2 * Copyright (c) 2012, Adrian Chadd <adrian@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
37 #include <machine/bus.h>
39 #include <dev/uart/uart.h>
40 #include <dev/uart/uart_cpu.h>
41 #include <dev/uart/uart_bus.h>
43 #include <mips/atheros/ar71xxreg.h>
44 #include <mips/atheros/ar71xx_cpudef.h>
46 #include <mips/atheros/uart_dev_ar933x.h>
48 #include <mips/atheros/ar933x_uart.h>
53 static int uart_ar933x_probe(device_t dev);
54 extern struct uart_class uart_ar933x_uart_class;
56 static device_method_t uart_ar933x_methods[] = {
57 /* Device interface */
58 DEVMETHOD(device_probe, uart_ar933x_probe),
59 DEVMETHOD(device_attach, uart_bus_attach),
60 DEVMETHOD(device_detach, uart_bus_detach),
64 static driver_t uart_ar933x_driver = {
67 sizeof(struct uart_softc),
70 extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
73 uart_ar933x_probe(device_t dev)
75 struct uart_softc *sc;
78 freq = ar71xx_uart_freq();
80 sc = device_get_softc(dev);
81 sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
82 sc->sc_class = &uart_ar933x_class;
83 bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
84 sc->sc_sysdev->bas.regshft = 0;
85 sc->sc_sysdev->bas.bst = mips_bus_space_generic;
86 sc->sc_sysdev->bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR);
87 sc->sc_bas.regshft = 0;
88 sc->sc_bas.bst = mips_bus_space_generic;
89 sc->sc_bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR);
91 return (uart_bus_probe(dev, 2, 0, freq, 0, 0));
95 * Assume the UART is setup by the bootloader and just echo that.
97 #if defined(EARLY_PRINTF)
99 ar933x_early_putc(int c)
103 /* Wait until FIFO is clear */
104 while ((i > 0) && (ATH_READ_REG(AR71XX_UART_ADDR + AR933X_UART_CS_REG) &
105 AR933X_UART_CS_TX_BUSY))
109 ATH_WRITE_REG(AR71XX_UART_ADDR + AR933X_UART_DATA_REG,
110 (c & 0xff)| AR933X_UART_DATA_TX_CSR);
112 early_putc_t *early_putc = ar933x_early_putc;
113 #endif /* EARLY_PRINTF */
115 DRIVER_MODULE(uart, apb, uart_ar933x_driver, uart_devclass, 0, 0);