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Merge tag 'nfs-for-4.9-2' of git://git.linux-nfs.org/projects/anna/linux-nfs
[mirror_ubuntu-bionic-kernel.git] / drivers / i2c / busses / i2c-i801.c
1 /*
2 Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
3 Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker
4 <mdsxyz123@yahoo.com>
5 Copyright (C) 2007 - 2014 Jean Delvare <jdelvare@suse.de>
6 Copyright (C) 2010 Intel Corporation,
7 David Woodhouse <dwmw2@infradead.org>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18 */
19
20 /*
21 * Supports the following Intel I/O Controller Hubs (ICH):
22 *
23 * I/O Block I2C
24 * region SMBus Block proc. block
25 * Chip name PCI ID size PEC buffer call read
26 * ---------------------------------------------------------------------------
27 * 82801AA (ICH) 0x2413 16 no no no no
28 * 82801AB (ICH0) 0x2423 16 no no no no
29 * 82801BA (ICH2) 0x2443 16 no no no no
30 * 82801CA (ICH3) 0x2483 32 soft no no no
31 * 82801DB (ICH4) 0x24c3 32 hard yes no no
32 * 82801E (ICH5) 0x24d3 32 hard yes yes yes
33 * 6300ESB 0x25a4 32 hard yes yes yes
34 * 82801F (ICH6) 0x266a 32 hard yes yes yes
35 * 6310ESB/6320ESB 0x269b 32 hard yes yes yes
36 * 82801G (ICH7) 0x27da 32 hard yes yes yes
37 * 82801H (ICH8) 0x283e 32 hard yes yes yes
38 * 82801I (ICH9) 0x2930 32 hard yes yes yes
39 * EP80579 (Tolapai) 0x5032 32 hard yes yes yes
40 * ICH10 0x3a30 32 hard yes yes yes
41 * ICH10 0x3a60 32 hard yes yes yes
42 * 5/3400 Series (PCH) 0x3b30 32 hard yes yes yes
43 * 6 Series (PCH) 0x1c22 32 hard yes yes yes
44 * Patsburg (PCH) 0x1d22 32 hard yes yes yes
45 * Patsburg (PCH) IDF 0x1d70 32 hard yes yes yes
46 * Patsburg (PCH) IDF 0x1d71 32 hard yes yes yes
47 * Patsburg (PCH) IDF 0x1d72 32 hard yes yes yes
48 * DH89xxCC (PCH) 0x2330 32 hard yes yes yes
49 * Panther Point (PCH) 0x1e22 32 hard yes yes yes
50 * Lynx Point (PCH) 0x8c22 32 hard yes yes yes
51 * Lynx Point-LP (PCH) 0x9c22 32 hard yes yes yes
52 * Avoton (SOC) 0x1f3c 32 hard yes yes yes
53 * Wellsburg (PCH) 0x8d22 32 hard yes yes yes
54 * Wellsburg (PCH) MS 0x8d7d 32 hard yes yes yes
55 * Wellsburg (PCH) MS 0x8d7e 32 hard yes yes yes
56 * Wellsburg (PCH) MS 0x8d7f 32 hard yes yes yes
57 * Coleto Creek (PCH) 0x23b0 32 hard yes yes yes
58 * Wildcat Point (PCH) 0x8ca2 32 hard yes yes yes
59 * Wildcat Point-LP (PCH) 0x9ca2 32 hard yes yes yes
60 * BayTrail (SOC) 0x0f12 32 hard yes yes yes
61 * Sunrise Point-H (PCH) 0xa123 32 hard yes yes yes
62 * Sunrise Point-LP (PCH) 0x9d23 32 hard yes yes yes
63 * DNV (SOC) 0x19df 32 hard yes yes yes
64 * Broxton (SOC) 0x5ad4 32 hard yes yes yes
65 * Lewisburg (PCH) 0xa1a3 32 hard yes yes yes
66 * Lewisburg Supersku (PCH) 0xa223 32 hard yes yes yes
67 * Kaby Lake PCH-H (PCH) 0xa2a3 32 hard yes yes yes
68 *
69 * Features supported by this driver:
70 * Software PEC no
71 * Hardware PEC yes
72 * Block buffer yes
73 * Block process call transaction no
74 * I2C block read transaction yes (doesn't use the block buffer)
75 * Slave mode no
76 * SMBus Host Notify yes
77 * Interrupt processing yes
78 *
79 * See the file Documentation/i2c/busses/i2c-i801 for details.
80 */
81
82 #include <linux/interrupt.h>
83 #include <linux/module.h>
84 #include <linux/pci.h>
85 #include <linux/kernel.h>
86 #include <linux/stddef.h>
87 #include <linux/delay.h>
88 #include <linux/ioport.h>
89 #include <linux/init.h>
90 #include <linux/i2c.h>
91 #include <linux/i2c-smbus.h>
92 #include <linux/acpi.h>
93 #include <linux/io.h>
94 #include <linux/dmi.h>
95 #include <linux/slab.h>
96 #include <linux/wait.h>
97 #include <linux/err.h>
98 #include <linux/platform_device.h>
99 #include <linux/platform_data/itco_wdt.h>
100 #include <linux/pm_runtime.h>
101
102 #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
103 #include <linux/gpio.h>
104 #include <linux/i2c-mux-gpio.h>
105 #endif
106
107 /* I801 SMBus address offsets */
108 #define SMBHSTSTS(p) (0 + (p)->smba)
109 #define SMBHSTCNT(p) (2 + (p)->smba)
110 #define SMBHSTCMD(p) (3 + (p)->smba)
111 #define SMBHSTADD(p) (4 + (p)->smba)
112 #define SMBHSTDAT0(p) (5 + (p)->smba)
113 #define SMBHSTDAT1(p) (6 + (p)->smba)
114 #define SMBBLKDAT(p) (7 + (p)->smba)
115 #define SMBPEC(p) (8 + (p)->smba) /* ICH3 and later */
116 #define SMBAUXSTS(p) (12 + (p)->smba) /* ICH4 and later */
117 #define SMBAUXCTL(p) (13 + (p)->smba) /* ICH4 and later */
118 #define SMBSLVSTS(p) (16 + (p)->smba) /* ICH3 and later */
119 #define SMBSLVCMD(p) (17 + (p)->smba) /* ICH3 and later */
120 #define SMBNTFDADD(p) (20 + (p)->smba) /* ICH3 and later */
121 #define SMBNTFDDAT(p) (22 + (p)->smba) /* ICH3 and later */
122
123 /* PCI Address Constants */
124 #define SMBBAR 4
125 #define SMBPCICTL 0x004
126 #define SMBPCISTS 0x006
127 #define SMBHSTCFG 0x040
128 #define TCOBASE 0x050
129 #define TCOCTL 0x054
130
131 #define ACPIBASE 0x040
132 #define ACPIBASE_SMI_OFF 0x030
133 #define ACPICTRL 0x044
134 #define ACPICTRL_EN 0x080
135
136 #define SBREG_BAR 0x10
137 #define SBREG_SMBCTRL 0xc6000c
138
139 /* Host status bits for SMBPCISTS */
140 #define SMBPCISTS_INTS 0x08
141
142 /* Control bits for SMBPCICTL */
143 #define SMBPCICTL_INTDIS 0x0400
144
145 /* Host configuration bits for SMBHSTCFG */
146 #define SMBHSTCFG_HST_EN 1
147 #define SMBHSTCFG_SMB_SMI_EN 2
148 #define SMBHSTCFG_I2C_EN 4
149
150 /* TCO configuration bits for TCOCTL */
151 #define TCOCTL_EN 0x0100
152
153 /* Auxiliary status register bits, ICH4+ only */
154 #define SMBAUXSTS_CRCE 1
155 #define SMBAUXSTS_STCO 2
156
157 /* Auxiliary control register bits, ICH4+ only */
158 #define SMBAUXCTL_CRC 1
159 #define SMBAUXCTL_E32B 2
160
161 /* Other settings */
162 #define MAX_RETRIES 400
163
164 /* I801 command constants */
165 #define I801_QUICK 0x00
166 #define I801_BYTE 0x04
167 #define I801_BYTE_DATA 0x08
168 #define I801_WORD_DATA 0x0C
169 #define I801_PROC_CALL 0x10 /* unimplemented */
170 #define I801_BLOCK_DATA 0x14
171 #define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */
172
173 /* I801 Host Control register bits */
174 #define SMBHSTCNT_INTREN 0x01
175 #define SMBHSTCNT_KILL 0x02
176 #define SMBHSTCNT_LAST_BYTE 0x20
177 #define SMBHSTCNT_START 0x40
178 #define SMBHSTCNT_PEC_EN 0x80 /* ICH3 and later */
179
180 /* I801 Hosts Status register bits */
181 #define SMBHSTSTS_BYTE_DONE 0x80
182 #define SMBHSTSTS_INUSE_STS 0x40
183 #define SMBHSTSTS_SMBALERT_STS 0x20
184 #define SMBHSTSTS_FAILED 0x10
185 #define SMBHSTSTS_BUS_ERR 0x08
186 #define SMBHSTSTS_DEV_ERR 0x04
187 #define SMBHSTSTS_INTR 0x02
188 #define SMBHSTSTS_HOST_BUSY 0x01
189
190 /* Host Notify Status registers bits */
191 #define SMBSLVSTS_HST_NTFY_STS 1
192
193 /* Host Notify Command registers bits */
194 #define SMBSLVCMD_HST_NTFY_INTREN 0x01
195
196 #define STATUS_ERROR_FLAGS (SMBHSTSTS_FAILED | SMBHSTSTS_BUS_ERR | \
197 SMBHSTSTS_DEV_ERR)
198
199 #define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR | \
200 STATUS_ERROR_FLAGS)
201
202 /* Older devices have their ID defined in <linux/pci_ids.h> */
203 #define PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS 0x0f12
204 #define PCI_DEVICE_ID_INTEL_DNV_SMBUS 0x19df
205 #define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS 0x1c22
206 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS 0x1d22
207 /* Patsburg also has three 'Integrated Device Function' SMBus controllers */
208 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0 0x1d70
209 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1 0x1d71
210 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2 0x1d72
211 #define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS 0x1e22
212 #define PCI_DEVICE_ID_INTEL_AVOTON_SMBUS 0x1f3c
213 #define PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS 0x2292
214 #define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330
215 #define PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS 0x23b0
216 #define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30
217 #define PCI_DEVICE_ID_INTEL_BROXTON_SMBUS 0x5ad4
218 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22
219 #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_SMBUS 0x8ca2
220 #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS 0x8d22
221 #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0 0x8d7d
222 #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1 0x8d7e
223 #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2 0x8d7f
224 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS 0x9c22
225 #define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS 0x9ca2
226 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS 0x9d23
227 #define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS 0xa123
228 #define PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS 0xa1a3
229 #define PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS 0xa223
230 #define PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS 0xa2a3
231
232 struct i801_mux_config {
233 char *gpio_chip;
234 unsigned values[3];
235 int n_values;
236 unsigned classes[3];
237 unsigned gpios[2]; /* Relative to gpio_chip->base */
238 int n_gpios;
239 };
240
241 struct i801_priv {
242 struct i2c_adapter adapter;
243 unsigned long smba;
244 unsigned char original_hstcfg;
245 struct pci_dev *pci_dev;
246 unsigned int features;
247
248 /* isr processing */
249 wait_queue_head_t waitq;
250 u8 status;
251
252 /* Command state used by isr for byte-by-byte block transactions */
253 u8 cmd;
254 bool is_read;
255 int count;
256 int len;
257 u8 *data;
258
259 #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
260 const struct i801_mux_config *mux_drvdata;
261 struct platform_device *mux_pdev;
262 #endif
263 struct platform_device *tco_pdev;
264
265 /*
266 * If set to true the host controller registers are reserved for
267 * ACPI AML use. Protected by acpi_lock.
268 */
269 bool acpi_reserved;
270 struct mutex acpi_lock;
271 struct smbus_host_notify *host_notify;
272 };
273
274 #define SMBHSTNTFY_SIZE 8
275
276 #define FEATURE_SMBUS_PEC (1 << 0)
277 #define FEATURE_BLOCK_BUFFER (1 << 1)
278 #define FEATURE_BLOCK_PROC (1 << 2)
279 #define FEATURE_I2C_BLOCK_READ (1 << 3)
280 #define FEATURE_IRQ (1 << 4)
281 #define FEATURE_HOST_NOTIFY (1 << 5)
282 /* Not really a feature, but it's convenient to handle it as such */
283 #define FEATURE_IDF (1 << 15)
284 #define FEATURE_TCO (1 << 16)
285
286 static const char *i801_feature_names[] = {
287 "SMBus PEC",
288 "Block buffer",
289 "Block process call",
290 "I2C block read",
291 "Interrupt",
292 "SMBus Host Notify",
293 };
294
295 static unsigned int disable_features;
296 module_param(disable_features, uint, S_IRUGO | S_IWUSR);
297 MODULE_PARM_DESC(disable_features, "Disable selected driver features:\n"
298 "\t\t 0x01 disable SMBus PEC\n"
299 "\t\t 0x02 disable the block buffer\n"
300 "\t\t 0x08 disable the I2C block read functionality\n"
301 "\t\t 0x10 don't use interrupts\n"
302 "\t\t 0x20 disable SMBus Host Notify ");
303
304 /* Make sure the SMBus host is ready to start transmitting.
305 Return 0 if it is, -EBUSY if it is not. */
306 static int i801_check_pre(struct i801_priv *priv)
307 {
308 int status;
309
310 status = inb_p(SMBHSTSTS(priv));
311 if (status & SMBHSTSTS_HOST_BUSY) {
312 dev_err(&priv->pci_dev->dev, "SMBus is busy, can't use it!\n");
313 return -EBUSY;
314 }
315
316 status &= STATUS_FLAGS;
317 if (status) {
318 dev_dbg(&priv->pci_dev->dev, "Clearing status flags (%02x)\n",
319 status);
320 outb_p(status, SMBHSTSTS(priv));
321 status = inb_p(SMBHSTSTS(priv)) & STATUS_FLAGS;
322 if (status) {
323 dev_err(&priv->pci_dev->dev,
324 "Failed clearing status flags (%02x)\n",
325 status);
326 return -EBUSY;
327 }
328 }
329
330 /*
331 * Clear CRC status if needed.
332 * During normal operation, i801_check_post() takes care
333 * of it after every operation. We do it here only in case
334 * the hardware was already in this state when the driver
335 * started.
336 */
337 if (priv->features & FEATURE_SMBUS_PEC) {
338 status = inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE;
339 if (status) {
340 dev_dbg(&priv->pci_dev->dev,
341 "Clearing aux status flags (%02x)\n", status);
342 outb_p(status, SMBAUXSTS(priv));
343 status = inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE;
344 if (status) {
345 dev_err(&priv->pci_dev->dev,
346 "Failed clearing aux status flags (%02x)\n",
347 status);
348 return -EBUSY;
349 }
350 }
351 }
352
353 return 0;
354 }
355
356 /*
357 * Convert the status register to an error code, and clear it.
358 * Note that status only contains the bits we want to clear, not the
359 * actual register value.
360 */
361 static int i801_check_post(struct i801_priv *priv, int status)
362 {
363 int result = 0;
364
365 /*
366 * If the SMBus is still busy, we give up
367 * Note: This timeout condition only happens when using polling
368 * transactions. For interrupt operation, NAK/timeout is indicated by
369 * DEV_ERR.
370 */
371 if (unlikely(status < 0)) {
372 dev_err(&priv->pci_dev->dev, "Transaction timeout\n");
373 /* try to stop the current command */
374 dev_dbg(&priv->pci_dev->dev, "Terminating the current operation\n");
375 outb_p(inb_p(SMBHSTCNT(priv)) | SMBHSTCNT_KILL,
376 SMBHSTCNT(priv));
377 usleep_range(1000, 2000);
378 outb_p(inb_p(SMBHSTCNT(priv)) & (~SMBHSTCNT_KILL),
379 SMBHSTCNT(priv));
380
381 /* Check if it worked */
382 status = inb_p(SMBHSTSTS(priv));
383 if ((status & SMBHSTSTS_HOST_BUSY) ||
384 !(status & SMBHSTSTS_FAILED))
385 dev_err(&priv->pci_dev->dev,
386 "Failed terminating the transaction\n");
387 outb_p(STATUS_FLAGS, SMBHSTSTS(priv));
388 return -ETIMEDOUT;
389 }
390
391 if (status & SMBHSTSTS_FAILED) {
392 result = -EIO;
393 dev_err(&priv->pci_dev->dev, "Transaction failed\n");
394 }
395 if (status & SMBHSTSTS_DEV_ERR) {
396 /*
397 * This may be a PEC error, check and clear it.
398 *
399 * AUXSTS is handled differently from HSTSTS.
400 * For HSTSTS, i801_isr() or i801_wait_intr()
401 * has already cleared the error bits in hardware,
402 * and we are passed a copy of the original value
403 * in "status".
404 * For AUXSTS, the hardware register is left
405 * for us to handle here.
406 * This is asymmetric, slightly iffy, but safe,
407 * since all this code is serialized and the CRCE
408 * bit is harmless as long as it's cleared before
409 * the next operation.
410 */
411 if ((priv->features & FEATURE_SMBUS_PEC) &&
412 (inb_p(SMBAUXSTS(priv)) & SMBAUXSTS_CRCE)) {
413 outb_p(SMBAUXSTS_CRCE, SMBAUXSTS(priv));
414 result = -EBADMSG;
415 dev_dbg(&priv->pci_dev->dev, "PEC error\n");
416 } else {
417 result = -ENXIO;
418 dev_dbg(&priv->pci_dev->dev, "No response\n");
419 }
420 }
421 if (status & SMBHSTSTS_BUS_ERR) {
422 result = -EAGAIN;
423 dev_dbg(&priv->pci_dev->dev, "Lost arbitration\n");
424 }
425
426 /* Clear status flags except BYTE_DONE, to be cleared by caller */
427 outb_p(status, SMBHSTSTS(priv));
428
429 return result;
430 }
431
432 /* Wait for BUSY being cleared and either INTR or an error flag being set */
433 static int i801_wait_intr(struct i801_priv *priv)
434 {
435 int timeout = 0;
436 int status;
437
438 /* We will always wait for a fraction of a second! */
439 do {
440 usleep_range(250, 500);
441 status = inb_p(SMBHSTSTS(priv));
442 } while (((status & SMBHSTSTS_HOST_BUSY) ||
443 !(status & (STATUS_ERROR_FLAGS | SMBHSTSTS_INTR))) &&
444 (timeout++ < MAX_RETRIES));
445
446 if (timeout > MAX_RETRIES) {
447 dev_dbg(&priv->pci_dev->dev, "INTR Timeout!\n");
448 return -ETIMEDOUT;
449 }
450 return status & (STATUS_ERROR_FLAGS | SMBHSTSTS_INTR);
451 }
452
453 /* Wait for either BYTE_DONE or an error flag being set */
454 static int i801_wait_byte_done(struct i801_priv *priv)
455 {
456 int timeout = 0;
457 int status;
458
459 /* We will always wait for a fraction of a second! */
460 do {
461 usleep_range(250, 500);
462 status = inb_p(SMBHSTSTS(priv));
463 } while (!(status & (STATUS_ERROR_FLAGS | SMBHSTSTS_BYTE_DONE)) &&
464 (timeout++ < MAX_RETRIES));
465
466 if (timeout > MAX_RETRIES) {
467 dev_dbg(&priv->pci_dev->dev, "BYTE_DONE Timeout!\n");
468 return -ETIMEDOUT;
469 }
470 return status & STATUS_ERROR_FLAGS;
471 }
472
473 static int i801_transaction(struct i801_priv *priv, int xact)
474 {
475 int status;
476 int result;
477 const struct i2c_adapter *adap = &priv->adapter;
478
479 result = i801_check_pre(priv);
480 if (result < 0)
481 return result;
482
483 if (priv->features & FEATURE_IRQ) {
484 outb_p(xact | SMBHSTCNT_INTREN | SMBHSTCNT_START,
485 SMBHSTCNT(priv));
486 result = wait_event_timeout(priv->waitq,
487 (status = priv->status),
488 adap->timeout);
489 if (!result) {
490 status = -ETIMEDOUT;
491 dev_warn(&priv->pci_dev->dev,
492 "Timeout waiting for interrupt!\n");
493 }
494 priv->status = 0;
495 return i801_check_post(priv, status);
496 }
497
498 /* the current contents of SMBHSTCNT can be overwritten, since PEC,
499 * SMBSCMD are passed in xact */
500 outb_p(xact | SMBHSTCNT_START, SMBHSTCNT(priv));
501
502 status = i801_wait_intr(priv);
503 return i801_check_post(priv, status);
504 }
505
506 static int i801_block_transaction_by_block(struct i801_priv *priv,
507 union i2c_smbus_data *data,
508 char read_write, int hwpec)
509 {
510 int i, len;
511 int status;
512
513 inb_p(SMBHSTCNT(priv)); /* reset the data buffer index */
514
515 /* Use 32-byte buffer to process this transaction */
516 if (read_write == I2C_SMBUS_WRITE) {
517 len = data->block[0];
518 outb_p(len, SMBHSTDAT0(priv));
519 for (i = 0; i < len; i++)
520 outb_p(data->block[i+1], SMBBLKDAT(priv));
521 }
522
523 status = i801_transaction(priv, I801_BLOCK_DATA |
524 (hwpec ? SMBHSTCNT_PEC_EN : 0));
525 if (status)
526 return status;
527
528 if (read_write == I2C_SMBUS_READ) {
529 len = inb_p(SMBHSTDAT0(priv));
530 if (len < 1 || len > I2C_SMBUS_BLOCK_MAX)
531 return -EPROTO;
532
533 data->block[0] = len;
534 for (i = 0; i < len; i++)
535 data->block[i + 1] = inb_p(SMBBLKDAT(priv));
536 }
537 return 0;
538 }
539
540 static void i801_isr_byte_done(struct i801_priv *priv)
541 {
542 if (priv->is_read) {
543 /* For SMBus block reads, length is received with first byte */
544 if (((priv->cmd & 0x1c) == I801_BLOCK_DATA) &&
545 (priv->count == 0)) {
546 priv->len = inb_p(SMBHSTDAT0(priv));
547 if (priv->len < 1 || priv->len > I2C_SMBUS_BLOCK_MAX) {
548 dev_err(&priv->pci_dev->dev,
549 "Illegal SMBus block read size %d\n",
550 priv->len);
551 /* FIXME: Recover */
552 priv->len = I2C_SMBUS_BLOCK_MAX;
553 } else {
554 dev_dbg(&priv->pci_dev->dev,
555 "SMBus block read size is %d\n",
556 priv->len);
557 }
558 priv->data[-1] = priv->len;
559 }
560
561 /* Read next byte */
562 if (priv->count < priv->len)
563 priv->data[priv->count++] = inb(SMBBLKDAT(priv));
564 else
565 dev_dbg(&priv->pci_dev->dev,
566 "Discarding extra byte on block read\n");
567
568 /* Set LAST_BYTE for last byte of read transaction */
569 if (priv->count == priv->len - 1)
570 outb_p(priv->cmd | SMBHSTCNT_LAST_BYTE,
571 SMBHSTCNT(priv));
572 } else if (priv->count < priv->len - 1) {
573 /* Write next byte, except for IRQ after last byte */
574 outb_p(priv->data[++priv->count], SMBBLKDAT(priv));
575 }
576
577 /* Clear BYTE_DONE to continue with next byte */
578 outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS(priv));
579 }
580
581 static irqreturn_t i801_host_notify_isr(struct i801_priv *priv)
582 {
583 unsigned short addr;
584 unsigned int data;
585
586 addr = inb_p(SMBNTFDADD(priv)) >> 1;
587 data = inw_p(SMBNTFDDAT(priv));
588
589 i2c_handle_smbus_host_notify(priv->host_notify, addr, data);
590
591 /* clear Host Notify bit and return */
592 outb_p(SMBSLVSTS_HST_NTFY_STS, SMBSLVSTS(priv));
593 return IRQ_HANDLED;
594 }
595
596 /*
597 * There are three kinds of interrupts:
598 *
599 * 1) i801 signals transaction completion with one of these interrupts:
600 * INTR - Success
601 * DEV_ERR - Invalid command, NAK or communication timeout
602 * BUS_ERR - SMI# transaction collision
603 * FAILED - transaction was canceled due to a KILL request
604 * When any of these occur, update ->status and wake up the waitq.
605 * ->status must be cleared before kicking off the next transaction.
606 *
607 * 2) For byte-by-byte (I2C read/write) transactions, one BYTE_DONE interrupt
608 * occurs for each byte of a byte-by-byte to prepare the next byte.
609 *
610 * 3) Host Notify interrupts
611 */
612 static irqreturn_t i801_isr(int irq, void *dev_id)
613 {
614 struct i801_priv *priv = dev_id;
615 u16 pcists;
616 u8 status;
617
618 /* Confirm this is our interrupt */
619 pci_read_config_word(priv->pci_dev, SMBPCISTS, &pcists);
620 if (!(pcists & SMBPCISTS_INTS))
621 return IRQ_NONE;
622
623 if (priv->features & FEATURE_HOST_NOTIFY) {
624 status = inb_p(SMBSLVSTS(priv));
625 if (status & SMBSLVSTS_HST_NTFY_STS)
626 return i801_host_notify_isr(priv);
627 }
628
629 status = inb_p(SMBHSTSTS(priv));
630 if (status & SMBHSTSTS_BYTE_DONE)
631 i801_isr_byte_done(priv);
632
633 /*
634 * Clear irq sources and report transaction result.
635 * ->status must be cleared before the next transaction is started.
636 */
637 status &= SMBHSTSTS_INTR | STATUS_ERROR_FLAGS;
638 if (status) {
639 outb_p(status, SMBHSTSTS(priv));
640 priv->status = status;
641 wake_up(&priv->waitq);
642 }
643
644 return IRQ_HANDLED;
645 }
646
647 /*
648 * For "byte-by-byte" block transactions:
649 * I2C write uses cmd=I801_BLOCK_DATA, I2C_EN=1
650 * I2C read uses cmd=I801_I2C_BLOCK_DATA
651 */
652 static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
653 union i2c_smbus_data *data,
654 char read_write, int command,
655 int hwpec)
656 {
657 int i, len;
658 int smbcmd;
659 int status;
660 int result;
661 const struct i2c_adapter *adap = &priv->adapter;
662
663 result = i801_check_pre(priv);
664 if (result < 0)
665 return result;
666
667 len = data->block[0];
668
669 if (read_write == I2C_SMBUS_WRITE) {
670 outb_p(len, SMBHSTDAT0(priv));
671 outb_p(data->block[1], SMBBLKDAT(priv));
672 }
673
674 if (command == I2C_SMBUS_I2C_BLOCK_DATA &&
675 read_write == I2C_SMBUS_READ)
676 smbcmd = I801_I2C_BLOCK_DATA;
677 else
678 smbcmd = I801_BLOCK_DATA;
679
680 if (priv->features & FEATURE_IRQ) {
681 priv->is_read = (read_write == I2C_SMBUS_READ);
682 if (len == 1 && priv->is_read)
683 smbcmd |= SMBHSTCNT_LAST_BYTE;
684 priv->cmd = smbcmd | SMBHSTCNT_INTREN;
685 priv->len = len;
686 priv->count = 0;
687 priv->data = &data->block[1];
688
689 outb_p(priv->cmd | SMBHSTCNT_START, SMBHSTCNT(priv));
690 result = wait_event_timeout(priv->waitq,
691 (status = priv->status),
692 adap->timeout);
693 if (!result) {
694 status = -ETIMEDOUT;
695 dev_warn(&priv->pci_dev->dev,
696 "Timeout waiting for interrupt!\n");
697 }
698 priv->status = 0;
699 return i801_check_post(priv, status);
700 }
701
702 for (i = 1; i <= len; i++) {
703 if (i == len && read_write == I2C_SMBUS_READ)
704 smbcmd |= SMBHSTCNT_LAST_BYTE;
705 outb_p(smbcmd, SMBHSTCNT(priv));
706
707 if (i == 1)
708 outb_p(inb(SMBHSTCNT(priv)) | SMBHSTCNT_START,
709 SMBHSTCNT(priv));
710
711 status = i801_wait_byte_done(priv);
712 if (status)
713 goto exit;
714
715 if (i == 1 && read_write == I2C_SMBUS_READ
716 && command != I2C_SMBUS_I2C_BLOCK_DATA) {
717 len = inb_p(SMBHSTDAT0(priv));
718 if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) {
719 dev_err(&priv->pci_dev->dev,
720 "Illegal SMBus block read size %d\n",
721 len);
722 /* Recover */
723 while (inb_p(SMBHSTSTS(priv)) &
724 SMBHSTSTS_HOST_BUSY)
725 outb_p(SMBHSTSTS_BYTE_DONE,
726 SMBHSTSTS(priv));
727 outb_p(SMBHSTSTS_INTR, SMBHSTSTS(priv));
728 return -EPROTO;
729 }
730 data->block[0] = len;
731 }
732
733 /* Retrieve/store value in SMBBLKDAT */
734 if (read_write == I2C_SMBUS_READ)
735 data->block[i] = inb_p(SMBBLKDAT(priv));
736 if (read_write == I2C_SMBUS_WRITE && i+1 <= len)
737 outb_p(data->block[i+1], SMBBLKDAT(priv));
738
739 /* signals SMBBLKDAT ready */
740 outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS(priv));
741 }
742
743 status = i801_wait_intr(priv);
744 exit:
745 return i801_check_post(priv, status);
746 }
747
748 static int i801_set_block_buffer_mode(struct i801_priv *priv)
749 {
750 outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_E32B, SMBAUXCTL(priv));
751 if ((inb_p(SMBAUXCTL(priv)) & SMBAUXCTL_E32B) == 0)
752 return -EIO;
753 return 0;
754 }
755
756 /* Block transaction function */
757 static int i801_block_transaction(struct i801_priv *priv,
758 union i2c_smbus_data *data, char read_write,
759 int command, int hwpec)
760 {
761 int result = 0;
762 unsigned char hostc;
763
764 if (command == I2C_SMBUS_I2C_BLOCK_DATA) {
765 if (read_write == I2C_SMBUS_WRITE) {
766 /* set I2C_EN bit in configuration register */
767 pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &hostc);
768 pci_write_config_byte(priv->pci_dev, SMBHSTCFG,
769 hostc | SMBHSTCFG_I2C_EN);
770 } else if (!(priv->features & FEATURE_I2C_BLOCK_READ)) {
771 dev_err(&priv->pci_dev->dev,
772 "I2C block read is unsupported!\n");
773 return -EOPNOTSUPP;
774 }
775 }
776
777 if (read_write == I2C_SMBUS_WRITE
778 || command == I2C_SMBUS_I2C_BLOCK_DATA) {
779 if (data->block[0] < 1)
780 data->block[0] = 1;
781 if (data->block[0] > I2C_SMBUS_BLOCK_MAX)
782 data->block[0] = I2C_SMBUS_BLOCK_MAX;
783 } else {
784 data->block[0] = 32; /* max for SMBus block reads */
785 }
786
787 /* Experience has shown that the block buffer can only be used for
788 SMBus (not I2C) block transactions, even though the datasheet
789 doesn't mention this limitation. */
790 if ((priv->features & FEATURE_BLOCK_BUFFER)
791 && command != I2C_SMBUS_I2C_BLOCK_DATA
792 && i801_set_block_buffer_mode(priv) == 0)
793 result = i801_block_transaction_by_block(priv, data,
794 read_write, hwpec);
795 else
796 result = i801_block_transaction_byte_by_byte(priv, data,
797 read_write,
798 command, hwpec);
799
800 if (command == I2C_SMBUS_I2C_BLOCK_DATA
801 && read_write == I2C_SMBUS_WRITE) {
802 /* restore saved configuration register value */
803 pci_write_config_byte(priv->pci_dev, SMBHSTCFG, hostc);
804 }
805 return result;
806 }
807
808 /* Return negative errno on error. */
809 static s32 i801_access(struct i2c_adapter *adap, u16 addr,
810 unsigned short flags, char read_write, u8 command,
811 int size, union i2c_smbus_data *data)
812 {
813 int hwpec;
814 int block = 0;
815 int ret = 0, xact = 0;
816 struct i801_priv *priv = i2c_get_adapdata(adap);
817
818 mutex_lock(&priv->acpi_lock);
819 if (priv->acpi_reserved) {
820 mutex_unlock(&priv->acpi_lock);
821 return -EBUSY;
822 }
823
824 pm_runtime_get_sync(&priv->pci_dev->dev);
825
826 hwpec = (priv->features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
827 && size != I2C_SMBUS_QUICK
828 && size != I2C_SMBUS_I2C_BLOCK_DATA;
829
830 switch (size) {
831 case I2C_SMBUS_QUICK:
832 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
833 SMBHSTADD(priv));
834 xact = I801_QUICK;
835 break;
836 case I2C_SMBUS_BYTE:
837 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
838 SMBHSTADD(priv));
839 if (read_write == I2C_SMBUS_WRITE)
840 outb_p(command, SMBHSTCMD(priv));
841 xact = I801_BYTE;
842 break;
843 case I2C_SMBUS_BYTE_DATA:
844 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
845 SMBHSTADD(priv));
846 outb_p(command, SMBHSTCMD(priv));
847 if (read_write == I2C_SMBUS_WRITE)
848 outb_p(data->byte, SMBHSTDAT0(priv));
849 xact = I801_BYTE_DATA;
850 break;
851 case I2C_SMBUS_WORD_DATA:
852 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
853 SMBHSTADD(priv));
854 outb_p(command, SMBHSTCMD(priv));
855 if (read_write == I2C_SMBUS_WRITE) {
856 outb_p(data->word & 0xff, SMBHSTDAT0(priv));
857 outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1(priv));
858 }
859 xact = I801_WORD_DATA;
860 break;
861 case I2C_SMBUS_BLOCK_DATA:
862 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
863 SMBHSTADD(priv));
864 outb_p(command, SMBHSTCMD(priv));
865 block = 1;
866 break;
867 case I2C_SMBUS_I2C_BLOCK_DATA:
868 /* NB: page 240 of ICH5 datasheet shows that the R/#W
869 * bit should be cleared here, even when reading */
870 outb_p((addr & 0x7f) << 1, SMBHSTADD(priv));
871 if (read_write == I2C_SMBUS_READ) {
872 /* NB: page 240 of ICH5 datasheet also shows
873 * that DATA1 is the cmd field when reading */
874 outb_p(command, SMBHSTDAT1(priv));
875 } else
876 outb_p(command, SMBHSTCMD(priv));
877 block = 1;
878 break;
879 default:
880 dev_err(&priv->pci_dev->dev, "Unsupported transaction %d\n",
881 size);
882 ret = -EOPNOTSUPP;
883 goto out;
884 }
885
886 if (hwpec) /* enable/disable hardware PEC */
887 outb_p(inb_p(SMBAUXCTL(priv)) | SMBAUXCTL_CRC, SMBAUXCTL(priv));
888 else
889 outb_p(inb_p(SMBAUXCTL(priv)) & (~SMBAUXCTL_CRC),
890 SMBAUXCTL(priv));
891
892 if (block)
893 ret = i801_block_transaction(priv, data, read_write, size,
894 hwpec);
895 else
896 ret = i801_transaction(priv, xact);
897
898 /* Some BIOSes don't like it when PEC is enabled at reboot or resume
899 time, so we forcibly disable it after every transaction. Turn off
900 E32B for the same reason. */
901 if (hwpec || block)
902 outb_p(inb_p(SMBAUXCTL(priv)) &
903 ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv));
904
905 if (block)
906 goto out;
907 if (ret)
908 goto out;
909 if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK))
910 goto out;
911
912 switch (xact & 0x7f) {
913 case I801_BYTE: /* Result put in SMBHSTDAT0 */
914 case I801_BYTE_DATA:
915 data->byte = inb_p(SMBHSTDAT0(priv));
916 break;
917 case I801_WORD_DATA:
918 data->word = inb_p(SMBHSTDAT0(priv)) +
919 (inb_p(SMBHSTDAT1(priv)) << 8);
920 break;
921 }
922
923 out:
924 pm_runtime_mark_last_busy(&priv->pci_dev->dev);
925 pm_runtime_put_autosuspend(&priv->pci_dev->dev);
926 mutex_unlock(&priv->acpi_lock);
927 return ret;
928 }
929
930
931 static u32 i801_func(struct i2c_adapter *adapter)
932 {
933 struct i801_priv *priv = i2c_get_adapdata(adapter);
934
935 return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
936 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
937 I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK |
938 ((priv->features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) |
939 ((priv->features & FEATURE_I2C_BLOCK_READ) ?
940 I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0) |
941 ((priv->features & FEATURE_HOST_NOTIFY) ?
942 I2C_FUNC_SMBUS_HOST_NOTIFY : 0);
943 }
944
945 static int i801_enable_host_notify(struct i2c_adapter *adapter)
946 {
947 struct i801_priv *priv = i2c_get_adapdata(adapter);
948
949 if (!(priv->features & FEATURE_HOST_NOTIFY))
950 return -ENOTSUPP;
951
952 if (!priv->host_notify)
953 priv->host_notify = i2c_setup_smbus_host_notify(adapter);
954 if (!priv->host_notify)
955 return -ENOMEM;
956
957 outb_p(SMBSLVCMD_HST_NTFY_INTREN, SMBSLVCMD(priv));
958 /* clear Host Notify bit to allow a new notification */
959 outb_p(SMBSLVSTS_HST_NTFY_STS, SMBSLVSTS(priv));
960
961 return 0;
962 }
963
964 static const struct i2c_algorithm smbus_algorithm = {
965 .smbus_xfer = i801_access,
966 .functionality = i801_func,
967 };
968
969 static const struct pci_device_id i801_ids[] = {
970 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) },
971 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) },
972 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) },
973 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) },
974 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) },
975 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) },
976 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) },
977 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) },
978 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) },
979 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) },
980 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) },
981 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) },
982 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EP80579_1) },
983 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_4) },
984 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_5) },
985 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS) },
986 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS) },
987 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS) },
988 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0) },
989 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1) },
990 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2) },
991 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS) },
992 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS) },
993 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS) },
994 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS) },
995 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_AVOTON_SMBUS) },
996 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS) },
997 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0) },
998 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1) },
999 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2) },
1000 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS) },
1001 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WILDCATPOINT_SMBUS) },
1002 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS) },
1003 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS) },
1004 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BRASWELL_SMBUS) },
1005 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS) },
1006 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS) },
1007 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DNV_SMBUS) },
1008 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BROXTON_SMBUS) },
1009 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS) },
1010 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS) },
1011 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS) },
1012 { 0, }
1013 };
1014
1015 MODULE_DEVICE_TABLE(pci, i801_ids);
1016
1017 #if defined CONFIG_X86 && defined CONFIG_DMI
1018 static unsigned char apanel_addr;
1019
1020 /* Scan the system ROM for the signature "FJKEYINF" */
1021 static __init const void __iomem *bios_signature(const void __iomem *bios)
1022 {
1023 ssize_t offset;
1024 const unsigned char signature[] = "FJKEYINF";
1025
1026 for (offset = 0; offset < 0x10000; offset += 0x10) {
1027 if (check_signature(bios + offset, signature,
1028 sizeof(signature)-1))
1029 return bios + offset;
1030 }
1031 return NULL;
1032 }
1033
1034 static void __init input_apanel_init(void)
1035 {
1036 void __iomem *bios;
1037 const void __iomem *p;
1038
1039 bios = ioremap(0xF0000, 0x10000); /* Can't fail */
1040 p = bios_signature(bios);
1041 if (p) {
1042 /* just use the first address */
1043 apanel_addr = readb(p + 8 + 3) >> 1;
1044 }
1045 iounmap(bios);
1046 }
1047
1048 struct dmi_onboard_device_info {
1049 const char *name;
1050 u8 type;
1051 unsigned short i2c_addr;
1052 const char *i2c_type;
1053 };
1054
1055 static const struct dmi_onboard_device_info dmi_devices[] = {
1056 { "Syleus", DMI_DEV_TYPE_OTHER, 0x73, "fscsyl" },
1057 { "Hermes", DMI_DEV_TYPE_OTHER, 0x73, "fscher" },
1058 { "Hades", DMI_DEV_TYPE_OTHER, 0x73, "fschds" },
1059 };
1060
1061 static void dmi_check_onboard_device(u8 type, const char *name,
1062 struct i2c_adapter *adap)
1063 {
1064 int i;
1065 struct i2c_board_info info;
1066
1067 for (i = 0; i < ARRAY_SIZE(dmi_devices); i++) {
1068 /* & ~0x80, ignore enabled/disabled bit */
1069 if ((type & ~0x80) != dmi_devices[i].type)
1070 continue;
1071 if (strcasecmp(name, dmi_devices[i].name))
1072 continue;
1073
1074 memset(&info, 0, sizeof(struct i2c_board_info));
1075 info.addr = dmi_devices[i].i2c_addr;
1076 strlcpy(info.type, dmi_devices[i].i2c_type, I2C_NAME_SIZE);
1077 i2c_new_device(adap, &info);
1078 break;
1079 }
1080 }
1081
1082 /* We use our own function to check for onboard devices instead of
1083 dmi_find_device() as some buggy BIOS's have the devices we are interested
1084 in marked as disabled */
1085 static void dmi_check_onboard_devices(const struct dmi_header *dm, void *adap)
1086 {
1087 int i, count;
1088
1089 if (dm->type != 10)
1090 return;
1091
1092 count = (dm->length - sizeof(struct dmi_header)) / 2;
1093 for (i = 0; i < count; i++) {
1094 const u8 *d = (char *)(dm + 1) + (i * 2);
1095 const char *name = ((char *) dm) + dm->length;
1096 u8 type = d[0];
1097 u8 s = d[1];
1098
1099 if (!s)
1100 continue;
1101 s--;
1102 while (s > 0 && name[0]) {
1103 name += strlen(name) + 1;
1104 s--;
1105 }
1106 if (name[0] == 0) /* Bogus string reference */
1107 continue;
1108
1109 dmi_check_onboard_device(type, name, adap);
1110 }
1111 }
1112
1113 /* Register optional slaves */
1114 static void i801_probe_optional_slaves(struct i801_priv *priv)
1115 {
1116 /* Only register slaves on main SMBus channel */
1117 if (priv->features & FEATURE_IDF)
1118 return;
1119
1120 if (apanel_addr) {
1121 struct i2c_board_info info;
1122
1123 memset(&info, 0, sizeof(struct i2c_board_info));
1124 info.addr = apanel_addr;
1125 strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE);
1126 i2c_new_device(&priv->adapter, &info);
1127 }
1128
1129 if (dmi_name_in_vendors("FUJITSU"))
1130 dmi_walk(dmi_check_onboard_devices, &priv->adapter);
1131 }
1132 #else
1133 static void __init input_apanel_init(void) {}
1134 static void i801_probe_optional_slaves(struct i801_priv *priv) {}
1135 #endif /* CONFIG_X86 && CONFIG_DMI */
1136
1137 #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
1138 static struct i801_mux_config i801_mux_config_asus_z8_d12 = {
1139 .gpio_chip = "gpio_ich",
1140 .values = { 0x02, 0x03 },
1141 .n_values = 2,
1142 .classes = { I2C_CLASS_SPD, I2C_CLASS_SPD },
1143 .gpios = { 52, 53 },
1144 .n_gpios = 2,
1145 };
1146
1147 static struct i801_mux_config i801_mux_config_asus_z8_d18 = {
1148 .gpio_chip = "gpio_ich",
1149 .values = { 0x02, 0x03, 0x01 },
1150 .n_values = 3,
1151 .classes = { I2C_CLASS_SPD, I2C_CLASS_SPD, I2C_CLASS_SPD },
1152 .gpios = { 52, 53 },
1153 .n_gpios = 2,
1154 };
1155
1156 static const struct dmi_system_id mux_dmi_table[] = {
1157 {
1158 .matches = {
1159 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1160 DMI_MATCH(DMI_BOARD_NAME, "Z8NA-D6(C)"),
1161 },
1162 .driver_data = &i801_mux_config_asus_z8_d12,
1163 },
1164 {
1165 .matches = {
1166 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1167 DMI_MATCH(DMI_BOARD_NAME, "Z8P(N)E-D12(X)"),
1168 },
1169 .driver_data = &i801_mux_config_asus_z8_d12,
1170 },
1171 {
1172 .matches = {
1173 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1174 DMI_MATCH(DMI_BOARD_NAME, "Z8NH-D12"),
1175 },
1176 .driver_data = &i801_mux_config_asus_z8_d12,
1177 },
1178 {
1179 .matches = {
1180 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1181 DMI_MATCH(DMI_BOARD_NAME, "Z8PH-D12/IFB"),
1182 },
1183 .driver_data = &i801_mux_config_asus_z8_d12,
1184 },
1185 {
1186 .matches = {
1187 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1188 DMI_MATCH(DMI_BOARD_NAME, "Z8NR-D12"),
1189 },
1190 .driver_data = &i801_mux_config_asus_z8_d12,
1191 },
1192 {
1193 .matches = {
1194 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1195 DMI_MATCH(DMI_BOARD_NAME, "Z8P(N)H-D12"),
1196 },
1197 .driver_data = &i801_mux_config_asus_z8_d12,
1198 },
1199 {
1200 .matches = {
1201 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1202 DMI_MATCH(DMI_BOARD_NAME, "Z8PG-D18"),
1203 },
1204 .driver_data = &i801_mux_config_asus_z8_d18,
1205 },
1206 {
1207 .matches = {
1208 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1209 DMI_MATCH(DMI_BOARD_NAME, "Z8PE-D18"),
1210 },
1211 .driver_data = &i801_mux_config_asus_z8_d18,
1212 },
1213 {
1214 .matches = {
1215 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1216 DMI_MATCH(DMI_BOARD_NAME, "Z8PS-D12"),
1217 },
1218 .driver_data = &i801_mux_config_asus_z8_d12,
1219 },
1220 { }
1221 };
1222
1223 /* Setup multiplexing if needed */
1224 static int i801_add_mux(struct i801_priv *priv)
1225 {
1226 struct device *dev = &priv->adapter.dev;
1227 const struct i801_mux_config *mux_config;
1228 struct i2c_mux_gpio_platform_data gpio_data;
1229 int err;
1230
1231 if (!priv->mux_drvdata)
1232 return 0;
1233 mux_config = priv->mux_drvdata;
1234
1235 /* Prepare the platform data */
1236 memset(&gpio_data, 0, sizeof(struct i2c_mux_gpio_platform_data));
1237 gpio_data.parent = priv->adapter.nr;
1238 gpio_data.values = mux_config->values;
1239 gpio_data.n_values = mux_config->n_values;
1240 gpio_data.classes = mux_config->classes;
1241 gpio_data.gpio_chip = mux_config->gpio_chip;
1242 gpio_data.gpios = mux_config->gpios;
1243 gpio_data.n_gpios = mux_config->n_gpios;
1244 gpio_data.idle = I2C_MUX_GPIO_NO_IDLE;
1245
1246 /* Register the mux device */
1247 priv->mux_pdev = platform_device_register_data(dev, "i2c-mux-gpio",
1248 PLATFORM_DEVID_AUTO, &gpio_data,
1249 sizeof(struct i2c_mux_gpio_platform_data));
1250 if (IS_ERR(priv->mux_pdev)) {
1251 err = PTR_ERR(priv->mux_pdev);
1252 priv->mux_pdev = NULL;
1253 dev_err(dev, "Failed to register i2c-mux-gpio device\n");
1254 return err;
1255 }
1256
1257 return 0;
1258 }
1259
1260 static void i801_del_mux(struct i801_priv *priv)
1261 {
1262 if (priv->mux_pdev)
1263 platform_device_unregister(priv->mux_pdev);
1264 }
1265
1266 static unsigned int i801_get_adapter_class(struct i801_priv *priv)
1267 {
1268 const struct dmi_system_id *id;
1269 const struct i801_mux_config *mux_config;
1270 unsigned int class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
1271 int i;
1272
1273 id = dmi_first_match(mux_dmi_table);
1274 if (id) {
1275 /* Remove branch classes from trunk */
1276 mux_config = id->driver_data;
1277 for (i = 0; i < mux_config->n_values; i++)
1278 class &= ~mux_config->classes[i];
1279
1280 /* Remember for later */
1281 priv->mux_drvdata = mux_config;
1282 }
1283
1284 return class;
1285 }
1286 #else
1287 static inline int i801_add_mux(struct i801_priv *priv) { return 0; }
1288 static inline void i801_del_mux(struct i801_priv *priv) { }
1289
1290 static inline unsigned int i801_get_adapter_class(struct i801_priv *priv)
1291 {
1292 return I2C_CLASS_HWMON | I2C_CLASS_SPD;
1293 }
1294 #endif
1295
1296 static const struct itco_wdt_platform_data tco_platform_data = {
1297 .name = "Intel PCH",
1298 .version = 4,
1299 };
1300
1301 static DEFINE_SPINLOCK(p2sb_spinlock);
1302
1303 static void i801_add_tco(struct i801_priv *priv)
1304 {
1305 struct pci_dev *pci_dev = priv->pci_dev;
1306 struct resource tco_res[3], *res;
1307 struct platform_device *pdev;
1308 unsigned int devfn;
1309 u32 tco_base, tco_ctl;
1310 u32 base_addr, ctrl_val;
1311 u64 base64_addr;
1312
1313 if (!(priv->features & FEATURE_TCO))
1314 return;
1315
1316 pci_read_config_dword(pci_dev, TCOBASE, &tco_base);
1317 pci_read_config_dword(pci_dev, TCOCTL, &tco_ctl);
1318 if (!(tco_ctl & TCOCTL_EN))
1319 return;
1320
1321 memset(tco_res, 0, sizeof(tco_res));
1322
1323 res = &tco_res[ICH_RES_IO_TCO];
1324 res->start = tco_base & ~1;
1325 res->end = res->start + 32 - 1;
1326 res->flags = IORESOURCE_IO;
1327
1328 /*
1329 * Power Management registers.
1330 */
1331 devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 2);
1332 pci_bus_read_config_dword(pci_dev->bus, devfn, ACPIBASE, &base_addr);
1333
1334 res = &tco_res[ICH_RES_IO_SMI];
1335 res->start = (base_addr & ~1) + ACPIBASE_SMI_OFF;
1336 res->end = res->start + 3;
1337 res->flags = IORESOURCE_IO;
1338
1339 /*
1340 * Enable the ACPI I/O space.
1341 */
1342 pci_bus_read_config_dword(pci_dev->bus, devfn, ACPICTRL, &ctrl_val);
1343 ctrl_val |= ACPICTRL_EN;
1344 pci_bus_write_config_dword(pci_dev->bus, devfn, ACPICTRL, ctrl_val);
1345
1346 /*
1347 * We must access the NO_REBOOT bit over the Primary to Sideband
1348 * bridge (P2SB). The BIOS prevents the P2SB device from being
1349 * enumerated by the PCI subsystem, so we need to unhide/hide it
1350 * to lookup the P2SB BAR.
1351 */
1352 spin_lock(&p2sb_spinlock);
1353
1354 devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1);
1355
1356 /* Unhide the P2SB device */
1357 pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0);
1358
1359 pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR, &base_addr);
1360 base64_addr = base_addr & 0xfffffff0;
1361
1362 pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR + 0x4, &base_addr);
1363 base64_addr |= (u64)base_addr << 32;
1364
1365 /* Hide the P2SB device */
1366 pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x1);
1367 spin_unlock(&p2sb_spinlock);
1368
1369 res = &tco_res[ICH_RES_MEM_OFF];
1370 res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
1371 res->end = res->start + 3;
1372 res->flags = IORESOURCE_MEM;
1373
1374 pdev = platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1,
1375 tco_res, 3, &tco_platform_data,
1376 sizeof(tco_platform_data));
1377 if (IS_ERR(pdev)) {
1378 dev_warn(&pci_dev->dev, "failed to create iTCO device\n");
1379 return;
1380 }
1381
1382 priv->tco_pdev = pdev;
1383 }
1384
1385 #ifdef CONFIG_ACPI
1386 static acpi_status
1387 i801_acpi_io_handler(u32 function, acpi_physical_address address, u32 bits,
1388 u64 *value, void *handler_context, void *region_context)
1389 {
1390 struct i801_priv *priv = handler_context;
1391 struct pci_dev *pdev = priv->pci_dev;
1392 acpi_status status;
1393
1394 /*
1395 * Once BIOS AML code touches the OpRegion we warn and inhibit any
1396 * further access from the driver itself. This device is now owned
1397 * by the system firmware.
1398 */
1399 mutex_lock(&priv->acpi_lock);
1400
1401 if (!priv->acpi_reserved) {
1402 priv->acpi_reserved = true;
1403
1404 dev_warn(&pdev->dev, "BIOS is accessing SMBus registers\n");
1405 dev_warn(&pdev->dev, "Driver SMBus register access inhibited\n");
1406
1407 /*
1408 * BIOS is accessing the host controller so prevent it from
1409 * suspending automatically from now on.
1410 */
1411 pm_runtime_get_sync(&pdev->dev);
1412 }
1413
1414 if ((function & ACPI_IO_MASK) == ACPI_READ)
1415 status = acpi_os_read_port(address, (u32 *)value, bits);
1416 else
1417 status = acpi_os_write_port(address, (u32)*value, bits);
1418
1419 mutex_unlock(&priv->acpi_lock);
1420
1421 return status;
1422 }
1423
1424 static int i801_acpi_probe(struct i801_priv *priv)
1425 {
1426 struct acpi_device *adev;
1427 acpi_status status;
1428
1429 adev = ACPI_COMPANION(&priv->pci_dev->dev);
1430 if (adev) {
1431 status = acpi_install_address_space_handler(adev->handle,
1432 ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler,
1433 NULL, priv);
1434 if (ACPI_SUCCESS(status))
1435 return 0;
1436 }
1437
1438 return acpi_check_resource_conflict(&priv->pci_dev->resource[SMBBAR]);
1439 }
1440
1441 static void i801_acpi_remove(struct i801_priv *priv)
1442 {
1443 struct acpi_device *adev;
1444
1445 adev = ACPI_COMPANION(&priv->pci_dev->dev);
1446 if (!adev)
1447 return;
1448
1449 acpi_remove_address_space_handler(adev->handle,
1450 ACPI_ADR_SPACE_SYSTEM_IO, i801_acpi_io_handler);
1451
1452 mutex_lock(&priv->acpi_lock);
1453 if (priv->acpi_reserved)
1454 pm_runtime_put(&priv->pci_dev->dev);
1455 mutex_unlock(&priv->acpi_lock);
1456 }
1457 #else
1458 static inline int i801_acpi_probe(struct i801_priv *priv) { return 0; }
1459 static inline void i801_acpi_remove(struct i801_priv *priv) { }
1460 #endif
1461
1462 static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
1463 {
1464 unsigned char temp;
1465 int err, i;
1466 struct i801_priv *priv;
1467
1468 priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
1469 if (!priv)
1470 return -ENOMEM;
1471
1472 i2c_set_adapdata(&priv->adapter, priv);
1473 priv->adapter.owner = THIS_MODULE;
1474 priv->adapter.class = i801_get_adapter_class(priv);
1475 priv->adapter.algo = &smbus_algorithm;
1476 priv->adapter.dev.parent = &dev->dev;
1477 ACPI_COMPANION_SET(&priv->adapter.dev, ACPI_COMPANION(&dev->dev));
1478 priv->adapter.retries = 3;
1479 mutex_init(&priv->acpi_lock);
1480
1481 priv->pci_dev = dev;
1482 switch (dev->device) {
1483 case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS:
1484 case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS:
1485 case PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS:
1486 case PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS:
1487 case PCI_DEVICE_ID_INTEL_DNV_SMBUS:
1488 case PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS:
1489 priv->features |= FEATURE_I2C_BLOCK_READ;
1490 priv->features |= FEATURE_IRQ;
1491 priv->features |= FEATURE_SMBUS_PEC;
1492 priv->features |= FEATURE_BLOCK_BUFFER;
1493 /* If we have ACPI based watchdog use that instead */
1494 if (!acpi_has_watchdog())
1495 priv->features |= FEATURE_TCO;
1496 priv->features |= FEATURE_HOST_NOTIFY;
1497 break;
1498
1499 case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0:
1500 case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1:
1501 case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2:
1502 case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0:
1503 case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1:
1504 case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2:
1505 priv->features |= FEATURE_IDF;
1506 /* fall through */
1507 default:
1508 priv->features |= FEATURE_I2C_BLOCK_READ;
1509 priv->features |= FEATURE_IRQ;
1510 /* fall through */
1511 case PCI_DEVICE_ID_INTEL_82801DB_3:
1512 priv->features |= FEATURE_SMBUS_PEC;
1513 priv->features |= FEATURE_BLOCK_BUFFER;
1514 /* fall through */
1515 case PCI_DEVICE_ID_INTEL_82801CA_3:
1516 priv->features |= FEATURE_HOST_NOTIFY;
1517 /* fall through */
1518 case PCI_DEVICE_ID_INTEL_82801BA_2:
1519 case PCI_DEVICE_ID_INTEL_82801AB_3:
1520 case PCI_DEVICE_ID_INTEL_82801AA_3:
1521 break;
1522 }
1523
1524 /* Disable features on user request */
1525 for (i = 0; i < ARRAY_SIZE(i801_feature_names); i++) {
1526 if (priv->features & disable_features & (1 << i))
1527 dev_notice(&dev->dev, "%s disabled by user\n",
1528 i801_feature_names[i]);
1529 }
1530 priv->features &= ~disable_features;
1531
1532 err = pcim_enable_device(dev);
1533 if (err) {
1534 dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n",
1535 err);
1536 return err;
1537 }
1538 pcim_pin_device(dev);
1539
1540 /* Determine the address of the SMBus area */
1541 priv->smba = pci_resource_start(dev, SMBBAR);
1542 if (!priv->smba) {
1543 dev_err(&dev->dev,
1544 "SMBus base address uninitialized, upgrade BIOS\n");
1545 return -ENODEV;
1546 }
1547
1548 if (i801_acpi_probe(priv))
1549 return -ENODEV;
1550
1551 err = pcim_iomap_regions(dev, 1 << SMBBAR,
1552 dev_driver_string(&dev->dev));
1553 if (err) {
1554 dev_err(&dev->dev,
1555 "Failed to request SMBus region 0x%lx-0x%Lx\n",
1556 priv->smba,
1557 (unsigned long long)pci_resource_end(dev, SMBBAR));
1558 i801_acpi_remove(priv);
1559 return err;
1560 }
1561
1562 pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &temp);
1563 priv->original_hstcfg = temp;
1564 temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */
1565 if (!(temp & SMBHSTCFG_HST_EN)) {
1566 dev_info(&dev->dev, "Enabling SMBus device\n");
1567 temp |= SMBHSTCFG_HST_EN;
1568 }
1569 pci_write_config_byte(priv->pci_dev, SMBHSTCFG, temp);
1570
1571 if (temp & SMBHSTCFG_SMB_SMI_EN) {
1572 dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n");
1573 /* Disable SMBus interrupt feature if SMBus using SMI# */
1574 priv->features &= ~FEATURE_IRQ;
1575 }
1576
1577 /* Clear special mode bits */
1578 if (priv->features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER))
1579 outb_p(inb_p(SMBAUXCTL(priv)) &
1580 ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv));
1581
1582 /* Default timeout in interrupt mode: 200 ms */
1583 priv->adapter.timeout = HZ / 5;
1584
1585 if (priv->features & FEATURE_IRQ) {
1586 u16 pcictl, pcists;
1587
1588 /* Complain if an interrupt is already pending */
1589 pci_read_config_word(priv->pci_dev, SMBPCISTS, &pcists);
1590 if (pcists & SMBPCISTS_INTS)
1591 dev_warn(&dev->dev, "An interrupt is pending!\n");
1592
1593 /* Check if interrupts have been disabled */
1594 pci_read_config_word(priv->pci_dev, SMBPCICTL, &pcictl);
1595 if (pcictl & SMBPCICTL_INTDIS) {
1596 dev_info(&dev->dev, "Interrupts are disabled\n");
1597 priv->features &= ~FEATURE_IRQ;
1598 }
1599 }
1600
1601 if (priv->features & FEATURE_IRQ) {
1602 init_waitqueue_head(&priv->waitq);
1603
1604 err = devm_request_irq(&dev->dev, dev->irq, i801_isr,
1605 IRQF_SHARED,
1606 dev_driver_string(&dev->dev), priv);
1607 if (err) {
1608 dev_err(&dev->dev, "Failed to allocate irq %d: %d\n",
1609 dev->irq, err);
1610 priv->features &= ~FEATURE_IRQ;
1611 }
1612 }
1613 dev_info(&dev->dev, "SMBus using %s\n",
1614 priv->features & FEATURE_IRQ ? "PCI interrupt" : "polling");
1615
1616 i801_add_tco(priv);
1617
1618 snprintf(priv->adapter.name, sizeof(priv->adapter.name),
1619 "SMBus I801 adapter at %04lx", priv->smba);
1620 err = i2c_add_adapter(&priv->adapter);
1621 if (err) {
1622 i801_acpi_remove(priv);
1623 return err;
1624 }
1625
1626 /*
1627 * Enable Host Notify for chips that supports it.
1628 * It is done after i2c_add_adapter() so that we are sure the work queue
1629 * is not used if i2c_add_adapter() fails.
1630 */
1631 err = i801_enable_host_notify(&priv->adapter);
1632 if (err && err != -ENOTSUPP)
1633 dev_warn(&dev->dev, "Unable to enable SMBus Host Notify\n");
1634
1635 i801_probe_optional_slaves(priv);
1636 /* We ignore errors - multiplexing is optional */
1637 i801_add_mux(priv);
1638
1639 pci_set_drvdata(dev, priv);
1640
1641 pm_runtime_set_autosuspend_delay(&dev->dev, 1000);
1642 pm_runtime_use_autosuspend(&dev->dev);
1643 pm_runtime_put_autosuspend(&dev->dev);
1644 pm_runtime_allow(&dev->dev);
1645
1646 return 0;
1647 }
1648
1649 static void i801_remove(struct pci_dev *dev)
1650 {
1651 struct i801_priv *priv = pci_get_drvdata(dev);
1652
1653 pm_runtime_forbid(&dev->dev);
1654 pm_runtime_get_noresume(&dev->dev);
1655
1656 i801_del_mux(priv);
1657 i2c_del_adapter(&priv->adapter);
1658 i801_acpi_remove(priv);
1659 pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg);
1660
1661 platform_device_unregister(priv->tco_pdev);
1662
1663 /*
1664 * do not call pci_disable_device(dev) since it can cause hard hangs on
1665 * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010)
1666 */
1667 }
1668
1669 #ifdef CONFIG_PM
1670 static int i801_suspend(struct device *dev)
1671 {
1672 struct pci_dev *pci_dev = to_pci_dev(dev);
1673 struct i801_priv *priv = pci_get_drvdata(pci_dev);
1674
1675 pci_write_config_byte(pci_dev, SMBHSTCFG, priv->original_hstcfg);
1676 return 0;
1677 }
1678
1679 static int i801_resume(struct device *dev)
1680 {
1681 struct pci_dev *pci_dev = to_pci_dev(dev);
1682 struct i801_priv *priv = pci_get_drvdata(pci_dev);
1683 int err;
1684
1685 err = i801_enable_host_notify(&priv->adapter);
1686 if (err && err != -ENOTSUPP)
1687 dev_warn(dev, "Unable to enable SMBus Host Notify\n");
1688
1689 return 0;
1690 }
1691 #endif
1692
1693 static UNIVERSAL_DEV_PM_OPS(i801_pm_ops, i801_suspend,
1694 i801_resume, NULL);
1695
1696 static struct pci_driver i801_driver = {
1697 .name = "i801_smbus",
1698 .id_table = i801_ids,
1699 .probe = i801_probe,
1700 .remove = i801_remove,
1701 .driver = {
1702 .pm = &i801_pm_ops,
1703 },
1704 };
1705
1706 static int __init i2c_i801_init(void)
1707 {
1708 if (dmi_name_in_vendors("FUJITSU"))
1709 input_apanel_init();
1710 return pci_register_driver(&i801_driver);
1711 }
1712
1713 static void __exit i2c_i801_exit(void)
1714 {
1715 pci_unregister_driver(&i801_driver);
1716 }
1717
1718 MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>, Jean Delvare <jdelvare@suse.de>");
1719 MODULE_DESCRIPTION("I801 SMBus driver");
1720 MODULE_LICENSE("GPL");
1721
1722 module_init(i2c_i801_init);
1723 module_exit(i2c_i801_exit);
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