arch/powerpc/platforms/83xx/mpc832x_rdb.c

   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
  43 static 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)
  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;
 113 unreg:
 114                 platform_device_del(pdev);
 115 err:
 116                 pr_err("%s: registration failed\n", np->full_name);
 117 next:
 118                 i++;
 119         }
 120
 121         return i;
 122 }
 123
 124 static 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
 149 static 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
 155 static struct mmc_spi_platform_data mpc832x_mmc_pdata = {
 156         .ocr_mask = MMC_VDD_33_34,
 157 };
 158
 159 static 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
 167 static 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 }
 186 machine_device_initcall(mpc832x_rdb, mpc832x_spi_init);
 187 #endif /* CONFIG_QUICC_ENGINE */
 188
 189 /* ************************************************************************
 190  *
 191  * Setup the architecture
 192  *
 193  */
 194 static 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
 213 machine_device_initcall(mpc832x_rdb, mpc83xx_declare_of_platform_devices);
 214
 215 /*
 216  * Called very early, MMU is off, device-tree isn't unflattened
 217  */
 218 static int __init mpc832x_rdb_probe(void)
 219 {
 220         return of_machine_is_compatible("MPC832xRDB");
 221 }
 222
 223 define_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 };