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/*
* Board setup routines for the Motorola PrPMC2800
*
* Author: Dale Farnsworth <dale@farnsworth.org>
*
* 2007 (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/stddef.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/seq_file.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/kexec.h>
#include <mm/mmu_decl.h>
#include <sysdev/mv64x60.h>
#define MV64x60_MPP_CNTL_0 0x0000
#define MV64x60_MPP_CNTL_2 0x0008
#define MV64x60_GPP_IO_CNTL 0x0000
#define MV64x60_GPP_LEVEL_CNTL 0x0010
#define MV64x60_GPP_VALUE_SET 0x0018
#define PLATFORM_NAME_MAX 32
static char prpmc2800_platform_name[PLATFORM_NAME_MAX];
static void __iomem *mv64x60_mpp_reg_base;
static void __iomem *mv64x60_gpp_reg_base;
static void __init prpmc2800_setup_arch(void)
{
struct device_node *np;
phys_addr_t paddr;
const unsigned int *reg;
const unsigned int *prop;
/*
* ioremap mpp and gpp registers in case they are later
* needed by prpmc2800_reset_board().
*/
np = of_find_compatible_node(NULL, NULL, "marvell,mv64x60-mpp");
reg = of_get_property(np, "reg", NULL);
paddr = of_translate_address(np, reg);
of_node_put(np);
mv64x60_mpp_reg_base = ioremap(paddr, reg[1]);
np = of_find_compatible_node(NULL, NULL, "marvell,mv64x60-gpp");
reg = of_get_property(np, "reg", NULL);
paddr = of_translate_address(np, reg);
of_node_put(np);
mv64x60_gpp_reg_base = ioremap(paddr, reg[1]);
np = of_find_node_by_type(NULL, "cpu");
prop = of_get_property(np, "clock-frequency", NULL);
if (prop)
loops_per_jiffy = *prop / HZ;
of_node_put(np);
#ifdef CONFIG_PCI
mv64x60_pci_init();
#endif
printk("Motorola %s\n", prpmc2800_platform_name);
}
static void prpmc2800_reset_board(void)
{
u32 temp;
local_irq_disable();
temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0);
temp &= 0xFFFF0FFF;
out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0, temp);
temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
temp |= 0x00000004;
out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
temp |= 0x00000004;
out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2);
temp &= 0xFFFF0FFF;
out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2, temp);
temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
temp |= 0x00080000;
out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
temp |= 0x00080000;
out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_VALUE_SET, 0x00080004);
}
static void prpmc2800_restart(char *cmd)
{
volatile ulong i = 10000000;
prpmc2800_reset_board();
while (i-- > 0);
panic("restart failed\n");
}
#ifdef CONFIG_NOT_COHERENT_CACHE
#define PPRPM2800_COHERENCY_SETTING "off"
#else
#define PPRPM2800_COHERENCY_SETTING "on"
#endif
void prpmc2800_show_cpuinfo(struct seq_file *m)
{
uint memsize = total_memory;
seq_printf(m, "Vendor\t\t: Motorola\n");
seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
seq_printf(m, "coherency\t: %s\n", PPRPM2800_COHERENCY_SETTING);
}
/*
* Called very early, device-tree isn't unflattened
*/
static int __init prpmc2800_probe(void)
{
unsigned long root = of_get_flat_dt_root();
unsigned long len = PLATFORM_NAME_MAX;
void *m;
if (!of_flat_dt_is_compatible(root, "motorola,PrPMC2800"))
return 0;
/* Update ppc_md.name with name from dt */
m = of_get_flat_dt_prop(root, "model", &len);
if (m)
strncpy(prpmc2800_platform_name, m,
min((int)len, PLATFORM_NAME_MAX - 1));
return 1;
}
define_machine(prpmc2800){
.name = prpmc2800_platform_name,
.probe = prpmc2800_probe,
.setup_arch = prpmc2800_setup_arch,
.show_cpuinfo = prpmc2800_show_cpuinfo,
.init_IRQ = mv64x60_init_irq,
.get_irq = mv64x60_get_irq,
.restart = prpmc2800_restart,
.calibrate_decr = generic_calibrate_decr,
#ifdef CONFIG_KEXEC
.machine_kexec = default_machine_kexec,
.machine_kexec_prepare = default_machine_kexec_prepare,
.machine_crash_shutdown = default_machine_crash_shutdown,
#endif
};
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