Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | SMBus driver for nVidia nForce2 MCP |
| 3 | |
| 4 | Added nForce3 Pro 150 Thomas Leibold <thomas@plx.com>, |
| 5 | Ported to 2.5 Patrick Dreker <patrick@dreker.de>, |
| 6 | Copyright (c) 2003 Hans-Frieder Vogt <hfvogt@arcor.de>, |
| 7 | Based on |
| 8 | SMBus 2.0 driver for AMD-8111 IO-Hub |
| 9 | Copyright (c) 2002 Vojtech Pavlik |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 2 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program; if not, write to the Free Software |
| 23 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | SUPPORTED DEVICES PCI ID |
| 28 | nForce2 MCP 0064 |
| 29 | nForce2 Ultra 400 MCP 0084 |
| 30 | nForce3 Pro150 MCP 00D4 |
| 31 | nForce3 250Gb MCP 00E4 |
| 32 | nForce4 MCP 0052 |
Jean Delvare | 7c72ccf | 2005-12-18 17:25:18 +0100 | [diff] [blame] | 33 | nForce4 MCP-04 0034 |
Jean Delvare | d2dd14a | 2009-03-28 21:34:41 +0100 | [diff] [blame] | 34 | nForce MCP51 0264 |
| 35 | nForce MCP55 0368 |
Jean Delvare | f75803d | 2007-05-01 23:26:29 +0200 | [diff] [blame] | 36 | nForce MCP61 03EB |
| 37 | nForce MCP65 0446 |
Jean Delvare | d2dd14a | 2009-03-28 21:34:41 +0100 | [diff] [blame] | 38 | nForce MCP67 0542 |
| 39 | nForce MCP73 07D8 |
| 40 | nForce MCP78S 0752 |
| 41 | nForce MCP79 0AA2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | This driver supports the 2 SMBuses that are included in the MCP of the |
Hans-Frieder Vogt | ad04d5c | 2006-12-10 21:21:29 +0100 | [diff] [blame] | 44 | nForce2/3/4/5xx chipsets. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | */ |
| 46 | |
| 47 | /* Note: we assume there can only be one nForce2, with two SMBus interfaces */ |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/module.h> |
| 50 | #include <linux/pci.h> |
| 51 | #include <linux/kernel.h> |
| 52 | #include <linux/stddef.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <linux/ioport.h> |
| 54 | #include <linux/init.h> |
| 55 | #include <linux/i2c.h> |
| 56 | #include <linux/delay.h> |
Jean Delvare | 08851d6 | 2008-05-18 20:49:40 +0200 | [diff] [blame] | 57 | #include <linux/dmi.h> |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 58 | #include <linux/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #include <asm/io.h> |
| 60 | |
| 61 | MODULE_LICENSE("GPL"); |
Hans-Frieder Vogt | ad04d5c | 2006-12-10 21:21:29 +0100 | [diff] [blame] | 62 | MODULE_AUTHOR ("Hans-Frieder Vogt <hfvogt@gmx.net>"); |
| 63 | MODULE_DESCRIPTION("nForce2/3/4/5xx SMBus driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | |
| 66 | struct nforce2_smbus { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | struct i2c_adapter adapter; |
| 68 | int base; |
| 69 | int size; |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 70 | int blockops; |
Oleg Ryjkov | d49584c | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 71 | int can_abort; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | }; |
| 73 | |
| 74 | |
| 75 | /* |
| 76 | * nVidia nForce2 SMBus control register definitions |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 77 | * (Newer incarnations use standard BARs 4 and 5 instead) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | */ |
| 79 | #define NFORCE_PCI_SMB1 0x50 |
| 80 | #define NFORCE_PCI_SMB2 0x54 |
| 81 | |
| 82 | |
| 83 | /* |
| 84 | * ACPI 2.0 chapter 13 SMBus 2.0 EC register model |
| 85 | */ |
| 86 | #define NVIDIA_SMB_PRTCL (smbus->base + 0x00) /* protocol, PEC */ |
| 87 | #define NVIDIA_SMB_STS (smbus->base + 0x01) /* status */ |
| 88 | #define NVIDIA_SMB_ADDR (smbus->base + 0x02) /* address */ |
| 89 | #define NVIDIA_SMB_CMD (smbus->base + 0x03) /* command */ |
| 90 | #define NVIDIA_SMB_DATA (smbus->base + 0x04) /* 32 data registers */ |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 91 | #define NVIDIA_SMB_BCNT (smbus->base + 0x24) /* number of data |
| 92 | bytes */ |
Oleg Ryjkov | d49584c | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 93 | #define NVIDIA_SMB_STATUS_ABRT (smbus->base + 0x3c) /* register used to |
| 94 | check the status of |
| 95 | the abort command */ |
| 96 | #define NVIDIA_SMB_CTRL (smbus->base + 0x3e) /* control register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Oleg Ryjkov | d49584c | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 98 | #define NVIDIA_SMB_STATUS_ABRT_STS 0x01 /* Bit to notify that |
| 99 | abort succeeded */ |
| 100 | #define NVIDIA_SMB_CTRL_ABORT 0x20 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #define NVIDIA_SMB_STS_DONE 0x80 |
| 102 | #define NVIDIA_SMB_STS_ALRM 0x40 |
| 103 | #define NVIDIA_SMB_STS_RES 0x20 |
| 104 | #define NVIDIA_SMB_STS_STATUS 0x1f |
| 105 | |
| 106 | #define NVIDIA_SMB_PRTCL_WRITE 0x00 |
| 107 | #define NVIDIA_SMB_PRTCL_READ 0x01 |
| 108 | #define NVIDIA_SMB_PRTCL_QUICK 0x02 |
| 109 | #define NVIDIA_SMB_PRTCL_BYTE 0x04 |
| 110 | #define NVIDIA_SMB_PRTCL_BYTE_DATA 0x06 |
| 111 | #define NVIDIA_SMB_PRTCL_WORD_DATA 0x08 |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 112 | #define NVIDIA_SMB_PRTCL_BLOCK_DATA 0x0a |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | #define NVIDIA_SMB_PRTCL_PEC 0x80 |
| 114 | |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 115 | /* Misc definitions */ |
| 116 | #define MAX_TIMEOUT 100 |
| 117 | |
Jean Delvare | 08851d6 | 2008-05-18 20:49:40 +0200 | [diff] [blame] | 118 | /* We disable the second SMBus channel on these boards */ |
| 119 | static struct dmi_system_id __devinitdata nforce2_dmi_blacklist2[] = { |
| 120 | { |
| 121 | .ident = "DFI Lanparty NF4 Expert", |
| 122 | .matches = { |
| 123 | DMI_MATCH(DMI_BOARD_VENDOR, "DFI Corp,LTD"), |
| 124 | DMI_MATCH(DMI_BOARD_NAME, "LP UT NF4 Expert"), |
| 125 | }, |
| 126 | }, |
| 127 | { } |
| 128 | }; |
| 129 | |
Jean Delvare | d6072f8 | 2005-09-25 16:37:04 +0200 | [diff] [blame] | 130 | static struct pci_driver nforce2_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Jean Delvare | 279e902 | 2008-07-14 22:38:21 +0200 | [diff] [blame] | 132 | /* For multiplexing support, we need a global reference to the 1st |
| 133 | SMBus channel */ |
| 134 | #if defined CONFIG_I2C_NFORCE2_S4985 || defined CONFIG_I2C_NFORCE2_S4985_MODULE |
| 135 | struct i2c_adapter *nforce2_smbus; |
| 136 | EXPORT_SYMBOL_GPL(nforce2_smbus); |
| 137 | |
| 138 | static void nforce2_set_reference(struct i2c_adapter *adap) |
| 139 | { |
| 140 | nforce2_smbus = adap; |
| 141 | } |
| 142 | #else |
| 143 | static inline void nforce2_set_reference(struct i2c_adapter *adap) { } |
| 144 | #endif |
| 145 | |
Oleg Ryjkov | d49584c | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 146 | static void nforce2_abort(struct i2c_adapter *adap) |
| 147 | { |
| 148 | struct nforce2_smbus *smbus = adap->algo_data; |
| 149 | int timeout = 0; |
| 150 | unsigned char temp; |
| 151 | |
| 152 | dev_dbg(&adap->dev, "Aborting current transaction\n"); |
| 153 | |
| 154 | outb_p(NVIDIA_SMB_CTRL_ABORT, NVIDIA_SMB_CTRL); |
| 155 | do { |
| 156 | msleep(1); |
| 157 | temp = inb_p(NVIDIA_SMB_STATUS_ABRT); |
| 158 | } while (!(temp & NVIDIA_SMB_STATUS_ABRT_STS) && |
| 159 | (timeout++ < MAX_TIMEOUT)); |
| 160 | if (!(temp & NVIDIA_SMB_STATUS_ABRT_STS)) |
| 161 | dev_err(&adap->dev, "Can't reset the smbus\n"); |
| 162 | outb_p(NVIDIA_SMB_STATUS_ABRT_STS, NVIDIA_SMB_STATUS_ABRT); |
| 163 | } |
| 164 | |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 165 | static int nforce2_check_status(struct i2c_adapter *adap) |
| 166 | { |
| 167 | struct nforce2_smbus *smbus = adap->algo_data; |
| 168 | int timeout = 0; |
| 169 | unsigned char temp; |
| 170 | |
| 171 | do { |
| 172 | msleep(1); |
| 173 | temp = inb_p(NVIDIA_SMB_STS); |
| 174 | } while ((!temp) && (timeout++ < MAX_TIMEOUT)); |
| 175 | |
Roel Kluin | 4ccc28f | 2009-05-05 08:39:24 +0200 | [diff] [blame] | 176 | if (timeout > MAX_TIMEOUT) { |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 177 | dev_dbg(&adap->dev, "SMBus Timeout!\n"); |
Oleg Ryjkov | d49584c | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 178 | if (smbus->can_abort) |
| 179 | nforce2_abort(adap); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 180 | return -ETIMEDOUT; |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 181 | } |
| 182 | if (!(temp & NVIDIA_SMB_STS_DONE) || (temp & NVIDIA_SMB_STS_STATUS)) { |
| 183 | dev_dbg(&adap->dev, "Transaction failed (0x%02x)!\n", temp); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 184 | return -EIO; |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 185 | } |
| 186 | return 0; |
| 187 | } |
| 188 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 189 | /* Return negative errno on error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, |
| 191 | unsigned short flags, char read_write, |
| 192 | u8 command, int size, union i2c_smbus_data * data) |
| 193 | { |
| 194 | struct nforce2_smbus *smbus = adap->algo_data; |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 195 | unsigned char protocol, pec; |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 196 | u8 len; |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 197 | int i, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
| 199 | protocol = (read_write == I2C_SMBUS_READ) ? NVIDIA_SMB_PRTCL_READ : |
| 200 | NVIDIA_SMB_PRTCL_WRITE; |
| 201 | pec = (flags & I2C_CLIENT_PEC) ? NVIDIA_SMB_PRTCL_PEC : 0; |
| 202 | |
| 203 | switch (size) { |
| 204 | |
| 205 | case I2C_SMBUS_QUICK: |
| 206 | protocol |= NVIDIA_SMB_PRTCL_QUICK; |
| 207 | read_write = I2C_SMBUS_WRITE; |
| 208 | break; |
| 209 | |
| 210 | case I2C_SMBUS_BYTE: |
| 211 | if (read_write == I2C_SMBUS_WRITE) |
| 212 | outb_p(command, NVIDIA_SMB_CMD); |
| 213 | protocol |= NVIDIA_SMB_PRTCL_BYTE; |
| 214 | break; |
| 215 | |
| 216 | case I2C_SMBUS_BYTE_DATA: |
| 217 | outb_p(command, NVIDIA_SMB_CMD); |
| 218 | if (read_write == I2C_SMBUS_WRITE) |
| 219 | outb_p(data->byte, NVIDIA_SMB_DATA); |
| 220 | protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA; |
| 221 | break; |
| 222 | |
| 223 | case I2C_SMBUS_WORD_DATA: |
| 224 | outb_p(command, NVIDIA_SMB_CMD); |
| 225 | if (read_write == I2C_SMBUS_WRITE) { |
| 226 | outb_p(data->word, NVIDIA_SMB_DATA); |
| 227 | outb_p(data->word >> 8, NVIDIA_SMB_DATA+1); |
| 228 | } |
| 229 | protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec; |
| 230 | break; |
| 231 | |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 232 | case I2C_SMBUS_BLOCK_DATA: |
| 233 | outb_p(command, NVIDIA_SMB_CMD); |
| 234 | if (read_write == I2C_SMBUS_WRITE) { |
| 235 | len = data->block[0]; |
| 236 | if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) { |
| 237 | dev_err(&adap->dev, |
| 238 | "Transaction failed " |
| 239 | "(requested block size: %d)\n", |
| 240 | len); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 241 | return -EINVAL; |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 242 | } |
| 243 | outb_p(len, NVIDIA_SMB_BCNT); |
| 244 | for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++) |
| 245 | outb_p(data->block[i + 1], |
| 246 | NVIDIA_SMB_DATA+i); |
| 247 | } |
| 248 | protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec; |
| 249 | break; |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | default: |
| 252 | dev_err(&adap->dev, "Unsupported transaction %d\n", size); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 253 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR); |
| 257 | outb_p(protocol, NVIDIA_SMB_PRTCL); |
| 258 | |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 259 | status = nforce2_check_status(adap); |
| 260 | if (status) |
| 261 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
| 263 | if (read_write == I2C_SMBUS_WRITE) |
| 264 | return 0; |
| 265 | |
| 266 | switch (size) { |
| 267 | |
| 268 | case I2C_SMBUS_BYTE: |
| 269 | case I2C_SMBUS_BYTE_DATA: |
| 270 | data->byte = inb_p(NVIDIA_SMB_DATA); |
| 271 | break; |
| 272 | |
| 273 | case I2C_SMBUS_WORD_DATA: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | data->word = inb_p(NVIDIA_SMB_DATA) | (inb_p(NVIDIA_SMB_DATA+1) << 8); |
| 275 | break; |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 276 | |
| 277 | case I2C_SMBUS_BLOCK_DATA: |
| 278 | len = inb_p(NVIDIA_SMB_BCNT); |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 279 | if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) { |
| 280 | dev_err(&adap->dev, "Transaction failed " |
| 281 | "(received block size: 0x%02x)\n", |
| 282 | len); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 283 | return -EPROTO; |
Oleg Ryjkov | 4153549 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 284 | } |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 285 | for (i = 0; i < len; i++) |
| 286 | data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i); |
| 287 | data->block[0] = len; |
| 288 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | static u32 nforce2_func(struct i2c_adapter *adapter) |
| 296 | { |
| 297 | /* other functionality might be possible, but is not tested */ |
| 298 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 299 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
Jean Delvare | ac3f575 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 300 | I2C_FUNC_SMBUS_PEC | |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 301 | (((struct nforce2_smbus*)adapter->algo_data)->blockops ? |
| 302 | I2C_FUNC_SMBUS_BLOCK_DATA : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } |
| 304 | |
Hans-Frieder Vogt | ad04d5c | 2006-12-10 21:21:29 +0100 | [diff] [blame] | 305 | static struct i2c_algorithm smbus_algorithm = { |
| 306 | .smbus_xfer = nforce2_access, |
| 307 | .functionality = nforce2_func, |
| 308 | }; |
| 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
| 311 | static struct pci_device_id nforce2_ids[] = { |
| 312 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS) }, |
| 313 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SMBUS) }, |
| 314 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3_SMBUS) }, |
| 315 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SMBUS) }, |
| 316 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE4_SMBUS) }, |
Jean Delvare | 7c72ccf | 2005-12-18 17:25:18 +0100 | [diff] [blame] | 317 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SMBUS) }, |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 318 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS) }, |
| 319 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS) }, |
Jean Delvare | f75803d | 2007-05-01 23:26:29 +0200 | [diff] [blame] | 320 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SMBUS) }, |
| 321 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_SMBUS) }, |
Jean Delvare | d2dd14a | 2009-03-28 21:34:41 +0100 | [diff] [blame] | 322 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_SMBUS) }, |
| 323 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_SMBUS) }, |
| 324 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP78S_SMBUS) }, |
| 325 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP79_SMBUS) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { 0 } |
| 327 | }; |
| 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | MODULE_DEVICE_TABLE (pci, nforce2_ids); |
| 330 | |
| 331 | |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 332 | static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar, |
| 333 | int alt_reg, struct nforce2_smbus *smbus, const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | int error; |
| 336 | |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 337 | smbus->base = pci_resource_start(dev, bar); |
| 338 | if (smbus->base) { |
| 339 | smbus->size = pci_resource_len(dev, bar); |
| 340 | } else { |
| 341 | /* Older incarnations of the device used non-standard BARs */ |
| 342 | u16 iobase; |
| 343 | |
| 344 | if (pci_read_config_word(dev, alt_reg, &iobase) |
| 345 | != PCIBIOS_SUCCESSFUL) { |
| 346 | dev_err(&dev->dev, "Error reading PCI config for %s\n", |
| 347 | name); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 348 | return -EIO; |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | smbus->base = iobase & PCI_BASE_ADDRESS_IO_MASK; |
Hans-Frieder Vogt | ad04d5c | 2006-12-10 21:21:29 +0100 | [diff] [blame] | 352 | smbus->size = 64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Jean Delvare | 54fb4a05 | 2008-07-14 22:38:33 +0200 | [diff] [blame] | 355 | error = acpi_check_region(smbus->base, smbus->size, |
| 356 | nforce2_driver.name); |
| 357 | if (error) |
| 358 | return -1; |
| 359 | |
Jean Delvare | d6072f8 | 2005-09-25 16:37:04 +0200 | [diff] [blame] | 360 | if (!request_region(smbus->base, smbus->size, nforce2_driver.name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | dev_err(&smbus->adapter.dev, "Error requesting region %02x .. %02X for %s\n", |
| 362 | smbus->base, smbus->base+smbus->size-1, name); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 363 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
Hans-Frieder Vogt | ad04d5c | 2006-12-10 21:21:29 +0100 | [diff] [blame] | 365 | smbus->adapter.owner = THIS_MODULE; |
Jean Delvare | 3401b2f | 2008-07-14 22:38:29 +0200 | [diff] [blame] | 366 | smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; |
Hans-Frieder Vogt | ad04d5c | 2006-12-10 21:21:29 +0100 | [diff] [blame] | 367 | smbus->adapter.algo = &smbus_algorithm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | smbus->adapter.algo_data = smbus; |
| 369 | smbus->adapter.dev.parent = &dev->dev; |
David Brownell | 2096b95 | 2007-05-01 23:26:28 +0200 | [diff] [blame] | 370 | snprintf(smbus->adapter.name, sizeof(smbus->adapter.name), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | "SMBus nForce2 adapter at %04x", smbus->base); |
| 372 | |
| 373 | error = i2c_add_adapter(&smbus->adapter); |
| 374 | if (error) { |
| 375 | dev_err(&smbus->adapter.dev, "Failed to register adapter.\n"); |
| 376 | release_region(smbus->base, smbus->size); |
David Brownell | 9714034 | 2008-07-14 22:38:25 +0200 | [diff] [blame] | 377 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", smbus->base); |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| 385 | { |
| 386 | struct nforce2_smbus *smbuses; |
| 387 | int res1, res2; |
| 388 | |
| 389 | /* we support 2 SMBus adapters */ |
Jean Delvare | 078d9fe | 2005-10-17 23:12:36 +0200 | [diff] [blame] | 390 | if (!(smbuses = kzalloc(2*sizeof(struct nforce2_smbus), GFP_KERNEL))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | pci_set_drvdata(dev, smbuses); |
| 393 | |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 394 | switch(dev->device) { |
Jean Delvare | 541b6a7 | 2008-01-27 18:14:44 +0100 | [diff] [blame] | 395 | case PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS: |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 396 | case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS: |
| 397 | case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS: |
| 398 | smbuses[0].blockops = 1; |
| 399 | smbuses[1].blockops = 1; |
Oleg Ryjkov | d49584c | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 400 | smbuses[0].can_abort = 1; |
| 401 | smbuses[1].can_abort = 1; |
Oleg Ryjkov | b53c822 | 2007-07-12 14:12:29 +0200 | [diff] [blame] | 402 | } |
| 403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | /* SMBus adapter 1 */ |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 405 | res1 = nforce2_probe_smb(dev, 4, NFORCE_PCI_SMB1, &smbuses[0], "SMB1"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | if (res1 < 0) { |
| 407 | dev_err(&dev->dev, "Error probing SMB1.\n"); |
| 408 | smbuses[0].base = 0; /* to have a check value */ |
| 409 | } |
Jean Delvare | 5c7ae65 | 2006-04-25 14:18:16 +0200 | [diff] [blame] | 410 | /* SMBus adapter 2 */ |
Jean Delvare | 08851d6 | 2008-05-18 20:49:40 +0200 | [diff] [blame] | 411 | if (dmi_check_system(nforce2_dmi_blacklist2)) { |
| 412 | dev_err(&dev->dev, "Disabling SMB2 for safety reasons.\n"); |
| 413 | res2 = -EPERM; |
| 414 | smbuses[1].base = 0; |
| 415 | } else { |
| 416 | res2 = nforce2_probe_smb(dev, 5, NFORCE_PCI_SMB2, &smbuses[1], |
| 417 | "SMB2"); |
| 418 | if (res2 < 0) { |
| 419 | dev_err(&dev->dev, "Error probing SMB2.\n"); |
| 420 | smbuses[1].base = 0; /* to have a check value */ |
| 421 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | if ((res1 < 0) && (res2 < 0)) { |
| 424 | /* we did not find even one of the SMBuses, so we give up */ |
| 425 | kfree(smbuses); |
| 426 | return -ENODEV; |
| 427 | } |
| 428 | |
Jean Delvare | 279e902 | 2008-07-14 22:38:21 +0200 | [diff] [blame] | 429 | nforce2_set_reference(&smbuses[0].adapter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | |
| 434 | static void __devexit nforce2_remove(struct pci_dev *dev) |
| 435 | { |
| 436 | struct nforce2_smbus *smbuses = (void*) pci_get_drvdata(dev); |
| 437 | |
Jean Delvare | 279e902 | 2008-07-14 22:38:21 +0200 | [diff] [blame] | 438 | nforce2_set_reference(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | if (smbuses[0].base) { |
| 440 | i2c_del_adapter(&smbuses[0].adapter); |
| 441 | release_region(smbuses[0].base, smbuses[0].size); |
| 442 | } |
| 443 | if (smbuses[1].base) { |
| 444 | i2c_del_adapter(&smbuses[1].adapter); |
| 445 | release_region(smbuses[1].base, smbuses[1].size); |
| 446 | } |
| 447 | kfree(smbuses); |
| 448 | } |
| 449 | |
| 450 | static struct pci_driver nforce2_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | .name = "nForce2_smbus", |
| 452 | .id_table = nforce2_ids, |
| 453 | .probe = nforce2_probe, |
| 454 | .remove = __devexit_p(nforce2_remove), |
| 455 | }; |
| 456 | |
| 457 | static int __init nforce2_init(void) |
| 458 | { |
| 459 | return pci_register_driver(&nforce2_driver); |
| 460 | } |
| 461 | |
| 462 | static void __exit nforce2_exit(void) |
| 463 | { |
| 464 | pci_unregister_driver(&nforce2_driver); |
| 465 | } |
| 466 | |
| 467 | module_init(nforce2_init); |
| 468 | module_exit(nforce2_exit); |
| 469 | |