diff options
Diffstat (limited to 'drivers/video/i810/i810-i2c.c')
| -rw-r--r-- | drivers/video/i810/i810-i2c.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/drivers/video/i810/i810-i2c.c b/drivers/video/i810/i810-i2c.c deleted file mode 100644 index 7db17d0d8a8c..000000000000 --- a/drivers/video/i810/i810-i2c.c +++ /dev/null @@ -1,175 +0,0 @@ - /*-*- linux-c -*- - * linux/drivers/video/i810-i2c.c -- Intel 810/815 I2C support - * - * Copyright (C) 2004 Antonino Daplas<adaplas@pol.net> - * All Rights Reserved - * - * 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/delay.h> -#include <linux/gfp.h> -#include <linux/pci.h> -#include <linux/fb.h> -#include "i810.h" -#include "i810_regs.h" -#include "i810_main.h" -#include "../edid.h" - -/* bit locations in the registers */ -#define SCL_DIR_MASK 0x0001 -#define SCL_DIR 0x0002 -#define SCL_VAL_MASK 0x0004 -#define SCL_VAL_OUT 0x0008 -#define SCL_VAL_IN 0x0010 -#define SDA_DIR_MASK 0x0100 -#define SDA_DIR 0x0200 -#define SDA_VAL_MASK 0x0400 -#define SDA_VAL_OUT 0x0800 -#define SDA_VAL_IN 0x1000 - -#define DEBUG /* define this for verbose EDID parsing output */ - -#ifdef DEBUG -#define DPRINTK(fmt, args...) printk(fmt,## args) -#else -#define DPRINTK(fmt, args...) -#endif - -static void i810i2c_setscl(void *data, int state) -{ - struct i810fb_i2c_chan *chan = data; - struct i810fb_par *par = chan->par; - u8 __iomem *mmio = par->mmio_start_virtual; - - if (state) - i810_writel(mmio, chan->ddc_base, SCL_DIR_MASK | SCL_VAL_MASK); - else - i810_writel(mmio, chan->ddc_base, SCL_DIR | SCL_DIR_MASK | SCL_VAL_MASK); - i810_readl(mmio, chan->ddc_base); /* flush posted write */ -} - -static void i810i2c_setsda(void *data, int state) -{ - struct i810fb_i2c_chan *chan = data; - struct i810fb_par *par = chan->par; - u8 __iomem *mmio = par->mmio_start_virtual; - - if (state) - i810_writel(mmio, chan->ddc_base, SDA_DIR_MASK | SDA_VAL_MASK); - else - i810_writel(mmio, chan->ddc_base, SDA_DIR | SDA_DIR_MASK | SDA_VAL_MASK); - i810_readl(mmio, chan->ddc_base); /* flush posted write */ -} - -static int i810i2c_getscl(void *data) -{ - struct i810fb_i2c_chan *chan = data; - struct i810fb_par *par = chan->par; - u8 __iomem *mmio = par->mmio_start_virtual; - - i810_writel(mmio, chan->ddc_base, SCL_DIR_MASK); - i810_writel(mmio, chan->ddc_base, 0); - return ((i810_readl(mmio, chan->ddc_base) & SCL_VAL_IN) != 0); -} - -static int i810i2c_getsda(void *data) -{ - struct i810fb_i2c_chan *chan = data; - struct i810fb_par *par = chan->par; - u8 __iomem *mmio = par->mmio_start_virtual; - - i810_writel(mmio, chan->ddc_base, SDA_DIR_MASK); - i810_writel(mmio, chan->ddc_base, 0); - return ((i810_readl(mmio, chan->ddc_base) & SDA_VAL_IN) != 0); -} - -static int i810_setup_i2c_bus(struct i810fb_i2c_chan *chan, const char *name) -{ - int rc; - - strcpy(chan->adapter.name, name); - chan->adapter.owner = THIS_MODULE; - chan->adapter.algo_data = &chan->algo; - chan->adapter.dev.parent = &chan->par->dev->dev; - chan->algo.setsda = i810i2c_setsda; - chan->algo.setscl = i810i2c_setscl; - chan->algo.getsda = i810i2c_getsda; - chan->algo.getscl = i810i2c_getscl; - chan->algo.udelay = 10; - chan->algo.timeout = (HZ/2); - chan->algo.data = chan; - - i2c_set_adapdata(&chan->adapter, chan); - - /* Raise SCL and SDA */ - chan->algo.setsda(chan, 1); - chan->algo.setscl(chan, 1); - udelay(20); - - rc = i2c_bit_add_bus(&chan->adapter); - - if (rc == 0) - dev_dbg(&chan->par->dev->dev, "I2C bus %s registered.\n",name); - else { - dev_warn(&chan->par->dev->dev, "Failed to register I2C bus " - "%s.\n", name); - chan->par = NULL; - } - - return rc; -} - -void i810_create_i2c_busses(struct i810fb_par *par) -{ - par->chan[0].par = par; - par->chan[1].par = par; - par->chan[2].par = par; - - par->chan[0].ddc_base = GPIOA; - i810_setup_i2c_bus(&par->chan[0], "I810-DDC"); - par->chan[1].ddc_base = GPIOB; - i810_setup_i2c_bus(&par->chan[1], "I810-I2C"); - par->chan[2].ddc_base = GPIOC; - i810_setup_i2c_bus(&par->chan[2], "I810-GPIOC"); -} - -void i810_delete_i2c_busses(struct i810fb_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; - - if (par->chan[2].par) - i2c_del_adapter(&par->chan[2].adapter); - par->chan[2].par = NULL; -} - -int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid, int conn) -{ - struct i810fb_par *par = info->par; - u8 *edid = NULL; - - DPRINTK("i810-i2c: Probe DDC%i Bus\n", conn+1); - if (conn < par->ddc_num) { - edid = fb_ddc_read(&par->chan[conn].adapter); - } else { - const u8 *e = fb_firmware_edid(info->device); - - if (e != NULL) { - DPRINTK("i810-i2c: Getting EDID from BIOS\n"); - edid = kmemdup(e, EDID_LENGTH, GFP_KERNEL); - } - } - - *out_edid = edid; - - return (edid) ? 0 : 1; -} |