1 /*- 2 * Copyright (c) 2013 Ian Lepore <ian@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_platform.h" 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/reboot.h> 36 37 #include <vm/vm.h> 38 39 #include <machine/bus.h> 40 #include <machine/devmap.h> 41 #include <machine/machdep.h> 42 43 #include <arm/freescale/imx/imx6_anatopreg.h> 44 #include <arm/freescale/imx/imx6_anatopvar.h> 45 #include <arm/freescale/imx/imx_machdep.h> 46 47 vm_offset_t 48 initarm_lastaddr(void) 49 { 50 51 return (arm_devmap_lastaddr()); 52 } 53 54 void 55 initarm_early_init(void) 56 { 57 58 } 59 60 void 61 initarm_gpio_init(void) 62 { 63 64 } 65 66 void 67 initarm_late_init(void) 68 { 69 70 } 71 72 /* 73 * Set up static device mappings. 74 * 75 * This attempts to cover the most-used devices with 1MB section mappings, which 76 * is good for performance (uses fewer TLB entries for device access). 77 * 78 * ARMMP covers the interrupt controller, MPCore timers, global timer, and the 79 * L2 cache controller. Most of the 1MB range is unused reserved space. 80 * 81 * AIPS1/AIPS2 cover most of the on-chip devices such as uart, spi, i2c, etc. 82 * 83 * Notably not mapped right now are HDMI, GPU, and other devices below ARMMP in 84 * the memory map. When we get support for graphics it might make sense to 85 * static map some of that area. Be careful with other things in that area such 86 * as OCRAM that probably shouldn't be mapped as PTE_DEVICE memory. 87 */ 88 int 89 initarm_devmap_init(void) 90 { 91 const uint32_t IMX6_ARMMP_PHYS = 0x00a00000; 92 const uint32_t IMX6_ARMMP_SIZE = 0x00100000; 93 const uint32_t IMX6_AIPS1_PHYS = 0x02000000; 94 const uint32_t IMX6_AIPS1_SIZE = 0x00100000; 95 const uint32_t IMX6_AIPS2_PHYS = 0x02100000; 96 const uint32_t IMX6_AIPS2_SIZE = 0x00100000; 97 98 arm_devmap_add_entry(IMX6_ARMMP_PHYS, IMX6_ARMMP_SIZE); 99 arm_devmap_add_entry(IMX6_AIPS1_PHYS, IMX6_AIPS1_SIZE); 100 arm_devmap_add_entry(IMX6_AIPS2_PHYS, IMX6_AIPS2_SIZE); 101 102 return (0); 103 } 104 105 void 106 cpu_reset(void) 107 { 108 const uint32_t IMX6_WDOG_CR_PHYS = 0x020bc000; 109 110 imx_wdog_cpu_reset(IMX6_WDOG_CR_PHYS); 111 } 112 113 /* 114 * Determine what flavor of imx6 we're running on. 115 * 116 * This code is based on the way u-boot does it. Information found on the web 117 * indicates that Freescale themselves were the original source of this logic, 118 * including the strange check for number of CPUs in the SCU configuration 119 * register, which is apparently needed on some revisions of the SOLO. 120 * 121 * According to the documentation, there is such a thing as an i.MX6 Dual 122 * (non-lite flavor). However, Freescale doesn't seem to have assigned it a 123 * number or provided any logic to handle it in their detection code. 124 * 125 * Note that the ANALOG_DIGPROG and SCU configuration registers are not 126 * documented in the chip reference manual. (SCU configuration is mentioned, 127 * but not mapped out in detail.) I think the bottom two bits of the scu config 128 * register may be ncpu-1. 129 * 130 * This hasn't been tested yet on a dual[-lite]. 131 * 132 * On a solo: 133 * digprog = 0x00610001 134 * hwsoc = 0x00000062 135 * scu config = 0x00000500 136 * On a quad: 137 * digprog = 0x00630002 138 * hwsoc = 0x00000063 139 * scu config = 0x00005503 140 */ 141 u_int imx_soc_type() 142 { 143 uint32_t digprog, hwsoc; 144 uint32_t *pcr; 145 const vm_offset_t SCU_CONFIG_PHYSADDR = 0x00a00004; 146 #define HWSOC_MX6SL 0x60 147 #define HWSOC_MX6DL 0x61 148 #define HWSOC_MX6SOLO 0x62 149 #define HWSOC_MX6Q 0x63 150 151 digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG_SL); 152 hwsoc = (digprog >> IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT) & 153 IMX6_ANALOG_DIGPROG_SOCTYPE_MASK; 154 155 if (hwsoc != HWSOC_MX6SL) { 156 digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG); 157 hwsoc = (digprog & IMX6_ANALOG_DIGPROG_SOCTYPE_MASK) >> 158 IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT; 159 /*printf("digprog = 0x%08x\n", digprog);*/ 160 if (hwsoc == HWSOC_MX6DL) { 161 pcr = arm_devmap_ptov(SCU_CONFIG_PHYSADDR, 4); 162 if (pcr != NULL) { 163 /*printf("scu config = 0x%08x\n", *pcr);*/ 164 if ((*pcr & 0x03) == 0) { 165 hwsoc = HWSOC_MX6SOLO; 166 } 167 } 168 } 169 } 170 /* printf("hwsoc 0x%08x\n", hwsoc); */ 171 172 switch (hwsoc) { 173 case HWSOC_MX6SL: 174 return (IMXSOC_6SL); 175 case HWSOC_MX6SOLO: 176 return (IMXSOC_6S); 177 case HWSOC_MX6DL: 178 return (IMXSOC_6DL); 179 case HWSOC_MX6Q : 180 return (IMXSOC_6Q); 181 default: 182 printf("imx_soc_type: Don't understand hwsoc 0x%02x, " 183 "digprog 0x%08x; assuming IMXSOC_6Q\n", hwsoc, digprog); 184 break; 185 } 186 187 return (IMXSOC_6Q); 188 } 189 190 /* 191 * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: 192 * option SOCDEV_PA=0x02000000 193 * option SOCDEV_VA=0x02000000 194 * option EARLY_PRINTF 195 * Resist the temptation to change the #if 0 to #ifdef EARLY_PRINTF here. It 196 * makes sense now, but if multiple SOCs do that it will make early_putc another 197 * duplicate symbol to be eliminated on the path to a generic kernel. 198 */ 199 #if 0 200 static void 201 imx6_early_putc(int c) 202 { 203 volatile uint32_t * UART_STAT_REG = (uint32_t *)0x02020098; 204 volatile uint32_t * UART_TX_REG = (uint32_t *)0x02020040; 205 const uint32_t UART_TXRDY = (1 << 3); 206 207 while ((*UART_STAT_REG & UART_TXRDY) == 0) 208 continue; 209 *UART_TX_REG = c; 210 } 211 early_putc_t *early_putc = imx6_early_putc; 212 #endif 213 214