1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
From 456ed3c197e8aec439ebeca39060c204d2429896 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Sun, 12 May 2013 12:24:19 +0100
Subject: [PATCH 036/454] Main bcm2708/bcm2709 linux port
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: popcornmix <popcornmix@gmail.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
bcm2709: Drop platform smp and timer init code
irq-bcm2836 handles this through these functions:
bcm2835_init_local_timer_frequency()
bcm2836_arm_irqchip_smp_init()
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
bcm270x: Use watchdog for reboot/poweroff
The watchdog driver already has support for reboot/poweroff.
Make use of this and remove the code from the platform files.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
---
arch/arm/mach-bcm/Kconfig | 1 +
arch/arm/mach-bcm/board_bcm2835.c | 9 +++++++++
arch/arm/mm/proc-v6.S | 15 ++++++++++++---
drivers/irqchip/irq-bcm2835.c | 7 ++++++-
drivers/mailbox/bcm2835-mailbox.c | 18 ++++++++++++++++--
5 files changed, 44 insertions(+), 6 deletions(-)
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -158,6 +158,7 @@ config ARCH_BCM2835
select FIQ
select PINCTRL
select PINCTRL_BCM2835
+ select MFD_SYSCON if ARCH_MULTI_V7
help
This enables support for the Broadcom BCM2835 and BCM2836 SoCs.
This SoC is used in the Raspberry Pi and Roku 2 devices.
--- a/arch/arm/mach-bcm/board_bcm2835.c
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -21,6 +21,8 @@
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+#include <linux/dma-mapping.h>
+
static void __init bcm2835_init(void)
{
struct device_node *np = of_find_node_by_path("/system");
@@ -35,6 +37,12 @@ static void __init bcm2835_init(void)
system_serial_low = val64;
}
+static void __init bcm2835_init_early(void)
+{
+ /* dwc_otg needs this for bounce buffers on non-aligned transfers */
+ init_dma_coherent_pool_size(SZ_1M);
+}
+
static const char * const bcm2835_compat[] = {
#ifdef CONFIG_ARCH_MULTI_V6
"brcm,bcm2835",
@@ -47,5 +55,6 @@ static const char * const bcm2835_compat
DT_MACHINE_START(BCM2835, "BCM2835")
.init_machine = bcm2835_init,
+ .init_early = bcm2835_init_early,
.dt_compat = bcm2835_compat
MACHINE_END
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -73,10 +73,19 @@ ENDPROC(cpu_v6_reset)
*
* IRQs are already disabled.
*/
+
+/* See jira SW-5991 for details of this workaround */
ENTRY(cpu_v6_do_idle)
- mov r1, #0
- mcr p15, 0, r1, c7, c10, 4 @ DWB - WFI may enter a low-power mode
- mcr p15, 0, r1, c7, c0, 4 @ wait for interrupt
+ .align 5
+ mov r1, #2
+1: subs r1, #1
+ nop
+ mcreq p15, 0, r1, c7, c10, 4 @ DWB - WFI may enter a low-power mode
+ mcreq p15, 0, r1, c7, c0, 4 @ wait for interrupt
+ nop
+ nop
+ nop
+ bne 1b
ret lr
ENTRY(cpu_v6_dcache_clean_area)
--- a/drivers/irqchip/irq-bcm2835.c
+++ b/drivers/irqchip/irq-bcm2835.c
@@ -54,7 +54,9 @@
#include <linux/regmap.h>
#include <asm/exception.h>
+#ifndef CONFIG_ARM64
#include <asm/mach/irq.h>
+#endif
/* Put the bank and irq (32 bits) into the hwirq */
#define MAKE_HWIRQ(b, n) (((b) << 5) | (n))
@@ -82,6 +84,7 @@
#define NR_BANKS 3
#define IRQS_PER_BANK 32
#define NUMBER_IRQS MAKE_HWIRQ(NR_BANKS, 0)
+#undef FIQ_START
#define FIQ_START (NR_IRQS_BANK0 + MAKE_HWIRQ(NR_BANKS - 1, 0))
static const int reg_pending[] __initconst = { 0x00, 0x04, 0x08 };
@@ -255,10 +258,12 @@ static int __init armctrl_of_init(struct
MAKE_HWIRQ(b, i) + NUMBER_IRQS);
BUG_ON(irq <= 0);
irq_set_chip(irq, &armctrl_chip);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ irq_set_probe(irq);
}
}
+#ifndef CONFIG_ARM64
init_FIQ(FIQ_START);
+#endif
return 0;
}
--- a/drivers/mailbox/bcm2835-mailbox.c
+++ b/drivers/mailbox/bcm2835-mailbox.c
@@ -51,12 +51,15 @@
#define MAIL1_WRT (ARM_0_MAIL1 + 0x00)
#define MAIL1_STA (ARM_0_MAIL1 + 0x18)
+/* On ARCH_BCM270x these come through <linux/interrupt.h> (arm_control.h ) */
+#ifndef ARM_MS_FULL
/* Status register: FIFO state. */
#define ARM_MS_FULL BIT(31)
#define ARM_MS_EMPTY BIT(30)
/* Configuration register: Enable interrupts. */
#define ARM_MC_IHAVEDATAIRQEN BIT(0)
+#endif
struct bcm2835_mbox {
void __iomem *regs;
@@ -151,7 +154,7 @@ static int bcm2835_mbox_probe(struct pla
return -ENOMEM;
spin_lock_init(&mbox->lock);
- ret = devm_request_irq(dev, irq_of_parse_and_map(dev->of_node, 0),
+ ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
bcm2835_mbox_irq, 0, dev_name(dev), mbox);
if (ret) {
dev_err(dev, "Failed to register a mailbox IRQ handler: %d\n",
@@ -209,7 +212,18 @@ static struct platform_driver bcm2835_mb
.probe = bcm2835_mbox_probe,
.remove = bcm2835_mbox_remove,
};
-module_platform_driver(bcm2835_mbox_driver);
+
+static int __init bcm2835_mbox_init(void)
+{
+ return platform_driver_register(&bcm2835_mbox_driver);
+}
+arch_initcall(bcm2835_mbox_init);
+
+static void __init bcm2835_mbox_exit(void)
+{
+ platform_driver_unregister(&bcm2835_mbox_driver);
+}
+module_exit(bcm2835_mbox_exit);
MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
MODULE_DESCRIPTION("BCM2835 mailbox IPC driver");
|
