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Diffstat (limited to 'include/asm-ppc/ocp.h')
| -rw-r--r-- | include/asm-ppc/ocp.h | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/include/asm-ppc/ocp.h b/include/asm-ppc/ocp.h new file mode 100644 index 00000000000..5ea44cabfaa --- /dev/null +++ b/include/asm-ppc/ocp.h @@ -0,0 +1,211 @@ +/* + * 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, u32 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__ */ |