Merge branch 'core/percpu' into stackprotector
[linux-2.6] / arch / powerpc / sysdev / fsl_soc.c
1 /*
2  * FSL SoC setup code
3  *
4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
5  *
6  * 2006 (c) MontaVista Software, Inc.
7  * Vitaly Bordug <vbordug@ru.mvista.com>
8  *
9  * This program is free software; you can redistribute  it and/or modify it
10  * under  the terms of  the GNU General  Public License as published by the
11  * Free Software Foundation;  either version 2 of the  License, or (at your
12  * option) any later version.
13  */
14
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/major.h>
20 #include <linux/delay.h>
21 #include <linux/irq.h>
22 #include <linux/module.h>
23 #include <linux/device.h>
24 #include <linux/platform_device.h>
25 #include <linux/of_platform.h>
26 #include <linux/phy.h>
27 #include <linux/phy_fixed.h>
28 #include <linux/spi/spi.h>
29 #include <linux/fsl_devices.h>
30 #include <linux/fs_enet_pd.h>
31 #include <linux/fs_uart_pd.h>
32
33 #include <asm/system.h>
34 #include <asm/atomic.h>
35 #include <asm/io.h>
36 #include <asm/irq.h>
37 #include <asm/time.h>
38 #include <asm/prom.h>
39 #include <sysdev/fsl_soc.h>
40 #include <mm/mmu_decl.h>
41 #include <asm/cpm2.h>
42
43 extern void init_fcc_ioports(struct fs_platform_info*);
44 extern void init_fec_ioports(struct fs_platform_info*);
45 extern void init_smc_ioports(struct fs_uart_platform_info*);
46 static phys_addr_t immrbase = -1;
47
48 phys_addr_t get_immrbase(void)
49 {
50         struct device_node *soc;
51
52         if (immrbase != -1)
53                 return immrbase;
54
55         soc = of_find_node_by_type(NULL, "soc");
56         if (soc) {
57                 int size;
58                 u32 naddr;
59                 const u32 *prop = of_get_property(soc, "#address-cells", &size);
60
61                 if (prop && size == 4)
62                         naddr = *prop;
63                 else
64                         naddr = 2;
65
66                 prop = of_get_property(soc, "ranges", &size);
67                 if (prop)
68                         immrbase = of_translate_address(soc, prop + naddr);
69
70                 of_node_put(soc);
71         }
72
73         return immrbase;
74 }
75
76 EXPORT_SYMBOL(get_immrbase);
77
78 static u32 sysfreq = -1;
79
80 u32 fsl_get_sys_freq(void)
81 {
82         struct device_node *soc;
83         const u32 *prop;
84         int size;
85
86         if (sysfreq != -1)
87                 return sysfreq;
88
89         soc = of_find_node_by_type(NULL, "soc");
90         if (!soc)
91                 return -1;
92
93         prop = of_get_property(soc, "clock-frequency", &size);
94         if (!prop || size != sizeof(*prop) || *prop == 0)
95                 prop = of_get_property(soc, "bus-frequency", &size);
96
97         if (prop && size == sizeof(*prop))
98                 sysfreq = *prop;
99
100         of_node_put(soc);
101         return sysfreq;
102 }
103 EXPORT_SYMBOL(fsl_get_sys_freq);
104
105 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
106
107 static u32 brgfreq = -1;
108
109 u32 get_brgfreq(void)
110 {
111         struct device_node *node;
112         const unsigned int *prop;
113         int size;
114
115         if (brgfreq != -1)
116                 return brgfreq;
117
118         node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
119         if (node) {
120                 prop = of_get_property(node, "clock-frequency", &size);
121                 if (prop && size == 4)
122                         brgfreq = *prop;
123
124                 of_node_put(node);
125                 return brgfreq;
126         }
127
128         /* Legacy device binding -- will go away when no users are left. */
129         node = of_find_node_by_type(NULL, "cpm");
130         if (!node)
131                 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
132         if (!node)
133                 node = of_find_node_by_type(NULL, "qe");
134
135         if (node) {
136                 prop = of_get_property(node, "brg-frequency", &size);
137                 if (prop && size == 4)
138                         brgfreq = *prop;
139
140                 if (brgfreq == -1 || brgfreq == 0) {
141                         prop = of_get_property(node, "bus-frequency", &size);
142                         if (prop && size == 4)
143                                 brgfreq = *prop / 2;
144                 }
145                 of_node_put(node);
146         }
147
148         return brgfreq;
149 }
150
151 EXPORT_SYMBOL(get_brgfreq);
152
153 static u32 fs_baudrate = -1;
154
155 u32 get_baudrate(void)
156 {
157         struct device_node *node;
158
159         if (fs_baudrate != -1)
160                 return fs_baudrate;
161
162         node = of_find_node_by_type(NULL, "serial");
163         if (node) {
164                 int size;
165                 const unsigned int *prop = of_get_property(node,
166                                 "current-speed", &size);
167
168                 if (prop)
169                         fs_baudrate = *prop;
170                 of_node_put(node);
171         }
172
173         return fs_baudrate;
174 }
175
176 EXPORT_SYMBOL(get_baudrate);
177 #endif /* CONFIG_CPM2 */
178
179 #ifdef CONFIG_FIXED_PHY
180 static int __init of_add_fixed_phys(void)
181 {
182         int ret;
183         struct device_node *np;
184         u32 *fixed_link;
185         struct fixed_phy_status status = {};
186
187         for_each_node_by_name(np, "ethernet") {
188                 fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
189                 if (!fixed_link)
190                         continue;
191
192                 status.link = 1;
193                 status.duplex = fixed_link[1];
194                 status.speed = fixed_link[2];
195                 status.pause = fixed_link[3];
196                 status.asym_pause = fixed_link[4];
197
198                 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
199                 if (ret) {
200                         of_node_put(np);
201                         return ret;
202                 }
203         }
204
205         return 0;
206 }
207 arch_initcall(of_add_fixed_phys);
208 #endif /* CONFIG_FIXED_PHY */
209
210 #ifdef CONFIG_PPC_83xx
211 static int __init mpc83xx_wdt_init(void)
212 {
213         struct resource r;
214         struct device_node *np;
215         struct platform_device *dev;
216         u32 freq = fsl_get_sys_freq();
217         int ret;
218
219         np = of_find_compatible_node(NULL, "watchdog", "mpc83xx_wdt");
220
221         if (!np) {
222                 ret = -ENODEV;
223                 goto nodev;
224         }
225
226         memset(&r, 0, sizeof(r));
227
228         ret = of_address_to_resource(np, 0, &r);
229         if (ret)
230                 goto err;
231
232         dev = platform_device_register_simple("mpc83xx_wdt", 0, &r, 1);
233         if (IS_ERR(dev)) {
234                 ret = PTR_ERR(dev);
235                 goto err;
236         }
237
238         ret = platform_device_add_data(dev, &freq, sizeof(freq));
239         if (ret)
240                 goto unreg;
241
242         of_node_put(np);
243         return 0;
244
245 unreg:
246         platform_device_unregister(dev);
247 err:
248         of_node_put(np);
249 nodev:
250         return ret;
251 }
252
253 arch_initcall(mpc83xx_wdt_init);
254 #endif
255
256 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
257 {
258         if (!phy_type)
259                 return FSL_USB2_PHY_NONE;
260         if (!strcasecmp(phy_type, "ulpi"))
261                 return FSL_USB2_PHY_ULPI;
262         if (!strcasecmp(phy_type, "utmi"))
263                 return FSL_USB2_PHY_UTMI;
264         if (!strcasecmp(phy_type, "utmi_wide"))
265                 return FSL_USB2_PHY_UTMI_WIDE;
266         if (!strcasecmp(phy_type, "serial"))
267                 return FSL_USB2_PHY_SERIAL;
268
269         return FSL_USB2_PHY_NONE;
270 }
271
272 static int __init fsl_usb_of_init(void)
273 {
274         struct device_node *np;
275         unsigned int i = 0;
276         struct platform_device *usb_dev_mph = NULL, *usb_dev_dr_host = NULL,
277                 *usb_dev_dr_client = NULL;
278         int ret;
279
280         for_each_compatible_node(np, NULL, "fsl-usb2-mph") {
281                 struct resource r[2];
282                 struct fsl_usb2_platform_data usb_data;
283                 const unsigned char *prop = NULL;
284
285                 memset(&r, 0, sizeof(r));
286                 memset(&usb_data, 0, sizeof(usb_data));
287
288                 ret = of_address_to_resource(np, 0, &r[0]);
289                 if (ret)
290                         goto err;
291
292                 of_irq_to_resource(np, 0, &r[1]);
293
294                 usb_dev_mph =
295                     platform_device_register_simple("fsl-ehci", i, r, 2);
296                 if (IS_ERR(usb_dev_mph)) {
297                         ret = PTR_ERR(usb_dev_mph);
298                         goto err;
299                 }
300
301                 usb_dev_mph->dev.coherent_dma_mask = 0xffffffffUL;
302                 usb_dev_mph->dev.dma_mask = &usb_dev_mph->dev.coherent_dma_mask;
303
304                 usb_data.operating_mode = FSL_USB2_MPH_HOST;
305
306                 prop = of_get_property(np, "port0", NULL);
307                 if (prop)
308                         usb_data.port_enables |= FSL_USB2_PORT0_ENABLED;
309
310                 prop = of_get_property(np, "port1", NULL);
311                 if (prop)
312                         usb_data.port_enables |= FSL_USB2_PORT1_ENABLED;
313
314                 prop = of_get_property(np, "phy_type", NULL);
315                 usb_data.phy_mode = determine_usb_phy(prop);
316
317                 ret =
318                     platform_device_add_data(usb_dev_mph, &usb_data,
319                                              sizeof(struct
320                                                     fsl_usb2_platform_data));
321                 if (ret)
322                         goto unreg_mph;
323                 i++;
324         }
325
326         for_each_compatible_node(np, NULL, "fsl-usb2-dr") {
327                 struct resource r[2];
328                 struct fsl_usb2_platform_data usb_data;
329                 const unsigned char *prop = NULL;
330
331                 memset(&r, 0, sizeof(r));
332                 memset(&usb_data, 0, sizeof(usb_data));
333
334                 ret = of_address_to_resource(np, 0, &r[0]);
335                 if (ret)
336                         goto unreg_mph;
337
338                 of_irq_to_resource(np, 0, &r[1]);
339
340                 prop = of_get_property(np, "dr_mode", NULL);
341
342                 if (!prop || !strcmp(prop, "host")) {
343                         usb_data.operating_mode = FSL_USB2_DR_HOST;
344                         usb_dev_dr_host = platform_device_register_simple(
345                                         "fsl-ehci", i, r, 2);
346                         if (IS_ERR(usb_dev_dr_host)) {
347                                 ret = PTR_ERR(usb_dev_dr_host);
348                                 goto err;
349                         }
350                 } else if (prop && !strcmp(prop, "peripheral")) {
351                         usb_data.operating_mode = FSL_USB2_DR_DEVICE;
352                         usb_dev_dr_client = platform_device_register_simple(
353                                         "fsl-usb2-udc", i, r, 2);
354                         if (IS_ERR(usb_dev_dr_client)) {
355                                 ret = PTR_ERR(usb_dev_dr_client);
356                                 goto err;
357                         }
358                 } else if (prop && !strcmp(prop, "otg")) {
359                         usb_data.operating_mode = FSL_USB2_DR_OTG;
360                         usb_dev_dr_host = platform_device_register_simple(
361                                         "fsl-ehci", i, r, 2);
362                         if (IS_ERR(usb_dev_dr_host)) {
363                                 ret = PTR_ERR(usb_dev_dr_host);
364                                 goto err;
365                         }
366                         usb_dev_dr_client = platform_device_register_simple(
367                                         "fsl-usb2-udc", i, r, 2);
368                         if (IS_ERR(usb_dev_dr_client)) {
369                                 ret = PTR_ERR(usb_dev_dr_client);
370                                 goto err;
371                         }
372                 } else {
373                         ret = -EINVAL;
374                         goto err;
375                 }
376
377                 prop = of_get_property(np, "phy_type", NULL);
378                 usb_data.phy_mode = determine_usb_phy(prop);
379
380                 if (usb_dev_dr_host) {
381                         usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
382                         usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
383                                 dev.coherent_dma_mask;
384                         if ((ret = platform_device_add_data(usb_dev_dr_host,
385                                                 &usb_data, sizeof(struct
386                                                 fsl_usb2_platform_data))))
387                                 goto unreg_dr;
388                 }
389                 if (usb_dev_dr_client) {
390                         usb_dev_dr_client->dev.coherent_dma_mask = 0xffffffffUL;
391                         usb_dev_dr_client->dev.dma_mask = &usb_dev_dr_client->
392                                 dev.coherent_dma_mask;
393                         if ((ret = platform_device_add_data(usb_dev_dr_client,
394                                                 &usb_data, sizeof(struct
395                                                 fsl_usb2_platform_data))))
396                                 goto unreg_dr;
397                 }
398                 i++;
399         }
400         return 0;
401
402 unreg_dr:
403         if (usb_dev_dr_host)
404                 platform_device_unregister(usb_dev_dr_host);
405         if (usb_dev_dr_client)
406                 platform_device_unregister(usb_dev_dr_client);
407 unreg_mph:
408         if (usb_dev_mph)
409                 platform_device_unregister(usb_dev_mph);
410 err:
411         return ret;
412 }
413
414 arch_initcall(fsl_usb_of_init);
415
416 static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
417                                    struct spi_board_info *board_infos,
418                                    unsigned int num_board_infos,
419                                    void (*activate_cs)(u8 cs, u8 polarity),
420                                    void (*deactivate_cs)(u8 cs, u8 polarity))
421 {
422         struct device_node *np;
423         unsigned int i = 0;
424
425         for_each_compatible_node(np, type, compatible) {
426                 int ret;
427                 unsigned int j;
428                 const void *prop;
429                 struct resource res[2];
430                 struct platform_device *pdev;
431                 struct fsl_spi_platform_data pdata = {
432                         .activate_cs = activate_cs,
433                         .deactivate_cs = deactivate_cs,
434                 };
435
436                 memset(res, 0, sizeof(res));
437
438                 pdata.sysclk = sysclk;
439
440                 prop = of_get_property(np, "reg", NULL);
441                 if (!prop)
442                         goto err;
443                 pdata.bus_num = *(u32 *)prop;
444
445                 prop = of_get_property(np, "cell-index", NULL);
446                 if (prop)
447                         i = *(u32 *)prop;
448
449                 prop = of_get_property(np, "mode", NULL);
450                 if (prop && !strcmp(prop, "cpu-qe"))
451                         pdata.qe_mode = 1;
452
453                 for (j = 0; j < num_board_infos; j++) {
454                         if (board_infos[j].bus_num == pdata.bus_num)
455                                 pdata.max_chipselect++;
456                 }
457
458                 if (!pdata.max_chipselect)
459                         continue;
460
461                 ret = of_address_to_resource(np, 0, &res[0]);
462                 if (ret)
463                         goto err;
464
465                 ret = of_irq_to_resource(np, 0, &res[1]);
466                 if (ret == NO_IRQ)
467                         goto err;
468
469                 pdev = platform_device_alloc("mpc83xx_spi", i);
470                 if (!pdev)
471                         goto err;
472
473                 ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
474                 if (ret)
475                         goto unreg;
476
477                 ret = platform_device_add_resources(pdev, res,
478                                                     ARRAY_SIZE(res));
479                 if (ret)
480                         goto unreg;
481
482                 ret = platform_device_add(pdev);
483                 if (ret)
484                         goto unreg;
485
486                 goto next;
487 unreg:
488                 platform_device_del(pdev);
489 err:
490                 pr_err("%s: registration failed\n", np->full_name);
491 next:
492                 i++;
493         }
494
495         return i;
496 }
497
498 int __init fsl_spi_init(struct spi_board_info *board_infos,
499                         unsigned int num_board_infos,
500                         void (*activate_cs)(u8 cs, u8 polarity),
501                         void (*deactivate_cs)(u8 cs, u8 polarity))
502 {
503         u32 sysclk = -1;
504         int ret;
505
506 #ifdef CONFIG_QUICC_ENGINE
507         /* SPI controller is either clocked from QE or SoC clock */
508         sysclk = get_brgfreq();
509 #endif
510         if (sysclk == -1) {
511                 sysclk = fsl_get_sys_freq();
512                 if (sysclk == -1)
513                         return -ENODEV;
514         }
515
516         ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
517                                num_board_infos, activate_cs, deactivate_cs);
518         if (!ret)
519                 of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
520                                  num_board_infos, activate_cs, deactivate_cs);
521
522         return spi_register_board_info(board_infos, num_board_infos);
523 }
524
525 #if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx)
526 static __be32 __iomem *rstcr;
527
528 static int __init setup_rstcr(void)
529 {
530         struct device_node *np;
531         np = of_find_node_by_name(NULL, "global-utilities");
532         if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
533                 const u32 *prop = of_get_property(np, "reg", NULL);
534                 if (prop) {
535                         /* map reset control register
536                          * 0xE00B0 is offset of reset control register
537                          */
538                         rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff);
539                         if (!rstcr)
540                                 printk (KERN_EMERG "Error: reset control "
541                                                 "register not mapped!\n");
542                 }
543         } else
544                 printk (KERN_INFO "rstcr compatible register does not exist!\n");
545         if (np)
546                 of_node_put(np);
547         return 0;
548 }
549
550 arch_initcall(setup_rstcr);
551
552 void fsl_rstcr_restart(char *cmd)
553 {
554         local_irq_disable();
555         if (rstcr)
556                 /* set reset control register */
557                 out_be32(rstcr, 0x2);   /* HRESET_REQ */
558
559         while (1) ;
560 }
561 #endif
562
563 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
564 struct platform_diu_data_ops diu_ops;
565 EXPORT_SYMBOL(diu_ops);
566 #endif