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/*-
* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/reboot.h>
#include <vm/vm.h>
#include <machine/bus.h>
#include <machine/devmap.h>
#include <machine/machdep.h>
#include <arm/freescale/imx/imx6_anatopreg.h>
#include <arm/freescale/imx/imx6_anatopvar.h>
#include <arm/freescale/imx/imx_machdep.h>
vm_offset_t
initarm_lastaddr(void)
{
return (arm_devmap_lastaddr());
}
void
initarm_early_init(void)
{
/* XXX - Get rid of this stuff soon. */
boothowto |= RB_VERBOSE|RB_MULTIPLE;
bootverbose = 1;
}
void
initarm_gpio_init(void)
{
}
void
initarm_late_init(void)
{
}
/*
* Set up static device mappings.
*
* This attempts to cover the most-used devices with 1MB section mappings, which
* is good for performance (uses fewer TLB entries for device access).
*
* ARMMP covers the interrupt controller, MPCore timers, global timer, and the
* L2 cache controller. Most of the 1MB range is unused reserved space.
*
* AIPS1/AIPS2 cover most of the on-chip devices such as uart, spi, i2c, etc.
*
* Notably not mapped right now are HDMI, GPU, and other devices below ARMMP in
* the memory map. When we get support for graphics it might make sense to
* static map some of that area. Be careful with other things in that area such
* as OCRAM that probably shouldn't be mapped as PTE_DEVICE memory.
*/
int
initarm_devmap_init(void)
{
const uint32_t IMX6_ARMMP_PHYS = 0x00a00000;
const uint32_t IMX6_ARMMP_SIZE = 0x00100000;
const uint32_t IMX6_AIPS1_PHYS = 0x02000000;
const uint32_t IMX6_AIPS1_SIZE = 0x00100000;
const uint32_t IMX6_AIPS2_PHYS = 0x02100000;
const uint32_t IMX6_AIPS2_SIZE = 0x00100000;
arm_devmap_add_entry(IMX6_ARMMP_PHYS, IMX6_ARMMP_SIZE);
arm_devmap_add_entry(IMX6_AIPS1_PHYS, IMX6_AIPS1_SIZE);
arm_devmap_add_entry(IMX6_AIPS2_PHYS, IMX6_AIPS2_SIZE);
return (0);
}
void
cpu_reset(void)
{
const uint32_t IMX6_WDOG_CR_PHYS = 0x020bc000;
imx_wdog_cpu_reset(IMX6_WDOG_CR_PHYS);
}
/*
* Determine what flavor of imx6 we're running on.
*
* This code is based on the way u-boot does it. Information found on the web
* indicates that Freescale themselves were the original source of this logic,
* including the strange check for number of CPUs in the SCU configuration
* register, which is apparently needed on some revisions of the SOLO.
*
* According to the documentation, there is such a thing as an i.MX6 Dual
* (non-lite flavor). However, Freescale doesn't seem to have assigned it a
* number or provided any logic to handle it in their detection code.
*
* Note that the ANALOG_DIGPROG and SCU configuration registers are not
* documented in the chip reference manual. (SCU configuration is mentioned,
* but not mapped out in detail.) I think the bottom two bits of the scu config
* register may be ncpu-1.
*
* This hasn't been tested yet on a dual[-lite].
*
* On a solo:
* digprog = 0x00610001
* hwsoc = 0x00000062
* scu config = 0x00000500
* On a quad:
* digprog = 0x00630002
* hwsoc = 0x00000063
* scu config = 0x00005503
*/
u_int imx_soc_type()
{
uint32_t digprog, hwsoc;
uint32_t *pcr;
const vm_offset_t SCU_CONFIG_PHYSADDR = 0x00a00004;
#define HWSOC_MX6SL 0x60
#define HWSOC_MX6DL 0x61
#define HWSOC_MX6SOLO 0x62
#define HWSOC_MX6Q 0x63
digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG_SL);
hwsoc = (digprog >> IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT) &
IMX6_ANALOG_DIGPROG_SOCTYPE_MASK;
if (hwsoc != HWSOC_MX6SL) {
digprog = imx6_anatop_read_4(IMX6_ANALOG_DIGPROG);
hwsoc = (digprog & IMX6_ANALOG_DIGPROG_SOCTYPE_MASK) >>
IMX6_ANALOG_DIGPROG_SOCTYPE_SHIFT;
/*printf("digprog = 0x%08x\n", digprog);*/
if (hwsoc == HWSOC_MX6DL) {
pcr = arm_devmap_ptov(SCU_CONFIG_PHYSADDR, 4);
if (pcr != NULL) {
/*printf("scu config = 0x%08x\n", *pcr);*/
if ((*pcr & 0x03) == 0) {
hwsoc = HWSOC_MX6SOLO;
}
}
}
}
/* printf("hwsoc 0x%08x\n", hwsoc); */
switch (hwsoc) {
case HWSOC_MX6SL:
return (IMXSOC_6SL);
case HWSOC_MX6SOLO:
return (IMXSOC_6S);
case HWSOC_MX6DL:
return (IMXSOC_6DL);
case HWSOC_MX6Q :
return (IMXSOC_6Q);
default:
printf("imx_soc_type: Don't understand hwsoc 0x%02x, "
"digprog 0x%08x; assuming IMXSOC_6Q\n", hwsoc, digprog);
break;
}
return (IMXSOC_6Q);
}
/*
* Early putc routine for EARLY_PRINTF support. To use, add to kernel config:
* option SOCDEV_PA=0x02000000
* option SOCDEV_VA=0x02000000
* option EARLY_PRINTF
* Resist the temptation to change the #if 0 to #ifdef EARLY_PRINTF here. It
* makes sense now, but if multiple SOCs do that it will make early_putc another
* duplicate symbol to be eliminated on the path to a generic kernel.
*/
#if 0
static void
imx6_early_putc(int c)
{
volatile uint32_t * UART_STAT_REG = (uint32_t *)0x02020098;
volatile uint32_t * UART_TX_REG = (uint32_t *)0x02020040;
const uint32_t UART_TXRDY = (1 << 3);
while ((*UART_STAT_REG & UART_TXRDY) == 0)
continue;
*UART_TX_REG = c;
}
early_putc_t *early_putc = imx6_early_putc;
#endif
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