arch/powerpc/platforms/82xx/pq2fads.c

   1 /*
   2  * PQ2FADS board support
   3  *
   4  * Copyright 2007 Freescale Semiconductor, Inc.
   5  * Author: Scott Wood <scottwood@freescale.com>
   6  *
   7  * Loosely based on mp82xx ADS support 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 version 2 as published
  12  * by the Free Software Foundation.
  13  */
  14
  15 #include <linux/init.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/fsl_devices.h>
  18
  19 #include <asm/io.h>
  20 #include <asm/cpm2.h>
  21 #include <asm/udbg.h>
  22 #include <asm/machdep.h>
  23 #include <asm/of_platform.h>
  24 #include <asm/time.h>
  25
  26 #include <sysdev/fsl_soc.h>
  27 #include <sysdev/cpm2_pic.h>
  28
  29 #include "pq2ads.h"
  30 #include "pq2.h"
  31
  32 static void __init pq2fads_pic_init(void)
  33 {
  34         struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  35         if (!np) {
  36                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  37                 return;
  38         }
  39
  40         cpm2_pic_init(np);
  41         of_node_put(np);
  42
  43         /* Initialize stuff for the 82xx CPLD IC and install demux  */
  44         pq2ads_pci_init_irq();
  45 }
  46
  47 struct cpm_pin {
  48         int port, pin, flags;
  49 };
  50
  51 static struct cpm_pin pq2fads_pins[] = {
  52         /* SCC1 */
  53         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  54         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  55
  56         /* SCC2 */
  57         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  58         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  59
  60         /* FCC2 */
  61         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  62         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  63         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  64         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  65         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  66         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  67         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  68         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  69         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  70         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  71         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  72         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  73         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  74         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  75         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  76         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  77
  78         /* FCC3 */
  79         {1, 4, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  80         {1, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  81         {1, 6, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  82         {1, 7, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  83         {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  84         {1, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  85         {1, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  86         {1, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  87         {1, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  88         {1, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  89         {1, 14, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  90         {1, 15, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  91         {1, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  92         {1, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93         {2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  94         {2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  95 };
  96
  97 static void __init init_ioports(void)
  98 {
  99         int i;
 100
 101         for (i = 0; i < ARRAY_SIZE(pq2fads_pins); i++) {
 102                 struct cpm_pin *pin = &pq2fads_pins[i];
 103                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 104         }
 105
 106         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 107         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 108         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 109         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 110         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 111         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 112         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK15, CPM_CLK_RX);
 113         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK16, CPM_CLK_TX);
 114 }
 115
 116 static void __init pq2fads_setup_arch(void)
 117 {
 118         struct device_node *np;
 119         __be32 __iomem *bcsr;
 120
 121         if (ppc_md.progress)
 122                 ppc_md.progress("pq2fads_setup_arch()", 0);
 123
 124         cpm2_reset();
 125
 126         np = of_find_compatible_node(NULL, NULL, "fsl,pq2fads-bcsr");
 127         if (!np) {
 128                 printk(KERN_ERR "No fsl,pq2fads-bcsr in device tree\n");
 129                 return;
 130         }
 131
 132         bcsr = of_iomap(np, 0);
 133         if (!bcsr) {
 134                 printk(KERN_ERR "Cannot map BCSR registers\n");
 135                 return;
 136         }
 137
 138         of_node_put(np);
 139
 140         /* Enable the serial and ethernet ports */
 141
 142         clrbits32(&bcsr[1], BCSR1_RS232_EN1 | BCSR1_RS232_EN2 | BCSR1_FETHIEN);
 143         setbits32(&bcsr[1], BCSR1_FETH_RST);
 144
 145         clrbits32(&bcsr[3], BCSR3_FETHIEN2);
 146         setbits32(&bcsr[3], BCSR3_FETH2_RST);
 147
 148         iounmap(bcsr);
 149
 150         init_ioports();
 151
 152         /* Enable external IRQs */
 153         clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_siumcr, 0x0c000000);
 154
 155         pq2_init_pci();
 156
 157         if (ppc_md.progress)
 158                 ppc_md.progress("pq2fads_setup_arch(), finish", 0);
 159 }
 160
 161 /*
 162  * Called very early, device-tree isn't unflattened
 163  */
 164 static int __init pq2fads_probe(void)
 165 {
 166         unsigned long root = of_get_flat_dt_root();
 167         return of_flat_dt_is_compatible(root, "fsl,pq2fads");
 168 }
 169
 170 static struct of_device_id __initdata of_bus_ids[] = {
 171         { .name = "soc", },
 172         { .name = "cpm", },
 173         { .name = "localbus", },
 174         {},
 175 };
 176
 177 static int __init declare_of_platform_devices(void)
 178 {
 179         if (!machine_is(pq2fads))
 180                 return 0;
 181
 182         /* Publish the QE devices */
 183         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 184         return 0;
 185 }
 186 device_initcall(declare_of_platform_devices);
 187
 188 define_machine(pq2fads)
 189 {
 190         .name = "Freescale PQ2FADS",
 191         .probe = pq2fads_probe,
 192         .setup_arch = pq2fads_setup_arch,
 193         .init_IRQ = pq2fads_pic_init,
 194         .get_irq = cpm2_get_irq,
 195         .calibrate_decr = generic_calibrate_decr,
 196         .restart = pq2_restart,
 197         .progress = udbg_progress,
 198 };