175 lines
4.6 KiB
C
175 lines
4.6 KiB
C
/*
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* Xilinx ML300 evaluation board initialization
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*
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* Author: MontaVista Software, Inc.
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* source@mvista.com
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*
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* 2002-2004 (c) MontaVista Software, Inc. This file is licensed under the
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* terms of the GNU General Public License version 2. This program is licensed
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* "as is" without any warranty of any kind, whether express or implied.
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*/
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/tty.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/serial_8250.h>
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#include <linux/serialP.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/ppc_sys.h>
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#include <syslib/gen550.h>
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#include <platforms/4xx/xparameters/xparameters.h>
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/*
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* As an overview of how the following functions (platform_init,
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* ml300_map_io, ml300_setup_arch and ml300_init_IRQ) fit into the
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* kernel startup procedure, here's a call tree:
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*
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* start_here arch/ppc/kernel/head_4xx.S
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* early_init arch/ppc/kernel/setup.c
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* machine_init arch/ppc/kernel/setup.c
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* platform_init this file
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* ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c
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* parse_bootinfo
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* find_bootinfo
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* "setup some default ppc_md pointers"
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* MMU_init arch/ppc/mm/init.c
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* *ppc_md.setup_io_mappings == ml300_map_io this file
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* ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c
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* start_kernel init/main.c
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* setup_arch arch/ppc/kernel/setup.c
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* #if defined(CONFIG_KGDB)
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* *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
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* #endif
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* *ppc_md.setup_arch == ml300_setup_arch this file
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* ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c
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* ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c
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* init_IRQ arch/ppc/kernel/irq.c
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* *ppc_md.init_IRQ == ml300_init_IRQ this file
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* ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c
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* ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c
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*/
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/* Board specifications structures */
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struct ppc_sys_spec *cur_ppc_sys_spec;
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struct ppc_sys_spec ppc_sys_specs[] = {
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{
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/* Only one entry, always assume the same design */
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.ppc_sys_name = "Xilinx ML300 Reference Design",
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.mask = 0x00000000,
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.value = 0x00000000,
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.num_devices = 1,
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.device_list = (enum ppc_sys_devices[])
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{
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VIRTEX_UART,
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},
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},
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};
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#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
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static volatile unsigned *powerdown_base =
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(volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR;
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static void
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xilinx_power_off(void)
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{
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local_irq_disable();
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out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE);
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while (1) ;
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}
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#endif
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void __init
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ml300_map_io(void)
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{
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ppc4xx_map_io();
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#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
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powerdown_base = ioremap((unsigned long) powerdown_base,
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XPAR_POWER_0_POWERDOWN_HIGHADDR -
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XPAR_POWER_0_POWERDOWN_BASEADDR + 1);
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#endif
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}
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/* Early serial support functions */
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static void __init
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ml300_early_serial_init(int num, struct plat_serial8250_port *pdata)
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{
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#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
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struct uart_port serial_req;
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memset(&serial_req, 0, sizeof(serial_req));
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serial_req.mapbase = pdata->mapbase;
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serial_req.membase = pdata->membase;
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serial_req.irq = pdata->irq;
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serial_req.uartclk = pdata->uartclk;
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serial_req.regshift = pdata->regshift;
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serial_req.iotype = pdata->iotype;
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serial_req.flags = pdata->flags;
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gen550_init(num, &serial_req);
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#endif
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}
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void __init
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ml300_early_serial_map(void)
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{
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#ifdef CONFIG_SERIAL_8250
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struct plat_serial8250_port *pdata;
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int i = 0;
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pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(VIRTEX_UART);
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while(pdata && pdata->flags)
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{
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pdata->membase = ioremap(pdata->mapbase, 0x100);
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ml300_early_serial_init(i, pdata);
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pdata++;
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i++;
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}
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#endif /* CONFIG_SERIAL_8250 */
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}
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void __init
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ml300_setup_arch(void)
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{
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ml300_early_serial_map();
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ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */
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/* Identify the system */
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printk(KERN_INFO "Xilinx Virtex-II Pro port\n");
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printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
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}
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/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
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void __init
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ml300_init_irq(void)
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{
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ppc4xx_init_IRQ();
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}
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void __init
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platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
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{
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ppc4xx_init(r3, r4, r5, r6, r7);
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identify_ppc_sys_by_id(mfspr(SPRN_PVR));
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ppc_md.setup_arch = ml300_setup_arch;
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ppc_md.setup_io_mappings = ml300_map_io;
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ppc_md.init_IRQ = ml300_init_irq;
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#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
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ppc_md.power_off = xilinx_power_off;
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#endif
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#ifdef CONFIG_KGDB
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ppc_md.early_serial_map = ml300_early_serial_map;
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#endif
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}
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