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

   1 /*
   2  * Keymile mgcoge support
   3  * Copyright 2008 DENX Software Engineering GmbH
   4  * Author: Heiko Schocher <hs@denx.de>
   5  *
   6  * based on code from:
   7  * Copyright 2007 Freescale Semiconductor, Inc.
   8  * Author: Scott Wood <scottwood@freescale.com>
   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
  21 #include <asm/io.h>
  22 #include <asm/cpm2.h>
  23 #include <asm/udbg.h>
  24 #include <asm/machdep.h>
  25 #include <asm/time.h>
  26 #include <asm/mpc8260.h>
  27 #include <asm/prom.h>
  28
  29 #include <sysdev/fsl_soc.h>
  30 #include <sysdev/cpm2_pic.h>
  31
  32 #include "pq2.h"
  33
  34 static void __init mgcoge_pic_init(void)
  35 {
  36         struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
  37         if (!np) {
  38                 printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
  39                 return;
  40         }
  41
  42         cpm2_pic_init(np);
  43         of_node_put(np);
  44 }
  45
  46 struct cpm_pin {
  47         int port, pin, flags;
  48 };
  49
  50 static __initdata struct cpm_pin mgcoge_pins[] = {
  51
  52         /* SMC2 */
  53         {0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  54         {0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  55
  56         /* SCC4 */
  57         {2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  58         {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  59         {2,  9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  60         {2,  8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  61         {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  62         {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  63
  64         /* FCC1 */
  65         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  66         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  67         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  68         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  69         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  70         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  71         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  72         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  73         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  74         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  75         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  76         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  77         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  78         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
  79
  80         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  81         {2, 23, 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
  99         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 100         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 101
 102         /* MDC */
 103         {0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO},
 104
 105 #if defined(CONFIG_I2C_CPM)
 106         /* I2C */
 107         {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 108         {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
 109 #endif
 110 };
 111
 112 static void __init init_ioports(void)
 113 {
 114         int i;
 115
 116         for (i = 0; i < ARRAY_SIZE(mgcoge_pins); i++) {
 117                 const struct cpm_pin *pin = &mgcoge_pins[i];
 118                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 119         }
 120
 121         cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8);
 122         cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX);
 123         cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX);
 124         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX);
 125         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9,  CPM_CLK_TX);
 126         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 127         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 128 }
 129
 130 static void __init mgcoge_setup_arch(void)
 131 {
 132         if (ppc_md.progress)
 133                 ppc_md.progress("mgcoge_setup_arch()", 0);
 134
 135         cpm2_reset();
 136
 137         /* When this is set, snooping CPM DMA from RAM causes
 138          * machine checks.  See erratum SIU18.
 139          */
 140         clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
 141
 142         init_ioports();
 143
 144         if (ppc_md.progress)
 145                 ppc_md.progress("mgcoge_setup_arch(), finish", 0);
 146 }
 147
 148 static  __initdata struct of_device_id of_bus_ids[] = {
 149         { .compatible = "simple-bus", },
 150         {},
 151 };
 152
 153 static int __init declare_of_platform_devices(void)
 154 {
 155         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 156
 157         return 0;
 158 }
 159 machine_device_initcall(mgcoge, declare_of_platform_devices);
 160
 161 /*
 162  * Called very early, device-tree isn't unflattened
 163  */
 164 static int __init mgcoge_probe(void)
 165 {
 166         unsigned long root = of_get_flat_dt_root();
 167         return of_flat_dt_is_compatible(root, "keymile,mgcoge");
 168 }
 169
 170 define_machine(mgcoge)
 171 {
 172         .name = "Keymile MGCOGE",
 173         .probe = mgcoge_probe,
 174         .setup_arch = mgcoge_setup_arch,
 175         .init_IRQ = mgcoge_pic_init,
 176         .get_irq = cpm2_get_irq,
 177         .calibrate_decr = generic_calibrate_decr,
 178         .restart = pq2_restart,
 179         .progress = udbg_progress,
 180 };