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>
32 #include <asm/ocp_ids.h>
33 #include <asm/rwsem.h>
34 #include <asm/semaphore.h>
38 #define OCP_MAX_IRQS 7
40 #define OCP_IRQ_NA -1 /* used when ocp device does not have an irq */
41 #define OCP_IRQ_MUL -2 /* used for ocp devices with multiply irqs */
42 #define OCP_NULL_TYPE -1 /* used to mark end of list */
43 #define OCP_CPM_NA 0 /* No Clock or Power Management avaliable */
44 #define OCP_PADDR_NA 0 /* No MMIO registers */
46 #define OCP_ANY_ID (~0)
47 #define OCP_ANY_INDEX -1
49 extern struct list_head ocp_devices;
50 extern struct rw_semaphore ocp_devices_sem;
52 struct ocp_device_id {
53 unsigned int vendor, function; /* Vendor and function ID or OCP_ANY_ID */
54 unsigned long driver_data; /* Data private to the driver */
59 * Static definition of an OCP device.
61 * @vendor: Vendor code. It is _STRONGLY_ discouraged to use
62 * the vendor code as a way to match a unique device,
63 * though I kept that possibility open, you should
64 * really define different function codes for different
66 * @function: This is the function code for this device.
67 * @index: This index is used for mapping the Nth function of a
68 * given core. This is typically used for cross-driver
69 * matching, like looking for a given MAL or ZMII from
70 * an EMAC or for getting to the proper set of DCRs.
71 * Indices are no longer magically calculated based on
72 * structure ordering, they have to be actually coded
73 * into the ocp_def to avoid any possible confusion
74 * I _STRONGLY_ (again ? wow !) encourage anybody relying
75 * on index mapping to encode the "target" index in an
76 * associated structure pointed to by "additions", see
77 * how it's done for the EMAC driver.
78 * @paddr: Device physical address (may not mean anything...)
79 * @irq: Interrupt line for this device (TODO: think about making
81 * @pm: Currently, contains the bitmask in CPMFR DCR for the device
82 * @additions: Optionally points to a function specific structure
83 * providing additional informations for a given device
84 * instance. It's currently used by the EMAC driver for MAL
85 * channel & ZMII port mapping among others.
86 * @show: Optionally points to a function specific structure
87 * providing a sysfs show routine for additions fields.
91 unsigned int function;
97 void (*show)(struct device *);
101 /* Struct for a given device instance */
103 struct list_head link;
104 char name[80]; /* device name */
105 struct ocp_def *def; /* device definition */
106 void *drvdata; /* driver data for this device */
107 struct ocp_driver *driver;
108 u32 current_state; /* Current operating state. In ACPI-speak,
109 this is D0-D3, D0 being fully functional,
115 struct list_head node;
117 const struct ocp_device_id *id_table; /* NULL if wants all devices */
118 int (*probe) (struct ocp_device *dev); /* New device inserted */
119 void (*remove) (struct ocp_device *dev); /* Device removed (NULL if not a hot-plug capable driver) */
120 int (*suspend) (struct ocp_device *dev, pm_message_t state); /* Device suspended */
121 int (*resume) (struct ocp_device *dev); /* Device woken up */
122 struct device_driver driver;
125 #define to_ocp_dev(n) container_of(n, struct ocp_device, dev)
126 #define to_ocp_drv(n) container_of(n, struct ocp_driver, driver)
128 /* Similar to the helpers above, these manipulate per-ocp_dev
129 * driver-specific data. Currently stored as ocp_dev::ocpdev,
130 * a void pointer, but it is not present on older kernels.
133 ocp_get_drvdata(struct ocp_device *pdev)
135 return pdev->drvdata;
139 ocp_set_drvdata(struct ocp_device *pdev, void *data)
141 pdev->drvdata = data;
144 #if defined (CONFIG_PM)
146 * This is right for the IBM 405 and 440 but will need to be
147 * generalized if the OCP stuff gets used on other processors.
150 ocp_force_power_off(struct ocp_device *odev)
152 mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) | odev->def->pm);
156 ocp_force_power_on(struct ocp_device *odev)
158 mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) & ~odev->def->pm);
161 #define ocp_force_power_off(x) (void)(x)
162 #define ocp_force_power_on(x) (void)(x)
165 /* Register/Unregister an OCP driver */
166 extern int ocp_register_driver(struct ocp_driver *drv);
167 extern void ocp_unregister_driver(struct ocp_driver *drv);
169 /* Build list of devices */
170 extern int ocp_early_init(void) __init;
172 /* Find a device by index */
173 extern struct ocp_device *ocp_find_device(unsigned int vendor, unsigned int function, int index);
175 /* Get a def by index */
176 extern struct ocp_def *ocp_get_one_device(unsigned int vendor, unsigned int function, int index);
178 /* Add a device by index */
179 extern int ocp_add_one_device(struct ocp_def *def);
181 /* Remove a device by index */
182 extern int ocp_remove_one_device(unsigned int vendor, unsigned int function, int index);
184 /* Iterate over devices and execute a routine */
185 extern void ocp_for_each_device(void(*callback)(struct ocp_device *, void *arg), void *arg);
188 #define OCP_SYSFS_ADDTL(type, format, name, field) \
190 show_##name##_##field(struct device *dev, struct device_attribute *attr, char *buf) \
192 struct ocp_device *odev = to_ocp_dev(dev); \
193 type *add = odev->def->additions; \
195 return sprintf(buf, format, add->field); \
197 static DEVICE_ATTR(name##_##field, S_IRUGO, show_##name##_##field, NULL);
199 #ifdef CONFIG_IBM_OCP
200 #include <asm/ibm_ocp.h>
203 #endif /* CONFIG_PPC_OCP */
204 #endif /* __OCP_H__ */
205 #endif /* __KERNEL__ */