2 * Broadcom specific AMBA
3 * Broadcom MIPS32 74K core driver
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>
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 /* The 47162a0 hangs when reading MIPS DMP registers registers */
23 static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device
*dev
)
25 return dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM47162
&&
26 dev
->bus
->chipinfo
.rev
== 0 && dev
->id
.id
== BCMA_CORE_MIPS_74K
;
29 /* The 5357b0 hangs when reading USB20H DMP registers */
30 static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device
*dev
)
32 return (dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM5357
||
33 dev
->bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM4749
) &&
34 dev
->bus
->chipinfo
.pkg
== 11 &&
35 dev
->id
.id
== BCMA_CORE_USB20_HOST
;
38 static inline u32
mips_read32(struct bcma_drv_mips
*mcore
,
41 return bcma_read32(mcore
->core
, offset
);
44 static inline void mips_write32(struct bcma_drv_mips
*mcore
,
48 bcma_write32(mcore
->core
, offset
, value
);
51 static const u32 ipsflag_irq_mask
[] = {
53 BCMA_MIPS_IPSFLAG_IRQ1
,
54 BCMA_MIPS_IPSFLAG_IRQ2
,
55 BCMA_MIPS_IPSFLAG_IRQ3
,
56 BCMA_MIPS_IPSFLAG_IRQ4
,
59 static const u32 ipsflag_irq_shift
[] = {
61 BCMA_MIPS_IPSFLAG_IRQ1_SHIFT
,
62 BCMA_MIPS_IPSFLAG_IRQ2_SHIFT
,
63 BCMA_MIPS_IPSFLAG_IRQ3_SHIFT
,
64 BCMA_MIPS_IPSFLAG_IRQ4_SHIFT
,
67 static u32
bcma_core_mips_irqflag(struct bcma_device
*dev
)
71 if (bcma_core_mips_bcm47162a0_quirk(dev
))
72 return dev
->core_index
;
73 if (bcma_core_mips_bcm5357b0_quirk(dev
))
74 return dev
->core_index
;
75 flag
= bcma_aread32(dev
, BCMA_MIPS_OOBSELOUTA30
);
83 /* Get the MIPS IRQ assignment for a specified device.
84 * If unassigned, 0 is returned.
85 * If disabled, 5 is returned.
86 * If not supported, 6 is returned.
88 unsigned int bcma_core_mips_irq(struct bcma_device
*dev
)
90 struct bcma_device
*mdev
= dev
->bus
->drv_mips
.core
;
94 irqflag
= bcma_core_mips_irqflag(dev
);
98 for (irq
= 0; irq
<= 4; irq
++)
99 if (bcma_read32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(irq
)) &
105 EXPORT_SYMBOL(bcma_core_mips_irq
);
107 static void bcma_core_mips_set_irq(struct bcma_device
*dev
, unsigned int irq
)
109 unsigned int oldirq
= bcma_core_mips_irq(dev
);
110 struct bcma_bus
*bus
= dev
->bus
;
111 struct bcma_device
*mdev
= bus
->drv_mips
.core
;
114 irqflag
= bcma_core_mips_irqflag(dev
);
119 /* clear the old irq */
121 bcma_write32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(0),
122 bcma_read32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(0)) &
124 else if (oldirq
!= 5)
125 bcma_write32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(oldirq
), 0);
127 /* assign the new one */
129 bcma_write32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(0),
130 bcma_read32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(0)) |
133 u32 irqinitmask
= bcma_read32(mdev
,
134 BCMA_MIPS_MIPS74K_INTMASK(irq
));
136 struct bcma_device
*core
;
138 /* backplane irq line is in use, find out who uses
139 * it and set user to irq 0
141 list_for_each_entry(core
, &bus
->cores
, list
) {
142 if ((1 << bcma_core_mips_irqflag(core
)) ==
144 bcma_core_mips_set_irq(core
, 0);
149 bcma_write32(mdev
, BCMA_MIPS_MIPS74K_INTMASK(irq
),
153 bcma_debug(bus
, "set_irq: core 0x%04x, irq %d => %d\n",
154 dev
->id
.id
, oldirq
<= 4 ? oldirq
+ 2 : 0, irq
+ 2);
157 static void bcma_core_mips_set_irq_name(struct bcma_bus
*bus
, unsigned int irq
,
160 struct bcma_device
*core
;
162 core
= bcma_find_core_unit(bus
, coreid
, unit
);
165 "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n",
170 bcma_core_mips_set_irq(core
, irq
);
173 static void bcma_core_mips_print_irq(struct bcma_device
*dev
, unsigned int irq
)
176 static const char *irq_name
[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
177 printk(KERN_DEBUG KBUILD_MODNAME
": core 0x%04x, irq :", dev
->id
.id
);
178 for (i
= 0; i
<= 6; i
++)
179 printk(" %s%s", irq_name
[i
], i
== irq
? "*" : " ");
183 static void bcma_core_mips_dump_irq(struct bcma_bus
*bus
)
185 struct bcma_device
*core
;
187 list_for_each_entry(core
, &bus
->cores
, list
) {
188 bcma_core_mips_print_irq(core
, bcma_core_mips_irq(core
));
192 u32
bcma_cpu_clock(struct bcma_drv_mips
*mcore
)
194 struct bcma_bus
*bus
= mcore
->core
->bus
;
196 if (bus
->drv_cc
.capabilities
& BCMA_CC_CAP_PMU
)
197 return bcma_pmu_get_cpu_clock(&bus
->drv_cc
);
199 bcma_err(bus
, "No PMU available, need this to get the cpu clock\n");
202 EXPORT_SYMBOL(bcma_cpu_clock
);
204 static void bcma_core_mips_flash_detect(struct bcma_drv_mips
*mcore
)
206 struct bcma_bus
*bus
= mcore
->core
->bus
;
207 struct bcma_drv_cc
*cc
= &bus
->drv_cc
;
209 switch (cc
->capabilities
& BCMA_CC_CAP_FLASHT
) {
210 case BCMA_CC_FLASHT_STSER
:
211 case BCMA_CC_FLASHT_ATSER
:
212 bcma_debug(bus
, "Found serial flash\n");
213 bcma_sflash_init(cc
);
215 case BCMA_CC_FLASHT_PARA
:
216 bcma_debug(bus
, "Found parallel flash\n");
217 cc
->pflash
.present
= true;
218 cc
->pflash
.window
= BCMA_SOC_FLASH2
;
219 cc
->pflash
.window_size
= BCMA_SOC_FLASH2_SZ
;
221 if ((bcma_read32(cc
->core
, BCMA_CC_FLASH_CFG
) &
222 BCMA_CC_FLASH_CFG_DS
) == 0)
223 cc
->pflash
.buswidth
= 1;
225 cc
->pflash
.buswidth
= 2;
228 bcma_err(bus
, "Flash type not supported\n");
231 if (cc
->core
->id
.rev
== 38 ||
232 bus
->chipinfo
.id
== BCMA_CHIP_ID_BCM4706
) {
233 if (cc
->capabilities
& BCMA_CC_CAP_NFLASH
) {
234 bcma_debug(bus
, "Found NAND flash\n");
235 bcma_nflash_init(cc
);
240 void bcma_core_mips_early_init(struct bcma_drv_mips
*mcore
)
242 struct bcma_bus
*bus
= mcore
->core
->bus
;
244 if (mcore
->early_setup_done
)
247 bcma_chipco_serial_init(&bus
->drv_cc
);
248 bcma_core_mips_flash_detect(mcore
);
250 mcore
->early_setup_done
= true;
253 void bcma_core_mips_init(struct bcma_drv_mips
*mcore
)
255 struct bcma_bus
*bus
;
256 struct bcma_device
*core
;
257 bus
= mcore
->core
->bus
;
259 if (mcore
->setup_done
)
262 bcma_debug(bus
, "Initializing MIPS core...\n");
264 bcma_core_mips_early_init(mcore
);
266 switch (bus
->chipinfo
.id
) {
267 case BCMA_CHIP_ID_BCM4716
:
268 case BCMA_CHIP_ID_BCM4748
:
269 bcma_core_mips_set_irq_name(bus
, 1, BCMA_CORE_80211
, 0);
270 bcma_core_mips_set_irq_name(bus
, 2, BCMA_CORE_MAC_GBIT
, 0);
271 bcma_core_mips_set_irq_name(bus
, 3, BCMA_CORE_USB20_HOST
, 0);
272 bcma_core_mips_set_irq_name(bus
, 4, BCMA_CORE_PCIE
, 0);
273 bcma_core_mips_set_irq_name(bus
, 0, BCMA_CORE_CHIPCOMMON
, 0);
274 bcma_core_mips_set_irq_name(bus
, 0, BCMA_CORE_I2S
, 0);
276 case BCMA_CHIP_ID_BCM5356
:
277 case BCMA_CHIP_ID_BCM47162
:
278 case BCMA_CHIP_ID_BCM53572
:
279 bcma_core_mips_set_irq_name(bus
, 1, BCMA_CORE_80211
, 0);
280 bcma_core_mips_set_irq_name(bus
, 2, BCMA_CORE_MAC_GBIT
, 0);
281 bcma_core_mips_set_irq_name(bus
, 0, BCMA_CORE_CHIPCOMMON
, 0);
283 case BCMA_CHIP_ID_BCM5357
:
284 case BCMA_CHIP_ID_BCM4749
:
285 bcma_core_mips_set_irq_name(bus
, 1, BCMA_CORE_80211
, 0);
286 bcma_core_mips_set_irq_name(bus
, 2, BCMA_CORE_MAC_GBIT
, 0);
287 bcma_core_mips_set_irq_name(bus
, 3, BCMA_CORE_USB20_HOST
, 0);
288 bcma_core_mips_set_irq_name(bus
, 0, BCMA_CORE_CHIPCOMMON
, 0);
289 bcma_core_mips_set_irq_name(bus
, 0, BCMA_CORE_I2S
, 0);
291 case BCMA_CHIP_ID_BCM4706
:
292 bcma_core_mips_set_irq_name(bus
, 1, BCMA_CORE_PCIE
, 0);
293 bcma_core_mips_set_irq_name(bus
, 2, BCMA_CORE_4706_MAC_GBIT
,
295 bcma_core_mips_set_irq_name(bus
, 3, BCMA_CORE_PCIE
, 1);
296 bcma_core_mips_set_irq_name(bus
, 4, BCMA_CORE_USB20_HOST
, 0);
297 bcma_core_mips_set_irq_name(bus
, 0, BCMA_CORE_4706_CHIPCOMMON
,
301 list_for_each_entry(core
, &bus
->cores
, list
) {
302 core
->irq
= bcma_core_irq(core
);
305 "Unknown device (0x%x) found, can not configure IRQs\n",
308 bcma_debug(bus
, "IRQ reconfiguration done\n");
309 bcma_core_mips_dump_irq(bus
);
311 mcore
->setup_done
= true;