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/*
* arch/arm/mach-dove/mpp.c
*
* MPP functions for Marvell Dove 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/gpio.h>
#include <linux/io.h>
#include <mach/dove.h>
#include "mpp.h"
#define MPP_NR_REGS 4
#define MPP_CTRL(i) ((i) == 3 ? \
DOVE_MPP_CTRL4_VIRT_BASE : \
DOVE_MPP_VIRT_BASE + (i) * 4)
#define PMU_SIG_REGS 2
#define PMU_SIG_CTRL(i) (DOVE_PMU_SIG_CTRL + (i) * 4)
struct dove_mpp_grp {
int start;
int end;
};
static struct dove_mpp_grp dove_mpp_grp[] = {
[MPP_24_39] = {
.start = 24,
.end = 39,
},
[MPP_40_45] = {
.start = 40,
.end = 45,
},
[MPP_46_51] = {
.start = 40,
.end = 45,
},
[MPP_58_61] = {
.start = 58,
.end = 61,
},
[MPP_62_63] = {
.start = 62,
.end = 63,
},
};
static void dove_mpp_gpio_mode(int start, int end, int gpio_mode)
{
int i;
for (i = start; i <= end; i++)
orion_gpio_set_valid(i, gpio_mode);
}
static void dove_mpp_dump_regs(void)
{
#ifdef DEBUG
int i;
pr_debug("MPP_CTRL regs:");
for (i = 0; i < MPP_NR_REGS; i++)
printk(" %08x", readl(MPP_CTRL(i)));
printk("\n");
pr_debug("PMU_SIG_CTRL regs:");
for (i = 0; i < PMU_SIG_REGS; i++)
printk(" %08x", readl(PMU_SIG_CTRL(i)));
printk("\n");
pr_debug("PMU_MPP_GENERAL_CTRL: %08x\n", readl(DOVE_PMU_MPP_GENERAL_CTRL));
pr_debug("MPP_GENERAL: %08x\n", readl(DOVE_MPP_GENERAL_VIRT_BASE));
#endif
}
static void dove_mpp_cfg_nfc(int sel)
{
u32 mpp_gen_cfg = readl(DOVE_MPP_GENERAL_VIRT_BASE);
mpp_gen_cfg &= ~0x1;
mpp_gen_cfg |= sel;
writel(mpp_gen_cfg, DOVE_MPP_GENERAL_VIRT_BASE);
dove_mpp_gpio_mode(64, 71, GPIO_OUTPUT_OK);
}
static void dove_mpp_cfg_au1(int sel)
{
u32 mpp_ctrl4 = readl(DOVE_MPP_CTRL4_VIRT_BASE);
u32 ssp_ctrl1 = readl(DOVE_SSP_CTRL_STATUS_1);
u32 mpp_gen_ctrl = readl(DOVE_MPP_GENERAL_VIRT_BASE);
u32 global_cfg_2 = readl(DOVE_GLOBAL_CONFIG_2);
mpp_ctrl4 &= ~(DOVE_AU1_GPIO_SEL);
ssp_ctrl1 &= ~(DOVE_SSP_ON_AU1);
mpp_gen_ctrl &= ~(DOVE_AU1_SPDIFO_GPIO_EN);
global_cfg_2 &= ~(DOVE_TWSI_OPTION3_GPIO);
if (!sel || sel == 0x2)
dove_mpp_gpio_mode(52, 57, 0);
else
dove_mpp_gpio_mode(52, 57, GPIO_OUTPUT_OK | GPIO_INPUT_OK);
if (sel & 0x1) {
global_cfg_2 |= DOVE_TWSI_OPTION3_GPIO;
dove_mpp_gpio_mode(56, 57, 0);
}
if (sel & 0x2) {
mpp_gen_ctrl |= DOVE_AU1_SPDIFO_GPIO_EN;
dove_mpp_gpio_mode(57, 57, GPIO_OUTPUT_OK | GPIO_INPUT_OK);
}
if (sel & 0x4) {
ssp_ctrl1 |= DOVE_SSP_ON_AU1;
dove_mpp_gpio_mode(52, 55, 0);
}
if (sel & 0x8)
mpp_ctrl4 |= DOVE_AU1_GPIO_SEL;
writel(mpp_ctrl4, DOVE_MPP_CTRL4_VIRT_BASE);
writel(ssp_ctrl1, DOVE_SSP_CTRL_STATUS_1);
writel(mpp_gen_ctrl, DOVE_MPP_GENERAL_VIRT_BASE);
writel(global_cfg_2, DOVE_GLOBAL_CONFIG_2);
}
static void dove_mpp_conf_grp(int num, int sel, u32 *mpp_ctrl)
{
int start = dove_mpp_grp[num].start;
int end = dove_mpp_grp[num].end;
int gpio_mode = sel ? GPIO_OUTPUT_OK | GPIO_INPUT_OK : 0;
*mpp_ctrl &= ~(0x1 << num);
*mpp_ctrl |= sel << num;
dove_mpp_gpio_mode(start, end, gpio_mode);
}
void __init dove_mpp_conf(unsigned int *mpp_list)
{
u32 mpp_ctrl[MPP_NR_REGS];
u32 pmu_mpp_ctrl = 0;
u32 pmu_sig_ctrl[PMU_SIG_REGS];
int i;
/* Initialize gpiolib. */
orion_gpio_init();
for (i = 0; i < MPP_NR_REGS; i++)
mpp_ctrl[i] = readl(MPP_CTRL(i));
for (i = 0; i < PMU_SIG_REGS; i++)
pmu_sig_ctrl[i] = readl(PMU_SIG_CTRL(i));
pmu_mpp_ctrl = readl(DOVE_PMU_MPP_GENERAL_CTRL);
dove_mpp_dump_regs();
for ( ; *mpp_list != MPP_END; mpp_list++) {
unsigned int num = MPP_NUM(*mpp_list);
unsigned int sel = MPP_SEL(*mpp_list);
int shift, gpio_mode;
if (num > MPP_MAX) {
pr_err("dove: invalid MPP number (%u)\n", num);
continue;
}
if (*mpp_list & MPP_NFC_MASK) {
dove_mpp_cfg_nfc(sel);
continue;
}
if (*mpp_list & MPP_AU1_MASK) {
dove_mpp_cfg_au1(sel);
continue;
}
if (*mpp_list & MPP_GRP_MASK) {
dove_mpp_conf_grp(num, sel, &mpp_ctrl[3]);
continue;
}
shift = (num & 7) << 2;
if (*mpp_list & MPP_PMU_MASK) {
pmu_mpp_ctrl |= (0x1 << num);
pmu_sig_ctrl[num / 8] &= ~(0xf << shift);
pmu_sig_ctrl[num / 8] |= 0xf << shift;
gpio_mode = 0;
} else {
mpp_ctrl[num / 8] &= ~(0xf << shift);
mpp_ctrl[num / 8] |= sel << shift;
gpio_mode = GPIO_OUTPUT_OK | GPIO_INPUT_OK;
}
orion_gpio_set_valid(num, gpio_mode);
}
for (i = 0; i < MPP_NR_REGS; i++)
writel(mpp_ctrl[i], MPP_CTRL(i));
for (i = 0; i < PMU_SIG_REGS; i++)
writel(pmu_sig_ctrl[i], PMU_SIG_CTRL(i));
writel(pmu_mpp_ctrl, DOVE_PMU_MPP_GENERAL_CTRL);
dove_mpp_dump_regs();
}
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