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diff --git a/include/asm-ppc/ocp.h b/include/asm-ppc/ocp.h
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1/*
2 * ocp.h
3 *
4 * (c) Benjamin Herrenschmidt (benh@kernel.crashing.org)
5 * Mipsys - France
6 *
7 * Derived from work (c) Armin Kuster akuster@pacbell.net
8 *
9 * Additional support and port to 2.6 LDM/sysfs by
10 * Matt Porter <mporter@kernel.crashing.org>
11 * Copyright 2003-2004 MontaVista Software, Inc.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * TODO: - Add get/put interface & fixup locking to provide same API for
19 * 2.4 and 2.5
20 * - Rework PM callbacks
21 */
22
23#ifdef __KERNEL__
24#ifndef __OCP_H__
25#define __OCP_H__
26
27#include <linux/init.h>
28#include <linux/list.h>
29#include <linux/device.h>
30#include <linux/rwsem.h>
31
32#include <asm/mmu.h>
33#include <asm/ocp_ids.h>
34
35#ifdef CONFIG_PPC_OCP
36
37#define OCP_MAX_IRQS 7
38#define MAX_EMACS 4
39#define OCP_IRQ_NA -1 /* used when ocp device does not have an irq */
40#define OCP_IRQ_MUL -2 /* used for ocp devices with multiply irqs */
41#define OCP_NULL_TYPE -1 /* used to mark end of list */
42#define OCP_CPM_NA 0 /* No Clock or Power Management avaliable */
43#define OCP_PADDR_NA 0 /* No MMIO registers */
44
45#define OCP_ANY_ID (~0)
46#define OCP_ANY_INDEX -1
47
48extern struct list_head ocp_devices;
49extern struct rw_semaphore ocp_devices_sem;
50
51struct ocp_device_id {
52 unsigned int vendor, function; /* Vendor and function ID or OCP_ANY_ID */
53 unsigned long driver_data; /* Data private to the driver */
54};
55
56
57/*
58 * Static definition of an OCP device.
59 *
60 * @vendor: Vendor code. It is _STRONGLY_ discouraged to use
61 * the vendor code as a way to match a unique device,
62 * though I kept that possibility open, you should
63 * really define different function codes for different
64 * device types
65 * @function: This is the function code for this device.
66 * @index: This index is used for mapping the Nth function of a
67 * given core. This is typically used for cross-driver
68 * matching, like looking for a given MAL or ZMII from
69 * an EMAC or for getting to the proper set of DCRs.
70 * Indices are no longer magically calculated based on
71 * structure ordering, they have to be actually coded
72 * into the ocp_def to avoid any possible confusion
73 * I _STRONGLY_ (again ? wow !) encourage anybody relying
74 * on index mapping to encode the "target" index in an
75 * associated structure pointed to by "additions", see
76 * how it's done for the EMAC driver.
77 * @paddr: Device physical address (may not mean anything...)
78 * @irq: Interrupt line for this device (TODO: think about making
79 * an array with this)
80 * @pm: Currently, contains the bitmask in CPMFR DCR for the device
81 * @additions: Optionally points to a function specific structure
82 * providing additional informations for a given device
83 * instance. It's currently used by the EMAC driver for MAL
84 * channel & ZMII port mapping among others.
85 * @show: Optionally points to a function specific structure
86 * providing a sysfs show routine for additions fields.
87 */
88struct ocp_def {
89 unsigned int vendor;
90 unsigned int function;
91 int index;
92 phys_addr_t paddr;
93 int irq;
94 unsigned long pm;
95 void *additions;
96 void (*show)(struct device *);
97};
98
99
100/* Struct for a given device instance */
101struct ocp_device {
102 struct list_head link;
103 char name[80]; /* device name */
104 struct ocp_def *def; /* device definition */
105 void *drvdata; /* driver data for this device */
106 struct ocp_driver *driver;
107 u32 current_state; /* Current operating state. In ACPI-speak,
108 this is D0-D3, D0 being fully functional,
109 and D3 being off. */
110 struct device dev;
111};
112
113struct ocp_driver {
114 struct list_head node;
115 char *name;
116 const struct ocp_device_id *id_table; /* NULL if wants all devices */
117 int (*probe) (struct ocp_device *dev); /* New device inserted */
118 void (*remove) (struct ocp_device *dev); /* Device removed (NULL if not a hot-plug capable driver) */
119 int (*suspend) (struct ocp_device *dev, pm_message_t state); /* Device suspended */
120 int (*resume) (struct ocp_device *dev); /* Device woken up */
121 struct device_driver driver;
122};
123
124#define to_ocp_dev(n) container_of(n, struct ocp_device, dev)
125#define to_ocp_drv(n) container_of(n, struct ocp_driver, driver)
126
127/* Similar to the helpers above, these manipulate per-ocp_dev
128 * driver-specific data. Currently stored as ocp_dev::ocpdev,
129 * a void pointer, but it is not present on older kernels.
130 */
131static inline void *
132ocp_get_drvdata(struct ocp_device *pdev)
133{
134 return pdev->drvdata;
135}
136
137static inline void
138ocp_set_drvdata(struct ocp_device *pdev, void *data)
139{
140 pdev->drvdata = data;
141}
142
143#if defined (CONFIG_PM)
144/*
145 * This is right for the IBM 405 and 440 but will need to be
146 * generalized if the OCP stuff gets used on other processors.
147 */
148static inline void
149ocp_force_power_off(struct ocp_device *odev)
150{
151 mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) | odev->def->pm);
152}
153
154static inline void
155ocp_force_power_on(struct ocp_device *odev)
156{
157 mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) & ~odev->def->pm);
158}
159#else
160#define ocp_force_power_off(x) (void)(x)
161#define ocp_force_power_on(x) (void)(x)
162#endif
163
164/* Register/Unregister an OCP driver */
165extern int ocp_register_driver(struct ocp_driver *drv);
166extern void ocp_unregister_driver(struct ocp_driver *drv);
167
168/* Build list of devices */
169extern int ocp_early_init(void) __init;
170
171/* Find a device by index */
172extern struct ocp_device *ocp_find_device(unsigned int vendor, unsigned int function, int index);
173
174/* Get a def by index */
175extern struct ocp_def *ocp_get_one_device(unsigned int vendor, unsigned int function, int index);
176
177/* Add a device by index */
178extern int ocp_add_one_device(struct ocp_def *def);
179
180/* Remove a device by index */
181extern int ocp_remove_one_device(unsigned int vendor, unsigned int function, int index);
182
183/* Iterate over devices and execute a routine */
184extern void ocp_for_each_device(void(*callback)(struct ocp_device *, void *arg), void *arg);
185
186/* Sysfs support */
187#define OCP_SYSFS_ADDTL(type, format, name, field) \
188static ssize_t \
189show_##name##_##field(struct device *dev, struct device_attribute *attr, char *buf) \
190{ \
191 struct ocp_device *odev = to_ocp_dev(dev); \
192 type *add = odev->def->additions; \
193 \
194 return sprintf(buf, format, add->field); \
195} \
196static DEVICE_ATTR(name##_##field, S_IRUGO, show_##name##_##field, NULL);
197
198#ifdef CONFIG_IBM_OCP
199#include <asm/ibm_ocp.h>
200#endif
201
202#endif /* CONFIG_PPC_OCP */
203#endif /* __OCP_H__ */
204#endif /* __KERNEL__ */
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