You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
167 lines
3.5 KiB
C
167 lines
3.5 KiB
C
/*
|
|
* arch/arm/mach-mcs814x/common.c
|
|
*
|
|
* Core functions for Moschip MCS814x SoCs
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/reboot.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <mach/mcs814x.h>
|
|
#include <mach/cpu.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/mach/map.h>
|
|
|
|
void __iomem *mcs814x_sysdbg_base;
|
|
|
|
static struct map_desc mcs814x_io_desc[] __initdata = {
|
|
{
|
|
.virtual = MCS814X_IO_BASE,
|
|
.pfn = __phys_to_pfn(MCS814X_IO_START),
|
|
.length = MCS814X_IO_SIZE,
|
|
.type = MT_DEVICE
|
|
},
|
|
};
|
|
|
|
struct cpu_mode {
|
|
const char *name;
|
|
int gpio_start;
|
|
int gpio_end;
|
|
};
|
|
|
|
static const struct cpu_mode cpu_modes[] = {
|
|
{
|
|
.name = "I2S",
|
|
.gpio_start = 4,
|
|
.gpio_end = 8,
|
|
},
|
|
{
|
|
.name = "UART",
|
|
.gpio_start = 4,
|
|
.gpio_end = 9,
|
|
},
|
|
{
|
|
.name = "External MII",
|
|
.gpio_start = 0,
|
|
.gpio_end = 16,
|
|
},
|
|
{
|
|
.name = "Normal",
|
|
.gpio_start = -1,
|
|
.gpio_end = -1,
|
|
},
|
|
};
|
|
|
|
static void mcs814x_eth_hardware_filter_set(u8 value)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl_relaxed(MCS814X_VIRT_BASE + MCS814X_DBGLED);
|
|
if (value)
|
|
reg |= 0x80;
|
|
else
|
|
reg &= ~0x80;
|
|
writel_relaxed(reg, MCS814X_VIRT_BASE + MCS814X_DBGLED);
|
|
}
|
|
|
|
static void mcs814x_eth_led_cfg_set(u8 cfg)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl_relaxed(mcs814x_sysdbg_base + SYSDBG_BS2);
|
|
reg &= ~LED_CFG_MASK;
|
|
reg |= cfg;
|
|
writel_relaxed(reg, mcs814x_sysdbg_base + SYSDBG_BS2);
|
|
}
|
|
|
|
static void mcs814x_eth_buffer_shifting_set(u8 value)
|
|
{
|
|
u8 reg;
|
|
|
|
reg = readb_relaxed(mcs814x_sysdbg_base + SYSDBG_SYSCTL_MAC);
|
|
if (value)
|
|
reg |= BUF_SHIFT_BIT;
|
|
else
|
|
reg &= ~BUF_SHIFT_BIT;
|
|
writeb_relaxed(reg, mcs814x_sysdbg_base + SYSDBG_SYSCTL_MAC);
|
|
}
|
|
|
|
static struct of_device_id mcs814x_eth_ids[] __initdata = {
|
|
{ .compatible = "moschip,nuport-mac", },
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
/* Configure platform specific knobs based on ethernet device node
|
|
* properties */
|
|
static void mcs814x_eth_init(void)
|
|
{
|
|
struct device_node *np;
|
|
const unsigned int *intspec;
|
|
|
|
np = of_find_matching_node(NULL, mcs814x_eth_ids);
|
|
if (!np)
|
|
return;
|
|
|
|
/* hardware filter must always be enabled */
|
|
mcs814x_eth_hardware_filter_set(1);
|
|
|
|
intspec = of_get_property(np, "nuport-mac,buffer-shifting", NULL);
|
|
if (!intspec)
|
|
mcs814x_eth_buffer_shifting_set(0);
|
|
else
|
|
mcs814x_eth_buffer_shifting_set(1);
|
|
|
|
intspec = of_get_property(np, "nuport-mac,link-activity", NULL);
|
|
if (intspec)
|
|
mcs814x_eth_led_cfg_set(be32_to_cpup(intspec));
|
|
|
|
of_node_put(np);
|
|
}
|
|
|
|
void __init mcs814x_init_machine(void)
|
|
{
|
|
u32 bs2, cpu_mode;
|
|
int gpio;
|
|
|
|
bs2 = readl_relaxed(mcs814x_sysdbg_base + SYSDBG_BS2);
|
|
cpu_mode = (bs2 >> CPU_MODE_SHIFT) & CPU_MODE_MASK;
|
|
|
|
pr_info("CPU mode: %s\n", cpu_modes[cpu_mode].name);
|
|
|
|
/* request the gpios since the pins are muxed for functionnality */
|
|
for (gpio = cpu_modes[cpu_mode].gpio_start;
|
|
gpio == cpu_modes[cpu_mode].gpio_end; gpio++) {
|
|
if (gpio != -1)
|
|
gpio_request(gpio, cpu_modes[cpu_mode].name);
|
|
}
|
|
|
|
mcs814x_eth_init();
|
|
}
|
|
|
|
void __init mcs814x_map_io(void)
|
|
{
|
|
iotable_init(mcs814x_io_desc, ARRAY_SIZE(mcs814x_io_desc));
|
|
|
|
mcs814x_sysdbg_base = ioremap(MCS814X_IO_START + MCS814X_SYSDBG,
|
|
MCS814X_SYSDBG_SIZE);
|
|
if (!mcs814x_sysdbg_base)
|
|
panic("unable to remap sysdbg base");
|
|
}
|
|
|
|
void mcs814x_restart(enum reboot_mode mode, const char *cmd)
|
|
{
|
|
writel_relaxed(~(1 << 31), mcs814x_sysdbg_base);
|
|
}
|