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_address.h>
  20 #include <linux/of_fdt.h>
  21 #include <linux/of_platform.h>
  22 #include <linux/io.h>
  23
  24 #include <asm/cpm2.h>
  25 #include <asm/udbg.h>
  26 #include <asm/machdep.h>
  27 #include <asm/time.h>
  28
  29 #include <platforms/82xx/pq2.h>
  30
  31 #include <sysdev/fsl_soc.h>
  32 #include <sysdev/cpm2_pic.h>
  33
  34 #include "pq2.h"
  35
  36 static void __init mpc8272_ads_pic_init(void)
  37 {
  38         struct device_node *np = of_find_compatible_node(NULL, NULL,
  39                                                          "fsl,cpm2-pic");
  40         if (!np) {
  41                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  42                 return;
  43         }
  44
  45         cpm2_pic_init(np);
  46         of_node_put(np);
  47
  48         /* Initialize stuff for the 82xx CPLD IC and install demux  */
  49         pq2ads_pci_init_irq();
  50 }
  51
  52 struct cpm_pin {
  53         int port, pin, flags;
  54 };
  55
  56 static struct cpm_pin mpc8272_ads_pins[] = {
  57         /* SCC1 */
  58         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  59         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  60
  61         /* SCC4 */
  62         {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  63         {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  64
  65         /* FCC1 */
  66         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  67         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  68         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  69         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  70         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  71         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  72         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  73         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  74         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  75         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  76         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  77         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  78         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  79         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  80         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  81         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  82
  83         /* FCC2 */
  84         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  85         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  86         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  87         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  88         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  89         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  90         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  91         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  92         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  94         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  95         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  96         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  97         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  98         {2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  99         {2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 100
 101         /* I2C */
 102         {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 103         {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 104
 105         /* USB */
 106         {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 107         {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 108         {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 109         {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 110         {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 111         {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 112         {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 113 };
 114
 115 static void __init init_ioports(void)
 116 {
 117         int i;
 118
 119         for (i = 0; i < ARRAY_SIZE(mpc8272_ads_pins); i++) {
 120                 struct cpm_pin *pin = &mpc8272_ads_pins[i];
 121                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 122         }
 123
 124         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 125         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 126         cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_RX);
 127         cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX);
 128         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_RX);
 129         cpm2_clk_setup(CPM_CLK_SCC4, CPM_BRG4, CPM_CLK_TX);
 130         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
 131         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 132         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK15, CPM_CLK_RX);
 133         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK16, CPM_CLK_TX);
 134 }
 135
 136 static void __init mpc8272_ads_setup_arch(void)
 137 {
 138         struct device_node *np;
 139         __be32 __iomem *bcsr;
 140
 141         if (ppc_md.progress)
 142                 ppc_md.progress("mpc8272_ads_setup_arch()", 0);
 143
 144         cpm2_reset();
 145
 146         np = of_find_compatible_node(NULL, NULL, "fsl,mpc8272ads-bcsr");
 147         if (!np) {
 148                 printk(KERN_ERR "No bcsr in device tree\n");
 149                 return;
 150         }
 151
 152         bcsr = of_iomap(np, 0);
 153         of_node_put(np);
 154         if (!bcsr) {
 155                 printk(KERN_ERR "Cannot map BCSR registers\n");
 156                 return;
 157         }
 158
 159 #define BCSR1_FETHIEN           0x08000000
 160 #define BCSR1_FETH_RST          0x04000000
 161 #define BCSR1_RS232_EN1         0x02000000
 162 #define BCSR1_RS232_EN2         0x01000000
 163 #define BCSR3_USB_nEN           0x80000000
 164 #define BCSR3_FETHIEN2          0x10000000
 165 #define BCSR3_FETH2_RST         0x08000000
 166
 167         clrbits32(&bcsr[1], BCSR1_RS232_EN1 | BCSR1_RS232_EN2 | BCSR1_FETHIEN);
 168         setbits32(&bcsr[1], BCSR1_FETH_RST);
 169
 170         clrbits32(&bcsr[3], BCSR3_FETHIEN2);
 171         setbits32(&bcsr[3], BCSR3_FETH2_RST);
 172
 173         clrbits32(&bcsr[3], BCSR3_USB_nEN);
 174
 175         iounmap(bcsr);
 176
 177         init_ioports();
 178         pq2_init_pci();
 179
 180         if (ppc_md.progress)
 181                 ppc_md.progress("mpc8272_ads_setup_arch(), finish", 0);
 182 }
 183
 184 static const struct of_device_id of_bus_ids[] __initconst = {
 185         { .name = "soc", },
 186         { .name = "cpm", },
 187         { .name = "localbus", },
 188         {},
 189 };
 190
 191 static int __init declare_of_platform_devices(void)
 192 {
 193         /* Publish the QE devices */
 194         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 195         return 0;
 196 }
 197 machine_device_initcall(mpc8272_ads, declare_of_platform_devices);
 198
 199 /*
 200  * Called very early, device-tree isn't unflattened
 201  */
 202 static int __init mpc8272_ads_probe(void)
 203 {
 204         unsigned long root = of_get_flat_dt_root();
 205         return of_flat_dt_is_compatible(root, "fsl,mpc8272ads");
 206 }
 207
 208 define_machine(mpc8272_ads)
 209 {
 210         .name = "Freescale MPC8272 ADS",
 211         .probe = mpc8272_ads_probe,
 212         .setup_arch = mpc8272_ads_setup_arch,
 213         .init_IRQ = mpc8272_ads_pic_init,
 214         .get_irq = cpm2_get_irq,
 215         .calibrate_decr = generic_calibrate_decr,
 216         .restart = pq2_restart,
 217         .progress = udbg_progress,
 218 };