Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * i2c-au1550.c: SMBus (i2c) adapter for Alchemy PSC interface |
| 3 | * Copyright (C) 2004 Embedded Edge, LLC <dan@embeddededge.com> |
| 4 | * |
| 5 | * 2.6 port by Matt Porter <mporter@kernel.crashing.org> |
| 6 | * |
| 7 | * The documentation describes this as an SMBus controller, but it doesn't |
| 8 | * understand any of the SMBus protocol in hardware. It's really an I2C |
| 9 | * controller that could emulate most of the SMBus in software. |
| 10 | * |
| 11 | * This is just a skeleton adapter to use with the Au1550 PSC |
| 12 | * algorithm. It was developed for the Pb1550, but will work with |
| 13 | * any Au1550 board that has a similar PSC configuration. |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License |
| 17 | * as published by the Free Software Foundation; either version 2 |
| 18 | * of the License, or (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/delay.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/module.h> |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 33 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/init.h> |
| 35 | #include <linux/errno.h> |
| 36 | #include <linux/i2c.h> |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 37 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Domen Puncer | a294de4 | 2006-08-13 23:37:13 +0200 | [diff] [blame] | 39 | #include <asm/mach-au1x00/au1xxx.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <asm/mach-au1x00/au1xxx_psc.h> |
| 41 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 42 | struct i2c_au1550_data { |
| 43 | u32 psc_base; |
| 44 | int xfer_timeout; |
| 45 | int ack_timeout; |
| 46 | struct i2c_adapter adap; |
| 47 | struct resource *ioarea; |
| 48 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | static int |
| 51 | wait_xfer_done(struct i2c_au1550_data *adap) |
| 52 | { |
| 53 | u32 stat; |
| 54 | int i; |
| 55 | volatile psc_smb_t *sp; |
| 56 | |
| 57 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 58 | |
Chris David | a202707 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 59 | /* Wait for Tx Buffer Empty |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | */ |
| 61 | for (i = 0; i < adap->xfer_timeout; i++) { |
Chris David | a202707 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 62 | stat = sp->psc_smbstat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | au_sync(); |
Chris David | a202707 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 64 | if ((stat & PSC_SMBSTAT_TE) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | return 0; |
Chris David | a202707 | 2007-10-13 23:56:33 +0200 | [diff] [blame] | 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | udelay(1); |
| 68 | } |
| 69 | |
| 70 | return -ETIMEDOUT; |
| 71 | } |
| 72 | |
| 73 | static int |
| 74 | wait_ack(struct i2c_au1550_data *adap) |
| 75 | { |
| 76 | u32 stat; |
| 77 | volatile psc_smb_t *sp; |
| 78 | |
| 79 | if (wait_xfer_done(adap)) |
| 80 | return -ETIMEDOUT; |
| 81 | |
| 82 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 83 | |
| 84 | stat = sp->psc_smbevnt; |
| 85 | au_sync(); |
| 86 | |
| 87 | if ((stat & (PSC_SMBEVNT_DN | PSC_SMBEVNT_AN | PSC_SMBEVNT_AL)) != 0) |
| 88 | return -ETIMEDOUT; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static int |
| 94 | wait_master_done(struct i2c_au1550_data *adap) |
| 95 | { |
| 96 | u32 stat; |
| 97 | int i; |
| 98 | volatile psc_smb_t *sp; |
| 99 | |
| 100 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 101 | |
| 102 | /* Wait for Master Done. |
| 103 | */ |
| 104 | for (i = 0; i < adap->xfer_timeout; i++) { |
| 105 | stat = sp->psc_smbevnt; |
| 106 | au_sync(); |
| 107 | if ((stat & PSC_SMBEVNT_MD) != 0) |
| 108 | return 0; |
| 109 | udelay(1); |
| 110 | } |
| 111 | |
| 112 | return -ETIMEDOUT; |
| 113 | } |
| 114 | |
| 115 | static int |
Manuel Lauss | 91f2795 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 116 | do_address(struct i2c_au1550_data *adap, unsigned int addr, int rd, int q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
| 118 | volatile psc_smb_t *sp; |
| 119 | u32 stat; |
| 120 | |
| 121 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 122 | |
| 123 | /* Reset the FIFOs, clear events. |
| 124 | */ |
Domen Puncer | 8859942 | 2006-08-13 23:35:40 +0200 | [diff] [blame] | 125 | stat = sp->psc_smbstat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | sp->psc_smbevnt = PSC_SMBEVNT_ALLCLR; |
| 127 | au_sync(); |
Domen Puncer | 8859942 | 2006-08-13 23:35:40 +0200 | [diff] [blame] | 128 | |
| 129 | if (!(stat & PSC_SMBSTAT_TE) || !(stat & PSC_SMBSTAT_RE)) { |
| 130 | sp->psc_smbpcr = PSC_SMBPCR_DC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | au_sync(); |
Domen Puncer | 8859942 | 2006-08-13 23:35:40 +0200 | [diff] [blame] | 132 | do { |
| 133 | stat = sp->psc_smbpcr; |
| 134 | au_sync(); |
| 135 | } while ((stat & PSC_SMBPCR_DC) != 0); |
| 136 | udelay(50); |
| 137 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | /* Write out the i2c chip address and specify operation |
| 140 | */ |
| 141 | addr <<= 1; |
| 142 | if (rd) |
| 143 | addr |= 1; |
| 144 | |
Manuel Lauss | 91f2795 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 145 | /* zero-byte xfers stop immediately */ |
| 146 | if (q) |
| 147 | addr |= PSC_SMBTXRX_STP; |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* Put byte into fifo, start up master. |
| 150 | */ |
| 151 | sp->psc_smbtxrx = addr; |
| 152 | au_sync(); |
| 153 | sp->psc_smbpcr = PSC_SMBPCR_MS; |
| 154 | au_sync(); |
| 155 | if (wait_ack(adap)) |
| 156 | return -EIO; |
Manuel Lauss | 91f2795 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 157 | return (q) ? wait_master_done(adap) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | static u32 |
| 161 | wait_for_rx_byte(struct i2c_au1550_data *adap, u32 *ret_data) |
| 162 | { |
| 163 | int j; |
| 164 | u32 data, stat; |
| 165 | volatile psc_smb_t *sp; |
| 166 | |
| 167 | if (wait_xfer_done(adap)) |
| 168 | return -EIO; |
| 169 | |
| 170 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 171 | |
| 172 | j = adap->xfer_timeout * 100; |
| 173 | do { |
| 174 | j--; |
| 175 | if (j <= 0) |
| 176 | return -EIO; |
| 177 | |
| 178 | stat = sp->psc_smbstat; |
| 179 | au_sync(); |
| 180 | if ((stat & PSC_SMBSTAT_RE) == 0) |
| 181 | j = 0; |
| 182 | else |
| 183 | udelay(1); |
| 184 | } while (j > 0); |
| 185 | data = sp->psc_smbtxrx; |
| 186 | au_sync(); |
| 187 | *ret_data = data; |
| 188 | |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | static int |
| 193 | i2c_read(struct i2c_au1550_data *adap, unsigned char *buf, |
| 194 | unsigned int len) |
| 195 | { |
| 196 | int i; |
| 197 | u32 data; |
| 198 | volatile psc_smb_t *sp; |
| 199 | |
| 200 | if (len == 0) |
| 201 | return 0; |
| 202 | |
| 203 | /* A read is performed by stuffing the transmit fifo with |
| 204 | * zero bytes for timing, waiting for bytes to appear in the |
| 205 | * receive fifo, then reading the bytes. |
| 206 | */ |
| 207 | |
| 208 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 209 | |
| 210 | i = 0; |
| 211 | while (i < (len-1)) { |
| 212 | sp->psc_smbtxrx = 0; |
| 213 | au_sync(); |
| 214 | if (wait_for_rx_byte(adap, &data)) |
| 215 | return -EIO; |
| 216 | |
| 217 | buf[i] = data; |
| 218 | i++; |
| 219 | } |
| 220 | |
| 221 | /* The last byte has to indicate transfer done. |
| 222 | */ |
| 223 | sp->psc_smbtxrx = PSC_SMBTXRX_STP; |
| 224 | au_sync(); |
| 225 | if (wait_master_done(adap)) |
| 226 | return -EIO; |
| 227 | |
| 228 | data = sp->psc_smbtxrx; |
| 229 | au_sync(); |
| 230 | buf[i] = data; |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static int |
| 235 | i2c_write(struct i2c_au1550_data *adap, unsigned char *buf, |
| 236 | unsigned int len) |
| 237 | { |
| 238 | int i; |
| 239 | u32 data; |
| 240 | volatile psc_smb_t *sp; |
| 241 | |
| 242 | if (len == 0) |
| 243 | return 0; |
| 244 | |
| 245 | sp = (volatile psc_smb_t *)(adap->psc_base); |
| 246 | |
| 247 | i = 0; |
| 248 | while (i < (len-1)) { |
| 249 | data = buf[i]; |
| 250 | sp->psc_smbtxrx = data; |
| 251 | au_sync(); |
| 252 | if (wait_ack(adap)) |
| 253 | return -EIO; |
| 254 | i++; |
| 255 | } |
| 256 | |
| 257 | /* The last byte has to indicate transfer done. |
| 258 | */ |
| 259 | data = buf[i]; |
| 260 | data |= PSC_SMBTXRX_STP; |
| 261 | sp->psc_smbtxrx = data; |
| 262 | au_sync(); |
| 263 | if (wait_master_done(adap)) |
| 264 | return -EIO; |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | static int |
| 269 | au1550_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) |
| 270 | { |
| 271 | struct i2c_au1550_data *adap = i2c_adap->algo_data; |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 272 | volatile psc_smb_t *sp = (volatile psc_smb_t *)adap->psc_base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | struct i2c_msg *p; |
| 274 | int i, err = 0; |
| 275 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 276 | sp->psc_ctrl = PSC_CTRL_ENABLE; |
| 277 | au_sync(); |
| 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | for (i = 0; !err && i < num; i++) { |
| 280 | p = &msgs[i]; |
Manuel Lauss | 91f2795 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 281 | err = do_address(adap, p->addr, p->flags & I2C_M_RD, |
| 282 | (p->len == 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if (err || !p->len) |
| 284 | continue; |
| 285 | if (p->flags & I2C_M_RD) |
| 286 | err = i2c_read(adap, p->buf, p->len); |
| 287 | else |
| 288 | err = i2c_write(adap, p->buf, p->len); |
| 289 | } |
| 290 | |
| 291 | /* Return the number of messages processed, or the error code. |
| 292 | */ |
| 293 | if (err == 0) |
| 294 | err = num; |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 295 | |
| 296 | sp->psc_ctrl = PSC_CTRL_SUSPEND; |
| 297 | au_sync(); |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return err; |
| 300 | } |
| 301 | |
| 302 | static u32 |
| 303 | au1550_func(struct i2c_adapter *adap) |
| 304 | { |
Domen Puncer | 6ed0713 | 2006-08-13 23:36:27 +0200 | [diff] [blame] | 305 | return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Jean Delvare | 8f9082c | 2006-09-03 22:39:46 +0200 | [diff] [blame] | 308 | static const struct i2c_algorithm au1550_algo = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | .master_xfer = au1550_xfer, |
| 310 | .functionality = au1550_func, |
| 311 | }; |
| 312 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 313 | static void i2c_au1550_setup(struct i2c_au1550_data *priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 315 | volatile psc_smb_t *sp = (volatile psc_smb_t *)priv->psc_base; |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 316 | u32 stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | sp->psc_ctrl = PSC_CTRL_DISABLE; |
| 319 | au_sync(); |
| 320 | sp->psc_sel = PSC_SEL_PS_SMBUSMODE; |
| 321 | sp->psc_smbcfg = 0; |
| 322 | au_sync(); |
| 323 | sp->psc_ctrl = PSC_CTRL_ENABLE; |
| 324 | au_sync(); |
| 325 | do { |
| 326 | stat = sp->psc_smbstat; |
| 327 | au_sync(); |
| 328 | } while ((stat & PSC_SMBSTAT_SR) == 0); |
| 329 | |
| 330 | sp->psc_smbcfg = (PSC_SMBCFG_RT_FIFO8 | PSC_SMBCFG_TT_FIFO8 | |
| 331 | PSC_SMBCFG_DD_DISABLE); |
| 332 | |
| 333 | /* Divide by 8 to get a 6.25 MHz clock. The later protocol |
| 334 | * timings are based on this clock. |
| 335 | */ |
| 336 | sp->psc_smbcfg |= PSC_SMBCFG_SET_DIV(PSC_SMBCFG_DIV8); |
| 337 | sp->psc_smbmsk = PSC_SMBMSK_ALLMASK; |
| 338 | au_sync(); |
| 339 | |
| 340 | /* Set the protocol timer values. See Table 71 in the |
| 341 | * Au1550 Data Book for standard timing values. |
| 342 | */ |
| 343 | sp->psc_smbtmr = PSC_SMBTMR_SET_TH(0) | PSC_SMBTMR_SET_PS(15) | \ |
| 344 | PSC_SMBTMR_SET_PU(15) | PSC_SMBTMR_SET_SH(15) | \ |
| 345 | PSC_SMBTMR_SET_SU(15) | PSC_SMBTMR_SET_CL(15) | \ |
| 346 | PSC_SMBTMR_SET_CH(15); |
| 347 | au_sync(); |
| 348 | |
| 349 | sp->psc_smbcfg |= PSC_SMBCFG_DE_ENABLE; |
| 350 | do { |
| 351 | stat = sp->psc_smbstat; |
| 352 | au_sync(); |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 353 | } while ((stat & PSC_SMBSTAT_SR) == 0); |
| 354 | |
| 355 | sp->psc_ctrl = PSC_CTRL_SUSPEND; |
| 356 | au_sync(); |
| 357 | } |
| 358 | |
| 359 | static void i2c_au1550_disable(struct i2c_au1550_data *priv) |
| 360 | { |
| 361 | volatile psc_smb_t *sp = (volatile psc_smb_t *)priv->psc_base; |
| 362 | |
| 363 | sp->psc_smbcfg = 0; |
| 364 | sp->psc_ctrl = PSC_CTRL_DISABLE; |
| 365 | au_sync(); |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * registering functions to load algorithms at runtime |
| 370 | * Prior to calling us, the 50MHz clock frequency and routing |
| 371 | * must have been set up for the PSC indicated by the adapter. |
| 372 | */ |
| 373 | static int __devinit |
| 374 | i2c_au1550_probe(struct platform_device *pdev) |
| 375 | { |
| 376 | struct i2c_au1550_data *priv; |
| 377 | struct resource *r; |
| 378 | int ret; |
| 379 | |
| 380 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 381 | if (!r) { |
| 382 | ret = -ENODEV; |
| 383 | goto out; |
| 384 | } |
| 385 | |
| 386 | priv = kzalloc(sizeof(struct i2c_au1550_data), GFP_KERNEL); |
| 387 | if (!priv) { |
| 388 | ret = -ENOMEM; |
| 389 | goto out; |
| 390 | } |
| 391 | |
| 392 | priv->ioarea = request_mem_region(r->start, r->end - r->start + 1, |
| 393 | pdev->name); |
| 394 | if (!priv->ioarea) { |
| 395 | ret = -EBUSY; |
| 396 | goto out_mem; |
| 397 | } |
| 398 | |
| 399 | priv->psc_base = CKSEG1ADDR(r->start); |
| 400 | priv->xfer_timeout = 200; |
| 401 | priv->ack_timeout = 200; |
| 402 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 403 | priv->adap.nr = pdev->id; |
| 404 | priv->adap.algo = &au1550_algo; |
| 405 | priv->adap.algo_data = priv; |
| 406 | priv->adap.dev.parent = &pdev->dev; |
| 407 | strlcpy(priv->adap.name, "Au1xxx PSC I2C", sizeof(priv->adap.name)); |
| 408 | |
| 409 | /* Now, set up the PSC for SMBus PIO mode. |
| 410 | */ |
| 411 | i2c_au1550_setup(priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 413 | ret = i2c_add_numbered_adapter(&priv->adap); |
| 414 | if (ret == 0) { |
| 415 | platform_set_drvdata(pdev, priv); |
| 416 | return 0; |
| 417 | } |
| 418 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 419 | i2c_au1550_disable(priv); |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 420 | |
| 421 | release_resource(priv->ioarea); |
| 422 | kfree(priv->ioarea); |
| 423 | out_mem: |
| 424 | kfree(priv); |
| 425 | out: |
| 426 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 429 | static int __devexit |
| 430 | i2c_au1550_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | { |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 432 | struct i2c_au1550_data *priv = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 434 | platform_set_drvdata(pdev, NULL); |
| 435 | i2c_del_adapter(&priv->adap); |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 436 | i2c_au1550_disable(priv); |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 437 | release_resource(priv->ioarea); |
| 438 | kfree(priv->ioarea); |
| 439 | kfree(priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | return 0; |
| 441 | } |
| 442 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 443 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | static int |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 445 | i2c_au1550_suspend(struct platform_device *pdev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | { |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 447 | struct i2c_au1550_data *priv = platform_get_drvdata(pdev); |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 448 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 449 | i2c_au1550_disable(priv); |
| 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | return 0; |
| 452 | } |
| 453 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 454 | static int |
| 455 | i2c_au1550_resume(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | { |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 457 | struct i2c_au1550_data *priv = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 459 | i2c_au1550_setup(priv); |
| 460 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 461 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } |
Manuel Lauss | f09f71b | 2008-07-14 22:38:34 +0200 | [diff] [blame] | 463 | #else |
| 464 | #define i2c_au1550_suspend NULL |
| 465 | #define i2c_au1550_resume NULL |
| 466 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 468 | static struct platform_driver au1xpsc_smbus_driver = { |
| 469 | .driver = { |
| 470 | .name = "au1xpsc_smbus", |
| 471 | .owner = THIS_MODULE, |
| 472 | }, |
| 473 | .probe = i2c_au1550_probe, |
| 474 | .remove = __devexit_p(i2c_au1550_remove), |
| 475 | .suspend = i2c_au1550_suspend, |
| 476 | .resume = i2c_au1550_resume, |
| 477 | }; |
| 478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | static int __init |
| 480 | i2c_au1550_init(void) |
| 481 | { |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 482 | return platform_driver_register(&au1xpsc_smbus_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | static void __exit |
| 486 | i2c_au1550_exit(void) |
| 487 | { |
Manuel Lauss | 8b798c4 | 2008-01-27 18:14:52 +0100 | [diff] [blame] | 488 | platform_driver_unregister(&au1xpsc_smbus_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | MODULE_AUTHOR("Dan Malek, Embedded Edge, LLC."); |
| 492 | MODULE_DESCRIPTION("SMBus adapter Alchemy pb1550"); |
| 493 | MODULE_LICENSE("GPL"); |
Kay Sievers | add8eda | 2008-04-22 22:16:49 +0200 | [diff] [blame] | 494 | MODULE_ALIAS("platform:au1xpsc_smbus"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
| 496 | module_init (i2c_au1550_init); |
| 497 | module_exit (i2c_au1550_exit); |