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- /*
- * Hantro Decoder device driver (kernel module)
- *
- * Copyright (C) 2020 VeriSilicon Microelectronics Co., Ltd.
- *
- * 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.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- ------------------------------------------------------------------------------*/
- /*------------------------------------------------------------------------------
- Table of contents
- 1. Include headers
- 2. External compiler flags
- 3. Module defines
- ------------------------------------------------------------------------------*/
- /*------------------------------------------------------------------------------
- 1. Include headers
- ------------------------------------------------------------------------------*/
- #include <linux/io.h> /* for ioread32 and iowrite32 ... */
- #include "vcmdswhwregisters.h"
- /* NOTE: Don't use ',' in descriptions, because it is used as separator in csv
- * parsing. */
- const regVcmdField_s asicVcmdRegisterDesc[] =
- {
- #include "vcmdregistertable.h"
- };
- /*------------------------------------------------------------------------------
- 2. External compiler flags
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- 3. Module defines
- ------------------------------------------------------------------------------*/
- /* Define this to print debug info for every register write.
- #define DEBUG_PRINT_REGS */
- /*******************************************************************************
- Function name : vcmd_read_reg
- Description : Retrive the content of a hadware register
- Note: The status register will be read after every MB
- so it may be needed to buffer it's content if reading
- the HW register is slow.
- Return type : u32
- Argument : u32 offset
- *******************************************************************************/
- u32 vcmd_read_reg(const void *hwregs, u32 offset)
- {
- u32 val;
- val =(u32) ioread32((void*)hwregs + offset);
- PDEBUG("vcmd_read_reg 0x%02x --> %08x\n", offset, val);
- return val;
- }
- /*******************************************************************************
- Function name : vcmd_write_reg
- Description : Set the content of a hadware register
- Return type : void
- Argument : u32 offset
- Argument : u32 val
- *******************************************************************************/
- void vcmd_write_reg(const void *hwregs, u32 offset, u32 val)
- {
- iowrite32(val,(void*)hwregs + offset);
- PDEBUG("vcmd_write_reg 0x%02x with value %08x\n", offset, val);
- }
- /*------------------------------------------------------------------------------
- vcmd_write_register_value
- Write a value into a defined register field (write will happens actually).
- ------------------------------------------------------------------------------*/
- void vcmd_write_register_value(const void *hwregs,u32* reg_mirror,regVcmdName name, u32 value)
- {
- const regVcmdField_s *field;
- u32 regVal;
- field = &asicVcmdRegisterDesc[name];
- #ifdef DEBUG_PRINT_REGS
- PDEBUG("vcmd_write_register_value 0x%2x 0x%08x Value: %10d %s\n",
- field->base, field->mask, value, field->description);
- #endif
- /* Check that value fits in field */
- PDEBUG("field->name == name=%d\n",field->name == name);
- PDEBUG("((field->mask >> field->lsb) << field->lsb) == field->mask=%d\n",((field->mask >> field->lsb) << field->lsb) == field->mask);
- PDEBUG("(field->mask >> field->lsb) >= value=%d\n",(field->mask >> field->lsb) >= value);
- PDEBUG("field->base < ASIC_VCMD_SWREG_AMOUNT*4=%d\n",field->base < ASIC_VCMD_SWREG_AMOUNT*4);
- /* Clear previous value of field in register */
- regVal = reg_mirror[field->base/4] & ~(field->mask);
- /* Put new value of field in register */
- reg_mirror[field->base/4] = regVal | ((value << field->lsb) & field->mask);
- /* write it into HW registers */
- vcmd_write_reg(hwregs, field->base,reg_mirror[field->base/4]);
- }
- /*------------------------------------------------------------------------------
- vcmd_get_register_value
- Get an unsigned value from the ASIC registers
- ------------------------------------------------------------------------------*/
- u32 vcmd_get_register_value(const void *hwregs, u32* reg_mirror,regVcmdName name)
- {
- const regVcmdField_s *field;
- u32 value;
- field = &asicVcmdRegisterDesc[name];
- PDEBUG("field->base < ASIC_VCMD_SWREG_AMOUNT * 4=%d\n",field->base < ASIC_VCMD_SWREG_AMOUNT * 4);
- value = reg_mirror[field->base / 4] = vcmd_read_reg(hwregs, field->base);
- value = (value & field->mask) >> field->lsb;
- return value;
- }
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