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/serial_8250.h>
  18 #include <linux/pm.h>
  19
  20 #include <asm/io.h>
  21 #include <asm/bootinfo.h>
  22 #include <asm/reboot.h>
  23 #include <asm/time.h>
  24 #include <asm/gt64120.h>
  25
  26 unsigned long gt64120_base = KSEG1ADDR(0x14000000);
  27
  28 #ifdef WRPPMC_EARLY_DEBUG
  29
  30 static volatile unsigned char * wrppmc_led = \
  31         (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
  32
  33 /*
  34  * PPMC LED control register:
  35  * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
  36  * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
  37  * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
  38  */
  39 void wrppmc_led_on(int mask)
  40 {
  41         unsigned char value = *wrppmc_led;
  42
  43         value &= (0xF8 | mask);
  44         *wrppmc_led = value;
  45 }
  46
  47 /* If mask = 0, turn off all LEDs */
  48 void wrppmc_led_off(int mask)
  49 {
  50         unsigned char value = *wrppmc_led;
  51
  52         value |= (0x7 & mask);
  53         *wrppmc_led = value;
  54 }
  55
  56 /*
  57  * We assume that bootloader has initialized UART16550 correctly
  58  */
  59 void __init wrppmc_early_putc(char ch)
  60 {
  61         static volatile unsigned char *wrppmc_uart = \
  62                 (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
  63         unsigned char value;
  64
  65         /* Wait until Transmit-Holding-Register is empty */
  66         while (1) {
  67                 value = *(wrppmc_uart + 5);
  68                 if (value & 0x20)
  69                         break;
  70         }
  71
  72         *wrppmc_uart = ch;
  73 }
  74
  75 void __init wrppmc_early_printk(const char *fmt, ...)
  76 {
  77         static char pbuf[256] = {'\0', };
  78         char *ch = pbuf;
  79         va_list args;
  80         unsigned int i;
  81
  82         memset(pbuf, 0, 256);
  83         va_start(args, fmt);
  84         i = vsprintf(pbuf, fmt, args);
  85         va_end(args);
  86
  87         /* Print the string */
  88         while (*ch != '\0') {
  89                 wrppmc_early_putc(*ch);
  90                 /* if print '\n', also print '\r' */
  91                 if (*ch++ == '\n')
  92                         wrppmc_early_putc('\r');
  93         }
  94 }
  95 #endif /* WRPPMC_EARLY_DEBUG */
  96
  97 void __init prom_free_prom_memory(void)
  98 {
  99 }
 100
 101 #ifdef CONFIG_SERIAL_8250
 102 static void wrppmc_setup_serial(void)
 103 {
 104         struct uart_port up;
 105
 106         memset(&up, 0x00, sizeof(struct uart_port));
 107
 108         /*
 109          * A note about mapbase/membase
 110          * -) mapbase is the physical address of the IO port.
 111          * -) membase is an 'ioremapped' cookie.
 112          */
 113         up.line = 0;
 114         up.type = PORT_16550;
 115         up.iotype = UPIO_MEM;
 116         up.mapbase = WRPPMC_UART16550_BASE;
 117         up.membase = ioremap(up.mapbase, 8);
 118         up.irq = WRPPMC_UART16550_IRQ;
 119         up.uartclk = WRPPMC_UART16550_CLOCK;
 120         up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */;
 121         up.regshift = 0;
 122
 123         early_serial_setup(&up);
 124 }
 125 #endif
 126
 127 void __init plat_mem_setup(void)
 128 {
 129         extern void wrppmc_time_init(void);
 130         extern void wrppmc_machine_restart(char *command);
 131         extern void wrppmc_machine_halt(void);
 132         extern void wrppmc_machine_power_off(void);
 133
 134         _machine_restart = wrppmc_machine_restart;
 135         _machine_halt    = wrppmc_machine_halt;
 136         pm_power_off     = wrppmc_machine_power_off;
 137
 138         /* Use MIPS Count/Compare Timer */
 139         board_time_init   = wrppmc_time_init;
 140
 141         /* This makes the operations of 'in/out[bwl]' to the
 142          * physical address ( < KSEG0) can work via KSEG1
 143          */
 144         set_io_port_base(KSEG1);
 145
 146 #ifdef CONFIG_SERIAL_8250
 147         wrppmc_setup_serial();
 148 #endif
 149 }
 150
 151 const char *get_system_type(void)
 152 {
 153         return "Wind River PPMC (GT64120)";
 154 }
 155
 156 /*
 157  * Initializes basic routines and structures pointers, memory size (as
 158  * given by the bios and saves the command line.
 159  */
 160 void __init prom_init(void)
 161 {
 162         mips_machgroup = MACH_GROUP_WINDRIVER;
 163         mips_machtype = MACH_WRPPMC;
 164
 165         add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
 166         add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
 167
 168         wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
 169                         WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
 170 }