1 /* $NetBSD: imx_com.c,v 1.4 2025/09/06 22:53:47 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 1.4 2025/09/06 22:53:47 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 #include <dev/fdt/fdt_console.h> 40 41 #include <arm/imx/imxuartreg.h> 42 #include <arm/imx/imxuartvar.h> 43 44 static int imx_com_match(device_t, struct cfdata *, void *); 45 static void imx_com_attach(device_t, device_t, void *); 46 47 CFATTACH_DECL_NEW(imx_com, sizeof(struct imxuart_softc), 48 imx_com_match, imx_com_attach, NULL, NULL); 49 50 static const struct device_compatible_entry compat_data[] = { 51 { .compat = "fsl,imx6q-uart" }, 52 DEVICE_COMPAT_EOL 53 }; 54 55 static int 56 imx_com_match(device_t parent, struct cfdata *cf, void *aux) 57 { 58 struct fdt_attach_args * const faa = aux; 59 60 return of_compatible_match(faa->faa_phandle, compat_data); 61 } 62 63 static void 64 imx_com_attach(device_t parent, device_t self, void *aux) 65 { 66 struct imxuart_softc *sc = device_private(self); 67 struct imxuart_regs *regsp = &sc->sc_regs; 68 struct fdt_attach_args *faa = aux; 69 const int phandle = faa->faa_phandle; 70 bus_space_tag_t bst = faa->faa_bst; 71 bus_space_handle_t bsh; 72 char intrstr[128]; 73 struct clk *per; 74 bus_addr_t addr; 75 bus_size_t size; 76 77 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 78 aprint_error(": couldn't get registers\n"); 79 return; 80 } 81 82 if (bus_space_map(bst, addr, size, 0, &bsh) != 0) { 83 aprint_error(": couldn't map registers\n"); 84 return; 85 } 86 87 if (fdtbus_clock_enable(phandle, "ipg", false) != 0) { 88 aprint_error(": couldn't enable ipg clock\n"); 89 return; 90 } 91 92 per = fdtbus_clock_get(phandle, "per"); 93 if (per != NULL && clk_enable(per) != 0) { 94 aprint_error(": couldn't enable per clock\n"); 95 return; 96 } 97 98 sc->sc_dev = self; 99 regsp->ur_iot = bst; 100 regsp->ur_iobase = addr; 101 regsp->ur_ioh = bsh; 102 103 if (per != NULL) { 104 aprint_normal(", %u Hz", clk_get_rate(per)); 105 /* XXX */ 106 imxuart_set_frequency(clk_get_rate(per), 2); 107 } 108 109 if (imxuart_is_console(regsp->ur_iot, regsp->ur_iobase, ®sp->ur_ioh)) 110 aprint_normal(" (console)"); 111 112 aprint_normal("\n"); 113 114 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 115 aprint_error_dev(self, "failed to decode interrupt\n"); 116 return; 117 } 118 119 sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_SERIAL, 120 0, imxuintr, sc, device_xname(self)); 121 if (sc->sc_ih == NULL) { 122 aprint_error_dev(self, "failed to establish interrupt\n"); 123 return; 124 } 125 126 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 127 128 imxuart_attach_subr(sc); 129 } 130 131 /* 132 * Console support 133 */ 134 135 static int 136 imx_com_console_match(int phandle) 137 { 138 return of_compatible_match(phandle, compat_data); 139 } 140 141 static void 142 imx_com_console_consinit(struct fdt_attach_args *faa, u_int uart_freq) 143 { 144 const int phandle = faa->faa_phandle; 145 bus_space_tag_t bst = faa->faa_bst; 146 bus_addr_t addr; 147 bus_size_t size; 148 tcflag_t flags; 149 int speed; 150 151 fdtbus_get_reg(phandle, 0, &addr, &size); 152 speed = fdtbus_get_stdout_speed(); 153 if (speed < 0) 154 speed = 115200; /* default */ 155 flags = fdtbus_get_stdout_flags(); 156 157 imxuart_set_frequency(uart_freq, 2); 158 if (imxuart_cnattach(bst, addr, speed, flags) != 0) 159 panic("cannot attach console UART"); 160 } 161 162 static const struct fdt_console imx_com_console = { 163 .match = imx_com_console_match, 164 .consinit = imx_com_console_consinit, 165 }; 166 167 FDT_CONSOLE(imx_com, &imx_com_console); 168
Indexes created Sun Sep 21 20:09:37 GMT 2025