drivers/net/ethernet/altera/altera_utils.c

   1 /* Altera TSE SGDMA and MSGDMA Linux driver
   2  * Copyright (C) 2014 Altera Corporation. All rights reserved
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include "altera_tse.h"
  18 #include "altera_utils.h"
  19
  20 void tse_set_bit(void __iomem *ioaddr, size_t offs, u32 bit_mask)
  21 {
  22         u32 value = csrrd32(ioaddr, offs);
  23         value |= bit_mask;
  24         csrwr32(value, ioaddr, offs);
  25 }
  26
  27 void tse_clear_bit(void __iomem *ioaddr, size_t offs, u32 bit_mask)
  28 {
  29         u32 value = csrrd32(ioaddr, offs);
  30         value &= ~bit_mask;
  31         csrwr32(value, ioaddr, offs);
  32 }
  33
  34 int tse_bit_is_set(void __iomem *ioaddr, size_t offs, u32 bit_mask)
  35 {
  36         u32 value = csrrd32(ioaddr, offs);
  37         return (value & bit_mask) ? 1 : 0;
  38 }
  39
  40 int tse_bit_is_clear(void __iomem *ioaddr, size_t offs, u32 bit_mask)
  41 {
  42         u32 value = csrrd32(ioaddr, offs);
  43         return (value & bit_mask) ? 0 : 1;
  44 }