Chris Zankel | 8fa5723 | 2008-11-06 10:17:46 -0800 | [diff] [blame] | 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); |