kevin/linux
1
Fork 0
Code
3722bfc607
linux/drivers/char/xilinx_hwicap/xilinx_hwicap.h
Stephen Neuendorffer 6b06fdbaf9 [POWERPC] Xilinx: hwicap: Refactor status handling code. 
Both the buffer-based and fifo-based icap cores have a status
register.  Previously, this was only used internally to check whether
transactions have completed.  However, the status can be useful to the
main driver as well.  This patch exposes these status functions to the
main driver along with some masks for the differnet bits.

Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-03-26 07:27:11 -05:00

218 lines
7.0 KiB
C
Raw Blame History

/*****************************************************************************
*
* 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];
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 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
/* 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
View Git Blame Copy Permalink