2 * Broadcom specific AMBA
3 * Broadcom MIPS32 74K core driver
5 * Copyright 2009, Broadcom Corporation
10 * Licensed under the GNU/GPL. See COPYING for details.
13 #include "bcma_private.h"
15 #include <linux/bcma/bcma.h>
17 #include <linux/serial.h>
18 #include <linux/serial_core.h>
19 #include <linux/serial_reg.h>
20 #include <linux/time.h>
22 #include <linux/bcm47xx_nvram.h>
26 BCMA_BOOT_DEV_UNK = 0,
28 BCMA_BOOT_DEV_PARALLEL,
33 /* The 47162a0 hangs when reading MIPS DMP registers registers */
34 static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev)
36 return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 &&
37 dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K;
40 /* The 5357b0 hangs when reading USB20H DMP registers */
41 static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev)
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;
49 static inline u32 mips_read32(struct bcma_drv_mips *mcore,
52 return bcma_read32(mcore->core, offset);
55 static inline void mips_write32(struct bcma_drv_mips *mcore,
59 bcma_write32(mcore->core, offset, value);
62 static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
66 if (bcma_core_mips_bcm47162a0_quirk(dev))
67 return dev->core_index;
68 if (bcma_core_mips_bcm5357b0_quirk(dev))
69 return dev->core_index;
70 flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
78 /* Get the MIPS IRQ assignment for a specified device.
79 * If unassigned, 0 is returned.
80 * If disabled, 5 is returned.
81 * If not supported, 6 is returned.
83 unsigned int bcma_core_mips_irq(struct bcma_device *dev)
85 struct bcma_device *mdev = dev->bus->drv_mips.core;
89 irqflag = bcma_core_mips_irqflag(dev);
93 for (irq = 0; irq <= 4; irq++)
94 if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
101 static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
103 unsigned int oldirq = bcma_core_mips_irq(dev);
104 struct bcma_bus *bus = dev->bus;
105 struct bcma_device *mdev = bus->drv_mips.core;
108 irqflag = bcma_core_mips_irqflag(dev);
113 /* clear the old irq */
115 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
116 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
118 else if (oldirq != 5)
119 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
121 /* assign the new one */
123 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
124 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) |
127 u32 irqinitmask = bcma_read32(mdev,
128 BCMA_MIPS_MIPS74K_INTMASK(irq));
130 struct bcma_device *core;
132 /* backplane irq line is in use, find out who uses
133 * it and set user to irq 0
135 list_for_each_entry(core, &bus->cores, list) {
136 if ((1 << bcma_core_mips_irqflag(core)) ==
138 bcma_core_mips_set_irq(core, 0);
143 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq),
147 bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n",
148 dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2);
151 static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq,
154 struct bcma_device *core;
156 core = bcma_find_core_unit(bus, coreid, unit);
159 "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n",
164 bcma_core_mips_set_irq(core, irq);
167 static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq)
170 static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
172 char *ints = interrupts;
174 for (i = 0; i < ARRAY_SIZE(irq_name); i++)
175 ints += sprintf(ints, " %s%c",
176 irq_name[i], i == irq ? '*' : ' ');
178 bcma_debug(dev->bus, "core 0x%04x, irq:%s\n", dev->id.id, interrupts);
181 static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
183 struct bcma_device *core;
185 list_for_each_entry(core, &bus->cores, list) {
186 bcma_core_mips_print_irq(core, bcma_core_mips_irq(core));
190 u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
192 struct bcma_bus *bus = mcore->core->bus;
194 if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
195 return bcma_pmu_get_cpu_clock(&bus->drv_cc);
197 bcma_err(bus, "No PMU available, need this to get the cpu clock\n");
200 EXPORT_SYMBOL(bcma_cpu_clock);
202 static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus)
204 struct bcma_drv_cc *cc = &bus->drv_cc;
205 u8 cc_rev = cc->core->id.rev;
208 struct bcma_device *core;
210 core = bcma_find_core(bus, BCMA_CORE_NS_ROM);
212 switch (bcma_aread32(core, BCMA_IOST) &
213 BCMA_NS_ROM_IOST_BOOT_DEV_MASK) {
214 case BCMA_NS_ROM_IOST_BOOT_DEV_NOR:
215 return BCMA_BOOT_DEV_SERIAL;
216 case BCMA_NS_ROM_IOST_BOOT_DEV_NAND:
217 return BCMA_BOOT_DEV_NAND;
218 case BCMA_NS_ROM_IOST_BOOT_DEV_ROM:
220 return BCMA_BOOT_DEV_ROM;
225 if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)
226 return BCMA_BOOT_DEV_NAND;
227 else if (cc->status & BIT(5))
228 return BCMA_BOOT_DEV_ROM;
231 if ((cc->capabilities & BCMA_CC_CAP_FLASHT) ==
233 return BCMA_BOOT_DEV_PARALLEL;
235 return BCMA_BOOT_DEV_SERIAL;
238 return BCMA_BOOT_DEV_SERIAL;
241 static void bcma_core_mips_nvram_init(struct bcma_drv_mips *mcore)
243 struct bcma_bus *bus = mcore->core->bus;
244 enum bcma_boot_dev boot_dev;
246 /* Determine flash type this SoC boots from */
247 boot_dev = bcma_boot_dev(bus);
249 case BCMA_BOOT_DEV_PARALLEL:
250 case BCMA_BOOT_DEV_SERIAL:
251 #ifdef CONFIG_BCM47XX
252 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH2,
256 case BCMA_BOOT_DEV_NAND:
257 #ifdef CONFIG_BCM47XX
258 bcm47xx_nvram_init_from_mem(BCMA_SOC_FLASH1,
267 void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)
269 struct bcma_bus *bus = mcore->core->bus;
271 if (mcore->early_setup_done)
274 bcma_chipco_serial_init(&bus->drv_cc);
275 bcma_core_mips_nvram_init(mcore);
277 mcore->early_setup_done = true;
280 static void bcma_fix_i2s_irqflag(struct bcma_bus *bus)
282 struct bcma_device *cpu, *pcie, *i2s;
284 /* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK)
285 * (IRQ flags > 7 are ignored when setting the interrupt masks)
287 if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 &&
288 bus->chipinfo.id != BCMA_CHIP_ID_BCM4748)
291 cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
292 pcie = bcma_find_core(bus, BCMA_CORE_PCIE);
293 i2s = bcma_find_core(bus, BCMA_CORE_I2S);
294 if (cpu && pcie && i2s &&
295 bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
296 bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
297 bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) {
298 bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504);
299 bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504);
300 bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87);
302 "Moved i2s interrupt to oob line 7 instead of 8\n");
306 void bcma_core_mips_init(struct bcma_drv_mips *mcore)
308 struct bcma_bus *bus;
309 struct bcma_device *core;
310 bus = mcore->core->bus;
312 if (mcore->setup_done)
315 bcma_debug(bus, "Initializing MIPS core...\n");
317 bcma_core_mips_early_init(mcore);
319 bcma_fix_i2s_irqflag(bus);
321 switch (bus->chipinfo.id) {
322 case BCMA_CHIP_ID_BCM4716:
323 case BCMA_CHIP_ID_BCM4748:
324 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
325 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
326 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
327 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0);
328 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
329 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
331 case BCMA_CHIP_ID_BCM5356:
332 case BCMA_CHIP_ID_BCM47162:
333 case BCMA_CHIP_ID_BCM53572:
334 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
335 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
336 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
338 case BCMA_CHIP_ID_BCM5357:
339 case BCMA_CHIP_ID_BCM4749:
340 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
341 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
342 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
343 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
344 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
346 case BCMA_CHIP_ID_BCM4706:
347 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0);
348 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT,
350 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1);
351 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0);
352 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON,
356 list_for_each_entry(core, &bus->cores, list) {
357 core->irq = bcma_core_irq(core, 0);
360 "Unknown device (0x%x) found, can not configure IRQs\n",
363 bcma_debug(bus, "IRQ reconfiguration done\n");
364 bcma_core_mips_dump_irq(bus);
366 mcore->setup_done = true;