arm: dts: rk3288-android: use secure efuse
[firefly-linux-kernel-4.4.55.git] / drivers / bcma / driver_mips.c
1 /*
2  * Broadcom specific AMBA
3  * Broadcom MIPS32 74K core driver
4  *
5  * Copyright 2009, Broadcom Corporation
6  * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
7  * Copyright 2010, Bernhard Loos <bernhardloos@googlemail.com>
8  * Copyright 2011, Hauke Mehrtens <hauke@hauke-m.de>
9  *
10  * Licensed under the GNU/GPL. See COPYING for details.
11  */
12
13 #include "bcma_private.h"
14
15 #include <linux/bcma/bcma.h>
16
17 #include <linux/mtd/physmap.h>
18 #include <linux/platform_device.h>
19 #include <linux/serial.h>
20 #include <linux/serial_core.h>
21 #include <linux/serial_reg.h>
22 #include <linux/time.h>
23 #ifdef CONFIG_BCM47XX
24 #include <linux/bcm47xx_nvram.h>
25 #endif
26
27 enum bcma_boot_dev {
28         BCMA_BOOT_DEV_UNK = 0,
29         BCMA_BOOT_DEV_ROM,
30         BCMA_BOOT_DEV_PARALLEL,
31         BCMA_BOOT_DEV_SERIAL,
32         BCMA_BOOT_DEV_NAND,
33 };
34
35 static const char * const part_probes[] = { "bcm47xxpart", NULL };
36
37 static struct physmap_flash_data bcma_pflash_data = {
38         .part_probe_types       = part_probes,
39 };
40
41 static struct resource bcma_pflash_resource = {
42         .name   = "bcma_pflash",
43         .flags  = IORESOURCE_MEM,
44 };
45
46 struct platform_device bcma_pflash_dev = {
47         .name           = "physmap-flash",
48         .dev            = {
49                 .platform_data  = &bcma_pflash_data,
50         },
51         .resource       = &bcma_pflash_resource,
52         .num_resources  = 1,
53 };
54
55 /* The 47162a0 hangs when reading MIPS DMP registers registers */
56 static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev)
57 {
58         return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 &&
59                dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K;
60 }
61
62 /* The 5357b0 hangs when reading USB20H DMP registers */
63 static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev)
64 {
65         return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 ||
66                 dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) &&
67                dev->bus->chipinfo.pkg == 11 &&
68                dev->id.id == BCMA_CORE_USB20_HOST;
69 }
70
71 static inline u32 mips_read32(struct bcma_drv_mips *mcore,
72                               u16 offset)
73 {
74         return bcma_read32(mcore->core, offset);
75 }
76
77 static inline void mips_write32(struct bcma_drv_mips *mcore,
78                                 u16 offset,
79                                 u32 value)
80 {
81         bcma_write32(mcore->core, offset, value);
82 }
83
84 static const u32 ipsflag_irq_mask[] = {
85         0,
86         BCMA_MIPS_IPSFLAG_IRQ1,
87         BCMA_MIPS_IPSFLAG_IRQ2,
88         BCMA_MIPS_IPSFLAG_IRQ3,
89         BCMA_MIPS_IPSFLAG_IRQ4,
90 };
91
92 static const u32 ipsflag_irq_shift[] = {
93         0,
94         BCMA_MIPS_IPSFLAG_IRQ1_SHIFT,
95         BCMA_MIPS_IPSFLAG_IRQ2_SHIFT,
96         BCMA_MIPS_IPSFLAG_IRQ3_SHIFT,
97         BCMA_MIPS_IPSFLAG_IRQ4_SHIFT,
98 };
99
100 static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
101 {
102         u32 flag;
103
104         if (bcma_core_mips_bcm47162a0_quirk(dev))
105                 return dev->core_index;
106         if (bcma_core_mips_bcm5357b0_quirk(dev))
107                 return dev->core_index;
108         flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
109
110         if (flag)
111                 return flag & 0x1F;
112         else
113                 return 0x3f;
114 }
115
116 /* Get the MIPS IRQ assignment for a specified device.
117  * If unassigned, 0 is returned.
118  * If disabled, 5 is returned.
119  * If not supported, 6 is returned.
120  */
121 unsigned int bcma_core_mips_irq(struct bcma_device *dev)
122 {
123         struct bcma_device *mdev = dev->bus->drv_mips.core;
124         u32 irqflag;
125         unsigned int irq;
126
127         irqflag = bcma_core_mips_irqflag(dev);
128         if (irqflag == 0x3f)
129                 return 6;
130
131         for (irq = 0; irq <= 4; irq++)
132                 if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
133                     (1 << irqflag))
134                         return irq;
135
136         return 5;
137 }
138
139 static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
140 {
141         unsigned int oldirq = bcma_core_mips_irq(dev);
142         struct bcma_bus *bus = dev->bus;
143         struct bcma_device *mdev = bus->drv_mips.core;
144         u32 irqflag;
145
146         irqflag = bcma_core_mips_irqflag(dev);
147         BUG_ON(oldirq == 6);
148
149         dev->irq = irq + 2;
150
151         /* clear the old irq */
152         if (oldirq == 0)
153                 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
154                             bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
155                             ~(1 << irqflag));
156         else if (oldirq != 5)
157                 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
158
159         /* assign the new one */
160         if (irq == 0) {
161                 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
162                             bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) |
163                             (1 << irqflag));
164         } else {
165                 u32 irqinitmask = bcma_read32(mdev,
166                                               BCMA_MIPS_MIPS74K_INTMASK(irq));
167                 if (irqinitmask) {
168                         struct bcma_device *core;
169
170                         /* backplane irq line is in use, find out who uses
171                          * it and set user to irq 0
172                          */
173                         list_for_each_entry(core, &bus->cores, list) {
174                                 if ((1 << bcma_core_mips_irqflag(core)) ==
175                                     irqinitmask) {
176                                         bcma_core_mips_set_irq(core, 0);
177                                         break;
178                                 }
179                         }
180                 }
181                 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq),
182                              1 << irqflag);
183         }
184
185         bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n",
186                    dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2);
187 }
188
189 static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq,
190                                         u16 coreid, u8 unit)
191 {
192         struct bcma_device *core;
193
194         core = bcma_find_core_unit(bus, coreid, unit);
195         if (!core) {
196                 bcma_warn(bus,
197                           "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n",
198                           coreid, unit);
199                 return;
200         }
201
202         bcma_core_mips_set_irq(core, irq);
203 }
204
205 static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq)
206 {
207         int i;
208         static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
209         printk(KERN_DEBUG KBUILD_MODNAME ": core 0x%04x, irq :", dev->id.id);
210         for (i = 0; i <= 6; i++)
211                 printk(" %s%s", irq_name[i], i == irq ? "*" : " ");
212         printk("\n");
213 }
214
215 static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
216 {
217         struct bcma_device *core;
218
219         list_for_each_entry(core, &bus->cores, list) {
220                 bcma_core_mips_print_irq(core, bcma_core_mips_irq(core));
221         }
222 }
223
224 u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
225 {
226         struct bcma_bus *bus = mcore->core->bus;
227
228         if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
229                 return bcma_pmu_get_cpu_clock(&bus->drv_cc);
230
231         bcma_err(bus, "No PMU available, need this to get the cpu clock\n");
232         return 0;
233 }
234 EXPORT_SYMBOL(bcma_cpu_clock);
235
236 static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus)
237 {
238         struct bcma_drv_cc *cc = &bus->drv_cc;
239         u8 cc_rev = cc->core->id.rev;
240
241         if (cc_rev == 42) {
242                 struct bcma_device *core;
243
244                 core = bcma_find_core(bus, BCMA_CORE_NS_ROM);
245                 if (core) {
246                         switch (bcma_aread32(core, BCMA_IOST) &
247                                 BCMA_NS_ROM_IOST_BOOT_DEV_MASK) {
248                         case BCMA_NS_ROM_IOST_BOOT_DEV_NOR:
249                                 return BCMA_BOOT_DEV_SERIAL;
250                         case BCMA_NS_ROM_IOST_BOOT_DEV_NAND:
251                                 return BCMA_BOOT_DEV_NAND;
252                         case BCMA_NS_ROM_IOST_BOOT_DEV_ROM:
253                         default:
254                                 return BCMA_BOOT_DEV_ROM;
255                         }
256                 }
257         } else {
258                 if (cc_rev == 38) {
259                         if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)
260                                 return BCMA_BOOT_DEV_NAND;
261                         else if (cc->status & BIT(5))
262                                 return BCMA_BOOT_DEV_ROM;
263                 }
264
265                 if ((cc->capabilities & BCMA_CC_CAP_FLASHT) ==
266                     BCMA_CC_FLASHT_PARA)
267                         return BCMA_BOOT_DEV_PARALLEL;
268                 else
269                         return BCMA_BOOT_DEV_SERIAL;
270         }
271
272         return BCMA_BOOT_DEV_SERIAL;
273 }
274
275 static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore)
276 {
277         struct bcma_bus *bus = mcore->core->bus;
278         struct bcma_drv_cc *cc = &bus->drv_cc;
279         struct bcma_pflash *pflash = &cc->pflash;
280         enum bcma_boot_dev boot_dev;
281
282         switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
283         case BCMA_CC_FLASHT_STSER:
284         case BCMA_CC_FLASHT_ATSER:
285                 bcma_debug(bus, "Found serial flash\n");
286                 bcma_sflash_init(cc);
287                 break;
288         case BCMA_CC_FLASHT_PARA:
289                 bcma_debug(bus, "Found parallel flash\n");
290                 pflash->present = true;
291                 pflash->window = BCMA_SOC_FLASH2;
292                 pflash->window_size = BCMA_SOC_FLASH2_SZ;
293
294                 if ((bcma_read32(cc->core, BCMA_CC_FLASH_CFG) &
295                      BCMA_CC_FLASH_CFG_DS) == 0)
296                         pflash->buswidth = 1;
297                 else
298                         pflash->buswidth = 2;
299
300                 bcma_pflash_data.width = pflash->buswidth;
301                 bcma_pflash_resource.start = pflash->window;
302                 bcma_pflash_resource.end = pflash->window + pflash->window_size;
303
304                 break;
305         default:
306                 bcma_err(bus, "Flash type not supported\n");
307         }
308
309         if (cc->core->id.rev == 38 ||
310             bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) {
311                 if (cc->capabilities & BCMA_CC_CAP_NFLASH) {
312                         bcma_debug(bus, "Found NAND flash\n");
313                         bcma_nflash_init(cc);
314                 }
315         }
316
317         /* Determine flash type this SoC boots from */
318         boot_dev = bcma_boot_dev(bus);
319         switch (boot_dev) {
320         case BCMA_BOOT_DEV_PARALLEL:
321         case BCMA_BOOT_DEV_SERIAL:
322 #ifdef CONFIG_BCM47XX
323                 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH2,
324                                             BCMA_SOC_FLASH2_SZ);
325 #endif
326                 break;
327         case BCMA_BOOT_DEV_NAND:
328 #ifdef CONFIG_BCM47XX
329                 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH1,
330                                             BCMA_SOC_FLASH1_SZ);
331 #endif
332                 break;
333         default:
334                 break;
335         }
336 }
337
338 void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)
339 {
340         struct bcma_bus *bus = mcore->core->bus;
341
342         if (mcore->early_setup_done)
343                 return;
344
345         bcma_chipco_serial_init(&bus->drv_cc);
346         bcma_core_mips_flash_detect(mcore);
347
348         mcore->early_setup_done = true;
349 }
350
351 static void bcma_fix_i2s_irqflag(struct bcma_bus *bus)
352 {
353         struct bcma_device *cpu, *pcie, *i2s;
354
355         /* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK)
356          * (IRQ flags > 7 are ignored when setting the interrupt masks)
357          */
358         if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 &&
359             bus->chipinfo.id != BCMA_CHIP_ID_BCM4748)
360                 return;
361
362         cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
363         pcie = bcma_find_core(bus, BCMA_CORE_PCIE);
364         i2s = bcma_find_core(bus, BCMA_CORE_I2S);
365         if (cpu && pcie && i2s &&
366             bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
367             bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
368             bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) {
369                 bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504);
370                 bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504);
371                 bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87);
372                 bcma_debug(bus,
373                            "Moved i2s interrupt to oob line 7 instead of 8\n");
374         }
375 }
376
377 void bcma_core_mips_init(struct bcma_drv_mips *mcore)
378 {
379         struct bcma_bus *bus;
380         struct bcma_device *core;
381         bus = mcore->core->bus;
382
383         if (mcore->setup_done)
384                 return;
385
386         bcma_debug(bus, "Initializing MIPS core...\n");
387
388         bcma_core_mips_early_init(mcore);
389
390         bcma_fix_i2s_irqflag(bus);
391
392         switch (bus->chipinfo.id) {
393         case BCMA_CHIP_ID_BCM4716:
394         case BCMA_CHIP_ID_BCM4748:
395                 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
396                 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
397                 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
398                 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0);
399                 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
400                 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
401                 break;
402         case BCMA_CHIP_ID_BCM5356:
403         case BCMA_CHIP_ID_BCM47162:
404         case BCMA_CHIP_ID_BCM53572:
405                 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
406                 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
407                 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
408                 break;
409         case BCMA_CHIP_ID_BCM5357:
410         case BCMA_CHIP_ID_BCM4749:
411                 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
412                 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
413                 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
414                 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
415                 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
416                 break;
417         case BCMA_CHIP_ID_BCM4706:
418                 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0);
419                 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT,
420                                             0);
421                 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1);
422                 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0);
423                 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON,
424                                             0);
425                 break;
426         default:
427                 list_for_each_entry(core, &bus->cores, list) {
428                         core->irq = bcma_core_irq(core, 0);
429                 }
430                 bcma_err(bus,
431                          "Unknown device (0x%x) found, can not configure IRQs\n",
432                          bus->chipinfo.id);
433         }
434         bcma_debug(bus, "IRQ reconfiguration done\n");
435         bcma_core_mips_dump_irq(bus);
436
437         mcore->setup_done = true;
438 }