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linux_dsm_epyc7002/drivers/video/fbdev/chipsfb.c
Gustavo A. R. Silva 2d9e4e2bb5 video/chips: constify fb_fix_screeninfo and fb_var_screeninfo structures 
These structures are only used to copy into other structures,
so declare them as const.

This issue was detected using Coccinelle and the following semantic patch:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct fb_fix_screeninfo i@p = { ... };

@ok@
identifier r.i;
expression e;
position p;
@@
e = i@p

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct fb_fix_screeninfo e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct fb_fix_screeninfo i = { ... };

The semantic patch for fb_var_screeninfo is analogous.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
2017-08-01 17:20:39 +02:00

520 lines
12 KiB
C
Raw Blame History

/*
* drivers/video/chipsfb.c -- frame buffer device for
* Chips & Technologies 65550 chip.
*
* Copyright (C) 1998-2002 Paul Mackerras
*
* This file is derived from the Powermac "chips" driver:
* Copyright (C) 1997 Fabio Riccardi.
* And from the frame buffer device for Open Firmware-initialized devices:
* Copyright (C) 1997 Geert Uytterhoeven.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h>
#include <asm/io.h>
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
#endif
/*
* Since we access the display with inb/outb to fixed port numbers,
* we can only handle one 6555x chip. -- paulus
*/
#define write_ind(num, val, ap, dp) do { \
outb((num), (ap)); outb((val), (dp)); \
} while (0)
#define read_ind(num, var, ap, dp) do { \
outb((num), (ap)); var = inb((dp)); \
} while (0)
/* extension registers */
#define write_xr(num, val) write_ind(num, val, 0x3d6, 0x3d7)
#define read_xr(num, var) read_ind(num, var, 0x3d6, 0x3d7)
/* flat panel registers */
#define write_fr(num, val) write_ind(num, val, 0x3d0, 0x3d1)
#define read_fr(num, var) read_ind(num, var, 0x3d0, 0x3d1)
/* CRTC registers */
#define write_cr(num, val) write_ind(num, val, 0x3d4, 0x3d5)
#define read_cr(num, var) read_ind(num, var, 0x3d4, 0x3d5)
/* graphics registers */
#define write_gr(num, val) write_ind(num, val, 0x3ce, 0x3cf)
#define read_gr(num, var) read_ind(num, var, 0x3ce, 0x3cf)
/* sequencer registers */
#define write_sr(num, val) write_ind(num, val, 0x3c4, 0x3c5)
#define read_sr(num, var) read_ind(num, var, 0x3c4, 0x3c5)
/* attribute registers - slightly strange */
#define write_ar(num, val) do { \
inb(0x3da); write_ind(num, val, 0x3c0, 0x3c0); \
} while (0)
#define read_ar(num, var) do { \
inb(0x3da); read_ind(num, var, 0x3c0, 0x3c1); \
} while (0)
/*
* Exported functions
*/
int chips_init(void);
static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *);
static int chipsfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info);
static int chipsfb_set_par(struct fb_info *info);
static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static int chipsfb_blank(int blank, struct fb_info *info);
static struct fb_ops chipsfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = chipsfb_check_var,
.fb_set_par = chipsfb_set_par,
.fb_setcolreg = chipsfb_setcolreg,
.fb_blank = chipsfb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int chipsfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
if (var->xres > 800 || var->yres > 600
|| var->xres_virtual > 800 || var->yres_virtual > 600
|| (var->bits_per_pixel != 8 && var->bits_per_pixel != 16)
|| var->nonstd
|| (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
return -EINVAL;
var->xres = var->xres_virtual = 800;
var->yres = var->yres_virtual = 600;
return 0;
}
static int chipsfb_set_par(struct fb_info *info)
{
if (info->var.bits_per_pixel == 16) {
write_cr(0x13, 200); // Set line length (doublewords)
write_xr(0x81, 0x14); // 15 bit (555) color mode
write_xr(0x82, 0x00); // Disable palettes
write_xr(0x20, 0x10); // 16 bit blitter mode
info->fix.line_length = 800*2;
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->var.red.offset = 10;
info->var.green.offset = 5;
info->var.blue.offset = 0;
info->var.red.length = info->var.green.length =
info->var.blue.length = 5;
} else {
/* p->var.bits_per_pixel == 8 */
write_cr(0x13, 100); // Set line length (doublewords)
write_xr(0x81, 0x12); // 8 bit color mode
write_xr(0x82, 0x08); // Graphics gamma enable
write_xr(0x20, 0x00); // 8 bit blitter mode
info->fix.line_length = 800;
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
info->var.red.offset = info->var.green.offset =
info->var.blue.offset = 0;
info->var.red.length = info->var.green.length =
info->var.blue.length = 8;
}
return 0;
}
static int chipsfb_blank(int blank, struct fb_info *info)
{
return 1; /* get fb_blank to set the colormap to all black */
}
static int chipsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
if (regno > 255)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
outb(regno, 0x3c8);
udelay(1);
outb(red, 0x3c9);
outb(green, 0x3c9);
outb(blue, 0x3c9);
return 0;
}
struct chips_init_reg {
unsigned char addr;
unsigned char data;
};
static struct chips_init_reg chips_init_sr[] = {
{ 0x00, 0x03 },
{ 0x01, 0x01 },
{ 0x02, 0x0f },
{ 0x04, 0x0e }
};
static struct chips_init_reg chips_init_gr[] = {
{ 0x05, 0x00 },
{ 0x06, 0x0d },
{ 0x08, 0xff }
};
static struct chips_init_reg chips_init_ar[] = {
{ 0x10, 0x01 },
{ 0x12, 0x0f },
{ 0x13, 0x00 }
};
static struct chips_init_reg chips_init_cr[] = {
{ 0x00, 0x7f },
{ 0x01, 0x63 },
{ 0x02, 0x63 },
{ 0x03, 0x83 },
{ 0x04, 0x66 },
{ 0x05, 0x10 },
{ 0x06, 0x72 },
{ 0x07, 0x3e },
{ 0x08, 0x00 },
{ 0x09, 0x40 },
{ 0x0c, 0x00 },
{ 0x0d, 0x00 },
{ 0x10, 0x59 },
{ 0x11, 0x0d },
{ 0x12, 0x57 },
{ 0x13, 0x64 },
{ 0x14, 0x00 },
{ 0x15, 0x57 },
{ 0x16, 0x73 },
{ 0x17, 0xe3 },
{ 0x18, 0xff },
{ 0x30, 0x02 },
{ 0x31, 0x02 },
{ 0x32, 0x02 },
{ 0x33, 0x02 },
{ 0x40, 0x00 },
{ 0x41, 0x00 },
{ 0x40, 0x80 }
};
static struct chips_init_reg chips_init_fr[] = {
{ 0x01, 0x02 },
{ 0x03, 0x08 },
{ 0x04, 0x81 },
{ 0x05, 0x21 },
{ 0x08, 0x0c },
{ 0x0a, 0x74 },
{ 0x0b, 0x11 },
{ 0x10, 0x0c },
{ 0x11, 0xe0 },
/* { 0x12, 0x40 }, -- 3400 needs 40, 2400 needs 48, no way to tell */
{ 0x20, 0x63 },
{ 0x21, 0x68 },
{ 0x22, 0x19 },
{ 0x23, 0x7f },
{ 0x24, 0x68 },
{ 0x26, 0x00 },
{ 0x27, 0x0f },
{ 0x30, 0x57 },
{ 0x31, 0x58 },
{ 0x32, 0x0d },
{ 0x33, 0x72 },
{ 0x34, 0x02 },
{ 0x35, 0x22 },
{ 0x36, 0x02 },
{ 0x37, 0x00 }
};
static struct chips_init_reg chips_init_xr[] = {
{ 0xce, 0x00 }, /* set default memory clock */
{ 0xcc, 0x43 }, /* memory clock ratio */
{ 0xcd, 0x18 },
{ 0xce, 0xa1 },
{ 0xc8, 0x84 },
{ 0xc9, 0x0a },
{ 0xca, 0x00 },
{ 0xcb, 0x20 },
{ 0xcf, 0x06 },
{ 0xd0, 0x0e },
{ 0x09, 0x01 },
{ 0x0a, 0x02 },
{ 0x0b, 0x01 },
{ 0x20, 0x00 },
{ 0x40, 0x03 },
{ 0x41, 0x01 },
{ 0x42, 0x00 },
{ 0x80, 0x82 },
{ 0x81, 0x12 },
{ 0x82, 0x08 },
{ 0xa0, 0x00 },
{ 0xa8, 0x00 }
};
static void chips_hw_init(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(chips_init_xr); ++i)
write_xr(chips_init_xr[i].addr, chips_init_xr[i].data);
outb(0x29, 0x3c2); /* set misc output reg */
for (i = 0; i < ARRAY_SIZE(chips_init_sr); ++i)
write_sr(chips_init_sr[i].addr, chips_init_sr[i].data);
for (i = 0; i < ARRAY_SIZE(chips_init_gr); ++i)
write_gr(chips_init_gr[i].addr, chips_init_gr[i].data);
for (i = 0; i < ARRAY_SIZE(chips_init_ar); ++i)
write_ar(chips_init_ar[i].addr, chips_init_ar[i].data);
for (i = 0; i < ARRAY_SIZE(chips_init_cr); ++i)
write_cr(chips_init_cr[i].addr, chips_init_cr[i].data);
for (i = 0; i < ARRAY_SIZE(chips_init_fr); ++i)
write_fr(chips_init_fr[i].addr, chips_init_fr[i].data);
}
static const struct fb_fix_screeninfo chipsfb_fix = {
.id = "C&T 65550",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_PSEUDOCOLOR,
.accel = FB_ACCEL_NONE,
.line_length = 800,
// FIXME: Assumes 1MB frame buffer, but 65550 supports 1MB or 2MB.
// * "3500" PowerBook G3 (the original PB G3) has 2MB.
// * 2400 has 1MB composed of 2 Mitsubishi M5M4V4265CTP DRAM chips.
// Motherboard actually supports 2MB -- there are two blank locations
// for a second pair of DRAMs. (Thanks, Apple!)
// * 3400 has 1MB (I think). Don't know if it's expandable.
// -- Tim Seufert
.smem_len = 0x100000, /* 1MB */
};
static const struct fb_var_screeninfo chipsfb_var = {
.xres = 800,
.yres = 600,
.xres_virtual = 800,
.yres_virtual = 600,
.bits_per_pixel = 8,
.red = { .length = 8 },
.green = { .length = 8 },
.blue = { .length = 8 },
.height = -1,
.width = -1,
.vmode = FB_VMODE_NONINTERLACED,
.pixclock = 10000,
.left_margin = 16,
.right_margin = 16,
.upper_margin = 16,
.lower_margin = 16,
.hsync_len = 8,
.vsync_len = 8,
};
static void init_chips(struct fb_info *p, unsigned long addr)
{
memset(p->screen_base, 0, 0x100000);
p->fix = chipsfb_fix;
p->fix.smem_start = addr;
p->var = chipsfb_var;
p->fbops = &chipsfb_ops;
p->flags = FBINFO_DEFAULT;
fb_alloc_cmap(&p->cmap, 256, 0);
chips_hw_init();
}
static int chipsfb_pci_init(struct pci_dev *dp, const struct pci_device_id *ent)
{
struct fb_info *p;
unsigned long addr, size;
unsigned short cmd;
int rc = -ENODEV;
if (pci_enable_device(dp) < 0) {
dev_err(&dp->dev, "Cannot enable PCI device\n");
goto err_out;
}
if ((dp->resource[0].flags & IORESOURCE_MEM) == 0)
goto err_disable;
addr = pci_resource_start(dp, 0);
size = pci_resource_len(dp, 0);
if (addr == 0)
goto err_disable;
p = framebuffer_alloc(0, &dp->dev);
if (p == NULL) {
dev_err(&dp->dev, "Cannot allocate framebuffer structure\n");
rc = -ENOMEM;
goto err_disable;
}
if (pci_request_region(dp, 0, "chipsfb") != 0) {
dev_err(&dp->dev, "Cannot request framebuffer\n");
rc = -EBUSY;
goto err_release_fb;
}
#ifdef __BIG_ENDIAN
addr += 0x800000; // Use big-endian aperture
#endif
/* we should use pci_enable_device here, but,
the device doesn't declare its I/O ports in its BARs
so pci_enable_device won't turn on I/O responses */
pci_read_config_word(dp, PCI_COMMAND, &cmd);
cmd |= 3; /* enable memory and IO space */
pci_write_config_word(dp, PCI_COMMAND, cmd);
#ifdef CONFIG_PMAC_BACKLIGHT
/* turn on the backlight */
mutex_lock(&pmac_backlight_mutex);
if (pmac_backlight) {
pmac_backlight->props.power = FB_BLANK_UNBLANK;
backlight_update_status(pmac_backlight);
}
mutex_unlock(&pmac_backlight_mutex);
#endif /* CONFIG_PMAC_BACKLIGHT */
#ifdef CONFIG_PPC
p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE);
#else
p->screen_base = ioremap(addr, 0x200000);
#endif
if (p->screen_base == NULL) {
dev_err(&dp->dev, "Cannot map framebuffer\n");
rc = -ENOMEM;
goto err_release_pci;
}
pci_set_drvdata(dp, p);
init_chips(p, addr);
if (register_framebuffer(p) < 0) {
dev_err(&dp->dev,"C&T 65550 framebuffer failed to register\n");
goto err_unmap;
}
dev_info(&dp->dev,"fb%d: Chips 65550 frame buffer"
" (%dK RAM detected)\n",
p->node, p->fix.smem_len / 1024);
return 0;
err_unmap:
iounmap(p->screen_base);
err_release_pci:
pci_release_region(dp, 0);
err_release_fb:
framebuffer_release(p);
err_disable:
err_out:
return rc;
}
static void chipsfb_remove(struct pci_dev *dp)
{
struct fb_info *p = pci_get_drvdata(dp);
if (p->screen_base == NULL)
return;
unregister_framebuffer(p);
iounmap(p->screen_base);
p->screen_base = NULL;
pci_release_region(dp, 0);
}
#ifdef CONFIG_PM
static int chipsfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct fb_info *p = pci_get_drvdata(pdev);
if (state.event == pdev->dev.power.power_state.event)
return 0;
if (!(state.event & PM_EVENT_SLEEP))
goto done;
console_lock();
chipsfb_blank(1, p);
fb_set_suspend(p, 1);
console_unlock();
done:
pdev->dev.power.power_state = state;
return 0;
}
static int chipsfb_pci_resume(struct pci_dev *pdev)
{
struct fb_info *p = pci_get_drvdata(pdev);
console_lock();
fb_set_suspend(p, 0);
chipsfb_blank(0, p);
console_unlock();
pdev->dev.power.power_state = PMSG_ON;
return 0;
}
#endif /* CONFIG_PM */
static struct pci_device_id chipsfb_pci_tbl[] = {
{ PCI_VENDOR_ID_CT, PCI_DEVICE_ID_CT_65550, PCI_ANY_ID, PCI_ANY_ID },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, chipsfb_pci_tbl);
static struct pci_driver chipsfb_driver = {
.name = "chipsfb",
.id_table = chipsfb_pci_tbl,
.probe = chipsfb_pci_init,
.remove = chipsfb_remove,
#ifdef CONFIG_PM
.suspend = chipsfb_pci_suspend,
.resume = chipsfb_pci_resume,
#endif
};
int __init chips_init(void)
{
if (fb_get_options("chipsfb", NULL))
return -ENODEV;
return pci_register_driver(&chipsfb_driver);
}
module_init(chips_init);
static void __exit chipsfb_exit(void)
{
pci_unregister_driver(&chipsfb_driver);
}
MODULE_LICENSE("GPL");
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