fbdev: add BF52x EZkit Display driver

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>

1 files changed, 685 insertions, 0 deletions

diff --git a/drivers/video/bfin-t350mcqb-fb.c b/drivers/video/bfin-t350mcqb-fb.c
new file mode 100644
index 000000000000..a2bb2de9e020
--- /dev/null
+++ b/drivers/video/bfin-t350mcqb-fb.c
@@ -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);