summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd756.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-amd756.c')
-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-amd756.c430
1 files changed, 0 insertions, 430 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd756.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd756.c
deleted file mode 100644
index eb778bf1..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-amd756.c
+++ /dev/null
@@ -1,430 +0,0 @@
-/*
- Copyright (c) 1999-2002 Merlin Hughes <merlin@merlin.org>
-
- Shamelessly ripped from i2c-piix4.c:
-
- Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
- Philip Edelbrock <phil@netroedge.com>
-
- 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.
-*/
-
-/*
- 2002-04-08: Added nForce support. (Csaba Halasz)
- 2002-10-03: Fixed nForce PnP I/O port. (Michael Steil)
- 2002-12-28: Rewritten into something that resembles a Linux driver (hch)
- 2003-11-29: Added back AMD8111 removed by the previous rewrite.
- (Philip Pokorny)
-*/
-
-/*
- Supports AMD756, AMD766, AMD768, AMD8111 and nVidia nForce
- Note: we assume there can only be one device, with one SMBus interface.
-*/
-
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/delay.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>
-
-/* AMD756 SMBus address offsets */
-#define SMB_ADDR_OFFSET 0xE0
-#define SMB_IOSIZE 16
-#define SMB_GLOBAL_STATUS (0x0 + amd756_ioport)
-#define SMB_GLOBAL_ENABLE (0x2 + amd756_ioport)
-#define SMB_HOST_ADDRESS (0x4 + amd756_ioport)
-#define SMB_HOST_DATA (0x6 + amd756_ioport)
-#define SMB_HOST_COMMAND (0x8 + amd756_ioport)
-#define SMB_HOST_BLOCK_DATA (0x9 + amd756_ioport)
-#define SMB_HAS_DATA (0xA + amd756_ioport)
-#define SMB_HAS_DEVICE_ADDRESS (0xC + amd756_ioport)
-#define SMB_HAS_HOST_ADDRESS (0xE + amd756_ioport)
-#define SMB_SNOOP_ADDRESS (0xF + amd756_ioport)
-
-/* PCI Address Constants */
-
-/* address of I/O space */
-#define SMBBA 0x058 /* mh */
-#define SMBBANFORCE 0x014
-
-/* general configuration */
-#define SMBGCFG 0x041 /* mh */
-
-/* silicon revision code */
-#define SMBREV 0x008
-
-/* Other settings */
-#define MAX_TIMEOUT 500
-
-/* AMD756 constants */
-#define AMD756_QUICK 0x00
-#define AMD756_BYTE 0x01
-#define AMD756_BYTE_DATA 0x02
-#define AMD756_WORD_DATA 0x03
-#define AMD756_PROCESS_CALL 0x04
-#define AMD756_BLOCK_DATA 0x05
-
-static struct pci_driver amd756_driver;
-static unsigned short amd756_ioport;
-
-/*
- SMBUS event = I/O 28-29 bit 11
- see E0 for the status bits and enabled in E2
-
-*/
-#define GS_ABRT_STS (1 << 0)
-#define GS_COL_STS (1 << 1)
-#define GS_PRERR_STS (1 << 2)
-#define GS_HST_STS (1 << 3)
-#define GS_HCYC_STS (1 << 4)
-#define GS_TO_STS (1 << 5)
-#define GS_SMB_STS (1 << 11)
-
-#define GS_CLEAR_STS (GS_ABRT_STS | GS_COL_STS | GS_PRERR_STS | \
- GS_HCYC_STS | GS_TO_STS )
-
-#define GE_CYC_TYPE_MASK (7)
-#define GE_HOST_STC (1 << 3)
-#define GE_ABORT (1 << 5)
-
-
-static int amd756_transaction(struct i2c_adapter *adap)
-{
- int temp;
- int result = 0;
- int timeout = 0;
-
- dev_dbg(&adap->dev, "Transaction (pre): GS=%04x, GE=%04x, ADD=%04x, "
- "DAT=%04x\n", inw_p(SMB_GLOBAL_STATUS),
- inw_p(SMB_GLOBAL_ENABLE), inw_p(SMB_HOST_ADDRESS),
- inb_p(SMB_HOST_DATA));
-
- /* Make sure the SMBus host is ready to start transmitting */
- if ((temp = inw_p(SMB_GLOBAL_STATUS)) & (GS_HST_STS | GS_SMB_STS)) {
- dev_dbg(&adap->dev, "SMBus busy (%04x). Waiting...\n", temp);
- do {
- msleep(1);
- temp = inw_p(SMB_GLOBAL_STATUS);
- } while ((temp & (GS_HST_STS | GS_SMB_STS)) &&
- (timeout++ < MAX_TIMEOUT));
- /* If the SMBus is still busy, we give up */
- if (timeout > MAX_TIMEOUT) {
- dev_dbg(&adap->dev, "Busy wait timeout (%04x)\n", temp);
- goto abort;
- }
- timeout = 0;
- }
-
- /* start the transaction by setting the start bit */
- outw_p(inw(SMB_GLOBAL_ENABLE) | GE_HOST_STC, SMB_GLOBAL_ENABLE);
-
- /* We will always wait for a fraction of a second! */
- do {
- msleep(1);
- temp = inw_p(SMB_GLOBAL_STATUS);
- } while ((temp & GS_HST_STS) && (timeout++ < MAX_TIMEOUT));
-
- /* If the SMBus is still busy, we give up */
- if (timeout > MAX_TIMEOUT) {
- dev_dbg(&adap->dev, "Completion timeout!\n");
- goto abort;
- }
-
- if (temp & GS_PRERR_STS) {
- result = -ENXIO;
- dev_dbg(&adap->dev, "SMBus Protocol error (no response)!\n");
- }
-
- if (temp & GS_COL_STS) {
- result = -EIO;
- dev_warn(&adap->dev, "SMBus collision!\n");
- }
-
- if (temp & GS_TO_STS) {
- result = -ETIMEDOUT;
- dev_dbg(&adap->dev, "SMBus protocol timeout!\n");
- }
-
- if (temp & GS_HCYC_STS)
- dev_dbg(&adap->dev, "SMBus protocol success!\n");
-
- outw_p(GS_CLEAR_STS, SMB_GLOBAL_STATUS);
-
-#ifdef DEBUG
- if (((temp = inw_p(SMB_GLOBAL_STATUS)) & GS_CLEAR_STS) != 0x00) {
- dev_dbg(&adap->dev,
- "Failed reset at end of transaction (%04x)\n", temp);
- }
-#endif
-
- dev_dbg(&adap->dev,
- "Transaction (post): GS=%04x, GE=%04x, ADD=%04x, DAT=%04x\n",
- inw_p(SMB_GLOBAL_STATUS), inw_p(SMB_GLOBAL_ENABLE),
- inw_p(SMB_HOST_ADDRESS), inb_p(SMB_HOST_DATA));
-
- return result;
-
- abort:
- dev_warn(&adap->dev, "Sending abort\n");
- outw_p(inw(SMB_GLOBAL_ENABLE) | GE_ABORT, SMB_GLOBAL_ENABLE);
- msleep(100);
- outw_p(GS_CLEAR_STS, SMB_GLOBAL_STATUS);
- return -EIO;
-}
-
-/* Return negative errno on error. */
-static s32 amd756_access(struct i2c_adapter * adap, u16 addr,
- unsigned short flags, char read_write,
- u8 command, int size, union i2c_smbus_data * data)
-{
- int i, len;
- int status;
-
- switch (size) {
- case I2C_SMBUS_QUICK:
- outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMB_HOST_ADDRESS);
- size = AMD756_QUICK;
- break;
- case I2C_SMBUS_BYTE:
- outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMB_HOST_ADDRESS);
- if (read_write == I2C_SMBUS_WRITE)
- outb_p(command, SMB_HOST_DATA);
- size = AMD756_BYTE;
- break;
- case I2C_SMBUS_BYTE_DATA:
- outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMB_HOST_ADDRESS);
- outb_p(command, SMB_HOST_COMMAND);
- if (read_write == I2C_SMBUS_WRITE)
- outw_p(data->byte, SMB_HOST_DATA);
- size = AMD756_BYTE_DATA;
- break;
- case I2C_SMBUS_WORD_DATA:
- outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMB_HOST_ADDRESS);
- outb_p(command, SMB_HOST_COMMAND);
- if (read_write == I2C_SMBUS_WRITE)
- outw_p(data->word, SMB_HOST_DATA); /* TODO: endian???? */
- size = AMD756_WORD_DATA;
- break;
- case I2C_SMBUS_BLOCK_DATA:
- outw_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMB_HOST_ADDRESS);
- outb_p(command, SMB_HOST_COMMAND);
- if (read_write == I2C_SMBUS_WRITE) {
- len = data->block[0];
- if (len < 0)
- len = 0;
- if (len > 32)
- len = 32;
- outw_p(len, SMB_HOST_DATA);
- /* i = inw_p(SMBHSTCNT); Reset SMBBLKDAT */
- for (i = 1; i <= len; i++)
- outb_p(data->block[i],
- SMB_HOST_BLOCK_DATA);
- }
- size = AMD756_BLOCK_DATA;
- break;
- default:
- dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
- return -EOPNOTSUPP;
- }
-
- /* How about enabling interrupts... */
- outw_p(size & GE_CYC_TYPE_MASK, SMB_GLOBAL_ENABLE);
-
- status = amd756_transaction(adap);
- if (status)
- return status;
-
- if ((read_write == I2C_SMBUS_WRITE) || (size == AMD756_QUICK))
- return 0;
-
-
- switch (size) {
- case AMD756_BYTE:
- data->byte = inw_p(SMB_HOST_DATA);
- break;
- case AMD756_BYTE_DATA:
- data->byte = inw_p(SMB_HOST_DATA);
- break;
- case AMD756_WORD_DATA:
- data->word = inw_p(SMB_HOST_DATA); /* TODO: endian???? */
- break;
- case AMD756_BLOCK_DATA:
- data->block[0] = inw_p(SMB_HOST_DATA) & 0x3f;
- if(data->block[0] > 32)
- data->block[0] = 32;
- /* i = inw_p(SMBHSTCNT); Reset SMBBLKDAT */
- for (i = 1; i <= data->block[0]; i++)
- data->block[i] = inb_p(SMB_HOST_BLOCK_DATA);
- break;
- }
-
- return 0;
-}
-
-static u32 amd756_func(struct i2c_adapter *adapter)
-{
- return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
- I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
- I2C_FUNC_SMBUS_BLOCK_DATA;
-}
-
-static const struct i2c_algorithm smbus_algorithm = {
- .smbus_xfer = amd756_access,
- .functionality = amd756_func,
-};
-
-struct i2c_adapter amd756_smbus = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo = &smbus_algorithm,
-};
-
-enum chiptype { AMD756, AMD766, AMD768, NFORCE, AMD8111 };
-static const char* chipname[] = {
- "AMD756", "AMD766", "AMD768",
- "nVidia nForce", "AMD8111",
-};
-
-static DEFINE_PCI_DEVICE_TABLE(amd756_ids) = {
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_740B),
- .driver_data = AMD756 },
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7413),
- .driver_data = AMD766 },
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_OPUS_7443),
- .driver_data = AMD768 },
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS),
- .driver_data = AMD8111 },
- { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_SMBUS),
- .driver_data = NFORCE },
- { 0, }
-};
-
-MODULE_DEVICE_TABLE (pci, amd756_ids);
-
-static int __devinit amd756_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- int nforce = (id->driver_data == NFORCE);
- int error;
- u8 temp;
-
- if (amd756_ioport) {
- dev_err(&pdev->dev, "Only one device supported "
- "(you have a strange motherboard, btw)\n");
- return -ENODEV;
- }
-
- if (nforce) {
- if (PCI_FUNC(pdev->devfn) != 1)
- return -ENODEV;
-
- pci_read_config_word(pdev, SMBBANFORCE, &amd756_ioport);
- amd756_ioport &= 0xfffc;
- } else { /* amd */
- if (PCI_FUNC(pdev->devfn) != 3)
- return -ENODEV;
-
- pci_read_config_byte(pdev, SMBGCFG, &temp);
- if ((temp & 128) == 0) {
- dev_err(&pdev->dev,
- "Error: SMBus controller I/O not enabled!\n");
- return -ENODEV;
- }
-
- /* Determine the address of the SMBus areas */
- /* Technically it is a dword but... */
- pci_read_config_word(pdev, SMBBA, &amd756_ioport);
- amd756_ioport &= 0xff00;
- amd756_ioport += SMB_ADDR_OFFSET;
- }
-
- error = acpi_check_region(amd756_ioport, SMB_IOSIZE,
- amd756_driver.name);
- if (error)
- return -ENODEV;
-
- if (!request_region(amd756_ioport, SMB_IOSIZE, amd756_driver.name)) {
- dev_err(&pdev->dev, "SMB region 0x%x already in use!\n",
- amd756_ioport);
- return -ENODEV;
- }
-
- pci_read_config_byte(pdev, SMBREV, &temp);
- dev_dbg(&pdev->dev, "SMBREV = 0x%X\n", temp);
- dev_dbg(&pdev->dev, "AMD756_smba = 0x%X\n", amd756_ioport);
-
- /* set up the sysfs linkage to our parent device */
- amd756_smbus.dev.parent = &pdev->dev;
-
- snprintf(amd756_smbus.name, sizeof(amd756_smbus.name),
- "SMBus %s adapter at %04x", chipname[id->driver_data],
- amd756_ioport);
-
- error = i2c_add_adapter(&amd756_smbus);
- if (error) {
- dev_err(&pdev->dev,
- "Adapter registration failed, module not inserted\n");
- goto out_err;
- }
-
- return 0;
-
- out_err:
- release_region(amd756_ioport, SMB_IOSIZE);
- return error;
-}
-
-static void __devexit amd756_remove(struct pci_dev *dev)
-{
- i2c_del_adapter(&amd756_smbus);
- release_region(amd756_ioport, SMB_IOSIZE);
-}
-
-static struct pci_driver amd756_driver = {
- .name = "amd756_smbus",
- .id_table = amd756_ids,
- .probe = amd756_probe,
- .remove = __devexit_p(amd756_remove),
-};
-
-static int __init amd756_init(void)
-{
- return pci_register_driver(&amd756_driver);
-}
-
-static void __exit amd756_exit(void)
-{
- pci_unregister_driver(&amd756_driver);
-}
-
-MODULE_AUTHOR("Merlin Hughes <merlin@merlin.org>");
-MODULE_DESCRIPTION("AMD756/766/768/8111 and nVidia nForce SMBus driver");
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(amd756_smbus);
-
-module_init(amd756_init)
-module_exit(amd756_exit)
generated by cgit (git 2.34.1) at 2025-03-30 20:24:35 +0000