mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-09-21 20:04:01 +00:00
690a5a33c8
The SMSC 3502 HUB has only one USB UICC port. "VBAT only" single supply configuration is used. A gpio is used to control the external oscillator which supplies the ref clock to the HUB. USB UICC card is connected to this HUB on MSM8926. Provide a sysfs interface for userspace to enable/disable the HUB. This is required to save the power when a non-supported card is inserted. The HUB is disabled during boot. If the card is inserted and supports UICC, HUB is enabled by the userspace. Change-Id: Ic2b0c5bd2066a2ecae7f18aac2ab8d0bc2f075c0 Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
804 lines
19 KiB
C
804 lines
19 KiB
C
/* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
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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 version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/of_device.h>
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#include <linux/clk.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/smsc_hub.h>
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#include <linux/module.h>
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#include <mach/msm_xo.h>
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static unsigned short normal_i2c[] = {
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0, I2C_CLIENT_END };
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struct hsic_hub {
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struct device *dev;
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struct smsc_hub_platform_data *pdata;
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struct i2c_client *client;
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struct msm_xo_voter *xo_handle;
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struct clk *ref_clk;
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struct regulator *hsic_hub_reg;
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struct regulator *int_pad_reg, *hub_vbus_reg;
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bool enabled;
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};
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static struct hsic_hub *smsc_hub;
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static struct platform_driver smsc_hub_driver;
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/* APIs for setting/clearing bits and for reading/writing values */
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static inline int hsic_hub_get_u8(struct i2c_client *client, u8 reg)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0)
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pr_err("%s:i2c_read8 failed\n", __func__);
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return ret;
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}
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static inline int hsic_hub_get_u16(struct i2c_client *client, u8 reg)
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{
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int ret;
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ret = i2c_smbus_read_word_data(client, reg);
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if (ret < 0)
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pr_err("%s:i2c_read16 failed\n", __func__);
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return ret;
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}
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static inline int hsic_hub_write_word_data(struct i2c_client *client, u8 reg,
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u16 value)
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{
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int ret;
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ret = i2c_smbus_write_word_data(client, reg, value);
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if (ret)
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pr_err("%s:i2c_write16 failed\n", __func__);
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return ret;
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}
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static inline int hsic_hub_write_byte_data(struct i2c_client *client, u8 reg,
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u8 value)
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{
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int ret;
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ret = i2c_smbus_write_byte_data(client, reg, value);
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if (ret)
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pr_err("%s:i2c_write_byte_data failed\n", __func__);
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return ret;
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}
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static inline int hsic_hub_set_bits(struct i2c_client *client, u8 reg,
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u8 value)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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pr_err("%s:i2c_read_byte_data failed\n", __func__);
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return ret;
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}
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return i2c_smbus_write_byte_data(client, reg, (ret | value));
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}
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static inline int hsic_hub_clear_bits(struct i2c_client *client, u8 reg,
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u8 value)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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pr_err("%s:i2c_read_byte_data failed\n", __func__);
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return ret;
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}
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return i2c_smbus_write_byte_data(client, reg, (ret & ~value));
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}
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static int smsc4604_send_connect_cmd(struct i2c_client *client)
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{
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u8 buf[3];
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buf[0] = 0xAA;
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buf[1] = 0x55;
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buf[2] = 0x00;
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if (i2c_master_send(client, buf, 3) != 3) {
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dev_err(&client->dev, "%s: i2c send failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static int i2c_hsic_hub_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
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I2C_FUNC_SMBUS_WORD_DATA))
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return -EIO;
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switch (smsc_hub->pdata->model_id) {
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case SMSC3503_ID:
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/*
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* CONFIG_N bit in SP_ILOCK register has to be set before
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* changing other registers to change default configuration
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* of hsic hub.
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*/
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hsic_hub_set_bits(client, SMSC3503_SP_ILOCK, CONFIG_N);
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/*
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* Can change default configuartion like VID,PID,
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* strings etc by writing new values to hsic hub registers
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*/
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hsic_hub_write_word_data(client, SMSC3503_VENDORID, 0x05C6);
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/*
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* CONFIG_N bit in SP_ILOCK register has to be cleared
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* for new values in registers to be effective after
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* writing to other registers.
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*/
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hsic_hub_clear_bits(client, SMSC3503_SP_ILOCK, CONFIG_N);
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break;
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case SMSC4604_ID:
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/*
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* SMSC4604 requires an I2C attach command to be issued
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* if I2C bus is connected
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*/
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return smsc4604_send_connect_cmd(client);
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int i2c_hsic_hub_remove(struct i2c_client *client)
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{
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return 0;
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}
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static const struct i2c_device_id hsic_hub_id[] = {
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{"i2c_hsic_hub", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, hsichub_id);
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static struct i2c_driver hsic_hub_driver = {
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.driver = {
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.name = "i2c_hsic_hub",
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},
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.probe = i2c_hsic_hub_probe,
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.remove = i2c_hsic_hub_remove,
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.id_table = hsic_hub_id,
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};
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static int msm_hsic_hub_init_clock(struct hsic_hub *hub, int init)
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{
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int ret;
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/*
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* xo_clk_gpio controls an external xo clock which feeds
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* the hub reference clock. When this gpio is present,
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* assume that no other clocks are required.
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*/
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if (hub->pdata->xo_clk_gpio)
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return 0;
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if (!init) {
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if (!IS_ERR(hub->ref_clk))
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clk_disable_unprepare(hub->ref_clk);
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else
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msm_xo_put(smsc_hub->xo_handle);
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return 0;
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}
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hub->ref_clk = devm_clk_get(hub->dev, "ref_clk");
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if (IS_ERR(hub->ref_clk)) {
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dev_dbg(hub->dev, "failed to get ref_clk\n");
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/* In the absence of dedicated ref_clk, xo clocks the HUB */
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smsc_hub->xo_handle = msm_xo_get(MSM_XO_TCXO_D1, "hsic_hub");
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if (IS_ERR(smsc_hub->xo_handle)) {
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dev_err(hub->dev, "not able to get the handle\n"
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"for TCXO D1 buffer\n");
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return PTR_ERR(smsc_hub->xo_handle);
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}
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ret = msm_xo_mode_vote(smsc_hub->xo_handle, MSM_XO_MODE_ON);
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if (ret) {
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dev_err(hub->dev, "failed to vote for TCXO\n"
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"D1 buffer\n");
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msm_xo_put(smsc_hub->xo_handle);
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return ret;
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}
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} else {
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ret = clk_prepare_enable(hub->ref_clk);
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if (ret)
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dev_err(hub->dev, "clk_enable failed for ref_clk\n");
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}
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return ret;
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}
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#define HSIC_HUB_INT_VOL_MIN 1800000 /* uV */
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#define HSIC_HUB_INT_VOL_MAX 2950000 /* uV */
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static int msm_hsic_hub_init_gpio(struct hsic_hub *hub, int init)
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{
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int ret;
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struct smsc_hub_platform_data *pdata = hub->pdata;
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if (!init) {
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if (!IS_ERR(smsc_hub->int_pad_reg)) {
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regulator_disable(smsc_hub->int_pad_reg);
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regulator_set_voltage(smsc_hub->int_pad_reg, 0,
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HSIC_HUB_INT_VOL_MAX);
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}
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return 0;
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}
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ret = devm_gpio_request(hub->dev, pdata->hub_reset, "HSIC_HUB_RESET");
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if (ret < 0) {
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dev_err(hub->dev, "gpio request failed for GPIO%d\n",
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pdata->hub_reset);
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return ret;
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}
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if (pdata->refclk_gpio) {
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ret = devm_gpio_request(hub->dev, pdata->refclk_gpio,
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"HSIC_HUB_CLK");
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if (ret < 0)
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dev_err(hub->dev, "gpio request failed (CLK GPIO)\n");
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}
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if (pdata->xo_clk_gpio) {
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ret = devm_gpio_request(hub->dev, pdata->xo_clk_gpio,
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"HSIC_HUB_XO_CLK");
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if (ret < 0) {
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dev_err(hub->dev, "gpio request failed(XO CLK GPIO)\n");
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return ret;
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}
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}
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if (pdata->int_gpio) {
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ret = devm_gpio_request(hub->dev, pdata->int_gpio,
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"HSIC_HUB_INT");
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if (ret < 0) {
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dev_err(hub->dev, "gpio request failed (INT GPIO)\n");
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return ret;
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}
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/* Enable LDO if required for external pull-up */
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smsc_hub->int_pad_reg = devm_regulator_get(hub->dev, "hub-int");
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if (IS_ERR(smsc_hub->int_pad_reg)) {
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dev_dbg(hub->dev, "unable to get ext hub_int reg\n");
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} else {
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ret = regulator_set_voltage(smsc_hub->int_pad_reg,
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HSIC_HUB_INT_VOL_MIN,
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HSIC_HUB_INT_VOL_MAX);
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if (ret) {
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dev_err(hub->dev, "unable to set the voltage\n"
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" for hsic hub int reg\n");
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return ret;
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}
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ret = regulator_enable(smsc_hub->int_pad_reg);
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if (ret) {
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dev_err(hub->dev, "unable to enable int reg\n");
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regulator_set_voltage(smsc_hub->int_pad_reg, 0,
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HSIC_HUB_INT_VOL_MAX);
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return ret;
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}
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}
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}
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return 0;
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}
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#define HSIC_HUB_VDD_VOL_MIN 1650000 /* uV */
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#define HSIC_HUB_VDD_VOL_MAX 1950000 /* uV */
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#define HSIC_HUB_VDD_LOAD 36000 /* uA */
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static int msm_hsic_hub_init_vdd(struct hsic_hub *hub, int init)
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{
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int ret;
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if (!of_get_property(hub->dev->of_node, "ext-hub-vddio-supply", NULL))
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return 0;
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if (!init) {
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if (!IS_ERR(smsc_hub->hsic_hub_reg)) {
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regulator_disable(smsc_hub->hsic_hub_reg);
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regulator_set_optimum_mode(smsc_hub->hsic_hub_reg, 0);
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regulator_set_voltage(smsc_hub->hsic_hub_reg, 0,
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HSIC_HUB_VDD_VOL_MAX);
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}
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return 0;
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}
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smsc_hub->hsic_hub_reg = devm_regulator_get(hub->dev, "ext-hub-vddio");
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if (IS_ERR(smsc_hub->hsic_hub_reg)) {
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dev_dbg(hub->dev, "unable to get ext hub vddcx\n");
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} else {
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ret = regulator_set_voltage(smsc_hub->hsic_hub_reg,
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HSIC_HUB_VDD_VOL_MIN,
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HSIC_HUB_VDD_VOL_MAX);
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if (ret) {
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dev_err(hub->dev, "unable to set the voltage\n"
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"for hsic hub reg\n");
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return ret;
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}
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ret = regulator_set_optimum_mode(smsc_hub->hsic_hub_reg,
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HSIC_HUB_VDD_LOAD);
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if (ret < 0) {
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dev_err(hub->dev, "Unable to set mode of VDDCX\n");
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goto reg_optimum_mode_fail;
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}
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ret = regulator_enable(smsc_hub->hsic_hub_reg);
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if (ret) {
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dev_err(hub->dev, "unable to enable ext hub vddcx\n");
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goto reg_enable_fail;
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}
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}
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return 0;
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reg_enable_fail:
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regulator_set_optimum_mode(smsc_hub->hsic_hub_reg, 0);
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reg_optimum_mode_fail:
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regulator_set_voltage(smsc_hub->hsic_hub_reg, 0,
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HSIC_HUB_VDD_VOL_MAX);
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return ret;
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}
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static int smsc_hub_enable(struct hsic_hub *hub)
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{
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struct smsc_hub_platform_data *pdata = hub->pdata;
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struct of_dev_auxdata *hsic_host_auxdata = dev_get_platdata(hub->dev);
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struct device_node *node = hub->dev->of_node;
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int ret;
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ret = gpio_direction_output(pdata->xo_clk_gpio, 1);
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if (ret < 0) {
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dev_err(hub->dev, "fail to enable xo clk\n");
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return ret;
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}
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ret = gpio_direction_output(pdata->hub_reset, 0);
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if (ret < 0) {
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dev_err(hub->dev, "fail to assert reset\n");
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goto disable_xo;
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}
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udelay(5);
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ret = gpio_direction_output(pdata->hub_reset, 1);
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if (ret < 0) {
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dev_err(hub->dev, "fail to de-assert reset\n");
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goto disable_xo;
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}
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ret = of_platform_populate(node, NULL, hsic_host_auxdata,
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hub->dev);
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if (ret < 0) {
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dev_err(smsc_hub->dev, "fail to add child with %d\n",
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ret);
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goto reset;
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}
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pm_runtime_allow(hub->dev);
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reset:
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gpio_direction_output(pdata->hub_reset, 0);
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disable_xo:
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gpio_direction_output(pdata->xo_clk_gpio, 0);
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return ret;
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}
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static int sms_hub_remove_child(struct device *dev, void *data)
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{
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struct platform_device *pdev = to_platform_device(dev);
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/*
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* Runtime PM is disabled before the driver's remove method
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* is called. So resume the device before unregistering
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* the device. Don't worry about the PM usage counter as
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* the device will be freed.
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*/
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pm_runtime_get_sync(dev);
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of_device_unregister(pdev);
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return 0;
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}
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static int smsc_hub_disable(struct hsic_hub *hub)
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{
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struct smsc_hub_platform_data *pdata = hub->pdata;
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pm_runtime_forbid(hub->dev);
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device_for_each_child(hub->dev, NULL, sms_hub_remove_child);
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gpio_direction_output(pdata->hub_reset, 0);
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gpio_direction_output(pdata->xo_clk_gpio, 0);
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return 0;
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}
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static ssize_t smsc_hub_enable_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%s\n", smsc_hub->enabled ?
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"enabled" : "disabled");
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}
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static ssize_t smsc_hub_enable_store(struct device *dev,
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struct device_attribute *attr, const char
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*buf, size_t size)
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{
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bool enable;
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int val;
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int ret = size;
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if (sscanf(buf, "%d", &val) == 1) {
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enable = !!val;
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} else {
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ret = -EINVAL;
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goto out;
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}
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if (smsc_hub->enabled == enable)
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goto out;
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if (enable)
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ret = smsc_hub_enable(smsc_hub);
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else
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ret = smsc_hub_disable(smsc_hub);
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pr_debug("smsc hub %s status %d\n", enable ?
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"Enable" : "Disable", ret);
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if (!ret) {
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ret = size;
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smsc_hub->enabled = enable;
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}
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out:
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return ret;
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}
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static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, smsc_hub_enable_show,
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smsc_hub_enable_store);
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struct smsc_hub_platform_data *msm_hub_dt_to_pdata(
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struct platform_device *pdev)
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{
|
|
int rc;
|
|
u32 temp_val;
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct smsc_hub_platform_data *pdata;
|
|
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "unable to allocate platform data\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
rc = of_property_read_u32(node, "smsc,model-id", &temp_val);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "Unable to read smsc,model-id\n");
|
|
return ERR_PTR(rc);
|
|
} else {
|
|
pdata->model_id = temp_val;
|
|
if (pdata->model_id == 0)
|
|
return pdata;
|
|
}
|
|
|
|
pdata->hub_reset = of_get_named_gpio(node, "smsc,reset-gpio", 0);
|
|
if (pdata->hub_reset < 0)
|
|
return ERR_PTR(pdata->hub_reset);
|
|
|
|
pdata->refclk_gpio = of_get_named_gpio(node, "smsc,refclk-gpio", 0);
|
|
if (pdata->refclk_gpio < 0)
|
|
pdata->refclk_gpio = 0;
|
|
|
|
pdata->int_gpio = of_get_named_gpio(node, "smsc,int-gpio", 0);
|
|
if (pdata->int_gpio < 0)
|
|
pdata->int_gpio = 0;
|
|
|
|
pdata->xo_clk_gpio = of_get_named_gpio(node, "smsc,xo-clk-gpio", 0);
|
|
if (pdata->xo_clk_gpio < 0)
|
|
pdata->xo_clk_gpio = 0;
|
|
|
|
return pdata;
|
|
}
|
|
|
|
static int smsc_hub_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
struct smsc_hub_platform_data *pdata;
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct i2c_adapter *i2c_adap;
|
|
struct i2c_board_info i2c_info;
|
|
struct of_dev_auxdata *hsic_host_auxdata = NULL;
|
|
|
|
if (pdev->dev.of_node) {
|
|
dev_dbg(&pdev->dev, "device tree enabled\n");
|
|
hsic_host_auxdata = dev_get_platdata(&pdev->dev);
|
|
pdata = msm_hub_dt_to_pdata(pdev);
|
|
if (IS_ERR(pdata))
|
|
return PTR_ERR(pdata);
|
|
} else {
|
|
pdata = pdev->dev.platform_data;
|
|
}
|
|
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "No platform data\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (pdata->model_id == 0) {
|
|
dev_dbg(&pdev->dev, "standalone HSIC config enabled\n");
|
|
return of_platform_populate(node, NULL,
|
|
hsic_host_auxdata, &pdev->dev);
|
|
}
|
|
|
|
if (!pdata->hub_reset)
|
|
return -EINVAL;
|
|
|
|
smsc_hub = devm_kzalloc(&pdev->dev, sizeof(*smsc_hub), GFP_KERNEL);
|
|
if (!smsc_hub)
|
|
return -ENOMEM;
|
|
|
|
smsc_hub->dev = &pdev->dev;
|
|
smsc_hub->pdata = pdata;
|
|
|
|
if (of_get_property(pdev->dev.of_node, "hub-vbus-supply", NULL)) {
|
|
smsc_hub->hub_vbus_reg = devm_regulator_get(&pdev->dev,
|
|
"hub-vbus");
|
|
ret = PTR_ERR(smsc_hub->hub_vbus_reg);
|
|
if (ret == -EPROBE_DEFER) {
|
|
dev_dbg(&pdev->dev, "failed to get hub_vbus\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = msm_hsic_hub_init_vdd(smsc_hub, 1);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to init hub VDD\n");
|
|
return ret;
|
|
}
|
|
ret = msm_hsic_hub_init_clock(smsc_hub, 1);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to init hub clock\n");
|
|
goto uninit_vdd;
|
|
}
|
|
ret = msm_hsic_hub_init_gpio(smsc_hub, 1);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to init hub gpios\n");
|
|
goto uninit_clock;
|
|
}
|
|
|
|
if (pdata->model_id == SMSC3502_ID) {
|
|
ret = device_create_file(&pdev->dev, &dev_attr_enable);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "fail to create sysfs file\n");
|
|
goto uninit_gpio;
|
|
}
|
|
pm_runtime_forbid(&pdev->dev);
|
|
goto done;
|
|
}
|
|
|
|
gpio_direction_output(pdata->hub_reset, 0);
|
|
/*
|
|
* Hub reset should be asserted for minimum 2microsec
|
|
* before deasserting.
|
|
*/
|
|
udelay(5);
|
|
gpio_direction_output(pdata->hub_reset, 1);
|
|
|
|
if (!IS_ERR_OR_NULL(smsc_hub->hub_vbus_reg)) {
|
|
ret = regulator_enable(smsc_hub->hub_vbus_reg);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "unable to enable hub_vbus\n");
|
|
goto uninit_gpio;
|
|
}
|
|
}
|
|
|
|
ret = i2c_add_driver(&hsic_hub_driver);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "failed to add I2C hsic_hub_driver\n");
|
|
goto i2c_add_fail;
|
|
}
|
|
usleep_range(10000, 12000);
|
|
i2c_adap = i2c_get_adapter(SMSC_GSBI_I2C_BUS_ID);
|
|
|
|
if (!i2c_adap) {
|
|
dev_err(&pdev->dev, "failed to get i2c adapter\n");
|
|
i2c_del_driver(&hsic_hub_driver);
|
|
goto i2c_add_fail;
|
|
}
|
|
|
|
memset(&i2c_info, 0, sizeof(struct i2c_board_info));
|
|
strlcpy(i2c_info.type, "i2c_hsic_hub", I2C_NAME_SIZE);
|
|
|
|
/* 250ms delay is required for SMSC4604 HUB to get I2C up */
|
|
msleep(250);
|
|
|
|
/* Assign I2C slave address per SMSC model */
|
|
switch (pdata->model_id) {
|
|
case SMSC3503_ID:
|
|
normal_i2c[0] = SMSC3503_I2C_ADDR;
|
|
break;
|
|
case SMSC4604_ID:
|
|
normal_i2c[0] = SMSC4604_I2C_ADDR;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "unsupported SMSC model-id\n");
|
|
i2c_put_adapter(i2c_adap);
|
|
i2c_del_driver(&hsic_hub_driver);
|
|
goto uninit_gpio;
|
|
}
|
|
|
|
smsc_hub->client = i2c_new_probed_device(i2c_adap, &i2c_info,
|
|
normal_i2c, NULL);
|
|
i2c_put_adapter(i2c_adap);
|
|
|
|
i2c_add_fail:
|
|
ret = of_platform_populate(node, NULL, hsic_host_auxdata, &pdev->dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to add child node, ret=%d\n", ret);
|
|
goto uninit_gpio;
|
|
}
|
|
|
|
smsc_hub->enabled = true;
|
|
|
|
if (!smsc_hub->client)
|
|
dev_err(&pdev->dev,
|
|
"failed to connect to smsc_hub through I2C\n");
|
|
|
|
done:
|
|
pm_runtime_set_active(&pdev->dev);
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
uninit_gpio:
|
|
msm_hsic_hub_init_gpio(smsc_hub, 0);
|
|
uninit_clock:
|
|
msm_hsic_hub_init_clock(smsc_hub, 0);
|
|
uninit_vdd:
|
|
msm_hsic_hub_init_vdd(smsc_hub, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int smsc_hub_remove(struct platform_device *pdev)
|
|
{
|
|
const struct smsc_hub_platform_data *pdata;
|
|
|
|
if (!smsc_hub)
|
|
return 0;
|
|
|
|
pdata = smsc_hub->pdata;
|
|
if (pdata->model_id == SMSC3502_ID)
|
|
device_remove_file(&pdev->dev, &dev_attr_enable);
|
|
if (smsc_hub->client) {
|
|
i2c_unregister_device(smsc_hub->client);
|
|
smsc_hub->client = NULL;
|
|
i2c_del_driver(&hsic_hub_driver);
|
|
}
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
if (!IS_ERR_OR_NULL(smsc_hub->hub_vbus_reg))
|
|
regulator_disable(smsc_hub->hub_vbus_reg);
|
|
msm_hsic_hub_init_gpio(smsc_hub, 0);
|
|
msm_hsic_hub_init_clock(smsc_hub, 0);
|
|
msm_hsic_hub_init_vdd(smsc_hub, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_RUNTIME
|
|
static int msm_smsc_runtime_idle(struct device *dev)
|
|
{
|
|
dev_dbg(dev, "SMSC HUB runtime idle\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smsc_hub_lpm_enter(struct device *dev)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!smsc_hub || !smsc_hub->enabled)
|
|
return 0;
|
|
|
|
if (smsc_hub->xo_handle) {
|
|
ret = msm_xo_mode_vote(smsc_hub->xo_handle, MSM_XO_MODE_OFF);
|
|
if (ret) {
|
|
pr_err("%s: failed to devote for TCXO\n"
|
|
"D1 buffer%d\n", __func__, ret);
|
|
}
|
|
} else if (smsc_hub->pdata->xo_clk_gpio) {
|
|
gpio_direction_output(smsc_hub->pdata->xo_clk_gpio, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int smsc_hub_lpm_exit(struct device *dev)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!smsc_hub || !smsc_hub->enabled)
|
|
return 0;
|
|
|
|
if (smsc_hub->xo_handle) {
|
|
ret = msm_xo_mode_vote(smsc_hub->xo_handle, MSM_XO_MODE_ON);
|
|
if (ret) {
|
|
pr_err("%s: failed to vote for TCXO\n"
|
|
"D1 buffer%d\n", __func__, ret);
|
|
}
|
|
} else if (smsc_hub->pdata->xo_clk_gpio) {
|
|
gpio_direction_output(smsc_hub->pdata->xo_clk_gpio, 1);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
static const struct dev_pm_ops smsc_hub_dev_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(smsc_hub_lpm_enter, smsc_hub_lpm_exit)
|
|
SET_RUNTIME_PM_OPS(smsc_hub_lpm_enter, smsc_hub_lpm_exit,
|
|
msm_smsc_runtime_idle)
|
|
};
|
|
#endif
|
|
|
|
static const struct of_device_id hsic_hub_dt_match[] = {
|
|
{ .compatible = "qcom,hsic-smsc-hub",
|
|
},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, hsic_hub_dt_match);
|
|
|
|
static struct platform_driver smsc_hub_driver = {
|
|
.driver = {
|
|
.name = "msm_smsc_hub",
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_PM
|
|
.pm = &smsc_hub_dev_pm_ops,
|
|
#endif
|
|
.of_match_table = hsic_hub_dt_match,
|
|
},
|
|
.probe = smsc_hub_probe,
|
|
.remove = smsc_hub_remove,
|
|
};
|
|
|
|
static int __init smsc_hub_init(void)
|
|
{
|
|
return platform_driver_register(&smsc_hub_driver);
|
|
}
|
|
|
|
static void __exit smsc_hub_exit(void)
|
|
{
|
|
platform_driver_unregister(&smsc_hub_driver);
|
|
}
|
|
subsys_initcall(smsc_hub_init);
|
|
module_exit(smsc_hub_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("SMSC HSIC HUB driver");
|