arch/xtensa/platforms/xt2000/setup.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * arch/xtensa/platforms/xt2000/setup.c
   4  *
   5  * Platform specific functions for the XT2000 board.
   6  *
   7  * Authors:     Chris Zankel <chris@zankel.net>
   8  *              Joe Taylor <joe@tensilica.com>
   9  *
  10  * Copyright 2001 - 2004 Tensilica Inc.
  11  */
  12 #include <linux/stddef.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/errno.h>
  16 #include <linux/reboot.h>
  17 #include <linux/kdev_t.h>
  18 #include <linux/types.h>
  19 #include <linux/major.h>
  20 #include <linux/console.h>
  21 #include <linux/delay.h>
  22 #include <linux/stringify.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/serial.h>
  25 #include <linux/serial_8250.h>
  26
  27 #include <asm/processor.h>
  28 #include <asm/platform.h>
  29 #include <asm/bootparam.h>
  30 #include <platform/hardware.h>
  31 #include <platform/serial.h>
  32
  33 /* Assumes s points to an 8-chr string.  No checking for NULL. */
  34
  35 static void led_print (int f, char *s)
  36 {
  37         unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
  38         int i;
  39         for (i = f; i < 8; i++)
  40                 if ((*led_addr++ = *s++) == 0)
  41                     break;
  42 }
  43
  44 void platform_halt(void)
  45 {
  46         led_print (0, "  HALT  ");
  47         local_irq_disable();
  48         while (1);
  49 }
  50
  51 void platform_power_off(void)
  52 {
  53         led_print (0, "POWEROFF");
  54         local_irq_disable();
  55         while (1);
  56 }
  57
  58 void platform_restart(void)
  59 {
  60         /* Flush and reset the mmu, simulate a processor reset, and
  61          * jump to the reset vector. */
  62         cpu_reset();
  63         /* control never gets here */
  64 }
  65
  66 void __init platform_setup(char** cmdline)
  67 {
  68         led_print (0, "LINUX   ");
  69 }
  70
  71 /* early initialization */
  72
  73 void __init platform_init(bp_tag_t *first)
  74 {
  75 }
  76
  77 /* Heartbeat. Let the LED blink. */
  78
  79 void platform_heartbeat(void)
  80 {
  81         static int i, t;
  82
  83         if (--t < 0)
  84         {
  85                 t = 59;
  86                 led_print(7, i ? ".": " ");
  87                 i ^= 1;
  88         }
  89 }
  90
  91 //#define RS_TABLE_SIZE 2
  92
  93 #define _SERIAL_PORT(_base,_irq)                                        \
  94 {                                                                       \
  95         .mapbase        = (_base),                                      \
  96         .membase        = (void*)(_base),                               \
  97         .irq            = (_irq),                                       \
  98         .uartclk        = DUART16552_XTAL_FREQ,                         \
  99         .iotype         = UPIO_MEM,                                     \
 100         .flags          = UPF_BOOT_AUTOCONF,                            \
 101         .regshift       = 2,                                            \
 102 }
 103
 104 static struct plat_serial8250_port xt2000_serial_data[] = {
 105 #if XCHAL_HAVE_BE
 106         _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
 107         _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
 108 #else
 109         _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
 110         _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
 111 #endif
 112         { }
 113 };
 114
 115 static struct platform_device xt2000_serial8250_device = {
 116         .name           = "serial8250",
 117         .id             = PLAT8250_DEV_PLATFORM,
 118         .dev            = {
 119             .platform_data = xt2000_serial_data,
 120         },
 121 };
 122
 123 static struct resource xt2000_sonic_res[] = {
 124         {
 125                 .start = SONIC83934_ADDR,
 126                 .end   = SONIC83934_ADDR + 0xff,
 127                 .flags = IORESOURCE_MEM,
 128         },
 129         {
 130                 .start = SONIC83934_INTNUM,
 131                 .end = SONIC83934_INTNUM,
 132                 .flags = IORESOURCE_IRQ,
 133         },
 134 };
 135
 136 static struct platform_device xt2000_sonic_device = {
 137         .name           = "xtsonic",
 138         .num_resources  = ARRAY_SIZE(xt2000_sonic_res),
 139         .resource               = xt2000_sonic_res,
 140 };
 141
 142 static int __init xt2000_setup_devinit(void)
 143 {
 144         platform_device_register(&xt2000_serial8250_device);
 145         platform_device_register(&xt2000_sonic_device);
 146
 147         return 0;
 148 }
 149
 150 device_initcall(xt2000_setup_devinit);