sunxi_platform.c revision 1.12
1 /* $NetBSD: sunxi_platform.c,v 1.12 2017/10/21 02:21:30 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 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_multiprocessor.h" 31 #include "opt_fdt_arm.h" 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: sunxi_platform.c,v 1.12 2017/10/21 02:21:30 jmcneill Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/cpu.h> 39 #include <sys/device.h> 40 #include <sys/termios.h> 41 42 #include <dev/fdt/fdtvar.h> 43 #include <arm/fdt/arm_fdtvar.h> 44 45 #include <uvm/uvm_extern.h> 46 47 #include <machine/bootconfig.h> 48 #include <arm/cpufunc.h> 49 50 #include <arm/cortex/gtmr_var.h> 51 #include <arm/cortex/gic_reg.h> 52 53 #include <dev/ic/ns16550reg.h> 54 #include <dev/ic/comreg.h> 55 56 #include <arm/arm/psci.h> 57 #include <arm/fdt/psci_fdt.h> 58 59 #include <arm/sunxi/sunxi_platform.h> 60 61 #include <libfdt.h> 62 63 #define SUNXI_REF_FREQ 24000000 64 65 #define SUN4I_TIMER_BASE 0x01c20c00 66 #define SUN4I_TIMER_SIZE 0x90 67 #define SUN4I_TIMER_0_VAL 0x18 68 69 #define SUN4I_WDT_BASE 0x01c20c90 70 #define SUN4I_WDT_SIZE 0x10 71 #define SUN4I_WDT_CTRL 0x00 72 #define SUN4I_WDT_CTRL_KEY (0x333 << 1) 73 #define SUN4I_WDT_CTRL_RESTART __BIT(0) 74 #define SUN4I_WDT_MODE 0x04 75 #define SUN4I_WDT_MODE_RST_EN __BIT(1) 76 #define SUN4I_WDT_MODE_EN __BIT(0) 77 78 #define SUN6I_WDT_BASE 0x01c20ca0 79 #define SUN6I_WDT_SIZE 0x20 80 #define SUN6I_WDT_CFG 0x14 81 #define SUN6I_WDT_CFG_SYS __BIT(0) 82 #define SUN6I_WDT_MODE 0x18 83 #define SUN6I_WDT_MODE_EN __BIT(0) 84 85 #define SUN9I_WDT_BASE 0x06000ca0 86 #define SUN9I_WDT_SIZE 0x20 87 #define SUN9I_WDT_CFG 0x14 88 #define SUN9I_WDT_CFG_SYS __BIT(0) 89 #define SUN9I_WDT_MODE 0x18 90 #define SUN9I_WDT_MODE_EN __BIT(0) 91 92 93 #define DEVMAP_ALIGN(a) ((a) & ~L1_S_OFFSET) 94 #define DEVMAP_SIZE(s) roundup2((s), L1_S_SIZE) 95 #define DEVMAP_ENTRY(va, pa, sz) \ 96 { \ 97 .pd_va = DEVMAP_ALIGN(va), \ 98 .pd_pa = DEVMAP_ALIGN(pa), \ 99 .pd_size = DEVMAP_SIZE(sz), \ 100 .pd_prot = VM_PROT_READ|VM_PROT_WRITE, \ 101 .pd_cache = PTE_NOCACHE \ 102 } 103 #define DEVMAP_ENTRY_END { 0 } 104 105 extern struct bus_space armv7_generic_bs_tag; 106 extern struct bus_space armv7_generic_a4x_bs_tag; 107 extern struct arm32_bus_dma_tag armv7_generic_dma_tag; 108 109 static const struct pmap_devmap * 110 sunxi_platform_devmap(void) 111 { 112 static const struct pmap_devmap devmap[] = { 113 DEVMAP_ENTRY(SUNXI_CORE_VBASE, 114 SUNXI_CORE_PBASE, 115 SUNXI_CORE_SIZE), 116 DEVMAP_ENTRY_END 117 }; 118 119 return devmap; 120 } 121 122 static void 123 sunxi_platform_init_attach_args(struct fdt_attach_args *faa) 124 { 125 faa->faa_bst = &armv7_generic_bs_tag; 126 faa->faa_a4x_bst = &armv7_generic_a4x_bs_tag; 127 faa->faa_dmat = &armv7_generic_dma_tag; 128 } 129 130 static void 131 sunxi_platform_early_putchar(char c) 132 { 133 #ifdef CONSADDR 134 #define CONSADDR_VA ((CONSADDR - SUNXI_CORE_PBASE) + SUNXI_CORE_VBASE) 135 volatile uint32_t *uartaddr = (volatile uint32_t *)CONSADDR_VA; 136 137 while ((uartaddr[com_lsr] & LSR_TXRDY) == 0) 138 ; 139 140 uartaddr[com_data] = c; 141 #endif 142 } 143 144 static void 145 sunxi_platform_device_register(device_t self, void *aux) 146 { 147 } 148 149 static u_int 150 sunxi_platform_uart_freq(void) 151 { 152 return SUNXI_REF_FREQ; 153 } 154 155 static void 156 sunxi_platform_bootstrap(void) 157 { 158 if (match_bootconf_option(boot_args, "console", "fb")) { 159 void *fdt_data = __UNCONST(fdtbus_get_data()); 160 const int chosen_off = fdt_path_offset(fdt_data, "/chosen"); 161 const int framebuffer_off = 162 fdt_path_offset(fdt_data, "/chosen/framebuffer"); 163 if (chosen_off >= 0 && framebuffer_off >= 0) 164 fdt_setprop_string(fdt_data, chosen_off, "stdout-path", 165 "/chosen/framebuffer"); 166 } 167 } 168 169 static void 170 sunxi_platform_psci_bootstrap(void) 171 { 172 psci_fdt_bootstrap(); 173 sunxi_platform_bootstrap(); 174 } 175 176 static void 177 sun4i_platform_reset(void) 178 { 179 bus_space_tag_t bst = &armv7_generic_bs_tag; 180 bus_space_handle_t bsh; 181 182 bus_space_map(bst, SUN4I_WDT_BASE, SUN4I_WDT_SIZE, 0, &bsh); 183 184 bus_space_write_4(bst, bsh, SUN4I_WDT_CTRL, 185 SUN4I_WDT_CTRL_KEY | SUN4I_WDT_CTRL_RESTART); 186 for (;;) { 187 bus_space_write_4(bst, bsh, SUN4I_WDT_MODE, 188 SUN4I_WDT_MODE_EN | SUN4I_WDT_MODE_RST_EN); 189 } 190 } 191 192 static void 193 sun4i_platform_delay(u_int n) 194 { 195 static bus_space_tag_t bst = &armv7_generic_bs_tag; 196 static bus_space_handle_t bsh = 0; 197 const long incs_per_us = SUNXI_REF_FREQ / 1000000; 198 long ticks = n * incs_per_us; 199 uint32_t cur, prev; 200 201 if (bsh == 0) 202 bus_space_map(bst, SUN4I_TIMER_BASE, SUN4I_TIMER_SIZE, 0, &bsh); 203 204 prev = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_0_VAL); 205 while (ticks > 0) { 206 cur = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_0_VAL); 207 if (cur > prev) 208 ticks -= (cur - prev); 209 else 210 ticks -= (~0U - cur + prev); 211 prev = cur; 212 } 213 } 214 215 static void 216 sun6i_platform_reset(void) 217 { 218 bus_space_tag_t bst = &armv7_generic_bs_tag; 219 bus_space_handle_t bsh; 220 221 bus_space_map(bst, SUN6I_WDT_BASE, SUN6I_WDT_SIZE, 0, &bsh); 222 223 bus_space_write_4(bst, bsh, SUN6I_WDT_CFG, SUN6I_WDT_CFG_SYS); 224 bus_space_write_4(bst, bsh, SUN6I_WDT_MODE, SUN6I_WDT_MODE_EN); 225 } 226 227 static void 228 sun9i_platform_reset(void) 229 { 230 bus_space_tag_t bst = &armv7_generic_bs_tag; 231 bus_space_handle_t bsh; 232 233 bus_space_map(bst, SUN9I_WDT_BASE, SUN9I_WDT_SIZE, 0, &bsh); 234 235 bus_space_write_4(bst, bsh, SUN9I_WDT_CFG, SUN9I_WDT_CFG_SYS); 236 bus_space_write_4(bst, bsh, SUN9I_WDT_MODE, SUN9I_WDT_MODE_EN); 237 } 238 239 static const struct arm_platform sun4i_platform = { 240 .devmap = sunxi_platform_devmap, 241 .bootstrap = sunxi_platform_bootstrap, 242 .init_attach_args = sunxi_platform_init_attach_args, 243 .early_putchar = sunxi_platform_early_putchar, 244 .device_register = sunxi_platform_device_register, 245 .reset = sun4i_platform_reset, 246 .delay = sun4i_platform_delay, 247 .uart_freq = sunxi_platform_uart_freq, 248 }; 249 250 ARM_PLATFORM(sun4i_a10, "allwinner,sun4i-a10", &sun4i_platform); 251 252 static const struct arm_platform sun5i_platform = { 253 .devmap = sunxi_platform_devmap, 254 .bootstrap = sunxi_platform_bootstrap, 255 .init_attach_args = sunxi_platform_init_attach_args, 256 .early_putchar = sunxi_platform_early_putchar, 257 .device_register = sunxi_platform_device_register, 258 .reset = sun4i_platform_reset, 259 .delay = sun4i_platform_delay, 260 .uart_freq = sunxi_platform_uart_freq, 261 }; 262 263 ARM_PLATFORM(sun5i_a13, "allwinner,sun5i-a13", &sun5i_platform); 264 265 static const struct arm_platform sun6i_platform = { 266 .devmap = sunxi_platform_devmap, 267 .bootstrap = sunxi_platform_psci_bootstrap, 268 .init_attach_args = sunxi_platform_init_attach_args, 269 .early_putchar = sunxi_platform_early_putchar, 270 .device_register = sunxi_platform_device_register, 271 .reset = sun6i_platform_reset, 272 .delay = gtmr_delay, 273 .uart_freq = sunxi_platform_uart_freq, 274 }; 275 276 ARM_PLATFORM(sun6i_a31, "allwinner,sun6i-a31", &sun6i_platform); 277 278 static const struct arm_platform sun7i_platform = { 279 .devmap = sunxi_platform_devmap, 280 .bootstrap = sunxi_platform_psci_bootstrap, 281 .init_attach_args = sunxi_platform_init_attach_args, 282 .early_putchar = sunxi_platform_early_putchar, 283 .device_register = sunxi_platform_device_register, 284 .reset = sun4i_platform_reset, 285 .delay = sun4i_platform_delay, 286 .uart_freq = sunxi_platform_uart_freq, 287 }; 288 289 ARM_PLATFORM(sun7i_a20, "allwinner,sun7i-a20", &sun7i_platform); 290 291 static const struct arm_platform sun8i_platform = { 292 .devmap = sunxi_platform_devmap, 293 .bootstrap = sunxi_platform_psci_bootstrap, 294 .init_attach_args = sunxi_platform_init_attach_args, 295 .early_putchar = sunxi_platform_early_putchar, 296 .device_register = sunxi_platform_device_register, 297 .reset = sun6i_platform_reset, 298 .delay = gtmr_delay, 299 .uart_freq = sunxi_platform_uart_freq, 300 }; 301 302 ARM_PLATFORM(sun8i_h2plus, "allwinner,sun8i-h2-plus", &sun8i_platform); 303 ARM_PLATFORM(sun8i_h3, "allwinner,sun8i-h3", &sun8i_platform); 304 ARM_PLATFORM(sun8i_a83t, "allwinner,sun8i-a83t", &sun8i_platform); 305 306 static const struct arm_platform sun9i_platform = { 307 .devmap = sunxi_platform_devmap, 308 .bootstrap = sunxi_platform_bootstrap, 309 .init_attach_args = sunxi_platform_init_attach_args, 310 .early_putchar = sunxi_platform_early_putchar, 311 .device_register = sunxi_platform_device_register, 312 .reset = sun9i_platform_reset, 313 .delay = gtmr_delay, 314 .uart_freq = sunxi_platform_uart_freq, 315 }; 316 317 ARM_PLATFORM(sun9i_a80, "allwinner,sun9i-a80", &sun9i_platform); 318 319 static const struct arm_platform sun50i_platform = { 320 .devmap = sunxi_platform_devmap, 321 .bootstrap = sunxi_platform_bootstrap, 322 .init_attach_args = sunxi_platform_init_attach_args, 323 .early_putchar = sunxi_platform_early_putchar, 324 .device_register = sunxi_platform_device_register, 325 .reset = sun6i_platform_reset, 326 .delay = gtmr_delay, 327 .uart_freq = sunxi_platform_uart_freq, 328 }; 329 330 ARM_PLATFORM(sun50i_a64, "allwinner,sun50i-a64", &sun50i_platform); 331 ARM_PLATFORM(sun50i_h5, "allwinner,sun50i-h5", &sun50i_platform); 332
Indexes created Tue Sep 23 02:09:52 GMT 2025