kernel/arch/powerpc/platforms/8xx/tqm8xx_setup.c

   1 /*
   2  * Platform setup for the MPC8xx based boards from TQM.
   3  *
   4  * Heiko Schocher <hs@denx.de>
   5  * Copyright 2010 DENX Software Engineering GmbH
   6  *
   7  * based on:
   8  * Vitaly Bordug <vbordug@ru.mvista.com>
   9  *
  10  * Copyright 2005 MontaVista Software Inc.
  11  *
  12  * Heavily modified by Scott Wood <scottwood@freescale.com>
  13  * Copyright 2007 Freescale Semiconductor, Inc.
  14  *
  15  * This file is licensed under the terms of the GNU General Public License
  16  * version 2. This program is licensed "as is" without any warranty of any
  17  * kind, whether express or implied.
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/param.h>
  22 #include <linux/string.h>
  23 #include <linux/ioport.h>
  24 #include <linux/device.h>
  25 #include <linux/delay.h>
  26
  27 #include <linux/fs_enet_pd.h>
  28 #include <linux/fs_uart_pd.h>
  29 #include <linux/fsl_devices.h>
  30 #include <linux/mii.h>
  31 #include <linux/of_fdt.h>
  32 #include <linux/of_platform.h>
  33
  34 #include <asm/delay.h>
  35 #include <asm/io.h>
  36 #include <asm/machdep.h>
  37 #include <asm/page.h>
  38 #include <asm/processor.h>
  39 #include <asm/time.h>
  40 #include <asm/8xx_immap.h>
  41 #include <asm/cpm1.h>
  42 #include <asm/fs_pd.h>
  43 #include <asm/udbg.h>
  44
  45 #include "mpc8xx.h"
  46
  47 struct cpm_pin {
  48         int port, pin, flags;
  49 };
  50
  51 static struct cpm_pin tqm8xx_pins[] __initdata = {
  52         /* SMC1 */
  53         {CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
  54         {CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
  55
  56         /* SCC1 */
  57         {CPM_PORTA, 5, CPM_PIN_INPUT}, /* CLK1 */
  58         {CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
  59         {CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
  60         {CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
  61         {CPM_PORTC, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
  62         {CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
  63         {CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO},
  64 };
  65
  66 static struct cpm_pin tqm8xx_fec_pins[] __initdata = {
  67         /* MII */
  68         {CPM_PORTD, 3, CPM_PIN_OUTPUT},
  69         {CPM_PORTD, 4, CPM_PIN_OUTPUT},
  70         {CPM_PORTD, 5, CPM_PIN_OUTPUT},
  71         {CPM_PORTD, 6, CPM_PIN_OUTPUT},
  72         {CPM_PORTD, 7, CPM_PIN_OUTPUT},
  73         {CPM_PORTD, 8, CPM_PIN_OUTPUT},
  74         {CPM_PORTD, 9, CPM_PIN_OUTPUT},
  75         {CPM_PORTD, 10, CPM_PIN_OUTPUT},
  76         {CPM_PORTD, 11, CPM_PIN_OUTPUT},
  77         {CPM_PORTD, 12, CPM_PIN_OUTPUT},
  78         {CPM_PORTD, 13, CPM_PIN_OUTPUT},
  79         {CPM_PORTD, 14, CPM_PIN_OUTPUT},
  80         {CPM_PORTD, 15, CPM_PIN_OUTPUT},
  81 };
  82
  83 static void __init init_pins(int n, struct cpm_pin *pin)
  84 {
  85         int i;
  86
  87         for (i = 0; i < n; i++) {
  88                 cpm1_set_pin(pin->port, pin->pin, pin->flags);
  89                 pin++;
  90         }
  91 }
  92
  93 static void __init init_ioports(void)
  94 {
  95         struct device_node *dnode;
  96         struct property *prop;
  97         int     len;
  98
  99         init_pins(ARRAY_SIZE(tqm8xx_pins), &tqm8xx_pins[0]);
 100
 101         cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
 102
 103         dnode = of_find_node_by_name(NULL, "aliases");
 104         if (dnode == NULL)
 105                 return;
 106         prop = of_find_property(dnode, "ethernet1", &len);
 107         if (prop == NULL)
 108                 return;
 109
 110         /* init FEC pins */
 111         init_pins(ARRAY_SIZE(tqm8xx_fec_pins), &tqm8xx_fec_pins[0]);
 112 }
 113
 114 static void __init tqm8xx_setup_arch(void)
 115 {
 116         cpm_reset();
 117         init_ioports();
 118 }
 119
 120 static int __init tqm8xx_probe(void)
 121 {
 122         unsigned long node = of_get_flat_dt_root();
 123
 124         return of_flat_dt_is_compatible(node, "tqc,tqm8xx");
 125 }
 126
 127 static const struct of_device_id of_bus_ids[] __initconst = {
 128         { .name = "soc", },
 129         { .name = "cpm", },
 130         { .name = "localbus", },
 131         { .compatible = "simple-bus" },
 132         {},
 133 };
 134
 135 static int __init declare_of_platform_devices(void)
 136 {
 137         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 138
 139         return 0;
 140 }
 141 machine_device_initcall(tqm8xx, declare_of_platform_devices);
 142
 143 define_machine(tqm8xx) {
 144         .name                   = "TQM8xx",
 145         .probe                  = tqm8xx_probe,
 146         .setup_arch             = tqm8xx_setup_arch,
 147         .init_IRQ               = mpc8xx_pics_init,
 148         .get_irq                = mpc8xx_get_irq,
 149         .restart                = mpc8xx_restart,
 150         .calibrate_decr         = mpc8xx_calibrate_decr,
 151         .set_rtc_time           = mpc8xx_set_rtc_time,
 152         .get_rtc_time           = mpc8xx_get_rtc_time,
 153         .progress               = udbg_progress,
 154 };