4 * (c) Benjamin Herrenschmidt (benh@kernel.crashing.org)
7 * Derived from work (c) Armin Kuster akuster@pacbell.net
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.
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.
18 * TODO: - Add get/put interface & fixup locking to provide same API for
20 * - Rework PM callbacks
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/device.h>
30 #include <linux/rwsem.h>
33 #include <asm/ocp_ids.h>
37 #define OCP_MAX_IRQS 7
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 */
45 #define OCP_ANY_ID (~0)
46 #define OCP_ANY_INDEX -1
48 extern struct list_head ocp_devices;
49 extern struct rw_semaphore ocp_devices_sem;
51 struct 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 */
58 * Static definition of an OCP device.
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
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
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.
90 unsigned int function;
96 void (*show)(struct device *);
100 /* Struct for a given device instance */
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,
114 struct list_head node;
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;
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)
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.
132 ocp_get_drvdata(struct ocp_device *pdev)
134 return pdev->drvdata;
138 ocp_set_drvdata(struct ocp_device *pdev, void *data)
140 pdev->drvdata = data;
143 #if defined (CONFIG_PM)
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.
149 ocp_force_power_off(struct ocp_device *odev)
151 mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) | odev->def->pm);
155 ocp_force_power_on(struct ocp_device *odev)
157 mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) & ~odev->def->pm);
160 #define ocp_force_power_off(x) (void)(x)
161 #define ocp_force_power_on(x) (void)(x)
164 /* Register/Unregister an OCP driver */
165 extern int ocp_register_driver(struct ocp_driver *drv);
166 extern void ocp_unregister_driver(struct ocp_driver *drv);
168 /* Build list of devices */
169 extern int ocp_early_init(void) __init;
171 /* Find a device by index */
172 extern struct ocp_device *ocp_find_device(unsigned int vendor, unsigned int function, int index);
174 /* Get a def by index */
175 extern struct ocp_def *ocp_get_one_device(unsigned int vendor, unsigned int function, int index);
177 /* Add a device by index */
178 extern int ocp_add_one_device(struct ocp_def *def);
180 /* Remove a device by index */
181 extern int ocp_remove_one_device(unsigned int vendor, unsigned int function, int index);
183 /* Iterate over devices and execute a routine */
184 extern void ocp_for_each_device(void(*callback)(struct ocp_device *, void *arg), void *arg);
187 #define OCP_SYSFS_ADDTL(type, format, name, field) \
189 show_##name##_##field(struct device *dev, struct device_attribute *attr, char *buf) \
191 struct ocp_device *odev = to_ocp_dev(dev); \
192 type *add = odev->def->additions; \
194 return sprintf(buf, format, add->field); \
196 static DEVICE_ATTR(name##_##field, S_IRUGO, show_##name##_##field, NULL);
198 #ifdef CONFIG_IBM_OCP
199 #include <asm/ibm_ocp.h>
202 #endif /* CONFIG_PPC_OCP */
203 #endif /* __OCP_H__ */
204 #endif /* __KERNEL__ */