Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 1 | /* |
| 2 | i2c Support for Apple SMU Controller |
| 3 | |
| 4 | Copyright (c) 2005 Benjamin Herrenschmidt, IBM Corp. |
| 5 | <benh@kernel.crashing.org> |
| 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 | |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 17 | */ |
| 18 | |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/i2c.h> |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 23 | #include <linux/device.h> |
| 24 | #include <linux/platform_device.h> |
Rob Herring | 5af5073 | 2013-09-17 14:28:33 -0500 | [diff] [blame] | 25 | #include <linux/of_irq.h> |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 26 | #include <asm/prom.h> |
| 27 | #include <asm/pmac_low_i2c.h> |
| 28 | |
| 29 | MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>"); |
| 30 | MODULE_DESCRIPTION("I2C driver for Apple PowerMac"); |
| 31 | MODULE_LICENSE("GPL"); |
| 32 | |
| 33 | /* |
| 34 | * SMBUS-type transfer entrypoint |
| 35 | */ |
| 36 | static s32 i2c_powermac_smbus_xfer( struct i2c_adapter* adap, |
| 37 | u16 addr, |
| 38 | unsigned short flags, |
| 39 | char read_write, |
| 40 | u8 command, |
| 41 | int size, |
| 42 | union i2c_smbus_data* data) |
| 43 | { |
| 44 | struct pmac_i2c_bus *bus = i2c_get_adapdata(adap); |
| 45 | int rc = 0; |
| 46 | int read = (read_write == I2C_SMBUS_READ); |
| 47 | int addrdir = (addr << 1) | read; |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 48 | int mode, subsize, len; |
| 49 | u32 subaddr; |
| 50 | u8 *buf; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 51 | u8 local[2]; |
| 52 | |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 53 | if (size == I2C_SMBUS_QUICK || size == I2C_SMBUS_BYTE) { |
| 54 | mode = pmac_i2c_mode_std; |
| 55 | subsize = 0; |
| 56 | subaddr = 0; |
| 57 | } else { |
| 58 | mode = read ? pmac_i2c_mode_combined : pmac_i2c_mode_stdsub; |
| 59 | subsize = 1; |
| 60 | subaddr = command; |
| 61 | } |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 62 | |
| 63 | switch (size) { |
| 64 | case I2C_SMBUS_QUICK: |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 65 | buf = NULL; |
| 66 | len = 0; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 67 | break; |
| 68 | case I2C_SMBUS_BYTE: |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 69 | case I2C_SMBUS_BYTE_DATA: |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 70 | buf = &data->byte; |
| 71 | len = 1; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 72 | break; |
| 73 | case I2C_SMBUS_WORD_DATA: |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 74 | if (!read) { |
| 75 | local[0] = data->word & 0xff; |
| 76 | local[1] = (data->word >> 8) & 0xff; |
| 77 | } |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 78 | buf = local; |
| 79 | len = 2; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 80 | break; |
| 81 | |
| 82 | /* Note that these are broken vs. the expected smbus API where |
Joe Perches | 96acafe | 2008-01-14 21:53:30 +0100 | [diff] [blame] | 83 | * on reads, the length is actually returned from the function, |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 84 | * but I think the current API makes no sense and I don't want |
| 85 | * any driver that I haven't verified for correctness to go |
| 86 | * anywhere near a pmac i2c bus anyway ... |
| 87 | * |
| 88 | * I'm also not completely sure what kind of phases to do between |
| 89 | * the actual command and the data (what I am _supposed_ to do that |
| 90 | * is). For now, I assume writes are a single stream and reads have |
| 91 | * a repeat start/addr phase (but not stop in between) |
| 92 | */ |
| 93 | case I2C_SMBUS_BLOCK_DATA: |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 94 | buf = data->block; |
| 95 | len = data->block[0] + 1; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 96 | break; |
| 97 | case I2C_SMBUS_I2C_BLOCK_DATA: |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 98 | buf = &data->block[1]; |
| 99 | len = data->block[0]; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 100 | break; |
| 101 | |
| 102 | default: |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 103 | return -EINVAL; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 104 | } |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 105 | |
| 106 | rc = pmac_i2c_open(bus, 0); |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 107 | if (rc) { |
| 108 | dev_err(&adap->dev, "Failed to open I2C, err %d\n", rc); |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 109 | return rc; |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 110 | } |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 111 | |
| 112 | rc = pmac_i2c_setmode(bus, mode); |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 113 | if (rc) { |
| 114 | dev_err(&adap->dev, "Failed to set I2C mode %d, err %d\n", |
| 115 | mode, rc); |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 116 | goto bail; |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 117 | } |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 118 | |
| 119 | rc = pmac_i2c_xfer(bus, addrdir, subsize, subaddr, buf, len); |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 120 | if (rc) { |
Jean Delvare | 8e4b980 | 2010-03-13 20:56:52 +0100 | [diff] [blame] | 121 | if (rc == -ENXIO) |
| 122 | dev_dbg(&adap->dev, |
| 123 | "I2C transfer at 0x%02x failed, size %d, " |
| 124 | "err %d\n", addrdir >> 1, size, rc); |
| 125 | else |
| 126 | dev_err(&adap->dev, |
| 127 | "I2C transfer at 0x%02x failed, size %d, " |
| 128 | "err %d\n", addrdir >> 1, size, rc); |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 129 | goto bail; |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 130 | } |
Jean Delvare | 02864d5 | 2009-12-06 17:06:17 +0100 | [diff] [blame] | 131 | |
| 132 | if (size == I2C_SMBUS_WORD_DATA && read) { |
| 133 | data->word = ((u16)local[1]) << 8; |
| 134 | data->word |= local[0]; |
| 135 | } |
| 136 | |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 137 | bail: |
| 138 | pmac_i2c_close(bus); |
| 139 | return rc; |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * Generic i2c master transfer entrypoint. This driver only support single |
| 144 | * messages (for "lame i2c" transfers). Anything else should use the smbus |
| 145 | * entry point |
| 146 | */ |
| 147 | static int i2c_powermac_master_xfer( struct i2c_adapter *adap, |
| 148 | struct i2c_msg *msgs, |
| 149 | int num) |
| 150 | { |
| 151 | struct pmac_i2c_bus *bus = i2c_get_adapdata(adap); |
| 152 | int rc = 0; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 153 | int addrdir; |
| 154 | |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 155 | if (msgs->flags & I2C_M_TEN) |
| 156 | return -EINVAL; |
Wolfram Sang | 7756e1e | 2016-04-03 20:44:57 +0200 | [diff] [blame] | 157 | addrdir = i2c_8bit_addr_from_msg(msgs); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 158 | |
| 159 | rc = pmac_i2c_open(bus, 0); |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 160 | if (rc) { |
| 161 | dev_err(&adap->dev, "Failed to open I2C, err %d\n", rc); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 162 | return rc; |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 163 | } |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 164 | rc = pmac_i2c_setmode(bus, pmac_i2c_mode_std); |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 165 | if (rc) { |
| 166 | dev_err(&adap->dev, "Failed to set I2C mode %d, err %d\n", |
| 167 | pmac_i2c_mode_std, rc); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 168 | goto bail; |
Jean Delvare | d7d838a | 2009-12-06 17:06:18 +0100 | [diff] [blame] | 169 | } |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 170 | rc = pmac_i2c_xfer(bus, addrdir, 0, 0, msgs->buf, msgs->len); |
Jean Delvare | 8e4b980 | 2010-03-13 20:56:52 +0100 | [diff] [blame] | 171 | if (rc < 0) { |
| 172 | if (rc == -ENXIO) |
| 173 | dev_dbg(&adap->dev, "I2C %s 0x%02x failed, err %d\n", |
| 174 | addrdir & 1 ? "read from" : "write to", |
| 175 | addrdir >> 1, rc); |
| 176 | else |
| 177 | dev_err(&adap->dev, "I2C %s 0x%02x failed, err %d\n", |
| 178 | addrdir & 1 ? "read from" : "write to", |
| 179 | addrdir >> 1, rc); |
| 180 | } |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 181 | bail: |
| 182 | pmac_i2c_close(bus); |
Jean Delvare | 8ced8ee | 2006-07-01 17:12:53 +0200 | [diff] [blame] | 183 | return rc < 0 ? rc : 1; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | static u32 i2c_powermac_func(struct i2c_adapter * adapter) |
| 187 | { |
| 188 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | |
| 189 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
| 190 | I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_I2C; |
| 191 | } |
| 192 | |
| 193 | /* For now, we only handle smbus */ |
Jean Delvare | 8f9082c | 2006-09-03 22:39:46 +0200 | [diff] [blame] | 194 | static const struct i2c_algorithm i2c_powermac_algorithm = { |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 195 | .smbus_xfer = i2c_powermac_smbus_xfer, |
| 196 | .master_xfer = i2c_powermac_master_xfer, |
| 197 | .functionality = i2c_powermac_func, |
| 198 | }; |
| 199 | |
Wolfram Sang | 7ee405e | 2015-01-07 12:24:10 +0100 | [diff] [blame] | 200 | static struct i2c_adapter_quirks i2c_powermac_quirks = { |
| 201 | .max_num_msgs = 1, |
| 202 | }; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 203 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 204 | static int i2c_powermac_remove(struct platform_device *dev) |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 205 | { |
Benjamin Herrenschmidt | 9f2545c | 2006-10-10 11:45:45 +1000 | [diff] [blame] | 206 | struct i2c_adapter *adapter = platform_get_drvdata(dev); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 207 | |
Lars-Peter Clausen | bf51a8c | 2013-03-09 08:16:46 +0000 | [diff] [blame] | 208 | i2c_del_adapter(adapter); |
Jean Delvare | 6dfa5ca | 2009-12-06 17:06:19 +0100 | [diff] [blame] | 209 | memset(adapter, 0, sizeof(*adapter)); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 210 | |
| 211 | return 0; |
| 212 | } |
| 213 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 214 | static u32 i2c_powermac_get_addr(struct i2c_adapter *adap, |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 215 | struct pmac_i2c_bus *bus, |
| 216 | struct device_node *node) |
| 217 | { |
| 218 | const __be32 *prop; |
| 219 | int len; |
| 220 | |
| 221 | /* First check for valid "reg" */ |
| 222 | prop = of_get_property(node, "reg", &len); |
| 223 | if (prop && (len >= sizeof(int))) |
| 224 | return (be32_to_cpup(prop) & 0xff) >> 1; |
| 225 | |
| 226 | /* Then check old-style "i2c-address" */ |
| 227 | prop = of_get_property(node, "i2c-address", &len); |
| 228 | if (prop && (len >= sizeof(int))) |
| 229 | return (be32_to_cpup(prop) & 0xff) >> 1; |
| 230 | |
| 231 | /* Now handle some devices with missing "reg" properties */ |
| 232 | if (!strcmp(node->name, "cereal")) |
| 233 | return 0x60; |
| 234 | else if (!strcmp(node->name, "deq")) |
| 235 | return 0x34; |
| 236 | |
| 237 | dev_warn(&adap->dev, "No i2c address for %s\n", node->full_name); |
| 238 | |
| 239 | return 0xffffffff; |
| 240 | } |
| 241 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 242 | static void i2c_powermac_create_one(struct i2c_adapter *adap, |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 243 | const char *type, |
| 244 | u32 addr) |
| 245 | { |
| 246 | struct i2c_board_info info = {}; |
| 247 | struct i2c_client *newdev; |
| 248 | |
| 249 | strncpy(info.type, type, sizeof(info.type)); |
| 250 | info.addr = addr; |
| 251 | newdev = i2c_new_device(adap, &info); |
| 252 | if (!newdev) |
| 253 | dev_err(&adap->dev, |
| 254 | "i2c-powermac: Failure to register missing %s\n", |
| 255 | type); |
| 256 | } |
| 257 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 258 | static void i2c_powermac_add_missing(struct i2c_adapter *adap, |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 259 | struct pmac_i2c_bus *bus, |
| 260 | bool found_onyx) |
| 261 | { |
| 262 | struct device_node *busnode = pmac_i2c_get_bus_node(bus); |
| 263 | int rc; |
| 264 | |
| 265 | /* Check for the onyx audio codec */ |
| 266 | #define ONYX_REG_CONTROL 67 |
| 267 | if (of_device_is_compatible(busnode, "k2-i2c") && !found_onyx) { |
| 268 | union i2c_smbus_data data; |
| 269 | |
| 270 | rc = i2c_smbus_xfer(adap, 0x46, 0, I2C_SMBUS_READ, |
| 271 | ONYX_REG_CONTROL, I2C_SMBUS_BYTE_DATA, |
| 272 | &data); |
| 273 | if (rc >= 0) |
| 274 | i2c_powermac_create_one(adap, "MAC,pcm3052", 0x46); |
| 275 | |
| 276 | rc = i2c_smbus_xfer(adap, 0x47, 0, I2C_SMBUS_READ, |
| 277 | ONYX_REG_CONTROL, I2C_SMBUS_BYTE_DATA, |
| 278 | &data); |
| 279 | if (rc >= 0) |
| 280 | i2c_powermac_create_one(adap, "MAC,pcm3052", 0x47); |
| 281 | } |
| 282 | } |
| 283 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 284 | static bool i2c_powermac_get_type(struct i2c_adapter *adap, |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 285 | struct device_node *node, |
| 286 | u32 addr, char *type, int type_size) |
| 287 | { |
| 288 | char tmp[16]; |
| 289 | |
| 290 | /* Note: we to _NOT_ want the standard |
| 291 | * i2c drivers to match with any of our powermac stuff |
| 292 | * unless they have been specifically modified to handle |
| 293 | * it on a case by case basis. For example, for thermal |
| 294 | * control, things like lm75 etc... shall match with their |
| 295 | * corresponding windfarm drivers, _NOT_ the generic ones, |
| 296 | * so we force a prefix of AAPL, onto the modalias to |
| 297 | * make that happen |
| 298 | */ |
| 299 | |
| 300 | /* First try proper modalias */ |
| 301 | if (of_modalias_node(node, tmp, sizeof(tmp)) >= 0) { |
| 302 | snprintf(type, type_size, "MAC,%s", tmp); |
| 303 | return true; |
| 304 | } |
| 305 | |
| 306 | /* Now look for known workarounds */ |
| 307 | if (!strcmp(node->name, "deq")) { |
| 308 | /* Apple uses address 0x34 for TAS3001 and 0x35 for TAS3004 */ |
| 309 | if (addr == 0x34) { |
| 310 | snprintf(type, type_size, "MAC,tas3001"); |
| 311 | return true; |
| 312 | } else if (addr == 0x35) { |
| 313 | snprintf(type, type_size, "MAC,tas3004"); |
| 314 | return true; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | dev_err(&adap->dev, "i2c-powermac: modalias failure" |
| 319 | " on %s\n", node->full_name); |
| 320 | return false; |
| 321 | } |
| 322 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 323 | static void i2c_powermac_register_devices(struct i2c_adapter *adap, |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 324 | struct pmac_i2c_bus *bus) |
| 325 | { |
| 326 | struct i2c_client *newdev; |
| 327 | struct device_node *node; |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 328 | bool found_onyx = 0; |
| 329 | |
| 330 | /* |
| 331 | * In some cases we end up with the via-pmu node itself, in this |
| 332 | * case we skip this function completely as the device-tree will |
| 333 | * not contain anything useful. |
| 334 | */ |
| 335 | if (!strcmp(adap->dev.of_node->name, "via-pmu")) |
| 336 | return; |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 337 | |
| 338 | for_each_child_of_node(adap->dev.of_node, node) { |
| 339 | struct i2c_board_info info = {}; |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 340 | u32 addr; |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 341 | |
| 342 | /* Get address & channel */ |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 343 | addr = i2c_powermac_get_addr(adap, bus, node); |
| 344 | if (addr == 0xffffffff) |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 345 | continue; |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 346 | |
| 347 | /* Multibus setup, check channel */ |
| 348 | if (!pmac_i2c_match_adapter(node, adap)) |
| 349 | continue; |
| 350 | |
| 351 | dev_dbg(&adap->dev, "i2c-powermac: register %s\n", |
| 352 | node->full_name); |
| 353 | |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 354 | /* |
| 355 | * Keep track of some device existence to handle |
| 356 | * workarounds later. |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 357 | */ |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 358 | if (of_device_is_compatible(node, "pcm3052")) |
| 359 | found_onyx = true; |
| 360 | |
| 361 | /* Make up a modalias */ |
| 362 | if (!i2c_powermac_get_type(adap, node, addr, |
| 363 | info.type, sizeof(info.type))) { |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 364 | continue; |
| 365 | } |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 366 | |
| 367 | /* Fill out the rest of the info structure */ |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 368 | info.addr = addr; |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 369 | info.irq = irq_of_parse_and_map(node, 0); |
| 370 | info.of_node = of_node_get(node); |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 371 | |
| 372 | newdev = i2c_new_device(adap, &info); |
| 373 | if (!newdev) { |
| 374 | dev_err(&adap->dev, "i2c-powermac: Failure to register" |
| 375 | " %s\n", node->full_name); |
| 376 | of_node_put(node); |
| 377 | /* We do not dispose of the interrupt mapping on |
| 378 | * purpose. It's not necessary (interrupt cannot be |
| 379 | * re-used) and somebody else might have grabbed it |
| 380 | * via direct DT lookup so let's not bother |
| 381 | */ |
| 382 | continue; |
| 383 | } |
| 384 | } |
Benjamin Herrenschmidt | 3a3dd01 | 2012-06-18 12:00:50 +1000 | [diff] [blame] | 385 | |
| 386 | /* Additional workarounds */ |
| 387 | i2c_powermac_add_missing(adap, bus, found_onyx); |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 388 | } |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 389 | |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 390 | static int i2c_powermac_probe(struct platform_device *dev) |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 391 | { |
Jingoo Han | 6d4028c | 2013-07-30 16:59:33 +0900 | [diff] [blame] | 392 | struct pmac_i2c_bus *bus = dev_get_platdata(&dev->dev); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 393 | struct device_node *parent = NULL; |
| 394 | struct i2c_adapter *adapter; |
Jeremy Kerr | 018a3d1 | 2006-07-12 15:40:29 +1000 | [diff] [blame] | 395 | const char *basename; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 396 | int rc; |
| 397 | |
| 398 | if (bus == NULL) |
| 399 | return -EINVAL; |
Jean Delvare | bc6286e | 2009-12-06 17:06:20 +0100 | [diff] [blame] | 400 | adapter = pmac_i2c_get_adapter(bus); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 401 | |
| 402 | /* Ok, now we need to make up a name for the interface that will |
| 403 | * match what we used to do in the past, that is basically the |
| 404 | * controller's parent device node for keywest. PMU didn't have a |
| 405 | * naming convention and SMU has a different one |
| 406 | */ |
| 407 | switch(pmac_i2c_get_type(bus)) { |
| 408 | case pmac_i2c_bus_keywest: |
| 409 | parent = of_get_parent(pmac_i2c_get_controller(bus)); |
| 410 | if (parent == NULL) |
| 411 | return -EINVAL; |
| 412 | basename = parent->name; |
| 413 | break; |
| 414 | case pmac_i2c_bus_pmu: |
| 415 | basename = "pmu"; |
| 416 | break; |
| 417 | case pmac_i2c_bus_smu: |
| 418 | /* This is not what we used to do but I'm fixing drivers at |
| 419 | * the same time as this change |
| 420 | */ |
| 421 | basename = "smu"; |
| 422 | break; |
| 423 | default: |
| 424 | return -EINVAL; |
| 425 | } |
Jean Delvare | bc6286e | 2009-12-06 17:06:20 +0100 | [diff] [blame] | 426 | snprintf(adapter->name, sizeof(adapter->name), "%s %d", basename, |
| 427 | pmac_i2c_get_channel(bus)); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 428 | of_node_put(parent); |
| 429 | |
Benjamin Herrenschmidt | 9f2545c | 2006-10-10 11:45:45 +1000 | [diff] [blame] | 430 | platform_set_drvdata(dev, adapter); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 431 | adapter->algo = &i2c_powermac_algorithm; |
Wolfram Sang | 7ee405e | 2015-01-07 12:24:10 +0100 | [diff] [blame] | 432 | adapter->quirks = &i2c_powermac_quirks; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 433 | i2c_set_adapdata(adapter, bus); |
Benjamin Herrenschmidt | 9f2545c | 2006-10-10 11:45:45 +1000 | [diff] [blame] | 434 | adapter->dev.parent = &dev->dev; |
Wolfram Sang | 687b81d | 2013-07-11 12:56:15 +0100 | [diff] [blame] | 435 | |
| 436 | /* Clear of_node to skip automatic registration of i2c child nodes */ |
| 437 | adapter->dev.of_node = NULL; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 438 | rc = i2c_add_adapter(adapter); |
| 439 | if (rc) { |
| 440 | printk(KERN_ERR "i2c-powermac: Adapter %s registration " |
Jean Delvare | bc6286e | 2009-12-06 17:06:20 +0100 | [diff] [blame] | 441 | "failed\n", adapter->name); |
Jean Delvare | 6dfa5ca | 2009-12-06 17:06:19 +0100 | [diff] [blame] | 442 | memset(adapter, 0, sizeof(*adapter)); |
Wolfram Sang | 874e955 | 2013-07-11 22:02:03 +0100 | [diff] [blame] | 443 | return rc; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 444 | } |
| 445 | |
Jean Delvare | bc6286e | 2009-12-06 17:06:20 +0100 | [diff] [blame] | 446 | printk(KERN_INFO "PowerMac i2c bus %s registered\n", adapter->name); |
Jean Delvare | 810ad7b | 2008-10-17 17:51:12 +0200 | [diff] [blame] | 447 | |
Wolfram Sang | 687b81d | 2013-07-11 12:56:15 +0100 | [diff] [blame] | 448 | /* Use custom child registration due to Apple device-tree funkyness */ |
| 449 | adapter->dev.of_node = dev->dev.of_node; |
Benjamin Herrenschmidt | 81e5d86 | 2012-04-18 22:16:42 +0000 | [diff] [blame] | 450 | i2c_powermac_register_devices(adapter, bus); |
Jean Delvare | 810ad7b | 2008-10-17 17:51:12 +0200 | [diff] [blame] | 451 | |
Wolfram Sang | 874e955 | 2013-07-11 22:02:03 +0100 | [diff] [blame] | 452 | return 0; |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 453 | } |
| 454 | |
Benjamin Herrenschmidt | 9f2545c | 2006-10-10 11:45:45 +1000 | [diff] [blame] | 455 | static struct platform_driver i2c_powermac_driver = { |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 456 | .probe = i2c_powermac_probe, |
Bill Pemberton | 0b255e9 | 2012-11-27 15:59:38 -0500 | [diff] [blame] | 457 | .remove = i2c_powermac_remove, |
Benjamin Herrenschmidt | 9f2545c | 2006-10-10 11:45:45 +1000 | [diff] [blame] | 458 | .driver = { |
| 459 | .name = "i2c-powermac", |
| 460 | .bus = &platform_bus_type, |
| 461 | }, |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 462 | }; |
| 463 | |
Axel Lin | a3664b5 | 2012-01-12 20:32:04 +0100 | [diff] [blame] | 464 | module_platform_driver(i2c_powermac_driver); |
Benjamin Herrenschmidt | a28d3af | 2006-01-07 11:35:26 +1100 | [diff] [blame] | 465 | |
Axel Lin | a3664b5 | 2012-01-12 20:32:04 +0100 | [diff] [blame] | 466 | MODULE_ALIAS("platform:i2c-powermac"); |