/*****************************************************************************
*
* 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.
*
* (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/platform_device.h>
#include <linux/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];
resource_size_t mem_start;/* phys. address of the control registers */
resource_size_t mem_end; /* phys. address of the control registers */
resource_size_t 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 mutex sem;
};
struct hwicap_driver_config {
/* Read configuration data given by size into the data buffer.
Return 0 if successful. */
int (*get_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
u32 size);
/* Write configuration data given by size from the data buffer.
Return 0 if successful. */
int (*set_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
u32 size);
/* Get the status register, bit pattern given by:
* D8 - 0 = configuration error
* D7 - 1 = alignment found
* D6 - 1 = readback in progress
* D5 - 0 = abort in progress
* D4 - Always 1
* D3 - Always 1
* D2 - Always 1
* D1 - Always 1
* D0 - 1 = operation completed
*/
u32 (*get_status)(struct hwicap_drvdata *drvdata);
/* Reset the hw */
void (*reset)(struct hwicap_drvdata *drvdata);
};
/* Number of times to poll the done register. This has to be large
* enough to allow an entire configuration to complete. If an entire
* page (4kb) is configured at once, that could take up to 4k cycles
* with a byte-wide icap interface. In most cases, this driver is
* used with a much smaller fifo, but this should be sufficient in the
* worst case.
*/
#define XHI_MAX_RETRIES 5000
/************ 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
/* Meanings of the bits returned by get_status */
#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 */
/**
* hwicap_type_1_read - Generates a Type 1 read packet header.
* @reg: 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 reg)
{
return (XHI_TYPE_1 << XHI_TYPE_SHIFT) |
(reg << XHI_REGISTER_SHIFT) |
(XHI_OP_READ << XHI_OP_SHIFT);
}
/**
* hwicap_type_1_write - Generates a Type 1 write packet header
* @reg: is the address of the register to be read back.
**/
static inline u32 hwicap_type_1_write(u32 reg)
{
return (XHI_TYPE_1 << XHI_TYPE_SHIFT) |
(reg << XHI_REGISTER_SHIFT) |
(XHI_OP_WRITE << XHI_OP_SHIFT);
}
#endif