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Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-viapro.c')
-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-viapro.c508
1 files changed, 0 insertions, 508 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-viapro.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-viapro.c
deleted file mode 100644
index 333011c8..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-viapro.c
+++ /dev/null
@@ -1,508 +0,0 @@
-/*
- Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
- Philip Edelbrock <phil@netroedge.com>, Kyösti Mälkki <kmalkki@cc.hut.fi>,
- Mark D. Studebaker <mdsxyz123@yahoo.com>
- Copyright (C) 2005 - 2008 Jean Delvare <khali@linux-fr.org>
-
- 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.
-*/
-
-/*
- Supports the following VIA south bridges:
-
- Chip name PCI ID REV I2C block
- VT82C596A 0x3050 no
- VT82C596B 0x3051 no
- VT82C686A 0x3057 0x30 no
- VT82C686B 0x3057 0x40 yes
- VT8231 0x8235 no?
- VT8233 0x3074 yes
- VT8233A 0x3147 yes?
- VT8235 0x3177 yes
- VT8237R 0x3227 yes
- VT8237A 0x3337 yes
- VT8237S 0x3372 yes
- VT8251 0x3287 yes
- CX700 0x8324 yes
- VX800/VX820 0x8353 yes
- VX855/VX875 0x8409 yes
-
- Note: we assume there can only be one device, with one SMBus interface.
-*/
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/stddef.h>
-#include <linux/ioport.h>
-#include <linux/i2c.h>
-#include <linux/init.h>
-#include <linux/acpi.h>
-#include <linux/io.h>
-
-static struct pci_dev *vt596_pdev;
-
-#define SMBBA1 0x90
-#define SMBBA2 0x80
-#define SMBBA3 0xD0
-
-/* SMBus address offsets */
-static unsigned short vt596_smba;
-#define SMBHSTSTS (vt596_smba + 0)
-#define SMBHSTCNT (vt596_smba + 2)
-#define SMBHSTCMD (vt596_smba + 3)
-#define SMBHSTADD (vt596_smba + 4)
-#define SMBHSTDAT0 (vt596_smba + 5)
-#define SMBHSTDAT1 (vt596_smba + 6)
-#define SMBBLKDAT (vt596_smba + 7)
-
-/* PCI Address Constants */
-
-/* SMBus data in configuration space can be found in two places,
- We try to select the better one */
-
-static unsigned short SMBHSTCFG = 0xD2;
-
-/* Other settings */
-#define MAX_TIMEOUT 500
-
-/* VT82C596 constants */
-#define VT596_QUICK 0x00
-#define VT596_BYTE 0x04
-#define VT596_BYTE_DATA 0x08
-#define VT596_WORD_DATA 0x0C
-#define VT596_PROC_CALL 0x10
-#define VT596_BLOCK_DATA 0x14
-#define VT596_I2C_BLOCK_DATA 0x34
-
-
-/* If force is set to anything different from 0, we forcibly enable the
- VT596. DANGEROUS! */
-static bool force;
-module_param(force, bool, 0);
-MODULE_PARM_DESC(force, "Forcibly enable the SMBus. DANGEROUS!");
-
-/* If force_addr is set to anything different from 0, we forcibly enable
- the VT596 at the given address. VERY DANGEROUS! */
-static u16 force_addr;
-module_param(force_addr, ushort, 0);
-MODULE_PARM_DESC(force_addr,
- "Forcibly enable the SMBus at the given address. "
- "EXTREMELY DANGEROUS!");
-
-
-static struct pci_driver vt596_driver;
-static struct i2c_adapter vt596_adapter;
-
-#define FEATURE_I2CBLOCK (1<<0)
-static unsigned int vt596_features;
-
-#ifdef DEBUG
-static void vt596_dump_regs(const char *msg, u8 size)
-{
- dev_dbg(&vt596_adapter.dev, "%s: STS=%02x CNT=%02x CMD=%02x ADD=%02x "
- "DAT=%02x,%02x\n", msg, inb_p(SMBHSTSTS), inb_p(SMBHSTCNT),
- inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
- inb_p(SMBHSTDAT1));
-
- if (size == VT596_BLOCK_DATA
- || size == VT596_I2C_BLOCK_DATA) {
- int i;
-
- dev_dbg(&vt596_adapter.dev, "BLK=");
- for (i = 0; i < I2C_SMBUS_BLOCK_MAX / 2; i++)
- printk("%02x,", inb_p(SMBBLKDAT));
- printk("\n");
- dev_dbg(&vt596_adapter.dev, " ");
- for (; i < I2C_SMBUS_BLOCK_MAX - 1; i++)
- printk("%02x,", inb_p(SMBBLKDAT));
- printk("%02x\n", inb_p(SMBBLKDAT));
- }
-}
-#else
-static inline void vt596_dump_regs(const char *msg, u8 size) { }
-#endif
-
-/* Return -1 on error, 0 on success */
-static int vt596_transaction(u8 size)
-{
- int temp;
- int result = 0;
- int timeout = 0;
-
- vt596_dump_regs("Transaction (pre)", size);
-
- /* Make sure the SMBus host is ready to start transmitting */
- if ((temp = inb_p(SMBHSTSTS)) & 0x1F) {
- dev_dbg(&vt596_adapter.dev, "SMBus busy (0x%02x). "
- "Resetting...\n", temp);
-
- outb_p(temp, SMBHSTSTS);
- if ((temp = inb_p(SMBHSTSTS)) & 0x1F) {
- dev_err(&vt596_adapter.dev, "SMBus reset failed! "
- "(0x%02x)\n", temp);
- return -EBUSY;
- }
- }
-
- /* Start the transaction by setting bit 6 */
- outb_p(0x40 | size, SMBHSTCNT);
-
- /* We will always wait for a fraction of a second */
- do {
- msleep(1);
- temp = inb_p(SMBHSTSTS);
- } while ((temp & 0x01) && (++timeout < MAX_TIMEOUT));
-
- /* If the SMBus is still busy, we give up */
- if (timeout == MAX_TIMEOUT) {
- result = -ETIMEDOUT;
- dev_err(&vt596_adapter.dev, "SMBus timeout!\n");
- }
-
- if (temp & 0x10) {
- result = -EIO;
- dev_err(&vt596_adapter.dev, "Transaction failed (0x%02x)\n",
- size);
- }
-
- if (temp & 0x08) {
- result = -EIO;
- dev_err(&vt596_adapter.dev, "SMBus collision!\n");
- }
-
- if (temp & 0x04) {
- result = -ENXIO;
- dev_dbg(&vt596_adapter.dev, "No response\n");
- }
-
- /* Resetting status register */
- if (temp & 0x1F)
- outb_p(temp, SMBHSTSTS);
-
- vt596_dump_regs("Transaction (post)", size);
-
- return result;
-}
-
-/* Return negative errno on error, 0 on success */
-static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
- unsigned short flags, char read_write, u8 command,
- int size, union i2c_smbus_data *data)
-{
- int i;
- int status;
-
- switch (size) {
- case I2C_SMBUS_QUICK:
- size = VT596_QUICK;
- break;
- case I2C_SMBUS_BYTE:
- if (read_write == I2C_SMBUS_WRITE)
- outb_p(command, SMBHSTCMD);
- size = VT596_BYTE;
- break;
- case I2C_SMBUS_BYTE_DATA:
- outb_p(command, SMBHSTCMD);
- if (read_write == I2C_SMBUS_WRITE)
- outb_p(data->byte, SMBHSTDAT0);
- size = VT596_BYTE_DATA;
- break;
- case I2C_SMBUS_WORD_DATA:
- outb_p(command, SMBHSTCMD);
- if (read_write == I2C_SMBUS_WRITE) {
- outb_p(data->word & 0xff, SMBHSTDAT0);
- outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
- }
- size = VT596_WORD_DATA;
- break;
- case I2C_SMBUS_PROC_CALL:
- outb_p(command, SMBHSTCMD);
- outb_p(data->word & 0xff, SMBHSTDAT0);
- outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
- size = VT596_PROC_CALL;
- break;
- case I2C_SMBUS_I2C_BLOCK_DATA:
- if (!(vt596_features & FEATURE_I2CBLOCK))
- goto exit_unsupported;
- if (read_write == I2C_SMBUS_READ)
- outb_p(data->block[0], SMBHSTDAT0);
- /* Fall through */
- case I2C_SMBUS_BLOCK_DATA:
- outb_p(command, SMBHSTCMD);
- if (read_write == I2C_SMBUS_WRITE) {
- u8 len = data->block[0];
- if (len > I2C_SMBUS_BLOCK_MAX)
- len = I2C_SMBUS_BLOCK_MAX;
- outb_p(len, SMBHSTDAT0);
- inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */
- for (i = 1; i <= len; i++)
- outb_p(data->block[i], SMBBLKDAT);
- }
- size = (size == I2C_SMBUS_I2C_BLOCK_DATA) ?
- VT596_I2C_BLOCK_DATA : VT596_BLOCK_DATA;
- break;
- default:
- goto exit_unsupported;
- }
-
- outb_p(((addr & 0x7f) << 1) | read_write, SMBHSTADD);
-
- status = vt596_transaction(size);
- if (status)
- return status;
-
- if (size == VT596_PROC_CALL)
- read_write = I2C_SMBUS_READ;
-
- if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))
- return 0;
-
- switch (size) {
- case VT596_BYTE:
- case VT596_BYTE_DATA:
- data->byte = inb_p(SMBHSTDAT0);
- break;
- case VT596_WORD_DATA:
- case VT596_PROC_CALL:
- data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
- break;
- case VT596_I2C_BLOCK_DATA:
- case VT596_BLOCK_DATA:
- data->block[0] = inb_p(SMBHSTDAT0);
- if (data->block[0] > I2C_SMBUS_BLOCK_MAX)
- data->block[0] = I2C_SMBUS_BLOCK_MAX;
- inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */
- for (i = 1; i <= data->block[0]; i++)
- data->block[i] = inb_p(SMBBLKDAT);
- break;
- }
- return 0;
-
-exit_unsupported:
- dev_warn(&vt596_adapter.dev, "Unsupported transaction %d\n",
- size);
- return -EOPNOTSUPP;
-}
-
-static u32 vt596_func(struct i2c_adapter *adapter)
-{
- u32 func = I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
- I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
- I2C_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_DATA;
-
- if (vt596_features & FEATURE_I2CBLOCK)
- func |= I2C_FUNC_SMBUS_I2C_BLOCK;
- return func;
-}
-
-static const struct i2c_algorithm smbus_algorithm = {
- .smbus_xfer = vt596_access,
- .functionality = vt596_func,
-};
-
-static struct i2c_adapter vt596_adapter = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo = &smbus_algorithm,
-};
-
-static int __devinit vt596_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- unsigned char temp;
- int error;
-
- /* Determine the address of the SMBus areas */
- if (force_addr) {
- vt596_smba = force_addr & 0xfff0;
- force = 0;
- goto found;
- }
-
- if ((pci_read_config_word(pdev, id->driver_data, &vt596_smba)) ||
- !(vt596_smba & 0x0001)) {
- /* try 2nd address and config reg. for 596 */
- if (id->device == PCI_DEVICE_ID_VIA_82C596_3 &&
- !pci_read_config_word(pdev, SMBBA2, &vt596_smba) &&
- (vt596_smba & 0x0001)) {
- SMBHSTCFG = 0x84;
- } else {
- /* no matches at all */
- dev_err(&pdev->dev, "Cannot configure "
- "SMBus I/O Base address\n");
- return -ENODEV;
- }
- }
-
- vt596_smba &= 0xfff0;
- if (vt596_smba == 0) {
- dev_err(&pdev->dev, "SMBus base address "
- "uninitialized - upgrade BIOS or use "
- "force_addr=0xaddr\n");
- return -ENODEV;
- }
-
-found:
- error = acpi_check_region(vt596_smba, 8, vt596_driver.name);
- if (error)
- return -ENODEV;
-
- if (!request_region(vt596_smba, 8, vt596_driver.name)) {
- dev_err(&pdev->dev, "SMBus region 0x%x already in use!\n",
- vt596_smba);
- return -ENODEV;
- }
-
- pci_read_config_byte(pdev, SMBHSTCFG, &temp);
- /* If force_addr is set, we program the new address here. Just to make
- sure, we disable the VT596 first. */
- if (force_addr) {
- pci_write_config_byte(pdev, SMBHSTCFG, temp & 0xfe);
- pci_write_config_word(pdev, id->driver_data, vt596_smba);
- pci_write_config_byte(pdev, SMBHSTCFG, temp | 0x01);
- dev_warn(&pdev->dev, "WARNING: SMBus interface set to new "
- "address 0x%04x!\n", vt596_smba);
- } else if (!(temp & 0x01)) {
- if (force) {
- /* NOTE: This assumes I/O space and other allocations
- * WERE done by the Bios! Don't complain if your
- * hardware does weird things after enabling this.
- * :') Check for Bios updates before resorting to
- * this.
- */
- pci_write_config_byte(pdev, SMBHSTCFG, temp | 0x01);
- dev_info(&pdev->dev, "Enabling SMBus device\n");
- } else {
- dev_err(&pdev->dev, "SMBUS: Error: Host SMBus "
- "controller not enabled! - upgrade BIOS or "
- "use force=1\n");
- error = -ENODEV;
- goto release_region;
- }
- }
-
- dev_dbg(&pdev->dev, "VT596_smba = 0x%X\n", vt596_smba);
-
- switch (pdev->device) {
- case PCI_DEVICE_ID_VIA_CX700:
- case PCI_DEVICE_ID_VIA_VX800:
- case PCI_DEVICE_ID_VIA_VX855:
- case PCI_DEVICE_ID_VIA_8251:
- case PCI_DEVICE_ID_VIA_8237:
- case PCI_DEVICE_ID_VIA_8237A:
- case PCI_DEVICE_ID_VIA_8237S:
- case PCI_DEVICE_ID_VIA_8235:
- case PCI_DEVICE_ID_VIA_8233A:
- case PCI_DEVICE_ID_VIA_8233_0:
- vt596_features |= FEATURE_I2CBLOCK;
- break;
- case PCI_DEVICE_ID_VIA_82C686_4:
- /* The VT82C686B (rev 0x40) does support I2C block
- transactions, but the VT82C686A (rev 0x30) doesn't */
- if (pdev->revision >= 0x40)
- vt596_features |= FEATURE_I2CBLOCK;
- break;
- }
-
- vt596_adapter.dev.parent = &pdev->dev;
- snprintf(vt596_adapter.name, sizeof(vt596_adapter.name),
- "SMBus Via Pro adapter at %04x", vt596_smba);
-
- vt596_pdev = pci_dev_get(pdev);
- error = i2c_add_adapter(&vt596_adapter);
- if (error) {
- pci_dev_put(vt596_pdev);
- vt596_pdev = NULL;
- goto release_region;
- }
-
- /* Always return failure here. This is to allow other drivers to bind
- * to this pci device. We don't really want to have control over the
- * pci device, we only wanted to read as few register values from it.
- */
- return -ENODEV;
-
-release_region:
- release_region(vt596_smba, 8);
- return error;
-}
-
-static DEFINE_PCI_DEVICE_TABLE(vt596_ids) = {
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596_3),
- .driver_data = SMBBA1 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596B_3),
- .driver_data = SMBBA1 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4),
- .driver_data = SMBBA1 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_0),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233A),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237A),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237S),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4),
- .driver_data = SMBBA1 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8251),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX800),
- .driver_data = SMBBA3 },
- { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX855),
- .driver_data = SMBBA3 },
- { 0, }
-};
-
-MODULE_DEVICE_TABLE(pci, vt596_ids);
-
-static struct pci_driver vt596_driver = {
- .name = "vt596_smbus",
- .id_table = vt596_ids,
- .probe = vt596_probe,
-};
-
-static int __init i2c_vt596_init(void)
-{
- return pci_register_driver(&vt596_driver);
-}
-
-
-static void __exit i2c_vt596_exit(void)
-{
- pci_unregister_driver(&vt596_driver);
- if (vt596_pdev != NULL) {
- i2c_del_adapter(&vt596_adapter);
- release_region(vt596_smba, 8);
- pci_dev_put(vt596_pdev);
- vt596_pdev = NULL;
- }
-}
-
-MODULE_AUTHOR("Kyosti Malkki <kmalkki@cc.hut.fi>, "
- "Mark D. Studebaker <mdsxyz123@yahoo.com> and "
- "Jean Delvare <khali@linux-fr.org>");
-MODULE_DESCRIPTION("vt82c596 SMBus driver");
-MODULE_LICENSE("GPL");
-
-module_init(i2c_vt596_init);
-module_exit(i2c_vt596_exit);
generated by cgit (git 2.34.1) at 2025-03-30 20:26:28 +0000