/* cg14.c: CGFOURTEEN frame buffer driver
*
* Copyright (C) 2003 David S. Miller (davem@redhat.com)
* 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/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <asm/sbus.h>
#include <asm/oplib.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 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{
volatile u8 mcr; /* Master Control Reg */
volatile u8 ppr; /* Packed Pixel Reg */
volatile u8 tms[2]; /* Test Mode Status Regs */
volatile u8 msr; /* Master Status Reg */
volatile u8 fsr; /* Fault Status Reg */
volatile u8 rev; /* Revision & Impl */
volatile u8 ccr; /* Clock Control Reg */
volatile u32 tmr; /* Test Mode Read Back */
volatile u8 mod; /* Monitor Operation Data Reg */
volatile u8 acr; /* Aux Control */
u8 xxx0[6];
volatile u16 hct; /* Hor Counter */
volatile u16 vct; /* Vert Counter */
volatile u16 hbs; /* Hor Blank Start */
volatile u16 hbc; /* Hor Blank Clear */
volatile u16 hss; /* Hor Sync Start */
volatile u16 hsc; /* Hor Sync Clear */
volatile u16 csc; /* Composite Sync Clear */
volatile u16 vbs; /* Vert Blank Start */
volatile u16 vbc; /* Vert Blank Clear */
volatile u16 vss; /* Vert Sync Start */
volatile u16 vsc; /* Vert Sync Clear */
volatile u16 xcs;
volatile u16 xcc;
volatile u16 fsa; /* Fault Status Address */
volatile u16 adr; /* Address Registers */
u8 xxx1[0xce];
volatile u8 pcg[0x100]; /* Pixel Clock Generator */
volatile u32 vbr; /* Frame Base Row */
volatile u32 vmcr; /* VBC Master Control */
volatile u32 vcr; /* VBC refresh */
volatile u32 vca; /* VBC Config */
};
#define CG14_CCR_ENABLE 0x04
#define CG14_CCR_SELECT 0x02 /* HW/Full screen */
struct cg14_cursor {
volatile u32 cpl0[32]; /* Enable plane 0 */
volatile u32 cpl1[32]; /* Color selection plane */
volatile u8 ccr; /* Cursor Control Reg */
u8 xxx0[3];
volatile u16 cursx; /* Cursor x,y position */
volatile u16 cursy; /* Cursor x,y position */
volatile u32 color0;
volatile u32 color1;
u32 xxx1[0x1bc];
volatile u32 cpl0i[32]; /* Enable plane 0 autoinc */
volatile u32 cpl1i[32]; /* Color selection autoinc */
};
struct cg14_dac {
volatile u8 addr; /* Address Register */
u8 xxx0[255];
volatile u8 glut; /* Gamma table */
u8 xxx1[255];
volatile u8 select; /* Register Select */
u8 xxx2[255];
volatile u8 mode; /* Mode Register */
};
struct cg14_xlut{
volatile u8 x_xlut [256];
volatile u8 x_xlutd [256];
u8 xxx0[0x600];
volatile u8 x_xlut_inc [256];
volatile 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 physbase;
unsigned long iospace;
unsigned long fbsize;
struct sbus_mmap_map mmap_map[CG14_MMAP_ENTRIES];
int mode;
int ramsize;
struct sbus_dev *sdev;
};
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,
par->physbase, par->fbsize,
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, par->fbsize);
break;
};
return ret;
}
/*
* Initialisation
*/
static void cg14_init_fix(struct fb_info *info, int linebytes)
{
struct cg14_par *par = (struct cg14_par *)info->par;
const char *name;
name = "cgfourteen";
if (par->sdev)
name = par->sdev->prom_name;
strlcpy(info->fix.id, name, sizeof(info->fix.id));
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] __initdata = {
{
.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 }
};
struct all_info {
struct fb_info info;
struct cg14_par par;
struct list_head list;
};
static LIST_HEAD(cg14_list);
static void cg14_init_one(struct sbus_dev *sdev, int node, int parent_node)
{
struct all_info *all;
unsigned long phys, rphys;
u32 bases[6];
int is_8mb, linebytes, i;
if (!sdev) {
if (prom_getproperty(node, "address",
(char *) &bases[0], sizeof(bases)) <= 0
|| !bases[0]) {
printk(KERN_ERR "cg14: Device is not mapped.\n");
return;
}
if (__get_iospace(bases[0]) != __get_iospace(bases[1])) {
printk(KERN_ERR "cg14: I/O spaces don't match.\n");
return;
}
}
all = kmalloc(sizeof(*all), GFP_KERNEL);
if (!all) {
printk(KERN_ERR "cg14: Cannot allocate memory.\n");
return;
}
memset(all, 0, sizeof(*all));
INIT_LIST_HEAD(&all->list);
spin_lock_init(&all->par.lock);
sbusfb_fill_var(&all->info.var, node, 8);
all->info.var.red.length = 8;
all->info.var.green.length = 8;
all->info.var.blue.length = 8;
linebytes = prom_getintdefault(node, "linebytes",
all->info.var.xres);
all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
all->par.sdev = sdev;
if (sdev) {
rphys = sdev->reg_addrs[0].phys_addr;
all->par.physbase = phys = sdev->reg_addrs[1].phys_addr;
all->par.iospace = sdev->reg_addrs[0].which_io;
all->par.regs = sbus_ioremap(&sdev->resource[0], 0,
sizeof(struct cg14_regs),
"cg14 regs");
all->par.clut = sbus_ioremap(&sdev->resource[0], CG14_CLUT1,
sizeof(struct cg14_clut),
"cg14 clut");
all->par.cursor = sbus_ioremap(&sdev->resource[0], CG14_CURSORREGS,
sizeof(struct cg14_cursor),
"cg14 cursor");
all->info.screen_base = sbus_ioremap(&sdev->resource[1], 0,
all->par.fbsize, "cg14 ram");
} else {
rphys = __get_phys(bases[0]);
all->par.physbase = phys = __get_phys(bases[1]);
all->par.iospace = __get_iospace(bases[0]);
all->par.regs = (struct cg14_regs __iomem *)(unsigned long)bases[0];
all->par.clut = (struct cg14_clut __iomem *)((unsigned long)bases[0] +
CG14_CLUT1);
all->par.cursor =
(struct cg14_cursor __iomem *)((unsigned long)bases[0] +
CG14_CURSORREGS);
all->info.screen_base = (char __iomem *)(unsigned long)bases[1];
}
prom_getproperty(node, "reg", (char *) &bases[0], sizeof(bases));
is_8mb = (bases[5] == 0x800000);
if (sizeof(all->par.mmap_map) != sizeof(__cg14_mmap_map)) {
extern void __cg14_mmap_sized_wrongly(void);
__cg14_mmap_sized_wrongly();
}
memcpy(&all->par.mmap_map, &__cg14_mmap_map, sizeof(all->par.mmap_map));
for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
struct sbus_mmap_map *map = &all->par.mmap_map[i];
if (!map->size)
break;
if (map->poff & 0x80000000)
map->poff = (map->poff & 0x7fffffff) + rphys - phys;
if (is_8mb &&
map->size >= 0x100000 &&
map->size <= 0x400000)
map->size *= 2;
}
all->par.mode = MDI_8_PIX;
all->par.ramsize = (is_8mb ? 0x800000 : 0x400000);
all->info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
all->info.fbops = &cg14_ops;
all->info.par = &all->par;
__cg14_reset(&all->par);
if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
printk(KERN_ERR "cg14: Could not allocate color map.\n");
kfree(all);
return;
}
fb_set_cmap(&all->info.cmap, &all->info);
cg14_init_fix(&all->info, linebytes);
if (register_framebuffer(&all->info) < 0) {
printk(KERN_ERR "cg14: Could not register framebuffer.\n");
fb_dealloc_cmap(&all->info.cmap);
kfree(all);
return;
}
list_add(&all->list, &cg14_list);
printk("cg14: cgfourteen at %lx:%lx, %dMB\n",
all->par.iospace, all->par.physbase, all->par.ramsize >> 20);
}
int __init cg14_init(void)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev;
if (fb_get_options("cg14fb", NULL))
return -ENODEV;
#ifdef CONFIG_SPARC32
{
int root, node;
root = prom_getchild(prom_root_node);
root = prom_searchsiblings(root, "obio");
if (root) {
node = prom_searchsiblings(prom_getchild(root),
"cgfourteen");
if (node)
cg14_init_one(NULL, node, root);
}
}
#endif
for_all_sbusdev(sdev, sbus) {
if (!strcmp(sdev->prom_name, "cgfourteen"))
cg14_init_one(sdev, sdev->prom_node, sbus->prom_node);
}
return 0;
}
void __exit cg14_exit(void)
{
struct list_head *pos, *tmp;
list_for_each_safe(pos, tmp, &cg14_list) {
struct all_info *all = list_entry(pos, typeof(*all), list);
unregister_framebuffer(&all->info);
fb_dealloc_cmap(&all->info.cmap);
kfree(all);
}
}
int __init
cg14_setup(char *arg)
{
/* No cmdline options yet... */
return 0;
}
module_init(cg14_init);
#ifdef MODULE
module_exit(cg14_exit);
#endif
MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
MODULE_LICENSE("GPL");
