1 | /* placeholder (just a shell) */ |
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2 | |
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3 | /* SPI driver for Blackfin |
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4 | * |
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5 | * Copyright (c) 2008 Kallisti Labs, Los Gatos, CA, USA |
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6 | * written by Allan Hessenflow <allanh@kallisti.com> |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | |
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16 | #include <stdlib.h> |
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17 | #include <rtems.h> |
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18 | #include <rtems/libi2c.h> |
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19 | |
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20 | #include <libcpu/spiRegs.h> |
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21 | #include "spi.h" |
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22 | |
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23 | |
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24 | static rtems_status_code spiInit(rtems_libi2c_bus_t *bus) { |
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25 | bfin_spi_softc_t *softc; |
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26 | rtems_status_code status; |
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27 | |
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28 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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29 | |
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30 | status = rtems_semaphore_create(rtems_build_name('s','p','i','s'), |
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31 | 0, |
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32 | RTEMS_FIFO | RTEMS_SIMPLE_BINARY_SEMAPHORE, |
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33 | 0, |
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34 | &softc->irq_sema_id); |
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35 | |
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36 | return status; |
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37 | } |
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38 | |
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39 | static rtems_status_code spiSendStart(rtems_libi2c_bus_t *bus) { |
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40 | bfin_spi_softc_t *softc; |
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41 | rtems_status_code status; |
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42 | |
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43 | status = RTEMS_SUCCESSFUL; |
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44 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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45 | |
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46 | return status; |
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47 | } |
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48 | |
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49 | static rtems_status_code spiSendStop(rtems_libi2c_bus_t *bus) { |
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50 | bfin_spi_softc_t *softc; |
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51 | rtems_status_code status; |
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52 | |
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53 | status = RTEMS_SUCCESSFUL; |
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54 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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55 | |
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56 | return status; |
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57 | } |
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58 | |
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59 | static rtems_status_code spiSendAddr(rtems_libi2c_bus_t *bus, |
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60 | uint32_t addr, int rw) { |
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61 | bfin_spi_softc_t *softc; |
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62 | rtems_status_code status; |
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63 | |
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64 | status = RTEMS_SUCCESSFUL; |
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65 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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66 | |
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67 | return status; |
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68 | } |
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69 | |
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70 | static int spiReadBytes(rtems_libi2c_bus_t *bus, |
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71 | unsigned char *buf, int len) { |
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72 | bfin_spi_softc_t *softc; |
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73 | |
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74 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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75 | |
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76 | return 0; |
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77 | } |
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78 | |
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79 | static int spiWriteBytes(rtems_libi2c_bus_t *bus, |
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80 | unsigned char *buf, int len) { |
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81 | bfin_spi_softc_t *softc; |
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82 | |
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83 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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84 | |
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85 | return 0; |
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86 | } |
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87 | |
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88 | static int spiIoctl(rtems_libi2c_bus_t *bus, int cmd, void *arg) { |
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89 | bfin_spi_softc_t *softc; |
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90 | |
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91 | softc = &(((bfin_spi_desc_t *)(bus))->softc); |
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92 | |
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93 | |
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94 | return 0; |
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95 | } |
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96 | |
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97 | void bfin_spi_isr(int source) { |
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98 | } |
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99 | |
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100 | rtems_libi2c_bus_ops_t bfin_spi_libi2c_bus_ops = { |
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101 | init: spiInit, |
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102 | send_start: spiSendStart, |
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103 | send_stop: spiSendStop, |
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104 | send_addr: spiSendAddr, |
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105 | read_bytes: spiReadBytes, |
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106 | write_bytes: spiWriteBytes, |
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107 | ioctl: spiIoctl |
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108 | }; |
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109 | |
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