| /* |
| * 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 |
| } |
| |