Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 2 | Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>, |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 3 | Philip Edelbrock <phil@netroedge.com>, Kyösti Mälkki <kmalkki@cc.hut.fi>, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | Mark D. Studebaker <mdsxyz123@yahoo.com> |
Jean Delvare | 0d227a7 | 2008-01-27 18:14:51 +0100 | [diff] [blame] | 5 | Copyright (C) 2005 - 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 | aaf7f14 | 2005-09-22 22:09:07 +0200 | [diff] [blame] | 23 | Supports the following VIA south bridges: |
| 24 | |
| 25 | Chip name PCI ID REV I2C block |
| 26 | VT82C596A 0x3050 no |
| 27 | VT82C596B 0x3051 no |
| 28 | VT82C686A 0x3057 0x30 no |
| 29 | VT82C686B 0x3057 0x40 yes |
| 30 | VT8231 0x8235 no? |
| 31 | VT8233 0x3074 yes |
| 32 | VT8233A 0x3147 yes? |
| 33 | VT8235 0x3177 yes |
| 34 | VT8237R 0x3227 yes |
Rudolf Marek | c243353 | 2006-09-03 22:35:21 +0200 | [diff] [blame] | 35 | VT8237A 0x3337 yes |
Jean Delvare | 0d227a7 | 2008-01-27 18:14:51 +0100 | [diff] [blame] | 36 | VT8237S 0x3372 yes |
Rudolf Marek | c243353 | 2006-09-03 22:35:21 +0200 | [diff] [blame] | 37 | VT8251 0x3287 yes |
Jean Delvare | ab6a6ed | 2007-02-13 22:09:02 +0100 | [diff] [blame] | 38 | CX700 0x8324 yes |
Rudolf Marek | b806a71 | 2008-10-14 17:30:03 +0200 | [diff] [blame] | 39 | VX800/VX820 0x8353 yes |
Harald Welte | a231591 | 2009-06-15 18:01:49 +0200 | [diff] [blame] | 40 | VX855/VX875 0x8409 yes |
Jean Delvare | aaf7f14 | 2005-09-22 22:09:07 +0200 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | Note: we assume there can only be one device, with one SMBus interface. |
| 43 | */ |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/module.h> |
| 46 | #include <linux/delay.h> |
| 47 | #include <linux/pci.h> |
| 48 | #include <linux/kernel.h> |
| 49 | #include <linux/stddef.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/ioport.h> |
| 51 | #include <linux/i2c.h> |
| 52 | #include <linux/init.h> |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 53 | #include <linux/acpi.h> |
H Hartley Sweeten | 2178218 | 2010-05-21 18:41:01 +0200 | [diff] [blame] | 54 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | static struct pci_dev *vt596_pdev; |
| 57 | |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 58 | #define SMBBA1 0x90 |
| 59 | #define SMBBA2 0x80 |
| 60 | #define SMBBA3 0xD0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | /* SMBus address offsets */ |
| 63 | static unsigned short vt596_smba; |
| 64 | #define SMBHSTSTS (vt596_smba + 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #define SMBHSTCNT (vt596_smba + 2) |
| 66 | #define SMBHSTCMD (vt596_smba + 3) |
| 67 | #define SMBHSTADD (vt596_smba + 4) |
| 68 | #define SMBHSTDAT0 (vt596_smba + 5) |
| 69 | #define SMBHSTDAT1 (vt596_smba + 6) |
| 70 | #define SMBBLKDAT (vt596_smba + 7) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | /* PCI Address Constants */ |
| 73 | |
| 74 | /* SMBus data in configuration space can be found in two places, |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 75 | We try to select the better one */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 77 | static unsigned short SMBHSTCFG = 0xD2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* Other settings */ |
| 80 | #define MAX_TIMEOUT 500 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | /* VT82C596 constants */ |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 83 | #define VT596_QUICK 0x00 |
| 84 | #define VT596_BYTE 0x04 |
| 85 | #define VT596_BYTE_DATA 0x08 |
| 86 | #define VT596_WORD_DATA 0x0C |
Prakash Mortha | a05f2c5 | 2008-10-14 17:30:06 +0200 | [diff] [blame] | 87 | #define VT596_PROC_CALL 0x10 |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 88 | #define VT596_BLOCK_DATA 0x14 |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 89 | #define VT596_I2C_BLOCK_DATA 0x34 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | |
| 92 | /* If force is set to anything different from 0, we forcibly enable the |
| 93 | VT596. DANGEROUS! */ |
| 94 | static int force; |
| 95 | module_param(force, bool, 0); |
| 96 | MODULE_PARM_DESC(force, "Forcibly enable the SMBus. DANGEROUS!"); |
| 97 | |
| 98 | /* If force_addr is set to anything different from 0, we forcibly enable |
| 99 | the VT596 at the given address. VERY DANGEROUS! */ |
| 100 | static u16 force_addr; |
| 101 | module_param(force_addr, ushort, 0); |
| 102 | MODULE_PARM_DESC(force_addr, |
| 103 | "Forcibly enable the SMBus at the given address. " |
| 104 | "EXTREMELY DANGEROUS!"); |
| 105 | |
| 106 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 107 | static struct pci_driver vt596_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | static struct i2c_adapter vt596_adapter; |
| 109 | |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 110 | #define FEATURE_I2CBLOCK (1<<0) |
| 111 | static unsigned int vt596_features; |
| 112 | |
Jean Delvare | ed5453e | 2005-09-22 22:23:32 +0200 | [diff] [blame] | 113 | #ifdef DEBUG |
| 114 | static void vt596_dump_regs(const char *msg, u8 size) |
| 115 | { |
| 116 | dev_dbg(&vt596_adapter.dev, "%s: STS=%02x CNT=%02x CMD=%02x ADD=%02x " |
| 117 | "DAT=%02x,%02x\n", msg, inb_p(SMBHSTSTS), inb_p(SMBHSTCNT), |
| 118 | inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), |
| 119 | inb_p(SMBHSTDAT1)); |
| 120 | |
| 121 | if (size == VT596_BLOCK_DATA |
| 122 | || size == VT596_I2C_BLOCK_DATA) { |
| 123 | int i; |
| 124 | |
| 125 | dev_dbg(&vt596_adapter.dev, "BLK="); |
| 126 | for (i = 0; i < I2C_SMBUS_BLOCK_MAX / 2; i++) |
| 127 | printk("%02x,", inb_p(SMBBLKDAT)); |
| 128 | printk("\n"); |
| 129 | dev_dbg(&vt596_adapter.dev, " "); |
| 130 | for (; i < I2C_SMBUS_BLOCK_MAX - 1; i++) |
| 131 | printk("%02x,", inb_p(SMBBLKDAT)); |
| 132 | printk("%02x\n", inb_p(SMBBLKDAT)); |
| 133 | } |
| 134 | } |
Greg KH | ca68f11 | 2005-09-22 22:23:32 +0200 | [diff] [blame] | 135 | #else |
| 136 | static inline void vt596_dump_regs(const char *msg, u8 size) { } |
Jean Delvare | ed5453e | 2005-09-22 22:23:32 +0200 | [diff] [blame] | 137 | #endif |
| 138 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 139 | /* Return -1 on error, 0 on success */ |
Jean Delvare | 50c1cc3 | 2005-09-22 22:15:53 +0200 | [diff] [blame] | 140 | static int vt596_transaction(u8 size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
| 142 | int temp; |
| 143 | int result = 0; |
| 144 | int timeout = 0; |
| 145 | |
Jean Delvare | ed5453e | 2005-09-22 22:23:32 +0200 | [diff] [blame] | 146 | vt596_dump_regs("Transaction (pre)", size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | /* Make sure the SMBus host is ready to start transmitting */ |
| 149 | if ((temp = inb_p(SMBHSTSTS)) & 0x1F) { |
| 150 | dev_dbg(&vt596_adapter.dev, "SMBus busy (0x%02x). " |
Jean Delvare | 8750197 | 2005-10-31 18:51:21 +0100 | [diff] [blame] | 151 | "Resetting...\n", temp); |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | outb_p(temp, SMBHSTSTS); |
| 154 | if ((temp = inb_p(SMBHSTSTS)) & 0x1F) { |
Jean Delvare | 8750197 | 2005-10-31 18:51:21 +0100 | [diff] [blame] | 155 | dev_err(&vt596_adapter.dev, "SMBus reset failed! " |
| 156 | "(0x%02x)\n", temp); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 157 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 161 | /* Start the transaction by setting bit 6 */ |
Jean Delvare | 8750197 | 2005-10-31 18:51:21 +0100 | [diff] [blame] | 162 | outb_p(0x40 | size, SMBHSTCNT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 164 | /* We will always wait for a fraction of a second */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | do { |
| 166 | msleep(1); |
| 167 | temp = inb_p(SMBHSTSTS); |
Roel Kluin | b6a3195 | 2010-01-16 20:43:12 +0100 | [diff] [blame] | 168 | } while ((temp & 0x01) && (++timeout < MAX_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* If the SMBus is still busy, we give up */ |
Roel Kluin | b6a3195 | 2010-01-16 20:43:12 +0100 | [diff] [blame] | 171 | if (timeout == MAX_TIMEOUT) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 172 | result = -ETIMEDOUT; |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 173 | dev_err(&vt596_adapter.dev, "SMBus timeout!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | if (temp & 0x10) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 177 | result = -EIO; |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 178 | dev_err(&vt596_adapter.dev, "Transaction failed (0x%02x)\n", |
Jean Delvare | 8750197 | 2005-10-31 18:51:21 +0100 | [diff] [blame] | 179 | size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | if (temp & 0x08) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 183 | result = -EIO; |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 184 | dev_err(&vt596_adapter.dev, "SMBus collision!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | if (temp & 0x04) { |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 188 | result = -ENXIO; |
Jean Delvare | bf5d95c | 2010-10-24 18:16:59 +0200 | [diff] [blame] | 189 | dev_dbg(&vt596_adapter.dev, "No response\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 192 | /* Resetting status register */ |
| 193 | if (temp & 0x1F) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | outb_p(temp, SMBHSTSTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Jean Delvare | ed5453e | 2005-09-22 22:23:32 +0200 | [diff] [blame] | 196 | vt596_dump_regs("Transaction (post)", size); |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | return result; |
| 199 | } |
| 200 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 201 | /* Return negative errno on error, 0 on success */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | static s32 vt596_access(struct i2c_adapter *adap, u16 addr, |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 203 | unsigned short flags, char read_write, u8 command, |
| 204 | int size, union i2c_smbus_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | { |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 206 | int i; |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 207 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | switch (size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | case I2C_SMBUS_QUICK: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | size = VT596_QUICK; |
| 212 | break; |
| 213 | case I2C_SMBUS_BYTE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | if (read_write == I2C_SMBUS_WRITE) |
| 215 | outb_p(command, SMBHSTCMD); |
| 216 | size = VT596_BYTE; |
| 217 | break; |
| 218 | case I2C_SMBUS_BYTE_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | outb_p(command, SMBHSTCMD); |
| 220 | if (read_write == I2C_SMBUS_WRITE) |
| 221 | outb_p(data->byte, SMBHSTDAT0); |
| 222 | size = VT596_BYTE_DATA; |
| 223 | break; |
| 224 | case I2C_SMBUS_WORD_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | outb_p(command, SMBHSTCMD); |
| 226 | if (read_write == I2C_SMBUS_WRITE) { |
| 227 | outb_p(data->word & 0xff, SMBHSTDAT0); |
| 228 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
| 229 | } |
| 230 | size = VT596_WORD_DATA; |
| 231 | break; |
Prakash Mortha | a05f2c5 | 2008-10-14 17:30:06 +0200 | [diff] [blame] | 232 | case I2C_SMBUS_PROC_CALL: |
| 233 | outb_p(command, SMBHSTCMD); |
| 234 | outb_p(data->word & 0xff, SMBHSTDAT0); |
| 235 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
| 236 | size = VT596_PROC_CALL; |
| 237 | break; |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 238 | case I2C_SMBUS_I2C_BLOCK_DATA: |
| 239 | if (!(vt596_features & FEATURE_I2CBLOCK)) |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 240 | goto exit_unsupported; |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 241 | if (read_write == I2C_SMBUS_READ) |
Jean Delvare | 4b2643d | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 242 | outb_p(data->block[0], SMBHSTDAT0); |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 243 | /* Fall through */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | case I2C_SMBUS_BLOCK_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | outb_p(command, SMBHSTCMD); |
| 246 | if (read_write == I2C_SMBUS_WRITE) { |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 247 | u8 len = data->block[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (len > I2C_SMBUS_BLOCK_MAX) |
| 249 | len = I2C_SMBUS_BLOCK_MAX; |
| 250 | outb_p(len, SMBHSTDAT0); |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 251 | inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | for (i = 1; i <= len; i++) |
| 253 | outb_p(data->block[i], SMBBLKDAT); |
| 254 | } |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 255 | size = (size == I2C_SMBUS_I2C_BLOCK_DATA) ? |
| 256 | VT596_I2C_BLOCK_DATA : VT596_BLOCK_DATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | break; |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 258 | default: |
| 259 | goto exit_unsupported; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 262 | outb_p(((addr & 0x7f) << 1) | read_write, SMBHSTADD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 264 | status = vt596_transaction(size); |
| 265 | if (status) |
| 266 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Prakash Mortha | a05f2c5 | 2008-10-14 17:30:06 +0200 | [diff] [blame] | 268 | if (size == VT596_PROC_CALL) |
| 269 | read_write = I2C_SMBUS_READ; |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK)) |
| 272 | return 0; |
| 273 | |
| 274 | switch (size) { |
| 275 | case VT596_BYTE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | case VT596_BYTE_DATA: |
| 277 | data->byte = inb_p(SMBHSTDAT0); |
| 278 | break; |
| 279 | case VT596_WORD_DATA: |
Prakash Mortha | a05f2c5 | 2008-10-14 17:30:06 +0200 | [diff] [blame] | 280 | case VT596_PROC_CALL: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); |
| 282 | break; |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 283 | case VT596_I2C_BLOCK_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | case VT596_BLOCK_DATA: |
| 285 | data->block[0] = inb_p(SMBHSTDAT0); |
| 286 | if (data->block[0] > I2C_SMBUS_BLOCK_MAX) |
| 287 | data->block[0] = I2C_SMBUS_BLOCK_MAX; |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 288 | inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | for (i = 1; i <= data->block[0]; i++) |
| 290 | data->block[i] = inb_p(SMBBLKDAT); |
| 291 | break; |
| 292 | } |
| 293 | return 0; |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 294 | |
| 295 | exit_unsupported: |
Jean Delvare | ac7fc4f | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 296 | dev_warn(&vt596_adapter.dev, "Unsupported transaction %d\n", |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 297 | size); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 298 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | static u32 vt596_func(struct i2c_adapter *adapter) |
| 302 | { |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 303 | u32 func = I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
Prakash Mortha | a05f2c5 | 2008-10-14 17:30:06 +0200 | [diff] [blame] | 305 | I2C_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_DATA; |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 306 | |
| 307 | if (vt596_features & FEATURE_I2CBLOCK) |
| 308 | func |= I2C_FUNC_SMBUS_I2C_BLOCK; |
| 309 | return func; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Jean Delvare | 8f9082c | 2006-09-03 22:39:46 +0200 | [diff] [blame] | 312 | static const struct i2c_algorithm smbus_algorithm = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | .smbus_xfer = vt596_access, |
| 314 | .functionality = vt596_func, |
| 315 | }; |
| 316 | |
| 317 | static struct i2c_adapter vt596_adapter = { |
| 318 | .owner = THIS_MODULE, |
Jean Delvare | 3401b2f | 2008-07-14 22:38:29 +0200 | [diff] [blame] | 319 | .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | .algo = &smbus_algorithm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | }; |
| 322 | |
| 323 | static int __devinit vt596_probe(struct pci_dev *pdev, |
| 324 | const struct pci_device_id *id) |
| 325 | { |
| 326 | unsigned char temp; |
Jean Delvare | 7c1f59c | 2012-01-12 20:32:03 +0100 | [diff] [blame] | 327 | int error; |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | /* Determine the address of the SMBus areas */ |
| 330 | if (force_addr) { |
| 331 | vt596_smba = force_addr & 0xfff0; |
| 332 | force = 0; |
| 333 | goto found; |
| 334 | } |
| 335 | |
| 336 | if ((pci_read_config_word(pdev, id->driver_data, &vt596_smba)) || |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 337 | !(vt596_smba & 0x0001)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | /* try 2nd address and config reg. for 596 */ |
| 339 | if (id->device == PCI_DEVICE_ID_VIA_82C596_3 && |
| 340 | !pci_read_config_word(pdev, SMBBA2, &vt596_smba) && |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 341 | (vt596_smba & 0x0001)) { |
| 342 | SMBHSTCFG = 0x84; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } else { |
| 344 | /* no matches at all */ |
| 345 | dev_err(&pdev->dev, "Cannot configure " |
| 346 | "SMBus I/O Base address\n"); |
| 347 | return -ENODEV; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | vt596_smba &= 0xfff0; |
| 352 | if (vt596_smba == 0) { |
| 353 | dev_err(&pdev->dev, "SMBus base address " |
| 354 | "uninitialized - upgrade BIOS or use " |
| 355 | "force_addr=0xaddr\n"); |
| 356 | return -ENODEV; |
| 357 | } |
| 358 | |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 359 | found: |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 360 | error = acpi_check_region(vt596_smba, 8, vt596_driver.name); |
| 361 | if (error) |
Jean Delvare | 18669ea | 2009-10-04 22:53:45 +0200 | [diff] [blame] | 362 | return -ENODEV; |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 363 | |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 364 | if (!request_region(vt596_smba, 8, vt596_driver.name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | dev_err(&pdev->dev, "SMBus region 0x%x already in use!\n", |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 366 | vt596_smba); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | return -ENODEV; |
| 368 | } |
| 369 | |
| 370 | pci_read_config_byte(pdev, SMBHSTCFG, &temp); |
| 371 | /* If force_addr is set, we program the new address here. Just to make |
| 372 | sure, we disable the VT596 first. */ |
| 373 | if (force_addr) { |
| 374 | pci_write_config_byte(pdev, SMBHSTCFG, temp & 0xfe); |
| 375 | pci_write_config_word(pdev, id->driver_data, vt596_smba); |
| 376 | pci_write_config_byte(pdev, SMBHSTCFG, temp | 0x01); |
| 377 | dev_warn(&pdev->dev, "WARNING: SMBus interface set to new " |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 378 | "address 0x%04x!\n", vt596_smba); |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 379 | } else if (!(temp & 0x01)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | if (force) { |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 381 | /* NOTE: This assumes I/O space and other allocations |
| 382 | * WERE done by the Bios! Don't complain if your |
| 383 | * hardware does weird things after enabling this. |
| 384 | * :') Check for Bios updates before resorting to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | * this. |
| 386 | */ |
Jean Delvare | c2f559d | 2005-09-22 22:01:07 +0200 | [diff] [blame] | 387 | pci_write_config_byte(pdev, SMBHSTCFG, temp | 0x01); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | dev_info(&pdev->dev, "Enabling SMBus device\n"); |
| 389 | } else { |
| 390 | dev_err(&pdev->dev, "SMBUS: Error: Host SMBus " |
| 391 | "controller not enabled! - upgrade BIOS or " |
| 392 | "use force=1\n"); |
Jean Delvare | 7c1f59c | 2012-01-12 20:32:03 +0100 | [diff] [blame] | 393 | error = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | goto release_region; |
| 395 | } |
| 396 | } |
| 397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | dev_dbg(&pdev->dev, "VT596_smba = 0x%X\n", vt596_smba); |
| 399 | |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 400 | switch (pdev->device) { |
Jean Delvare | ab6a6ed | 2007-02-13 22:09:02 +0100 | [diff] [blame] | 401 | case PCI_DEVICE_ID_VIA_CX700: |
Rudolf Marek | b806a71 | 2008-10-14 17:30:03 +0200 | [diff] [blame] | 402 | case PCI_DEVICE_ID_VIA_VX800: |
Harald Welte | a231591 | 2009-06-15 18:01:49 +0200 | [diff] [blame] | 403 | case PCI_DEVICE_ID_VIA_VX855: |
Rudolf Marek | c243353 | 2006-09-03 22:35:21 +0200 | [diff] [blame] | 404 | case PCI_DEVICE_ID_VIA_8251: |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 405 | case PCI_DEVICE_ID_VIA_8237: |
Rudolf Marek | c243353 | 2006-09-03 22:35:21 +0200 | [diff] [blame] | 406 | case PCI_DEVICE_ID_VIA_8237A: |
Jean Delvare | 0d227a7 | 2008-01-27 18:14:51 +0100 | [diff] [blame] | 407 | case PCI_DEVICE_ID_VIA_8237S: |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 408 | case PCI_DEVICE_ID_VIA_8235: |
| 409 | case PCI_DEVICE_ID_VIA_8233A: |
| 410 | case PCI_DEVICE_ID_VIA_8233_0: |
| 411 | vt596_features |= FEATURE_I2CBLOCK; |
| 412 | break; |
| 413 | case PCI_DEVICE_ID_VIA_82C686_4: |
| 414 | /* The VT82C686B (rev 0x40) does support I2C block |
| 415 | transactions, but the VT82C686A (rev 0x30) doesn't */ |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 416 | if (pdev->revision >= 0x40) |
Jean Delvare | f118301 | 2005-09-22 21:58:41 +0200 | [diff] [blame] | 417 | vt596_features |= FEATURE_I2CBLOCK; |
| 418 | break; |
| 419 | } |
| 420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | vt596_adapter.dev.parent = &pdev->dev; |
David Brownell | 2096b95 | 2007-05-01 23:26:28 +0200 | [diff] [blame] | 422 | snprintf(vt596_adapter.name, sizeof(vt596_adapter.name), |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 423 | "SMBus Via Pro adapter at %04x", vt596_smba); |
| 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | vt596_pdev = pci_dev_get(pdev); |
Jean Delvare | 7c1f59c | 2012-01-12 20:32:03 +0100 | [diff] [blame] | 426 | error = i2c_add_adapter(&vt596_adapter); |
| 427 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | pci_dev_put(vt596_pdev); |
| 429 | vt596_pdev = NULL; |
Jean Delvare | 7c1f59c | 2012-01-12 20:32:03 +0100 | [diff] [blame] | 430 | goto release_region; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | /* Always return failure here. This is to allow other drivers to bind |
| 434 | * to this pci device. We don't really want to have control over the |
| 435 | * pci device, we only wanted to read as few register values from it. |
| 436 | */ |
| 437 | return -ENODEV; |
| 438 | |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 439 | release_region: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | release_region(vt596_smba, 8); |
| 441 | return error; |
| 442 | } |
| 443 | |
Márton Németh | 4111ecd | 2010-03-02 12:23:37 +0100 | [diff] [blame] | 444 | static const struct pci_device_id vt596_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596_3), |
| 446 | .driver_data = SMBBA1 }, |
| 447 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C596B_3), |
| 448 | .driver_data = SMBBA1 }, |
| 449 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4), |
| 450 | .driver_data = SMBBA1 }, |
| 451 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_0), |
| 452 | .driver_data = SMBBA3 }, |
| 453 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233A), |
| 454 | .driver_data = SMBBA3 }, |
| 455 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235), |
| 456 | .driver_data = SMBBA3 }, |
| 457 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237), |
| 458 | .driver_data = SMBBA3 }, |
Rudolf Marek | c243353 | 2006-09-03 22:35:21 +0200 | [diff] [blame] | 459 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237A), |
| 460 | .driver_data = SMBBA3 }, |
Jean Delvare | 0d227a7 | 2008-01-27 18:14:51 +0100 | [diff] [blame] | 461 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8237S), |
| 462 | .driver_data = SMBBA3 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231_4), |
| 464 | .driver_data = SMBBA1 }, |
Rudolf Marek | c243353 | 2006-09-03 22:35:21 +0200 | [diff] [blame] | 465 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8251), |
| 466 | .driver_data = SMBBA3 }, |
Jean Delvare | ab6a6ed | 2007-02-13 22:09:02 +0100 | [diff] [blame] | 467 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700), |
| 468 | .driver_data = SMBBA3 }, |
Rudolf Marek | b806a71 | 2008-10-14 17:30:03 +0200 | [diff] [blame] | 469 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX800), |
| 470 | .driver_data = SMBBA3 }, |
Harald Welte | a231591 | 2009-06-15 18:01:49 +0200 | [diff] [blame] | 471 | { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX855), |
| 472 | .driver_data = SMBBA3 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { 0, } |
| 474 | }; |
| 475 | |
Jean Delvare | 5f49ef8 | 2005-09-22 21:50:47 +0200 | [diff] [blame] | 476 | MODULE_DEVICE_TABLE(pci, vt596_ids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
| 478 | static struct pci_driver vt596_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | .name = "vt596_smbus", |
| 480 | .id_table = vt596_ids, |
| 481 | .probe = vt596_probe, |
| 482 | }; |
| 483 | |
| 484 | static int __init i2c_vt596_init(void) |
| 485 | { |
| 486 | return pci_register_driver(&vt596_driver); |
| 487 | } |
| 488 | |
| 489 | |
| 490 | static void __exit i2c_vt596_exit(void) |
| 491 | { |
| 492 | pci_unregister_driver(&vt596_driver); |
| 493 | if (vt596_pdev != NULL) { |
| 494 | i2c_del_adapter(&vt596_adapter); |
| 495 | release_region(vt596_smba, 8); |
| 496 | pci_dev_put(vt596_pdev); |
| 497 | vt596_pdev = NULL; |
| 498 | } |
| 499 | } |
| 500 | |
Jean Delvare | 8750197 | 2005-10-31 18:51:21 +0100 | [diff] [blame] | 501 | MODULE_AUTHOR("Kyosti Malkki <kmalkki@cc.hut.fi>, " |
| 502 | "Mark D. Studebaker <mdsxyz123@yahoo.com> and " |
| 503 | "Jean Delvare <khali@linux-fr.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | MODULE_DESCRIPTION("vt82c596 SMBus driver"); |
| 505 | MODULE_LICENSE("GPL"); |
| 506 | |
| 507 | module_init(i2c_vt596_init); |
| 508 | module_exit(i2c_vt596_exit); |