/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2021 Adrian Chadd * * 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 AUTHOR 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. */ #include "opt_platform.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "platform_if.h" static int ipq4018_attach(platform_t plat) { return (0); } static void ipq4018_late_init(platform_t plat) { /* * XXX FIXME This is needed because we're not parsing * the fdt reserved memory regions in a consistent way * between arm/arm64. Once the reserved region parsing * is fixed up this will become unneccessary. * * These cover the SRAM/TZ regions that are not fully * accessible from the OS. They're in the ipq4018.dtsi * tree. * * Without these, the system fails to boot because we * aren't parsing the regions correctly. * * These will be unnecessary once the parser and setup * code is fixed. */ physmem_exclude_region(IPQ4018_MEM_SMEM_START, IPQ4018_MEM_SMEM_SIZE, EXFLAG_NODUMP | EXFLAG_NOALLOC); physmem_exclude_region(IPQ4018_MEM_TZ_START, IPQ4018_MEM_TZ_SIZE, EXFLAG_NODUMP | EXFLAG_NOALLOC); } static int ipq4018_devmap_init(platform_t plat) { /* * This covers the boot UART. Without it we can't boot successfully: * there's a mutex uninit panic in subr_vmem.c that occurs when doing * a call to pmap_mapdev() when the bus space code is doing its thing. */ devmap_add_entry(IPQ4018_MEM_UART1_START, IPQ4018_MEM_UART1_SIZE); /* * This covers a bunch of the reset block, which includes the PS-HOLD * register for dropping power. */ devmap_add_entry(IPQ4018_MEM_PSHOLD_START, IPQ4018_MEM_PSHOLD_SIZE); return (0); } /* * This toggles the PS-HOLD register which on most IPQ devices will toggle * the power control block and reset the SoC. * * However, there are apparently some units out there where this is not * appropriate and instead the watchdog needs to be used. * * For now since there's only going to be one or two initial supported boards * this will be fine. But if this doesn't reboot cleanly, now you know. */ static void ipq4018_cpu_reset_pshold(void) { bus_space_handle_t pshold; printf("%s: called\n", __func__); bus_space_map(fdtbus_bs_tag, IPQ4018_MEM_PSHOLD_START, IPQ4018_MEM_PSHOLD_SIZE, 0, &pshold); bus_space_write_4(fdtbus_bs_tag, pshold, 0, 0); bus_space_barrier(fdtbus_bs_tag, pshold, 0, 0x4, BUS_SPACE_BARRIER_WRITE); } static void ipq4018_cpu_reset(platform_t plat) { spinlock_enter(); dsb(); ipq4018_cpu_reset_pshold(); /* Spin */ printf("%s: spinning\n", __func__); while(1) ; } /* * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: * option SOCDEV_PA=0x07800000 * option SOCDEV_VA=0x07800000 * option EARLY_PRINTF * Resist the temptation to change the #if 0 to #ifdef EARLY_PRINTF here. It * makes sense now, but if multiple SOCs do that it will make early_putc another * duplicate symbol to be eliminated on the path to a generic kernel. */ #if 0 void qca_msm_early_putc(int c) { static int is_init = 0; int limit; /* * This must match what's put into SOCDEV_VA. You have to change them * both together. * * XXX TODO I should really go and just make UART_BASE here depend upon * SOCDEV_VA so they move together. */ #define UART_BASE IPQ4018_MEM_UART1_START volatile uint32_t * UART_DM_TF0 = (uint32_t *)(UART_BASE + 0x70); volatile uint32_t * UART_DM_SR = (uint32_t *)(UART_BASE + 0x08); #define UART_DM_SR_TXEMT (1 << 3) #define UART_DM_SR_TXRDY (1 << 2) volatile uint32_t * UART_DM_ISR = (uint32_t *)(UART_BASE + 0x14); volatile uint32_t * UART_DM_CR = (uint32_t *)(UART_BASE + 0x10); #define UART_DM_TX_READY (1 << 7) #define UART_DM_CLEAR_TX_READY 0x300 volatile uint32_t * UART_DM_NO_CHARS_FOR_TX = (uint32_t *)(UART_BASE + 0x40); volatile uint32_t * UART_DM_TFWR = (uint32_t *)(UART_BASE + 0x1c); #define UART_DM_TFW_VALUE 0 volatile uint32_t * UART_DM_IPR = (uint32_t *)(UART_BASE + 0x18); #define UART_DM_STALE_TIMEOUT_LSB 0xf if (is_init == 0) { is_init = 1; *UART_DM_TFWR = UART_DM_TFW_VALUE; wmb(); *UART_DM_IPR = UART_DM_STALE_TIMEOUT_LSB; wmb(); } /* Wait until TXFIFO is empty via ISR */ limit = 100000; if ((*UART_DM_SR & UART_DM_SR_TXEMT) == 0) { while (((*UART_DM_ISR & UART_DM_TX_READY) == 0) && --limit) { /* Note - can't use DELAY here yet, too early */ rmb(); } *UART_DM_CR = UART_DM_CLEAR_TX_READY; wmb(); } /* FIFO is ready. Say we're going to write one byte */ *UART_DM_NO_CHARS_FOR_TX = 1; wmb(); limit = 100000; while (((*UART_DM_SR & UART_DM_SR_TXRDY) == 0) && --limit) { /* Note - can't use DELAY here yet, too early */ rmb(); } /* Put character in first fifo slot */ *UART_DM_TF0 = c; wmb(); } early_putc_t *early_putc = qca_msm_early_putc; #endif static platform_method_t ipq4018_methods[] = { PLATFORMMETHOD(platform_attach, ipq4018_attach), PLATFORMMETHOD(platform_devmap_init, ipq4018_devmap_init), PLATFORMMETHOD(platform_late_init, ipq4018_late_init), PLATFORMMETHOD(platform_cpu_reset, ipq4018_cpu_reset), #ifdef SMP PLATFORMMETHOD(platform_mp_start_ap, ipq4018_mp_start_ap), PLATFORMMETHOD(platform_mp_setmaxid, ipq4018_mp_setmaxid), #endif PLATFORMMETHOD_END, }; FDT_PLATFORM_DEF2(ipq4018, ipq4018_ac58u, "ASUS RT-AC58U", 0, "asus,rt-ac58u", 80);