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authorKevin Strasser <kevin.strasser@linux.intel.com>2013-06-24 00:00:03 -0400
committerSamuel Ortiz <sameo@linux.intel.com>2013-06-24 07:48:22 -0400
commit43620a17945b598e707ef897b3866914f9f9056c (patch)
tree67a26eb8bc13e4a2ca0d393b15051eff747cf9ef /include/linux/mfd/kempld.h
parent4124e6e291a7b1a21ea7c28c8f9899d050103308 (diff)
mfd: Kontron PLD mfd driver
Add core MFD driver for the on-board PLD found on some Kontron embedded modules. The PLD device may provide functions like watchdog, GPIO, UART and I2C bus. The following modules are supported: * COMe-bIP# * COMe-bPC2 (ETXexpress-PC) * COMe-bSC# (ETXexpress-SC T#) * COMe-cCT6 * COMe-cDC2 (microETXexpress-DC) * COMe-cPC2 (microETXexpress-PC) * COMe-mCT10 * ETX-OH Originally-From: Michael Brunner <michael.brunner@kontron.com> Signed-off-by: Kevin Strasser <kevin.strasser@linux.intel.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Darren Hart <dvhart@linux.intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'include/linux/mfd/kempld.h')
-rw-r--r--include/linux/mfd/kempld.h125
1 files changed, 125 insertions, 0 deletions
diff --git a/include/linux/mfd/kempld.h b/include/linux/mfd/kempld.h
new file mode 100644
index 000000000000..b911ef3add03
--- /dev/null
+++ b/include/linux/mfd/kempld.h
@@ -0,0 +1,125 @@
1/*
2 * Kontron PLD driver definitions
3 *
4 * Copyright (c) 2010-2012 Kontron Europe GmbH
5 * Author: Michael Brunner <michael.brunner@kontron.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License 2 as published
9 * by the Free Software Foundation.
10 */
11
12#ifndef _LINUX_MFD_KEMPLD_H_
13#define _LINUX_MFD_KEMPLD_H_
14
15/* kempld register definitions */
16#define KEMPLD_IOINDEX 0xa80
17#define KEMPLD_IODATA 0xa81
18#define KEMPLD_MUTEX_KEY 0x80
19#define KEMPLD_VERSION 0x00
20#define KEMPLD_VERSION_LSB 0x00
21#define KEMPLD_VERSION_MSB 0x01
22#define KEMPLD_VERSION_GET_MINOR(x) (x & 0x1f)
23#define KEMPLD_VERSION_GET_MAJOR(x) ((x >> 5) & 0x1f)
24#define KEMPLD_VERSION_GET_NUMBER(x) ((x >> 10) & 0xf)
25#define KEMPLD_VERSION_GET_TYPE(x) ((x >> 14) & 0x3)
26#define KEMPLD_BUILDNR 0x02
27#define KEMPLD_BUILDNR_LSB 0x02
28#define KEMPLD_BUILDNR_MSB 0x03
29#define KEMPLD_FEATURE 0x04
30#define KEMPLD_FEATURE_LSB 0x04
31#define KEMPLD_FEATURE_MSB 0x05
32#define KEMPLD_FEATURE_BIT_I2C (1 << 0)
33#define KEMPLD_FEATURE_BIT_WATCHDOG (1 << 1)
34#define KEMPLD_FEATURE_BIT_GPIO (1 << 2)
35#define KEMPLD_FEATURE_MASK_UART (7 << 3)
36#define KEMPLD_FEATURE_BIT_NMI (1 << 8)
37#define KEMPLD_FEATURE_BIT_SMI (1 << 9)
38#define KEMPLD_FEATURE_BIT_SCI (1 << 10)
39#define KEMPLD_SPEC 0x06
40#define KEMPLD_SPEC_GET_MINOR(x) (x & 0x0f)
41#define KEMPLD_SPEC_GET_MAJOR(x) ((x >> 4) & 0x0f)
42#define KEMPLD_IRQ_GPIO 0x35
43#define KEMPLD_IRQ_I2C 0x36
44#define KEMPLD_CFG 0x37
45#define KEMPLD_CFG_GPIO_I2C_MUX (1 << 0)
46#define KEMPLD_CFG_BIOS_WP (1 << 7)
47
48#define KEMPLD_CLK 33333333
49
50#define KEMPLD_TYPE_RELEASE 0x0
51#define KEMPLD_TYPE_DEBUG 0x1
52#define KEMPLD_TYPE_CUSTOM 0x2
53
54/**
55 * struct kempld_info - PLD device information structure
56 * @major: PLD major revision
57 * @minor: PLD minor revision
58 * @buildnr: PLD build number
59 * @number: PLD board specific index
60 * @type: PLD type
61 * @spec_major: PLD FW specification major revision
62 * @spec_minor: PLD FW specification minor revision
63 */
64struct kempld_info {
65 unsigned int major;
66 unsigned int minor;
67 unsigned int buildnr;
68 unsigned int number;
69 unsigned int type;
70 unsigned int spec_major;
71 unsigned int spec_minor;
72};
73
74/**
75 * struct kempld_device_data - Internal representation of the PLD device
76 * @io_base: Pointer to the IO memory
77 * @io_index: Pointer to the IO index register
78 * @io_data: Pointer to the IO data register
79 * @pld_clock: PLD clock frequency
80 * @feature_mask: PLD feature mask
81 * @dev: Pointer to kernel device structure
82 * @info: KEMPLD info structure
83 * @lock: PLD mutex
84 */
85struct kempld_device_data {
86 void __iomem *io_base;
87 void __iomem *io_index;
88 void __iomem *io_data;
89 u32 pld_clock;
90 u32 feature_mask;
91 struct device *dev;
92 struct kempld_info info;
93 struct mutex lock;
94};
95
96/**
97 * struct kempld_platform_data - PLD hardware configuration structure
98 * @pld_clock: PLD clock frequency
99 * @gpio_base GPIO base pin number
100 * @ioresource: IO addresses of the PLD
101 * @get_mutex: PLD specific get_mutex callback
102 * @release_mutex: PLD specific release_mutex callback
103 * @get_info: PLD specific get_info callback
104 * @register_cells: PLD specific register_cells callback
105 */
106struct kempld_platform_data {
107 u32 pld_clock;
108 int gpio_base;
109 struct resource *ioresource;
110 void (*get_hardware_mutex) (struct kempld_device_data *);
111 void (*release_hardware_mutex) (struct kempld_device_data *);
112 int (*get_info) (struct kempld_device_data *);
113 int (*register_cells) (struct kempld_device_data *);
114};
115
116extern void kempld_get_mutex(struct kempld_device_data *pld);
117extern void kempld_release_mutex(struct kempld_device_data *pld);
118extern u8 kempld_read8(struct kempld_device_data *pld, u8 index);
119extern void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data);
120extern u16 kempld_read16(struct kempld_device_data *pld, u8 index);
121extern void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data);
122extern u32 kempld_read32(struct kempld_device_data *pld, u8 index);
123extern void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data);
124
125#endif /* _LINUX_MFD_KEMPLD_H_ */
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-01 22:15:52 -0500