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/*
* (C) Copyright 2013 Keymile AG
* Valentin Longchamp <valentin.longchamp@keymile.com>
*
* Copyright 2007-2011 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <pci.h>
#include <asm/fsl_pci.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <asm/fsl_serdes.h>
#include <linux/errno.h>
#include "kmp204x.h"
#define PROM_SEL_L 11
/* control the PROM_SEL_L signal*/
static void toggle_fpga_eeprom_bus(bool cpu_own)
{
qrio_gpio_direction_output(GPIO_A, PROM_SEL_L, !cpu_own);
}
#define CONF_SEL_L 10
#define FPGA_PROG_L 19
#define FPGA_DONE 18
#define FPGA_INIT_L 17
int trigger_fpga_config(void)
{
int ret = 0, init_l;
/* approx 10ms */
u32 timeout = 10000;
/* make sure the FPGA_can access the EEPROM */
toggle_fpga_eeprom_bus(false);
/* assert CONF_SEL_L to be able to drive FPGA_PROG_L */
qrio_gpio_direction_output(GPIO_A, CONF_SEL_L, 0);
/* trigger the config start */
qrio_gpio_direction_output(GPIO_A, FPGA_PROG_L, 0);
/* small delay for INIT_L line */
udelay(10);
/* wait for FPGA_INIT to be asserted */
do {
init_l = qrio_get_gpio(GPIO_A, FPGA_INIT_L);
if (timeout-- == 0) {
printf("FPGA_INIT timeout\n");
ret = -EFAULT;
break;
}
udelay(10);
} while (init_l);
/* deassert FPGA_PROG, config should start */
qrio_set_gpio(GPIO_A, FPGA_PROG_L, 1);
return ret;
}
/* poll the FPGA_DONE signal and give the EEPROM back to the QorIQ */
static int wait_for_fpga_config(void)
{
int ret = 0, done;
/* approx 5 s */
u32 timeout = 500000;
printf("PCIe FPGA config:");
do {
done = qrio_get_gpio(GPIO_A, FPGA_DONE);
if (timeout-- == 0) {
printf(" FPGA_DONE timeout\n");
ret = -EFAULT;
goto err_out;
}
udelay(10);
} while (!done);
printf(" done\n");
err_out:
/* deactive CONF_SEL and give the CPU conf EEPROM access */
qrio_set_gpio(GPIO_A, CONF_SEL_L, 1);
toggle_fpga_eeprom_bus(true);
return ret;
}
#define PCIE_SW_RST 14
#define PEXHC_RST 13
#define HOOPER_RST 12
void pci_init_board(void)
{
qrio_prstcfg(PCIE_SW_RST, PRSTCFG_POWUP_UNIT_CORE_RST);
qrio_prstcfg(PEXHC_RST, PRSTCFG_POWUP_UNIT_CORE_RST);
qrio_prstcfg(HOOPER_RST, PRSTCFG_POWUP_UNIT_CORE_RST);
/* wait for the PCIe FPGA to be configured
* it has been triggered earlier in board_early_init_r */
if (wait_for_fpga_config())
printf("error finishing PCIe FPGA config\n");
qrio_prst(PCIE_SW_RST, false, false);
qrio_prst(PEXHC_RST, false, false);
qrio_prst(HOOPER_RST, false, false);
/* Hooper is not direcly PCIe capable */
mdelay(50);
fsl_pcie_init_board(0);
}
void pci_of_setup(void *blob, bd_t *bd)
{
FT_FSL_PCI_SETUP;
}
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