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Rev | Author | Line No. | Line |
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420 | giacomo | 1 | /* |
2 | i2c-ali1535.c - Part of lm_sensors, Linux kernel modules for hardware |
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3 | monitoring |
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4 | Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, |
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5 | Philip Edelbrock <phil@netroedge.com>, |
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6 | Mark D. Studebaker <mdsxyz123@yahoo.com>, |
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7 | Dan Eaton <dan.eaton@rocketlogix.com> and |
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8 | Stephen Rousset<stephen.rousset@rocketlogix.com> |
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9 | |||
10 | This program is free software; you can redistribute it and/or modify |
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11 | it under the terms of the GNU General Public License as published by |
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12 | the Free Software Foundation; either version 2 of the License, or |
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13 | (at your option) any later version. |
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14 | |||
15 | This program is distributed in the hope that it will be useful, |
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 | GNU General Public License for more details. |
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19 | |||
20 | You should have received a copy of the GNU General Public License |
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21 | along with this program; if not, write to the Free Software |
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22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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23 | */ |
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24 | |||
25 | /* |
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26 | This is the driver for the SMB Host controller on |
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27 | Acer Labs Inc. (ALI) M1535 South Bridge. |
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28 | |||
29 | The M1535 is a South bridge for portable systems. |
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30 | It is very similar to the M15x3 South bridges also produced |
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31 | by Acer Labs Inc. Some of the registers within the part |
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32 | have moved and some have been redefined slightly. Additionally, |
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33 | the sequencing of the SMBus transactions has been modified |
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34 | to be more consistent with the sequencing recommended by |
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35 | the manufacturer and observed through testing. These |
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36 | changes are reflected in this driver and can be identified |
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37 | by comparing this driver to the i2c-ali15x3 driver. |
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38 | For an overview of these chips see http://www.acerlabs.com |
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39 | |||
40 | The SMB controller is part of the 7101 device, which is an |
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41 | ACPI-compliant Power Management Unit (PMU). |
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42 | |||
43 | The whole 7101 device has to be enabled for the SMB to work. |
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44 | You can't just enable the SMB alone. |
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45 | The SMB and the ACPI have separate I/O spaces. |
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46 | We make sure that the SMB is enabled. We leave the ACPI alone. |
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47 | |||
48 | This driver controls the SMB Host only. |
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49 | |||
50 | This driver does not use interrupts. |
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51 | */ |
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52 | |||
53 | |||
54 | /* Note: we assume there can only be one ALI1535, with one SMBus interface */ |
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55 | |||
56 | /* #define DEBUG 1 */ |
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57 | |||
58 | #include <linux/module.h> |
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59 | #include <linux/pci.h> |
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60 | #include <linux/kernel.h> |
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61 | #include <linux/stddef.h> |
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62 | #include <linux/sched.h> |
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63 | #include <linux/ioport.h> |
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64 | #include <linux/i2c.h> |
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65 | #include <linux/init.h> |
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66 | #include <asm/io.h> |
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67 | #include <asm/semaphore.h> |
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68 | |||
69 | |||
70 | /* ALI1535 SMBus address offsets */ |
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71 | #define SMBHSTSTS (0 + ali1535_smba) |
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72 | #define SMBHSTTYP (1 + ali1535_smba) |
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73 | #define SMBHSTPORT (2 + ali1535_smba) |
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74 | #define SMBHSTCMD (7 + ali1535_smba) |
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75 | #define SMBHSTADD (3 + ali1535_smba) |
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76 | #define SMBHSTDAT0 (4 + ali1535_smba) |
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77 | #define SMBHSTDAT1 (5 + ali1535_smba) |
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78 | #define SMBBLKDAT (6 + ali1535_smba) |
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79 | |||
80 | /* PCI Address Constants */ |
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81 | #define SMBCOM 0x004 |
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82 | #define SMBREV 0x008 |
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83 | #define SMBCFG 0x0D1 |
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84 | #define SMBBA 0x0E2 |
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85 | #define SMBHSTCFG 0x0F0 |
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86 | #define SMBCLK 0x0F2 |
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87 | |||
88 | /* Other settings */ |
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89 | #define MAX_TIMEOUT 500 /* times 1/100 sec */ |
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90 | #define ALI1535_SMB_IOSIZE 32 |
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91 | |||
92 | #define ALI1535_SMB_DEFAULTBASE 0x8040 |
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93 | |||
94 | /* ALI1535 address lock bits */ |
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95 | #define ALI1535_LOCK 0x06 /* dwe */ |
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96 | |||
97 | /* ALI1535 command constants */ |
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98 | #define ALI1535_QUICK 0x00 |
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99 | #define ALI1535_BYTE 0x10 |
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100 | #define ALI1535_BYTE_DATA 0x20 |
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101 | #define ALI1535_WORD_DATA 0x30 |
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102 | #define ALI1535_BLOCK_DATA 0x40 |
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103 | #define ALI1535_I2C_READ 0x60 |
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104 | |||
105 | #define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ |
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106 | /* I2C read */ |
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107 | #define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ |
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108 | #define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ |
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109 | /* Alert-Response-Address */ |
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110 | /* (read) */ |
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111 | #define ALI1535_KILL 0x04 /* Kill Command (write) */ |
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112 | #define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ |
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113 | /* Alert-Response-Address */ |
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114 | /* (read) */ |
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115 | |||
116 | #define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ |
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117 | /* of 10-bit address in I2C */ |
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118 | /* Read Command */ |
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119 | |||
120 | /* ALI1535 status register bits */ |
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121 | #define ALI1535_STS_IDLE 0x04 |
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122 | #define ALI1535_STS_BUSY 0x08 /* host busy */ |
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123 | #define ALI1535_STS_DONE 0x10 /* transaction complete */ |
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124 | #define ALI1535_STS_DEV 0x20 /* device error */ |
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125 | #define ALI1535_STS_BUSERR 0x40 /* bus error */ |
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126 | #define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ |
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127 | #define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ |
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128 | |||
129 | #define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ |
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130 | |||
131 | /* ALI1535 device address register bits */ |
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132 | #define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ |
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133 | /* Address field */ |
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134 | /* -> Write = 0 */ |
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135 | /* -> Read = 1 */ |
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136 | #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ |
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137 | |||
138 | |||
139 | static unsigned short ali1535_smba; |
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140 | DECLARE_MUTEX(i2c_ali1535_sem); |
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141 | |||
142 | /* Detect whether a ALI1535 can be found, and initialize it, where necessary. |
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143 | Note the differences between kernels with the old PCI BIOS interface and |
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144 | newer kernels with the real PCI interface. In compat.h some things are |
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145 | defined to make the transition easier. */ |
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146 | static int ali1535_setup(struct pci_dev *dev) |
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147 | { |
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148 | int retval = -ENODEV; |
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149 | unsigned char temp; |
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150 | |||
151 | /* Check the following things: |
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152 | - SMB I/O address is initialized |
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153 | - Device is enabled |
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154 | - We can use the addresses |
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155 | */ |
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156 | |||
157 | /* Determine the address of the SMBus area */ |
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158 | pci_read_config_word(dev, SMBBA, &ali1535_smba); |
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159 | ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); |
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160 | if (ali1535_smba == 0) { |
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161 | dev_warn(&dev->dev, |
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162 | "ALI1535_smb region uninitialized - upgrade BIOS?\n"); |
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163 | goto exit; |
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164 | } |
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165 | |||
166 | if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, "ali1535-smb")) { |
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167 | dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n", |
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168 | ali1535_smba); |
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169 | goto exit; |
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170 | } |
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171 | |||
172 | /* check if whole device is enabled */ |
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173 | pci_read_config_byte(dev, SMBCFG, &temp); |
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174 | if ((temp & ALI1535_SMBIO_EN) == 0) { |
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175 | dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); |
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176 | goto exit_free; |
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177 | } |
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178 | |||
179 | /* Is SMB Host controller enabled? */ |
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180 | pci_read_config_byte(dev, SMBHSTCFG, &temp); |
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181 | if ((temp & 1) == 0) { |
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182 | dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n"); |
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183 | goto exit_free; |
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184 | } |
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185 | |||
186 | /* set SMB clock to 74KHz as recommended in data sheet */ |
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187 | pci_write_config_byte(dev, SMBCLK, 0x20); |
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188 | |||
189 | /* |
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190 | The interrupt routing for SMB is set up in register 0x77 in the |
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191 | 1533 ISA Bridge device, NOT in the 7101 device. |
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192 | Don't bother with finding the 1533 device and reading the register. |
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193 | if ((....... & 0x0F) == 1) |
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194 | dev_dbg(&dev->dev, "ALI1535 using Interrupt 9 for SMBus.\n"); |
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195 | */ |
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196 | pci_read_config_byte(dev, SMBREV, &temp); |
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197 | dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp); |
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198 | dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba); |
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199 | |||
200 | retval = 0; |
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201 | exit: |
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202 | return retval; |
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203 | |||
204 | exit_free: |
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205 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); |
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206 | return retval; |
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207 | } |
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208 | |||
209 | static int ali1535_transaction(struct i2c_adapter *adap) |
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210 | { |
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211 | int temp; |
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212 | int result = 0; |
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213 | int timeout = 0; |
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214 | |||
215 | dev_dbg(&adap->dev, "Transaction (pre): STS=%02x, TYP=%02x, " |
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216 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", |
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217 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), |
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218 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); |
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219 | |||
220 | /* get status */ |
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221 | temp = inb_p(SMBHSTSTS); |
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222 | |||
223 | /* Make sure the SMBus host is ready to start transmitting */ |
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224 | /* Check the busy bit first */ |
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225 | if (temp & ALI1535_STS_BUSY) { |
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226 | /* If the host controller is still busy, it may have timed out |
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227 | * in the previous transaction, resulting in a "SMBus Timeout" |
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228 | * printk. I've tried the following to reset a stuck busy bit. |
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229 | * 1. Reset the controller with an KILL command. (this |
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230 | * doesn't seem to clear the controller if an external |
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231 | * device is hung) |
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232 | * 2. Reset the controller and the other SMBus devices with a |
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233 | * T_OUT command. (this clears the host busy bit if an |
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234 | * external device is hung, but it comes back upon a new |
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235 | * access to a device) |
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236 | * 3. Disable and reenable the controller in SMBHSTCFG. Worst |
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237 | * case, nothing seems to work except power reset. |
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238 | */ |
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239 | |||
240 | /* Try resetting entire SMB bus, including other devices - This |
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241 | * may not work either - it clears the BUSY bit but then the |
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242 | * BUSY bit may come back on when you try and use the chip |
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243 | * again. If that's the case you are stuck. |
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244 | */ |
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245 | dev_info(&adap->dev, |
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246 | "Resetting entire SMB Bus to clear busy condition (%02x)\n", |
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247 | temp); |
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248 | outb_p(ALI1535_T_OUT, SMBHSTTYP); |
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249 | temp = inb_p(SMBHSTSTS); |
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250 | } |
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251 | |||
252 | /* now check the error bits and the busy bit */ |
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253 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { |
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254 | /* do a clear-on-write */ |
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255 | outb_p(0xFF, SMBHSTSTS); |
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256 | if ((temp = inb_p(SMBHSTSTS)) & |
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257 | (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { |
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258 | /* This is probably going to be correctable only by a |
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259 | * power reset as one of the bits now appears to be |
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260 | * stuck */ |
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261 | /* This may be a bus or device with electrical problems. */ |
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262 | dev_err(&adap->dev, |
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263 | "SMBus reset failed! (0x%02x) - controller or " |
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264 | "device on bus is probably hung\n", temp); |
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265 | return -1; |
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266 | } |
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267 | } else { |
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268 | /* check and clear done bit */ |
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269 | if (temp & ALI1535_STS_DONE) { |
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270 | outb_p(temp, SMBHSTSTS); |
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271 | } |
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272 | } |
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273 | |||
274 | /* start the transaction by writing anything to the start register */ |
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275 | outb_p(0xFF, SMBHSTPORT); |
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276 | |||
277 | /* We will always wait for a fraction of a second! */ |
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278 | timeout = 0; |
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279 | do { |
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280 | i2c_delay(1); |
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281 | temp = inb_p(SMBHSTSTS); |
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282 | } while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE)) |
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283 | && (timeout++ < MAX_TIMEOUT)); |
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284 | |||
285 | /* If the SMBus is still busy, we give up */ |
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286 | if (timeout >= MAX_TIMEOUT) { |
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287 | result = -1; |
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288 | dev_err(&adap->dev, "SMBus Timeout!\n"); |
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289 | } |
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290 | |||
291 | if (temp & ALI1535_STS_FAIL) { |
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292 | result = -1; |
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293 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); |
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294 | } |
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295 | |||
296 | /* Unfortunately the ALI SMB controller maps "no response" and "bus |
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297 | * collision" into a single bit. No reponse is the usual case so don't |
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298 | * do a printk. This means that bus collisions go unreported. |
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299 | */ |
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300 | if (temp & ALI1535_STS_BUSERR) { |
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301 | result = -1; |
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302 | dev_dbg(&adap->dev, |
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303 | "Error: no response or bus collision ADD=%02x\n", |
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304 | inb_p(SMBHSTADD)); |
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305 | } |
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306 | |||
307 | /* haven't ever seen this */ |
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308 | if (temp & ALI1535_STS_DEV) { |
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309 | result = -1; |
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310 | dev_err(&adap->dev, "Error: device error\n"); |
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311 | } |
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312 | |||
313 | /* check to see if the "command complete" indication is set */ |
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314 | if (!(temp & ALI1535_STS_DONE)) { |
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315 | result = -1; |
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316 | dev_err(&adap->dev, "Error: command never completed\n"); |
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317 | } |
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318 | |||
319 | dev_dbg(&adap->dev, "Transaction (post): STS=%02x, TYP=%02x, " |
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320 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", |
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321 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), |
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322 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); |
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323 | |||
324 | /* take consequent actions for error conditions */ |
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325 | if (!(temp & ALI1535_STS_DONE)) { |
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326 | /* issue "kill" to reset host controller */ |
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327 | outb_p(ALI1535_KILL,SMBHSTTYP); |
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328 | outb_p(0xFF,SMBHSTSTS); |
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329 | } else if (temp & ALI1535_STS_ERR) { |
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330 | /* issue "timeout" to reset all devices on bus */ |
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331 | outb_p(ALI1535_T_OUT,SMBHSTTYP); |
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332 | outb_p(0xFF,SMBHSTSTS); |
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333 | } |
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334 | |||
335 | return result; |
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336 | } |
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337 | |||
338 | /* Return -1 on error. */ |
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339 | static s32 ali1535_access(struct i2c_adapter *adap, u16 addr, |
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340 | unsigned short flags, char read_write, u8 command, |
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341 | int size, union i2c_smbus_data *data) |
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342 | { |
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343 | int i, len; |
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344 | int temp; |
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345 | int timeout; |
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346 | s32 result = 0; |
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347 | |||
348 | down(&i2c_ali1535_sem); |
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349 | /* make sure SMBus is idle */ |
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350 | temp = inb_p(SMBHSTSTS); |
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351 | for (timeout = 0; |
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352 | (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); |
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353 | timeout++) { |
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354 | i2c_delay(1); |
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355 | temp = inb_p(SMBHSTSTS); |
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356 | } |
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357 | if (timeout >= MAX_TIMEOUT) |
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358 | dev_warn(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp); |
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359 | |||
360 | /* clear status register (clear-on-write) */ |
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361 | outb_p(0xFF, SMBHSTSTS); |
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362 | |||
363 | switch (size) { |
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364 | case I2C_SMBUS_PROC_CALL: |
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365 | dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n"); |
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366 | result = -1; |
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367 | goto EXIT; |
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368 | case I2C_SMBUS_QUICK: |
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369 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
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370 | SMBHSTADD); |
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371 | size = ALI1535_QUICK; |
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372 | outb_p(size, SMBHSTTYP); /* output command */ |
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373 | break; |
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374 | case I2C_SMBUS_BYTE: |
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375 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
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376 | SMBHSTADD); |
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377 | size = ALI1535_BYTE; |
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378 | outb_p(size, SMBHSTTYP); /* output command */ |
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379 | if (read_write == I2C_SMBUS_WRITE) |
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380 | outb_p(command, SMBHSTCMD); |
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381 | break; |
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382 | case I2C_SMBUS_BYTE_DATA: |
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383 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
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384 | SMBHSTADD); |
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385 | size = ALI1535_BYTE_DATA; |
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386 | outb_p(size, SMBHSTTYP); /* output command */ |
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387 | outb_p(command, SMBHSTCMD); |
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388 | if (read_write == I2C_SMBUS_WRITE) |
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389 | outb_p(data->byte, SMBHSTDAT0); |
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390 | break; |
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391 | case I2C_SMBUS_WORD_DATA: |
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392 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
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393 | SMBHSTADD); |
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394 | size = ALI1535_WORD_DATA; |
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395 | outb_p(size, SMBHSTTYP); /* output command */ |
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396 | outb_p(command, SMBHSTCMD); |
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397 | if (read_write == I2C_SMBUS_WRITE) { |
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398 | outb_p(data->word & 0xff, SMBHSTDAT0); |
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399 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); |
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400 | } |
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401 | break; |
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402 | case I2C_SMBUS_BLOCK_DATA: |
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403 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), |
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404 | SMBHSTADD); |
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405 | size = ALI1535_BLOCK_DATA; |
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406 | outb_p(size, SMBHSTTYP); /* output command */ |
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407 | outb_p(command, SMBHSTCMD); |
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408 | if (read_write == I2C_SMBUS_WRITE) { |
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409 | len = data->block[0]; |
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410 | if (len < 0) { |
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411 | len = 0; |
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412 | data->block[0] = len; |
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413 | } |
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414 | if (len > 32) { |
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415 | len = 32; |
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416 | data->block[0] = len; |
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417 | } |
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418 | outb_p(len, SMBHSTDAT0); |
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419 | /* Reset SMBBLKDAT */ |
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420 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); |
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421 | for (i = 1; i <= len; i++) |
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422 | outb_p(data->block[i], SMBBLKDAT); |
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423 | } |
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424 | break; |
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425 | } |
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426 | |||
427 | if (ali1535_transaction(adap)) { |
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428 | /* Error in transaction */ |
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429 | result = -1; |
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430 | goto EXIT; |
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431 | } |
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432 | |||
433 | if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) { |
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434 | result = 0; |
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435 | goto EXIT; |
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436 | } |
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437 | |||
438 | switch (size) { |
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439 | case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ |
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440 | data->byte = inb_p(SMBHSTDAT0); |
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441 | break; |
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442 | case ALI1535_BYTE_DATA: |
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443 | data->byte = inb_p(SMBHSTDAT0); |
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444 | break; |
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445 | case ALI1535_WORD_DATA: |
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446 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); |
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447 | break; |
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448 | case ALI1535_BLOCK_DATA: |
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449 | len = inb_p(SMBHSTDAT0); |
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450 | if (len > 32) |
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451 | len = 32; |
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452 | data->block[0] = len; |
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453 | /* Reset SMBBLKDAT */ |
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454 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); |
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455 | for (i = 1; i <= data->block[0]; i++) { |
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456 | data->block[i] = inb_p(SMBBLKDAT); |
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457 | dev_dbg(&adap->dev, "Blk: len=%d, i=%d, data=%02x\n", |
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458 | len, i, data->block[i]); |
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459 | } |
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460 | break; |
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461 | } |
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462 | EXIT: |
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463 | up(&i2c_ali1535_sem); |
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464 | return result; |
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465 | } |
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466 | |||
467 | |||
468 | u32 ali1535_func(struct i2c_adapter *adapter) |
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469 | { |
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470 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
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471 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
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472 | I2C_FUNC_SMBUS_BLOCK_DATA; |
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473 | } |
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474 | |||
475 | static struct i2c_algorithm smbus_algorithm = { |
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476 | .name = "Non-i2c SMBus adapter", |
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477 | .id = I2C_ALGO_SMBUS, |
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478 | .smbus_xfer = ali1535_access, |
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479 | .functionality = ali1535_func, |
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480 | }; |
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481 | |||
482 | static struct i2c_adapter ali1535_adapter = { |
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483 | .owner = THIS_MODULE, |
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484 | .algo = &smbus_algorithm, |
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485 | .name = "unset", |
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486 | }; |
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487 | |||
488 | static struct pci_device_id ali1535_ids[] = { |
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489 | { |
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490 | .vendor = PCI_VENDOR_ID_AL, |
||
491 | .device = PCI_DEVICE_ID_AL_M7101, |
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492 | .subvendor = PCI_ANY_ID, |
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493 | .subdevice = PCI_ANY_ID, |
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494 | }, |
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495 | { }, |
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496 | }; |
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497 | |||
498 | static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) |
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499 | { |
||
500 | if (ali1535_setup(dev)) { |
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501 | dev_warn(&dev->dev, |
||
502 | "ALI1535 not detected, module not inserted.\n"); |
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503 | return -ENODEV; |
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504 | } |
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505 | |||
506 | /* set up the driverfs linkage to our parent device */ |
||
507 | ali1535_adapter.dev.parent = &dev->dev; |
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508 | |||
509 | snprintf(ali1535_adapter.name, I2C_NAME_SIZE, |
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510 | "SMBus ALI1535 adapter at %04x", ali1535_smba); |
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511 | return i2c_add_adapter(&ali1535_adapter); |
||
512 | } |
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513 | |||
514 | static void __devexit ali1535_remove(struct pci_dev *dev) |
||
515 | { |
||
516 | i2c_del_adapter(&ali1535_adapter); |
||
517 | } |
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518 | |||
519 | static struct pci_driver ali1535_driver = { |
||
520 | .name = "ali1535_smbus", |
||
521 | .id_table = ali1535_ids, |
||
522 | .probe = ali1535_probe, |
||
523 | .remove = __devexit_p(ali1535_remove), |
||
524 | }; |
||
525 | |||
526 | static int __init i2c_ali1535_init(void) |
||
527 | { |
||
528 | return pci_module_init(&ali1535_driver); |
||
529 | } |
||
530 | |||
531 | static void __exit i2c_ali1535_exit(void) |
||
532 | { |
||
533 | pci_unregister_driver(&ali1535_driver); |
||
534 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); |
||
535 | } |
||
536 | |||
537 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " |
||
538 | "Philip Edelbrock <phil@netroedge.com>, " |
||
539 | "Mark D. Studebaker <mdsxyz123@yahoo.com> " |
||
540 | "and Dan Eaton <dan.eaton@rocketlogix.com>"); |
||
541 | MODULE_DESCRIPTION("ALI1535 SMBus driver"); |
||
542 | MODULE_LICENSE("GPL"); |
||
543 | |||
544 | module_init(i2c_ali1535_init); |
||
545 | module_exit(i2c_ali1535_exit); |