| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Brownell | 1957 | 55.49% | 2 | 3.28% |
| Tony Lindgren | 483 | 13.69% | 12 | 19.67% |
| Kishon Vijay Abraham I | 284 | 8.05% | 9 | 14.75% |
| Grazvydas Ignotas | 147 | 4.17% | 2 | 3.28% |
| Jouni Högander | 147 | 4.17% | 1 | 1.64% |
| Andreas Kemnade | 136 | 3.86% | 3 | 4.92% |
| Heikki Krogerus | 89 | 2.52% | 4 | 6.56% |
| Lei Ming | 84 | 2.38% | 1 | 1.64% |
| Neil Brown | 39 | 1.11% | 1 | 1.64% |
| Matthias Kaehlcke | 28 | 0.79% | 1 | 1.64% |
| Peter Ujfalusi | 18 | 0.51% | 1 | 1.64% |
| Felipe Balbi | 18 | 0.51% | 6 | 9.84% |
| Matt Ranostay | 18 | 0.51% | 1 | 1.64% |
| Balaji T K | 17 | 0.48% | 1 | 1.64% |
| Fabio Baltieri | 17 | 0.48% | 1 | 1.64% |
| Pali Rohár | 10 | 0.28% | 1 | 1.64% |
| Sachin Kamat | 6 | 0.17% | 1 | 1.64% |
| Jingoo Han | 4 | 0.11% | 1 | 1.64% |
| Jarkko Nikula | 4 | 0.11% | 1 | 1.64% |
| Leed Aguilar Pena | 3 | 0.09% | 1 | 1.64% |
| Thierry Reding | 3 | 0.09% | 1 | 1.64% |
| Dan Carpenter | 2 | 0.06% | 1 | 1.64% |
| Linus Torvalds (pre-git) | 2 | 0.06% | 1 | 1.64% |
| Yue haibing | 2 | 0.06% | 1 | 1.64% |
| Uwe Kleine-König | 2 | 0.06% | 1 | 1.64% |
| Arnd Bergmann | 2 | 0.06% | 1 | 1.64% |
| Thomas Gleixner | 2 | 0.06% | 1 | 1.64% |
| Yang Yingliang | 1 | 0.03% | 1 | 1.64% |
| Linus Torvalds | 1 | 0.03% | 1 | 1.64% |
| Wolfram Sang | 1 | 0.03% | 1 | 1.64% |
| Total | 3527 | 61 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller * * Copyright (C) 2004-2007 Texas Instruments * Copyright (C) 2008 Nokia Corporation * Contact: Felipe Balbi <felipe.balbi@nokia.com> * * Current status: * - HS USB ULPI mode works. * - 3-pin mode support may be added in future. */ #include <linux/module.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/workqueue.h> #include <linux/io.h> #include <linux/delay.h> #include <linux/usb/otg.h> #include <linux/phy/phy.h> #include <linux/pm_runtime.h> #include <linux/usb/musb.h> #include <linux/usb/ulpi.h> #include <linux/mfd/twl.h> #include <linux/regulator/consumer.h> #include <linux/err.h> #include <linux/slab.h> /* Register defines */ #define MCPC_CTRL 0x30 #define MCPC_CTRL_RTSOL (1 << 7) #define MCPC_CTRL_EXTSWR (1 << 6) #define MCPC_CTRL_EXTSWC (1 << 5) #define MCPC_CTRL_VOICESW (1 << 4) #define MCPC_CTRL_OUT64K (1 << 3) #define MCPC_CTRL_RTSCTSSW (1 << 2) #define MCPC_CTRL_HS_UART (1 << 0) #define MCPC_IO_CTRL 0x33 #define MCPC_IO_CTRL_MICBIASEN (1 << 5) #define MCPC_IO_CTRL_CTS_NPU (1 << 4) #define MCPC_IO_CTRL_RXD_PU (1 << 3) #define MCPC_IO_CTRL_TXDTYP (1 << 2) #define MCPC_IO_CTRL_CTSTYP (1 << 1) #define MCPC_IO_CTRL_RTSTYP (1 << 0) #define MCPC_CTRL2 0x36 #define MCPC_CTRL2_MCPC_CK_EN (1 << 0) #define OTHER_FUNC_CTRL 0x80 #define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4) #define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2) #define OTHER_IFC_CTRL 0x83 #define OTHER_IFC_CTRL_OE_INT_EN (1 << 6) #define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5) #define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4) #define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3) #define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2) #define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0) #define OTHER_INT_EN_RISE 0x86 #define OTHER_INT_EN_FALL 0x89 #define OTHER_INT_STS 0x8C #define OTHER_INT_LATCH 0x8D #define OTHER_INT_VB_SESS_VLD (1 << 7) #define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */ #define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */ #define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */ #define OTHER_INT_MANU (1 << 1) #define OTHER_INT_ABNORMAL_STRESS (1 << 0) #define ID_STATUS 0x96 #define ID_RES_FLOAT (1 << 4) #define ID_RES_440K (1 << 3) #define ID_RES_200K (1 << 2) #define ID_RES_102K (1 << 1) #define ID_RES_GND (1 << 0) #define POWER_CTRL 0xAC #define POWER_CTRL_OTG_ENAB (1 << 5) #define OTHER_IFC_CTRL2 0xAF #define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4) #define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3) #define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2) #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */ #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0) #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0) #define REG_CTRL_EN 0xB2 #define REG_CTRL_ERROR 0xB5 #define ULPI_I2C_CONFLICT_INTEN (1 << 0) #define OTHER_FUNC_CTRL2 0xB8 #define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0) /* following registers do not have separate _clr and _set registers */ #define VBUS_DEBOUNCE 0xC0 #define ID_DEBOUNCE 0xC1 #define VBAT_TIMER 0xD3 #define PHY_PWR_CTRL 0xFD #define PHY_PWR_PHYPWD (1 << 0) #define PHY_CLK_CTRL 0xFE #define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2) #define PHY_CLK_CTRL_CLK32K_EN (1 << 1) #define REQ_PHY_DPLL_CLK (1 << 0) #define PHY_CLK_CTRL_STS 0xFF #define PHY_DPLL_CLK (1 << 0) /* In module TWL_MODULE_PM_MASTER */ #define STS_HW_CONDITIONS 0x0F /* In module TWL_MODULE_PM_RECEIVER */ #define VUSB_DEDICATED1 0x7D #define VUSB_DEDICATED2 0x7E #define VUSB1V5_DEV_GRP 0x71 #define VUSB1V5_TYPE 0x72 #define VUSB1V5_REMAP 0x73 #define VUSB1V8_DEV_GRP 0x74 #define VUSB1V8_TYPE 0x75 #define VUSB1V8_REMAP 0x76 #define VUSB3V1_DEV_GRP 0x77 #define VUSB3V1_TYPE 0x78 #define VUSB3V1_REMAP 0x79 /* In module TWL4030_MODULE_INTBR */ #define PMBR1 0x0D #define GPIO_USB_4PIN_ULPI_2430C (3 << 0) static irqreturn_t twl4030_usb_irq(int irq, void *_twl); /* * If VBUS is valid or ID is ground, then we know a * cable is present and we need to be runtime-enabled */ static inline bool cable_present(enum musb_vbus_id_status stat) { return stat == MUSB_VBUS_VALID || stat == MUSB_ID_GROUND; } struct twl4030_usb { struct usb_phy phy; struct device *dev; /* TWL4030 internal USB regulator supplies */ struct regulator *usb1v5; struct regulator *usb1v8; struct regulator *usb3v1; /* for vbus reporting with irqs disabled */ struct mutex lock; /* pin configuration */ enum twl4030_usb_mode usb_mode; int irq; enum musb_vbus_id_status linkstat; atomic_t connected; bool vbus_supplied; bool musb_mailbox_pending; unsigned long runtime_suspended:1; unsigned long needs_resume:1; struct delayed_work id_workaround_work; }; /* internal define on top of container_of */ #define phy_to_twl(x) container_of((x), struct twl4030_usb, phy) /*-------------------------------------------------------------------------*/ static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl, u8 module, u8 data, u8 address) { u8 check = 0xFF; if ((twl_i2c_write_u8(module, data, address) >= 0) && (twl_i2c_read_u8(module, &check, address) >= 0) && (check == data)) return 0; dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", 1, module, address, check, data); /* Failed once: Try again */ if ((twl_i2c_write_u8(module, data, address) >= 0) && (twl_i2c_read_u8(module, &check, address) >= 0) && (check == data)) return 0; dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", 2, module, address, check, data); /* Failed again: Return error */ return -EBUSY; } #define twl4030_usb_write_verify(twl, address, data) \ twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address)) static inline int twl4030_usb_write(struct twl4030_usb *twl, u8 address, u8 data) { int ret = 0; ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address); if (ret < 0) dev_dbg(twl->dev, "TWL4030:USB:Write[0x%x] Error %d\n", address, ret); return ret; } static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address) { u8 data; int ret = 0; ret = twl_i2c_read_u8(module, &data, address); if (ret >= 0) ret = data; else dev_dbg(twl->dev, "TWL4030:readb[0x%x,0x%x] Error %d\n", module, address, ret); return ret; } static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address) { return twl4030_readb(twl, TWL_MODULE_USB, address); } /*-------------------------------------------------------------------------*/ static inline int twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits) { return twl4030_usb_write(twl, ULPI_SET(reg), bits); } static inline int twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) { return twl4030_usb_write(twl, ULPI_CLR(reg), bits); } /*-------------------------------------------------------------------------*/ static bool twl4030_is_driving_vbus(struct twl4030_usb *twl) { int ret; ret = twl4030_usb_read(twl, PHY_CLK_CTRL_STS); if (ret < 0 || !(ret & PHY_DPLL_CLK)) /* * if clocks are off, registers are not updated, * but we can assume we don't drive VBUS in this case */ return false; ret = twl4030_usb_read(twl, ULPI_OTG_CTRL); if (ret < 0) return false; return (ret & (ULPI_OTG_DRVVBUS | ULPI_OTG_CHRGVBUS)) ? true : false; } static enum musb_vbus_id_status twl4030_usb_linkstat(struct twl4030_usb *twl) { int status; enum musb_vbus_id_status linkstat = MUSB_UNKNOWN; twl->vbus_supplied = false; /* * For ID/VBUS sensing, see manual section 15.4.8 ... * except when using only battery backup power, two * comparators produce VBUS_PRES and ID_PRES signals, * which don't match docs elsewhere. But ... BIT(7) * and BIT(2) of STS_HW_CONDITIONS, respectively, do * seem to match up. If either is true the USB_PRES * signal is active, the OTG module is activated, and * its interrupt may be raised (may wake the system). */ status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS); if (status < 0) dev_err(twl->dev, "USB link status err %d\n", status); else if (status & (BIT(7) | BIT(2))) { if (status & BIT(7)) { if (twl4030_is_driving_vbus(twl)) status &= ~BIT(7); else twl->vbus_supplied = true; } if (status & BIT(2)) linkstat = MUSB_ID_GROUND; else if (status & BIT(7)) linkstat = MUSB_VBUS_VALID; else linkstat = MUSB_VBUS_OFF; } else { if (twl->linkstat != MUSB_UNKNOWN) linkstat = MUSB_VBUS_OFF; } kobject_uevent(&twl->dev->kobj, linkstat == MUSB_VBUS_VALID ? KOBJ_ONLINE : KOBJ_OFFLINE); dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n", status, status, linkstat); /* REVISIT this assumes host and peripheral controllers * are registered, and that both are active... */ return linkstat; } static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode) { twl->usb_mode = mode; switch (mode) { case T2_USB_MODE_ULPI: twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL, ULPI_IFC_CTRL_CARKITMODE); twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL, ULPI_FUNC_CTRL_XCVRSEL_MASK | ULPI_FUNC_CTRL_OPMODE_MASK); break; case -1: /* FIXME: power on defaults */ break; default: dev_err(twl->dev, "unsupported T2 transceiver mode %d\n", mode); break; } } static void twl4030_i2c_access(struct twl4030_usb *twl, int on) { unsigned long timeout; int val = twl4030_usb_read(twl, PHY_CLK_CTRL); if (val >= 0) { if (on) { /* enable DPLL to access PHY registers over I2C */ val |= REQ_PHY_DPLL_CLK; WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, (u8)val) < 0); timeout = jiffies + HZ; while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & PHY_DPLL_CLK) && time_before(jiffies, timeout)) udelay(10); if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & PHY_DPLL_CLK)) dev_err(twl->dev, "Timeout setting T2 HSUSB " "PHY DPLL clock\n"); } else { /* let ULPI control the DPLL clock */ val &= ~REQ_PHY_DPLL_CLK; WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, (u8)val) < 0); } } } static void __twl4030_phy_power(struct twl4030_usb *twl, int on) { u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL); if (on) pwr &= ~PHY_PWR_PHYPWD; else pwr |= PHY_PWR_PHYPWD; WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0); } static int twl4030_usb_runtime_suspend(struct device *dev); static int twl4030_usb_runtime_resume(struct device *dev); static int __maybe_unused twl4030_usb_suspend(struct device *dev) { struct twl4030_usb *twl = dev_get_drvdata(dev); /* * we need enabled runtime on resume, * so turn irq off here, so we do not get it early * note: wakeup on usb plug works independently of this */ dev_dbg(twl->dev, "%s\n", __func__); disable_irq(twl->irq); if (!twl->runtime_suspended && !atomic_read(&twl->connected)) { twl4030_usb_runtime_suspend(dev); twl->needs_resume = 1; } return 0; } static int __maybe_unused twl4030_usb_resume(struct device *dev) { struct twl4030_usb *twl = dev_get_drvdata(dev); dev_dbg(twl->dev, "%s\n", __func__); enable_irq(twl->irq); if (twl->needs_resume) twl4030_usb_runtime_resume(dev); /* check whether cable status changed */ twl4030_usb_irq(0, twl); twl->runtime_suspended = 0; return 0; } static int __maybe_unused twl4030_usb_runtime_suspend(struct device *dev) { struct twl4030_usb *twl = dev_get_drvdata(dev); dev_dbg(twl->dev, "%s\n", __func__); __twl4030_phy_power(twl, 0); regulator_disable(twl->usb1v5); regulator_disable(twl->usb1v8); regulator_disable(twl->usb3v1); twl->runtime_suspended = 1; return 0; } static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev) { struct twl4030_usb *twl = dev_get_drvdata(dev); int res; dev_dbg(twl->dev, "%s\n", __func__); res = regulator_enable(twl->usb3v1); if (res) dev_err(twl->dev, "Failed to enable usb3v1\n"); res = regulator_enable(twl->usb1v8); if (res) dev_err(twl->dev, "Failed to enable usb1v8\n"); /* * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP * in twl4030) resets the VUSB_DEDICATED2 register. This reset * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to * SLEEP. We work around this by clearing the bit after usv3v1 * is re-activated. This ensures that VUSB3V1 is really active. */ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2); res = regulator_enable(twl->usb1v5); if (res) dev_err(twl->dev, "Failed to enable usb1v5\n"); __twl4030_phy_power(twl, 1); twl4030_usb_write(twl, PHY_CLK_CTRL, twl4030_usb_read(twl, PHY_CLK_CTRL) | (PHY_CLK_CTRL_CLOCKGATING_EN | PHY_CLK_CTRL_CLK32K_EN)); twl4030_i2c_access(twl, 1); twl4030_usb_set_mode(twl, twl->usb_mode); if (twl->usb_mode == T2_USB_MODE_ULPI) twl4030_i2c_access(twl, 0); /* * According to the TPS65950 TRM, there has to be at least 50ms * delay between setting POWER_CTRL_OTG_ENAB and enabling charging * so wait here so that a fully enabled phy can be expected after * resume */ msleep(50); return 0; } static int twl4030_phy_power_off(struct phy *phy) { struct twl4030_usb *twl = phy_get_drvdata(phy); dev_dbg(twl->dev, "%s\n", __func__); return 0; } static int twl4030_phy_power_on(struct phy *phy) { struct twl4030_usb *twl = phy_get_drvdata(phy); dev_dbg(twl->dev, "%s\n", __func__); pm_runtime_get_sync(twl->dev); schedule_delayed_work(&twl->id_workaround_work, HZ); pm_runtime_mark_last_busy(twl->dev); pm_runtime_put_autosuspend(twl->dev); return 0; } static int twl4030_usb_ldo_init(struct twl4030_usb *twl) { /* Enable writing to power configuration registers */ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1, TWL4030_PM_MASTER_PROTECT_KEY); twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2, TWL4030_PM_MASTER_PROTECT_KEY); /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/ /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/ /* input to VUSB3V1 LDO is from VBAT, not VBUS */ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1); /* Initialize 3.1V regulator */ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP); twl->usb3v1 = devm_regulator_get(twl->dev, "usb3v1"); if (IS_ERR(twl->usb3v1)) return -ENODEV; twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE); /* Initialize 1.5V regulator */ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP); twl->usb1v5 = devm_regulator_get(twl->dev, "usb1v5"); if (IS_ERR(twl->usb1v5)) return -ENODEV; twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE); /* Initialize 1.8V regulator */ twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP); twl->usb1v8 = devm_regulator_get(twl->dev, "usb1v8"); if (IS_ERR(twl->usb1v8)) return -ENODEV; twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE); /* disable access to power configuration registers */ twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0, TWL4030_PM_MASTER_PROTECT_KEY); return 0; } static ssize_t vbus_show(struct device *dev, struct device_attribute *attr, char *buf) { struct twl4030_usb *twl = dev_get_drvdata(dev); int ret = -EINVAL; mutex_lock(&twl->lock); ret = sprintf(buf, "%s\n", twl->vbus_supplied ? "on" : "off"); mutex_unlock(&twl->lock); return ret; } static DEVICE_ATTR_RO(vbus); static irqreturn_t twl4030_usb_irq(int irq, void *_twl) { struct twl4030_usb *twl = _twl; enum musb_vbus_id_status status; int err; status = twl4030_usb_linkstat(twl); mutex_lock(&twl->lock); twl->linkstat = status; mutex_unlock(&twl->lock); if (cable_present(status)) { if (atomic_add_unless(&twl->connected, 1, 1)) { dev_dbg(twl->dev, "%s: cable connected %i\n", __func__, status); pm_runtime_get_sync(twl->dev); twl->musb_mailbox_pending = true; } } else { if (atomic_add_unless(&twl->connected, -1, 0)) { dev_dbg(twl->dev, "%s: cable disconnected %i\n", __func__, status); pm_runtime_mark_last_busy(twl->dev); pm_runtime_put_autosuspend(twl->dev); twl->musb_mailbox_pending = true; } } if (twl->musb_mailbox_pending) { err = musb_mailbox(status); if (!err) twl->musb_mailbox_pending = false; } /* don't schedule during sleep - irq works right then */ if (status == MUSB_ID_GROUND && pm_runtime_active(twl->dev)) { cancel_delayed_work(&twl->id_workaround_work); schedule_delayed_work(&twl->id_workaround_work, HZ); } if (irq) sysfs_notify(&twl->dev->kobj, NULL, "vbus"); return IRQ_HANDLED; } static void twl4030_id_workaround_work(struct work_struct *work) { struct twl4030_usb *twl = container_of(work, struct twl4030_usb, id_workaround_work.work); twl4030_usb_irq(0, twl); } static int twl4030_phy_init(struct phy *phy) { struct twl4030_usb *twl = phy_get_drvdata(phy); pm_runtime_get_sync(twl->dev); twl->linkstat = MUSB_UNKNOWN; schedule_delayed_work(&twl->id_workaround_work, HZ); pm_runtime_mark_last_busy(twl->dev); pm_runtime_put_autosuspend(twl->dev); return 0; } static int twl4030_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget) { if (!otg) return -ENODEV; otg->gadget = gadget; if (!gadget) otg->state = OTG_STATE_UNDEFINED; return 0; } static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host) { if (!otg) return -ENODEV; otg->host = host; if (!host) otg->state = OTG_STATE_UNDEFINED; return 0; } static const struct phy_ops ops = { .init = twl4030_phy_init, .power_on = twl4030_phy_power_on, .power_off = twl4030_phy_power_off, .owner = THIS_MODULE, }; static const struct dev_pm_ops twl4030_usb_pm_ops = { SET_RUNTIME_PM_OPS(twl4030_usb_runtime_suspend, twl4030_usb_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(twl4030_usb_suspend, twl4030_usb_resume) }; static int twl4030_usb_probe(struct platform_device *pdev) { struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev); struct twl4030_usb *twl; struct phy *phy; int status, err; struct usb_otg *otg; struct device_node *np = pdev->dev.of_node; struct phy_provider *phy_provider; twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL); if (!twl) return -ENOMEM; if (np) of_property_read_u32(np, "usb_mode", (enum twl4030_usb_mode *)&twl->usb_mode); else if (pdata) { twl->usb_mode = pdata->usb_mode; } else { dev_err(&pdev->dev, "twl4030 initialized without pdata\n"); return -EINVAL; } otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); if (!otg) return -ENOMEM; twl->dev = &pdev->dev; twl->irq = platform_get_irq(pdev, 0); twl->vbus_supplied = false; twl->linkstat = MUSB_UNKNOWN; twl->musb_mailbox_pending = false; twl->phy.dev = twl->dev; twl->phy.label = "twl4030"; twl->phy.otg = otg; twl->phy.type = USB_PHY_TYPE_USB2; otg->usb_phy = &twl->phy; otg->set_host = twl4030_set_host; otg->set_peripheral = twl4030_set_peripheral; phy = devm_phy_create(twl->dev, NULL, &ops); if (IS_ERR(phy)) { dev_dbg(&pdev->dev, "Failed to create PHY\n"); return PTR_ERR(phy); } phy_set_drvdata(phy, twl); phy_provider = devm_of_phy_provider_register(twl->dev, of_phy_simple_xlate); if (IS_ERR(phy_provider)) return PTR_ERR(phy_provider); /* init mutex for workqueue */ mutex_init(&twl->lock); INIT_DELAYED_WORK(&twl->id_workaround_work, twl4030_id_workaround_work); err = twl4030_usb_ldo_init(twl); if (err) { dev_err(&pdev->dev, "ldo init failed\n"); return err; } usb_add_phy_dev(&twl->phy); platform_set_drvdata(pdev, twl); if (device_create_file(&pdev->dev, &dev_attr_vbus)) dev_warn(&pdev->dev, "could not create sysfs file\n"); ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); pm_runtime_enable(&pdev->dev); pm_runtime_get_sync(&pdev->dev); /* Our job is to use irqs and status from the power module * to keep the transceiver disabled when nothing's connected. * * FIXME we actually shouldn't start enabling it until the * USB controller drivers have said they're ready, by calling * set_host() and/or set_peripheral() ... OTG_capable boards * need both handles, otherwise just one suffices. */ status = devm_request_threaded_irq(twl->dev, twl->irq, NULL, twl4030_usb_irq, IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl); if (status < 0) { dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n", twl->irq, status); return status; } if (pdata) err = phy_create_lookup(phy, "usb", "musb-hdrc.0"); if (err) return err; pm_runtime_mark_last_busy(&pdev->dev); pm_runtime_put_autosuspend(twl->dev); dev_info(&pdev->dev, "Initialized TWL4030 USB module\n"); return 0; } static void twl4030_usb_remove(struct platform_device *pdev) { struct twl4030_usb *twl = platform_get_drvdata(pdev); int val; usb_remove_phy(&twl->phy); pm_runtime_get_sync(twl->dev); cancel_delayed_work_sync(&twl->id_workaround_work); device_remove_file(twl->dev, &dev_attr_vbus); /* set transceiver mode to power on defaults */ twl4030_usb_set_mode(twl, -1); /* idle ulpi before powering off */ if (cable_present(twl->linkstat)) pm_runtime_put_noidle(twl->dev); pm_runtime_mark_last_busy(twl->dev); pm_runtime_dont_use_autosuspend(&pdev->dev); pm_runtime_put_sync(twl->dev); pm_runtime_disable(twl->dev); /* autogate 60MHz ULPI clock, * clear dpll clock request for i2c access, * disable 32KHz */ val = twl4030_usb_read(twl, PHY_CLK_CTRL); if (val >= 0) { val |= PHY_CLK_CTRL_CLOCKGATING_EN; val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK); twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val); } /* disable complete OTG block */ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); } #ifdef CONFIG_OF static const struct of_device_id twl4030_usb_id_table[] = { { .compatible = "ti,twl4030-usb" }, {} }; MODULE_DEVICE_TABLE(of, twl4030_usb_id_table); #endif static struct platform_driver twl4030_usb_driver = { .probe = twl4030_usb_probe, .remove_new = twl4030_usb_remove, .driver = { .name = "twl4030_usb", .pm = &twl4030_usb_pm_ops, .of_match_table = of_match_ptr(twl4030_usb_id_table), }, }; static int __init twl4030_usb_init(void) { return platform_driver_register(&twl4030_usb_driver); } subsys_initcall(twl4030_usb_init); static void __exit twl4030_usb_exit(void) { platform_driver_unregister(&twl4030_usb_driver); } module_exit(twl4030_usb_exit); MODULE_ALIAS("platform:twl4030_usb"); MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation"); MODULE_DESCRIPTION("TWL4030 USB transceiver driver"); MODULE_LICENSE("GPL");
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