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| 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/module.h> | |||
| 57 | #include <linux/pci.h> | |||
| 58 | #include <linux/kernel.h> | |||
| 59 | #include <linux/stddef.h> | |||
| 60 | #include <linux/sched.h> | |||
| 61 | #include <linux/delay.h> | |||
| 62 | #include <linux/ioport.h> | |||
| 63 | #include <linux/i2c.h> | |||
| 64 | #include <linux/init.h> | |||
| 65 | #include <asm/io.h> | |||
| 66 | #include <asm/semaphore.h> | |||
| 67 | ||||
| 68 | ||||
| 69 | /* ALI1535 SMBus address offsets */ | |||
| 70 | #define SMBHSTSTS (0 + ali1535_smba) | |||
| 71 | #define SMBHSTTYP (1 + ali1535_smba) | |||
| 72 | #define SMBHSTPORT (2 + ali1535_smba) | |||
| 73 | #define SMBHSTCMD (7 + ali1535_smba) | |||
| 74 | #define SMBHSTADD (3 + ali1535_smba) | |||
| 75 | #define SMBHSTDAT0 (4 + ali1535_smba) | |||
| 76 | #define SMBHSTDAT1 (5 + ali1535_smba) | |||
| 77 | #define SMBBLKDAT (6 + ali1535_smba) | |||
| 78 | ||||
| 79 | /* PCI Address Constants */ | |||
| 80 | #define SMBCOM 0x004 | |||
| 81 | #define SMBREV 0x008 | |||
| 82 | #define SMBCFG 0x0D1 | |||
| 83 | #define SMBBA 0x0E2 | |||
| 84 | #define SMBHSTCFG 0x0F0 | |||
| 85 | #define SMBCLK 0x0F2 | |||
| 86 | ||||
| 87 | /* Other settings */ | |||
| 88 | #define MAX_TIMEOUT 500 /* times 1/100 sec */ | |||
| 89 | #define ALI1535_SMB_IOSIZE 32 | |||
| 90 | ||||
| 91 | #define ALI1535_SMB_DEFAULTBASE 0x8040 | |||
| 92 | ||||
| 93 | /* ALI1535 address lock bits */ | |||
| 94 | #define ALI1535_LOCK 0x06 /* dwe */ | |||
| 95 | ||||
| 96 | /* ALI1535 command constants */ | |||
| 97 | #define ALI1535_QUICK 0x00 | |||
| 98 | #define ALI1535_BYTE 0x10 | |||
| 99 | #define ALI1535_BYTE_DATA 0x20 | |||
| 100 | #define ALI1535_WORD_DATA 0x30 | |||
| 101 | #define ALI1535_BLOCK_DATA 0x40 | |||
| 102 | #define ALI1535_I2C_READ 0x60 | |||
| 103 | ||||
| 104 | #define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ | |||
| 105 | /* I2C read */ | |||
| 106 | #define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ | |||
| 107 | #define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ | |||
| 108 | /* Alert-Response-Address */ | |||
| 109 | /* (read) */ | |||
| 110 | #define ALI1535_KILL 0x04 /* Kill Command (write) */ | |||
| 111 | #define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ | |||
| 112 | /* Alert-Response-Address */ | |||
| 113 | /* (read) */ | |||
| 114 | ||||
| 115 | #define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ | |||
| 116 | /* of 10-bit address in I2C */ | |||
| 117 | /* Read Command */ | |||
| 118 | ||||
| 119 | /* ALI1535 status register bits */ | |||
| 120 | #define ALI1535_STS_IDLE 0x04 | |||
| 121 | #define ALI1535_STS_BUSY 0x08 /* host busy */ | |||
| 122 | #define ALI1535_STS_DONE 0x10 /* transaction complete */ | |||
| 123 | #define ALI1535_STS_DEV 0x20 /* device error */ | |||
| 124 | #define ALI1535_STS_BUSERR 0x40 /* bus error */ | |||
| 125 | #define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ | |||
| 126 | #define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ | |||
| 127 | ||||
| 128 | #define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ | |||
| 129 | ||||
| 130 | /* ALI1535 device address register bits */ | |||
| 131 | #define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ | |||
| 132 | /* Address field */ | |||
| 133 | /* -> Write = 0 */ | |||
| 134 | /* -> Read = 1 */ | |||
| 135 | #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ | |||
| 136 | ||||
| 137 | static struct pci_driver ali1535_driver; | |||
| 138 | static unsigned short ali1535_smba; | |||
| 139 | static DECLARE_MUTEX(i2c_ali1535_sem); | |||
| 140 | ||||
| 141 | /* Detect whether a ALI1535 can be found, and initialize it, where necessary. | |||
| 142 | Note the differences between kernels with the old PCI BIOS interface and | |||
| 143 | newer kernels with the real PCI interface. In compat.h some things are | |||
| 144 | defined to make the transition easier. */ | |||
| 0 | 0 | - | 145 | static int ali1535_setup(struct pci_dev *dev) |
| 146 | { | |||
| 147 | int retval = -ENODEV; | |||
| 148 | unsigned char temp; | |||
| 149 | ||||
| 150 | /* Check the following things: | |||
| 151 | - SMB I/O address is initialized | |||
| 152 | - Device is enabled | |||
| 153 | - We can use the addresses | |||
| 154 | */ | |||
| 155 | ||||
| 156 | /* Determine the address of the SMBus area */ | |||
| 157 | pci_read_config_word(dev, SMBBA, &ali1535_smba); | |||
| 158 | ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); | |||
| 0 | 0 | - | 159 | if (ali1535_smba == 0) { |
| 160 | dev_warn(&dev->dev, | |||
| 0 | 0 | - | 160 | ternary-?: ( & dev -> dev ) -> driver |
| 161 | "ALI1535_smb region uninitialized - upgrade BIOS?\n"); | |||
| 0 | - | 162 | goto exit; | |
| 163 | } | |||
| 164 | ||||
| 0 | 0 | - | 165 | if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, |
| 166 | ali1535_driver.name)) { | |||
| 167 | dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n", | |||
| 0 | 0 | - | 167 | ternary-?: ( & dev -> dev ) -> driver |
| 168 | ali1535_smba); | |||
| 0 | - | 169 | goto exit; | |
| 170 | } | |||
| 171 | ||||
| 172 | /* check if whole device is enabled */ | |||
| 173 | pci_read_config_byte(dev, SMBCFG, &temp); | |||
| 0 | 0 | - | 174 | if ((temp & ALI1535_SMBIO_EN) == 0) { |
| 175 | dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); | |||
| 0 | 0 | - | 175 | ternary-?: ( & dev -> dev ) -> driver |
| 0 | - | 176 | goto exit_free; | |
| 177 | } | |||
| 178 | ||||
| 179 | /* Is SMB Host controller enabled? */ | |||
| 180 | pci_read_config_byte(dev, SMBHSTCFG, &temp); | |||
| 0 | 0 | - | 181 | if ((temp & 1) == 0) { |
| 182 | dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n"); | |||
| 0 | 0 | - | 182 | ternary-?: ( & dev -> dev ) -> driver |
| 0 | - | 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); | |||
| 0 | 0 | - | 197 | do-while (0) |
| 198 | dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba); | |||
| 0 | 0 | - | 198 | do-while (0) |
| 199 | ||||
| 200 | retval = 0; | |||
| 201 | exit: | |||
| 0 | - | 202 | return retval; | |
| 203 | ||||
| 204 | exit_free: | |||
| 205 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |||
| 0 | - | 206 | return retval; | |
| 207 | } | |||
| 208 | ||||
| 0 | 0 | - | 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, " | |||
| 0 | 0 | - | 215 | do-while (0) |
| 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 */ | |||
| 0 | 0 | - | 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, | |||
| 0 | 0 | - | 245 | ternary-?: ( & adap -> dev ) -> driver |
| 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 */ | |||
| 0 | 0 | - | 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)) & | |||
| 0 | 0 | - | 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, | |||
| 0 | 0 | - | 262 | ternary-?: ( & adap -> dev ) -> driver |
| 263 | "SMBus reset failed! (0x%02x) - controller or " | |||
| 264 | "device on bus is probably hung\n", temp); | |||
| 0 | - | 265 | return -1; | |
| 266 | } | |||
| 267 | } else { | |||
| 268 | /* check and clear done bit */ | |||
| 0 | 0 | - | 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)) | |||
| 0 | 0 | - | 283 | && (timeout++ < MAX_TIMEOUT)); |
| 0 | - | 283 | ((T) && !(F)) && (T) | |
| 0 | - | 283 | ((T) && !(T)) && (_) | |
| 0 | - | 283 | ((T) && !(F)) && (F) | |
| 0 | - | 283 | ((F) && !(_)) && (_) | |
| 284 | ||||
| 285 | /* If the SMBus is still busy, we give up */ | |||
| 0 | 0 | - | 286 | if (timeout >= MAX_TIMEOUT) { |
| 287 | result = -1; | |||
| 288 | dev_err(&adap->dev, "SMBus Timeout!\n"); | |||
| 0 | 0 | - | 288 | ternary-?: ( & adap -> dev ) -> driver |
| 289 | } | |||
| 290 | ||||
| 0 | 0 | - | 291 | if (temp & ALI1535_STS_FAIL) { |
| 292 | result = -1; | |||
| 293 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); | |||
| 0 | 0 | - | 293 | do-while (0) |
| 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 | */ | |||
| 0 | 0 | - | 300 | if (temp & ALI1535_STS_BUSERR) { |
| 301 | result = -1; | |||
| 302 | dev_dbg(&adap->dev, | |||
| 0 | 0 | - | 302 | do-while (0) |
| 303 | "Error: no response or bus collision ADD=%02x\n", | |||
| 304 | inb_p(SMBHSTADD)); | |||
| 305 | } | |||
| 306 | ||||
| 307 | /* haven't ever seen this */ | |||
| 0 | 0 | - | 308 | if (temp & ALI1535_STS_DEV) { |
| 309 | result = -1; | |||
| 310 | dev_err(&adap->dev, "Error: device error\n"); | |||
| 0 | 0 | - | 310 | ternary-?: ( & adap -> dev ) -> driver |
| 311 | } | |||
| 312 | ||||
| 313 | /* check to see if the "command complete" indication is set */ | |||
| 0 | 0 | - | 314 | if (!(temp & ALI1535_STS_DONE)) { |
| 315 | result = -1; | |||
| 316 | dev_err(&adap->dev, "Error: command never completed\n"); | |||
| 0 | 0 | - | 316 | ternary-?: ( & adap -> dev ) -> driver |
| 317 | } | |||
| 318 | ||||
| 319 | dev_dbg(&adap->dev, "Transaction (post): STS=%02x, TYP=%02x, " | |||
| 0 | 0 | - | 319 | do-while (0) |
| 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 */ | |||
| 0 | 0 | - | 325 | if (!(temp & ALI1535_STS_DONE)) { |
| 326 | /* issue "kill" to reset host controller */ | |||
| 327 | outb_p(ALI1535_KILL,SMBHSTTYP); | |||
| 328 | outb_p(0xFF,SMBHSTSTS); | |||
| 0 | 0 | - | 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 | ||||
| 0 | - | 335 | return result; | |
| 336 | } | |||
| 337 | ||||
| 338 | /* Return -1 on error. */ | |||
| 0 | 0 | - | 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; | |||
| 0 | 0 | - | 352 | (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); |
| 0 | - | 352 | (T) && !(F) | |
| 0 | - | 352 | (T) && !(T) | |
| 0 | - | 352 | (F) && !(_) | |
| 353 | timeout++) { | |||
| 354 | msleep(1); | |||
| 355 | temp = inb_p(SMBHSTSTS); | |||
| 356 | } | |||
| 0 | 0 | - | 357 | if (timeout >= MAX_TIMEOUT) |
| 358 | dev_warn(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp); | |||
| 0 | 0 | - | 358 | ternary-?: ( & adap -> dev ) -> driver |
| 359 | ||||
| 360 | /* clear status register (clear-on-write) */ | |||
| 361 | outb_p(0xFF, SMBHSTSTS); | |||
| 362 | ||||
| 363 | switch (size) { | |||
| 0 | - | 364 | case I2C_SMBUS_PROC_CALL: | |
| 365 | dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n"); | |||
| 0 | 0 | - | 365 | ternary-?: ( & adap -> dev ) -> driver |
| 366 | result = -1; | |||
| 0 | - | 367 | goto EXIT; | |
| 0 | - | 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 */ | |||
| 0 | - | 373 | break; | |
| 0 | - | 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 */ | |||
| 0 | 0 | - | 379 | if (read_write == I2C_SMBUS_WRITE) |
| 380 | outb_p(command, SMBHSTCMD); | |||
| 0 | - | 381 | break; | |
| 0 | - | 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); | |||
| 0 | 0 | - | 388 | if (read_write == I2C_SMBUS_WRITE) |
| 389 | outb_p(data->byte, SMBHSTDAT0); | |||
| 0 | - | 390 | break; | |
| 0 | - | 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); | |||
| 0 | 0 | - | 397 | if (read_write == I2C_SMBUS_WRITE) { |
| 398 | outb_p(data->word & 0xff, SMBHSTDAT0); | |||
| 399 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); | |||
| 400 | } | |||
| 0 | - | 401 | break; | |
| 0 | - | 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); | |||
| 0 | 0 | - | 408 | if (read_write == I2C_SMBUS_WRITE) { |
| 409 | len = data->block[0]; | |||
| 0 | 0 | - | 410 | if (len < 0) { |
| 411 | len = 0; | |||
| 412 | data->block[0] = len; | |||
| 413 | } | |||
| 0 | 0 | - | 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); | |||
| 0 | 0 | - | 421 | for (i = 1; i <= len; i++) |
| 422 | outb_p(data->block[i], SMBBLKDAT); | |||
| 423 | } | |||
| 0 | - | 424 | break; | |
| 425 | } | |||
| 426 | ||||
| 0 | 0 | - | 427 | if (ali1535_transaction(adap)) { |
| 428 | /* Error in transaction */ | |||
| 429 | result = -1; | |||
| 0 | - | 430 | goto EXIT; | |
| 431 | } | |||
| 432 | ||||
| 0 | 0 | - | 433 | if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) { |
| 0 | - | 433 | (T) || (_) | |
| 0 | - | 433 | (F) || (T) | |
| 0 | - | 433 | (F) || (F) | |
| 434 | result = 0; | |||
| 0 | - | 435 | goto EXIT; | |
| 436 | } | |||
| 437 | ||||
| 438 | switch (size) { | |||
| 0 | - | 439 | case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ | |
| 440 | data->byte = inb_p(SMBHSTDAT0); | |||
| 0 | - | 441 | break; | |
| 0 | - | 442 | case ALI1535_BYTE_DATA: | |
| 443 | data->byte = inb_p(SMBHSTDAT0); | |||
| 0 | - | 444 | break; | |
| 0 | - | 445 | case ALI1535_WORD_DATA: | |
| 446 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); | |||
| 0 | - | 447 | break; | |
| 0 | - | 448 | case ALI1535_BLOCK_DATA: | |
| 449 | len = inb_p(SMBHSTDAT0); | |||
| 0 | 0 | - | 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); | |||
| 0 | 0 | - | 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", | |||
| 0 | 0 | - | 457 | do-while (0) |
| 458 | len, i, data->block[i]); | |||
| 459 | } | |||
| 0 | - | 460 | break; | |
| 461 | } | |||
| 462 | EXIT: | |||
| 463 | up(&i2c_ali1535_sem); | |||
| 0 | - | 464 | return result; | |
| 465 | } | |||
| 466 | ||||
| 467 | ||||
| 0 | 0 | - | 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 | | |||
| 0 | - | 472 | I2C_FUNC_SMBUS_BLOCK_DATA; | |
| 473 | } | |||
| 474 | ||||
| 475 | static struct i2c_algorithm smbus_algorithm = { | |||
| 476 | .smbus_xfer = ali1535_access, | |||
| 477 | .functionality = ali1535_func, | |||
| 478 | }; | |||
| 479 | ||||
| 480 | static struct i2c_adapter ali1535_adapter = { | |||
| 481 | .owner = THIS_MODULE, | |||
| 482 | .class = I2C_CLASS_HWMON, | |||