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path: root/drivers/video/via/via_i2c.c
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Diffstat (limited to 'drivers/video/via/via_i2c.c')
-rw-r--r--drivers/video/via/via_i2c.c290
1 files changed, 0 insertions, 290 deletions
diff --git a/drivers/video/via/via_i2c.c b/drivers/video/via/via_i2c.c
deleted file mode 100644
index 3844b558b7b..00000000000
--- a/drivers/video/via/via_i2c.c
+++ /dev/null
@@ -1,290 +0,0 @@
-/*
- * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
- * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
-
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation;
- * either version 2, or (at your option) any later version.
-
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE.See the GNU General Public License
- * for more details.
-
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/via-core.h>
-#include <linux/via_i2c.h>
-
-/*
- * There can only be one set of these, so there's no point in having
- * them be dynamically allocated...
- */
-#define VIAFB_NUM_I2C 5
-static struct via_i2c_stuff via_i2c_par[VIAFB_NUM_I2C];
-struct viafb_dev *i2c_vdev; /* Passed in from core */
-
-static void via_i2c_setscl(void *data, int state)
-{
- u8 val;
- struct via_port_cfg *adap_data = data;
- unsigned long flags;
-
- spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
- val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
- if (state)
- val |= 0x20;
- else
- val &= ~0x20;
- switch (adap_data->type) {
- case VIA_PORT_I2C:
- val |= 0x01;
- break;
- case VIA_PORT_GPIO:
- val |= 0x80;
- break;
- default:
- printk(KERN_ERR "viafb_i2c: specify wrong i2c type.\n");
- }
- via_write_reg(adap_data->io_port, adap_data->ioport_index, val);
- spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
-}
-
-static int via_i2c_getscl(void *data)
-{
- struct via_port_cfg *adap_data = data;
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
- if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
- ret = 1;
- spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
- return ret;
-}
-
-static int via_i2c_getsda(void *data)
-{
- struct via_port_cfg *adap_data = data;
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
- if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
- ret = 1;
- spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
- return ret;
-}
-
-static void via_i2c_setsda(void *data, int state)
-{
- u8 val;
- struct via_port_cfg *adap_data = data;
- unsigned long flags;
-
- spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
- val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
- if (state)
- val |= 0x10;
- else
- val &= ~0x10;
- switch (adap_data->type) {
- case VIA_PORT_I2C:
- val |= 0x01;
- break;
- case VIA_PORT_GPIO:
- val |= 0x40;
- break;
- default:
- printk(KERN_ERR "viafb_i2c: specify wrong i2c type.\n");
- }
- via_write_reg(adap_data->io_port, adap_data->ioport_index, val);
- spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
-}
-
-int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata)
-{
- int ret;
- u8 mm1[] = {0x00};
- struct i2c_msg msgs[2];
-
- if (!via_i2c_par[adap].is_active)
- return -ENODEV;
- *pdata = 0;
- msgs[0].flags = 0;
- msgs[1].flags = I2C_M_RD;
- msgs[0].addr = msgs[1].addr = slave_addr / 2;
- mm1[0] = index;
- msgs[0].len = 1; msgs[1].len = 1;
- msgs[0].buf = mm1; msgs[1].buf = pdata;
- ret = i2c_transfer(&via_i2c_par[adap].adapter, msgs, 2);
- if (ret == 2)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
-
- return ret;
-}
-
-int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data)
-{
- int ret;
- u8 msg[2] = { index, data };
- struct i2c_msg msgs;
-
- if (!via_i2c_par[adap].is_active)
- return -ENODEV;
- msgs.flags = 0;
- msgs.addr = slave_addr / 2;
- msgs.len = 2;
- msgs.buf = msg;
- ret = i2c_transfer(&via_i2c_par[adap].adapter, &msgs, 1);
- if (ret == 1)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
-
- return ret;
-}
-
-int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len)
-{
- int ret;
- u8 mm1[] = {0x00};
- struct i2c_msg msgs[2];
-
- if (!via_i2c_par[adap].is_active)
- return -ENODEV;
- msgs[0].flags = 0;
- msgs[1].flags = I2C_M_RD;
- msgs[0].addr = msgs[1].addr = slave_addr / 2;
- mm1[0] = index;
- msgs[0].len = 1; msgs[1].len = buff_len;
- msgs[0].buf = mm1; msgs[1].buf = buff;
- ret = i2c_transfer(&via_i2c_par[adap].adapter, msgs, 2);
- if (ret == 2)
- ret = 0;
- else if (ret >= 0)
- ret = -EIO;
-
- return ret;
-}
-
-/*
- * Allow other viafb subdevices to look up a specific adapter
- * by port name.
- */
-struct i2c_adapter *viafb_find_i2c_adapter(enum viafb_i2c_adap which)
-{
- struct via_i2c_stuff *stuff = &via_i2c_par[which];
-
- return &stuff->adapter;
-}
-EXPORT_SYMBOL_GPL(viafb_find_i2c_adapter);
-
-
-static int create_i2c_bus(struct i2c_adapter *adapter,
- struct i2c_algo_bit_data *algo,
- struct via_port_cfg *adap_cfg,
- struct pci_dev *pdev)
-{
- algo->setsda = via_i2c_setsda;
- algo->setscl = via_i2c_setscl;
- algo->getsda = via_i2c_getsda;
- algo->getscl = via_i2c_getscl;
- algo->udelay = 10;
- algo->timeout = 2;
- algo->data = adap_cfg;
-
- sprintf(adapter->name, "viafb i2c io_port idx 0x%02x",
- adap_cfg->ioport_index);
- adapter->owner = THIS_MODULE;
- adapter->id = 0x01FFFF;
- adapter->class = I2C_CLASS_DDC;
- adapter->algo_data = algo;
- if (pdev)
- adapter->dev.parent = &pdev->dev;
- else
- adapter->dev.parent = NULL;
- /* i2c_set_adapdata(adapter, adap_cfg); */
-
- /* Raise SCL and SDA */
- via_i2c_setsda(adap_cfg, 1);
- via_i2c_setscl(adap_cfg, 1);
- udelay(20);
-
- return i2c_bit_add_bus(adapter);
-}
-
-static int viafb_i2c_probe(struct platform_device *platdev)
-{
- int i, ret;
- struct via_port_cfg *configs;
-
- i2c_vdev = platdev->dev.platform_data;
- configs = i2c_vdev->port_cfg;
-
- for (i = 0; i < VIAFB_NUM_PORTS; i++) {
- struct via_port_cfg *adap_cfg = configs++;
- struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i];
-
- i2c_stuff->is_active = 0;
- if (adap_cfg->type == 0 || adap_cfg->mode != VIA_MODE_I2C)
- continue;
- ret = create_i2c_bus(&i2c_stuff->adapter,
- &i2c_stuff->algo, adap_cfg,
- NULL); /* FIXME: PCIDEV */
- if (ret < 0) {
- printk(KERN_ERR "viafb: cannot create i2c bus %u:%d\n",
- i, ret);
- continue; /* Still try to make the rest */
- }
- i2c_stuff->is_active = 1;
- }
-
- return 0;
-}
-
-static int viafb_i2c_remove(struct platform_device *platdev)
-{
- int i;
-
- for (i = 0; i < VIAFB_NUM_PORTS; i++) {
- struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i];
- /*
- * Only remove those entries in the array that we've
- * actually used (and thus initialized algo_data)
- */
- if (i2c_stuff->is_active)
- i2c_del_adapter(&i2c_stuff->adapter);
- }
- return 0;
-}
-
-static struct platform_driver via_i2c_driver = {
- .driver = {
- .name = "viafb-i2c",
- },
- .probe = viafb_i2c_probe,
- .remove = viafb_i2c_remove,
-};
-
-int viafb_i2c_init(void)
-{
- return platform_driver_register(&via_i2c_driver);
-}
-
-void viafb_i2c_exit(void)
-{
- platform_driver_unregister(&via_i2c_driver);
-}
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