FreeCalypso > hg > freecalypso-sw
annotate target-utils/libcommon/abbdrv.c @ 501:da8248e23aca
osx.c: int_osx_free_mem() done
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Tue, 01 Jul 2014 18:32:41 +0000 |
parents | 6661e5bc0712 |
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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 } |