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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/powerpc/platforms/83xx/mpc832x_rdb.c
*
* Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
*
* Description:
* MPC832x RDB board specific routines.
* This file is based on mpc832x_mds.c and mpc8313_rdb.c
* Author: Michael Barkowski <michael.barkowski@freescale.com>
*/
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/mmc/host.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/fsl_devices.h>
#include <asm/time.h>
#include <asm/ipic.h>
#include <asm/udbg.h>
#include <soc/fsl/qe/qe.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include "mpc83xx.h"
#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
#ifdef CONFIG_QUICC_ENGINE
static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
struct spi_board_info *board_infos,
unsigned int num_board_infos,
void (*cs_control)(struct spi_device *dev,
bool on))
{
struct device_node *np;
unsigned int i = 0;
for_each_compatible_node(np, type, compatible) {
int ret;
unsigned int j;
const void *prop;
struct resource res[2];
struct platform_device *pdev;
struct fsl_spi_platform_data pdata = {
.cs_control = cs_control,
};
memset(res, 0, sizeof(res));
pdata.sysclk = sysclk;
prop = of_get_property(np, "reg", NULL);
if (!prop)
goto err;
pdata.bus_num = *(u32 *)prop;
prop = of_get_property(np, "cell-index", NULL);
if (prop)
i = *(u32 *)prop;
prop = of_get_property(np, "mode", NULL);
if (prop && !strcmp(prop, "cpu-qe"))
pdata.flags = SPI_QE_CPU_MODE;
for (j = 0; j < num_board_infos; j++) {
if (board_infos[j].bus_num == pdata.bus_num)
pdata.max_chipselect++;
}
if (!pdata.max_chipselect)
continue;
ret = of_address_to_resource(np, 0, &res[0]);
if (ret)
goto err;
ret = of_irq_to_resource(np, 0, &res[1]);
if (ret <= 0)
goto err;
pdev = platform_device_alloc("mpc83xx_spi", i);
if (!pdev)
goto err;
ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
if (ret)
goto unreg;
ret = platform_device_add_resources(pdev, res,
ARRAY_SIZE(res));
if (ret)
goto unreg;
ret = platform_device_add(pdev);
if (ret)
goto unreg;
goto next;
unreg:
platform_device_del(pdev);
err:
pr_err("%pOF: registration failed\n", np);
next:
i++;
}
return i;
}
static int __init fsl_spi_init(struct spi_board_info *board_infos,
unsigned int num_board_infos,
void (*cs_control)(struct spi_device *spi,
bool on))
{
u32 sysclk = -1;
int ret;
/* SPI controller is either clocked from QE or SoC clock */
sysclk = get_brgfreq();
if (sysclk == -1) {
sysclk = fsl_get_sys_freq();
if (sysclk == -1)
return -ENODEV;
}
ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
num_board_infos, cs_control);
if (!ret)
of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
num_board_infos, cs_control);
return spi_register_board_info(board_infos, num_board_infos);
}
static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
{
pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
par_io_data_set(3, 13, on);
}
static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
.ocr_mask = MMC_VDD_33_34,
};
static struct spi_board_info mpc832x_spi_boardinfo = {
.bus_num = 0x4c0,
.chip_select = 0,
.max_speed_hz = 50000000,
.modalias = "mmc_spi",
.platform_data = &mpc832x_mmc_pdata,
};
static int __init mpc832x_spi_init(void)
{
struct device_node *np;
par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */
par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */
par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */
par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */
/*
* Don't bother with legacy stuff when device tree contains
* mmc-spi-slot node.
*/
np = of_find_compatible_node(NULL, NULL, "mmc-spi-slot");
of_node_put(np);
if (np)
return 0;
return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
}
machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
#endif /* CONFIG_QUICC_ENGINE */
/* ************************************************************************
*
* Setup the architecture
*
*/
static void __init mpc832x_rdb_setup_arch(void)
{
#if defined(CONFIG_QUICC_ENGINE)
struct device_node *np;
#endif
mpc83xx_setup_arch();
#ifdef CONFIG_QUICC_ENGINE
if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
par_io_init(np);
of_node_put(np);
for_each_node_by_name(np, "ucc")
par_io_of_config(np);
}
#endif /* CONFIG_QUICC_ENGINE */
}
machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init mpc832x_rdb_probe(void)
{
return of_machine_is_compatible("MPC832xRDB");
}
define_machine(mpc832x_rdb) {
.name = "MPC832x RDB",
.probe = mpc832x_rdb_probe,
.setup_arch = mpc832x_rdb_setup_arch,
.discover_phbs = mpc83xx_setup_pci,
.init_IRQ = mpc83xx_ipic_init_IRQ,
.get_irq = ipic_get_irq,
.restart = mpc83xx_restart,
.time_init = mpc83xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
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