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sunxi_platform.c revision 1.16
      1 /* $NetBSD: sunxi_platform.c,v 1.16 2017/11/06 21:03:58 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 1.16 2017/11/06 21:03:58 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_1_CTRL	0x20
     68 #define	 SUN4I_TIMER_1_CTRL_CLK_SRC	__BITS(3,2)
     69 #define	 SUN4I_TIMER_1_CTRL_CLK_SRC_OSC24M	1
     70 #define	 SUN4I_TIMER_1_CTRL_RELOAD	__BIT(1)
     71 #define	 SUN4I_TIMER_1_CTRL_EN		__BIT(0)
     72 #define	SUN4I_TIMER_1_INTV_VALUE 0x24
     73 #define	SUN4I_TIMER_1_VAL	0x28
     74 
     75 #define	SUN4I_WDT_BASE		0x01c20c90
     76 #define	SUN4I_WDT_SIZE		0x10
     77 #define	SUN4I_WDT_CTRL		0x00
     78 #define	 SUN4I_WDT_CTRL_KEY	(0x333 << 1)
     79 #define	 SUN4I_WDT_CTRL_RESTART	__BIT(0)
     80 #define	SUN4I_WDT_MODE		0x04
     81 #define	 SUN4I_WDT_MODE_RST_EN	__BIT(1)
     82 #define	 SUN4I_WDT_MODE_EN	__BIT(0)
     83 
     84 #define	SUN6I_WDT_BASE		0x01c20ca0
     85 #define	SUN6I_WDT_SIZE		0x20
     86 #define	SUN6I_WDT_CFG		0x14
     87 #define	 SUN6I_WDT_CFG_SYS	__BIT(0)
     88 #define	SUN6I_WDT_MODE		0x18
     89 #define	 SUN6I_WDT_MODE_EN	__BIT(0)
     90 
     91 #define	SUN9I_WDT_BASE		0x06000ca0
     92 #define	SUN9I_WDT_SIZE		0x20
     93 #define	SUN9I_WDT_CFG		0x14
     94 #define	 SUN9I_WDT_CFG_SYS	__BIT(0)
     95 #define	SUN9I_WDT_MODE		0x18
     96 #define	 SUN9I_WDT_MODE_EN	__BIT(0)
     97 
     98 extern struct bus_space armv7_generic_bs_tag;
     99 extern struct bus_space armv7_generic_a4x_bs_tag;
    100 extern struct arm32_bus_dma_tag armv7_generic_dma_tag;
    101 
    102 static const struct pmap_devmap *
    103 sunxi_platform_devmap(void)
    104 {
    105 	static const struct pmap_devmap devmap[] = {
    106 		DEVMAP_ENTRY(SUNXI_CORE_VBASE,
    107 			     SUNXI_CORE_PBASE,
    108 			     SUNXI_CORE_SIZE),
    109 		DEVMAP_ENTRY_END
    110 	};
    111 
    112 	return devmap;
    113 }
    114 
    115 static void
    116 sunxi_platform_init_attach_args(struct fdt_attach_args *faa)
    117 {
    118 	faa->faa_bst = &armv7_generic_bs_tag;
    119 	faa->faa_a4x_bst = &armv7_generic_a4x_bs_tag;
    120 	faa->faa_dmat = &armv7_generic_dma_tag;
    121 }
    122 
    123 static void
    124 sunxi_platform_early_putchar(char c)
    125 {
    126 #ifdef CONSADDR
    127 #define CONSADDR_VA     ((CONSADDR - SUNXI_CORE_PBASE) + SUNXI_CORE_VBASE)
    128 	volatile uint32_t *uartaddr = (volatile uint32_t *)CONSADDR_VA;
    129 
    130 	while ((le32toh(uartaddr[com_lsr]) & LSR_TXRDY) == 0)
    131 		;
    132 
    133 	uartaddr[com_data] = htole32(c);
    134 #endif
    135 }
    136 
    137 static void
    138 sunxi_platform_device_register(device_t self, void *aux)
    139 {
    140 }
    141 
    142 static u_int
    143 sunxi_platform_uart_freq(void)
    144 {
    145 	return SUNXI_REF_FREQ;
    146 }
    147 
    148 static void
    149 sunxi_platform_bootstrap(void)
    150 {
    151 	if (match_bootconf_option(boot_args, "console", "fb")) {
    152 		void *fdt_data = __UNCONST(fdtbus_get_data());
    153 		const int chosen_off = fdt_path_offset(fdt_data, "/chosen");
    154 		const int framebuffer_off =
    155 		    fdt_path_offset(fdt_data, "/chosen/framebuffer");
    156 		if (chosen_off >= 0 && framebuffer_off >= 0)
    157 			fdt_setprop_string(fdt_data, chosen_off, "stdout-path",
    158 			    "/chosen/framebuffer");
    159 	}
    160 }
    161 
    162 static void
    163 sunxi_platform_psci_bootstrap(void)
    164 {
    165 	psci_fdt_bootstrap();
    166 	sunxi_platform_bootstrap();
    167 }
    168 
    169 static void
    170 sun4i_platform_reset(void)
    171 {
    172 	bus_space_tag_t bst = &armv7_generic_bs_tag;
    173 	bus_space_handle_t bsh;
    174 
    175 	bus_space_map(bst, SUN4I_WDT_BASE, SUN4I_WDT_SIZE, 0, &bsh);
    176 
    177 	bus_space_write_4(bst, bsh, SUN4I_WDT_CTRL,
    178 	    SUN4I_WDT_CTRL_KEY | SUN4I_WDT_CTRL_RESTART);
    179 	for (;;) {
    180 		bus_space_write_4(bst, bsh, SUN4I_WDT_MODE,
    181 		    SUN4I_WDT_MODE_EN | SUN4I_WDT_MODE_RST_EN);
    182 	}
    183 }
    184 
    185 static void
    186 sun4i_platform_delay(u_int n)
    187 {
    188 	static bus_space_tag_t bst = &armv7_generic_bs_tag;
    189 	static bus_space_handle_t bsh = 0;
    190 	const long incs_per_us = SUNXI_REF_FREQ / 1000000;
    191 	long ticks = n * incs_per_us;
    192 	uint32_t cur, prev;
    193 
    194 	if (bsh == 0) {
    195 		bus_space_map(bst, SUN4I_TIMER_BASE, SUN4I_TIMER_SIZE, 0, &bsh);
    196 
    197 		/* Enable Timer 1 */
    198 		bus_space_write_4(bst, bsh, SUN4I_TIMER_1_INTV_VALUE, ~0U);
    199 		bus_space_write_4(bst, bsh, SUN4I_TIMER_1_CTRL,
    200 		    SUN4I_TIMER_1_CTRL_EN |
    201 		    SUN4I_TIMER_1_CTRL_RELOAD |
    202 		    __SHIFTIN(SUN4I_TIMER_1_CTRL_CLK_SRC_OSC24M,
    203 			      SUN4I_TIMER_1_CTRL_CLK_SRC));
    204 	}
    205 
    206 	prev = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_1_VAL);
    207 	while (ticks > 0) {
    208 		cur = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_1_VAL);
    209 		if (cur > prev)
    210 			ticks -= (cur - prev);
    211 		else
    212 			ticks -= (~0U - cur + prev);
    213 		prev = cur;
    214 	}
    215 }
    216 
    217 static void
    218 sun6i_platform_reset(void)
    219 {
    220 	bus_space_tag_t bst = &armv7_generic_bs_tag;
    221 	bus_space_handle_t bsh;
    222 
    223 	bus_space_map(bst, SUN6I_WDT_BASE, SUN6I_WDT_SIZE, 0, &bsh);
    224 
    225 	bus_space_write_4(bst, bsh, SUN6I_WDT_CFG, SUN6I_WDT_CFG_SYS);
    226 	bus_space_write_4(bst, bsh, SUN6I_WDT_MODE, SUN6I_WDT_MODE_EN);
    227 }
    228 
    229 static void
    230 sun9i_platform_reset(void)
    231 {
    232 	bus_space_tag_t bst = &armv7_generic_bs_tag;
    233 	bus_space_handle_t bsh;
    234 
    235 	bus_space_map(bst, SUN9I_WDT_BASE, SUN9I_WDT_SIZE, 0, &bsh);
    236 
    237 	bus_space_write_4(bst, bsh, SUN9I_WDT_CFG, SUN9I_WDT_CFG_SYS);
    238 	bus_space_write_4(bst, bsh, SUN9I_WDT_MODE, SUN9I_WDT_MODE_EN);
    239 }
    240 
    241 static const struct arm_platform sun4i_platform = {
    242 	.devmap = sunxi_platform_devmap,
    243 	.bootstrap = sunxi_platform_bootstrap,
    244 	.init_attach_args = sunxi_platform_init_attach_args,
    245 	.early_putchar = sunxi_platform_early_putchar,
    246 	.device_register = sunxi_platform_device_register,
    247 	.reset = sun4i_platform_reset,
    248 	.delay = sun4i_platform_delay,
    249 	.uart_freq = sunxi_platform_uart_freq,
    250 };
    251 
    252 ARM_PLATFORM(sun4i_a10, "allwinner,sun4i-a10", &sun4i_platform);
    253 
    254 static const struct arm_platform sun5i_platform = {
    255 	.devmap = sunxi_platform_devmap,
    256 	.bootstrap = sunxi_platform_bootstrap,
    257 	.init_attach_args = sunxi_platform_init_attach_args,
    258 	.early_putchar = sunxi_platform_early_putchar,
    259 	.device_register = sunxi_platform_device_register,
    260 	.reset = sun4i_platform_reset,
    261 	.delay = sun4i_platform_delay,
    262 	.uart_freq = sunxi_platform_uart_freq,
    263 };
    264 
    265 ARM_PLATFORM(sun5i_a13, "allwinner,sun5i-a13", &sun5i_platform);
    266 ARM_PLATFORM(sun5i_gr8, "nextthing,gr8", &sun5i_platform);
    267 
    268 static const struct arm_platform sun6i_platform = {
    269 	.devmap = sunxi_platform_devmap,
    270 	.bootstrap = sunxi_platform_psci_bootstrap,
    271 	.init_attach_args = sunxi_platform_init_attach_args,
    272 	.early_putchar = sunxi_platform_early_putchar,
    273 	.device_register = sunxi_platform_device_register,
    274 	.reset = sun6i_platform_reset,
    275 	.delay = gtmr_delay,
    276 	.uart_freq = sunxi_platform_uart_freq,
    277 };
    278 
    279 ARM_PLATFORM(sun6i_a31, "allwinner,sun6i-a31", &sun6i_platform);
    280 
    281 static const struct arm_platform sun7i_platform = {
    282 	.devmap = sunxi_platform_devmap,
    283 	.bootstrap = sunxi_platform_psci_bootstrap,
    284 	.init_attach_args = sunxi_platform_init_attach_args,
    285 	.early_putchar = sunxi_platform_early_putchar,
    286 	.device_register = sunxi_platform_device_register,
    287 	.reset = sun4i_platform_reset,
    288 	.delay = sun4i_platform_delay,
    289 	.uart_freq = sunxi_platform_uart_freq,
    290 };
    291 
    292 ARM_PLATFORM(sun7i_a20, "allwinner,sun7i-a20", &sun7i_platform);
    293 
    294 static const struct arm_platform sun8i_platform = {
    295 	.devmap = sunxi_platform_devmap,
    296 	.bootstrap = sunxi_platform_psci_bootstrap,
    297 	.init_attach_args = sunxi_platform_init_attach_args,
    298 	.early_putchar = sunxi_platform_early_putchar,
    299 	.device_register = sunxi_platform_device_register,
    300 	.reset = sun6i_platform_reset,
    301 	.delay = gtmr_delay,
    302 	.uart_freq = sunxi_platform_uart_freq,
    303 };
    304 
    305 ARM_PLATFORM(sun8i_h2plus, "allwinner,sun8i-h2-plus", &sun8i_platform);
    306 ARM_PLATFORM(sun8i_h3, "allwinner,sun8i-h3", &sun8i_platform);
    307 ARM_PLATFORM(sun8i_a83t, "allwinner,sun8i-a83t", &sun8i_platform);
    308 
    309 static const struct arm_platform sun9i_platform = {
    310 	.devmap = sunxi_platform_devmap,
    311 	.bootstrap = sunxi_platform_bootstrap,
    312 	.init_attach_args = sunxi_platform_init_attach_args,
    313 	.early_putchar = sunxi_platform_early_putchar,
    314 	.device_register = sunxi_platform_device_register,
    315 	.reset = sun9i_platform_reset,
    316 	.delay = gtmr_delay,
    317 	.uart_freq = sunxi_platform_uart_freq,
    318 };
    319 
    320 ARM_PLATFORM(sun9i_a80, "allwinner,sun9i-a80", &sun9i_platform);
    321 
    322 static const struct arm_platform sun50i_platform = {
    323 	.devmap = sunxi_platform_devmap,
    324 	.bootstrap = sunxi_platform_bootstrap,
    325 	.init_attach_args = sunxi_platform_init_attach_args,
    326 	.early_putchar = sunxi_platform_early_putchar,
    327 	.device_register = sunxi_platform_device_register,
    328 	.reset = sun6i_platform_reset,
    329 	.delay = gtmr_delay,
    330 	.uart_freq = sunxi_platform_uart_freq,
    331 };
    332 
    333 ARM_PLATFORM(sun50i_a64, "allwinner,sun50i-a64", &sun50i_platform);
    334 ARM_PLATFORM(sun50i_h5, "allwinner,sun50i-h5", &sun50i_platform);
    335