diff options
Diffstat (limited to 'drivers/video/fbdev/cg14.c')
| -rw-r--r-- | drivers/video/fbdev/cg14.c | 622 |
1 files changed, 622 insertions, 0 deletions
diff --git a/drivers/video/fbdev/cg14.c b/drivers/video/fbdev/cg14.c new file mode 100644 index 0000000000..c0336c051c --- /dev/null +++ b/drivers/video/fbdev/cg14.c @@ -0,0 +1,622 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* cg14.c: CGFOURTEEN frame buffer driver + * + * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net) + * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz) + * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx) + * + * Driver layout based loosely on tgafb.c, see that file for credits. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/fb.h> +#include <linux/mm.h> +#include <linux/uaccess.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +#include <asm/io.h> +#include <asm/fbio.h> + +#include "sbuslib.h" + +/* + * Local functions. + */ + +static int cg14_setcolreg(unsigned, unsigned, unsigned, unsigned, + unsigned, struct fb_info *); + +static int cg14_mmap(struct fb_info *, struct vm_area_struct *); +static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long); +static int cg14_pan_display(struct fb_var_screeninfo *, struct fb_info *); + +/* + * Frame buffer operations + */ + +static const struct fb_ops cg14_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = cg14_setcolreg, + .fb_pan_display = cg14_pan_display, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_mmap = cg14_mmap, + .fb_ioctl = cg14_ioctl, +#ifdef CONFIG_COMPAT + .fb_compat_ioctl = sbusfb_compat_ioctl, +#endif +}; + +#define CG14_MCR_INTENABLE_SHIFT 7 +#define CG14_MCR_INTENABLE_MASK 0x80 +#define CG14_MCR_VIDENABLE_SHIFT 6 +#define CG14_MCR_VIDENABLE_MASK 0x40 +#define CG14_MCR_PIXMODE_SHIFT 4 +#define CG14_MCR_PIXMODE_MASK 0x30 +#define CG14_MCR_TMR_SHIFT 2 +#define CG14_MCR_TMR_MASK 0x0c +#define CG14_MCR_TMENABLE_SHIFT 1 +#define CG14_MCR_TMENABLE_MASK 0x02 +#define CG14_MCR_RESET_SHIFT 0 +#define CG14_MCR_RESET_MASK 0x01 +#define CG14_REV_REVISION_SHIFT 4 +#define CG14_REV_REVISION_MASK 0xf0 +#define CG14_REV_IMPL_SHIFT 0 +#define CG14_REV_IMPL_MASK 0x0f +#define CG14_VBR_FRAMEBASE_SHIFT 12 +#define CG14_VBR_FRAMEBASE_MASK 0x00fff000 +#define CG14_VMCR1_SETUP_SHIFT 0 +#define CG14_VMCR1_SETUP_MASK 0x000001ff +#define CG14_VMCR1_VCONFIG_SHIFT 9 +#define CG14_VMCR1_VCONFIG_MASK 0x00000e00 +#define CG14_VMCR2_REFRESH_SHIFT 0 +#define CG14_VMCR2_REFRESH_MASK 0x00000001 +#define CG14_VMCR2_TESTROWCNT_SHIFT 1 +#define CG14_VMCR2_TESTROWCNT_MASK 0x00000002 +#define CG14_VMCR2_FBCONFIG_SHIFT 2 +#define CG14_VMCR2_FBCONFIG_MASK 0x0000000c +#define CG14_VCR_REFRESHREQ_SHIFT 0 +#define CG14_VCR_REFRESHREQ_MASK 0x000003ff +#define CG14_VCR1_REFRESHENA_SHIFT 10 +#define CG14_VCR1_REFRESHENA_MASK 0x00000400 +#define CG14_VCA_CAD_SHIFT 0 +#define CG14_VCA_CAD_MASK 0x000003ff +#define CG14_VCA_VERS_SHIFT 10 +#define CG14_VCA_VERS_MASK 0x00000c00 +#define CG14_VCA_RAMSPEED_SHIFT 12 +#define CG14_VCA_RAMSPEED_MASK 0x00001000 +#define CG14_VCA_8MB_SHIFT 13 +#define CG14_VCA_8MB_MASK 0x00002000 + +#define CG14_MCR_PIXMODE_8 0 +#define CG14_MCR_PIXMODE_16 2 +#define CG14_MCR_PIXMODE_32 3 + +struct cg14_regs{ + u8 mcr; /* Master Control Reg */ + u8 ppr; /* Packed Pixel Reg */ + u8 tms[2]; /* Test Mode Status Regs */ + u8 msr; /* Master Status Reg */ + u8 fsr; /* Fault Status Reg */ + u8 rev; /* Revision & Impl */ + u8 ccr; /* Clock Control Reg */ + u32 tmr; /* Test Mode Read Back */ + u8 mod; /* Monitor Operation Data Reg */ + u8 acr; /* Aux Control */ + u8 xxx0[6]; + u16 hct; /* Hor Counter */ + u16 vct; /* Vert Counter */ + u16 hbs; /* Hor Blank Start */ + u16 hbc; /* Hor Blank Clear */ + u16 hss; /* Hor Sync Start */ + u16 hsc; /* Hor Sync Clear */ + u16 csc; /* Composite Sync Clear */ + u16 vbs; /* Vert Blank Start */ + u16 vbc; /* Vert Blank Clear */ + u16 vss; /* Vert Sync Start */ + u16 vsc; /* Vert Sync Clear */ + u16 xcs; + u16 xcc; + u16 fsa; /* Fault Status Address */ + u16 adr; /* Address Registers */ + u8 xxx1[0xce]; + u8 pcg[0x100]; /* Pixel Clock Generator */ + u32 vbr; /* Frame Base Row */ + u32 vmcr; /* VBC Master Control */ + u32 vcr; /* VBC refresh */ + u32 vca; /* VBC Config */ +}; + +#define CG14_CCR_ENABLE 0x04 +#define CG14_CCR_SELECT 0x02 /* HW/Full screen */ + +struct cg14_cursor { + u32 cpl0[32]; /* Enable plane 0 */ + u32 cpl1[32]; /* Color selection plane */ + u8 ccr; /* Cursor Control Reg */ + u8 xxx0[3]; + u16 cursx; /* Cursor x,y position */ + u16 cursy; /* Cursor x,y position */ + u32 color0; + u32 color1; + u32 xxx1[0x1bc]; + u32 cpl0i[32]; /* Enable plane 0 autoinc */ + u32 cpl1i[32]; /* Color selection autoinc */ +}; + +struct cg14_dac { + u8 addr; /* Address Register */ + u8 xxx0[255]; + u8 glut; /* Gamma table */ + u8 xxx1[255]; + u8 select; /* Register Select */ + u8 xxx2[255]; + u8 mode; /* Mode Register */ +}; + +struct cg14_xlut{ + u8 x_xlut [256]; + u8 x_xlutd [256]; + u8 xxx0[0x600]; + u8 x_xlut_inc [256]; + u8 x_xlutd_inc [256]; +}; + +/* Color look up table (clut) */ +/* Each one of these arrays hold the color lookup table (for 256 + * colors) for each MDI page (I assume then there should be 4 MDI + * pages, I still wonder what they are. I have seen NeXTStep split + * the screen in four parts, while operating in 24 bits mode. Each + * integer holds 4 values: alpha value (transparency channel, thanks + * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue + * + * I currently use the clut instead of the Xlut + */ +struct cg14_clut { + u32 c_clut [256]; + u32 c_clutd [256]; /* i wonder what the 'd' is for */ + u32 c_clut_inc [256]; + u32 c_clutd_inc [256]; +}; + +#define CG14_MMAP_ENTRIES 16 + +struct cg14_par { + spinlock_t lock; + struct cg14_regs __iomem *regs; + struct cg14_clut __iomem *clut; + struct cg14_cursor __iomem *cursor; + + u32 flags; +#define CG14_FLAG_BLANKED 0x00000001 + + unsigned long iospace; + + struct sbus_mmap_map mmap_map[CG14_MMAP_ENTRIES]; + + int mode; + int ramsize; +}; + +static void __cg14_reset(struct cg14_par *par) +{ + struct cg14_regs __iomem *regs = par->regs; + u8 val; + + val = sbus_readb(®s->mcr); + val &= ~(CG14_MCR_PIXMODE_MASK); + sbus_writeb(val, ®s->mcr); +} + +static int cg14_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) +{ + struct cg14_par *par = (struct cg14_par *) info->par; + unsigned long flags; + + /* We just use this to catch switches out of + * graphics mode. + */ + spin_lock_irqsave(&par->lock, flags); + __cg14_reset(par); + spin_unlock_irqrestore(&par->lock, flags); + + if (var->xoffset || var->yoffset || var->vmode) + return -EINVAL; + return 0; +} + +/** + * cg14_setcolreg - Optional function. Sets a color register. + * @regno: boolean, 0 copy local, 1 get_user() function + * @red: frame buffer colormap structure + * @green: The green value which can be up to 16 bits wide + * @blue: The blue value which can be up to 16 bits wide. + * @transp: If supported the alpha value which can be up to 16 bits wide. + * @info: frame buffer info structure + */ +static int cg14_setcolreg(unsigned regno, + unsigned red, unsigned green, unsigned blue, + unsigned transp, struct fb_info *info) +{ + struct cg14_par *par = (struct cg14_par *) info->par; + struct cg14_clut __iomem *clut = par->clut; + unsigned long flags; + u32 val; + + if (regno >= 256) + return 1; + + red >>= 8; + green >>= 8; + blue >>= 8; + val = (red | (green << 8) | (blue << 16)); + + spin_lock_irqsave(&par->lock, flags); + sbus_writel(val, &clut->c_clut[regno]); + spin_unlock_irqrestore(&par->lock, flags); + + return 0; +} + +static int cg14_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct cg14_par *par = (struct cg14_par *) info->par; + + return sbusfb_mmap_helper(par->mmap_map, + info->fix.smem_start, info->fix.smem_len, + par->iospace, vma); +} + +static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) +{ + struct cg14_par *par = (struct cg14_par *) info->par; + struct cg14_regs __iomem *regs = par->regs; + struct mdi_cfginfo kmdi, __user *mdii; + unsigned long flags; + int cur_mode, mode, ret = 0; + + switch (cmd) { + case MDI_RESET: + spin_lock_irqsave(&par->lock, flags); + __cg14_reset(par); + spin_unlock_irqrestore(&par->lock, flags); + break; + + case MDI_GET_CFGINFO: + memset(&kmdi, 0, sizeof(kmdi)); + + spin_lock_irqsave(&par->lock, flags); + kmdi.mdi_type = FBTYPE_MDICOLOR; + kmdi.mdi_height = info->var.yres; + kmdi.mdi_width = info->var.xres; + kmdi.mdi_mode = par->mode; + kmdi.mdi_pixfreq = 72; /* FIXME */ + kmdi.mdi_size = par->ramsize; + spin_unlock_irqrestore(&par->lock, flags); + + mdii = (struct mdi_cfginfo __user *) arg; + if (copy_to_user(mdii, &kmdi, sizeof(kmdi))) + ret = -EFAULT; + break; + + case MDI_SET_PIXELMODE: + if (get_user(mode, (int __user *) arg)) { + ret = -EFAULT; + break; + } + + spin_lock_irqsave(&par->lock, flags); + cur_mode = sbus_readb(®s->mcr); + cur_mode &= ~CG14_MCR_PIXMODE_MASK; + switch(mode) { + case MDI_32_PIX: + cur_mode |= (CG14_MCR_PIXMODE_32 << + CG14_MCR_PIXMODE_SHIFT); + break; + + case MDI_16_PIX: + cur_mode |= (CG14_MCR_PIXMODE_16 << + CG14_MCR_PIXMODE_SHIFT); + break; + + case MDI_8_PIX: + break; + + default: + ret = -ENOSYS; + break; + } + if (!ret) { + sbus_writeb(cur_mode, ®s->mcr); + par->mode = mode; + } + spin_unlock_irqrestore(&par->lock, flags); + break; + + default: + ret = sbusfb_ioctl_helper(cmd, arg, info, + FBTYPE_MDICOLOR, 8, + info->fix.smem_len); + break; + } + + return ret; +} + +/* + * Initialisation + */ + +static void cg14_init_fix(struct fb_info *info, int linebytes, + struct device_node *dp) +{ + snprintf(info->fix.id, sizeof(info->fix.id), "%pOFn", dp); + + info->fix.type = FB_TYPE_PACKED_PIXELS; + info->fix.visual = FB_VISUAL_PSEUDOCOLOR; + + info->fix.line_length = linebytes; + + info->fix.accel = FB_ACCEL_SUN_CG14; +} + +static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] = { + { + .voff = CG14_REGS, + .poff = 0x80000000, + .size = 0x1000 + }, + { + .voff = CG14_XLUT, + .poff = 0x80003000, + .size = 0x1000 + }, + { + .voff = CG14_CLUT1, + .poff = 0x80004000, + .size = 0x1000 + }, + { + .voff = CG14_CLUT2, + .poff = 0x80005000, + .size = 0x1000 + }, + { + .voff = CG14_CLUT3, + .poff = 0x80006000, + .size = 0x1000 + }, + { + .voff = CG3_MMAP_OFFSET - 0x7000, + .poff = 0x80000000, + .size = 0x7000 + }, + { + .voff = CG3_MMAP_OFFSET, + .poff = 0x00000000, + .size = SBUS_MMAP_FBSIZE(1) + }, + { + .voff = MDI_CURSOR_MAP, + .poff = 0x80001000, + .size = 0x1000 + }, + { + .voff = MDI_CHUNKY_BGR_MAP, + .poff = 0x01000000, + .size = 0x400000 + }, + { + .voff = MDI_PLANAR_X16_MAP, + .poff = 0x02000000, + .size = 0x200000 + }, + { + .voff = MDI_PLANAR_C16_MAP, + .poff = 0x02800000, + .size = 0x200000 + }, + { + .voff = MDI_PLANAR_X32_MAP, + .poff = 0x03000000, + .size = 0x100000 + }, + { + .voff = MDI_PLANAR_B32_MAP, + .poff = 0x03400000, + .size = 0x100000 + }, + { + .voff = MDI_PLANAR_G32_MAP, + .poff = 0x03800000, + .size = 0x100000 + }, + { + .voff = MDI_PLANAR_R32_MAP, + .poff = 0x03c00000, + .size = 0x100000 + }, + { .size = 0 } +}; + +static void cg14_unmap_regs(struct platform_device *op, struct fb_info *info, + struct cg14_par *par) +{ + if (par->regs) + of_iounmap(&op->resource[0], + par->regs, sizeof(struct cg14_regs)); + if (par->clut) + of_iounmap(&op->resource[0], + par->clut, sizeof(struct cg14_clut)); + if (par->cursor) + of_iounmap(&op->resource[0], + par->cursor, sizeof(struct cg14_cursor)); + if (info->screen_base) + of_iounmap(&op->resource[1], + info->screen_base, info->fix.smem_len); +} + +static int cg14_probe(struct platform_device *op) +{ + struct device_node *dp = op->dev.of_node; + struct fb_info *info; + struct cg14_par *par; + int is_8mb, linebytes, i, err; + + info = framebuffer_alloc(sizeof(struct cg14_par), &op->dev); + + err = -ENOMEM; + if (!info) + goto out_err; + par = info->par; + + spin_lock_init(&par->lock); + + sbusfb_fill_var(&info->var, dp, 8); + info->var.red.length = 8; + info->var.green.length = 8; + info->var.blue.length = 8; + + linebytes = of_getintprop_default(dp, "linebytes", + info->var.xres); + info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); + + if (of_node_name_eq(dp->parent, "sbus") || + of_node_name_eq(dp->parent, "sbi")) { + info->fix.smem_start = op->resource[0].start; + par->iospace = op->resource[0].flags & IORESOURCE_BITS; + } else { + info->fix.smem_start = op->resource[1].start; + par->iospace = op->resource[0].flags & IORESOURCE_BITS; + } + + par->regs = of_ioremap(&op->resource[0], 0, + sizeof(struct cg14_regs), "cg14 regs"); + par->clut = of_ioremap(&op->resource[0], CG14_CLUT1, + sizeof(struct cg14_clut), "cg14 clut"); + par->cursor = of_ioremap(&op->resource[0], CG14_CURSORREGS, + sizeof(struct cg14_cursor), "cg14 cursor"); + + info->screen_base = of_ioremap(&op->resource[1], 0, + info->fix.smem_len, "cg14 ram"); + + if (!par->regs || !par->clut || !par->cursor || !info->screen_base) + goto out_unmap_regs; + + is_8mb = (resource_size(&op->resource[1]) == (8 * 1024 * 1024)); + + BUILD_BUG_ON(sizeof(par->mmap_map) != sizeof(__cg14_mmap_map)); + + memcpy(&par->mmap_map, &__cg14_mmap_map, sizeof(par->mmap_map)); + + for (i = 0; i < CG14_MMAP_ENTRIES; i++) { + struct sbus_mmap_map *map = &par->mmap_map[i]; + + if (!map->size) + break; + if (map->poff & 0x80000000) + map->poff = (map->poff & 0x7fffffff) + + (op->resource[0].start - + op->resource[1].start); + if (is_8mb && + map->size >= 0x100000 && + map->size <= 0x400000) + map->size *= 2; + } + + par->mode = MDI_8_PIX; + par->ramsize = (is_8mb ? 0x800000 : 0x400000); + + info->flags = FBINFO_HWACCEL_YPAN; + info->fbops = &cg14_ops; + + __cg14_reset(par); + + if (fb_alloc_cmap(&info->cmap, 256, 0)) + goto out_unmap_regs; + + fb_set_cmap(&info->cmap, info); + + cg14_init_fix(info, linebytes, dp); + + err = register_framebuffer(info); + if (err < 0) + goto out_dealloc_cmap; + + dev_set_drvdata(&op->dev, info); + + printk(KERN_INFO "%pOF: cgfourteen at %lx:%lx, %dMB\n", + dp, + par->iospace, info->fix.smem_start, + par->ramsize >> 20); + + return 0; + +out_dealloc_cmap: + fb_dealloc_cmap(&info->cmap); + +out_unmap_regs: + cg14_unmap_regs(op, info, par); + framebuffer_release(info); + +out_err: + return err; +} + +static void cg14_remove(struct platform_device *op) +{ + struct fb_info *info = dev_get_drvdata(&op->dev); + struct cg14_par *par = info->par; + + unregister_framebuffer(info); + fb_dealloc_cmap(&info->cmap); + + cg14_unmap_regs(op, info, par); + + framebuffer_release(info); +} + +static const struct of_device_id cg14_match[] = { + { + .name = "cgfourteen", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, cg14_match); + +static struct platform_driver cg14_driver = { + .driver = { + .name = "cg14", + .of_match_table = cg14_match, + }, + .probe = cg14_probe, + .remove_new = cg14_remove, +}; + +static int __init cg14_init(void) +{ + if (fb_get_options("cg14fb", NULL)) + return -ENODEV; + + return platform_driver_register(&cg14_driver); +} + +static void __exit cg14_exit(void) +{ + platform_driver_unregister(&cg14_driver); +} + +module_init(cg14_init); +module_exit(cg14_exit); + +MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets"); +MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); +MODULE_VERSION("2.0"); +MODULE_LICENSE("GPL"); |