target/linux/ar7/files/arch/mips/ar7/setup.c

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
   4  *
   5  *  This program is free software; you can distribute it and/or modify it
   6  *  under the terms of the GNU General Public License (Version 2) as
   7  *  published by the Free Software Foundation.
   8  *
   9  *  This program is distributed in the hope it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  *  for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17  */
  18 #include <linux/version.h>
  19 #include <linux/init.h>
  20 #include <linux/ioport.h>
  21 #include <linux/pm.h>
  22 #include <linux/console.h>
  23 #include <linux/serial.h>
  24 #include <linux/serial_8250.h>
  25
  26 #include <asm/reboot.h>
  27 #include <asm/time.h>
  28 #include <asm/ar7/ar7.h>
  29 #include <asm/ar7/prom.h>
  30
  31 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) /* TODO remove when 2.6.24 is stable */
  32 extern void ar7_time_init(void);
  33 #endif
  34 static void ar7_machine_restart(char *command);
  35 static void ar7_machine_halt(void);
  36 static void ar7_machine_power_off(void);
  37
  38 static void ar7_machine_restart(char *command)
  39 {
  40         u32 *softres_reg = (u32 *)ioremap(AR7_REGS_RESET +
  41                                           AR7_RESET_SOFTWARE, 1);
  42         writel(1, softres_reg);
  43 }
  44
  45 static void ar7_machine_halt(void)
  46 {
  47         while (1);
  48 }
  49
  50 static void ar7_machine_power_off(void)
  51 {
  52         u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1);
  53         u32 power_state = readl(power_reg) | (3 << 30);
  54         writel(power_state, power_reg);
  55         ar7_machine_halt();
  56 }
  57
  58 const char *get_system_type(void)
  59 {
  60         u16 chip_id = ar7_chip_id();
  61         switch (chip_id) {
  62         case AR7_CHIP_7300:
  63                 return "TI AR7 (TNETD7300)";
  64         case AR7_CHIP_7100:
  65                 return "TI AR7 (TNETD7100)";
  66         case AR7_CHIP_7200:
  67                 return "TI AR7 (TNETD7200)";
  68         default:
  69                 return "TI AR7 (Unknown)";
  70         }
  71 }
  72
  73 static int __init ar7_init_console(void)
  74 {
  75         int res;
  76
  77         static struct uart_port uart_port[2];
  78
  79         memset(uart_port, 0, sizeof(struct uart_port) * 2);
  80
  81         uart_port[0].type = PORT_AR7;
  82         uart_port[0].line = 0;
  83         uart_port[0].irq = AR7_IRQ_UART0;
  84         uart_port[0].uartclk = ar7_bus_freq() / 2;
  85         uart_port[0].iotype = UPIO_MEM;
  86         uart_port[0].mapbase = AR7_REGS_UART0;
  87         uart_port[0].membase = ioremap(uart_port[0].mapbase, 256);
  88         uart_port[0].regshift = 2;
  89         res = early_serial_setup(&uart_port[0]);
  90         if (res)
  91                 return res;
  92
  93         /* Only TNETD73xx have a second serial port */
  94         if (ar7_has_second_uart()) {
  95                 uart_port[1].type = PORT_AR7;
  96                 uart_port[1].line = 1;
  97                 uart_port[1].irq = AR7_IRQ_UART1;
  98                 uart_port[1].uartclk = ar7_bus_freq() / 2;
  99                 uart_port[1].iotype = UPIO_MEM;
 100                 uart_port[1].mapbase = UR8_REGS_UART1;
 101                 uart_port[1].membase = ioremap(uart_port[1].mapbase, 256);
 102                 uart_port[1].regshift = 2;
 103                 res = early_serial_setup(&uart_port[1]);
 104                 if (res)
 105                         return res;
 106         }
 107
 108         return add_preferred_console("ttyS", 0, NULL);
 109 }
 110
 111 /*
 112  * Initializes basic routines and structures pointers, memory size (as
 113  * given by the bios and saves the command line.
 114  */
 115
 116 extern void ar7_init_clocks(void);
 117
 118 void __init plat_mem_setup(void)
 119 {
 120         unsigned long io_base;
 121
 122         _machine_restart = ar7_machine_restart;
 123         _machine_halt = ar7_machine_halt;
 124         pm_power_off = ar7_machine_power_off;
 125 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24) /* TODO remove when 2.6.24 is stable */
 126         board_time_init = ar7_time_init;
 127 #endif
 128         panic_timeout = 3;
 129
 130         io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
 131         if (!io_base) panic("Can't remap IO base!\n");
 132         set_io_port_base(io_base);
 133
 134         prom_meminit();
 135         ar7_init_clocks();
 136
 137         ioport_resource.start = 0;
 138         ioport_resource.end   = ~0;
 139         iomem_resource.start  = 0;
 140         iomem_resource.end    = ~0;
 141
 142         printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n",
 143                                         get_system_type(),
 144                 ar7_chip_id(), ar7_chip_rev());
 145 }
 146
 147 console_initcall(ar7_init_console);