Commit | Line | Data |
---|---|---|
04c17aa8 | 1 | /* |
f4574beb | 2 | * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd. |
04c17aa8 TM |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; version 2 of the License. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. | |
16 | */ | |
bb207ef1 | 17 | #include <linux/module.h> |
04c17aa8 TM |
18 | #include <linux/kernel.h> |
19 | #include <linux/pci.h> | |
20 | #include <linux/gpio.h> | |
38eb18a6 TM |
21 | #include <linux/interrupt.h> |
22 | #include <linux/irq.h> | |
23 | ||
24 | #define PCH_EDGE_FALLING 0 | |
25 | #define PCH_EDGE_RISING BIT(0) | |
26 | #define PCH_LEVEL_L BIT(1) | |
27 | #define PCH_LEVEL_H (BIT(0) | BIT(1)) | |
28 | #define PCH_EDGE_BOTH BIT(2) | |
29 | #define PCH_IM_MASK (BIT(0) | BIT(1) | BIT(2)) | |
30 | ||
31 | #define PCH_IRQ_BASE 24 | |
04c17aa8 | 32 | |
04c17aa8 TM |
33 | struct pch_regs { |
34 | u32 ien; | |
35 | u32 istatus; | |
36 | u32 idisp; | |
37 | u32 iclr; | |
38 | u32 imask; | |
39 | u32 imaskclr; | |
40 | u32 po; | |
41 | u32 pi; | |
42 | u32 pm; | |
43 | u32 im0; | |
44 | u32 im1; | |
e98bed7f TM |
45 | u32 reserved[3]; |
46 | u32 gpio_use_sel; | |
04c17aa8 TM |
47 | u32 reset; |
48 | }; | |
49 | ||
d4260e6d TM |
50 | enum pch_type_t { |
51 | INTEL_EG20T_PCH, | |
f4574beb TM |
52 | OKISEMI_ML7223m_IOH, /* LAPIS Semiconductor ML7223 IOH PCIe Bus-m */ |
53 | OKISEMI_ML7223n_IOH /* LAPIS Semiconductor ML7223 IOH PCIe Bus-n */ | |
d4260e6d TM |
54 | }; |
55 | ||
56 | /* Specifies number of GPIO PINS */ | |
57 | static int gpio_pins[] = { | |
58 | [INTEL_EG20T_PCH] = 12, | |
59 | [OKISEMI_ML7223m_IOH] = 8, | |
60 | [OKISEMI_ML7223n_IOH] = 8, | |
61 | }; | |
62 | ||
04c17aa8 TM |
63 | /** |
64 | * struct pch_gpio_reg_data - The register store data. | |
38eb18a6 TM |
65 | * @ien_reg: To store contents of IEN register. |
66 | * @imask_reg: To store contents of IMASK register. | |
04c17aa8 TM |
67 | * @po_reg: To store contents of PO register. |
68 | * @pm_reg: To store contents of PM register. | |
e98bed7f TM |
69 | * @im0_reg: To store contents of IM0 register. |
70 | * @im1_reg: To store contents of IM1 register. | |
71 | * @gpio_use_sel_reg : To store contents of GPIO_USE_SEL register. | |
72 | * (Only ML7223 Bus-n) | |
04c17aa8 TM |
73 | */ |
74 | struct pch_gpio_reg_data { | |
38eb18a6 TM |
75 | u32 ien_reg; |
76 | u32 imask_reg; | |
04c17aa8 TM |
77 | u32 po_reg; |
78 | u32 pm_reg; | |
e98bed7f TM |
79 | u32 im0_reg; |
80 | u32 im1_reg; | |
81 | u32 gpio_use_sel_reg; | |
04c17aa8 TM |
82 | }; |
83 | ||
84 | /** | |
85 | * struct pch_gpio - GPIO private data structure. | |
86 | * @base: PCI base address of Memory mapped I/O register. | |
87 | * @reg: Memory mapped PCH GPIO register list. | |
88 | * @dev: Pointer to device structure. | |
89 | * @gpio: Data for GPIO infrastructure. | |
90 | * @pch_gpio_reg: Memory mapped Register data is saved here | |
91 | * when suspend. | |
38eb18a6 TM |
92 | * @lock: Used for register access protection |
93 | * @irq_base: Save base of IRQ number for interrupt | |
d4260e6d | 94 | * @ioh: IOH ID |
7cb6580c | 95 | * @spinlock: Used for register access protection |
04c17aa8 TM |
96 | */ |
97 | struct pch_gpio { | |
98 | void __iomem *base; | |
99 | struct pch_regs __iomem *reg; | |
100 | struct device *dev; | |
101 | struct gpio_chip gpio; | |
102 | struct pch_gpio_reg_data pch_gpio_reg; | |
38eb18a6 | 103 | int irq_base; |
d4260e6d | 104 | enum pch_type_t ioh; |
d568a681 | 105 | spinlock_t spinlock; |
04c17aa8 TM |
106 | }; |
107 | ||
108 | static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) | |
109 | { | |
110 | u32 reg_val; | |
111 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
7cb6580c | 112 | unsigned long flags; |
04c17aa8 | 113 | |
7cb6580c | 114 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 TM |
115 | reg_val = ioread32(&chip->reg->po); |
116 | if (val) | |
117 | reg_val |= (1 << nr); | |
118 | else | |
119 | reg_val &= ~(1 << nr); | |
120 | ||
121 | iowrite32(reg_val, &chip->reg->po); | |
7cb6580c | 122 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
123 | } |
124 | ||
125 | static int pch_gpio_get(struct gpio_chip *gpio, unsigned nr) | |
126 | { | |
127 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
128 | ||
129 | return ioread32(&chip->reg->pi) & (1 << nr); | |
130 | } | |
131 | ||
132 | static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, | |
133 | int val) | |
134 | { | |
135 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
136 | u32 pm; | |
137 | u32 reg_val; | |
7cb6580c | 138 | unsigned long flags; |
04c17aa8 | 139 | |
7cb6580c | 140 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 TM |
141 | |
142 | reg_val = ioread32(&chip->reg->po); | |
143 | if (val) | |
144 | reg_val |= (1 << nr); | |
145 | else | |
146 | reg_val &= ~(1 << nr); | |
88aab934 | 147 | iowrite32(reg_val, &chip->reg->po); |
2ddf6cd6 DK |
148 | |
149 | pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); | |
150 | pm |= (1 << nr); | |
151 | iowrite32(pm, &chip->reg->pm); | |
152 | ||
7cb6580c | 153 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
154 | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) | |
159 | { | |
160 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
161 | u32 pm; | |
7cb6580c | 162 | unsigned long flags; |
04c17aa8 | 163 | |
7cb6580c | 164 | spin_lock_irqsave(&chip->spinlock, flags); |
d4260e6d | 165 | pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); |
04c17aa8 TM |
166 | pm &= ~(1 << nr); |
167 | iowrite32(pm, &chip->reg->pm); | |
7cb6580c | 168 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
169 | |
170 | return 0; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Save register configuration and disable interrupts. | |
175 | */ | |
176 | static void pch_gpio_save_reg_conf(struct pch_gpio *chip) | |
177 | { | |
38eb18a6 TM |
178 | chip->pch_gpio_reg.ien_reg = ioread32(&chip->reg->ien); |
179 | chip->pch_gpio_reg.imask_reg = ioread32(&chip->reg->imask); | |
04c17aa8 TM |
180 | chip->pch_gpio_reg.po_reg = ioread32(&chip->reg->po); |
181 | chip->pch_gpio_reg.pm_reg = ioread32(&chip->reg->pm); | |
e98bed7f TM |
182 | chip->pch_gpio_reg.im0_reg = ioread32(&chip->reg->im0); |
183 | if (chip->ioh == INTEL_EG20T_PCH) | |
184 | chip->pch_gpio_reg.im1_reg = ioread32(&chip->reg->im1); | |
185 | if (chip->ioh == OKISEMI_ML7223n_IOH) | |
186 | chip->pch_gpio_reg.gpio_use_sel_reg =\ | |
187 | ioread32(&chip->reg->gpio_use_sel); | |
04c17aa8 TM |
188 | } |
189 | ||
190 | /* | |
191 | * This function restores the register configuration of the GPIO device. | |
192 | */ | |
193 | static void pch_gpio_restore_reg_conf(struct pch_gpio *chip) | |
194 | { | |
38eb18a6 TM |
195 | iowrite32(chip->pch_gpio_reg.ien_reg, &chip->reg->ien); |
196 | iowrite32(chip->pch_gpio_reg.imask_reg, &chip->reg->imask); | |
04c17aa8 TM |
197 | /* to store contents of PO register */ |
198 | iowrite32(chip->pch_gpio_reg.po_reg, &chip->reg->po); | |
199 | /* to store contents of PM register */ | |
200 | iowrite32(chip->pch_gpio_reg.pm_reg, &chip->reg->pm); | |
e98bed7f TM |
201 | iowrite32(chip->pch_gpio_reg.im0_reg, &chip->reg->im0); |
202 | if (chip->ioh == INTEL_EG20T_PCH) | |
203 | iowrite32(chip->pch_gpio_reg.im1_reg, &chip->reg->im1); | |
204 | if (chip->ioh == OKISEMI_ML7223n_IOH) | |
205 | iowrite32(chip->pch_gpio_reg.gpio_use_sel_reg, | |
206 | &chip->reg->gpio_use_sel); | |
04c17aa8 TM |
207 | } |
208 | ||
38eb18a6 TM |
209 | static int pch_gpio_to_irq(struct gpio_chip *gpio, unsigned offset) |
210 | { | |
211 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
212 | return chip->irq_base + offset; | |
213 | } | |
214 | ||
04c17aa8 TM |
215 | static void pch_gpio_setup(struct pch_gpio *chip) |
216 | { | |
217 | struct gpio_chip *gpio = &chip->gpio; | |
218 | ||
219 | gpio->label = dev_name(chip->dev); | |
5c868fc6 | 220 | gpio->dev = chip->dev; |
04c17aa8 TM |
221 | gpio->owner = THIS_MODULE; |
222 | gpio->direction_input = pch_gpio_direction_input; | |
223 | gpio->get = pch_gpio_get; | |
224 | gpio->direction_output = pch_gpio_direction_output; | |
225 | gpio->set = pch_gpio_set; | |
226 | gpio->dbg_show = NULL; | |
227 | gpio->base = -1; | |
d4260e6d | 228 | gpio->ngpio = gpio_pins[chip->ioh]; |
9fb1f39e | 229 | gpio->can_sleep = false; |
38eb18a6 TM |
230 | gpio->to_irq = pch_gpio_to_irq; |
231 | } | |
232 | ||
233 | static int pch_irq_type(struct irq_data *d, unsigned int type) | |
234 | { | |
38eb18a6 TM |
235 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); |
236 | struct pch_gpio *chip = gc->private; | |
df9541a6 TG |
237 | u32 im, im_pos, val; |
238 | u32 __iomem *im_reg; | |
239 | unsigned long flags; | |
240 | int ch, irq = d->irq; | |
38eb18a6 TM |
241 | |
242 | ch = irq - chip->irq_base; | |
243 | if (irq <= chip->irq_base + 7) { | |
244 | im_reg = &chip->reg->im0; | |
245 | im_pos = ch; | |
246 | } else { | |
247 | im_reg = &chip->reg->im1; | |
248 | im_pos = ch - 8; | |
249 | } | |
250 | dev_dbg(chip->dev, "%s:irq=%d type=%d ch=%d pos=%d\n", | |
251 | __func__, irq, type, ch, im_pos); | |
252 | ||
253 | spin_lock_irqsave(&chip->spinlock, flags); | |
254 | ||
255 | switch (type) { | |
256 | case IRQ_TYPE_EDGE_RISING: | |
257 | val = PCH_EDGE_RISING; | |
258 | break; | |
259 | case IRQ_TYPE_EDGE_FALLING: | |
260 | val = PCH_EDGE_FALLING; | |
261 | break; | |
262 | case IRQ_TYPE_EDGE_BOTH: | |
263 | val = PCH_EDGE_BOTH; | |
264 | break; | |
265 | case IRQ_TYPE_LEVEL_HIGH: | |
266 | val = PCH_LEVEL_H; | |
267 | break; | |
268 | case IRQ_TYPE_LEVEL_LOW: | |
269 | val = PCH_LEVEL_L; | |
270 | break; | |
38eb18a6 | 271 | default: |
df9541a6 | 272 | goto unlock; |
38eb18a6 TM |
273 | } |
274 | ||
275 | /* Set interrupt mode */ | |
276 | im = ioread32(im_reg) & ~(PCH_IM_MASK << (im_pos * 4)); | |
277 | iowrite32(im | (val << (im_pos * 4)), im_reg); | |
278 | ||
df9541a6 TG |
279 | /* And the handler */ |
280 | if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) | |
281 | __irq_set_handler_locked(d->irq, handle_level_irq); | |
282 | else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) | |
283 | __irq_set_handler_locked(d->irq, handle_edge_irq); | |
38eb18a6 | 284 | |
df9541a6 | 285 | unlock: |
38eb18a6 | 286 | spin_unlock_irqrestore(&chip->spinlock, flags); |
38eb18a6 TM |
287 | return 0; |
288 | } | |
289 | ||
290 | static void pch_irq_unmask(struct irq_data *d) | |
291 | { | |
292 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); | |
293 | struct pch_gpio *chip = gc->private; | |
294 | ||
295 | iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imaskclr); | |
296 | } | |
297 | ||
298 | static void pch_irq_mask(struct irq_data *d) | |
299 | { | |
300 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); | |
301 | struct pch_gpio *chip = gc->private; | |
302 | ||
303 | iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imask); | |
304 | } | |
305 | ||
df9541a6 TG |
306 | static void pch_irq_ack(struct irq_data *d) |
307 | { | |
308 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); | |
309 | struct pch_gpio *chip = gc->private; | |
310 | ||
311 | iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->iclr); | |
312 | } | |
313 | ||
38eb18a6 TM |
314 | static irqreturn_t pch_gpio_handler(int irq, void *dev_id) |
315 | { | |
316 | struct pch_gpio *chip = dev_id; | |
317 | u32 reg_val = ioread32(&chip->reg->istatus); | |
df9541a6 | 318 | int i, ret = IRQ_NONE; |
38eb18a6 TM |
319 | |
320 | for (i = 0; i < gpio_pins[chip->ioh]; i++) { | |
321 | if (reg_val & BIT(i)) { | |
322 | dev_dbg(chip->dev, "%s:[%d]:irq=%d status=0x%x\n", | |
323 | __func__, i, irq, reg_val); | |
38eb18a6 TM |
324 | generic_handle_irq(chip->irq_base + i); |
325 | ret = IRQ_HANDLED; | |
326 | } | |
327 | } | |
328 | return ret; | |
329 | } | |
330 | ||
3836309d | 331 | static void pch_gpio_alloc_generic_chip(struct pch_gpio *chip, |
38eb18a6 TM |
332 | unsigned int irq_start, unsigned int num) |
333 | { | |
334 | struct irq_chip_generic *gc; | |
335 | struct irq_chip_type *ct; | |
336 | ||
337 | gc = irq_alloc_generic_chip("pch_gpio", 1, irq_start, chip->base, | |
338 | handle_simple_irq); | |
339 | gc->private = chip; | |
340 | ct = gc->chip_types; | |
341 | ||
df9541a6 | 342 | ct->chip.irq_ack = pch_irq_ack; |
38eb18a6 TM |
343 | ct->chip.irq_mask = pch_irq_mask; |
344 | ct->chip.irq_unmask = pch_irq_unmask; | |
345 | ct->chip.irq_set_type = pch_irq_type; | |
346 | ||
347 | irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, | |
348 | IRQ_NOREQUEST | IRQ_NOPROBE, 0); | |
04c17aa8 TM |
349 | } |
350 | ||
3836309d | 351 | static int pch_gpio_probe(struct pci_dev *pdev, |
04c17aa8 TM |
352 | const struct pci_device_id *id) |
353 | { | |
354 | s32 ret; | |
355 | struct pch_gpio *chip; | |
38eb18a6 | 356 | int irq_base; |
df9541a6 | 357 | u32 msk; |
04c17aa8 TM |
358 | |
359 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
360 | if (chip == NULL) | |
361 | return -ENOMEM; | |
362 | ||
363 | chip->dev = &pdev->dev; | |
364 | ret = pci_enable_device(pdev); | |
365 | if (ret) { | |
366 | dev_err(&pdev->dev, "%s : pci_enable_device FAILED", __func__); | |
367 | goto err_pci_enable; | |
368 | } | |
369 | ||
370 | ret = pci_request_regions(pdev, KBUILD_MODNAME); | |
371 | if (ret) { | |
372 | dev_err(&pdev->dev, "pci_request_regions FAILED-%d", ret); | |
373 | goto err_request_regions; | |
374 | } | |
375 | ||
376 | chip->base = pci_iomap(pdev, 1, 0); | |
c4addcb5 | 377 | if (!chip->base) { |
04c17aa8 TM |
378 | dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__); |
379 | ret = -ENOMEM; | |
380 | goto err_iomap; | |
381 | } | |
382 | ||
d4260e6d TM |
383 | if (pdev->device == 0x8803) |
384 | chip->ioh = INTEL_EG20T_PCH; | |
385 | else if (pdev->device == 0x8014) | |
386 | chip->ioh = OKISEMI_ML7223m_IOH; | |
387 | else if (pdev->device == 0x8043) | |
388 | chip->ioh = OKISEMI_ML7223n_IOH; | |
389 | ||
04c17aa8 TM |
390 | chip->reg = chip->base; |
391 | pci_set_drvdata(pdev, chip); | |
d166370a | 392 | spin_lock_init(&chip->spinlock); |
04c17aa8 TM |
393 | pch_gpio_setup(chip); |
394 | ret = gpiochip_add(&chip->gpio); | |
395 | if (ret) { | |
396 | dev_err(&pdev->dev, "PCH gpio: Failed to register GPIO\n"); | |
397 | goto err_gpiochip_add; | |
398 | } | |
399 | ||
2824bc9c | 400 | irq_base = irq_alloc_descs(-1, 0, gpio_pins[chip->ioh], NUMA_NO_NODE); |
38eb18a6 TM |
401 | if (irq_base < 0) { |
402 | dev_warn(&pdev->dev, "PCH gpio: Failed to get IRQ base num\n"); | |
403 | chip->irq_base = -1; | |
404 | goto end; | |
405 | } | |
406 | chip->irq_base = irq_base; | |
407 | ||
df9541a6 TG |
408 | /* Mask all interrupts, but enable them */ |
409 | msk = (1 << gpio_pins[chip->ioh]) - 1; | |
410 | iowrite32(msk, &chip->reg->imask); | |
411 | iowrite32(msk, &chip->reg->ien); | |
412 | ||
38eb18a6 | 413 | ret = request_irq(pdev->irq, pch_gpio_handler, |
df9541a6 | 414 | IRQF_SHARED, KBUILD_MODNAME, chip); |
38eb18a6 TM |
415 | if (ret != 0) { |
416 | dev_err(&pdev->dev, | |
417 | "%s request_irq failed\n", __func__); | |
418 | goto err_request_irq; | |
419 | } | |
420 | ||
421 | pch_gpio_alloc_generic_chip(chip, irq_base, gpio_pins[chip->ioh]); | |
422 | ||
38eb18a6 | 423 | end: |
04c17aa8 TM |
424 | return 0; |
425 | ||
38eb18a6 TM |
426 | err_request_irq: |
427 | irq_free_descs(irq_base, gpio_pins[chip->ioh]); | |
428 | ||
cfb10898 | 429 | if (gpiochip_remove(&chip->gpio)) |
38eb18a6 TM |
430 | dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__); |
431 | ||
04c17aa8 TM |
432 | err_gpiochip_add: |
433 | pci_iounmap(pdev, chip->base); | |
434 | ||
435 | err_iomap: | |
436 | pci_release_regions(pdev); | |
437 | ||
438 | err_request_regions: | |
439 | pci_disable_device(pdev); | |
440 | ||
441 | err_pci_enable: | |
442 | kfree(chip); | |
443 | dev_err(&pdev->dev, "%s Failed returns %d\n", __func__, ret); | |
444 | return ret; | |
445 | } | |
446 | ||
206210ce | 447 | static void pch_gpio_remove(struct pci_dev *pdev) |
04c17aa8 TM |
448 | { |
449 | int err; | |
450 | struct pch_gpio *chip = pci_get_drvdata(pdev); | |
451 | ||
38eb18a6 TM |
452 | if (chip->irq_base != -1) { |
453 | free_irq(pdev->irq, chip); | |
454 | ||
455 | irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]); | |
456 | } | |
457 | ||
04c17aa8 TM |
458 | err = gpiochip_remove(&chip->gpio); |
459 | if (err) | |
460 | dev_err(&pdev->dev, "Failed gpiochip_remove\n"); | |
461 | ||
462 | pci_iounmap(pdev, chip->base); | |
463 | pci_release_regions(pdev); | |
464 | pci_disable_device(pdev); | |
465 | kfree(chip); | |
466 | } | |
467 | ||
468 | #ifdef CONFIG_PM | |
469 | static int pch_gpio_suspend(struct pci_dev *pdev, pm_message_t state) | |
470 | { | |
471 | s32 ret; | |
472 | struct pch_gpio *chip = pci_get_drvdata(pdev); | |
d568a681 | 473 | unsigned long flags; |
04c17aa8 | 474 | |
d568a681 | 475 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 | 476 | pch_gpio_save_reg_conf(chip); |
d568a681 | 477 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
478 | |
479 | ret = pci_save_state(pdev); | |
480 | if (ret) { | |
481 | dev_err(&pdev->dev, "pci_save_state Failed-%d\n", ret); | |
482 | return ret; | |
483 | } | |
484 | pci_disable_device(pdev); | |
485 | pci_set_power_state(pdev, PCI_D0); | |
486 | ret = pci_enable_wake(pdev, PCI_D0, 1); | |
487 | if (ret) | |
488 | dev_err(&pdev->dev, "pci_enable_wake Failed -%d\n", ret); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int pch_gpio_resume(struct pci_dev *pdev) | |
494 | { | |
495 | s32 ret; | |
496 | struct pch_gpio *chip = pci_get_drvdata(pdev); | |
d568a681 | 497 | unsigned long flags; |
04c17aa8 TM |
498 | |
499 | ret = pci_enable_wake(pdev, PCI_D0, 0); | |
500 | ||
501 | pci_set_power_state(pdev, PCI_D0); | |
502 | ret = pci_enable_device(pdev); | |
503 | if (ret) { | |
504 | dev_err(&pdev->dev, "pci_enable_device Failed-%d ", ret); | |
505 | return ret; | |
506 | } | |
507 | pci_restore_state(pdev); | |
508 | ||
d568a681 | 509 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 TM |
510 | iowrite32(0x01, &chip->reg->reset); |
511 | iowrite32(0x00, &chip->reg->reset); | |
512 | pch_gpio_restore_reg_conf(chip); | |
d568a681 | 513 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
514 | |
515 | return 0; | |
516 | } | |
517 | #else | |
518 | #define pch_gpio_suspend NULL | |
519 | #define pch_gpio_resume NULL | |
520 | #endif | |
521 | ||
bc786cce | 522 | #define PCI_VENDOR_ID_ROHM 0x10DB |
14f4a883 | 523 | static const struct pci_device_id pch_gpio_pcidev_id[] = { |
04c17aa8 | 524 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8803) }, |
bc786cce | 525 | { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8014) }, |
c3520a1a | 526 | { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8043) }, |
868fea05 | 527 | { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8803) }, |
04c17aa8 TM |
528 | { 0, } |
529 | }; | |
19234cdd | 530 | MODULE_DEVICE_TABLE(pci, pch_gpio_pcidev_id); |
04c17aa8 TM |
531 | |
532 | static struct pci_driver pch_gpio_driver = { | |
533 | .name = "pch_gpio", | |
534 | .id_table = pch_gpio_pcidev_id, | |
535 | .probe = pch_gpio_probe, | |
8283c4ff | 536 | .remove = pch_gpio_remove, |
04c17aa8 TM |
537 | .suspend = pch_gpio_suspend, |
538 | .resume = pch_gpio_resume | |
539 | }; | |
540 | ||
93baa65f | 541 | module_pci_driver(pch_gpio_driver); |
04c17aa8 TM |
542 | |
543 | MODULE_DESCRIPTION("PCH GPIO PCI Driver"); | |
544 | MODULE_LICENSE("GPL"); |