Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
| 3 | Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker |
| 4 | <mdsxyz123@yahoo.com> |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 5 | Copyright (C) 2007, 2008 Jean Delvare <khali@linux-fr.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | /* |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 23 | Supports the following Intel I/O Controller Hubs (ICH): |
| 24 | |
| 25 | I/O Block I2C |
| 26 | region SMBus Block proc. block |
| 27 | Chip name PCI ID size PEC buffer call read |
| 28 | ---------------------------------------------------------------------- |
| 29 | 82801AA (ICH) 0x2413 16 no no no no |
| 30 | 82801AB (ICH0) 0x2423 16 no no no no |
| 31 | 82801BA (ICH2) 0x2443 16 no no no no |
| 32 | 82801CA (ICH3) 0x2483 32 soft no no no |
| 33 | 82801DB (ICH4) 0x24c3 32 hard yes no no |
| 34 | 82801E (ICH5) 0x24d3 32 hard yes yes yes |
| 35 | 6300ESB 0x25a4 32 hard yes yes yes |
| 36 | 82801F (ICH6) 0x266a 32 hard yes yes yes |
| 37 | 6310ESB/6320ESB 0x269b 32 hard yes yes yes |
| 38 | 82801G (ICH7) 0x27da 32 hard yes yes yes |
| 39 | 82801H (ICH8) 0x283e 32 hard yes yes yes |
| 40 | 82801I (ICH9) 0x2930 32 hard yes yes yes |
Seth Heasley | cb04e95 | 2010-10-04 13:27:14 -0700 | [diff] [blame] | 41 | EP80579 (Tolapai) 0x5032 32 hard yes yes yes |
Gaston, Jason D | d28dc71 | 2008-02-24 20:03:42 +0100 | [diff] [blame] | 42 | ICH10 0x3a30 32 hard yes yes yes |
| 43 | ICH10 0x3a60 32 hard yes yes yes |
Seth Heasley | cb04e95 | 2010-10-04 13:27:14 -0700 | [diff] [blame] | 44 | 5/3400 Series (PCH) 0x3b30 32 hard yes yes yes |
Seth Heasley | 3937643 | 2010-03-02 12:23:39 +0100 | [diff] [blame] | 45 | Cougar Point (PCH) 0x1c22 32 hard yes yes yes |
Seth Heasley | e30d985 | 2010-10-31 21:06:59 +0100 | [diff] [blame^] | 46 | Patsburg (PCH) 0x1d22 32 hard yes yes yes |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 47 | |
| 48 | Features supported by this driver: |
| 49 | Software PEC no |
| 50 | Hardware PEC yes |
| 51 | Block buffer yes |
| 52 | Block process call transaction no |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 53 | I2C block read transaction yes (doesn't use the block buffer) |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 54 | |
| 55 | See the file Documentation/i2c/busses/i2c-i801 for details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | */ |
| 57 | |
| 58 | /* Note: we assume there can only be one I801, with one SMBus interface */ |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #include <linux/module.h> |
| 61 | #include <linux/pci.h> |
| 62 | #include <linux/kernel.h> |
| 63 | #include <linux/stddef.h> |
| 64 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #include <linux/ioport.h> |
| 66 | #include <linux/init.h> |
| 67 | #include <linux/i2c.h> |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 68 | #include <linux/acpi.h> |
Jean Delvare | 1561bfe | 2009-01-07 14:29:17 +0100 | [diff] [blame] | 69 | #include <linux/io.h> |
Hans de Goede | fa5bfab | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 70 | #include <linux/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | /* I801 SMBus address offsets */ |
| 73 | #define SMBHSTSTS (0 + i801_smba) |
| 74 | #define SMBHSTCNT (2 + i801_smba) |
| 75 | #define SMBHSTCMD (3 + i801_smba) |
| 76 | #define SMBHSTADD (4 + i801_smba) |
| 77 | #define SMBHSTDAT0 (5 + i801_smba) |
| 78 | #define SMBHSTDAT1 (6 + i801_smba) |
| 79 | #define SMBBLKDAT (7 + i801_smba) |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 80 | #define SMBPEC (8 + i801_smba) /* ICH3 and later */ |
| 81 | #define SMBAUXSTS (12 + i801_smba) /* ICH4 and later */ |
| 82 | #define SMBAUXCTL (13 + i801_smba) /* ICH4 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | /* PCI Address Constants */ |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 85 | #define SMBBAR 4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | #define SMBHSTCFG 0x040 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* Host configuration bits for SMBHSTCFG */ |
| 89 | #define SMBHSTCFG_HST_EN 1 |
| 90 | #define SMBHSTCFG_SMB_SMI_EN 2 |
| 91 | #define SMBHSTCFG_I2C_EN 4 |
| 92 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 93 | /* Auxillary control register bits, ICH4+ only */ |
| 94 | #define SMBAUXCTL_CRC 1 |
| 95 | #define SMBAUXCTL_E32B 2 |
| 96 | |
| 97 | /* kill bit for SMBHSTCNT */ |
| 98 | #define SMBHSTCNT_KILL 2 |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | /* Other settings */ |
| 101 | #define MAX_TIMEOUT 100 |
| 102 | #define ENABLE_INT9 0 /* set to 0x01 to enable - untested */ |
| 103 | |
| 104 | /* I801 command constants */ |
| 105 | #define I801_QUICK 0x00 |
| 106 | #define I801_BYTE 0x04 |
| 107 | #define I801_BYTE_DATA 0x08 |
| 108 | #define I801_WORD_DATA 0x0C |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 109 | #define I801_PROC_CALL 0x10 /* unimplemented */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | #define I801_BLOCK_DATA 0x14 |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 111 | #define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #define I801_BLOCK_LAST 0x34 |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 113 | #define I801_I2C_BLOCK_LAST 0x38 /* ICH5 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #define I801_START 0x40 |
Jean Delvare | ae7b049 | 2008-01-27 18:14:49 +0100 | [diff] [blame] | 115 | #define I801_PEC_EN 0x80 /* ICH3 and later */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 117 | /* I801 Hosts Status register bits */ |
| 118 | #define SMBHSTSTS_BYTE_DONE 0x80 |
| 119 | #define SMBHSTSTS_INUSE_STS 0x40 |
| 120 | #define SMBHSTSTS_SMBALERT_STS 0x20 |
| 121 | #define SMBHSTSTS_FAILED 0x10 |
| 122 | #define SMBHSTSTS_BUS_ERR 0x08 |
| 123 | #define SMBHSTSTS_DEV_ERR 0x04 |
| 124 | #define SMBHSTSTS_INTR 0x02 |
| 125 | #define SMBHSTSTS_HOST_BUSY 0x01 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 127 | #define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_FAILED | \ |
| 128 | SMBHSTSTS_BUS_ERR | SMBHSTSTS_DEV_ERR | \ |
| 129 | SMBHSTSTS_INTR) |
| 130 | |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 131 | static unsigned long i801_smba; |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 132 | static unsigned char i801_original_hstcfg; |
Jean Delvare | d6072f8 | 2005-09-25 16:37:04 +0200 | [diff] [blame] | 133 | static struct pci_driver i801_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | static struct pci_dev *I801_dev; |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 135 | |
| 136 | #define FEATURE_SMBUS_PEC (1 << 0) |
| 137 | #define FEATURE_BLOCK_BUFFER (1 << 1) |
| 138 | #define FEATURE_BLOCK_PROC (1 << 2) |
| 139 | #define FEATURE_I2C_BLOCK_READ (1 << 3) |
| 140 | static unsigned int i801_features; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
Jean Delvare | adff687 | 2010-05-21 18:40:54 +0200 | [diff] [blame] | 142 | static const char *i801_feature_names[] = { |
| 143 | "SMBus PEC", |
| 144 | "Block buffer", |
| 145 | "Block process call", |
| 146 | "I2C block read", |
| 147 | }; |
| 148 | |
| 149 | static unsigned int disable_features; |
| 150 | module_param(disable_features, uint, S_IRUGO | S_IWUSR); |
| 151 | MODULE_PARM_DESC(disable_features, "Disable selected driver features"); |
| 152 | |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 153 | /* Make sure the SMBus host is ready to start transmitting. |
| 154 | Return 0 if it is, -EBUSY if it is not. */ |
| 155 | static int i801_check_pre(void) |
| 156 | { |
| 157 | int status; |
| 158 | |
| 159 | status = inb_p(SMBHSTSTS); |
| 160 | if (status & SMBHSTSTS_HOST_BUSY) { |
| 161 | dev_err(&I801_dev->dev, "SMBus is busy, can't use it!\n"); |
| 162 | return -EBUSY; |
| 163 | } |
| 164 | |
| 165 | status &= STATUS_FLAGS; |
| 166 | if (status) { |
| 167 | dev_dbg(&I801_dev->dev, "Clearing status flags (%02x)\n", |
| 168 | status); |
| 169 | outb_p(status, SMBHSTSTS); |
| 170 | status = inb_p(SMBHSTSTS) & STATUS_FLAGS; |
| 171 | if (status) { |
| 172 | dev_err(&I801_dev->dev, |
| 173 | "Failed clearing status flags (%02x)\n", |
| 174 | status); |
| 175 | return -EBUSY; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | /* Convert the status register to an error code, and clear it. */ |
| 183 | static int i801_check_post(int status, int timeout) |
| 184 | { |
| 185 | int result = 0; |
| 186 | |
| 187 | /* If the SMBus is still busy, we give up */ |
| 188 | if (timeout) { |
| 189 | dev_err(&I801_dev->dev, "Transaction timeout\n"); |
| 190 | /* try to stop the current command */ |
| 191 | dev_dbg(&I801_dev->dev, "Terminating the current operation\n"); |
| 192 | outb_p(inb_p(SMBHSTCNT) | SMBHSTCNT_KILL, SMBHSTCNT); |
| 193 | msleep(1); |
| 194 | outb_p(inb_p(SMBHSTCNT) & (~SMBHSTCNT_KILL), SMBHSTCNT); |
| 195 | |
| 196 | /* Check if it worked */ |
| 197 | status = inb_p(SMBHSTSTS); |
| 198 | if ((status & SMBHSTSTS_HOST_BUSY) || |
| 199 | !(status & SMBHSTSTS_FAILED)) |
| 200 | dev_err(&I801_dev->dev, |
| 201 | "Failed terminating the transaction\n"); |
| 202 | outb_p(STATUS_FLAGS, SMBHSTSTS); |
| 203 | return -ETIMEDOUT; |
| 204 | } |
| 205 | |
| 206 | if (status & SMBHSTSTS_FAILED) { |
| 207 | result = -EIO; |
| 208 | dev_err(&I801_dev->dev, "Transaction failed\n"); |
| 209 | } |
| 210 | if (status & SMBHSTSTS_DEV_ERR) { |
| 211 | result = -ENXIO; |
| 212 | dev_dbg(&I801_dev->dev, "No response\n"); |
| 213 | } |
| 214 | if (status & SMBHSTSTS_BUS_ERR) { |
| 215 | result = -EAGAIN; |
| 216 | dev_dbg(&I801_dev->dev, "Lost arbitration\n"); |
| 217 | } |
| 218 | |
| 219 | if (result) { |
| 220 | /* Clear error flags */ |
| 221 | outb_p(status & STATUS_FLAGS, SMBHSTSTS); |
| 222 | status = inb_p(SMBHSTSTS) & STATUS_FLAGS; |
| 223 | if (status) { |
| 224 | dev_warn(&I801_dev->dev, "Failed clearing status " |
| 225 | "flags at end of transaction (%02x)\n", |
| 226 | status); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | return result; |
| 231 | } |
| 232 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 233 | static int i801_transaction(int xact) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 235 | int status; |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 236 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | int timeout = 0; |
| 238 | |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 239 | result = i801_check_pre(); |
| 240 | if (result < 0) |
| 241 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 243 | /* the current contents of SMBHSTCNT can be overwritten, since PEC, |
| 244 | * INTREN, SMBSCMD are passed in xact */ |
| 245 | outb_p(xact | I801_START, SMBHSTCNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | /* We will always wait for a fraction of a second! */ |
| 248 | do { |
| 249 | msleep(1); |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 250 | status = inb_p(SMBHSTSTS); |
| 251 | } while ((status & SMBHSTSTS_HOST_BUSY) && (timeout++ < MAX_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Roel Kluin | 4ccc28f | 2009-05-05 08:39:24 +0200 | [diff] [blame] | 253 | result = i801_check_post(status, timeout > MAX_TIMEOUT); |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 254 | if (result < 0) |
| 255 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 257 | outb_p(SMBHSTSTS_INTR, SMBHSTSTS); |
| 258 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | } |
| 260 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 261 | /* wait for INTR bit as advised by Intel */ |
| 262 | static void i801_wait_hwpec(void) |
| 263 | { |
| 264 | int timeout = 0; |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 265 | int status; |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 266 | |
| 267 | do { |
| 268 | msleep(1); |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 269 | status = inb_p(SMBHSTSTS); |
| 270 | } while ((!(status & SMBHSTSTS_INTR)) |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 271 | && (timeout++ < MAX_TIMEOUT)); |
| 272 | |
Roel Kluin | 4ccc28f | 2009-05-05 08:39:24 +0200 | [diff] [blame] | 273 | if (timeout > MAX_TIMEOUT) |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 274 | dev_dbg(&I801_dev->dev, "PEC Timeout!\n"); |
Roel Kluin | 4ccc28f | 2009-05-05 08:39:24 +0200 | [diff] [blame] | 275 | |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 276 | outb_p(status, SMBHSTSTS); |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 277 | } |
| 278 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 279 | static int i801_block_transaction_by_block(union i2c_smbus_data *data, |
| 280 | char read_write, int hwpec) |
| 281 | { |
| 282 | int i, len; |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 283 | int status; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 284 | |
| 285 | inb_p(SMBHSTCNT); /* reset the data buffer index */ |
| 286 | |
| 287 | /* Use 32-byte buffer to process this transaction */ |
| 288 | if (read_write == I2C_SMBUS_WRITE) { |
| 289 | len = data->block[0]; |
| 290 | outb_p(len, SMBHSTDAT0); |
| 291 | for (i = 0; i < len; i++) |
| 292 | outb_p(data->block[i+1], SMBBLKDAT); |
| 293 | } |
| 294 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 295 | status = i801_transaction(I801_BLOCK_DATA | ENABLE_INT9 | |
| 296 | I801_PEC_EN * hwpec); |
| 297 | if (status) |
| 298 | return status; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 299 | |
| 300 | if (read_write == I2C_SMBUS_READ) { |
| 301 | len = inb_p(SMBHSTDAT0); |
| 302 | if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 303 | return -EPROTO; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 304 | |
| 305 | data->block[0] = len; |
| 306 | for (i = 0; i < len; i++) |
| 307 | data->block[i + 1] = inb_p(SMBBLKDAT); |
| 308 | } |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | 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] | 313 | char read_write, int command, |
| 314 | int hwpec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
| 316 | int i, len; |
| 317 | int smbcmd; |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 318 | int status; |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 319 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | int timeout; |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 321 | |
| 322 | result = i801_check_pre(); |
| 323 | if (result < 0) |
| 324 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 326 | len = data->block[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
| 328 | if (read_write == I2C_SMBUS_WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | outb_p(len, SMBHSTDAT0); |
| 330 | outb_p(data->block[1], SMBBLKDAT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | for (i = 1; i <= len; i++) { |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 334 | if (i == len && read_write == I2C_SMBUS_READ) { |
| 335 | if (command == I2C_SMBUS_I2C_BLOCK_DATA) |
| 336 | smbcmd = I801_I2C_BLOCK_LAST; |
| 337 | else |
| 338 | smbcmd = I801_BLOCK_LAST; |
| 339 | } else { |
| 340 | if (command == I2C_SMBUS_I2C_BLOCK_DATA |
| 341 | && read_write == I2C_SMBUS_READ) |
| 342 | smbcmd = I801_I2C_BLOCK_DATA; |
| 343 | else |
| 344 | smbcmd = I801_BLOCK_DATA; |
| 345 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | outb_p(smbcmd | ENABLE_INT9, SMBHSTCNT); |
| 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | if (i == 1) |
| 349 | outb_p(inb(SMBHSTCNT) | I801_START, SMBHSTCNT); |
| 350 | |
| 351 | /* We will always wait for a fraction of a second! */ |
| 352 | timeout = 0; |
| 353 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | msleep(1); |
Jean Delvare | 2b73809 | 2008-07-14 22:38:32 +0200 | [diff] [blame] | 355 | status = inb_p(SMBHSTSTS); |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 356 | } while ((!(status & SMBHSTSTS_BYTE_DONE)) |
| 357 | && (timeout++ < MAX_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
Roel Kluin | 4ccc28f | 2009-05-05 08:39:24 +0200 | [diff] [blame] | 359 | result = i801_check_post(status, timeout > MAX_TIMEOUT); |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 360 | if (result < 0) |
| 361 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 363 | if (i == 1 && read_write == I2C_SMBUS_READ |
| 364 | && command != I2C_SMBUS_I2C_BLOCK_DATA) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | len = inb_p(SMBHSTDAT0); |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 366 | if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) { |
| 367 | dev_err(&I801_dev->dev, |
| 368 | "Illegal SMBus block read size %d\n", |
| 369 | len); |
| 370 | /* Recover */ |
| 371 | while (inb_p(SMBHSTSTS) & SMBHSTSTS_HOST_BUSY) |
| 372 | outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS); |
| 373 | outb_p(SMBHSTSTS_INTR, SMBHSTSTS); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 374 | return -EPROTO; |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 375 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | data->block[0] = len; |
| 377 | } |
| 378 | |
| 379 | /* Retrieve/store value in SMBBLKDAT */ |
| 380 | if (read_write == I2C_SMBUS_READ) |
| 381 | data->block[i] = inb_p(SMBBLKDAT); |
| 382 | if (read_write == I2C_SMBUS_WRITE && i+1 <= len) |
| 383 | outb_p(data->block[i+1], SMBBLKDAT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 385 | /* signals SMBBLKDAT ready */ |
| 386 | outb_p(SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR, SMBHSTSTS); |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 387 | } |
Jean Delvare | cf898dc | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 388 | |
| 389 | return 0; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | static int i801_set_block_buffer_mode(void) |
| 393 | { |
| 394 | outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_E32B, SMBAUXCTL); |
| 395 | if ((inb_p(SMBAUXCTL) & SMBAUXCTL_E32B) == 0) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 396 | return -EIO; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | /* Block transaction function */ |
| 401 | static int i801_block_transaction(union i2c_smbus_data *data, char read_write, |
| 402 | int command, int hwpec) |
| 403 | { |
| 404 | int result = 0; |
| 405 | unsigned char hostc; |
| 406 | |
| 407 | if (command == I2C_SMBUS_I2C_BLOCK_DATA) { |
| 408 | if (read_write == I2C_SMBUS_WRITE) { |
| 409 | /* set I2C_EN bit in configuration register */ |
| 410 | pci_read_config_byte(I801_dev, SMBHSTCFG, &hostc); |
| 411 | pci_write_config_byte(I801_dev, SMBHSTCFG, |
| 412 | hostc | SMBHSTCFG_I2C_EN); |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 413 | } else if (!(i801_features & FEATURE_I2C_BLOCK_READ)) { |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 414 | dev_err(&I801_dev->dev, |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 415 | "I2C block read is unsupported!\n"); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 416 | return -EOPNOTSUPP; |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 417 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 420 | if (read_write == I2C_SMBUS_WRITE |
| 421 | || command == I2C_SMBUS_I2C_BLOCK_DATA) { |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 422 | if (data->block[0] < 1) |
| 423 | data->block[0] = 1; |
| 424 | if (data->block[0] > I2C_SMBUS_BLOCK_MAX) |
| 425 | data->block[0] = I2C_SMBUS_BLOCK_MAX; |
| 426 | } else { |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 427 | data->block[0] = 32; /* max for SMBus block reads */ |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 428 | } |
| 429 | |
Jean Delvare | c074c39 | 2010-03-13 20:56:53 +0100 | [diff] [blame] | 430 | /* Experience has shown that the block buffer can only be used for |
| 431 | SMBus (not I2C) block transactions, even though the datasheet |
| 432 | doesn't mention this limitation. */ |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 433 | if ((i801_features & FEATURE_BLOCK_BUFFER) |
Jean Delvare | c074c39 | 2010-03-13 20:56:53 +0100 | [diff] [blame] | 434 | && command != I2C_SMBUS_I2C_BLOCK_DATA |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 435 | && i801_set_block_buffer_mode() == 0) |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 436 | result = i801_block_transaction_by_block(data, read_write, |
| 437 | hwpec); |
| 438 | else |
| 439 | result = i801_block_transaction_byte_by_byte(data, read_write, |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 440 | command, hwpec); |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 441 | |
| 442 | if (result == 0 && hwpec) |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 443 | i801_wait_hwpec(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 445 | if (command == I2C_SMBUS_I2C_BLOCK_DATA |
| 446 | && read_write == I2C_SMBUS_WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | /* restore saved configuration register value */ |
| 448 | pci_write_config_byte(I801_dev, SMBHSTCFG, hostc); |
| 449 | } |
| 450 | return result; |
| 451 | } |
| 452 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 453 | /* Return negative errno on error. */ |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 454 | static s32 i801_access(struct i2c_adapter *adap, u16 addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | unsigned short flags, char read_write, u8 command, |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 456 | int size, union i2c_smbus_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | { |
Jean Delvare | e8aac4a | 2005-10-26 21:34:42 +0200 | [diff] [blame] | 458 | int hwpec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | int block = 0; |
| 460 | int ret, xact = 0; |
| 461 | |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 462 | hwpec = (i801_features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC) |
Jean Delvare | e8aac4a | 2005-10-26 21:34:42 +0200 | [diff] [blame] | 463 | && size != I2C_SMBUS_QUICK |
| 464 | && size != I2C_SMBUS_I2C_BLOCK_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
| 466 | switch (size) { |
| 467 | case I2C_SMBUS_QUICK: |
| 468 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 469 | SMBHSTADD); |
| 470 | xact = I801_QUICK; |
| 471 | break; |
| 472 | case I2C_SMBUS_BYTE: |
| 473 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 474 | SMBHSTADD); |
| 475 | if (read_write == I2C_SMBUS_WRITE) |
| 476 | outb_p(command, SMBHSTCMD); |
| 477 | xact = I801_BYTE; |
| 478 | break; |
| 479 | case I2C_SMBUS_BYTE_DATA: |
| 480 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 481 | SMBHSTADD); |
| 482 | outb_p(command, SMBHSTCMD); |
| 483 | if (read_write == I2C_SMBUS_WRITE) |
| 484 | outb_p(data->byte, SMBHSTDAT0); |
| 485 | xact = I801_BYTE_DATA; |
| 486 | break; |
| 487 | case I2C_SMBUS_WORD_DATA: |
| 488 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 489 | SMBHSTADD); |
| 490 | outb_p(command, SMBHSTCMD); |
| 491 | if (read_write == I2C_SMBUS_WRITE) { |
| 492 | outb_p(data->word & 0xff, SMBHSTDAT0); |
| 493 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
| 494 | } |
| 495 | xact = I801_WORD_DATA; |
| 496 | break; |
| 497 | case I2C_SMBUS_BLOCK_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 499 | SMBHSTADD); |
| 500 | outb_p(command, SMBHSTCMD); |
| 501 | block = 1; |
| 502 | break; |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 503 | case I2C_SMBUS_I2C_BLOCK_DATA: |
| 504 | /* NB: page 240 of ICH5 datasheet shows that the R/#W |
| 505 | * bit should be cleared here, even when reading */ |
| 506 | outb_p((addr & 0x7f) << 1, SMBHSTADD); |
| 507 | if (read_write == I2C_SMBUS_READ) { |
| 508 | /* NB: page 240 of ICH5 datasheet also shows |
| 509 | * that DATA1 is the cmd field when reading */ |
| 510 | outb_p(command, SMBHSTDAT1); |
| 511 | } else |
| 512 | outb_p(command, SMBHSTCMD); |
| 513 | block = 1; |
| 514 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | default: |
| 516 | dev_err(&I801_dev->dev, "Unsupported transaction %d\n", size); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 517 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | } |
| 519 | |
Oleg Ryjkov | ca8b9e3 | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 520 | if (hwpec) /* enable/disable hardware PEC */ |
| 521 | outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_CRC, SMBAUXCTL); |
| 522 | else |
| 523 | outb_p(inb_p(SMBAUXCTL) & (~SMBAUXCTL_CRC), SMBAUXCTL); |
Jean Delvare | e8aac4a | 2005-10-26 21:34:42 +0200 | [diff] [blame] | 524 | |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 525 | if (block) |
Jean Delvare | 585b316 | 2005-10-26 21:31:15 +0200 | [diff] [blame] | 526 | ret = i801_block_transaction(data, read_write, size, hwpec); |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 527 | else |
| 528 | ret = i801_transaction(xact | ENABLE_INT9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
Jean Delvare | c79cfba | 2006-04-20 02:43:18 -0700 | [diff] [blame] | 530 | /* 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] | 531 | time, so we forcibly disable it after every transaction. Turn off |
| 532 | E32B for the same reason. */ |
Jean Delvare | a0921b6 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 533 | if (hwpec || block) |
Oleg Ryjkov | 7edcb9a | 2007-07-12 14:12:31 +0200 | [diff] [blame] | 534 | outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), |
| 535 | SMBAUXCTL); |
Jean Delvare | c79cfba | 2006-04-20 02:43:18 -0700 | [diff] [blame] | 536 | |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 537 | if (block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | return ret; |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 539 | if (ret) |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 540 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK)) |
| 542 | return 0; |
| 543 | |
| 544 | switch (xact & 0x7f) { |
| 545 | case I801_BYTE: /* Result put in SMBHSTDAT0 */ |
| 546 | case I801_BYTE_DATA: |
| 547 | data->byte = inb_p(SMBHSTDAT0); |
| 548 | break; |
| 549 | case I801_WORD_DATA: |
| 550 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); |
| 551 | break; |
| 552 | } |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | |
| 557 | static u32 i801_func(struct i2c_adapter *adapter) |
| 558 | { |
| 559 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 560 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
| 561 | I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 562 | ((i801_features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) | |
| 563 | ((i801_features & FEATURE_I2C_BLOCK_READ) ? |
| 564 | I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | } |
| 566 | |
Jean Delvare | 8f9082c | 2006-09-03 22:39:46 +0200 | [diff] [blame] | 567 | static const struct i2c_algorithm smbus_algorithm = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | .smbus_xfer = i801_access, |
| 569 | .functionality = i801_func, |
| 570 | }; |
| 571 | |
| 572 | static struct i2c_adapter i801_adapter = { |
| 573 | .owner = THIS_MODULE, |
Jean Delvare | 3401b2f | 2008-07-14 22:38:29 +0200 | [diff] [blame] | 574 | .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | .algo = &smbus_algorithm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | }; |
| 577 | |
Márton Németh | 4111ecd | 2010-03-02 12:23:37 +0100 | [diff] [blame] | 578 | static const struct pci_device_id i801_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) }, |
| 580 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) }, |
| 581 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) }, |
| 582 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) }, |
| 583 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) }, |
| 584 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) }, |
| 585 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) }, |
| 586 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) }, |
| 587 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) }, |
Jason Gaston | b0a70b5 | 2005-04-16 15:24:45 -0700 | [diff] [blame] | 588 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) }, |
Jason Gaston | 8254fc4 | 2006-01-09 10:58:08 -0800 | [diff] [blame] | 589 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) }, |
Jason Gaston | adbc2a1 | 2006-11-22 15:19:12 -0800 | [diff] [blame] | 590 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) }, |
Seth Heasley | cb04e95 | 2010-10-04 13:27:14 -0700 | [diff] [blame] | 591 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EP80579_1) }, |
Gaston, Jason D | d28dc71 | 2008-02-24 20:03:42 +0100 | [diff] [blame] | 592 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_4) }, |
| 593 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_5) }, |
Seth Heasley | cb04e95 | 2010-10-04 13:27:14 -0700 | [diff] [blame] | 594 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS) }, |
| 595 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS) }, |
Seth Heasley | e30d985 | 2010-10-31 21:06:59 +0100 | [diff] [blame^] | 596 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | { 0, } |
| 598 | }; |
| 599 | |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 600 | MODULE_DEVICE_TABLE(pci, i801_ids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Jean Delvare | 1561bfe | 2009-01-07 14:29:17 +0100 | [diff] [blame] | 602 | #if defined CONFIG_INPUT_APANEL || defined CONFIG_INPUT_APANEL_MODULE |
| 603 | static unsigned char apanel_addr; |
| 604 | |
| 605 | /* Scan the system ROM for the signature "FJKEYINF" */ |
| 606 | static __init const void __iomem *bios_signature(const void __iomem *bios) |
| 607 | { |
| 608 | ssize_t offset; |
| 609 | const unsigned char signature[] = "FJKEYINF"; |
| 610 | |
| 611 | for (offset = 0; offset < 0x10000; offset += 0x10) { |
| 612 | if (check_signature(bios + offset, signature, |
| 613 | sizeof(signature)-1)) |
| 614 | return bios + offset; |
| 615 | } |
| 616 | return NULL; |
| 617 | } |
| 618 | |
| 619 | static void __init input_apanel_init(void) |
| 620 | { |
| 621 | void __iomem *bios; |
| 622 | const void __iomem *p; |
| 623 | |
| 624 | bios = ioremap(0xF0000, 0x10000); /* Can't fail */ |
| 625 | p = bios_signature(bios); |
| 626 | if (p) { |
| 627 | /* just use the first address */ |
| 628 | apanel_addr = readb(p + 8 + 3) >> 1; |
| 629 | } |
| 630 | iounmap(bios); |
| 631 | } |
| 632 | #else |
| 633 | static void __init input_apanel_init(void) {} |
| 634 | #endif |
| 635 | |
Hans de Goede | fa5bfab | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 636 | #if defined CONFIG_SENSORS_FSCHMD || defined CONFIG_SENSORS_FSCHMD_MODULE |
| 637 | struct dmi_onboard_device_info { |
| 638 | const char *name; |
| 639 | u8 type; |
| 640 | unsigned short i2c_addr; |
| 641 | const char *i2c_type; |
| 642 | }; |
| 643 | |
| 644 | static struct dmi_onboard_device_info __devinitdata dmi_devices[] = { |
| 645 | { "Syleus", DMI_DEV_TYPE_OTHER, 0x73, "fscsyl" }, |
| 646 | { "Hermes", DMI_DEV_TYPE_OTHER, 0x73, "fscher" }, |
| 647 | { "Hades", DMI_DEV_TYPE_OTHER, 0x73, "fschds" }, |
| 648 | }; |
| 649 | |
| 650 | static void __devinit dmi_check_onboard_device(u8 type, const char *name, |
| 651 | struct i2c_adapter *adap) |
| 652 | { |
| 653 | int i; |
| 654 | struct i2c_board_info info; |
| 655 | |
| 656 | for (i = 0; i < ARRAY_SIZE(dmi_devices); i++) { |
| 657 | /* & ~0x80, ignore enabled/disabled bit */ |
| 658 | if ((type & ~0x80) != dmi_devices[i].type) |
| 659 | continue; |
Jean Delvare | faabd47 | 2010-07-09 16:22:51 +0200 | [diff] [blame] | 660 | if (strcasecmp(name, dmi_devices[i].name)) |
Hans de Goede | fa5bfab | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 661 | continue; |
| 662 | |
| 663 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 664 | info.addr = dmi_devices[i].i2c_addr; |
| 665 | strlcpy(info.type, dmi_devices[i].i2c_type, I2C_NAME_SIZE); |
| 666 | i2c_new_device(adap, &info); |
| 667 | break; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | /* We use our own function to check for onboard devices instead of |
| 672 | dmi_find_device() as some buggy BIOS's have the devices we are interested |
| 673 | in marked as disabled */ |
| 674 | static void __devinit dmi_check_onboard_devices(const struct dmi_header *dm, |
| 675 | void *adap) |
| 676 | { |
| 677 | int i, count; |
| 678 | |
| 679 | if (dm->type != 10) |
| 680 | return; |
| 681 | |
| 682 | count = (dm->length - sizeof(struct dmi_header)) / 2; |
| 683 | for (i = 0; i < count; i++) { |
| 684 | const u8 *d = (char *)(dm + 1) + (i * 2); |
| 685 | const char *name = ((char *) dm) + dm->length; |
| 686 | u8 type = d[0]; |
| 687 | u8 s = d[1]; |
| 688 | |
| 689 | if (!s) |
| 690 | continue; |
| 691 | s--; |
| 692 | while (s > 0 && name[0]) { |
| 693 | name += strlen(name) + 1; |
| 694 | s--; |
| 695 | } |
| 696 | if (name[0] == 0) /* Bogus string reference */ |
| 697 | continue; |
| 698 | |
| 699 | dmi_check_onboard_device(type, name, adap); |
| 700 | } |
| 701 | } |
| 702 | #endif |
| 703 | |
Ivo Manca | 3fb21c6 | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 704 | static int __devinit i801_probe(struct pci_dev *dev, |
| 705 | const struct pci_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | { |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 707 | unsigned char temp; |
Jean Delvare | adff687 | 2010-05-21 18:40:54 +0200 | [diff] [blame] | 708 | int err, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 710 | I801_dev = dev; |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 711 | i801_features = 0; |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 712 | switch (dev->device) { |
Jean Delvare | e0e8398c | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 713 | default: |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 714 | i801_features |= FEATURE_I2C_BLOCK_READ; |
| 715 | /* fall through */ |
| 716 | case PCI_DEVICE_ID_INTEL_82801DB_3: |
Jean Delvare | 369f6f4 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 717 | i801_features |= FEATURE_SMBUS_PEC; |
| 718 | i801_features |= FEATURE_BLOCK_BUFFER; |
Jean Delvare | e0e8398c | 2010-05-21 18:40:55 +0200 | [diff] [blame] | 719 | /* fall through */ |
| 720 | case PCI_DEVICE_ID_INTEL_82801CA_3: |
| 721 | case PCI_DEVICE_ID_INTEL_82801BA_2: |
| 722 | case PCI_DEVICE_ID_INTEL_82801AB_3: |
| 723 | case PCI_DEVICE_ID_INTEL_82801AA_3: |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 724 | break; |
Jean Delvare | 250d1bd | 2006-12-10 21:21:33 +0100 | [diff] [blame] | 725 | } |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 726 | |
Jean Delvare | adff687 | 2010-05-21 18:40:54 +0200 | [diff] [blame] | 727 | /* Disable features on user request */ |
| 728 | for (i = 0; i < ARRAY_SIZE(i801_feature_names); i++) { |
| 729 | if (i801_features & disable_features & (1 << i)) |
| 730 | dev_notice(&dev->dev, "%s disabled by user\n", |
| 731 | i801_feature_names[i]); |
| 732 | } |
| 733 | i801_features &= ~disable_features; |
| 734 | |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 735 | err = pci_enable_device(dev); |
| 736 | if (err) { |
| 737 | dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n", |
| 738 | err); |
| 739 | goto exit; |
| 740 | } |
| 741 | |
| 742 | /* Determine the address of the SMBus area */ |
| 743 | i801_smba = pci_resource_start(dev, SMBBAR); |
| 744 | if (!i801_smba) { |
| 745 | dev_err(&dev->dev, "SMBus base address uninitialized, " |
| 746 | "upgrade BIOS\n"); |
| 747 | err = -ENODEV; |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 748 | goto exit; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 749 | } |
| 750 | |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 751 | err = acpi_check_resource_conflict(&dev->resource[SMBBAR]); |
Jean Delvare | 18669ea | 2009-10-04 22:53:45 +0200 | [diff] [blame] | 752 | if (err) { |
| 753 | err = -ENODEV; |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 754 | goto exit; |
Jean Delvare | 18669ea | 2009-10-04 22:53:45 +0200 | [diff] [blame] | 755 | } |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 756 | |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 757 | err = pci_request_region(dev, SMBBAR, i801_driver.name); |
| 758 | if (err) { |
| 759 | dev_err(&dev->dev, "Failed to request SMBus region " |
Andrew Morton | 598736c | 2006-06-30 01:56:20 -0700 | [diff] [blame] | 760 | "0x%lx-0x%Lx\n", i801_smba, |
| 761 | (unsigned long long)pci_resource_end(dev, SMBBAR)); |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 762 | goto exit; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | pci_read_config_byte(I801_dev, SMBHSTCFG, &temp); |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 766 | i801_original_hstcfg = temp; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 767 | temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */ |
| 768 | if (!(temp & SMBHSTCFG_HST_EN)) { |
| 769 | dev_info(&dev->dev, "Enabling SMBus device\n"); |
| 770 | temp |= SMBHSTCFG_HST_EN; |
| 771 | } |
| 772 | pci_write_config_byte(I801_dev, SMBHSTCFG, temp); |
| 773 | |
| 774 | if (temp & SMBHSTCFG_SMB_SMI_EN) |
| 775 | dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n"); |
| 776 | else |
| 777 | dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Jean Delvare | a0921b6 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 779 | /* Clear special mode bits */ |
| 780 | if (i801_features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER)) |
| 781 | outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), |
| 782 | SMBAUXCTL); |
| 783 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 784 | /* set up the sysfs linkage to our parent device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | i801_adapter.dev.parent = &dev->dev; |
| 786 | |
Jean Delvare | 7e2193a | 2009-12-06 17:06:27 +0100 | [diff] [blame] | 787 | /* Retry up to 3 times on lost arbitration */ |
| 788 | i801_adapter.retries = 3; |
| 789 | |
David Brownell | 2096b95 | 2007-05-01 23:26:28 +0200 | [diff] [blame] | 790 | snprintf(i801_adapter.name, sizeof(i801_adapter.name), |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 791 | "SMBus I801 adapter at %04lx", i801_smba); |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 792 | err = i2c_add_adapter(&i801_adapter); |
| 793 | if (err) { |
| 794 | dev_err(&dev->dev, "Failed to add SMBus adapter\n"); |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 795 | goto exit_release; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 796 | } |
Jean Delvare | 1561bfe | 2009-01-07 14:29:17 +0100 | [diff] [blame] | 797 | |
| 798 | /* Register optional slaves */ |
| 799 | #if defined CONFIG_INPUT_APANEL || defined CONFIG_INPUT_APANEL_MODULE |
| 800 | if (apanel_addr) { |
| 801 | struct i2c_board_info info; |
| 802 | |
| 803 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 804 | info.addr = apanel_addr; |
| 805 | strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE); |
| 806 | i2c_new_device(&i801_adapter, &info); |
| 807 | } |
| 808 | #endif |
Hans de Goede | fa5bfab | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 809 | #if defined CONFIG_SENSORS_FSCHMD || defined CONFIG_SENSORS_FSCHMD_MODULE |
Jean Delvare | faabd47 | 2010-07-09 16:22:51 +0200 | [diff] [blame] | 810 | if (dmi_name_in_vendors("FUJITSU")) |
Hans de Goede | fa5bfab | 2009-03-30 21:46:44 +0200 | [diff] [blame] | 811 | dmi_walk(dmi_check_onboard_devices, &i801_adapter); |
| 812 | #endif |
Jean Delvare | 1561bfe | 2009-01-07 14:29:17 +0100 | [diff] [blame] | 813 | |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 814 | return 0; |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 815 | |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 816 | exit_release: |
| 817 | pci_release_region(dev, SMBBAR); |
Jean Delvare | 02dd7ae | 2006-06-12 21:53:41 +0200 | [diff] [blame] | 818 | exit: |
| 819 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | static void __devexit i801_remove(struct pci_dev *dev) |
| 823 | { |
| 824 | i2c_del_adapter(&i801_adapter); |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 825 | pci_write_config_byte(I801_dev, SMBHSTCFG, i801_original_hstcfg); |
Jean Delvare | 6dcc19d | 2006-06-12 21:53:02 +0200 | [diff] [blame] | 826 | pci_release_region(dev, SMBBAR); |
Daniel Ritz | d6fcb3b | 2006-06-27 18:40:54 +0200 | [diff] [blame] | 827 | /* |
| 828 | * do not call pci_disable_device(dev) since it can cause hard hangs on |
| 829 | * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010) |
| 830 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 833 | #ifdef CONFIG_PM |
| 834 | static int i801_suspend(struct pci_dev *dev, pm_message_t mesg) |
| 835 | { |
| 836 | pci_save_state(dev); |
| 837 | pci_write_config_byte(dev, SMBHSTCFG, i801_original_hstcfg); |
| 838 | pci_set_power_state(dev, pci_choose_state(dev, mesg)); |
| 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | static int i801_resume(struct pci_dev *dev) |
| 843 | { |
| 844 | pci_set_power_state(dev, PCI_D0); |
| 845 | pci_restore_state(dev); |
| 846 | return pci_enable_device(dev); |
| 847 | } |
| 848 | #else |
| 849 | #define i801_suspend NULL |
| 850 | #define i801_resume NULL |
| 851 | #endif |
| 852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | static struct pci_driver i801_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | .name = "i801_smbus", |
| 855 | .id_table = i801_ids, |
| 856 | .probe = i801_probe, |
| 857 | .remove = __devexit_p(i801_remove), |
Jean Delvare | a5aaea3 | 2007-03-22 19:49:01 +0100 | [diff] [blame] | 858 | .suspend = i801_suspend, |
| 859 | .resume = i801_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | }; |
| 861 | |
| 862 | static int __init i2c_i801_init(void) |
| 863 | { |
Jean Delvare | 1561bfe | 2009-01-07 14:29:17 +0100 | [diff] [blame] | 864 | input_apanel_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | return pci_register_driver(&i801_driver); |
| 866 | } |
| 867 | |
| 868 | static void __exit i2c_i801_exit(void) |
| 869 | { |
| 870 | pci_unregister_driver(&i801_driver); |
| 871 | } |
| 872 | |
Jean Delvare | 6342064 | 2008-01-27 18:14:50 +0100 | [diff] [blame] | 873 | MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>, " |
| 874 | "Jean Delvare <khali@linux-fr.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | MODULE_DESCRIPTION("I801 SMBus driver"); |
| 876 | MODULE_LICENSE("GPL"); |
| 877 | |
| 878 | module_init(i2c_i801_init); |
| 879 | module_exit(i2c_i801_exit); |