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/*
* Copyright (c) 2015, Linaro Limited
* 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <console.h>
#include <drivers/pl011.h>
#ifdef CFG_SPI
#include <drivers/pl022_spi.h>
#include <drivers/pl061_gpio.h>
#endif
#include <hikey_peripherals.h>
#include <initcall.h>
#include <io.h>
#include <kernel/generic_boot.h>
#include <kernel/panic.h>
#include <kernel/pm_stubs.h>
#include <mm/tee_pager.h>
#include <mm/core_memprot.h>
#include <platform_config.h>
#include <stdint.h>
#include <tee/entry_std.h>
#include <tee/entry_fast.h>
static void main_fiq(void);
static const struct thread_handlers handlers = {
.std_smc = tee_entry_std,
.fast_smc = tee_entry_fast,
.nintr = main_fiq,
.cpu_on = cpu_on_handler,
.cpu_off = pm_do_nothing,
.cpu_suspend = pm_do_nothing,
.cpu_resume = pm_do_nothing,
.system_off = pm_do_nothing,
.system_reset = pm_do_nothing,
};
static struct pl011_data console_data __early_bss;
register_phys_mem(MEM_AREA_IO_NSEC, CONSOLE_UART_BASE, PL011_REG_SIZE);
register_phys_mem(MEM_AREA_IO_NSEC, PMUSSI_BASE, PMUSSI_REG_SIZE);
#ifdef CFG_SPI
register_phys_mem(MEM_AREA_IO_NSEC, PERI_BASE, PERI_BASE_REG_SIZE);
register_phys_mem(MEM_AREA_IO_NSEC, PMX0_BASE, PMX0_REG_SIZE);
register_phys_mem(MEM_AREA_IO_NSEC, PMX1_BASE, PMX1_REG_SIZE);
register_phys_mem(MEM_AREA_IO_NSEC, GPIO6_BASE, PL061_REG_SIZE);
register_phys_mem(MEM_AREA_IO_NSEC, SPI_BASE, PL022_REG_SIZE);
#endif
const struct thread_handlers *generic_boot_get_handlers(void)
{
return &handlers;
}
static void main_fiq(void)
{
panic();
}
void console_init(void)
{
pl011_init(&console_data, CONSOLE_UART_BASE, CONSOLE_UART_CLK_IN_HZ,
CONSOLE_BAUDRATE);
register_serial_console(&console_data.chip);
}
vaddr_t nsec_periph_base(paddr_t pa)
{
if (cpu_mmu_enabled())
return (vaddr_t)phys_to_virt(pa, MEM_AREA_IO_NSEC);
return (vaddr_t)pa;
}
#ifdef CFG_SPI
void spi_init(void)
{
uint32_t shifted_val, read_val;
vaddr_t peri_base = nsec_periph_base(PERI_BASE);
vaddr_t pmx0_base = nsec_periph_base(PMX0_BASE);
vaddr_t pmx1_base = nsec_periph_base(PMX1_BASE);
DMSG("take SPI0 out of reset\n");
shifted_val = PERI_RST3_SSP;
/*
* no need to read PERI_SC_PERIPH_RSTDIS3 first
* as all the bits are processed and cleared after writing
*/
write32(shifted_val, peri_base + PERI_SC_PERIPH_RSTDIS3);
DMSG("PERI_SC_PERIPH_RSTDIS3: 0x%x\n",
read32(peri_base + PERI_SC_PERIPH_RSTDIS3));
/*
* wait until the requested device is out of reset
* and ready to be used
*/
do {
read_val = read32(peri_base + PERI_SC_PERIPH_RSTSTAT3);
} while (read_val & shifted_val);
DMSG("PERI_SC_PERIPH_RSTSTAT3: 0x%x\n", read_val);
DMSG("enable SPI clock\n");
/*
* no need to read PERI_SC_PERIPH_CLKEN3 first
* as all the bits are processed and cleared after writing
*/
shifted_val = PERI_CLK3_SSP;
write32(shifted_val, peri_base + PERI_SC_PERIPH_CLKEN3);
DMSG("PERI_SC_PERIPH_CLKEN3: 0x%x\n",
read32(peri_base + PERI_SC_PERIPH_CLKEN3));
DMSG("PERI_SC_PERIPH_CLKSTAT3: 0x%x\n",
read32(peri_base + PERI_SC_PERIPH_CLKSTAT3));
/*
* GPIO6_2 can be configured as PINMUX_GPIO, but as PINMUX_SPI, HW IP
* will control the chip select pin so we don't have to manually do it.
* The only concern is that the IP will pulse it between each packet,
* which might not work with certain clients. There seems to be no
* option to configure it to stay enabled for the total duration of the
* transfer.
* ref: http://infocenter.arm.com/help/topic/com.arm.doc.ddi0194h/CJACFAFG.html
*/
DMSG("configure gpio6 pins 0-3 as SPI\n");
write32(PINMUX_SPI, pmx0_base + PMX0_IOMG104);
write32(PINMUX_SPI, pmx0_base + PMX0_IOMG105);
write32(PINMUX_SPI, pmx0_base + PMX0_IOMG106);
write32(PINMUX_SPI, pmx0_base + PMX0_IOMG107);
DMSG("configure gpio6 pins 0-3 as nopull\n");
write32(PINCFG_NOPULL, pmx1_base + PMX1_IOCG104);
write32(PINCFG_NOPULL, pmx1_base + PMX1_IOCG105);
write32(PINCFG_NOPULL, pmx1_base + PMX1_IOCG106);
write32(PINCFG_NOPULL, pmx1_base + PMX1_IOCG107);
#ifdef CFG_SPI_TEST
spi_test();
#endif
}
#endif
static TEE_Result peripherals_init(void)
{
vaddr_t pmussi_base = nsec_periph_base(PMUSSI_BASE);
DMSG("enable LD021_1V8 source (pin 35) on LS connector\n");
/*
* Mezzanine cards usually use this to source level shifters for
* UART, GPIO, SPI, I2C, etc so if not enabled, connected
* peripherals will not work either (during bootloader stage)
* until linux is booted.
*/
io_mask8(pmussi_base + PMUSSI_LDO21_REG_ADJ, PMUSSI_LDO21_REG_VL_1V8,
PMUSSI_LDO21_REG_VL_MASK);
write8(PMUSSI_ENA_LDO21, pmussi_base + PMUSSI_ENA_LDO17_22);
#ifdef CFG_SPI
spi_init();
#endif
return TEE_SUCCESS;
}
driver_init(peripherals_init);
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