130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
/*
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* sm5705-muic-afc.c - SM5705 AFC micro USB switch device driver
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*
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* Copyright (C) 2014 Samsung Electronics
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* Thomas Ryu <smilesr.ryu@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/host_notify.h>
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#include <linux/muic/muic.h>
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#include <linux/muic/sm5705-muic.h>
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#if defined(CONFIG_MUIC_NOTIFIER)
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#include <linux/muic/muic_notifier.h>
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#endif /* CONFIG_MUIC_NOTIFIER */
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#if defined(CONFIG_VBUS_NOTIFIER)
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#include <linux/vbus_notifier.h>
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#endif /* CONFIG_VBUS_NOTIFIER */
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#if defined (CONFIG_OF)
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#endif /* CONFIG_OF */
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int set_afc_ctrl_reg(struct sm5705_muic_data *muic_data, int shift, bool on)
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{
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struct i2c_client *i2c = muic_data->i2c;
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u8 reg_val;
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int ret = 0;
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ret = sm5705_i2c_read_byte(i2c, SM5705_MUIC_REG_AFC_CTRL);
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if (ret < 0)
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printk(KERN_ERR "[muic] %s(%d)\n", __func__, ret);
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if (on)
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reg_val = ret | (0x1 << shift);
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else
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reg_val = ret & ~(0x1 << shift);
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if (reg_val ^ ret) {
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printk(KERN_DEBUG "[muic] %s reg_val(0x%x)!=AFC_CTRL reg(0x%x), update reg\n",
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__func__, reg_val, ret);
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ret = sm5705_i2c_write_byte(i2c, SM5705_MUIC_REG_AFC_CTRL,
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reg_val);
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if (ret < 0)
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printk(KERN_ERR "[muic] %s err write AFC_CTRL(%d)\n",
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__func__, ret);
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} else {
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printk(KERN_DEBUG "[muic] %s (0x%x), just return\n",
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__func__, ret);
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return 0;
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}
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ret = sm5705_i2c_read_byte(i2c, SM5705_MUIC_REG_AFC_CTRL);
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if (ret < 0)
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printk(KERN_ERR "[muic] %s err read AFC_CTRL(%d)\n",
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__func__, ret);
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else
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printk(KERN_DEBUG "[muic] %s AFC_CTRL reg after change(0x%x)\n",
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__func__, ret);
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return ret;
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}
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int set_afc_ctrl_enafc(struct sm5705_muic_data *muic_data, bool on)
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{
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int shift = AFC_ENAFC_SHIFT;
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int ret = 0;
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ret = set_afc_ctrl_reg(muic_data, shift, on);
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return ret;
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}
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int set_afc_vbus_read(struct sm5705_muic_data *muic_data, bool on)
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{
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int shift = AFC_VBUS_READ_SHIFT;
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int ret = 0;
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ret = set_afc_ctrl_reg(muic_data, shift, on);
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return ret;
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}
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int set_afc_dm_reset(struct sm5705_muic_data *muic_data, bool on)
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{
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int shift = AFC_DM_RESET_SHIFT;
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int ret = 0;
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ret = set_afc_ctrl_reg(muic_data, shift, on);
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return ret;
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}
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int set_afc_dp_reset(struct sm5705_muic_data *muic_data, bool on)
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{
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int shift = AFC_DP_RESET_SHIFT;
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int ret = 0;
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ret = set_afc_ctrl_reg(muic_data, shift, on);
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return ret;
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}
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