/* $NetBSD: ralink_com.c,v 1.9 2019/01/12 15:44:08 thorpej Exp $ */ /*- * Copyright (c) 2011 CradlePoint Technology, Inc. * All rights reserved. * * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY CRADLEPOINT TECHNOLOGY, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 2006 Urbana-Champaign Independent Media Center. * Copyright (c) 2006 Garrett D'Amore. * All rights reserved. * * Portions of this code were written by Garrett D'Amore for the * Champaign-Urbana Community Wireless Network Project. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgements: * This product includes software developed by the Urbana-Champaign * Independent Media Center. * This product includes software developed by Garrett D'Amore. * 4. Urbana-Champaign Independent Media Center's name and Garrett * D'Amore's name may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /*- * Copyright (c) 1991 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)com.c 7.5 (Berkeley) 5/16/91 */ /* ralink_com.c -- Ralink 3052 uart console driver */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: ralink_com.c,v 1.9 2019/01/12 15:44:08 thorpej Exp $"); #include "locators.h" #include <sys/param.h> #include <sys/bus.h> #include <sys/device.h> #include <sys/kernel.h> #include <sys/systm.h> #include <sys/tty.h> #include <sys/termios.h> #include <sys/ttydefaults.h> #include <dev/cons.h> #include <dev/ic/comreg.h> #include <dev/ic/comvar.h> #include <mips/cpuregs.h> #include <mips/ralink/ralink_reg.h> #include <mips/ralink/ralink_var.h> struct ralink_com_softc { struct com_softc sc_com; void *sc_ih; bus_addr_t sc_addr; int sc_irq; }; static int ralink_com_match(device_t, cfdata_t , void *); static void ralink_com_attach(device_t, device_t, void *); static void ralink_com_init_regs(struct com_regs *regsp, bus_space_tag_t, bus_space_handle_t, bus_addr_t); CFATTACH_DECL_NEW(ralink_com, sizeof(struct ralink_com_softc), ralink_com_match, ralink_com_attach, NULL, NULL); #define CONMODE \ ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ #ifndef RALINK_CONADDR #define RALINK_CONADDR RA_UART_LITE_BASE /* default console is UART_LITE */ #endif /* address/irq/rst/gpiomode mappings */ static struct { bus_addr_t addr; int irq; uint32_t rst; uint32_t gpiomode; } ralink_uart_maps[] = { #ifdef MT7628 { RA_UART_LITE_BASE, RA_IRQ_UARTL, RST_UART0_7628, GPIO1MODE_UART0 }, { RA_UART1_BASE, RA_IRQ_UART1, RST_UART1_7628, GPIO1MODE_UART1 }, { RA_UART2_BASE, RA_IRQ_UART2, RST_UART2_7628, GPIO1MODE_UART2 }, #else { RA_UART_BASE, RA_IRQ_UARTF, RST_UART, GPIOMODE_UARTF0 }, { RA_UART_LITE_BASE, RA_IRQ_UARTL, RST_UARTL, GPIOMODE_UARTL } #endif }; static inline int ra_uart2irq(bus_addr_t addr) { int i; for (i = 0; __arraycount(ralink_uart_maps); i++) if (ralink_uart_maps[i].addr == addr) return ralink_uart_maps[i].irq; return -1; } static inline uint32_t ra_uart2rst(bus_addr_t addr) { int i; for (i = 0; __arraycount(ralink_uart_maps); i++) if (ralink_uart_maps[i].addr == addr) return ralink_uart_maps[i].rst; return 0; } static inline uint32_t ra_uart2gpiomode(bus_addr_t addr) { int i; for (i = 0; __arraycount(ralink_uart_maps); i++) if (ralink_uart_maps[i].addr == addr) return ralink_uart_maps[i].gpiomode; return 0; } static inline uint32_t sysctl_read(const u_int offset) { return *RA_IOREG_VADDR(RA_SYSCTL_BASE, offset); } static inline void sysctl_write(const u_int offset, uint32_t val) { *RA_IOREG_VADDR(RA_SYSCTL_BASE, offset) = val; } static inline uint32_t uart_read(const u_int offset) { return *RA_IOREG_VADDR(RALINK_CONADDR, offset); } static inline void uart_write(const u_int offset, const uint32_t val) { *RA_IOREG_VADDR(RALINK_CONADDR, offset) = val; } #ifdef RALINK_CONSOLE_EARLY static int ralink_cngetc(dev_t dv) { if ((uart_read(RA_UART_LSR) & LSR_RXRDY) == 0) return -1; return uart_read(RA_UART_RBR) & 0xff; } static void ralink_cnputc(dev_t dv, int c) { int timo = 150000; while ((uart_read(RA_UART_LSR) & LSR_TXRDY) == 0 && --timo > 0) ; uart_write(RA_UART_TBR, c); __asm __volatile("sync"); timo = 150000; while ((uart_read(RA_UART_LSR) & LSR_TSRE) == 0 && --timo > 0) ; } static struct consdev ralink_earlycons = { .cn_putc = ralink_cnputc, .cn_getc = ralink_cngetc, .cn_pollc = nullcnpollc, }; void ralink_console_early(void) { cn_tab = &ralink_earlycons; } #endif /* RALINK_CONSOLE_EARLY */ int ralink_com_match(device_t parent, cfdata_t cf, void *aux) { const struct mainbus_attach_args *ma; bus_addr_t addr; ma = aux; addr = ma->ma_addr; if (addr == MAINBUSCF_ADDR_DEFAULT) addr = RA_UART_LITE_BASE; if (ra_uart2irq(addr) < 0) return 0; if (cn_tab == NULL || cn_tab->cn_pri < CN_NORMAL) { printf("NULL console set, don't install ourselves " "(of course this shouldn't print)"); return 0; } /* * If we got this far, assume we want to install it as the console. * No need to probe. Future possibilities include checking to see if it * is console or KGDB but now it is our only console method if we aren't * forcing a null console */ return 1; } void ralink_com_attach(device_t parent, device_t self, void *aux) { const struct mainbus_attach_args *ma = aux; struct ralink_com_softc * const rtsc = device_private(self); struct com_softc * const sc = &rtsc->sc_com; bus_space_handle_t ioh; int error; /* opt addr and irq */ rtsc->sc_addr = ma->ma_addr; if (rtsc->sc_addr == MAINBUSCF_ADDR_DEFAULT) rtsc->sc_addr = RA_UART_LITE_BASE; rtsc->sc_irq = ra_uart2irq(rtsc->sc_addr); if ((error = bus_space_map(ma->ma_memt, rtsc->sc_addr, RA_UART_SIZE, 0, &ioh)) != 0) { aprint_error(": can't map registers, error=%d\n", error); return; } sc->sc_dev = self; sc->sc_frequency = RA_UART_FREQ; #if defined(MT7628) sc->sc_type = COM_TYPE_NORMAL; #else sc->sc_type = COM_TYPE_AU1x00; #endif sc->enabled = 1; /* reset hardware if not a console */ if (rtsc->sc_addr != RALINK_CONADDR) { uint32_t r; /* reset */ r = sysctl_read(RA_SYSCTL_RST); r |= ra_uart2rst(rtsc->sc_addr); sysctl_write(RA_SYSCTL_RST, r); r ^= ra_uart2rst(rtsc->sc_addr); sysctl_write(RA_SYSCTL_RST, r); /* make sure we are in UART mode */ r = sysctl_read(RA_SYSCTL_GPIOMODE); r &= ra_uart2gpiomode(rtsc->sc_addr); r |= __SHIFTIN(0, ra_uart2gpiomode(rtsc->sc_addr)); sysctl_write(RA_SYSCTL_GPIOMODE, r); } ralink_com_init_regs(&sc->sc_regs, ma->ma_memt, ioh, rtsc->sc_addr); rtsc->sc_ih = ra_intr_establish(rtsc->sc_irq, comintr, sc, 1); com_attach_subr(sc); } static const bus_size_t ralink_com_regmap[COM_REGMAP_NENTRIES] = { [COM_REG_RXDATA] = RA_UART_RBR, [COM_REG_TXDATA] = RA_UART_TBR, [COM_REG_DLBL] = RA_UART_DLL, #if defined(MT7628) [COM_REG_DLBH] = RA_UART_DLM, #endif [COM_REG_IER] = RA_UART_IER, [COM_REG_IIR] = RA_UART_IIR, [COM_REG_FIFO] = RA_UART_FCR, [COM_REG_TCR] = RA_UART_FCR, [COM_REG_LCR] = RA_UART_LCR, [COM_REG_MCR] = RA_UART_MCR, [COM_REG_LSR] = RA_UART_LSR, [COM_REG_MSR] = RA_UART_MSR, }; static void ralink_com_init_regs(struct com_regs *regsp, bus_space_tag_t st, bus_space_handle_t sh, bus_addr_t addr) { com_init_regs(regsp, st, sh, addr); memcpy(regsp->cr_map, ralink_com_regmap, sizeof(regsp->cr_map)); regsp->cr_nports = 32; } void ralink_com_early(int silent) { struct com_regs regs; bus_space_handle_t bsh; uint32_t r; int error; /* reset */ r = sysctl_read(RA_SYSCTL_RST); r |= ra_uart2rst(RALINK_CONADDR); sysctl_write(RA_SYSCTL_RST, r); r ^= ra_uart2rst(RALINK_CONADDR); sysctl_write(RA_SYSCTL_RST, r); if (silent) { /* * put us in PIO mode, * effectively tri-stating the UARTL block */ r = sysctl_read(RA_SYSCTL_GPIOMODE); r &= ra_uart2gpiomode(RALINK_CONADDR); r |= __SHIFTIN(1, ra_uart2gpiomode(RALINK_CONADDR)); sysctl_write(RA_SYSCTL_GPIOMODE, r); } else { /* make sure we are in UART mode */ r = sysctl_read(RA_SYSCTL_GPIOMODE); r &= ra_uart2gpiomode(RALINK_CONADDR); r |= __SHIFTIN(0, ra_uart2gpiomode(RALINK_CONADDR)); sysctl_write(RA_SYSCTL_GPIOMODE, r); } uart_write(RA_UART_IER, 0); /* disable interrupts */ uart_write(RA_UART_FCR, 0); /* disable fifos */ /* set baud rate */ uart_write(RA_UART_LCR, UART_LCR_WLS0 | UART_LCR_WLS1 | UART_LCR_DLAB); uart_write(RA_UART_DLL, (RA_UART_FREQ / RA_SERIAL_CLKDIV / RA_BAUDRATE) & 0xffff); #if defined(MT7628) uart_write(RA_UART_DLM, ((RA_UART_FREQ / RA_SERIAL_CLKDIV / RA_BAUDRATE) & 0xffff) >> 8); #endif uart_write(RA_UART_LCR, UART_LCR_WLS0 | UART_LCR_WLS1); if ((error = bus_space_map(&ra_bus_memt, RALINK_CONADDR, 32, 0, &bsh)) != 0) { return; } ralink_com_init_regs(®s, &ra_bus_memt, bsh, RALINK_CONADDR); #if defined(MT7628) comcnattach1(®s, RA_BAUDRATE, RA_UART_FREQ, COM_TYPE_NORMAL, CONMODE); #else /* Ralink UART has a 16-bit rate latch (like the AU1x00) */ comcnattach1(®s, RA_BAUDRATE, RA_UART_FREQ, COM_TYPE_AU1x00, CONMODE); #endif }
