[a91dc98b] | 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/arm-pl011.h> |
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| 16 | #include <bsp/arm-pl011-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 pl011 *pl011_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 pl011 *) ct->ulCtrlPort1; |
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| 26 | } |
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| 27 | |
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| 28 | static void pl011_initialize(int minor) |
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| 29 | { |
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| 30 | volatile pl011 *regs = pl011_get_regs(minor); |
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| 31 | |
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| 32 | regs->uartlcr_h = PL011_UARTLCR_H_WLEN(PL011_UARTLCR_H_WLEN_8); |
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| 33 | regs->uartcr = PL011_UARTCR_RXE |
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| 34 | | PL011_UARTCR_TXE |
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| 35 | | PL011_UARTCR_UARTEN; |
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| 36 | } |
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| 37 | |
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| 38 | static int pl011_first_open(int major, int minor, void *arg) |
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| 39 | { |
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| 40 | rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg; |
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| 41 | struct rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1; |
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| 42 | console_data *cd = &Console_Port_Data[minor]; |
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| 43 | const console_tbl *ct = Console_Port_Tbl[minor]; |
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| 44 | |
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| 45 | cd->termios_data = tty; |
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| 46 | rtems_termios_set_initial_baud(tty, (rtems_termios_baud_t) ct->pDeviceParams); |
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| 47 | |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |
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| 51 | static int pl011_last_close(int major, int minor, void *arg) |
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| 52 | { |
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| 53 | return 0; |
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| 54 | } |
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| 55 | |
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| 56 | static int pl011_read_polled(int minor) |
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| 57 | { |
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| 58 | volatile pl011 *regs = pl011_get_regs(minor); |
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| 59 | |
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| 60 | if ((regs->uartfr & PL011_UARTFR_RXFE) != 0) { |
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| 61 | return -1; |
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| 62 | } else { |
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| 63 | return PL011_UARTDR_DATA(regs->uartdr); |
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| 64 | } |
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| 65 | } |
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| 66 | |
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| 67 | static void pl011_write_polled(int minor, char c) |
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| 68 | { |
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| 69 | volatile pl011 *regs = pl011_get_regs(minor); |
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| 70 | |
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| 71 | while ((regs->uartfr & PL011_UARTFR_TXFF) != 0) { |
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| 72 | /* Wait */ |
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| 73 | } |
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| 74 | |
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| 75 | regs->uartdr = PL011_UARTDR_DATA(c); |
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| 76 | } |
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| 77 | |
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| 78 | static ssize_t pl011_write_support_polled( |
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| 79 | int minor, |
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| 80 | const char *s, |
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| 81 | size_t n |
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| 82 | ) |
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| 83 | { |
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| 84 | ssize_t i = 0; |
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| 85 | |
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| 86 | for (i = 0; i < n; ++i) { |
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| 87 | pl011_write_polled(minor, s[i]); |
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| 88 | } |
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| 89 | |
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| 90 | return n; |
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| 91 | } |
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| 92 | |
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| 93 | static int pl011_set_attribues(int minor, const struct termios *term) |
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| 94 | { |
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| 95 | return -1; |
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| 96 | } |
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| 97 | |
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| 98 | const console_fns arm_pl011_fns = { |
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| 99 | .deviceProbe = libchip_serial_default_probe, |
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| 100 | .deviceFirstOpen = pl011_first_open, |
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| 101 | .deviceLastClose = pl011_last_close, |
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| 102 | .deviceRead = pl011_read_polled, |
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| 103 | .deviceWrite = pl011_write_support_polled, |
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| 104 | .deviceInitialize = pl011_initialize, |
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| 105 | .deviceWritePolled = pl011_write_polled, |
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| 106 | .deviceSetAttributes = pl011_set_attribues, |
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| 107 | .deviceOutputUsesInterrupts = false |
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| 108 | }; |
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