arch/powerpc/platforms/83xx/mpc836x_mds.c

   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  */
  65 static 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 #ifdef CONFIG_PCI
  84         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  85                 mpc83xx_add_bridge(np);
  86 #endif
  87
  88 #ifdef CONFIG_QUICC_ENGINE
  89         qe_reset();
  90
  91         if ((np = of_find_node_by_name(NULL, "par_io")) != NULL) {
  92                 par_io_init(np);
  93                 of_node_put(np);
  94
  95                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
  96                         par_io_of_config(np);
  97 #ifdef CONFIG_QE_USB
  98                 /* Must fixup Par IO before QE GPIO chips are registered. */
  99                 par_io_config_pin(1,  2, 1, 0, 3, 0); /* USBOE  */
 100                 par_io_config_pin(1,  3, 1, 0, 3, 0); /* USBTP  */
 101                 par_io_config_pin(1,  8, 1, 0, 1, 0); /* USBTN  */
 102                 par_io_config_pin(1, 10, 2, 0, 3, 0); /* USBRXD */
 103                 par_io_config_pin(1,  9, 2, 1, 3, 0); /* USBRP  */
 104                 par_io_config_pin(1, 11, 2, 1, 3, 0); /* USBRN  */
 105                 par_io_config_pin(2, 20, 2, 0, 1, 0); /* CLK21  */
 106 #endif /* CONFIG_QE_USB */
 107         }
 108
 109         if ((np = of_find_compatible_node(NULL, "network", "ucc_geth"))
 110                         != NULL){
 111                 uint svid;
 112
 113                 /* Reset the Ethernet PHY */
 114 #define BCSR9_GETHRST 0x20
 115                 clrbits8(&bcsr_regs[9], BCSR9_GETHRST);
 116                 udelay(1000);
 117                 setbits8(&bcsr_regs[9], BCSR9_GETHRST);
 118
 119                 /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
 120                 svid = mfspr(SPRN_SVR);
 121                 if (svid == 0x80480021) {
 122                         void __iomem *immap;
 123
 124                         immap = ioremap(get_immrbase() + 0x14a8, 8);
 125
 126                         /*
 127                          * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
 128                          * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
 129                          */
 130                         setbits32(immap, 0x0c003000);
 131
 132                         /*
 133                          * IMMR + 0x14AC[20:27] = 10101010
 134                          * (data delay for both UCC's)
 135                          */
 136                         clrsetbits_be32(immap + 4, 0xff0, 0xaa0);
 137
 138                         iounmap(immap);
 139                 }
 140
 141                 iounmap(bcsr_regs);
 142                 of_node_put(np);
 143         }
 144 #endif                          /* CONFIG_QUICC_ENGINE */
 145 }
 146
 147 static struct of_device_id mpc836x_ids[] = {
 148         { .type = "soc", },
 149         { .compatible = "soc", },
 150         { .compatible = "simple-bus", },
 151         { .type = "qe", },
 152         { .compatible = "fsl,qe", },
 153         {},
 154 };
 155
 156 static int __init mpc836x_declare_of_platform_devices(void)
 157 {
 158         /* Publish the QE devices */
 159         of_platform_bus_probe(NULL, mpc836x_ids, NULL);
 160
 161         return 0;
 162 }
 163 machine_device_initcall(mpc836x_mds, mpc836x_declare_of_platform_devices);
 164
 165 #ifdef CONFIG_QE_USB
 166 static int __init mpc836x_usb_cfg(void)
 167 {
 168         u8 __iomem *bcsr;
 169         struct device_node *np;
 170         const char *mode;
 171         int ret = 0;
 172
 173         np = of_find_compatible_node(NULL, NULL, "fsl,mpc8360mds-bcsr");
 174         if (!np)
 175                 return -ENODEV;
 176
 177         bcsr = of_iomap(np, 0);
 178         of_node_put(np);
 179         if (!bcsr)
 180                 return -ENOMEM;
 181
 182         np = of_find_compatible_node(NULL, NULL, "fsl,mpc8323-qe-usb");
 183         if (!np) {
 184                 ret = -ENODEV;
 185                 goto err;
 186         }
 187
 188 #define BCSR8_TSEC1M_MASK       (0x3 << 6)
 189 #define BCSR8_TSEC1M_RGMII      (0x0 << 6)
 190 #define BCSR8_TSEC2M_MASK       (0x3 << 4)
 191 #define BCSR8_TSEC2M_RGMII      (0x0 << 4)
 192         /*
 193          * Default is GMII (2), but we should set it to RGMII (0) if we use
 194          * USB (Eth PHY is in RGMII mode anyway).
 195          */
 196         clrsetbits_8(&bcsr[8], BCSR8_TSEC1M_MASK | BCSR8_TSEC2M_MASK,
 197                                BCSR8_TSEC1M_RGMII | BCSR8_TSEC2M_RGMII);
 198
 199 #define BCSR13_USBMASK  0x0f
 200 #define BCSR13_nUSBEN   0x08 /* 1 - Disable, 0 - Enable                 */
 201 #define BCSR13_USBSPEED 0x04 /* 1 - Full, 0 - Low                       */
 202 #define BCSR13_USBMODE  0x02 /* 1 - Host, 0 - Function                  */
 203 #define BCSR13_nUSBVCC  0x01 /* 1 - gets VBUS, 0 - supplies VBUS        */
 204
 205         clrsetbits_8(&bcsr[13], BCSR13_USBMASK, BCSR13_USBSPEED);
 206
 207         mode = of_get_property(np, "mode", NULL);
 208         if (mode && !strcmp(mode, "peripheral")) {
 209                 setbits8(&bcsr[13], BCSR13_nUSBVCC);
 210                 qe_usb_clock_set(QE_CLK21, 48000000);
 211         } else {
 212                 setbits8(&bcsr[13], BCSR13_USBMODE);
 213                 /*
 214                  * The BCSR GPIOs are used to control power and
 215                  * speed of the USB transceiver. This is needed for
 216                  * the USB Host only.
 217                  */
 218                 simple_gpiochip_init("fsl,mpc8360mds-bcsr-gpio");
 219         }
 220
 221         of_node_put(np);
 222 err:
 223         iounmap(bcsr);
 224         return ret;
 225 }
 226 machine_arch_initcall(mpc836x_mds, mpc836x_usb_cfg);
 227 #endif /* CONFIG_QE_USB */
 228
 229 static void __init mpc836x_mds_init_IRQ(void)
 230 {
 231         struct device_node *np;
 232
 233         np = of_find_node_by_type(NULL, "ipic");
 234         if (!np)
 235                 return;
 236
 237         ipic_init(np, 0);
 238
 239         /* Initialize the default interrupt mapping priorities,
 240          * in case the boot rom changed something on us.
 241          */
 242         ipic_set_default_priority();
 243         of_node_put(np);
 244
 245 #ifdef CONFIG_QUICC_ENGINE
 246         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
 247         if (!np) {
 248                 np = of_find_node_by_type(NULL, "qeic");
 249                 if (!np)
 250                         return;
 251         }
 252         qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 253         of_node_put(np);
 254 #endif                          /* CONFIG_QUICC_ENGINE */
 255 }
 256
 257 /*
 258  * Called very early, MMU is off, device-tree isn't unflattened
 259  */
 260 static int __init mpc836x_mds_probe(void)
 261 {
 262         unsigned long root = of_get_flat_dt_root();
 263
 264         return of_flat_dt_is_compatible(root, "MPC836xMDS");
 265 }
 266
 267 define_machine(mpc836x_mds) {
 268         .name           = "MPC836x MDS",
 269         .probe          = mpc836x_mds_probe,
 270         .setup_arch     = mpc836x_mds_setup_arch,
 271         .init_IRQ       = mpc836x_mds_init_IRQ,
 272         .get_irq        = ipic_get_irq,
 273         .restart        = mpc83xx_restart,
 274         .time_init      = mpc83xx_time_init,
 275         .calibrate_decr = generic_calibrate_decr,
 276         .progress       = udbg_progress,
 277 };