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 68 __asm__ __volatile__ ("movi a2, 15\n\t" 69 "wsr a2, icountlevel\n\t" 70 "movi a2, 0\n\t" 71 "wsr a2, icount\n\t" 72 #if XCHAL_NUM_IBREAK > 0 73 "wsr a2, ibreakenable\n\t" 74 #endif 75 #if XCHAL_HAVE_LOOPS 76 "wsr a2, lcount\n\t" 77 #endif 78 "movi a2, 0x1f\n\t" 79 "wsr a2, ps\n\t" 80 "isync\n\t" 81 "jx %0\n\t" 82 : 83 : "a" (XCHAL_RESET_VECTOR_VADDR) 84 : "a2" 85 ); 86 87 /* control never gets here */ 88 } 89 90 void __init platform_setup(char** cmdline) 91 { 92 led_print (0, "LINUX "); 93 } 94 95 /* early initialization */ 96 97 void __init platform_init(bp_tag_t *first) 98 { 99 } 100 101 /* Heartbeat. Let the LED blink. */ 102 103 void platform_heartbeat(void) 104 { 105 static int i=0, t = 0; 106 107 if (--t < 0) 108 { 109 t = 59; 110 led_print(7, i ? ".": " "); 111 i ^= 1; 112 } 113 } 114 115 //#define RS_TABLE_SIZE 2 116 //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST) 117 118 #define _SERIAL_PORT(_base,_irq) \ 119 { \ 120 .mapbase = (_base), \ 121 .membase = (void*)(_base), \ 122 .irq = (_irq), \ 123 .uartclk = DUART16552_XTAL_FREQ, \ 124 .iotype = UPIO_MEM, \ 125 .flags = UPF_BOOT_AUTOCONF, \ 126 .regshift = 2, \ 127 } 128 129 static struct plat_serial8250_port xt2000_serial_data[] = { 130 #if XCHAL_HAVE_BE 131 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM), 132 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM), 133 #else 134 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM), 135 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM), 136 #endif 137 { } 138 }; 139 140 static struct platform_device xt2000_serial8250_device = { 141 .name = "serial8250", 142 .id = PLAT8250_DEV_PLATFORM, 143 .dev = { 144 .platform_data = xt2000_serial_data, 145 }, 146 }; 147 148 static struct resource xt2000_sonic_res[] = { 149 { 150 .start = SONIC83934_ADDR, 151 .end = SONIC83934_ADDR + 0xff, 152 .flags = IORESOURCE_MEM, 153 }, 154 { 155 .start = SONIC83934_INTNUM, 156 .end = SONIC83934_INTNUM, 157 .flags = IORESOURCE_IRQ, 158 }, 159 }; 160 161 static struct platform_device xt2000_sonic_device = { 162 .name = "xtsonic", 163 .num_resources = ARRAY_SIZE(xt2000_sonic_res), 164 .resource = xt2000_sonic_res, 165 }; 166 167 static int __init xt2000_setup_devinit(void) 168 { 169 platform_device_register(&xt2000_serial8250_device); 170 platform_device_register(&xt2000_sonic_device); 171 172 return 0; 173 } 174 175 device_initcall(xt2000_setup_devinit); 176