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, " __stringify(ICOUNTLEVEL) "\n\t" 70 "movi a2, 0\n\t" 71 "wsr a2, " __stringify(ICOUNT) "\n\t" 72 "wsr a2, " __stringify(IBREAKENABLE) "\n\t" 73 "wsr a2, " __stringify(LCOUNT) "\n\t" 74 "movi a2, 0x1f\n\t" 75 "wsr a2, " __stringify(PS) "\n\t" 76 "isync\n\t" 77 "jx %0\n\t" 78 : 79 : "a" (XCHAL_RESET_VECTOR_VADDR) 80 : "a2" 81 ); 82 83 /* control never gets here */ 84 } 85 86 void __init platform_setup(char** cmdline) 87 { 88 led_print (0, "LINUX "); 89 } 90 91 /* early initialization */ 92 93 extern sysmem_info_t __initdata sysmem; 94 95 void platform_init(bp_tag_t* first) 96 { 97 /* Set default memory block if not provided by the bootloader. */ 98 99 if (sysmem.nr_banks == 0) { 100 sysmem.nr_banks = 1; 101 sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START; 102 sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START 103 + PLATFORM_DEFAULT_MEM_SIZE; 104 } 105 } 106 107 /* Heartbeat. Let the LED blink. */ 108 109 void platform_heartbeat(void) 110 { 111 static int i=0, t = 0; 112 113 if (--t < 0) 114 { 115 t = 59; 116 led_print(7, i ? ".": " "); 117 i ^= 1; 118 } 119 } 120 121 //#define RS_TABLE_SIZE 2 122 //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST) 123 124 #define _SERIAL_PORT(_base,_irq) \ 125 { \ 126 .mapbase = (_base), \ 127 .membase = (void*)(_base), \ 128 .irq = (_irq), \ 129 .uartclk = DUART16552_XTAL_FREQ, \ 130 .iotype = UPIO_MEM, \ 131 .flags = UPF_BOOT_AUTOCONF, \ 132 .regshift = 2, \ 133 } 134 135 static struct plat_serial8250_port xt2000_serial_data[] = { 136 #if XCHAL_HAVE_BE 137 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM), 138 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM), 139 #else 140 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM), 141 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM), 142 #endif 143 { } 144 }; 145 146 static struct platform_device xt2000_serial8250_device = { 147 .name = "serial8250", 148 .id = PLAT8250_DEV_PLATFORM, 149 .dev = { 150 .platform_data = xt2000_serial_data, 151 }, 152 }; 153 154 static struct resource xt2000_sonic_res[] = { 155 { 156 .start = SONIC83934_ADDR, 157 .end = SONIC83934_ADDR + 0xff, 158 .flags = IORESOURCE_MEM, 159 }, 160 { 161 .start = SONIC83934_INTNUM, 162 .end = SONIC83934_INTNUM, 163 .flags = IORESOURCE_IRQ, 164 }, 165 }; 166 167 static struct platform_device xt2000_sonic_device = { 168 .name = "xtsonic", 169 .num_resources = ARRAY_SIZE(xt2000_sonic_res), 170 .resource = xt2000_sonic_res, 171 }; 172 173 static int __init xt2000_setup_devinit(void) 174 { 175 platform_device_register(&xt2000_serial8250_device); 176 platform_device_register(&xt2000_sonic_device); 177 178 return 0; 179 } 180 181 device_initcall(xt2000_setup_devinit); 182