fbdev: add BF52x EZkit Display driver
authorMichael Hennerich <michael.hennerich@analog.com>
Mon, 10 Mar 2008 18:44:04 +0000 (11:44 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 11 Mar 2008 01:01:20 +0000 (18:01 -0700)
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/video/Kconfig
drivers/video/Makefile
drivers/video/bfin-t350mcqb-fb.c [new file with mode: 0644]

index 758435f8a6f8cb32f4e7413ad0eeafa7d4b74239..e0b0580705e40c70ae8bd679c2be068bed73f97a 100644 (file)
@@ -553,6 +553,19 @@ config FB_BF54X_LQ043
        help
         This is the framebuffer device driver for a SHARP LQ043T1DG01 TFT LCD
 
+config FB_BFIN_T350MCQB
+       tristate "Varitronix COG-T350MCQB TFT LCD display (BF527 EZKIT)"
+       depends on FB && BLACKFIN
+       select BFIN_GPTIMERS
+       select FB_CFB_FILLRECT
+       select FB_CFB_COPYAREA
+       select FB_CFB_IMAGEBLIT
+       help
+        This is the framebuffer device driver for a Varitronix VL-PS-COG-T350MCQB-01 display TFT LCD
+        This display is a QVGA 320x240 24-bit RGB display interfaced by an 8-bit wide PPI
+        It uses PPI[0..7] PPI_FS1, PPI_FS2 and PPI_CLK.
+
+
 config FB_STI
        tristate "HP STI frame buffer device support"
        depends on FB && PARISC
index 83e02b3429b64e5da5941301612da65806f73df4..03371c789039530bf4bb49cda8481c61e508dc83 100644 (file)
@@ -122,6 +122,7 @@ obj-$(CONFIG_FB_EFI)              += efifb.o
 obj-$(CONFIG_FB_VGA16)            += vga16fb.o
 obj-$(CONFIG_FB_OF)               += offb.o
 obj-$(CONFIG_FB_BF54X_LQ043)     += bf54x-lq043fb.o
+obj-$(CONFIG_FB_BFIN_T350MCQB)   += bfin-t350mcqb-fb.o
 
 # the test framebuffer is last
 obj-$(CONFIG_FB_VIRTUAL)          += vfb.o
diff --git a/drivers/video/bfin-t350mcqb-fb.c b/drivers/video/bfin-t350mcqb-fb.c
new file mode 100644 (file)
index 0000000..a2bb2de
--- /dev/null
@@ -0,0 +1,685 @@
+/*
+ * File:         drivers/video/bfin-t350mcqb-fb.c
+ * Based on:
+ * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
+ *
+ * Created:
+ * Description:  Blackfin LCD Framebufer driver
+ *
+ *
+ * Modified:
+ *               Copyright 2004-2007 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/backlight.h>
+#include <linux/lcd.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+#include <asm/dma-mapping.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+#include <asm/gptimers.h>
+
+#define NO_BL_SUPPORT
+
+#define LCD_X_RES              320     /* Horizontal Resolution */
+#define LCD_Y_RES              240     /* Vertical Resolution */
+#define LCD_BPP                        24      /* Bit Per Pixel */
+
+#define        DMA_BUS_SIZE            16
+#define        LCD_CLK                 (12*1000*1000)  /* 12MHz */
+
+#define CLOCKS_PER_PIX         3
+
+       /*
+        * HS and VS timing parameters (all in number of PPI clk ticks)
+        */
+
+#define U_LINE         1                               /* Blanking Lines */
+
+#define H_ACTPIX       (LCD_X_RES * CLOCKS_PER_PIX)    /* active horizontal pixel */
+#define H_PERIOD       (408 * CLOCKS_PER_PIX)          /* HS period */
+#define H_PULSE                90                              /* HS pulse width */
+#define H_START                204                             /* first valid pixel */
+
+#define        V_LINES         (LCD_Y_RES + U_LINE)            /* total vertical lines */
+#define V_PULSE                (3 * H_PERIOD)                  /* VS pulse width (1-5 H_PERIODs) */
+#define V_PERIOD       (H_PERIOD * V_LINES)            /* VS period */
+
+#define ACTIVE_VIDEO_MEM_OFFSET        (U_LINE * H_ACTPIX)
+
+#define BFIN_LCD_NBR_PALETTE_ENTRIES   256
+
+#define DRIVER_NAME "bfin-t350mcqb"
+static char driver_name[] = DRIVER_NAME;
+
+struct bfin_t350mcqbfb_info {
+       struct fb_info *fb;
+       struct device *dev;
+       unsigned char *fb_buffer;       /* RGB Buffer */
+       dma_addr_t dma_handle;
+       int lq043_mmap;
+       int lq043_open_cnt;
+       int irq;
+       spinlock_t lock;        /* lock */
+};
+
+static int nocursor;
+module_param(nocursor, int, 0644);
+MODULE_PARM_DESC(nocursor, "cursor enable/disable");
+
+#define PPI_TX_MODE            0x2
+#define PPI_XFER_TYPE_11       0xC
+#define PPI_PORT_CFG_01                0x10
+#define PPI_PACK_EN            0x80
+#define PPI_POLS_1             0x8000
+
+static void bfin_t350mcqb_config_ppi(struct bfin_t350mcqbfb_info *fbi)
+{
+       bfin_write_PPI_DELAY(H_START);
+       bfin_write_PPI_COUNT(H_ACTPIX-1);
+       bfin_write_PPI_FRAME(V_LINES);
+
+       bfin_write_PPI_CONTROL(PPI_TX_MODE |       /* output mode , PORT_DIR */
+                               PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
+                               PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
+                               PPI_PACK_EN |      /* packing enabled PACK_EN */
+                               PPI_POLS_1);       /* faling edge syncs POLS */
+}
+
+static inline void bfin_t350mcqb_disable_ppi(void)
+{
+       bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
+}
+
+static inline void bfin_t350mcqb_enable_ppi(void)
+{
+       bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
+}
+
+static void bfin_t350mcqb_start_timers(void)
+{
+       unsigned long flags;
+
+       local_irq_save(flags);
+               enable_gptimers(TIMER1bit);
+               enable_gptimers(TIMER0bit);
+       local_irq_restore(flags);
+}
+
+static void bfin_t350mcqb_stop_timers(void)
+{
+       disable_gptimers(TIMER0bit | TIMER1bit);
+
+       set_gptimer_status(0, TIMER_STATUS_TRUN0 | TIMER_STATUS_TRUN1 |
+                               TIMER_STATUS_TIMIL0 | TIMER_STATUS_TIMIL1 |
+                                TIMER_STATUS_TOVF0 | TIMER_STATUS_TOVF1);
+
+}
+
+static void bfin_t350mcqb_init_timers(void)
+{
+
+       bfin_t350mcqb_stop_timers();
+
+       set_gptimer_period(TIMER0_id, H_PERIOD);
+       set_gptimer_pwidth(TIMER0_id, H_PULSE);
+       set_gptimer_config(TIMER0_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
+                                     TIMER_TIN_SEL | TIMER_CLK_SEL|
+                                     TIMER_EMU_RUN);
+
+       set_gptimer_period(TIMER1_id, V_PERIOD);
+       set_gptimer_pwidth(TIMER1_id, V_PULSE);
+       set_gptimer_config(TIMER1_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
+                                     TIMER_TIN_SEL | TIMER_CLK_SEL |
+                                     TIMER_EMU_RUN);
+
+}
+
+static void bfin_t350mcqb_config_dma(struct bfin_t350mcqbfb_info *fbi)
+{
+
+       set_dma_config(CH_PPI,
+                      set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
+                                          INTR_DISABLE, DIMENSION_2D,
+                                          DATA_SIZE_16,
+                                          DMA_NOSYNC_KEEP_DMA_BUF));
+       set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
+       set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
+       set_dma_y_count(CH_PPI, V_LINES);
+
+       set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
+       set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
+
+}
+
+static int bfin_t350mcqb_request_ports(int action)
+{
+       u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
+                           P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
+                           P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
+                           P_PPI0_D6, P_PPI0_D7, 0};
+
+       if (action) {
+               if (peripheral_request_list(ppi0_req_8, DRIVER_NAME)) {
+                       printk(KERN_ERR "Requesting Peripherals faild\n");
+                       return -EFAULT;
+               }
+       } else
+               peripheral_free_list(ppi0_req_8);
+
+       return 0;
+}
+
+static int bfin_t350mcqb_fb_open(struct fb_info *info, int user)
+{
+       struct bfin_t350mcqbfb_info *fbi = info->par;
+
+       spin_lock(&fbi->lock);
+       fbi->lq043_open_cnt++;
+
+       if (fbi->lq043_open_cnt <= 1) {
+
+               bfin_t350mcqb_disable_ppi();
+               SSYNC();
+
+               bfin_t350mcqb_config_dma(fbi);
+               bfin_t350mcqb_config_ppi(fbi);
+               bfin_t350mcqb_init_timers();
+
+               /* start dma */
+               enable_dma(CH_PPI);
+               bfin_t350mcqb_enable_ppi();
+               bfin_t350mcqb_start_timers();
+       }
+
+       spin_unlock(&fbi->lock);
+
+       return 0;
+}
+
+static int bfin_t350mcqb_fb_release(struct fb_info *info, int user)
+{
+       struct bfin_t350mcqbfb_info *fbi = info->par;
+
+       spin_lock(&fbi->lock);
+
+       fbi->lq043_open_cnt--;
+       fbi->lq043_mmap = 0;
+
+       if (fbi->lq043_open_cnt <= 0) {
+               bfin_t350mcqb_disable_ppi();
+               SSYNC();
+               disable_dma(CH_PPI);
+               bfin_t350mcqb_stop_timers();
+               memset(fbi->fb_buffer, 0, info->fix.smem_len);
+       }
+
+       spin_unlock(&fbi->lock);
+
+       return 0;
+}
+
+static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
+                                  struct fb_info *info)
+{
+
+       if (var->bits_per_pixel != LCD_BPP) {
+               pr_debug("%s: depth not supported: %u BPP\n", __FUNCTION__,
+                        var->bits_per_pixel);
+               return -EINVAL;
+       }
+
+       if (info->var.xres != var->xres || info->var.yres != var->yres ||
+           info->var.xres_virtual != var->xres_virtual ||
+           info->var.yres_virtual != var->yres_virtual) {
+               pr_debug("%s: Resolution not supported: X%u x Y%u \n",
+                        __FUNCTION__, var->xres, var->yres);
+               return -EINVAL;
+       }
+
+       /*
+        *  Memory limit
+        */
+
+       if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
+               pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
+                        __FUNCTION__, var->yres_virtual);
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+static int bfin_t350mcqb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+       struct bfin_t350mcqbfb_info *fbi = info->par;
+
+       if (fbi->lq043_mmap)
+               return -1;
+
+       spin_lock(&fbi->lock);
+       fbi->lq043_mmap = 1;
+       spin_unlock(&fbi->lock);
+
+       vma->vm_start = (unsigned long)(fbi->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET);
+
+       vma->vm_end = vma->vm_start + info->fix.smem_len;
+       /* For those who don't understand how mmap works, go read
+        *   Documentation/nommu-mmap.txt.
+        * For those that do, you will know that the VM_MAYSHARE flag
+        * must be set in the vma->vm_flags structure on noMMU
+        *   Other flags can be set, and are documented in
+        *   include/linux/mm.h
+        */
+       vma->vm_flags |= VM_MAYSHARE;
+
+       return 0;
+}
+
+int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+       if (nocursor)
+               return 0;
+       else
+               return -EINVAL; /* just to force soft_cursor() call */
+}
+
+static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
+                                  u_int blue, u_int transp,
+                                  struct fb_info *info)
+{
+       if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
+               return -EINVAL;
+
+       if (info->var.grayscale) {
+               /* grayscale = 0.30*R + 0.59*G + 0.11*B */
+               red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+       }
+
+       if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+
+               u32 value;
+               /* Place color in the pseudopalette */
+               if (regno > 16)
+                       return -EINVAL;
+
+               red >>= (16 - info->var.red.length);
+               green >>= (16 - info->var.green.length);
+               blue >>= (16 - info->var.blue.length);
+
+               value = (red << info->var.red.offset) |
+                   (green << info->var.green.offset) |
+                   (blue << info->var.blue.offset);
+               value &= 0xFFFFFF;
+
+               ((u32 *) (info->pseudo_palette))[regno] = value;
+
+       }
+
+       return 0;
+}
+
+static struct fb_ops bfin_t350mcqb_fb_ops = {
+       .owner = THIS_MODULE,
+       .fb_open = bfin_t350mcqb_fb_open,
+       .fb_release = bfin_t350mcqb_fb_release,
+       .fb_check_var = bfin_t350mcqb_fb_check_var,
+       .fb_fillrect = cfb_fillrect,
+       .fb_copyarea = cfb_copyarea,
+       .fb_imageblit = cfb_imageblit,
+       .fb_mmap = bfin_t350mcqb_fb_mmap,
+       .fb_cursor = bfin_t350mcqb_fb_cursor,
+       .fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
+};
+
+#ifndef NO_BL_SUPPORT
+static int bl_get_brightness(struct backlight_device *bd)
+{
+       return 0;
+}
+
+static struct backlight_ops bfin_lq043fb_bl_ops = {
+       .get_brightness = bl_get_brightness,
+};
+
+static struct backlight_device *bl_dev;
+
+static int bfin_lcd_get_power(struct lcd_device *dev)
+{
+       return 0;
+}
+
+static int bfin_lcd_set_power(struct lcd_device *dev, int power)
+{
+       return 0;
+}
+
+static int bfin_lcd_get_contrast(struct lcd_device *dev)
+{
+       return 0;
+}
+
+static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
+{
+
+       return 0;
+}
+
+static int bfin_lcd_check_fb(struct fb_info *fi)
+{
+       if (!fi || (fi == &bfin_t350mcqb_fb))
+               return 1;
+       return 0;
+}
+
+static struct lcd_ops bfin_lcd_ops = {
+       .get_power = bfin_lcd_get_power,
+       .set_power = bfin_lcd_set_power,
+       .get_contrast = bfin_lcd_get_contrast,
+       .set_contrast = bfin_lcd_set_contrast,
+       .check_fb = bfin_lcd_check_fb,
+};
+
+static struct lcd_device *lcd_dev;
+#endif
+
+static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
+{
+       /*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
+
+       u16 status = bfin_read_PPI_STATUS();
+       bfin_write_PPI_STATUS(0xFFFF);
+
+       if (status) {
+               bfin_t350mcqb_disable_ppi();
+               disable_dma(CH_PPI);
+
+               /* start dma */
+               enable_dma(CH_PPI);
+               bfin_t350mcqb_enable_ppi();
+               bfin_write_PPI_STATUS(0xFFFF);
+       }
+
+       return IRQ_HANDLED;
+}
+
+static int __init bfin_t350mcqb_probe(struct platform_device *pdev)
+{
+       struct bfin_t350mcqbfb_info *info;
+       struct fb_info *fbinfo;
+       int ret;
+
+       printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
+                                        LCD_X_RES, LCD_Y_RES, LCD_BPP);
+
+       if (request_dma(CH_PPI, "CH_PPI") < 0) {
+               printk(KERN_ERR DRIVER_NAME
+                      ": couldn't request CH_PPI DMA\n");
+               ret = -EFAULT;
+               goto out1;
+       }
+
+       fbinfo =
+           framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
+       if (!fbinfo) {
+               ret = -ENOMEM;
+               goto out2;
+       }
+
+       info = fbinfo->par;
+       info->fb = fbinfo;
+       info->dev = &pdev->dev;
+
+       platform_set_drvdata(pdev, fbinfo);
+
+       strcpy(fbinfo->fix.id, driver_name);
+
+       fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
+       fbinfo->fix.type_aux = 0;
+       fbinfo->fix.xpanstep = 0;
+       fbinfo->fix.ypanstep = 0;
+       fbinfo->fix.ywrapstep = 0;
+       fbinfo->fix.accel = FB_ACCEL_NONE;
+       fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
+
+       fbinfo->var.nonstd = 0;
+       fbinfo->var.activate = FB_ACTIVATE_NOW;
+       fbinfo->var.height = -1;
+       fbinfo->var.width = -1;
+       fbinfo->var.accel_flags = 0;
+       fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
+
+       fbinfo->var.xres = LCD_X_RES;
+       fbinfo->var.xres_virtual = LCD_X_RES;
+       fbinfo->var.yres = LCD_Y_RES;
+       fbinfo->var.yres_virtual = LCD_Y_RES;
+       fbinfo->var.bits_per_pixel = LCD_BPP;
+
+       fbinfo->var.red.offset = 0;
+       fbinfo->var.green.offset = 8;
+       fbinfo->var.blue.offset = 16;
+       fbinfo->var.transp.offset = 0;
+       fbinfo->var.red.length = 8;
+       fbinfo->var.green.length = 8;
+       fbinfo->var.blue.length = 8;
+       fbinfo->var.transp.length = 0;
+       fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
+
+       fbinfo->fix.line_length = fbinfo->var.xres_virtual *
+           fbinfo->var.bits_per_pixel / 8;
+
+
+       fbinfo->fbops = &bfin_t350mcqb_fb_ops;
+       fbinfo->flags = FBINFO_FLAG_DEFAULT;
+
+       info->fb_buffer =
+           dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
+                              GFP_KERNEL);
+
+       if (NULL == info->fb_buffer) {
+               printk(KERN_ERR DRIVER_NAME
+                      ": couldn't allocate dma buffer.\n");
+               ret = -ENOMEM;
+               goto out3;
+       }
+
+       memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
+
+       fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
+       fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
+
+       fbinfo->fbops = &bfin_t350mcqb_fb_ops;
+
+       fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
+       if (!fbinfo->pseudo_palette) {
+               printk(KERN_ERR DRIVER_NAME
+                      "Fail to allocate pseudo_palette\n");
+
+               ret = -ENOMEM;
+               goto out4;
+       }
+
+       memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
+
+       if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
+           < 0) {
+               printk(KERN_ERR DRIVER_NAME
+                      "Fail to allocate colormap (%d entries)\n",
+                      BFIN_LCD_NBR_PALETTE_ENTRIES);
+               ret = -EFAULT;
+               goto out5;
+       }
+
+       if (bfin_t350mcqb_request_ports(1)) {
+               printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
+               ret = -EFAULT;
+               goto out6;
+       }
+
+       info->irq = platform_get_irq(pdev, 0);
+       if (info->irq < 0) {
+               ret = -EINVAL;
+               goto out7;
+       }
+
+       if (request_irq(info->irq, (void *)bfin_t350mcqb_irq_error, IRQF_DISABLED,
+                       "PPI ERROR", info) < 0) {
+               printk(KERN_ERR DRIVER_NAME
+                      ": unable to request PPI ERROR IRQ\n");
+               ret = -EFAULT;
+               goto out7;
+       }
+
+       if (register_framebuffer(fbinfo) < 0) {
+               printk(KERN_ERR DRIVER_NAME
+                      ": unable to register framebuffer.\n");
+               ret = -EINVAL;
+               goto out8;
+       }
+#ifndef NO_BL_SUPPORT
+       bl_dev =
+           backlight_device_register("bf52x-bl", NULL, NULL,
+                                     &bfin_lq043fb_bl_ops);
+       bl_dev->props.max_brightness = 255;
+
+       lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
+       lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
+#endif
+
+       return 0;
+
+out8:
+       free_irq(info->irq, info);
+out7:
+       bfin_t350mcqb_request_ports(0);
+out6:
+       fb_dealloc_cmap(&fbinfo->cmap);
+out5:
+       kfree(fbinfo->pseudo_palette);
+out4:
+       dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
+                         info->dma_handle);
+out3:
+       framebuffer_release(fbinfo);
+out2:
+       free_dma(CH_PPI);
+out1:
+       platform_set_drvdata(pdev, NULL);
+
+       return ret;
+}
+
+static int bfin_t350mcqb_remove(struct platform_device *pdev)
+{
+
+       struct fb_info *fbinfo = platform_get_drvdata(pdev);
+       struct bfin_t350mcqbfb_info *info = fbinfo->par;
+
+       free_dma(CH_PPI);
+       free_irq(info->irq, info);
+
+       if (info->fb_buffer != NULL)
+               dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
+                                 info->dma_handle);
+
+       kfree(fbinfo->pseudo_palette);
+       fb_dealloc_cmap(&fbinfo->cmap);
+
+#ifndef NO_BL_SUPPORT
+       lcd_device_unregister(lcd_dev);
+       backlight_device_unregister(bl_dev);
+#endif
+
+       unregister_framebuffer(fbinfo);
+
+       bfin_t350mcqb_request_ports(0);
+
+       printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       struct fb_info *fbinfo = platform_get_drvdata(pdev);
+       struct bfin_t350mcqbfb_info *info = fbinfo->par;
+
+       bfin_t350mcqb_disable_ppi();
+       disable_dma(CH_PPI);
+       bfin_write_PPI_STATUS(0xFFFF);
+
+       return 0;
+}
+
+static int bfin_t350mcqb_resume(struct platform_device *pdev)
+{
+       struct fb_info *fbinfo = platform_get_drvdata(pdev);
+       struct bfin_t350mcqbfb_info *info = fbinfo->par;
+
+       enable_dma(CH_PPI);
+       bfin_t350mcqb_enable_ppi();
+
+       return 0;
+}
+#else
+#define bfin_t350mcqb_suspend  NULL
+#define bfin_t350mcqb_resume   NULL
+#endif
+
+static struct platform_driver bfin_t350mcqb_driver = {
+       .probe = bfin_t350mcqb_probe,
+       .remove = bfin_t350mcqb_remove,
+       .suspend = bfin_t350mcqb_suspend,
+       .resume = bfin_t350mcqb_resume,
+       .driver = {
+                  .name = DRIVER_NAME,
+                  .owner = THIS_MODULE,
+                  },
+};
+
+static int __devinit bfin_t350mcqb_driver_init(void)
+{
+       return platform_driver_register(&bfin_t350mcqb_driver);
+}
+
+static void __exit bfin_t350mcqb_driver_cleanup(void)
+{
+       platform_driver_unregister(&bfin_t350mcqb_driver);
+}
+
+MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
+MODULE_LICENSE("GPL");
+
+module_init(bfin_t350mcqb_driver_init);
+module_exit(bfin_t350mcqb_driver_cleanup);