Index: linux-2.6.22-source/drivers/video/covideo.c =================================================================== --- /dev/null +++ linux-2.6.22-source/drivers/video/covideo.c @@ -0,0 +1,589 @@ + +#include +#include +#include + +#include +#include +#include + +#include + +#include + +MODULE_AUTHOR("Steve Shoecraft "); +MODULE_DESCRIPTION("Cooperative Linux Video Driver"); +MODULE_LICENSE("GPL"); + +#define COVIDEO_DEBUG 0 +#define COVIDEO_MEMTEST 0 + +#if COVIDEO_DEBUG +#define dprintk(m) printk m +#else +#define dprintk(m) /* noop */ +#endif + +/* Our info */ +struct covideo_par { + int unit; + void *buffer; + int size; + struct pci_dev *pdev; + struct mutex open_lock; +}; +typedef struct covideo_par covideo_par_t; + +static void uprintk(int unit, char *fmt, ...) { + char line[1024],*p; + va_list ap; + + sprintf(line,"covideo%d: ", unit); + p = line + strlen(line); + + va_start(ap,fmt); + vsprintf(p,fmt,ap); + va_end(ap); +} + +static struct fb_var_screeninfo covideo_default = { + .xres = 640, + .yres = 480, + .xres_virtual = 640, + .yres_virtual = 480, + .bits_per_pixel = 8, + .red = { 0, 8, 0 }, + .green = { 0, 8, 0 }, + .blue = { 0, 8, 0 }, + .activate = FB_ACTIVATE_TEST, + .height = -1, + .width = -1, + .pixclock = 20000, + .left_margin = 64, + .right_margin = 64, + .upper_margin = 32, + .lower_margin = 32, + .hsync_len = 64, + .vsync_len = 2, + .vmode = FB_VMODE_NONINTERLACED, +}; + +static struct fb_fix_screeninfo covideo_fix = { + .id = "CoVideo", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_PSEUDOCOLOR, + .xpanstep = 1, + .ypanstep = 1, + .ywrapstep = 1, + .accel = FB_ACCEL_NONE, +}; + +static int covideo_open(struct fb_info *info, int user) +{ + covideo_par_t *par = info->par; + + printk(KERN_INFO "covideo%d: open: user: %d\n", par->unit, user); + return 0; +} + +static int covideo_release(struct fb_info *info, int user) +{ + covideo_par_t *par = info->par; + + printk(KERN_INFO "covideo%d: close: user: %d\n", par->unit, user); + return 0; +} + +static u_long get_line_length(int xres_virtual, int bpp) +{ + u_long length; + + length = xres_virtual * bpp; + length = (length + 31) & ~31; + length >>= 3; + return (length); +} + +static int covideo_check_var(struct fb_var_screeninfo *var, struct fb_info *info) +{ + struct covideo_par *par = info->par; + u_long line_length; + +// uprintk("checking var...\n"); + +// printk("check_var: xres: %d, yres: %d, bpp: %d\n", var->xres, var->yres, var->bits_per_pixel); + + /* We only do 32 BPP */ +// if (var->bits_per_pixel != 32) return -EINVAL; + + /* + * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal! + * as FB_VMODE_SMOOTH_XPAN is only used internally + */ + if (var->vmode & FB_VMODE_CONUPDATE) { + var->vmode |= FB_VMODE_YWRAP; + var->xoffset = info->var.xoffset; + var->yoffset = info->var.yoffset; + } + + /* + * Some very basic checks + */ + if (!var->xres) + var->xres = 1; + if (!var->yres) + var->yres = 1; + if (var->xres > var->xres_virtual) + var->xres_virtual = var->xres; + if (var->yres > var->yres_virtual) + var->yres_virtual = var->yres; + if (var->bits_per_pixel <= 1) + var->bits_per_pixel = 1; + else if (var->bits_per_pixel <= 8) + var->bits_per_pixel = 8; + else if (var->bits_per_pixel <= 16) + var->bits_per_pixel = 16; + else if (var->bits_per_pixel <= 24) + var->bits_per_pixel = 24; + else if (var->bits_per_pixel <= 32) + var->bits_per_pixel = 32; + else + return -EINVAL; + + if (var->xres_virtual < var->xoffset + var->xres) + var->xres_virtual = var->xoffset + var->xres; + if (var->yres_virtual < var->yoffset + var->yres) + var->yres_virtual = var->yoffset + var->yres; + + line_length = + get_line_length(var->xres_virtual, var->bits_per_pixel); + if (line_length * var->yres_virtual > par->size) + return -ENOMEM; + + /* + * Now that we checked it we alter var. The reason being is that the video + * mode passed in might not work but slight changes to it might make it + * work. This way we let the user know what is acceptable. + */ + switch (var->bits_per_pixel) { + case 1: + case 8: + var->red.offset = 0; + var->red.length = 8; + var->green.offset = 0; + var->green.length = 8; + var->blue.offset = 0; + var->blue.length = 8; + var->transp.offset = 0; + var->transp.length = 0; + break; + case 16: /* RGBA 5551 */ + if (var->transp.length) { + var->red.offset = 0; + var->red.length = 5; + var->green.offset = 5; + var->green.length = 5; + var->blue.offset = 10; + var->blue.length = 5; + var->transp.offset = 15; + var->transp.length = 1; + } else { /* RGB 565 */ + var->red.offset = 0; + var->red.length = 5; + var->green.offset = 5; + var->green.length = 6; + var->blue.offset = 11; + var->blue.length = 5; + var->transp.offset = 0; + var->transp.length = 0; + } + break; + case 24: /* RGB 888 */ + var->red.offset = 0; + var->red.length = 8; + var->green.offset = 8; + var->green.length = 8; + var->blue.offset = 16; + var->blue.length = 8; + var->transp.offset = 0; + var->transp.length = 0; + break; + case 32: /* RGBA 8888 */ + var->red.offset = 0; + var->red.length = 8; + var->green.offset = 8; + var->green.length = 8; + var->blue.offset = 16; + var->blue.length = 8; + var->transp.offset = 24; + var->transp.length = 8; + break; + } + var->red.msb_right = 0; + var->green.msb_right = 0; + var->blue.msb_right = 0; + var->transp.msb_right = 0; + + return 0; +} + +static int covideo_set_par(struct fb_info *info) +{ +// struct covideo_par *par = info->par; + +// uprintk(par->unit, "setting par...\n"); + + printk("set_par: xres: %d, yres: %d, bpp: %d\n", info->var.xres, info->var.yres, info->var.bits_per_pixel); + info->fix.line_length = get_line_length(info->var.xres_virtual, info->var.bits_per_pixel); + return 0; +} + +static int covideo_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info) +{ + struct covideo_par *par = info->par; + + uprintk(par->unit, "setting coloreg...\n"); + + if (regno >= 256) /* no. of hw registers */ + return 1; + /* + * Program hardware... do anything you want with transp + */ + + /* grayscale works only partially under directcolor */ + if (info->var.grayscale) { + /* grayscale = 0.30*R + 0.59*G + 0.11*B */ + red = green = blue = + (red * 77 + green * 151 + blue * 28) >> 8; + } + + /* Directcolor: + * var->{color}.offset contains start of bitfield + * var->{color}.length contains length of bitfield + * {hardwarespecific} contains width of RAMDAC + * cmap[X] is programmed to (X << red.offset) | (X << green.offset) | (X << blue.offset) + * RAMDAC[X] is programmed to (red, green, blue) + * + * Pseudocolor: + * uses offset = 0 && length = RAMDAC register width. + * var->{color}.offset is 0 + * var->{color}.length contains widht of DAC + * cmap is not used + * RAMDAC[X] is programmed to (red, green, blue) + * Truecolor: + * does not use DAC. Usually 3 are present. + * var->{color}.offset contains start of bitfield + * var->{color}.length contains length of bitfield + * cmap is programmed to (red << red.offset) | (green << green.offset) | + * (blue << blue.offset) | (transp << transp.offset) + * RAMDAC does not exist + */ +#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16) + switch (info->fix.visual) { + case FB_VISUAL_TRUECOLOR: + case FB_VISUAL_PSEUDOCOLOR: + red = CNVT_TOHW(red, info->var.red.length); + green = CNVT_TOHW(green, info->var.green.length); + blue = CNVT_TOHW(blue, info->var.blue.length); + transp = CNVT_TOHW(transp, info->var.transp.length); + break; + case FB_VISUAL_DIRECTCOLOR: + red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */ + green = CNVT_TOHW(green, 8); + blue = CNVT_TOHW(blue, 8); + /* hey, there is bug in transp handling... */ + transp = CNVT_TOHW(transp, 8); + break; + } +#undef CNVT_TOHW + /* Truecolor has hardware independent palette */ + if (info->fix.visual == FB_VISUAL_TRUECOLOR) { + u32 v; + + if (regno >= 16) + return 1; + + v = (red << info->var.red.offset) | + (green << info->var.green.offset) | + (blue << info->var.blue.offset) | + (transp << info->var.transp.offset); + switch (info->var.bits_per_pixel) { + case 8: + break; + case 16: + ((u32 *) (info->pseudo_palette))[regno] = v; + break; + case 24: + case 32: + ((u32 *) (info->pseudo_palette))[regno] = v; + break; + } + } + + return 0; +} + +static int covideo_blank(int blank_mode, struct fb_info *info) +{ + return 0; +} + +static int covideo_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + unsigned long start = vma->vm_start; + unsigned long size = vma->vm_end-vma->vm_start; + unsigned long page, pos; + + if (size > info->screen_size) return -EINVAL; + + pos = (unsigned long) info->screen_base; + while (size > 0) { + page = vmalloc_to_pfn((void *)pos); + if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) + return -EAGAIN; + + start += PAGE_SIZE; + pos += PAGE_SIZE; + if (size > PAGE_SIZE) + size -= PAGE_SIZE; + else + size = 0; + } + + return 0; +} + +/* Frame buffer operations */ +static struct fb_ops covideo_ops = { + .owner = THIS_MODULE, + .fb_open = covideo_open, + .fb_release = covideo_release, + .fb_read = fb_sys_read, + .fb_write = fb_sys_write, + .fb_check_var = covideo_check_var, + .fb_set_par = covideo_set_par, + .fb_setcolreg = covideo_setcolreg, + .fb_blank = covideo_blank, + .fb_fillrect = sys_fillrect, + .fb_copyarea = sys_copyarea, + .fb_imageblit = sys_imageblit, + .fb_mmap = covideo_mmap, + +#if 0 + /* XXX currently not implemented */ + .fb_setcmap = covideo_setcmap, + .fb_pan_display = covideo_pan_display, + .fb_cursor = covideo_cursor, + .fb_rotate = covideo_rotate, + .fb_get_caps = svga_get_caps, +#endif +}; + +#if COVIDEO_MEMTEST +/* Simple page-level checkerboard test */ +static int test_buffer(void *buffer, int unit, int size) { + unsigned char *p, *t, *t0, *t1; + unsigned long flags; + int npages,rc; + register int i; + + printk(KERN_INFO "covideo%d: testing buffer at 0x%p (size: %d)\n", unit, buffer, size); + rc = 1; + t1 = 0; + if ((t0 = kmalloc(PAGE_SIZE, GFP_KERNEL)) == 0) goto test_out; + memset(t0, 0, PAGE_SIZE); + if ((t1 = kmalloc(PAGE_SIZE, GFP_KERNEL)) == 0) goto test_out; + memset(t1, 0xFF, PAGE_SIZE); + npages = size >> PAGE_SHIFT; + + p = buffer; + for(i=0; i < npages; i++) { + t = (i & 1 ? t1 : t0); + memcpy(p, t, PAGE_SIZE); + p += PAGE_SIZE; + } + + co_passage_page_assert_valid(); + co_passage_page_acquire(&flags); + co_passage_page->operation = CO_OPERATION_DEVICE; + co_passage_page->params[0] = CO_DEVICE_VIDEO; + co_passage_page->params[1] = CO_VIDEO_TEST; + co_passage_page->params[2] = unit; + co_switch_wrapper(); + rc = co_passage_page->params[0]; + co_passage_page_release(flags); + + /* Fail on host side? */ + if (rc) goto test_out; + + p = buffer; + for(i=0; i < npages; i++) { + t = (i & 1 ? t0 : t1); + if (memcmp(p, t, PAGE_SIZE) != 0) + goto test_out; + p += PAGE_SIZE; + } + + rc = 0; + +test_out: + if (t0) kfree(t0); + if (t1) kfree(t1); + printk(KERN_INFO "covideo%d: test %s!\n", unit, (rc ? "failed" : "passed")); + return rc; +} +#endif + +/* + * PCI Probe - probe for a single device +*/ +static int __devinit covideo_pci_probe( struct pci_dev *pdev, const struct pci_device_id *id ) +{ + unsigned long flags; + covideo_config_t *cp; + struct fb_info *info; + covideo_par_t *par; + void *host_buffer, *buffer; + u8 unit; + int rc, size; + + /* Get our host unit */ + pci_read_config_byte(pdev, PCI_CO_UNIT, &unit); + + /* Get our config */ + co_passage_page_assert_valid(); + co_passage_page_acquire(&flags); + co_passage_page->operation = CO_OPERATION_DEVICE; + co_passage_page->params[0] = CO_DEVICE_VIDEO; + co_passage_page->params[1] = CO_VIDEO_GET_CONFIG; + co_passage_page->params[2] = unit; + co_switch_wrapper(); + rc = co_passage_page->params[0]; + cp = (covideo_config_t *) &co_passage_page->params[1]; + host_buffer = cp->buffer; + size = cp->size; + co_passage_page_release(flags); + + /* If unable to get size, silently skip this device */ + if (rc) return 0; + + /* Map host buffer into our space */ + buffer = co_map_buffer(host_buffer, size); + if (!buffer) { + printk(KERN_ERR "covideo%d: unable to map video buffer!\n", unit); + return 0; + } + +#if COVIDEO_DEBUG + printk(KERN_INFO "covideo%d: buffer: %p, size: %d\n", unit, buffer, size); +#endif + +#if COVIDEO_MEMTEST + /* Test buffer */ + if (test_buffer(buffer, unit, size)) return -EIO; +#endif + + /* Allocate and fill driver data structure */ + info = framebuffer_alloc(sizeof(covideo_par_t), &pdev->dev); + if (!info) { + printk(KERN_ERR "covideo%d: framebuffer alloc failed!!", unit); + return -ENOMEM; + } + + /* Need to set the base and ops before find_mode */ + info->screen_base = (char __iomem *)buffer; + info->screen_size = size; + info->fbops = &covideo_ops; + +#if COVIDEO_DEBUG + printk(KERN_INFO "covideo%d: calling find_mode...\n", unit); +#endif + rc = fb_find_mode(&info->var, info, NULL, NULL, 0, NULL, 8); + if (!rc || (rc == 4)) info->var = covideo_default; + + info->fix = covideo_fix; + info->fix.smem_start = (unsigned long) buffer; + info->fix.smem_len = size; + info->pseudo_palette = NULL; + info->flags = FBINFO_FLAG_DEFAULT; + + rc = fb_alloc_cmap(&info->cmap, 256, 0); + if (rc < 0) goto err1; + + rc = register_framebuffer(info); + if (rc < 0) goto err2; + + par = info->par; + par->pdev = pdev; + par->unit = unit; + par->buffer = buffer; + par->size = size; + mutex_init(&par->open_lock); + + printk(KERN_INFO "fb%d: Cooperative video at: %p, size: %dK\n", info->node, + buffer, size >> 10); + + pci_set_drvdata(pdev, info); + return 0; + +err2: + fb_dealloc_cmap(&info->cmap); + +err1: + framebuffer_release(info); + + return 0; +} + + +/* + * PCI Remove - hotplug removal +*/ +static void __devexit covideo_pci_remove(struct pci_dev *pdev) +{ + pci_set_drvdata(pdev, NULL); +} + +static struct pci_device_id covideo_pci_ids[] __devinitdata = { + { PCI_DEVICE(PCI_VENDOR_ID_CO, PCI_DEVICE_ID_COVIDEO) }, + { 0 } +}; + +static struct pci_driver covideo_pci_driver = { + .name = "covideo", + .id_table = covideo_pci_ids, + .probe = covideo_pci_probe, + .remove = __devexit_p(covideo_pci_remove), +}; + +extern int coio_test(void); + +/* + * PCI Init - module load +*/ +static int __init covideo_pci_init(void) { +#if 0 + rc = request_irq(VIDEO_IRQ, &covideo_isr, IRQF_SAMPLE_RANDOM, "covideo", NULL); + if (rc) { + printk(KERN_ERR "covideo_pci_init: unable to get irq %d", VIDEO_IRQ); + return rc; + } +#endif +#if COVIDEO_DEBUG + printk(KERN_INFO "covideo_pci_init: registering...\n"); +#endif + return pci_register_driver(&covideo_pci_driver); +} + +/* + * PCI Exit - module unload +*/ +static void __exit covideo_pci_exit(void) { +#if COVIDEO_DEBUG + printk(KERN_INFO "covideo_pci_exit: exiting\n"); +#endif + pci_unregister_driver(&covideo_pci_driver); +} + +module_init(covideo_pci_init); +module_exit(covideo_pci_exit); Index: linux-2.6.22-source/include/linux/covideo.h =================================================================== --- /dev/null +++ linux-2.6.22-source/include/linux/covideo.h @@ -0,0 +1,17 @@ + +#ifndef _LINUX_COVIDEO_H_ +#define _LINUX_COVIDEO_H_ + +enum CO_VIDEO_FUNC { + CO_VIDEO_GET_CONFIG, + CO_VIDEO_TEST, +}; + +struct covideo_config { + void *buffer; + int size; +}; + +typedef struct covideo_config covideo_config_t; + +#endif