blob: 9bd33169a1118b835c4e4bd53f7f069d5ae764e5 [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
Bill Pemberton4740f732012-11-19 13:26:01 -0500101static int mfd_remove(struct pci_dev *pdev)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200102{
103 struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
104
105 if (!mfd)
106 return -ENODEV;
107 list_del(&mfd->list);
108 kfree(mfd);
109 return 0;
110}
111
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100112/* This function is exported and is not expected to fail */
113u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
114 enum sta2x11_mfd_plat_dev index)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200115{
116 struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
117 u32 r;
118 unsigned long flags;
Wei Yongjun709edec2012-12-02 08:36:22 -0500119 void __iomem *regs;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200120
121 if (!mfd) {
122 dev_warn(&pdev->dev, ": can't access sctl regs\n");
123 return 0;
124 }
Wei Yongjun709edec2012-12-02 08:36:22 -0500125
126 regs = mfd->regs[index];
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100127 if (!regs) {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200128 dev_warn(&pdev->dev, ": system ctl not initialized\n");
129 return 0;
130 }
Davide Ciminaghie885ba292012-11-09 15:19:58 +0100131 spin_lock_irqsave(&mfd->lock[index], flags);
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100132 r = readl(regs + reg);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200133 r &= ~mask;
134 r |= val;
135 if (mask)
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100136 writel(r, regs + reg);
Davide Ciminaghie885ba292012-11-09 15:19:58 +0100137 spin_unlock_irqrestore(&mfd->lock[index], flags);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200138 return r;
139}
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100140EXPORT_SYMBOL(__sta2x11_mfd_mask);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200141
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100142int sta2x11_mfd_get_regs_data(struct platform_device *dev,
143 enum sta2x11_mfd_plat_dev index,
144 void __iomem **regs,
145 spinlock_t **lock)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200146{
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100147 struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data);
148 struct sta2x11_mfd *mfd;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200149
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100150 if (!pdev)
151 return -ENODEV;
152 mfd = sta2x11_mfd_find(pdev);
153 if (!mfd)
154 return -ENODEV;
155 if (index >= sta2x11_n_mfd_plat_devs)
156 return -ENODEV;
157 *regs = mfd->regs[index];
158 *lock = &mfd->lock[index];
159 pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs);
160 return *regs ? 0 : -ENODEV;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200161}
Davide Ciminaghi29f5b5a2012-11-09 15:19:54 +0100162EXPORT_SYMBOL(sta2x11_mfd_get_regs_data);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200163
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100164/*
165 * Special sta2x11-mfd regmap lock/unlock functions
166 */
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200167
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100168static void sta2x11_regmap_lock(void *__lock)
169{
170 spinlock_t *lock = __lock;
171 spin_lock(lock);
172}
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200173
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100174static void sta2x11_regmap_unlock(void *__lock)
175{
176 spinlock_t *lock = __lock;
177 spin_unlock(lock);
178}
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100179
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100180/* OTP (one time programmable registers do not require locking */
181static void sta2x11_regmap_nolock(void *__lock)
182{
183}
184
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100185static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100186 [sta2x11_sctl] = STA2X11_MFD_SCTL_NAME,
187 [sta2x11_apbreg] = STA2X11_MFD_APBREG_NAME,
188 [sta2x11_apb_soc_regs] = STA2X11_MFD_APB_SOC_REGS_NAME,
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100189 [sta2x11_scr] = STA2X11_MFD_SCR_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200190};
191
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100192static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg)
193{
194 return !__reg_within_range(reg, SCTL_SCPCIECSBRST, SCTL_SCRSTSTA);
195}
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200196
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100197static struct regmap_config sta2x11_sctl_regmap_config = {
198 .reg_bits = 32,
199 .reg_stride = 4,
200 .val_bits = 32,
201 .lock = sta2x11_regmap_lock,
202 .unlock = sta2x11_regmap_unlock,
203 .max_register = SCTL_SCRSTSTA,
204 .writeable_reg = sta2x11_sctl_writeable_reg,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200205};
206
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100207static bool sta2x11_scr_readable_reg(struct device *dev, unsigned int reg)
208{
209 return (reg == STA2X11_SECR_CR) ||
210 __reg_within_range(reg, STA2X11_SECR_FVR0, STA2X11_SECR_FVR1);
211}
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200212
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100213static bool sta2x11_scr_writeable_reg(struct device *dev, unsigned int reg)
214{
215 return false;
216}
217
218static struct regmap_config sta2x11_scr_regmap_config = {
219 .reg_bits = 32,
220 .reg_stride = 4,
221 .val_bits = 32,
222 .lock = sta2x11_regmap_nolock,
223 .unlock = sta2x11_regmap_nolock,
224 .max_register = STA2X11_SECR_FVR1,
225 .readable_reg = sta2x11_scr_readable_reg,
226 .writeable_reg = sta2x11_scr_writeable_reg,
227};
228
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100229static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg)
230{
231 /* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */
232 if (reg >= APBREG_BSR_SARAC)
233 reg -= APBREG_BSR_SARAC;
234 switch (reg) {
235 case APBREG_BSR:
236 case APBREG_PAER:
237 case APBREG_PWAC:
238 case APBREG_PRAC:
239 case APBREG_PCG:
240 case APBREG_PUR:
241 case APBREG_EMU_PCG:
242 return true;
243 default:
244 return false;
245 }
246}
247
248static bool sta2x11_apbreg_writeable_reg(struct device *dev, unsigned int reg)
249{
250 if (reg >= APBREG_BSR_SARAC)
251 reg -= APBREG_BSR_SARAC;
252 if (!sta2x11_apbreg_readable_reg(dev, reg))
253 return false;
254 return reg != APBREG_PAER;
255}
256
257static struct regmap_config sta2x11_apbreg_regmap_config = {
258 .reg_bits = 32,
259 .reg_stride = 4,
260 .val_bits = 32,
261 .lock = sta2x11_regmap_lock,
262 .unlock = sta2x11_regmap_unlock,
263 .max_register = APBREG_EMU_PCG_SARAC,
264 .readable_reg = sta2x11_apbreg_readable_reg,
265 .writeable_reg = sta2x11_apbreg_writeable_reg,
266};
267
268static bool sta2x11_apb_soc_regs_readable_reg(struct device *dev,
269 unsigned int reg)
270{
271 return reg <= PCIE_SoC_INT_ROUTER_STATUS3_REG ||
272 __reg_within_range(reg, DMA_IP_CTRL_REG, SPARE3_RESERVED) ||
273 __reg_within_range(reg, MASTER_LOCK_REG,
274 SYSTEM_CONFIG_STATUS_REG) ||
275 reg == MSP_CLK_CTRL_REG ||
276 __reg_within_range(reg, COMPENSATION_REG1, TEST_CTL_REG);
277}
278
279static bool sta2x11_apb_soc_regs_writeable_reg(struct device *dev,
280 unsigned int reg)
281{
282 if (!sta2x11_apb_soc_regs_readable_reg(dev, reg))
283 return false;
284 switch (reg) {
285 case PCIE_COMMON_CLOCK_CONFIG_0_4_0:
286 case SYSTEM_CONFIG_STATUS_REG:
287 case COMPENSATION_REG1:
288 case PCIE_SoC_INT_ROUTER_STATUS0_REG...PCIE_SoC_INT_ROUTER_STATUS3_REG:
289 case PCIE_PM_STATUS_0_PORT_0_4...PCIE_PM_STATUS_7_0_EP4:
290 return false;
291 default:
292 return true;
293 }
294}
295
296static struct regmap_config sta2x11_apb_soc_regs_regmap_config = {
297 .reg_bits = 32,
298 .reg_stride = 4,
299 .val_bits = 32,
300 .lock = sta2x11_regmap_lock,
301 .unlock = sta2x11_regmap_unlock,
302 .max_register = TEST_CTL_REG,
303 .readable_reg = sta2x11_apb_soc_regs_readable_reg,
304 .writeable_reg = sta2x11_apb_soc_regs_writeable_reg,
305};
306
307static struct regmap_config *
308sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = {
309 [sta2x11_sctl] = &sta2x11_sctl_regmap_config,
310 [sta2x11_apbreg] = &sta2x11_apbreg_regmap_config,
311 [sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config,
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100312 [sta2x11_scr] = &sta2x11_scr_regmap_config,
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100313};
314
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100315/* Probe for the four platform devices */
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100316
317static int sta2x11_mfd_platform_probe(struct platform_device *dev,
318 enum sta2x11_mfd_plat_dev index)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200319{
320 struct pci_dev **pdev;
321 struct sta2x11_mfd *mfd;
322 struct resource *res;
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100323 const char *name = sta2x11_mfd_names[index];
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100324 struct regmap_config *regmap_config = sta2x11_mfd_regmap_configs[index];
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200325
326 pdev = dev->dev.platform_data;
327 mfd = sta2x11_mfd_find(*pdev);
328 if (!mfd)
329 return -ENODEV;
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100330 if (!regmap_config)
331 return -ENODEV;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200332
333 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
334 if (!res)
335 return -ENOMEM;
336
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100337 if (!request_mem_region(res->start, resource_size(res), name))
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200338 return -EBUSY;
339
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100340 mfd->regs[index] = ioremap(res->start, resource_size(res));
341 if (!mfd->regs[index]) {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200342 release_mem_region(res->start, resource_size(res));
343 return -ENOMEM;
344 }
Davide Ciminaghid94e2552012-11-09 15:19:53 +0100345 regmap_config->lock_arg = &mfd->lock;
346 /*
347 No caching, registers could be reached both via regmap and via
348 void __iomem *
349 */
350 regmap_config->cache_type = REGCACHE_NONE;
351 mfd->regmap[index] = devm_regmap_init_mmio(&dev->dev, mfd->regs[index],
352 regmap_config);
353 WARN_ON(!mfd->regmap[index]);
354
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200355 return 0;
356}
357
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100358static int sta2x11_sctl_probe(struct platform_device *dev)
359{
360 return sta2x11_mfd_platform_probe(dev, sta2x11_sctl);
361}
362
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200363static int sta2x11_apbreg_probe(struct platform_device *dev)
364{
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100365 return sta2x11_mfd_platform_probe(dev, sta2x11_apbreg);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200366}
367
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100368static int sta2x11_apb_soc_regs_probe(struct platform_device *dev)
369{
370 return sta2x11_mfd_platform_probe(dev, sta2x11_apb_soc_regs);
371}
372
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100373static int sta2x11_scr_probe(struct platform_device *dev)
374{
375 return sta2x11_mfd_platform_probe(dev, sta2x11_scr);
376}
377
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100378/* The three platform drivers */
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200379static struct platform_driver sta2x11_sctl_platform_driver = {
380 .driver = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100381 .name = STA2X11_MFD_SCTL_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200382 .owner = THIS_MODULE,
383 },
384 .probe = sta2x11_sctl_probe,
385};
386
387static int __init sta2x11_sctl_init(void)
388{
389 pr_info("%s\n", __func__);
390 return platform_driver_register(&sta2x11_sctl_platform_driver);
391}
392
393static struct platform_driver sta2x11_platform_driver = {
394 .driver = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100395 .name = STA2X11_MFD_APBREG_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200396 .owner = THIS_MODULE,
397 },
398 .probe = sta2x11_apbreg_probe,
399};
400
401static int __init sta2x11_apbreg_init(void)
402{
403 pr_info("%s\n", __func__);
404 return platform_driver_register(&sta2x11_platform_driver);
405}
406
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100407static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
408 .driver = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100409 .name = STA2X11_MFD_APB_SOC_REGS_NAME,
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100410 .owner = THIS_MODULE,
411 },
412 .probe = sta2x11_apb_soc_regs_probe,
413};
414
415static int __init sta2x11_apb_soc_regs_init(void)
416{
417 pr_info("%s\n", __func__);
418 return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
419}
420
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100421static struct platform_driver sta2x11_scr_platform_driver = {
422 .driver = {
423 .name = STA2X11_MFD_SCR_NAME,
424 .owner = THIS_MODULE,
425 },
426 .probe = sta2x11_scr_probe,
427};
428
429static int __init sta2x11_scr_init(void)
430{
431 pr_info("%s\n", __func__);
432 return platform_driver_register(&sta2x11_scr_platform_driver);
433}
434
435
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200436/*
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100437 * What follows are the PCI devices that host the above pdevs.
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200438 * Each logic block is 4kB and they are all consecutive: we use this info.
439 */
440
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100441/* Mfd 0 device */
442
443/* Mfd 0, Bar 0 */
444enum mfd0_bar0_cells {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200445 STA2X11_GPIO_0 = 0,
446 STA2X11_GPIO_1,
447 STA2X11_GPIO_2,
448 STA2X11_GPIO_3,
449 STA2X11_SCTL,
450 STA2X11_SCR,
451 STA2X11_TIME,
452};
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100453/* Mfd 0 , Bar 1 */
454enum mfd0_bar1_cells {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200455 STA2X11_APBREG = 0,
456};
457#define CELL_4K(_name, _cell) { \
458 .name = _name, \
459 .start = _cell * 4096, .end = _cell * 4096 + 4095, \
460 .flags = IORESOURCE_MEM, \
461 }
462
Bill Pembertona73e5df2012-11-19 13:25:09 -0500463static const struct resource gpio_resources[] = {
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200464 {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100465 /* 4 consecutive cells, 1 driver */
466 .name = STA2X11_MFD_GPIO_NAME,
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200467 .start = 0,
468 .end = (4 * 4096) - 1,
469 .flags = IORESOURCE_MEM,
470 }
471};
Bill Pembertona73e5df2012-11-19 13:25:09 -0500472static const struct resource sctl_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100473 CELL_4K(STA2X11_MFD_SCTL_NAME, STA2X11_SCTL),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200474};
Bill Pembertona73e5df2012-11-19 13:25:09 -0500475static const struct resource scr_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100476 CELL_4K(STA2X11_MFD_SCR_NAME, STA2X11_SCR),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200477};
Bill Pembertona73e5df2012-11-19 13:25:09 -0500478static const struct resource time_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100479 CELL_4K(STA2X11_MFD_TIME_NAME, STA2X11_TIME),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200480};
481
Bill Pembertona73e5df2012-11-19 13:25:09 -0500482static const struct resource apbreg_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100483 CELL_4K(STA2X11_MFD_APBREG_NAME, STA2X11_APBREG),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200484};
485
486#define DEV(_name, _r) \
487 { .name = _name, .num_resources = ARRAY_SIZE(_r), .resources = _r, }
488
Linus Torvalds2dfea382012-12-16 18:55:20 -0800489static struct mfd_cell sta2x11_mfd0_bar0[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100490 /* offset 0: we add pdata later */
491 DEV(STA2X11_MFD_GPIO_NAME, gpio_resources),
492 DEV(STA2X11_MFD_SCTL_NAME, sctl_resources),
493 DEV(STA2X11_MFD_SCR_NAME, scr_resources),
494 DEV(STA2X11_MFD_TIME_NAME, time_resources),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200495};
496
Linus Torvalds2dfea382012-12-16 18:55:20 -0800497static struct mfd_cell sta2x11_mfd0_bar1[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100498 DEV(STA2X11_MFD_APBREG_NAME, apbreg_resources),
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200499};
500
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100501/* Mfd 1 devices */
502
503/* Mfd 1, Bar 0 */
504enum mfd1_bar0_cells {
505 STA2X11_VIC = 0,
506};
507
508/* Mfd 1, Bar 1 */
509enum mfd1_bar1_cells {
510 STA2X11_APB_SOC_REGS = 0,
511};
512
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800513static const struct resource vic_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100514 CELL_4K(STA2X11_MFD_VIC_NAME, STA2X11_VIC),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100515};
516
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800517static const struct resource apb_soc_regs_resources[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100518 CELL_4K(STA2X11_MFD_APB_SOC_REGS_NAME, STA2X11_APB_SOC_REGS),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100519};
520
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800521static struct mfd_cell sta2x11_mfd1_bar0[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100522 DEV(STA2X11_MFD_VIC_NAME, vic_resources),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100523};
524
Greg Kroah-Hartman612b95c2012-12-21 15:03:15 -0800525static struct mfd_cell sta2x11_mfd1_bar1[] = {
Davide Ciminaghib18adaf2012-11-09 15:19:55 +0100526 DEV(STA2X11_MFD_APB_SOC_REGS_NAME, apb_soc_regs_resources),
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100527};
528
529
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200530static int sta2x11_mfd_suspend(struct pci_dev *pdev, pm_message_t state)
531{
532 pci_save_state(pdev);
533 pci_disable_device(pdev);
534 pci_set_power_state(pdev, pci_choose_state(pdev, state));
535
536 return 0;
537}
538
539static int sta2x11_mfd_resume(struct pci_dev *pdev)
540{
541 int err;
542
543 pci_set_power_state(pdev, 0);
544 err = pci_enable_device(pdev);
545 if (err)
546 return err;
547 pci_restore_state(pdev);
548
549 return 0;
550}
551
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100552struct sta2x11_mfd_bar_setup_data {
553 struct mfd_cell *cells;
554 int ncells;
555};
556
557struct sta2x11_mfd_setup_data {
558 struct sta2x11_mfd_bar_setup_data bars[2];
559};
560
561#define STA2X11_MFD0 0
562#define STA2X11_MFD1 1
563
564static struct sta2x11_mfd_setup_data mfd_setup_data[] = {
565 /* Mfd 0: gpio, sctl, scr, timers / apbregs */
566 [STA2X11_MFD0] = {
567 .bars = {
568 [0] = {
569 .cells = sta2x11_mfd0_bar0,
570 .ncells = ARRAY_SIZE(sta2x11_mfd0_bar0),
571 },
572 [1] = {
573 .cells = sta2x11_mfd0_bar1,
574 .ncells = ARRAY_SIZE(sta2x11_mfd0_bar1),
575 },
576 },
577 },
578 /* Mfd 1: vic / apb-soc-regs */
579 [STA2X11_MFD1] = {
580 .bars = {
581 [0] = {
582 .cells = sta2x11_mfd1_bar0,
583 .ncells = ARRAY_SIZE(sta2x11_mfd1_bar0),
584 },
585 [1] = {
586 .cells = sta2x11_mfd1_bar1,
587 .ncells = ARRAY_SIZE(sta2x11_mfd1_bar1),
588 },
589 },
590 },
591};
592
Linus Torvalds2dfea382012-12-16 18:55:20 -0800593static void sta2x11_mfd_setup(struct pci_dev *pdev,
594 struct sta2x11_mfd_setup_data *sd)
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100595{
596 int i, j;
597 for (i = 0; i < ARRAY_SIZE(sd->bars); i++)
598 for (j = 0; j < sd->bars[i].ncells; j++) {
599 sd->bars[i].cells[j].pdata_size = sizeof(pdev);
600 sd->bars[i].cells[j].platform_data = &pdev;
601 }
602}
603
Bill Pembertonf791be42012-11-19 13:23:04 -0500604static int sta2x11_mfd_probe(struct pci_dev *pdev,
Linus Torvalds2dfea382012-12-16 18:55:20 -0800605 const struct pci_device_id *pci_id)
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200606{
607 int err, i;
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100608 struct sta2x11_mfd_setup_data *setup_data;
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200609
610 dev_info(&pdev->dev, "%s\n", __func__);
611
612 err = pci_enable_device(pdev);
613 if (err) {
614 dev_err(&pdev->dev, "Can't enable device.\n");
615 return err;
616 }
617
618 err = pci_enable_msi(pdev);
619 if (err)
620 dev_info(&pdev->dev, "Enable msi failed\n");
621
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100622 setup_data = pci_id->device == PCI_DEVICE_ID_STMICRO_GPIO ?
623 &mfd_setup_data[STA2X11_MFD0] :
624 &mfd_setup_data[STA2X11_MFD1];
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200625
626 /* platform data is the pci device for all of them */
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100627 sta2x11_mfd_setup(pdev, setup_data);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200628
629 /* Record this pdev before mfd_add_devices: their probe looks for it */
Davide Ciminaghi8ec86a32012-11-09 15:19:56 +0100630 if (!sta2x11_mfd_find(pdev))
631 sta2x11_mfd_add(pdev, GFP_ATOMIC);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200632
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100633 /* Just 2 bars for all mfd's at present */
634 for (i = 0; i < 2; i++) {
635 err = mfd_add_devices(&pdev->dev, -1,
636 setup_data->bars[i].cells,
637 setup_data->bars[i].ncells,
638 &pdev->resource[i],
639 0, NULL);
640 if (err) {
641 dev_err(&pdev->dev,
642 "mfd_add_devices[%d] failed: %d\n", i, err);
643 goto err_disable;
644 }
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200645 }
646
647 return 0;
648
649err_disable:
650 mfd_remove_devices(&pdev->dev);
651 pci_disable_device(pdev);
652 pci_disable_msi(pdev);
653 return err;
654}
655
656static DEFINE_PCI_DEVICE_TABLE(sta2x11_mfd_tbl) = {
657 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_GPIO)},
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100658 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIC)},
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200659 {0,},
660};
661
662static struct pci_driver sta2x11_mfd_driver = {
663 .name = "sta2x11-mfd",
664 .id_table = sta2x11_mfd_tbl,
665 .probe = sta2x11_mfd_probe,
666 .suspend = sta2x11_mfd_suspend,
667 .resume = sta2x11_mfd_resume,
668};
669
670static int __init sta2x11_mfd_init(void)
671{
672 pr_info("%s\n", __func__);
673 return pci_register_driver(&sta2x11_mfd_driver);
674}
675
676/*
677 * All of this must be ready before "normal" devices like MMCI appear.
678 * But MFD (the pci device) can't be too early. The following choice
679 * prepares platform drivers very early and probe the PCI device later,
680 * but before other PCI devices.
681 */
682subsys_initcall(sta2x11_apbreg_init);
683subsys_initcall(sta2x11_sctl_init);
Davide Ciminaghi1950c712012-11-09 15:19:52 +0100684subsys_initcall(sta2x11_apb_soc_regs_init);
Davide Ciminaghidba6c1a2012-11-09 15:19:59 +0100685subsys_initcall(sta2x11_scr_init);
Alessandro Rubini35bdd292012-04-12 10:48:44 +0200686rootfs_initcall(sta2x11_mfd_init);
687
688MODULE_LICENSE("GPL v2");
689MODULE_AUTHOR("Wind River");
690MODULE_DESCRIPTION("STA2x11 mfd for GPIO, SCTL and APBREG");
691MODULE_DEVICE_TABLE(pci, sta2x11_mfd_tbl);