2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org> All rights reserved.
5 * Copyright (c) 2009 M. Warner Losh <imp@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
40 #include <machine/bus.h>
42 #include <dev/uart/uart.h>
43 #include <dev/uart/uart_cpu.h>
45 #include <mips/cavium/octeon_pcmap_regs.h>
47 #include <contrib/octeon-sdk/cvmx.h>
49 bus_space_tag_t uart_bus_space_io;
50 bus_space_tag_t uart_bus_space_mem;
53 * Specailized uart bus space. We present a 1 apart byte oriented
54 * bus to the outside world, but internally translate to/from the 8-apart
55 * 64-bit word bus that's on the octeon. We only support simple read/write
56 * in this space. Everything else is undefined.
59 ou_bs_r_1(void *t, bus_space_handle_t handle, bus_size_t offset)
62 return (cvmx_read64_uint64(handle + offset));
66 ou_bs_r_2(void *t, bus_space_handle_t handle, bus_size_t offset)
69 return (cvmx_read64_uint64(handle + offset));
73 ou_bs_r_4(void *t, bus_space_handle_t handle, bus_size_t offset)
76 return (cvmx_read64_uint64(handle + offset));
80 ou_bs_r_8(void *t, bus_space_handle_t handle, bus_size_t offset)
83 return (cvmx_read64_uint64(handle + offset));
87 ou_bs_w_1(void *t, bus_space_handle_t bsh, bus_size_t offset, uint8_t value)
90 cvmx_write64_uint64(bsh + offset, value);
94 ou_bs_w_2(void *t, bus_space_handle_t bsh, bus_size_t offset, uint16_t value)
97 cvmx_write64_uint64(bsh + offset, value);
101 ou_bs_w_4(void *t, bus_space_handle_t bsh, bus_size_t offset, uint32_t value)
104 cvmx_write64_uint64(bsh + offset, value);
108 ou_bs_w_8(void *t, bus_space_handle_t bsh, bus_size_t offset, uint64_t value)
111 cvmx_write64_uint64(bsh + offset, value);
114 struct bus_space octeon_uart_tag = {
115 .bs_map = generic_bs_map,
116 .bs_unmap = generic_bs_unmap,
117 .bs_subregion = generic_bs_subregion,
118 .bs_barrier = generic_bs_barrier,
129 extern struct uart_class uart_oct16550_class;
132 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
135 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
139 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
141 struct uart_class *class = &uart_oct16550_class;
144 * These fields need to be setup corretly for uart_getenv to
147 uart_bus_space_io = NULL; /* No io map for this device */
148 uart_bus_space_mem = &octeon_uart_tag;
149 di->bas.bst = uart_bus_space_mem;
152 * If env specification for UART exists it takes precedence:
153 * hw.uart.console="mm:0xf1012000" or similar
155 if (uart_getenv(devtype, di, class) == 0)
159 * Fallback to UART0 for console.
161 di->ops = uart_getops(class);
164 if (bus_space_map(di->bas.bst, CVMX_MIO_UARTX_RBR(0),
165 uart_getrange(class), 0, &di->bas.bsh) != 0)
169 di->baudrate = 115200;
172 di->parity = UART_PARITY_NONE;