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ARM: orion: Refactor the MPP code common in the orion platform

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mv78xx0 and kirkwood use identical mpp code.

It should also be possible to rewrite the orion5x mpp to use this
platform code.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
This commit is contained in:
Andrew Lunn 2011-05-15 13:32:52 +02:00 committed by Nicolas Pitre
parent 4435006190
commit b2f427a108
7 changed files with 122 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
arch/arm/mach-kirkwood/mpp.c
View File

@ -14,6 +14,7 @@
#include <linux/io.h>
#include <asm/gpio.h>
#include <mach/hardware.h>
#include <plat/mpp.h>
#include "common.h"
#include "mpp.h"
@ -36,61 +37,8 @@ static unsigned int __init kirkwood_variant(void)
return 0;
}
#define MPP_CTRL(i) (DEV_BUS_VIRT_BASE + (i) * 4)
#define MPP_NR_REGS (1 + MPP_MAX/8)
void __init kirkwood_mpp_conf(unsigned int *mpp_list)
{
u32 mpp_ctrl[MPP_NR_REGS];
unsigned int variant_mask;
int i;
variant_mask = kirkwood_variant();
if (!variant_mask)
return;
printk(KERN_DEBUG "initial MPP regs:");
for (i = 0; i < MPP_NR_REGS; i++) {
mpp_ctrl[i] = readl(MPP_CTRL(i));
printk(" %08x", mpp_ctrl[i]);
}
printk("\n");
for ( ; *mpp_list; mpp_list++) {
unsigned int num = MPP_NUM(*mpp_list);
unsigned int sel = MPP_SEL(*mpp_list);
int shift, gpio_mode;
if (num > MPP_MAX) {
printk(KERN_ERR "kirkwood_mpp_conf: invalid MPP "
"number (%u)\n", num);
continue;
}
if (!(*mpp_list & variant_mask)) {
printk(KERN_WARNING
"kirkwood_mpp_conf: requested MPP%u config "
"unavailable on this hardware\n", num);
continue;
}
shift = (num & 7) << 2;
mpp_ctrl[num / 8] &= ~(0xf << shift);
mpp_ctrl[num / 8] |= sel << shift;
gpio_mode = 0;
if (*mpp_list & MPP_INPUT_MASK)
gpio_mode |= GPIO_INPUT_OK;
if (*mpp_list & MPP_OUTPUT_MASK)
gpio_mode |= GPIO_OUTPUT_OK;
if (sel != 0)
gpio_mode = 0;
orion_gpio_set_valid(num, gpio_mode);
}
printk(KERN_DEBUG " final MPP regs:");
for (i = 0; i < MPP_NR_REGS; i++) {
writel(mpp_ctrl[i], MPP_CTRL(i));
printk(" %08x", mpp_ctrl[i]);
}
printk("\n");
orion_mpp_conf(mpp_list, kirkwood_variant(),
MPP_MAX, DEV_BUS_VIRT_BASE);
}

6
arch/arm/mach-kirkwood/mpp.h
View File

@ -22,14 +22,8 @@
/* available on F6281 */ ((!!(_F6281)) << 17) | \
/* available on F6282 */ ((!!(_F6282)) << 18))
#define MPP_NUM(x) ((x) & 0xff)
#define MPP_SEL(x) (((x) >> 8) & 0xf)
/* num sel i o 6180 6190 6192 6281 6282 */
#define MPP_INPUT_MASK MPP( 0, 0x0, 1, 0, 0, 0, 0, 0, 0 )
#define MPP_OUTPUT_MASK MPP( 0, 0x0, 0, 1, 0, 0, 0, 0, 0 )
#define MPP_F6180_MASK MPP( 0, 0x0, 0, 0, 1, 0, 0, 0, 0 )
#define MPP_F6190_MASK MPP( 0, 0x0, 0, 0, 0, 1, 0, 0, 0 )
#define MPP_F6192_MASK MPP( 0, 0x0, 0, 0, 0, 0, 1, 0, 0 )

58
arch/arm/mach-mv78xx0/mpp.c
View File

@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/mbus.h>
#include <linux/io.h>
#include <plat/mpp.h>
#include <asm/gpio.h>
#include <mach/hardware.h>
#include "common.h"
@ -31,61 +32,8 @@ static unsigned int __init mv78xx0_variant(void)
return 0;
}
#define MPP_CTRL(i) (DEV_BUS_VIRT_BASE + (i) * 4)
#define MPP_NR_REGS (1 + MPP_MAX/8)
void __init mv78xx0_mpp_conf(unsigned int *mpp_list)
{
u32 mpp_ctrl[MPP_NR_REGS];
unsigned int variant_mask;
int i;
variant_mask = mv78xx0_variant();
if (!variant_mask)
return;
printk(KERN_DEBUG "initial MPP regs:");
for (i = 0; i < MPP_NR_REGS; i++) {
mpp_ctrl[i] = readl(MPP_CTRL(i));
printk(" %08x", mpp_ctrl[i]);
}
printk("\n");
for ( ; *mpp_list; mpp_list++) {
unsigned int num = MPP_NUM(*mpp_list);
unsigned int sel = MPP_SEL(*mpp_list);
int shift, gpio_mode;
if (num > MPP_MAX) {
printk(KERN_ERR "mv78xx0_mpp_conf: invalid MPP "
"number (%u)\n", num);
continue;
}
if (!(*mpp_list & variant_mask)) {
printk(KERN_WARNING
"mv78xx0_mpp_conf: requested MPP%u config "
"unavailable on this hardware\n", num);
continue;
}
shift = (num & 7) << 2;
mpp_ctrl[num / 8] &= ~(0xf << shift);
mpp_ctrl[num / 8] |= sel << shift;
gpio_mode = 0;
if (*mpp_list & MPP_INPUT_MASK)
gpio_mode |= GPIO_INPUT_OK;
if (*mpp_list & MPP_OUTPUT_MASK)
gpio_mode |= GPIO_OUTPUT_OK;
if (sel != 0)
gpio_mode = 0;
orion_gpio_set_valid(num, gpio_mode);
}
printk(KERN_DEBUG " final MPP regs:");
for (i = 0; i < MPP_NR_REGS; i++) {
writel(mpp_ctrl[i], MPP_CTRL(i));
printk(" %08x", mpp_ctrl[i]);
}
printk("\n");
orion_mpp_conf(mpp_list, mv78xx0_variant(),
MPP_MAX, DEV_BUS_VIRT_BASE);
}

6
arch/arm/mach-mv78xx0/mpp.h
View File

@ -19,14 +19,8 @@
/* may be output signal */ ((!!(_out)) << 13) | \
/* available on A0 */ ((!!(_78100_A0)) << 14))
#define MPP_NUM(x) ((x) & 0xff)
#define MPP_SEL(x) (((x) >> 8) & 0xf)
/* num sel i o 78100_A0 */
#define MPP_INPUT_MASK MPP(0, 0x0, 1, 0, 0)
#define MPP_OUTPUT_MASK MPP(0, 0x0, 0, 1, 0)
#define MPP_78100_A0_MASK MPP(0, 0x0, 0, 0, 1)
#define MPP0_GPIO MPP(0, 0x0, 1, 1, 1)

2
arch/arm/plat-orion/Makefile
View File

@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
obj-y := irq.o pcie.o time.o common.o
obj-y := irq.o pcie.o time.o common.o mpp.o
obj-m :=
obj-n :=
obj- :=

34
arch/arm/plat-orion/include/plat/mpp.h Normal file
View File

@ -0,0 +1,34 @@
/*
* arch/arm/plat-orion/include/plat/mpp.h
*
* Marvell Orion SoC MPP handling.
*
* 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.
*/
#ifndef __PLAT_MPP_H
#define __PLAT_MPP_H
#define MPP_NUM(x) ((x) & 0xff)
#define MPP_SEL(x) (((x) >> 8) & 0xf)
/* This is the generic MPP macro, without any variant information.
Each machine architecture is expected to extend this with further
bit fields indicating which MPP configurations are valid for a
specific variant. */
#define GENERIC_MPP(_num, _sel, _in, _out) ( \
/* MPP number */ ((_num) & 0xff) | \
/* MPP select value */ (((_sel) & 0xf) << 8) | \
/* may be input signal */ ((!!(_in)) << 12) | \
/* may be output signal */ ((!!(_out)) << 13))
#define MPP_INPUT_MASK GENERIC_MPP(0, 0x0, 1, 0)
#define MPP_OUTPUT_MASK GENERIC_MPP(0, 0x0, 0, 1)
void __init orion_mpp_conf(unsigned int *mpp_list, unsigned int variant_mask,
unsigned int mpp_max, unsigned int dev_bus);
#endif

81
arch/arm/plat-orion/mpp.c Normal file
View File

@ -0,0 +1,81 @@
/*
* arch/arm/plat-orion/mpp.c
*
* MPP functions for Marvell orion 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/mbus.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
#include <plat/mpp.h>
/* Address of the ith MPP control register */
static __init unsigned long mpp_ctrl_addr(unsigned int i,
unsigned long dev_bus)
{
return dev_bus + (i) * 4;
}
void __init orion_mpp_conf(unsigned int *mpp_list, unsigned int variant_mask,
unsigned int mpp_max, unsigned int dev_bus)
{
unsigned int mpp_nr_regs = (1 + mpp_max/8);
u32 mpp_ctrl[mpp_nr_regs];
int i;
if (!variant_mask)
return;
printk(KERN_DEBUG "initial MPP regs:");
for (i = 0; i < mpp_nr_regs; i++) {
mpp_ctrl[i] = readl(mpp_ctrl_addr(i, dev_bus));
printk(" %08x", mpp_ctrl[i]);
}
printk("\n");
for ( ; *mpp_list; mpp_list++) {
unsigned int num = MPP_NUM(*mpp_list);
unsigned int sel = MPP_SEL(*mpp_list);
int shift, gpio_mode;
if (num > mpp_max) {
printk(KERN_ERR "orion_mpp_conf: invalid MPP "
"number (%u)\n", num);
continue;
}
if (!(*mpp_list & variant_mask)) {
printk(KERN_WARNING
"orion_mpp_conf: requested MPP%u config "
"unavailable on this hardware\n", num);
continue;
}
shift = (num & 7) << 2;
mpp_ctrl[num / 8] &= ~(0xf << shift);
mpp_ctrl[num / 8] |= sel << shift;
gpio_mode = 0;
if (*mpp_list & MPP_INPUT_MASK)
gpio_mode |= GPIO_INPUT_OK;
if (*mpp_list & MPP_OUTPUT_MASK)
gpio_mode |= GPIO_OUTPUT_OK;
if (sel != 0)
gpio_mode = 0;
orion_gpio_set_valid(num, gpio_mode);
}
printk(KERN_DEBUG " final MPP regs:");
for (i = 0; i < mpp_nr_regs; i++) {
writel(mpp_ctrl[i], mpp_ctrl_addr(i, dev_bus));
printk(" %08x", mpp_ctrl[i]);
}
printk("\n");
}