From: Krzysztof Helt <[email protected]> The I2C functionality provided by the i2c-voodoo3 driver is moved into the tdfxfb (frame buffer driver for Voodoo3 cards). This way there is no conflict between i2c driver and the fb driver.
The tdfxfb does not make use from the DDC functionality yet. It just provides two I2C buses like the i2c-voodoo3 driver (DDC and I2C). Signed-off-by: Krzysztof Helt <[email protected]> --- This open way to remove the i2c-voodoo3 driver. drivers/video/Kconfig | 9 ++ drivers/video/tdfxfb.c | 191 +++++++++++++++++++++++++++++++++++++++++++++++- include/video/tdfx.h | 24 ++++++ 3 files changed, 223 insertions(+), 1 deletions(-) diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 6ff3364..837479b 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -1550,6 +1550,7 @@ config FB_3DFX select FB_CFB_IMAGEBLIT select FB_CFB_FILLRECT select FB_CFB_COPYAREA + select FB_MODE_HELPERS help This driver supports graphics boards with the 3Dfx Banshee, Voodoo3 or VSA-100 (aka Voodoo4/5) chips. Say Y if you have @@ -1565,6 +1566,14 @@ config FB_3DFX_ACCEL This will compile the 3Dfx Banshee/Voodoo3/VSA-100 frame buffer device driver with acceleration functions. +config FB_3DFX_I2C + bool "DDC/I2C for 3dfx Voodoo3 support" + depends on FB_3DFX && EXPERIMENTAL + select FB_DDC + default y + help + Say Y here if you want DDC/I2C support for your 3dfx Voodoo3. + config FB_VOODOO1 tristate "3Dfx Voodoo Graphics (sst1) support" depends on FB && PCI diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c index 14bd3f3..c4152a5 100644 --- a/drivers/video/tdfxfb.c +++ b/drivers/video/tdfxfb.c @@ -1167,6 +1167,190 @@ static struct fb_ops tdfxfb_ops = { #endif }; +#ifdef CONFIG_FB_3DFX_I2C +/* The voo GPIO registers don't have individual masks for each bit + so we always have to read before writing. */ + +static void tdfxfb_i2c_setscl(void *data, int val) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + unsigned int r; + + r = tdfx_inl(par, VIDSERPARPORT); + if (val) + r |= I2C_SCL_OUT; + else + r &= ~I2C_SCL_OUT; + tdfx_outl(par, VIDSERPARPORT, r); + tdfx_inl(par, VIDSERPARPORT); /* flush posted write */ +} + +static void tdfxfb_i2c_setsda(void *data, int val) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + unsigned int r; + + r = tdfx_inl(par, VIDSERPARPORT); + if (val) + r |= I2C_SDA_OUT; + else + r &= ~I2C_SDA_OUT; + tdfx_outl(par, VIDSERPARPORT, r); + tdfx_inl(par, VIDSERPARPORT); /* flush posted write */ +} + +/* The GPIO pins are open drain, so the pins always remain outputs. + We rely on the i2c-algo-bit routines to set the pins high before + reading the input from other chips. */ + +static int tdfxfb_i2c_getscl(void *data) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + + return (0 != (tdfx_inl(par, VIDSERPARPORT) & I2C_SCL_IN)); +} + +static int tdfxfb_i2c_getsda(void *data) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + + return (0 != (tdfx_inl(par, VIDSERPARPORT) & I2C_SDA_IN)); +} + +static void tdfxfb_ddc_setscl(void *data, int val) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + unsigned int r; + + r = tdfx_inl(par, VIDSERPARPORT); + if (val) + r |= DDC_SCL_OUT; + else + r &= ~DDC_SCL_OUT; + tdfx_outl(par, VIDSERPARPORT, r); + tdfx_inl(par, VIDSERPARPORT); /* flush posted write */ +} + +static void tdfxfb_ddc_setsda(void *data, int val) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + unsigned int r; + + r = tdfx_inl(par, VIDSERPARPORT); + if (val) + r |= DDC_SDA_OUT; + else + r &= ~DDC_SDA_OUT; + tdfx_outl(par, VIDSERPARPORT, r); + tdfx_inl(par, VIDSERPARPORT); /* flush posted write */ +} + +static int tdfxfb_ddc_getscl(void *data) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + + return (0 != (tdfx_inl(par, VIDSERPARPORT) & DDC_SCL_IN)); +} + +static int tdfxfb_ddc_getsda(void *data) +{ + struct tdfxfb_i2c_chan *chan = data; + struct tdfx_par *par = chan->par; + + return (0 != (tdfx_inl(par, VIDSERPARPORT) & DDC_SDA_IN)); +} + +static int __devinit tdfxfb_setup_ddc_bus(struct tdfxfb_i2c_chan *chan, + const char *name, struct device *dev) +{ + int rc; + + strcpy(chan->adapter.name, name); + chan->adapter.owner = THIS_MODULE; + chan->adapter.class = I2C_CLASS_DDC; + chan->adapter.algo_data = &chan->algo; + chan->adapter.dev.parent = dev; + chan->algo.setsda = tdfxfb_ddc_setsda; + chan->algo.setscl = tdfxfb_ddc_setscl; + chan->algo.getsda = tdfxfb_ddc_getsda; + chan->algo.getscl = tdfxfb_ddc_getscl; + chan->algo.udelay = 10; + chan->algo.timeout = msecs_to_jiffies(500); + chan->algo.data = chan; + + i2c_set_adapdata(&chan->adapter, chan); + + rc = i2c_bit_add_bus(&chan->adapter); + if (rc == 0) + DPRINTK("I2C bus %s registered.\n", name); + else + chan->par = NULL; + + return rc; +} + +static int __devinit tdfxfb_setup_i2c_bus(struct tdfxfb_i2c_chan *chan, + const char *name, struct device *dev) +{ + int rc; + + strcpy(chan->adapter.name, name); + chan->adapter.owner = THIS_MODULE; + chan->adapter.class = I2C_CLASS_TV_ANALOG; + chan->adapter.algo_data = &chan->algo; + chan->adapter.dev.parent = dev; + chan->algo.setsda = tdfxfb_i2c_setsda; + chan->algo.setscl = tdfxfb_i2c_setscl; + chan->algo.getsda = tdfxfb_i2c_getsda; + chan->algo.getscl = tdfxfb_i2c_getscl; + chan->algo.udelay = 10; + chan->algo.timeout = msecs_to_jiffies(500); + chan->algo.data = chan; + + i2c_set_adapdata(&chan->adapter, chan); + + rc = i2c_bit_add_bus(&chan->adapter); + if (rc == 0) + DPRINTK("I2C bus %s registered.\n", name); + else + chan->par = NULL; + + return rc; +} + +static void __devinit tdfxfb_create_i2c_busses(struct fb_info *info) +{ + struct tdfx_par *par = info->par; + + tdfx_outl(par, VIDINFORMAT, 0x8160); + tdfx_outl(par, VIDSERPARPORT, 0xcffc0020); + + par->chan[0].par = par; + par->chan[1].par = par; + + tdfxfb_setup_ddc_bus(&par->chan[0], "VOODOO3-DDC", info->dev); + tdfxfb_setup_i2c_bus(&par->chan[1], "VOODOO3-I2C", info->dev); +} + +static void tdfxfb_delete_i2c_busses(struct tdfx_par *par) +{ + if (par->chan[0].par) + i2c_del_adapter(&par->chan[0].adapter); + par->chan[0].par = NULL; + + if (par->chan[1].par) + i2c_del_adapter(&par->chan[1].adapter); + par->chan[1].par = NULL; +} +#endif /* CONFIG_FB_3DFX_I2C */ + /** * tdfxfb_probe - Device Initializiation * @@ -1284,7 +1468,9 @@ static int __devinit tdfxfb_probe(struct pci_dev *pdev, if (hwcursor) info->fix.smem_len = (info->fix.smem_len - 1024) & (PAGE_MASK << 1); - +#ifdef CONFIG_FB_3DFX_I2C + tdfxfb_create_i2c_busses(info); +#endif if (!mode_option) mode_option = "640x...@60"; @@ -1379,6 +1565,9 @@ static void __devexit tdfxfb_remove(struct pci_dev *pdev) struct tdfx_par *par = info->par; unregister_framebuffer(info); +#ifdef CONFIG_FB_3DFX_I2C + tdfxfb_delete_i2c_busses(par); +#endif if (par->mtrr_handle >= 0) mtrr_del(par->mtrr_handle, info->fix.smem_start, info->fix.smem_len); diff --git a/include/video/tdfx.h b/include/video/tdfx.h index 7431d96..bc37022 100644 --- a/include/video/tdfx.h +++ b/include/video/tdfx.h @@ -1,6 +1,9 @@ #ifndef _TDFX_H #define _TDFX_H +#include <linux/i2c.h> +#include <linux/i2c-algo-bit.h> + /* membase0 register offsets */ #define STATUS 0x00 #define PCIINIT0 0x04 @@ -123,6 +126,18 @@ #define VIDCFG_PIXFMT_SHIFT 18 #define DACMODE_2X BIT(0) +/* I2C bit locations in the VIDSERPARPORT register */ +#define DDC_ENAB 0x00040000 +#define DDC_SCL_OUT 0x00080000 +#define DDC_SDA_OUT 0x00100000 +#define DDC_SCL_IN 0x00200000 +#define DDC_SDA_IN 0x00400000 +#define I2C_ENAB 0x00800000 +#define I2C_SCL_OUT 0x01000000 +#define I2C_SDA_OUT 0x02000000 +#define I2C_SCL_IN 0x04000000 +#define I2C_SDA_IN 0x08000000 + /* VGA rubbish, need to change this for multihead support */ #define MISC_W 0x3c2 #define MISC_R 0x3cc @@ -168,12 +183,21 @@ struct banshee_reg { unsigned long miscinit0; }; +struct tdfx_par; + +struct tdfxfb_i2c_chan { + struct tdfx_par *par; + struct i2c_adapter adapter; + struct i2c_algo_bit_data algo; +}; + struct tdfx_par { u32 max_pixclock; u32 palette[16]; void __iomem *regbase_virt; unsigned long iobase; int mtrr_handle; + struct tdfxfb_i2c_chan chan[2]; }; #endif /* __KERNEL__ */ -- 1.5.2.2 ---------------------------------------------------------------------- Udar sloneczny prezesa Kaczynskiego... >>> http://link.interia.pl/f2083 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
