2 * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
38 #include <sys/mutex.h>
40 #include <machine/bus.h>
42 #include <dev/bhnd/cores/chipc/chipcreg.h>
44 #include <dev/uart/uart.h>
45 #include <dev/uart/uart_bus.h>
46 #include <dev/uart/uart_cpu.h>
48 #include "bcm_socinfo.h"
51 #include <dev/cfe/cfe_api.h>
52 #include <dev/cfe/cfe_ioctl.h>
53 #include <dev/cfe/cfe_error.h>
56 bus_space_tag_t uart_bus_space_io;
57 bus_space_tag_t uart_bus_space_mem;
59 static struct uart_class *chipc_uart_class = &uart_ns8250_class;
61 #define CHIPC_UART_BAUDRATE 115200
64 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
66 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
70 uart_cpu_init(struct uart_devinfo *di, u_int uart, int baudrate)
72 struct bcm_socinfo *socinfo;
74 if (uart >= CHIPC_UART_MAX)
77 socinfo = bcm_get_socinfo();
78 di->ops = uart_getops(chipc_uart_class);
80 di->bas.bst = uart_bus_space_mem;
81 di->bas.bsh = (bus_space_handle_t) BCM_SOCREG(CHIPC_UART(uart));
83 di->bas.rclk = socinfo->uartrate; /* in Hz */
84 di->baudrate = baudrate;
87 di->parity = UART_PARITY_NONE;
94 uart_getenv_cfe(int devtype, struct uart_devinfo *di)
96 char device[sizeof("uartXX")];
101 /* CFE only vends console configuration */
102 if (devtype != UART_DEV_CONSOLE)
105 /* Fetch console device */
106 ret = cfe_getenv("BOOT_CONSOLE", device, sizeof(device));
110 /* Parse serial console unit. Fails on non-uart devices. */
111 if (sscanf(device, "uart%u", &uart) != 1)
114 /* Fetch device handle */
115 fd = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
119 /* Fetch serial configuration */
120 ret = cfe_ioctl(fd, IOCTL_SERIAL_GETSPEED, (unsigned char *)&baud,
121 sizeof(baud), &len, 0);
123 baud = CHIPC_UART_BAUDRATE;
125 /* Initialize device info */
126 return (uart_cpu_init(di, uart, baud));
131 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
135 uart_bus_space_io = NULL;
136 uart_bus_space_mem = mips_bus_space_generic;
139 /* Check the CFE environment */
140 if (uart_getenv_cfe(devtype, di) == 0)
144 /* Check the kernel environment. */
145 if (uart_getenv(devtype, di, chipc_uart_class) == 0)
148 /* Scan the device hints for the first matching device */
149 for (u_int i = 0; i < CHIPC_UART_MAX; i++) {
150 if (resource_int_value("uart", i, "flags", &ivar))
153 /* Check usability */
154 if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
157 if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
160 if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
165 if (resource_int_value("uart", i, "baud", &ivar) != 0)
166 ivar = CHIPC_UART_BAUDRATE;
168 return (uart_cpu_init(di, i, ivar));
171 /* Default to uart0/115200 */
172 return (uart_cpu_init(di, 0, CHIPC_UART_BAUDRATE));