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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | /* * Serial Port stuff - taken from Linux * * (C) Copyright 2002 * MAZeT GmbH <www.mazet.de> * Stephan Linz <linz@mazet.de>, <linz@li-pro.net> * * (c) 2004 * IMMS gGmbH <www.imms.de> * Thomas Elste <info@elste.org> * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <common.h> #ifdef CONFIG_NETARM #include <asm/hardware.h> DECLARE_GLOBAL_DATA_PTR; #define PORTA (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_PORTA)) #if !defined(CONFIG_NETARM_NS7520) #define PORTB (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_PORTB)) #else #define PORTC (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_PORTC)) #endif /* wait until transmitter is ready for another character */ #define TXWAITRDY(registers) \ { \ ulong tmo = get_timer(0) + 1 * CFG_HZ; \ while (((registers)->status_a & NETARM_SER_STATA_TX_RDY) == 0 ) { \ if (get_timer(0) > tmo) \ break; \ } \ } #ifndef CONFIG_UART1_CONSOLE volatile netarm_serial_channel_t *serial_reg_ch1 = get_serial_channel(0); volatile netarm_serial_channel_t *serial_reg_ch2 = get_serial_channel(1); #else volatile netarm_serial_channel_t *serial_reg_ch1 = get_serial_channel(1); volatile netarm_serial_channel_t *serial_reg_ch2 = get_serial_channel(0); #endif extern void _netarm_led_FAIL1(void); /* * Setup both serial i/f with given baudrate */ void serial_setbrg (void) { /* set 0 ... make sure pins are configured for serial */ #if !defined(CONFIG_NETARM_NS7520) PORTA = PORTB = NETARM_GEN_PORT_MODE (0xef) | NETARM_GEN_PORT_DIR (0xe0); #else PORTA = NETARM_GEN_PORT_MODE (0xef) | NETARM_GEN_PORT_DIR (0xe0); PORTC = NETARM_GEN_PORT_CSF (0xef) | NETARM_GEN_PORT_MODE (0xef) | NETARM_GEN_PORT_DIR (0xe0); #endif /* first turn em off */ serial_reg_ch1->ctrl_a = serial_reg_ch2->ctrl_a = 0; /* clear match register, we don't need it */ serial_reg_ch1->rx_match = serial_reg_ch2->rx_match = 0; /* setup bit rate generator and rx buffer gap timer (1 byte only) */ if ((gd->baudrate >= MIN_BAUD_RATE) && (gd->baudrate <= MAX_BAUD_RATE)) { serial_reg_ch1->bitrate = serial_reg_ch2->bitrate = NETARM_SER_BR_X16 (gd->baudrate); serial_reg_ch1->rx_buf_timer = serial_reg_ch2->rx_buf_timer = 0; serial_reg_ch1->rx_char_timer = serial_reg_ch2->rx_char_timer = NETARM_SER_RXGAP (gd->baudrate); } else { hang (); } /* setup port mode */ serial_reg_ch1->ctrl_b = serial_reg_ch2->ctrl_b = ( NETARM_SER_CTLB_RCGT_EN | NETARM_SER_CTLB_UART_MODE); serial_reg_ch1->ctrl_a = serial_reg_ch2->ctrl_a = ( NETARM_SER_CTLA_ENABLE | NETARM_SER_CTLA_P_NONE | /* see errata */ NETARM_SER_CTLA_2STOP | NETARM_SER_CTLA_8BITS | NETARM_SER_CTLA_DTR_EN | NETARM_SER_CTLA_RTS_EN); } /* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. */ int serial_init (void) { serial_setbrg (); return 0; } /* * Output a single byte to the serial port. */ void serial_putc (const char c) { volatile unsigned char *fifo; /* If \n, also do \r */ if (c == '\n') serial_putc ('\r'); fifo = (volatile unsigned char *) &(serial_reg_ch1->fifo); TXWAITRDY (serial_reg_ch1); *fifo = c; } /* * Test of a single byte from the serial port. Returns 1 on success, 0 * otherwise. */ int serial_tstc(void) { return serial_reg_ch1->status_a & NETARM_SER_STATA_RX_RDY; } /* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. */ int serial_getc (void) { unsigned int ch_uint; volatile unsigned int *fifo; volatile unsigned char *fifo_char = NULL; int buf_count = 0; while (!(serial_reg_ch1->status_a & NETARM_SER_STATA_RX_RDY)) /* NOP */ ; fifo = (volatile unsigned int *) &(serial_reg_ch1->fifo); fifo_char = (unsigned char *) &ch_uint; ch_uint = *fifo; buf_count = NETARM_SER_STATA_RXFDB (serial_reg_ch1->status_a); switch (buf_count) { case NETARM_SER_STATA_RXFDB_4BYTES: buf_count = 4; break; case NETARM_SER_STATA_RXFDB_3BYTES: buf_count = 3; break; case NETARM_SER_STATA_RXFDB_2BYTES: buf_count = 2; break; case NETARM_SER_STATA_RXFDB_1BYTES: buf_count = 1; break; default: /* panic, be never here */ break; } serial_reg_ch1->status_a |= NETARM_SER_STATA_RX_CLOSED; return ch_uint & 0xff; } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } } #endif /* CONFIG_NETARM */ |