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); 151