Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | i2c-ali1535.c - Part of lm_sensors, Linux kernel modules for hardware |
| 3 | monitoring |
| 4 | Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, |
| 5 | Philip Edelbrock <phil@netroedge.com>, |
| 6 | Mark D. Studebaker <mdsxyz123@yahoo.com>, |
| 7 | Dan Eaton <dan.eaton@rocketlogix.com> and |
| 8 | Stephen Rousset<stephen.rousset@rocketlogix.com> |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | This is the driver for the SMB Host controller on |
| 27 | Acer Labs Inc. (ALI) M1535 South Bridge. |
| 28 | |
| 29 | The M1535 is a South bridge for portable systems. |
| 30 | It is very similar to the M15x3 South bridges also produced |
| 31 | by Acer Labs Inc. Some of the registers within the part |
| 32 | have moved and some have been redefined slightly. Additionally, |
| 33 | the sequencing of the SMBus transactions has been modified |
| 34 | to be more consistent with the sequencing recommended by |
| 35 | the manufacturer and observed through testing. These |
| 36 | changes are reflected in this driver and can be identified |
| 37 | by comparing this driver to the i2c-ali15x3 driver. |
| 38 | For an overview of these chips see http://www.acerlabs.com |
| 39 | |
| 40 | The SMB controller is part of the 7101 device, which is an |
| 41 | ACPI-compliant Power Management Unit (PMU). |
| 42 | |
| 43 | The whole 7101 device has to be enabled for the SMB to work. |
| 44 | You can't just enable the SMB alone. |
| 45 | The SMB and the ACPI have separate I/O spaces. |
| 46 | We make sure that the SMB is enabled. We leave the ACPI alone. |
| 47 | |
| 48 | This driver controls the SMB Host only. |
| 49 | |
| 50 | This driver does not use interrupts. |
| 51 | */ |
| 52 | |
| 53 | |
| 54 | /* Note: we assume there can only be one ALI1535, with one SMBus interface */ |
| 55 | |
| 56 | #include <linux/config.h> |
| 57 | #include <linux/module.h> |
| 58 | #include <linux/pci.h> |
| 59 | #include <linux/kernel.h> |
| 60 | #include <linux/stddef.h> |
| 61 | #include <linux/sched.h> |
| 62 | #include <linux/delay.h> |
| 63 | #include <linux/ioport.h> |
| 64 | #include <linux/i2c.h> |
| 65 | #include <linux/init.h> |
| 66 | #include <asm/io.h> |
| 67 | #include <asm/semaphore.h> |
| 68 | |
| 69 | |
| 70 | /* ALI1535 SMBus address offsets */ |
| 71 | #define SMBHSTSTS (0 + ali1535_smba) |
| 72 | #define SMBHSTTYP (1 + ali1535_smba) |
| 73 | #define SMBHSTPORT (2 + ali1535_smba) |
| 74 | #define SMBHSTCMD (7 + ali1535_smba) |
| 75 | #define SMBHSTADD (3 + ali1535_smba) |
| 76 | #define SMBHSTDAT0 (4 + ali1535_smba) |
| 77 | #define SMBHSTDAT1 (5 + ali1535_smba) |
| 78 | #define SMBBLKDAT (6 + ali1535_smba) |
| 79 | |
| 80 | /* PCI Address Constants */ |
| 81 | #define SMBCOM 0x004 |
| 82 | #define SMBREV 0x008 |
| 83 | #define SMBCFG 0x0D1 |
| 84 | #define SMBBA 0x0E2 |
| 85 | #define SMBHSTCFG 0x0F0 |
| 86 | #define SMBCLK 0x0F2 |
| 87 | |
| 88 | /* Other settings */ |
| 89 | #define MAX_TIMEOUT 500 /* times 1/100 sec */ |
| 90 | #define ALI1535_SMB_IOSIZE 32 |
| 91 | |
| 92 | #define ALI1535_SMB_DEFAULTBASE 0x8040 |
| 93 | |
| 94 | /* ALI1535 address lock bits */ |
| 95 | #define ALI1535_LOCK 0x06 /* dwe */ |
| 96 | |
| 97 | /* ALI1535 command constants */ |
| 98 | #define ALI1535_QUICK 0x00 |
| 99 | #define ALI1535_BYTE 0x10 |
| 100 | #define ALI1535_BYTE_DATA 0x20 |
| 101 | #define ALI1535_WORD_DATA 0x30 |
| 102 | #define ALI1535_BLOCK_DATA 0x40 |
| 103 | #define ALI1535_I2C_READ 0x60 |
| 104 | |
| 105 | #define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ |
| 106 | /* I2C read */ |
| 107 | #define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ |
| 108 | #define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ |
| 109 | /* Alert-Response-Address */ |
| 110 | /* (read) */ |
| 111 | #define ALI1535_KILL 0x04 /* Kill Command (write) */ |
| 112 | #define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ |
| 113 | /* Alert-Response-Address */ |
| 114 | /* (read) */ |
| 115 | |
| 116 | #define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ |
| 117 | /* of 10-bit address in I2C */ |
| 118 | /* Read Command */ |
| 119 | |
| 120 | /* ALI1535 status register bits */ |
| 121 | #define ALI1535_STS_IDLE 0x04 |
| 122 | #define ALI1535_STS_BUSY 0x08 /* host busy */ |
| 123 | #define ALI1535_STS_DONE 0x10 /* transaction complete */ |
| 124 | #define ALI1535_STS_DEV 0x20 /* device error */ |
| 125 | #define ALI1535_STS_BUSERR 0x40 /* bus error */ |
| 126 | #define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ |
| 127 | #define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ |
| 128 | |
| 129 | #define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ |
| 130 | |
| 131 | /* ALI1535 device address register bits */ |
| 132 | #define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ |
| 133 | /* Address field */ |
| 134 | /* -> Write = 0 */ |
| 135 | /* -> Read = 1 */ |
| 136 | #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ |
| 137 | |
| 138 | |
| 139 | static unsigned short ali1535_smba; |
| 140 | static DECLARE_MUTEX(i2c_ali1535_sem); |
| 141 | |
| 142 | /* Detect whether a ALI1535 can be found, and initialize it, where necessary. |
| 143 | Note the differences between kernels with the old PCI BIOS interface and |
| 144 | newer kernels with the real PCI interface. In compat.h some things are |
| 145 | defined to make the transition easier. */ |
| 146 | static int ali1535_setup(struct pci_dev *dev) |
| 147 | { |
| 148 | int retval = -ENODEV; |
| 149 | unsigned char temp; |
| 150 | |
| 151 | /* Check the following things: |
| 152 | - SMB I/O address is initialized |
| 153 | - Device is enabled |
| 154 | - We can use the addresses |
| 155 | */ |
| 156 | |
| 157 | /* Determine the address of the SMBus area */ |
| 158 | pci_read_config_word(dev, SMBBA, &ali1535_smba); |
| 159 | ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); |
| 160 | if (ali1535_smba == 0) { |
| 161 | dev_warn(&dev->dev, |
| 162 | "ALI1535_smb region uninitialized - upgrade BIOS?\n"); |
| 163 | goto exit; |
| 164 | } |
| 165 | |
| 166 | if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, "ali1535-smb")) { |
| 167 | dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n", |
| 168 | ali1535_smba); |
| 169 | goto exit; |
| 170 | } |
| 171 | |
| 172 | /* check if whole device is enabled */ |
| 173 | pci_read_config_byte(dev, SMBCFG, &temp); |
| 174 | if ((temp & ALI1535_SMBIO_EN) == 0) { |
| 175 | dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); |
| 176 | goto exit_free; |
| 177 | } |
| 178 | |
| 179 | /* Is SMB Host controller enabled? */ |
| 180 | pci_read_config_byte(dev, SMBHSTCFG, &temp); |
| 181 | if ((temp & 1) == 0) { |
| 182 | dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n"); |
| 183 | goto exit_free; |
| 184 | } |
| 185 | |
| 186 | /* set SMB clock to 74KHz as recommended in data sheet */ |
| 187 | pci_write_config_byte(dev, SMBCLK, 0x20); |
| 188 | |
| 189 | /* |
| 190 | The interrupt routing for SMB is set up in register 0x77 in the |
| 191 | 1533 ISA Bridge device, NOT in the 7101 device. |
| 192 | Don't bother with finding the 1533 device and reading the register. |
| 193 | if ((....... & 0x0F) == 1) |
| 194 | dev_dbg(&dev->dev, "ALI1535 using Interrupt 9 for SMBus.\n"); |
| 195 | */ |
| 196 | pci_read_config_byte(dev, SMBREV, &temp); |
| 197 | dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp); |
| 198 | dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba); |
| 199 | |
| 200 | retval = 0; |
| 201 | exit: |
| 202 | return retval; |
| 203 | |
| 204 | exit_free: |
| 205 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); |
| 206 | return retval; |
| 207 | } |
| 208 | |
| 209 | static int ali1535_transaction(struct i2c_adapter *adap) |
| 210 | { |
| 211 | int temp; |
| 212 | int result = 0; |
| 213 | int timeout = 0; |
| 214 | |
| 215 | dev_dbg(&adap->dev, "Transaction (pre): STS=%02x, TYP=%02x, " |
| 216 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", |
| 217 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), |
| 218 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); |
| 219 | |
| 220 | /* get status */ |
| 221 | temp = inb_p(SMBHSTSTS); |
| 222 | |
| 223 | /* Make sure the SMBus host is ready to start transmitting */ |
| 224 | /* Check the busy bit first */ |
| 225 | if (temp & ALI1535_STS_BUSY) { |
| 226 | /* If the host controller is still busy, it may have timed out |
| 227 | * in the previous transaction, resulting in a "SMBus Timeout" |
| 228 | * printk. I've tried the following to reset a stuck busy bit. |
| 229 | * 1. Reset the controller with an KILL command. (this |
| 230 | * doesn't seem to clear the controller if an external |
| 231 | * device is hung) |
| 232 | * 2. Reset the controller and the other SMBus devices with a |
| 233 | * T_OUT command. (this clears the host busy bit if an |
| 234 | * external device is hung, but it comes back upon a new |
| 235 | * access to a device) |
| 236 | * 3. Disable and reenable the controller in SMBHSTCFG. Worst |
| 237 | * case, nothing seems to work except power reset. |
| 238 | */ |
| 239 | |
| 240 | /* Try resetting entire SMB bus, including other devices - This |
| 241 | * may not work either - it clears the BUSY bit but then the |
| 242 | * BUSY bit may come back on when you try and use the chip |
| 243 | * again. If that's the case you are stuck. |
| 244 | */ |
| 245 | dev_info(&adap->dev, |
| 246 | "Resetting entire SMB Bus to clear busy condition (%02x)\n", |
| 247 | temp); |
| 248 | outb_p(ALI1535_T_OUT, SMBHSTTYP); |
| 249 | temp = inb_p(SMBHSTSTS); |
| 250 | } |
| 251 | |
| 252 | /* now check the error bits and the busy bit */ |
| 253 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { |
| 254 | /* do a clear-on-write */ |
| 255 | outb_p(0xFF, SMBHSTSTS); |
| 256 | if ((temp = inb_p(SMBHSTSTS)) & |
| 257 | (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { |
| 258 | /* This is probably going to be correctable only by a |
| 259 | * power reset as one of the bits now appears to be |
| 260 | * stuck */ |
| 261 | /* This may be a bus or device with electrical problems. */ |
| 262 | dev_err(&adap->dev, |
| 263 | "SMBus reset failed! (0x%02x) - controller or " |
| 264 | "device on bus is probably hung\n", temp); |
| 265 | return -1; |
| 266 | } |
| 267 | } else { |
| 268 | /* check and clear done bit */ |
| 269 | if (temp & ALI1535_STS_DONE) { |
| 270 | outb_p(temp, SMBHSTSTS); |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | /* start the transaction by writing anything to the start register */ |
| 275 | outb_p(0xFF, SMBHSTPORT); |
| 276 | |
| 277 | /* We will always wait for a fraction of a second! */ |
| 278 | timeout = 0; |
| 279 | do { |
| 280 | msleep(1); |
| 281 | temp = inb_p(SMBHSTSTS); |
| 282 | } while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE)) |
| 283 | && (timeout++ < MAX_TIMEOUT)); |
| 284 | |
| 285 | /* If the SMBus is still busy, we give up */ |
| 286 | if (timeout >= MAX_TIMEOUT) { |
| 287 | result = -1; |
| 288 | dev_err(&adap->dev, "SMBus Timeout!\n"); |
| 289 | } |
| 290 | |
| 291 | if (temp & ALI1535_STS_FAIL) { |
| 292 | result = -1; |
| 293 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); |
| 294 | } |
| 295 | |
| 296 | /* Unfortunately the ALI SMB controller maps "no response" and "bus |
| 297 | * collision" into a single bit. No reponse is the usual case so don't |
| 298 | * do a printk. This means that bus collisions go unreported. |
| 299 | */ |
| 300 | if (temp & ALI1535_STS_BUSERR) { |
| 301 | result = -1; |
| 302 | dev_dbg(&adap->dev, |
| 303 | "Error: no response or bus collision ADD=%02x\n", |
| 304 | inb_p(SMBHSTADD)); |
| 305 | } |
| 306 | |
| 307 | /* haven't ever seen this */ |
| 308 | if (temp & ALI1535_STS_DEV) { |
| 309 | result = -1; |
| 310 | dev_err(&adap->dev, "Error: device error\n"); |
| 311 | } |
| 312 | |
| 313 | /* check to see if the "command complete" indication is set */ |
| 314 | if (!(temp & ALI1535_STS_DONE)) { |
| 315 | result = -1; |
| 316 | dev_err(&adap->dev, "Error: command never completed\n"); |
| 317 | } |
| 318 | |
| 319 | dev_dbg(&adap->dev, "Transaction (post): STS=%02x, TYP=%02x, " |
| 320 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", |
| 321 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), |
| 322 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); |
| 323 | |
| 324 | /* take consequent actions for error conditions */ |
| 325 | if (!(temp & ALI1535_STS_DONE)) { |
| 326 | /* issue "kill" to reset host controller */ |
| 327 | outb_p(ALI1535_KILL,SMBHSTTYP); |
| 328 | outb_p(0xFF,SMBHSTSTS); |
| 329 | } else if (temp & ALI1535_STS_ERR) { |
| 330 | /* issue "timeout" to reset all devices on bus */ |
| 331 | outb_p(ALI1535_T_OUT,SMBHSTTYP); |
| 332 | outb_p(0xFF,SMBHSTSTS); |
| 333 | } |
| 334 | |
| 335 | return result; |
| 336 | } |
| 337 | |
| 338 | /* Return -1 on error. */ |
| 339 | static s32 ali1535_access(struct i2c_adapter *adap, u16 addr, |
| 340 | unsigned short flags, char read_write, u8 command, |
| 341 | int size, union i2c_smbus_data *data) |
| 342 | { |
| 343 | int i, len; |
| 344 | int temp; |
| 345 | int timeout; |
| 346 | s32 result = 0; |
| 347 | |
| 348 | down(&i2c_ali1535_sem); |
| 349 | /* make sure SMBus is idle */ |
| 350 | temp = inb_p(SMBHSTSTS); |
| 351 | for (timeout = 0; |
| 352 | (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); |
| 353 | timeout++) { |
| 354 | msleep(1); |
| 355 | temp = inb_p(SMBHSTSTS); |
| 356 | } |
| 357 | if (timeout >= MAX_TIMEOUT) |
| 358 | dev_warn(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp); |
| 359 | |
| 360 | /* clear status register (clear-on-write) */ |
| 361 | outb_p(0xFF, SMBHSTSTS); |
| 362 | |
| 363 | switch (size) { |
| 364 | case I2C_SMBUS_PROC_CALL: |
| 365 | dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n"); |
| 366 | result = -1; |
| 367 | goto EXIT; |
| 368 | case I2C_SMBUS_QUICK: |
| 369 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 370 | SMBHSTADD); |
| 371 | size = ALI1535_QUICK; |
| 372 | outb_p(size, SMBHSTTYP); /* output command */ |
| 373 | break; |
| 374 | case I2C_SMBUS_BYTE: |
| 375 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 376 | SMBHSTADD); |
| 377 | size = ALI1535_BYTE; |
| 378 | outb_p(size, SMBHSTTYP); /* output command */ |
| 379 | if (read_write == I2C_SMBUS_WRITE) |
| 380 | outb_p(command, SMBHSTCMD); |
| 381 | break; |
| 382 | case I2C_SMBUS_BYTE_DATA: |
| 383 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 384 | SMBHSTADD); |
| 385 | size = ALI1535_BYTE_DATA; |
| 386 | outb_p(size, SMBHSTTYP); /* output command */ |
| 387 | outb_p(command, SMBHSTCMD); |
| 388 | if (read_write == I2C_SMBUS_WRITE) |
| 389 | outb_p(data->byte, SMBHSTDAT0); |
| 390 | break; |
| 391 | case I2C_SMBUS_WORD_DATA: |
| 392 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 393 | SMBHSTADD); |
| 394 | size = ALI1535_WORD_DATA; |
| 395 | outb_p(size, SMBHSTTYP); /* output command */ |
| 396 | outb_p(command, SMBHSTCMD); |
| 397 | if (read_write == I2C_SMBUS_WRITE) { |
| 398 | outb_p(data->word & 0xff, SMBHSTDAT0); |
| 399 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
| 400 | } |
| 401 | break; |
| 402 | case I2C_SMBUS_BLOCK_DATA: |
| 403 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
| 404 | SMBHSTADD); |
| 405 | size = ALI1535_BLOCK_DATA; |
| 406 | outb_p(size, SMBHSTTYP); /* output command */ |
| 407 | outb_p(command, SMBHSTCMD); |
| 408 | if (read_write == I2C_SMBUS_WRITE) { |
| 409 | len = data->block[0]; |
| 410 | if (len < 0) { |
| 411 | len = 0; |
| 412 | data->block[0] = len; |
| 413 | } |
| 414 | if (len > 32) { |
| 415 | len = 32; |
| 416 | data->block[0] = len; |
| 417 | } |
| 418 | outb_p(len, SMBHSTDAT0); |
| 419 | /* Reset SMBBLKDAT */ |
| 420 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); |
| 421 | for (i = 1; i <= len; i++) |
| 422 | outb_p(data->block[i], SMBBLKDAT); |
| 423 | } |
| 424 | break; |
| 425 | } |
| 426 | |
| 427 | if (ali1535_transaction(adap)) { |
| 428 | /* Error in transaction */ |
| 429 | result = -1; |
| 430 | goto EXIT; |
| 431 | } |
| 432 | |
| 433 | if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) { |
| 434 | result = 0; |
| 435 | goto EXIT; |
| 436 | } |
| 437 | |
| 438 | switch (size) { |
| 439 | case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ |
| 440 | data->byte = inb_p(SMBHSTDAT0); |
| 441 | break; |
| 442 | case ALI1535_BYTE_DATA: |
| 443 | data->byte = inb_p(SMBHSTDAT0); |
| 444 | break; |
| 445 | case ALI1535_WORD_DATA: |
| 446 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); |
| 447 | break; |
| 448 | case ALI1535_BLOCK_DATA: |
| 449 | len = inb_p(SMBHSTDAT0); |
| 450 | if (len > 32) |
| 451 | len = 32; |
| 452 | data->block[0] = len; |
| 453 | /* Reset SMBBLKDAT */ |
| 454 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); |
| 455 | for (i = 1; i <= data->block[0]; i++) { |
| 456 | data->block[i] = inb_p(SMBBLKDAT); |
| 457 | dev_dbg(&adap->dev, "Blk: len=%d, i=%d, data=%02x\n", |
| 458 | len, i, data->block[i]); |
| 459 | } |
| 460 | break; |
| 461 | } |
| 462 | EXIT: |
| 463 | up(&i2c_ali1535_sem); |
| 464 | return result; |
| 465 | } |
| 466 | |
| 467 | |
| 468 | static u32 ali1535_func(struct i2c_adapter *adapter) |
| 469 | { |
| 470 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
| 471 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
| 472 | I2C_FUNC_SMBUS_BLOCK_DATA; |
| 473 | } |
| 474 | |
| 475 | static struct i2c_algorithm smbus_algorithm = { |
| 476 | .name = "Non-i2c SMBus adapter", |
| 477 | .id = I2C_ALGO_SMBUS, |
| 478 | .smbus_xfer = ali1535_access, |
| 479 | .functionality = ali1535_func, |
| 480 | }; |
| 481 | |
| 482 | static struct i2c_adapter ali1535_adapter = { |
| 483 | .owner = THIS_MODULE, |
| 484 | .class = I2C_CLASS_HWMON, |
| 485 | .algo = &smbus_algorithm, |
| 486 | .name = "unset", |
| 487 | }; |
| 488 | |
| 489 | static struct pci_device_id ali1535_ids[] = { |
| 490 | { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) }, |
| 491 | { }, |
| 492 | }; |
| 493 | |
| 494 | MODULE_DEVICE_TABLE (pci, ali1535_ids); |
| 495 | |
| 496 | static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| 497 | { |
| 498 | if (ali1535_setup(dev)) { |
| 499 | dev_warn(&dev->dev, |
| 500 | "ALI1535 not detected, module not inserted.\n"); |
| 501 | return -ENODEV; |
| 502 | } |
| 503 | |
| 504 | /* set up the driverfs linkage to our parent device */ |
| 505 | ali1535_adapter.dev.parent = &dev->dev; |
| 506 | |
| 507 | snprintf(ali1535_adapter.name, I2C_NAME_SIZE, |
| 508 | "SMBus ALI1535 adapter at %04x", ali1535_smba); |
| 509 | return i2c_add_adapter(&ali1535_adapter); |
| 510 | } |
| 511 | |
| 512 | static void __devexit ali1535_remove(struct pci_dev *dev) |
| 513 | { |
| 514 | i2c_del_adapter(&ali1535_adapter); |
| 515 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); |
| 516 | } |
| 517 | |
| 518 | static struct pci_driver ali1535_driver = { |
| 519 | .name = "ali1535_smbus", |
| 520 | .id_table = ali1535_ids, |
| 521 | .probe = ali1535_probe, |
| 522 | .remove = __devexit_p(ali1535_remove), |
| 523 | }; |
| 524 | |
| 525 | static int __init i2c_ali1535_init(void) |
| 526 | { |
| 527 | return pci_register_driver(&ali1535_driver); |
| 528 | } |
| 529 | |
| 530 | static void __exit i2c_ali1535_exit(void) |
| 531 | { |
| 532 | pci_unregister_driver(&ali1535_driver); |
| 533 | } |
| 534 | |
| 535 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " |
| 536 | "Philip Edelbrock <phil@netroedge.com>, " |
| 537 | "Mark D. Studebaker <mdsxyz123@yahoo.com> " |
| 538 | "and Dan Eaton <dan.eaton@rocketlogix.com>"); |
| 539 | MODULE_DESCRIPTION("ALI1535 SMBus driver"); |
| 540 | MODULE_LICENSE("GPL"); |
| 541 | |
| 542 | module_init(i2c_ali1535_init); |
| 543 | module_exit(i2c_ali1535_exit); |