omap3_platform.c revision 1.7
1 /* $NetBSD: omap3_platform.c,v 1.7 2021/04/24 23:36:29 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 Jared McNeill <jmcneill (at) 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 "opt_soc.h" 30 #include "opt_console.h" 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: omap3_platform.c,v 1.7 2021/04/24 23:36:29 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/cpu.h> 38 #include <sys/device.h> 39 #include <sys/termios.h> 40 41 #include <dev/fdt/fdtvar.h> 42 #include <arm/fdt/arm_fdtvar.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bootconfig.h> 47 #include <arm/cpufunc.h> 48 49 #include <dev/ic/ns16550reg.h> 50 #include <dev/ic/comreg.h> 51 52 #include <evbarm/fdt/platform.h> 53 #include <evbarm/fdt/machdep.h> 54 55 #include <net/if_ether.h> 56 57 #include <libfdt.h> 58 59 #define OMAP3_L4_CORE_VBASE KERNEL_IO_VBASE 60 #define OMAP3_L4_CORE_PBASE 0x48000000 61 #define OMAP3_L4_CORE_SIZE 0x00100000 62 63 #define OMAP3_L4_WKUP_VBASE (OMAP3_L4_CORE_VBASE + OMAP3_L4_CORE_SIZE) 64 #define OMAP3_L4_WKUP_PBASE 0x48300000 65 #define OMAP3_L4_WKUP_SIZE 0x00100000 66 67 #define OMAP3_L4_PER_VBASE (OMAP3_L4_WKUP_VBASE + OMAP3_L4_WKUP_SIZE) 68 #define OMAP3_L4_PER_PBASE 0x49000000 69 #define OMAP3_L4_PER_SIZE 0x00100000 70 71 #define OMAP3_PRCM_BASE 0x48306000 72 #define OMAP3_PRCM_GR_BASE (OMAP3_PRCM_BASE + 0x1200) 73 #define PRM_RSTCTRL (OMAP3_PRCM_GR_BASE + 0x50) 74 #define PRM_RSTCTRL_RST_DPLL3 __BIT(2) 75 76 #define OMAP3_32KTIMER_BASE 0x48320000 77 #define REG_32KSYNCNT_CR (OMAP3_32KTIMER_BASE + 0x10) 78 79 static inline vaddr_t 80 omap3_phystovirt(paddr_t pa) 81 { 82 if (pa >= OMAP3_L4_CORE_PBASE && 83 pa < OMAP3_L4_CORE_PBASE + OMAP3_L4_CORE_SIZE) 84 return (pa - OMAP3_L4_CORE_PBASE) + OMAP3_L4_CORE_VBASE; 85 86 if (pa >= OMAP3_L4_WKUP_PBASE && 87 pa < OMAP3_L4_WKUP_PBASE + OMAP3_L4_WKUP_SIZE) 88 return (pa - OMAP3_L4_WKUP_PBASE) + OMAP3_L4_WKUP_VBASE; 89 90 if (pa >= OMAP3_L4_PER_PBASE && 91 pa < OMAP3_L4_PER_PBASE + OMAP3_L4_PER_SIZE) 92 return (pa - OMAP3_L4_PER_PBASE) + OMAP3_L4_PER_VBASE; 93 94 panic("%s: pa %#x not in devmap", __func__, (uint32_t)pa); 95 } 96 97 #define OMAP3_PHYSTOVIRT(pa) \ 98 (((pa) - OMAP3_L4_CORE_VBASE) + OMAP3_L4_CORE_PBASE) 99 100 extern struct arm32_bus_dma_tag arm_generic_dma_tag; 101 extern struct bus_space arm_generic_bs_tag; 102 103 static const struct pmap_devmap * 104 omap3_platform_devmap(void) 105 { 106 static const struct pmap_devmap devmap[] = { 107 DEVMAP_ENTRY(OMAP3_L4_CORE_VBASE, 108 OMAP3_L4_CORE_PBASE, 109 OMAP3_L4_CORE_SIZE), 110 DEVMAP_ENTRY(OMAP3_L4_WKUP_VBASE, 111 OMAP3_L4_WKUP_PBASE, 112 OMAP3_L4_WKUP_SIZE), 113 DEVMAP_ENTRY(OMAP3_L4_PER_VBASE, 114 OMAP3_L4_PER_PBASE, 115 OMAP3_L4_PER_SIZE), 116 DEVMAP_ENTRY_END 117 }; 118 119 return devmap; 120 } 121 122 static void 123 omap3_platform_init_attach_args(struct fdt_attach_args *faa) 124 { 125 faa->faa_bst = &arm_generic_bs_tag; 126 faa->faa_dmat = &arm_generic_dma_tag; 127 } 128 129 void omap3_platform_early_putchar(char); 130 131 void __noasan 132 omap3_platform_early_putchar(char c) 133 { 134 #ifdef CONSADDR 135 volatile uint32_t *uartaddr = cpu_earlydevice_va_p() ? 136 (volatile uint32_t *)omap3_phystovirt(CONSADDR): 137 (volatile uint32_t *)CONSADDR; 138 139 while ((le32toh(uartaddr[com_lsr]) & LSR_TXRDY) == 0) 140 ; 141 142 uartaddr[com_data] = htole32(c); 143 #endif 144 } 145 146 static void 147 omap3_platform_device_register(device_t self, void *aux) 148 { 149 } 150 151 static u_int 152 omap3_platform_uart_freq(void) 153 { 154 return 48000000U; 155 } 156 157 static void 158 omap3_platform_reset(void) 159 { 160 volatile uint32_t *rstctrl = 161 (volatile uint32_t *)omap3_phystovirt(PRM_RSTCTRL); 162 163 *rstctrl |= PRM_RSTCTRL_RST_DPLL3; 164 165 for (;;) 166 __asm("wfi"); 167 } 168 169 static void 170 omap3_platform_delay(u_int n) 171 { 172 volatile uint32_t *cr = 173 (volatile uint32_t *)omap3_phystovirt(REG_32KSYNCNT_CR); 174 uint32_t cur, prev; 175 176 long ticks = howmany(n * 32768, 1000000); 177 prev = *cr; 178 while (ticks > 0) { 179 cur = *cr; 180 if (cur >= prev) 181 ticks -= (cur - prev); 182 else 183 ticks -= (UINT32_MAX - cur + prev); 184 prev = cur; 185 } 186 } 187 188 static const struct arm_platform omap3_platform = { 189 .ap_devmap = omap3_platform_devmap, 190 .ap_bootstrap = arm_fdt_cpu_bootstrap, 191 .ap_init_attach_args = omap3_platform_init_attach_args, 192 .ap_device_register = omap3_platform_device_register, 193 .ap_reset = omap3_platform_reset, 194 .ap_delay = omap3_platform_delay, 195 .ap_uart_freq = omap3_platform_uart_freq, 196 }; 197 198 ARM_PLATFORM(omap3, "ti,omap3", &omap3_platform); 199
Indexes created Mon Oct 20 11:09:49 GMT 2025