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path: root/drivers/video/savage/savagefb-i2c.c
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Diffstat (limited to 'drivers/video/savage/savagefb-i2c.c')
-rw-r--r--drivers/video/savage/savagefb-i2c.c279
1 files changed, 0 insertions, 279 deletions
diff --git a/drivers/video/savage/savagefb-i2c.c b/drivers/video/savage/savagefb-i2c.c
deleted file mode 100644
index d7d810dbf0b..00000000000
--- a/drivers/video/savage/savagefb-i2c.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * linux/drivers/video/savage/savagefb-i2c.c - S3 Savage DDC2
- *
- * Copyright 2004 Antonino A. Daplas <adaplas @pol.net>
- *
- * Based partly on rivafb-i2c.c
- *
- * 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 <asm/io.h>
-#include "savagefb.h"
-
-#define SAVAGE_DDC 0x50
-
-#define VGA_CR_IX 0x3d4
-#define VGA_CR_DATA 0x3d5
-
-#define CR_SERIAL1 0xa0 /* I2C serial communications interface */
-#define MM_SERIAL1 0xff20
-#define CR_SERIAL2 0xb1 /* DDC2 monitor communications interface */
-
-/* based on vt8365 documentation */
-#define PROSAVAGE_I2C_ENAB 0x10
-#define PROSAVAGE_I2C_SCL_OUT 0x01
-#define PROSAVAGE_I2C_SDA_OUT 0x02
-#define PROSAVAGE_I2C_SCL_IN 0x04
-#define PROSAVAGE_I2C_SDA_IN 0x08
-
-#define SAVAGE4_I2C_ENAB 0x00000020
-#define SAVAGE4_I2C_SCL_OUT 0x00000001
-#define SAVAGE4_I2C_SDA_OUT 0x00000002
-#define SAVAGE4_I2C_SCL_IN 0x00000008
-#define SAVAGE4_I2C_SDA_IN 0x00000010
-
-#define SET_CR_IX(base, val) writeb((val), base + 0x8000 + VGA_CR_IX)
-#define SET_CR_DATA(base, val) writeb((val), base + 0x8000 + VGA_CR_DATA)
-#define GET_CR_DATA(base) readb(base + 0x8000 + VGA_CR_DATA)
-
-static void savage4_gpio_setscl(void *data, int val)
-{
- struct savagefb_i2c_chan *chan = data;
- unsigned int r;
-
- r = readl(chan->ioaddr + chan->reg);
- if(val)
- r |= SAVAGE4_I2C_SCL_OUT;
- else
- r &= ~SAVAGE4_I2C_SCL_OUT;
- writel(r, chan->ioaddr + chan->reg);
- readl(chan->ioaddr + chan->reg); /* flush posted write */
-}
-
-static void savage4_gpio_setsda(void *data, int val)
-{
- struct savagefb_i2c_chan *chan = data;
-
- unsigned int r;
- r = readl(chan->ioaddr + chan->reg);
- if(val)
- r |= SAVAGE4_I2C_SDA_OUT;
- else
- r &= ~SAVAGE4_I2C_SDA_OUT;
- writel(r, chan->ioaddr + chan->reg);
- readl(chan->ioaddr + chan->reg); /* flush posted write */
-}
-
-static int savage4_gpio_getscl(void *data)
-{
- struct savagefb_i2c_chan *chan = data;
-
- return (0 != (readl(chan->ioaddr + chan->reg) & SAVAGE4_I2C_SCL_IN));
-}
-
-static int savage4_gpio_getsda(void *data)
-{
- struct savagefb_i2c_chan *chan = data;
-
- return (0 != (readl(chan->ioaddr + chan->reg) & SAVAGE4_I2C_SDA_IN));
-}
-
-static void prosavage_gpio_setscl(void* data, int val)
-{
- struct savagefb_i2c_chan *chan = data;
- u32 r;
-
- SET_CR_IX(chan->ioaddr, chan->reg);
- r = GET_CR_DATA(chan->ioaddr);
- r |= PROSAVAGE_I2C_ENAB;
- if (val) {
- r |= PROSAVAGE_I2C_SCL_OUT;
- } else {
- r &= ~PROSAVAGE_I2C_SCL_OUT;
- }
- SET_CR_DATA(chan->ioaddr, r);
-}
-
-static void prosavage_gpio_setsda(void* data, int val)
-{
- struct savagefb_i2c_chan *chan = data;
- unsigned int r;
-
- SET_CR_IX(chan->ioaddr, chan->reg);
- r = GET_CR_DATA(chan->ioaddr);
- r |= PROSAVAGE_I2C_ENAB;
- if (val) {
- r |= PROSAVAGE_I2C_SDA_OUT;
- } else {
- r &= ~PROSAVAGE_I2C_SDA_OUT;
- }
- SET_CR_DATA(chan->ioaddr, r);
-}
-
-static int prosavage_gpio_getscl(void* data)
-{
- struct savagefb_i2c_chan *chan = data;
-
- SET_CR_IX(chan->ioaddr, chan->reg);
- return (0 != (GET_CR_DATA(chan->ioaddr) & PROSAVAGE_I2C_SCL_IN));
-}
-
-static int prosavage_gpio_getsda(void* data)
-{
- struct savagefb_i2c_chan *chan = data;
-
- SET_CR_IX(chan->ioaddr, chan->reg);
- return (0 != (GET_CR_DATA(chan->ioaddr) & PROSAVAGE_I2C_SDA_IN));
-}
-
-static int savage_setup_i2c_bus(struct savagefb_i2c_chan *chan,
- const char *name)
-{
- int rc = 0;
-
- if (chan->par) {
- strcpy(chan->adapter.name, name);
- chan->adapter.owner = THIS_MODULE;
- chan->adapter.id = I2C_HW_B_SAVAGE;
- chan->adapter.algo_data = &chan->algo;
- chan->adapter.dev.parent = &chan->par->pcidev->dev;
- chan->algo.udelay = 40;
- chan->algo.timeout = 20;
- 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->pcidev->dev,
- "I2C bus %s registered.\n", name);
- else
- dev_warn(&chan->par->pcidev->dev,
- "Failed to register I2C bus %s.\n", name);
- } else
- chan->par = NULL;
-
- return rc;
-}
-
-void savagefb_create_i2c_busses(struct fb_info *info)
-{
- struct savagefb_par *par = info->par;
- par->chan.par = par;
-
- switch(info->fix.accel) {
- case FB_ACCEL_PROSAVAGE_DDRK:
- case FB_ACCEL_PROSAVAGE_PM:
- par->chan.reg = CR_SERIAL2;
- par->chan.ioaddr = par->mmio.vbase;
- par->chan.algo.setsda = prosavage_gpio_setsda;
- par->chan.algo.setscl = prosavage_gpio_setscl;
- par->chan.algo.getsda = prosavage_gpio_getsda;
- par->chan.algo.getscl = prosavage_gpio_getscl;
- break;
- case FB_ACCEL_SAVAGE4:
- case FB_ACCEL_SAVAGE2000:
- par->chan.reg = 0xff20;
- par->chan.ioaddr = par->mmio.vbase;
- par->chan.algo.setsda = savage4_gpio_setsda;
- par->chan.algo.setscl = savage4_gpio_setscl;
- par->chan.algo.getsda = savage4_gpio_getsda;
- par->chan.algo.getscl = savage4_gpio_getscl;
- break;
- default:
- par->chan.par = NULL;
- }
-
- savage_setup_i2c_bus(&par->chan, "SAVAGE DDC2");
-}
-
-void savagefb_delete_i2c_busses(struct fb_info *info)
-{
- struct savagefb_par *par = info->par;
-
- if (par->chan.par)
- i2c_bit_del_bus(&par->chan.adapter);
-
- par->chan.par = NULL;
-}
-
-static u8 *savage_do_probe_i2c_edid(struct savagefb_i2c_chan *chan)
-{
- u8 start = 0x0;
- struct i2c_msg msgs[] = {
- {
- .addr = SAVAGE_DDC,
- .len = 1,
- .buf = &start,
- }, {
- .addr = SAVAGE_DDC,
- .flags = I2C_M_RD,
- .len = EDID_LENGTH,
- },
- };
- u8 *buf = NULL;
-
- if (chan->par) {
- buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
-
- if (buf) {
- msgs[1].buf = buf;
-
- if (i2c_transfer(&chan->adapter, msgs, 2) != 2) {
- dev_dbg(&chan->par->pcidev->dev,
- "Unable to read EDID block.\n");
- kfree(buf);
- buf = NULL;
- }
- }
- }
-
- return buf;
-}
-
-int savagefb_probe_i2c_connector(struct fb_info *info, u8 **out_edid)
-{
- struct savagefb_par *par = info->par;
- u8 *edid = NULL;
- int i;
-
- for (i = 0; i < 3; i++) {
- /* Do the real work */
- edid = savage_do_probe_i2c_edid(&par->chan);
- if (edid)
- break;
- }
-
- if (!edid) {
- /* try to get from firmware */
- const u8 *e = fb_firmware_edid(info->device);
-
- if (e) {
- edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
- if (edid)
- memcpy(edid, e, EDID_LENGTH);
- }
- }
-
- *out_edid = edid;
-
- return (edid) ? 0 : 1;
-}
-
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 17:44:26 +0000