| 1 | /*
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| 2 | * Copyright (c) 2010 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup uspace_srv_s3c24xx_uart
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * @brief Samsung S3C24xx on-chip UART driver.
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| 35 | */
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| 36 |
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| 37 | #ifndef S3C24XX_UART_H_
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| 38 | #define S3C24XX_UART_H_
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| 39 |
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| 40 | #include <adt/circ_buf.h>
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| 41 | #include <async.h>
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| 42 | #include <fibril_synch.h>
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| 43 | #include <io/chardev_srv.h>
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| 44 | #include <stdint.h>
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| 45 |
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| 46 | /** S3C24xx UART I/O */
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| 47 | typedef struct {
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| 48 | uint32_t ulcon;
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| 49 | uint32_t ucon;
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| 50 | uint32_t ufcon;
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| 51 | uint32_t umcon;
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| 52 |
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| 53 | uint32_t utrstat;
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| 54 | uint32_t uerstat;
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| 55 | uint32_t ufstat;
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| 56 | uint32_t umstat;
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| 57 |
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| 58 | uint32_t utxh;
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| 59 | uint32_t urxh;
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| 60 |
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| 61 | uint32_t ubrdiv;
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| 62 | } s3c24xx_uart_io_t;
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| 63 |
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| 64 | /* Bits in UTRSTAT register */
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| 65 | #define S3C24XX_UTRSTAT_TX_EMPTY 0x4
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| 66 | #define S3C24XX_UTRSTAT_RDATA 0x1
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| 67 |
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| 68 | /* Bits in UFSTAT register */
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| 69 | #define S3C24XX_UFSTAT_TX_FULL 0x4000
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| 70 | #define S3C24XX_UFSTAT_RX_FULL 0x0040
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| 71 | #define S3C24XX_UFSTAT_RX_COUNT 0x002f
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| 72 |
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| 73 | /* Bits in UCON register */
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| 74 | #define UCON_RX_INT_LEVEL 0x100
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| 75 |
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| 76 | /* Bits in UFCON register */
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| 77 | #define UFCON_TX_FIFO_TLEVEL_EMPTY 0x00
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| 78 | #define UFCON_RX_FIFO_TLEVEL_1B 0x00
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| 79 | #define UFCON_FIFO_ENABLE 0x01
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| 80 |
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| 81 | enum {
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| 82 | s3c24xx_uart_buf_size = 64
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| 83 | };
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| 84 |
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| 85 | /** S3C24xx UART instance */
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| 86 | typedef struct {
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| 87 | /** Physical device address */
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| 88 | uintptr_t paddr;
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| 89 |
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| 90 | /** Device I/O structure */
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| 91 | s3c24xx_uart_io_t *io;
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| 92 |
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| 93 | /** Character device service */
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| 94 | chardev_srvs_t cds;
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| 95 |
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| 96 | /** Service ID */
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| 97 | service_id_t service_id;
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| 98 |
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| 99 | /** Circular buffer */
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| 100 | circ_buf_t cbuf;
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| 101 | /** Buffer */
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| 102 | uint8_t buf[s3c24xx_uart_buf_size];
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| 103 | /** Buffer lock */
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| 104 | fibril_mutex_t buf_lock;
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| 105 | /** Signal newly added data in buffer */
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| 106 | fibril_condvar_t buf_cv;
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| 107 | } s3c24xx_uart_t;
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| 108 |
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| 109 | #endif
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| 110 |
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| 111 | /** @}
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| 112 | */
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