Both the buffer-based and fifo-based icap cores have a status register. Previously, this was only used internally to check whether transactions have completed. However, the status can be useful to the main driver as well. This patch exposes these status functions to the main driver along with some masks for the differnet bits. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
893 lines
22 KiB
C
893 lines
22 KiB
C
/*****************************************************************************
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*
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* Author: Xilinx, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
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* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
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* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
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* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
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* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
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* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
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* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
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* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
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* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
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* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
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* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
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* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* Xilinx products are not intended for use in life support appliances,
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* devices, or systems. Use in such applications is expressly prohibited.
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*
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* (c) Copyright 2002 Xilinx Inc., Systems Engineering Group
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* (c) Copyright 2004 Xilinx Inc., Systems Engineering Group
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* (c) Copyright 2007-2008 Xilinx Inc.
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* All rights reserved.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*****************************************************************************/
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/*
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* This is the code behind /dev/xilinx_icap -- it allows a user-space
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* application to use the Xilinx ICAP subsystem.
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*
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* The following operations are possible:
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*
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* open open the port and initialize for access.
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* release release port
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* write Write a bitstream to the configuration processor.
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* read Read a data stream from the configuration processor.
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*
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* After being opened, the port is initialized and accessed to avoid a
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* corrupted first read which may occur with some hardware. The port
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* is left in a desynched state, requiring that a synch sequence be
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* transmitted before any valid configuration data. A user will have
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* exclusive access to the device while it remains open, and the state
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* of the ICAP cannot be guaranteed after the device is closed. Note
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* that a complete reset of the core and the state of the ICAP cannot
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* be performed on many versions of the cores, hence users of this
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* device should avoid making inconsistent accesses to the device. In
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* particular, accessing the read interface, without first generating
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* a write containing a readback packet can leave the ICAP in an
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* inaccessible state.
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*
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* Note that in order to use the read interface, it is first necessary
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* to write a request packet to the write interface. i.e., it is not
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* possible to simply readback the bitstream (or any configuration
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* bits) from a device without specifically requesting them first.
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* The code to craft such packets is intended to be part of the
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* user-space application code that uses this device. The simplest
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* way to use this interface is simply:
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*
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* cp foo.bit /dev/xilinx_icap
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*
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* Note that unless foo.bit is an appropriately constructed partial
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* bitstream, this has a high likelyhood of overwriting the design
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* currently programmed in the FPGA.
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*/
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/fcntl.h>
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#include <linux/init.h>
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#include <linux/poll.h>
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#include <linux/proc_fs.h>
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#include <linux/mutex.h>
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#include <linux/sysctl.h>
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#include <linux/version.h>
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#include <linux/fs.h>
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#include <linux/cdev.h>
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#include <linux/platform_device.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#ifdef CONFIG_OF
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/* For open firmware. */
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#endif
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#include "xilinx_hwicap.h"
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#include "buffer_icap.h"
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#include "fifo_icap.h"
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#define DRIVER_NAME "xilinx_icap"
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#define HWICAP_REGS (0x10000)
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/* dynamically allocate device number */
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static int xhwicap_major;
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static int xhwicap_minor;
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#define HWICAP_DEVICES 1
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module_param(xhwicap_major, int, S_IRUGO);
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module_param(xhwicap_minor, int, S_IRUGO);
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/* An array, which is set to true when the device is registered. */
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static bool probed_devices[HWICAP_DEVICES];
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static struct mutex icap_sem;
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static struct class *icap_class;
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#define UNIMPLEMENTED 0xFFFF
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static const struct config_registers v2_config_registers = {
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.CRC = 0,
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.FAR = 1,
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.FDRI = 2,
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.FDRO = 3,
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.CMD = 4,
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.CTL = 5,
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.MASK = 6,
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.STAT = 7,
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.LOUT = 8,
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.COR = 9,
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.MFWR = 10,
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.FLR = 11,
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.KEY = 12,
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.CBC = 13,
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.IDCODE = 14,
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.AXSS = UNIMPLEMENTED,
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.C0R_1 = UNIMPLEMENTED,
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.CSOB = UNIMPLEMENTED,
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.WBSTAR = UNIMPLEMENTED,
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.TIMER = UNIMPLEMENTED,
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.BOOTSTS = UNIMPLEMENTED,
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.CTL_1 = UNIMPLEMENTED,
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};
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static const struct config_registers v4_config_registers = {
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.CRC = 0,
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.FAR = 1,
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.FDRI = 2,
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.FDRO = 3,
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.CMD = 4,
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.CTL = 5,
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.MASK = 6,
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.STAT = 7,
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.LOUT = 8,
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.COR = 9,
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.MFWR = 10,
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.FLR = UNIMPLEMENTED,
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.KEY = UNIMPLEMENTED,
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.CBC = 11,
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.IDCODE = 12,
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.AXSS = 13,
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.C0R_1 = UNIMPLEMENTED,
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.CSOB = UNIMPLEMENTED,
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.WBSTAR = UNIMPLEMENTED,
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.TIMER = UNIMPLEMENTED,
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.BOOTSTS = UNIMPLEMENTED,
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.CTL_1 = UNIMPLEMENTED,
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};
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static const struct config_registers v5_config_registers = {
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.CRC = 0,
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.FAR = 1,
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.FDRI = 2,
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.FDRO = 3,
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.CMD = 4,
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.CTL = 5,
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.MASK = 6,
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.STAT = 7,
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.LOUT = 8,
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.COR = 9,
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.MFWR = 10,
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.FLR = UNIMPLEMENTED,
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.KEY = UNIMPLEMENTED,
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.CBC = 11,
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.IDCODE = 12,
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.AXSS = 13,
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.C0R_1 = 14,
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.CSOB = 15,
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.WBSTAR = 16,
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.TIMER = 17,
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.BOOTSTS = 18,
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.CTL_1 = 19,
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};
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/**
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* hwicap_command_desync - Send a DESYNC command to the ICAP port.
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* @drvdata: a pointer to the drvdata.
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*
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* This command desynchronizes the ICAP After this command, a
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* bitstream containing a NULL packet, followed by a SYNCH packet is
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* required before the ICAP will recognize commands.
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*/
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static int hwicap_command_desync(struct hwicap_drvdata *drvdata)
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{
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u32 buffer[4];
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u32 index = 0;
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/*
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* Create the data to be written to the ICAP.
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*/
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buffer[index++] = hwicap_type_1_write(drvdata->config_regs->CMD) | 1;
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buffer[index++] = XHI_CMD_DESYNCH;
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buffer[index++] = XHI_NOOP_PACKET;
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buffer[index++] = XHI_NOOP_PACKET;
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/*
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* Write the data to the FIFO and intiate the transfer of data present
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* in the FIFO to the ICAP device.
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*/
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return drvdata->config->set_configuration(drvdata,
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&buffer[0], index);
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}
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/**
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* hwicap_get_configuration_register - Query a configuration register.
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* @drvdata: a pointer to the drvdata.
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* @reg: a constant which represents the configuration
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* register value to be returned.
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* Examples: XHI_IDCODE, XHI_FLR.
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* @reg_data: returns the value of the register.
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*
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* Sends a query packet to the ICAP and then receives the response.
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* The icap is left in Synched state.
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*/
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static int hwicap_get_configuration_register(struct hwicap_drvdata *drvdata,
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u32 reg, u32 *reg_data)
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{
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int status;
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u32 buffer[6];
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u32 index = 0;
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/*
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* Create the data to be written to the ICAP.
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*/
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buffer[index++] = XHI_DUMMY_PACKET;
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buffer[index++] = XHI_SYNC_PACKET;
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buffer[index++] = XHI_NOOP_PACKET;
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buffer[index++] = hwicap_type_1_read(reg) | 1;
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buffer[index++] = XHI_NOOP_PACKET;
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buffer[index++] = XHI_NOOP_PACKET;
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/*
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* Write the data to the FIFO and intiate the transfer of data present
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* in the FIFO to the ICAP device.
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*/
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status = drvdata->config->set_configuration(drvdata,
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&buffer[0], index);
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if (status)
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return status;
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/*
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* Read the configuration register
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*/
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status = drvdata->config->get_configuration(drvdata, reg_data, 1);
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if (status)
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return status;
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return 0;
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}
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static int hwicap_initialize_hwicap(struct hwicap_drvdata *drvdata)
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{
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int status;
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u32 idcode;
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dev_dbg(drvdata->dev, "initializing\n");
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/* Abort any current transaction, to make sure we have the
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* ICAP in a good state. */
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dev_dbg(drvdata->dev, "Reset...\n");
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drvdata->config->reset(drvdata);
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dev_dbg(drvdata->dev, "Desync...\n");
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status = hwicap_command_desync(drvdata);
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if (status)
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return status;
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/* Attempt to read the IDCODE from ICAP. This
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* may not be returned correctly, due to the design of the
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* hardware.
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*/
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dev_dbg(drvdata->dev, "Reading IDCODE...\n");
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status = hwicap_get_configuration_register(
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drvdata, drvdata->config_regs->IDCODE, &idcode);
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dev_dbg(drvdata->dev, "IDCODE = %x\n", idcode);
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if (status)
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return status;
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dev_dbg(drvdata->dev, "Desync...\n");
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status = hwicap_command_desync(drvdata);
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if (status)
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return status;
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return 0;
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}
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static ssize_t
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hwicap_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
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{
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struct hwicap_drvdata *drvdata = file->private_data;
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ssize_t bytes_to_read = 0;
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u32 *kbuf;
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u32 words;
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u32 bytes_remaining;
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int status;
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status = mutex_lock_interruptible(&drvdata->sem);
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if (status)
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return status;
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if (drvdata->read_buffer_in_use) {
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/* If there are leftover bytes in the buffer, just */
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/* return them and don't try to read more from the */
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/* ICAP device. */
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bytes_to_read =
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(count < drvdata->read_buffer_in_use) ? count :
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drvdata->read_buffer_in_use;
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/* Return the data currently in the read buffer. */
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if (copy_to_user(buf, drvdata->read_buffer, bytes_to_read)) {
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status = -EFAULT;
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goto error;
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}
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drvdata->read_buffer_in_use -= bytes_to_read;
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memmove(drvdata->read_buffer,
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drvdata->read_buffer + bytes_to_read,
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4 - bytes_to_read);
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} else {
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/* Get new data from the ICAP, and return was was requested. */
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kbuf = (u32 *) get_zeroed_page(GFP_KERNEL);
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if (!kbuf) {
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status = -ENOMEM;
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goto error;
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}
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/* The ICAP device is only able to read complete */
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/* words. If a number of bytes that do not correspond */
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/* to complete words is requested, then we read enough */
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/* words to get the required number of bytes, and then */
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/* save the remaining bytes for the next read. */
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/* Determine the number of words to read, rounding up */
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/* if necessary. */
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words = ((count + 3) >> 2);
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bytes_to_read = words << 2;
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if (bytes_to_read > PAGE_SIZE)
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bytes_to_read = PAGE_SIZE;
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/* Ensure we only read a complete number of words. */
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bytes_remaining = bytes_to_read & 3;
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bytes_to_read &= ~3;
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words = bytes_to_read >> 2;
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status = drvdata->config->get_configuration(drvdata,
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kbuf, words);
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/* If we didn't read correctly, then bail out. */
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if (status) {
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free_page((unsigned long)kbuf);
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goto error;
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}
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/* If we fail to return the data to the user, then bail out. */
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if (copy_to_user(buf, kbuf, bytes_to_read)) {
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free_page((unsigned long)kbuf);
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status = -EFAULT;
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goto error;
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}
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memcpy(drvdata->read_buffer,
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kbuf,
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bytes_remaining);
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drvdata->read_buffer_in_use = bytes_remaining;
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free_page((unsigned long)kbuf);
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}
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status = bytes_to_read;
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error:
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mutex_unlock(&drvdata->sem);
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return status;
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}
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static ssize_t
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hwicap_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct hwicap_drvdata *drvdata = file->private_data;
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ssize_t written = 0;
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ssize_t left = count;
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u32 *kbuf;
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ssize_t len;
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ssize_t status;
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status = mutex_lock_interruptible(&drvdata->sem);
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if (status)
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return status;
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left += drvdata->write_buffer_in_use;
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/* Only write multiples of 4 bytes. */
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if (left < 4) {
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status = 0;
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goto error;
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}
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kbuf = (u32 *) __get_free_page(GFP_KERNEL);
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if (!kbuf) {
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status = -ENOMEM;
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goto error;
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}
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while (left > 3) {
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/* only write multiples of 4 bytes, so there might */
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/* be as many as 3 bytes left (at the end). */
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len = left;
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if (len > PAGE_SIZE)
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len = PAGE_SIZE;
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len &= ~3;
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if (drvdata->write_buffer_in_use) {
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memcpy(kbuf, drvdata->write_buffer,
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drvdata->write_buffer_in_use);
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if (copy_from_user(
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(((char *)kbuf) + drvdata->write_buffer_in_use),
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buf + written,
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len - (drvdata->write_buffer_in_use))) {
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free_page((unsigned long)kbuf);
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status = -EFAULT;
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goto error;
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}
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} else {
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if (copy_from_user(kbuf, buf + written, len)) {
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free_page((unsigned long)kbuf);
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status = -EFAULT;
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goto error;
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}
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}
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status = drvdata->config->set_configuration(drvdata,
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kbuf, len >> 2);
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if (status) {
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free_page((unsigned long)kbuf);
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status = -EFAULT;
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goto error;
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}
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if (drvdata->write_buffer_in_use) {
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len -= drvdata->write_buffer_in_use;
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left -= drvdata->write_buffer_in_use;
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drvdata->write_buffer_in_use = 0;
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}
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written += len;
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left -= len;
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}
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if ((left > 0) && (left < 4)) {
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if (!copy_from_user(drvdata->write_buffer,
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buf + written, left)) {
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drvdata->write_buffer_in_use = left;
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written += left;
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left = 0;
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}
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}
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free_page((unsigned long)kbuf);
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status = written;
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error:
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mutex_unlock(&drvdata->sem);
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return status;
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}
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static int hwicap_open(struct inode *inode, struct file *file)
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{
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struct hwicap_drvdata *drvdata;
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int status;
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drvdata = container_of(inode->i_cdev, struct hwicap_drvdata, cdev);
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status = mutex_lock_interruptible(&drvdata->sem);
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if (status)
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return status;
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if (drvdata->is_open) {
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status = -EBUSY;
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goto error;
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}
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status = hwicap_initialize_hwicap(drvdata);
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if (status) {
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dev_err(drvdata->dev, "Failed to open file");
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goto error;
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}
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file->private_data = drvdata;
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drvdata->write_buffer_in_use = 0;
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drvdata->read_buffer_in_use = 0;
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drvdata->is_open = 1;
|
|
|
|
error:
|
|
mutex_unlock(&drvdata->sem);
|
|
return status;
|
|
}
|
|
|
|
static int hwicap_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct hwicap_drvdata *drvdata = file->private_data;
|
|
int i;
|
|
int status = 0;
|
|
|
|
mutex_lock(&drvdata->sem);
|
|
|
|
if (drvdata->write_buffer_in_use) {
|
|
/* Flush write buffer. */
|
|
for (i = drvdata->write_buffer_in_use; i < 4; i++)
|
|
drvdata->write_buffer[i] = 0;
|
|
|
|
status = drvdata->config->set_configuration(drvdata,
|
|
(u32 *) drvdata->write_buffer, 1);
|
|
if (status)
|
|
goto error;
|
|
}
|
|
|
|
status = hwicap_command_desync(drvdata);
|
|
if (status)
|
|
goto error;
|
|
|
|
error:
|
|
drvdata->is_open = 0;
|
|
mutex_unlock(&drvdata->sem);
|
|
return status;
|
|
}
|
|
|
|
static struct file_operations hwicap_fops = {
|
|
.owner = THIS_MODULE,
|
|
.write = hwicap_write,
|
|
.read = hwicap_read,
|
|
.open = hwicap_open,
|
|
.release = hwicap_release,
|
|
};
|
|
|
|
static int __devinit hwicap_setup(struct device *dev, int id,
|
|
const struct resource *regs_res,
|
|
const struct hwicap_driver_config *config,
|
|
const struct config_registers *config_regs)
|
|
{
|
|
dev_t devt;
|
|
struct hwicap_drvdata *drvdata = NULL;
|
|
int retval = 0;
|
|
|
|
dev_info(dev, "Xilinx icap port driver\n");
|
|
|
|
mutex_lock(&icap_sem);
|
|
|
|
if (id < 0) {
|
|
for (id = 0; id < HWICAP_DEVICES; id++)
|
|
if (!probed_devices[id])
|
|
break;
|
|
}
|
|
if (id < 0 || id >= HWICAP_DEVICES) {
|
|
mutex_unlock(&icap_sem);
|
|
dev_err(dev, "%s%i too large\n", DRIVER_NAME, id);
|
|
return -EINVAL;
|
|
}
|
|
if (probed_devices[id]) {
|
|
mutex_unlock(&icap_sem);
|
|
dev_err(dev, "cannot assign to %s%i; it is already in use\n",
|
|
DRIVER_NAME, id);
|
|
return -EBUSY;
|
|
}
|
|
|
|
probed_devices[id] = 1;
|
|
mutex_unlock(&icap_sem);
|
|
|
|
devt = MKDEV(xhwicap_major, xhwicap_minor + id);
|
|
|
|
drvdata = kzalloc(sizeof(struct hwicap_drvdata), GFP_KERNEL);
|
|
if (!drvdata) {
|
|
dev_err(dev, "Couldn't allocate device private record\n");
|
|
retval = -ENOMEM;
|
|
goto failed0;
|
|
}
|
|
dev_set_drvdata(dev, (void *)drvdata);
|
|
|
|
if (!regs_res) {
|
|
dev_err(dev, "Couldn't get registers resource\n");
|
|
retval = -EFAULT;
|
|
goto failed1;
|
|
}
|
|
|
|
drvdata->mem_start = regs_res->start;
|
|
drvdata->mem_end = regs_res->end;
|
|
drvdata->mem_size = regs_res->end - regs_res->start + 1;
|
|
|
|
if (!request_mem_region(drvdata->mem_start,
|
|
drvdata->mem_size, DRIVER_NAME)) {
|
|
dev_err(dev, "Couldn't lock memory region at %p\n",
|
|
(void *)regs_res->start);
|
|
retval = -EBUSY;
|
|
goto failed1;
|
|
}
|
|
|
|
drvdata->devt = devt;
|
|
drvdata->dev = dev;
|
|
drvdata->base_address = ioremap(drvdata->mem_start, drvdata->mem_size);
|
|
if (!drvdata->base_address) {
|
|
dev_err(dev, "ioremap() failed\n");
|
|
goto failed2;
|
|
}
|
|
|
|
drvdata->config = config;
|
|
drvdata->config_regs = config_regs;
|
|
|
|
mutex_init(&drvdata->sem);
|
|
drvdata->is_open = 0;
|
|
|
|
dev_info(dev, "ioremap %lx to %p with size %x\n",
|
|
(unsigned long int)drvdata->mem_start,
|
|
drvdata->base_address, drvdata->mem_size);
|
|
|
|
cdev_init(&drvdata->cdev, &hwicap_fops);
|
|
drvdata->cdev.owner = THIS_MODULE;
|
|
retval = cdev_add(&drvdata->cdev, devt, 1);
|
|
if (retval) {
|
|
dev_err(dev, "cdev_add() failed\n");
|
|
goto failed3;
|
|
}
|
|
/* devfs_mk_cdev(devt, S_IFCHR|S_IRUGO|S_IWUGO, DRIVER_NAME); */
|
|
device_create(icap_class, dev, devt, "%s%d", DRIVER_NAME, id);
|
|
return 0; /* success */
|
|
|
|
failed3:
|
|
iounmap(drvdata->base_address);
|
|
|
|
failed2:
|
|
release_mem_region(regs_res->start, drvdata->mem_size);
|
|
|
|
failed1:
|
|
kfree(drvdata);
|
|
|
|
failed0:
|
|
mutex_lock(&icap_sem);
|
|
probed_devices[id] = 0;
|
|
mutex_unlock(&icap_sem);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static struct hwicap_driver_config buffer_icap_config = {
|
|
.get_configuration = buffer_icap_get_configuration,
|
|
.set_configuration = buffer_icap_set_configuration,
|
|
.get_status = buffer_icap_get_status,
|
|
.reset = buffer_icap_reset,
|
|
};
|
|
|
|
static struct hwicap_driver_config fifo_icap_config = {
|
|
.get_configuration = fifo_icap_get_configuration,
|
|
.set_configuration = fifo_icap_set_configuration,
|
|
.get_status = fifo_icap_get_status,
|
|
.reset = fifo_icap_reset,
|
|
};
|
|
|
|
static int __devexit hwicap_remove(struct device *dev)
|
|
{
|
|
struct hwicap_drvdata *drvdata;
|
|
|
|
drvdata = (struct hwicap_drvdata *)dev_get_drvdata(dev);
|
|
|
|
if (!drvdata)
|
|
return 0;
|
|
|
|
device_destroy(icap_class, drvdata->devt);
|
|
cdev_del(&drvdata->cdev);
|
|
iounmap(drvdata->base_address);
|
|
release_mem_region(drvdata->mem_start, drvdata->mem_size);
|
|
kfree(drvdata);
|
|
dev_set_drvdata(dev, NULL);
|
|
|
|
mutex_lock(&icap_sem);
|
|
probed_devices[MINOR(dev->devt)-xhwicap_minor] = 0;
|
|
mutex_unlock(&icap_sem);
|
|
return 0; /* success */
|
|
}
|
|
|
|
static int __devinit hwicap_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
const struct config_registers *regs;
|
|
const char *family;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return -ENODEV;
|
|
|
|
/* It's most likely that we're using V4, if the family is not
|
|
specified */
|
|
regs = &v4_config_registers;
|
|
family = pdev->dev.platform_data;
|
|
|
|
if (family) {
|
|
if (!strcmp(family, "virtex2p")) {
|
|
regs = &v2_config_registers;
|
|
} else if (!strcmp(family, "virtex4")) {
|
|
regs = &v4_config_registers;
|
|
} else if (!strcmp(family, "virtex5")) {
|
|
regs = &v5_config_registers;
|
|
}
|
|
}
|
|
|
|
return hwicap_setup(&pdev->dev, pdev->id, res,
|
|
&buffer_icap_config, regs);
|
|
}
|
|
|
|
static int __devexit hwicap_drv_remove(struct platform_device *pdev)
|
|
{
|
|
return hwicap_remove(&pdev->dev);
|
|
}
|
|
|
|
static struct platform_driver hwicap_platform_driver = {
|
|
.probe = hwicap_drv_probe,
|
|
.remove = hwicap_drv_remove,
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = DRIVER_NAME,
|
|
},
|
|
};
|
|
|
|
/* ---------------------------------------------------------------------
|
|
* OF bus binding
|
|
*/
|
|
|
|
#if defined(CONFIG_OF)
|
|
static int __devinit
|
|
hwicap_of_probe(struct of_device *op, const struct of_device_id *match)
|
|
{
|
|
struct resource res;
|
|
const unsigned int *id;
|
|
const char *family;
|
|
int rc;
|
|
const struct hwicap_driver_config *config = match->data;
|
|
const struct config_registers *regs;
|
|
|
|
dev_dbg(&op->dev, "hwicap_of_probe(%p, %p)\n", op, match);
|
|
|
|
rc = of_address_to_resource(op->node, 0, &res);
|
|
if (rc) {
|
|
dev_err(&op->dev, "invalid address\n");
|
|
return rc;
|
|
}
|
|
|
|
id = of_get_property(op->node, "port-number", NULL);
|
|
|
|
/* It's most likely that we're using V4, if the family is not
|
|
specified */
|
|
regs = &v4_config_registers;
|
|
family = of_get_property(op->node, "xlnx,family", NULL);
|
|
|
|
if (family) {
|
|
if (!strcmp(family, "virtex2p")) {
|
|
regs = &v2_config_registers;
|
|
} else if (!strcmp(family, "virtex4")) {
|
|
regs = &v4_config_registers;
|
|
} else if (!strcmp(family, "virtex5")) {
|
|
regs = &v5_config_registers;
|
|
}
|
|
}
|
|
return hwicap_setup(&op->dev, id ? *id : -1, &res, config,
|
|
regs);
|
|
}
|
|
|
|
static int __devexit hwicap_of_remove(struct of_device *op)
|
|
{
|
|
return hwicap_remove(&op->dev);
|
|
}
|
|
|
|
/* Match table for of_platform binding */
|
|
static const struct of_device_id __devinit hwicap_of_match[] = {
|
|
{ .compatible = "xlnx,opb-hwicap-1.00.b", .data = &buffer_icap_config},
|
|
{ .compatible = "xlnx,xps-hwicap-1.00.a", .data = &fifo_icap_config},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, hwicap_of_match);
|
|
|
|
static struct of_platform_driver hwicap_of_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = DRIVER_NAME,
|
|
.match_table = hwicap_of_match,
|
|
.probe = hwicap_of_probe,
|
|
.remove = __devexit_p(hwicap_of_remove),
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
};
|
|
|
|
/* Registration helpers to keep the number of #ifdefs to a minimum */
|
|
static inline int __init hwicap_of_register(void)
|
|
{
|
|
pr_debug("hwicap: calling of_register_platform_driver()\n");
|
|
return of_register_platform_driver(&hwicap_of_driver);
|
|
}
|
|
|
|
static inline void __exit hwicap_of_unregister(void)
|
|
{
|
|
of_unregister_platform_driver(&hwicap_of_driver);
|
|
}
|
|
#else /* CONFIG_OF */
|
|
/* CONFIG_OF not enabled; do nothing helpers */
|
|
static inline int __init hwicap_of_register(void) { return 0; }
|
|
static inline void __exit hwicap_of_unregister(void) { }
|
|
#endif /* CONFIG_OF */
|
|
|
|
static int __init hwicap_module_init(void)
|
|
{
|
|
dev_t devt;
|
|
int retval;
|
|
|
|
icap_class = class_create(THIS_MODULE, "xilinx_config");
|
|
mutex_init(&icap_sem);
|
|
|
|
if (xhwicap_major) {
|
|
devt = MKDEV(xhwicap_major, xhwicap_minor);
|
|
retval = register_chrdev_region(
|
|
devt,
|
|
HWICAP_DEVICES,
|
|
DRIVER_NAME);
|
|
if (retval < 0)
|
|
return retval;
|
|
} else {
|
|
retval = alloc_chrdev_region(&devt,
|
|
xhwicap_minor,
|
|
HWICAP_DEVICES,
|
|
DRIVER_NAME);
|
|
if (retval < 0)
|
|
return retval;
|
|
xhwicap_major = MAJOR(devt);
|
|
}
|
|
|
|
retval = platform_driver_register(&hwicap_platform_driver);
|
|
|
|
if (retval)
|
|
goto failed1;
|
|
|
|
retval = hwicap_of_register();
|
|
|
|
if (retval)
|
|
goto failed2;
|
|
|
|
return retval;
|
|
|
|
failed2:
|
|
platform_driver_unregister(&hwicap_platform_driver);
|
|
|
|
failed1:
|
|
unregister_chrdev_region(devt, HWICAP_DEVICES);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void __exit hwicap_module_cleanup(void)
|
|
{
|
|
dev_t devt = MKDEV(xhwicap_major, xhwicap_minor);
|
|
|
|
class_destroy(icap_class);
|
|
|
|
platform_driver_unregister(&hwicap_platform_driver);
|
|
|
|
hwicap_of_unregister();
|
|
|
|
unregister_chrdev_region(devt, HWICAP_DEVICES);
|
|
}
|
|
|
|
module_init(hwicap_module_init);
|
|
module_exit(hwicap_module_cleanup);
|
|
|
|
MODULE_AUTHOR("Xilinx, Inc; Xilinx Research Labs Group");
|
|
MODULE_DESCRIPTION("Xilinx ICAP Port Driver");
|
|
MODULE_LICENSE("GPL");
|