diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/nuc900fb.c | 764 |
1 files changed, 764 insertions, 0 deletions
diff --git a/drivers/video/fbdev/nuc900fb.c b/drivers/video/fbdev/nuc900fb.c new file mode 100644 index 000000000..6680edae4 --- /dev/null +++ b/drivers/video/fbdev/nuc900fb.c @@ -0,0 +1,764 @@ +/* + * + * Copyright (c) 2009 Nuvoton technology corporation + * All rights reserved. + * + * 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. + * + * Description: + * Nuvoton LCD Controller Driver + * Author: + * Wang Qiang (rurality.linux@gmail.com) 2009/12/11 + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/interrupt.h> +#include <linux/workqueue.h> +#include <linux/wait.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/cpufreq.h> +#include <linux/io.h> +#include <linux/pm.h> +#include <linux/device.h> + +#include <mach/map.h> +#include <mach/regs-clock.h> +#include <mach/regs-ldm.h> +#include <linux/platform_data/video-nuc900fb.h> + +#include "nuc900fb.h" + + +/* + * Initialize the nuc900 video (dual) buffer address + */ +static void nuc900fb_set_lcdaddr(struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + void __iomem *regs = fbi->io; + unsigned long vbaddr1, vbaddr2; + + vbaddr1 = info->fix.smem_start; + vbaddr2 = info->fix.smem_start; + vbaddr2 += info->fix.line_length * info->var.yres; + + /* set frambuffer start phy addr*/ + writel(vbaddr1, regs + REG_LCM_VA_BADDR0); + writel(vbaddr2, regs + REG_LCM_VA_BADDR1); + + writel(fbi->regs.lcd_va_fbctrl, regs + REG_LCM_VA_FBCTRL); + writel(fbi->regs.lcd_va_scale, regs + REG_LCM_VA_SCALE); +} + +/* + * calculate divider for lcd div + */ +static unsigned int nuc900fb_calc_pixclk(struct nuc900fb_info *fbi, + unsigned long pixclk) +{ + unsigned long clk = fbi->clk_rate; + unsigned long long div; + + /* pixclk is in picseconds. our clock is in Hz*/ + /* div = (clk * pixclk)/10^12 */ + div = (unsigned long long)clk * pixclk; + div >>= 12; + do_div(div, 625 * 625UL * 625); + + dev_dbg(fbi->dev, "pixclk %ld, divisor is %lld\n", pixclk, div); + + return div; +} + +/* + * Check the video params of 'var'. + */ +static int nuc900fb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + struct nuc900fb_mach_info *mach_info = dev_get_platdata(fbi->dev); + struct nuc900fb_display *display = NULL; + struct nuc900fb_display *default_display = mach_info->displays + + mach_info->default_display; + int i; + + dev_dbg(fbi->dev, "check_var(var=%p, info=%p)\n", var, info); + + /* validate x/y resolution */ + /* choose default mode if possible */ + if (var->xres == default_display->xres && + var->yres == default_display->yres && + var->bits_per_pixel == default_display->bpp) + display = default_display; + else + for (i = 0; i < mach_info->num_displays; i++) + if (var->xres == mach_info->displays[i].xres && + var->yres == mach_info->displays[i].yres && + var->bits_per_pixel == mach_info->displays[i].bpp) { + display = mach_info->displays + i; + break; + } + + if (display == NULL) { + printk(KERN_ERR "wrong resolution or depth %dx%d at %d bit per pixel\n", + var->xres, var->yres, var->bits_per_pixel); + return -EINVAL; + } + + /* it should be the same size as the display */ + var->xres_virtual = display->xres; + var->yres_virtual = display->yres; + var->height = display->height; + var->width = display->width; + + /* copy lcd settings */ + var->pixclock = display->pixclock; + var->left_margin = display->left_margin; + var->right_margin = display->right_margin; + var->upper_margin = display->upper_margin; + var->lower_margin = display->lower_margin; + var->vsync_len = display->vsync_len; + var->hsync_len = display->hsync_len; + + var->transp.offset = 0; + var->transp.length = 0; + + fbi->regs.lcd_dccs = display->dccs; + fbi->regs.lcd_device_ctrl = display->devctl; + fbi->regs.lcd_va_fbctrl = display->fbctrl; + fbi->regs.lcd_va_scale = display->scale; + + /* set R/G/B possions */ + switch (var->bits_per_pixel) { + case 1: + case 2: + case 4: + case 8: + default: + var->red.offset = 0; + var->red.length = var->bits_per_pixel; + var->green = var->red; + var->blue = var->red; + break; + case 12: + var->red.length = 4; + var->green.length = 4; + var->blue.length = 4; + var->red.offset = 8; + var->green.offset = 4; + var->blue.offset = 0; + break; + case 16: + var->red.length = 5; + var->green.length = 6; + var->blue.length = 5; + var->red.offset = 11; + var->green.offset = 5; + var->blue.offset = 0; + break; + case 18: + var->red.length = 6; + var->green.length = 6; + var->blue.length = 6; + var->red.offset = 12; + var->green.offset = 6; + var->blue.offset = 0; + break; + case 32: + var->red.length = 8; + var->green.length = 8; + var->blue.length = 8; + var->red.offset = 16; + var->green.offset = 8; + var->blue.offset = 0; + break; + } + + return 0; +} + +/* + * Calculate lcd register values from var setting & save into hw + */ +static void nuc900fb_calculate_lcd_regs(const struct fb_info *info, + struct nuc900fb_hw *regs) +{ + const struct fb_var_screeninfo *var = &info->var; + int vtt = var->height + var->upper_margin + var->lower_margin; + int htt = var->width + var->left_margin + var->right_margin; + int hsync = var->width + var->right_margin; + int vsync = var->height + var->lower_margin; + + regs->lcd_crtc_size = LCM_CRTC_SIZE_VTTVAL(vtt) | + LCM_CRTC_SIZE_HTTVAL(htt); + regs->lcd_crtc_dend = LCM_CRTC_DEND_VDENDVAL(var->height) | + LCM_CRTC_DEND_HDENDVAL(var->width); + regs->lcd_crtc_hr = LCM_CRTC_HR_EVAL(var->width + 5) | + LCM_CRTC_HR_SVAL(var->width + 1); + regs->lcd_crtc_hsync = LCM_CRTC_HSYNC_EVAL(hsync + var->hsync_len) | + LCM_CRTC_HSYNC_SVAL(hsync); + regs->lcd_crtc_vr = LCM_CRTC_VR_EVAL(vsync + var->vsync_len) | + LCM_CRTC_VR_SVAL(vsync); + +} + +/* + * Activate (set) the controller from the given framebuffer + * information + */ +static void nuc900fb_activate_var(struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + void __iomem *regs = fbi->io; + struct fb_var_screeninfo *var = &info->var; + int clkdiv; + + clkdiv = nuc900fb_calc_pixclk(fbi, var->pixclock) - 1; + if (clkdiv < 0) + clkdiv = 0; + + nuc900fb_calculate_lcd_regs(info, &fbi->regs); + + /* set the new lcd registers*/ + + dev_dbg(fbi->dev, "new lcd register set:\n"); + dev_dbg(fbi->dev, "dccs = 0x%08x\n", fbi->regs.lcd_dccs); + dev_dbg(fbi->dev, "dev_ctl = 0x%08x\n", fbi->regs.lcd_device_ctrl); + dev_dbg(fbi->dev, "crtc_size = 0x%08x\n", fbi->regs.lcd_crtc_size); + dev_dbg(fbi->dev, "crtc_dend = 0x%08x\n", fbi->regs.lcd_crtc_dend); + dev_dbg(fbi->dev, "crtc_hr = 0x%08x\n", fbi->regs.lcd_crtc_hr); + dev_dbg(fbi->dev, "crtc_hsync = 0x%08x\n", fbi->regs.lcd_crtc_hsync); + dev_dbg(fbi->dev, "crtc_vr = 0x%08x\n", fbi->regs.lcd_crtc_vr); + + writel(fbi->regs.lcd_device_ctrl, regs + REG_LCM_DEV_CTRL); + writel(fbi->regs.lcd_crtc_size, regs + REG_LCM_CRTC_SIZE); + writel(fbi->regs.lcd_crtc_dend, regs + REG_LCM_CRTC_DEND); + writel(fbi->regs.lcd_crtc_hr, regs + REG_LCM_CRTC_HR); + writel(fbi->regs.lcd_crtc_hsync, regs + REG_LCM_CRTC_HSYNC); + writel(fbi->regs.lcd_crtc_vr, regs + REG_LCM_CRTC_VR); + + /* set lcd address pointers */ + nuc900fb_set_lcdaddr(info); + + writel(fbi->regs.lcd_dccs, regs + REG_LCM_DCCS); +} + +/* + * Alters the hardware state. + * + */ +static int nuc900fb_set_par(struct fb_info *info) +{ + struct fb_var_screeninfo *var = &info->var; + + switch (var->bits_per_pixel) { + case 32: + case 24: + case 18: + case 16: + case 12: + info->fix.visual = FB_VISUAL_TRUECOLOR; + break; + case 1: + info->fix.visual = FB_VISUAL_MONO01; + break; + default: + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + break; + } + + info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; + + /* activate this new configuration */ + nuc900fb_activate_var(info); + return 0; +} + +static inline unsigned int chan_to_field(unsigned int chan, + struct fb_bitfield *bf) +{ + chan &= 0xffff; + chan >>= 16 - bf->length; + return chan << bf->offset; +} + +static int nuc900fb_setcolreg(unsigned regno, + unsigned red, unsigned green, unsigned blue, + unsigned transp, struct fb_info *info) +{ + unsigned int val; + + switch (info->fix.visual) { + case FB_VISUAL_TRUECOLOR: + /* true-colour, use pseuo-palette */ + if (regno < 16) { + u32 *pal = info->pseudo_palette; + + val = chan_to_field(red, &info->var.red); + val |= chan_to_field(green, &info->var.green); + val |= chan_to_field(blue, &info->var.blue); + pal[regno] = val; + } + break; + + default: + return 1; /* unknown type */ + } + return 0; +} + +/** + * nuc900fb_blank + * + */ +static int nuc900fb_blank(int blank_mode, struct fb_info *info) +{ + + return 0; +} + +static struct fb_ops nuc900fb_ops = { + .owner = THIS_MODULE, + .fb_check_var = nuc900fb_check_var, + .fb_set_par = nuc900fb_set_par, + .fb_blank = nuc900fb_blank, + .fb_setcolreg = nuc900fb_setcolreg, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, +}; + + +static inline void modify_gpio(void __iomem *reg, + unsigned long set, unsigned long mask) +{ + unsigned long tmp; + tmp = readl(reg) & ~mask; + writel(tmp | set, reg); +} + +/* + * Initialise LCD-related registers + */ +static int nuc900fb_init_registers(struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + struct nuc900fb_mach_info *mach_info = dev_get_platdata(fbi->dev); + void __iomem *regs = fbi->io; + + /*reset the display engine*/ + writel(0, regs + REG_LCM_DCCS); + writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_ENG_RST, + regs + REG_LCM_DCCS); + ndelay(100); + writel(readl(regs + REG_LCM_DCCS) & (~LCM_DCCS_ENG_RST), + regs + REG_LCM_DCCS); + ndelay(100); + + writel(0, regs + REG_LCM_DEV_CTRL); + + /* config gpio output */ + modify_gpio(W90X900_VA_GPIO + 0x54, mach_info->gpio_dir, + mach_info->gpio_dir_mask); + modify_gpio(W90X900_VA_GPIO + 0x58, mach_info->gpio_data, + mach_info->gpio_data_mask); + + return 0; +} + + +/* + * Alloc the SDRAM region of NUC900 for the frame buffer. + * The buffer should be a non-cached, non-buffered, memory region + * to allow palette and pixel writes without flushing the cache. + */ +static int nuc900fb_map_video_memory(struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + dma_addr_t map_dma; + unsigned long map_size = PAGE_ALIGN(info->fix.smem_len); + + dev_dbg(fbi->dev, "nuc900fb_map_video_memory(fbi=%p) map_size %lu\n", + fbi, map_size); + + info->screen_base = dma_alloc_wc(fbi->dev, map_size, &map_dma, + GFP_KERNEL); + + if (!info->screen_base) + return -ENOMEM; + + memset(info->screen_base, 0x00, map_size); + info->fix.smem_start = map_dma; + + return 0; +} + +static inline void nuc900fb_unmap_video_memory(struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + dma_free_wc(fbi->dev, PAGE_ALIGN(info->fix.smem_len), + info->screen_base, info->fix.smem_start); +} + +static irqreturn_t nuc900fb_irqhandler(int irq, void *dev_id) +{ + struct nuc900fb_info *fbi = dev_id; + void __iomem *regs = fbi->io; + void __iomem *irq_base = fbi->irq_base; + unsigned long lcdirq = readl(regs + REG_LCM_INT_CS); + + if (lcdirq & LCM_INT_CS_DISP_F_STATUS) { + writel(readl(irq_base) | 1<<30, irq_base); + + /* wait VA_EN low */ + if ((readl(regs + REG_LCM_DCCS) & + LCM_DCCS_SINGLE) == LCM_DCCS_SINGLE) + while ((readl(regs + REG_LCM_DCCS) & + LCM_DCCS_VA_EN) == LCM_DCCS_VA_EN) + ; + /* display_out-enable */ + writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_DISP_OUT_EN, + regs + REG_LCM_DCCS); + /* va-enable*/ + writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_VA_EN, + regs + REG_LCM_DCCS); + } else if (lcdirq & LCM_INT_CS_UNDERRUN_INT) { + writel(readl(irq_base) | LCM_INT_CS_UNDERRUN_INT, irq_base); + } else if (lcdirq & LCM_INT_CS_BUS_ERROR_INT) { + writel(readl(irq_base) | LCM_INT_CS_BUS_ERROR_INT, irq_base); + } + + return IRQ_HANDLED; +} + +#ifdef CONFIG_CPU_FREQ + +static int nuc900fb_cpufreq_transition(struct notifier_block *nb, + unsigned long val, void *data) +{ + struct nuc900fb_info *info; + struct fb_info *fbinfo; + long delta_f; + info = container_of(nb, struct nuc900fb_info, freq_transition); + fbinfo = platform_get_drvdata(to_platform_device(info->dev)); + + delta_f = info->clk_rate - clk_get_rate(info->clk); + + if ((val == CPUFREQ_POSTCHANGE && delta_f > 0) || + (val == CPUFREQ_PRECHANGE && delta_f < 0)) { + info->clk_rate = clk_get_rate(info->clk); + nuc900fb_activate_var(fbinfo); + } + + return 0; +} + +static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi) +{ + fbi->freq_transition.notifier_call = nuc900fb_cpufreq_transition; + return cpufreq_register_notifier(&fbi->freq_transition, + CPUFREQ_TRANSITION_NOTIFIER); +} + +static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *fbi) +{ + cpufreq_unregister_notifier(&fbi->freq_transition, + CPUFREQ_TRANSITION_NOTIFIER); +} +#else +static inline int nuc900fb_cpufreq_transition(struct notifier_block *nb, + unsigned long val, void *data) +{ + return 0; +} + +static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi) +{ + return 0; +} + +static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *info) +{ +} +#endif + +static char driver_name[] = "nuc900fb"; + +static int nuc900fb_probe(struct platform_device *pdev) +{ + struct nuc900fb_info *fbi; + struct nuc900fb_display *display; + struct fb_info *fbinfo; + struct nuc900fb_mach_info *mach_info; + struct resource *res; + int ret; + int irq; + int i; + int size; + + dev_dbg(&pdev->dev, "devinit\n"); + mach_info = dev_get_platdata(&pdev->dev); + if (mach_info == NULL) { + dev_err(&pdev->dev, + "no platform data for lcd, cannot attach\n"); + return -EINVAL; + } + + if (mach_info->default_display > mach_info->num_displays) { + dev_err(&pdev->dev, + "default display No. is %d but only %d displays \n", + mach_info->default_display, mach_info->num_displays); + return -EINVAL; + } + + + display = mach_info->displays + mach_info->default_display; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq for device\n"); + return -ENOENT; + } + + fbinfo = framebuffer_alloc(sizeof(struct nuc900fb_info), &pdev->dev); + if (!fbinfo) + return -ENOMEM; + + platform_set_drvdata(pdev, fbinfo); + + fbi = fbinfo->par; + fbi->dev = &pdev->dev; + +#ifdef CONFIG_CPU_NUC950 + fbi->drv_type = LCDDRV_NUC950; +#endif + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + size = resource_size(res); + fbi->mem = request_mem_region(res->start, size, pdev->name); + if (fbi->mem == NULL) { + dev_err(&pdev->dev, "failed to alloc memory region\n"); + ret = -ENOENT; + goto free_fb; + } + + fbi->io = ioremap(res->start, size); + if (fbi->io == NULL) { + dev_err(&pdev->dev, "ioremap() of lcd registers failed\n"); + ret = -ENXIO; + goto release_mem_region; + } + + fbi->irq_base = fbi->io + REG_LCM_INT_CS; + + + /* Stop the LCD */ + writel(0, fbi->io + REG_LCM_DCCS); + + /* fill the 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->var.nonstd = 0; + fbinfo->var.activate = FB_ACTIVATE_NOW; + fbinfo->var.accel_flags = 0; + fbinfo->var.vmode = FB_VMODE_NONINTERLACED; + fbinfo->fbops = &nuc900fb_ops; + fbinfo->flags = FBINFO_FLAG_DEFAULT; + fbinfo->pseudo_palette = &fbi->pseudo_pal; + + ret = request_irq(irq, nuc900fb_irqhandler, 0, pdev->name, fbi); + if (ret) { + dev_err(&pdev->dev, "cannot register irq handler %d -err %d\n", + irq, ret); + ret = -EBUSY; + goto release_regs; + } + + fbi->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(fbi->clk)) { + printk(KERN_ERR "nuc900-lcd:failed to get lcd clock source\n"); + ret = PTR_ERR(fbi->clk); + goto release_irq; + } + + clk_enable(fbi->clk); + dev_dbg(&pdev->dev, "got and enabled clock\n"); + + fbi->clk_rate = clk_get_rate(fbi->clk); + + /* calutate the video buffer size */ + for (i = 0; i < mach_info->num_displays; i++) { + unsigned long smem_len = mach_info->displays[i].xres; + smem_len *= mach_info->displays[i].yres; + smem_len *= mach_info->displays[i].bpp; + smem_len >>= 3; + if (fbinfo->fix.smem_len < smem_len) + fbinfo->fix.smem_len = smem_len; + } + + /* Initialize Video Memory */ + ret = nuc900fb_map_video_memory(fbinfo); + if (ret) { + printk(KERN_ERR "Failed to allocate video RAM: %x\n", ret); + goto release_clock; + } + + dev_dbg(&pdev->dev, "got video memory\n"); + + fbinfo->var.xres = display->xres; + fbinfo->var.yres = display->yres; + fbinfo->var.bits_per_pixel = display->bpp; + + nuc900fb_init_registers(fbinfo); + + nuc900fb_check_var(&fbinfo->var, fbinfo); + + ret = nuc900fb_cpufreq_register(fbi); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register cpufreq\n"); + goto free_video_memory; + } + + ret = register_framebuffer(fbinfo); + if (ret) { + printk(KERN_ERR "failed to register framebuffer device: %d\n", + ret); + goto free_cpufreq; + } + + fb_info(fbinfo, "%s frame buffer device\n", fbinfo->fix.id); + + return 0; + +free_cpufreq: + nuc900fb_cpufreq_deregister(fbi); +free_video_memory: + nuc900fb_unmap_video_memory(fbinfo); +release_clock: + clk_disable(fbi->clk); + clk_put(fbi->clk); +release_irq: + free_irq(irq, fbi); +release_regs: + iounmap(fbi->io); +release_mem_region: + release_mem_region(res->start, size); +free_fb: + framebuffer_release(fbinfo); + return ret; +} + +/* + * shutdown the lcd controller + */ +static void nuc900fb_stop_lcd(struct fb_info *info) +{ + struct nuc900fb_info *fbi = info->par; + void __iomem *regs = fbi->io; + + writel((~LCM_DCCS_DISP_INT_EN) | (~LCM_DCCS_VA_EN) | (~LCM_DCCS_OSD_EN), + regs + REG_LCM_DCCS); +} + +/* + * Cleanup + */ +static int nuc900fb_remove(struct platform_device *pdev) +{ + struct fb_info *fbinfo = platform_get_drvdata(pdev); + struct nuc900fb_info *fbi = fbinfo->par; + int irq; + + nuc900fb_stop_lcd(fbinfo); + msleep(1); + + unregister_framebuffer(fbinfo); + nuc900fb_cpufreq_deregister(fbi); + nuc900fb_unmap_video_memory(fbinfo); + + iounmap(fbi->io); + + irq = platform_get_irq(pdev, 0); + free_irq(irq, fbi); + + release_resource(fbi->mem); + kfree(fbi->mem); + + framebuffer_release(fbinfo); + + return 0; +} + +#ifdef CONFIG_PM + +/* + * suspend and resume support for the lcd controller + */ + +static int nuc900fb_suspend(struct platform_device *dev, pm_message_t state) +{ + struct fb_info *fbinfo = platform_get_drvdata(dev); + struct nuc900fb_info *info = fbinfo->par; + + nuc900fb_stop_lcd(fbinfo); + msleep(1); + clk_disable(info->clk); + return 0; +} + +static int nuc900fb_resume(struct platform_device *dev) +{ + struct fb_info *fbinfo = platform_get_drvdata(dev); + struct nuc900fb_info *fbi = fbinfo->par; + + printk(KERN_INFO "nuc900fb resume\n"); + + clk_enable(fbi->clk); + msleep(1); + + nuc900fb_init_registers(fbinfo); + nuc900fb_activate_var(fbinfo); + + return 0; +} + +#else +#define nuc900fb_suspend NULL +#define nuc900fb_resume NULL +#endif + +static struct platform_driver nuc900fb_driver = { + .probe = nuc900fb_probe, + .remove = nuc900fb_remove, + .suspend = nuc900fb_suspend, + .resume = nuc900fb_resume, + .driver = { + .name = "nuc900-lcd", + }, +}; + +module_platform_driver(nuc900fb_driver); + +MODULE_DESCRIPTION("Framebuffer driver for the NUC900"); +MODULE_LICENSE("GPL"); |