diff options
Diffstat (limited to 'core/drivers/s5p6818_tieoff.c')
| -rw-r--r-- | core/drivers/s5p6818_tieoff.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/core/drivers/s5p6818_tieoff.c b/core/drivers/s5p6818_tieoff.c new file mode 100644 index 0000000..d415e3e --- /dev/null +++ b/core/drivers/s5p6818_tieoff.c @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2016 Nexell Co., Ltd. + * Author: Youngbok, Park <ybparkle@nexell.co.kr> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include <drivers/s5p6818_tieoff.h> +#include <io.h> + +#define NX_PIN_FN_SIZE 4 +#define TIEOFF_REG_NUM 33 + +struct nx_tieoff_registerset { + uint32_t tieoffreg[TIEOFF_REG_NUM]; +}; + +static struct nx_tieoff_registerset *nx_tieoff = (void *)0xC0011000; + + +void nx_tieoff_set(uint32_t tieoff_index, uint32_t tieoff_value) +{ + uint32_t regindex, mask; + uint32_t lsb, msb; + uint32_t regval; + + uint32_t position; + uint32_t bitwidth; + + position = tieoff_index & 0xffff; + bitwidth = (tieoff_index>>16) & 0xffff; + + regindex = position>>5; + + lsb = position & 0x1F; + msb = lsb+bitwidth; + + if (msb > 32) { + msb &= 0x1F; + mask = ~(0xffffffff<<lsb); + regval = read32((vaddr_t)&nx_tieoff->tieoffreg[regindex]) + & mask; + regval |= ((tieoff_value & ((1UL<<bitwidth)-1))<<lsb); + write32(regval, (vaddr_t)&nx_tieoff->tieoffreg[regindex]); + + mask = (0xffffffff<<msb); + regval = read32((vaddr_t)&nx_tieoff->tieoffreg[regindex+1]) + & mask; + regval |= ((tieoff_value & ((1UL<<bitwidth)-1))>>msb); + write32(regval, (vaddr_t)&nx_tieoff->tieoffreg[regindex+1]); + } else { + mask = (0xffffffff<<msb) | (~(0xffffffff<<lsb)); + regval = read32((vaddr_t)&nx_tieoff->tieoffreg[regindex]) + & mask; + regval |= ((tieoff_value & ((1UL<<bitwidth)-1))<<lsb); + write32(regval, (vaddr_t)&nx_tieoff->tieoffreg[regindex]); + } +} + +uint32_t nx_tieoff_get(uint32_t tieoff_index) +{ + uint32_t regindex, mask; + uint32_t lsb, msb; + uint32_t regval; + + uint32_t position; + uint32_t bitwidth; + + position = tieoff_index & 0xffff; + bitwidth = (tieoff_index>>16) & 0xffff; + + regindex = position/32; + lsb = position % 32; + msb = lsb+bitwidth; + + if (msb > 32) { + msb &= 0x1F; + mask = 0xffffffff<<lsb; + regval = read32((vaddr_t)&nx_tieoff->tieoffreg[regindex]) + & mask; + regval >>= lsb; + + mask = ~(0xffffffff<<msb); + regval |= ((read32((vaddr_t)&nx_tieoff->tieoffreg[regindex+1]) + & mask) + << (32-lsb)); + } else { + mask = ~(0xffffffff<<msb) & (0xffffffff<<lsb); + regval = read32((vaddr_t)&nx_tieoff->tieoffreg[regindex]) + & mask; + regval >>= lsb; + } + return regval; +} |