mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-15 15:53:02 +00:00
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
|
|
* arch/arm/mach-kirkwood/mpp.c
|
|
*
|
|
* MPP functions for Marvell Kirkwood SoCs
|
|
* Referenced from Linux kernel source
|
|
*
|
|
* 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 <common.h>
|
|
#include <log.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/cpu.h>
|
|
#include <asm/arch/soc.h>
|
|
#include <asm/arch/mpp.h>
|
|
|
|
static u32 kirkwood_variant(void)
|
|
{
|
|
switch (readl(KW_REG_DEVICE_ID) & 0x03) {
|
|
case 1:
|
|
return MPP_F6192_MASK;
|
|
case 2:
|
|
return MPP_F6281_MASK;
|
|
default:
|
|
debug("MPP setup: unknown kirkwood variant\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#define MPP_CTRL(i) (KW_MPP_BASE + (i* 4))
|
|
#define MPP_NR_REGS (1 + MPP_MAX/8)
|
|
|
|
void kirkwood_mpp_conf(const u32 *mpp_list, u32 *mpp_save)
|
|
{
|
|
u32 mpp_ctrl[MPP_NR_REGS];
|
|
unsigned int variant_mask;
|
|
int i;
|
|
|
|
variant_mask = kirkwood_variant();
|
|
if (!variant_mask)
|
|
return;
|
|
|
|
debug( "initial MPP regs:");
|
|
for (i = 0; i < MPP_NR_REGS; i++) {
|
|
mpp_ctrl[i] = readl(MPP_CTRL(i));
|
|
debug(" %08x", mpp_ctrl[i]);
|
|
}
|
|
debug("\n");
|
|
|
|
|
|
while (*mpp_list) {
|
|
unsigned int num = MPP_NUM(*mpp_list);
|
|
unsigned int sel = MPP_SEL(*mpp_list);
|
|
unsigned int sel_save;
|
|
int shift;
|
|
|
|
if (num > MPP_MAX) {
|
|
debug("kirkwood_mpp_conf: invalid MPP "
|
|
"number (%u)\n", num);
|
|
continue;
|
|
}
|
|
if (!(*mpp_list & variant_mask)) {
|
|
debug("kirkwood_mpp_conf: requested MPP%u config "
|
|
"unavailable on this hardware\n", num);
|
|
continue;
|
|
}
|
|
|
|
shift = (num & 7) << 2;
|
|
|
|
if (mpp_save) {
|
|
sel_save = (mpp_ctrl[num / 8] >> shift) & 0xf;
|
|
*mpp_save = num | (sel_save << 8) | variant_mask;
|
|
mpp_save++;
|
|
}
|
|
|
|
mpp_ctrl[num / 8] &= ~(0xf << shift);
|
|
mpp_ctrl[num / 8] |= sel << shift;
|
|
|
|
mpp_list++;
|
|
}
|
|
|
|
debug(" final MPP regs:");
|
|
for (i = 0; i < MPP_NR_REGS; i++) {
|
|
writel(mpp_ctrl[i], MPP_CTRL(i));
|
|
debug(" %08x", mpp_ctrl[i]);
|
|
}
|
|
debug("\n");
|
|
|
|
}
|