1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
237 lines
5.9 KiB
C
237 lines
5.9 KiB
C
/*
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* arch/ppc/platforms/lite5200.c
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*
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* Platform support file for the Freescale LITE5200 based on MPC52xx.
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* A maximum of this file should be moved to syslib/mpc52xx_?????
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* so that new platform based on MPC52xx need a minimal platform file
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* ( avoid code duplication )
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*
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*
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* Maintainer : Sylvain Munaut <tnt@246tNt.com>
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*
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* Based on the 2.4 code written by Kent Borg,
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* Dale Farnsworth <dale.farnsworth@mvista.com> and
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* Wolfgang Denk <wd@denx.de>
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*
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* Copyright 2004-2005 Sylvain Munaut <tnt@246tNt.com>
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* Copyright 2003 Motorola Inc.
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* Copyright 2003 MontaVista Software Inc.
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* Copyright 2003 DENX Software Engineering (wd@denx.de)
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/config.h>
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#include <linux/initrd.h>
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#include <linux/seq_file.h>
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#include <linux/kdev_t.h>
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#include <linux/root_dev.h>
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#include <linux/console.h>
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#include <linux/module.h>
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#include <asm/bootinfo.h>
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#include <asm/io.h>
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#include <asm/mpc52xx.h>
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#include <asm/ppc_sys.h>
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#include <syslib/mpc52xx_pci.h>
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extern int powersave_nap;
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/* Board data given by U-Boot */
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bd_t __res;
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EXPORT_SYMBOL(__res); /* For modules */
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/* ======================================================================== */
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/* Platform specific code */
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/* ======================================================================== */
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/* Supported PSC function in "preference" order */
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struct mpc52xx_psc_func mpc52xx_psc_functions[] = {
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{ .id = 0,
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.func = "uart",
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},
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{ .id = -1, /* End entry */
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.func = NULL,
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}
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};
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static int
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lite5200_show_cpuinfo(struct seq_file *m)
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{
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seq_printf(m, "machine\t\t: Freescale LITE5200\n");
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return 0;
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}
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#ifdef CONFIG_PCI
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static int
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lite5200_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
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{
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return (pin == 1) && (idsel==24) ? MPC52xx_IRQ0 : -1;
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}
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#endif
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static void __init
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lite5200_setup_cpu(void)
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{
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struct mpc52xx_cdm __iomem *cdm;
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struct mpc52xx_gpio __iomem *gpio;
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struct mpc52xx_intr __iomem *intr;
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struct mpc52xx_xlb __iomem *xlb;
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u32 port_config;
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u32 intr_ctrl;
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/* Map zones */
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cdm = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE);
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gpio = ioremap(MPC52xx_PA(MPC52xx_GPIO_OFFSET), MPC52xx_GPIO_SIZE);
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xlb = ioremap(MPC52xx_PA(MPC52xx_XLB_OFFSET), MPC52xx_XLB_SIZE);
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intr = ioremap(MPC52xx_PA(MPC52xx_INTR_OFFSET), MPC52xx_INTR_SIZE);
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if (!cdm || !gpio || !xlb || !intr) {
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printk("lite5200.c: Error while mapping CDM/GPIO/XLB/INTR during"
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"lite5200_setup_cpu\n");
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goto unmap_regs;
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}
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/* Use internal 48 Mhz */
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out_8(&cdm->ext_48mhz_en, 0x00);
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out_8(&cdm->fd_enable, 0x01);
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if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
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out_be16(&cdm->fd_counters, 0x0001);
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else
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out_be16(&cdm->fd_counters, 0x5555);
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/* Get port mux config */
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port_config = in_be32(&gpio->port_config);
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/* 48Mhz internal, pin is GPIO */
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port_config &= ~0x00800000;
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/* USB port */
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port_config &= ~0x00007000; /* Differential mode - USB1 only */
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port_config |= 0x00001000;
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/* Commit port config */
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out_be32(&gpio->port_config, port_config);
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/* Configure the XLB Arbiter */
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out_be32(&xlb->master_pri_enable, 0xff);
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out_be32(&xlb->master_priority, 0x11111111);
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/* Enable ram snooping for 1GB window */
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out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_SNOOP);
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out_be32(&xlb->snoop_window, MPC52xx_PCI_TARGET_MEM | 0x1d);
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/* IRQ[0-3] setup : IRQ0 - Level Active Low */
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/* IRQ[1-3] - Level Active High */
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intr_ctrl = in_be32(&intr->ctrl);
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intr_ctrl &= ~0x00ff0000;
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intr_ctrl |= 0x00c00000;
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out_be32(&intr->ctrl, intr_ctrl);
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/* Unmap reg zone */
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unmap_regs:
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if (cdm) iounmap(cdm);
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if (gpio) iounmap(gpio);
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if (xlb) iounmap(xlb);
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if (intr) iounmap(intr);
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}
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static void __init
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lite5200_setup_arch(void)
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{
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/* CPU & Port mux setup */
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lite5200_setup_cpu();
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#ifdef CONFIG_PCI
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/* PCI Bridge setup */
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mpc52xx_find_bridges();
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#endif
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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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/* Generic MPC52xx platform initialization */
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/* TODO Create one and move a max of stuff in it.
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Put this init in the syslib */
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struct bi_record *bootinfo = find_bootinfo();
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if (bootinfo)
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parse_bootinfo(bootinfo);
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else {
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/* Load the bd_t board info structure */
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if (r3)
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memcpy((void*)&__res,(void*)(r3+KERNELBASE),
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sizeof(bd_t));
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#ifdef CONFIG_BLK_DEV_INITRD
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/* Load the initrd */
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if (r4) {
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initrd_start = r4 + KERNELBASE;
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initrd_end = r5 + KERNELBASE;
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}
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#endif
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/* Load the command line */
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if (r6) {
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*(char *)(r7+KERNELBASE) = 0;
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strcpy(cmd_line, (char *)(r6+KERNELBASE));
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}
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}
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/* PPC Sys identification */
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identify_ppc_sys_by_id(mfspr(SPRN_SVR));
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/* BAT setup */
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mpc52xx_set_bat();
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/* No ISA bus by default */
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isa_io_base = 0;
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isa_mem_base = 0;
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/* Powersave */
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/* This is provided as an example on how to do it. But you
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need to be aware that NAP disable bus snoop and that may
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be required for some devices to work properly, like USB ... */
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/* powersave_nap = 1; */
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/* Setup the ppc_md struct */
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ppc_md.setup_arch = lite5200_setup_arch;
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ppc_md.show_cpuinfo = lite5200_show_cpuinfo;
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ppc_md.show_percpuinfo = NULL;
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ppc_md.init_IRQ = mpc52xx_init_irq;
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ppc_md.get_irq = mpc52xx_get_irq;
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#ifdef CONFIG_PCI
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ppc_md.pci_map_irq = lite5200_map_irq;
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#endif
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ppc_md.find_end_of_memory = mpc52xx_find_end_of_memory;
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ppc_md.setup_io_mappings = mpc52xx_map_io;
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ppc_md.restart = mpc52xx_restart;
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ppc_md.power_off = mpc52xx_power_off;
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ppc_md.halt = mpc52xx_halt;
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/* No time keeper on the LITE5200 */
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ppc_md.time_init = NULL;
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ppc_md.get_rtc_time = NULL;
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ppc_md.set_rtc_time = NULL;
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ppc_md.calibrate_decr = mpc52xx_calibrate_decr;
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#ifdef CONFIG_SERIAL_TEXT_DEBUG
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ppc_md.progress = mpc52xx_progress;
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#endif
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}
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