diff options
Diffstat (limited to 'target/linux/ubicom32/files/drivers/video/ubicom32plio80.c')
| -rw-r--r-- | target/linux/ubicom32/files/drivers/video/ubicom32plio80.c | 780 |
1 files changed, 0 insertions, 780 deletions
diff --git a/target/linux/ubicom32/files/drivers/video/ubicom32plio80.c b/target/linux/ubicom32/files/drivers/video/ubicom32plio80.c deleted file mode 100644 index 2e13fd7075..0000000000 --- a/target/linux/ubicom32/files/drivers/video/ubicom32plio80.c +++ /dev/null @@ -1,780 +0,0 @@ -/* - * drivers/video/ubicom32plio80.c - * Ubicom32 80 bus PLIO 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/>. - */ - -/* - * 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/interrupt.h> -#include <linux/dma-mapping.h> -#include <linux/platform_device.h> -#include <linux/device.h> -#include <linux/uaccess.h> -#include <asm/plio.h> - -#define DRIVER_NAME "ubicom32plio80" -#define DRIVER_DESCRIPTION "Ubicom32 80 bus PLIO 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_size, "VRAM size, in kilobytes to allocate, should be at least the size of one screen, subject to alignment"); - -static int xres = 240; -module_param(xres, int, 0); -MODULE_PARM_DESC(xres, "x (horizontal) resolution"); - -static int yres = 320; -module_param(yres, int, 0); -MODULE_PARM_DESC(yres, "y (vertical) resolution"); - -static int bgr = 0; -module_param(bgr, int, 0); -MODULE_PARM_DESC(bgr, "display is BGR (Blue is MSB)"); - -#define BITS_PER_PIXEL 16 - -/* - * Buffer alignment, must not be 0 - */ -#define UBICOM32PLIO80_ALIGNMENT 4 - -/* - * PLIO FSM - * 16-bit data bus on port I - * CS on EXTCTL[6] - * WR on EXTCTL[4] - */ -static const plio_fctl_t plio_fctl = { - .fctl0 = { - .ptif_port_mode = PLIO_PORT_MODE_DI, - .ptif_portd_cfg = 0, - .ptif_porti_cfg = 3, - .edif_ds = 6, - .edif_cmp_mode = 1, - .ecif_extclk_ena = 0, // enable clock output on PD7 table 2.65/p111 says extctl[0]? - .icif_clk_src_sel = PLIO_CLK_IO, - }, - .fctl2 = { - .icif_eclk_div = 10, - .icif_iclk_div = 10, - }, - - }; - - static const plio_config_t plio_config = { - .pfsm = { - /* - * Table 12.63 - */ - .grpsel[0] = {1,1,1,1,1,1,1,1,1,1}, - - /* - * Table 12.66 Counter load value - */ - .cs_lut[0] = {0,0,0,0,0,0,0,0}, - - /* - * Table 2.75 PLIO PFSM Configuration Registers - */ - // 3 2 1 0 - .extctl_o_lut[0] = {0x3f, 0x2f, 0x3f, 0x3f}, - // 7 6 5 4 - .extctl_o_lut[1] = {0x3f, 0x3f, 0x3f, 0x2f}, - }, - .edif = { - .odr_oe = 0xffff, - }, - .ecif = { - .output_ena = (1 << 6) | (1 << 4), - }, -}; - -static const u32_t ubicom32plio80_plio_fsm[] = { - // 0-F - 0x00070007, 0x00070007, - 0x00070007, 0x00070007, - 0x00070007, 0x00070007, - 0x00070007, 0x00070007, - - 0x16260806, 0x16260806, - 0x16260806, 0x16260806, - 0x16260806, 0x16260806, - 0x16260806, 0x16260806, - - // 10 - 1f - 0x22061806, 0x22061806, - 0x22061806, 0x22061806, - 0x22061806, 0x22061806, - 0x22061806, 0x22061806, - - 0x22061806, 0x22061806, - 0x22061806, 0x22061806, - 0x22061806, 0x22061806, - 0x22061806, 0x22061806, - - // 20 - 2f - 0x00070806, 0x00070806, - 0x00070806, 0x00070806, - 0x00070806, 0x00070806, - 0x00070806, 0x00070806, - - 0x00070806, 0x00070806, - 0x00070806, 0x00070806, - 0x00070806, 0x00070806, - 0x00070806, 0x00070806, -}; - -/* - * fb_fix_screeninfo defines the non-changeable properties of the VDC, depending on what mode it is in. - */ -static struct fb_fix_screeninfo ubicom32plio80_fix = { - .id = "Ubicom32", - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_TRUECOLOR, - .accel = FB_ACCEL_UBICOM32_PLIO80, -}; - -/* - * Filled in at probe time when we find out what the hardware supports - */ -static struct fb_var_screeninfo ubicom32plio80_var; - -/* - * Private data structure - */ -struct ubicom32plio80_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; - - /* - * Fake palette of 16 colors - */ - u32 pseudo_palette[PALETTE_ENTRIES_NO]; - - int irq_req; - - /* - * Current pointer and bytes left to transfer with the PLIO - */ - void *xfer_ptr; - u32 bytes_to_xfer; - u32 busy; -}; - -static struct platform_device *ubicom32plio80_platform_device; - -/* - * ubicom32plio80_isr - */ -static int ubicom32plio80_isr(int irq, void *appdata) -{ - struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)appdata; - - if (!ud->bytes_to_xfer) { - ubicom32_disable_interrupt(TX_FIFO_INT(PLIO_PORT)); - PLIO_NBR->intmask.txfifo_wm = 0; - ud->busy = 0; - return IRQ_HANDLED; - } - - asm volatile ( - ".rept 8 \n\t" - "move.4 (%[fifo]), (%[data])4++ \n\t" - ".endr \n\t" - : [data] "+a" (ud->xfer_ptr) - : [fifo] "a" (&PLIO_NBR->tx_lo) - ); - - ud->bytes_to_xfer -= 32; - - return IRQ_HANDLED; -} - -/* - * ubicom32plio80_update - */ -static void ubicom32plio80_update(struct ubicom32plio80_drvdata *ud, u32 *fb) -{ - struct ubicom32_io_port *ri = (struct ubicom32_io_port *)RI; - struct ubicom32_io_port *rd = (struct ubicom32_io_port *)RD; - - ud->xfer_ptr = fb; - ud->bytes_to_xfer = (xres * yres * 2) - 64; - ud->busy = 1; - - ri->gpio_mask = 0; - rd->gpio_mask &= ~((1 << 4) | (1 << 2)); - - *(u32 *)(&PLIO_NBR->intclr) = ~0; - PLIO_NBR->intmask.txfifo_wm = 1; - PLIO_NBR->fifo_wm.tx = 8; - ubicom32_enable_interrupt(TX_FIFO_INT(PLIO_PORT)); - - asm volatile ( - ".rept 16 \n\t" - "move.4 (%[fifo]), (%[data])4++ \n\t" - ".endr \n\t" - : [data] "+a" (ud->xfer_ptr) - : [fifo] "a" (&PLIO_NBR->tx_lo) - ); -} - -/* - * ubicom32plio80_pan_display - * Pans the display to a given location. Supports only y direction panning. - */ -static int ubicom32plio80_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi) -{ - struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_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); - - return 0; -} - -/* - * ubicom32plio80_setcolreg - * Sets a color in our virtual palette - */ -static int ubicom32plio80_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; -} - -/* - * ubicom32plio80_mmap - */ -static int ubicom32plio80_mmap(struct fb_info *info, struct vm_area_struct *vma) -{ - struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)info->par; - - vma->vm_start = (unsigned long)(ud->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; -} - -/* - * ubicom32plio80_check_var - * Check the var, tweak it but don't change operational parameters. - */ -static int ubicom32plio80_check_var(struct fb_var_screeninfo *var, struct fb_info *info) -{ - struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)info->par; - u32 line_size = var->xres * (BITS_PER_PIXEL / 8); - - /* - * See if we can handle this bpp - */ - if (var->bits_per_pixel > BITS_PER_PIXEL) { - return -EINVAL; - } - var->bits_per_pixel = BITS_PER_PIXEL; - - /* - * See if we have enough memory to handle this resolution - */ - if ((line_size * var->yres * BITS_PER_PIXEL / 8) > ud->total_vram_size) { - return -EINVAL; - } - - var->xres_virtual = var->xres; - var->yres_virtual = ud->total_vram_size / line_size; - - var->red.length = 5; - var->green.length = 6; - var->green.offset = 5; - var->blue.length = 5; - var->transp.offset = var->transp.length = 0; - - if (bgr) { - var->red.offset = 0; - var->blue.offset = 11; - } else { - var->red.offset = 11; - var->blue.offset = 0; - } - - var->nonstd = 0; - var->height = -1; - var->width = -1; - var->vmode = FB_VMODE_NONINTERLACED; - var->sync = 0; - - return 0; -} - -/* - * ubicom32plio80_set_par - * Set the video mode according to info->var - */ -static int ubicom32plio80_set_par(struct fb_info *info) -{ - /* - * Anything changed? - */ - if ((xres == info->var.xres) && (yres == info->var.yres)) { - return 0; - } - - /* - * Implement changes - */ - xres = info->var.xres; - yres = info->var.yres; - info->fix.visual = FB_VISUAL_TRUECOLOR; - info->fix.xpanstep = 0; - info->fix.ypanstep = 1; - info->fix.line_length = xres * (BITS_PER_PIXEL / 8); - - return 0; -} - -/* - * ubicom32plio80_ops - * List of supported operations - */ -static struct fb_ops ubicom32plio80_ops = -{ - .owner = THIS_MODULE, - .fb_pan_display = ubicom32plio80_pan_display, - .fb_setcolreg = ubicom32plio80_setcolreg, - .fb_mmap = ubicom32plio80_mmap, - .fb_check_var = ubicom32plio80_check_var, - .fb_set_par = ubicom32plio80_set_par, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -/* - * ubicom32plio80_release - */ -static int ubicom32plio80_release(struct device *dev) -{ - struct ubicom32plio80_drvdata *ud = dev_get_drvdata(dev); - - unregister_framebuffer(ud->fbinfo); - - if (ud->irq_req) { - free_irq(TX_FIFO_INT(PLIO_PORT), ud); - } - if (ud->cmap_alloc) { - fb_dealloc_cmap(&ud->fbinfo->cmap); - } - - if (ud->fb) { - kfree(ud->fb); - } - - framebuffer_release(ud->fbinfo); - dev_set_drvdata(dev, NULL); - - return 0; -} - -/* - * ubicom32plio80_platform_probe - */ -static int __init ubicom32plio80_platform_probe(struct platform_device *pdev) -{ - struct ubicom32plio80_drvdata *ud; - struct fb_info *fbinfo; - int rc; - size_t fbsize; - struct device *dev = &pdev->dev; - int offset; - - /* - * This is the minimum VRAM size - */ - fbsize = xres * yres * 2; - 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 ubicom32plio80_drvdata), &pdev->dev); - if (!fbinfo) { - dev_err(dev, "Not enough memory to allocate instance.\n"); - return -ENOMEM; - } - - /* - * Fill in our private data. - */ - ud = (struct ubicom32plio80_drvdata *)fbinfo->par; - ud->fbinfo = fbinfo; - dev_set_drvdata(dev, ud); - - /* - * Allocate and align the requested amount of VRAM - */ - ud->total_vram_size = (vram_size * 1024) + UBICOM32PLIO80_ALIGNMENT; - 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 & (UBICOM32PLIO80_ALIGNMENT - 1); - if (!offset) { - ud->fb_aligned = ud->fb; - } else { - offset = UBICOM32PLIO80_ALIGNMENT - offset; - ud->fb_aligned = ud->fb + offset; - } - - /* - * Clear the entire frame buffer - */ - memset(ud->fb_aligned, 0, vram_size * 1024); - - /* - * Fill in the fb_var_screeninfo structure - */ - memset(&ubicom32plio80_var, 0, sizeof(ubicom32plio80_var)); - ubicom32plio80_var.bits_per_pixel = BITS_PER_PIXEL; - ubicom32plio80_var.red.length = 5; - ubicom32plio80_var.green.length = 6; - ubicom32plio80_var.green.offset = 5; - ubicom32plio80_var.blue.length = 5; - ubicom32plio80_var.activate = FB_ACTIVATE_NOW; - - if (bgr) { - ubicom32plio80_var.red.offset = 0; - ubicom32plio80_var.blue.offset = 11; - } else { - ubicom32plio80_var.red.offset = 11; - ubicom32plio80_var.blue.offset = 0; - } - - /* - * Fill in the fb_info structure - */ - ud->fbinfo->device = dev; - ud->fbinfo->screen_base = (void *)ud->fb_aligned; - ud->fbinfo->fbops = &ubicom32plio80_ops; - ud->fbinfo->fix = ubicom32plio80_fix; - ud->fbinfo->fix.smem_start = (u32)ud->fb_aligned; - ud->fbinfo->fix.smem_len = vram_size * 1024; - ud->fbinfo->fix.line_length = xres * 2; - ud->fbinfo->fix.mmio_start = (u32)ud; - ud->fbinfo->fix.mmio_len = sizeof(struct ubicom32plio80_drvdata); - - /* - * 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 = ubicom32plio80_var; - ud->fbinfo->var.xres = xres; - ud->fbinfo->var.yres = yres; - - /* - * We cannot pan in the X direction, so xres_virtual is xres - * We can pan in the Y direction, so yres_virtual is vram_size / ud->fbinfo->fix.line_length - */ - ud->fbinfo->var.xres_virtual = xres; - ud->fbinfo->var.yres_virtual = (vram_size * 1024) / ud->fbinfo->fix.line_length; - - /* - * 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; - } - - /* - * request the PLIO IRQ - */ - rc = request_irq(TX_FIFO_INT(PLIO_PORT), ubicom32plio80_isr, IRQF_DISABLED, "ubicom32plio80", ud); - if (rc) { - dev_err(dev, "Could not request IRQ\n"); - goto fail; - } - ud->irq_req = 1; - - /* - * Clear any garbage out of the TX FIFOs (idif_txfifo_flush) - * - * cast through ubicom32_io_port to make sure the compiler does a word write - */ - ((struct ubicom32_io_port *)PLIO_NBR)->int_set = (1 << 18); - - /* - * Start up the state machine - */ - plio_init(&plio_fctl, &plio_config, (plio_sram_t *)ubicom32plio80_plio_fsm, sizeof(ubicom32plio80_plio_fsm)); - PLIO_NBR->fctl0.pfsm_cmd = 0; - - ubicom32plio80_update(ud, ud->fb_aligned); - - /* - * Tell the log we are here - */ - dev_info(dev, "fbaddr=%p align=%p, size=%uKB screen(%ux%u) virt(%ux%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); - - /* - * Success - */ - return 0; - -fail: - ubicom32plio80_release(dev); - return rc; -} - -/* - * ubicom32plio80_platform_remove - */ -static int ubicom32plio80_platform_remove(struct platform_device *pdev) -{ - dev_info(&(pdev->dev), "Ubicom32 FB Driver Remove\n"); - return ubicom32plio80_release(&pdev->dev); -} - -static struct platform_driver ubicom32plio80_platform_driver = { - .probe = ubicom32plio80_platform_probe, - .remove = ubicom32plio80_platform_remove, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; - -#ifndef MODULE -/* - * ubicom32plio80_setup - * Process kernel boot options - */ -static int __init ubicom32plio80_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, "vram_size=", 10)) { - vram_size = simple_strtoul(this_opt + 10, NULL, 0); - continue; - } - - if (!strncmp(this_opt, "bgr=", 4)) { - bgr = simple_strtoul(this_opt + 4, NULL, 0); - continue; - } - - if (!strncmp(this_opt, "xres=", 5)) { - xres = simple_strtoul(this_opt + 5, NULL, 0); - continue; - } - - if (!strncmp(this_opt, "yres=", 5)) { - yres = simple_strtoul(this_opt + 5, NULL, 0); - continue; - } - } - return 0; -} -#endif /* MODULE */ - -/* - * ubicom32plio80_init - */ -static int __devinit ubicom32plio80_init(void) -{ - int ret; - -#ifndef MODULE - /* - * Get kernel boot options (in 'video=ubicom32plio80:<options>') - */ - char *option = NULL; - - if (fb_get_options(DRIVER_NAME, &option)) { - return -ENODEV; - } - ubicom32plio80_setup(option); -#endif /* MODULE */ - - ret = platform_driver_register(&ubicom32plio80_platform_driver); - - if (!ret) { - ubicom32plio80_platform_device = platform_device_alloc(DRIVER_NAME, 0); - - if (ubicom32plio80_platform_device) - ret = platform_device_add(ubicom32plio80_platform_device); - else - ret = -ENOMEM; - - if (ret) { - platform_device_put(ubicom32plio80_platform_device); - platform_driver_unregister(&ubicom32plio80_platform_driver); - } - } - - return ret; -} -module_init(ubicom32plio80_init); - -/* - * ubicom32plio80_exit - */ -static void __exit ubicom32plio80_exit(void) -{ - platform_device_unregister(ubicom32plio80_platform_device); - platform_driver_unregister(&ubicom32plio80_platform_driver); -} -module_exit(ubicom32plio80_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Patrick Tjin <@ubicom.com>"); -MODULE_DESCRIPTION(DRIVER_DESCRIPTION); |