/arch/arm/mach-fsm/tlmm-msm8660.c

  1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
  2 *
  3 * This program is free software; you can redistribute it and/or modify
  4 * it under the terms of the GNU General Public License version 2 and
  5 * only version 2 as published by the Free Software Foundation.
  6 *
  7 * This program is distributed in the hope that it will be useful,
  8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 10 * GNU General Public License for more details.
 11 *
 12 * You should have received a copy of the GNU General Public License
 13 * along with this program; if not, write to the Free Software
 14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 15 * 02110-1301, USA.
 16 */
 17#include <linux/io.h>
 18#include <linux/module.h>
 19#include <linux/spinlock.h>
 20#include <mach/tlmm.h>
 21#include <mach/msm_iomap.h>
 22#include <mach/gpio.h>
 23#include "tlmm-msm8660.h"
 24
 25enum msm_tlmm_register {
 26	SDC4_HDRV_PULL_CTL       = 0x20a0,
 27	SDC3_HDRV_PULL_CTL       = 0x20a4,
 28};
 29
 30struct tlmm_field_cfg {
 31	enum msm_tlmm_register reg;
 32	u8                     off;
 33};
 34
 35static struct tlmm_field_cfg tlmm_hdrv_cfgs[] = {
 36	{SDC4_HDRV_PULL_CTL, 6},       /* TLMM_HDRV_SDC4_CLK          */
 37	{SDC4_HDRV_PULL_CTL, 3},       /* TLMM_HDRV_SDC4_CMD          */
 38	{SDC4_HDRV_PULL_CTL, 0},       /* TLMM_HDRV_SDC4_DATA         */
 39	{SDC3_HDRV_PULL_CTL, 6},       /* TLMM_HDRV_SDC3_CLK          */
 40	{SDC3_HDRV_PULL_CTL, 3},       /* TLMM_HDRV_SDC3_CMD          */
 41	{SDC3_HDRV_PULL_CTL, 0},       /* TLMM_HDRV_SDC3_DATA         */
 42};
 43
 44static struct tlmm_field_cfg tlmm_pull_cfgs[] = {
 45	{SDC4_HDRV_PULL_CTL, 11},       /* TLMM_PULL_SDC4_CMD       */
 46	{SDC4_HDRV_PULL_CTL, 9},        /* TLMM_PULL_SDC4_DATA      */
 47	{SDC3_HDRV_PULL_CTL, 11},       /* TLMM_PULL_SDC3_CMD       */
 48	{SDC3_HDRV_PULL_CTL, 9},        /* TLMM_PULL_SDC3_DATA      */
 49};
 50
 51static DEFINE_SPINLOCK(tlmm_lock);
 52
 53static void msm_tlmm_set_field(struct tlmm_field_cfg *configs,
 54			unsigned               id,
 55			unsigned               width,
 56			unsigned               val)
 57{
 58	unsigned long irqflags;
 59	u32 mask = (1 << width) - 1;
 60	u32 __iomem *reg = MSM_TLMM_BASE + configs[id].reg;
 61	u32 reg_val;
 62
 63	spin_lock_irqsave(&tlmm_lock, irqflags);
 64	reg_val = readl(reg);
 65	reg_val &= ~(mask << configs[id].off);
 66	reg_val |= (val & mask) << configs[id].off;
 67	writel(reg_val, reg);
 68	spin_unlock_irqrestore(&tlmm_lock, irqflags);
 69}
 70
 71void msm_tlmm_set_hdrive(enum msm_tlmm_hdrive_tgt tgt, int drv_str)
 72{
 73	msm_tlmm_set_field(tlmm_hdrv_cfgs, tgt, 3, drv_str);
 74}
 75EXPORT_SYMBOL(msm_tlmm_set_hdrive);
 76
 77void msm_tlmm_set_pull(enum msm_tlmm_pull_tgt tgt, int pull)
 78{
 79	msm_tlmm_set_field(tlmm_pull_cfgs, tgt, 2, pull);
 80}
 81EXPORT_SYMBOL(msm_tlmm_set_pull);
 82
 83int gpio_tlmm_config(unsigned config, unsigned disable)
 84{
 85	uint32_t flags;
 86	unsigned gpio = GPIO_PIN(config);
 87
 88	if (gpio > NR_MSM_GPIOS)
 89		return -EINVAL;
 90
 91	flags = ((GPIO_DIR(config) << 9) & (0x1 << 9)) |
 92		((GPIO_DRVSTR(config) << 6) & (0x7 << 6)) |
 93		((GPIO_FUNC(config) << 2) & (0xf << 2)) |
 94		((GPIO_PULL(config) & 0x3));
 95	writel(flags, GPIO_CONFIG(gpio));
 96
 97	return 0;
 98}
 99EXPORT_SYMBOL(gpio_tlmm_config);
100
101int msm_gpio_install_direct_irq(unsigned gpio, unsigned irq)
102{
103	unsigned long irq_flags;
104
105	if (gpio >= NR_MSM_GPIOS || irq >= NR_TLMM_SCSS_DIR_CONN_IRQ)
106		return -EINVAL;
107
108	spin_lock_irqsave(&tlmm_lock, irq_flags);
109
110	writel(readl(GPIO_CONFIG(gpio)) | BIT(GPIO_OE_BIT),
111		GPIO_CONFIG(gpio));
112	writel(readl(GPIO_INTR_CFG(gpio)) &
113		~(INTR_RAW_STATUS_EN | INTR_ENABLE),
114		GPIO_INTR_CFG(gpio));
115	writel(DC_IRQ_ENABLE | TARGET_PROC_NONE,
116		GPIO_INTR_CFG_SU(gpio));
117	writel(DC_POLARITY_HI |	TARGET_PROC_SCORPION | (gpio << 3),
118		DIR_CONN_INTR_CFG_SU(irq));
119
120	spin_unlock_irqrestore(&tlmm_lock, irq_flags);
121
122	return 0;
123}
124EXPORT_SYMBOL(msm_gpio_install_direct_irq);