1 /* $OpenBSD: com_leioc.c,v 1.2 2017/02/19 10:18:41 visa Exp $ */ 2 3 /* 4 * Copyright (c) 2016 Visa Hankala 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/conf.h> 22 #include <sys/device.h> 23 #include <sys/termios.h> 24 #include <sys/tty.h> 25 26 #include <machine/autoconf.h> 27 #include <machine/bus.h> 28 #include <machine/loongson3.h> 29 30 #include <dev/ic/comreg.h> 31 #include <dev/ic/comvar.h> 32 33 #include <loongson/dev/leiocreg.h> 34 #include <loongson/dev/leiocvar.h> 35 36 #define UART_FREQ 33000000 37 #define UART_RATE 115200 38 39 int com_leioc_match(struct device *, void *, void *); 40 void com_leioc_attach(struct device *, struct device *, void *); 41 int com_leioc_intr(void *); 42 43 const struct cfattach com_leioc_ca = { 44 sizeof(struct com_softc), com_leioc_match, com_leioc_attach 45 }; 46 47 extern struct cfdriver com_cd; 48 49 int 50 com_leioc_match(struct device *parent, void *match, void *aux) 51 { 52 struct leioc_attach_args *laa = aux; 53 54 if (strcmp(laa->laa_name, com_cd.cd_name) == 0) 55 return 1; 56 57 return 0; 58 } 59 60 void 61 com_leioc_attach(struct device *parent, struct device *self, void *aux) 62 { 63 struct leioc_attach_args *laa = aux; 64 struct com_softc *sc = (void *)self; 65 int console = 0; 66 67 if (comconsiot == &leioc_io_space_tag && comconsaddr == laa->laa_base) 68 console = 1; 69 70 sc->sc_hwflags = 0; 71 sc->sc_swflags = 0; 72 sc->sc_frequency = UART_FREQ; 73 74 if (!console || comconsattached) { 75 sc->sc_iot = &leioc_io_space_tag; 76 sc->sc_iobase = laa->laa_base; 77 if (bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS, 0, 78 &sc->sc_ioh)) { 79 printf(": could not map UART registers\n"); 80 return; 81 } 82 } else { 83 /* Reuse the early console settings. */ 84 sc->sc_iot = comconsiot; 85 sc->sc_iobase = comconsaddr; 86 if (comcnattach(sc->sc_iot, sc->sc_iobase, comconsrate, 87 sc->sc_frequency, comconscflag)) 88 panic("could not set up serial console"); 89 sc->sc_ioh = comconsioh; 90 } 91 92 com_attach_subr(sc); 93 94 loongson3_intr_establish(LS3_IRQ_LPC, IPL_TTY, com_leioc_intr, sc, 95 sc->sc_dev.dv_xname); 96 } 97 98 int 99 com_leioc_intr(void *arg) 100 { 101 comintr(arg); 102 103 /* 104 * Always return non-zero to prevent console clutter about spurious 105 * interrupts. comstart() enables the transmitter holding register 106 * empty interrupt before adding data to the FIFO, which can trigger 107 * a premature interrupt on the primary CPU in a multiprocessor system. 108 */ 109 return 1; 110 } 111 112 void 113 leioc_cons_setup(void) 114 { 115 comconsiot = &leioc_io_space_tag; 116 comconsaddr = LEIOC_UART0_BASE; 117 comconsfreq = UART_FREQ; 118 comconsrate = UART_RATE; 119 comconscflag = (TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | 120 CS8 | CLOCAL; 121 } 122