1/* $NetBSD: imx_com.c,v 1.3 2021/01/27 03:10:20 thorpej Exp $ */ 2/*- 3 * Copyright (c) 2019 Genetec Corporation. All rights reserved. 4 * Written by Hashimoto Kenichi for Genetec Corporation. 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 ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * 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 28#include <sys/cdefs.h> 29__KERNEL_RCSID(0, "$NetBSD: imx_com.c,v 1.3 2021/01/27 03:10:20 thorpej Exp $"); 30 31#include "opt_fdt.h" 32#include "opt_imxuart.h" 33 34#include <sys/param.h> 35#include <sys/bus.h> 36#include <sys/device.h> 37 38#include <dev/fdt/fdtvar.h> 39 40#include <arm/imx/imxuartreg.h> 41#include <arm/imx/imxuartvar.h> 42 43static int imx_com_match(device_t, struct cfdata *, void *); 44static void imx_com_attach(device_t, device_t, void *); 45 46CFATTACH_DECL_NEW(imx_com, sizeof(struct imxuart_softc), 47 imx_com_match, imx_com_attach, NULL, NULL); 48 49static const struct device_compatible_entry compat_data[] = { 50 { .compat = "fsl,imx6q-uart" }, 51 DEVICE_COMPAT_EOL 52}; 53 54static int 55imx_com_match(device_t parent, struct cfdata *cf, void *aux) 56{ 57 struct fdt_attach_args * const faa = aux; 58 59 return of_compatible_match(faa->faa_phandle, compat_data); 60} 61 62static void 63imx_com_attach(device_t parent, device_t self, void *aux) 64{ 65 struct imxuart_softc *sc = device_private(self); 66 struct imxuart_regs *regsp = &sc->sc_regs; 67 struct fdt_attach_args *faa = aux; 68 const int phandle = faa->faa_phandle; 69 bus_space_tag_t bst = faa->faa_bst; 70 bus_space_handle_t bsh; 71 char intrstr[128]; 72 struct clk *per; 73 bus_addr_t addr; 74 bus_size_t size; 75 76 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 77 aprint_error(": couldn't get registers\n"); 78 return; 79 } 80 81 if (bus_space_map(bst, addr, size, 0, &bsh) != 0) { 82 aprint_error(": couldn't map registers\n"); 83 return; 84 } 85 86 if (fdtbus_clock_enable(phandle, "ipg", false) != 0) { 87 aprint_error(": couldn't enable ipg clock\n"); 88 return; 89 } 90 91 per = fdtbus_clock_get(phandle, "per"); 92 if (per != NULL && clk_enable(per) != 0) { 93 aprint_error(": couldn't enable per clock\n"); 94 return; 95 } 96 97 sc->sc_dev = self; 98 regsp->ur_iot = bst; 99 regsp->ur_iobase = addr; 100 regsp->ur_ioh = bsh; 101 102 if (per != NULL) { 103 aprint_normal(", %u Hz", clk_get_rate(per)); 104 /* XXX */ 105 imxuart_set_frequency(clk_get_rate(per), 2); 106 } 107 108 if (imxuart_is_console(regsp->ur_iot, regsp->ur_iobase, ®sp->ur_ioh)) 109 aprint_normal(" (console)"); 110 111 aprint_normal("\n"); 112 113 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 114 aprint_error_dev(self, "failed to decode interrupt\n"); 115 return; 116 } 117 118 sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_SERIAL, 119 0, imxuintr, sc, device_xname(self)); 120 if (sc->sc_ih == NULL) { 121 aprint_error_dev(self, "failed to establish interrupt\n"); 122 return; 123 } 124 125 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 126 127 imxuart_attach_subr(sc); 128} 129 130/* 131 * Console support 132 */ 133 134static int 135imx_com_console_match(int phandle) 136{ 137 return of_compatible_match(phandle, compat_data); 138} 139 140static void 141imx_com_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 142{ 143 const int phandle = faa->faa_phandle; 144 bus_space_tag_t bst = faa->faa_bst; 145 bus_addr_t addr; 146 bus_size_t size; 147 tcflag_t flags; 148 int speed; 149 150 fdtbus_get_reg(phandle, 0, &addr, &size); 151 speed = fdtbus_get_stdout_speed(); 152 if (speed < 0) 153 speed = 115200; /* default */ 154 flags = fdtbus_get_stdout_flags(); 155 156 imxuart_set_frequency(uart_freq, 2); 157 if (imxuart_cnattach(bst, addr, speed, flags) != 0) 158 panic("cannot attach console UART"); 159} 160 161static const struct fdt_console imx_com_console = { 162 .match = imx_com_console_match, 163 .consinit = imx_com_console_consinit, 164}; 165 166FDT_CONSOLE(imx_com, &imx_com_console); 167