diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/video/cyber2000fb.c | 127 |
2 files changed, 136 insertions, 0 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 6bafb51bb43..e0c7edf6c82 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -439,6 +439,15 @@ config FB_CYBER2000 Say Y if you have a NetWinder or a graphics card containing this device, otherwise say N. +config FB_CYBER2000_DDC + bool "DDC for CyberPro support" + depends on FB_CYBER2000 + select FB_DDC + default y + help + 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_APOLLO bool depends on (FB = y) && APOLLO diff --git a/drivers/video/cyber2000fb.c b/drivers/video/cyber2000fb.c index e946741ba2e..87d2aafa92f 100644 --- a/drivers/video/cyber2000fb.c +++ b/drivers/video/cyber2000fb.c @@ -48,6 +48,9 @@ #include <linux/init.h> #include <linux/io.h> +#include <linux/i2c.h> +#include <linux/i2c-algo-bit.h> + #include <asm/pgtable.h> #include <asm/system.h> @@ -88,6 +91,12 @@ struct cfb_info { u_char ramdac_powerdown; u32 pseudo_palette[16]; +#ifdef CONFIG_FB_CYBER2000_DDC + bool ddc_registered; + struct i2c_adapter ddc_adapter; + struct i2c_algo_bit_data ddc_algo; + spinlock_t reg_b0_lock; +#endif }; static char *default_font = "Acorn8x8"; @@ -494,6 +503,9 @@ static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw) cyber2000_attrw(0x14, 0x00, cfb); /* PLL registers */ +#ifdef CONFIG_FB_CYBER2000_DDC + spin_lock(&cfb->reg_b0_lock); +#endif cyber2000_grphw(EXT_DCLK_MULT, hw->clock_mult, cfb); cyber2000_grphw(EXT_DCLK_DIV, hw->clock_div, cfb); cyber2000_grphw(EXT_MCLK_MULT, cfb->mclk_mult, cfb); @@ -501,6 +513,9 @@ static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw) cyber2000_grphw(0x90, 0x01, cfb); cyber2000_grphw(0xb9, 0x80, cfb); cyber2000_grphw(0xb9, 0x00, cfb); +#ifdef CONFIG_FB_CYBER2000_DDC + spin_unlock(&cfb->reg_b0_lock); +#endif cfb->ramdac_ctrl = hw->ramdac; cyber2000fb_write_ramdac_ctrl(cfb); @@ -1141,6 +1156,105 @@ void cyber2000fb_detach(int idx) } EXPORT_SYMBOL(cyber2000fb_detach); +#ifdef CONFIG_FB_CYBER2000_DDC + +#define DDC_REG 0xb0 +#define DDC_SCL_OUT (1 << 0) +#define DDC_SDA_OUT (1 << 4) +#define DDC_SCL_IN (1 << 2) +#define DDC_SDA_IN (1 << 6) + +static void cyber2000fb_enable_ddc(struct cfb_info *cfb) +{ + spin_lock(&cfb->reg_b0_lock); + cyber2000fb_writew(0x1bf, 0x3ce, cfb); +} + +static void cyber2000fb_disable_ddc(struct cfb_info *cfb) +{ + cyber2000fb_writew(0x0bf, 0x3ce, cfb); + spin_unlock(&cfb->reg_b0_lock); +} + + +static void cyber2000fb_ddc_setscl(void *data, int val) +{ + struct cfb_info *cfb = data; + unsigned char reg; + + cyber2000fb_enable_ddc(cfb); + reg = cyber2000_grphr(DDC_REG, cfb); + if (!val) /* bit is inverted */ + reg |= DDC_SCL_OUT; + else + reg &= ~DDC_SCL_OUT; + cyber2000_grphw(DDC_REG, reg, cfb); + cyber2000fb_disable_ddc(cfb); +} + +static void cyber2000fb_ddc_setsda(void *data, int val) +{ + struct cfb_info *cfb = data; + unsigned char reg; + + cyber2000fb_enable_ddc(cfb); + reg = cyber2000_grphr(DDC_REG, cfb); + if (!val) /* bit is inverted */ + reg |= DDC_SDA_OUT; + else + reg &= ~DDC_SDA_OUT; + cyber2000_grphw(DDC_REG, reg, cfb); + cyber2000fb_disable_ddc(cfb); +} + +static int cyber2000fb_ddc_getscl(void *data) +{ + struct cfb_info *cfb = data; + int retval; + + cyber2000fb_enable_ddc(cfb); + retval = !!(cyber2000_grphr(DDC_REG, cfb) & DDC_SCL_IN); + cyber2000fb_disable_ddc(cfb); + + return retval; +} + +static int cyber2000fb_ddc_getsda(void *data) +{ + struct cfb_info *cfb = data; + int retval; + + cyber2000fb_enable_ddc(cfb); + retval = !!(cyber2000_grphr(DDC_REG, cfb) & DDC_SDA_IN); + cyber2000fb_disable_ddc(cfb); + + return retval; +} + +static int __devinit cyber2000fb_setup_ddc_bus(struct cfb_info *cfb) +{ + spin_lock_init(&cfb->reg_b0_lock); + + strlcpy(cfb->ddc_adapter.name, cfb->fb.fix.id, + sizeof(cfb->ddc_adapter.name)); + cfb->ddc_adapter.owner = THIS_MODULE; + cfb->ddc_adapter.class = I2C_CLASS_DDC; + cfb->ddc_adapter.algo_data = &cfb->ddc_algo; + cfb->ddc_adapter.dev.parent = &cfb->dev->dev; + cfb->ddc_algo.setsda = cyber2000fb_ddc_setsda; + cfb->ddc_algo.setscl = cyber2000fb_ddc_setscl; + cfb->ddc_algo.getsda = cyber2000fb_ddc_getsda; + cfb->ddc_algo.getscl = cyber2000fb_ddc_getscl; + cfb->ddc_algo.udelay = 10; + cfb->ddc_algo.timeout = 20; + cfb->ddc_algo.data = cfb; + + i2c_set_adapdata(&cfb->ddc_adapter, cfb); + + return i2c_bit_add_bus(&cfb->ddc_adapter); +} +#endif /* CONFIG_FB_CYBER2000_DDC */ + /* * These parameters give * 640x480, hsync 31.5kHz, vsync 60Hz @@ -1369,6 +1483,11 @@ static int __devinit cyberpro_common_probe(struct cfb_info *cfb) cfb->fb.fix.mmio_len = MMIO_SIZE; cfb->fb.screen_base = cfb->region; +#ifdef CONFIG_FB_CYBER2000_DDC + if (cyber2000fb_setup_ddc_bus(cfb) == 0) + cfb->ddc_registered = true; +#endif + err = -EINVAL; if (!fb_find_mode(&cfb->fb.var, &cfb->fb, NULL, NULL, 0, &cyber2000fb_default_mode, 8)) { @@ -1406,6 +1525,10 @@ static int __devinit cyberpro_common_probe(struct cfb_info *cfb) err = register_framebuffer(&cfb->fb); failed: +#ifdef CONFIG_FB_CYBER2000_DDC + if (err && cfb->ddc_registered) + i2c_del_adapter(&cfb->ddc_adapter); +#endif return err; } @@ -1657,6 +1780,10 @@ static void __devexit cyberpro_pci_remove(struct pci_dev *dev) 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 iounmap(cfb->region); cyberpro_free_fb_info(cfb); |