234 lines
5.6 KiB
C
234 lines
5.6 KiB
C
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/*
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* arch/powerpc/platforms/83xx/mpc832x_rdb.c
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*
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* Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
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*
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* Description:
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* MPC832x RDB board specific routines.
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* This file is based on mpc832x_mds.c and mpc8313_rdb.c
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* Author: Michael Barkowski <michael.barkowski@freescale.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/mmc_spi.h>
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#include <linux/mmc/host.h>
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#include <linux/of_platform.h>
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#include <linux/fsl_devices.h>
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#include <asm/time.h>
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#include <asm/ipic.h>
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#include <asm/udbg.h>
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#include <soc/fsl/qe/qe.h>
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#include <soc/fsl/qe/qe_ic.h>
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#include <sysdev/fsl_soc.h>
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#include <sysdev/fsl_pci.h>
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#include "mpc83xx.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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#ifdef CONFIG_QUICC_ENGINE
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static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
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struct spi_board_info *board_infos,
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unsigned int num_board_infos,
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void (*cs_control)(struct spi_device *dev,
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bool on))
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{
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struct device_node *np;
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unsigned int i = 0;
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for_each_compatible_node(np, type, compatible) {
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int ret;
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unsigned int j;
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const void *prop;
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struct resource res[2];
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struct platform_device *pdev;
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struct fsl_spi_platform_data pdata = {
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.cs_control = cs_control,
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};
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memset(res, 0, sizeof(res));
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pdata.sysclk = sysclk;
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prop = of_get_property(np, "reg", NULL);
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if (!prop)
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goto err;
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pdata.bus_num = *(u32 *)prop;
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prop = of_get_property(np, "cell-index", NULL);
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if (prop)
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i = *(u32 *)prop;
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prop = of_get_property(np, "mode", NULL);
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if (prop && !strcmp(prop, "cpu-qe"))
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pdata.flags = SPI_QE_CPU_MODE;
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for (j = 0; j < num_board_infos; j++) {
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if (board_infos[j].bus_num == pdata.bus_num)
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pdata.max_chipselect++;
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}
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if (!pdata.max_chipselect)
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continue;
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ret = of_address_to_resource(np, 0, &res[0]);
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if (ret)
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goto err;
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ret = of_irq_to_resource(np, 0, &res[1]);
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if (!ret)
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goto err;
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pdev = platform_device_alloc("mpc83xx_spi", i);
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if (!pdev)
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goto err;
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ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
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if (ret)
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goto unreg;
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ret = platform_device_add_resources(pdev, res,
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ARRAY_SIZE(res));
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if (ret)
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goto unreg;
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ret = platform_device_add(pdev);
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if (ret)
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goto unreg;
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goto next;
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unreg:
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platform_device_del(pdev);
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err:
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pr_err("%s: registration failed\n", np->full_name);
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next:
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i++;
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}
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return i;
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}
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static int __init fsl_spi_init(struct spi_board_info *board_infos,
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unsigned int num_board_infos,
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void (*cs_control)(struct spi_device *spi,
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bool on))
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{
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u32 sysclk = -1;
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int ret;
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/* SPI controller is either clocked from QE or SoC clock */
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sysclk = get_brgfreq();
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if (sysclk == -1) {
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sysclk = fsl_get_sys_freq();
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if (sysclk == -1)
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return -ENODEV;
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}
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ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
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num_board_infos, cs_control);
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if (!ret)
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of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
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num_board_infos, cs_control);
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return spi_register_board_info(board_infos, num_board_infos);
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}
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static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
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{
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pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
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par_io_data_set(3, 13, on);
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}
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static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
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.ocr_mask = MMC_VDD_33_34,
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};
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static struct spi_board_info mpc832x_spi_boardinfo = {
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.bus_num = 0x4c0,
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.chip_select = 0,
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.max_speed_hz = 50000000,
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.modalias = "mmc_spi",
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.platform_data = &mpc832x_mmc_pdata,
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};
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static int __init mpc832x_spi_init(void)
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{
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par_io_config_pin(3, 0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
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par_io_config_pin(3, 1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
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par_io_config_pin(3, 2, 3, 0, 1, 0); /* SPI1 CLK, I/O */
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par_io_config_pin(3, 3, 2, 0, 1, 0); /* SPI1 SEL, I */
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par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS, O */
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par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
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par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */
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/*
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* Don't bother with legacy stuff when device tree contains
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* mmc-spi-slot node.
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*/
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if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot"))
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return 0;
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return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
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}
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machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
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#endif /* CONFIG_QUICC_ENGINE */
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/* ************************************************************************
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*
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* Setup the architecture
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*
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*/
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static void __init mpc832x_rdb_setup_arch(void)
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{
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#if defined(CONFIG_QUICC_ENGINE)
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struct device_node *np;
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#endif
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mpc83xx_setup_arch();
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#ifdef CONFIG_QUICC_ENGINE
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if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
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par_io_init(np);
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of_node_put(np);
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for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
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par_io_of_config(np);
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}
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#endif /* CONFIG_QUICC_ENGINE */
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}
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machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init mpc832x_rdb_probe(void)
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{
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return of_machine_is_compatible("MPC832xRDB");
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}
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define_machine(mpc832x_rdb) {
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.name = "MPC832x RDB",
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.probe = mpc832x_rdb_probe,
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.setup_arch = mpc832x_rdb_setup_arch,
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.init_IRQ = mpc83xx_ipic_and_qe_init_IRQ,
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.get_irq = ipic_get_irq,
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.restart = mpc83xx_restart,
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.time_init = mpc83xx_time_init,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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