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!
236 lines
5.9 KiB
C
236 lines
5.9 KiB
C
/*
|
|
* arch/ppc/platforms/lite5200.c
|
|
*
|
|
* Platform support file for the Freescale LITE5200 based on MPC52xx.
|
|
* A maximum of this file should be moved to syslib/mpc52xx_?????
|
|
* so that new platform based on MPC52xx need a minimal platform file
|
|
* ( avoid code duplication )
|
|
*
|
|
*
|
|
* Maintainer : Sylvain Munaut <tnt@246tNt.com>
|
|
*
|
|
* Based on the 2.4 code written by Kent Borg,
|
|
* Dale Farnsworth <dale.farnsworth@mvista.com> and
|
|
* Wolfgang Denk <wd@denx.de>
|
|
*
|
|
* Copyright 2004-2005 Sylvain Munaut <tnt@246tNt.com>
|
|
* Copyright 2003 Motorola Inc.
|
|
* Copyright 2003 MontaVista Software Inc.
|
|
* Copyright 2003 DENX Software Engineering (wd@denx.de)
|
|
*
|
|
* 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/initrd.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/console.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mpc52xx.h>
|
|
#include <asm/ppc_sys.h>
|
|
|
|
#include <syslib/mpc52xx_pci.h>
|
|
|
|
|
|
extern int powersave_nap;
|
|
|
|
/* Board data given by U-Boot */
|
|
bd_t __res;
|
|
EXPORT_SYMBOL(__res); /* For modules */
|
|
|
|
|
|
/* ======================================================================== */
|
|
/* Platform specific code */
|
|
/* ======================================================================== */
|
|
|
|
/* Supported PSC function in "preference" order */
|
|
struct mpc52xx_psc_func mpc52xx_psc_functions[] = {
|
|
{ .id = 0,
|
|
.func = "uart",
|
|
},
|
|
{ .id = -1, /* End entry */
|
|
.func = NULL,
|
|
}
|
|
};
|
|
|
|
|
|
static int
|
|
lite5200_show_cpuinfo(struct seq_file *m)
|
|
{
|
|
seq_printf(m, "machine\t\t: Freescale LITE5200\n");
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
static int
|
|
lite5200_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
|
|
{
|
|
return (pin == 1) && (idsel==24) ? MPC52xx_IRQ0 : -1;
|
|
}
|
|
#endif
|
|
|
|
static void __init
|
|
lite5200_setup_cpu(void)
|
|
{
|
|
struct mpc52xx_cdm __iomem *cdm;
|
|
struct mpc52xx_gpio __iomem *gpio;
|
|
struct mpc52xx_intr __iomem *intr;
|
|
struct mpc52xx_xlb __iomem *xlb;
|
|
|
|
u32 port_config;
|
|
u32 intr_ctrl;
|
|
|
|
/* Map zones */
|
|
cdm = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE);
|
|
gpio = ioremap(MPC52xx_PA(MPC52xx_GPIO_OFFSET), MPC52xx_GPIO_SIZE);
|
|
xlb = ioremap(MPC52xx_PA(MPC52xx_XLB_OFFSET), MPC52xx_XLB_SIZE);
|
|
intr = ioremap(MPC52xx_PA(MPC52xx_INTR_OFFSET), MPC52xx_INTR_SIZE);
|
|
|
|
if (!cdm || !gpio || !xlb || !intr) {
|
|
printk("lite5200.c: Error while mapping CDM/GPIO/XLB/INTR during"
|
|
"lite5200_setup_cpu\n");
|
|
goto unmap_regs;
|
|
}
|
|
|
|
/* Use internal 48 Mhz */
|
|
out_8(&cdm->ext_48mhz_en, 0x00);
|
|
out_8(&cdm->fd_enable, 0x01);
|
|
if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
|
|
out_be16(&cdm->fd_counters, 0x0001);
|
|
else
|
|
out_be16(&cdm->fd_counters, 0x5555);
|
|
|
|
/* Get port mux config */
|
|
port_config = in_be32(&gpio->port_config);
|
|
|
|
/* 48Mhz internal, pin is GPIO */
|
|
port_config &= ~0x00800000;
|
|
|
|
/* USB port */
|
|
port_config &= ~0x00007000; /* Differential mode - USB1 only */
|
|
port_config |= 0x00001000;
|
|
|
|
/* Commit port config */
|
|
out_be32(&gpio->port_config, port_config);
|
|
|
|
/* Configure the XLB Arbiter */
|
|
out_be32(&xlb->master_pri_enable, 0xff);
|
|
out_be32(&xlb->master_priority, 0x11111111);
|
|
|
|
/* Enable ram snooping for 1GB window */
|
|
out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_SNOOP);
|
|
out_be32(&xlb->snoop_window, MPC52xx_PCI_TARGET_MEM | 0x1d);
|
|
|
|
/* IRQ[0-3] setup : IRQ0 - Level Active Low */
|
|
/* IRQ[1-3] - Level Active High */
|
|
intr_ctrl = in_be32(&intr->ctrl);
|
|
intr_ctrl &= ~0x00ff0000;
|
|
intr_ctrl |= 0x00c00000;
|
|
out_be32(&intr->ctrl, intr_ctrl);
|
|
|
|
/* Unmap reg zone */
|
|
unmap_regs:
|
|
if (cdm) iounmap(cdm);
|
|
if (gpio) iounmap(gpio);
|
|
if (xlb) iounmap(xlb);
|
|
if (intr) iounmap(intr);
|
|
}
|
|
|
|
static void __init
|
|
lite5200_setup_arch(void)
|
|
{
|
|
/* CPU & Port mux setup */
|
|
lite5200_setup_cpu();
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* PCI Bridge setup */
|
|
mpc52xx_find_bridges();
|
|
#endif
|
|
}
|
|
|
|
void __init
|
|
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
|
|
unsigned long r6, unsigned long r7)
|
|
{
|
|
/* Generic MPC52xx platform initialization */
|
|
/* TODO Create one and move a max of stuff in it.
|
|
Put this init in the syslib */
|
|
|
|
struct bi_record *bootinfo = find_bootinfo();
|
|
|
|
if (bootinfo)
|
|
parse_bootinfo(bootinfo);
|
|
else {
|
|
/* Load the bd_t board info structure */
|
|
if (r3)
|
|
memcpy((void*)&__res,(void*)(r3+KERNELBASE),
|
|
sizeof(bd_t));
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
/* Load the initrd */
|
|
if (r4) {
|
|
initrd_start = r4 + KERNELBASE;
|
|
initrd_end = r5 + KERNELBASE;
|
|
}
|
|
#endif
|
|
|
|
/* Load the command line */
|
|
if (r6) {
|
|
*(char *)(r7+KERNELBASE) = 0;
|
|
strcpy(cmd_line, (char *)(r6+KERNELBASE));
|
|
}
|
|
}
|
|
|
|
/* PPC Sys identification */
|
|
identify_ppc_sys_by_id(mfspr(SPRN_SVR));
|
|
|
|
/* BAT setup */
|
|
mpc52xx_set_bat();
|
|
|
|
/* No ISA bus by default */
|
|
isa_io_base = 0;
|
|
isa_mem_base = 0;
|
|
|
|
/* Powersave */
|
|
/* This is provided as an example on how to do it. But you
|
|
need to be aware that NAP disable bus snoop and that may
|
|
be required for some devices to work properly, like USB ... */
|
|
/* powersave_nap = 1; */
|
|
|
|
|
|
/* Setup the ppc_md struct */
|
|
ppc_md.setup_arch = lite5200_setup_arch;
|
|
ppc_md.show_cpuinfo = lite5200_show_cpuinfo;
|
|
ppc_md.show_percpuinfo = NULL;
|
|
ppc_md.init_IRQ = mpc52xx_init_irq;
|
|
ppc_md.get_irq = mpc52xx_get_irq;
|
|
|
|
#ifdef CONFIG_PCI
|
|
ppc_md.pci_map_irq = lite5200_map_irq;
|
|
#endif
|
|
|
|
ppc_md.find_end_of_memory = mpc52xx_find_end_of_memory;
|
|
ppc_md.setup_io_mappings = mpc52xx_map_io;
|
|
|
|
ppc_md.restart = mpc52xx_restart;
|
|
ppc_md.power_off = mpc52xx_power_off;
|
|
ppc_md.halt = mpc52xx_halt;
|
|
|
|
/* No time keeper on the LITE5200 */
|
|
ppc_md.time_init = NULL;
|
|
ppc_md.get_rtc_time = NULL;
|
|
ppc_md.set_rtc_time = NULL;
|
|
|
|
ppc_md.calibrate_decr = mpc52xx_calibrate_decr;
|
|
#ifdef CONFIG_SERIAL_TEXT_DEBUG
|
|
ppc_md.progress = mpc52xx_progress;
|
|
#endif
|
|
}
|
|
|