arch/mips/gt64120/wrppmc/setup.c

   1 /*
   2  * setup.c: Setup pointers to hardware dependent routines.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
   9  * Copyright (C) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com>
  10  */
  11 #include <linux/init.h>
  12 #include <linux/string.h>
  13 #include <linux/kernel.h>
  14 #include <linux/tty.h>
  15 #include <linux/serial.h>
  16 #include <linux/serial_core.h>
  17 #include <linux/pm.h>
  18
  19 #include <asm/io.h>
  20 #include <asm/bootinfo.h>
  21 #include <asm/reboot.h>
  22 #include <asm/time.h>
  23 #include <asm/gt64120.h>
  24
  25 unsigned long gt64120_base = KSEG1ADDR(0x14000000);
  26
  27 #ifdef WRPPMC_EARLY_DEBUG
  28
  29 static volatile unsigned char * wrppmc_led = \
  30         (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
  31
  32 /*
  33  * PPMC LED control register:
  34  * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
  35  * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
  36  * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
  37  */
  38 void wrppmc_led_on(int mask)
  39 {
  40         unsigned char value = *wrppmc_led;
  41
  42         value &= (0xF8 | mask);
  43         *wrppmc_led = value;
  44 }
  45
  46 /* If mask = 0, turn off all LEDs */
  47 void wrppmc_led_off(int mask)
  48 {
  49         unsigned char value = *wrppmc_led;
  50
  51         value |= (0x7 & mask);
  52         *wrppmc_led = value;
  53 }
  54
  55 /*
  56  * We assume that bootloader has initialized UART16550 correctly
  57  */
  58 void __init wrppmc_early_putc(char ch)
  59 {
  60         static volatile unsigned char *wrppmc_uart = \
  61                 (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
  62         unsigned char value;
  63
  64         /* Wait until Transmit-Holding-Register is empty */
  65         while (1) {
  66                 value = *(wrppmc_uart + 5);
  67                 if (value & 0x20)
  68                         break;
  69         }
  70
  71         *wrppmc_uart = ch;
  72 }
  73
  74 void __init wrppmc_early_printk(const char *fmt, ...)
  75 {
  76         static char pbuf[256] = {'\0', };
  77         char *ch = pbuf;
  78         va_list args;
  79         unsigned int i;
  80
  81         memset(pbuf, 0, 256);
  82         va_start(args, fmt);
  83         i = vsprintf(pbuf, fmt, args);
  84         va_end(args);
  85
  86         /* Print the string */
  87         while (*ch != '\0') {
  88                 wrppmc_early_putc(*ch);
  89                 /* if print '\n', also print '\r' */
  90                 if (*ch++ == '\n')
  91                         wrppmc_early_putc('\r');
  92         }
  93 }
  94 #endif /* WRPPMC_EARLY_DEBUG */
  95
  96 void __init prom_free_prom_memory(void)
  97 {
  98 }
  99
 100 #ifdef CONFIG_SERIAL_8250
 101 static void wrppmc_setup_serial(void)
 102 {
 103         struct uart_port up;
 104
 105         memset(&up, 0x00, sizeof(struct uart_port));
 106
 107         /*
 108          * A note about mapbase/membase
 109          * -) mapbase is the physical address of the IO port.
 110          * -) membase is an 'ioremapped' cookie.
 111          */
 112         up.line = 0;
 113         up.type = PORT_16550;
 114         up.iotype = UPIO_MEM;
 115         up.mapbase = WRPPMC_UART16550_BASE;
 116         up.membase = ioremap(up.mapbase, 8);
 117         up.irq = WRPPMC_UART16550_IRQ;
 118         up.uartclk = WRPPMC_UART16550_CLOCK;
 119         up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */;
 120         up.regshift = 0;
 121
 122         early_serial_setup(&up);
 123 }
 124 #endif
 125
 126 void __init plat_mem_setup(void)
 127 {
 128         extern void wrppmc_time_init(void);
 129         extern void wrppmc_machine_restart(char *command);
 130         extern void wrppmc_machine_halt(void);
 131         extern void wrppmc_machine_power_off(void);
 132
 133         _machine_restart = wrppmc_machine_restart;
 134         _machine_halt    = wrppmc_machine_halt;
 135         pm_power_off     = wrppmc_machine_power_off;
 136
 137         /* Use MIPS Count/Compare Timer */
 138         board_time_init   = wrppmc_time_init;
 139
 140         /* This makes the operations of 'in/out[bwl]' to the
 141          * physical address ( < KSEG0) can work via KSEG1
 142          */
 143         set_io_port_base(KSEG1);
 144
 145 #ifdef CONFIG_SERIAL_8250
 146         wrppmc_setup_serial();
 147 #endif
 148 }
 149
 150 const char *get_system_type(void)
 151 {
 152         return "Wind River PPMC (GT64120)";
 153 }
 154
 155 /*
 156  * Initializes basic routines and structures pointers, memory size (as
 157  * given by the bios and saves the command line.
 158  */
 159 void __init prom_init(void)
 160 {
 161         mips_machgroup = MACH_GROUP_WINDRIVER;
 162         mips_machtype = MACH_WRPPMC;
 163
 164         add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
 165         add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
 166
 167         wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
 168                         WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
 169 }