1 /* $NetBSD: gtmr_fdt.c,v 1.10 2021/04/24 23:36:26 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: gtmr_fdt.c,v 1.10 2021/04/24 23:36:26 thorpej Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/intr.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/kmem.h> 39 40 #include <arm/cortex/gtmr_intr.h> 41 #include <arm/cortex/mpcore_var.h> 42 #include <arm/cortex/gtmr_var.h> 43 44 #include <dev/fdt/fdtvar.h> 45 #include <arm/fdt/arm_fdtvar.h> 46 47 static int gtmr_fdt_match(device_t, cfdata_t, void *); 48 static void gtmr_fdt_attach(device_t, device_t, void *); 49 50 static void gtmr_fdt_cpu_hatch(void *, struct cpu_info *); 51 52 CFATTACH_DECL_NEW(gtmr_fdt, 0, gtmr_fdt_match, gtmr_fdt_attach, NULL, NULL); 53 54 /* The virtual timer list entry */ 55 #define GTMR_VTIMER 2 56 57 static const struct device_compatible_entry compat_data[] = { 58 { .compat = "arm,armv7-timer" }, 59 { .compat = "arm,armv8-timer" }, 60 DEVICE_COMPAT_EOL 61 }; 62 63 static int 64 gtmr_fdt_match(device_t parent, cfdata_t cf, void *aux) 65 { 66 struct fdt_attach_args * const faa = aux; 67 68 return of_compatible_match(faa->faa_phandle, compat_data); 69 } 70 71 static void 72 gtmr_fdt_attach(device_t parent, device_t self, void *aux) 73 { 74 aprint_naive("\n"); 75 aprint_normal(": Generic Timer\n"); 76 77 struct mpcore_attach_args mpcaa = { 78 .mpcaa_name = "armgtmr", 79 .mpcaa_irq = -1 /* setup handler locally */ 80 }; 81 struct fdt_attach_args * const faa = aux; 82 const int phandle = faa->faa_phandle; 83 84 char intrstr[128]; 85 if (!fdtbus_intr_str(phandle, GTMR_VTIMER, intrstr, sizeof(intrstr))) { 86 aprint_error(": failed to decode interrupt\n"); 87 return; 88 } 89 90 void *ih = fdtbus_intr_establish_xname(phandle, GTMR_VTIMER, IPL_CLOCK, 91 FDT_INTR_MPSAFE, gtmr_intr, NULL, device_xname(self)); 92 if (ih == NULL) { 93 aprint_error_dev(self, "couldn't install interrupt handler\n"); 94 return; 95 } 96 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 97 98 config_found(self, &mpcaa, NULL, CFARG_EOL); 99 100 arm_fdt_cpu_hatch_register(self, gtmr_fdt_cpu_hatch); 101 arm_fdt_timer_register(gtmr_cpu_initclocks); 102 } 103 104 static void 105 gtmr_fdt_cpu_hatch(void *priv, struct cpu_info *ci) 106 { 107 gtmr_init_cpu_clock(ci); 108 } 109