arch/mips/philips/pnx8550/common/setup.c

   1 /*
   2  *
   3  * 2.6 port, Embedded Alley Solutions, Inc
   4  *
   5  *  Based on Per Hallsmark, per.hallsmark@mvista.com
   6  *
   7  *  This program is free software; you can distribute it and/or modify it
   8  *  under the terms of the GNU General Public License (Version 2) as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope it will be useful, but WITHOUT
  12  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  *  for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  19  */
  20 #include <linux/init.h>
  21 #include <linux/sched.h>
  22 #include <linux/ioport.h>
  23 #include <linux/irq.h>
  24 #include <linux/mm.h>
  25 #include <linux/delay.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/serial_pnx8xxx.h>
  28 #include <linux/pm.h>
  29
  30 #include <asm/cpu.h>
  31 #include <asm/bootinfo.h>
  32 #include <asm/irq.h>
  33 #include <asm/mipsregs.h>
  34 #include <asm/reboot.h>
  35 #include <asm/pgtable.h>
  36 #include <asm/time.h>
  37
  38 #include <glb.h>
  39 #include <int.h>
  40 #include <pci.h>
  41 #include <uart.h>
  42 #include <nand.h>
  43
  44 extern void prom_printf(char *fmt, ...);
  45
  46 extern void __init board_setup(void);
  47 extern void pnx8550_machine_restart(char *);
  48 extern void pnx8550_machine_halt(void);
  49 extern void pnx8550_machine_power_off(void);
  50 extern struct resource ioport_resource;
  51 extern struct resource iomem_resource;
  52 extern void pnx8550_time_init(void);
  53 extern void rs_kgdb_hook(int tty_no);
  54 extern void prom_printf(char *fmt, ...);
  55 extern char *prom_getcmdline(void);
  56
  57 struct resource standard_io_resources[] = {
  58         {
  59                 .start  = 0x00,
  60                 .end    = 0x1f,
  61                 .name   = "dma1",
  62                 .flags  = IORESOURCE_BUSY
  63         }, {
  64                 .start  = 0x40,
  65                 .end    = 0x5f,
  66                 .name   = "timer",
  67                 .flags  = IORESOURCE_BUSY
  68         }, {
  69                 .start  = 0x80,
  70                 .end    = 0x8f,
  71                 .name   = "dma page reg",
  72                 .flags  = IORESOURCE_BUSY
  73         }, {
  74                 .start  = 0xc0,
  75                 .end    = 0xdf,
  76                 .name   = "dma2",
  77                 .flags  = IORESOURCE_BUSY
  78         },
  79 };
  80
  81 #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
  82
  83 extern struct resource pci_io_resource;
  84 extern struct resource pci_mem_resource;
  85
  86 /* Return the total size of DRAM-memory, (RANK0 + RANK1) */
  87 unsigned long get_system_mem_size(void)
  88 {
  89         /* Read IP2031_RANK0_ADDR_LO */
  90         unsigned long dram_r0_lo = inl(PCI_BASE | 0x65010);
  91         /* Read IP2031_RANK1_ADDR_HI */
  92         unsigned long dram_r1_hi = inl(PCI_BASE | 0x65018);
  93
  94         return dram_r1_hi - dram_r0_lo + 1;
  95 }
  96
  97 int pnx8550_console_port = -1;
  98
  99 void __init plat_mem_setup(void)
 100 {
 101         int i;
 102         char* argptr;
 103
 104         board_setup();  /* board specific setup */
 105
 106         _machine_restart = pnx8550_machine_restart;
 107         _machine_halt = pnx8550_machine_halt;
 108         pm_power_off = pnx8550_machine_power_off;
 109
 110         board_time_init = pnx8550_time_init;
 111
 112         /* Clear the Global 2 Register, PCI Inta Output Enable Registers
 113            Bit 1:Enable DAC Powerdown
 114           -> 0:DACs are enabled and are working normally
 115              1:DACs are powerdown
 116            Bit 0:Enable of PCI inta output
 117           -> 0 = Disable PCI inta output
 118              1 = Enable PCI inta output
 119         */
 120         PNX8550_GLB2_ENAB_INTA_O = 0;
 121
 122         /* IO/MEM resources. */
 123         set_io_port_base(KSEG1);
 124         ioport_resource.start = 0;
 125         ioport_resource.end = ~0;
 126         iomem_resource.start = 0;
 127         iomem_resource.end = ~0;
 128
 129         /* Request I/O space for devices on this board */
 130         for (i = 0; i < STANDARD_IO_RESOURCES; i++)
 131                 request_resource(&ioport_resource, standard_io_resources + i);
 132
 133         /* Place the Mode Control bit for GPIO pin 16 in primary function */
 134         /* Pin 16 is used by UART1, UA1_TX                                */
 135         outl((PNX8550_GPIO_MODE_PRIMOP << PNX8550_GPIO_MC_16_BIT) |
 136                         (PNX8550_GPIO_MODE_PRIMOP << PNX8550_GPIO_MC_17_BIT),
 137                         PNX8550_GPIO_MC1);
 138
 139         argptr = prom_getcmdline();
 140         if ((argptr = strstr(argptr, "console=ttyS")) != NULL) {
 141                 argptr += strlen("console=ttyS");
 142                 pnx8550_console_port = *argptr == '0' ? 0 : 1;
 143
 144                 /* We must initialize the UART (console) before prom_printf */
 145                 /* Set LCR to 8-bit and BAUD to 38400 (no 5)                */
 146                 ip3106_lcr(UART_BASE, pnx8550_console_port) =
 147                         PNX8XXX_UART_LCR_8BIT;
 148                 ip3106_baud(UART_BASE, pnx8550_console_port) = 5;
 149         }
 150
 151 #ifdef CONFIG_KGDB
 152         argptr = prom_getcmdline();
 153         if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
 154                 int line;
 155                 argptr += strlen("kgdb=ttyS");
 156                 line = *argptr == '0' ? 0 : 1;
 157                 rs_kgdb_hook(line);
 158                 prom_printf("KGDB: Using ttyS%i for session, "
 159                                 "please connect your debugger\n", line ? 1 : 0);
 160         }
 161 #endif
 162         return;
 163 }