uart_cpu_octeonusart.c revision 202985
1/*- 2 * Copyright (c) 2009 M. Warner Losh <imp@FreeBSD.org> 3 * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $Id$ 28 */ 29#include "opt_uart.h" 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sys/mips/cavium/uart_cpu_octeonusart.c 202985 2010-01-25 19:27:20Z imp $"); 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/bus.h> 37#include <sys/cons.h> 38 39#include <machine/bus.h> 40 41#include <dev/uart/uart.h> 42#include <dev/uart/uart_cpu.h> 43 44#include <mips/cavium/octeon_pcmap_regs.h> 45 46bus_space_tag_t uart_bus_space_io; 47bus_space_tag_t uart_bus_space_mem; 48 49#include <sys/cdefs.h> 50__FBSDID("$FreeBSD: head/sys/mips/cavium/uart_cpu_octeonusart.c 202985 2010-01-25 19:27:20Z imp $"); 51 52#include <sys/param.h> 53#include <sys/systm.h> 54#include <sys/bus.h> 55#include <sys/kernel.h> 56#include <sys/malloc.h> 57#include <sys/ktr.h> 58 59#include <vm/vm.h> 60#include <vm/pmap.h> 61#include <vm/vm_kern.h> 62#include <vm/vm_extern.h> 63 64#include <machine/bus.h> 65#include <machine/cache.h> 66 67/* 68 * Specailized uart bus space. We present a 1 apart byte oriented 69 * bus to the outside world, but internally translate to/from the 8-apart 70 * 64-bit word bus that's on the octeon. We only support simple read/write 71 * in this space. Everything else is undefined. 72 */ 73static uint8_t 74ou_bs_r_1(void *t, bus_space_handle_t handle, bus_size_t offset) 75{ 76 77 return (oct_read64(handle + (offset << 3))); 78} 79 80static uint16_t 81ou_bs_r_2(void *t, bus_space_handle_t handle, bus_size_t offset) 82{ 83 84 return (oct_read64(handle + (offset << 3))); 85} 86 87static uint32_t 88ou_bs_r_4(void *t, bus_space_handle_t handle, bus_size_t offset) 89{ 90 91 return (oct_read64(handle + (offset << 3))); 92} 93 94static uint64_t 95ou_bs_r_8(void *t, bus_space_handle_t handle, bus_size_t offset) 96{ 97 98 return (oct_read64(handle + (offset << 3))); 99} 100 101static void 102ou_bs_w_1(void *t, bus_space_handle_t bsh, bus_size_t offset, uint8_t value) 103{ 104 105 oct_write64(bsh + (offset << 3), value); 106} 107 108static void 109ou_bs_w_2(void *t, bus_space_handle_t bsh, bus_size_t offset, uint16_t value) 110{ 111 112 oct_write64(bsh + (offset << 3), value); 113} 114 115static void 116ou_bs_w_4(void *t, bus_space_handle_t bsh, bus_size_t offset, uint32_t value) 117{ 118 119 oct_write64(bsh + (offset << 3), value); 120} 121 122static void 123ou_bs_w_8(void *t, bus_space_handle_t bsh, bus_size_t offset, uint64_t value) 124{ 125 126 oct_write64(bsh + (offset << 3), value); 127} 128 129struct bus_space octeon_uart_tag = { 130 .bs_map = generic_bs_map, 131 .bs_unmap = generic_bs_unmap, 132 .bs_subregion = generic_bs_subregion, 133 .bs_barrier = generic_bs_barrier, 134 .bs_r_1 = ou_bs_r_1, 135 .bs_r_2 = ou_bs_r_2, 136 .bs_r_4 = ou_bs_r_4, 137 .bs_r_8 = ou_bs_r_8, 138 .bs_w_1 = ou_bs_w_1, 139 .bs_w_2 = ou_bs_w_2, 140 .bs_w_4 = ou_bs_w_4, 141 .bs_w_8 = ou_bs_w_8, 142}; 143 144extern struct uart_class uart_oct16550_class; 145 146int 147uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 148{ 149 150 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0); 151} 152 153int 154uart_cpu_getdev(int devtype, struct uart_devinfo *di) 155{ 156 struct uart_class *class = &uart_oct16550_class; 157 158 /* 159 * These fields need to be setup corretly for uart_getenv to 160 * work in all cases. 161 */ 162 uart_bus_space_io = NULL; /* No io map for this device */ 163 uart_bus_space_mem = &octeon_uart_tag; 164 di->bas.bst = uart_bus_space_mem; 165 166 /* 167 * If env specification for UART exists it takes precedence: 168 * hw.uart.console="mm:0xf1012000" or similar 169 */ 170 if (uart_getenv(devtype, di, class) == 0) 171 return (0); 172 173 /* 174 * Fallback to UART0 for console. 175 */ 176 di->ops = uart_getops(class); 177 di->bas.chan = 0; 178 if (bus_space_map(di->bas.bst, OCTEON_MIO_UART0, OCTEON_MIO_UART_SIZE, 179 0, &di->bas.bsh) != 0) 180 return (ENXIO); 181 di->bas.regshft = 0; 182 di->bas.rclk = 0; 183 di->baudrate = 115200; 184 di->databits = 8; 185 di->stopbits = 1; 186 di->parity = UART_PARITY_NONE; 187 188 return (0); 189} 190