LXR linux/arch/powerpc/platforms/8xx/ep88xc.c

   1/*
   2 * Platform setup for the Embedded Planet EP88xC board
   3 *
   4 * Author: Scott Wood <scottwood@freescale.com>
   5 * Copyright 2007 Freescale Semiconductor, Inc.
   6 *
   7 * This file is licensed under the terms of the GNU General Public License
   8 * version 2. This program is licensed "as is" without any warranty of any
   9 * kind, whether express or implied.
  10 */
  11
  12#include <linux/init.h>
  13#include <linux/of_platform.h>
  14
  15#include <asm/machdep.h>
  16#include <asm/io.h>
  17#include <asm/udbg.h>
  18#include <asm/commproc.h>
  19
  20#include <sysdev/commproc.h>
  21
  22struct cpm_pin {
  23        int port, pin, flags;
  24};
  25
  26static struct cpm_pin ep88xc_pins[] = {
  27        /* SMC1 */
  28        {1, 24, CPM_PIN_INPUT}, /* RX */
  29        {1, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
  30
  31        /* SCC2 */
  32        {0, 12, CPM_PIN_INPUT}, /* TX */
  33        {0, 13, CPM_PIN_INPUT}, /* RX */
  34        {2, 8, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CD */
  35        {2, 9, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CTS */
  36        {2, 14, CPM_PIN_INPUT}, /* RTS */
  37
  38        /* MII1 */
  39        {0, 0, CPM_PIN_INPUT},
  40        {0, 1, CPM_PIN_INPUT},
  41        {0, 2, CPM_PIN_INPUT},
  42        {0, 3, CPM_PIN_INPUT},
  43        {0, 4, CPM_PIN_OUTPUT},
  44        {0, 10, CPM_PIN_OUTPUT},
  45        {0, 11, CPM_PIN_OUTPUT},
  46        {1, 19, CPM_PIN_INPUT},
  47        {1, 31, CPM_PIN_INPUT},
  48        {2, 12, CPM_PIN_INPUT},
  49        {2, 13, CPM_PIN_INPUT},
  50        {3, 8, CPM_PIN_INPUT},
  51        {4, 30, CPM_PIN_OUTPUT},
  52        {4, 31, CPM_PIN_OUTPUT},
  53
  54        /* MII2 */
  55        {4, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  56        {4, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  57        {4, 16, CPM_PIN_OUTPUT},
  58        {4, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  59        {4, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  60        {4, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  61        {4, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  62        {4, 21, CPM_PIN_OUTPUT},
  63        {4, 22, CPM_PIN_OUTPUT},
  64        {4, 23, CPM_PIN_OUTPUT},
  65        {4, 24, CPM_PIN_OUTPUT},
  66        {4, 25, CPM_PIN_OUTPUT},
  67        {4, 26, CPM_PIN_OUTPUT},
  68        {4, 27, CPM_PIN_OUTPUT},
  69        {4, 28, CPM_PIN_OUTPUT},
  70        {4, 29, CPM_PIN_OUTPUT},
  71
  72        /* USB */
  73        {0, 6, CPM_PIN_INPUT},  /* CLK2 */
  74        {0, 14, CPM_PIN_INPUT}, /* USBOE */
  75        {0, 15, CPM_PIN_INPUT}, /* USBRXD */
  76        {2, 6, CPM_PIN_OUTPUT}, /* USBTXN */
  77        {2, 7, CPM_PIN_OUTPUT}, /* USBTXP */
  78        {2, 10, CPM_PIN_INPUT}, /* USBRXN */
  79        {2, 11, CPM_PIN_INPUT}, /* USBRXP */
  80
  81        /* Misc */
  82        {1, 26, CPM_PIN_INPUT}, /* BRGO2 */
  83        {1, 27, CPM_PIN_INPUT}, /* BRGO1 */
  84};
  85
  86static void __init init_ioports(void)
  87{
  88        int i;
  89
  90        for (i = 0; i < ARRAY_SIZE(ep88xc_pins); i++) {
  91                struct cpm_pin *pin = &ep88xc_pins[i];
  92                cpm1_set_pin(pin->port, pin->pin, pin->flags);
  93        }
  94
  95        cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
  96        cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_TX); /* USB */
  97        cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
  98        cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
  99        cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 100}
 101
 102static u8 __iomem *ep88xc_bcsr;
 103
 104#define BCSR7_SCC2_ENABLE 0x10
 105
 106#define BCSR8_PHY1_ENABLE 0x80
 107#define BCSR8_PHY1_POWER  0x40
 108#define BCSR8_PHY2_ENABLE 0x20
 109#define BCSR8_PHY2_POWER  0x10
 110
 111#define BCSR9_USB_ENABLE  0x80
 112#define BCSR9_USB_POWER   0x40
 113#define BCSR9_USB_HOST    0x20
 114#define BCSR9_USB_FULL_SPEED_TARGET 0x10
 115
 116static void __init ep88xc_setup_arch(void)
 117{
 118        struct device_node *np;
 119
 120        cpm_reset();
 121        init_ioports();
 122
 123        np = of_find_compatible_node(NULL, NULL, "fsl,ep88xc-bcsr");
 124        if (!np) {
 125                printk(KERN_CRIT "Could not find fsl,ep88xc-bcsr node\n");
 126                return;
 127        }
 128
 129        ep88xc_bcsr = of_iomap(np, 0);
 130        of_node_put(np);
 131
 132        if (!ep88xc_bcsr) {
 133                printk(KERN_CRIT "Could not remap BCSR\n");
 134                return;
 135        }
 136
 137        setbits8(&ep88xc_bcsr[7], BCSR7_SCC2_ENABLE);
 138        setbits8(&ep88xc_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
 139                                  BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
 140}
 141
 142static int __init ep88xc_probe(void)
 143{
 144        unsigned long root = of_get_flat_dt_root();
 145        return of_flat_dt_is_compatible(root, "fsl,ep88xc");
 146}
 147
 148static struct of_device_id __initdata of_bus_ids[] = {
 149        { .name = "soc", },
 150        { .name = "cpm", },
 151        { .name = "localbus", },
 152        {},
 153};
 154
 155static int __init declare_of_platform_devices(void)
 156{
 157        /* Publish the QE devices */
 158        if (machine_is(ep88xc))
 159                of_platform_bus_probe(NULL, of_bus_ids, NULL);
 160
 161        return 0;
 162}
 163device_initcall(declare_of_platform_devices);
 164
 165define_machine(ep88xc) {
 166        .name = "Embedded Planet EP88xC",
 167        .probe = ep88xc_probe,
 168        .setup_arch = ep88xc_setup_arch,
 169        .init_IRQ = m8xx_pic_init,
 170        .get_irq        = mpc8xx_get_irq,
 171        .restart = mpc8xx_restart,
 172        .calibrate_decr = mpc8xx_calibrate_decr,
 173        .set_rtc_time = mpc8xx_set_rtc_time,
 174        .get_rtc_time = mpc8xx_get_rtc_time,
 175        .progress = udbg_progress,
 176};
 177