LXR linux/arch/powerpc/platforms/82xx/km82xx.c

   1/*
   2 * Keymile km82xx support
   3 * Copyright 2008-2011 DENX Software Engineering GmbH
   4 * Author: Heiko Schocher <hs@denx.de>
   5 *
   6 * based on code from:
   7 * Copyright 2007 Freescale Semiconductor, Inc.
   8 * Author: Scott Wood <scottwood@freescale.com>
   9 *
  10 * This program is free software; you can redistribute  it and/or modify it
  11 * under  the terms of  the GNU General  Public License as published by the
  12 * Free Software Foundation;  either version 2 of the  License, or (at your
  13 * option) any later version.
  14 */
  15
  16#include <linux/init.h>
  17#include <linux/interrupt.h>
  18#include <linux/fsl_devices.h>
  19#include <linux/of_platform.h>
  20
  21#include <linux/io.h>
  22#include <asm/cpm2.h>
  23#include <asm/udbg.h>
  24#include <asm/machdep.h>
  25#include <linux/time.h>
  26#include <asm/mpc8260.h>
  27#include <asm/prom.h>
  28
  29#include <sysdev/fsl_soc.h>
  30#include <sysdev/cpm2_pic.h>
  31
  32#include "pq2.h"
  33
  34static void __init km82xx_pic_init(void)
  35{
  36        struct device_node *np = of_find_compatible_node(NULL, NULL,
  37                                                        "fsl,pq2-pic");
  38        if (!np) {
  39                pr_err("PIC init: can not find cpm-pic node\n");
  40                return;
  41        }
  42
  43        cpm2_pic_init(np);
  44        of_node_put(np);
  45}
  46
  47struct cpm_pin {
  48        int port, pin, flags;
  49};
  50
  51static __initdata struct cpm_pin km82xx_pins[] = {
  52        /* SMC1 */
  53        {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  54        {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  55
  56        /* SMC2 */
  57        {0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  58        {0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  59
  60        /* SCC1 */
  61        {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  62        {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  63        {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  64        {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  65
  66        /* SCC4 */
  67        {2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  68        {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  69        {2,  9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  70        {2,  8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  71        {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  72        {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  73
  74        /* FCC1 */
  75        {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  76        {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  77        {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  78        {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  79        {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  80        {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  81        {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  82        {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  83        {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  84        {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  85        {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  86        {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  87        {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  88        {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  89
  90        {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  91        {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  92
  93        /* FCC2 */
  94        {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  95        {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  96        {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  97        {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  98        {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  99        {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 100        {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 101        {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 102        {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 103        {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 104        {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 105        {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 106        {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 107        {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 108
 109        {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 110        {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 111
 112        /* MDC */
 113        {0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO},
 114
 115#if defined(CONFIG_I2C_CPM)
 116        /* I2C */
 117        {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 118        {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 119#endif
 120
 121        /* USB */
 122        {0, 10, CPM_PIN_OUTPUT | CPM_PIN_GPIO},    /* FULL_SPEED */
 123        {0, 11, CPM_PIN_OUTPUT | CPM_PIN_GPIO},    /*/SLAVE */
 124        {2, 10, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXN */
 125        {2, 11, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXP */
 126        {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* /OE */
 127        {2, 27, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXCLK */
 128        {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXP */
 129        {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXN */
 130        {3, 25, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXD */
 131
 132        /* SPI */
 133        {3, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MISO PD16 */
 134        {3, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MOSI PD17 */
 135        {3, 18, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_CLK PD18 */
 136};
 137
 138static void __init init_ioports(void)
 139{
 140        int i;
 141
 142        for (i = 0; i < ARRAY_SIZE(km82xx_pins); i++) {
 143                const struct cpm_pin *pin = &km82xx_pins[i];
 144                cpm2_set_pin(pin->port, pin->pin, pin->flags);
 145        }
 146
 147        cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8);
 148        cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
 149        cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_RX);
 150        cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_TX);
 151        cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RTX);
 152        cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX);
 153        cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX);
 154        cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX);
 155        cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9,  CPM_CLK_TX);
 156        cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 157        cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 158
 159        /* Force USB FULL SPEED bit to '1' */
 160        setbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 10));
 161        /* clear USB_SLAVE */
 162        clrbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 11));
 163}
 164
 165static void __init km82xx_setup_arch(void)
 166{
 167        if (ppc_md.progress)
 168                ppc_md.progress("km82xx_setup_arch()", 0);
 169
 170        cpm2_reset();
 171
 172        /* When this is set, snooping CPM DMA from RAM causes
 173         * machine checks.  See erratum SIU18.
 174         */
 175        clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
 176
 177        init_ioports();
 178
 179        if (ppc_md.progress)
 180                ppc_md.progress("km82xx_setup_arch(), finish", 0);
 181}
 182
 183static  __initdata struct of_device_id of_bus_ids[] = {
 184        { .compatible = "simple-bus", },
 185        {},
 186};
 187
 188static int __init declare_of_platform_devices(void)
 189{
 190        of_platform_bus_probe(NULL, of_bus_ids, NULL);
 191
 192        return 0;
 193}
 194machine_device_initcall(km82xx, declare_of_platform_devices);
 195
 196/*
 197 * Called very early, device-tree isn't unflattened
 198 */
 199static int __init km82xx_probe(void)
 200{
 201        unsigned long root = of_get_flat_dt_root();
 202        return of_flat_dt_is_compatible(root, "keymile,km82xx");
 203}
 204
 205define_machine(km82xx)
 206{
 207        .name = "Keymile km82xx",
 208        .probe = km82xx_probe,
 209        .setup_arch = km82xx_setup_arch,
 210        .init_IRQ = km82xx_pic_init,
 211        .get_irq = cpm2_get_irq,
 212        .calibrate_decr = generic_calibrate_decr,
 213        .restart = pq2_restart,
 214        .progress = udbg_progress,
 215};
 216