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 #include <machine/platform.h> 43 44 #include <arm/arm/mpcore_timervar.h> 45 #include <arm/freescale/imx/imx6_anatopreg.h> 46 #include <arm/freescale/imx/imx6_anatopvar.h> 47 #include <arm/freescale/imx/imx_machdep.h> 48 49 vm_offset_t 50 platform_lastaddr(void) 51 { 52 53 return (arm_devmap_lastaddr()); 54 } 55 56 void 57 platform_probe_and_attach(void) 58 { 59 60 /* Inform the MPCore timer driver that its clock is variable. */ 61 arm_tmr_change_frequency(ARM_TMR_FREQUENCY_VARIES); 62 } 63 64 void 65 platform_gpio_init(void) 66 { 67 68 } 69 70 void 71 platform_late_init(void) 72 { 73 74 } 75 76 /* 77 * Set up static device mappings. 78 * 79 * This attempts to cover the most-used devices with 1MB section mappings, which 80 * is good for performance (uses fewer TLB entries for device access). 81 * 82 * ARMMP covers the interrupt controller, MPCore timers, global timer, and the 83 * L2 cache controller. Most of the 1MB range is unused reserved space. 84 * 85 * AIPS1/AIPS2 cover most of the on-chip devices such as uart, spi, i2c, etc. 86 * 87 * Notably not mapped right now are HDMI, GPU, and other devices below ARMMP in 88 * the memory map. When we get support for graphics it might make sense to 89 * static map some of that area. Be careful with other things in that area such 90 * as OCRAM that probably shouldn't be mapped as PTE_DEVICE memory. 91 */ 92 int 93 platform_devmap_init(void) 94 { 95 const uint32_t IMX6_ARMMP_PHYS = 0x00a00000; 96 const uint32_t IMX6_ARMMP_SIZE = 0x00100000; 97 const uint32_t IMX6_AIPS1_PHYS = 0x02000000; 98 const uint32_t IMX6_AIPS1_SIZE = 0x00100000; 99 const uint32_t IMX6_AIPS2_PHYS = 0x02100000; 100 const uint32_t IMX6_AIPS2_SIZE = 0x00100000; 101 102 arm_devmap_add_entry(IMX6_ARMMP_PHYS, IMX6_ARMMP_SIZE); 103 arm_devmap_add_entry(IMX6_AIPS1_PHYS, IMX6_AIPS1_SIZE); 104 arm_devmap_add_entry(IMX6_AIPS2_PHYS, IMX6_AIPS2_SIZE); 105 106 return (0); 107 } 108 109 void 110 cpu_reset(void) 111 { 112 const uint32_t IMX6_WDOG_CR_PHYS = 0x020bc000; 113 114 imx_wdog_cpu_reset(IMX6_WDOG_CR_PHYS); 115 } 116 117 /* 118 * Determine what flavor of imx6 we're running on. 119 * 120 * This code is based on the way u-boot does it. Information found on the web 121 * indicates that Freescale themselves were the original source of this logic, 122 * including the strange check for number of CPUs in the SCU configuration 123 * register, which is apparently needed on some revisions of the SOLO. 124 * 125 * According to the documentation, there is such a thing as an i.MX6 Dual 126 * (non-lite flavor). However, Freescale doesn't seem to have assigned it a 127 * number or provided any logic to handle it in their detection code. 128 * 129 * Note that the ANALOG_DIGPROG and SCU configuration registers are not 130 * documented in the chip reference manual. (SCU configuration is mentioned, 131 * but not mapped out in detail.) I think the bottom two bits of the scu config 132 * register may be ncpu-1. 133 * 134 * This hasn't been tested yet on a dual[-lite]. 135 * 136 * On a solo: 137 * digprog = 0x00610001 138 * hwsoc = 0x00000062 139 * scu config = 0x00000500 140 * On a quad: 141 * digprog = 0x00630002 142 * hwsoc = 0x00000063 143 * scu config = 0x00005503 144 */ 145 u_int imx_soc_type() 146 { 147 uint32_t digprog, hwsoc; 148 uint32_t *pcr; 149 const vm_offset_t SCU_CONFIG_PHYSADDR = 0x00a00004; 150 #define HWSOC_MX6SL 0x60 151 #define HWSOC_MX6DL 0x61 152 #define HWSOC_MX6SOLO 0x62 153 #define HWSOC_MX6Q 0x63 154 155 digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG_SL); 156 hwsoc = (digprog >> IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT) & 157 IMX6_ANALOG_DIGPROG_SOCTYPE_MASK; 158 159 if (hwsoc != HWSOC_MX6SL) { 160 digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG); 161 hwsoc = (digprog & IMX6_ANALOG_DIGPROG_SOCTYPE_MASK) >> 162 IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT; 163 /*printf("digprog = 0x%08x\n", digprog);*/ 164 if (hwsoc == HWSOC_MX6DL) { 165 pcr = arm_devmap_ptov(SCU_CONFIG_PHYSADDR, 4); 166 if (pcr != NULL) { 167 /*printf("scu config = 0x%08x\n", *pcr);*/ 168 if ((*pcr & 0x03) == 0) { 169 hwsoc = HWSOC_MX6SOLO; 170 } 171 } 172 } 173 } 174 /* printf("hwsoc 0x%08x\n", hwsoc); */ 175 176 switch (hwsoc) { 177 case HWSOC_MX6SL: 178 return (IMXSOC_6SL); 179 case HWSOC_MX6SOLO: 180 return (IMXSOC_6S); 181 case HWSOC_MX6DL: 182 return (IMXSOC_6DL); 183 case HWSOC_MX6Q : 184 return (IMXSOC_6Q); 185 default: 186 printf("imx_soc_type: Don't understand hwsoc 0x%02x, " 187 "digprog 0x%08x; assuming IMXSOC_6Q\n", hwsoc, digprog); 188 break; 189 } 190 191 return (IMXSOC_6Q); 192 } 193 194 /* 195 * Early putc routine for EARLY_PRINTF support. To use, add to kernel config: 196 * option SOCDEV_PA=0x02000000 197 * option SOCDEV_VA=0x02000000 198 * option EARLY_PRINTF 199 * Resist the temptation to change the #if 0 to #ifdef EARLY_PRINTF here. It 200 * makes sense now, but if multiple SOCs do that it will make early_putc another 201 * duplicate symbol to be eliminated on the path to a generic kernel. 202 */ 203 #if 0 204 static void 205 imx6_early_putc(int c) 206 { 207 volatile uint32_t * UART_STAT_REG = (uint32_t *)0x02020098; 208 volatile uint32_t * UART_TX_REG = (uint32_t *)0x02020040; 209 const uint32_t UART_TXRDY = (1 << 3); 210 211 while ((*UART_STAT_REG & UART_TXRDY) == 0) 212 continue; 213 *UART_TX_REG = c; 214 } 215 early_putc_t *early_putc = imx6_early_putc; 216 #endif 217 218