2 * SBE 2T3E3 synchronous serial card driver for Linux
4 * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License
8 * as published by the Free Software Foundation.
10 * This code is based on a driver written by SBE Inc.
16 void exar7300_init(struct channel *sc)
18 exar7300_write(sc, SBE_2T3E3_LIU_REG_REG1, 0);
20 /* enable line decodeer and encoder */
21 exar7300_write(sc, SBE_2T3E3_LIU_REG_REG2, 0);
22 exar7300_write(sc, SBE_2T3E3_LIU_REG_REG3, 0);
23 exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4,
24 SBE_2T3E3_LIU_VAL_T3_MODE_SELECT |
25 SBE_2T3E3_LIU_VAL_LOOPBACK_OFF);
28 void exar7300_set_loopback(struct channel *sc, u32 mode)
33 case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF:
34 case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE:
35 case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG:
36 case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL:
42 val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4);
43 val &= ~(SBE_2T3E3_LIU_VAL_LOCAL_LOOPBACK | SBE_2T3E3_LIU_VAL_REMOTE_LOOPBACK);
45 exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val);
48 /* TODO - is it necessary? idea from 2T3E3_HW_Test_code */
50 case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF:
52 case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE:
53 exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
55 case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG:
56 exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF);
58 case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL:
59 exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
65 void exar7300_set_frame_type(struct channel *sc, u32 type)
70 case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
71 case SBE_2T3E3_FRAME_TYPE_T3_M13:
72 case SBE_2T3E3_FRAME_TYPE_E3_G751:
73 case SBE_2T3E3_FRAME_TYPE_E3_G832:
79 val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4);
80 val &= ~(SBE_2T3E3_LIU_VAL_T3_MODE_SELECT |
81 SBE_2T3E3_LIU_VAL_E3_MODE_SELECT);
84 case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
85 case SBE_2T3E3_FRAME_TYPE_T3_M13:
86 val |= SBE_2T3E3_LIU_VAL_T3_MODE_SELECT;
88 case SBE_2T3E3_FRAME_TYPE_E3_G751:
89 case SBE_2T3E3_FRAME_TYPE_E3_G832:
90 val |= SBE_2T3E3_LIU_VAL_E3_MODE_SELECT;
96 exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val);
100 void exar7300_transmit_all_ones_onoff(struct channel *sc, u32 mode)
102 if (sc->p.transmit_all_ones == mode)
107 exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
108 SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES);
111 exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
112 SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES);
118 sc->p.transmit_all_ones = mode;
121 void exar7300_receive_equalization_onoff(struct channel *sc, u32 mode)
123 if (sc->p.receive_equalization == mode)
128 exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG2,
129 SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE);
132 exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG2,
133 SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE);
139 sc->p.receive_equalization = mode;
142 void exar7300_line_build_out_onoff(struct channel *sc, u32 mode)
144 if (sc->p.line_build_out == mode)
149 exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
150 SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT);
151 exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF);
154 exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
155 SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT);
156 exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
162 sc->p.line_build_out = mode;
165 /* TODO - what about encoder in raw mode??? disable it too? */
166 void exar7300_unipolar_onoff(struct channel *sc, u32 mode)
170 exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG3,
171 SBE_2T3E3_LIU_VAL_DECODER_DISABLE);
172 exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
173 SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA);
176 exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG3,
177 SBE_2T3E3_LIU_VAL_DECODER_DISABLE);
178 exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
179 SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA);