FreeCalypso > hg > freecalypso-tools
annotate target-utils/libbase/abbdrv.c @ 416:30f6d1c32c6f
doc/Flash-boot-defect article removed (no longer relevant)
This article is no longer relevant because the issue in question
only affected one (1) defective FCDEV3B board which was not
and never will be sold.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 26 Oct 2018 07:11:08 +0000 |
parents | e7502631a0f9 |
children | 3d73d4d3527f |
rev | line source |
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1 /* Driver for Analog Baseband Circuit (TWL3025) */ |
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2 /* lifted from OsmocomBB and ported to FreeCalypso target-utils environment */ |
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3 |
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4 /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
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5 * |
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6 * All Rights Reserved |
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7 * |
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8 * This program is free software; you can redistribute it and/or modify |
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9 * it under the terms of the GNU General Public License as published by |
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10 * the Free Software Foundation; either version 2 of the License, or |
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11 * (at your option) any later version. |
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12 * |
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13 * This program is distributed in the hope that it will be useful, |
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 * GNU General Public License for more details. |
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17 * |
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18 * You should have received a copy of the GNU General Public License along |
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19 * with this program; if not, write to the Free Software Foundation, Inc., |
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20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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21 * |
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22 */ |
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23 |
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24 #include "types.h" |
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25 #include "abbdefs.h" |
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26 |
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27 /* TWL3025 */ |
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28 #define REG_PAGE(n) ((n) >> 7) |
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29 #define REG_ADDR(n) ((n) & 0x1f) |
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30 |
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31 #define TWL3025_DEV_IDX 0 /* On the SPI bus */ |
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32 #define TWL3025_TSP_DEV_IDX 0 /* On the TSP bus */ |
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33 |
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34 int abb_state_initdone, abb_state_page; |
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35 |
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36 void |
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37 abb_reg_write(reg, data) |
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38 { |
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39 u16 tx; |
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40 |
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41 if (reg != PAGEREG && REG_PAGE(reg) != abb_state_page) |
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42 abb_select_page(REG_PAGE(reg)); |
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43 |
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44 tx = ((data & 0x3ff) << 6) | (REG_ADDR(reg) << 1); |
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45 |
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46 spi_xfer(TWL3025_DEV_IDX, 16, &tx, 0); |
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47 } |
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48 |
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49 u16 |
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50 abb_reg_read(reg) |
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51 { |
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52 u16 tx, rx; |
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53 |
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54 if (REG_PAGE(reg) != abb_state_page) |
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55 abb_select_page(REG_PAGE(reg)); |
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56 |
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57 tx = (REG_ADDR(reg) << 1) | 1; |
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58 |
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59 /* A read cycle contains two SPI transfers */ |
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60 spi_xfer(TWL3025_DEV_IDX, 16, &tx, &rx); |
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61 osmo_delay_ms(1); |
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62 spi_xfer(TWL3025_DEV_IDX, 16, &tx, &rx); |
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63 |
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64 rx >>= 6; |
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65 |
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66 return rx; |
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67 } |
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68 |
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69 /* Switch the register page of the TWL3025 */ |
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70 abb_select_page(page) |
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71 { |
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72 if (page == 0) |
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73 abb_reg_write(PAGEREG, 1 << 0); |
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74 else |
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75 abb_reg_write(PAGEREG, 1 << 1); |
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76 abb_state_page = page; |
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77 return(0); |
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78 } |
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79 |
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80 abb_init() |
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81 { |
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82 if (abb_state_initdone) |
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83 return(0); |
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84 spi_init(); |
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85 abb_select_page(0); |
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86 /* CLK13M enable */ |
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87 abb_reg_write(TOGBR2, TOGBR2_ACTS); |
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88 osmo_delay_ms(1); |
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89 /* for whatever reason we need to do this twice */ |
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90 abb_reg_write(TOGBR2, TOGBR2_ACTS); |
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91 osmo_delay_ms(1); |
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92 abb_state_initdone = 1; |
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93 return(1); |
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94 } |
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95 |
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96 void |
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97 abb_power_off() |
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98 { |
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99 abb_init(); |
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100 serial_flush(); |
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101 abb_reg_write(VRPCDEV, 0x01); |
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102 } |