video, sm501: add I/O functions for use on powerpc

- add read/write functions for using this driver
  also on powerpc plattforms

Signed-off-by: Heiko Schocher <hs@denx.de>
cc: linux-fbdev@vger.kernel.org
cc: devicetree-discuss@ozlabs.org
cc: Ben Dooks <ben@simtec.co.uk>
cc: Vincent Sanders <vince@simtec.co.uk>
cc: Samuel Ortiz <sameo@linux.intel.com>
cc: linux-kernel@vger.kernel.org
cc: Randy Dunlap <rdunlap@xenotime.net>
cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 90 insertions, 82 deletions

diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c
index bcb44a594ebc..5df406c87c50 100644
--- a/drivers/video/sm501fb.c
+++ b/drivers/video/sm501fb.c
@@ -117,7 +117,7 @@ static inline int v_total(struct fb_var_screeninfo *var)
 
 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
 {
-        readl(info->regs);
+        smc501_readl(info->regs);
 }
 
 /* sm501_alloc_mem
@@ -262,7 +262,7 @@ static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
 
         /* set gamma values */
         for (offset = 0; offset < 256 * 4; offset += 4) {
-                writel(value, fbi->regs + palette + offset);
+                smc501_writel(value, fbi->regs + palette + offset);
                 value += 0x010101;      /* Advance RGB by 1,1,1.*/
         }
 }
@@ -476,7 +476,8 @@ static int sm501fb_set_par_common(struct fb_info *info,
 
         /* set start of framebuffer to the screen */
 
-        writel(par->screen.sm_addr | SM501_ADDR_FLIP, fbi->regs + head_addr);
+        smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP,
+                        fbi->regs + head_addr);
 
         /* program CRT clock  */
 
@@ -519,7 +520,7 @@ static void sm501fb_set_par_geometry(struct fb_info *info,
         reg = info->fix.line_length;
         reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
 
-        writel(reg, fbi->regs + (par->head == HEAD_CRT ?
+        smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ?
                     SM501_DC_CRT_FB_OFFSET :  SM501_DC_PANEL_FB_OFFSET));
 
         /* program horizontal total */
@@ -527,27 +528,27 @@ static void sm501fb_set_par_geometry(struct fb_info *info,
         reg  = (h_total(var) - 1) << 16;
         reg |= (var->xres - 1);
 
-        writel(reg, base + SM501_OFF_DC_H_TOT);
+        smc501_writel(reg, base + SM501_OFF_DC_H_TOT);
 
         /* program horizontal sync */
 
         reg  = var->hsync_len << 16;
         reg |= var->xres + var->right_margin - 1;
 
-        writel(reg, base + SM501_OFF_DC_H_SYNC);
+        smc501_writel(reg, base + SM501_OFF_DC_H_SYNC);
 
         /* program vertical total */
 
         reg  = (v_total(var) - 1) << 16;
         reg |= (var->yres - 1);
 
-        writel(reg, base + SM501_OFF_DC_V_TOT);
+        smc501_writel(reg, base + SM501_OFF_DC_V_TOT);
 
         /* program vertical sync */
         reg  = var->vsync_len << 16;
         reg |= var->yres + var->lower_margin - 1;
 
-        writel(reg, base + SM501_OFF_DC_V_SYNC);
+        smc501_writel(reg, base + SM501_OFF_DC_V_SYNC);
 }
 
 /* sm501fb_pan_crt
@@ -566,15 +567,15 @@ static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
 
         xoffs = var->xoffset * bytes_pixel;
 
-        reg = readl(fbi->regs + SM501_DC_CRT_CONTROL);
+        reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 
         reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
         reg |= ((xoffs & 15) / bytes_pixel) << 4;
-        writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
+        smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
 
         reg = (par->screen.sm_addr + xoffs +
                var->yoffset * info->fix.line_length);
-        writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
+        smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
 
         sm501fb_sync_regs(fbi);
         return 0;
@@ -593,10 +594,10 @@ static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
         unsigned long reg;
 
         reg = var->xoffset | (var->xres_virtual << 16);
-        writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
+        smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
 
         reg = var->yoffset | (var->yres_virtual << 16);
-        writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
+        smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
 
         sm501fb_sync_regs(fbi);
         return 0;
@@ -622,7 +623,7 @@ static int sm501fb_set_par_crt(struct fb_info *info)
         /* enable CRT DAC - note 0 is on!*/
         sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
 
-        control = readl(fbi->regs + SM501_DC_CRT_CONTROL);
+        control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 
         control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
                     SM501_DC_CRT_CONTROL_GAMMA |
@@ -684,7 +685,7 @@ static int sm501fb_set_par_crt(struct fb_info *info)
  out_update:
         dev_dbg(fbi->dev, "new control is %08lx\n", control);
 
-        writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
+        smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
         sm501fb_sync_regs(fbi);
 
         return 0;
@@ -696,18 +697,18 @@ static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
         void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
         struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
 
-        control = readl(ctrl_reg);
+        control = smc501_readl(ctrl_reg);
 
         if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
                 /* enable panel power */
 
                 control |= SM501_DC_PANEL_CONTROL_VDD;  /* FPVDDEN */
-                writel(control, ctrl_reg);
+                smc501_writel(control, ctrl_reg);
                 sm501fb_sync_regs(fbi);
                 mdelay(10);
 
                 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
-                writel(control, ctrl_reg);
+                smc501_writel(control, ctrl_reg);
                 sm501fb_sync_regs(fbi);
                 mdelay(10);
 
@@ -719,7 +720,7 @@ static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
                         else
                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
 
-                        writel(control, ctrl_reg);
+                        smc501_writel(control, ctrl_reg);
                         sm501fb_sync_regs(fbi);
                         mdelay(10);
                 }
@@ -730,7 +731,7 @@ static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
                         else
                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
 
-                        writel(control, ctrl_reg);
+                        smc501_writel(control, ctrl_reg);
                         sm501fb_sync_regs(fbi);
                         mdelay(10);
                 }
@@ -742,7 +743,7 @@ static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
                         else
                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
 
-                        writel(control, ctrl_reg);
+                        smc501_writel(control, ctrl_reg);
                         sm501fb_sync_regs(fbi);
                         mdelay(10);
                 }
@@ -753,18 +754,18 @@ static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
                         else
                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
 
-                        writel(control, ctrl_reg);
+                        smc501_writel(control, ctrl_reg);
                         sm501fb_sync_regs(fbi);
                         mdelay(10);
                 }
 
                 control &= ~SM501_DC_PANEL_CONTROL_DATA;
-                writel(control, ctrl_reg);
+                smc501_writel(control, ctrl_reg);
                 sm501fb_sync_regs(fbi);
                 mdelay(10);
 
                 control &= ~SM501_DC_PANEL_CONTROL_VDD;
-                writel(control, ctrl_reg);
+                smc501_writel(control, ctrl_reg);
                 sm501fb_sync_regs(fbi);
                 mdelay(10);
         }
@@ -799,7 +800,7 @@ static int sm501fb_set_par_pnl(struct fb_info *info)
 
         /* update control register */
 
-        control = readl(fbi->regs + SM501_DC_PANEL_CONTROL);
+        control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL);
         control &= (SM501_DC_PANEL_CONTROL_GAMMA |
                     SM501_DC_PANEL_CONTROL_VDD  |
                     SM501_DC_PANEL_CONTROL_DATA |
@@ -833,16 +834,16 @@ static int sm501fb_set_par_pnl(struct fb_info *info)
                 BUG();
         }
 
-        writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
+        smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
 
         /* panel plane top left and bottom right location */
 
-        writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
+        smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
 
         reg  = var->xres - 1;
         reg |= (var->yres - 1) << 16;
 
-        writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
+        smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
 
         /* program panel control register */
 
@@ -855,7 +856,7 @@ static int sm501fb_set_par_pnl(struct fb_info *info)
         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
                 control |= SM501_DC_PANEL_CONTROL_VSP;
 
-        writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
+        smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
         sm501fb_sync_regs(fbi);
 
         /* ensure the panel interface is not tristated at this point */
@@ -924,7 +925,7 @@ static int sm501fb_setcolreg(unsigned regno,
                         val |= (green >> 8) << 8;
                         val |= blue >> 8;
 
-                        writel(val, base + (regno * 4));
+                        smc501_writel(val, base + (regno * 4));
                 }
 
                 break;
@@ -980,7 +981,7 @@ static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
 
         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
 
-        ctrl = readl(fbi->regs + SM501_DC_CRT_CONTROL);
+        ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
 
         switch (blank_mode) {
         case FB_BLANK_POWERDOWN:
@@ -1004,7 +1005,7 @@ static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
 
         }
 
-        writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
+        smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
         sm501fb_sync_regs(fbi);
 
         return 0;
@@ -1041,12 +1042,14 @@ static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
         if (cursor->image.depth > 1)
                 return -EINVAL;
 
-        hwc_addr = readl(base + SM501_OFF_HWC_ADDR);
+        hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
 
         if (cursor->enable)
-                writel(hwc_addr | SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
+                smc501_writel(hwc_addr | SM501_HWC_EN,
+                                base + SM501_OFF_HWC_ADDR);
         else
-                writel(hwc_addr & ~SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
+                smc501_writel(hwc_addr & ~SM501_HWC_EN,
+                                base + SM501_OFF_HWC_ADDR);
 
         /* set data */
         if (cursor->set & FB_CUR_SETPOS) {
@@ -1060,7 +1063,7 @@ static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 
                 //y += cursor->image.height;
 
-                writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
+                smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
         }
 
         if (cursor->set & FB_CUR_SETCMAP) {
@@ -1080,8 +1083,8 @@ static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 
                 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
 
-                writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
-                writel(fg, base + SM501_OFF_HWC_COLOR_3);
+                smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
+                smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
         }
 
         if (cursor->set & FB_CUR_SETSIZE ||
@@ -1102,7 +1105,7 @@ static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
                         __func__, cursor->image.width, cursor->image.height);
 
                 for (op = 0; op < (64*64*2)/8; op+=4)
-                        writel(0x0, dst + op);
+                        smc501_writel(0x0, dst + op);
 
                 for (y = 0; y < cursor->image.height; y++) {
                         for (x = 0; x < cursor->image.width; x++) {
@@ -1141,7 +1144,7 @@ static ssize_t sm501fb_crtsrc_show(struct device *dev,
         struct sm501fb_info *info = dev_get_drvdata(dev);
         unsigned long ctrl;
 
-        ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
+        ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
         ctrl &= SM501_DC_CRT_CONTROL_SEL;
 
         return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
@@ -1172,7 +1175,7 @@ static ssize_t sm501fb_crtsrc_store(struct device *dev,
 
         dev_info(dev, "setting crt source to head %d\n", head);
 
-        ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
+        ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
 
         if (head == HEAD_CRT) {
                 ctrl |= SM501_DC_CRT_CONTROL_SEL;
@@ -1184,7 +1187,7 @@ static ssize_t sm501fb_crtsrc_store(struct device *dev,
                 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
         }
 
-        writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
+        smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
         sm501fb_sync_regs(info);
 
         return len;
@@ -1205,7 +1208,8 @@ static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
         unsigned int reg;
 
         for (reg = start; reg < (len + start); reg += 4)
-                ptr += sprintf(ptr, "%08x = %08x\n", reg, readl(mem + reg));
+                ptr += sprintf(ptr, "%08x = %08x\n", reg,
+                                smc501_readl(mem + reg));
 
         return ptr - buf;
 }
@@ -1257,7 +1261,7 @@ static int sm501fb_sync(struct fb_info *info)
 
         /* wait for the 2d engine to be ready */
         while ((count > 0) &&
-               (readl(fbi->regs + SM501_SYSTEM_CONTROL) &
+               (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
                 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
                 count--;
 
@@ -1312,45 +1316,46 @@ static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *are
                 return;
 
         /* set the base addresses */
-        writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
-        writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_DESTINATION_BASE);
+        smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
+        smc501_writel(par->screen.sm_addr,
+                        fbi->regs2d + SM501_2D_DESTINATION_BASE);
 
         /* set the window width */
-        writel((info->var.xres << 16) | info->var.xres,
+        smc501_writel((info->var.xres << 16) | info->var.xres,
                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
 
         /* set window stride */
-        writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
+        smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
                fbi->regs2d + SM501_2D_PITCH);
 
         /* set data format */
         switch (info->var.bits_per_pixel) {
         case 8:
-                writel(0, fbi->regs2d + SM501_2D_STRETCH);
+                smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
                 break;
         case 16:
-                writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
+                smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
                 break;
         case 32:
-                writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
+                smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
                 break;
         }
 
         /* 2d compare mask */
-        writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
+        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
 
         /* 2d mask */
-        writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
+        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
 
         /* source and destination x y */
-        writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
-        writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
+        smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
+        smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
 
         /* w/h */
-        writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
+        smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
 
         /* do area move */
-        writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
+        smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
 }
 
 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
@@ -1372,47 +1377,49 @@ static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rec
                 return;
 
         /* set the base addresses */
-        writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
-        writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_DESTINATION_BASE);
+        smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
+        smc501_writel(par->screen.sm_addr,
+                        fbi->regs2d + SM501_2D_DESTINATION_BASE);
 
         /* set the window width */
-        writel((info->var.xres << 16) | info->var.xres,
+        smc501_writel((info->var.xres << 16) | info->var.xres,
                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
 
         /* set window stride */
-        writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
+        smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
                fbi->regs2d + SM501_2D_PITCH);
 
         /* set data format */
         switch (info->var.bits_per_pixel) {
         case 8:
-                writel(0, fbi->regs2d + SM501_2D_STRETCH);
+                smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
                 break;
         case 16:
-                writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
+                smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
                 break;
         case 32:
-                writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
+                smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
                 break;
         }
 
         /* 2d compare mask */
-        writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
+        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
 
         /* 2d mask */
-        writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
+        smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
 
         /* colour */
-        writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
+        smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
 
         /* x y */
-        writel((rect->dx << 16) | rect->dy, fbi->regs2d + SM501_2D_DESTINATION);
+        smc501_writel((rect->dx << 16) | rect->dy,
+                        fbi->regs2d + SM501_2D_DESTINATION);
 
         /* w/h */
-        writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
+        smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
 
         /* do rectangle fill */
-        writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
+        smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
 }
 
 
@@ -1470,11 +1477,12 @@ static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
 
         /* initialise the colour registers */
 
-        writel(par->cursor.sm_addr, par->cursor_regs + SM501_OFF_HWC_ADDR);
+        smc501_writel(par->cursor.sm_addr,
+                        par->cursor_regs + SM501_OFF_HWC_ADDR);
 
-        writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
-        writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
-        writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
+        smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
+        smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
+        smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
         sm501fb_sync_regs(info);
 
         return 0;
@@ -1581,7 +1589,7 @@ static int sm501fb_start(struct sm501fb_info *info,
 
         /* clear palette ram - undefined at power on */
         for (k = 0; k < (256 * 3); k++)
-                writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
+                smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
 
         /* enable display controller */
         sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
@@ -1649,20 +1657,20 @@ static int sm501fb_init_fb(struct fb_info *fb,
         switch (head) {
         case HEAD_CRT:
                 pd = info->pdata->fb_crt;
-                ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
+                ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
                 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
 
                 /* ensure we set the correct source register */
                 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
                         ctrl |= SM501_DC_CRT_CONTROL_SEL;
-                        writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
+                        smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
                 }
 
                 break;
 
         case HEAD_PANEL:
                 pd = info->pdata->fb_pnl;
-                ctrl = readl(info->regs + SM501_DC_PANEL_CONTROL);
+                ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
                 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
                 break;
 
@@ -1680,7 +1688,7 @@ static int sm501fb_init_fb(struct fb_info *fb,
 
         if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
-                writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
+                smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
                 enable = 0;
         }
 
@@ -2085,7 +2093,7 @@ static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
         struct sm501fb_info *info = platform_get_drvdata(pdev);
 
         /* store crt control to resume with */
-        info->pm_crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
+        info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
 
         sm501fb_suspend_fb(info, HEAD_CRT);
         sm501fb_suspend_fb(info, HEAD_PANEL);
@@ -2109,10 +2117,10 @@ static int sm501fb_resume(struct platform_device *pdev)
 
         /* restore the items we want to be saved for crt control */
 
-        crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
+        crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
         crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
         crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
-        writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
+        smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
 
         sm501fb_resume_fb(info, HEAD_CRT);
         sm501fb_resume_fb(info, HEAD_PANEL);