arch/powerpc/platforms/82xx/mpc8272_ads.c

   1 /*
   2  * MPC8272 ADS board support
   3  *
   4  * Copyright 2007 Freescale Semiconductor, Inc.
   5  * Author: Scott Wood <scottwood@freescale.com>
   6  *
   7  * Based on code by Vitaly Bordug <vbordug@ru.mvista.com>
   8  * Copyright (c) 2006 MontaVista Software, Inc.
   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 #include <linux/io.h>
  21
  22 #include <asm/cpm2.h>
  23 #include <asm/udbg.h>
  24 #include <asm/machdep.h>
  25 #include <asm/time.h>
  26
  27 #include <platforms/82xx/pq2.h>
  28
  29 #include <sysdev/fsl_soc.h>
  30 #include <sysdev/cpm2_pic.h>
  31
  32 #include "pq2.h"
  33
  34 static void __init mpc8272_ads_pic_init(void)
  35 {
  36         struct device_node *np = of_find_compatible_node(NULL, NULL,
  37                                                          "fsl,cpm2-pic");
  38         if (!np) {
  39                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  40                 return;
  41         }
  42
  43         cpm2_pic_init(np);
  44         of_node_put(np);
  45
  46         /* Initialize stuff for the 82xx CPLD IC and install demux  */
  47         pq2ads_pci_init_irq();
  48 }
  49
  50 struct cpm_pin {
  51         int port, pin, flags;
  52 };
  53
  54 static struct cpm_pin mpc8272_ads_pins[] = {
  55         /* SCC1 */
  56         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  57         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  58
  59         /* SCC4 */
  60         {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  61         {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  62
  63         /* FCC1 */
  64         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  65         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  66         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  67         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  68         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  69         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  70         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  71         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  72         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  73         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  74         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  75         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  76         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  77         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  78         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  79         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  80
  81         /* FCC2 */
  82         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  83         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  84         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  85         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  86         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  87         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  88         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  89         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  90         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  91         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  92         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  94         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  95         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  96         {2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  97         {2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  98
  99         /* I2C */
 100         {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 101         {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 102 };
 103
 104 static void __init init_ioports(void)
 105 {
 106         int i;
 107
 108         for (i = 0; i < ARRAY_SIZE(mpc8272_ads_pins); i++) {
 109                 struct cpm_pin *pin = &mpc8272_ads_pins[i];
 110                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 111         }
 112
 113         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 114         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 115         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_RX);
 116         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_TX);
 117         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
 118         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 119         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK15, CPM_CLK_RX);
 120         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK16, CPM_CLK_TX);
 121 }
 122
 123 static void __init mpc8272_ads_setup_arch(void)
 124 {
 125         struct device_node *np;
 126         __be32 __iomem *bcsr;
 127
 128         if (ppc_md.progress)
 129                 ppc_md.progress("mpc8272_ads_setup_arch()", 0);
 130
 131         cpm2_reset();
 132
 133         np = of_find_compatible_node(NULL, NULL, "fsl,mpc8272ads-bcsr");
 134         if (!np) {
 135                 printk(KERN_ERR "No bcsr in device tree\n");
 136                 return;
 137         }
 138
 139         bcsr = of_iomap(np, 0);
 140         of_node_put(np);
 141         if (!bcsr) {
 142                 printk(KERN_ERR "Cannot map BCSR registers\n");
 143                 return;
 144         }
 145
 146 #define BCSR1_FETHIEN           0x08000000
 147 #define BCSR1_FETH_RST          0x04000000
 148 #define BCSR1_RS232_EN1         0x02000000
 149 #define BCSR1_RS232_EN2         0x01000000
 150 #define BCSR3_FETHIEN2          0x10000000
 151 #define BCSR3_FETH2_RST         0x08000000
 152
 153         clrbits32(&bcsr[1], BCSR1_RS232_EN1 | BCSR1_RS232_EN2 | BCSR1_FETHIEN);
 154         setbits32(&bcsr[1], BCSR1_FETH_RST);
 155
 156         clrbits32(&bcsr[3], BCSR3_FETHIEN2);
 157         setbits32(&bcsr[3], BCSR3_FETH2_RST);
 158
 159         iounmap(bcsr);
 160
 161         init_ioports();
 162         pq2_init_pci();
 163
 164         if (ppc_md.progress)
 165                 ppc_md.progress("mpc8272_ads_setup_arch(), finish", 0);
 166 }
 167
 168 static struct of_device_id __initdata of_bus_ids[] = {
 169         { .name = "soc", },
 170         { .name = "cpm", },
 171         { .name = "localbus", },
 172         {},
 173 };
 174
 175 static int __init declare_of_platform_devices(void)
 176 {
 177         /* Publish the QE devices */
 178         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 179         return 0;
 180 }
 181 machine_device_initcall(mpc8272_ads, declare_of_platform_devices);
 182
 183 /*
 184  * Called very early, device-tree isn't unflattened
 185  */
 186 static int __init mpc8272_ads_probe(void)
 187 {
 188         unsigned long root = of_get_flat_dt_root();
 189         return of_flat_dt_is_compatible(root, "fsl,mpc8272ads");
 190 }
 191
 192 define_machine(mpc8272_ads)
 193 {
 194         .name = "Freescale MPC8272 ADS",
 195         .probe = mpc8272_ads_probe,
 196         .setup_arch = mpc8272_ads_setup_arch,
 197         .init_IRQ = mpc8272_ads_pic_init,
 198         .get_irq = cpm2_get_irq,
 199         .calibrate_decr = generic_calibrate_decr,
 200         .restart = pq2_restart,
 201         .progress = udbg_progress,
 202 };