1 files changed, 213 insertions, 0 deletions

diff --git a/include/linux/ipack.h b/include/linux/ipack.h
new file mode 100644
index 000000000000..7a0a3085ab5b
--- /dev/null
+++ b/include/linux/ipack.h
@@ -0,0 +1,213 @@
+/*
+ * Industry-pack bus.
+ *
+ * Copyright (C) 2011-2012 CERN (www.cern.ch)
+ * Author: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
+ *
+ * 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; version 2 of the License.
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+
+#define IPACK_IDPROM_OFFSET_I                   0x01
+#define IPACK_IDPROM_OFFSET_P                   0x03
+#define IPACK_IDPROM_OFFSET_A                   0x05
+#define IPACK_IDPROM_OFFSET_C                   0x07
+#define IPACK_IDPROM_OFFSET_MANUFACTURER_ID     0x09
+#define IPACK_IDPROM_OFFSET_MODEL               0x0B
+#define IPACK_IDPROM_OFFSET_REVISION            0x0D
+#define IPACK_IDPROM_OFFSET_RESERVED            0x0F
+#define IPACK_IDPROM_OFFSET_DRIVER_ID_L         0x11
+#define IPACK_IDPROM_OFFSET_DRIVER_ID_H         0x13
+#define IPACK_IDPROM_OFFSET_NUM_BYTES           0x15
+#define IPACK_IDPROM_OFFSET_CRC                 0x17
+
+struct ipack_bus_ops;
+struct ipack_driver;
+
+enum ipack_space {
+        IPACK_IO_SPACE    = 0,
+        IPACK_ID_SPACE,
+        IPACK_INT_SPACE,
+        IPACK_MEM8_SPACE,
+        IPACK_MEM16_SPACE,
+        /* Dummy for counting the number of entries.  Must remain the last
+         * entry */
+        IPACK_SPACE_COUNT,
+};
+
+/**
+ */
+struct ipack_region {
+        phys_addr_t start;
+        size_t      size;
+};
+
+/**
+ *      struct ipack_device
+ *
+ *      @slot: Slot where the device is plugged in the carrier board
+ *      @bus: ipack_bus_device where the device is plugged to.
+ *      @id_space: Virtual address to ID space.
+ *      @io_space: Virtual address to IO space.
+ *      @mem_space: Virtual address to MEM space.
+ *      @dev: device in kernel representation.
+ *
+ * Warning: Direct access to mapped memory is possible but the endianness
+ * is not the same with PCI carrier or VME carrier. The endianness is managed
+ * by the carrier board throught bus->ops.
+ */
+struct ipack_device {
+        unsigned int slot;
+        struct ipack_bus_device *bus;
+        struct device dev;
+        void (*release) (struct ipack_device *dev);
+        struct ipack_region      region[IPACK_SPACE_COUNT];
+        u8                      *id;
+        size_t                   id_avail;
+        u32                      id_vendor;
+        u32                      id_device;
+        u8                       id_format;
+        unsigned int             id_crc_correct:1;
+        unsigned int             speed_8mhz:1;
+        unsigned int             speed_32mhz:1;
+};
+
+/**
+ * struct ipack_driver_ops -- Callbacks to IPack device driver
+ *
+ * @probe:  Probe function
+ * @remove: Prepare imminent removal of the device.  Services provided by the
+ *          device should be revoked.
+ */
+
+struct ipack_driver_ops {
+        int (*probe) (struct ipack_device *dev);
+        void (*remove) (struct ipack_device *dev);
+};
+
+/**
+ * struct ipack_driver -- Specific data to each ipack device driver
+ *
+ * @driver: Device driver kernel representation
+ * @ops:    Callbacks provided by the IPack device driver
+ */
+struct ipack_driver {
+        struct device_driver driver;
+        const struct ipack_device_id *id_table;
+        const struct ipack_driver_ops *ops;
+};
+
+/**
+ *      struct ipack_bus_ops - available operations on a bridge module
+ *
+ *      @map_space: map IP address space
+ *      @unmap_space: unmap IP address space
+ *      @request_irq: request IRQ
+ *      @free_irq: free IRQ
+ *      @get_clockrate: Returns the clockrate the carrier is currently
+ *              communicating with the device at.
+ *      @set_clockrate: Sets the clock-rate for carrier / module communication.
+ *              Should return -EINVAL if the requested speed is not supported.
+ *      @get_error: Returns the error state for the slot the device is attached
+ *              to.
+ *      @get_timeout: Returns 1 if the communication with the device has
+ *              previously timed out.
+ *      @reset_timeout: Resets the state returned by get_timeout.
+ */
+struct ipack_bus_ops {
+        int (*request_irq) (struct ipack_device *dev,
+                            irqreturn_t (*handler)(void *), void *arg);
+        int (*free_irq) (struct ipack_device *dev);
+        int (*get_clockrate) (struct ipack_device *dev);
+        int (*set_clockrate) (struct ipack_device *dev, int mherz);
+        int (*get_error) (struct ipack_device *dev);
+        int (*get_timeout) (struct ipack_device *dev);
+        int (*reset_timeout) (struct ipack_device *dev);
+};
+
+/**
+ *      struct ipack_bus_device
+ *
+ *      @dev: pointer to carrier device
+ *      @slots: number of slots available
+ *      @bus_nr: ipack bus number
+ *      @ops: bus operations for the mezzanine drivers
+ */
+struct ipack_bus_device {
+        struct device *parent;
+        int slots;
+        int bus_nr;
+        const struct ipack_bus_ops *ops;
+};
+
+/**
+ *      ipack_bus_register -- register a new ipack bus
+ *
+ * @parent: pointer to the parent device, if any.
+ * @slots: number of slots available in the bus device.
+ * @ops: bus operations for the mezzanine drivers.
+ *
+ * The carrier board device should call this function to register itself as
+ * available bus device in ipack.
+ */
+struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
+                                            const struct ipack_bus_ops *ops);
+
+/**
+ *      ipack_bus_unregister -- unregister an ipack bus
+ */
+int ipack_bus_unregister(struct ipack_bus_device *bus);
+
+/**
+ * ipack_driver_register -- Register a new ipack device driver
+ *
+ * Called by a ipack driver to register itself as a driver
+ * that can manage ipack devices.
+ */
+int ipack_driver_register(struct ipack_driver *edrv, struct module *owner,
+                          const char *name);
+void ipack_driver_unregister(struct ipack_driver *edrv);
+
+/**
+ *      ipack_device_register -- register an IPack device with the kernel
+ *      @dev: the new device to register.
+ *
+ *      Register a new IPack device ("module" in IndustryPack jargon). The call
+ *      is done by the carrier driver.  The carrier should populate the fields
+ *      bus and slot as well as the region array of @dev prior to calling this
+ *      function.  The rest of the fields will be allocated and populated
+ *      during registration.
+ *
+ *      Return zero on success or error code on failure.
+ */
+int ipack_device_register(struct ipack_device *dev);
+void ipack_device_unregister(struct ipack_device *dev);
+
+/**
+ * DEFINE_IPACK_DEVICE_TABLE - macro used to describe a IndustryPack table
+ * @_table: device table name
+ *
+ * This macro is used to create a struct ipack_device_id array (a device table)
+ * in a generic manner.
+ */
+#define DEFINE_IPACK_DEVICE_TABLE(_table) \
+        const struct ipack_device_id _table[] __devinitconst
+
+/**
+ * IPACK_DEVICE - macro used to describe a specific IndustryPack device
+ * @_format: the format version (currently either 1 or 2, 8 bit value)
+ * @vend:    the 8 or 24 bit IndustryPack Vendor ID
+ * @dev:     the 8 or 16  bit IndustryPack Device ID
+ *
+ * This macro is used to create a struct ipack_device_id that matches a specific
+ * device.
+ */
+#define IPACK_DEVICE(_format, vend, dev) \
+         .format = (_format), \
+         .vendor = (vend), \
+         .device = (dev)