aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/i810/i810-i2c.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/i810/i810-i2c.c')
-rw-r--r--drivers/video/i810/i810-i2c.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/drivers/video/i810/i810-i2c.c b/drivers/video/i810/i810-i2c.c
deleted file mode 100644
index 7d06b38e80a..00000000000
--- a/drivers/video/i810/i810-i2c.c
+++ /dev/null
@@ -1,214 +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/sched.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/fb.h>
-#include "i810.h"
-#include "i810_regs.h"
-#include "i810_main.h"
-#include "../edid.h"
-
-#define I810_DDC 0x50
-/* 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;
-
- i810_writel(mmio, chan->ddc_base, (state ? SCL_VAL_OUT : 0) | 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;
-
- i810_writel(mmio, chan->ddc_base, (state ? SDA_VAL_OUT : 0) | 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->adapter.id = I2C_HW_B_I810;
- 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_bit_del_bus(&par->chan[0].adapter);
- par->chan[0].par = NULL;
-
- if (par->chan[1].par)
- i2c_bit_del_bus(&par->chan[1].adapter);
- par->chan[1].par = NULL;
-
- if (par->chan[2].par)
- i2c_bit_del_bus(&par->chan[2].adapter);
- par->chan[2].par = NULL;
-}
-
-static u8 *i810_do_probe_i2c_edid(struct i810fb_i2c_chan *chan)
-{
- u8 start = 0x0;
- struct i2c_msg msgs[] = {
- {
- .addr = I810_DDC,
- .len = 1,
- .buf = &start,
- }, {
- .addr = I810_DDC,
- .flags = I2C_M_RD,
- .len = EDID_LENGTH,
- },
- };
- u8 *buf;
-
- buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
- if (!buf) {
- DPRINTK("i810-i2c: Failed to allocate memory\n");
- return NULL;
- }
- msgs[1].buf = buf;
-
- if (i2c_transfer(&chan->adapter, msgs, 2) == 2) {
- DPRINTK("i810-i2c: I2C Transfer successful\n");
- return buf;
- }
-
- DPRINTK("i810-i2c: Unable to read EDID block.\n");
- kfree(buf);
- return NULL;
-}
-
-int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid, int conn)
-{
- struct i810fb_par *par = info->par;
- u8 *edid = NULL;
- int i;
-
- DPRINTK("i810-i2c: Probe DDC%i Bus\n", conn+1);
- if (conn < par->ddc_num) {
- for (i = 0; i < 3; i++) {
- /* Do the real work */
- edid = i810_do_probe_i2c_edid(&par->chan[conn]);
- if (edid)
- break;
- }
- } else {
- const u8 *e = fb_firmware_edid(info->device);
-
- if (e != NULL) {
- DPRINTK("i810-i2c: Getting EDID from BIOS\n");
- edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
- if (edid)
- memcpy(edid, e, EDID_LENGTH);
- }
- }
-
- *out_edid = edid;
-
- return (edid) ? 0 : 1;
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-24 23:49:52 +0000