909aeca664
Includes fix for Xilinx silicon errata 213 Signed-off-by: Grant C. Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
178 lines
4.6 KiB
C
178 lines
4.6 KiB
C
/*
|
|
* 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/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/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
|
|
}
|
|
|