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/*
* arch/ppc/platforms/4xx/xilinx_ml300.c
*
* Xilinx ML300 evaluation board initialization
*
* Author: MontaVista Software, Inc.
* source@mvista.com
*
* 2002-2004 (c) MontaVista Software, Inc. This file is licensed under the
* terms of the GNU General Public License version 2. This program is licensed
* "as is" without any warranty of any kind, whether express or implied.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serialP.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ocp.h>
#include <platforms/4xx/virtex-ii_pro.h> /* for NR_SER_PORTS */
/*
* As an overview of how the following functions (platform_init,
* ml300_map_io, ml300_setup_arch and ml300_init_IRQ) fit into the
* kernel startup procedure, here's a call tree:
*
* start_here arch/ppc/kernel/head_4xx.S
* early_init arch/ppc/kernel/setup.c
* machine_init arch/ppc/kernel/setup.c
* platform_init this file
* ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c
* parse_bootinfo
* find_bootinfo
* "setup some default ppc_md pointers"
* MMU_init arch/ppc/mm/init.c
* *ppc_md.setup_io_mappings == ml300_map_io this file
* ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c
* start_kernel init/main.c
* setup_arch arch/ppc/kernel/setup.c
* #if defined(CONFIG_KGDB)
* *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
* #endif
* *ppc_md.setup_arch == ml300_setup_arch this file
* ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c
* ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c
* init_IRQ arch/ppc/kernel/irq.c
* *ppc_md.init_IRQ == ml300_init_IRQ this file
* ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c
* ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c
*/
#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
static volatile unsigned *powerdown_base =
(volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR;
static void
xilinx_power_off(void)
{
local_irq_disable();
out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE);
while (1) ;
}
#endif
void __init
ml300_map_io(void)
{
ppc4xx_map_io();
#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
powerdown_base = ioremap((unsigned long) powerdown_base,
XPAR_POWER_0_POWERDOWN_HIGHADDR -
XPAR_POWER_0_POWERDOWN_BASEADDR + 1);
#endif
}
static void __init
ml300_early_serial_map(void)
{
#ifdef CONFIG_SERIAL_8250
struct serial_state old_ports[] = { SERIAL_PORT_DFNS };
struct uart_port port;
int i;
/* Setup ioremapped serial port access */
for (i = 0; i < ARRAY_SIZE(old_ports); i++ ) {
memset(&port, 0, sizeof(port));
port.membase = ioremap((phys_addr_t)(old_ports[i].iomem_base), 16);
port.irq = old_ports[i].irq;
port.uartclk = old_ports[i].baud_base * 16;
port.regshift = old_ports[i].iomem_reg_shift;
port.iotype = UPIO_MEM;
port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
port.line = i;
if (early_serial_setup(&port) != 0) {
printk("Early serial init of port %d failed\n", i);
}
}
#endif /* CONFIG_SERIAL_8250 */
}
void __init
ml300_setup_arch(void)
{
ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */
ml300_early_serial_map();
/* Identify the system */
printk(KERN_INFO "Xilinx Virtex-II Pro port\n");
printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
}
/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
void __init
ml300_init_irq(void)
{
ppc4xx_init_IRQ();
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
ppc4xx_init(r3, r4, r5, r6, r7);
ppc_md.setup_arch = ml300_setup_arch;
ppc_md.setup_io_mappings = ml300_map_io;
ppc_md.init_IRQ = ml300_init_irq;
#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
ppc_md.power_off = xilinx_power_off;
#endif
#ifdef CONFIG_KGDB
ppc_md.early_serial_map = ml300_early_serial_map;
#endif
}
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