev_set_drvdata(device, info);
 
         return 0;
 
  err_check_var:
-        fb_dealloc_cmap(&vga16fb.cmap);
+        fb_dealloc_cmap(&info->cmap);
  err_alloc_cmap:
-        iounmap(vga16fb.screen_base);
+        iounmap(info->screen_base);
  err_ioremap:
+        framebuffer_release(info);
+ err_fb_alloc:
+        return ret;
+}
+
+static int vga16fb_remove(struct device *device)
+{
+        struct fb_info *info = dev_get_drvdata(device);
+
+        if (info) {
+                unregister_framebuffer(info);
+                iounmap(info->screen_base);
+                fb_dealloc_cmap(&info->cmap);
+        /* XXX unshare VGA regions */
+                framebuffer_release(info);
+        }
+
+        return 0;
+}
+
+static struct device_driver vga16fb_driver = {
+        .name = "vga16fb",
+        .bus  = &platform_bus_type,
+        .probe = vga16fb_probe,
+        .remove = vga16fb_remove,
+};
+
+static struct platform_device vga16fb_device = {
+        .name = "vga16fb",
+};
+
+static int __init vga16fb_init(void)
+{
+        int ret;
+#ifndef MODULE
+        char *option = NULL;
+
+        if (fb_get_options("vga16fb", &option))
+                return -ENODEV;
+
+        vga16fb_setup(option);
+#endif
+        ret = driver_register(&vga16fb_driver);
+
+        if (!ret) {
+                ret = platform_device_register(&vga16fb_device);
+                if (ret)
+                        driver_unregister(&vga16fb_driver);
+        }
+
         return ret;
 }
 
 static void __exit vga16fb_exit(void)
 {
-    unregister_framebuffer(&vga16fb);
-    iounmap(vga16fb.screen_base);
-    fb_dealloc_cmap(&vga16fb.cmap);
-    /* XXX unshare VGA regions */
+        platform_device_unregister(&vga16fb_device);
+        driver_unregister(&vga16fb_driver);
 }
 
 MODULE_LICENSE("GPL");