124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/*-
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* Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_uart.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/cons.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <dev/bhnd/cores/chipc/chipcreg.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_bus.h>
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#include <dev/uart/uart_cpu.h>
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#include "bcm_socinfo.h"
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bus_space_tag_t uart_bus_space_io;
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bus_space_tag_t uart_bus_space_mem;
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static struct uart_class *chipc_uart_class = &uart_ns8250_class;
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#define CHIPC_UART_BAUDRATE 115200
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int
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uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
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{
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return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
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}
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static int
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uart_cpu_init(struct uart_devinfo *di, int uart, int baudrate)
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{
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struct bcm_socinfo *socinfo;
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if (uart >= CHIPC_UART_MAX)
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return (EINVAL);
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socinfo = bcm_get_socinfo();
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di->ops = uart_getops(chipc_uart_class);
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di->bas.chan = 0;
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di->bas.bst = uart_bus_space_mem;
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di->bas.bsh = (bus_space_handle_t) BCM_SOCREG(CHIPC_UART(uart));
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di->bas.regshft = 0;
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di->bas.rclk = socinfo->uartrate; /* in Hz */
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di->baudrate = baudrate;
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di->databits = 8;
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di->stopbits = 1;
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di->parity = UART_PARITY_NONE;
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return (0);
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}
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int
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uart_cpu_getdev(int devtype, struct uart_devinfo *di)
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{
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int ivar;
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uart_bus_space_io = NULL;
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uart_bus_space_mem = mips_bus_space_generic;
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/* Check the environment. */
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if (uart_getenv(devtype, di, chipc_uart_class) == 0)
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return (0);
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/* Scan the device hints for the first matching device */
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for (int i = 0; i < CHIPC_UART_MAX; i++) {
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if (resource_int_value("uart", i, "flags", &ivar))
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continue;
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/* Check usability */
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if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
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continue;
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if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
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continue;
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if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
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ivar == 0)
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continue;
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/* Found */
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if (resource_int_value("uart", i, "baud", &ivar) != 0)
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ivar = CHIPC_UART_BAUDRATE;
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return (uart_cpu_init(di, i, ivar));
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}
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/* Default to uart0/115200 */
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return (uart_cpu_init(di, 0, CHIPC_UART_BAUDRATE));
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}
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