target/linux/xburst/files-2.6.32/arch/mips/jz4740/setup.c

   1 /*
   2  * linux/arch/mips/jz4740/common/setup.c
   3  *
   4  * JZ4740 common setup routines.
   5  *
   6  * Copyright (C) 2006 Ingenic Semiconductor Inc.
   7  *
   8  *  This program is free software; you can distribute it and/or modify it
   9  *  under the terms of the GNU General Public License (Version 2) as
  10  *  published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope it will be useful, but WITHOUT
  13  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  *  for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License along
  18  *  with this program; if not, write to the Free Software Foundation, Inc.,
  19  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  20  *
  21  */
  22 #include <linux/init.h>
  23 #include <linux/string.h>
  24 #include <linux/kernel.h>
  25 #include <linux/io.h>
  26 #include <linux/ioport.h>
  27 #include <linux/tty.h>
  28 #include <linux/serial.h>
  29 #include <linux/serial_core.h>
  30 #include <linux/serial_8250.h>
  31
  32 #include <asm/cpu.h>
  33 #include <asm/bootinfo.h>
  34 #include <asm/irq.h>
  35 #include <asm/mipsregs.h>
  36 #include <asm/reboot.h>
  37 #include <asm/pgtable.h>
  38 #include <asm/time.h>
  39 #include <asm/mach-jz4740/jz4740.h>
  40 #include <asm/mach-jz4740/regs.h>
  41 #include <asm/mach-jz4740/clock.h>
  42 #include <asm/mach-jz4740/serial.h>
  43
  44 extern char *__init prom_getcmdline(void);
  45 extern void __init jz_board_setup(void);
  46 extern void jz_restart(char *);
  47 extern void jz_halt(void);
  48 extern void jz_power_off(void);
  49 extern void jz_time_init(void);
  50
  51 static void __init soc_cpm_setup(void)
  52 {
  53         /* Enable CKO to external memory */
  54         __cpm_enable_cko();
  55
  56         /* CPU enters IDLE mode when executing 'wait' instruction */
  57         __cpm_idle_mode();
  58 }
  59
  60
  61 static void __init jz_serial_setup(void)
  62 {
  63 #ifdef CONFIG_SERIAL_8250
  64         struct uart_port s;
  65         REG8(UART0_FCR) |= UARTFCR_UUE; /* enable UART module */
  66         memset(&s, 0, sizeof(s));
  67         s.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
  68         s.iotype = SERIAL_IO_MEM;
  69         s.regshift = 2;
  70         s.uartclk = JZ_EXTAL;
  71
  72         s.line = 0;
  73         s.membase = (u8 *)UART0_BASE;
  74         s.irq = JZ_IRQ_UART0;
  75         if (early_serial_setup(&s) != 0) {
  76                 printk(KERN_ERR "Serial ttyS0 setup failed!\n");
  77         }
  78
  79         s.line = 1;
  80         s.membase = (u8 *)UART1_BASE;
  81         s.irq = JZ_IRQ_UART1;
  82         if (early_serial_setup(&s) != 0) {
  83                 printk(KERN_ERR "Serial ttyS1 setup failed!\n");
  84         }
  85 #endif
  86 }
  87
  88 void __init plat_mem_setup(void)
  89 {
  90         char *argptr;
  91
  92         argptr = prom_getcmdline();
  93
  94         /* IO/MEM resources. Which will be the addtion value in `inX' and
  95          * `outX' macros defined in asm/io.h */
  96         set_io_port_base(0);
  97         ioport_resource.start   = 0x00000000;
  98         ioport_resource.end     = 0xffffffff;
  99         iomem_resource.start    = 0x00000000;
 100         iomem_resource.end      = 0xffffffff;
 101
 102         _machine_restart = jz_restart;
 103         _machine_halt = jz_halt;
 104         pm_power_off = jz_power_off;
 105         soc_cpm_setup();
 106         jz_serial_setup();
 107 }
 108