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/*
* Copyright (C) 2016 Zodiac Inflight Innovation
* Author: Andrey Smirnov <andrew.smirnov@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <linux/sizes.h>
#include <mach/generic.h>
#include <asm/barebox-arm-head.h>
#include <asm/barebox-arm.h>
#include <mach/esdctl.h>
#include <mach/vf610-regs.h>
#include <mach/clock-vf610.h>
#include <mach/iomux-vf610.h>
#include <debug_ll.h>
static inline void setup_uart(void)
{
void __iomem *iomux = IOMEM(VF610_IOMUXC_BASE_ADDR);
vf610_ungate_all_peripherals();
vf610_setup_pad(iomux, VF610_PAD_PTB10__UART0_TX);
vf610_uart_setup_ll();
putc_ll('>');
}
enum zii_platform_vf610_type {
ZII_PLATFORM_VF610_DEV_REV_B = 0x01,
ZII_PLATFORM_VF610_SCU4_AIB = 0x02,
ZII_PLATFORM_VF610_SSMB_SPU3 = 0x03,
ZII_PLATFORM_VF610_CFU1 = 0x04,
ZII_PLATFORM_VF610_DEV_REV_C = 0x05,
ZII_PLATFORM_VF610_SPB4 = 0x06,
};
static unsigned int get_system_type(void)
{
#define GPIO_PDIR 0x10
u32 pdir;
void __iomem *gpio2 = IOMEM(VF610_GPIO2_BASE_ADDR);
void __iomem *iomux = IOMEM(VF610_IOMUXC_BASE_ADDR);
unsigned low, high;
/*
* System type is encoded as a 4-bit number specified by the
* following pins (pulled up or down with resistors on the
* board).
*/
vf610_setup_pad(iomux, VF610_PAD_PTD16__GPIO_78);
vf610_setup_pad(iomux, VF610_PAD_PTD17__GPIO_77);
vf610_setup_pad(iomux, VF610_PAD_PTD18__GPIO_76);
vf610_setup_pad(iomux, VF610_PAD_PTD19__GPIO_75);
pdir = readl(gpio2 + GPIO_PDIR);
low = 75 % 32;
high = 78 % 32;
pdir &= GENMASK(high, low);
pdir >>= low;
return pdir;
}
extern char __dtb_vf610_zii_dev_rev_b_start[];
extern char __dtb_vf610_zii_dev_rev_c_start[];
extern char __dtb_vf610_zii_cfu1_start[];
extern char __dtb_vf610_zii_ssmb_spu3_start[];
extern char __dtb_vf610_zii_scu4_aib_start[];
extern char __dtb_vf610_zii_spb4_start[];
ENTRY_FUNCTION(start_zii_vf610_dev, r0, r1, r2)
{
void *fdt;
const unsigned int system_type = get_system_type();
vf610_cpu_lowlevel_init();
if (IS_ENABLED(CONFIG_DEBUG_LL))
setup_uart();
switch (system_type) {
default:
if (IS_ENABLED(CONFIG_DEBUG_LL)) {
relocate_to_current_adr();
setup_c();
puts_ll("\n*********************************\n");
puts_ll("* Unknown system type: ");
puthex_ll(system_type);
puts_ll("\n* Assuming devboard revision B\n");
puts_ll("*********************************\n");
}
case ZII_PLATFORM_VF610_DEV_REV_B: /* FALLTHROUGH */
fdt = __dtb_vf610_zii_dev_rev_b_start;
break;
case ZII_PLATFORM_VF610_SCU4_AIB:
fdt = __dtb_vf610_zii_scu4_aib_start;
break;
case ZII_PLATFORM_VF610_DEV_REV_C:
fdt = __dtb_vf610_zii_dev_rev_c_start;
break;
case ZII_PLATFORM_VF610_CFU1:
fdt = __dtb_vf610_zii_cfu1_start;
break;
case ZII_PLATFORM_VF610_SSMB_SPU3:
fdt = __dtb_vf610_zii_ssmb_spu3_start;
break;
case ZII_PLATFORM_VF610_SPB4:
fdt = __dtb_vf610_zii_spb4_start;
break;
}
vf610_barebox_entry(fdt + get_runtime_offset());
}
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