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/serial.h>
18 #include <linux/serial_core.h>
19 #include <linux/serial_reg.h>
20 #include <linux/time.h>
21 #ifdef CONFIG_BCM47XX
22 #include <linux/bcm47xx_nvram.h>
23 #endif
24
25 enum bcma_boot_dev {
26 BCMA_BOOT_DEV_UNK = 0,
27 BCMA_BOOT_DEV_ROM,
28 BCMA_BOOT_DEV_PARALLEL,
29 BCMA_BOOT_DEV_SERIAL,
30 BCMA_BOOT_DEV_NAND,
31 };
32
33 /* The 47162a0 hangs when reading MIPS DMP registers registers */
bcma_core_mips_bcm47162a0_quirk(struct bcma_device * dev)34 static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev)
35 {
36 return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 &&
37 dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K;
38 }
39
40 /* The 5357b0 hangs when reading USB20H DMP registers */
bcma_core_mips_bcm5357b0_quirk(struct bcma_device * dev)41 static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev)
42 {
43 return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 ||
44 dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) &&
45 dev->bus->chipinfo.pkg == 11 &&
46 dev->id.id == BCMA_CORE_USB20_HOST;
47 }
48
mips_read32(struct bcma_drv_mips * mcore,u16 offset)49 static inline u32 mips_read32(struct bcma_drv_mips *mcore,
50 u16 offset)
51 {
52 return bcma_read32(mcore->core, offset);
53 }
54
bcma_core_mips_irqflag(struct bcma_device * dev)55 static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
56 {
57 u32 flag;
58
59 if (bcma_core_mips_bcm47162a0_quirk(dev))
60 return dev->core_index;
61 if (bcma_core_mips_bcm5357b0_quirk(dev))
62 return dev->core_index;
63 flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
64
65 if (flag)
66 return flag & 0x1F;
67 else
68 return 0x3f;
69 }
70
71 /* Get the MIPS IRQ assignment for a specified device.
72 * If unassigned, 0 is returned.
73 * If disabled, 5 is returned.
74 * If not supported, 6 is returned.
75 */
bcma_core_mips_irq(struct bcma_device * dev)76 unsigned int bcma_core_mips_irq(struct bcma_device *dev)
77 {
78 struct bcma_device *mdev = dev->bus->drv_mips.core;
79 u32 irqflag;
80 unsigned int irq;
81
82 irqflag = bcma_core_mips_irqflag(dev);
83 if (irqflag == 0x3f)
84 return 6;
85
86 for (irq = 0; irq <= 4; irq++)
87 if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
88 (1 << irqflag))
89 return irq;
90
91 return 5;
92 }
93
bcma_core_mips_set_irq(struct bcma_device * dev,unsigned int irq)94 static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
95 {
96 unsigned int oldirq = bcma_core_mips_irq(dev);
97 struct bcma_bus *bus = dev->bus;
98 struct bcma_device *mdev = bus->drv_mips.core;
99 u32 irqflag;
100
101 irqflag = bcma_core_mips_irqflag(dev);
102 BUG_ON(oldirq == 6);
103
104 dev->irq = irq + 2;
105
106 /* clear the old irq */
107 if (oldirq == 0)
108 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
109 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
110 ~(1 << irqflag));
111 else if (oldirq != 5)
112 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
113
114 /* assign the new one */
115 if (irq == 0) {
116 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
117 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) |
118 (1 << irqflag));
119 } else {
120 u32 irqinitmask = bcma_read32(mdev,
121 BCMA_MIPS_MIPS74K_INTMASK(irq));
122 if (irqinitmask) {
123 struct bcma_device *core;
124
125 /* backplane irq line is in use, find out who uses
126 * it and set user to irq 0
127 */
128 list_for_each_entry(core, &bus->cores, list) {
129 if ((1 << bcma_core_mips_irqflag(core)) ==
130 irqinitmask) {
131 bcma_core_mips_set_irq(core, 0);
132 break;
133 }
134 }
135 }
136 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq),
137 1 << irqflag);
138 }
139
140 bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n",
141 dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2);
142 }
143
bcma_core_mips_set_irq_name(struct bcma_bus * bus,unsigned int irq,u16 coreid,u8 unit)144 static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq,
145 u16 coreid, u8 unit)
146 {
147 struct bcma_device *core;
148
149 core = bcma_find_core_unit(bus, coreid, unit);
150 if (!core) {
151 bcma_warn(bus,
152 "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n",
153 coreid, unit);
154 return;
155 }
156
157 bcma_core_mips_set_irq(core, irq);
158 }
159
bcma_core_mips_print_irq(struct bcma_device * dev,unsigned int irq)160 static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq)
161 {
162 int i;
163 static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
164 char interrupts[25];
165 char *ints = interrupts;
166
167 for (i = 0; i < ARRAY_SIZE(irq_name); i++)
168 ints += sprintf(ints, " %s%c",
169 irq_name[i], i == irq ? '*' : ' ');
170
171 bcma_debug(dev->bus, "core 0x%04x, irq:%s\n", dev->id.id, interrupts);
172 }
173
bcma_core_mips_dump_irq(struct bcma_bus * bus)174 static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
175 {
176 struct bcma_device *core;
177
178 list_for_each_entry(core, &bus->cores, list) {
179 bcma_core_mips_print_irq(core, bcma_core_mips_irq(core));
180 }
181 }
182
bcma_cpu_clock(struct bcma_drv_mips * mcore)183 u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
184 {
185 struct bcma_bus *bus = mcore->core->bus;
186
187 if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
188 return bcma_pmu_get_cpu_clock(&bus->drv_cc);
189
190 bcma_err(bus, "No PMU available, need this to get the cpu clock\n");
191 return 0;
192 }
193 EXPORT_SYMBOL(bcma_cpu_clock);
194
bcma_boot_dev(struct bcma_bus * bus)195 static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus)
196 {
197 struct bcma_drv_cc *cc = &bus->drv_cc;
198 u8 cc_rev = cc->core->id.rev;
199
200 if (cc_rev == 42) {
201 struct bcma_device *core;
202
203 core = bcma_find_core(bus, BCMA_CORE_NS_ROM);
204 if (core) {
205 switch (bcma_aread32(core, BCMA_IOST) &
206 BCMA_NS_ROM_IOST_BOOT_DEV_MASK) {
207 case BCMA_NS_ROM_IOST_BOOT_DEV_NOR:
208 return BCMA_BOOT_DEV_SERIAL;
209 case BCMA_NS_ROM_IOST_BOOT_DEV_NAND:
210 return BCMA_BOOT_DEV_NAND;
211 case BCMA_NS_ROM_IOST_BOOT_DEV_ROM:
212 default:
213 return BCMA_BOOT_DEV_ROM;
214 }
215 }
216 } else {
217 if (cc_rev == 38) {
218 if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)
219 return BCMA_BOOT_DEV_NAND;
220 else if (cc->status & BIT(5))
221 return BCMA_BOOT_DEV_ROM;
222 }
223
224 if ((cc->capabilities & BCMA_CC_CAP_FLASHT) ==
225 BCMA_CC_FLASHT_PARA)
226 return BCMA_BOOT_DEV_PARALLEL;
227 else
228 return BCMA_BOOT_DEV_SERIAL;
229 }
230
231 return BCMA_BOOT_DEV_SERIAL;
232 }
233
bcma_core_mips_nvram_init(struct bcma_drv_mips * mcore)234 static void bcma_core_mips_nvram_init(struct bcma_drv_mips *mcore)
235 {
236 struct bcma_bus *bus = mcore->core->bus;
237 enum bcma_boot_dev boot_dev;
238
239 /* Determine flash type this SoC boots from */
240 boot_dev = bcma_boot_dev(bus);
241 switch (boot_dev) {
242 case BCMA_BOOT_DEV_PARALLEL:
243 case BCMA_BOOT_DEV_SERIAL:
244 #ifdef CONFIG_BCM47XX
245 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH2,
246 BCMA_SOC_FLASH2_SZ);
247 #endif
248 break;
249 case BCMA_BOOT_DEV_NAND:
250 #ifdef CONFIG_BCM47XX
251 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH1,
252 BCMA_SOC_FLASH1_SZ);
253 #endif
254 break;
255 default:
256 break;
257 }
258 }
259
bcma_core_mips_early_init(struct bcma_drv_mips * mcore)260 void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)
261 {
262 struct bcma_bus *bus = mcore->core->bus;
263
264 if (mcore->early_setup_done)
265 return;
266
267 bcma_chipco_serial_init(&bus->drv_cc);
268 bcma_core_mips_nvram_init(mcore);
269
270 mcore->early_setup_done = true;
271 }
272
bcma_fix_i2s_irqflag(struct bcma_bus * bus)273 static void bcma_fix_i2s_irqflag(struct bcma_bus *bus)
274 {
275 struct bcma_device *cpu, *pcie, *i2s;
276
277 /* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK)
278 * (IRQ flags > 7 are ignored when setting the interrupt masks)
279 */
280 if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 &&
281 bus->chipinfo.id != BCMA_CHIP_ID_BCM4748)
282 return;
283
284 cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
285 pcie = bcma_find_core(bus, BCMA_CORE_PCIE);
286 i2s = bcma_find_core(bus, BCMA_CORE_I2S);
287 if (cpu && pcie && i2s &&
288 bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
289 bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
290 bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) {
291 bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504);
292 bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504);
293 bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87);
294 bcma_debug(bus,
295 "Moved i2s interrupt to oob line 7 instead of 8\n");
296 }
297 }
298
bcma_core_mips_init(struct bcma_drv_mips * mcore)299 void bcma_core_mips_init(struct bcma_drv_mips *mcore)
300 {
301 struct bcma_bus *bus;
302 struct bcma_device *core;
303 bus = mcore->core->bus;
304
305 if (mcore->setup_done)
306 return;
307
308 bcma_debug(bus, "Initializing MIPS core...\n");
309
310 bcma_core_mips_early_init(mcore);
311
312 bcma_fix_i2s_irqflag(bus);
313
314 switch (bus->chipinfo.id) {
315 case BCMA_CHIP_ID_BCM4716:
316 case BCMA_CHIP_ID_BCM4748:
317 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
318 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
319 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
320 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0);
321 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
322 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
323 break;
324 case BCMA_CHIP_ID_BCM5356:
325 case BCMA_CHIP_ID_BCM47162:
326 case BCMA_CHIP_ID_BCM53572:
327 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
328 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
329 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
330 break;
331 case BCMA_CHIP_ID_BCM5357:
332 case BCMA_CHIP_ID_BCM4749:
333 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
334 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
335 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
336 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
337 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
338 break;
339 case BCMA_CHIP_ID_BCM4706:
340 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0);
341 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT,
342 0);
343 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1);
344 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0);
345 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON,
346 0);
347 break;
348 default:
349 list_for_each_entry(core, &bus->cores, list) {
350 core->irq = bcma_core_irq(core, 0);
351 }
352 bcma_err(bus,
353 "Unknown device (0x%x) found, can not configure IRQs\n",
354 bus->chipinfo.id);
355 }
356 bcma_debug(bus, "IRQ reconfiguration done\n");
357 bcma_core_mips_dump_irq(bus);
358
359 mcore->setup_done = true;
360 }
361