1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org> All rights reserved. 5 * Copyright (c) 2009 M. Warner Losh <imp@FreeBSD.org> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 * 28 * $Id$ 29 */ 30#include "opt_uart.h" 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD$"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/bus.h> 38#include <sys/cons.h> 39 40#include <machine/bus.h> 41 42#include <dev/uart/uart.h> 43#include <dev/uart/uart_cpu.h> 44 45#include <mips/cavium/octeon_pcmap_regs.h> 46 47#include <contrib/octeon-sdk/cvmx.h> 48 49bus_space_tag_t uart_bus_space_io; 50bus_space_tag_t uart_bus_space_mem; 51 52/* 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. 57 */ 58static uint8_t 59ou_bs_r_1(void *t, bus_space_handle_t handle, bus_size_t offset) 60{ 61 62 return (cvmx_read64_uint64(handle + offset)); 63} 64 65static uint16_t 66ou_bs_r_2(void *t, bus_space_handle_t handle, bus_size_t offset) 67{ 68 69 return (cvmx_read64_uint64(handle + offset)); 70} 71 72static uint32_t 73ou_bs_r_4(void *t, bus_space_handle_t handle, bus_size_t offset) 74{ 75 76 return (cvmx_read64_uint64(handle + offset)); 77} 78 79static uint64_t 80ou_bs_r_8(void *t, bus_space_handle_t handle, bus_size_t offset) 81{ 82 83 return (cvmx_read64_uint64(handle + offset)); 84} 85 86static void 87ou_bs_w_1(void *t, bus_space_handle_t bsh, bus_size_t offset, uint8_t value) 88{ 89 90 cvmx_write64_uint64(bsh + offset, value); 91} 92 93static void 94ou_bs_w_2(void *t, bus_space_handle_t bsh, bus_size_t offset, uint16_t value) 95{ 96 97 cvmx_write64_uint64(bsh + offset, value); 98} 99 100static void 101ou_bs_w_4(void *t, bus_space_handle_t bsh, bus_size_t offset, uint32_t value) 102{ 103 104 cvmx_write64_uint64(bsh + offset, value); 105} 106 107static void 108ou_bs_w_8(void *t, bus_space_handle_t bsh, bus_size_t offset, uint64_t value) 109{ 110 111 cvmx_write64_uint64(bsh + offset, value); 112} 113 114struct 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, 119 .bs_r_1 = ou_bs_r_1, 120 .bs_r_2 = ou_bs_r_2, 121 .bs_r_4 = ou_bs_r_4, 122 .bs_r_8 = ou_bs_r_8, 123 .bs_w_1 = ou_bs_w_1, 124 .bs_w_2 = ou_bs_w_2, 125 .bs_w_4 = ou_bs_w_4, 126 .bs_w_8 = ou_bs_w_8, 127}; 128 129extern struct uart_class uart_oct16550_class; 130 131int 132uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 133{ 134 135 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0); 136} 137 138int 139uart_cpu_getdev(int devtype, struct uart_devinfo *di) 140{ 141 struct uart_class *class = &uart_oct16550_class; 142 143 /* 144 * These fields need to be setup corretly for uart_getenv to 145 * work in all cases. 146 */ 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; 150 151 /* 152 * If env specification for UART exists it takes precedence: 153 * hw.uart.console="mm:0xf1012000" or similar 154 */ 155 if (uart_getenv(devtype, di, class) == 0) 156 return (0); 157 158 /* 159 * Fallback to UART0 for console. 160 */ 161 di->ops = uart_getops(class); 162 di->bas.chan = 0; 163 /* XXX */ 164 if (bus_space_map(di->bas.bst, CVMX_MIO_UARTX_RBR(0), 165 uart_getrange(class), 0, &di->bas.bsh) != 0) 166 return (ENXIO); 167 di->bas.regshft = 3; 168 di->bas.rclk = 0; 169 di->baudrate = 115200; 170 di->databits = 8; 171 di->stopbits = 1; 172 di->parity = UART_PARITY_NONE; 173 174 return (0); 175} 176