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) 2002,2003 Alexander Malysh <amalysh@web.de> |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | Changes: |
| 21 | 24.08.2002 |
| 22 | Fixed the typo in sis630_access (Thanks to Mark M. Hoffman) |
| 23 | Changed sis630_transaction.(Thanks to Mark M. Hoffman) |
| 24 | 18.09.2002 |
| 25 | Added SIS730 as supported. |
| 26 | 21.09.2002 |
| 27 | Added high_clock module option.If this option is set |
| 28 | used Host Master Clock 56KHz (default 14KHz).For now we save old Host |
| 29 | Master Clock and after transaction completed restore (otherwise |
| 30 | it's confuse BIOS and hung Machine). |
| 31 | 24.09.2002 |
| 32 | Fixed typo in sis630_access |
| 33 | Fixed logical error by restoring of Host Master Clock |
| 34 | 31.07.2003 |
| 35 | Added block data read/write support. |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | Status: beta |
| 40 | |
| 41 | Supports: |
| 42 | SIS 630 |
| 43 | SIS 730 |
| 44 | |
| 45 | Note: we assume there can only be one device, with one SMBus interface. |
| 46 | */ |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/kernel.h> |
| 49 | #include <linux/module.h> |
| 50 | #include <linux/delay.h> |
| 51 | #include <linux/pci.h> |
| 52 | #include <linux/ioport.h> |
| 53 | #include <linux/init.h> |
| 54 | #include <linux/i2c.h> |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 55 | #include <linux/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include <asm/io.h> |
| 57 | |
| 58 | /* SIS630 SMBus registers */ |
| 59 | #define SMB_STS 0x80 /* status */ |
| 60 | #define SMB_EN 0x81 /* status enable */ |
| 61 | #define SMB_CNT 0x82 |
| 62 | #define SMBHOST_CNT 0x83 |
| 63 | #define SMB_ADDR 0x84 |
| 64 | #define SMB_CMD 0x85 |
| 65 | #define SMB_PCOUNT 0x86 /* processed count */ |
| 66 | #define SMB_COUNT 0x87 |
| 67 | #define SMB_BYTE 0x88 /* ~0x8F data byte field */ |
| 68 | #define SMBDEV_ADDR 0x90 |
| 69 | #define SMB_DB0 0x91 |
| 70 | #define SMB_DB1 0x92 |
| 71 | #define SMB_SAA 0x93 |
| 72 | |
| 73 | /* register count for request_region */ |
| 74 | #define SIS630_SMB_IOREGION 20 |
| 75 | |
| 76 | /* PCI address constants */ |
| 77 | /* acpi base address register */ |
| 78 | #define SIS630_ACPI_BASE_REG 0x74 |
| 79 | /* bios control register */ |
| 80 | #define SIS630_BIOS_CTL_REG 0x40 |
| 81 | |
| 82 | /* Other settings */ |
| 83 | #define MAX_TIMEOUT 500 |
| 84 | |
| 85 | /* SIS630 constants */ |
| 86 | #define SIS630_QUICK 0x00 |
| 87 | #define SIS630_BYTE 0x01 |
| 88 | #define SIS630_BYTE_DATA 0x02 |
| 89 | #define SIS630_WORD_DATA 0x03 |
| 90 | #define SIS630_PCALL 0x04 |
| 91 | #define SIS630_BLOCK_DATA 0x05 |
| 92 | |
Jean Delvare | d6072f8 | 2005-09-25 16:37:04 +0200 | [diff] [blame] | 93 | static struct pci_driver sis630_driver; |
| 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | /* insmod parameters */ |
| 96 | static int high_clock; |
| 97 | static int force; |
| 98 | module_param(high_clock, bool, 0); |
| 99 | MODULE_PARM_DESC(high_clock, "Set Host Master Clock to 56KHz (default 14KHz)."); |
| 100 | module_param(force, bool, 0); |
| 101 | MODULE_PARM_DESC(force, "Forcibly enable the SIS630. DANGEROUS!"); |
| 102 | |
| 103 | /* acpi base address */ |
Jean Delvare | 6050709 | 2005-09-25 16:23:07 +0200 | [diff] [blame] | 104 | static unsigned short acpi_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
| 106 | /* supported chips */ |
| 107 | static int supported[] = { |
| 108 | PCI_DEVICE_ID_SI_630, |
| 109 | PCI_DEVICE_ID_SI_730, |
| 110 | 0 /* terminates the list */ |
| 111 | }; |
| 112 | |
| 113 | static inline u8 sis630_read(u8 reg) |
| 114 | { |
| 115 | return inb(acpi_base + reg); |
| 116 | } |
| 117 | |
| 118 | static inline void sis630_write(u8 reg, u8 data) |
| 119 | { |
| 120 | outb(data, acpi_base + reg); |
| 121 | } |
| 122 | |
| 123 | static int sis630_transaction_start(struct i2c_adapter *adap, int size, u8 *oldclock) |
| 124 | { |
| 125 | int temp; |
| 126 | |
| 127 | /* Make sure the SMBus host is ready to start transmitting. */ |
| 128 | if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) { |
| 129 | dev_dbg(&adap->dev, "SMBus busy (%02x).Resetting...\n",temp); |
| 130 | /* kill smbus transaction */ |
| 131 | sis630_write(SMBHOST_CNT, 0x20); |
| 132 | |
| 133 | if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) { |
| 134 | dev_dbg(&adap->dev, "Failed! (%02x)\n", temp); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 135 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } else { |
Jean Delvare | c5d21b7 | 2008-04-29 23:11:37 +0200 | [diff] [blame] | 137 | dev_dbg(&adap->dev, "Successful!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | } |
| 139 | } |
| 140 | |
| 141 | /* save old clock, so we can prevent machine for hung */ |
| 142 | *oldclock = sis630_read(SMB_CNT); |
| 143 | |
| 144 | dev_dbg(&adap->dev, "saved clock 0x%02x\n", *oldclock); |
| 145 | |
| 146 | /* disable timeout interrupt , set Host Master Clock to 56KHz if requested */ |
| 147 | if (high_clock) |
| 148 | sis630_write(SMB_CNT, 0x20); |
| 149 | else |
| 150 | sis630_write(SMB_CNT, (*oldclock & ~0x40)); |
| 151 | |
| 152 | /* clear all sticky bits */ |
| 153 | temp = sis630_read(SMB_STS); |
| 154 | sis630_write(SMB_STS, temp & 0x1e); |
| 155 | |
| 156 | /* start the transaction by setting bit 4 and size */ |
| 157 | sis630_write(SMBHOST_CNT,0x10 | (size & 0x07)); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static int sis630_transaction_wait(struct i2c_adapter *adap, int size) |
| 163 | { |
| 164 | int temp, result = 0, timeout = 0; |
| 165 | |
| 166 | /* We will always wait for a fraction of a second! */ |
| 167 | do { |
| 168 | msleep(1); |
| 169 | temp = sis630_read(SMB_STS); |
| 170 | /* check if block transmitted */ |
| 171 | if (size == SIS630_BLOCK_DATA && (temp & 0x10)) |
| 172 | break; |
| 173 | } while (!(temp & 0x0e) && (timeout++ < MAX_TIMEOUT)); |
| 174 | |
| 175 | /* If the SMBus is still busy, we give up */ |
Roel Kluin | 4ccc28f | 2009-05-05 08:39:24 +0200 | [diff] [blame] | 176 | if (timeout > MAX_TIMEOUT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | dev_dbg(&adap->dev, "SMBus Timeout!\n"); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 178 | result = -ETIMEDOUT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | if (temp & 0x02) { |
| 182 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 183 | result = -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | if (temp & 0x04) { |
| 187 | dev_err(&adap->dev, "Bus collision!\n"); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 188 | result = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* |
| 190 | TBD: Datasheet say: |
| 191 | the software should clear this bit and restart SMBUS operation. |
| 192 | Should we do it or user start request again? |
| 193 | */ |
| 194 | } |
| 195 | |
| 196 | return result; |
| 197 | } |
| 198 | |
| 199 | static void sis630_transaction_end(struct i2c_adapter *adap, u8 oldclock) |
| 200 | { |
| 201 | int temp = 0; |
| 202 | |
| 203 | /* clear all status "sticky" bits */ |
| 204 | sis630_write(SMB_STS, temp); |
| 205 | |
| 206 | dev_dbg(&adap->dev, "SMB_CNT before clock restore 0x%02x\n", sis630_read(SMB_CNT)); |
| 207 | |
| 208 | /* |
| 209 | * restore old Host Master Clock if high_clock is set |
| 210 | * and oldclock was not 56KHz |
| 211 | */ |
| 212 | if (high_clock && !(oldclock & 0x20)) |
| 213 | sis630_write(SMB_CNT,(sis630_read(SMB_CNT) & ~0x20)); |
| 214 | |
| 215 | dev_dbg(&adap->dev, "SMB_CNT after clock restore 0x%02x\n", sis630_read(SMB_CNT)); |
| 216 | } |
| 217 | |
| 218 | static int sis630_transaction(struct i2c_adapter *adap, int size) |
| 219 | { |
| 220 | int result = 0; |
| 221 | u8 oldclock = 0; |
| 222 | |
| 223 | result = sis630_transaction_start(adap, size, &oldclock); |
| 224 | if (!result) { |
| 225 | result = sis630_transaction_wait(adap, size); |
| 226 | sis630_transaction_end(adap, oldclock); |
| 227 | } |
| 228 | |
| 229 | return result; |
| 230 | } |
| 231 | |
| 232 | static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *data, int read_write) |
| 233 | { |
| 234 | int i, len = 0, rc = 0; |
| 235 | u8 oldclock = 0; |
| 236 | |
| 237 | if (read_write == I2C_SMBUS_WRITE) { |
| 238 | len = data->block[0]; |
| 239 | if (len < 0) |
| 240 | len = 0; |
| 241 | else if (len > 32) |
| 242 | len = 32; |
| 243 | sis630_write(SMB_COUNT, len); |
| 244 | for (i=1; i <= len; i++) { |
| 245 | dev_dbg(&adap->dev, "set data 0x%02x\n", data->block[i]); |
| 246 | /* set data */ |
| 247 | sis630_write(SMB_BYTE+(i-1)%8, data->block[i]); |
| 248 | if (i==8 || (len<8 && i==len)) { |
| 249 | dev_dbg(&adap->dev, "start trans len=%d i=%d\n",len ,i); |
| 250 | /* first transaction */ |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 251 | rc = sis630_transaction_start(adap, |
| 252 | SIS630_BLOCK_DATA, &oldclock); |
| 253 | if (rc) |
| 254 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | } |
| 256 | else if ((i-1)%8 == 7 || i==len) { |
| 257 | dev_dbg(&adap->dev, "trans_wait len=%d i=%d\n",len,i); |
| 258 | if (i>8) { |
| 259 | dev_dbg(&adap->dev, "clear smbary_sts len=%d i=%d\n",len,i); |
| 260 | /* |
| 261 | If this is not first transaction, |
| 262 | we must clear sticky bit. |
| 263 | clear SMBARY_STS |
| 264 | */ |
| 265 | sis630_write(SMB_STS,0x10); |
| 266 | } |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 267 | rc = sis630_transaction_wait(adap, |
| 268 | SIS630_BLOCK_DATA); |
| 269 | if (rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | dev_dbg(&adap->dev, "trans_wait failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | break; |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | } |
| 276 | else { |
| 277 | /* read request */ |
| 278 | data->block[0] = len = 0; |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 279 | rc = sis630_transaction_start(adap, |
| 280 | SIS630_BLOCK_DATA, &oldclock); |
| 281 | if (rc) |
| 282 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | do { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 284 | rc = sis630_transaction_wait(adap, SIS630_BLOCK_DATA); |
| 285 | if (rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | dev_dbg(&adap->dev, "trans_wait failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | break; |
| 288 | } |
| 289 | /* if this first transaction then read byte count */ |
| 290 | if (len == 0) |
| 291 | data->block[0] = sis630_read(SMB_COUNT); |
| 292 | |
| 293 | /* just to be sure */ |
| 294 | if (data->block[0] > 32) |
| 295 | data->block[0] = 32; |
| 296 | |
| 297 | dev_dbg(&adap->dev, "block data read len=0x%x\n", data->block[0]); |
| 298 | |
| 299 | for (i=0; i < 8 && len < data->block[0]; i++,len++) { |
| 300 | dev_dbg(&adap->dev, "read i=%d len=%d\n", i, len); |
| 301 | data->block[len+1] = sis630_read(SMB_BYTE+i); |
| 302 | } |
| 303 | |
| 304 | dev_dbg(&adap->dev, "clear smbary_sts len=%d i=%d\n",len,i); |
| 305 | |
| 306 | /* clear SMBARY_STS */ |
| 307 | sis630_write(SMB_STS,0x10); |
| 308 | } while(len < data->block[0]); |
| 309 | } |
| 310 | |
| 311 | sis630_transaction_end(adap, oldclock); |
| 312 | |
| 313 | return rc; |
| 314 | } |
| 315 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 316 | /* Return negative errno on error. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | static s32 sis630_access(struct i2c_adapter *adap, u16 addr, |
| 318 | unsigned short flags, char read_write, |
| 319 | u8 command, int size, union i2c_smbus_data *data) |
| 320 | { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 321 | int status; |
| 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | switch (size) { |
| 324 | case I2C_SMBUS_QUICK: |
| 325 | sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); |
| 326 | size = SIS630_QUICK; |
| 327 | break; |
| 328 | case I2C_SMBUS_BYTE: |
| 329 | sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); |
| 330 | if (read_write == I2C_SMBUS_WRITE) |
| 331 | sis630_write(SMB_CMD, command); |
| 332 | size = SIS630_BYTE; |
| 333 | break; |
| 334 | case I2C_SMBUS_BYTE_DATA: |
| 335 | sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); |
| 336 | sis630_write(SMB_CMD, command); |
| 337 | if (read_write == I2C_SMBUS_WRITE) |
| 338 | sis630_write(SMB_BYTE, data->byte); |
| 339 | size = SIS630_BYTE_DATA; |
| 340 | break; |
| 341 | case I2C_SMBUS_PROC_CALL: |
| 342 | case I2C_SMBUS_WORD_DATA: |
| 343 | sis630_write(SMB_ADDR,((addr & 0x7f) << 1) | (read_write & 0x01)); |
| 344 | sis630_write(SMB_CMD, command); |
| 345 | if (read_write == I2C_SMBUS_WRITE) { |
| 346 | sis630_write(SMB_BYTE, data->word & 0xff); |
| 347 | sis630_write(SMB_BYTE + 1,(data->word & 0xff00) >> 8); |
| 348 | } |
| 349 | size = (size == I2C_SMBUS_PROC_CALL ? SIS630_PCALL : SIS630_WORD_DATA); |
| 350 | break; |
| 351 | case I2C_SMBUS_BLOCK_DATA: |
| 352 | sis630_write(SMB_ADDR,((addr & 0x7f) << 1) | (read_write & 0x01)); |
| 353 | sis630_write(SMB_CMD, command); |
| 354 | size = SIS630_BLOCK_DATA; |
| 355 | return sis630_block_data(adap, data, read_write); |
| 356 | default: |
Jean Delvare | ac7fc4f | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 357 | dev_warn(&adap->dev, "Unsupported transaction %d\n", |
| 358 | size); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 359 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 362 | status = sis630_transaction(adap, size); |
| 363 | if (status) |
| 364 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
| 366 | if ((size != SIS630_PCALL) && |
| 367 | ((read_write == I2C_SMBUS_WRITE) || (size == SIS630_QUICK))) { |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | switch(size) { |
| 372 | case SIS630_BYTE: |
| 373 | case SIS630_BYTE_DATA: |
| 374 | data->byte = sis630_read(SMB_BYTE); |
| 375 | break; |
| 376 | case SIS630_PCALL: |
| 377 | case SIS630_WORD_DATA: |
| 378 | data->word = sis630_read(SMB_BYTE) + (sis630_read(SMB_BYTE + 1) << 8); |
| 379 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | static u32 sis630_func(struct i2c_adapter *adapter) |
| 386 | { |
| 387 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA | |
| 388 | I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_PROC_CALL | |
| 389 | I2C_FUNC_SMBUS_BLOCK_DATA; |
| 390 | } |
| 391 | |
| 392 | static int sis630_setup(struct pci_dev *sis630_dev) |
| 393 | { |
| 394 | unsigned char b; |
| 395 | struct pci_dev *dummy = NULL; |
| 396 | int retval = -ENODEV, i; |
| 397 | |
| 398 | /* check for supported SiS devices */ |
| 399 | for (i=0; supported[i] > 0 ; i++) { |
| 400 | if ((dummy = pci_get_device(PCI_VENDOR_ID_SI, supported[i], dummy))) |
| 401 | break; /* found */ |
| 402 | } |
| 403 | |
| 404 | if (dummy) { |
| 405 | pci_dev_put(dummy); |
| 406 | } |
| 407 | else if (force) { |
| 408 | dev_err(&sis630_dev->dev, "WARNING: Can't detect SIS630 compatible device, but " |
| 409 | "loading because of force option enabled\n"); |
| 410 | } |
| 411 | else { |
| 412 | return -ENODEV; |
| 413 | } |
| 414 | |
| 415 | /* |
| 416 | Enable ACPI first , so we can accsess reg 74-75 |
| 417 | in acpi io space and read acpi base addr |
| 418 | */ |
| 419 | if (pci_read_config_byte(sis630_dev, SIS630_BIOS_CTL_REG,&b)) { |
| 420 | dev_err(&sis630_dev->dev, "Error: Can't read bios ctl reg\n"); |
| 421 | goto exit; |
| 422 | } |
| 423 | /* if ACPI already enabled , do nothing */ |
| 424 | if (!(b & 0x80) && |
| 425 | pci_write_config_byte(sis630_dev, SIS630_BIOS_CTL_REG, b | 0x80)) { |
| 426 | dev_err(&sis630_dev->dev, "Error: Can't enable ACPI\n"); |
| 427 | goto exit; |
| 428 | } |
| 429 | |
| 430 | /* Determine the ACPI base address */ |
| 431 | if (pci_read_config_word(sis630_dev,SIS630_ACPI_BASE_REG,&acpi_base)) { |
| 432 | dev_err(&sis630_dev->dev, "Error: Can't determine ACPI base address\n"); |
| 433 | goto exit; |
| 434 | } |
| 435 | |
| 436 | dev_dbg(&sis630_dev->dev, "ACPI base at 0x%04x\n", acpi_base); |
| 437 | |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 438 | retval = acpi_check_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION, |
| 439 | sis630_driver.name); |
| 440 | if (retval) |
| 441 | goto exit; |
| 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /* Everything is happy, let's grab the memory and set things up. */ |
Jean Delvare | d6072f8 | 2005-09-25 16:37:04 +0200 | [diff] [blame] | 444 | if (!request_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION, |
| 445 | sis630_driver.name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | dev_err(&sis630_dev->dev, "SMBus registers 0x%04x-0x%04x already " |
| 447 | "in use!\n", acpi_base + SMB_STS, acpi_base + SMB_SAA); |
| 448 | goto exit; |
| 449 | } |
| 450 | |
| 451 | retval = 0; |
| 452 | |
| 453 | exit: |
| 454 | if (retval) |
| 455 | acpi_base = 0; |
| 456 | return retval; |
| 457 | } |
| 458 | |
| 459 | |
Jean Delvare | 8f9082c | 2006-09-03 22:39:46 +0200 | [diff] [blame] | 460 | static const struct i2c_algorithm smbus_algorithm = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | .smbus_xfer = sis630_access, |
| 462 | .functionality = sis630_func, |
| 463 | }; |
| 464 | |
| 465 | static struct i2c_adapter sis630_adapter = { |
| 466 | .owner = THIS_MODULE, |
Jean Delvare | 3401b2f | 2008-07-14 22:38:29 +0200 | [diff] [blame] | 467 | .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | .algo = &smbus_algorithm, |
| 469 | }; |
| 470 | |
| 471 | static struct pci_device_id sis630_ids[] __devinitdata = { |
| 472 | { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, |
| 473 | { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC) }, |
| 474 | { 0, } |
| 475 | }; |
| 476 | |
| 477 | MODULE_DEVICE_TABLE (pci, sis630_ids); |
| 478 | |
| 479 | static int __devinit sis630_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| 480 | { |
| 481 | if (sis630_setup(dev)) { |
| 482 | dev_err(&dev->dev, "SIS630 comp. bus not detected, module not inserted.\n"); |
| 483 | return -ENODEV; |
| 484 | } |
| 485 | |
Robert P. J. Day | 405ae7d | 2007-02-17 19:13:42 +0100 | [diff] [blame] | 486 | /* set up the sysfs linkage to our parent device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | sis630_adapter.dev.parent = &dev->dev; |
| 488 | |
Jean Delvare | 66c7acf | 2009-01-07 14:29:18 +0100 | [diff] [blame] | 489 | snprintf(sis630_adapter.name, sizeof(sis630_adapter.name), |
| 490 | "SMBus SIS630 adapter at %04x", acpi_base + SMB_STS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | return i2c_add_adapter(&sis630_adapter); |
| 493 | } |
| 494 | |
| 495 | static void __devexit sis630_remove(struct pci_dev *dev) |
| 496 | { |
| 497 | if (acpi_base) { |
| 498 | i2c_del_adapter(&sis630_adapter); |
| 499 | release_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION); |
| 500 | acpi_base = 0; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | |
| 505 | static struct pci_driver sis630_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | .name = "sis630_smbus", |
| 507 | .id_table = sis630_ids, |
| 508 | .probe = sis630_probe, |
| 509 | .remove = __devexit_p(sis630_remove), |
| 510 | }; |
| 511 | |
| 512 | static int __init i2c_sis630_init(void) |
| 513 | { |
| 514 | return pci_register_driver(&sis630_driver); |
| 515 | } |
| 516 | |
| 517 | |
| 518 | static void __exit i2c_sis630_exit(void) |
| 519 | { |
| 520 | pci_unregister_driver(&sis630_driver); |
| 521 | } |
| 522 | |
| 523 | |
| 524 | MODULE_LICENSE("GPL"); |
| 525 | MODULE_AUTHOR("Alexander Malysh <amalysh@web.de>"); |
| 526 | MODULE_DESCRIPTION("SIS630 SMBus driver"); |
| 527 | |
| 528 | module_init(i2c_sis630_init); |
| 529 | module_exit(i2c_sis630_exit); |