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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* ocp.h
*
* (c) Benjamin Herrenschmidt (benh@kernel.crashing.org)
* Mipsys - France
*
* Derived from work (c) Armin Kuster akuster@pacbell.net
*
* Additional support and port to 2.6 LDM/sysfs by
* Matt Porter <mporter@kernel.crashing.org>
* Copyright 2003-2004 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* TODO: - Add get/put interface & fixup locking to provide same API for
* 2.4 and 2.5
* - Rework PM callbacks
*/
#ifdef __KERNEL__
#ifndef __OCP_H__
#define __OCP_H__
#include <linux/init.h>
#include <linux/list.h>
#include <linux/config.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/device.h>
#include <asm/mmu.h>
#include <asm/ocp_ids.h>
#include <asm/rwsem.h>
#include <asm/semaphore.h>
#ifdef CONFIG_PPC_OCP
#define OCP_MAX_IRQS 7
#define MAX_EMACS 4
#define OCP_IRQ_NA -1 /* used when ocp device does not have an irq */
#define OCP_IRQ_MUL -2 /* used for ocp devices with multiply irqs */
#define OCP_NULL_TYPE -1 /* used to mark end of list */
#define OCP_CPM_NA 0 /* No Clock or Power Management avaliable */
#define OCP_PADDR_NA 0 /* No MMIO registers */
#define OCP_ANY_ID (~0)
#define OCP_ANY_INDEX -1
extern struct list_head ocp_devices;
extern struct rw_semaphore ocp_devices_sem;
struct ocp_device_id {
unsigned int vendor, function; /* Vendor and function ID or OCP_ANY_ID */
unsigned long driver_data; /* Data private to the driver */
};
/*
* Static definition of an OCP device.
*
* @vendor: Vendor code. It is _STRONGLY_ discouraged to use
* the vendor code as a way to match a unique device,
* though I kept that possibility open, you should
* really define different function codes for different
* device types
* @function: This is the function code for this device.
* @index: This index is used for mapping the Nth function of a
* given core. This is typically used for cross-driver
* matching, like looking for a given MAL or ZMII from
* an EMAC or for getting to the proper set of DCRs.
* Indices are no longer magically calculated based on
* structure ordering, they have to be actually coded
* into the ocp_def to avoid any possible confusion
* I _STRONGLY_ (again ? wow !) encourage anybody relying
* on index mapping to encode the "target" index in an
* associated structure pointed to by "additions", see
* how it's done for the EMAC driver.
* @paddr: Device physical address (may not mean anything...)
* @irq: Interrupt line for this device (TODO: think about making
* an array with this)
* @pm: Currently, contains the bitmask in CPMFR DCR for the device
* @additions: Optionally points to a function specific structure
* providing additional informations for a given device
* instance. It's currently used by the EMAC driver for MAL
* channel & ZMII port mapping among others.
* @show: Optionally points to a function specific structure
* providing a sysfs show routine for additions fields.
*/
struct ocp_def {
unsigned int vendor;
unsigned int function;
int index;
phys_addr_t paddr;
int irq;
unsigned long pm;
void *additions;
void (*show)(struct device *);
};
/* Struct for a given device instance */
struct ocp_device {
struct list_head link;
char name[80]; /* device name */
struct ocp_def *def; /* device definition */
void *drvdata; /* driver data for this device */
struct ocp_driver *driver;
u32 current_state; /* Current operating state. In ACPI-speak,
this is D0-D3, D0 being fully functional,
and D3 being off. */
struct device dev;
};
struct ocp_driver {
struct list_head node;
char *name;
const struct ocp_device_id *id_table; /* NULL if wants all devices */
int (*probe) (struct ocp_device *dev); /* New device inserted */
void (*remove) (struct ocp_device *dev); /* Device removed (NULL if not a hot-plug capable driver) */
int (*suspend) (struct ocp_device *dev, pm_message_t state); /* Device suspended */
int (*resume) (struct ocp_device *dev); /* Device woken up */
struct device_driver driver;
};
#define to_ocp_dev(n) container_of(n, struct ocp_device, dev)
#define to_ocp_drv(n) container_of(n, struct ocp_driver, driver)
/* Similar to the helpers above, these manipulate per-ocp_dev
* driver-specific data. Currently stored as ocp_dev::ocpdev,
* a void pointer, but it is not present on older kernels.
*/
static inline void *
ocp_get_drvdata(struct ocp_device *pdev)
{
return pdev->drvdata;
}
static inline void
ocp_set_drvdata(struct ocp_device *pdev, void *data)
{
pdev->drvdata = data;
}
#if defined (CONFIG_PM)
/*
* This is right for the IBM 405 and 440 but will need to be
* generalized if the OCP stuff gets used on other processors.
*/
static inline void
ocp_force_power_off(struct ocp_device *odev)
{
mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) | odev->def->pm);
}
static inline void
ocp_force_power_on(struct ocp_device *odev)
{
mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) & ~odev->def->pm);
}
#else
#define ocp_force_power_off(x) (void)(x)
#define ocp_force_power_on(x) (void)(x)
#endif
/* Register/Unregister an OCP driver */
extern int ocp_register_driver(struct ocp_driver *drv);
extern void ocp_unregister_driver(struct ocp_driver *drv);
/* Build list of devices */
extern int ocp_early_init(void) __init;
/* Find a device by index */
extern struct ocp_device *ocp_find_device(unsigned int vendor, unsigned int function, int index);
/* Get a def by index */
extern struct ocp_def *ocp_get_one_device(unsigned int vendor, unsigned int function, int index);
/* Add a device by index */
extern int ocp_add_one_device(struct ocp_def *def);
/* Remove a device by index */
extern int ocp_remove_one_device(unsigned int vendor, unsigned int function, int index);
/* Iterate over devices and execute a routine */
extern void ocp_for_each_device(void(*callback)(struct ocp_device *, void *arg), void *arg);
/* Sysfs support */
#define OCP_SYSFS_ADDTL(type, format, name, field) \
static ssize_t \
show_##name##_##field(struct device *dev, char *buf) \
{ \
struct ocp_device *odev = to_ocp_dev(dev); \
type *add = odev->def->additions; \
\
return sprintf(buf, format, add->field); \
} \
static DEVICE_ATTR(name##_##field, S_IRUGO, show_##name##_##field, NULL);
#ifdef CONFIG_IBM_OCP
#include <asm/ibm_ocp.h>
#endif
#ifdef CONFIG_FSL_OCP
#include <asm/fsl_ocp.h>
#endif
#endif /* CONFIG_PPC_OCP */
#endif /* __OCP_H__ */
#endif /* __KERNEL__ */
|
