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/*
* arch/ppc/platforms/4xx/xilinx_ml403.c
*
* Xilinx ML403 evaluation board initialization
*
* Author: Grant Likely <grant.likely@secretlab.ca>
*
* 2005 (c) Secret Lab Technologies Ltd.
* 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/init.h>
#include <linux/irq.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/serialP.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ppc_sys.h>
#include <syslib/gen550.h>
#include <platforms/4xx/xparameters/xparameters.h>
/*
* As an overview of how the following functions (platform_init,
* ml403_map_io, ml403_setup_arch and ml403_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 == ml403_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 == ml403_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 == ml403_init_IRQ this file
* ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c
* ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c
*/
/* Board specifications structures */
struct ppc_sys_spec *cur_ppc_sys_spec;
struct ppc_sys_spec ppc_sys_specs[] = {
{
/* Only one entry, always assume the same design */
.ppc_sys_name = "Xilinx ML403 Reference Design",
.mask = 0x00000000,
.value = 0x00000000,
.num_devices = 1,
.device_list = (enum ppc_sys_devices[])
{
VIRTEX_UART,
},
},
};
#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
ml403_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
}
/* Early serial support functions */
static void __init
ml403_early_serial_init(int num, struct plat_serial8250_port *pdata)
{
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
struct uart_port serial_req;
memset(&serial_req, 0, sizeof(serial_req));
serial_req.mapbase = pdata->mapbase;
serial_req.membase = pdata->membase;
serial_req.irq = pdata->irq;
serial_req.uartclk = pdata->uartclk;
serial_req.regshift = pdata->regshift;
serial_req.iotype = pdata->iotype;
serial_req.flags = pdata->flags;
gen550_init(num, &serial_req);
#endif
}
void __init
ml403_early_serial_map(void)
{
#ifdef CONFIG_SERIAL_8250
struct plat_serial8250_port *pdata;
int i = 0;
pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(VIRTEX_UART);
while(pdata && pdata->flags)
{
pdata->membase = ioremap(pdata->mapbase, 0x100);
ml403_early_serial_init(i, pdata);
pdata++;
i++;
}
#endif /* CONFIG_SERIAL_8250 */
}
void __init
ml403_setup_arch(void)
{
ml403_early_serial_map();
ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */
/* Identify the system */
printk(KERN_INFO "Xilinx ML403 Reference System (Virtex-4 FX)\n");
}
/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
void __init
ml403_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);
identify_ppc_sys_by_id(mfspr(SPRN_PVR));
ppc_md.setup_arch = ml403_setup_arch;
ppc_md.setup_io_mappings = ml403_map_io;
ppc_md.init_IRQ = ml403_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 = ml403_early_serial_map;
#endif
}
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