forked from Minki/linux
Merge branch 'virtex-for-2.6.25' of git://git.secretlab.ca/git/linux-2.6-virtex into for-2.6.25
This commit is contained in:
Josh Boyer
commit
256ae6a720
@ -2578,6 +2578,20 @@ platforms are moved over to use the flattened-device-tree model.
|
||||
Requred properties:
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||||
- current-speed : Baud rate of uartlite
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||||
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||||
v) Xilinx hwicap
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||||
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Xilinx hwicap devices provide access to the configuration logic
|
||||
of the FPGA through the Internal Configuration Access Port
|
||||
(ICAP). The ICAP enables partial reconfiguration of the FPGA,
|
||||
readback of the configuration information, and some control over
|
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'warm boots' of the FPGA fabric.
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||||
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||||
Required properties:
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||||
- xlnx,family : The family of the FPGA, necessary since the
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||||
capabilities of the underlying ICAP hardware
|
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differ between different families. May be
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'virtex2p', 'virtex4', or 'virtex5'.
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p) Freescale Synchronous Serial Interface
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||||
The SSI is a serial device that communicates with audio codecs. It can
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||||
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@ -37,7 +37,7 @@ static int __init virtex_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (!of_flat_dt_is_compatible(root, "xilinx,virtex"))
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if (!of_flat_dt_is_compatible(root, "xlnx,virtex"))
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return 0;
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return 1;
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@ -1202,8 +1202,10 @@ static int __devexit ace_of_remove(struct of_device *op)
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}
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/* Match table for of_platform binding */
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static struct of_device_id __devinit ace_of_match[] = {
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{ .compatible = "xilinx,xsysace", },
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static struct of_device_id ace_of_match[] __devinitdata = {
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{ .compatible = "xlnx,opb-sysace-1.00.b", },
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{ .compatible = "xlnx,opb-sysace-1.00.c", },
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{ .compatible = "xlnx,xps-sysace-1.00.a", },
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{},
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};
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MODULE_DEVICE_TABLE(of, ace_of_match);
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@ -841,6 +841,16 @@ config DTLK
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To compile this driver as a module, choose M here: the
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module will be called dtlk.
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config XILINX_HWICAP
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tristate "Xilinx HWICAP Support"
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depends on XILINX_VIRTEX
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help
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This option enables support for Xilinx Internal Configuration
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Access Port (ICAP) driver. The ICAP is used on Xilinx Virtex
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FPGA platforms to partially reconfigure the FPGA at runtime.
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If unsure, say N.
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config R3964
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tristate "Siemens R3964 line discipline"
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---help---
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@ -77,6 +77,7 @@ obj-$(CONFIG_EFI_RTC) += efirtc.o
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obj-$(CONFIG_SGI_DS1286) += ds1286.o
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obj-$(CONFIG_SGI_IP27_RTC) += ip27-rtc.o
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obj-$(CONFIG_DS1302) += ds1302.o
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obj-$(CONFIG_XILINX_HWICAP) += xilinx_hwicap/
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ifeq ($(CONFIG_GENERIC_NVRAM),y)
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obj-$(CONFIG_NVRAM) += generic_nvram.o
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else
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7
drivers/char/xilinx_hwicap/Makefile
Normal file
7
drivers/char/xilinx_hwicap/Makefile
Normal file
@ -0,0 +1,7 @@
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#
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# Makefile for the Xilinx OPB hwicap driver
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#
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obj-$(CONFIG_XILINX_HWICAP) += xilinx_hwicap_m.o
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xilinx_hwicap_m-y := xilinx_hwicap.o fifo_icap.o buffer_icap.o
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380
drivers/char/xilinx_hwicap/buffer_icap.c
Normal file
380
drivers/char/xilinx_hwicap/buffer_icap.c
Normal file
@ -0,0 +1,380 @@
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/*****************************************************************************
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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
|
||||
* 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,
|
||||
* 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
|
||||
* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
|
||||
* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
|
||||
* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
|
||||
* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
|
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* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* 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 2003-2008 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
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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||||
*****************************************************************************/
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#include "buffer_icap.h"
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/* Indicates how many bytes will fit in a buffer. (1 BRAM) */
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#define XHI_MAX_BUFFER_BYTES 2048
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#define XHI_MAX_BUFFER_INTS (XHI_MAX_BUFFER_BYTES >> 2)
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/* File access and error constants */
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#define XHI_DEVICE_READ_ERROR -1
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#define XHI_DEVICE_WRITE_ERROR -2
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#define XHI_BUFFER_OVERFLOW_ERROR -3
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#define XHI_DEVICE_READ 0x1
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#define XHI_DEVICE_WRITE 0x0
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/* Constants for checking transfer status */
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#define XHI_CYCLE_DONE 0
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#define XHI_CYCLE_EXECUTING 1
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/* buffer_icap register offsets */
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/* Size of transfer, read & write */
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#define XHI_SIZE_REG_OFFSET 0x800L
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/* offset into bram, read & write */
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#define XHI_BRAM_OFFSET_REG_OFFSET 0x804L
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/* Read not Configure, direction of transfer. Write only */
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#define XHI_RNC_REG_OFFSET 0x808L
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/* Indicates transfer complete. Read only */
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#define XHI_STATUS_REG_OFFSET 0x80CL
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/* Constants for setting the RNC register */
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#define XHI_CONFIGURE 0x0UL
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#define XHI_READBACK 0x1UL
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||||
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||||
/* Constants for the Done register */
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||||
#define XHI_NOT_FINISHED 0x0UL
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#define XHI_FINISHED 0x1UL
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#define XHI_BUFFER_START 0
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||||
/**
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||||
* buffer_icap_get_status: Get the contents of the status register.
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* @parameter base_address: is the base address of the device
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||||
*
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||||
* The status register contains the ICAP status and the done bit.
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||||
*
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||||
* D8 - cfgerr
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||||
* D7 - dalign
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* D6 - rip
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||||
* D5 - in_abort_l
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||||
* D4 - Always 1
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||||
* D3 - Always 1
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||||
* D2 - Always 1
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||||
* D1 - Always 1
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* D0 - Done bit
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||||
**/
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static inline u32 buffer_icap_get_status(void __iomem *base_address)
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{
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||||
return in_be32(base_address + XHI_STATUS_REG_OFFSET);
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||||
}
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||||
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||||
/**
|
||||
* buffer_icap_get_bram: Reads data from the storage buffer bram.
|
||||
* @parameter base_address: contains the base address of the component.
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||||
* @parameter offset: The word offset from which the data should be read.
|
||||
*
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||||
* A bram is used as a configuration memory cache. One frame of data can
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||||
* be stored in this "storage buffer".
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||||
**/
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||||
static inline u32 buffer_icap_get_bram(void __iomem *base_address,
|
||||
u32 offset)
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||||
{
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||||
return in_be32(base_address + (offset << 2));
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||||
}
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||||
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||||
/**
|
||||
* buffer_icap_busy: Return true if the icap device is busy
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||||
* @parameter base_address: is the base address of the device
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*
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||||
* The queries the low order bit of the status register, which
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||||
* indicates whether the current configuration or readback operation
|
||||
* has completed.
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||||
**/
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||||
static inline bool buffer_icap_busy(void __iomem *base_address)
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{
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||||
return (buffer_icap_get_status(base_address) & 1) == XHI_NOT_FINISHED;
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||||
}
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||||
|
||||
/**
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||||
* buffer_icap_busy: Return true if the icap device is not busy
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||||
* @parameter base_address: is the base address of the device
|
||||
*
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||||
* The queries the low order bit of the status register, which
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||||
* indicates whether the current configuration or readback operation
|
||||
* has completed.
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**/
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static inline bool buffer_icap_done(void __iomem *base_address)
|
||||
{
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return (buffer_icap_get_status(base_address) & 1) == XHI_FINISHED;
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}
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||||
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||||
/**
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* buffer_icap_set_size: Set the size register.
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* @parameter base_address: is the base address of the device
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* @parameter data: The size in bytes.
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*
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* The size register holds the number of 8 bit bytes to transfer between
|
||||
* bram and the icap (or icap to bram).
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||||
**/
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static inline void buffer_icap_set_size(void __iomem *base_address,
|
||||
u32 data)
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||||
{
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out_be32(base_address + XHI_SIZE_REG_OFFSET, data);
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}
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/**
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* buffer_icap_mSetoffsetReg: Set the bram offset register.
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* @parameter base_address: contains the base address of the device.
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* @parameter data: is the value to be written to the data register.
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*
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* The bram offset register holds the starting bram address to transfer
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* data from during configuration or write data to during readback.
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**/
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static inline void buffer_icap_set_offset(void __iomem *base_address,
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u32 data)
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{
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out_be32(base_address + XHI_BRAM_OFFSET_REG_OFFSET, data);
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}
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/**
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||||
* buffer_icap_set_rnc: Set the RNC (Readback not Configure) register.
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* @parameter base_address: contains the base address of the device.
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* @parameter data: is the value to be written to the data register.
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||||
*
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||||
* The RNC register determines the direction of the data transfer. It
|
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* controls whether a configuration or readback take place. Writing to
|
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* this register initiates the transfer. A value of 1 initiates a
|
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* readback while writing a value of 0 initiates a configuration.
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||||
**/
|
||||
static inline void buffer_icap_set_rnc(void __iomem *base_address,
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u32 data)
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||||
{
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||||
out_be32(base_address + XHI_RNC_REG_OFFSET, data);
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||||
}
|
||||
|
||||
/**
|
||||
* buffer_icap_set_bram: Write data to the storage buffer bram.
|
||||
* @parameter base_address: contains the base address of the component.
|
||||
* @parameter offset: The word offset at which the data should be written.
|
||||
* @parameter data: The value to be written to the bram offset.
|
||||
*
|
||||
* A bram is used as a configuration memory cache. One frame of data can
|
||||
* be stored in this "storage buffer".
|
||||
**/
|
||||
static inline void buffer_icap_set_bram(void __iomem *base_address,
|
||||
u32 offset, u32 data)
|
||||
{
|
||||
out_be32(base_address + (offset << 2), data);
|
||||
}
|
||||
|
||||
/**
|
||||
* buffer_icap_device_read: Transfer bytes from ICAP to the storage buffer.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter offset: The storage buffer start address.
|
||||
* @parameter count: The number of words (32 bit) to read from the
|
||||
* device (ICAP).
|
||||
**/
|
||||
static int buffer_icap_device_read(struct hwicap_drvdata *drvdata,
|
||||
u32 offset, u32 count)
|
||||
{
|
||||
|
||||
s32 retries = 0;
|
||||
void __iomem *base_address = drvdata->base_address;
|
||||
|
||||
if (buffer_icap_busy(base_address))
|
||||
return -EBUSY;
|
||||
|
||||
if ((offset + count) > XHI_MAX_BUFFER_INTS)
|
||||
return -EINVAL;
|
||||
|
||||
/* setSize count*4 to get bytes. */
|
||||
buffer_icap_set_size(base_address, (count << 2));
|
||||
buffer_icap_set_offset(base_address, offset);
|
||||
buffer_icap_set_rnc(base_address, XHI_READBACK);
|
||||
|
||||
while (buffer_icap_busy(base_address)) {
|
||||
retries++;
|
||||
if (retries > XHI_MAX_RETRIES)
|
||||
return -EBUSY;
|
||||
}
|
||||
return 0;
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* buffer_icap_device_write: Transfer bytes from ICAP to the storage buffer.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter offset: The storage buffer start address.
|
||||
* @parameter count: The number of words (32 bit) to read from the
|
||||
* device (ICAP).
|
||||
**/
|
||||
static int buffer_icap_device_write(struct hwicap_drvdata *drvdata,
|
||||
u32 offset, u32 count)
|
||||
{
|
||||
|
||||
s32 retries = 0;
|
||||
void __iomem *base_address = drvdata->base_address;
|
||||
|
||||
if (buffer_icap_busy(base_address))
|
||||
return -EBUSY;
|
||||
|
||||
if ((offset + count) > XHI_MAX_BUFFER_INTS)
|
||||
return -EINVAL;
|
||||
|
||||
/* setSize count*4 to get bytes. */
|
||||
buffer_icap_set_size(base_address, count << 2);
|
||||
buffer_icap_set_offset(base_address, offset);
|
||||
buffer_icap_set_rnc(base_address, XHI_CONFIGURE);
|
||||
|
||||
while (buffer_icap_busy(base_address)) {
|
||||
retries++;
|
||||
if (retries > XHI_MAX_RETRIES)
|
||||
return -EBUSY;
|
||||
}
|
||||
return 0;
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* buffer_icap_reset: Reset the logic of the icap device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* Writing to the status register resets the ICAP logic in an internal
|
||||
* version of the core. For the version of the core published in EDK,
|
||||
* this is a noop.
|
||||
**/
|
||||
void buffer_icap_reset(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
out_be32(drvdata->base_address + XHI_STATUS_REG_OFFSET, 0xFEFE);
|
||||
}
|
||||
|
||||
/**
|
||||
* buffer_icap_set_configuration: Load a partial bitstream from system memory.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter data: Kernel address of the partial bitstream.
|
||||
* @parameter size: the size of the partial bitstream in 32 bit words.
|
||||
**/
|
||||
int buffer_icap_set_configuration(struct hwicap_drvdata *drvdata, u32 *data,
|
||||
u32 size)
|
||||
{
|
||||
int status;
|
||||
s32 buffer_count = 0;
|
||||
s32 num_writes = 0;
|
||||
bool dirty = 0;
|
||||
u32 i;
|
||||
void __iomem *base_address = drvdata->base_address;
|
||||
|
||||
/* Loop through all the data */
|
||||
for (i = 0, buffer_count = 0; i < size; i++) {
|
||||
|
||||
/* Copy data to bram */
|
||||
buffer_icap_set_bram(base_address, buffer_count, data[i]);
|
||||
dirty = 1;
|
||||
|
||||
if (buffer_count < XHI_MAX_BUFFER_INTS - 1) {
|
||||
buffer_count++;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Write data to ICAP */
|
||||
status = buffer_icap_device_write(
|
||||
drvdata,
|
||||
XHI_BUFFER_START,
|
||||
XHI_MAX_BUFFER_INTS);
|
||||
if (status != 0) {
|
||||
/* abort. */
|
||||
buffer_icap_reset(drvdata);
|
||||
return status;
|
||||
}
|
||||
|
||||
buffer_count = 0;
|
||||
num_writes++;
|
||||
dirty = 0;
|
||||
}
|
||||
|
||||
/* Write unwritten data to ICAP */
|
||||
if (dirty) {
|
||||
/* Write data to ICAP */
|
||||
status = buffer_icap_device_write(drvdata, XHI_BUFFER_START,
|
||||
buffer_count);
|
||||
if (status != 0) {
|
||||
/* abort. */
|
||||
buffer_icap_reset(drvdata);
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
return 0;
|
||||
};
|
||||
|
||||
/**
|
||||
* buffer_icap_get_configuration: Read configuration data from the device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter data: Address of the data representing the partial bitstream
|
||||
* @parameter size: the size of the partial bitstream in 32 bit words.
|
||||
**/
|
||||
int buffer_icap_get_configuration(struct hwicap_drvdata *drvdata, u32 *data,
|
||||
u32 size)
|
||||
{
|
||||
int status;
|
||||
s32 buffer_count = 0;
|
||||
s32 read_count = 0;
|
||||
u32 i;
|
||||
void __iomem *base_address = drvdata->base_address;
|
||||
|
||||
/* Loop through all the data */
|
||||
for (i = 0, buffer_count = XHI_MAX_BUFFER_INTS; i < size; i++) {
|
||||
if (buffer_count == XHI_MAX_BUFFER_INTS) {
|
||||
u32 words_remaining = size - i;
|
||||
u32 words_to_read =
|
||||
words_remaining <
|
||||
XHI_MAX_BUFFER_INTS ? words_remaining :
|
||||
XHI_MAX_BUFFER_INTS;
|
||||
|
||||
/* Read data from ICAP */
|
||||
status = buffer_icap_device_read(
|
||||
drvdata,
|
||||
XHI_BUFFER_START,
|
||||
words_to_read);
|
||||
if (status != 0) {
|
||||
/* abort. */
|
||||
buffer_icap_reset(drvdata);
|
||||
return status;
|
||||
}
|
||||
|
||||
buffer_count = 0;
|
||||
read_count++;
|
||||
}
|
||||
|
||||
/* Copy data from bram */
|
||||
data[i] = buffer_icap_get_bram(base_address, buffer_count);
|
||||
buffer_count++;
|
||||
}
|
||||
|
||||
return 0;
|
||||
};
|
||||
57
drivers/char/xilinx_hwicap/buffer_icap.h
Normal file
57
drivers/char/xilinx_hwicap/buffer_icap.h
Normal file
@ -0,0 +1,57 @@
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Author: Xilinx, 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.
|
||||
*
|
||||
* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
|
||||
* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
|
||||
* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
|
||||
* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
|
||||
* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
|
||||
* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
|
||||
* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
|
||||
* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
|
||||
* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
|
||||
* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
|
||||
* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
|
||||
* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Xilinx products are not intended for use in life support appliances,
|
||||
* devices, or systems. Use in such applications is expressly prohibited.
|
||||
*
|
||||
* (c) Copyright 2003-2008 Xilinx Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef XILINX_BUFFER_ICAP_H_ /* prevent circular inclusions */
|
||||
#define XILINX_BUFFER_ICAP_H_ /* by using protection macros */
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include "xilinx_hwicap.h"
|
||||
|
||||
void buffer_icap_reset(struct hwicap_drvdata *drvdata);
|
||||
|
||||
/* Loads a partial bitstream from system memory. */
|
||||
int buffer_icap_set_configuration(struct hwicap_drvdata *drvdata, u32 *data,
|
||||
u32 Size);
|
||||
|
||||
/* Loads a partial bitstream from system memory. */
|
||||
int buffer_icap_get_configuration(struct hwicap_drvdata *drvdata, u32 *data,
|
||||
u32 Size);
|
||||
|
||||
#endif
|
||||
381
drivers/char/xilinx_hwicap/fifo_icap.c
Normal file
381
drivers/char/xilinx_hwicap/fifo_icap.c
Normal file
@ -0,0 +1,381 @@
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Author: Xilinx, 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.
|
||||
*
|
||||
* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
|
||||
* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
|
||||
* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
|
||||
* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
|
||||
* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
|
||||
* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
|
||||
* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
|
||||
* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
|
||||
* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
|
||||
* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
|
||||
* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
|
||||
* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Xilinx products are not intended for use in life support appliances,
|
||||
* devices, or systems. Use in such applications is expressly prohibited.
|
||||
*
|
||||
* (c) Copyright 2007-2008 Xilinx Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
#include "fifo_icap.h"
|
||||
|
||||
/* Register offsets for the XHwIcap device. */
|
||||
#define XHI_GIER_OFFSET 0x1C /* Device Global Interrupt Enable Reg */
|
||||
#define XHI_IPISR_OFFSET 0x20 /* Interrupt Status Register */
|
||||
#define XHI_IPIER_OFFSET 0x28 /* Interrupt Enable Register */
|
||||
#define XHI_WF_OFFSET 0x100 /* Write FIFO */
|
||||
#define XHI_RF_OFFSET 0x104 /* Read FIFO */
|
||||
#define XHI_SZ_OFFSET 0x108 /* Size Register */
|
||||
#define XHI_CR_OFFSET 0x10C /* Control Register */
|
||||
#define XHI_SR_OFFSET 0x110 /* Status Register */
|
||||
#define XHI_WFV_OFFSET 0x114 /* Write FIFO Vacancy Register */
|
||||
#define XHI_RFO_OFFSET 0x118 /* Read FIFO Occupancy Register */
|
||||
|
||||
/* Device Global Interrupt Enable Register (GIER) bit definitions */
|
||||
|
||||
#define XHI_GIER_GIE_MASK 0x80000000 /* Global Interrupt enable Mask */
|
||||
|
||||
/**
|
||||
* HwIcap Device Interrupt Status/Enable Registers
|
||||
*
|
||||
* Interrupt Status Register (IPISR) : This register holds the
|
||||
* interrupt status flags for the device. These bits are toggle on
|
||||
* write.
|
||||
*
|
||||
* Interrupt Enable Register (IPIER) : This register is used to enable
|
||||
* interrupt sources for the device.
|
||||
* Writing a '1' to a bit enables the corresponding interrupt.
|
||||
* Writing a '0' to a bit disables the corresponding interrupt.
|
||||
*
|
||||
* IPISR/IPIER registers have the same bit definitions and are only defined
|
||||
* once.
|
||||
*/
|
||||
#define XHI_IPIXR_RFULL_MASK 0x00000008 /* Read FIFO Full */
|
||||
#define XHI_IPIXR_WEMPTY_MASK 0x00000004 /* Write FIFO Empty */
|
||||
#define XHI_IPIXR_RDP_MASK 0x00000002 /* Read FIFO half full */
|
||||
#define XHI_IPIXR_WRP_MASK 0x00000001 /* Write FIFO half full */
|
||||
#define XHI_IPIXR_ALL_MASK 0x0000000F /* Mask of all interrupts */
|
||||
|
||||
/* Control Register (CR) */
|
||||
#define XHI_CR_SW_RESET_MASK 0x00000008 /* SW Reset Mask */
|
||||
#define XHI_CR_FIFO_CLR_MASK 0x00000004 /* FIFO Clear Mask */
|
||||
#define XHI_CR_READ_MASK 0x00000002 /* Read from ICAP to FIFO */
|
||||
#define XHI_CR_WRITE_MASK 0x00000001 /* Write from FIFO to ICAP */
|
||||
|
||||
/* Status Register (SR) */
|
||||
#define XHI_SR_CFGERR_N_MASK 0x00000100 /* Config Error Mask */
|
||||
#define XHI_SR_DALIGN_MASK 0x00000080 /* Data Alignment Mask */
|
||||
#define XHI_SR_RIP_MASK 0x00000040 /* Read back Mask */
|
||||
#define XHI_SR_IN_ABORT_N_MASK 0x00000020 /* Select Map Abort Mask */
|
||||
#define XHI_SR_DONE_MASK 0x00000001 /* Done bit Mask */
|
||||
|
||||
|
||||
#define XHI_WFO_MAX_VACANCY 1024 /* Max Write FIFO Vacancy, in words */
|
||||
#define XHI_RFO_MAX_OCCUPANCY 256 /* Max Read FIFO Occupancy, in words */
|
||||
/* The maximum amount we can request from fifo_icap_get_configuration
|
||||
at once, in bytes. */
|
||||
#define XHI_MAX_READ_TRANSACTION_WORDS 0xFFF
|
||||
|
||||
|
||||
/**
|
||||
* fifo_icap_fifo_write: Write data to the write FIFO.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter data: the 32-bit value to be written to the FIFO.
|
||||
*
|
||||
* This function will silently fail if the fifo is full.
|
||||
**/
|
||||
static inline void fifo_icap_fifo_write(struct hwicap_drvdata *drvdata,
|
||||
u32 data)
|
||||
{
|
||||
dev_dbg(drvdata->dev, "fifo_write: %x\n", data);
|
||||
out_be32(drvdata->base_address + XHI_WF_OFFSET, data);
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_fifo_read: Read data from the Read FIFO.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* This function will silently fail if the fifo is empty.
|
||||
**/
|
||||
static inline u32 fifo_icap_fifo_read(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
u32 data = in_be32(drvdata->base_address + XHI_RF_OFFSET);
|
||||
dev_dbg(drvdata->dev, "fifo_read: %x\n", data);
|
||||
return data;
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_set_read_size: Set the the size register.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter data: the size of the following read transaction, in words.
|
||||
**/
|
||||
static inline void fifo_icap_set_read_size(struct hwicap_drvdata *drvdata,
|
||||
u32 data)
|
||||
{
|
||||
out_be32(drvdata->base_address + XHI_SZ_OFFSET, data);
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_start_config: Initiate a configuration (write) to the device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
**/
|
||||
static inline void fifo_icap_start_config(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
out_be32(drvdata->base_address + XHI_CR_OFFSET, XHI_CR_WRITE_MASK);
|
||||
dev_dbg(drvdata->dev, "configuration started\n");
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_start_readback: Initiate a readback from the device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
**/
|
||||
static inline void fifo_icap_start_readback(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
out_be32(drvdata->base_address + XHI_CR_OFFSET, XHI_CR_READ_MASK);
|
||||
dev_dbg(drvdata->dev, "readback started\n");
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_busy: Return true if the ICAP is still processing a transaction.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
**/
|
||||
static inline u32 fifo_icap_busy(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
u32 status = in_be32(drvdata->base_address + XHI_SR_OFFSET);
|
||||
dev_dbg(drvdata->dev, "Getting status = %x\n", status);
|
||||
return (status & XHI_SR_DONE_MASK) ? 0 : 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_write_fifo_vacancy: Query the write fifo available space.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* Return the number of words that can be safely pushed into the write fifo.
|
||||
**/
|
||||
static inline u32 fifo_icap_write_fifo_vacancy(
|
||||
struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
return in_be32(drvdata->base_address + XHI_WFV_OFFSET);
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_read_fifo_occupancy: Query the read fifo available data.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* Return the number of words that can be safely read from the read fifo.
|
||||
**/
|
||||
static inline u32 fifo_icap_read_fifo_occupancy(
|
||||
struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
return in_be32(drvdata->base_address + XHI_RFO_OFFSET);
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_set_configuration: Send configuration data to the ICAP.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter frame_buffer: a pointer to the data to be written to the
|
||||
* ICAP device.
|
||||
* @parameter num_words: the number of words (32 bit) to write to the ICAP
|
||||
* device.
|
||||
|
||||
* This function writes the given user data to the Write FIFO in
|
||||
* polled mode and starts the transfer of the data to
|
||||
* the ICAP device.
|
||||
**/
|
||||
int fifo_icap_set_configuration(struct hwicap_drvdata *drvdata,
|
||||
u32 *frame_buffer, u32 num_words)
|
||||
{
|
||||
|
||||
u32 write_fifo_vacancy = 0;
|
||||
u32 retries = 0;
|
||||
u32 remaining_words;
|
||||
|
||||
dev_dbg(drvdata->dev, "fifo_set_configuration\n");
|
||||
|
||||
/*
|
||||
* Check if the ICAP device is Busy with the last Read/Write
|
||||
*/
|
||||
if (fifo_icap_busy(drvdata))
|
||||
return -EBUSY;
|
||||
|
||||
/*
|
||||
* Set up the buffer pointer and the words to be transferred.
|
||||
*/
|
||||
remaining_words = num_words;
|
||||
|
||||
while (remaining_words > 0) {
|
||||
/*
|
||||
* Wait until we have some data in the fifo.
|
||||
*/
|
||||
while (write_fifo_vacancy == 0) {
|
||||
write_fifo_vacancy =
|
||||
fifo_icap_write_fifo_vacancy(drvdata);
|
||||
retries++;
|
||||
if (retries > XHI_MAX_RETRIES)
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/*
|
||||
* Write data into the Write FIFO.
|
||||
*/
|
||||
while ((write_fifo_vacancy != 0) &&
|
||||
(remaining_words > 0)) {
|
||||
fifo_icap_fifo_write(drvdata, *frame_buffer);
|
||||
|
||||
remaining_words--;
|
||||
write_fifo_vacancy--;
|
||||
frame_buffer++;
|
||||
}
|
||||
/* Start pushing whatever is in the FIFO into the ICAP. */
|
||||
fifo_icap_start_config(drvdata);
|
||||
}
|
||||
|
||||
/* Wait until the write has finished. */
|
||||
while (fifo_icap_busy(drvdata)) {
|
||||
retries++;
|
||||
if (retries > XHI_MAX_RETRIES)
|
||||
break;
|
||||
}
|
||||
|
||||
dev_dbg(drvdata->dev, "done fifo_set_configuration\n");
|
||||
|
||||
/*
|
||||
* If the requested number of words have not been read from
|
||||
* the device then indicate failure.
|
||||
*/
|
||||
if (remaining_words != 0)
|
||||
return -EIO;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_get_configuration: Read configuration data from the device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter data: Address of the data representing the partial bitstream
|
||||
* @parameter size: the size of the partial bitstream in 32 bit words.
|
||||
*
|
||||
* This function reads the specified number of words from the ICAP device in
|
||||
* the polled mode.
|
||||
*/
|
||||
int fifo_icap_get_configuration(struct hwicap_drvdata *drvdata,
|
||||
u32 *frame_buffer, u32 num_words)
|
||||
{
|
||||
|
||||
u32 read_fifo_occupancy = 0;
|
||||
u32 retries = 0;
|
||||
u32 *data = frame_buffer;
|
||||
u32 remaining_words;
|
||||
u32 words_to_read;
|
||||
|
||||
dev_dbg(drvdata->dev, "fifo_get_configuration\n");
|
||||
|
||||
/*
|
||||
* Check if the ICAP device is Busy with the last Write/Read
|
||||
*/
|
||||
if (fifo_icap_busy(drvdata))
|
||||
return -EBUSY;
|
||||
|
||||
remaining_words = num_words;
|
||||
|
||||
while (remaining_words > 0) {
|
||||
words_to_read = remaining_words;
|
||||
/* The hardware has a limit on the number of words
|
||||
that can be read at one time. */
|
||||
if (words_to_read > XHI_MAX_READ_TRANSACTION_WORDS)
|
||||
words_to_read = XHI_MAX_READ_TRANSACTION_WORDS;
|
||||
|
||||
remaining_words -= words_to_read;
|
||||
|
||||
fifo_icap_set_read_size(drvdata, words_to_read);
|
||||
fifo_icap_start_readback(drvdata);
|
||||
|
||||
while (words_to_read > 0) {
|
||||
/* Wait until we have some data in the fifo. */
|
||||
while (read_fifo_occupancy == 0) {
|
||||
read_fifo_occupancy =
|
||||
fifo_icap_read_fifo_occupancy(drvdata);
|
||||
retries++;
|
||||
if (retries > XHI_MAX_RETRIES)
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
if (read_fifo_occupancy > words_to_read)
|
||||
read_fifo_occupancy = words_to_read;
|
||||
|
||||
words_to_read -= read_fifo_occupancy;
|
||||
|
||||
/* Read the data from the Read FIFO. */
|
||||
while (read_fifo_occupancy != 0) {
|
||||
*data++ = fifo_icap_fifo_read(drvdata);
|
||||
read_fifo_occupancy--;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
dev_dbg(drvdata->dev, "done fifo_get_configuration\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* buffer_icap_reset: Reset the logic of the icap device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* This function forces the software reset of the complete HWICAP device.
|
||||
* All the registers will return to the default value and the FIFO is also
|
||||
* flushed as a part of this software reset.
|
||||
*/
|
||||
void fifo_icap_reset(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
u32 reg_data;
|
||||
/*
|
||||
* Reset the device by setting/clearing the RESET bit in the
|
||||
* Control Register.
|
||||
*/
|
||||
reg_data = in_be32(drvdata->base_address + XHI_CR_OFFSET);
|
||||
|
||||
out_be32(drvdata->base_address + XHI_CR_OFFSET,
|
||||
reg_data | XHI_CR_SW_RESET_MASK);
|
||||
|
||||
out_be32(drvdata->base_address + XHI_CR_OFFSET,
|
||||
reg_data & (~XHI_CR_SW_RESET_MASK));
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* fifo_icap_flush_fifo: This function flushes the FIFOs in the device.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*/
|
||||
void fifo_icap_flush_fifo(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
u32 reg_data;
|
||||
/*
|
||||
* Flush the FIFO by setting/clearing the FIFO Clear bit in the
|
||||
* Control Register.
|
||||
*/
|
||||
reg_data = in_be32(drvdata->base_address + XHI_CR_OFFSET);
|
||||
|
||||
out_be32(drvdata->base_address + XHI_CR_OFFSET,
|
||||
reg_data | XHI_CR_FIFO_CLR_MASK);
|
||||
|
||||
out_be32(drvdata->base_address + XHI_CR_OFFSET,
|
||||
reg_data & (~XHI_CR_FIFO_CLR_MASK));
|
||||
}
|
||||
|
||||
62
drivers/char/xilinx_hwicap/fifo_icap.h
Normal file
62
drivers/char/xilinx_hwicap/fifo_icap.h
Normal file
@ -0,0 +1,62 @@
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Author: Xilinx, 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.
|
||||
*
|
||||
* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
|
||||
* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
|
||||
* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
|
||||
* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
|
||||
* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
|
||||
* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
|
||||
* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
|
||||
* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
|
||||
* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
|
||||
* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
|
||||
* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
|
||||
* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Xilinx products are not intended for use in life support appliances,
|
||||
* devices, or systems. Use in such applications is expressly prohibited.
|
||||
*
|
||||
* (c) Copyright 2007-2008 Xilinx Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef XILINX_FIFO_ICAP_H_ /* prevent circular inclusions */
|
||||
#define XILINX_FIFO_ICAP_H_ /* by using protection macros */
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include "xilinx_hwicap.h"
|
||||
|
||||
/* Reads integers from the device into the storage buffer. */
|
||||
int fifo_icap_get_configuration(
|
||||
struct hwicap_drvdata *drvdata,
|
||||
u32 *FrameBuffer,
|
||||
u32 NumWords);
|
||||
|
||||
/* Writes integers to the device from the storage buffer. */
|
||||
int fifo_icap_set_configuration(
|
||||
struct hwicap_drvdata *drvdata,
|
||||
u32 *FrameBuffer,
|
||||
u32 NumWords);
|
||||
|
||||
void fifo_icap_reset(struct hwicap_drvdata *drvdata);
|
||||
void fifo_icap_flush_fifo(struct hwicap_drvdata *drvdata);
|
||||
|
||||
#endif
|
||||
904
drivers/char/xilinx_hwicap/xilinx_hwicap.c
Normal file
904
drivers/char/xilinx_hwicap/xilinx_hwicap.c
Normal file
@ -0,0 +1,904 @@
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Author: Xilinx, 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.
|
||||
*
|
||||
* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
|
||||
* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
|
||||
* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
|
||||
* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
|
||||
* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
|
||||
* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
|
||||
* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
|
||||
* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
|
||||
* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
|
||||
* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
|
||||
* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
|
||||
* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Xilinx products are not intended for use in life support appliances,
|
||||
* devices, or systems. Use in such applications is expressly prohibited.
|
||||
*
|
||||
* (c) Copyright 2002 Xilinx Inc., Systems Engineering Group
|
||||
* (c) Copyright 2004 Xilinx Inc., Systems Engineering Group
|
||||
* (c) Copyright 2007-2008 Xilinx Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
/*
|
||||
* This is the code behind /dev/xilinx_icap -- it allows a user-space
|
||||
* application to use the Xilinx ICAP subsystem.
|
||||
*
|
||||
* The following operations are possible:
|
||||
*
|
||||
* open open the port and initialize for access.
|
||||
* release release port
|
||||
* write Write a bitstream to the configuration processor.
|
||||
* read Read a data stream from the configuration processor.
|
||||
*
|
||||
* After being opened, the port is initialized and accessed to avoid a
|
||||
* corrupted first read which may occur with some hardware. The port
|
||||
* is left in a desynched state, requiring that a synch sequence be
|
||||
* transmitted before any valid configuration data. A user will have
|
||||
* exclusive access to the device while it remains open, and the state
|
||||
* of the ICAP cannot be guaranteed after the device is closed. Note
|
||||
* that a complete reset of the core and the state of the ICAP cannot
|
||||
* be performed on many versions of the cores, hence users of this
|
||||
* device should avoid making inconsistent accesses to the device. In
|
||||
* particular, accessing the read interface, without first generating
|
||||
* a write containing a readback packet can leave the ICAP in an
|
||||
* inaccessible state.
|
||||
*
|
||||
* Note that in order to use the read interface, it is first necessary
|
||||
* to write a request packet to the write interface. i.e., it is not
|
||||
* possible to simply readback the bitstream (or any configuration
|
||||
* bits) from a device without specifically requesting them first.
|
||||
* The code to craft such packets is intended to be part of the
|
||||
* user-space application code that uses this device. The simplest
|
||||
* way to use this interface is simply:
|
||||
*
|
||||
* cp foo.bit /dev/xilinx_icap
|
||||
*
|
||||
* Note that unless foo.bit is an appropriately constructed partial
|
||||
* bitstream, this has a high likelyhood of overwriting the design
|
||||
* currently programmed in the FPGA.
|
||||
*/
|
||||
|
||||
#include <linux/version.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/fcntl.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/poll.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <asm/semaphore.h>
|
||||
#include <linux/sysctl.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <asm/system.h>
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
/* For open firmware. */
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/of_platform.h>
|
||||
#endif
|
||||
|
||||
#include "xilinx_hwicap.h"
|
||||
#include "buffer_icap.h"
|
||||
#include "fifo_icap.h"
|
||||
|
||||
#define DRIVER_NAME "xilinx_icap"
|
||||
|
||||
#define HWICAP_REGS (0x10000)
|
||||
|
||||
/* dynamically allocate device number */
|
||||
static int xhwicap_major;
|
||||
static int xhwicap_minor;
|
||||
#define HWICAP_DEVICES 1
|
||||
|
||||
module_param(xhwicap_major, int, S_IRUGO);
|
||||
module_param(xhwicap_minor, int, S_IRUGO);
|
||||
|
||||
/* An array, which is set to true when the device is registered. */
|
||||
static bool probed_devices[HWICAP_DEVICES];
|
||||
|
||||
static struct class *icap_class;
|
||||
|
||||
#define UNIMPLEMENTED 0xFFFF
|
||||
|
||||
static const struct config_registers v2_config_registers = {
|
||||
.CRC = 0,
|
||||
.FAR = 1,
|
||||
.FDRI = 2,
|
||||
.FDRO = 3,
|
||||
.CMD = 4,
|
||||
.CTL = 5,
|
||||
.MASK = 6,
|
||||
.STAT = 7,
|
||||
.LOUT = 8,
|
||||
.COR = 9,
|
||||
.MFWR = 10,
|
||||
.FLR = 11,
|
||||
.KEY = 12,
|
||||
.CBC = 13,
|
||||
.IDCODE = 14,
|
||||
.AXSS = UNIMPLEMENTED,
|
||||
.C0R_1 = UNIMPLEMENTED,
|
||||
.CSOB = UNIMPLEMENTED,
|
||||
.WBSTAR = UNIMPLEMENTED,
|
||||
.TIMER = UNIMPLEMENTED,
|
||||
.BOOTSTS = UNIMPLEMENTED,
|
||||
.CTL_1 = UNIMPLEMENTED,
|
||||
};
|
||||
|
||||
static const struct config_registers v4_config_registers = {
|
||||
.CRC = 0,
|
||||
.FAR = 1,
|
||||
.FDRI = 2,
|
||||
.FDRO = 3,
|
||||
.CMD = 4,
|
||||
.CTL = 5,
|
||||
.MASK = 6,
|
||||
.STAT = 7,
|
||||
.LOUT = 8,
|
||||
.COR = 9,
|
||||
.MFWR = 10,
|
||||
.FLR = UNIMPLEMENTED,
|
||||
.KEY = UNIMPLEMENTED,
|
||||
.CBC = 11,
|
||||
.IDCODE = 12,
|
||||
.AXSS = 13,
|
||||
.C0R_1 = UNIMPLEMENTED,
|
||||
.CSOB = UNIMPLEMENTED,
|
||||
.WBSTAR = UNIMPLEMENTED,
|
||||
.TIMER = UNIMPLEMENTED,
|
||||
.BOOTSTS = UNIMPLEMENTED,
|
||||
.CTL_1 = UNIMPLEMENTED,
|
||||
};
|
||||
static const struct config_registers v5_config_registers = {
|
||||
.CRC = 0,
|
||||
.FAR = 1,
|
||||
.FDRI = 2,
|
||||
.FDRO = 3,
|
||||
.CMD = 4,
|
||||
.CTL = 5,
|
||||
.MASK = 6,
|
||||
.STAT = 7,
|
||||
.LOUT = 8,
|
||||
.COR = 9,
|
||||
.MFWR = 10,
|
||||
.FLR = UNIMPLEMENTED,
|
||||
.KEY = UNIMPLEMENTED,
|
||||
.CBC = 11,
|
||||
.IDCODE = 12,
|
||||
.AXSS = 13,
|
||||
.C0R_1 = 14,
|
||||
.CSOB = 15,
|
||||
.WBSTAR = 16,
|
||||
.TIMER = 17,
|
||||
.BOOTSTS = 18,
|
||||
.CTL_1 = 19,
|
||||
};
|
||||
|
||||
/**
|
||||
* hwicap_command_desync: Send a DESYNC command to the ICAP port.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* This command desynchronizes the ICAP After this command, a
|
||||
* bitstream containing a NULL packet, followed by a SYNCH packet is
|
||||
* required before the ICAP will recognize commands.
|
||||
*/
|
||||
int hwicap_command_desync(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
u32 buffer[4];
|
||||
u32 index = 0;
|
||||
|
||||
/*
|
||||
* Create the data to be written to the ICAP.
|
||||
*/
|
||||
buffer[index++] = hwicap_type_1_write(drvdata->config_regs->CMD) | 1;
|
||||
buffer[index++] = XHI_CMD_DESYNCH;
|
||||
buffer[index++] = XHI_NOOP_PACKET;
|
||||
buffer[index++] = XHI_NOOP_PACKET;
|
||||
|
||||
/*
|
||||
* Write the data to the FIFO and intiate the transfer of data present
|
||||
* in the FIFO to the ICAP device.
|
||||
*/
|
||||
return drvdata->config->set_configuration(drvdata,
|
||||
&buffer[0], index);
|
||||
}
|
||||
|
||||
/**
|
||||
* hwicap_command_capture: Send a CAPTURE command to the ICAP port.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
*
|
||||
* This command captures all of the flip flop states so they will be
|
||||
* available during readback. One can use this command instead of
|
||||
* enabling the CAPTURE block in the design.
|
||||
*/
|
||||
int hwicap_command_capture(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
u32 buffer[7];
|
||||
u32 index = 0;
|
||||
|
||||
/*
|
||||
* Create the data to be written to the ICAP.
|
||||
*/
|
||||
buffer[index++] = XHI_DUMMY_PACKET;
|
||||
buffer[index++] = XHI_SYNC_PACKET;
|
||||
buffer[index++] = XHI_NOOP_PACKET;
|
||||
buffer[index++] = hwicap_type_1_write(drvdata->config_regs->CMD) | 1;
|
||||
buffer[index++] = XHI_CMD_GCAPTURE;
|
||||
buffer[index++] = XHI_DUMMY_PACKET;
|
||||
buffer[index++] = XHI_DUMMY_PACKET;
|
||||
|
||||
/*
|
||||
* Write the data to the FIFO and intiate the transfer of data
|
||||
* present in the FIFO to the ICAP device.
|
||||
*/
|
||||
return drvdata->config->set_configuration(drvdata,
|
||||
&buffer[0], index);
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* hwicap_get_configuration_register: Query a configuration register.
|
||||
* @parameter drvdata: a pointer to the drvdata.
|
||||
* @parameter reg: a constant which represents the configuration
|
||||
* register value to be returned.
|
||||
* Examples: XHI_IDCODE, XHI_FLR.
|
||||
* @parameter RegData: returns the value of the register.
|
||||
*
|
||||
* Sends a query packet to the ICAP and then receives the response.
|
||||
* The icap is left in Synched state.
|
||||
*/
|
||||
int hwicap_get_configuration_register(struct hwicap_drvdata *drvdata,
|
||||
u32 reg, u32 *RegData)
|
||||
{
|
||||
int status;
|
||||
u32 buffer[6];
|
||||
u32 index = 0;
|
||||
|
||||
/*
|
||||
* Create the data to be written to the ICAP.
|
||||
*/
|
||||
buffer[index++] = XHI_DUMMY_PACKET;
|
||||
buffer[index++] = XHI_SYNC_PACKET;
|
||||
buffer[index++] = XHI_NOOP_PACKET;
|
||||
buffer[index++] = hwicap_type_1_read(reg) | 1;
|
||||
buffer[index++] = XHI_NOOP_PACKET;
|
||||
buffer[index++] = XHI_NOOP_PACKET;
|
||||
|
||||
/*
|
||||
* Write the data to the FIFO and intiate the transfer of data present
|
||||
* in the FIFO to the ICAP device.
|
||||
*/
|
||||
status = drvdata->config->set_configuration(drvdata,
|
||||
&buffer[0], index);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
/*
|
||||
* Read the configuration register
|
||||
*/
|
||||
status = drvdata->config->get_configuration(drvdata, RegData, 1);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hwicap_initialize_hwicap(struct hwicap_drvdata *drvdata)
|
||||
{
|
||||
int status;
|
||||
u32 idcode;
|
||||
|
||||
dev_dbg(drvdata->dev, "initializing\n");
|
||||
|
||||
/* Abort any current transaction, to make sure we have the
|
||||
* ICAP in a good state. */
|
||||
dev_dbg(drvdata->dev, "Reset...\n");
|
||||
drvdata->config->reset(drvdata);
|
||||
|
||||
dev_dbg(drvdata->dev, "Desync...\n");
|
||||
status = hwicap_command_desync(drvdata);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
/* Attempt to read the IDCODE from ICAP. This
|
||||
* may not be returned correctly, due to the design of the
|
||||
* hardware.
|
||||
*/
|
||||
dev_dbg(drvdata->dev, "Reading IDCODE...\n");
|
||||
status = hwicap_get_configuration_register(
|
||||
drvdata, drvdata->config_regs->IDCODE, &idcode);
|
||||
dev_dbg(drvdata->dev, "IDCODE = %x\n", idcode);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
dev_dbg(drvdata->dev, "Desync...\n");
|
||||
status = hwicap_command_desync(drvdata);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
hwicap_read(struct file *file, char *buf, size_t count, loff_t *ppos)
|
||||
{
|
||||
struct hwicap_drvdata *drvdata = file->private_data;
|
||||
ssize_t bytes_to_read = 0;
|
||||
u32 *kbuf;
|
||||
u32 words;
|
||||
u32 bytes_remaining;
|
||||
int status;
|
||||
|
||||
if (down_interruptible(&drvdata->sem))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
if (drvdata->read_buffer_in_use) {
|
||||
/* If there are leftover bytes in the buffer, just */
|
||||
/* return them and don't try to read more from the */
|
||||
/* ICAP device. */
|
||||
bytes_to_read =
|
||||
(count < drvdata->read_buffer_in_use) ? count :
|
||||
drvdata->read_buffer_in_use;
|
||||
|
||||
/* Return the data currently in the read buffer. */
|
||||
if (copy_to_user(buf, drvdata->read_buffer, bytes_to_read)) {
|
||||
status = -EFAULT;
|
||||
goto error;
|
||||
}
|
||||
drvdata->read_buffer_in_use -= bytes_to_read;
|
||||
memcpy(drvdata->read_buffer + bytes_to_read,
|
||||
drvdata->read_buffer, 4 - bytes_to_read);
|
||||
} else {
|
||||
/* Get new data from the ICAP, and return was was requested. */
|
||||
kbuf = (u32 *) get_zeroed_page(GFP_KERNEL);
|
||||
if (!kbuf) {
|
||||
status = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* The ICAP device is only able to read complete */
|
||||
/* words. If a number of bytes that do not correspond */
|
||||
/* to complete words is requested, then we read enough */
|
||||
/* words to get the required number of bytes, and then */
|
||||
/* save the remaining bytes for the next read. */
|
||||
|
||||
/* Determine the number of words to read, rounding up */
|
||||
/* if necessary. */
|
||||
words = ((count + 3) >> 2);
|
||||
bytes_to_read = words << 2;
|
||||
|
||||
if (bytes_to_read > PAGE_SIZE)
|
||||
bytes_to_read = PAGE_SIZE;
|
||||
|
||||
/* Ensure we only read a complete number of words. */
|
||||
bytes_remaining = bytes_to_read & 3;
|
||||
bytes_to_read &= ~3;
|
||||
words = bytes_to_read >> 2;
|
||||
|
||||
status = drvdata->config->get_configuration(drvdata,
|
||||
kbuf, words);
|
||||
|
||||
/* If we didn't read correctly, then bail out. */
|
||||
if (status) {
|
||||
free_page((unsigned long)kbuf);
|
||||
goto error;
|
||||
}
|
||||
|
||||
/* If we fail to return the data to the user, then bail out. */
|
||||
if (copy_to_user(buf, kbuf, bytes_to_read)) {
|
||||
free_page((unsigned long)kbuf);
|
||||
status = -EFAULT;
|
||||
goto error;
|
||||
}
|
||||
memcpy(kbuf, drvdata->read_buffer, bytes_remaining);
|
||||
drvdata->read_buffer_in_use = bytes_remaining;
|
||||
free_page((unsigned long)kbuf);
|
||||
}
|
||||
status = bytes_to_read;
|
||||
error:
|
||||
up(&drvdata->sem);
|
||||
return status;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
hwicap_write(struct file *file, const char *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
struct hwicap_drvdata *drvdata = file->private_data;
|
||||
ssize_t written = 0;
|
||||
ssize_t left = count;
|
||||
u32 *kbuf;
|
||||
ssize_t len;
|
||||
ssize_t status;
|
||||
|
||||
if (down_interruptible(&drvdata->sem))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
left += drvdata->write_buffer_in_use;
|
||||
|
||||
/* Only write multiples of 4 bytes. */
|
||||
if (left < 4) {
|
||||
status = 0;
|
||||
goto error;
|
||||
}
|
||||
|
||||
kbuf = (u32 *) __get_free_page(GFP_KERNEL);
|
||||
if (!kbuf) {
|
||||
status = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
while (left > 3) {
|
||||
/* only write multiples of 4 bytes, so there might */
|
||||
/* be as many as 3 bytes left (at the end). */
|
||||
len = left;
|
||||
|
||||
if (len > PAGE_SIZE)
|
||||
len = PAGE_SIZE;
|
||||
len &= ~3;
|
||||
|
||||
if (drvdata->write_buffer_in_use) {
|
||||
memcpy(kbuf, drvdata->write_buffer,
|
||||
drvdata->write_buffer_in_use);
|
||||
if (copy_from_user(
|
||||
(((char *)kbuf) + (drvdata->write_buffer_in_use)),
|
||||
buf + written,
|
||||
len - (drvdata->write_buffer_in_use))) {
|
||||
free_page((unsigned long)kbuf);
|
||||
status = -EFAULT;
|
||||
goto error;
|
||||
}
|
||||
} else {
|
||||
if (copy_from_user(kbuf, buf + written, len)) {
|
||||
free_page((unsigned long)kbuf);
|
||||
status = -EFAULT;
|
||||
goto error;
|
||||
}
|
||||
}
|
||||
|
||||
status = drvdata->config->set_configuration(drvdata,
|
||||
kbuf, len >> 2);
|
||||
|
||||
if (status) {
|
||||
free_page((unsigned long)kbuf);
|
||||
status = -EFAULT;
|
||||
goto error;
|
||||
}
|
||||
if (drvdata->write_buffer_in_use) {
|
||||
len -= drvdata->write_buffer_in_use;
|
||||
left -= drvdata->write_buffer_in_use;
|
||||
drvdata->write_buffer_in_use = 0;
|
||||
}
|
||||
written += len;
|
||||
left -= len;
|
||||
}
|
||||
if ((left > 0) && (left < 4)) {
|
||||
if (!copy_from_user(drvdata->write_buffer,
|
||||
buf + written, left)) {
|
||||
drvdata->write_buffer_in_use = left;
|
||||
written += left;
|
||||
left = 0;
|
||||
}
|
||||
}
|
||||
|
||||
free_page((unsigned long)kbuf);
|
||||
status = written;
|
||||
error:
|
||||
up(&drvdata->sem);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int hwicap_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct hwicap_drvdata *drvdata;
|
||||
int status;
|
||||
|
||||
drvdata = container_of(inode->i_cdev, struct hwicap_drvdata, cdev);
|
||||
|
||||
if (down_interruptible(&drvdata->sem))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
if (drvdata->is_open) {
|
||||
status = -EBUSY;
|
||||
goto error;
|
||||
}
|
||||
|
||||
status = hwicap_initialize_hwicap(drvdata);
|
||||
if (status) {
|
||||
dev_err(drvdata->dev, "Failed to open file");
|
||||
goto error;
|
||||
}
|
||||
|
||||
file->private_data = drvdata;
|
||||
drvdata->write_buffer_in_use = 0;
|
||||
drvdata->read_buffer_in_use = 0;
|
||||
drvdata->is_open = 1;
|
||||
|
||||
error:
|
||||
up(&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;
|
||||
|
||||
if (down_interruptible(&drvdata->sem))
|
||||
return -ERESTARTSYS;
|
||||
|
||||
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;
|
||||
up(&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");
|
||||
|
||||
if (id < 0) {
|
||||
for (id = 0; id < HWICAP_DEVICES; id++)
|
||||
if (!probed_devices[id])
|
||||
break;
|
||||
}
|
||||
if (id < 0 || id >= HWICAP_DEVICES) {
|
||||
dev_err(dev, "%s%i too large\n", DRIVER_NAME, id);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (probed_devices[id]) {
|
||||
dev_err(dev, "cannot assign to %s%i; it is already in use\n",
|
||||
DRIVER_NAME, id);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
probed_devices[id] = 1;
|
||||
|
||||
devt = MKDEV(xhwicap_major, xhwicap_minor + id);
|
||||
|
||||
drvdata = kmalloc(sizeof(struct hwicap_drvdata), GFP_KERNEL);
|
||||
if (!drvdata) {
|
||||
dev_err(dev, "Couldn't allocate device private record\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
memset((void *)drvdata, 0, sizeof(struct hwicap_drvdata));
|
||||
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;
|
||||
|
||||
init_MUTEX(&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); */
|
||||
class_device_create(icap_class, NULL, devt, NULL, DRIVER_NAME);
|
||||
return 0; /* success */
|
||||
|
||||
failed3:
|
||||
iounmap(drvdata->base_address);
|
||||
|
||||
failed2:
|
||||
release_mem_region(regs_res->start, drvdata->mem_size);
|
||||
|
||||
failed1:
|
||||
kfree(drvdata);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static struct hwicap_driver_config buffer_icap_config = {
|
||||
.get_configuration = buffer_icap_get_configuration,
|
||||
.set_configuration = buffer_icap_set_configuration,
|
||||
.reset = buffer_icap_reset,
|
||||
};
|
||||
|
||||
static struct hwicap_driver_config fifo_icap_config = {
|
||||
.get_configuration = fifo_icap_get_configuration,
|
||||
.set_configuration = fifo_icap_set_configuration,
|
||||
.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;
|
||||
|
||||
class_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);
|
||||
probed_devices[MINOR(dev->devt)-xhwicap_minor] = 0;
|
||||
|
||||
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 __devinit hwicap_of_register(void)
|
||||
{
|
||||
pr_debug("hwicap: calling of_register_platform_driver()\n");
|
||||
return of_register_platform_driver(&hwicap_of_driver);
|
||||
}
|
||||
|
||||
static inline void __devexit hwicap_of_unregister(void)
|
||||
{
|
||||
of_unregister_platform_driver(&hwicap_of_driver);
|
||||
}
|
||||
#else /* CONFIG_OF */
|
||||
/* CONFIG_OF not enabled; do nothing helpers */
|
||||
static inline int __devinit hwicap_of_register(void) { return 0; }
|
||||
static inline void __devexit hwicap_of_unregister(void) { }
|
||||
#endif /* CONFIG_OF */
|
||||
|
||||
static int __devinit hwicap_module_init(void)
|
||||
{
|
||||
dev_t devt;
|
||||
int retval;
|
||||
|
||||
icap_class = class_create(THIS_MODULE, "xilinx_config");
|
||||
|
||||
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 __devexit 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");
|
||||
193
drivers/char/xilinx_hwicap/xilinx_hwicap.h
Normal file
193
drivers/char/xilinx_hwicap/xilinx_hwicap.h
Normal file
@ -0,0 +1,193 @@
|
||||
/*****************************************************************************
|
||||
*
|
||||
* Author: Xilinx, 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.
|
||||
*
|
||||
* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
|
||||
* AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
|
||||
* SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
|
||||
* OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
|
||||
* APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
|
||||
* THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
|
||||
* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
|
||||
* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
|
||||
* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
|
||||
* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
|
||||
* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
|
||||
* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Xilinx products are not intended for use in life support appliances,
|
||||
* devices, or systems. Use in such applications is expressly prohibited.
|
||||
*
|
||||
* (c) Copyright 2003-2007 Xilinx Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef XILINX_HWICAP_H_ /* prevent circular inclusions */
|
||||
#define XILINX_HWICAP_H_ /* by using protection macros */
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
|
||||
struct hwicap_drvdata {
|
||||
u32 write_buffer_in_use; /* Always in [0,3] */
|
||||
u8 write_buffer[4];
|
||||
u32 read_buffer_in_use; /* Always in [0,3] */
|
||||
u8 read_buffer[4];
|
||||
u32 mem_start; /* phys. address of the control registers */
|
||||
u32 mem_end; /* phys. address of the control registers */
|
||||
u32 mem_size;
|
||||
void __iomem *base_address;/* virt. address of the control registers */
|
||||
|
||||
struct device *dev;
|
||||
struct cdev cdev; /* Char device structure */
|
||||
dev_t devt;
|
||||
|
||||
const struct hwicap_driver_config *config;
|
||||
const struct config_registers *config_regs;
|
||||
void *private_data;
|
||||
bool is_open;
|
||||
struct semaphore sem;
|
||||
};
|
||||
|
||||
struct hwicap_driver_config {
|
||||
int (*get_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
|
||||
u32 size);
|
||||
int (*set_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
|
||||
u32 size);
|
||||
void (*reset)(struct hwicap_drvdata *drvdata);
|
||||
};
|
||||
|
||||
/* Number of times to poll the done regsiter */
|
||||
#define XHI_MAX_RETRIES 10
|
||||
|
||||
/************ Constant Definitions *************/
|
||||
|
||||
#define XHI_PAD_FRAMES 0x1
|
||||
|
||||
/* Mask for calculating configuration packet headers */
|
||||
#define XHI_WORD_COUNT_MASK_TYPE_1 0x7FFUL
|
||||
#define XHI_WORD_COUNT_MASK_TYPE_2 0x1FFFFFUL
|
||||
#define XHI_TYPE_MASK 0x7
|
||||
#define XHI_REGISTER_MASK 0xF
|
||||
#define XHI_OP_MASK 0x3
|
||||
|
||||
#define XHI_TYPE_SHIFT 29
|
||||
#define XHI_REGISTER_SHIFT 13
|
||||
#define XHI_OP_SHIFT 27
|
||||
|
||||
#define XHI_TYPE_1 1
|
||||
#define XHI_TYPE_2 2
|
||||
#define XHI_OP_WRITE 2
|
||||
#define XHI_OP_READ 1
|
||||
|
||||
/* Address Block Types */
|
||||
#define XHI_FAR_CLB_BLOCK 0
|
||||
#define XHI_FAR_BRAM_BLOCK 1
|
||||
#define XHI_FAR_BRAM_INT_BLOCK 2
|
||||
|
||||
struct config_registers {
|
||||
u32 CRC;
|
||||
u32 FAR;
|
||||
u32 FDRI;
|
||||
u32 FDRO;
|
||||
u32 CMD;
|
||||
u32 CTL;
|
||||
u32 MASK;
|
||||
u32 STAT;
|
||||
u32 LOUT;
|
||||
u32 COR;
|
||||
u32 MFWR;
|
||||
u32 FLR;
|
||||
u32 KEY;
|
||||
u32 CBC;
|
||||
u32 IDCODE;
|
||||
u32 AXSS;
|
||||
u32 C0R_1;
|
||||
u32 CSOB;
|
||||
u32 WBSTAR;
|
||||
u32 TIMER;
|
||||
u32 BOOTSTS;
|
||||
u32 CTL_1;
|
||||
};
|
||||
|
||||
/* Configuration Commands */
|
||||
#define XHI_CMD_NULL 0
|
||||
#define XHI_CMD_WCFG 1
|
||||
#define XHI_CMD_MFW 2
|
||||
#define XHI_CMD_DGHIGH 3
|
||||
#define XHI_CMD_RCFG 4
|
||||
#define XHI_CMD_START 5
|
||||
#define XHI_CMD_RCAP 6
|
||||
#define XHI_CMD_RCRC 7
|
||||
#define XHI_CMD_AGHIGH 8
|
||||
#define XHI_CMD_SWITCH 9
|
||||
#define XHI_CMD_GRESTORE 10
|
||||
#define XHI_CMD_SHUTDOWN 11
|
||||
#define XHI_CMD_GCAPTURE 12
|
||||
#define XHI_CMD_DESYNCH 13
|
||||
#define XHI_CMD_IPROG 15 /* Only in Virtex5 */
|
||||
#define XHI_CMD_CRCC 16 /* Only in Virtex5 */
|
||||
#define XHI_CMD_LTIMER 17 /* Only in Virtex5 */
|
||||
|
||||
/* Packet constants */
|
||||
#define XHI_SYNC_PACKET 0xAA995566UL
|
||||
#define XHI_DUMMY_PACKET 0xFFFFFFFFUL
|
||||
#define XHI_NOOP_PACKET (XHI_TYPE_1 << XHI_TYPE_SHIFT)
|
||||
#define XHI_TYPE_2_READ ((XHI_TYPE_2 << XHI_TYPE_SHIFT) | \
|
||||
(XHI_OP_READ << XHI_OP_SHIFT))
|
||||
|
||||
#define XHI_TYPE_2_WRITE ((XHI_TYPE_2 << XHI_TYPE_SHIFT) | \
|
||||
(XHI_OP_WRITE << XHI_OP_SHIFT))
|
||||
|
||||
#define XHI_TYPE2_CNT_MASK 0x07FFFFFF
|
||||
|
||||
#define XHI_TYPE_1_PACKET_MAX_WORDS 2047UL
|
||||
#define XHI_TYPE_1_HEADER_BYTES 4
|
||||
#define XHI_TYPE_2_HEADER_BYTES 8
|
||||
|
||||
/* Constant to use for CRC check when CRC has been disabled */
|
||||
#define XHI_DISABLED_AUTO_CRC 0x0000DEFCUL
|
||||
|
||||
/**
|
||||
* hwicap_type_1_read: Generates a Type 1 read packet header.
|
||||
* @parameter: Register is the address of the register to be read back.
|
||||
*
|
||||
* Generates a Type 1 read packet header, which is used to indirectly
|
||||
* read registers in the configuration logic. This packet must then
|
||||
* be sent through the icap device, and a return packet received with
|
||||
* the information.
|
||||
**/
|
||||
static inline u32 hwicap_type_1_read(u32 Register)
|
||||
{
|
||||
return (XHI_TYPE_1 << XHI_TYPE_SHIFT) |
|
||||
(Register << XHI_REGISTER_SHIFT) |
|
||||
(XHI_OP_READ << XHI_OP_SHIFT);
|
||||
}
|
||||
|
||||
/**
|
||||
* hwicap_type_1_write: Generates a Type 1 write packet header
|
||||
* @parameter: Register is the address of the register to be read back.
|
||||
**/
|
||||
static inline u32 hwicap_type_1_write(u32 Register)
|
||||
{
|
||||
return (XHI_TYPE_1 << XHI_TYPE_SHIFT) |
|
||||
(Register << XHI_REGISTER_SHIFT) |
|
||||
(XHI_OP_WRITE << XHI_OP_SHIFT);
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -17,10 +17,21 @@
|
||||
#include <linux/tty.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/init.h>
|
||||
#include <asm/io.h>
|
||||
#if defined(CONFIG_OF)
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/of_platform.h>
|
||||
|
||||
/* Match table for of_platform binding */
|
||||
static struct of_device_id ulite_of_match[] __devinitdata = {
|
||||
{ .compatible = "xlnx,opb-uartlite-1.00.b", },
|
||||
{ .compatible = "xlnx,xps-uartlite-1.00.a", },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ulite_of_match);
|
||||
|
||||
#endif
|
||||
|
||||
#define ULITE_NAME "ttyUL"
|
||||
@ -275,6 +286,9 @@ static void ulite_release_port(struct uart_port *port)
|
||||
|
||||
static int ulite_request_port(struct uart_port *port)
|
||||
{
|
||||
pr_debug("ulite console: port=%p; port->mapbase=%x\n",
|
||||
port, port->mapbase);
|
||||
|
||||
if (!request_mem_region(port->mapbase, ULITE_REGION, "uartlite")) {
|
||||
dev_err(port->dev, "Memory region busy\n");
|
||||
return -EBUSY;
|
||||
@ -375,32 +389,6 @@ static void ulite_console_write(struct console *co, const char *s,
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
}
|
||||
|
||||
#if defined(CONFIG_OF)
|
||||
static inline void __init ulite_console_of_find_device(int id)
|
||||
{
|
||||
struct device_node *np;
|
||||
struct resource res;
|
||||
const unsigned int *of_id;
|
||||
int rc;
|
||||
|
||||
for_each_compatible_node(np, NULL, "xilinx,uartlite") {
|
||||
of_id = of_get_property(np, "port-number", NULL);
|
||||
if ((!of_id) || (*of_id != id))
|
||||
continue;
|
||||
|
||||
rc = of_address_to_resource(np, 0, &res);
|
||||
if (rc)
|
||||
continue;
|
||||
|
||||
ulite_ports[id].mapbase = res.start;
|
||||
of_node_put(np);
|
||||
return;
|
||||
}
|
||||
}
|
||||
#else /* CONFIG_OF */
|
||||
static inline void __init ulite_console_of_find_device(int id) { /* do nothing */ }
|
||||
#endif /* CONFIG_OF */
|
||||
|
||||
static int __init ulite_console_setup(struct console *co, char *options)
|
||||
{
|
||||
struct uart_port *port;
|
||||
@ -414,11 +402,7 @@ static int __init ulite_console_setup(struct console *co, char *options)
|
||||
|
||||
port = &ulite_ports[co->index];
|
||||
|
||||
/* Check if it is an OF device */
|
||||
if (!port->mapbase)
|
||||
ulite_console_of_find_device(co->index);
|
||||
|
||||
/* Do we have a device now? */
|
||||
/* Has the device been initialized yet? */
|
||||
if (!port->mapbase) {
|
||||
pr_debug("console on ttyUL%i not present\n", co->index);
|
||||
return -ENODEV;
|
||||
@ -617,13 +601,6 @@ static int __devexit ulite_of_remove(struct of_device *op)
|
||||
return ulite_release(&op->dev);
|
||||
}
|
||||
|
||||
/* Match table for of_platform binding */
|
||||
static struct of_device_id __devinit ulite_of_match[] = {
|
||||
{ .type = "serial", .compatible = "xilinx,uartlite", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ulite_of_match);
|
||||
|
||||
static struct of_platform_driver ulite_of_driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "uartlite",
|
||||
|
||||
@ -459,8 +459,8 @@ static int __devexit xilinxfb_of_remove(struct of_device *op)
|
||||
}
|
||||
|
||||
/* Match table for of_platform binding */
|
||||
static struct of_device_id __devinit xilinxfb_of_match[] = {
|
||||
{ .compatible = "xilinx,ml300-fb", },
|
||||
static struct of_device_id xilinxfb_of_match[] __devinitdata = {
|
||||
{ .compatible = "xlnx,plb-tft-cntlr-ref-1.00.a", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, xilinxfb_of_match);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user