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VIDEO: cyberpro: add support for video capture I2C 

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-08-02 09:57:07 +01:00
parent 052a7f5c49
commit b7ca01a9b2
3 changed files with 118 additions and 14 deletions
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9
drivers/video/Kconfig
View File

@ -448,6 +448,15 @@ config FB_CYBER2000_DDC
Say Y here if you want DDC support for your CyberPro graphics
card. This is only I2C bus support, driver does not use EDID.
config FB_CYBER2000_I2C
bool "CyberPro 2000/2010/5000 I2C support"
depends on FB_CYBER2000 && I2C && ARCH_NETWINDER
select I2C_ALGOBIT
help
Enable support for the I2C video decoder interface on the
Integraphics CyberPro 20x0 and 5000 VGA chips. This is used
on the Netwinder machines for the SAA7111 video capture.
config FB_APOLLO
bool
depends on (FB = y) && APOLLO

122
drivers/video/cyber2000fb.c
View File

@ -47,7 +47,6 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
@ -99,6 +98,11 @@ struct cfb_info {
struct i2c_adapter ddc_adapter;
struct i2c_algo_bit_data ddc_algo;
#endif
#ifdef CONFIG_FB_CYBER2000_I2C
struct i2c_adapter i2c_adapter;
struct i2c_algo_bit_data i2c_algo;
#endif
};
static char *default_font = "Acorn8x8";
@ -1131,6 +1135,11 @@ int cyber2000fb_attach(struct cyberpro_info *info, int idx)
{
if (int_cfb_info != NULL) {
info->dev = int_cfb_info->dev;
#ifdef CONFIG_FB_CYBER2000_I2C
info->i2c = &int_cfb_info->i2c_adapter;
#else
info->i2c = NULL;
#endif
info->regs = int_cfb_info->regs;
info->fb = int_cfb_info->fb.screen_base;
info->fb_size = int_cfb_info->fb.fix.smem_len;
@ -1251,6 +1260,86 @@ static int __devinit cyber2000fb_setup_ddc_bus(struct cfb_info *cfb)
}
#endif /* CONFIG_FB_CYBER2000_DDC */
#ifdef CONFIG_FB_CYBER2000_I2C
static void cyber2000fb_i2c_setsda(void *data, int state)
{
struct cfb_info *cfb = data;
unsigned int latch2;
spin_lock(&cfb->reg_b0_lock);
latch2 = cyber2000_grphr(EXT_LATCH2, cfb);
latch2 &= EXT_LATCH2_I2C_CLKEN;
if (state)
latch2 |= EXT_LATCH2_I2C_DATEN;
cyber2000_grphw(EXT_LATCH2, latch2, cfb);
spin_unlock(&cfb->reg_b0_lock);
}
static void cyber2000fb_i2c_setscl(void *data, int state)
{
struct cfb_info *cfb = data;
unsigned int latch2;
spin_lock(&cfb->reg_b0_lock);
latch2 = cyber2000_grphr(EXT_LATCH2, cfb);
latch2 &= EXT_LATCH2_I2C_DATEN;
if (state)
latch2 |= EXT_LATCH2_I2C_CLKEN;
cyber2000_grphw(EXT_LATCH2, latch2, cfb);
spin_unlock(&cfb->reg_b0_lock);
}
static int cyber2000fb_i2c_getsda(void *data)
{
struct cfb_info *cfb = data;
int ret;
spin_lock(&cfb->reg_b0_lock);
ret = !!(cyber2000_grphr(EXT_LATCH2, cfb) & EXT_LATCH2_I2C_DAT);
spin_unlock(&cfb->reg_b0_lock);
return ret;
}
static int cyber2000fb_i2c_getscl(void *data)
{
struct cfb_info *cfb = data;
int ret;
spin_lock(&cfb->reg_b0_lock);
ret = !!(cyber2000_grphr(EXT_LATCH2, cfb) & EXT_LATCH2_I2C_CLK);
spin_unlock(&cfb->reg_b0_lock);
return ret;
}
static int __devinit cyber2000fb_i2c_register(struct cfb_info *cfb)
{
strlcpy(cfb->i2c_adapter.name, cfb->fb.fix.id,
sizeof(cfb->i2c_adapter.name));
cfb->i2c_adapter.owner = THIS_MODULE;
cfb->i2c_adapter.algo_data = &cfb->i2c_algo;
cfb->i2c_adapter.dev.parent = &cfb->dev->dev;
cfb->i2c_algo.setsda = cyber2000fb_i2c_setsda;
cfb->i2c_algo.setscl = cyber2000fb_i2c_setscl;
cfb->i2c_algo.getsda = cyber2000fb_i2c_getsda;
cfb->i2c_algo.getscl = cyber2000fb_i2c_getscl;
cfb->i2c_algo.udelay = 5;
cfb->i2c_algo.timeout = msecs_to_jiffies(100);
cfb->i2c_algo.data = cfb;
return i2c_bit_add_bus(&cfb->i2c_adapter);
}
static void cyber2000fb_i2c_unregister(struct cfb_info *cfb)
{
i2c_del_adapter(&cfb->i2c_adapter);
}
#else
#define cyber2000fb_i2c_register(cfb) (0)
#define cyber2000fb_i2c_unregister(cfb) do { } while (0)
#endif
/*
* These parameters give
* 640x480, hsync 31.5kHz, vsync 60Hz
@ -1520,7 +1609,14 @@ static int __devinit cyberpro_common_probe(struct cfb_info *cfb)
if (cfb->dev)
cfb->fb.device = &cfb->dev->dev;
err = cyber2000fb_i2c_register(cfb);
if (err)
goto failed;
err = register_framebuffer(&cfb->fb);
if (err)
cyber2000fb_i2c_unregister(cfb);
failed:
#ifdef CONFIG_FB_CYBER2000_DDC
@ -1530,6 +1626,16 @@ static int __devinit cyberpro_common_probe(struct cfb_info *cfb)
return err;
}
static void __devexit cyberpro_common_remove(struct cfb_info *cfb)
{
unregister_framebuffer(&cfb->fb);
#ifdef CONFIG_FB_CYBER2000_DDC
if (cfb->ddc_registered)
i2c_del_adapter(&cfb->ddc_adapter);
#endif
cyber2000fb_i2c_unregister(cfb);
}
static void cyberpro_common_resume(struct cfb_info *cfb)
{
cyberpro_init_hw(cfb);
@ -1769,19 +1875,7 @@ static void __devexit cyberpro_pci_remove(struct pci_dev *dev)
struct cfb_info *cfb = pci_get_drvdata(dev);
if (cfb) {
/*
* If unregister_framebuffer fails, then
* we will be leaving hooks that could cause
* oopsen laying around.
*/
if (unregister_framebuffer(&cfb->fb))
printk(KERN_WARNING "%s: danger Will Robinson, "
"danger danger! Oopsen imminent!\n",
cfb->fb.fix.id);
#ifdef CONFIG_FB_CYBER2000_DDC
if (cfb->ddc_registered)
i2c_del_adapter(&cfb->ddc_adapter);
#endif
cyberpro_common_remove(cfb);
iounmap(cfb->region);
cyberpro_free_fb_info(cfb);

1
drivers/video/cyber2000fb.h
View File

@ -465,6 +465,7 @@ struct cfb_info;
struct cyberpro_info {
struct pci_dev *dev;
struct i2c_adapter *i2c;
unsigned char __iomem *regs;
char __iomem *fb;
char dev_name[32];