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