1299994Sadrian/*- 2299994Sadrian * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com> 3299994Sadrian * 4299994Sadrian * All rights reserved. 5299994Sadrian * 6299994Sadrian * Redistribution and use in source and binary forms, with or without 7299994Sadrian * modification, are permitted provided that the following conditions 8299994Sadrian * are met: 9299994Sadrian * 1. Redistributions of source code must retain the above copyright 10299994Sadrian * notice, this list of conditions and the following disclaimer. 11299994Sadrian * 2. Redistributions in binary form must reproduce the above copyright 12299994Sadrian * notice, this list of conditions and the following disclaimer in the 13299994Sadrian * documentation and/or other materials provided with the distribution. 14299994Sadrian * 15299994Sadrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16299994Sadrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17299994Sadrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18299994Sadrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19299994Sadrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20299994Sadrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21299994Sadrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22299994Sadrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23299994Sadrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24299994Sadrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25299994Sadrian * SUCH DAMAGE. 26299994Sadrian */ 27299994Sadrian 28299994Sadrian#include <sys/cdefs.h> 29299994Sadrian__FBSDID("$FreeBSD: releng/11.0/sys/mips/broadcom/uart_cpu_chipc.c 302190 2016-06-25 04:34:54Z landonf $"); 30299994Sadrian 31299994Sadrian#include "opt_uart.h" 32299994Sadrian 33299994Sadrian#include <sys/param.h> 34299994Sadrian#include <sys/systm.h> 35299994Sadrian#include <sys/bus.h> 36299994Sadrian#include <sys/cons.h> 37299994Sadrian#include <sys/lock.h> 38299994Sadrian#include <sys/mutex.h> 39299994Sadrian 40299994Sadrian#include <machine/bus.h> 41299994Sadrian 42302190Slandonf#include <dev/bhnd/cores/chipc/chipcreg.h> 43302190Slandonf 44299994Sadrian#include <dev/uart/uart.h> 45299994Sadrian#include <dev/uart/uart_bus.h> 46299994Sadrian#include <dev/uart/uart_cpu.h> 47299994Sadrian 48299994Sadrian#include "bcm_socinfo.h" 49299994Sadrian 50299994Sadrianbus_space_tag_t uart_bus_space_io; 51299994Sadrianbus_space_tag_t uart_bus_space_mem; 52299994Sadrian 53302190Slandonfstatic struct uart_class *chipc_uart_class = &uart_ns8250_class; 54302190Slandonf 55302190Slandonf#define CHIPC_UART_BAUDRATE 115200 56302190Slandonf 57299994Sadrianint 58299994Sadrianuart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 59299994Sadrian{ 60299994Sadrian return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0); 61299994Sadrian} 62299994Sadrian 63302190Slandonfstatic int 64302190Slandonfuart_cpu_init(struct uart_devinfo *di, int uart, int baudrate) 65299994Sadrian{ 66299994Sadrian struct bcm_socinfo *socinfo; 67299994Sadrian 68302190Slandonf if (uart >= CHIPC_UART_MAX) 69302190Slandonf return (EINVAL); 70302190Slandonf 71299994Sadrian socinfo = bcm_get_socinfo(); 72302190Slandonf di->ops = uart_getops(chipc_uart_class); 73299994Sadrian di->bas.chan = 0; 74302190Slandonf di->bas.bst = uart_bus_space_mem; 75302190Slandonf di->bas.bsh = (bus_space_handle_t) BCM_SOCREG(CHIPC_UART(uart)); 76299994Sadrian di->bas.regshft = 0; 77299994Sadrian di->bas.rclk = socinfo->uartrate; /* in Hz */ 78302190Slandonf di->baudrate = baudrate; 79299994Sadrian di->databits = 8; 80299994Sadrian di->stopbits = 1; 81299994Sadrian di->parity = UART_PARITY_NONE; 82302190Slandonf 83302190Slandonf return (0); 84302190Slandonf} 85302190Slandonf 86302190Slandonfint 87302190Slandonfuart_cpu_getdev(int devtype, struct uart_devinfo *di) 88302190Slandonf{ 89302190Slandonf int ivar; 90302190Slandonf 91299994Sadrian uart_bus_space_io = NULL; 92299994Sadrian uart_bus_space_mem = mips_bus_space_generic; 93302190Slandonf 94302190Slandonf /* Check the environment. */ 95302190Slandonf if (uart_getenv(devtype, di, chipc_uart_class) == 0) 96302190Slandonf return (0); 97302190Slandonf 98302190Slandonf /* Scan the device hints for the first matching device */ 99302190Slandonf for (int i = 0; i < CHIPC_UART_MAX; i++) { 100302190Slandonf if (resource_int_value("uart", i, "flags", &ivar)) 101302190Slandonf continue; 102302190Slandonf 103302190Slandonf /* Check usability */ 104302190Slandonf if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar)) 105302190Slandonf continue; 106302190Slandonf 107302190Slandonf if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar)) 108302190Slandonf continue; 109302190Slandonf 110302190Slandonf if (resource_int_value("uart", i, "disabled", &ivar) == 0 && 111302190Slandonf ivar == 0) 112302190Slandonf continue; 113302190Slandonf 114302190Slandonf /* Found */ 115302190Slandonf if (resource_int_value("uart", i, "baud", &ivar) != 0) 116302190Slandonf ivar = CHIPC_UART_BAUDRATE; 117302190Slandonf 118302190Slandonf return (uart_cpu_init(di, i, ivar)); 119302190Slandonf } 120302190Slandonf 121302190Slandonf /* Default to uart0/115200 */ 122302190Slandonf return (uart_cpu_init(di, 0, CHIPC_UART_BAUDRATE)); 123299994Sadrian} 124