diff options
Diffstat (limited to 'target/linux/ubicom32/files/drivers/video/ubicom32fb.c')
| -rw-r--r-- | target/linux/ubicom32/files/drivers/video/ubicom32fb.c | 779 |
1 files changed, 0 insertions, 779 deletions
diff --git a/target/linux/ubicom32/files/drivers/video/ubicom32fb.c b/target/linux/ubicom32/files/drivers/video/ubicom32fb.c deleted file mode 100644 index 4193560f7..000000000 --- a/target/linux/ubicom32/files/drivers/video/ubicom32fb.c +++ /dev/null @@ -1,779 +0,0 @@ -/* - * drivers/video/ubicom32fb.c - * Ubicom32 frame buffer driver - * - * (C) Copyright 2009, Ubicom, Inc. - * - * This file is part of the Ubicom32 Linux Kernel Port. - * - * The Ubicom32 Linux Kernel Port 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. - * - * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, - * see <http://www.gnu.org/licenses/>. - * - * Ubicom32 implementation derived from (with many thanks): - * arch/m68knommu - * arch/blackfin - * arch/parisc - */ - -/* - * This driver was based on skeletonfb.c, Skeleton for a frame buffer device by - * Geert Uytterhoeven. - */ - -#include <linux/device.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/version.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/dma-mapping.h> -#include <linux/platform_device.h> -#include <linux/device.h> -#include <linux/uaccess.h> -#include <linux/interrupt.h> - -#include <asm/io.h> -#include <asm/ip5000.h> -#include <asm/vdc_tio.h> -#include <asm/ubicom32fb.h> - -#define DRIVER_NAME "ubicom32fb" -#define DRIVER_DESCRIPTION "Ubicom32 frame buffer driver" - -#define PALETTE_ENTRIES_NO 16 - -/* - * Option variables - * - * vram_size: VRAM size in kilobytes, subject to alignment - */ -static int vram_size = 0; -module_param(vram_size, int, 0); -MODULE_PARM_DESC(vram, "VRAM size, in kilobytes to allocate, should be at least the size of one screen, subject to alignment"); -static int init_value = 0; -module_param(init_value, int, 0); -MODULE_PARM_DESC(init, "Initial value of the framebuffer (16-bit number)."); - -/* - * fb_fix_screeninfo defines the non-changeable properties of the VDC, depending on what mode it is in. - */ -static struct fb_fix_screeninfo ubicom32fb_fix = { - .id = "Ubicom32", - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_TRUECOLOR, - .accel = FB_ACCEL_UBICOM32, -}; - -/* - * Filled in at probe time when we find out what the hardware supports - */ -static struct fb_var_screeninfo ubicom32fb_var; - -/* - * Private data structure - */ -struct ubicom32fb_drvdata { - struct fb_info *fbinfo; - bool cmap_alloc; - - /* - * The address of the framebuffer in memory - */ - void *fb; - void *fb_aligned; - - /* - * Total size of vram including alignment allowance - */ - u32 total_vram_size; - - /* - * Interrupt to set when changing registers - */ - u32 vp_int; - - /* - * Optional: Interrupt used by TIO to signal us - */ - u32 rx_int; - - /* - * Base address of the regs for VDC_TIO - */ - volatile struct vdc_tio_vp_regs *regs; - - /* - * non-zero if we are in yuv mode - */ - u8_t is_yuv; - - /* - * Fake palette of 16 colors - */ - u32 pseudo_palette[PALETTE_ENTRIES_NO]; - - /* - * Wait queue and lock used to block when we need to wait - * for something to happen. - */ - wait_queue_head_t waitq; - struct mutex lock; - -}; - -/* - * ubicom32fb_set_next_frame - * Sets the next frame buffer to display - * - * if sync is TRUE then this function will block until the hardware - * acknowledges the change - */ -static inline void ubicom32fb_set_next_frame(struct ubicom32fb_drvdata *ud, void *fb, u8_t sync) -{ - ud->regs->next_frame_flags = ud->is_yuv ? VDCTIO_NEXT_FRAME_FLAG_YUV : 0; - ud->regs->next_frame = (void *)((u32_t)fb | 1); - - /* - * If we have interrupts, then we can wait on it - */ - if (ud->rx_int != -1) { - DEFINE_WAIT(wait); - unsigned long flags; - - spin_lock_irqsave(&ud->lock, flags); - prepare_to_wait(&ud->waitq, &wait, TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&ud->lock, flags); - schedule(); - finish_wait(&ud->waitq, &wait); - return; - } - - /* - * No interrupt, we will just spin here - */ - while (sync && ((u32_t)ud->regs->next_frame & 1)); -} - -/* - * ubicom32fb_send_command - * Sends a command/data pair to the VDC - */ -static inline void ubicom32fb_send_command(struct ubicom32fb_drvdata *ud, u16 command, u8_t block) -{ - ud->regs->command = command; - ubicom32_set_interrupt(ud->vp_int); - while (block && ud->regs->command); -} - -/* - * ubicom32fb_ioctl - * Handles any ioctls sent to us - */ -static int ubicom32fb_ioctl(struct fb_info *fbi, unsigned int cmd, - unsigned long arg) -{ - struct ubicom32fb_drvdata *ud = (struct ubicom32fb_drvdata *)fbi->par; - void __user *argp = (void __user *)arg; - int retval = -EFAULT; - - switch (cmd) { - case UBICOM32FB_IOCTL_SET_NEXT_FRAME_SYNC: - // check alignment, return -EINVAL if necessary - ubicom32fb_set_next_frame(ud, argp, 1); - retval = 0; - break; - - case UBICOM32FB_IOCTL_SET_NEXT_FRAME: - // check alignment, return -EINVAL if necessary - ubicom32fb_set_next_frame(ud, argp, 0); - retval = 0; - break; - - case UBICOM32FB_IOCTL_SET_MODE: - if (!(ud->regs->caps & VDCTIO_CAPS_SUPPORTS_SCALING)) { - break; - } else { - struct ubicom32fb_mode mode; - volatile struct vdc_tio_vp_regs *regs = ud->regs; - u32_t flags = 0; - - if (copy_from_user(&mode, argp, sizeof(mode))) { - break; - } - - regs->x_in = mode.width; - regs->y_in = mode.height; - regs->x_out = regs->xres; - regs->y_out = regs->yres; - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_YUV_SCAN_ORDER) { - flags |= VDCTIO_SCALE_FLAG_YUV_SCAN_ORDER; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_YUV_BLOCK_ORDER) { - flags |= VDCTIO_SCALE_FLAG_YUV_BLOCK_ORDER; - } - ud->is_yuv = mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_YUV; - if (ud->is_yuv) { - flags |= VDCTIO_SCALE_FLAG_YUV; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_VRANGE_16_255) { - flags |= VDCTIO_SCALE_FLAG_VRANGE_16_255; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_VRANGE_0_255) { - flags |= VDCTIO_SCALE_FLAG_VRANGE_0_255; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_VSUB) { - flags |= VDCTIO_SCALE_FLAG_VSUB; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_HSUB_2_1) { - flags |= VDCTIO_SCALE_FLAG_HSUB_2_1; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_HSUB_1_1) { - flags |= VDCTIO_SCALE_FLAG_HSUB_1_1; - } - if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_SCALE_ENABLE) { - flags |= VDCTIO_SCALE_FLAG_ENABLE; - } - if (mode.next_frame) { - flags |= VDCTIO_SCALE_FLAG_SET_FRAME_BUFFER; - regs->next_frame = mode.next_frame; - } - - regs->scale_flags = flags; - ubicom32fb_send_command(ud, VDCTIO_COMMAND_SET_SCALE_MODE, 1); - retval = 0; - break; - } - - default: - retval = -ENOIOCTLCMD; - break; - } - - return retval; -} - -/* - * ubicom32fb_interrupt - * Called by the OS when the TIO has set the rx_int - */ -static irqreturn_t ubicom32fb_interrupt(int vec, void *appdata) -{ - struct ubicom32fb_drvdata *ud = (struct ubicom32fb_drvdata *)appdata; - - spin_lock(&ud->lock); - if (waitqueue_active(&ud->waitq)) { - wake_up(&ud->waitq); - } - spin_unlock(&ud->lock); - - return IRQ_HANDLED; -} - -/* - * ubicom32fb_pan_display - * Pans the display to a given location. Supports only y direction panning. - */ -static int ubicom32fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) -{ - struct ubicom32fb_drvdata *ud = (struct ubicom32fb_drvdata *)fbi->par; - void *new_addr; - - /* - * Get the last y line that would be displayed. Since we don't support YWRAP, - * it must be less than our virtual y size. - */ - u32 lasty = var->yoffset + var->yres; - if (lasty > fbi->var.yres_virtual) { - /* - * We would fall off the end of our frame buffer if we panned here. - */ - return -EINVAL; - } - - if (var->xoffset) { - /* - * We don't support panning in the x direction - */ - return -EINVAL; - } - - /* - * Everything looks sane, go ahead and pan - * - * We have to calculate a new address for the VDC to look at - */ - new_addr = ud->fb_aligned + (var->yoffset * fbi->fix.line_length); - - /* - * Send down the command. The buffer will switch at the next vertical blank - */ - ubicom32fb_set_next_frame(ud, (void *)new_addr, 0); - - return 0; -} - -/* - * ubicom32fb_setcolreg - * Sets a color in our virtual palette - */ -static int ubicom32fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi) -{ - u32 *palette = fbi->pseudo_palette; - - if (regno >= PALETTE_ENTRIES_NO) { - return -EINVAL; - } - - /* - * We only use 8 bits from each color - */ - red >>= 8; - green >>= 8; - blue >>= 8; - - /* - * Convert any grayscale values - */ - if (fbi->var.grayscale) { - u16 gray = red + green + blue; - gray += (gray >> 2) + (gray >> 3) - (gray >> 7); - gray >>= 2; - if (gray > 255) { - gray = 255; - } - red = gray; - blue = gray; - green = gray; - } - - palette[regno] = (red << fbi->var.red.offset) | (green << fbi->var.green.offset) | - (blue << fbi->var.blue.offset); - - return 0; -} - -/* - * ubicom32fb_mmap - */ -static int ubicom32fb_mmap(struct fb_info *info, struct vm_area_struct *vma) -{ - struct ubicom32fb_drvdata *drvdata = (struct ubicom32fb_drvdata *)info->par; - - vma->vm_start = (unsigned long)(drvdata->fb_aligned); - - 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 | VM_SHARED; - - return 0; -} - -/* - * ubicom32fb_blank - */ -static int ubicom32fb_blank(int blank_mode, struct fb_info *fbi) -{ - return 0; -#if 0 - struct ubicom32fb_drvdata *drvdata = to_ubicom32fb_drvdata(fbi); - - switch (blank_mode) { - case FB_BLANK_UNBLANK: - /* turn on panel */ - ubicom32fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default); - break; - - case FB_BLANK_NORMAL: - case FB_BLANK_VSYNC_SUSPEND: - case FB_BLANK_HSYNC_SUSPEND: - case FB_BLANK_POWERDOWN: - /* turn off panel */ - ubicom32fb_out_be32(drvdata, REG_CTRL, 0); - default: - break; - - } - return 0; /* success */ -#endif -} - -static struct fb_ops ubicom32fb_ops = -{ - .owner = THIS_MODULE, - .fb_pan_display = ubicom32fb_pan_display, - .fb_setcolreg = ubicom32fb_setcolreg, - .fb_blank = ubicom32fb_blank, - .fb_mmap = ubicom32fb_mmap, - .fb_ioctl = ubicom32fb_ioctl, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -/* - * ubicom32fb_release - */ -static int ubicom32fb_release(struct device *dev) -{ - struct ubicom32fb_drvdata *ud = dev_get_drvdata(dev); - -#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) - //ubicom32fb_blank(VESA_POWERDOWN, &drvdata->info); -#endif - - unregister_framebuffer(ud->fbinfo); - - if (ud->cmap_alloc) { - fb_dealloc_cmap(&ud->fbinfo->cmap); - } - - if (ud->fb) { - kfree(ud->fb); - } - - if (ud->rx_int != -1) { - free_irq(ud->rx_int, ud); - } - - /* - * Turn off the display - */ - //ubicom32fb_out_be32(drvdata, REG_CTRL, 0); - //iounmap(drvdata->regs); - - framebuffer_release(ud->fbinfo); - dev_set_drvdata(dev, NULL); - - return 0; -} - -/* - * ubicom32fb_platform_probe - */ -static int __init ubicom32fb_platform_probe(struct platform_device *pdev) -{ - struct ubicom32fb_drvdata *ud; - struct resource *irq_resource_rx; - struct resource *irq_resource_tx; - struct resource *mem_resource; - struct fb_info *fbinfo; - int rc; - size_t fbsize; - struct device *dev = &pdev->dev; - int offset; - struct vdc_tio_vp_regs *regs; - - /* - * Get our resources - */ - irq_resource_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq_resource_tx) { - dev_err(dev, "No tx IRQ resource assigned\n"); - return -ENODEV; - } - - irq_resource_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1); - if (!irq_resource_rx) { - dev_err(dev, "No rx IRQ resource assigned\n"); - return -ENODEV; - } - - mem_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem_resource || !mem_resource->start) { - dev_err(dev, "No mem resource assigned\n"); - return -ENODEV; - } - regs = (struct vdc_tio_vp_regs *)mem_resource->start; - if (regs->version != VDCTIO_VP_VERSION) { - dev_err(dev, "VDCTIO is not compatible with this driver tio:%x drv:%x\n", - regs->version, VDCTIO_VP_VERSION); - return -ENODEV; - } - - /* - * This is the minimum VRAM size - */ - fbsize = regs->xres * regs->yres * (regs->bpp / 8); - if (!vram_size) { - vram_size = (fbsize + 1023) / 1024; - } else { - if (fbsize > (vram_size * 1024)) { - dev_err(dev, "Not enough VRAM for display, need >= %u bytes\n", fbsize); - return -ENOMEM; // should be ebadparam? - } - } - - /* - * Allocate the framebuffer instance + our private data - */ - fbinfo = framebuffer_alloc(sizeof(struct ubicom32fb_drvdata), &pdev->dev); - if (!fbinfo) { - dev_err(dev, "Not enough memory to allocate instance.\n"); - return -ENOMEM; - } - - /* - * Fill in our private data. - */ - ud = (struct ubicom32fb_drvdata *)fbinfo->par; - ud->fbinfo = fbinfo; - ud->regs = (struct vdc_tio_vp_regs *)(mem_resource->start); - dev_set_drvdata(dev, ud); - - ud->vp_int = irq_resource_tx->start; - - /* - * If we were provided an rx_irq then we need to init the appropriate - * queues, locks, and functions. - */ - ud->rx_int = -1; - if (irq_resource_rx->start != DEVTREE_IRQ_NONE) { - init_waitqueue_head(&ud->waitq); - mutex_init(&ud->lock); - if (request_irq(ud->rx_int, ubicom32fb_interrupt, IRQF_SHARED, "ubicom32fb_rx", ud)) { - dev_err(dev, "Couldn't request rx IRQ\n"); - rc = -ENOMEM; - goto fail; - } - ud->rx_int = irq_resource_rx->start; - } - - /* - * Allocate and align the requested amount of VRAM - */ - ud->total_vram_size = (vram_size * 1024) + regs->fb_align; - ud->fb = kmalloc(ud->total_vram_size, GFP_KERNEL); - if (ud->fb == NULL) { - dev_err(dev, "Couldn't allocate VRAM\n"); - rc = -ENOMEM; - goto fail; - } - - offset = (u32_t)ud->fb & (regs->fb_align - 1); - if (!offset) { - ud->fb_aligned = ud->fb; - } else { - offset = regs->fb_align - offset; - ud->fb_aligned = ud->fb + offset; - } - - /* - * Clear the entire frame buffer - */ - if (!init_value) { - memset(ud->fb_aligned, 0, vram_size * 1024); - } else { - unsigned short *p = ud->fb_aligned; - int i; - for (i = 0; i < ((vram_size * 1024) / sizeof(u16_t)); i++) { - *p++ = init_value; - } - } - - /* - * Fill in the fb_var_screeninfo structure - */ - memset(&ubicom32fb_var, 0, sizeof(ubicom32fb_var)); - ubicom32fb_var.bits_per_pixel = regs->bpp; - ubicom32fb_var.red.offset = regs->rshift; - ubicom32fb_var.green.offset = regs->gshift; - ubicom32fb_var.blue.offset = regs->bshift; - ubicom32fb_var.red.length = regs->rbits; - ubicom32fb_var.green.length = regs->gbits; - ubicom32fb_var.blue.length = regs->bbits; - ubicom32fb_var.activate = FB_ACTIVATE_NOW; - -#if 0 - /* - * Turn on the display - */ - ud->reg_ctrl_default = REG_CTRL_ENABLE; - if (regs->rotate_screen) - ud->reg_ctrl_default |= REG_CTRL_ROTATE; - ubicom32fb_out_be32(ud, REG_CTRL, ud->reg_ctrl_default); -#endif - - /* - * Fill in the fb_info structure - */ - ud->fbinfo->device = dev; - ud->fbinfo->screen_base = (void *)ud->fb_aligned; - ud->fbinfo->fbops = &ubicom32fb_ops; - ud->fbinfo->fix = ubicom32fb_fix; - ud->fbinfo->fix.smem_start = (u32)ud->fb_aligned; - ud->fbinfo->fix.smem_len = vram_size * 1024; - ud->fbinfo->fix.line_length = regs->xres * (regs->bpp / 8); - ud->fbinfo->fix.mmio_start = (u32)regs; - ud->fbinfo->fix.mmio_len = sizeof(struct vdc_tio_vp_regs); - - /* - * We support panning in the y direction only - */ - ud->fbinfo->fix.xpanstep = 0; - ud->fbinfo->fix.ypanstep = 1; - - ud->fbinfo->pseudo_palette = ud->pseudo_palette; - ud->fbinfo->flags = FBINFO_DEFAULT; - ud->fbinfo->var = ubicom32fb_var; - ud->fbinfo->var.xres = regs->xres; - ud->fbinfo->var.yres = regs->yres; - - /* - * We cannot pan in the X direction, so xres_virtual is regs->xres - * We can pan in the Y direction, so yres_virtual is vram_size / ud->fbinfo->fix.line_length - */ - ud->fbinfo->var.xres_virtual = regs->xres; - ud->fbinfo->var.yres_virtual = (vram_size * 1024) / ud->fbinfo->fix.line_length; - - //ud->fbinfo->var.height = regs->height_mm; - //ud->fbinfo->var.width = regs->width_mm; - - /* - * Allocate a color map - */ - rc = fb_alloc_cmap(&ud->fbinfo->cmap, PALETTE_ENTRIES_NO, 0); - if (rc) { - dev_err(dev, "Fail to allocate colormap (%d entries)\n", - PALETTE_ENTRIES_NO); - goto fail; - } - ud->cmap_alloc = true; - - /* - * Register new frame buffer - */ - rc = register_framebuffer(ud->fbinfo); - if (rc) { - dev_err(dev, "Could not register frame buffer\n"); - goto fail; - } - - /* - * Start up the VDC - */ - ud->regs->next_frame = ud->fb; - ubicom32fb_send_command(ud, VDCTIO_COMMAND_START, 0); - - /* - * Tell the log we are here - */ - dev_info(dev, "fbaddr=%p align=%p, size=%uKB screen(%ux%u) virt(%ux%u), regs=%p irqtx=%u irqrx=%u\n", - ud->fb, ud->fb_aligned, vram_size, ud->fbinfo->var.xres, ud->fbinfo->var.yres, - ud->fbinfo->var.xres_virtual, ud->fbinfo->var.yres_virtual, ud->regs, - irq_resource_tx->start, irq_resource_rx->start); - - /* - * Success - */ - return 0; - -fail: - ubicom32fb_release(dev); - return rc; -} - -/* - * ubicom32fb_platform_remove - */ -static int ubicom32fb_platform_remove(struct platform_device *pdev) -{ - dev_info(&(pdev->dev), "Ubicom32 FB Driver Remove\n"); - return ubicom32fb_release(&pdev->dev); -} - -static struct platform_driver ubicom32fb_platform_driver = { - .probe = ubicom32fb_platform_probe, - .remove = ubicom32fb_platform_remove, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; - -#ifndef MODULE -/* - * ubicom32fb_setup - * Process kernel boot options - */ -static int __init ubicom32fb_setup(char *options) -{ - char *this_opt; - - if (!options || !*options) { - return 0; - } - - while ((this_opt = strsep(&options, ",")) != NULL) { - if (!*this_opt) { - continue; - } - - if (!strncmp(this_opt, "init_value=", 10)) { - init_value = simple_strtoul(this_opt + 11, NULL, 0); - continue; - } - - if (!strncmp(this_opt, "vram_size=", 10)) { - vram_size = simple_strtoul(this_opt + 10, NULL, 0); - continue; - } - } - return 0; -} -#endif /* MODULE */ - -/* - * ubicom32fb_init - */ -static int __devinit ubicom32fb_init(void) -{ -#ifndef MODULE - /* - * Get kernel boot options (in 'video=ubicom32fb:<options>') - */ - char *option = NULL; - - if (fb_get_options(DRIVER_NAME, &option)) { - return -ENODEV; - } - ubicom32fb_setup(option); -#endif /* MODULE */ - - return platform_driver_register(&ubicom32fb_platform_driver); -} -module_init(ubicom32fb_init); - -/* - * ubicom32fb_exit - */ -static void __exit ubicom32fb_exit(void) -{ - platform_driver_unregister(&ubicom32fb_platform_driver); -} -module_exit(ubicom32fb_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Patrick Tjin <@ubicom.com>"); -MODULE_DESCRIPTION(DRIVER_DESCRIPTION); |