1 /* 2 * arch/xtensa/platforms/xt2000/setup.c 3 * 4 * Platform specific functions for the XT2000 board. 5 * 6 * Authors: Chris Zankel <chris@zankel.net> 7 * Joe Taylor <joe@tensilica.com> 8 * 9 * Copyright 2001 - 2004 Tensilica Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 * 16 */ 17 #include <linux/stddef.h> 18 #include <linux/kernel.h> 19 #include <linux/init.h> 20 #include <linux/errno.h> 21 #include <linux/reboot.h> 22 #include <linux/kdev_t.h> 23 #include <linux/types.h> 24 #include <linux/major.h> 25 #include <linux/console.h> 26 #include <linux/delay.h> 27 #include <linux/stringify.h> 28 #include <linux/platform_device.h> 29 #include <linux/serial.h> 30 #include <linux/serial_8250.h> 31 32 #include <asm/processor.h> 33 #include <asm/platform.h> 34 #include <asm/bootparam.h> 35 #include <platform/hardware.h> 36 #include <platform/serial.h> 37 38 /* Assumes s points to an 8-chr string. No checking for NULL. */ 39 40 static void led_print (int f, char *s) 41 { 42 unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f; 43 int i; 44 for (i = f; i < 8; i++) 45 if ((*led_addr++ = *s++) == 0) 46 break; 47 } 48 49 void platform_halt(void) 50 { 51 led_print (0, " HALT "); 52 local_irq_disable(); 53 while (1); 54 } 55 56 void platform_power_off(void) 57 { 58 led_print (0, "POWEROFF"); 59 local_irq_disable(); 60 while (1); 61 } 62 63 void platform_restart(void) 64 { 65 /* Flush and reset the mmu, simulate a processor reset, and 66 * jump to the reset vector. */ 67 cpu_reset(); 68 /* control never gets here */ 69 } 70 71 void __init platform_setup(char** cmdline) 72 { 73 led_print (0, "LINUX "); 74 } 75 76 /* early initialization */ 77 78 void __init platform_init(bp_tag_t *first) 79 { 80 } 81 82 /* Heartbeat. Let the LED blink. */ 83 84 void platform_heartbeat(void) 85 { 86 static int i=0, t = 0; 87 88 if (--t < 0) 89 { 90 t = 59; 91 led_print(7, i ? ".": " "); 92 i ^= 1; 93 } 94 } 95 96 //#define RS_TABLE_SIZE 2 97 //#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF|UPF_SKIP_TEST) 98 99 #define _SERIAL_PORT(_base,_irq) \ 100 { \ 101 .mapbase = (_base), \ 102 .membase = (void*)(_base), \ 103 .irq = (_irq), \ 104 .uartclk = DUART16552_XTAL_FREQ, \ 105 .iotype = UPIO_MEM, \ 106 .flags = UPF_BOOT_AUTOCONF, \ 107 .regshift = 2, \ 108 } 109 110 static struct plat_serial8250_port xt2000_serial_data[] = { 111 #if XCHAL_HAVE_BE 112 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM), 113 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM), 114 #else 115 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM), 116 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM), 117 #endif 118 { } 119 }; 120 121 static struct platform_device xt2000_serial8250_device = { 122 .name = "serial8250", 123 .id = PLAT8250_DEV_PLATFORM, 124 .dev = { 125 .platform_data = xt2000_serial_data, 126 }, 127 }; 128 129 static struct resource xt2000_sonic_res[] = { 130 { 131 .start = SONIC83934_ADDR, 132 .end = SONIC83934_ADDR + 0xff, 133 .flags = IORESOURCE_MEM, 134 }, 135 { 136 .start = SONIC83934_INTNUM, 137 .end = SONIC83934_INTNUM, 138 .flags = IORESOURCE_IRQ, 139 }, 140 }; 141 142 static struct platform_device xt2000_sonic_device = { 143 .name = "xtsonic", 144 .num_resources = ARRAY_SIZE(xt2000_sonic_res), 145 .resource = xt2000_sonic_res, 146 }; 147 148 static int __init xt2000_setup_devinit(void) 149 { 150 platform_device_register(&xt2000_serial8250_device); 151 platform_device_register(&xt2000_sonic_device); 152 153 return 0; 154 } 155 156 device_initcall(xt2000_setup_devinit); 157