diff options
Diffstat (limited to 'drivers/video/mxc/mxcfb.c')
| -rw-r--r-- | drivers/video/mxc/mxcfb.c | 1372 |
1 files changed, 1372 insertions, 0 deletions
diff --git a/drivers/video/mxc/mxcfb.c b/drivers/video/mxc/mxcfb.c new file mode 100644 index 000000000000..93ce7f664976 --- /dev/null +++ b/drivers/video/mxc/mxcfb.c @@ -0,0 +1,1372 @@ +/* + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @defgroup Framebuffer Framebuffer Driver for SDC and ADC. + */ + +/*! + * @file mxcfb.c + * + * @brief MXC Frame buffer driver for SDC + * + * @ingroup Framebuffer + */ + +/*! + * Include files + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/fb.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/dma-mapping.h> +#include <linux/clk.h> +#include <linux/console.h> +#include <linux/io.h> +#include <linux/ipu.h> +#include <linux/mxcfb.h> +#include <linux/uaccess.h> +#include <asm/mach-types.h> + +/* + * Driver name + */ +#define MXCFB_NAME "mxc_sdc_fb" +/*! + * Structure containing the MXC specific framebuffer information. + */ +struct mxcfb_info { + int blank; + ipu_channel_t ipu_ch; + uint32_t ipu_ch_irq; + uint32_t cur_ipu_buf; + + u32 pseudo_palette[16]; + + struct semaphore flip_sem; + spinlock_t fb_lock; +}; + +struct mxcfb_data { + struct fb_info *fbi; + struct fb_info *fbi_ovl; + volatile int32_t vsync_flag; + wait_queue_head_t vsync_wq; + wait_queue_head_t suspend_wq; + bool suspended; + int backlight_level; +}; + +struct mxcfb_alloc_list { + struct list_head list; + dma_addr_t phy_addr; + void *cpu_addr; + u32 size; +}; + +static struct mxcfb_data mxcfb_drv_data; + +static char *fb_mode; +static unsigned long default_bpp = 16; +#ifdef CONFIG_FB_MXC_INTERNAL_MEM +static struct clk *iram_clk; +#endif +LIST_HEAD(fb_alloc_list); + +static uint32_t bpp_to_pixfmt(int bpp) +{ + uint32_t pixfmt = 0; + switch (bpp) { + case 24: + pixfmt = IPU_PIX_FMT_BGR24; + break; + case 32: + pixfmt = IPU_PIX_FMT_BGR32; + break; + case 16: + pixfmt = IPU_PIX_FMT_RGB565; + break; + } + return pixfmt; +} + +extern void gpio_lcd_active(void); +extern void gpio_lcd_inactive(void); +static irqreturn_t mxcfb_irq_handler(int irq, void *dev_id); +static int mxcfb_blank(int blank, struct fb_info *info); +static int mxcfb_map_video_memory(struct fb_info *fbi, bool use_internal_ram); +static int mxcfb_unmap_video_memory(struct fb_info *fbi); + +/* + * Set fixed framebuffer parameters based on variable settings. + * + * @param info framebuffer information pointer + */ +static int mxcfb_set_fix(struct fb_info *info) +{ + struct fb_fix_screeninfo *fix = &info->fix; + struct fb_var_screeninfo *var = &info->var; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)info->par; + + if (mxc_fbi->ipu_ch == MEM_SDC_FG) + strncpy(fix->id, "DISP3 FG", 8); + else + strncpy(fix->id, "DISP3 BG", 8); + + fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; + + fix->type = FB_TYPE_PACKED_PIXELS; + fix->accel = FB_ACCEL_NONE; + fix->visual = FB_VISUAL_TRUECOLOR; + fix->xpanstep = 1; + fix->ypanstep = 1; + + return 0; +} + +/* + * Set framebuffer parameters and change the operating mode. + * + * @param info framebuffer information pointer + */ +static int mxcfb_set_par(struct fb_info *fbi) +{ + int retval; + bool use_iram = false; + u32 mem_len; + ipu_di_signal_cfg_t sig_cfg; + ipu_panel_t mode = IPU_PANEL_TFT; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + ipu_disable_irq(mxc_fbi->ipu_ch_irq); + ipu_disable_channel(mxc_fbi->ipu_ch, true); + ipu_uninit_channel(mxc_fbi->ipu_ch); + ipu_clear_irq(mxc_fbi->ipu_ch_irq); + mxcfb_set_fix(fbi); + + mem_len = fbi->var.yres_virtual * fbi->fix.line_length; + if (mem_len > fbi->fix.smem_len) { + if (fbi->fix.smem_start) + mxcfb_unmap_video_memory(fbi); + +#ifdef CONFIG_FB_MXC_INTERNAL_MEM + if (mxc_fbi->ipu_ch == MEM_SDC_BG) { + use_iram = true; + } +#endif + if (mxcfb_map_video_memory(fbi, use_iram) < 0) + return -ENOMEM; + } + + ipu_init_channel(mxc_fbi->ipu_ch, NULL); + + /* Clear the screen */ + memset((char *)fbi->screen_base, 0, fbi->fix.smem_len); + + if (mxc_fbi->ipu_ch == MEM_SDC_BG) { + memset(&sig_cfg, 0, sizeof(sig_cfg)); + if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT) + sig_cfg.Hsync_pol = true; + if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT) + sig_cfg.Vsync_pol = true; + if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL)) + sig_cfg.clk_pol = true; + if (fbi->var.sync & FB_SYNC_DATA_INVERT) + sig_cfg.data_pol = true; + if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT)) + sig_cfg.enable_pol = true; + if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN) + sig_cfg.clkidle_en = true; + if (fbi->var.sync & FB_SYNC_SHARP_MODE) + mode = IPU_PANEL_SHARP_TFT; + + dev_dbg(fbi->device, "pixclock = %ul Hz\n", + (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL)); + + if (ipu_sdc_init_panel(mode, + (PICOS2KHZ(fbi->var.pixclock)) * 1000UL, + fbi->var.xres, fbi->var.yres, + (fbi->var.sync & FB_SYNC_SWAP_RGB) ? + IPU_PIX_FMT_BGR666 : IPU_PIX_FMT_RGB666, + fbi->var.left_margin, + fbi->var.hsync_len, + fbi->var.right_margin, + fbi->var.upper_margin, + fbi->var.vsync_len, + fbi->var.lower_margin, sig_cfg) != 0) { + dev_err(fbi->device, + "mxcfb: Error initializing panel.\n"); + return -EINVAL; + } + + fbi->mode = + (struct fb_videomode *)fb_match_mode(&fbi->var, + &fbi->modelist); + } + + ipu_disp_set_window_pos(mxc_fbi->ipu_ch, 0, 0); + + mxc_fbi->cur_ipu_buf = 1; + sema_init(&mxc_fbi->flip_sem, 1); + fbi->var.xoffset = fbi->var.yoffset = 0; + + retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER, + bpp_to_pixfmt(fbi->var.bits_per_pixel), + fbi->var.xres, fbi->var.yres, + fbi->var.xres_virtual, + IPU_ROTATE_NONE, + fbi->fix.smem_start + + (fbi->fix.line_length * fbi->var.yres), + fbi->fix.smem_start, + 0, 0); + if (retval) { + dev_err(fbi->device, + "ipu_init_channel_buffer error %d\n", retval); + return retval; + } + + if (mxc_fbi->blank == FB_BLANK_UNBLANK) { + ipu_enable_channel(mxc_fbi->ipu_ch); + } + + return 0; +} + +/* + * Check framebuffer variable parameters and adjust to valid values. + * + * @param var framebuffer variable parameters + * + * @param info framebuffer information pointer + */ +static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + u32 vtotal; + u32 htotal; + + if (var->xres_virtual < var->xres) + var->xres_virtual = var->xres; + if (var->yres_virtual < var->yres) + var->yres_virtual = var->yres; + +#ifdef CONFIG_FB_MXC_INTERNAL_MEM + if ((info->fix.smem_start == FB_RAM_BASE_ADDR) && + ((var->yres_virtual * var->xres_virtual * var->bits_per_pixel / 8) > + FB_RAM_SIZE)) { + return -EINVAL; + } +#endif + + if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) && + (var->bits_per_pixel != 16)) { + var->bits_per_pixel = default_bpp; + } + + switch (var->bits_per_pixel) { + case 16: + var->red.length = 5; + var->red.offset = 11; + var->red.msb_right = 0; + + var->green.length = 6; + var->green.offset = 5; + var->green.msb_right = 0; + + var->blue.length = 5; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 0; + var->transp.offset = 0; + var->transp.msb_right = 0; + break; + case 24: + var->red.length = 8; + var->red.offset = 16; + var->red.msb_right = 0; + + var->green.length = 8; + var->green.offset = 8; + var->green.msb_right = 0; + + var->blue.length = 8; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 0; + var->transp.offset = 0; + var->transp.msb_right = 0; + break; + case 32: + var->red.length = 8; + var->red.offset = 16; + var->red.msb_right = 0; + + var->green.length = 8; + var->green.offset = 8; + var->green.msb_right = 0; + + var->blue.length = 8; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 8; + var->transp.offset = 24; + var->transp.msb_right = 0; + break; + } + + if (var->pixclock < 1000) { + htotal = var->xres + var->right_margin + var->hsync_len + + var->left_margin; + vtotal = var->yres + var->lower_margin + var->vsync_len + + var->upper_margin; + var->pixclock = (vtotal * htotal * 6UL) / 100UL; + var->pixclock = KHZ2PICOS(var->pixclock); + dev_dbg(info->device, + "pixclock set for 60Hz refresh = %u ps\n", + var->pixclock); + } + + var->height = -1; + var->width = -1; + var->grayscale = 0; + + /* nonstd used for YUV formats, but only RGB supported */ + var->nonstd = 0; + + return 0; +} + +static inline u_int _chan_to_field(u_int chan, struct fb_bitfield *bf) +{ + chan &= 0xffff; + chan >>= 16 - bf->length; + return chan << bf->offset; +} +static int +mxcfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int trans, struct fb_info *fbi) +{ + unsigned int val; + int ret = 1; + + /* + * If greyscale is true, then we convert the RGB value + * to greyscale no matter what visual we are using. + */ + if (fbi->var.grayscale) + red = green = blue = (19595 * red + 38470 * green + + 7471 * blue) >> 16; + switch (fbi->fix.visual) { + case FB_VISUAL_TRUECOLOR: + /* + * 16-bit True Colour. We encode the RGB value + * according to the RGB bitfield information. + */ + if (regno < 16) { + u32 *pal = fbi->pseudo_palette; + + val = _chan_to_field(red, &fbi->var.red); + val |= _chan_to_field(green, &fbi->var.green); + val |= _chan_to_field(blue, &fbi->var.blue); + + pal[regno] = val; + ret = 0; + } + break; + + case FB_VISUAL_STATIC_PSEUDOCOLOR: + case FB_VISUAL_PSEUDOCOLOR: + break; + } + + return ret; +} + +/* + * Function to handle custom ioctls for MXC framebuffer. + * + * @param inode inode struct + * + * @param file file struct + * + * @param cmd Ioctl command to handle + * + * @param arg User pointer to command arguments + * + * @param fbi framebuffer information pointer + */ +static int mxcfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg) +{ + int retval = 0; + int __user *argp = (void __user *)arg; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == + false)); + if (retval < 0) + return retval; + + switch (cmd) { + case MXCFB_SET_GBL_ALPHA: + { + struct mxcfb_gbl_alpha ga; + if (copy_from_user(&ga, (void *)arg, sizeof(ga))) { + retval = -EFAULT; + break; + } + retval = + ipu_sdc_set_global_alpha((bool) ga.enable, + ga.alpha); + dev_dbg(fbi->device, "Set global alpha to %d\n", + ga.alpha); + break; + } + case MXCFB_SET_CLR_KEY: + { + struct mxcfb_color_key key; + if (copy_from_user(&key, (void *)arg, sizeof(key))) { + retval = -EFAULT; + break; + } + retval = ipu_sdc_set_color_key(MEM_SDC_BG, key.enable, + key.color_key); + dev_dbg(fbi->device, "Set color key to 0x%08X\n", + key.color_key); + break; + } + case MXCFB_WAIT_FOR_VSYNC: + { +#ifndef CONFIG_ARCH_MX3 + mxcfb_drv_data.vsync_flag = 0; + ipu_enable_irq(IPU_IRQ_SDC_DISP3_VSYNC); + if (!wait_event_interruptible_timeout + (mxcfb_drv_data.vsync_wq, + mxcfb_drv_data.vsync_flag != 0, 1 * HZ)) { + dev_err(fbi->device, + "MXCFB_WAIT_FOR_VSYNC: timeout\n"); + retval = -ETIME; + break; + } else if (signal_pending(current)) { + dev_err(fbi->device, + "MXCFB_WAIT_FOR_VSYNC: interrupt received\n"); + retval = -ERESTARTSYS; + break; + } +#endif + break; + } + case MXCFB_GET_FB_IPU_CHAN: + { + struct mxcfb_info *mxc_fbi = + (struct mxcfb_info *)fbi->par; + + if (put_user(mxc_fbi->ipu_ch, argp)) + return -EFAULT; + + break; + } + default: + retval = -EINVAL; + } + return retval; +} + +/* + * Function to handle custom ioctls for MXC framebuffer. + * + * @param inode inode struct + * + * @param file file struct + * + * @param cmd Ioctl command to handle + * + * @param arg User pointer to command arguments + * + * @param fbi framebuffer information pointer + */ +static int mxcfb_ioctl_ovl(struct fb_info *fbi, unsigned int cmd, + unsigned long arg) +{ + int retval = 0; + int __user *argp = (void __user *)arg; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + switch (cmd) { + case FBIO_ALLOC: + { + int size; + struct mxcfb_alloc_list *mem; + + mem = kzalloc(sizeof(*mem), GFP_KERNEL); + if (mem == NULL) + return -ENOMEM; + + if (get_user(size, argp)) + return -EFAULT; + + mem->size = PAGE_ALIGN(size); + + mem->cpu_addr = dma_alloc_coherent(fbi->device, size, + &mem->phy_addr, + GFP_DMA); + if (mem->cpu_addr == NULL) { + kfree(mem); + return -ENOMEM; + } + + list_add(&mem->list, &fb_alloc_list); + + dev_dbg(fbi->device, "allocated %d bytes @ 0x%08X\n", + mem->size, mem->phy_addr); + + if (put_user(mem->phy_addr, argp)) + return -EFAULT; + + break; + } + case FBIO_FREE: + { + unsigned long offset; + struct mxcfb_alloc_list *mem; + + if (get_user(offset, argp)) + return -EFAULT; + + retval = -EINVAL; + list_for_each_entry(mem, &fb_alloc_list, list) { + if (mem->phy_addr == offset) { + list_del(&mem->list); + dma_free_coherent(fbi->device, + mem->size, + mem->cpu_addr, + mem->phy_addr); + kfree(mem); + retval = 0; + break; + } + } + + break; + } + case MXCFB_SET_OVERLAY_POS: + { + struct mxcfb_pos pos; + if (copy_from_user(&pos, (void *)arg, sizeof(pos))) { + retval = -EFAULT; + break; + } + retval = ipu_disp_set_window_pos(mxc_fbi->ipu_ch, + pos.x, pos.y); + break; + } + case MXCFB_GET_FB_IPU_CHAN: + { + struct mxcfb_info *mxc_fbi = + (struct mxcfb_info *)fbi->par; + + if (put_user(mxc_fbi->ipu_ch, argp)) + return -EFAULT; + + break; + } + default: + retval = -EINVAL; + } + return retval; +} + +/* + * mxcfb_blank(): + * Blank the display. + */ +static int mxcfb_blank(int blank, struct fb_info *info) +{ + int retval; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)info->par; + + dev_dbg(info->device, "blank = %d\n", blank); + + if (mxc_fbi->blank == blank) + return 0; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + mxc_fbi->blank = blank; + + switch (blank) { + case FB_BLANK_POWERDOWN: + case FB_BLANK_VSYNC_SUSPEND: + case FB_BLANK_HSYNC_SUSPEND: + case FB_BLANK_NORMAL: + ipu_disable_channel(MEM_SDC_BG, true); + gpio_lcd_inactive(); + break; + case FB_BLANK_UNBLANK: + gpio_lcd_active(); + ipu_enable_channel(MEM_SDC_BG); + break; + } + return 0; +} + +/* + * mxcfb_blank_ovl(): + * Blank the display. + */ +static int mxcfb_blank_ovl(int blank, struct fb_info *info) +{ + int retval; + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)info->par; + + dev_dbg(info->device, "ovl blank = %d\n", blank); + + if (mxc_fbi->blank == blank) + return 0; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + mxc_fbi->blank = blank; + + switch (blank) { + case FB_BLANK_POWERDOWN: + case FB_BLANK_VSYNC_SUSPEND: + case FB_BLANK_HSYNC_SUSPEND: + case FB_BLANK_NORMAL: + ipu_disable_channel(MEM_SDC_FG, true); + break; + case FB_BLANK_UNBLANK: + ipu_enable_channel(MEM_SDC_FG); + break; + } + return 0; +} + +/* + * Pan or Wrap the Display + * + * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag + * + * @param var Variable screen buffer information + * @param info Framebuffer information pointer + */ +static int +mxcfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) +{ + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)info->par; + unsigned long lock_flags = 0; + int retval; + u_int y_bottom; + unsigned long base; + + retval = wait_event_interruptible(mxcfb_drv_data.suspend_wq, + (mxcfb_drv_data.suspended == false)); + if (retval < 0) + return retval; + + if (var->xoffset > 0) { + dev_dbg(info->device, "x panning not supported\n"); + return -EINVAL; + } + + if ((info->var.xoffset == var->xoffset) && + (info->var.yoffset == var->yoffset)) { + /* No change, do nothing */ + return 0; + } + + y_bottom = var->yoffset; + + if (!(var->vmode & FB_VMODE_YWRAP)) { + y_bottom += var->yres; + } + + if (y_bottom > info->var.yres_virtual) { + return -EINVAL; + } + + base = (var->yoffset * var->xres_virtual + var->xoffset); + base *= (var->bits_per_pixel) / 8; + base += info->fix.smem_start; + + down(&mxc_fbi->flip_sem); + + spin_lock_irqsave(&mxc_fbi->fb_lock, lock_flags); + + dev_dbg(info->device, "Updating SDC BG buf %d address=0x%08lX\n", + mxc_fbi->cur_ipu_buf, base); + + mxc_fbi->cur_ipu_buf = !mxc_fbi->cur_ipu_buf; + if (ipu_update_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER, + mxc_fbi->cur_ipu_buf, base) == 0) { + ipu_select_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER, + mxc_fbi->cur_ipu_buf); + ipu_clear_irq(mxc_fbi->ipu_ch_irq); + ipu_enable_irq(mxc_fbi->ipu_ch_irq); + } else { + dev_err(info->device, + "Error updating SDC buf %d to address=0x%08lX\n", + mxc_fbi->cur_ipu_buf, base); + } + + spin_unlock_irqrestore(&mxc_fbi->fb_lock, lock_flags); + + dev_dbg(info->device, "Update complete\n"); + + info->var.xoffset = var->xoffset; + info->var.yoffset = var->yoffset; + + if (var->vmode & FB_VMODE_YWRAP) { + info->var.vmode |= FB_VMODE_YWRAP; + } else { + info->var.vmode &= ~FB_VMODE_YWRAP; + } + + return 0; +} + +/* + * Function to handle custom mmap for MXC framebuffer. + * + * @param fbi framebuffer information pointer + * + * @param vma Pointer to vm_area_struct + */ +static int mxcfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma) +{ + bool found = false; + u32 len; + unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; + struct mxcfb_alloc_list *mem; + + if (offset < fbi->fix.smem_len) { + /* mapping framebuffer memory */ + len = fbi->fix.smem_len - offset; + vma->vm_pgoff = (fbi->fix.smem_start + offset) >> PAGE_SHIFT; + } else { + list_for_each_entry(mem, &fb_alloc_list, list) { + if (offset == mem->phy_addr) { + found = true; + len = mem->size; + break; + } + } + if (!found) { + return -EINVAL; + } + } + + len = PAGE_ALIGN(len); + if (vma->vm_end - vma->vm_start > len) { + return -EINVAL; + } + + /* make buffers write-thru cacheable */ + vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot) & + ~L_PTE_BUFFERABLE); + + vma->vm_flags |= VM_IO | VM_RESERVED; + + if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, vma->vm_page_prot)) { + dev_dbg(fbi->device, "mmap remap_pfn_range failed\n"); + return -ENOBUFS; + + } + + return 0; +} + +/*! + * This structure contains the pointers to the control functions that are + * invoked by the core framebuffer driver to perform operations like + * blitting, rectangle filling, copy regions and cursor definition. + */ +static struct fb_ops mxcfb_ops = { + .owner = THIS_MODULE, + .fb_set_par = mxcfb_set_par, + .fb_check_var = mxcfb_check_var, + .fb_setcolreg = mxcfb_setcolreg, + .fb_pan_display = mxcfb_pan_display, + .fb_ioctl = mxcfb_ioctl, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_blank = mxcfb_blank, +}; + +static struct fb_ops mxcfb_ovl_ops = { + .owner = THIS_MODULE, + .fb_set_par = mxcfb_set_par, + .fb_check_var = mxcfb_check_var, + .fb_setcolreg = mxcfb_setcolreg, + .fb_pan_display = mxcfb_pan_display, + .fb_ioctl = mxcfb_ioctl_ovl, + .fb_mmap = mxcfb_mmap, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_blank = mxcfb_blank_ovl, +}; + +static irqreturn_t mxcfb_vsync_irq_handler(int irq, void *dev_id) +{ + struct mxcfb_data *fb_data = dev_id; + + ipu_disable_irq(irq); + + fb_data->vsync_flag = 1; + wake_up_interruptible(&fb_data->vsync_wq); + return IRQ_HANDLED; +} + +static irqreturn_t mxcfb_irq_handler(int irq, void *dev_id) +{ + struct fb_info *fbi = dev_id; + struct mxcfb_info *mxc_fbi = fbi->par; + + up(&mxc_fbi->flip_sem); + ipu_disable_irq(irq); + return IRQ_HANDLED; +} + +#ifdef CONFIG_PM +/* + * Power management hooks. Note that we won't be called from IRQ context, + * unlike the blank functions above, so we may sleep. + */ + +/* + * Suspends the framebuffer and blanks the screen. Power management support + */ +static int mxcfb_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct mxcfb_data *drv_data = platform_get_drvdata(pdev); + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)drv_data->fbi->par; + struct mxcfb_info *mxc_fbi_ovl = + (struct mxcfb_info *)drv_data->fbi_ovl->par; +#ifdef CONFIG_FB_MXC_LOW_PWR_DISPLAY + void *fbmem; +#endif + + drv_data->suspended = true; + + acquire_console_sem(); + fb_set_suspend(drv_data->fbi, 1); + fb_set_suspend(drv_data->fbi_ovl, 1); + release_console_sem(); + + if (mxc_fbi_ovl->blank == FB_BLANK_UNBLANK) { + ipu_disable_channel(MEM_SDC_FG, true); + } + + if (mxc_fbi->blank == FB_BLANK_UNBLANK) { +#ifdef CONFIG_FB_MXC_LOW_PWR_DISPLAY + if (drv_data->fbi->fix.smem_start != FB_RAM_BASE_ADDR) { + fbmem = ioremap(FB_RAM_BASE_ADDR, FB_RAM_SIZE); + memcpy(fbmem, drv_data->fbi->screen_base, FB_RAM_SIZE); + iounmap(fbmem); + mxc_fbi->cur_ipu_buf = !mxc_fbi->cur_ipu_buf; + ipu_update_channel_buffer(MEM_SDC_BG, IPU_INPUT_BUFFER, + mxc_fbi->cur_ipu_buf, + FB_RAM_BASE_ADDR); + ipu_select_buffer(MEM_SDC_BG, IPU_INPUT_BUFFER, + mxc_fbi->cur_ipu_buf); + } + ipu_lowpwr_display_enable(); +#else + ipu_disable_channel(MEM_SDC_BG, true); + gpio_lcd_inactive(); +#endif + } + return 0; +} + +/* + * Resumes the framebuffer and unblanks the screen. Power management support + */ +static int mxcfb_resume(struct platform_device *pdev) +{ + struct mxcfb_data *drv_data = platform_get_drvdata(pdev); + struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)drv_data->fbi->par; + struct mxcfb_info *mxc_fbi_ovl = + (struct mxcfb_info *)drv_data->fbi_ovl->par; + + drv_data->suspended = false; + + if (mxc_fbi->blank == FB_BLANK_UNBLANK) { +#ifdef CONFIG_FB_MXC_LOW_PWR_DISPLAY + ipu_lowpwr_display_disable(); + if (drv_data->fbi->fix.smem_start != FB_RAM_BASE_ADDR) { + mxc_fbi->cur_ipu_buf = !mxc_fbi->cur_ipu_buf; + ipu_update_channel_buffer(MEM_SDC_BG, IPU_INPUT_BUFFER, + mxc_fbi->cur_ipu_buf, + drv_data->fbi->fix. + smem_start); + ipu_select_buffer(MEM_SDC_BG, IPU_INPUT_BUFFER, + mxc_fbi->cur_ipu_buf); + } +#else + gpio_lcd_active(); + ipu_enable_channel(MEM_SDC_BG); +#endif + } + + if (mxc_fbi_ovl->blank == FB_BLANK_UNBLANK) { + ipu_enable_channel(MEM_SDC_FG); + } + + acquire_console_sem(); + fb_set_suspend(drv_data->fbi, 0); + fb_set_suspend(drv_data->fbi_ovl, 0); + release_console_sem(); + + wake_up_interruptible(&drv_data->suspend_wq); + return 0; +} +#else +#define mxcfb_suspend NULL +#define mxcfb_resume NULL +#endif + +/* + * Main framebuffer functions + */ + +/*! + * Allocates the DRAM memory for the frame buffer. This buffer is remapped + * into a non-cached, non-buffered, memory region to allow palette and pixel + * writes to occur without flushing the cache. Once this area is remapped, + * all virtual memory access to the video memory should occur at the new region. + * + * @param fbi framebuffer information pointer + * + * @param use_internal_ram flag on whether to use internal RAM for memory + * + * @return Error code indicating success or failure + */ +static int mxcfb_map_video_memory(struct fb_info *fbi, bool use_internal_ram) +{ + int retval = 0; + +#ifdef CONFIG_FB_MXC_INTERNAL_MEM + if (use_internal_ram) { + fbi->fix.smem_len = FB_RAM_SIZE; + fbi->fix.smem_start = FB_RAM_BASE_ADDR; + if (fbi->fix.smem_len < + (fbi->var.yres_virtual * fbi->fix.line_length)) { + dev_err(fbi->device, + "Not enough internal RAM for framebuffer configuration\n"); + retval = -EINVAL; + goto err0; + } + + if (request_mem_region(fbi->fix.smem_start, fbi->fix.smem_len, + fbi->device->driver->name) == NULL) { + dev_err(fbi->device, + "Unable to request internal RAM\n"); + retval = -ENOMEM; + goto err0; + } + + fbi->screen_base = ioremap(fbi->fix.smem_start, + fbi->fix.smem_len); + if (!fbi->screen_base) { + dev_err(fbi->device, + "Unable to map fb memory to virtual address\n"); + release_mem_region(fbi->fix.smem_start, + fbi->fix.smem_len); + retval = -EIO; + goto err0; + } + + iram_clk = clk_get(NULL, "iram_clk"); + clk_enable(iram_clk); + } else +#endif + { + fbi->fix.smem_len = fbi->var.yres_virtual * + fbi->fix.line_length; + fbi->screen_base = + dma_alloc_writecombine(fbi->device, + fbi->fix.smem_len, + (dma_addr_t *) &fbi->fix.smem_start, + GFP_DMA); + + if (fbi->screen_base == 0) { + dev_err(fbi->device, + "Unable to allocate framebuffer memory\n"); + retval = -EBUSY; + goto err0; + } + } + + dev_dbg(fbi->device, "allocated fb @ paddr=0x%08X, size=%d.\n", + (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len); + + fbi->screen_size = fbi->fix.smem_len; + + /* Clear the screen */ + memset((char *)fbi->screen_base, 0, fbi->fix.smem_len); + + return 0; + + err0: + fbi->fix.smem_len = 0; + fbi->fix.smem_start = 0; + fbi->screen_base = NULL; + return retval; +} + +/*! + * De-allocates the DRAM memory for the frame buffer. + * + * @param fbi framebuffer information pointer + * + * @return Error code indicating success or failure + */ +static int mxcfb_unmap_video_memory(struct fb_info *fbi) +{ +#ifdef CONFIG_FB_MXC_INTERNAL_MEM + if (fbi->fix.smem_start == FB_RAM_BASE_ADDR) { + iounmap(fbi->screen_base); + release_mem_region(fbi->fix.smem_start, fbi->fix.smem_len); + fbi->fix.smem_start = 0; + fbi->fix.smem_len = 0; + clk_disable(iram_clk); + } else +#endif + { + dma_free_writecombine(fbi->device, fbi->fix.smem_len, + fbi->screen_base, fbi->fix.smem_start); + } + fbi->screen_base = 0; + fbi->fix.smem_start = 0; + fbi->fix.smem_len = 0; + return 0; +} + +/*! + * Initializes the framebuffer information pointer. After allocating + * sufficient memory for the framebuffer structure, the fields are + * filled with custom information passed in from the configurable + * structures. This includes information such as bits per pixel, + * color maps, screen width/height and RGBA offsets. + * + * @return Framebuffer structure initialized with our information + */ +static struct fb_info *mxcfb_init_fbinfo(struct device *dev, struct fb_ops *ops) +{ + struct fb_info *fbi; + struct mxcfb_info *mxcfbi; + + /* + * Allocate sufficient memory for the fb structure + */ + fbi = framebuffer_alloc(sizeof(struct mxcfb_info), dev); + if (!fbi) + return NULL; + + mxcfbi = (struct mxcfb_info *)fbi->par; + + fbi->var.activate = FB_ACTIVATE_NOW; + + fbi->fbops = ops; + fbi->flags = FBINFO_FLAG_DEFAULT; + fbi->pseudo_palette = mxcfbi->pseudo_palette; + + spin_lock_init(&mxcfbi->fb_lock); + + /* + * Allocate colormap + */ + fb_alloc_cmap(&fbi->cmap, 16, 0); + + return fbi; +} + +/*! + * Probe routine for the framebuffer driver. It is called during the + * driver binding process. The following functions are performed in + * this routine: Framebuffer initialization, Memory allocation and + * mapping, Framebuffer registration, IPU initialization. + * + * @return Appropriate error code to the kernel common code + */ +static int mxcfb_probe(struct platform_device *pdev) +{ + char *mode = pdev->dev.platform_data; + struct fb_info *fbi; + struct mxcfb_info *mxcfbi; + struct fb_info *fbi_ovl; + int ret = 0; + + /* + * Initialize FB structures + */ + fbi = mxcfb_init_fbinfo(&pdev->dev, &mxcfb_ops); + if (!fbi) { + ret = -ENOMEM; + goto err0; + } + mxcfbi = (struct mxcfb_info *)fbi->par; + + mxcfbi->ipu_ch_irq = IPU_IRQ_SDC_BG_EOF; + mxcfbi->cur_ipu_buf = 0; + mxcfbi->ipu_ch = MEM_SDC_BG; + + ipu_sdc_set_global_alpha(true, 0xFF); + ipu_sdc_set_color_key(MEM_SDC_BG, false, 0); + + if (ipu_request_irq(IPU_IRQ_SDC_BG_EOF, mxcfb_irq_handler, 0, + MXCFB_NAME, fbi) != 0) { + dev_err(&pdev->dev, "Error registering BG irq handler.\n"); + ret = -EBUSY; + goto err1; + } + ipu_disable_irq(IPU_IRQ_SDC_BG_EOF); + + if (fb_mode == NULL) { + fb_mode = mode; + } + + if (!fb_find_mode(&fbi->var, fbi, fb_mode, mxcfb_modedb, + mxcfb_modedb_sz, NULL, default_bpp)) { + ret = -EBUSY; + goto err2; + } + fb_videomode_to_modelist(mxcfb_modedb, mxcfb_modedb_sz, &fbi->modelist); + + /* Default Y virtual size is 2x panel size */ +#ifndef CONFIG_FB_MXC_INTERNAL_MEM + fbi->var.yres_virtual = fbi->var.yres * 2; +#endif + + mxcfb_drv_data.fbi = fbi; + mxcfb_drv_data.backlight_level = 255; + mxcfb_drv_data.suspended = false; + init_waitqueue_head(&mxcfb_drv_data.suspend_wq); + + mxcfbi->blank = FB_BLANK_NORMAL; + ret = mxcfb_set_par(fbi); + if (ret < 0) { + goto err2; + } + mxcfb_blank(FB_BLANK_UNBLANK, fbi); + + /* + * Register framebuffer + */ + ret = register_framebuffer(fbi); + if (ret < 0) { + goto err2; + } + + /* + * Initialize Overlay FB structures + */ + fbi_ovl = mxcfb_init_fbinfo(&pdev->dev, &mxcfb_ovl_ops); + if (!fbi_ovl) { + ret = -ENOMEM; + goto err3; + } + mxcfb_drv_data.fbi_ovl = fbi_ovl; + mxcfbi = (struct mxcfb_info *)fbi_ovl->par; + + mxcfbi->ipu_ch_irq = IPU_IRQ_SDC_FG_EOF; + mxcfbi->cur_ipu_buf = 0; + mxcfbi->ipu_ch = MEM_SDC_FG; + + if (ipu_request_irq(IPU_IRQ_SDC_FG_EOF, mxcfb_irq_handler, 0, + MXCFB_NAME, fbi_ovl) != 0) { + dev_err(fbi->device, "Error registering FG irq handler.\n"); + ret = -EBUSY; + goto err4; + } + ipu_disable_irq(mxcfbi->ipu_ch_irq); + + /* Default Y virtual size is 2x panel size */ + fbi_ovl->var = fbi->var; + fbi_ovl->var.yres_virtual = fbi->var.yres * 2; + + /* Overlay is blanked by default */ + mxcfbi->blank = FB_BLANK_NORMAL; + + ret = mxcfb_set_par(fbi_ovl); + if (ret < 0) { + goto err5; + } + + /* + * Register overlay framebuffer + */ + ret = register_framebuffer(fbi_ovl); + if (ret < 0) { + goto err5; + } + + platform_set_drvdata(pdev, &mxcfb_drv_data); + + init_waitqueue_head(&mxcfb_drv_data.vsync_wq); + if (!cpu_is_mx31() && !cpu_is_mx32()) { + ret = ipu_request_irq(IPU_IRQ_SDC_DISP3_VSYNC, + mxcfb_vsync_irq_handler, + 0, MXCFB_NAME, + &mxcfb_drv_data); + if (ret < 0) + goto err6; + ipu_disable_irq(IPU_IRQ_SDC_DISP3_VSYNC); + } + + printk(KERN_INFO "mxcfb: fb registered, using mode %s\n", fb_mode); + return 0; + + err6: + unregister_framebuffer(fbi_ovl); + err5: + ipu_free_irq(IPU_IRQ_SDC_FG_EOF, fbi_ovl); + err4: + fb_dealloc_cmap(&fbi_ovl->cmap); + framebuffer_release(fbi_ovl); + err3: + unregister_framebuffer(fbi); + err2: + ipu_free_irq(IPU_IRQ_SDC_BG_EOF, fbi); + err1: + fb_dealloc_cmap(&fbi->cmap); + framebuffer_release(fbi); + err0: + printk(KERN_ERR "mxcfb: failed to register fb\n"); + return ret; +} + +/*! + * This structure contains pointers to the power management callback functions. + */ +static struct platform_driver mxcfb_driver = { + .driver = { + .name = MXCFB_NAME, + }, + .probe = mxcfb_probe, + .suspend = mxcfb_suspend, + .resume = mxcfb_resume, +}; + +/* + * Parse user specified options (`video=trident:') + * example: + * video=trident:800x600,bpp=16,noaccel + */ +int mxcfb_setup(char *options) +{ + char *opt; + if (!options || !*options) + return 0; + while ((opt = strsep(&options, ",")) != NULL) { + if (!*opt) + continue; + if (!strncmp(opt, "bpp=", 4)) + default_bpp = simple_strtoul(opt + 4, NULL, 0); + else + fb_mode = opt; + } + return 0; +} + +/*! + * Main entry function for the framebuffer. The function registers the power + * management callback functions with the kernel and also registers the MXCFB + * callback functions with the core Linux framebuffer driver \b fbmem.c + * + * @return Error code indicating success or failure + */ +int __init mxcfb_init(void) +{ + int ret = 0; +#ifndef MODULE + char *option = NULL; +#endif + +#ifndef MODULE + if (fb_get_options("mxcfb", &option)) + return -ENODEV; + mxcfb_setup(option); +#endif + + ret = platform_driver_register(&mxcfb_driver); + return ret; +} + +void mxcfb_exit(void) +{ + struct fb_info *fbi = mxcfb_drv_data.fbi; + + if (fbi) { + mxcfb_unmap_video_memory(fbi); + + if (&fbi->cmap) + fb_dealloc_cmap(&fbi->cmap); + + unregister_framebuffer(fbi); + framebuffer_release(fbi); + } + + fbi = mxcfb_drv_data.fbi_ovl; + if (fbi) { + mxcfb_unmap_video_memory(fbi); + + if (&fbi->cmap) + fb_dealloc_cmap(&fbi->cmap); + + unregister_framebuffer(fbi); + framebuffer_release(fbi); + } +#ifndef CONFIG_ARCH_MX3 + ipu_free_irq(IPU_IRQ_SDC_DISP3_VSYNC, &mxcfb_drv_data); +#endif + + platform_driver_unregister(&mxcfb_driver); +} + +module_init(mxcfb_init); +module_exit(mxcfb_exit); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("MXC framebuffer driver"); +MODULE_LICENSE("GPL"); +MODULE_SUPPORTED_DEVICE("fb"); |