1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org> 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, 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 "opt_platform.h" 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/reboot.h> 37 #include <sys/devmap.h> 38 #include <sys/physmem.h> 39 40 #include <vm/vm.h> 41 42 #include <machine/bus.h> 43 #include <machine/intr.h> 44 #include <machine/machdep.h> 45 #include <machine/platformvar.h> 46 47 #include <dev/fdt/fdt_common.h> 48 #include <dev/ofw/openfirm.h> 49 50 #include <arm/qualcomm/ipq4018_machdep.h> 51 #include <arm/qualcomm/ipq4018_reg.h> 52 53 #include "platform_if.h" 54 55 static int 56 ipq4018_attach(platform_t plat) 57 { 58 return (0); 59 } 60 61 static void 62 ipq4018_late_init(platform_t plat) 63 { 64 /* 65 * XXX FIXME This is needed because we're not parsing 66 * the fdt reserved memory regions in a consistent way 67 * between arm/arm64. Once the reserved region parsing 68 * is fixed up this will become unneccessary. 69 * 70 * These cover the SRAM/TZ regions that are not fully 71 * accessible from the OS. They're in the ipq4018.dtsi 72 * tree. 73 * 74 * Without these, the system fails to boot because we 75 * aren't parsing the regions correctly. 76 * 77 * These will be unnecessary once the parser and setup 78 * code is fixed. 79 */ 80 physmem_exclude_region(IPQ4018_MEM_SMEM_START, 81 IPQ4018_MEM_SMEM_SIZE, 82 EXFLAG_NODUMP | EXFLAG_NOALLOC); 83 physmem_exclude_region(IPQ4018_MEM_TZ_START, 84 IPQ4018_MEM_TZ_SIZE, 85 EXFLAG_NODUMP | EXFLAG_NOALLOC); 86 } 87 88 static int 89 ipq4018_devmap_init(platform_t plat) 90 { 91 /* 92 * This covers the boot UART. Without it we can't boot successfully: 93 * there's a mutex uninit panic in subr_vmem.c that occurs when doing 94 * a call to pmap_mapdev() when the bus space code is doing its thing. 95 */ 96 devmap_add_entry(IPQ4018_MEM_UART1_START, IPQ4018_MEM_UART1_SIZE); 97 return (0); 98 } 99 100 static void 101 ipq4018_cpu_reset(platform_t plat) 102 { 103 } 104 105 /* 106 * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: 107 * option SOCDEV_PA=0x07800000 108 * option SOCDEV_VA=0x07800000 109 * option EARLY_PRINTF 110 * Resist the temptation to change the #if 0 to #ifdef EARLY_PRINTF here. It 111 * makes sense now, but if multiple SOCs do that it will make early_putc another 112 * duplicate symbol to be eliminated on the path to a generic kernel. 113 */ 114 #if 0 115 void 116 qca_msm_early_putc(int c) 117 { 118 static int is_init = 0; 119 120 int limit; 121 /* 122 * This must match what's put into SOCDEV_VA. You have to change them 123 * both together. 124 * 125 * XXX TODO I should really go and just make UART_BASE here depend upon 126 * SOCDEV_VA so they move together. 127 */ 128 #define UART_BASE IPQ4018_MEM_UART1_START 129 volatile uint32_t * UART_DM_TF0 = (uint32_t *)(UART_BASE + 0x70); 130 volatile uint32_t * UART_DM_SR = (uint32_t *)(UART_BASE + 0x08); 131 #define UART_DM_SR_TXEMT (1 << 3) 132 #define UART_DM_SR_TXRDY (1 << 2) 133 volatile uint32_t * UART_DM_ISR = (uint32_t *)(UART_BASE + 0x14); 134 volatile uint32_t * UART_DM_CR = (uint32_t *)(UART_BASE + 0x10); 135 #define UART_DM_TX_READY (1 << 7) 136 #define UART_DM_CLEAR_TX_READY 0x300 137 volatile uint32_t * UART_DM_NO_CHARS_FOR_TX = (uint32_t *)(UART_BASE + 0x40); 138 volatile uint32_t * UART_DM_TFWR = (uint32_t *)(UART_BASE + 0x1c); 139 #define UART_DM_TFW_VALUE 0 140 volatile uint32_t * UART_DM_IPR = (uint32_t *)(UART_BASE + 0x18); 141 #define UART_DM_STALE_TIMEOUT_LSB 0xf 142 143 if (is_init == 0) { 144 is_init = 1; 145 *UART_DM_TFWR = UART_DM_TFW_VALUE; 146 wmb(); 147 *UART_DM_IPR = UART_DM_STALE_TIMEOUT_LSB; 148 wmb(); 149 } 150 151 /* Wait until TXFIFO is empty via ISR */ 152 limit = 100000; 153 if ((*UART_DM_SR & UART_DM_SR_TXEMT) == 0) { 154 while (((*UART_DM_ISR & UART_DM_TX_READY) == 0) && --limit) { 155 /* Note - can't use DELAY here yet, too early */ 156 rmb(); 157 } 158 *UART_DM_CR = UART_DM_CLEAR_TX_READY; 159 wmb(); 160 } 161 162 /* FIFO is ready. Say we're going to write one byte */ 163 *UART_DM_NO_CHARS_FOR_TX = 1; 164 wmb(); 165 166 limit = 100000; 167 while (((*UART_DM_SR & UART_DM_SR_TXRDY) == 0) && --limit) { 168 /* Note - can't use DELAY here yet, too early */ 169 rmb(); 170 } 171 172 /* Put character in first fifo slot */ 173 *UART_DM_TF0 = c; 174 wmb(); 175 } 176 early_putc_t *early_putc = qca_msm_early_putc; 177 #endif 178 179 static platform_method_t ipq4018_methods[] = { 180 PLATFORMMETHOD(platform_attach, ipq4018_attach), 181 PLATFORMMETHOD(platform_devmap_init, ipq4018_devmap_init), 182 PLATFORMMETHOD(platform_late_init, ipq4018_late_init), 183 PLATFORMMETHOD(platform_cpu_reset, ipq4018_cpu_reset), 184 185 #ifdef SMP 186 PLATFORMMETHOD(platform_mp_start_ap, ipq4018_mp_start_ap), 187 PLATFORMMETHOD(platform_mp_setmaxid, ipq4018_mp_setmaxid), 188 #endif 189 190 PLATFORMMETHOD_END, 191 }; 192 193 FDT_PLATFORM_DEF2(ipq4018, ipq4018_ac58u, "ASUS RT-AC58U", 0, 194 "asus,rt-ac58u", 80); 195