diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-i801.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-i801.c | 949 |
1 files changed, 0 insertions, 949 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-i801.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-i801.c deleted file mode 100644 index ae2945a5..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-i801.c +++ /dev/null @@ -1,949 +0,0 @@ -/* - Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, - Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker - <mdsxyz123@yahoo.com> - Copyright (C) 2007 - 2012 Jean Delvare <khali@linux-fr.org> - Copyright (C) 2010 Intel Corporation, - David Woodhouse <dwmw2@infradead.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 Intel I/O Controller Hubs (ICH): - - I/O Block I2C - region SMBus Block proc. block - Chip name PCI ID size PEC buffer call read - ---------------------------------------------------------------------- - 82801AA (ICH) 0x2413 16 no no no no - 82801AB (ICH0) 0x2423 16 no no no no - 82801BA (ICH2) 0x2443 16 no no no no - 82801CA (ICH3) 0x2483 32 soft no no no - 82801DB (ICH4) 0x24c3 32 hard yes no no - 82801E (ICH5) 0x24d3 32 hard yes yes yes - 6300ESB 0x25a4 32 hard yes yes yes - 82801F (ICH6) 0x266a 32 hard yes yes yes - 6310ESB/6320ESB 0x269b 32 hard yes yes yes - 82801G (ICH7) 0x27da 32 hard yes yes yes - 82801H (ICH8) 0x283e 32 hard yes yes yes - 82801I (ICH9) 0x2930 32 hard yes yes yes - EP80579 (Tolapai) 0x5032 32 hard yes yes yes - ICH10 0x3a30 32 hard yes yes yes - ICH10 0x3a60 32 hard yes yes yes - 5/3400 Series (PCH) 0x3b30 32 hard yes yes yes - 6 Series (PCH) 0x1c22 32 hard yes yes yes - Patsburg (PCH) 0x1d22 32 hard yes yes yes - Patsburg (PCH) IDF 0x1d70 32 hard yes yes yes - Patsburg (PCH) IDF 0x1d71 32 hard yes yes yes - Patsburg (PCH) IDF 0x1d72 32 hard yes yes yes - DH89xxCC (PCH) 0x2330 32 hard yes yes yes - Panther Point (PCH) 0x1e22 32 hard yes yes yes - Lynx Point (PCH) 0x8c22 32 hard yes yes yes - - Features supported by this driver: - Software PEC no - Hardware PEC yes - Block buffer yes - Block process call transaction no - I2C block read transaction yes (doesn't use the block buffer) - Slave mode no - - See the file Documentation/i2c/busses/i2c-i801 for details. -*/ - -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/stddef.h> -#include <linux/delay.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/acpi.h> -#include <linux/io.h> -#include <linux/dmi.h> -#include <linux/slab.h> - -/* I801 SMBus address offsets */ -#define SMBHSTSTS(p) (0 + (p)->smba) -#define SMBHSTCNT(p) (2 + (p)->smba) -#define SMBHSTCMD(p) (3 + (p)->smba) -#define SMBHSTADD(p) (4 + (p)->smba) -#define SMBHSTDAT0(p) (5 + (p)->smba) -#define SMBHSTDAT1(p) (6 + (p)->smba) -#define SMBBLKDAT(p) (7 + (p)->smba) -#define SMBPEC(p) (8 + (p)->smba) /* ICH3 and later */ -#define SMBAUXSTS(p) (12 + (p)->smba) /* ICH4 and later */ -#define SMBAUXCTL(p) (13 + (p)->smba) /* ICH4 and later */ - -/* PCI Address Constants */ -#define SMBBAR 4 -#define SMBHSTCFG 0x040 - -/* Host configuration bits for SMBHSTCFG */ -#define SMBHSTCFG_HST_EN 1 -#define SMBHSTCFG_SMB_SMI_EN 2 -#define SMBHSTCFG_I2C_EN 4 - -/* Auxiliary control register bits, ICH4+ only */ -#define SMBAUXCTL_CRC 1 -#define SMBAUXCTL_E32B 2 - -/* kill bit for SMBHSTCNT */ -#define SMBHSTCNT_KILL 2 - -/* Other settings */ -#define MAX_RETRIES 400 -#define ENABLE_INT9 0 /* set to 0x01 to enable - untested */ - -/* I801 command constants */ -#define I801_QUICK 0x00 -#define I801_BYTE 0x04 -#define I801_BYTE_DATA 0x08 -#define I801_WORD_DATA 0x0C -#define I801_PROC_CALL 0x10 /* unimplemented */ -#define I801_BLOCK_DATA 0x14 -#define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */ -#define I801_BLOCK_LAST 0x34 -#define I801_I2C_BLOCK_LAST 0x38 /* ICH5 and later */ -#define I801_START 0x40 -#define I801_PEC_EN 0x80 /* ICH3 and later */ - -/* I801 Hosts Status register bits */ -#define SMBHSTSTS_BYTE_DONE 0x80 -#define SMBHSTSTS_INUSE_STS 0x40 -#define SMBHSTSTS_SMBALERT_STS 0x20 -#define SMBHSTSTS_FAILED 0x10 -#define SMBHSTSTS_BUS_ERR 0x08 -#define SMBHSTSTS_DEV_ERR 0x04 -#define SMBHSTSTS_INTR 0x02 -#define SMBHSTSTS_HOST_BUSY 0x01 - -#define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_FAILED | \ - SMBHSTSTS_BUS_ERR | SMBHSTSTS_DEV_ERR | \ - SMBHSTSTS_INTR) - -/* Older devices have their ID defined in <linux/pci_ids.h> */ -#define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS 0x1c22 -#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS 0x1d22 -/* Patsburg also has three 'Integrated Device Function' SMBus controllers */ -#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0 0x1d70 -#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1 0x1d71 -#define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2 0x1d72 -#define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS 0x1e22 -#define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330 -#define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30 -#define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22 - -struct i801_priv { - struct i2c_adapter adapter; - unsigned long smba; - unsigned char original_hstcfg; - struct pci_dev *pci_dev; - unsigned int features; -}; - -static struct pci_driver i801_driver; - -#define FEATURE_SMBUS_PEC (1 << 0) -#define FEATURE_BLOCK_BUFFER (1 << 1) -#define FEATURE_BLOCK_PROC (1 << 2) -#define FEATURE_I2C_BLOCK_READ (1 << 3) -/* Not really a feature, but it's convenient to handle it as such */ -#define FEATURE_IDF (1 << 15) - -static const char *i801_feature_names[] = { - "SMBus PEC", - "Block buffer", - "Block process call", - "I2C block read", -}; - -static unsigned int disable_features; -module_param(disable_features, uint, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(disable_features, "Disable selected driver features"); - -/* Make sure the SMBus host is ready to start transmitting. - Return 0 if it is, -EBUSY if it is not. */ -static int i801_check_pre(struct i801_priv *priv) -{ - int status; - - status = inb_p(SMBHSTSTS(priv)); - if (status & SMBHSTSTS_HOST_BUSY) { - dev_err(&priv->pci_dev->dev, "SMBus is busy, can't use it!\n"); - return -EBUSY; - } - - status &= STATUS_FLAGS; - if (status) { - dev_dbg(&priv->pci_dev->dev, "Clearing status flags (%02x)\n", - status); - outb_p(status, SMBHSTSTS(priv)); - status = inb_p(SMBHSTSTS(priv)) & STATUS_FLAGS; - if (status) { - dev_err(&priv->pci_dev->dev, - "Failed clearing status flags (%02x)\n", - status); - return -EBUSY; - } - } - - return 0; -} - -/* Convert the status register to an error code, and clear it. */ -static int i801_check_post(struct i801_priv *priv, int status, int timeout) -{ - int result = 0; - - /* If the SMBus is still busy, we give up */ - if (timeout) { - dev_err(&priv->pci_dev->dev, "Transaction timeout\n"); - /* try to stop the current command */ - dev_dbg(&priv->pci_dev->dev, "Terminating the current operation\n"); - outb_p(inb_p(SMBHSTCNT(priv)) | SMBHSTCNT_KILL, - SMBHSTCNT(priv)); - usleep_range(1000, 2000); - outb_p(inb_p(SMBHSTCNT(priv)) & (~SMBHSTCNT_KILL), - SMBHSTCNT(priv)); - - /* Check if it worked */ - status = inb_p(SMBHSTSTS(priv)); - if ((status & SMBHSTSTS_HOST_BUSY) || - !(status & SMBHSTSTS_FAILED)) - dev_err(&priv->pci_dev->dev, - "Failed terminating the transaction\n"); - outb_p(STATUS_FLAGS, SMBHSTSTS(priv)); - return -ETIMEDOUT; - } - - if (status & SMBHSTSTS_FAILED) { - result = -EIO; - dev_err(&priv->pci_dev->dev, "Transaction failed\n"); - } - if (status & SMBHSTSTS_DEV_ERR) { - result = -ENXIO; - dev_dbg(&priv->pci_dev->dev, "No response\n"); - } - if (status & SMBHSTSTS_BUS_ERR) { - result = -EAGAIN; - dev_dbg(&priv->pci_dev->dev, "Lost arbitration\n"); - } - - if (result) { - /* Clear error flags */ - outb_p(status & STATUS_FLAGS, SMBHSTSTS(priv)); - status = inb_p(SMBHSTSTS(priv)) & STATUS_FLAGS; - if (status) { - dev_warn(&priv->pci_dev->dev, "Failed clearing status " - "flags at end of transaction (%02x)\n", - status); - } - } - - return result; -} - -static int i801_transaction(struct i801_priv *priv, int xact) -{ - int status; - int result; - int timeout = 0; - - result = i801_check_pre(priv); - if (result < 0) - return result; - - /* the current contents of SMBHSTCNT can be overwritten, since PEC, - * INTREN, SMBSCMD are passed in xact */ - outb_p(xact | I801_START, SMBHSTCNT(priv)); - - /* We will always wait for a fraction of a second! */ - do { - usleep_range(250, 500); - status = inb_p(SMBHSTSTS(priv)); - } while ((status & SMBHSTSTS_HOST_BUSY) && (timeout++ < MAX_RETRIES)); - - result = i801_check_post(priv, status, timeout > MAX_RETRIES); - if (result < 0) - return result; - - outb_p(SMBHSTSTS_INTR, SMBHSTSTS(priv)); - return 0; -} - -/* wait for INTR bit as advised by Intel */ -static void i801_wait_hwpec(struct i801_priv *priv) -{ - int timeout = 0; - int status; - - do { - usleep_range(250, 500); - status = inb_p(SMBHSTSTS(priv)); - } while ((!(status & SMBHSTSTS_INTR)) - && (timeout++ < MAX_RETRIES)); - - if (timeout > MAX_RETRIES) - dev_dbg(&priv->pci_dev->dev, "PEC Timeout!\n"); - - outb_p(status, SMBHSTSTS(priv)); -} - -static int i801_block_transaction_by_block(struct i801_priv *priv, - union i2c_smbus_data *data, - char read_write, int hwpec) -{ - int i, len; - int status; - - inb_p(SMBHSTCNT(priv)); /* reset the data buffer index */ - - /* Use 32-byte buffer to process this transaction */ - if (read_write == I2C_SMBUS_WRITE) { - len = data->block[0]; - outb_p(len, SMBHSTDAT0(priv)); - for (i = 0; i < len; i++) - outb_p(data->block[i+1], SMBBLKDAT(priv)); - } - - status = i801_transaction(priv, I801_BLOCK_DATA | ENABLE_INT9 | - I801_PEC_EN * hwpec); - if (status) - return status; - - if (read_write == I2C_SMBUS_READ) { - len = inb_p(SMBHSTDAT0(priv)); - if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) - return -EPROTO; - - data->block[0] = len; - for (i = 0; i < len; i++) - data->block[i + 1] = inb_p(SMBBLKDAT(priv)); - } - return 0; -} - -static int i801_block_transaction_byte_by_byte(struct i801_priv *priv, - union i2c_smbus_data *data, - char read_write, int command, - int hwpec) -{ - int i, len; - int smbcmd; - int status; - int result; - int timeout; - - result = i801_check_pre(priv); - if (result < 0) - return result; - - len = data->block[0]; - - if (read_write == I2C_SMBUS_WRITE) { - outb_p(len, SMBHSTDAT0(priv)); - outb_p(data->block[1], SMBBLKDAT(priv)); - } - - for (i = 1; i <= len; i++) { - if (i == len && read_write == I2C_SMBUS_READ) { - if (command == I2C_SMBUS_I2C_BLOCK_DATA) - smbcmd = I801_I2C_BLOCK_LAST; - else - smbcmd = I801_BLOCK_LAST; - } else { - if (command == I2C_SMBUS_I2C_BLOCK_DATA - && read_write == I2C_SMBUS_READ) - smbcmd = I801_I2C_BLOCK_DATA; - else - smbcmd = I801_BLOCK_DATA; - } - outb_p(smbcmd | ENABLE_INT9, SMBHSTCNT(priv)); - - if (i == 1) - outb_p(inb(SMBHSTCNT(priv)) | I801_START, - SMBHSTCNT(priv)); - - /* We will always wait for a fraction of a second! */ - timeout = 0; - do { - usleep_range(250, 500); - status = inb_p(SMBHSTSTS(priv)); - } while ((!(status & SMBHSTSTS_BYTE_DONE)) - && (timeout++ < MAX_RETRIES)); - - result = i801_check_post(priv, status, timeout > MAX_RETRIES); - if (result < 0) - return result; - - if (i == 1 && read_write == I2C_SMBUS_READ - && command != I2C_SMBUS_I2C_BLOCK_DATA) { - len = inb_p(SMBHSTDAT0(priv)); - if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) { - dev_err(&priv->pci_dev->dev, - "Illegal SMBus block read size %d\n", - len); - /* Recover */ - while (inb_p(SMBHSTSTS(priv)) & - SMBHSTSTS_HOST_BUSY) - outb_p(SMBHSTSTS_BYTE_DONE, - SMBHSTSTS(priv)); - outb_p(SMBHSTSTS_INTR, SMBHSTSTS(priv)); - return -EPROTO; - } - data->block[0] = len; - } - - /* Retrieve/store value in SMBBLKDAT */ - if (read_write == I2C_SMBUS_READ) - data->block[i] = inb_p(SMBBLKDAT(priv)); - if (read_write == I2C_SMBUS_WRITE && i+1 <= len) - outb_p(data->block[i+1], SMBBLKDAT(priv)); - - /* signals SMBBLKDAT ready */ - outb_p(SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR, SMBHSTSTS(priv)); - } - - return 0; -} - -static int i801_set_block_buffer_mode(struct i801_priv *priv) -{ - outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_E32B, SMBAUXCTL(priv)); - if ((inb_p(SMBAUXCTL(priv)) & SMBAUXCTL_E32B) == 0) - return -EIO; - return 0; -} - -/* Block transaction function */ -static int i801_block_transaction(struct i801_priv *priv, - union i2c_smbus_data *data, char read_write, - int command, int hwpec) -{ - int result = 0; - unsigned char hostc; - - if (command == I2C_SMBUS_I2C_BLOCK_DATA) { - if (read_write == I2C_SMBUS_WRITE) { - /* set I2C_EN bit in configuration register */ - pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &hostc); - pci_write_config_byte(priv->pci_dev, SMBHSTCFG, - hostc | SMBHSTCFG_I2C_EN); - } else if (!(priv->features & FEATURE_I2C_BLOCK_READ)) { - dev_err(&priv->pci_dev->dev, - "I2C block read is unsupported!\n"); - return -EOPNOTSUPP; - } - } - - if (read_write == I2C_SMBUS_WRITE - || command == I2C_SMBUS_I2C_BLOCK_DATA) { - if (data->block[0] < 1) - data->block[0] = 1; - if (data->block[0] > I2C_SMBUS_BLOCK_MAX) - data->block[0] = I2C_SMBUS_BLOCK_MAX; - } else { - data->block[0] = 32; /* max for SMBus block reads */ - } - - /* Experience has shown that the block buffer can only be used for - SMBus (not I2C) block transactions, even though the datasheet - doesn't mention this limitation. */ - if ((priv->features & FEATURE_BLOCK_BUFFER) - && command != I2C_SMBUS_I2C_BLOCK_DATA - && i801_set_block_buffer_mode(priv) == 0) - result = i801_block_transaction_by_block(priv, data, - read_write, hwpec); - else - result = i801_block_transaction_byte_by_byte(priv, data, - read_write, - command, hwpec); - - if (result == 0 && hwpec) - i801_wait_hwpec(priv); - - if (command == I2C_SMBUS_I2C_BLOCK_DATA - && read_write == I2C_SMBUS_WRITE) { - /* restore saved configuration register value */ - pci_write_config_byte(priv->pci_dev, SMBHSTCFG, hostc); - } - return result; -} - -/* Return negative errno on error. */ -static s32 i801_access(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, u8 command, - int size, union i2c_smbus_data *data) -{ - int hwpec; - int block = 0; - int ret, xact = 0; - struct i801_priv *priv = i2c_get_adapdata(adap); - - hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC) - && size != I2C_SMBUS_QUICK - && size != I2C_SMBUS_I2C_BLOCK_DATA; - - switch (size) { - case I2C_SMBUS_QUICK: - outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), - SMBHSTADD(priv)); - xact = I801_QUICK; - break; - case I2C_SMBUS_BYTE: - outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), - SMBHSTADD(priv)); - if (read_write == I2C_SMBUS_WRITE) - outb_p(command, SMBHSTCMD(priv)); - xact = I801_BYTE; - break; - case I2C_SMBUS_BYTE_DATA: - outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), - SMBHSTADD(priv)); - outb_p(command, SMBHSTCMD(priv)); - if (read_write == I2C_SMBUS_WRITE) - outb_p(data->byte, SMBHSTDAT0(priv)); - xact = I801_BYTE_DATA; - break; - case I2C_SMBUS_WORD_DATA: - outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), - SMBHSTADD(priv)); - outb_p(command, SMBHSTCMD(priv)); - if (read_write == I2C_SMBUS_WRITE) { - outb_p(data->word & 0xff, SMBHSTDAT0(priv)); - outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1(priv)); - } - xact = I801_WORD_DATA; - break; - case I2C_SMBUS_BLOCK_DATA: - outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), - SMBHSTADD(priv)); - outb_p(command, SMBHSTCMD(priv)); - block = 1; - break; - case I2C_SMBUS_I2C_BLOCK_DATA: - /* NB: page 240 of ICH5 datasheet shows that the R/#W - * bit should be cleared here, even when reading */ - outb_p((addr & 0x7f) << 1, SMBHSTADD(priv)); - if (read_write == I2C_SMBUS_READ) { - /* NB: page 240 of ICH5 datasheet also shows - * that DATA1 is the cmd field when reading */ - outb_p(command, SMBHSTDAT1(priv)); - } else - outb_p(command, SMBHSTCMD(priv)); - block = 1; - break; - default: - dev_err(&priv->pci_dev->dev, "Unsupported transaction %d\n", - size); - return -EOPNOTSUPP; - } - - if (hwpec) /* enable/disable hardware PEC */ - outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_CRC, SMBAUXCTL(priv)); - else - outb_p(inb_p(SMBAUXCTL(priv)) & (~SMBAUXCTL_CRC), - SMBAUXCTL(priv)); - - if (block) - ret = i801_block_transaction(priv, data, read_write, size, - hwpec); - else - ret = i801_transaction(priv, xact | ENABLE_INT9); - - /* Some BIOSes don't like it when PEC is enabled at reboot or resume - time, so we forcibly disable it after every transaction. Turn off - E32B for the same reason. */ - if (hwpec || block) - outb_p(inb_p(SMBAUXCTL(priv)) & - ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv)); - - if (block) - return ret; - if (ret) - return ret; - if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK)) - return 0; - - switch (xact & 0x7f) { - case I801_BYTE: /* Result put in SMBHSTDAT0 */ - case I801_BYTE_DATA: - data->byte = inb_p(SMBHSTDAT0(priv)); - break; - case I801_WORD_DATA: - data->word = inb_p(SMBHSTDAT0(priv)) + - (inb_p(SMBHSTDAT1(priv)) << 8); - break; - } - return 0; -} - - -static u32 i801_func(struct i2c_adapter *adapter) -{ - struct i801_priv *priv = i2c_get_adapdata(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 | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK | - ((priv->features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) | - ((priv->features & FEATURE_I2C_BLOCK_READ) ? - I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0); -} - -static const struct i2c_algorithm smbus_algorithm = { - .smbus_xfer = i801_access, - .functionality = i801_func, -}; - -static DEFINE_PCI_DEVICE_TABLE(i801_ids) = { - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EP80579_1) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_4) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_5) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS) }, - { 0, } -}; - -MODULE_DEVICE_TABLE(pci, i801_ids); - -#if defined CONFIG_X86 && defined CONFIG_DMI -static unsigned char apanel_addr; - -/* Scan the system ROM for the signature "FJKEYINF" */ -static __init const void __iomem *bios_signature(const void __iomem *bios) -{ - ssize_t offset; - const unsigned char signature[] = "FJKEYINF"; - - for (offset = 0; offset < 0x10000; offset += 0x10) { - if (check_signature(bios + offset, signature, - sizeof(signature)-1)) - return bios + offset; - } - return NULL; -} - -static void __init input_apanel_init(void) -{ - void __iomem *bios; - const void __iomem *p; - - bios = ioremap(0xF0000, 0x10000); /* Can't fail */ - p = bios_signature(bios); - if (p) { - /* just use the first address */ - apanel_addr = readb(p + 8 + 3) >> 1; - } - iounmap(bios); -} - -struct dmi_onboard_device_info { - const char *name; - u8 type; - unsigned short i2c_addr; - const char *i2c_type; -}; - -static struct dmi_onboard_device_info __devinitdata dmi_devices[] = { - { "Syleus", DMI_DEV_TYPE_OTHER, 0x73, "fscsyl" }, - { "Hermes", DMI_DEV_TYPE_OTHER, 0x73, "fscher" }, - { "Hades", DMI_DEV_TYPE_OTHER, 0x73, "fschds" }, -}; - -static void __devinit dmi_check_onboard_device(u8 type, const char *name, - struct i2c_adapter *adap) -{ - int i; - struct i2c_board_info info; - - for (i = 0; i < ARRAY_SIZE(dmi_devices); i++) { - /* & ~0x80, ignore enabled/disabled bit */ - if ((type & ~0x80) != dmi_devices[i].type) - continue; - if (strcasecmp(name, dmi_devices[i].name)) - continue; - - memset(&info, 0, sizeof(struct i2c_board_info)); - info.addr = dmi_devices[i].i2c_addr; - strlcpy(info.type, dmi_devices[i].i2c_type, I2C_NAME_SIZE); - i2c_new_device(adap, &info); - break; - } -} - -/* We use our own function to check for onboard devices instead of - dmi_find_device() as some buggy BIOS's have the devices we are interested - in marked as disabled */ -static void __devinit dmi_check_onboard_devices(const struct dmi_header *dm, - void *adap) -{ - int i, count; - - if (dm->type != 10) - return; - - count = (dm->length - sizeof(struct dmi_header)) / 2; - for (i = 0; i < count; i++) { - const u8 *d = (char *)(dm + 1) + (i * 2); - const char *name = ((char *) dm) + dm->length; - u8 type = d[0]; - u8 s = d[1]; - - if (!s) - continue; - s--; - while (s > 0 && name[0]) { - name += strlen(name) + 1; - s--; - } - if (name[0] == 0) /* Bogus string reference */ - continue; - - dmi_check_onboard_device(type, name, adap); - } -} - -/* Register optional slaves */ -static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) -{ - /* Only register slaves on main SMBus channel */ - if (priv->features & FEATURE_IDF) - return; - - if (apanel_addr) { - struct i2c_board_info info; - - memset(&info, 0, sizeof(struct i2c_board_info)); - info.addr = apanel_addr; - strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE); - i2c_new_device(&priv->adapter, &info); - } - - if (dmi_name_in_vendors("FUJITSU")) - dmi_walk(dmi_check_onboard_devices, &priv->adapter); -} -#else -static void __init input_apanel_init(void) {} -static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) {} -#endif /* CONFIG_X86 && CONFIG_DMI */ - -static int __devinit i801_probe(struct pci_dev *dev, - const struct pci_device_id *id) -{ - unsigned char temp; - int err, i; - struct i801_priv *priv; - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - i2c_set_adapdata(&priv->adapter, priv); - priv->adapter.owner = THIS_MODULE; - priv->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; - priv->adapter.algo = &smbus_algorithm; - - priv->pci_dev = dev; - switch (dev->device) { - case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0: - case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1: - case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2: - priv->features |= FEATURE_IDF; - /* fall through */ - default: - priv->features |= FEATURE_I2C_BLOCK_READ; - /* fall through */ - case PCI_DEVICE_ID_INTEL_82801DB_3: - priv->features |= FEATURE_SMBUS_PEC; - priv->features |= FEATURE_BLOCK_BUFFER; - /* fall through */ - case PCI_DEVICE_ID_INTEL_82801CA_3: - case PCI_DEVICE_ID_INTEL_82801BA_2: - case PCI_DEVICE_ID_INTEL_82801AB_3: - case PCI_DEVICE_ID_INTEL_82801AA_3: - break; - } - - /* Disable features on user request */ - for (i = 0; i < ARRAY_SIZE(i801_feature_names); i++) { - if (priv->features & disable_features & (1 << i)) - dev_notice(&dev->dev, "%s disabled by user\n", - i801_feature_names[i]); - } - priv->features &= ~disable_features; - - err = pci_enable_device(dev); - if (err) { - dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n", - err); - goto exit; - } - - /* Determine the address of the SMBus area */ - priv->smba = pci_resource_start(dev, SMBBAR); - if (!priv->smba) { - dev_err(&dev->dev, "SMBus base address uninitialized, " - "upgrade BIOS\n"); - err = -ENODEV; - goto exit; - } - - err = acpi_check_resource_conflict(&dev->resource[SMBBAR]); - if (err) { - err = -ENODEV; - goto exit; - } - - err = pci_request_region(dev, SMBBAR, i801_driver.name); - if (err) { - dev_err(&dev->dev, "Failed to request SMBus region " - "0x%lx-0x%Lx\n", priv->smba, - (unsigned long long)pci_resource_end(dev, SMBBAR)); - goto exit; - } - - pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &temp); - priv->original_hstcfg = temp; - temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */ - if (!(temp & SMBHSTCFG_HST_EN)) { - dev_info(&dev->dev, "Enabling SMBus device\n"); - temp |= SMBHSTCFG_HST_EN; - } - pci_write_config_byte(priv->pci_dev, SMBHSTCFG, temp); - - if (temp & SMBHSTCFG_SMB_SMI_EN) - dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n"); - else - dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n"); - - /* Clear special mode bits */ - if (priv->features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER)) - outb_p(inb_p(SMBAUXCTL(priv)) & - ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv)); - - /* set up the sysfs linkage to our parent device */ - priv->adapter.dev.parent = &dev->dev; - - /* Retry up to 3 times on lost arbitration */ - priv->adapter.retries = 3; - - snprintf(priv->adapter.name, sizeof(priv->adapter.name), - "SMBus I801 adapter at %04lx", priv->smba); - err = i2c_add_adapter(&priv->adapter); - if (err) { - dev_err(&dev->dev, "Failed to add SMBus adapter\n"); - goto exit_release; - } - - i801_probe_optional_slaves(priv); - - pci_set_drvdata(dev, priv); - return 0; - -exit_release: - pci_release_region(dev, SMBBAR); -exit: - kfree(priv); - return err; -} - -static void __devexit i801_remove(struct pci_dev *dev) -{ - struct i801_priv *priv = pci_get_drvdata(dev); - - i2c_del_adapter(&priv->adapter); - pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg); - pci_release_region(dev, SMBBAR); - pci_set_drvdata(dev, NULL); - kfree(priv); - /* - * do not call pci_disable_device(dev) since it can cause hard hangs on - * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010) - */ -} - -#ifdef CONFIG_PM -static int i801_suspend(struct pci_dev *dev, pm_message_t mesg) -{ - struct i801_priv *priv = pci_get_drvdata(dev); - - pci_save_state(dev); - pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg); - pci_set_power_state(dev, pci_choose_state(dev, mesg)); - return 0; -} - -static int i801_resume(struct pci_dev *dev) -{ - pci_set_power_state(dev, PCI_D0); - pci_restore_state(dev); - return pci_enable_device(dev); -} -#else -#define i801_suspend NULL -#define i801_resume NULL -#endif - -static struct pci_driver i801_driver = { - .name = "i801_smbus", - .id_table = i801_ids, - .probe = i801_probe, - .remove = __devexit_p(i801_remove), - .suspend = i801_suspend, - .resume = i801_resume, -}; - -static int __init i2c_i801_init(void) -{ - if (dmi_name_in_vendors("FUJITSU")) - input_apanel_init(); - return pci_register_driver(&i801_driver); -} - -static void __exit i2c_i801_exit(void) -{ - pci_unregister_driver(&i801_driver); -} - -MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>, " - "Jean Delvare <khali@linux-fr.org>"); -MODULE_DESCRIPTION("I801 SMBus driver"); -MODULE_LICENSE("GPL"); - -module_init(i2c_i801_init); -module_exit(i2c_i801_exit); |