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authorKrzysztof Halasa <khc@pm.waw.pl>2010-08-12 21:14:07 (GMT)
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-31 00:36:50 (GMT)
commit921a86e0e306e42452e16894f2cc792659ede16b (patch)
tree3c3709b0ad5c9a324db7a56530675b9d9f2198c1 /drivers/staging/sbe-2t3e3/exar7300.c
parentb0b57633089ee4726aefe20760132c41bbd83fff (diff)
downloadlinux-fsl-qoriq-921a86e0e306e42452e16894f2cc792659ede16b.tar.xz
Staging: Add SBE 2T3E3 WAN driver
This is a driver for SBE Inc.'s dual port T3/E3 WAN cards. Based on their original GPLed driver. The original driver tarball is now accessible at http://userweb.kernel.org/~chris/SBE_2T3_Linux_2.0c.tgz It needs at least a new generic HDLC setup code (not yet written) before moving to drivers/net/wan. Signed-off-by: Krzysztof HaƂasa <khc@pm.waw.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/sbe-2t3e3/exar7300.c')
-rw-r--r--drivers/staging/sbe-2t3e3/exar7300.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/drivers/staging/sbe-2t3e3/exar7300.c b/drivers/staging/sbe-2t3e3/exar7300.c
new file mode 100644
index 0000000..d10d696
--- /dev/null
+++ b/drivers/staging/sbe-2t3e3/exar7300.c
@@ -0,0 +1,182 @@
+/*
+ * SBE 2T3E3 synchronous serial card driver for Linux
+ *
+ * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This code is based on a driver written by SBE Inc.
+ */
+
+#include "2t3e3.h"
+#include "ctrl.h"
+
+void exar7300_init(struct channel *sc)
+{
+ exar7300_write(sc, SBE_2T3E3_LIU_REG_REG1, 0);
+
+ /* enable line decodeer and encoder */
+ exar7300_write(sc, SBE_2T3E3_LIU_REG_REG2, 0);
+ exar7300_write(sc, SBE_2T3E3_LIU_REG_REG3, 0);
+ exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4,
+ SBE_2T3E3_LIU_VAL_T3_MODE_SELECT |
+ SBE_2T3E3_LIU_VAL_LOOPBACK_OFF);
+}
+
+void exar7300_set_loopback(struct channel *sc, u32 mode)
+{
+ u32 val;
+
+ switch (mode) {
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF:
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE:
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG:
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL:
+ break;
+ default:
+ return;
+ }
+
+ val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4);
+ val &= ~(SBE_2T3E3_LIU_VAL_LOCAL_LOOPBACK | SBE_2T3E3_LIU_VAL_REMOTE_LOOPBACK);
+ val |= mode;
+ exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val);
+
+#if 0
+ /* TODO - is it necessary? idea from 2T3E3_HW_Test_code */
+ switch (mode) {
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF:
+ break;
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE:
+ exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
+ break;
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG:
+ exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF);
+ break;
+ case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL:
+ exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
+ break;
+ }
+#endif
+}
+
+void exar7300_set_frame_type(struct channel *sc, u32 type)
+{
+ u32 val;
+
+ switch (type) {
+ case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
+ case SBE_2T3E3_FRAME_TYPE_T3_M13:
+ case SBE_2T3E3_FRAME_TYPE_E3_G751:
+ case SBE_2T3E3_FRAME_TYPE_E3_G832:
+ break;
+ default:
+ return;
+ }
+
+ val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4);
+ val &= ~(SBE_2T3E3_LIU_VAL_T3_MODE_SELECT |
+ SBE_2T3E3_LIU_VAL_E3_MODE_SELECT);
+
+ switch (type) {
+ case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
+ case SBE_2T3E3_FRAME_TYPE_T3_M13:
+ val |= SBE_2T3E3_LIU_VAL_T3_MODE_SELECT;
+ break;
+ case SBE_2T3E3_FRAME_TYPE_E3_G751:
+ case SBE_2T3E3_FRAME_TYPE_E3_G832:
+ val |= SBE_2T3E3_LIU_VAL_E3_MODE_SELECT;
+ break;
+ default:
+ return;
+ }
+
+ exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val);
+}
+
+
+void exar7300_transmit_all_ones_onoff(struct channel *sc, u32 mode)
+{
+ if (sc->p.transmit_all_ones == mode)
+ return;
+
+ switch (mode) {
+ case SBE_2T3E3_ON:
+ exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
+ SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES);
+ break;
+ case SBE_2T3E3_OFF:
+ exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
+ SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES);
+ break;
+ default:
+ return;
+ }
+
+ sc->p.transmit_all_ones = mode;
+}
+
+void exar7300_receive_equalization_onoff(struct channel *sc, u32 mode)
+{
+ if (sc->p.receive_equalization == mode)
+ return;
+
+ switch (mode) {
+ case SBE_2T3E3_OFF:
+ exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG2,
+ SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE);
+ break;
+ case SBE_2T3E3_ON:
+ exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG2,
+ SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE);
+ break;
+ default:
+ return;
+ }
+
+ sc->p.receive_equalization = mode;
+}
+
+void exar7300_line_build_out_onoff(struct channel *sc, u32 mode)
+{
+ if (sc->p.line_build_out == mode)
+ return;
+
+ switch (mode) {
+ case SBE_2T3E3_OFF:
+ exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
+ SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT);
+ exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF);
+ break;
+ case SBE_2T3E3_ON:
+ exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
+ SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT);
+ exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
+ break;
+ default:
+ return;
+ }
+
+ sc->p.line_build_out = mode;
+}
+
+/* TODO - what about encoder in raw mode??? disable it too? */
+void exar7300_unipolar_onoff(struct channel *sc, u32 mode)
+{
+ switch (mode) {
+ case SBE_2T3E3_OFF:
+ exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG3,
+ SBE_2T3E3_LIU_VAL_DECODER_DISABLE);
+ exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
+ SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA);
+ break;
+ case SBE_2T3E3_ON:
+ exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG3,
+ SBE_2T3E3_LIU_VAL_DECODER_DISABLE);
+ exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
+ SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA);
+ break;
+ }
+}