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 /* XXX - Get rid of this stuff soon. */ 59 boothowto |= RB_VERBOSE|RB_MULTIPLE; 60 bootverbose = 1; 61 } 62 63 void 64 initarm_gpio_init(void) 65 { 66 67 } 68 69 void 70 initarm_late_init(void) 71 { 72 73 } 74 75 /* 76 * Set up static device mappings. 77 * 78 * This attempts to cover the most-used devices with 1MB section mappings, which 79 * is good for performance (uses fewer TLB entries for device access). 80 * 81 * ARMMP covers the interrupt controller, MPCore timers, global timer, and the 82 * L2 cache controller. Most of the 1MB range is unused reserved space. 83 * 84 * AIPS1/AIPS2 cover most of the on-chip devices such as uart, spi, i2c, etc. 85 * 86 * Notably not mapped right now are HDMI, GPU, and other devices below ARMMP in 87 * the memory map. When we get support for graphics it might make sense to 88 * static map some of that area. Be careful with other things in that area such 89 * as OCRAM that probably shouldn't be mapped as PTE_DEVICE memory. 90 */ 91 int 92 initarm_devmap_init(void) 93 { 94 const uint32_t IMX6_ARMMP_PHYS = 0x00a00000; 95 const uint32_t IMX6_ARMMP_SIZE = 0x00100000; 96 const uint32_t IMX6_AIPS1_PHYS = 0x02000000; 97 const uint32_t IMX6_AIPS1_SIZE = 0x00100000; 98 const uint32_t IMX6_AIPS2_PHYS = 0x02100000; 99 const uint32_t IMX6_AIPS2_SIZE = 0x00100000; 100 101 arm_devmap_add_entry(IMX6_ARMMP_PHYS, IMX6_ARMMP_SIZE); 102 arm_devmap_add_entry(IMX6_AIPS1_PHYS, IMX6_AIPS1_SIZE); 103 arm_devmap_add_entry(IMX6_AIPS2_PHYS, IMX6_AIPS2_SIZE); 104 105 return (0); 106 } 107 108 void 109 cpu_reset(void) 110 { 111 const uint32_t IMX6_WDOG_CR_PHYS = 0x020bc000; 112 113 imx_wdog_cpu_reset(IMX6_WDOG_CR_PHYS); 114 } 115 116 /* 117 * Determine what flavor of imx6 we're running on. 118 * 119 * This code is based on the way u-boot does it. Information found on the web 120 * indicates that Freescale themselves were the original source of this logic, 121 * including the strange check for number of CPUs in the SCU configuration 122 * register, which is apparently needed on some revisions of the SOLO. 123 * 124 * According to the documentation, there is such a thing as an i.MX6 Dual 125 * (non-lite flavor). However, Freescale doesn't seem to have assigned it a 126 * number or provided any logic to handle it in their detection code. 127 * 128 * Note that the ANALOG_DIGPROG and SCU configuration registers are not 129 * documented in the chip reference manual. (SCU configuration is mentioned, 130 * but not mapped out in detail.) I think the bottom two bits of the scu config 131 * register may be ncpu-1. 132 * 133 * This hasn't been tested yet on a dual[-lite]. 134 * 135 * On a solo: 136 * digprog = 0x00610001 137 * hwsoc = 0x00000062 138 * scu config = 0x00000500 139 * On a quad: 140 * digprog = 0x00630002 141 * hwsoc = 0x00000063 142 * scu config = 0x00005503 143 */ 144 u_int imx_soc_type() 145 { 146 uint32_t digprog, hwsoc; 147 uint32_t *pcr; 148 const vm_offset_t SCU_CONFIG_PHYSADDR = 0x00a00004; 149 #define HWSOC_MX6SL 0x60 150 #define HWSOC_MX6DL 0x61 151 #define HWSOC_MX6SOLO 0x62 152 #define HWSOC_MX6Q 0x63 153 154 digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG_SL); 155 hwsoc = (digprog >> IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT) & 156 IMX6_ANALOG_DIGPROG_SOCTYPE_MASK; 157 158 if (hwsoc != HWSOC_MX6SL) { 159 digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG); 160 hwsoc = (digprog & IMX6_ANALOG_DIGPROG_SOCTYPE_MASK) >> 161 IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT; 162 /*printf("digprog = 0x%08x\n", digprog);*/ 163 if (hwsoc == HWSOC_MX6DL) { 164 pcr = arm_devmap_ptov(SCU_CONFIG_PHYSADDR, 4); 165 if (pcr != NULL) { 166 /*printf("scu config = 0x%08x\n", *pcr);*/ 167 if ((*pcr & 0x03) == 0) { 168 hwsoc = HWSOC_MX6SOLO; 169 } 170 } 171 } 172 } 173 /* printf("hwsoc 0x%08x\n", hwsoc); */ 174 175 switch (hwsoc) { 176 case HWSOC_MX6SL: 177 return (IMXSOC_6SL); 178 case HWSOC_MX6SOLO: 179 return (IMXSOC_6S); 180 case HWSOC_MX6DL: 181 return (IMXSOC_6DL); 182 case HWSOC_MX6Q : 183 return (IMXSOC_6Q); 184 default: 185 printf("imx_soc_type: Don't understand hwsoc 0x%02x, " 186 "digprog 0x%08x; assuming IMXSOC_6Q\n", hwsoc, digprog); 187 break; 188 } 189 190 return (IMXSOC_6Q); 191 } 192 193