Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jean Delvare | 455f332 | 2006-06-12 21:52:02 +0200 | [diff] [blame] | 2 | i2c-i801.c - Part of lm_sensors, Linux kernel modules for hardware |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | monitoring |
| 4 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
| 5 | Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker |
| 6 | <mdsxyz123@yahoo.com> |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 7 | Copyright (C) 2007 Jean Delvare <khali@linux-fr.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | /* |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 25 | Supports the following Intel I/O Controller Hubs (ICH): |
| 26 | |
| 27 | I/O Block I2C |
| 28 | region SMBus Block proc. block |
| 29 | Chip name PCI ID size PEC buffer call read |
| 30 | ---------------------------------------------------------------------- |
| 31 | 82801AA (ICH) 0x2413 16 no no no no |
| 32 | 82801AB (ICH0) 0x2423 16 no no no no |
| 33 | 82801BA (ICH2) 0x2443 16 no no no no |
| 34 | 82801CA (ICH3) 0x2483 32 soft no no no |
| 35 | 82801DB (ICH4) 0x24c3 32 hard yes no no |
| 36 | 82801E (ICH5) 0x24d3 32 hard yes yes yes |
| 37 | 6300ESB 0x25a4 32 hard yes yes yes |
| 38 | 82801F (ICH6) 0x266a 32 hard yes yes yes |
| 39 | 6310ESB/6320ESB 0x269b 32 hard yes yes yes |
| 40 | 82801G (ICH7) 0x27da 32 hard yes yes yes |
| 41 | 82801H (ICH8) 0x283e 32 hard yes yes yes |
| 42 | 82801I (ICH9) 0x2930 32 hard yes yes yes |
Gaston, Jason D | d28dc71 | 2008-02-24 20:03:42 +0100 | [diff] [blame] | 43 | Tolapai 0x5032 32 hard yes yes yes |
| 44 | ICH10 0x3a30 32 hard yes yes yes |
| 45 | ICH10 0x3a60 32 hard yes yes yes |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 46 | |
| 47 | Features supported by this driver: |
| 48 | Software PEC no |
| 49 | Hardware PEC yes |
| 50 | Block buffer yes |
| 51 | Block process call transaction no |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 52 | I2C block read transaction yes (doesn't use the block buffer) |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 53 | |
| 54 | See the file Documentation/i2c/busses/i2c-i801 for details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | */ |
| 56 | |
| 57 | /* Note: we assume there can only be one I801, with one SMBus interface */ |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #include <linux/module.h> |
| 60 | #include <linux/pci.h> |
| 61 | #include <linux/kernel.h> |
| 62 | #include <linux/stddef.h> |
| 63 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <linux/ioport.h> |
| 65 | #include <linux/init.h> |
| 66 | #include <linux/i2c.h> |
| 67 | #include <asm/io.h> |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | /* I801 SMBus address offsets */ |
| 70 | #define SMBHSTSTS (0 + i801_smba) |
| 71 | #define SMBHSTCNT (2 + i801_smba) |
| 72 | #define SMBHSTCMD (3 + i801_smba) |
| 73 | #define SMBHSTADD (4 + i801_smba) |
| 74 | #define SMBHSTDAT0 (5 + i801_smba) |
| 75 | #define SMBHSTDAT1 (6 + i801_smba) |
| 76 | #define SMBBLKDAT (7 + i801_smba) |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 77 | #define SMBPEC (8 + i801_smba) /* ICH3 and later */ |
| 78 | #define SMBAUXSTS (12 + i801_smba) /* ICH4 and later */ |
| 79 | #define SMBAUXCTL (13 + i801_smba) /* ICH4 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | /* PCI Address Constants */ |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 82 | #define SMBBAR 4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #define SMBHSTCFG 0x040 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | /* Host configuration bits for SMBHSTCFG */ |
| 86 | #define SMBHSTCFG_HST_EN 1 |
| 87 | #define SMBHSTCFG_SMB_SMI_EN 2 |
| 88 | #define SMBHSTCFG_I2C_EN 4 |
| 89 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 90 | /* Auxillary control register bits, ICH4+ only */ |
| 91 | #define SMBAUXCTL_CRC 1 |
| 92 | #define SMBAUXCTL_E32B 2 |
| 93 | |
| 94 | /* kill bit for SMBHSTCNT */ |
| 95 | #define SMBHSTCNT_KILL 2 |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | /* Other settings */ |
| 98 | #define MAX_TIMEOUT 100 |
| 99 | #define ENABLE_INT9 0 /* set to 0x01 to enable - untested */ |
| 100 | |
| 101 | /* I801 command constants */ |
| 102 | #define I801_QUICK 0x00 |
| 103 | #define I801_BYTE 0x04 |
| 104 | #define I801_BYTE_DATA 0x08 |
| 105 | #define I801_WORD_DATA 0x0C |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 106 | #define I801_PROC_CALL 0x10 /* unimplemented */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | #define I801_BLOCK_DATA 0x14 |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 108 | #define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #define I801_BLOCK_LAST 0x34 |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 110 | #define I801_I2C_BLOCK_LAST 0x38 /* ICH5 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #define I801_START 0x40 |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 112 | #define I801_PEC_EN 0x80 /* ICH3 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 114 | /* I801 Hosts Status register bits */ |
| 115 | #define SMBHSTSTS_BYTE_DONE 0x80 |
| 116 | #define SMBHSTSTS_INUSE_STS 0x40 |
| 117 | #define SMBHSTSTS_SMBALERT_STS 0x20 |
| 118 | #define SMBHSTSTS_FAILED 0x10 |
| 119 | #define SMBHSTSTS_BUS_ERR 0x08 |
| 120 | #define SMBHSTSTS_DEV_ERR 0x04 |
| 121 | #define SMBHSTSTS_INTR 0x02 |
| 122 | #define SMBHSTSTS_HOST_BUSY 0x01 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 124 | static unsigned long i801_smba; |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 125 | static unsigned char i801_original_hstcfg; |
Jean Delvare | d6072f8 | 2005-09-25 16:37:04 +0200 | [diff] [blame] | 126 | static struct pci_driver i801_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | static struct pci_dev *I801_dev; |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 128 | |
| 129 | #define FEATURE_SMBUS_PEC (1 << 0) |
| 130 | #define FEATURE_BLOCK_BUFFER (1 << 1) |
| 131 | #define FEATURE_BLOCK_PROC (1 << 2) |
| 132 | #define FEATURE_I2C_BLOCK_READ (1 << 3) |
| 133 | static unsigned int i801_features; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 135 | static int i801_transaction(int xact) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
| 137 | int temp; |
| 138 | int result = 0; |
| 139 | int timeout = 0; |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /* Make sure the SMBus host is ready to start transmitting */ |
| 142 | /* 0x1f = Failed, Bus_Err, Dev_Err, Intr, Host_Busy */ |
| 143 | if ((temp = (0x1f & inb_p(SMBHSTSTS))) != 0x00) { |
Jean Delvare | 541e6a0 | 2005-06-23 22:18:08 +0200 | [diff] [blame] | 144 | dev_dbg(&I801_dev->dev, "SMBus busy (%02x). Resetting...\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | temp); |
| 146 | outb_p(temp, SMBHSTSTS); |
| 147 | if ((temp = (0x1f & inb_p(SMBHSTSTS))) != 0x00) { |
| 148 | dev_dbg(&I801_dev->dev, "Failed! (%02x)\n", temp); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 149 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } else { |
Jean Delvare | fcdd96e | 2007-02-13 22:08:59 +0100 | [diff] [blame] | 151 | dev_dbg(&I801_dev->dev, "Successful!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
| 153 | } |
| 154 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 155 | /* the current contents of SMBHSTCNT can be overwritten, since PEC, |
| 156 | * INTREN, SMBSCMD are passed in xact */ |
| 157 | outb_p(xact | I801_START, SMBHSTCNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | /* We will always wait for a fraction of a second! */ |
| 160 | do { |
| 161 | msleep(1); |
| 162 | temp = inb_p(SMBHSTSTS); |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 163 | } while ((temp & SMBHSTSTS_HOST_BUSY) && (timeout++ < MAX_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | /* If the SMBus is still busy, we give up */ |
| 166 | if (timeout >= MAX_TIMEOUT) { |
| 167 | dev_dbg(&I801_dev->dev, "SMBus Timeout!\n"); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 168 | result = -ETIMEDOUT; |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 169 | /* try to stop the current command */ |
| 170 | dev_dbg(&I801_dev->dev, "Terminating the current operation\n"); |
| 171 | outb_p(inb_p(SMBHSTCNT) | SMBHSTCNT_KILL, SMBHSTCNT); |
| 172 | msleep(1); |
| 173 | outb_p(inb_p(SMBHSTCNT) & (~SMBHSTCNT_KILL), SMBHSTCNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 176 | if (temp & SMBHSTSTS_FAILED) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 177 | result = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | dev_dbg(&I801_dev->dev, "Error: Failed bus transaction\n"); |
| 179 | } |
| 180 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 181 | if (temp & SMBHSTSTS_BUS_ERR) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 182 | result = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | dev_err(&I801_dev->dev, "Bus collision! SMBus may be locked " |
| 184 | "until next hard reset. (sorry!)\n"); |
| 185 | /* Clock stops and slave is stuck in mid-transmission */ |
| 186 | } |
| 187 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 188 | if (temp & SMBHSTSTS_DEV_ERR) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 189 | result = -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | dev_dbg(&I801_dev->dev, "Error: no response!\n"); |
| 191 | } |
| 192 | |
| 193 | if ((inb_p(SMBHSTSTS) & 0x1f) != 0x00) |
| 194 | outb_p(inb(SMBHSTSTS), SMBHSTSTS); |
| 195 | |
| 196 | if ((temp = (0x1f & inb_p(SMBHSTSTS))) != 0x00) { |
Jean Delvare | 368609c | 2005-07-29 12:15:07 -0700 | [diff] [blame] | 197 | dev_dbg(&I801_dev->dev, "Failed reset at end of transaction " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | "(%02x)\n", temp); |
| 199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | return result; |
| 201 | } |
| 202 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 203 | /* wait for INTR bit as advised by Intel */ |
| 204 | static void i801_wait_hwpec(void) |
| 205 | { |
| 206 | int timeout = 0; |
| 207 | int temp; |
| 208 | |
| 209 | do { |
| 210 | msleep(1); |
| 211 | temp = inb_p(SMBHSTSTS); |
| 212 | } while ((!(temp & SMBHSTSTS_INTR)) |
| 213 | && (timeout++ < MAX_TIMEOUT)); |
| 214 | |
| 215 | if (timeout >= MAX_TIMEOUT) { |
| 216 | dev_dbg(&I801_dev->dev, "PEC Timeout!\n"); |
| 217 | } |
| 218 | outb_p(temp, SMBHSTSTS); |
| 219 | } |
| 220 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 221 | static int i801_block_transaction_by_block(union i2c_smbus_data *data, |
| 222 | char read_write, int hwpec) |
| 223 | { |
| 224 | int i, len; |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 225 | int status; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 226 | |
| 227 | inb_p(SMBHSTCNT); /* reset the data buffer index */ |
| 228 | |
| 229 | /* Use 32-byte buffer to process this transaction */ |
| 230 | if (read_write == I2C_SMBUS_WRITE) { |
| 231 | len = data->block[0]; |
| 232 | outb_p(len, SMBHSTDAT0); |
| 233 | for (i = 0; i < len; i++) |
| 234 | outb_p(data->block[i+1], SMBBLKDAT); |
| 235 | } |
| 236 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 237 | status = i801_transaction(I801_BLOCK_DATA | ENABLE_INT9 | |
| 238 | I801_PEC_EN * hwpec); |
| 239 | if (status) |
| 240 | return status; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 241 | |
| 242 | if (read_write == I2C_SMBUS_READ) { |
| 243 | len = inb_p(SMBHSTDAT0); |
| 244 | if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 245 | return -EPROTO; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 246 | |
| 247 | data->block[0] = len; |
| 248 | for (i = 0; i < len; i++) |
| 249 | data->block[i + 1] = inb_p(SMBBLKDAT); |
| 250 | } |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data, |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 255 | char read_write, int command, |
| 256 | int hwpec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
| 258 | int i, len; |
| 259 | int smbcmd; |
| 260 | int temp; |
| 261 | int result = 0; |
| 262 | int timeout; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 263 | unsigned char errmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 265 | len = data->block[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | if (read_write == I2C_SMBUS_WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | outb_p(len, SMBHSTDAT0); |
| 269 | outb_p(data->block[1], SMBBLKDAT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | for (i = 1; i <= len; i++) { |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 273 | if (i == len && read_write == I2C_SMBUS_READ) { |
| 274 | if (command == I2C_SMBUS_I2C_BLOCK_DATA) |
| 275 | smbcmd = I801_I2C_BLOCK_LAST; |
| 276 | else |
| 277 | smbcmd = I801_BLOCK_LAST; |
| 278 | } else { |
| 279 | if (command == I2C_SMBUS_I2C_BLOCK_DATA |
| 280 | && read_write == I2C_SMBUS_READ) |
| 281 | smbcmd = I801_I2C_BLOCK_DATA; |
| 282 | else |
| 283 | smbcmd = I801_BLOCK_DATA; |
| 284 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | outb_p(smbcmd | ENABLE_INT9, SMBHSTCNT); |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /* Make sure the SMBus host is ready to start transmitting */ |
| 288 | temp = inb_p(SMBHSTSTS); |
| 289 | if (i == 1) { |
Jean Delvare | 002cf63 | 2007-08-14 18:37:13 +0200 | [diff] [blame] | 290 | /* Erroneous conditions before transaction: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | * Byte_Done, Failed, Bus_Err, Dev_Err, Intr, Host_Busy */ |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 292 | errmask = 0x9f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } else { |
Jean Delvare | 002cf63 | 2007-08-14 18:37:13 +0200 | [diff] [blame] | 294 | /* Erroneous conditions during transaction: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | * Failed, Bus_Err, Dev_Err, Intr */ |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 296 | errmask = 0x1e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | if (temp & errmask) { |
| 299 | dev_dbg(&I801_dev->dev, "SMBus busy (%02x). " |
Jean Delvare | 541e6a0 | 2005-06-23 22:18:08 +0200 | [diff] [blame] | 300 | "Resetting...\n", temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | outb_p(temp, SMBHSTSTS); |
| 302 | if (((temp = inb_p(SMBHSTSTS)) & errmask) != 0x00) { |
| 303 | dev_err(&I801_dev->dev, |
| 304 | "Reset failed! (%02x)\n", temp); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 305 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 307 | if (i != 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* if die in middle of block transaction, fail */ |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 309 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | if (i == 1) |
| 313 | outb_p(inb(SMBHSTCNT) | I801_START, SMBHSTCNT); |
| 314 | |
| 315 | /* We will always wait for a fraction of a second! */ |
| 316 | timeout = 0; |
| 317 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | msleep(1); |
Jean Delvare | 397e2f6 | 2006-06-12 21:49:36 +0200 | [diff] [blame] | 319 | temp = inb_p(SMBHSTSTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 321 | while ((!(temp & SMBHSTSTS_BYTE_DONE)) |
| 322 | && (timeout++ < MAX_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | /* If the SMBus is still busy, we give up */ |
| 325 | if (timeout >= MAX_TIMEOUT) { |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 326 | /* try to stop the current command */ |
| 327 | dev_dbg(&I801_dev->dev, "Terminating the current " |
| 328 | "operation\n"); |
| 329 | outb_p(inb_p(SMBHSTCNT) | SMBHSTCNT_KILL, SMBHSTCNT); |
| 330 | msleep(1); |
| 331 | outb_p(inb_p(SMBHSTCNT) & (~SMBHSTCNT_KILL), |
| 332 | SMBHSTCNT); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 333 | result = -ETIMEDOUT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | dev_dbg(&I801_dev->dev, "SMBus Timeout!\n"); |
| 335 | } |
| 336 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 337 | if (temp & SMBHSTSTS_FAILED) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 338 | result = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | dev_dbg(&I801_dev->dev, |
| 340 | "Error: Failed bus transaction\n"); |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 341 | } else if (temp & SMBHSTSTS_BUS_ERR) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 342 | result = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | dev_err(&I801_dev->dev, "Bus collision!\n"); |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 344 | } else if (temp & SMBHSTSTS_DEV_ERR) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 345 | result = -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | dev_dbg(&I801_dev->dev, "Error: no response!\n"); |
| 347 | } |
| 348 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 349 | if (i == 1 && read_write == I2C_SMBUS_READ |
| 350 | && command != I2C_SMBUS_I2C_BLOCK_DATA) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | len = inb_p(SMBHSTDAT0); |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 352 | if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 353 | return -EPROTO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | data->block[0] = len; |
| 355 | } |
| 356 | |
| 357 | /* Retrieve/store value in SMBBLKDAT */ |
| 358 | if (read_write == I2C_SMBUS_READ) |
| 359 | data->block[i] = inb_p(SMBBLKDAT); |
| 360 | if (read_write == I2C_SMBUS_WRITE && i+1 <= len) |
| 361 | outb_p(data->block[i+1], SMBBLKDAT); |
| 362 | if ((temp & 0x9e) != 0x00) |
| 363 | outb_p(temp, SMBHSTSTS); /* signals SMBBLKDAT ready */ |
| 364 | |
| 365 | if ((temp = (0x1e & inb_p(SMBHSTSTS))) != 0x00) { |
| 366 | dev_dbg(&I801_dev->dev, |
| 367 | "Bad status (%02x) at end of transaction\n", |
| 368 | temp); |
| 369 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
| 371 | if (result < 0) |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 372 | return result; |
| 373 | } |
| 374 | return result; |
| 375 | } |
| 376 | |
| 377 | static int i801_set_block_buffer_mode(void) |
| 378 | { |
| 379 | outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_E32B, SMBAUXCTL); |
| 380 | if ((inb_p(SMBAUXCTL) & SMBAUXCTL_E32B) == 0) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 381 | return -EIO; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | /* Block transaction function */ |
| 386 | static int i801_block_transaction(union i2c_smbus_data *data, char read_write, |
| 387 | int command, int hwpec) |
| 388 | { |
| 389 | int result = 0; |
| 390 | unsigned char hostc; |
| 391 | |
| 392 | if (command == I2C_SMBUS_I2C_BLOCK_DATA) { |
| 393 | if (read_write == I2C_SMBUS_WRITE) { |
| 394 | /* set I2C_EN bit in configuration register */ |
| 395 | pci_read_config_byte(I801_dev, SMBHSTCFG, &hostc); |
| 396 | pci_write_config_byte(I801_dev, SMBHSTCFG, |
| 397 | hostc | SMBHSTCFG_I2C_EN); |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 398 | } else if (!(i801_features & FEATURE_I2C_BLOCK_READ)) { |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 399 | dev_err(&I801_dev->dev, |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 400 | "I2C block read is unsupported!\n"); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 401 | return -EOPNOTSUPP; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 402 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 405 | if (read_write == I2C_SMBUS_WRITE |
| 406 | || command == I2C_SMBUS_I2C_BLOCK_DATA) { |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 407 | if (data->block[0] < 1) |
| 408 | data->block[0] = 1; |
| 409 | if (data->block[0] > I2C_SMBUS_BLOCK_MAX) |
| 410 | data->block[0] = I2C_SMBUS_BLOCK_MAX; |
| 411 | } else { |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 412 | data->block[0] = 32; /* max for SMBus block reads */ |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 413 | } |
| 414 | |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 415 | if ((i801_features & FEATURE_BLOCK_BUFFER) |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 416 | && !(command == I2C_SMBUS_I2C_BLOCK_DATA |
| 417 | && read_write == I2C_SMBUS_READ) |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 418 | && i801_set_block_buffer_mode() == 0) |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 419 | result = i801_block_transaction_by_block(data, read_write, |
| 420 | hwpec); |
| 421 | else |
| 422 | result = i801_block_transaction_byte_by_byte(data, read_write, |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 423 | command, hwpec); |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 424 | |
| 425 | if (result == 0 && hwpec) |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 426 | i801_wait_hwpec(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 428 | if (command == I2C_SMBUS_I2C_BLOCK_DATA |
| 429 | && read_write == I2C_SMBUS_WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | /* restore saved configuration register value */ |
| 431 | pci_write_config_byte(I801_dev, SMBHSTCFG, hostc); |
| 432 | } |
| 433 | return result; |
| 434 | } |
| 435 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 436 | /* Return negative errno on error. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | static s32 i801_access(struct i2c_adapter * adap, u16 addr, |
| 438 | unsigned short flags, char read_write, u8 command, |
| 439 | int size, union i2c_smbus_data * data) |
| 440 | { |
Jean Delvare | e8aac4a | 2005-10-26 21:34:42 +0200 | [diff] [blame] | 441 | int hwpec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | int block = 0; |
| 443 | int ret, xact = 0; |
| 444 | |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 445 | hwpec = (i801_features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC) |
Jean Delvare | e8aac4a | 2005-10-26 21:34:42 +0200 | [diff] [blame] | 446 | && size != I2C_SMBUS_QUICK |
| 447 | && size != I2C_SMBUS_I2C_BLOCK_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
| 449 | switch (size) { |
| 450 | case I2C_SMBUS_QUICK: |
| 451 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 452 | SMBHSTADD); |
| 453 | xact = I801_QUICK; |
| 454 | break; |
| 455 | case I2C_SMBUS_BYTE: |
| 456 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 457 | SMBHSTADD); |
| 458 | if (read_write == I2C_SMBUS_WRITE) |
| 459 | outb_p(command, SMBHSTCMD); |
| 460 | xact = I801_BYTE; |
| 461 | break; |
| 462 | case I2C_SMBUS_BYTE_DATA: |
| 463 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 464 | SMBHSTADD); |
| 465 | outb_p(command, SMBHSTCMD); |
| 466 | if (read_write == I2C_SMBUS_WRITE) |
| 467 | outb_p(data->byte, SMBHSTDAT0); |
| 468 | xact = I801_BYTE_DATA; |
| 469 | break; |
| 470 | case I2C_SMBUS_WORD_DATA: |
| 471 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 472 | SMBHSTADD); |
| 473 | outb_p(command, SMBHSTCMD); |
| 474 | if (read_write == I2C_SMBUS_WRITE) { |
| 475 | outb_p(data->word & 0xff, SMBHSTDAT0); |
| 476 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
| 477 | } |
| 478 | xact = I801_WORD_DATA; |
| 479 | break; |
| 480 | case I2C_SMBUS_BLOCK_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 482 | SMBHSTADD); |
| 483 | outb_p(command, SMBHSTCMD); |
| 484 | block = 1; |
| 485 | break; |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 486 | case I2C_SMBUS_I2C_BLOCK_DATA: |
| 487 | /* NB: page 240 of ICH5 datasheet shows that the R/#W |
| 488 | * bit should be cleared here, even when reading */ |
| 489 | outb_p((addr & 0x7f) << 1, SMBHSTADD); |
| 490 | if (read_write == I2C_SMBUS_READ) { |
| 491 | /* NB: page 240 of ICH5 datasheet also shows |
| 492 | * that DATA1 is the cmd field when reading */ |
| 493 | outb_p(command, SMBHSTDAT1); |
| 494 | } else |
| 495 | outb_p(command, SMBHSTCMD); |
| 496 | block = 1; |
| 497 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | default: |
| 499 | dev_err(&I801_dev->dev, "Unsupported transaction %d\n", size); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 500 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 503 | if (hwpec) /* enable/disable hardware PEC */ |
| 504 | outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_CRC, SMBAUXCTL); |
| 505 | else |
| 506 | outb_p(inb_p(SMBAUXCTL) & (~SMBAUXCTL_CRC), SMBAUXCTL); |
Jean Delvare | e8aac4a | 2005-10-26 21:34:42 +0200 | [diff] [blame] | 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | if(block) |
Jean Delvare | 585b316 | 2005-10-26 21:31:15 +0200 | [diff] [blame] | 509 | ret = i801_block_transaction(data, read_write, size, hwpec); |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 510 | else |
| 511 | ret = i801_transaction(xact | ENABLE_INT9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Jean Delvare | c79cfba | 2006-04-20 02:43:18 -0700 | [diff] [blame] | 513 | /* Some BIOSes don't like it when PEC is enabled at reboot or resume |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 514 | time, so we forcibly disable it after every transaction. Turn off |
| 515 | E32B for the same reason. */ |
Jean Delvare | a0921b6 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 516 | if (hwpec || block) |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 517 | outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), |
| 518 | SMBAUXCTL); |
Jean Delvare | c79cfba | 2006-04-20 02:43:18 -0700 | [diff] [blame] | 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | if(block) |
| 521 | return ret; |
| 522 | if(ret) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 523 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK)) |
| 525 | return 0; |
| 526 | |
| 527 | switch (xact & 0x7f) { |
| 528 | case I801_BYTE: /* Result put in SMBHSTDAT0 */ |
| 529 | case I801_BYTE_DATA: |
| 530 | data->byte = inb_p(SMBHSTDAT0); |
| 531 | break; |
| 532 | case I801_WORD_DATA: |
| 533 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); |
| 534 | break; |
| 535 | } |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | |
| 540 | static u32 i801_func(struct i2c_adapter *adapter) |
| 541 | { |
| 542 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 543 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
| 544 | I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 545 | ((i801_features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) | |
| 546 | ((i801_features & FEATURE_I2C_BLOCK_READ) ? |
| 547 | I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | } |
| 549 | |
Jean Delvare | 8f9082c | 2006-09-03 22:39:46 +0200 | [diff] [blame] | 550 | static const struct i2c_algorithm smbus_algorithm = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | .smbus_xfer = i801_access, |
| 552 | .functionality = i801_func, |
| 553 | }; |
| 554 | |
| 555 | static struct i2c_adapter i801_adapter = { |
| 556 | .owner = THIS_MODULE, |
Stephen Hemminger | 9ace555 | 2007-02-13 22:09:01 +0100 | [diff] [blame] | 557 | .id = I2C_HW_SMBUS_I801, |
Jean Delvare | 3401b2f | 2008-07-14 22:38:29 +0200 | [diff] [blame] | 558 | .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | .algo = &smbus_algorithm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | }; |
| 561 | |
| 562 | static struct pci_device_id i801_ids[] = { |
| 563 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) }, |
| 564 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) }, |
| 565 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) }, |
| 566 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) }, |
| 567 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) }, |
| 568 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) }, |
| 569 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) }, |
| 570 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) }, |
| 571 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) }, |
Jason Gaston | b0a70b5 | 2005-04-16 15:24:45 -0700 | [diff] [blame] | 572 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) }, |
Jason Gaston | 8254fc4 | 2006-01-09 10:58:08 -0800 | [diff] [blame] | 573 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) }, |
Jason Gaston | adbc2a1 | 2006-11-22 15:19:12 -0800 | [diff] [blame] | 574 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) }, |
Jason Gaston | e07bc67 | 2007-10-13 23:56:31 +0200 | [diff] [blame] | 575 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TOLAPAI_1) }, |
Gaston, Jason D | d28dc71 | 2008-02-24 20:03:42 +0100 | [diff] [blame] | 576 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_4) }, |
| 577 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_5) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | { 0, } |
| 579 | }; |
| 580 | |
| 581 | MODULE_DEVICE_TABLE (pci, i801_ids); |
| 582 | |
| 583 | static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| 584 | { |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 585 | unsigned char temp; |
Jean Delvare | 455f332 | 2006-06-12 21:52:02 +0200 | [diff] [blame] | 586 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 588 | I801_dev = dev; |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 589 | i801_features = 0; |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 590 | switch (dev->device) { |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 591 | case PCI_DEVICE_ID_INTEL_82801EB_3: |
| 592 | case PCI_DEVICE_ID_INTEL_ESB_4: |
| 593 | case PCI_DEVICE_ID_INTEL_ICH6_16: |
| 594 | case PCI_DEVICE_ID_INTEL_ICH7_17: |
| 595 | case PCI_DEVICE_ID_INTEL_ESB2_17: |
| 596 | case PCI_DEVICE_ID_INTEL_ICH8_5: |
| 597 | case PCI_DEVICE_ID_INTEL_ICH9_6: |
Gaston, Jason D | d28dc71 | 2008-02-24 20:03:42 +0100 | [diff] [blame] | 598 | case PCI_DEVICE_ID_INTEL_TOLAPAI_1: |
| 599 | case PCI_DEVICE_ID_INTEL_ICH10_4: |
| 600 | case PCI_DEVICE_ID_INTEL_ICH10_5: |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 601 | i801_features |= FEATURE_I2C_BLOCK_READ; |
| 602 | /* fall through */ |
| 603 | case PCI_DEVICE_ID_INTEL_82801DB_3: |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 604 | i801_features |= FEATURE_SMBUS_PEC; |
| 605 | i801_features |= FEATURE_BLOCK_BUFFER; |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 606 | break; |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 607 | } |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 608 | |
| 609 | err = pci_enable_device(dev); |
| 610 | if (err) { |
| 611 | dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n", |
| 612 | err); |
| 613 | goto exit; |
| 614 | } |
| 615 | |
| 616 | /* Determine the address of the SMBus area */ |
| 617 | i801_smba = pci_resource_start(dev, SMBBAR); |
| 618 | if (!i801_smba) { |
| 619 | dev_err(&dev->dev, "SMBus base address uninitialized, " |
| 620 | "upgrade BIOS\n"); |
| 621 | err = -ENODEV; |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 622 | goto exit; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 623 | } |
| 624 | |
| 625 | err = pci_request_region(dev, SMBBAR, i801_driver.name); |
| 626 | if (err) { |
| 627 | dev_err(&dev->dev, "Failed to request SMBus region " |
Andrew Morton | 598736c | 2006-06-30 01:56:20 -0700 | [diff] [blame] | 628 | "0x%lx-0x%Lx\n", i801_smba, |
| 629 | (unsigned long long)pci_resource_end(dev, SMBBAR)); |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 630 | goto exit; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | pci_read_config_byte(I801_dev, SMBHSTCFG, &temp); |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 634 | i801_original_hstcfg = temp; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 635 | temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */ |
| 636 | if (!(temp & SMBHSTCFG_HST_EN)) { |
| 637 | dev_info(&dev->dev, "Enabling SMBus device\n"); |
| 638 | temp |= SMBHSTCFG_HST_EN; |
| 639 | } |
| 640 | pci_write_config_byte(I801_dev, SMBHSTCFG, temp); |
| 641 | |
| 642 | if (temp & SMBHSTCFG_SMB_SMI_EN) |
| 643 | dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n"); |
| 644 | else |
| 645 | dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
Jean Delvare | a0921b6 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 647 | /* Clear special mode bits */ |
| 648 | if (i801_features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER)) |
| 649 | outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), |
| 650 | SMBAUXCTL); |
| 651 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 652 | /* set up the sysfs linkage to our parent device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | i801_adapter.dev.parent = &dev->dev; |
| 654 | |
David Brownell | 2096b95 | 2007-05-01 23:26:28 +0200 | [diff] [blame] | 655 | snprintf(i801_adapter.name, sizeof(i801_adapter.name), |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 656 | "SMBus I801 adapter at %04lx", i801_smba); |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 657 | err = i2c_add_adapter(&i801_adapter); |
| 658 | if (err) { |
| 659 | dev_err(&dev->dev, "Failed to add SMBus adapter\n"); |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 660 | goto exit_release; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 661 | } |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 662 | return 0; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 663 | |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 664 | exit_release: |
| 665 | pci_release_region(dev, SMBBAR); |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 666 | exit: |
| 667 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | static void __devexit i801_remove(struct pci_dev *dev) |
| 671 | { |
| 672 | i2c_del_adapter(&i801_adapter); |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 673 | pci_write_config_byte(I801_dev, SMBHSTCFG, i801_original_hstcfg); |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 674 | pci_release_region(dev, SMBBAR); |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 675 | /* |
| 676 | * do not call pci_disable_device(dev) since it can cause hard hangs on |
| 677 | * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010) |
| 678 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | } |
| 680 | |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 681 | #ifdef CONFIG_PM |
| 682 | static int i801_suspend(struct pci_dev *dev, pm_message_t mesg) |
| 683 | { |
| 684 | pci_save_state(dev); |
| 685 | pci_write_config_byte(dev, SMBHSTCFG, i801_original_hstcfg); |
| 686 | pci_set_power_state(dev, pci_choose_state(dev, mesg)); |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | static int i801_resume(struct pci_dev *dev) |
| 691 | { |
| 692 | pci_set_power_state(dev, PCI_D0); |
| 693 | pci_restore_state(dev); |
| 694 | return pci_enable_device(dev); |
| 695 | } |
| 696 | #else |
| 697 | #define i801_suspend NULL |
| 698 | #define i801_resume NULL |
| 699 | #endif |
| 700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | static struct pci_driver i801_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | .name = "i801_smbus", |
| 703 | .id_table = i801_ids, |
| 704 | .probe = i801_probe, |
| 705 | .remove = __devexit_p(i801_remove), |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 706 | .suspend = i801_suspend, |
| 707 | .resume = i801_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | }; |
| 709 | |
| 710 | static int __init i2c_i801_init(void) |
| 711 | { |
| 712 | return pci_register_driver(&i801_driver); |
| 713 | } |
| 714 | |
| 715 | static void __exit i2c_i801_exit(void) |
| 716 | { |
| 717 | pci_unregister_driver(&i801_driver); |
| 718 | } |
| 719 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 720 | MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>, " |
| 721 | "Jean Delvare <khali@linux-fr.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | MODULE_DESCRIPTION("I801 SMBus driver"); |
| 723 | MODULE_LICENSE("GPL"); |
| 724 | |
| 725 | module_init(i2c_i801_init); |
| 726 | module_exit(i2c_i801_exit); |