blob: d70a343078fd5934ab1fff9732caed67a32b095c [file] [log] [blame]
Alessandro Rubini35bdd292012-04-12 10:48:44 +02001/*
2 * Copyright (c) 2009-2011 Wind River Systems, Inc.
Davide Ciminaghib73df692012-11-09 15:20:01 +01003 * Copyright (c) 2011 ST Microelectronics (Alessandro Rubini, Davide Ciminaghi)
Alessandro Rubini35bdd292012-04-12 10:48:44 +02004 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * See the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 */
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/spinlock.h>
23#include <linux/errno.h>
24#include <linux/device.h>
25#include <linux/slab.h>
26#include <linux/list.h>
27#include <linux/io.h>
28#include <linux/ioport.h>
29#include <linux/pci.h>
Alessandro Rubini35bdd292012-04-12 10:48:44 +020030#include <linux/seq_file.h>
31#include <linux/platform_device.h>
32#include <linux/mfd/core.h>
33#include <linux/mfd/sta2x11-mfd.h>
Davide Ciminaghid94e2552012-11-09 15:19:53 +010034#include <linux/regmap.h>
Alessandro Rubini35bdd292012-04-12 10:48:44 +020035
36#include <asm/sta2x11.h>
37
Davide Ciminaghid94e2552012-11-09 15:19:53 +010038static inline int __reg_within_range(unsigned int r,
39 unsigned int start,
40 unsigned int end)
41{
42 return ((r >= start) && (r <= end));
43}
44
Alessandro Rubini35bdd292012-04-12 10:48:44 +020045/* This describes STA2X11 MFD chip for us, we may have several */
46struct sta2x11_mfd {
47 struct sta2x11_instance *instance;
Davide Ciminaghid94e2552012-11-09 15:19:53 +010048 struct regmap *regmap[sta2x11_n_mfd_plat_devs];
Davide Ciminaghie885ba292012-11-09 15:19:58 +010049 spinlock_t lock[sta2x11_n_mfd_plat_devs];
Alessandro Rubini35bdd292012-04-12 10:48:44 +020050 struct list_head list;
Davide Ciminaghi1950c712012-11-09 15:19:52 +010051 void __iomem *regs[sta2x11_n_mfd_plat_devs];
Alessandro Rubini35bdd292012-04-12 10:48:44 +020052};
53
54static LIST_HEAD(sta2x11_mfd_list);
55
56/* Three functions to act on the list */
57static struct sta2x11_mfd *sta2x11_mfd_find(struct pci_dev *pdev)
58{
59 struct sta2x11_instance *instance;
60 struct sta2x11_mfd *mfd;
61
62 if (!pdev && !list_empty(&sta2x11_mfd_list)) {
63 pr_warning("%s: Unspecified device, "
64 "using first instance\n", __func__);
65 return list_entry(sta2x11_mfd_list.next,
66 struct sta2x11_mfd, list);
67 }
68
69 instance = sta2x11_get_instance(pdev);
70 if (!instance)
71 return NULL;
72 list_for_each_entry(mfd, &sta2x11_mfd_list, list) {
73 if (mfd->instance == instance)
74 return mfd;
75 }
76 return NULL;
77}
78
Bill Pembertonf791be42012-11-19 13:23:04 -050079static int sta2x11_mfd_add(struct pci_dev *pdev, gfp_t flags)
Alessandro Rubini35bdd292012-04-12 10:48:44 +020080{
Davide Ciminaghie885ba292012-11-09 15:19:58 +010081 int i;
Alessandro Rubini35bdd292012-04-12 10:48:44 +020082 struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
83 struct sta2x11_instance *instance;
84
85 if (mfd)
86 return -EBUSY;
87 instance = sta2x11_get_instance(pdev);
88 if (!instance)
89 return -EINVAL;
90 mfd = kzalloc(sizeof(*mfd), flags);
91 if (!mfd)
92 return -ENOMEM;
93 INIT_LIST_HEAD(&mfd->list);
Davide Ciminaghie885ba292012-11-09 15:19:58 +010094 for (i = 0; i < ARRAY_SIZE(mfd->lock); i++)
95 spin_lock_init(&mfd->lock[i]);
Alessandro Rubini35bdd292012-04-12 10:48:44 +020096 mfd->instance = instance;
97 list_add(&mfd->list, &sta2x11_mfd_list);
98 return 0;
99}
100
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100101/* This function is exported and is not expected to fail */
102u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
103 enum sta2x11_mfd_plat_dev index)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200104{
105 struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
106 u32 r;
107 unsigned long flags;
Wei Yongjun709edec2012-12-02 08:36:22 -0500108 void __iomem *regs;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200109
110 if (!mfd) {
111 dev_warn(&pdev->dev, ": can't access sctl regs\n");
112 return 0;
113 }
Wei Yongjun709edec2012-12-02 08:36:22 -0500114
115 regs = mfd->regs[index];
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100116 if (!regs) {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200117 dev_warn(&pdev->dev, ": system ctl not initialized\n");
118 return 0;
119 }
Davide Ciminaghie885ba292012-11-09 15:19:58 +0100120 spin_lock_irqsave(&mfd->lock[index], flags);
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100121 r = readl(regs + reg);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200122 r &= ~mask;
123 r |= val;
124 if (mask)
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100125 writel(r, regs + reg);
Davide Ciminaghie885ba292012-11-09 15:19:58 +0100126 spin_unlock_irqrestore(&mfd->lock[index], flags);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200127 return r;
128}
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100129EXPORT_SYMBOL(__sta2x11_mfd_mask);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200130
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100131int sta2x11_mfd_get_regs_data(struct platform_device *dev,
132 enum sta2x11_mfd_plat_dev index,
133 void __iomem **regs,
134 spinlock_t **lock)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200135{
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100136 struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data);
137 struct sta2x11_mfd *mfd;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200138
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100139 if (!pdev)
140 return -ENODEV;
141 mfd = sta2x11_mfd_find(pdev);
142 if (!mfd)
143 return -ENODEV;
144 if (index >= sta2x11_n_mfd_plat_devs)
145 return -ENODEV;
146 *regs = mfd->regs[index];
147 *lock = &mfd->lock[index];
148 pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs);
149 return *regs ? 0 : -ENODEV;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200150}
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100151EXPORT_SYMBOL(sta2x11_mfd_get_regs_data);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200152
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100153/*
154 * Special sta2x11-mfd regmap lock/unlock functions
155 */
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200156
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100157static void sta2x11_regmap_lock(void *__lock)
158{
159 spinlock_t *lock = __lock;
160 spin_lock(lock);
161}
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200162
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100163static void sta2x11_regmap_unlock(void *__lock)
164{
165 spinlock_t *lock = __lock;
166 spin_unlock(lock);
167}
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100168
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100169/* OTP (one time programmable registers do not require locking */
170static void sta2x11_regmap_nolock(void *__lock)
171{
172}
173
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100174static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100175 [sta2x11_sctl] = STA2X11_MFD_SCTL_NAME,
176 [sta2x11_apbreg] = STA2X11_MFD_APBREG_NAME,
177 [sta2x11_apb_soc_regs] = STA2X11_MFD_APB_SOC_REGS_NAME,
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100178 [sta2x11_scr] = STA2X11_MFD_SCR_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200179};
180
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100181static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg)
182{
183 return !__reg_within_range(reg, SCTL_SCPCIECSBRST, SCTL_SCRSTSTA);
184}
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200185
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100186static struct regmap_config sta2x11_sctl_regmap_config = {
187 .reg_bits = 32,
188 .reg_stride = 4,
189 .val_bits = 32,
190 .lock = sta2x11_regmap_lock,
191 .unlock = sta2x11_regmap_unlock,
192 .max_register = SCTL_SCRSTSTA,
193 .writeable_reg = sta2x11_sctl_writeable_reg,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200194};
195
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100196static bool sta2x11_scr_readable_reg(struct device *dev, unsigned int reg)
197{
198 return (reg == STA2X11_SECR_CR) ||
199 __reg_within_range(reg, STA2X11_SECR_FVR0, STA2X11_SECR_FVR1);
200}
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200201
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100202static bool sta2x11_scr_writeable_reg(struct device *dev, unsigned int reg)
203{
204 return false;
205}
206
207static struct regmap_config sta2x11_scr_regmap_config = {
208 .reg_bits = 32,
209 .reg_stride = 4,
210 .val_bits = 32,
211 .lock = sta2x11_regmap_nolock,
212 .unlock = sta2x11_regmap_nolock,
213 .max_register = STA2X11_SECR_FVR1,
214 .readable_reg = sta2x11_scr_readable_reg,
215 .writeable_reg = sta2x11_scr_writeable_reg,
216};
217
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100218static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg)
219{
220 /* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */
221 if (reg >= APBREG_BSR_SARAC)
222 reg -= APBREG_BSR_SARAC;
223 switch (reg) {
224 case APBREG_BSR:
225 case APBREG_PAER:
226 case APBREG_PWAC:
227 case APBREG_PRAC:
228 case APBREG_PCG:
229 case APBREG_PUR:
230 case APBREG_EMU_PCG:
231 return true;
232 default:
233 return false;
234 }
235}
236
237static bool sta2x11_apbreg_writeable_reg(struct device *dev, unsigned int reg)
238{
239 if (reg >= APBREG_BSR_SARAC)
240 reg -= APBREG_BSR_SARAC;
241 if (!sta2x11_apbreg_readable_reg(dev, reg))
242 return false;
243 return reg != APBREG_PAER;
244}
245
246static struct regmap_config sta2x11_apbreg_regmap_config = {
247 .reg_bits = 32,
248 .reg_stride = 4,
249 .val_bits = 32,
250 .lock = sta2x11_regmap_lock,
251 .unlock = sta2x11_regmap_unlock,
252 .max_register = APBREG_EMU_PCG_SARAC,
253 .readable_reg = sta2x11_apbreg_readable_reg,
254 .writeable_reg = sta2x11_apbreg_writeable_reg,
255};
256
257static bool sta2x11_apb_soc_regs_readable_reg(struct device *dev,
258 unsigned int reg)
259{
260 return reg <= PCIE_SoC_INT_ROUTER_STATUS3_REG ||
261 __reg_within_range(reg, DMA_IP_CTRL_REG, SPARE3_RESERVED) ||
262 __reg_within_range(reg, MASTER_LOCK_REG,
263 SYSTEM_CONFIG_STATUS_REG) ||
264 reg == MSP_CLK_CTRL_REG ||
265 __reg_within_range(reg, COMPENSATION_REG1, TEST_CTL_REG);
266}
267
268static bool sta2x11_apb_soc_regs_writeable_reg(struct device *dev,
269 unsigned int reg)
270{
271 if (!sta2x11_apb_soc_regs_readable_reg(dev, reg))
272 return false;
273 switch (reg) {
274 case PCIE_COMMON_CLOCK_CONFIG_0_4_0:
275 case SYSTEM_CONFIG_STATUS_REG:
276 case COMPENSATION_REG1:
277 case PCIE_SoC_INT_ROUTER_STATUS0_REG...PCIE_SoC_INT_ROUTER_STATUS3_REG:
278 case PCIE_PM_STATUS_0_PORT_0_4...PCIE_PM_STATUS_7_0_EP4:
279 return false;
280 default:
281 return true;
282 }
283}
284
285static struct regmap_config sta2x11_apb_soc_regs_regmap_config = {
286 .reg_bits = 32,
287 .reg_stride = 4,
288 .val_bits = 32,
289 .lock = sta2x11_regmap_lock,
290 .unlock = sta2x11_regmap_unlock,
291 .max_register = TEST_CTL_REG,
292 .readable_reg = sta2x11_apb_soc_regs_readable_reg,
293 .writeable_reg = sta2x11_apb_soc_regs_writeable_reg,
294};
295
296static struct regmap_config *
297sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = {
298 [sta2x11_sctl] = &sta2x11_sctl_regmap_config,
299 [sta2x11_apbreg] = &sta2x11_apbreg_regmap_config,
300 [sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config,
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100301 [sta2x11_scr] = &sta2x11_scr_regmap_config,
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100302};
303
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100304/* Probe for the four platform devices */
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100305
306static int sta2x11_mfd_platform_probe(struct platform_device *dev,
307 enum sta2x11_mfd_plat_dev index)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200308{
309 struct pci_dev **pdev;
310 struct sta2x11_mfd *mfd;
311 struct resource *res;
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100312 const char *name = sta2x11_mfd_names[index];
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100313 struct regmap_config *regmap_config = sta2x11_mfd_regmap_configs[index];
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200314
315 pdev = dev->dev.platform_data;
316 mfd = sta2x11_mfd_find(*pdev);
317 if (!mfd)
318 return -ENODEV;
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100319 if (!regmap_config)
320 return -ENODEV;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200321
322 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
323 if (!res)
324 return -ENOMEM;
325
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100326 if (!request_mem_region(res->start, resource_size(res), name))
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200327 return -EBUSY;
328
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100329 mfd->regs[index] = ioremap(res->start, resource_size(res));
330 if (!mfd->regs[index]) {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200331 release_mem_region(res->start, resource_size(res));
332 return -ENOMEM;
333 }
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100334 regmap_config->lock_arg = &mfd->lock;
335 /*
336 No caching, registers could be reached both via regmap and via
337 void __iomem *
338 */
339 regmap_config->cache_type = REGCACHE_NONE;
340 mfd->regmap[index] = devm_regmap_init_mmio(&dev->dev, mfd->regs[index],
341 regmap_config);
342 WARN_ON(!mfd->regmap[index]);
343
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200344 return 0;
345}
346
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100347static int sta2x11_sctl_probe(struct platform_device *dev)
348{
349 return sta2x11_mfd_platform_probe(dev, sta2x11_sctl);
350}
351
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200352static int sta2x11_apbreg_probe(struct platform_device *dev)
353{
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100354 return sta2x11_mfd_platform_probe(dev, sta2x11_apbreg);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200355}
356
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100357static int sta2x11_apb_soc_regs_probe(struct platform_device *dev)
358{
359 return sta2x11_mfd_platform_probe(dev, sta2x11_apb_soc_regs);
360}
361
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100362static int sta2x11_scr_probe(struct platform_device *dev)
363{
364 return sta2x11_mfd_platform_probe(dev, sta2x11_scr);
365}
366
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100367/* The three platform drivers */
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200368static struct platform_driver sta2x11_sctl_platform_driver = {
369 .driver = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100370 .name = STA2X11_MFD_SCTL_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200371 .owner = THIS_MODULE,
372 },
373 .probe = sta2x11_sctl_probe,
374};
375
376static int __init sta2x11_sctl_init(void)
377{
378 pr_info("%s\n", __func__);
379 return platform_driver_register(&sta2x11_sctl_platform_driver);
380}
381
382static struct platform_driver sta2x11_platform_driver = {
383 .driver = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100384 .name = STA2X11_MFD_APBREG_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200385 .owner = THIS_MODULE,
386 },
387 .probe = sta2x11_apbreg_probe,
388};
389
390static int __init sta2x11_apbreg_init(void)
391{
392 pr_info("%s\n", __func__);
393 return platform_driver_register(&sta2x11_platform_driver);
394}
395
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100396static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
397 .driver = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100398 .name = STA2X11_MFD_APB_SOC_REGS_NAME,
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100399 .owner = THIS_MODULE,
400 },
401 .probe = sta2x11_apb_soc_regs_probe,
402};
403
404static int __init sta2x11_apb_soc_regs_init(void)
405{
406 pr_info("%s\n", __func__);
407 return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
408}
409
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100410static struct platform_driver sta2x11_scr_platform_driver = {
411 .driver = {
412 .name = STA2X11_MFD_SCR_NAME,
413 .owner = THIS_MODULE,
414 },
415 .probe = sta2x11_scr_probe,
416};
417
418static int __init sta2x11_scr_init(void)
419{
420 pr_info("%s\n", __func__);
421 return platform_driver_register(&sta2x11_scr_platform_driver);
422}
423
424
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200425/*
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100426 * What follows are the PCI devices that host the above pdevs.
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200427 * Each logic block is 4kB and they are all consecutive: we use this info.
428 */
429
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100430/* Mfd 0 device */
431
432/* Mfd 0, Bar 0 */
433enum mfd0_bar0_cells {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200434 STA2X11_GPIO_0 = 0,
435 STA2X11_GPIO_1,
436 STA2X11_GPIO_2,
437 STA2X11_GPIO_3,
438 STA2X11_SCTL,
439 STA2X11_SCR,
440 STA2X11_TIME,
441};
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100442/* Mfd 0 , Bar 1 */
443enum mfd0_bar1_cells {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200444 STA2X11_APBREG = 0,
445};
446#define CELL_4K(_name, _cell) { \
447 .name = _name, \
448 .start = _cell * 4096, .end = _cell * 4096 + 4095, \
449 .flags = IORESOURCE_MEM, \
450 }
451
Bill Pembertona73e5df2012-11-19 13:25:09 -0500452static const struct resource gpio_resources[] = {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200453 {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100454 /* 4 consecutive cells, 1 driver */
455 .name = STA2X11_MFD_GPIO_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200456 .start = 0,
457 .end = (4 * 4096) - 1,
458 .flags = IORESOURCE_MEM,
459 }
460};
Bill Pembertona73e5df2012-11-19 13:25:09 -0500461static const struct resource sctl_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100462 CELL_4K(STA2X11_MFD_SCTL_NAME, STA2X11_SCTL),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200463};
Bill Pembertona73e5df2012-11-19 13:25:09 -0500464static const struct resource scr_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100465 CELL_4K(STA2X11_MFD_SCR_NAME, STA2X11_SCR),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200466};
Bill Pembertona73e5df2012-11-19 13:25:09 -0500467static const struct resource time_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100468 CELL_4K(STA2X11_MFD_TIME_NAME, STA2X11_TIME),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200469};
470
Bill Pembertona73e5df2012-11-19 13:25:09 -0500471static const struct resource apbreg_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100472 CELL_4K(STA2X11_MFD_APBREG_NAME, STA2X11_APBREG),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200473};
474
475#define DEV(_name, _r) \
476 { .name = _name, .num_resources = ARRAY_SIZE(_r), .resources = _r, }
477
Linus Torvalds2dfea382012-12-16 18:55:20 -0800478static struct mfd_cell sta2x11_mfd0_bar0[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100479 /* offset 0: we add pdata later */
480 DEV(STA2X11_MFD_GPIO_NAME, gpio_resources),
481 DEV(STA2X11_MFD_SCTL_NAME, sctl_resources),
482 DEV(STA2X11_MFD_SCR_NAME, scr_resources),
483 DEV(STA2X11_MFD_TIME_NAME, time_resources),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200484};
485
Linus Torvalds2dfea382012-12-16 18:55:20 -0800486static struct mfd_cell sta2x11_mfd0_bar1[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100487 DEV(STA2X11_MFD_APBREG_NAME, apbreg_resources),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200488};
489
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100490/* Mfd 1 devices */
491
492/* Mfd 1, Bar 0 */
493enum mfd1_bar0_cells {
494 STA2X11_VIC = 0,
495};
496
497/* Mfd 1, Bar 1 */
498enum mfd1_bar1_cells {
499 STA2X11_APB_SOC_REGS = 0,
500};
501
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800502static const struct resource vic_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100503 CELL_4K(STA2X11_MFD_VIC_NAME, STA2X11_VIC),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100504};
505
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800506static const struct resource apb_soc_regs_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100507 CELL_4K(STA2X11_MFD_APB_SOC_REGS_NAME, STA2X11_APB_SOC_REGS),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100508};
509
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800510static struct mfd_cell sta2x11_mfd1_bar0[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100511 DEV(STA2X11_MFD_VIC_NAME, vic_resources),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100512};
513
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800514static struct mfd_cell sta2x11_mfd1_bar1[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100515 DEV(STA2X11_MFD_APB_SOC_REGS_NAME, apb_soc_regs_resources),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100516};
517
518
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200519static int sta2x11_mfd_suspend(struct pci_dev *pdev, pm_message_t state)
520{
521 pci_save_state(pdev);
522 pci_disable_device(pdev);
523 pci_set_power_state(pdev, pci_choose_state(pdev, state));
524
525 return 0;
526}
527
528static int sta2x11_mfd_resume(struct pci_dev *pdev)
529{
530 int err;
531
532 pci_set_power_state(pdev, 0);
533 err = pci_enable_device(pdev);
534 if (err)
535 return err;
536 pci_restore_state(pdev);
537
538 return 0;
539}
540
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100541struct sta2x11_mfd_bar_setup_data {
542 struct mfd_cell *cells;
543 int ncells;
544};
545
546struct sta2x11_mfd_setup_data {
547 struct sta2x11_mfd_bar_setup_data bars[2];
548};
549
550#define STA2X11_MFD0 0
551#define STA2X11_MFD1 1
552
553static struct sta2x11_mfd_setup_data mfd_setup_data[] = {
554 /* Mfd 0: gpio, sctl, scr, timers / apbregs */
555 [STA2X11_MFD0] = {
556 .bars = {
557 [0] = {
558 .cells = sta2x11_mfd0_bar0,
559 .ncells = ARRAY_SIZE(sta2x11_mfd0_bar0),
560 },
561 [1] = {
562 .cells = sta2x11_mfd0_bar1,
563 .ncells = ARRAY_SIZE(sta2x11_mfd0_bar1),
564 },
565 },
566 },
567 /* Mfd 1: vic / apb-soc-regs */
568 [STA2X11_MFD1] = {
569 .bars = {
570 [0] = {
571 .cells = sta2x11_mfd1_bar0,
572 .ncells = ARRAY_SIZE(sta2x11_mfd1_bar0),
573 },
574 [1] = {
575 .cells = sta2x11_mfd1_bar1,
576 .ncells = ARRAY_SIZE(sta2x11_mfd1_bar1),
577 },
578 },
579 },
580};
581
Linus Torvalds2dfea382012-12-16 18:55:20 -0800582static void sta2x11_mfd_setup(struct pci_dev *pdev,
583 struct sta2x11_mfd_setup_data *sd)
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100584{
585 int i, j;
586 for (i = 0; i < ARRAY_SIZE(sd->bars); i++)
587 for (j = 0; j < sd->bars[i].ncells; j++) {
588 sd->bars[i].cells[j].pdata_size = sizeof(pdev);
589 sd->bars[i].cells[j].platform_data = &pdev;
590 }
591}
592
Bill Pembertonf791be42012-11-19 13:23:04 -0500593static int sta2x11_mfd_probe(struct pci_dev *pdev,
Linus Torvalds2dfea382012-12-16 18:55:20 -0800594 const struct pci_device_id *pci_id)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200595{
596 int err, i;
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100597 struct sta2x11_mfd_setup_data *setup_data;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200598
599 dev_info(&pdev->dev, "%s\n", __func__);
600
601 err = pci_enable_device(pdev);
602 if (err) {
603 dev_err(&pdev->dev, "Can't enable device.\n");
604 return err;
605 }
606
607 err = pci_enable_msi(pdev);
608 if (err)
609 dev_info(&pdev->dev, "Enable msi failed\n");
610
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100611 setup_data = pci_id->device == PCI_DEVICE_ID_STMICRO_GPIO ?
612 &mfd_setup_data[STA2X11_MFD0] :
613 &mfd_setup_data[STA2X11_MFD1];
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200614
615 /* platform data is the pci device for all of them */
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100616 sta2x11_mfd_setup(pdev, setup_data);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200617
618 /* Record this pdev before mfd_add_devices: their probe looks for it */
Davide Ciminaghi8ec86a32012-11-09 15:19:56 +0100619 if (!sta2x11_mfd_find(pdev))
620 sta2x11_mfd_add(pdev, GFP_ATOMIC);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200621
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100622 /* Just 2 bars for all mfd's at present */
623 for (i = 0; i < 2; i++) {
624 err = mfd_add_devices(&pdev->dev, -1,
625 setup_data->bars[i].cells,
626 setup_data->bars[i].ncells,
627 &pdev->resource[i],
628 0, NULL);
629 if (err) {
630 dev_err(&pdev->dev,
631 "mfd_add_devices[%d] failed: %d\n", i, err);
632 goto err_disable;
633 }
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200634 }
635
636 return 0;
637
638err_disable:
639 mfd_remove_devices(&pdev->dev);
640 pci_disable_device(pdev);
641 pci_disable_msi(pdev);
642 return err;
643}
644
645static DEFINE_PCI_DEVICE_TABLE(sta2x11_mfd_tbl) = {
646 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_GPIO)},
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100647 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIC)},
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200648 {0,},
649};
650
651static struct pci_driver sta2x11_mfd_driver = {
652 .name = "sta2x11-mfd",
653 .id_table = sta2x11_mfd_tbl,
654 .probe = sta2x11_mfd_probe,
655 .suspend = sta2x11_mfd_suspend,
656 .resume = sta2x11_mfd_resume,
657};
658
659static int __init sta2x11_mfd_init(void)
660{
661 pr_info("%s\n", __func__);
662 return pci_register_driver(&sta2x11_mfd_driver);
663}
664
665/*
666 * All of this must be ready before "normal" devices like MMCI appear.
667 * But MFD (the pci device) can't be too early. The following choice
668 * prepares platform drivers very early and probe the PCI device later,
669 * but before other PCI devices.
670 */
671subsys_initcall(sta2x11_apbreg_init);
672subsys_initcall(sta2x11_sctl_init);
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100673subsys_initcall(sta2x11_apb_soc_regs_init);
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100674subsys_initcall(sta2x11_scr_init);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200675rootfs_initcall(sta2x11_mfd_init);
676
677MODULE_LICENSE("GPL v2");
678MODULE_AUTHOR("Wind River");
679MODULE_DESCRIPTION("STA2x11 mfd for GPIO, SCTL and APBREG");
680MODULE_DEVICE_TABLE(pci, sta2x11_mfd_tbl);