| 1 | /* |
|---|
| 2 | piix4.c - Part of lm_sensors, Linux kernel modules for hardware |
|---|
| 3 | monitoring |
|---|
| 4 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl> and |
|---|
| 5 | Philip Edelbrock <phil@netroedge.com> |
|---|
| 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 | /* |
|---|
| 23 | Supports: |
|---|
| 24 | Intel PIIX4, 440MX |
|---|
| 25 | Serverworks OSB4, CSB5 |
|---|
| 26 | SMSC Victory66 |
|---|
| 27 | |
|---|
| 28 | Note: we assume there can only be one device, with one SMBus interface. |
|---|
| 29 | */ |
|---|
| 30 | |
|---|
| 31 | #include <linux/version.h> |
|---|
| 32 | #include <linux/module.h> |
|---|
| 33 | #include <linux/config.h> |
|---|
| 34 | #include <linux/pci.h> |
|---|
| 35 | #include <linux/kernel.h> |
|---|
| 36 | #include <linux/stddef.h> |
|---|
| 37 | #include <linux/sched.h> |
|---|
| 38 | #include <linux/ioport.h> |
|---|
| 39 | #include <linux/i2c.h> |
|---|
| 40 | #include <linux/init.h> |
|---|
| 41 | #include <linux/apm_bios.h> |
|---|
| 42 | #include <asm/io.h> |
|---|
| 43 | #include "version.h" |
|---|
| 44 | #include "dmi_scan.h" |
|---|
| 45 | |
|---|
| 46 | |
|---|
| 47 | struct sd { |
|---|
| 48 | const unsigned short mfr; |
|---|
| 49 | const unsigned short dev; |
|---|
| 50 | const unsigned char fn; |
|---|
| 51 | const char *name; |
|---|
| 52 | }; |
|---|
| 53 | |
|---|
| 54 | /* Note: We assume all devices are identical |
|---|
| 55 | to the Intel PIIX4; we only mention it during detection. */ |
|---|
| 56 | |
|---|
| 57 | static struct sd supported[] = { |
|---|
| 58 | {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3, 3, "PIIX4"}, |
|---|
| 59 | {PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4, 0, "OSB4"}, |
|---|
| 60 | {PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5, 0, "CSB5"}, |
|---|
| 61 | {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_3, 3, "440MX"}, |
|---|
| 62 | {PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_3, 0, "Victory66"}, |
|---|
| 63 | {0, 0, 0, NULL} |
|---|
| 64 | }; |
|---|
| 65 | |
|---|
| 66 | /* PIIX4 SMBus address offsets */ |
|---|
| 67 | #define SMBHSTSTS (0 + piix4_smba) |
|---|
| 68 | #define SMBHSLVSTS (1 + piix4_smba) |
|---|
| 69 | #define SMBHSTCNT (2 + piix4_smba) |
|---|
| 70 | #define SMBHSTCMD (3 + piix4_smba) |
|---|
| 71 | #define SMBHSTADD (4 + piix4_smba) |
|---|
| 72 | #define SMBHSTDAT0 (5 + piix4_smba) |
|---|
| 73 | #define SMBHSTDAT1 (6 + piix4_smba) |
|---|
| 74 | #define SMBBLKDAT (7 + piix4_smba) |
|---|
| 75 | #define SMBSLVCNT (8 + piix4_smba) |
|---|
| 76 | #define SMBSHDWCMD (9 + piix4_smba) |
|---|
| 77 | #define SMBSLVEVT (0xA + piix4_smba) |
|---|
| 78 | #define SMBSLVDAT (0xC + piix4_smba) |
|---|
| 79 | |
|---|
| 80 | /* PCI Address Constants */ |
|---|
| 81 | #define SMBBA 0x090 |
|---|
| 82 | #define SMBHSTCFG 0x0D2 |
|---|
| 83 | #define SMBSLVC 0x0D3 |
|---|
| 84 | #define SMBSHDW1 0x0D4 |
|---|
| 85 | #define SMBSHDW2 0x0D5 |
|---|
| 86 | #define SMBREV 0x0D6 |
|---|
| 87 | |
|---|
| 88 | /* Other settings */ |
|---|
| 89 | #define MAX_TIMEOUT 500 |
|---|
| 90 | #define ENABLE_INT9 0 |
|---|
| 91 | |
|---|
| 92 | /* PIIX4 constants */ |
|---|
| 93 | #define PIIX4_QUICK 0x00 |
|---|
| 94 | #define PIIX4_BYTE 0x04 |
|---|
| 95 | #define PIIX4_BYTE_DATA 0x08 |
|---|
| 96 | #define PIIX4_WORD_DATA 0x0C |
|---|
| 97 | #define PIIX4_BLOCK_DATA 0x14 |
|---|
| 98 | |
|---|
| 99 | /* insmod parameters */ |
|---|
| 100 | |
|---|
| 101 | /* If force is set to anything different from 0, we forcibly enable the |
|---|
| 102 | PIIX4. DANGEROUS! */ |
|---|
| 103 | static int force = 0; |
|---|
| 104 | MODULE_PARM(force, "i"); |
|---|
| 105 | MODULE_PARM_DESC(force, "Forcibly enable the PIIX4. DANGEROUS!"); |
|---|
| 106 | |
|---|
| 107 | /* If force_addr is set to anything different from 0, we forcibly enable |
|---|
| 108 | the PIIX4 at the given address. VERY DANGEROUS! */ |
|---|
| 109 | static int force_addr = 0; |
|---|
| 110 | MODULE_PARM(force_addr, "i"); |
|---|
| 111 | MODULE_PARM_DESC(force_addr, |
|---|
| 112 | "Forcibly enable the PIIX4 at the given address. " |
|---|
| 113 | "EXTREMELY DANGEROUS!"); |
|---|
| 114 | |
|---|
| 115 | static void piix4_do_pause(unsigned int amount); |
|---|
| 116 | static int piix4_transaction(void); |
|---|
| 117 | |
|---|
| 118 | |
|---|
| 119 | static unsigned short piix4_smba = 0; |
|---|
| 120 | |
|---|
| 121 | #ifdef CONFIG_X86 |
|---|
| 122 | /* |
|---|
| 123 | * Get DMI information. |
|---|
| 124 | */ |
|---|
| 125 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,34) |
|---|
| 126 | void dmi_scan_mach(void); |
|---|
| 127 | #endif |
|---|
| 128 | |
|---|
| 129 | static int __init ibm_dmi_probe(void) |
|---|
| 130 | { |
|---|
| 131 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,34) |
|---|
| 132 | extern int is_unsafe_smbus; |
|---|
| 133 | return is_unsafe_smbus; |
|---|
| 134 | #else |
|---|
| 135 | #define IBM_SIGNATURE "IBM" |
|---|
| 136 | dmi_scan_mach(); |
|---|
| 137 | if(dmi_ident[DMI_SYS_VENDOR] == NULL) |
|---|
| 138 | return 0; |
|---|
| 139 | if(strncmp(dmi_ident[DMI_SYS_VENDOR], IBM_SIGNATURE, |
|---|
| 140 | strlen(IBM_SIGNATURE)) == 0) |
|---|
| 141 | return 1; |
|---|
| 142 | return 0; |
|---|
| 143 | #endif |
|---|
| 144 | } |
|---|
| 145 | #endif |
|---|
| 146 | |
|---|
| 147 | /* Detect whether a PIIX4 can be found, and initialize it, where necessary. |
|---|
| 148 | Note the differences between kernels with the old PCI BIOS interface and |
|---|
| 149 | newer kernels with the real PCI interface. In compat.h some things are |
|---|
| 150 | defined to make the transition easier. */ |
|---|
| 151 | int piix4_setup(void) |
|---|
| 152 | { |
|---|
| 153 | int error_return = 0; |
|---|
| 154 | unsigned char temp; |
|---|
| 155 | struct sd *num = supported; |
|---|
| 156 | struct pci_dev *PIIX4_dev = NULL; |
|---|
| 157 | |
|---|
| 158 | if (pci_present() == 0) { |
|---|
| 159 | error_return = -ENODEV; |
|---|
| 160 | goto END; |
|---|
| 161 | } |
|---|
| 162 | |
|---|
| 163 | /* Look for a supported device/function */ |
|---|
| 164 | do { |
|---|
| 165 | if((PIIX4_dev = pci_find_device(num->mfr, num->dev, |
|---|
| 166 | PIIX4_dev))) { |
|---|
| 167 | if(PCI_FUNC(PIIX4_dev->devfn) != num->fn) |
|---|
| 168 | continue; |
|---|
| 169 | break; |
|---|
| 170 | } |
|---|
| 171 | PIIX4_dev = NULL; |
|---|
| 172 | num++; |
|---|
| 173 | } while (num->mfr); |
|---|
| 174 | |
|---|
| 175 | if (PIIX4_dev == NULL) { |
|---|
| 176 | printk |
|---|
| 177 | (KERN_ERR "i2c-piix4.o: Error: Can't detect PIIX4 or compatible device!\n"); |
|---|
| 178 | error_return = -ENODEV; |
|---|
| 179 | goto END; |
|---|
| 180 | } |
|---|
| 181 | printk(KERN_INFO "i2c-piix4.o: Found %s device\n", num->name); |
|---|
| 182 | |
|---|
| 183 | #ifdef CONFIG_X86 |
|---|
| 184 | if(ibm_dmi_probe()) { |
|---|
| 185 | printk |
|---|
| 186 | (KERN_ERR "i2c-piix4.o: IBM Laptop detected; this module may corrupt\n"); |
|---|
| 187 | printk |
|---|
| 188 | (KERN_ERR " your serial eeprom! Refusing to load module!\n"); |
|---|
| 189 | error_return = -EPERM; |
|---|
| 190 | goto END; |
|---|
| 191 | } |
|---|
| 192 | #endif |
|---|
| 193 | |
|---|
| 194 | /* Determine the address of the SMBus areas */ |
|---|
| 195 | if (force_addr) { |
|---|
| 196 | piix4_smba = force_addr & 0xfff0; |
|---|
| 197 | force = 0; |
|---|
| 198 | } else { |
|---|
| 199 | pci_read_config_word(PIIX4_dev, SMBBA, &piix4_smba); |
|---|
| 200 | piix4_smba &= 0xfff0; |
|---|
| 201 | if(piix4_smba == 0) { |
|---|
| 202 | printk(KERN_ERR "i2c-piix4.o: SMB base address uninitialized - upgrade BIOS or use force_addr=0xaddr\n"); |
|---|
| 203 | return -ENODEV; |
|---|
| 204 | } |
|---|
| 205 | } |
|---|
| 206 | |
|---|
| 207 | if (check_region(piix4_smba, 8)) { |
|---|
| 208 | printk |
|---|
| 209 | (KERN_ERR "i2c-piix4.o: SMB region 0x%x already in use!\n", |
|---|
| 210 | piix4_smba); |
|---|
| 211 | error_return = -ENODEV; |
|---|
| 212 | goto END; |
|---|
| 213 | } |
|---|
| 214 | |
|---|
| 215 | pci_read_config_byte(PIIX4_dev, SMBHSTCFG, &temp); |
|---|
| 216 | /* If force_addr is set, we program the new address here. Just to make |
|---|
| 217 | sure, we disable the PIIX4 first. */ |
|---|
| 218 | if (force_addr) { |
|---|
| 219 | pci_write_config_byte(PIIX4_dev, SMBHSTCFG, temp & 0xfe); |
|---|
| 220 | pci_write_config_word(PIIX4_dev, SMBBA, piix4_smba); |
|---|
| 221 | pci_write_config_byte(PIIX4_dev, SMBHSTCFG, temp | 0x01); |
|---|
| 222 | printk |
|---|
| 223 | (KERN_INFO "i2c-piix4.o: WARNING: SMBus interface set to new " |
|---|
| 224 | "address %04x!\n", piix4_smba); |
|---|
| 225 | } else if ((temp & 1) == 0) { |
|---|
| 226 | if (force) { |
|---|
| 227 | /* This should never need to be done, but has been noted that |
|---|
| 228 | many Dell machines have the SMBus interface on the PIIX4 |
|---|
| 229 | disabled!? NOTE: This assumes I/O space and other allocations WERE |
|---|
| 230 | done by the Bios! Don't complain if your hardware does weird |
|---|
| 231 | things after enabling this. :') Check for Bios updates before |
|---|
| 232 | resorting to this. */ |
|---|
| 233 | pci_write_config_byte(PIIX4_dev, SMBHSTCFG, |
|---|
| 234 | temp | 1); |
|---|
| 235 | printk |
|---|
| 236 | (KERN_NOTICE "i2c-piix4.o: WARNING: SMBus interface has been FORCEFULLY " |
|---|
| 237 | "ENABLED!\n"); |
|---|
| 238 | } else { |
|---|
| 239 | printk |
|---|
| 240 | (KERN_ERR "i2c-piix4.o: Host SMBus controller not enabled!\n"); |
|---|
| 241 | error_return = -ENODEV; |
|---|
| 242 | goto END; |
|---|
| 243 | } |
|---|
| 244 | } |
|---|
| 245 | |
|---|
| 246 | /* Everything is happy, let's grab the memory and set things up. */ |
|---|
| 247 | request_region(piix4_smba, 8, "piix4-smbus"); |
|---|
| 248 | |
|---|
| 249 | #ifdef DEBUG |
|---|
| 250 | if ((temp & 0x0E) == 8) |
|---|
| 251 | printk |
|---|
| 252 | (KERN_DEBUG "i2c-piix4.o: Using Interrupt 9 for SMBus.\n"); |
|---|
| 253 | else if ((temp & 0x0E) == 0) |
|---|
| 254 | printk |
|---|
| 255 | (KERN_DEBUG "i2c-piix4.o: Using Interrupt SMI# for SMBus.\n"); |
|---|
| 256 | else |
|---|
| 257 | printk |
|---|
| 258 | (KERN_ERR "i2c-piix4.o: Illegal Interrupt configuration (or code out " |
|---|
| 259 | "of date)!\n"); |
|---|
| 260 | |
|---|
| 261 | pci_read_config_byte(PIIX4_dev, SMBREV, &temp); |
|---|
| 262 | printk(KERN_DEBUG "i2c-piix4.o: SMBREV = 0x%X\n", temp); |
|---|
| 263 | printk(KERN_DEBUG "i2c-piix4.o: SMBA = 0x%X\n", piix4_smba); |
|---|
| 264 | #endif /* DEBUG */ |
|---|
| 265 | |
|---|
| 266 | END: |
|---|
| 267 | return error_return; |
|---|
| 268 | } |
|---|
| 269 | |
|---|
| 270 | |
|---|
| 271 | /* Internally used pause function */ |
|---|
| 272 | void piix4_do_pause(unsigned int amount) |
|---|
| 273 | { |
|---|
| 274 | current->state = TASK_INTERRUPTIBLE; |
|---|
| 275 | schedule_timeout(amount); |
|---|
| 276 | } |
|---|
| 277 | |
|---|
| 278 | /* Another internally used function */ |
|---|
| 279 | int piix4_transaction(void) |
|---|
| 280 | { |
|---|
| 281 | int temp; |
|---|
| 282 | int result = 0; |
|---|
| 283 | int timeout = 0; |
|---|
| 284 | |
|---|
| 285 | #ifdef DEBUG |
|---|
| 286 | printk |
|---|
| 287 | (KERN_DEBUG "i2c-piix4.o: Transaction (pre): CNT=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, " |
|---|
| 288 | "DAT1=%02x\n", inb_p(SMBHSTCNT), inb_p(SMBHSTCMD), |
|---|
| 289 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); |
|---|
| 290 | #endif |
|---|
| 291 | |
|---|
| 292 | /* Make sure the SMBus host is ready to start transmitting */ |
|---|
| 293 | if ((temp = inb_p(SMBHSTSTS)) != 0x00) { |
|---|
| 294 | #ifdef DEBUG |
|---|
| 295 | printk(KERN_DEBUG "i2c-piix4.o: SMBus busy (%02x). Resetting... \n", |
|---|
| 296 | temp); |
|---|
| 297 | #endif |
|---|
| 298 | outb_p(temp, SMBHSTSTS); |
|---|
| 299 | if ((temp = inb_p(SMBHSTSTS)) != 0x00) { |
|---|
| 300 | #ifdef DEBUG |
|---|
| 301 | printk(KERN_ERR "i2c-piix4.o: Failed! (%02x)\n", temp); |
|---|
| 302 | #endif |
|---|
| 303 | return -1; |
|---|
| 304 | } else { |
|---|
| 305 | #ifdef DEBUG |
|---|
| 306 | printk(KERN_DEBUG "i2c-piix4.o: Successfull!\n"); |
|---|
| 307 | #endif |
|---|
| 308 | } |
|---|
| 309 | } |
|---|
| 310 | |
|---|
| 311 | /* start the transaction by setting bit 6 */ |
|---|
| 312 | outb_p(inb(SMBHSTCNT) | 0x040, SMBHSTCNT); |
|---|
| 313 | |
|---|
| 314 | /* We will always wait for a fraction of a second! (See PIIX4 docs errata) */ |
|---|
| 315 | do { |
|---|
| 316 | piix4_do_pause(1); |
|---|
| 317 | temp = inb_p(SMBHSTSTS); |
|---|
| 318 | } while ((temp & 0x01) && (timeout++ < MAX_TIMEOUT)); |
|---|
| 319 | |
|---|
| 320 | #ifdef DEBUG |
|---|
| 321 | /* If the SMBus is still busy, we give up */ |
|---|
| 322 | if (timeout >= MAX_TIMEOUT) { |
|---|
| 323 | printk(KERN_ERR "i2c-piix4.o: SMBus Timeout!\n"); |
|---|
| 324 | result = -1; |
|---|
| 325 | } |
|---|
| 326 | #endif |
|---|
| 327 | |
|---|
| 328 | if (temp & 0x10) { |
|---|
| 329 | result = -1; |
|---|
| 330 | #ifdef DEBUG |
|---|
| 331 | printk(KERN_ERR "i2c-piix4.o: Error: Failed bus transaction\n"); |
|---|
| 332 | #endif |
|---|
| 333 | } |
|---|
| 334 | |
|---|
| 335 | if (temp & 0x08) { |
|---|
| 336 | result = -1; |
|---|
| 337 | printk |
|---|
| 338 | (KERN_ERR "i2c-piix4.o: Bus collision! SMBus may be locked until next hard\n" |
|---|
| 339 | "reset. (sorry!)\n"); |
|---|
| 340 | /* Clock stops and slave is stuck in mid-transmission */ |
|---|
| 341 | } |
|---|
| 342 | |
|---|
| 343 | if (temp & 0x04) { |
|---|
| 344 | result = -1; |
|---|
| 345 | #ifdef DEBUG |
|---|
| 346 | printk(KERN_ERR "i2c-piix4.o: Error: no response!\n"); |
|---|
| 347 | #endif |
|---|
| 348 | } |
|---|
| 349 | |
|---|
| 350 | if (inb_p(SMBHSTSTS) != 0x00) |
|---|
| 351 | outb_p(inb(SMBHSTSTS), SMBHSTSTS); |
|---|
| 352 | |
|---|
| 353 | #ifdef DEBUG |
|---|
| 354 | if ((temp = inb_p(SMBHSTSTS)) != 0x00) { |
|---|
| 355 | printk |
|---|
| 356 | (KERN_ERR "i2c-piix4.o: Failed reset at end of transaction (%02x)\n", |
|---|
| 357 | temp); |
|---|
| 358 | } |
|---|
| 359 | printk |
|---|
| 360 | (KERN_DEBUG "i2c-piix4.o: Transaction (post): CNT=%02x, CMD=%02x, ADD=%02x, " |
|---|
| 361 | "DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT), inb_p(SMBHSTCMD), |
|---|
| 362 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); |
|---|
| 363 | #endif |
|---|
| 364 | return result; |
|---|
| 365 | } |
|---|
| 366 | |
|---|
| 367 | /* Return -1 on error. */ |
|---|
| 368 | s32 piix4_access(struct i2c_adapter * adap, u16 addr, |
|---|
| 369 | unsigned short flags, char read_write, |
|---|
| 370 | u8 command, int size, union i2c_smbus_data * data) |
|---|
| 371 | { |
|---|
| 372 | int i, len; |
|---|
| 373 | |
|---|
| 374 | switch (size) { |
|---|
| 375 | case I2C_SMBUS_PROC_CALL: |
|---|
| 376 | printk |
|---|
| 377 | (KERN_ERR "i2c-piix4.o: I2C_SMBUS_PROC_CALL not supported!\n"); |
|---|
| 378 | return -1; |
|---|
| 379 | case I2C_SMBUS_QUICK: |
|---|
| 380 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
|---|
| 381 | SMBHSTADD); |
|---|
| 382 | size = PIIX4_QUICK; |
|---|
| 383 | break; |
|---|
| 384 | case I2C_SMBUS_BYTE: |
|---|
| 385 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
|---|
| 386 | SMBHSTADD); |
|---|
| 387 | if (read_write == I2C_SMBUS_WRITE) |
|---|
| 388 | outb_p(command, SMBHSTCMD); |
|---|
| 389 | size = PIIX4_BYTE; |
|---|
| 390 | break; |
|---|
| 391 | case I2C_SMBUS_BYTE_DATA: |
|---|
| 392 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
|---|
| 393 | SMBHSTADD); |
|---|
| 394 | outb_p(command, SMBHSTCMD); |
|---|
| 395 | if (read_write == I2C_SMBUS_WRITE) |
|---|
| 396 | outb_p(data->byte, SMBHSTDAT0); |
|---|
| 397 | size = PIIX4_BYTE_DATA; |
|---|
| 398 | break; |
|---|
| 399 | case I2C_SMBUS_WORD_DATA: |
|---|
| 400 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
|---|
| 401 | SMBHSTADD); |
|---|
| 402 | outb_p(command, SMBHSTCMD); |
|---|
| 403 | if (read_write == I2C_SMBUS_WRITE) { |
|---|
| 404 | outb_p(data->word & 0xff, SMBHSTDAT0); |
|---|
| 405 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
|---|
| 406 | } |
|---|
| 407 | size = PIIX4_WORD_DATA; |
|---|
| 408 | break; |
|---|
| 409 | case I2C_SMBUS_BLOCK_DATA: |
|---|
| 410 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
|---|
| 411 | SMBHSTADD); |
|---|
| 412 | outb_p(command, SMBHSTCMD); |
|---|
| 413 | if (read_write == I2C_SMBUS_WRITE) { |
|---|
| 414 | len = data->block[0]; |
|---|
| 415 | if (len < 0) |
|---|
| 416 | len = 0; |
|---|
| 417 | if (len > 32) |
|---|
| 418 | len = 32; |
|---|
| 419 | outb_p(len, SMBHSTDAT0); |
|---|
| 420 | i = inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */ |
|---|
| 421 | for (i = 1; i <= len; i++) |
|---|
| 422 | outb_p(data->block[i], SMBBLKDAT); |
|---|
| 423 | } |
|---|
| 424 | size = PIIX4_BLOCK_DATA; |
|---|
| 425 | break; |
|---|
| 426 | } |
|---|
| 427 | |
|---|
| 428 | outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT); |
|---|
| 429 | |
|---|
| 430 | if (piix4_transaction()) /* Error in transaction */ |
|---|
| 431 | return -1; |
|---|
| 432 | |
|---|
| 433 | if ((read_write == I2C_SMBUS_WRITE) || (size == PIIX4_QUICK)) |
|---|
| 434 | return 0; |
|---|
| 435 | |
|---|
| 436 | |
|---|
| 437 | switch (size) { |
|---|
| 438 | case PIIX4_BYTE: /* Where is the result put? I assume here it is in |
|---|
| 439 | SMBHSTDAT0 but it might just as well be in the |
|---|
| 440 | SMBHSTCMD. No clue in the docs */ |
|---|
| 441 | |
|---|
| 442 | data->byte = inb_p(SMBHSTDAT0); |
|---|
| 443 | break; |
|---|
| 444 | case PIIX4_BYTE_DATA: |
|---|
| 445 | data->byte = inb_p(SMBHSTDAT0); |
|---|
| 446 | break; |
|---|
| 447 | case PIIX4_WORD_DATA: |
|---|
| 448 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); |
|---|
| 449 | break; |
|---|
| 450 | case PIIX4_BLOCK_DATA: |
|---|
| 451 | data->block[0] = inb_p(SMBHSTDAT0); |
|---|
| 452 | i = inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */ |
|---|
| 453 | for (i = 1; i <= data->block[0]; i++) |
|---|
| 454 | data->block[i] = inb_p(SMBBLKDAT); |
|---|
| 455 | break; |
|---|
| 456 | } |
|---|
| 457 | return 0; |
|---|
| 458 | } |
|---|
| 459 | |
|---|
| 460 | |
|---|
| 461 | u32 piix4_func(struct i2c_adapter *adapter) |
|---|
| 462 | { |
|---|
| 463 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
|---|
| 464 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
|---|
| 465 | I2C_FUNC_SMBUS_BLOCK_DATA; |
|---|
| 466 | } |
|---|
| 467 | |
|---|
| 468 | static struct i2c_algorithm smbus_algorithm = { |
|---|
| 469 | .name = "Non-I2C SMBus adapter", |
|---|
| 470 | .id = I2C_ALGO_SMBUS, |
|---|
| 471 | .smbus_xfer = piix4_access, |
|---|
| 472 | .functionality = piix4_func, |
|---|
| 473 | }; |
|---|
| 474 | |
|---|
| 475 | static struct i2c_adapter piix4_adapter = { |
|---|
| 476 | .owner = THIS_MODULE, |
|---|
| 477 | .name = "unset", |
|---|
| 478 | .id = I2C_ALGO_SMBUS | I2C_HW_SMBUS_PIIX4, |
|---|
| 479 | .algo = &smbus_algorithm, |
|---|
| 480 | }; |
|---|
| 481 | |
|---|
| 482 | |
|---|
| 483 | |
|---|
| 484 | static struct pci_device_id piix4_ids[] __devinitdata = { |
|---|
| 485 | { 0, } |
|---|
| 486 | }; |
|---|
| 487 | |
|---|
| 488 | static int __devinit piix4_probe(struct pci_dev *dev, const struct pci_device_id *id) |
|---|
| 489 | { |
|---|
| 490 | |
|---|
| 491 | sprintf(piix4_adapter.name, "SMBus PIIX4 adapter at %04x", |
|---|
| 492 | piix4_smba); |
|---|
| 493 | |
|---|
| 494 | i2c_add_adapter(&piix4_adapter); |
|---|
| 495 | } |
|---|
| 496 | |
|---|
| 497 | static void __devexit piix4_remove(struct pci_dev *dev) |
|---|
| 498 | { |
|---|
| 499 | i2c_del_adapter(&piix4_adapter); |
|---|
| 500 | } |
|---|
| 501 | |
|---|
| 502 | |
|---|
| 503 | static struct pci_driver piix4_driver = { |
|---|
| 504 | .name = "piix4 smbus", |
|---|
| 505 | .id_table = piix4_ids, |
|---|
| 506 | .probe = piix4_probe, |
|---|
| 507 | .remove = __devexit_p(piix4_remove), |
|---|
| 508 | }; |
|---|
| 509 | |
|---|
| 510 | static int __init i2c_piix4_init(void) |
|---|
| 511 | { |
|---|
| 512 | printk("i2c-piix4.o version %s (%s)\n", LM_VERSION, LM_DATE); |
|---|
| 513 | return pci_module_init(&piix4_driver); |
|---|
| 514 | } |
|---|
| 515 | |
|---|
| 516 | |
|---|
| 517 | static void __exit i2c_piix4_exit(void) |
|---|
| 518 | { |
|---|
| 519 | pci_unregister_driver(&piix4_driver); |
|---|
| 520 | release_region(piix4_smba, 8); |
|---|
| 521 | } |
|---|
| 522 | |
|---|
| 523 | |
|---|
| 524 | |
|---|
| 525 | MODULE_AUTHOR |
|---|
| 526 | ("Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock <phil@netroedge.com>"); |
|---|
| 527 | MODULE_DESCRIPTION("PIIX4 SMBus driver"); |
|---|
| 528 | MODULE_LICENSE("GPL"); |
|---|
| 529 | |
|---|
| 530 | module_init(i2c_piix4_init); |
|---|
| 531 | module_exit(i2c_piix4_exit); |
|---|