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