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linux/drivers/video/fbdev/sunxvr500.c
Thomas Zimmermann 188a8646b9 fbdev/sunxvr500: Initialize fb_ops to fbdev I/O-memory helpers 
Initialize the instance of struct fb_ops with fbdev initializer
macros for framebuffers in I/O address space. Set the read/write,
draw and mmap callbacks to the correct implementation and avoid
implicit defaults. Also select the necessary I/O helpers in Kconfig.

Fbdev drivers sometimes rely on the callbacks being NULL for a
default implementation to be invoked; hence requiring the I/O
helpers to be built in any case. Setting all callbacks in all
drivers explicitly will allow to make the I/O helpers optional.
This benefits systems that do not use these functions.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230927074722.6197-40-tzimmermann@suse.de
2023-10-19 12:56:55 +02:00

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/* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D fb driver for sparc64 systems
*
* License: GPL
*
* Copyright (C) 2007 David S. Miller (davem@davemloft.net)
*/
#include <linux/aperture.h>
#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/of.h>
#include <asm/io.h>
/* XXX This device has a 'dev-comm' property which apparently is
* XXX a pointer into the openfirmware's address space which is
* XXX a shared area the kernel driver can use to keep OBP
* XXX informed about the current resolution setting. The idea
* XXX is that the kernel can change resolutions, and as long
* XXX as the values in the 'dev-comm' area are accurate then
* XXX OBP can still render text properly to the console.
* XXX
* XXX I'm still working out the layout of this and whether there
* XXX are any signatures we need to look for etc.
*/
struct e3d_info {
struct fb_info *info;
struct pci_dev *pdev;
spinlock_t lock;
char __iomem *fb_base;
unsigned long fb_base_phys;
unsigned long fb8_buf_diff;
unsigned long regs_base_phys;
void __iomem *ramdac;
struct device_node *of_node;
unsigned int width;
unsigned int height;
unsigned int depth;
unsigned int fb_size;
u32 fb_base_reg;
u32 fb8_0_off;
u32 fb8_1_off;
u32 pseudo_palette[16];
};
static int e3d_get_props(struct e3d_info *ep)
{
ep->width = of_getintprop_default(ep->of_node, "width", 0);
ep->height = of_getintprop_default(ep->of_node, "height", 0);
ep->depth = of_getintprop_default(ep->of_node, "depth", 8);
if (!ep->width || !ep->height) {
printk(KERN_ERR "e3d: Critical properties missing for %s\n",
pci_name(ep->pdev));
return -EINVAL;
}
return 0;
}
/* My XVR-500 comes up, at 1280x768 and a FB base register value of
* 0x04000000, the following video layout register values:
*
* RAMDAC_VID_WH 0x03ff04ff
* RAMDAC_VID_CFG 0x1a0b0088
* RAMDAC_VID_32FB_0 0x04000000
* RAMDAC_VID_32FB_1 0x04800000
* RAMDAC_VID_8FB_0 0x05000000
* RAMDAC_VID_8FB_1 0x05200000
* RAMDAC_VID_XXXFB 0x05400000
* RAMDAC_VID_YYYFB 0x05c00000
* RAMDAC_VID_ZZZFB 0x05e00000
*/
/* Video layout registers */
#define RAMDAC_VID_WH 0x00000070UL /* (height-1)<<16 | (width-1) */
#define RAMDAC_VID_CFG 0x00000074UL /* 0x1a000088|(linesz_log2<<16) */
#define RAMDAC_VID_32FB_0 0x00000078UL /* PCI base 32bpp FB buffer 0 */
#define RAMDAC_VID_32FB_1 0x0000007cUL /* PCI base 32bpp FB buffer 1 */
#define RAMDAC_VID_8FB_0 0x00000080UL /* PCI base 8bpp FB buffer 0 */
#define RAMDAC_VID_8FB_1 0x00000084UL /* PCI base 8bpp FB buffer 1 */
#define RAMDAC_VID_XXXFB 0x00000088UL /* PCI base of XXX FB */
#define RAMDAC_VID_YYYFB 0x0000008cUL /* PCI base of YYY FB */
#define RAMDAC_VID_ZZZFB 0x00000090UL /* PCI base of ZZZ FB */
/* CLUT registers */
#define RAMDAC_INDEX 0x000000bcUL
#define RAMDAC_DATA 0x000000c0UL
static void e3d_clut_write(struct e3d_info *ep, int index, u32 val)
{
void __iomem *ramdac = ep->ramdac;
unsigned long flags;
spin_lock_irqsave(&ep->lock, flags);
writel(index, ramdac + RAMDAC_INDEX);
writel(val, ramdac + RAMDAC_DATA);
spin_unlock_irqrestore(&ep->lock, flags);
}
static int e3d_setcolreg(unsigned regno,
unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
struct e3d_info *ep = info->par;
u32 red_8, green_8, blue_8;
u32 red_10, green_10, blue_10;
u32 value;
if (regno >= 256)
return 1;
red_8 = red >> 8;
green_8 = green >> 8;
blue_8 = blue >> 8;
value = (blue_8 << 24) | (green_8 << 16) | (red_8 << 8);
if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16)
((u32 *)info->pseudo_palette)[regno] = value;
red_10 = red >> 6;
green_10 = green >> 6;
blue_10 = blue >> 6;
value = (blue_10 << 20) | (green_10 << 10) | (red_10 << 0);
e3d_clut_write(ep, regno, value);
return 0;
}
/* XXX This is a bit of a hack. I can't figure out exactly how the
* XXX two 8bpp areas of the framebuffer work. I imagine there is
* XXX a WID attribute somewhere else in the framebuffer which tells
* XXX the ramdac which of the two 8bpp framebuffer regions to take
* XXX the pixel from. So, for now, render into both regions to make
* XXX sure the pixel shows up.
*/
static void e3d_imageblit(struct fb_info *info, const struct fb_image *image)
{
struct e3d_info *ep = info->par;
unsigned long flags;
spin_lock_irqsave(&ep->lock, flags);
cfb_imageblit(info, image);
info->screen_base += ep->fb8_buf_diff;
cfb_imageblit(info, image);
info->screen_base -= ep->fb8_buf_diff;
spin_unlock_irqrestore(&ep->lock, flags);
}
static void e3d_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
struct e3d_info *ep = info->par;
unsigned long flags;
spin_lock_irqsave(&ep->lock, flags);
cfb_fillrect(info, rect);
info->screen_base += ep->fb8_buf_diff;
cfb_fillrect(info, rect);
info->screen_base -= ep->fb8_buf_diff;
spin_unlock_irqrestore(&ep->lock, flags);
}
static void e3d_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
struct e3d_info *ep = info->par;
unsigned long flags;
spin_lock_irqsave(&ep->lock, flags);
cfb_copyarea(info, area);
info->screen_base += ep->fb8_buf_diff;
cfb_copyarea(info, area);
info->screen_base -= ep->fb8_buf_diff;
spin_unlock_irqrestore(&ep->lock, flags);
}
static const struct fb_ops e3d_ops = {
.owner = THIS_MODULE,
__FB_DEFAULT_IOMEM_OPS_RDWR,
.fb_setcolreg = e3d_setcolreg,
.fb_fillrect = e3d_fillrect,
.fb_copyarea = e3d_copyarea,
.fb_imageblit = e3d_imageblit,
__FB_DEFAULT_IOMEM_OPS_MMAP,
};
static int e3d_set_fbinfo(struct e3d_info *ep)
{
struct fb_info *info = ep->info;
struct fb_var_screeninfo *var = &info->var;
info->fbops = &e3d_ops;
info->screen_base = ep->fb_base;
info->screen_size = ep->fb_size;
info->pseudo_palette = ep->pseudo_palette;
/* Fill fix common fields */
strscpy(info->fix.id, "e3d", sizeof(info->fix.id));
info->fix.smem_start = ep->fb_base_phys;
info->fix.smem_len = ep->fb_size;
info->fix.type = FB_TYPE_PACKED_PIXELS;
if (ep->depth == 32 || ep->depth == 24)
info->fix.visual = FB_VISUAL_TRUECOLOR;
else
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
var->xres = ep->width;
var->yres = ep->height;
var->xres_virtual = var->xres;
var->yres_virtual = var->yres;
var->bits_per_pixel = ep->depth;
var->red.offset = 8;
var->red.length = 8;
var->green.offset = 16;
var->green.length = 8;
var->blue.offset = 24;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
if (fb_alloc_cmap(&info->cmap, 256, 0)) {
printk(KERN_ERR "e3d: Cannot allocate color map.\n");
return -ENOMEM;
}
return 0;
}
static int e3d_pci_register(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct device_node *of_node;
const char *device_type;
struct fb_info *info;
struct e3d_info *ep;
unsigned int line_length;
int err;
err = aperture_remove_conflicting_pci_devices(pdev, "e3dfb");
if (err)
return err;
of_node = pci_device_to_OF_node(pdev);
if (!of_node) {
printk(KERN_ERR "e3d: Cannot find OF node of %s\n",
pci_name(pdev));
return -ENODEV;
}
device_type = of_get_property(of_node, "device_type", NULL);
if (!device_type) {
printk(KERN_INFO "e3d: Ignoring secondary output device "
"at %s\n", pci_name(pdev));
return -ENODEV;
}
err = pci_enable_device(pdev);
if (err < 0) {
printk(KERN_ERR "e3d: Cannot enable PCI device %s\n",
pci_name(pdev));
goto err_out;
}
info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev);
if (!info) {
err = -ENOMEM;
goto err_disable;
}
ep = info->par;
ep->info = info;
ep->pdev = pdev;
spin_lock_init(&ep->lock);
ep->of_node = of_node;
/* Read the PCI base register of the frame buffer, which we
* need in order to interpret the RAMDAC_VID_*FB* values in
* the ramdac correctly.
*/
pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0,
&ep->fb_base_reg);
ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK;
ep->regs_base_phys = pci_resource_start (pdev, 1);
err = pci_request_region(pdev, 1, "e3d regs");
if (err < 0) {
printk("e3d: Cannot request region 1 for %s\n",
pci_name(pdev));
goto err_release_fb;
}
ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000);
if (!ep->ramdac) {
err = -ENOMEM;
goto err_release_pci1;
}
ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0);
ep->fb8_0_off -= ep->fb_base_reg;
ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1);
ep->fb8_1_off -= ep->fb_base_reg;
ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off;
ep->fb_base_phys = pci_resource_start (pdev, 0);
ep->fb_base_phys += ep->fb8_0_off;
err = pci_request_region(pdev, 0, "e3d framebuffer");
if (err < 0) {
printk("e3d: Cannot request region 0 for %s\n",
pci_name(pdev));
goto err_unmap_ramdac;
}
err = e3d_get_props(ep);
if (err)
goto err_release_pci0;
line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff;
line_length = 1 << line_length;
switch (ep->depth) {
case 8:
info->fix.line_length = line_length;
break;
case 16:
info->fix.line_length = line_length * 2;
break;
case 24:
info->fix.line_length = line_length * 3;
break;
case 32:
info->fix.line_length = line_length * 4;
break;
}
ep->fb_size = info->fix.line_length * ep->height;
ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size);
if (!ep->fb_base) {
err = -ENOMEM;
goto err_release_pci0;
}
err = e3d_set_fbinfo(ep);
if (err)
goto err_unmap_fb;
pci_set_drvdata(pdev, info);
printk("e3d: Found device at %s\n", pci_name(pdev));
err = register_framebuffer(info);
if (err < 0) {
printk(KERN_ERR "e3d: Could not register framebuffer %s\n",
pci_name(pdev));
goto err_free_cmap;
}
return 0;
err_free_cmap:
fb_dealloc_cmap(&info->cmap);
err_unmap_fb:
iounmap(ep->fb_base);
err_release_pci0:
pci_release_region(pdev, 0);
err_unmap_ramdac:
iounmap(ep->ramdac);
err_release_pci1:
pci_release_region(pdev, 1);
err_release_fb:
framebuffer_release(info);
err_disable:
pci_disable_device(pdev);
err_out:
return err;
}
static const struct pci_device_id e3d_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0), },
{ PCI_DEVICE(0x1091, 0x7a0), },
{ PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2), },
{ .vendor = PCI_VENDOR_ID_3DLABS,
.device = PCI_ANY_ID,
.subvendor = PCI_VENDOR_ID_3DLABS,
.subdevice = 0x0108,
},
{ .vendor = PCI_VENDOR_ID_3DLABS,
.device = PCI_ANY_ID,
.subvendor = PCI_VENDOR_ID_3DLABS,
.subdevice = 0x0140,
},
{ .vendor = PCI_VENDOR_ID_3DLABS,
.device = PCI_ANY_ID,
.subvendor = PCI_VENDOR_ID_3DLABS,
.subdevice = 0x1024,
},
{ 0, }
};
static struct pci_driver e3d_driver = {
.driver = {
.suppress_bind_attrs = true,
},
.name = "e3d",
.id_table = e3d_pci_table,
.probe = e3d_pci_register,
};
static int __init e3d_init(void)
{
if (fb_modesetting_disabled("e3d"))
return -ENODEV;
if (fb_get_options("e3d", NULL))
return -ENODEV;
return pci_register_driver(&e3d_driver);
}
device_initcall(e3d_init);
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