1 | /* |
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2 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <info@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #include <bsp/zynq-uart.h> |
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16 | #include <bsp/zynq-uart-regs.h> |
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17 | |
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18 | #include <libchip/sersupp.h> |
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19 | |
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20 | static volatile zynq_uart *zynq_uart_get_regs(int minor) |
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21 | { |
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22 | const console_tbl *ct = Console_Port_Tbl != NULL ? |
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23 | Console_Port_Tbl[minor] : &Console_Configuration_Ports[minor]; |
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24 | |
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25 | return (volatile zynq_uart *) ct->ulCtrlPort1; |
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26 | } |
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27 | |
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28 | static void zynq_uart_initialize(int minor) |
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29 | { |
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30 | volatile zynq_uart *regs = zynq_uart_get_regs(minor); |
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31 | |
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32 | regs->control = ZYNQ_UART_CONTROL_RXDIS |
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33 | | ZYNQ_UART_CONTROL_TXDIS |
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34 | | ZYNQ_UART_CONTROL_RXRES |
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35 | | ZYNQ_UART_CONTROL_TXRES; |
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36 | regs->mode = ZYNQ_UART_MODE_CHMODE(ZYNQ_UART_MODE_CHMODE_NORMAL) |
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37 | | ZYNQ_UART_MODE_PAR(ZYNQ_UART_MODE_PAR_NONE) |
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38 | | ZYNQ_UART_MODE_CHRL(ZYNQ_UART_MODE_CHRL_8); |
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39 | regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(1); |
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40 | regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(0xff); |
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41 | regs->rx_fifo_trg_lvl = ZYNQ_UART_RX_FIFO_TRG_LVL_RTRIG(0); |
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42 | regs->rx_timeout = ZYNQ_UART_RX_TIMEOUT_RTO(0); |
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43 | regs->control = ZYNQ_UART_CONTROL_RXEN |
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44 | | ZYNQ_UART_CONTROL_TXEN |
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45 | | ZYNQ_UART_CONTROL_RSTTO; |
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46 | } |
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47 | |
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48 | static int zynq_uart_first_open(int major, int minor, void *arg) |
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49 | { |
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50 | rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg; |
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51 | struct rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1; |
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52 | console_data *cd = &Console_Port_Data[minor]; |
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53 | const console_tbl *ct = Console_Port_Tbl[minor]; |
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54 | |
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55 | cd->termios_data = tty; |
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56 | rtems_termios_set_initial_baud(tty, (rtems_termios_baud_t) ct->pDeviceParams); |
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57 | |
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58 | return 0; |
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59 | } |
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60 | |
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61 | static int zynq_uart_last_close(int major, int minor, void *arg) |
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62 | { |
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63 | return 0; |
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64 | } |
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65 | |
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66 | static int zynq_uart_read_polled(int minor) |
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67 | { |
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68 | volatile zynq_uart *regs = zynq_uart_get_regs(minor); |
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69 | |
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70 | if ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_REMPTY) != 0) { |
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71 | return -1; |
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72 | } else { |
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73 | return ZYNQ_UART_TX_RX_FIFO_FIFO_GET(regs->tx_rx_fifo); |
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74 | } |
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75 | } |
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76 | |
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77 | static void zynq_uart_write_polled(int minor, char c) |
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78 | { |
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79 | volatile zynq_uart *regs = zynq_uart_get_regs(minor); |
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80 | |
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81 | while ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TFUL) != 0) { |
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82 | /* Wait */ |
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83 | } |
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84 | |
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85 | regs->tx_rx_fifo = ZYNQ_UART_TX_RX_FIFO_FIFO(c); |
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86 | } |
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87 | |
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88 | static ssize_t zynq_uart_write_support_polled( |
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89 | int minor, |
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90 | const char *s, |
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91 | size_t n |
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92 | ) |
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93 | { |
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94 | ssize_t i = 0; |
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95 | |
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96 | for (i = 0; i < n; ++i) { |
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97 | zynq_uart_write_polled(minor, s[i]); |
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98 | } |
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99 | |
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100 | return n; |
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101 | } |
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102 | |
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103 | static int zynq_uart_set_attribues(int minor, const struct termios *term) |
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104 | { |
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105 | return -1; |
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106 | } |
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107 | |
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108 | const console_fns zynq_uart_fns = { |
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109 | .deviceProbe = libchip_serial_default_probe, |
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110 | .deviceFirstOpen = zynq_uart_first_open, |
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111 | .deviceLastClose = zynq_uart_last_close, |
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112 | .deviceRead = zynq_uart_read_polled, |
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113 | .deviceWrite = zynq_uart_write_support_polled, |
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114 | .deviceInitialize = zynq_uart_initialize, |
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115 | .deviceWritePolled = zynq_uart_write_polled, |
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116 | .deviceSetAttributes = zynq_uart_set_attribues, |
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117 | .deviceOutputUsesInterrupts = false |
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118 | }; |
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