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authorJamie Iles <jamie@jamieiles.com>2011-07-25 12:36:42 -0400
committerJamie Iles <jamie@jamieiles.com>2011-09-26 11:11:56 -0400
commitaf75655c066621352c419646ec0775e9523dc720 (patch)
treeae3895ab4f9d8ce7823f4ef4dcbdbb8f838f3073 /arch/arm/mach-picoxcell
parentc6a389f123b9f68d605bb7e0f9b32ec1e3e14132 (diff)
picoxcell: support for Picochip picoxcell devices
picoXcell is a family of femtocell devices with an ARM application processor and picoArray DSP processor array. This patch adds support for picoXcell boards to be booted using the device tree registering the VIC's, UART's and timers. v3: - fixup vic compatible string in binding v2: - cleanup empty mach headers - convert to of_platform_populate() - simplify uncompress.h - split vic node into 2 devices - add missing __initconst attributes Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Diffstat (limited to 'arch/arm/mach-picoxcell')
-rw-r--r--arch/arm/mach-picoxcell/Makefile3
-rw-r--r--arch/arm/mach-picoxcell/Makefile.boot1
-rw-r--r--arch/arm/mach-picoxcell/common.c55
-rw-r--r--arch/arm/mach-picoxcell/common.h18
-rw-r--r--arch/arm/mach-picoxcell/include/mach/debug-macro.S35
-rw-r--r--arch/arm/mach-picoxcell/include/mach/entry-macro.S19
-rw-r--r--arch/arm/mach-picoxcell/include/mach/gpio.h1
-rw-r--r--arch/arm/mach-picoxcell/include/mach/hardware.h21
-rw-r--r--arch/arm/mach-picoxcell/include/mach/io.h29
-rw-r--r--arch/arm/mach-picoxcell/include/mach/irqs.h25
-rw-r--r--arch/arm/mach-picoxcell/include/mach/map.h25
-rw-r--r--arch/arm/mach-picoxcell/include/mach/memory.h1
-rw-r--r--arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h25
-rw-r--r--arch/arm/mach-picoxcell/include/mach/system.h31
-rw-r--r--arch/arm/mach-picoxcell/include/mach/timex.h25
-rw-r--r--arch/arm/mach-picoxcell/include/mach/uncompress.h21
-rw-r--r--arch/arm/mach-picoxcell/include/mach/vmalloc.h18
-rw-r--r--arch/arm/mach-picoxcell/io.c56
-rw-r--r--arch/arm/mach-picoxcell/time.c132
19 files changed, 541 insertions, 0 deletions
diff --git a/arch/arm/mach-picoxcell/Makefile b/arch/arm/mach-picoxcell/Makefile
new file mode 100644
index 000000000000..c550b6363488
--- /dev/null
+++ b/arch/arm/mach-picoxcell/Makefile
@@ -0,0 +1,3 @@
1obj-y := common.o
2obj-y += time.o
3obj-y += io.o
diff --git a/arch/arm/mach-picoxcell/Makefile.boot b/arch/arm/mach-picoxcell/Makefile.boot
new file mode 100644
index 000000000000..b3271754e9fd
--- /dev/null
+++ b/arch/arm/mach-picoxcell/Makefile.boot
@@ -0,0 +1 @@
zreladdr-y := 0x00008000
diff --git a/arch/arm/mach-picoxcell/common.c b/arch/arm/mach-picoxcell/common.c
new file mode 100644
index 000000000000..34d08347be5f
--- /dev/null
+++ b/arch/arm/mach-picoxcell/common.c
@@ -0,0 +1,55 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * All enquiries to support@picochip.com
9 */
10#include <linux/irq.h>
11#include <linux/irqdomain.h>
12#include <linux/of.h>
13#include <linux/of_address.h>
14#include <linux/of_platform.h>
15
16#include <asm/mach/arch.h>
17#include <asm/hardware/vic.h>
18
19#include <mach/map.h>
20#include <mach/picoxcell_soc.h>
21
22#include "common.h"
23
24static void __init picoxcell_init_machine(void)
25{
26 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
27}
28
29static const char *picoxcell_dt_match[] = {
30 "picochip,pc3x2",
31 "picochip,pc3x3",
32 NULL
33};
34
35static const struct of_device_id vic_of_match[] __initconst = {
36 { .compatible = "arm,pl192-vic" },
37 { /* Sentinel */ }
38};
39
40static void __init picoxcell_init_irq(void)
41{
42 vic_init(IO_ADDRESS(PICOXCELL_VIC0_BASE), 0, ~0, 0);
43 vic_init(IO_ADDRESS(PICOXCELL_VIC1_BASE), 32, ~0, 0);
44 irq_domain_generate_simple(vic_of_match, PICOXCELL_VIC0_BASE, 0);
45 irq_domain_generate_simple(vic_of_match, PICOXCELL_VIC1_BASE, 32);
46}
47
48DT_MACHINE_START(PICOXCELL, "Picochip picoXcell")
49 .map_io = picoxcell_map_io,
50 .nr_irqs = ARCH_NR_IRQS,
51 .init_irq = picoxcell_init_irq,
52 .timer = &picoxcell_timer,
53 .init_machine = picoxcell_init_machine,
54 .dt_compat = picoxcell_dt_match,
55MACHINE_END
diff --git a/arch/arm/mach-picoxcell/common.h b/arch/arm/mach-picoxcell/common.h
new file mode 100644
index 000000000000..5263f0fa095c
--- /dev/null
+++ b/arch/arm/mach-picoxcell/common.h
@@ -0,0 +1,18 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * All enquiries to support@picochip.com
9 */
10#ifndef __PICOXCELL_COMMON_H__
11#define __PICOXCELL_COMMON_H__
12
13#include <asm/mach/time.h>
14
15extern struct sys_timer picoxcell_timer;
16extern void picoxcell_map_io(void);
17
18#endif /* __PICOXCELL_COMMON_H__ */
diff --git a/arch/arm/mach-picoxcell/include/mach/debug-macro.S b/arch/arm/mach-picoxcell/include/mach/debug-macro.S
new file mode 100644
index 000000000000..8f2c234ed9d9
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/debug-macro.S
@@ -0,0 +1,35 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
9 * accesses to the 8250.
10 */
11#include <linux/serial_reg.h>
12#include <mach/hardware.h>
13#include <mach/map.h>
14
15#define UART_SHIFT 2
16
17 .macro addruart, rp, rv
18 ldr \rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE)
19 ldr \rp, =PICOXCELL_UART1_BASE
20 .endm
21
22 .macro senduart,rd,rx
23 str \rd, [\rx, #UART_TX << UART_SHIFT]
24 .endm
25
26 .macro busyuart,rd,rx
271002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
28 and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
29 teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
30 bne 1002b
31 .endm
32
33 /* The UART's don't have any flow control IO's wired up. */
34 .macro waituart,rd,rx
35 .endm
diff --git a/arch/arm/mach-picoxcell/include/mach/entry-macro.S b/arch/arm/mach-picoxcell/include/mach/entry-macro.S
new file mode 100644
index 000000000000..a6b09f75d9df
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/entry-macro.S
@@ -0,0 +1,19 @@
1/*
2 * entry-macro.S
3 *
4 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
5 *
6 * Low-level IRQ helper macros for picoXcell platforms
7 *
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12#include <mach/hardware.h>
13#include <mach/irqs.h>
14#include <mach/map.h>
15
16#define VA_VIC0 IO_ADDRESS(PICOXCELL_VIC0_BASE)
17#define VA_VIC1 IO_ADDRESS(PICOXCELL_VIC1_BASE)
18
19#include <asm/entry-macro-vic2.S>
diff --git a/arch/arm/mach-picoxcell/include/mach/gpio.h b/arch/arm/mach-picoxcell/include/mach/gpio.h
new file mode 100644
index 000000000000..40a8c178f10d
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/gpio.h
@@ -0,0 +1 @@
/* empty */
diff --git a/arch/arm/mach-picoxcell/include/mach/hardware.h b/arch/arm/mach-picoxcell/include/mach/hardware.h
new file mode 100644
index 000000000000..70ff58192ec9
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/hardware.h
@@ -0,0 +1,21 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This file contains the hardware definitions of the picoXcell SoC devices.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16#ifndef __ASM_ARCH_HARDWARE_H
17#define __ASM_ARCH_HARDWARE_H
18
19#include <mach/picoxcell_soc.h>
20
21#endif
diff --git a/arch/arm/mach-picoxcell/include/mach/io.h b/arch/arm/mach-picoxcell/include/mach/io.h
new file mode 100644
index 000000000000..a863b0f6eeec
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/io.h
@@ -0,0 +1,29 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14#ifndef __ASM_ARM_ARCH_IO_H
15#define __ASM_ARM_ARCH_IO_H
16
17/* No ioports, but needed for driver compatibility. */
18#define __io(a) __typesafe_io(a)
19/* No PCI possible on picoxcell. */
20#define __mem_pci(a) (a)
21
22#define __arch_ioremap picoxcell_ioremap
23#define __arch_iounmap picoxcell_iounmap
24
25extern void __iomem *picoxcell_ioremap(unsigned long phys, size_t size,
26 unsigned int type);
27extern void picoxcell_iounmap(volatile void __iomem *addr);
28
29#endif /* __ASM_ARM_ARCH_IO_H */
diff --git a/arch/arm/mach-picoxcell/include/mach/irqs.h b/arch/arm/mach-picoxcell/include/mach/irqs.h
new file mode 100644
index 000000000000..4d13ed970919
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/irqs.h
@@ -0,0 +1,25 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This file contains the hardware definitions of the picoXcell SoC devices.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16#ifndef __MACH_IRQS_H
17#define __MACH_IRQS_H
18
19#define ARCH_NR_IRQS 64
20#define NR_IRQS (128 + ARCH_NR_IRQS)
21
22#define IRQ_VIC0_BASE 0
23#define IRQ_VIC1_BASE 32
24
25#endif /* __MACH_IRQS_H */
diff --git a/arch/arm/mach-picoxcell/include/mach/map.h b/arch/arm/mach-picoxcell/include/mach/map.h
new file mode 100644
index 000000000000..c06afad218bb
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/map.h
@@ -0,0 +1,25 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14#ifndef __PICOXCELL_MAP_H__
15#define __PICOXCELL_MAP_H__
16
17#define PHYS_TO_IO(x) (((x) & 0x00ffffff) | 0xfe000000)
18
19#ifdef __ASSEMBLY__
20#define IO_ADDRESS(x) PHYS_TO_IO((x))
21#else
22#define IO_ADDRESS(x) (void __iomem __force *)(PHYS_TO_IO((x)))
23#endif
24
25#endif /* __PICOXCELL_MAP_H__ */
diff --git a/arch/arm/mach-picoxcell/include/mach/memory.h b/arch/arm/mach-picoxcell/include/mach/memory.h
new file mode 100644
index 000000000000..40a8c178f10d
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/memory.h
@@ -0,0 +1 @@
/* empty */
diff --git a/arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h b/arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h
new file mode 100644
index 000000000000..5566fc88ddbc
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/picoxcell_soc.h
@@ -0,0 +1,25 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This file contains the hardware definitions of the picoXcell SoC devices.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16#ifndef __PICOXCELL_SOC_H__
17#define __PICOXCELL_SOC_H__
18
19#define PICOXCELL_UART1_BASE 0x80230000
20#define PICOXCELL_PERIPH_BASE 0x80000000
21#define PICOXCELL_PERIPH_LENGTH SZ_4M
22#define PICOXCELL_VIC0_BASE 0x80060000
23#define PICOXCELL_VIC1_BASE 0x80064000
24
25#endif /* __PICOXCELL_SOC_H__ */
diff --git a/arch/arm/mach-picoxcell/include/mach/system.h b/arch/arm/mach-picoxcell/include/mach/system.h
new file mode 100644
index 000000000000..67c589b0c1bc
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/system.h
@@ -0,0 +1,31 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14#ifndef __ASM_ARCH_SYSTEM_H
15#define __ASM_ARCH_SYSTEM_H
16
17static inline void arch_idle(void)
18{
19 /*
20 * This should do all the clock switching and wait for interrupt
21 * tricks.
22 */
23 cpu_do_idle();
24}
25
26static inline void arch_reset(int mode, const char *cmd)
27{
28 /* Watchdog reset to go here. */
29}
30
31#endif /* __ASM_ARCH_SYSTEM_H */
diff --git a/arch/arm/mach-picoxcell/include/mach/timex.h b/arch/arm/mach-picoxcell/include/mach/timex.h
new file mode 100644
index 000000000000..6c540a69f405
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/timex.h
@@ -0,0 +1,25 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18#ifndef __TIMEX_H__
19#define __TIMEX_H__
20
21/* Bogus value to allow the kernel to compile. */
22#define CLOCK_TICK_RATE 1000000
23
24#endif /* __TIMEX_H__ */
25
diff --git a/arch/arm/mach-picoxcell/include/mach/uncompress.h b/arch/arm/mach-picoxcell/include/mach/uncompress.h
new file mode 100644
index 000000000000..b60b19d1d739
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/uncompress.h
@@ -0,0 +1,21 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18#define putc(c)
19#define flush()
20#define arch_decomp_setup()
21#define arch_decomp_wdog()
diff --git a/arch/arm/mach-picoxcell/include/mach/vmalloc.h b/arch/arm/mach-picoxcell/include/mach/vmalloc.h
new file mode 100644
index 000000000000..62559e30888a
--- /dev/null
+++ b/arch/arm/mach-picoxcell/include/mach/vmalloc.h
@@ -0,0 +1,18 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18#define VMALLOC_END 0xFE000000UL
diff --git a/arch/arm/mach-picoxcell/io.c b/arch/arm/mach-picoxcell/io.c
new file mode 100644
index 000000000000..935a2fae62e6
--- /dev/null
+++ b/arch/arm/mach-picoxcell/io.c
@@ -0,0 +1,56 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * All enquiries to support@picochip.com
9 */
10#include <linux/io.h>
11#include <linux/mm.h>
12#include <linux/module.h>
13#include <linux/of.h>
14
15#include <asm/mach/map.h>
16
17#include <mach/map.h>
18#include <mach/picoxcell_soc.h>
19
20#include "common.h"
21
22void __init picoxcell_map_io(void)
23{
24 struct map_desc io_map = {
25 .virtual = PHYS_TO_IO(PICOXCELL_PERIPH_BASE),
26 .pfn = __phys_to_pfn(PICOXCELL_PERIPH_BASE),
27 .length = PICOXCELL_PERIPH_LENGTH,
28 .type = MT_DEVICE,
29 };
30
31 iotable_init(&io_map, 1);
32}
33
34void __iomem *picoxcell_ioremap(unsigned long p, size_t size,
35 unsigned int type)
36{
37 if (unlikely(size == 0))
38 return NULL;
39
40 if (p >= PICOXCELL_PERIPH_BASE &&
41 p < PICOXCELL_PERIPH_BASE + PICOXCELL_PERIPH_LENGTH)
42 return IO_ADDRESS(p);
43
44 return __arm_ioremap_caller(p, size, type,
45 __builtin_return_address(0));
46}
47EXPORT_SYMBOL_GPL(picoxcell_ioremap);
48
49void picoxcell_iounmap(volatile void __iomem *addr)
50{
51 unsigned long virt = (unsigned long)addr;
52
53 if (virt >= VMALLOC_START && virt < VMALLOC_END)
54 __iounmap(addr);
55}
56EXPORT_SYMBOL_GPL(picoxcell_iounmap);
diff --git a/arch/arm/mach-picoxcell/time.c b/arch/arm/mach-picoxcell/time.c
new file mode 100644
index 000000000000..90a554ff4499
--- /dev/null
+++ b/arch/arm/mach-picoxcell/time.c
@@ -0,0 +1,132 @@
1/*
2 * Copyright (c) 2011 Picochip Ltd., Jamie Iles
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * All enquiries to support@picochip.com
9 */
10#include <linux/dw_apb_timer.h>
11#include <linux/of.h>
12#include <linux/of_address.h>
13#include <linux/of_irq.h>
14#include <linux/sched.h>
15
16#include <asm/mach/time.h>
17#include <asm/sched_clock.h>
18
19#include "common.h"
20
21static void timer_get_base_and_rate(struct device_node *np,
22 void __iomem **base, u32 *rate)
23{
24 *base = of_iomap(np, 0);
25
26 if (!*base)
27 panic("Unable to map regs for %s", np->name);
28
29 if (of_property_read_u32(np, "clock-freq", rate))
30 panic("No clock-freq property for %s", np->name);
31}
32
33static void picoxcell_add_clockevent(struct device_node *event_timer)
34{
35 void __iomem *iobase;
36 struct dw_apb_clock_event_device *ced;
37 u32 irq, rate;
38
39 irq = irq_of_parse_and_map(event_timer, 0);
40 if (irq == NO_IRQ)
41 panic("No IRQ for clock event timer");
42
43 timer_get_base_and_rate(event_timer, &iobase, &rate);
44
45 ced = dw_apb_clockevent_init(0, event_timer->name, 300, iobase, irq,
46 rate);
47 if (!ced)
48 panic("Unable to initialise clockevent device");
49
50 dw_apb_clockevent_register(ced);
51}
52
53static void picoxcell_add_clocksource(struct device_node *source_timer)
54{
55 void __iomem *iobase;
56 struct dw_apb_clocksource *cs;
57 u32 rate;
58
59 timer_get_base_and_rate(source_timer, &iobase, &rate);
60
61 cs = dw_apb_clocksource_init(300, source_timer->name, iobase, rate);
62 if (!cs)
63 panic("Unable to initialise clocksource device");
64
65 dw_apb_clocksource_start(cs);
66 dw_apb_clocksource_register(cs);
67}
68
69static DEFINE_CLOCK_DATA(cd);
70static void __iomem *sched_io_base;
71
72unsigned long long notrace sched_clock(void)
73{
74 cycle_t cyc = sched_io_base ? __raw_readl(sched_io_base) : 0;
75
76 return cyc_to_sched_clock(&cd, cyc, (u32)~0);
77}
78
79static void notrace picoxcell_update_sched_clock(void)
80{
81 cycle_t cyc = sched_io_base ? __raw_readl(sched_io_base) : 0;
82
83 update_sched_clock(&cd, cyc, (u32)~0);
84}
85
86static const struct of_device_id picoxcell_rtc_ids[] __initconst = {
87 { .compatible = "picochip,pc3x2-rtc" },
88 { /* Sentinel */ },
89};
90
91static void picoxcell_init_sched_clock(void)
92{
93 struct device_node *sched_timer;
94 u32 rate;
95
96 sched_timer = of_find_matching_node(NULL, picoxcell_rtc_ids);
97 if (!sched_timer)
98 panic("No RTC for sched clock to use");
99
100 timer_get_base_and_rate(sched_timer, &sched_io_base, &rate);
101 of_node_put(sched_timer);
102
103 init_sched_clock(&cd, picoxcell_update_sched_clock, 32, rate);
104}
105
106static const struct of_device_id picoxcell_timer_ids[] __initconst = {
107 { .compatible = "picochip,pc3x2-timer" },
108 {},
109};
110
111static void __init picoxcell_timer_init(void)
112{
113 struct device_node *event_timer, *source_timer;
114
115 event_timer = of_find_matching_node(NULL, picoxcell_timer_ids);
116 if (!event_timer)
117 panic("No timer for clockevent");
118 picoxcell_add_clockevent(event_timer);
119
120 source_timer = of_find_matching_node(event_timer, picoxcell_timer_ids);
121 if (!source_timer)
122 panic("No timer for clocksource");
123 picoxcell_add_clocksource(source_timer);
124
125 of_node_put(source_timer);
126
127 picoxcell_init_sched_clock();
128}
129
130struct sys_timer picoxcell_timer = {
131 .init = picoxcell_timer_init,
132};
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-17 17:53:35 -0500