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e6b5be2be4
linux-next/drivers/usb/phy/phy-ab8500-usb.c
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1 
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 Version: GnuPG v2
 
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 53kAoLeteByQ3iVwWurwwseRPiWa8+MI
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00

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/*
* USB transceiver driver for AB8500 family chips
*
* Copyright (C) 2010-2013 ST-Ericsson AB
* Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
* Avinash Kumar <avinash.kumar@stericsson.com>
* Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/usb/otg.h>
#include <linux/slab.h>
#include <linux/notifier.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/usb/musb-ux500.h>
#include <linux/regulator/consumer.h>
#include <linux/pinctrl/consumer.h>
/* Bank AB8500_SYS_CTRL2_BLOCK */
#define AB8500_MAIN_WD_CTRL_REG 0x01
/* Bank AB8500_USB */
#define AB8500_USB_LINE_STAT_REG 0x80
#define AB8505_USB_LINE_STAT_REG 0x94
#define AB8540_USB_LINK_STAT_REG 0x94
#define AB9540_USB_LINK_STAT_REG 0x94
#define AB8540_USB_OTG_CTL_REG 0x87
#define AB8500_USB_PHY_CTRL_REG 0x8A
#define AB8540_VBUS_CTRL_REG 0x82
/* Bank AB8500_DEVELOPMENT */
#define AB8500_BANK12_ACCESS 0x00
/* Bank AB8500_DEBUG */
#define AB8540_DEBUG 0x32
#define AB8500_USB_PHY_TUNE1 0x05
#define AB8500_USB_PHY_TUNE2 0x06
#define AB8500_USB_PHY_TUNE3 0x07
/* Bank AB8500_INTERRUPT */
#define AB8500_IT_SOURCE2_REG 0x01
#define AB8500_BIT_OTG_STAT_ID (1 << 0)
#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)
#define AB8500_BIT_WD_CTRL_KICK (1 << 1)
#define AB8500_BIT_SOURCE2_VBUSDET (1 << 7)
#define AB8540_BIT_OTG_CTL_VBUS_VALID_ENA (1 << 0)
#define AB8540_BIT_OTG_CTL_ID_HOST_ENA (1 << 1)
#define AB8540_BIT_OTG_CTL_ID_DEV_ENA (1 << 5)
#define AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA (1 << 0)
#define AB8500_WD_KICK_DELAY_US 100 /* usec */
#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */
#define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */
/* Usb line status register */
enum ab8500_usb_link_status {
USB_LINK_NOT_CONFIGURED_8500 = 0,
USB_LINK_STD_HOST_NC_8500,
USB_LINK_STD_HOST_C_NS_8500,
USB_LINK_STD_HOST_C_S_8500,
USB_LINK_HOST_CHG_NM_8500,
USB_LINK_HOST_CHG_HS_8500,
USB_LINK_HOST_CHG_HS_CHIRP_8500,
USB_LINK_DEDICATED_CHG_8500,
USB_LINK_ACA_RID_A_8500,
USB_LINK_ACA_RID_B_8500,
USB_LINK_ACA_RID_C_NM_8500,
USB_LINK_ACA_RID_C_HS_8500,
USB_LINK_ACA_RID_C_HS_CHIRP_8500,
USB_LINK_HM_IDGND_8500,
USB_LINK_RESERVED_8500,
USB_LINK_NOT_VALID_LINK_8500,
};
enum ab8505_usb_link_status {
USB_LINK_NOT_CONFIGURED_8505 = 0,
USB_LINK_STD_HOST_NC_8505,
USB_LINK_STD_HOST_C_NS_8505,
USB_LINK_STD_HOST_C_S_8505,
USB_LINK_CDP_8505,
USB_LINK_RESERVED0_8505,
USB_LINK_RESERVED1_8505,
USB_LINK_DEDICATED_CHG_8505,
USB_LINK_ACA_RID_A_8505,
USB_LINK_ACA_RID_B_8505,
USB_LINK_ACA_RID_C_NM_8505,
USB_LINK_RESERVED2_8505,
USB_LINK_RESERVED3_8505,
USB_LINK_HM_IDGND_8505,
USB_LINK_CHARGERPORT_NOT_OK_8505,
USB_LINK_CHARGER_DM_HIGH_8505,
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505,
USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505,
USB_LINK_STD_UPSTREAM_8505,
USB_LINK_CHARGER_SE1_8505,
USB_LINK_CARKIT_CHGR_1_8505,
USB_LINK_CARKIT_CHGR_2_8505,
USB_LINK_ACA_DOCK_CHGR_8505,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505,
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505,
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505,
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505,
};
enum ab8540_usb_link_status {
USB_LINK_NOT_CONFIGURED_8540 = 0,
USB_LINK_STD_HOST_NC_8540,
USB_LINK_STD_HOST_C_NS_8540,
USB_LINK_STD_HOST_C_S_8540,
USB_LINK_CDP_8540,
USB_LINK_RESERVED0_8540,
USB_LINK_RESERVED1_8540,
USB_LINK_DEDICATED_CHG_8540,
USB_LINK_ACA_RID_A_8540,
USB_LINK_ACA_RID_B_8540,
USB_LINK_ACA_RID_C_NM_8540,
USB_LINK_RESERVED2_8540,
USB_LINK_RESERVED3_8540,
USB_LINK_HM_IDGND_8540,
USB_LINK_CHARGERPORT_NOT_OK_8540,
USB_LINK_CHARGER_DM_HIGH_8540,
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540,
USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540,
USB_LINK_STD_UPSTREAM_8540,
USB_LINK_CHARGER_SE1_8540,
USB_LINK_CARKIT_CHGR_1_8540,
USB_LINK_CARKIT_CHGR_2_8540,
USB_LINK_ACA_DOCK_CHGR_8540,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8540,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8540,
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8540,
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8540,
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8540
};
enum ab9540_usb_link_status {
USB_LINK_NOT_CONFIGURED_9540 = 0,
USB_LINK_STD_HOST_NC_9540,
USB_LINK_STD_HOST_C_NS_9540,
USB_LINK_STD_HOST_C_S_9540,
USB_LINK_CDP_9540,
USB_LINK_RESERVED0_9540,
USB_LINK_RESERVED1_9540,
USB_LINK_DEDICATED_CHG_9540,
USB_LINK_ACA_RID_A_9540,
USB_LINK_ACA_RID_B_9540,
USB_LINK_ACA_RID_C_NM_9540,
USB_LINK_RESERVED2_9540,
USB_LINK_RESERVED3_9540,
USB_LINK_HM_IDGND_9540,
USB_LINK_CHARGERPORT_NOT_OK_9540,
USB_LINK_CHARGER_DM_HIGH_9540,
USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540,
USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540,
USB_LINK_STD_UPSTREAM_9540,
USB_LINK_CHARGER_SE1_9540,
USB_LINK_CARKIT_CHGR_1_9540,
USB_LINK_CARKIT_CHGR_2_9540,
USB_LINK_ACA_DOCK_CHGR_9540,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_9540,
USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_9540,
USB_LINK_SAMSUNG_UART_CBL_PHY_EN_9540,
USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_9540,
USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_9540
};
enum ab8500_usb_mode {
USB_IDLE = 0,
USB_PERIPHERAL,
USB_HOST,
USB_DEDICATED_CHG
};
/* Register USB_LINK_STATUS interrupt */
#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ (1 << 0)
/* Register ID_WAKEUP_F interrupt */
#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ (1 << 1)
/* Register VBUS_DET_F interrupt */
#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ (1 << 2)
/* Driver is using the ab-iddet driver*/
#define AB8500_USB_FLAG_USE_AB_IDDET (1 << 3)
/* Enable setting regulators voltage */
#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE (1 << 4)
/* Enable the check_vbus_status workaround */
#define AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS (1 << 5)
/* Enable the vbus host workaround */
#define AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK (1 << 6)
struct ab8500_usb {
struct usb_phy phy;
struct device *dev;
struct ab8500 *ab8500;
unsigned vbus_draw;
struct work_struct phy_dis_work;
struct work_struct vbus_event_work;
enum ab8500_usb_mode mode;
struct clk *sysclk;
struct regulator *v_ape;
struct regulator *v_musb;
struct regulator *v_ulpi;
int saved_v_ulpi;
int previous_link_status_state;
struct pinctrl *pinctrl;
struct pinctrl_state *pins_sleep;
bool enabled_charging_detection;
unsigned int flags;
};
static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
{
return container_of(x, struct ab8500_usb, phy);
}
static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
{
abx500_set_register_interruptible(ab->dev,
AB8500_SYS_CTRL2_BLOCK,
AB8500_MAIN_WD_CTRL_REG,
AB8500_BIT_WD_CTRL_ENABLE);
udelay(AB8500_WD_KICK_DELAY_US);
abx500_set_register_interruptible(ab->dev,
AB8500_SYS_CTRL2_BLOCK,
AB8500_MAIN_WD_CTRL_REG,
(AB8500_BIT_WD_CTRL_ENABLE
| AB8500_BIT_WD_CTRL_KICK));
udelay(AB8500_WD_V11_DISABLE_DELAY_US);
abx500_set_register_interruptible(ab->dev,
AB8500_SYS_CTRL2_BLOCK,
AB8500_MAIN_WD_CTRL_REG,
0);
}
static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
{
int ret, volt;
ret = regulator_enable(ab->v_ape);
if (ret)
dev_err(ab->dev, "Failed to enable v-ape\n");
if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi);
if (ab->saved_v_ulpi < 0)
dev_err(ab->dev, "Failed to get v_ulpi voltage\n");
ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000);
if (ret < 0)
dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n",
ret);
ret = regulator_set_optimum_mode(ab->v_ulpi, 28000);
if (ret < 0)
dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
ret);
}
ret = regulator_enable(ab->v_ulpi);
if (ret)
dev_err(ab->dev, "Failed to enable vddulpivio18\n");
if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
volt = regulator_get_voltage(ab->v_ulpi);
if ((volt != 1300000) && (volt != 1350000))
dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n",
volt);
}
ret = regulator_enable(ab->v_musb);
if (ret)
dev_err(ab->dev, "Failed to enable musb_1v8\n");
}
static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
{
int ret;
regulator_disable(ab->v_musb);
regulator_disable(ab->v_ulpi);
/* USB is not the only consumer of Vintcore, restore old settings */
if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
if (ab->saved_v_ulpi > 0) {
ret = regulator_set_voltage(ab->v_ulpi,
ab->saved_v_ulpi, ab->saved_v_ulpi);
if (ret < 0)
dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n",
ab->saved_v_ulpi, ret);
}
ret = regulator_set_optimum_mode(ab->v_ulpi, 0);
if (ret < 0)
dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
ret);
}
regulator_disable(ab->v_ape);
}
static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit)
{
/* Workaround for v2.0 bug # 31952 */
if (is_ab8500_2p0(ab->ab8500)) {
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
bit, bit);
udelay(AB8500_V20_31952_DISABLE_DELAY_US);
}
}
static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host)
{
u8 bit;
bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
AB8500_BIT_PHY_CTRL_DEVICE_EN;
/* mux and configure USB pins to DEFAULT state */
ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT);
if (IS_ERR(ab->pinctrl))
dev_err(ab->dev, "could not get/set default pinstate\n");
if (clk_prepare_enable(ab->sysclk))
dev_err(ab->dev, "can't prepare/enable clock\n");
ab8500_usb_regulator_enable(ab);
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
bit, bit);
if (ab->flags & AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK) {
if (sel_host)
abx500_set_register_interruptible(ab->dev,
AB8500_USB, AB8540_USB_OTG_CTL_REG,
AB8540_BIT_OTG_CTL_VBUS_VALID_ENA |
AB8540_BIT_OTG_CTL_ID_HOST_ENA |
AB8540_BIT_OTG_CTL_ID_DEV_ENA);
}
}
static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
{
u8 bit;
bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
AB8500_BIT_PHY_CTRL_DEVICE_EN;
ab8500_usb_wd_linkstatus(ab, bit);
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
bit, 0);
/* Needed to disable the phy.*/
ab8500_usb_wd_workaround(ab);
clk_disable_unprepare(ab->sysclk);
ab8500_usb_regulator_disable(ab);
if (!IS_ERR(ab->pinctrl)) {
/* configure USB pins to SLEEP state */
ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl,
PINCTRL_STATE_SLEEP);
if (IS_ERR(ab->pins_sleep))
dev_dbg(ab->dev, "could not get sleep pinstate\n");
else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep))
dev_err(ab->dev, "could not set pins to sleep state\n");
/*
* as USB pins are shared with iddet, release them to allow
* iddet to request them
*/
pinctrl_put(ab->pinctrl);
}
}
#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true)
#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true)
#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false)
#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false)
static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
enum ab9540_usb_link_status lsts)
{
enum ux500_musb_vbus_id_status event = 0;
dev_dbg(ab->dev, "ab9540_usb_link_status_update %d\n", lsts);
if (ab->previous_link_status_state == USB_LINK_HM_IDGND_9540 &&
(lsts == USB_LINK_STD_HOST_C_NS_9540 ||
lsts == USB_LINK_STD_HOST_NC_9540))
return 0;
if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_9540 &&
(lsts == USB_LINK_STD_HOST_NC_9540))
return 0;
ab->previous_link_status_state = lsts;
switch (lsts) {
case USB_LINK_ACA_RID_B_9540:
event = UX500_MUSB_RIDB;
case USB_LINK_NOT_CONFIGURED_9540:
case USB_LINK_RESERVED0_9540:
case USB_LINK_RESERVED1_9540:
case USB_LINK_RESERVED2_9540:
case USB_LINK_RESERVED3_9540:
if (ab->mode == USB_PERIPHERAL)
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_CLEAN, &ab->vbus_draw);
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
if (event != UX500_MUSB_RIDB)
event = UX500_MUSB_NONE;
/* Fallback to default B_IDLE as nothing is connected. */
ab->phy.otg->state = OTG_STATE_B_IDLE;
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
break;
case USB_LINK_ACA_RID_C_NM_9540:
event = UX500_MUSB_RIDC;
case USB_LINK_STD_HOST_NC_9540:
case USB_LINK_STD_HOST_C_NS_9540:
case USB_LINK_STD_HOST_C_S_9540:
case USB_LINK_CDP_9540:
if (ab->mode == USB_HOST) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_host_phy_dis(ab);
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
}
if (ab->mode == USB_IDLE) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
}
if (event != UX500_MUSB_RIDC)
event = UX500_MUSB_VBUS;
break;
case USB_LINK_ACA_RID_A_9540:
event = UX500_MUSB_RIDA;
case USB_LINK_HM_IDGND_9540:
case USB_LINK_STD_UPSTREAM_9540:
if (ab->mode == USB_PERIPHERAL) {
ab->mode = USB_HOST;
ab8500_usb_peri_phy_dis(ab);
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
if (ab->mode == USB_IDLE) {
ab->mode = USB_HOST;
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
ab->phy.otg->default_a = true;
if (event != UX500_MUSB_RIDA)
event = UX500_MUSB_ID;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
break;
case USB_LINK_DEDICATED_CHG_9540:
ab->mode = USB_DEDICATED_CHG;
event = UX500_MUSB_CHARGER;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
break;
case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540:
case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540:
if (!(is_ab9540_2p0_or_earlier(ab->ab8500))) {
event = UX500_MUSB_NONE;
if (ab->mode == USB_HOST) {
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_host_phy_dis(ab);
ab->mode = USB_IDLE;
}
if (ab->mode == USB_PERIPHERAL) {
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_peri_phy_dis(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_CLEAN,
&ab->vbus_draw);
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
}
}
break;
default:
break;
}
return 0;
}
static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
enum ab8540_usb_link_status lsts)
{
enum ux500_musb_vbus_id_status event = 0;
dev_dbg(ab->dev, "ab8540_usb_link_status_update %d\n", lsts);
if (ab->enabled_charging_detection) {
/* Disable USB Charger detection */
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8540_VBUS_CTRL_REG,
AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, 0x00);
ab->enabled_charging_detection = false;
}
/*
* Spurious link_status interrupts are seen in case of a
* disconnection of a device in IDGND and RIDA stage
*/
if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8540 &&
(lsts == USB_LINK_STD_HOST_C_NS_8540 ||
lsts == USB_LINK_STD_HOST_NC_8540))
return 0;
if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8540 &&
(lsts == USB_LINK_STD_HOST_NC_8540))
return 0;
ab->previous_link_status_state = lsts;
switch (lsts) {
case USB_LINK_ACA_RID_B_8540:
event = UX500_MUSB_RIDB;
case USB_LINK_NOT_CONFIGURED_8540:
case USB_LINK_RESERVED0_8540:
case USB_LINK_RESERVED1_8540:
case USB_LINK_RESERVED2_8540:
case USB_LINK_RESERVED3_8540:
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
if (event != UX500_MUSB_RIDB)
event = UX500_MUSB_NONE;
/*
* Fallback to default B_IDLE as nothing
* is connected
*/
ab->phy.otg->state = OTG_STATE_B_IDLE;
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
break;
case USB_LINK_ACA_RID_C_NM_8540:
event = UX500_MUSB_RIDC;
case USB_LINK_STD_HOST_NC_8540:
case USB_LINK_STD_HOST_C_NS_8540:
case USB_LINK_STD_HOST_C_S_8540:
case USB_LINK_CDP_8540:
if (ab->mode == USB_IDLE) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
}
if (event != UX500_MUSB_RIDC)
event = UX500_MUSB_VBUS;
break;
case USB_LINK_ACA_RID_A_8540:
case USB_LINK_ACA_DOCK_CHGR_8540:
event = UX500_MUSB_RIDA;
case USB_LINK_HM_IDGND_8540:
case USB_LINK_STD_UPSTREAM_8540:
if (ab->mode == USB_IDLE) {
ab->mode = USB_HOST;
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
ab->phy.otg->default_a = true;
if (event != UX500_MUSB_RIDA)
event = UX500_MUSB_ID;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
break;
case USB_LINK_DEDICATED_CHG_8540:
ab->mode = USB_DEDICATED_CHG;
event = UX500_MUSB_CHARGER;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
break;
case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540:
case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540:
event = UX500_MUSB_NONE;
if (ab->mode == USB_HOST) {
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_host_phy_dis(ab);
ab->mode = USB_IDLE;
}
if (ab->mode == USB_PERIPHERAL) {
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_peri_phy_dis(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_CLEAN, &ab->vbus_draw);
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
}
break;
default:
event = UX500_MUSB_NONE;
break;
}
return 0;
}
static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
enum ab8505_usb_link_status lsts)
{
enum ux500_musb_vbus_id_status event = 0;
dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts);
/*
* Spurious link_status interrupts are seen at the time of
* disconnection of a device in RIDA state
*/
if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 &&
(lsts == USB_LINK_STD_HOST_NC_8505))
return 0;
ab->previous_link_status_state = lsts;
switch (lsts) {
case USB_LINK_ACA_RID_B_8505:
event = UX500_MUSB_RIDB;
case USB_LINK_NOT_CONFIGURED_8505:
case USB_LINK_RESERVED0_8505:
case USB_LINK_RESERVED1_8505:
case USB_LINK_RESERVED2_8505:
case USB_LINK_RESERVED3_8505:
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
if (event != UX500_MUSB_RIDB)
event = UX500_MUSB_NONE;
/*
* Fallback to default B_IDLE as nothing
* is connected
*/
ab->phy.otg->state = OTG_STATE_B_IDLE;
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
break;
case USB_LINK_ACA_RID_C_NM_8505:
event = UX500_MUSB_RIDC;
case USB_LINK_STD_HOST_NC_8505:
case USB_LINK_STD_HOST_C_NS_8505:
case USB_LINK_STD_HOST_C_S_8505:
case USB_LINK_CDP_8505:
if (ab->mode == USB_IDLE) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
}
if (event != UX500_MUSB_RIDC)
event = UX500_MUSB_VBUS;
break;
case USB_LINK_ACA_RID_A_8505:
case USB_LINK_ACA_DOCK_CHGR_8505:
event = UX500_MUSB_RIDA;
case USB_LINK_HM_IDGND_8505:
if (ab->mode == USB_IDLE) {
ab->mode = USB_HOST;
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
ab->phy.otg->default_a = true;
if (event != UX500_MUSB_RIDA)
event = UX500_MUSB_ID;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
break;
case USB_LINK_DEDICATED_CHG_8505:
ab->mode = USB_DEDICATED_CHG;
event = UX500_MUSB_CHARGER;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
break;
default:
break;
}
return 0;
}
static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
enum ab8500_usb_link_status lsts)
{
enum ux500_musb_vbus_id_status event = 0;
dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts);
/*
* Spurious link_status interrupts are seen in case of a
* disconnection of a device in IDGND and RIDA stage
*/
if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 &&
(lsts == USB_LINK_STD_HOST_C_NS_8500 ||
lsts == USB_LINK_STD_HOST_NC_8500))
return 0;
if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 &&
lsts == USB_LINK_STD_HOST_NC_8500)
return 0;
ab->previous_link_status_state = lsts;
switch (lsts) {
case USB_LINK_ACA_RID_B_8500:
event = UX500_MUSB_RIDB;
case USB_LINK_NOT_CONFIGURED_8500:
case USB_LINK_NOT_VALID_LINK_8500:
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
if (event != UX500_MUSB_RIDB)
event = UX500_MUSB_NONE;
/* Fallback to default B_IDLE as nothing is connected */
ab->phy.otg->state = OTG_STATE_B_IDLE;
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
break;
case USB_LINK_ACA_RID_C_NM_8500:
case USB_LINK_ACA_RID_C_HS_8500:
case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
event = UX500_MUSB_RIDC;
case USB_LINK_STD_HOST_NC_8500:
case USB_LINK_STD_HOST_C_NS_8500:
case USB_LINK_STD_HOST_C_S_8500:
case USB_LINK_HOST_CHG_NM_8500:
case USB_LINK_HOST_CHG_HS_8500:
case USB_LINK_HOST_CHG_HS_CHIRP_8500:
if (ab->mode == USB_IDLE) {
ab->mode = USB_PERIPHERAL;
ab8500_usb_peri_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
}
if (event != UX500_MUSB_RIDC)
event = UX500_MUSB_VBUS;
break;
case USB_LINK_ACA_RID_A_8500:
event = UX500_MUSB_RIDA;
case USB_LINK_HM_IDGND_8500:
if (ab->mode == USB_IDLE) {
ab->mode = USB_HOST;
ab8500_usb_host_phy_en(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_PREPARE, &ab->vbus_draw);
}
ab->phy.otg->default_a = true;
if (event != UX500_MUSB_RIDA)
event = UX500_MUSB_ID;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
break;
case USB_LINK_DEDICATED_CHG_8500:
ab->mode = USB_DEDICATED_CHG;
event = UX500_MUSB_CHARGER;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
break;
case USB_LINK_RESERVED_8500:
break;
}
return 0;
}
/*
* Connection Sequence:
* 1. Link Status Interrupt
* 2. Enable AB clock
* 3. Enable AB regulators
* 4. Enable USB phy
* 5. Reset the musb controller
* 6. Switch the ULPI GPIO pins to fucntion mode
* 7. Enable the musb Peripheral5 clock
* 8. Restore MUSB context
*/
static int abx500_usb_link_status_update(struct ab8500_usb *ab)
{
u8 reg;
int ret = 0;
if (is_ab8500(ab->ab8500)) {
enum ab8500_usb_link_status lsts;
abx500_get_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_LINE_STAT_REG, &reg);
lsts = (reg >> 3) & 0x0F;
ret = ab8500_usb_link_status_update(ab, lsts);
} else if (is_ab8505(ab->ab8500)) {
enum ab8505_usb_link_status lsts;
abx500_get_register_interruptible(ab->dev,
AB8500_USB, AB8505_USB_LINE_STAT_REG, &reg);
lsts = (reg >> 3) & 0x1F;
ret = ab8505_usb_link_status_update(ab, lsts);
} else if (is_ab8540(ab->ab8500)) {
enum ab8540_usb_link_status lsts;
abx500_get_register_interruptible(ab->dev,
AB8500_USB, AB8540_USB_LINK_STAT_REG, &reg);
lsts = (reg >> 3) & 0xFF;
ret = ab8540_usb_link_status_update(ab, lsts);
} else if (is_ab9540(ab->ab8500)) {
enum ab9540_usb_link_status lsts;
abx500_get_register_interruptible(ab->dev,
AB8500_USB, AB9540_USB_LINK_STAT_REG, &reg);
lsts = (reg >> 3) & 0xFF;
ret = ab9540_usb_link_status_update(ab, lsts);
}
return ret;
}
/*
* Disconnection Sequence:
* 1. Disconect Interrupt
* 2. Disable regulators
* 3. Disable AB clock
* 4. Disable the Phy
* 5. Link Status Interrupt
* 6. Disable Musb Clock
*/
static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
{
struct ab8500_usb *ab = (struct ab8500_usb *) data;
enum usb_phy_events event = UX500_MUSB_NONE;
/* Link status will not be updated till phy is disabled. */
if (ab->mode == USB_HOST) {
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_host_phy_dis(ab);
ab->mode = USB_IDLE;
}
if (ab->mode == USB_PERIPHERAL) {
atomic_notifier_call_chain(&ab->phy.notifier,
event, &ab->vbus_draw);
ab8500_usb_peri_phy_dis(ab);
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_CLEAN, &ab->vbus_draw);
ab->mode = USB_IDLE;
ab->phy.otg->default_a = false;
ab->vbus_draw = 0;
}
if (is_ab8500_2p0(ab->ab8500)) {
if (ab->mode == USB_DEDICATED_CHG) {
ab8500_usb_wd_linkstatus(ab,
AB8500_BIT_PHY_CTRL_DEVICE_EN);
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
AB8500_BIT_PHY_CTRL_DEVICE_EN, 0);
}
}
return IRQ_HANDLED;
}
static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data)
{
struct ab8500_usb *ab = (struct ab8500_usb *)data;
abx500_usb_link_status_update(ab);
return IRQ_HANDLED;
}
static void ab8500_usb_phy_disable_work(struct work_struct *work)
{
struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
phy_dis_work);
if (!ab->phy.otg->host)
ab8500_usb_host_phy_dis(ab);
if (!ab->phy.otg->gadget)
ab8500_usb_peri_phy_dis(ab);
}
/* Check if VBUS is set and linkstatus has not detected a cable. */
static bool ab8500_usb_check_vbus_status(struct ab8500_usb *ab)
{
u8 isource2;
u8 reg;
enum ab8540_usb_link_status lsts;
abx500_get_register_interruptible(ab->dev,
AB8500_INTERRUPT, AB8500_IT_SOURCE2_REG,
&isource2);
/* If Vbus is below 3.6V abort */
if (!(isource2 & AB8500_BIT_SOURCE2_VBUSDET))
return false;
abx500_get_register_interruptible(ab->dev,
AB8500_USB, AB8540_USB_LINK_STAT_REG,
&reg);
lsts = (reg >> 3) & 0xFF;
/* Check if linkstatus has detected a cable */
if (lsts)
return false;
return true;
}
/* re-trigger charger detection again with watchdog re-kick. */
static void ab8500_usb_vbus_turn_on_event_work(struct work_struct *work)
{
struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
vbus_event_work);
if (ab->mode != USB_IDLE)
return;
abx500_set_register_interruptible(ab->dev,
AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
AB8500_BIT_WD_CTRL_ENABLE);
udelay(100);
abx500_set_register_interruptible(ab->dev,
AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
AB8500_BIT_WD_CTRL_ENABLE | AB8500_BIT_WD_CTRL_KICK);
udelay(100);
/* Disable Main watchdog */
abx500_set_register_interruptible(ab->dev,
AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
0x0);
/* Enable USB Charger detection */
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8540_VBUS_CTRL_REG,
AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA,
AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA);
ab->enabled_charging_detection = true;
}
static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
{
/*
* AB8500 V2 has eye diagram issues when drawing more than 100mA from
* VBUS. Set charging current to 100mA in case of standard host
*/
if (is_ab8500_2p0_or_earlier(ab->ab8500))
if (mA > 100)
mA = 100;
return mA;
}
static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
{
struct ab8500_usb *ab;
if (!phy)
return -ENODEV;
ab = phy_to_ab(phy);
mA = ab8500_eyediagram_workaroud(ab, mA);
ab->vbus_draw = mA;
atomic_notifier_call_chain(&ab->phy.notifier,
UX500_MUSB_VBUS, &ab->vbus_draw);
return 0;
}
static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
{
/* TODO */
return 0;
}
static int ab8500_usb_set_peripheral(struct usb_otg *otg,
struct usb_gadget *gadget)
{
struct ab8500_usb *ab;
if (!otg)
return -ENODEV;
ab = phy_to_ab(otg->usb_phy);
ab->phy.otg->gadget = gadget;
/* Some drivers call this function in atomic context.
* Do not update ab8500 registers directly till this
* is fixed.
*/
if ((ab->mode != USB_IDLE) && !gadget) {
ab->mode = USB_IDLE;
schedule_work(&ab->phy_dis_work);
}
return 0;
}
static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
{
struct ab8500_usb *ab;
if (!otg)
return -ENODEV;
ab = phy_to_ab(otg->usb_phy);
ab->phy.otg->host = host;
/* Some drivers call this function in atomic context.
* Do not update ab8500 registers directly till this
* is fixed.
*/
if ((ab->mode != USB_IDLE) && !host) {
ab->mode = USB_IDLE;
schedule_work(&ab->phy_dis_work);
}
return 0;
}
static void ab8500_usb_restart_phy(struct ab8500_usb *ab)
{
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
AB8500_BIT_PHY_CTRL_DEVICE_EN,
AB8500_BIT_PHY_CTRL_DEVICE_EN);
udelay(100);
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
AB8500_BIT_PHY_CTRL_DEVICE_EN,
0);
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
AB8500_BIT_PHY_CTRL_HOST_EN,
AB8500_BIT_PHY_CTRL_HOST_EN);
udelay(100);
abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_USB, AB8500_USB_PHY_CTRL_REG,
AB8500_BIT_PHY_CTRL_HOST_EN,
0);
}
static int ab8500_usb_regulator_get(struct ab8500_usb *ab)
{
int err;
ab->v_ape = devm_regulator_get(ab->dev, "v-ape");
if (IS_ERR(ab->v_ape)) {
dev_err(ab->dev, "Could not get v-ape supply\n");
err = PTR_ERR(ab->v_ape);
return err;
}
ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18");
if (IS_ERR(ab->v_ulpi)) {
dev_err(ab->dev, "Could not get vddulpivio18 supply\n");
err = PTR_ERR(ab->v_ulpi);
return err;
}
ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8");
if (IS_ERR(ab->v_musb)) {
dev_err(ab->dev, "Could not get musb_1v8 supply\n");
err = PTR_ERR(ab->v_musb);
return err;
}
return 0;
}
static int ab8500_usb_irq_setup(struct platform_device *pdev,
struct ab8500_usb *ab)
{
int err;
int irq;
if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) {
irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
if (irq < 0) {
dev_err(&pdev->dev, "Link status irq not found\n");
return irq;
}
err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
ab8500_usb_link_status_irq,
IRQF_NO_SUSPEND | IRQF_SHARED,
"usb-link-status", ab);
if (err < 0) {
dev_err(ab->dev, "request_irq failed for link status irq\n");
return err;
}
}
if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) {
irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
if (irq < 0) {
dev_err(&pdev->dev, "ID fall irq not found\n");
return irq;
}
err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
ab8500_usb_disconnect_irq,
IRQF_NO_SUSPEND | IRQF_SHARED,
"usb-id-fall", ab);
if (err < 0) {
dev_err(ab->dev, "request_irq failed for ID fall irq\n");
return err;
}
}
if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) {
irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
if (irq < 0) {
dev_err(&pdev->dev, "VBUS fall irq not found\n");
return irq;
}
err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
ab8500_usb_disconnect_irq,
IRQF_NO_SUSPEND | IRQF_SHARED,
"usb-vbus-fall", ab);
if (err < 0) {
dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
return err;
}
}
return 0;
}
static void ab8500_usb_set_ab8500_tuning_values(struct ab8500_usb *ab)
{
int err;
/* Enable the PBT/Bank 0x12 access */
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
if (err < 0)
dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
err);
/* Switch to normal mode/disable Bank 0x12 access */
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
if (err < 0)
dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
err);
}
static void ab8500_usb_set_ab8505_tuning_values(struct ab8500_usb *ab)
{
int err;
/* Enable the PBT/Bank 0x12 access */
err = abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
0x01, 0x01);
if (err < 0)
dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
err);
err = abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE1,
0xC8, 0xC8);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
err);
err = abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE2,
0x60, 0x60);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
err);
err = abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE3,
0xFC, 0x80);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
err);
/* Switch to normal mode/disable Bank 0x12 access */
err = abx500_mask_and_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
0x00, 0x00);
if (err < 0)
dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
err);
}
static void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab)
{
int err;
err = abx500_set_register_interruptible(ab->dev,
AB8540_DEBUG, AB8500_USB_PHY_TUNE1, 0xCC);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE1 register ret=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8540_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE2 register ret=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8540_DEBUG, AB8500_USB_PHY_TUNE3, 0x90);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE3 regester ret=%d\n",
err);
}
static void ab8500_usb_set_ab9540_tuning_values(struct ab8500_usb *ab)
{
int err;
/* Enable the PBT/Bank 0x12 access */
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
if (err < 0)
dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
err);
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x80);
if (err < 0)
dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
err);
/* Switch to normal mode/disable Bank 0x12 access */
err = abx500_set_register_interruptible(ab->dev,
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
if (err < 0)
dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
err);
}
static int ab8500_usb_probe(struct platform_device *pdev)
{
struct ab8500_usb *ab;
struct ab8500 *ab8500;
struct usb_otg *otg;
int err;
int rev;
ab8500 = dev_get_drvdata(pdev->dev.parent);
rev = abx500_get_chip_id(&pdev->dev);
if (is_ab8500_1p1_or_earlier(ab8500)) {
dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev);
return -ENODEV;
}
ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL);
if (!ab)
return -ENOMEM;
otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
if (!otg)
return -ENOMEM;
ab->dev = &pdev->dev;
ab->ab8500 = ab8500;
ab->phy.dev = ab->dev;
ab->phy.otg = otg;
ab->phy.label = "ab8500";
ab->phy.set_suspend = ab8500_usb_set_suspend;
ab->phy.set_power = ab8500_usb_set_power;
ab->phy.otg->state = OTG_STATE_UNDEFINED;
otg->usb_phy = &ab->phy;
otg->set_host = ab8500_usb_set_host;
otg->set_peripheral = ab8500_usb_set_peripheral;
if (is_ab8500(ab->ab8500)) {
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
} else if (is_ab8505(ab->ab8500)) {
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
} else if (is_ab8540(ab->ab8500)) {
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS |
AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK |
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
} else if (is_ab9540(ab->ab8500)) {
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
if (is_ab9540_2p0_or_earlier(ab->ab8500))
ab->flags |= AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
AB8500_USB_FLAG_USE_VBUS_DET_IRQ;
}
/* Disable regulator voltage setting for AB8500 <= v2.0 */
if (is_ab8500_2p0_or_earlier(ab->ab8500))
ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
platform_set_drvdata(pdev, ab);
/* all: Disable phy when called from set_host and set_peripheral */
INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);
INIT_WORK(&ab->vbus_event_work, ab8500_usb_vbus_turn_on_event_work);
err = ab8500_usb_regulator_get(ab);
if (err)
return err;
ab->sysclk = devm_clk_get(ab->dev, "sysclk");
if (IS_ERR(ab->sysclk)) {
dev_err(ab->dev, "Could not get sysclk.\n");
return PTR_ERR(ab->sysclk);
}
err = ab8500_usb_irq_setup(pdev, ab);
if (err < 0)
return err;
err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
if (err) {
dev_err(&pdev->dev, "Can't register transceiver\n");
return err;
}
if (is_ab8500(ab->ab8500) && !is_ab8500_2p0_or_earlier(ab->ab8500))
/* Phy tuning values for AB8500 > v2.0 */
ab8500_usb_set_ab8500_tuning_values(ab);
else if (is_ab8505(ab->ab8500))
/* Phy tuning values for AB8505 */
ab8500_usb_set_ab8505_tuning_values(ab);
else if (is_ab8540(ab->ab8500))
/* Phy tuning values for AB8540 */
ab8500_usb_set_ab8540_tuning_values(ab);
else if (is_ab9540(ab->ab8500))
/* Phy tuning values for AB9540 */
ab8500_usb_set_ab9540_tuning_values(ab);
/* Needed to enable ID detection. */
ab8500_usb_wd_workaround(ab);
/*
* This is required for usb-link-status to work properly when a
* cable is connected at boot time.
*/
ab8500_usb_restart_phy(ab);
if (ab->flags & AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS) {
if (ab8500_usb_check_vbus_status(ab))
schedule_work(&ab->vbus_event_work);
}
abx500_usb_link_status_update(ab);
dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev);
return 0;
}
static int ab8500_usb_remove(struct platform_device *pdev)
{
struct ab8500_usb *ab = platform_get_drvdata(pdev);
cancel_work_sync(&ab->phy_dis_work);
cancel_work_sync(&ab->vbus_event_work);
usb_remove_phy(&ab->phy);
if (ab->mode == USB_HOST)
ab8500_usb_host_phy_dis(ab);
else if (ab->mode == USB_PERIPHERAL)
ab8500_usb_peri_phy_dis(ab);
return 0;
}
static struct platform_device_id ab8500_usb_devtype[] = {
{ .name = "ab8500-usb", },
{ .name = "ab8540-usb", },
{ .name = "ab9540-usb", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype);
static struct platform_driver ab8500_usb_driver = {
.probe = ab8500_usb_probe,
.remove = ab8500_usb_remove,
.id_table = ab8500_usb_devtype,
.driver = {
.name = "abx5x0-usb",
},
};
static int __init ab8500_usb_init(void)
{
return platform_driver_register(&ab8500_usb_driver);
}
subsys_initcall(ab8500_usb_init);
static void __exit ab8500_usb_exit(void)
{
platform_driver_unregister(&ab8500_usb_driver);
}
module_exit(ab8500_usb_exit);
MODULE_AUTHOR("ST-Ericsson AB");
MODULE_DESCRIPTION("AB8500 family usb transceiver driver");
MODULE_LICENSE("GPL");
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