linux/arch/powerpc/platforms/83xx/mpc836x_mds.c
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   1/*
   2 * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
   3 *
   4 * Author: Li Yang <LeoLi@freescale.com>
   5 *         Yin Olivia <Hong-hua.Yin@freescale.com>
   6 *
   7 * Description:
   8 * MPC8360E MDS board specific routines.
   9 *
  10 * Changelog:
  11 * Jun 21, 2006 Initial version
  12 *
  13 * This program is free software; you can redistribute it and/or modify it
  14 * under  the terms of  the GNU General  Public License as published by the
  15 * Free Software Foundation;  either version 2 of the  License, or (at your
  16 * option) any later version.
  17 */
  18
  19#include <linux/stddef.h>
  20#include <linux/kernel.h>
  21#include <linux/compiler.h>
  22#include <linux/init.h>
  23#include <linux/errno.h>
  24#include <linux/reboot.h>
  25#include <linux/pci.h>
  26#include <linux/kdev_t.h>
  27#include <linux/major.h>
  28#include <linux/console.h>
  29#include <linux/delay.h>
  30#include <linux/seq_file.h>
  31#include <linux/root_dev.h>
  32#include <linux/initrd.h>
  33#include <linux/of_platform.h>
  34#include <linux/of_device.h>
  35
  36#include <asm/system.h>
  37#include <linux/atomic.h>
  38#include <asm/time.h>
  39#include <asm/io.h>
  40#include <asm/machdep.h>
  41#include <asm/ipic.h>
  42#include <asm/irq.h>
  43#include <asm/prom.h>
  44#include <asm/udbg.h>
  45#include <sysdev/fsl_soc.h>
  46#include <sysdev/fsl_pci.h>
  47#include <sysdev/simple_gpio.h>
  48#include <asm/qe.h>
  49#include <asm/qe_ic.h>
  50
  51#include "mpc83xx.h"
  52
  53#undef DEBUG
  54#ifdef DEBUG
  55#define DBG(fmt...) udbg_printf(fmt)
  56#else
  57#define DBG(fmt...)
  58#endif
  59
  60/* ************************************************************************
  61 *
  62 * Setup the architecture
  63 *
  64 */
  65static void __init mpc836x_mds_setup_arch(void)
  66{
  67        struct device_node *np;
  68        u8 __iomem *bcsr_regs = NULL;
  69
  70        if (ppc_md.progress)
  71                ppc_md.progress("mpc836x_mds_setup_arch()", 0);
  72
  73        /* Map BCSR area */
  74        np = of_find_node_by_name(NULL, "bcsr");
  75        if (np) {
  76                struct resource res;
  77
  78                of_address_to_resource(np, 0, &res);
  79                bcsr_regs = ioremap(res.start, resource_size(&res));
  80                of_node_put(np);
  81        }
  82
  83        mpc83xx_setup_pci();
  84
  85#ifdef CONFIG_QUICC_ENGINE
  86        qe_reset();
  87
  88        if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
  89                par_io_init(np);
  90                of_node_put(np);
  91
  92                for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
  93                        par_io_of_config(np);
  94#ifdef CONFIG_QE_USB
  95                /* Must fixup Par IO before QE GPIO chips are registered. */
  96                par_io_config_pin(1,  2, 1, 0, 3, 0); /* USBOE  */
  97                par_io_config_pin(1,  3, 1, 0, 3, 0); /* USBTP  */
  98                par_io_config_pin(1,  8, 1, 0, 1, 0); /* USBTN  */
  99                par_io_config_pin(1, 10, 2, 0, 3, 0); /* USBRXD */
 100                par_io_config_pin(1,  9, 2, 1, 3, 0); /* USBRP  */
 101                par_io_config_pin(1, 11, 2, 1, 3, 0); /* USBRN  */
 102                par_io_config_pin(2, 20, 2, 0, 1, 0); /* CLK21  */
 103#endif /* CONFIG_QE_USB */
 104        }
 105
 106        if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
 107                        != NULL){
 108                uint svid;
 109
 110                /* Reset the Ethernet PHY */
 111#define BCSR9_GETHRST 0x20
 112                clrbits8(&bcsr_regs[9], BCSR9_GETHRST);
 113                udelay(1000);
 114                setbits8(&bcsr_regs[9], BCSR9_GETHRST);
 115
 116                /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
 117                svid = mfspr(SPRN_SVR);
 118                if (svid == 0x80480021) {
 119                        void __iomem *immap;
 120
 121                        immap = ioremap(get_immrbase() + 0x14a8, 8);
 122
 123                        /*
 124                         * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
 125                         * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
 126                         */
 127                        setbits32(immap, 0x0c003000);
 128
 129                        /*
 130                         * IMMR + 0x14AC[20:27] = 10101010
 131                         * (data delay for both UCC's)
 132                         */
 133                        clrsetbits_be32(immap + 4, 0xff0, 0xaa0);
 134
 135                        iounmap(immap);
 136                }
 137
 138                iounmap(bcsr_regs);
 139                of_node_put(np);
 140        }
 141#endif                          /* CONFIG_QUICC_ENGINE */
 142}
 143
 144machine_device_initcall(mpc836x_mds, mpc83xx_declare_of_platform_devices);
 145
 146#ifdef CONFIG_QE_USB
 147static int __init mpc836x_usb_cfg(void)
 148{
 149        u8 __iomem *bcsr;
 150        struct device_node *np;
 151        const char *mode;
 152        int ret = 0;
 153
 154        np = of_find_compatible_node(NULL, NULL, "fsl,mpc8360mds-bcsr");
 155        if (!np)
 156                return -ENODEV;
 157
 158        bcsr = of_iomap(np, 0);
 159        of_node_put(np);
 160        if (!bcsr)
 161                return -ENOMEM;
 162
 163        np = of_find_compatible_node(NULL, NULL, "fsl,mpc8323-qe-usb");
 164        if (!np) {
 165                ret = -ENODEV;
 166                goto err;
 167        }
 168
 169#define BCSR8_TSEC1M_MASK       (0x3 << 6)
 170#define BCSR8_TSEC1M_RGMII      (0x0 << 6)
 171#define BCSR8_TSEC2M_MASK       (0x3 << 4)
 172#define BCSR8_TSEC2M_RGMII      (0x0 << 4)
 173        /*
 174         * Default is GMII (2), but we should set it to RGMII (0) if we use
 175         * USB (Eth PHY is in RGMII mode anyway).
 176         */
 177        clrsetbits_8(&bcsr[8], BCSR8_TSEC1M_MASK | BCSR8_TSEC2M_MASK,
 178                               BCSR8_TSEC1M_RGMII | BCSR8_TSEC2M_RGMII);
 179
 180#define BCSR13_USBMASK  0x0f
 181#define BCSR13_nUSBEN   0x08 /* 1 - Disable, 0 - Enable                 */
 182#define BCSR13_USBSPEED 0x04 /* 1 - Full, 0 - Low                       */
 183#define BCSR13_USBMODE  0x02 /* 1 - Host, 0 - Function                  */
 184#define BCSR13_nUSBVCC  0x01 /* 1 - gets VBUS, 0 - supplies VBUS        */
 185
 186        clrsetbits_8(&bcsr[13], BCSR13_USBMASK, BCSR13_USBSPEED);
 187
 188        mode = of_get_property(np, "mode", NULL);
 189        if (mode && !strcmp(mode, "peripheral")) {
 190                setbits8(&bcsr[13], BCSR13_nUSBVCC);
 191                qe_usb_clock_set(QE_CLK21, 48000000);
 192        } else {
 193                setbits8(&bcsr[13], BCSR13_USBMODE);
 194                /*
 195                 * The BCSR GPIOs are used to control power and
 196                 * speed of the USB transceiver. This is needed for
 197                 * the USB Host only.
 198                 */
 199                simple_gpiochip_init("fsl,mpc8360mds-bcsr-gpio");
 200        }
 201
 202        of_node_put(np);
 203err:
 204        iounmap(bcsr);
 205        return ret;
 206}
 207machine_arch_initcall(mpc836x_mds, mpc836x_usb_cfg);
 208#endif /* CONFIG_QE_USB */
 209
 210/*
 211 * Called very early, MMU is off, device-tree isn't unflattened
 212 */
 213static int __init mpc836x_mds_probe(void)
 214{
 215        unsigned long root = of_get_flat_dt_root();
 216
 217        return of_flat_dt_is_compatible(root, "MPC836xMDS");
 218}
 219
 220define_machine(mpc836x_mds) {
 221        .name           = "MPC836x MDS",
 222        .probe          = mpc836x_mds_probe,
 223        .setup_arch     = mpc836x_mds_setup_arch,
 224        .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
 225        .get_irq        = ipic_get_irq,
 226        .restart        = mpc83xx_restart,
 227        .time_init      = mpc83xx_time_init,
 228        .calibrate_decr = generic_calibrate_decr,
 229        .progress       = udbg_progress,
 230};
 231