2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009 M. Warner Losh <imp@FreeBSD.org>
5 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
41 #include <machine/bus.h>
43 #include <dev/uart/uart.h>
44 #include <dev/uart/uart_cpu.h>
46 #include <mips/cavium/octeon_pcmap_regs.h>
48 #include <contrib/octeon-sdk/cvmx.h>
50 bus_space_tag_t uart_bus_space_io;
51 bus_space_tag_t uart_bus_space_mem;
54 * Specailized uart bus space. We present a 1 apart byte oriented
55 * bus to the outside world, but internally translate to/from the 8-apart
56 * 64-bit word bus that's on the octeon. We only support simple read/write
57 * in this space. Everything else is undefined.
60 ou_bs_r_1(void *t, bus_space_handle_t handle, bus_size_t offset)
63 return (cvmx_read64_uint64(handle + offset));
67 ou_bs_r_2(void *t, bus_space_handle_t handle, bus_size_t offset)
70 return (cvmx_read64_uint64(handle + offset));
74 ou_bs_r_4(void *t, bus_space_handle_t handle, bus_size_t offset)
77 return (cvmx_read64_uint64(handle + offset));
81 ou_bs_r_8(void *t, bus_space_handle_t handle, bus_size_t offset)
84 return (cvmx_read64_uint64(handle + offset));
88 ou_bs_w_1(void *t, bus_space_handle_t bsh, bus_size_t offset, uint8_t value)
91 cvmx_write64_uint64(bsh + offset, value);
95 ou_bs_w_2(void *t, bus_space_handle_t bsh, bus_size_t offset, uint16_t value)
98 cvmx_write64_uint64(bsh + offset, value);
102 ou_bs_w_4(void *t, bus_space_handle_t bsh, bus_size_t offset, uint32_t value)
105 cvmx_write64_uint64(bsh + offset, value);
109 ou_bs_w_8(void *t, bus_space_handle_t bsh, bus_size_t offset, uint64_t value)
112 cvmx_write64_uint64(bsh + offset, value);
115 struct bus_space octeon_uart_tag = {
116 .bs_map = generic_bs_map,
117 .bs_unmap = generic_bs_unmap,
118 .bs_subregion = generic_bs_subregion,
119 .bs_barrier = generic_bs_barrier,
130 extern struct uart_class uart_oct16550_class;
133 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
136 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
140 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
142 struct uart_class *class = &uart_oct16550_class;
145 * These fields need to be setup corretly for uart_getenv to
148 uart_bus_space_io = NULL; /* No io map for this device */
149 uart_bus_space_mem = &octeon_uart_tag;
150 di->bas.bst = uart_bus_space_mem;
153 * If env specification for UART exists it takes precedence:
154 * hw.uart.console="mm:0xf1012000" or similar
156 if (uart_getenv(devtype, di, class) == 0)
160 * Fallback to UART0 for console.
162 di->ops = uart_getops(class);
165 if (bus_space_map(di->bas.bst, CVMX_MIO_UARTX_RBR(0),
166 uart_getrange(class), 0, &di->bas.bsh) != 0)
170 di->baudrate = 115200;
173 di->parity = UART_PARITY_NONE;