4 * Copyright (C) 2011-2012 CERN (www.cern.ch)
5 * Author: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; version 2 of the License.
12 #include <linux/mod_devicetable.h>
13 #include <linux/device.h>
14 #include <linux/interrupt.h>
16 #define IPACK_IDPROM_OFFSET_I 0x01
17 #define IPACK_IDPROM_OFFSET_P 0x03
18 #define IPACK_IDPROM_OFFSET_A 0x05
19 #define IPACK_IDPROM_OFFSET_C 0x07
20 #define IPACK_IDPROM_OFFSET_MANUFACTURER_ID 0x09
21 #define IPACK_IDPROM_OFFSET_MODEL 0x0B
22 #define IPACK_IDPROM_OFFSET_REVISION 0x0D
23 #define IPACK_IDPROM_OFFSET_RESERVED 0x0F
24 #define IPACK_IDPROM_OFFSET_DRIVER_ID_L 0x11
25 #define IPACK_IDPROM_OFFSET_DRIVER_ID_H 0x13
26 #define IPACK_IDPROM_OFFSET_NUM_BYTES 0x15
27 #define IPACK_IDPROM_OFFSET_CRC 0x17
30 * IndustryPack Fromat, Vendor and Device IDs.
33 /* ID section format versions */
34 #define IPACK_ID_VERSION_INVALID 0x00
35 #define IPACK_ID_VERSION_1 0x01
36 #define IPACK_ID_VERSION_2 0x02
38 /* Vendors and devices. Sort key: vendor first, device next. */
39 #define IPACK1_VENDOR_ID_RESERVED1 0x00
40 #define IPACK1_VENDOR_ID_RESERVED2 0xFF
41 #define IPACK1_VENDOR_ID_UNREGISTRED01 0x01
42 #define IPACK1_VENDOR_ID_UNREGISTRED02 0x02
43 #define IPACK1_VENDOR_ID_UNREGISTRED03 0x03
44 #define IPACK1_VENDOR_ID_UNREGISTRED04 0x04
45 #define IPACK1_VENDOR_ID_UNREGISTRED05 0x05
46 #define IPACK1_VENDOR_ID_UNREGISTRED06 0x06
47 #define IPACK1_VENDOR_ID_UNREGISTRED07 0x07
48 #define IPACK1_VENDOR_ID_UNREGISTRED08 0x08
49 #define IPACK1_VENDOR_ID_UNREGISTRED09 0x09
50 #define IPACK1_VENDOR_ID_UNREGISTRED10 0x0A
51 #define IPACK1_VENDOR_ID_UNREGISTRED11 0x0B
52 #define IPACK1_VENDOR_ID_UNREGISTRED12 0x0C
53 #define IPACK1_VENDOR_ID_UNREGISTRED13 0x0D
54 #define IPACK1_VENDOR_ID_UNREGISTRED14 0x0E
55 #define IPACK1_VENDOR_ID_UNREGISTRED15 0x0F
57 #define IPACK1_VENDOR_ID_SBS 0xF0
58 #define IPACK1_DEVICE_ID_SBS_OCTAL_232 0x22
59 #define IPACK1_DEVICE_ID_SBS_OCTAL_422 0x2A
60 #define IPACK1_DEVICE_ID_SBS_OCTAL_485 0x48
71 /* Dummy for counting the number of entries. Must remain the last
86 * @slot: Slot where the device is plugged in the carrier board
87 * @bus: ipack_bus_device where the device is plugged to.
88 * @id_space: Virtual address to ID space.
89 * @io_space: Virtual address to IO space.
90 * @mem_space: Virtual address to MEM space.
91 * @dev: device in kernel representation.
93 * Warning: Direct access to mapped memory is possible but the endianness
94 * is not the same with PCI carrier or VME carrier. The endianness is managed
95 * by the carrier board throught bus->ops.
99 struct ipack_bus_device *bus;
101 void (*release) (struct ipack_device *dev);
102 struct ipack_region region[IPACK_SPACE_COUNT];
108 unsigned int id_crc_correct:1;
109 unsigned int speed_8mhz:1;
110 unsigned int speed_32mhz:1;
114 * struct ipack_driver_ops -- Callbacks to IPack device driver
116 * @probe: Probe function
117 * @remove: Prepare imminent removal of the device. Services provided by the
118 * device should be revoked.
121 struct ipack_driver_ops {
122 int (*probe) (struct ipack_device *dev);
123 void (*remove) (struct ipack_device *dev);
127 * struct ipack_driver -- Specific data to each ipack device driver
129 * @driver: Device driver kernel representation
130 * @ops: Callbacks provided by the IPack device driver
132 struct ipack_driver {
133 struct device_driver driver;
134 const struct ipack_device_id *id_table;
135 const struct ipack_driver_ops *ops;
139 * struct ipack_bus_ops - available operations on a bridge module
141 * @map_space: map IP address space
142 * @unmap_space: unmap IP address space
143 * @request_irq: request IRQ
144 * @free_irq: free IRQ
145 * @get_clockrate: Returns the clockrate the carrier is currently
146 * communicating with the device at.
147 * @set_clockrate: Sets the clock-rate for carrier / module communication.
148 * Should return -EINVAL if the requested speed is not supported.
149 * @get_error: Returns the error state for the slot the device is attached
151 * @get_timeout: Returns 1 if the communication with the device has
152 * previously timed out.
153 * @reset_timeout: Resets the state returned by get_timeout.
155 struct ipack_bus_ops {
156 int (*request_irq) (struct ipack_device *dev,
157 irqreturn_t (*handler)(void *), void *arg);
158 int (*free_irq) (struct ipack_device *dev);
159 int (*get_clockrate) (struct ipack_device *dev);
160 int (*set_clockrate) (struct ipack_device *dev, int mherz);
161 int (*get_error) (struct ipack_device *dev);
162 int (*get_timeout) (struct ipack_device *dev);
163 int (*reset_timeout) (struct ipack_device *dev);
167 * struct ipack_bus_device
169 * @dev: pointer to carrier device
170 * @slots: number of slots available
171 * @bus_nr: ipack bus number
172 * @ops: bus operations for the mezzanine drivers
174 struct ipack_bus_device {
175 struct device *parent;
178 const struct ipack_bus_ops *ops;
182 * ipack_bus_register -- register a new ipack bus
184 * @parent: pointer to the parent device, if any.
185 * @slots: number of slots available in the bus device.
186 * @ops: bus operations for the mezzanine drivers.
188 * The carrier board device should call this function to register itself as
189 * available bus device in ipack.
191 struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
192 const struct ipack_bus_ops *ops);
195 * ipack_bus_unregister -- unregister an ipack bus
197 int ipack_bus_unregister(struct ipack_bus_device *bus);
200 * ipack_driver_register -- Register a new ipack device driver
202 * Called by a ipack driver to register itself as a driver
203 * that can manage ipack devices.
205 int ipack_driver_register(struct ipack_driver *edrv, struct module *owner,
207 void ipack_driver_unregister(struct ipack_driver *edrv);
210 * ipack_device_init -- initialize an IPack device
211 * @dev: the new device to initialize.
213 * Initialize a new IPack device ("module" in IndustryPack jargon). The call
214 * is done by the carrier driver. The carrier should populate the fields
215 * bus and slot as well as the region array of @dev prior to calling this
216 * function. The rest of the fields will be allocated and populated
217 * during initalization.
219 * Return zero on success or error code on failure.
221 * NOTE: _Never_ directly free @dev after calling this function, even
222 * if it returned an error! Always use ipack_put_device() to give up the
223 * reference initialized in this function instead.
225 int ipack_device_init(struct ipack_device *dev);
228 * ipack_device_add -- Add an IPack device
229 * @dev: the new device to add.
231 * Add a new IPack device. The call is done by the carrier driver
232 * after calling ipack_device_init().
234 * Return zero on success or error code on failure.
236 * NOTE: _Never_ directly free @dev after calling this function, even
237 * if it returned an error! Always use ipack_put_device() to give up the
238 * reference initialized in this function instead.
240 int ipack_device_add(struct ipack_device *dev);
241 void ipack_device_del(struct ipack_device *dev);
243 void ipack_get_device(struct ipack_device *dev);
244 void ipack_put_device(struct ipack_device *dev);
247 * DEFINE_IPACK_DEVICE_TABLE - macro used to describe a IndustryPack table
248 * @_table: device table name
250 * This macro is used to create a struct ipack_device_id array (a device table)
251 * in a generic manner.
253 #define DEFINE_IPACK_DEVICE_TABLE(_table) \
254 const struct ipack_device_id _table[]
256 * IPACK_DEVICE - macro used to describe a specific IndustryPack device
257 * @_format: the format version (currently either 1 or 2, 8 bit value)
258 * @vend: the 8 or 24 bit IndustryPack Vendor ID
259 * @dev: the 8 or 16 bit IndustryPack Device ID
261 * This macro is used to create a struct ipack_device_id that matches a specific
264 #define IPACK_DEVICE(_format, vend, dev) \
265 .format = (_format), \