diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-via.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-via.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-via.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-via.c deleted file mode 100644 index 713d31ad..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-via.c +++ /dev/null @@ -1,180 +0,0 @@ -/* - i2c Support for Via Technologies 82C586B South Bridge - - Copyright (c) 1998, 1999 Kyösti Mälkki <kmalkki@cc.hut.fi> - - 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 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; 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., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-bit.h> -#include <linux/io.h> - -/* Power management registers */ -#define PM_CFG_REVID 0x08 /* silicon revision code */ -#define PM_CFG_IOBASE0 0x20 -#define PM_CFG_IOBASE1 0x48 - -#define I2C_DIR (pm_io_base+0x40) -#define I2C_OUT (pm_io_base+0x42) -#define I2C_IN (pm_io_base+0x44) -#define I2C_SCL 0x02 /* clock bit in DIR/OUT/IN register */ -#define I2C_SDA 0x04 - -/* io-region reservation */ -#define IOSPACE 0x06 - -static struct pci_driver vt586b_driver; -static u16 pm_io_base; - -/* - It does not appear from the datasheet that the GPIO pins are - open drain. So a we set a low value by setting the direction to - output and a high value by setting the direction to input and - relying on the required I2C pullup. The data value is initialized - to 0 in via_init() and never changed. -*/ -static void bit_via_setscl(void *data, int state) -{ - outb(state ? inb(I2C_DIR) & ~I2C_SCL : inb(I2C_DIR) | I2C_SCL, I2C_DIR); -} - -static void bit_via_setsda(void *data, int state) -{ - outb(state ? inb(I2C_DIR) & ~I2C_SDA : inb(I2C_DIR) | I2C_SDA, I2C_DIR); -} - -static int bit_via_getscl(void *data) -{ - return (0 != (inb(I2C_IN) & I2C_SCL)); -} - -static int bit_via_getsda(void *data) -{ - return (0 != (inb(I2C_IN) & I2C_SDA)); -} - - -static struct i2c_algo_bit_data bit_data = { - .setsda = bit_via_setsda, - .setscl = bit_via_setscl, - .getsda = bit_via_getsda, - .getscl = bit_via_getscl, - .udelay = 5, - .timeout = HZ -}; - -static struct i2c_adapter vt586b_adapter = { - .owner = THIS_MODULE, - .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, - .name = "VIA i2c", - .algo_data = &bit_data, -}; - - -static DEFINE_PCI_DEVICE_TABLE(vt586b_ids) = { - { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3) }, - { 0, } -}; - -MODULE_DEVICE_TABLE (pci, vt586b_ids); - -static int __devinit vt586b_probe(struct pci_dev *dev, const struct pci_device_id *id) -{ - u16 base; - u8 rev; - int res; - - if (pm_io_base) { - dev_err(&dev->dev, "i2c-via: Will only support one host\n"); - return -ENODEV; - } - - pci_read_config_byte(dev, PM_CFG_REVID, &rev); - - switch (rev) { - case 0x00: - base = PM_CFG_IOBASE0; - break; - case 0x01: - case 0x10: - base = PM_CFG_IOBASE1; - break; - - default: - base = PM_CFG_IOBASE1; - /* later revision */ - } - - pci_read_config_word(dev, base, &pm_io_base); - pm_io_base &= (0xff << 8); - - if (!request_region(I2C_DIR, IOSPACE, vt586b_driver.name)) { - dev_err(&dev->dev, "IO 0x%x-0x%x already in use\n", I2C_DIR, I2C_DIR + IOSPACE); - return -ENODEV; - } - - outb(inb(I2C_DIR) & ~(I2C_SDA | I2C_SCL), I2C_DIR); - outb(inb(I2C_OUT) & ~(I2C_SDA | I2C_SCL), I2C_OUT); - - /* set up the sysfs linkage to our parent device */ - vt586b_adapter.dev.parent = &dev->dev; - - res = i2c_bit_add_bus(&vt586b_adapter); - if ( res < 0 ) { - release_region(I2C_DIR, IOSPACE); - pm_io_base = 0; - return res; - } - return 0; -} - -static void __devexit vt586b_remove(struct pci_dev *dev) -{ - i2c_del_adapter(&vt586b_adapter); - release_region(I2C_DIR, IOSPACE); - pm_io_base = 0; -} - - -static struct pci_driver vt586b_driver = { - .name = "vt586b_smbus", - .id_table = vt586b_ids, - .probe = vt586b_probe, - .remove = __devexit_p(vt586b_remove), -}; - -static int __init i2c_vt586b_init(void) -{ - return pci_register_driver(&vt586b_driver); -} - -static void __exit i2c_vt586b_exit(void) -{ - pci_unregister_driver(&vt586b_driver); -} - - -MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>"); -MODULE_DESCRIPTION("i2c for Via vt82c586b southbridge"); -MODULE_LICENSE("GPL"); - -module_init(i2c_vt586b_init); -module_exit(i2c_vt586b_exit); |