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> | |
349b6c53 | 23 | #include <linux/slab.h> |
38eb18a6 TM |
24 | |
25 | #define PCH_EDGE_FALLING 0 | |
26 | #define PCH_EDGE_RISING BIT(0) | |
27 | #define PCH_LEVEL_L BIT(1) | |
28 | #define PCH_LEVEL_H (BIT(0) | BIT(1)) | |
29 | #define PCH_EDGE_BOTH BIT(2) | |
30 | #define PCH_IM_MASK (BIT(0) | BIT(1) | BIT(2)) | |
31 | ||
32 | #define PCH_IRQ_BASE 24 | |
04c17aa8 | 33 | |
04c17aa8 TM |
34 | struct pch_regs { |
35 | u32 ien; | |
36 | u32 istatus; | |
37 | u32 idisp; | |
38 | u32 iclr; | |
39 | u32 imask; | |
40 | u32 imaskclr; | |
41 | u32 po; | |
42 | u32 pi; | |
43 | u32 pm; | |
44 | u32 im0; | |
45 | u32 im1; | |
e98bed7f TM |
46 | u32 reserved[3]; |
47 | u32 gpio_use_sel; | |
04c17aa8 TM |
48 | u32 reset; |
49 | }; | |
50 | ||
d4260e6d TM |
51 | enum pch_type_t { |
52 | INTEL_EG20T_PCH, | |
f4574beb TM |
53 | OKISEMI_ML7223m_IOH, /* LAPIS Semiconductor ML7223 IOH PCIe Bus-m */ |
54 | OKISEMI_ML7223n_IOH /* LAPIS Semiconductor ML7223 IOH PCIe Bus-n */ | |
d4260e6d TM |
55 | }; |
56 | ||
57 | /* Specifies number of GPIO PINS */ | |
58 | static int gpio_pins[] = { | |
59 | [INTEL_EG20T_PCH] = 12, | |
60 | [OKISEMI_ML7223m_IOH] = 8, | |
61 | [OKISEMI_ML7223n_IOH] = 8, | |
62 | }; | |
63 | ||
04c17aa8 TM |
64 | /** |
65 | * struct pch_gpio_reg_data - The register store data. | |
38eb18a6 TM |
66 | * @ien_reg: To store contents of IEN register. |
67 | * @imask_reg: To store contents of IMASK register. | |
04c17aa8 TM |
68 | * @po_reg: To store contents of PO register. |
69 | * @pm_reg: To store contents of PM register. | |
e98bed7f TM |
70 | * @im0_reg: To store contents of IM0 register. |
71 | * @im1_reg: To store contents of IM1 register. | |
72 | * @gpio_use_sel_reg : To store contents of GPIO_USE_SEL register. | |
73 | * (Only ML7223 Bus-n) | |
04c17aa8 TM |
74 | */ |
75 | struct pch_gpio_reg_data { | |
38eb18a6 TM |
76 | u32 ien_reg; |
77 | u32 imask_reg; | |
04c17aa8 TM |
78 | u32 po_reg; |
79 | u32 pm_reg; | |
e98bed7f TM |
80 | u32 im0_reg; |
81 | u32 im1_reg; | |
82 | u32 gpio_use_sel_reg; | |
04c17aa8 TM |
83 | }; |
84 | ||
85 | /** | |
86 | * struct pch_gpio - GPIO private data structure. | |
87 | * @base: PCI base address of Memory mapped I/O register. | |
88 | * @reg: Memory mapped PCH GPIO register list. | |
89 | * @dev: Pointer to device structure. | |
90 | * @gpio: Data for GPIO infrastructure. | |
91 | * @pch_gpio_reg: Memory mapped Register data is saved here | |
92 | * when suspend. | |
38eb18a6 TM |
93 | * @lock: Used for register access protection |
94 | * @irq_base: Save base of IRQ number for interrupt | |
d4260e6d | 95 | * @ioh: IOH ID |
7cb6580c | 96 | * @spinlock: Used for register access protection |
04c17aa8 TM |
97 | */ |
98 | struct pch_gpio { | |
99 | void __iomem *base; | |
100 | struct pch_regs __iomem *reg; | |
101 | struct device *dev; | |
102 | struct gpio_chip gpio; | |
103 | struct pch_gpio_reg_data pch_gpio_reg; | |
38eb18a6 | 104 | int irq_base; |
d4260e6d | 105 | enum pch_type_t ioh; |
d568a681 | 106 | spinlock_t spinlock; |
04c17aa8 TM |
107 | }; |
108 | ||
109 | static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) | |
110 | { | |
111 | u32 reg_val; | |
112 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
7cb6580c | 113 | unsigned long flags; |
04c17aa8 | 114 | |
7cb6580c | 115 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 TM |
116 | reg_val = ioread32(&chip->reg->po); |
117 | if (val) | |
118 | reg_val |= (1 << nr); | |
119 | else | |
120 | reg_val &= ~(1 << nr); | |
121 | ||
122 | iowrite32(reg_val, &chip->reg->po); | |
7cb6580c | 123 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
124 | } |
125 | ||
126 | static int pch_gpio_get(struct gpio_chip *gpio, unsigned nr) | |
127 | { | |
128 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
129 | ||
130 | return ioread32(&chip->reg->pi) & (1 << nr); | |
131 | } | |
132 | ||
133 | static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, | |
134 | int val) | |
135 | { | |
136 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
137 | u32 pm; | |
138 | u32 reg_val; | |
7cb6580c | 139 | unsigned long flags; |
04c17aa8 | 140 | |
7cb6580c | 141 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 TM |
142 | |
143 | reg_val = ioread32(&chip->reg->po); | |
144 | if (val) | |
145 | reg_val |= (1 << nr); | |
146 | else | |
147 | reg_val &= ~(1 << nr); | |
88aab934 | 148 | iowrite32(reg_val, &chip->reg->po); |
2ddf6cd6 DK |
149 | |
150 | pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); | |
151 | pm |= (1 << nr); | |
152 | iowrite32(pm, &chip->reg->pm); | |
153 | ||
7cb6580c | 154 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
155 | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) | |
160 | { | |
161 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
162 | u32 pm; | |
7cb6580c | 163 | unsigned long flags; |
04c17aa8 | 164 | |
7cb6580c | 165 | spin_lock_irqsave(&chip->spinlock, flags); |
d4260e6d | 166 | pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); |
04c17aa8 TM |
167 | pm &= ~(1 << nr); |
168 | iowrite32(pm, &chip->reg->pm); | |
7cb6580c | 169 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
170 | |
171 | return 0; | |
172 | } | |
173 | ||
174 | /* | |
175 | * Save register configuration and disable interrupts. | |
176 | */ | |
177 | static void pch_gpio_save_reg_conf(struct pch_gpio *chip) | |
178 | { | |
38eb18a6 TM |
179 | chip->pch_gpio_reg.ien_reg = ioread32(&chip->reg->ien); |
180 | chip->pch_gpio_reg.imask_reg = ioread32(&chip->reg->imask); | |
04c17aa8 TM |
181 | chip->pch_gpio_reg.po_reg = ioread32(&chip->reg->po); |
182 | chip->pch_gpio_reg.pm_reg = ioread32(&chip->reg->pm); | |
e98bed7f TM |
183 | chip->pch_gpio_reg.im0_reg = ioread32(&chip->reg->im0); |
184 | if (chip->ioh == INTEL_EG20T_PCH) | |
185 | chip->pch_gpio_reg.im1_reg = ioread32(&chip->reg->im1); | |
186 | if (chip->ioh == OKISEMI_ML7223n_IOH) | |
187 | chip->pch_gpio_reg.gpio_use_sel_reg =\ | |
188 | ioread32(&chip->reg->gpio_use_sel); | |
04c17aa8 TM |
189 | } |
190 | ||
191 | /* | |
192 | * This function restores the register configuration of the GPIO device. | |
193 | */ | |
194 | static void pch_gpio_restore_reg_conf(struct pch_gpio *chip) | |
195 | { | |
38eb18a6 TM |
196 | iowrite32(chip->pch_gpio_reg.ien_reg, &chip->reg->ien); |
197 | iowrite32(chip->pch_gpio_reg.imask_reg, &chip->reg->imask); | |
04c17aa8 TM |
198 | /* to store contents of PO register */ |
199 | iowrite32(chip->pch_gpio_reg.po_reg, &chip->reg->po); | |
200 | /* to store contents of PM register */ | |
201 | iowrite32(chip->pch_gpio_reg.pm_reg, &chip->reg->pm); | |
e98bed7f TM |
202 | iowrite32(chip->pch_gpio_reg.im0_reg, &chip->reg->im0); |
203 | if (chip->ioh == INTEL_EG20T_PCH) | |
204 | iowrite32(chip->pch_gpio_reg.im1_reg, &chip->reg->im1); | |
205 | if (chip->ioh == OKISEMI_ML7223n_IOH) | |
206 | iowrite32(chip->pch_gpio_reg.gpio_use_sel_reg, | |
207 | &chip->reg->gpio_use_sel); | |
04c17aa8 TM |
208 | } |
209 | ||
38eb18a6 TM |
210 | static int pch_gpio_to_irq(struct gpio_chip *gpio, unsigned offset) |
211 | { | |
212 | struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); | |
213 | return chip->irq_base + offset; | |
214 | } | |
215 | ||
04c17aa8 TM |
216 | static void pch_gpio_setup(struct pch_gpio *chip) |
217 | { | |
218 | struct gpio_chip *gpio = &chip->gpio; | |
219 | ||
220 | gpio->label = dev_name(chip->dev); | |
5c868fc6 | 221 | gpio->dev = chip->dev; |
04c17aa8 TM |
222 | gpio->owner = THIS_MODULE; |
223 | gpio->direction_input = pch_gpio_direction_input; | |
224 | gpio->get = pch_gpio_get; | |
225 | gpio->direction_output = pch_gpio_direction_output; | |
226 | gpio->set = pch_gpio_set; | |
227 | gpio->dbg_show = NULL; | |
228 | gpio->base = -1; | |
d4260e6d | 229 | gpio->ngpio = gpio_pins[chip->ioh]; |
9fb1f39e | 230 | gpio->can_sleep = false; |
38eb18a6 TM |
231 | gpio->to_irq = pch_gpio_to_irq; |
232 | } | |
233 | ||
234 | static int pch_irq_type(struct irq_data *d, unsigned int type) | |
235 | { | |
38eb18a6 TM |
236 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); |
237 | struct pch_gpio *chip = gc->private; | |
df9541a6 TG |
238 | u32 im, im_pos, val; |
239 | u32 __iomem *im_reg; | |
240 | unsigned long flags; | |
241 | int ch, irq = d->irq; | |
38eb18a6 TM |
242 | |
243 | ch = irq - chip->irq_base; | |
244 | if (irq <= chip->irq_base + 7) { | |
245 | im_reg = &chip->reg->im0; | |
246 | im_pos = ch; | |
247 | } else { | |
248 | im_reg = &chip->reg->im1; | |
249 | im_pos = ch - 8; | |
250 | } | |
251 | dev_dbg(chip->dev, "%s:irq=%d type=%d ch=%d pos=%d\n", | |
252 | __func__, irq, type, ch, im_pos); | |
253 | ||
254 | spin_lock_irqsave(&chip->spinlock, flags); | |
255 | ||
256 | switch (type) { | |
257 | case IRQ_TYPE_EDGE_RISING: | |
258 | val = PCH_EDGE_RISING; | |
259 | break; | |
260 | case IRQ_TYPE_EDGE_FALLING: | |
261 | val = PCH_EDGE_FALLING; | |
262 | break; | |
263 | case IRQ_TYPE_EDGE_BOTH: | |
264 | val = PCH_EDGE_BOTH; | |
265 | break; | |
266 | case IRQ_TYPE_LEVEL_HIGH: | |
267 | val = PCH_LEVEL_H; | |
268 | break; | |
269 | case IRQ_TYPE_LEVEL_LOW: | |
270 | val = PCH_LEVEL_L; | |
271 | break; | |
38eb18a6 | 272 | default: |
df9541a6 | 273 | goto unlock; |
38eb18a6 TM |
274 | } |
275 | ||
276 | /* Set interrupt mode */ | |
277 | im = ioread32(im_reg) & ~(PCH_IM_MASK << (im_pos * 4)); | |
278 | iowrite32(im | (val << (im_pos * 4)), im_reg); | |
279 | ||
df9541a6 TG |
280 | /* And the handler */ |
281 | if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) | |
282 | __irq_set_handler_locked(d->irq, handle_level_irq); | |
283 | else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) | |
284 | __irq_set_handler_locked(d->irq, handle_edge_irq); | |
38eb18a6 | 285 | |
df9541a6 | 286 | unlock: |
38eb18a6 | 287 | spin_unlock_irqrestore(&chip->spinlock, flags); |
38eb18a6 TM |
288 | return 0; |
289 | } | |
290 | ||
291 | static void pch_irq_unmask(struct irq_data *d) | |
292 | { | |
293 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); | |
294 | struct pch_gpio *chip = gc->private; | |
295 | ||
296 | iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imaskclr); | |
297 | } | |
298 | ||
299 | static void pch_irq_mask(struct irq_data *d) | |
300 | { | |
301 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); | |
302 | struct pch_gpio *chip = gc->private; | |
303 | ||
304 | iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imask); | |
305 | } | |
306 | ||
df9541a6 TG |
307 | static void pch_irq_ack(struct irq_data *d) |
308 | { | |
309 | struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); | |
310 | struct pch_gpio *chip = gc->private; | |
311 | ||
312 | iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->iclr); | |
313 | } | |
314 | ||
38eb18a6 TM |
315 | static irqreturn_t pch_gpio_handler(int irq, void *dev_id) |
316 | { | |
317 | struct pch_gpio *chip = dev_id; | |
318 | u32 reg_val = ioread32(&chip->reg->istatus); | |
df9541a6 | 319 | int i, ret = IRQ_NONE; |
38eb18a6 TM |
320 | |
321 | for (i = 0; i < gpio_pins[chip->ioh]; i++) { | |
322 | if (reg_val & BIT(i)) { | |
323 | dev_dbg(chip->dev, "%s:[%d]:irq=%d status=0x%x\n", | |
324 | __func__, i, irq, reg_val); | |
38eb18a6 TM |
325 | generic_handle_irq(chip->irq_base + i); |
326 | ret = IRQ_HANDLED; | |
327 | } | |
328 | } | |
329 | return ret; | |
330 | } | |
331 | ||
3836309d | 332 | static void pch_gpio_alloc_generic_chip(struct pch_gpio *chip, |
38eb18a6 TM |
333 | unsigned int irq_start, unsigned int num) |
334 | { | |
335 | struct irq_chip_generic *gc; | |
336 | struct irq_chip_type *ct; | |
337 | ||
338 | gc = irq_alloc_generic_chip("pch_gpio", 1, irq_start, chip->base, | |
339 | handle_simple_irq); | |
340 | gc->private = chip; | |
341 | ct = gc->chip_types; | |
342 | ||
df9541a6 | 343 | ct->chip.irq_ack = pch_irq_ack; |
38eb18a6 TM |
344 | ct->chip.irq_mask = pch_irq_mask; |
345 | ct->chip.irq_unmask = pch_irq_unmask; | |
346 | ct->chip.irq_set_type = pch_irq_type; | |
347 | ||
348 | irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, | |
349 | IRQ_NOREQUEST | IRQ_NOPROBE, 0); | |
04c17aa8 TM |
350 | } |
351 | ||
3836309d | 352 | static int pch_gpio_probe(struct pci_dev *pdev, |
04c17aa8 TM |
353 | const struct pci_device_id *id) |
354 | { | |
355 | s32 ret; | |
356 | struct pch_gpio *chip; | |
38eb18a6 | 357 | int irq_base; |
df9541a6 | 358 | u32 msk; |
04c17aa8 TM |
359 | |
360 | chip = kzalloc(sizeof(*chip), GFP_KERNEL); | |
361 | if (chip == NULL) | |
362 | return -ENOMEM; | |
363 | ||
364 | chip->dev = &pdev->dev; | |
365 | ret = pci_enable_device(pdev); | |
366 | if (ret) { | |
367 | dev_err(&pdev->dev, "%s : pci_enable_device FAILED", __func__); | |
368 | goto err_pci_enable; | |
369 | } | |
370 | ||
371 | ret = pci_request_regions(pdev, KBUILD_MODNAME); | |
372 | if (ret) { | |
373 | dev_err(&pdev->dev, "pci_request_regions FAILED-%d", ret); | |
374 | goto err_request_regions; | |
375 | } | |
376 | ||
377 | chip->base = pci_iomap(pdev, 1, 0); | |
c4addcb5 | 378 | if (!chip->base) { |
04c17aa8 TM |
379 | dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__); |
380 | ret = -ENOMEM; | |
381 | goto err_iomap; | |
382 | } | |
383 | ||
d4260e6d TM |
384 | if (pdev->device == 0x8803) |
385 | chip->ioh = INTEL_EG20T_PCH; | |
386 | else if (pdev->device == 0x8014) | |
387 | chip->ioh = OKISEMI_ML7223m_IOH; | |
388 | else if (pdev->device == 0x8043) | |
389 | chip->ioh = OKISEMI_ML7223n_IOH; | |
390 | ||
04c17aa8 TM |
391 | chip->reg = chip->base; |
392 | pci_set_drvdata(pdev, chip); | |
d166370a | 393 | spin_lock_init(&chip->spinlock); |
04c17aa8 TM |
394 | pch_gpio_setup(chip); |
395 | ret = gpiochip_add(&chip->gpio); | |
396 | if (ret) { | |
397 | dev_err(&pdev->dev, "PCH gpio: Failed to register GPIO\n"); | |
398 | goto err_gpiochip_add; | |
399 | } | |
400 | ||
2824bc9c | 401 | irq_base = irq_alloc_descs(-1, 0, gpio_pins[chip->ioh], NUMA_NO_NODE); |
38eb18a6 TM |
402 | if (irq_base < 0) { |
403 | dev_warn(&pdev->dev, "PCH gpio: Failed to get IRQ base num\n"); | |
404 | chip->irq_base = -1; | |
405 | goto end; | |
406 | } | |
407 | chip->irq_base = irq_base; | |
408 | ||
df9541a6 TG |
409 | /* Mask all interrupts, but enable them */ |
410 | msk = (1 << gpio_pins[chip->ioh]) - 1; | |
411 | iowrite32(msk, &chip->reg->imask); | |
412 | iowrite32(msk, &chip->reg->ien); | |
413 | ||
38eb18a6 | 414 | ret = request_irq(pdev->irq, pch_gpio_handler, |
df9541a6 | 415 | IRQF_SHARED, KBUILD_MODNAME, chip); |
38eb18a6 TM |
416 | if (ret != 0) { |
417 | dev_err(&pdev->dev, | |
418 | "%s request_irq failed\n", __func__); | |
419 | goto err_request_irq; | |
420 | } | |
421 | ||
422 | pch_gpio_alloc_generic_chip(chip, irq_base, gpio_pins[chip->ioh]); | |
423 | ||
38eb18a6 | 424 | end: |
04c17aa8 TM |
425 | return 0; |
426 | ||
38eb18a6 TM |
427 | err_request_irq: |
428 | irq_free_descs(irq_base, gpio_pins[chip->ioh]); | |
429 | ||
cfb10898 | 430 | if (gpiochip_remove(&chip->gpio)) |
38eb18a6 TM |
431 | dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__); |
432 | ||
04c17aa8 TM |
433 | err_gpiochip_add: |
434 | pci_iounmap(pdev, chip->base); | |
435 | ||
436 | err_iomap: | |
437 | pci_release_regions(pdev); | |
438 | ||
439 | err_request_regions: | |
440 | pci_disable_device(pdev); | |
441 | ||
442 | err_pci_enable: | |
443 | kfree(chip); | |
444 | dev_err(&pdev->dev, "%s Failed returns %d\n", __func__, ret); | |
445 | return ret; | |
446 | } | |
447 | ||
206210ce | 448 | static void pch_gpio_remove(struct pci_dev *pdev) |
04c17aa8 TM |
449 | { |
450 | int err; | |
451 | struct pch_gpio *chip = pci_get_drvdata(pdev); | |
452 | ||
38eb18a6 TM |
453 | if (chip->irq_base != -1) { |
454 | free_irq(pdev->irq, chip); | |
455 | ||
456 | irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]); | |
457 | } | |
458 | ||
04c17aa8 TM |
459 | err = gpiochip_remove(&chip->gpio); |
460 | if (err) | |
461 | dev_err(&pdev->dev, "Failed gpiochip_remove\n"); | |
462 | ||
463 | pci_iounmap(pdev, chip->base); | |
464 | pci_release_regions(pdev); | |
465 | pci_disable_device(pdev); | |
466 | kfree(chip); | |
467 | } | |
468 | ||
469 | #ifdef CONFIG_PM | |
470 | static int pch_gpio_suspend(struct pci_dev *pdev, pm_message_t state) | |
471 | { | |
472 | s32 ret; | |
473 | struct pch_gpio *chip = pci_get_drvdata(pdev); | |
d568a681 | 474 | unsigned long flags; |
04c17aa8 | 475 | |
d568a681 | 476 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 | 477 | pch_gpio_save_reg_conf(chip); |
d568a681 | 478 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
479 | |
480 | ret = pci_save_state(pdev); | |
481 | if (ret) { | |
482 | dev_err(&pdev->dev, "pci_save_state Failed-%d\n", ret); | |
483 | return ret; | |
484 | } | |
485 | pci_disable_device(pdev); | |
486 | pci_set_power_state(pdev, PCI_D0); | |
487 | ret = pci_enable_wake(pdev, PCI_D0, 1); | |
488 | if (ret) | |
489 | dev_err(&pdev->dev, "pci_enable_wake Failed -%d\n", ret); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static int pch_gpio_resume(struct pci_dev *pdev) | |
495 | { | |
496 | s32 ret; | |
497 | struct pch_gpio *chip = pci_get_drvdata(pdev); | |
d568a681 | 498 | unsigned long flags; |
04c17aa8 TM |
499 | |
500 | ret = pci_enable_wake(pdev, PCI_D0, 0); | |
501 | ||
502 | pci_set_power_state(pdev, PCI_D0); | |
503 | ret = pci_enable_device(pdev); | |
504 | if (ret) { | |
505 | dev_err(&pdev->dev, "pci_enable_device Failed-%d ", ret); | |
506 | return ret; | |
507 | } | |
508 | pci_restore_state(pdev); | |
509 | ||
d568a681 | 510 | spin_lock_irqsave(&chip->spinlock, flags); |
04c17aa8 TM |
511 | iowrite32(0x01, &chip->reg->reset); |
512 | iowrite32(0x00, &chip->reg->reset); | |
513 | pch_gpio_restore_reg_conf(chip); | |
d568a681 | 514 | spin_unlock_irqrestore(&chip->spinlock, flags); |
04c17aa8 TM |
515 | |
516 | return 0; | |
517 | } | |
518 | #else | |
519 | #define pch_gpio_suspend NULL | |
520 | #define pch_gpio_resume NULL | |
521 | #endif | |
522 | ||
bc786cce | 523 | #define PCI_VENDOR_ID_ROHM 0x10DB |
14f4a883 | 524 | static const struct pci_device_id pch_gpio_pcidev_id[] = { |
04c17aa8 | 525 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8803) }, |
bc786cce | 526 | { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8014) }, |
c3520a1a | 527 | { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8043) }, |
868fea05 | 528 | { PCI_DEVICE(PCI_VENDOR_ID_ROHM, 0x8803) }, |
04c17aa8 TM |
529 | { 0, } |
530 | }; | |
19234cdd | 531 | MODULE_DEVICE_TABLE(pci, pch_gpio_pcidev_id); |
04c17aa8 TM |
532 | |
533 | static struct pci_driver pch_gpio_driver = { | |
534 | .name = "pch_gpio", | |
535 | .id_table = pch_gpio_pcidev_id, | |
536 | .probe = pch_gpio_probe, | |
8283c4ff | 537 | .remove = pch_gpio_remove, |
04c17aa8 TM |
538 | .suspend = pch_gpio_suspend, |
539 | .resume = pch_gpio_resume | |
540 | }; | |
541 | ||
93baa65f | 542 | module_pci_driver(pch_gpio_driver); |
04c17aa8 TM |
543 | |
544 | MODULE_DESCRIPTION("PCH GPIO PCI Driver"); | |
545 | MODULE_LICENSE("GPL"); |