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author | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
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committer | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
commit | 92988a21ad4c4c9504295ccb580c9f806134471b (patch) | |
tree | 5effc9f14170112450de05c67dafbe8d5034d595 /drivers/twserial/soft_tws.c | |
parent | ca2b506783b676c95762c54ea24dcfdaae1947c9 (diff) | |
download | bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.zip bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.gz bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.bz2 |
added boot script files to repository
Diffstat (limited to 'drivers/twserial/soft_tws.c')
-rw-r--r-- | drivers/twserial/soft_tws.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/drivers/twserial/soft_tws.c b/drivers/twserial/soft_tws.c deleted file mode 100644 index 0b50e1d..0000000 --- a/drivers/twserial/soft_tws.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * (C) Copyright 2009 - * Detlev Zundel, DENX Software Engineering, dzu@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - * - */ - -#define TWS_IMPLEMENTATION -#include <common.h> - -/*=====================================================================*/ -/* Public Functions */ -/*=====================================================================*/ - -/*----------------------------------------------------------------------- - * Read bits - */ -int tws_read(uchar *buffer, int len) -{ - int rem = len; - uchar accu, shift; - - debug("tws_read: buffer %p len %d\n", buffer, len); - - /* Configure the data pin for input */ - tws_data_config_output(0); - - /* Disable WR, i.e. setup a read */ - tws_wr(0); - udelay(1); - - /* Rise CE */ - tws_ce(1); - udelay(1); - - for (; rem > 0; ) { - for (shift = 0, accu = 0; - (rem > 0) && (shift < 8); - rem--, shift++) { - tws_clk(1); - udelay(10); - accu |= (tws_data_read() << shift); /* LSB first */ - tws_clk(0); - udelay(10); - } - *buffer++ = accu; - } - - /* Lower CE */ - tws_ce(0); - - return len - rem; -} - - -/*----------------------------------------------------------------------- - * Write bits - */ -int tws_write(uchar *buffer, int len) -{ - int rem = len; - uchar accu, shift; - - debug("tws_write: buffer %p len %d\n", buffer, len); - - /* Configure the data pin for output */ - tws_data_config_output(1); - - /* Enable WR, i.e. setup a write */ - tws_wr(1); - udelay(1); - - /* Rise CE */ - tws_ce(1); - udelay(1); - - for (; rem > 0; ) { - for (shift = 0, accu = *buffer++; - (rem > 0) && (shift < 8); - rem--, shift++) { - tws_data(accu & 0x01); /* LSB first */ - tws_clk(1); - udelay(10); - tws_clk(0); - udelay(10); - accu >>= 1; - } - } - - /* Lower CE */ - tws_ce(0); - - return len - rem; -} |