linux/arch/powerpc/platforms/83xx/mpc832x_rdb.c
<<
>>
Prefs
   1/*
   2 * arch/powerpc/platforms/83xx/mpc832x_rdb.c
   3 *
   4 * Copyright (C) Freescale Semiconductor, Inc. 2007. All rights reserved.
   5 *
   6 * Description:
   7 * MPC832x RDB board specific routines.
   8 * This file is based on mpc832x_mds.c and mpc8313_rdb.c
   9 * Author: Michael Barkowski <michael.barkowski@freescale.com>
  10 *
  11 * This program is free software; you can redistribute  it and/or modify it
  12 * under  the terms of  the GNU General  Public License as published by the
  13 * Free Software Foundation;  either version 2 of the  License, or (at your
  14 * option) any later version.
  15 */
  16
  17#include <linux/pci.h>
  18#include <linux/interrupt.h>
  19#include <linux/spi/spi.h>
  20#include <linux/spi/mmc_spi.h>
  21#include <linux/mmc/host.h>
  22#include <linux/of_platform.h>
  23#include <linux/fsl_devices.h>
  24
  25#include <asm/time.h>
  26#include <asm/ipic.h>
  27#include <asm/udbg.h>
  28#include <soc/fsl/qe/qe.h>
  29#include <soc/fsl/qe/qe_ic.h>
  30#include <sysdev/fsl_soc.h>
  31#include <sysdev/fsl_pci.h>
  32
  33#include "mpc83xx.h"
  34
  35#undef DEBUG
  36#ifdef DEBUG
  37#define DBG(fmt...) udbg_printf(fmt)
  38#else
  39#define DBG(fmt...)
  40#endif
  41
  42#ifdef CONFIG_QUICC_ENGINE
  43static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
  44                                   struct spi_board_info *board_infos,
  45                                   unsigned int num_board_infos,
  46                                   void (*cs_control)(struct spi_device *dev,
  47                                                      bool on))
  48{
  49        struct device_node *np;
  50        unsigned int i = 0;
  51
  52        for_each_compatible_node(np, type, compatible) {
  53                int ret;
  54                unsigned int j;
  55                const void *prop;
  56                struct resource res[2];
  57                struct platform_device *pdev;
  58                struct fsl_spi_platform_data pdata = {
  59                        .cs_control = cs_control,
  60                };
  61
  62                memset(res, 0, sizeof(res));
  63
  64                pdata.sysclk = sysclk;
  65
  66                prop = of_get_property(np, "reg", NULL);
  67                if (!prop)
  68                        goto err;
  69                pdata.bus_num = *(u32 *)prop;
  70
  71                prop = of_get_property(np, "cell-index", NULL);
  72                if (prop)
  73                        i = *(u32 *)prop;
  74
  75                prop = of_get_property(np, "mode", NULL);
  76                if (prop && !strcmp(prop, "cpu-qe"))
  77                        pdata.flags = SPI_QE_CPU_MODE;
  78
  79                for (j = 0; j < num_board_infos; j++) {
  80                        if (board_infos[j].bus_num == pdata.bus_num)
  81                                pdata.max_chipselect++;
  82                }
  83
  84                if (!pdata.max_chipselect)
  85                        continue;
  86
  87                ret = of_address_to_resource(np, 0, &res[0]);
  88                if (ret)
  89                        goto err;
  90
  91                ret = of_irq_to_resource(np, 0, &res[1]);
  92                if (ret <= 0)
  93                        goto err;
  94
  95                pdev = platform_device_alloc("mpc83xx_spi", i);
  96                if (!pdev)
  97                        goto err;
  98
  99                ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
 100                if (ret)
 101                        goto unreg;
 102
 103                ret = platform_device_add_resources(pdev, res,
 104                                                    ARRAY_SIZE(res));
 105                if (ret)
 106                        goto unreg;
 107
 108                ret = platform_device_add(pdev);
 109                if (ret)
 110                        goto unreg;
 111
 112                goto next;
 113unreg:
 114                platform_device_del(pdev);
 115err:
 116                pr_err("%pOF: registration failed\n", np);
 117next:
 118                i++;
 119        }
 120
 121        return i;
 122}
 123
 124static int __init fsl_spi_init(struct spi_board_info *board_infos,
 125                               unsigned int num_board_infos,
 126                               void (*cs_control)(struct spi_device *spi,
 127                                                  bool on))
 128{
 129        u32 sysclk = -1;
 130        int ret;
 131
 132        /* SPI controller is either clocked from QE or SoC clock */
 133        sysclk = get_brgfreq();
 134        if (sysclk == -1) {
 135                sysclk = fsl_get_sys_freq();
 136                if (sysclk == -1)
 137                        return -ENODEV;
 138        }
 139
 140        ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,
 141                               num_board_infos, cs_control);
 142        if (!ret)
 143                of_fsl_spi_probe("spi", "fsl_spi", sysclk, board_infos,
 144                                 num_board_infos, cs_control);
 145
 146        return spi_register_board_info(board_infos, num_board_infos);
 147}
 148
 149static void mpc83xx_spi_cs_control(struct spi_device *spi, bool on)
 150{
 151        pr_debug("%s %d %d\n", __func__, spi->chip_select, on);
 152        par_io_data_set(3, 13, on);
 153}
 154
 155static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
 156        .ocr_mask = MMC_VDD_33_34,
 157};
 158
 159static struct spi_board_info mpc832x_spi_boardinfo = {
 160        .bus_num = 0x4c0,
 161        .chip_select = 0,
 162        .max_speed_hz = 50000000,
 163        .modalias = "mmc_spi",
 164        .platform_data = &mpc832x_mmc_pdata,
 165};
 166
 167static int __init mpc832x_spi_init(void)
 168{
 169        par_io_config_pin(3,  0, 3, 0, 1, 0); /* SPI1 MOSI, I/O */
 170        par_io_config_pin(3,  1, 3, 0, 1, 0); /* SPI1 MISO, I/O */
 171        par_io_config_pin(3,  2, 3, 0, 1, 0); /* SPI1 CLK,  I/O */
 172        par_io_config_pin(3,  3, 2, 0, 1, 0); /* SPI1 SEL,  I   */
 173
 174        par_io_config_pin(3, 13, 1, 0, 0, 0); /* !SD_CS,    O */
 175        par_io_config_pin(3, 14, 2, 0, 0, 0); /* SD_INSERT, I */
 176        par_io_config_pin(3, 15, 2, 0, 0, 0); /* SD_PROTECT,I */
 177
 178        /*
 179         * Don't bother with legacy stuff when device tree contains
 180         * mmc-spi-slot node.
 181         */
 182        if (of_find_compatible_node(NULL, NULL, "mmc-spi-slot"))
 183                return 0;
 184        return fsl_spi_init(&mpc832x_spi_boardinfo, 1, mpc83xx_spi_cs_control);
 185}
 186machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
 187#endif /* CONFIG_QUICC_ENGINE */
 188
 189/* ************************************************************************
 190 *
 191 * Setup the architecture
 192 *
 193 */
 194static void __init mpc832x_rdb_setup_arch(void)
 195{
 196#if defined(CONFIG_QUICC_ENGINE)
 197        struct device_node *np;
 198#endif
 199
 200        mpc83xx_setup_arch();
 201
 202#ifdef CONFIG_QUICC_ENGINE
 203        if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
 204                par_io_init(np);
 205                of_node_put(np);
 206
 207                for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
 208                        par_io_of_config(np);
 209        }
 210#endif                          /* CONFIG_QUICC_ENGINE */
 211}
 212
 213machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
 214
 215/*
 216 * Called very early, MMU is off, device-tree isn't unflattened
 217 */
 218static int __init mpc832x_rdb_probe(void)
 219{
 220        return of_machine_is_compatible("MPC832xRDB");
 221}
 222
 223define_machine(mpc832x_rdb) {
 224        .name           = "MPC832x RDB",
 225        .probe          = mpc832x_rdb_probe,
 226        .setup_arch     = mpc832x_rdb_setup_arch,
 227        .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
 228        .get_irq        = ipic_get_irq,
 229        .restart        = mpc83xx_restart,
 230        .time_init      = mpc83xx_time_init,
 231        .calibrate_decr = generic_calibrate_decr,
 232        .progress       = udbg_progress,
 233};
 234