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736 lines
17 KiB
736 lines
17 KiB
/* |
|
* Motorola CPCAP PMIC USB PHY driver |
|
* Copyright (C) 2017 Tony Lindgren <[email protected]> |
|
* |
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* Some parts based on earlier Motorola Linux kernel tree code in |
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* board-mapphone-usb.c and cpcap-usb-det.c: |
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* Copyright (C) 2007 - 2011 Motorola, Inc. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation version 2. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
|
|
|
#include <linux/atomic.h> |
|
#include <linux/clk.h> |
|
#include <linux/delay.h> |
|
#include <linux/err.h> |
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#include <linux/io.h> |
|
#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_platform.h> |
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#include <linux/iio/consumer.h> |
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#include <linux/pinctrl/consumer.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
|
|
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#include <linux/gpio/consumer.h> |
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#include <linux/mfd/motorola-cpcap.h> |
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#include <linux/phy/omap_usb.h> |
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#include <linux/phy/phy.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/usb/musb.h> |
|
|
|
/* CPCAP_REG_USBC1 register bits */ |
|
#define CPCAP_BIT_IDPULSE BIT(15) |
|
#define CPCAP_BIT_ID100KPU BIT(14) |
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#define CPCAP_BIT_IDPUCNTRL BIT(13) |
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#define CPCAP_BIT_IDPU BIT(12) |
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#define CPCAP_BIT_IDPD BIT(11) |
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#define CPCAP_BIT_VBUSCHRGTMR3 BIT(10) |
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#define CPCAP_BIT_VBUSCHRGTMR2 BIT(9) |
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#define CPCAP_BIT_VBUSCHRGTMR1 BIT(8) |
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#define CPCAP_BIT_VBUSCHRGTMR0 BIT(7) |
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#define CPCAP_BIT_VBUSPU BIT(6) |
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#define CPCAP_BIT_VBUSPD BIT(5) |
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#define CPCAP_BIT_DMPD BIT(4) |
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#define CPCAP_BIT_DPPD BIT(3) |
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#define CPCAP_BIT_DM1K5PU BIT(2) |
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#define CPCAP_BIT_DP1K5PU BIT(1) |
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#define CPCAP_BIT_DP150KPU BIT(0) |
|
|
|
/* CPCAP_REG_USBC2 register bits */ |
|
#define CPCAP_BIT_ZHSDRV1 BIT(15) |
|
#define CPCAP_BIT_ZHSDRV0 BIT(14) |
|
#define CPCAP_BIT_DPLLCLKREQ BIT(13) |
|
#define CPCAP_BIT_SE0CONN BIT(12) |
|
#define CPCAP_BIT_UARTTXTRI BIT(11) |
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#define CPCAP_BIT_UARTSWAP BIT(10) |
|
#define CPCAP_BIT_UARTMUX1 BIT(9) |
|
#define CPCAP_BIT_UARTMUX0 BIT(8) |
|
#define CPCAP_BIT_ULPISTPLOW BIT(7) |
|
#define CPCAP_BIT_TXENPOL BIT(6) |
|
#define CPCAP_BIT_USBXCVREN BIT(5) |
|
#define CPCAP_BIT_USBCNTRL BIT(4) |
|
#define CPCAP_BIT_USBSUSPEND BIT(3) |
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#define CPCAP_BIT_EMUMODE2 BIT(2) |
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#define CPCAP_BIT_EMUMODE1 BIT(1) |
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#define CPCAP_BIT_EMUMODE0 BIT(0) |
|
|
|
/* CPCAP_REG_USBC3 register bits */ |
|
#define CPCAP_BIT_SPARE_898_15 BIT(15) |
|
#define CPCAP_BIT_IHSTX03 BIT(14) |
|
#define CPCAP_BIT_IHSTX02 BIT(13) |
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#define CPCAP_BIT_IHSTX01 BIT(12) |
|
#define CPCAP_BIT_IHSTX0 BIT(11) |
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#define CPCAP_BIT_IDPU_SPI BIT(10) |
|
#define CPCAP_BIT_UNUSED_898_9 BIT(9) |
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#define CPCAP_BIT_VBUSSTBY_EN BIT(8) |
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#define CPCAP_BIT_VBUSEN_SPI BIT(7) |
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#define CPCAP_BIT_VBUSPU_SPI BIT(6) |
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#define CPCAP_BIT_VBUSPD_SPI BIT(5) |
|
#define CPCAP_BIT_DMPD_SPI BIT(4) |
|
#define CPCAP_BIT_DPPD_SPI BIT(3) |
|
#define CPCAP_BIT_SUSPEND_SPI BIT(2) |
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#define CPCAP_BIT_PU_SPI BIT(1) |
|
#define CPCAP_BIT_ULPI_SPI_SEL BIT(0) |
|
|
|
struct cpcap_usb_ints_state { |
|
bool id_ground; |
|
bool id_float; |
|
bool chrg_det; |
|
bool rvrs_chrg; |
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bool vbusov; |
|
|
|
bool chrg_se1b; |
|
bool se0conn; |
|
bool rvrs_mode; |
|
bool chrgcurr1; |
|
bool vbusvld; |
|
bool sessvld; |
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bool sessend; |
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bool se1; |
|
|
|
bool battdetb; |
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bool dm; |
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bool dp; |
|
}; |
|
|
|
enum cpcap_gpio_mode { |
|
CPCAP_DM_DP, |
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CPCAP_MDM_RX_TX, |
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CPCAP_UNKNOWN_DISABLED, /* Seems to disable USB lines */ |
|
CPCAP_OTG_DM_DP, |
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}; |
|
|
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struct cpcap_phy_ddata { |
|
struct regmap *reg; |
|
struct device *dev; |
|
struct usb_phy phy; |
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struct delayed_work detect_work; |
|
struct pinctrl *pins; |
|
struct pinctrl_state *pins_ulpi; |
|
struct pinctrl_state *pins_utmi; |
|
struct pinctrl_state *pins_uart; |
|
struct gpio_desc *gpio[2]; |
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struct iio_channel *vbus; |
|
struct iio_channel *id; |
|
struct regulator *vusb; |
|
atomic_t active; |
|
unsigned int vbus_provider:1; |
|
unsigned int docked:1; |
|
}; |
|
|
|
static bool cpcap_usb_vbus_valid(struct cpcap_phy_ddata *ddata) |
|
{ |
|
int error, value = 0; |
|
|
|
error = iio_read_channel_processed(ddata->vbus, &value); |
|
if (error >= 0) |
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return value > 3900; |
|
|
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dev_err(ddata->dev, "error reading VBUS: %i\n", error); |
|
|
|
return false; |
|
} |
|
|
|
static int cpcap_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host) |
|
{ |
|
otg->host = host; |
|
if (!host) |
|
otg->state = OTG_STATE_UNDEFINED; |
|
|
|
return 0; |
|
} |
|
|
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static int cpcap_usb_phy_set_peripheral(struct usb_otg *otg, |
|
struct usb_gadget *gadget) |
|
{ |
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otg->gadget = gadget; |
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if (!gadget) |
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otg->state = OTG_STATE_UNDEFINED; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct phy_ops ops = { |
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.owner = THIS_MODULE, |
|
}; |
|
|
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static int cpcap_phy_get_ints_state(struct cpcap_phy_ddata *ddata, |
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struct cpcap_usb_ints_state *s) |
|
{ |
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int val, error; |
|
|
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error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val); |
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if (error) |
|
return error; |
|
|
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s->id_ground = val & BIT(15); |
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s->id_float = val & BIT(14); |
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s->vbusov = val & BIT(11); |
|
|
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error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val); |
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if (error) |
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return error; |
|
|
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s->vbusvld = val & BIT(3); |
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s->sessvld = val & BIT(2); |
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s->sessend = val & BIT(1); |
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s->se1 = val & BIT(0); |
|
|
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error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val); |
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if (error) |
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return error; |
|
|
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s->dm = val & BIT(1); |
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s->dp = val & BIT(0); |
|
|
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return 0; |
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} |
|
|
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static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata); |
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static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata); |
|
|
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static void cpcap_usb_try_musb_mailbox(struct cpcap_phy_ddata *ddata, |
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enum musb_vbus_id_status status) |
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{ |
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int error; |
|
|
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error = musb_mailbox(status); |
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if (!error) |
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return; |
|
|
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dev_dbg(ddata->dev, "%s: musb_mailbox failed: %i\n", |
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__func__, error); |
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} |
|
|
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static void cpcap_usb_detect(struct work_struct *work) |
|
{ |
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struct cpcap_phy_ddata *ddata; |
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struct cpcap_usb_ints_state s; |
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bool vbus = false; |
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int error; |
|
|
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ddata = container_of(work, struct cpcap_phy_ddata, detect_work.work); |
|
|
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error = cpcap_phy_get_ints_state(ddata, &s); |
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if (error) |
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return; |
|
|
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vbus = cpcap_usb_vbus_valid(ddata); |
|
|
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/* We need to kick the VBUS as USB A-host */ |
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if (s.id_ground && ddata->vbus_provider) { |
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dev_dbg(ddata->dev, "still in USB A-host mode, kicking VBUS\n"); |
|
|
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cpcap_usb_try_musb_mailbox(ddata, MUSB_ID_GROUND); |
|
|
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error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, |
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CPCAP_BIT_VBUSSTBY_EN | |
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CPCAP_BIT_VBUSEN_SPI, |
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CPCAP_BIT_VBUSEN_SPI); |
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if (error) |
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goto out_err; |
|
|
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return; |
|
} |
|
|
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if (vbus && s.id_ground && ddata->docked) { |
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dev_dbg(ddata->dev, "still docked as A-host, signal ID down\n"); |
|
|
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cpcap_usb_try_musb_mailbox(ddata, MUSB_ID_GROUND); |
|
|
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return; |
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} |
|
|
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/* No VBUS needed with docks */ |
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if (vbus && s.id_ground && !ddata->vbus_provider) { |
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dev_dbg(ddata->dev, "connected to a dock\n"); |
|
|
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ddata->docked = true; |
|
|
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error = cpcap_usb_set_usb_mode(ddata); |
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if (error) |
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goto out_err; |
|
|
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cpcap_usb_try_musb_mailbox(ddata, MUSB_ID_GROUND); |
|
|
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/* |
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* Force check state again after musb has reoriented, |
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* otherwise devices won't enumerate after loading PHY |
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* driver. |
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*/ |
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schedule_delayed_work(&ddata->detect_work, |
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msecs_to_jiffies(1000)); |
|
|
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return; |
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} |
|
|
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if (s.id_ground && !ddata->docked) { |
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dev_dbg(ddata->dev, "id ground, USB host mode\n"); |
|
|
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ddata->vbus_provider = true; |
|
|
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error = cpcap_usb_set_usb_mode(ddata); |
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if (error) |
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goto out_err; |
|
|
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cpcap_usb_try_musb_mailbox(ddata, MUSB_ID_GROUND); |
|
|
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error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, |
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CPCAP_BIT_VBUSSTBY_EN | |
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CPCAP_BIT_VBUSEN_SPI, |
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CPCAP_BIT_VBUSEN_SPI); |
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if (error) |
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goto out_err; |
|
|
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return; |
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} |
|
|
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error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, |
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CPCAP_BIT_VBUSSTBY_EN | |
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CPCAP_BIT_VBUSEN_SPI, 0); |
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if (error) |
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goto out_err; |
|
|
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vbus = cpcap_usb_vbus_valid(ddata); |
|
|
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/* Otherwise assume we're connected to a USB host */ |
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if (vbus) { |
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dev_dbg(ddata->dev, "connected to USB host\n"); |
|
error = cpcap_usb_set_usb_mode(ddata); |
|
if (error) |
|
goto out_err; |
|
cpcap_usb_try_musb_mailbox(ddata, MUSB_VBUS_VALID); |
|
|
|
return; |
|
} |
|
|
|
ddata->vbus_provider = false; |
|
ddata->docked = false; |
|
cpcap_usb_try_musb_mailbox(ddata, MUSB_VBUS_OFF); |
|
|
|
/* Default to debug UART mode */ |
|
error = cpcap_usb_set_uart_mode(ddata); |
|
if (error) |
|
goto out_err; |
|
|
|
dev_dbg(ddata->dev, "set UART mode\n"); |
|
|
|
return; |
|
|
|
out_err: |
|
dev_err(ddata->dev, "error setting cable state: %i\n", error); |
|
} |
|
|
|
static irqreturn_t cpcap_phy_irq_thread(int irq, void *data) |
|
{ |
|
struct cpcap_phy_ddata *ddata = data; |
|
|
|
if (!atomic_read(&ddata->active)) |
|
return IRQ_NONE; |
|
|
|
schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1)); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int cpcap_usb_init_irq(struct platform_device *pdev, |
|
struct cpcap_phy_ddata *ddata, |
|
const char *name) |
|
{ |
|
int irq, error; |
|
|
|
irq = platform_get_irq_byname(pdev, name); |
|
if (irq < 0) |
|
return -ENODEV; |
|
|
|
error = devm_request_threaded_irq(ddata->dev, irq, NULL, |
|
cpcap_phy_irq_thread, |
|
IRQF_SHARED | |
|
IRQF_ONESHOT, |
|
name, ddata); |
|
if (error) { |
|
dev_err(ddata->dev, "could not get irq %s: %i\n", |
|
name, error); |
|
|
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const char * const cpcap_phy_irqs[] = { |
|
/* REG_INT_0 */ |
|
"id_ground", "id_float", |
|
|
|
/* REG_INT1 */ |
|
"se0conn", "vbusvld", "sessvld", "sessend", "se1", |
|
|
|
/* REG_INT_3 */ |
|
"dm", "dp", |
|
}; |
|
|
|
static int cpcap_usb_init_interrupts(struct platform_device *pdev, |
|
struct cpcap_phy_ddata *ddata) |
|
{ |
|
int i, error; |
|
|
|
for (i = 0; i < ARRAY_SIZE(cpcap_phy_irqs); i++) { |
|
error = cpcap_usb_init_irq(pdev, ddata, cpcap_phy_irqs[i]); |
|
if (error) |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Optional pins and modes. At least Motorola mapphone devices |
|
* are using two GPIOs and dynamic pinctrl to multiplex PHY pins |
|
* to UART, ULPI or UTMI mode. |
|
*/ |
|
|
|
static int cpcap_usb_gpio_set_mode(struct cpcap_phy_ddata *ddata, |
|
enum cpcap_gpio_mode mode) |
|
{ |
|
if (!ddata->gpio[0] || !ddata->gpio[1]) |
|
return 0; |
|
|
|
gpiod_set_value(ddata->gpio[0], mode & 1); |
|
gpiod_set_value(ddata->gpio[1], mode >> 1); |
|
|
|
return 0; |
|
} |
|
|
|
static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata) |
|
{ |
|
int error; |
|
|
|
/* Disable lines to prevent glitches from waking up mdm6600 */ |
|
error = cpcap_usb_gpio_set_mode(ddata, CPCAP_UNKNOWN_DISABLED); |
|
if (error) |
|
goto out_err; |
|
|
|
if (ddata->pins_uart) { |
|
error = pinctrl_select_state(ddata->pins, ddata->pins_uart); |
|
if (error) |
|
goto out_err; |
|
} |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1, |
|
CPCAP_BIT_VBUSPD, |
|
CPCAP_BIT_VBUSPD); |
|
if (error) |
|
goto out_err; |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2, |
|
0xffff, CPCAP_BIT_UARTMUX0 | |
|
CPCAP_BIT_EMUMODE0); |
|
if (error) |
|
goto out_err; |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, 0x7fff, |
|
CPCAP_BIT_IDPU_SPI); |
|
if (error) |
|
goto out_err; |
|
|
|
/* Enable UART mode */ |
|
error = cpcap_usb_gpio_set_mode(ddata, CPCAP_DM_DP); |
|
if (error) |
|
goto out_err; |
|
|
|
return 0; |
|
|
|
out_err: |
|
dev_err(ddata->dev, "%s failed with %i\n", __func__, error); |
|
|
|
return error; |
|
} |
|
|
|
static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata) |
|
{ |
|
int error; |
|
|
|
/* Disable lines to prevent glitches from waking up mdm6600 */ |
|
error = cpcap_usb_gpio_set_mode(ddata, CPCAP_UNKNOWN_DISABLED); |
|
if (error) |
|
return error; |
|
|
|
if (ddata->pins_utmi) { |
|
error = pinctrl_select_state(ddata->pins, ddata->pins_utmi); |
|
if (error) { |
|
dev_err(ddata->dev, "could not set usb mode: %i\n", |
|
error); |
|
|
|
return error; |
|
} |
|
} |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1, |
|
CPCAP_BIT_VBUSPD, 0); |
|
if (error) |
|
goto out_err; |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, |
|
CPCAP_BIT_PU_SPI | |
|
CPCAP_BIT_DMPD_SPI | |
|
CPCAP_BIT_DPPD_SPI | |
|
CPCAP_BIT_SUSPEND_SPI | |
|
CPCAP_BIT_ULPI_SPI_SEL, 0); |
|
if (error) |
|
goto out_err; |
|
|
|
error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2, |
|
CPCAP_BIT_USBXCVREN, |
|
CPCAP_BIT_USBXCVREN); |
|
if (error) |
|
goto out_err; |
|
|
|
/* Enable USB mode */ |
|
error = cpcap_usb_gpio_set_mode(ddata, CPCAP_OTG_DM_DP); |
|
if (error) |
|
goto out_err; |
|
|
|
return 0; |
|
|
|
out_err: |
|
dev_err(ddata->dev, "%s failed with %i\n", __func__, error); |
|
|
|
return error; |
|
} |
|
|
|
static int cpcap_usb_init_optional_pins(struct cpcap_phy_ddata *ddata) |
|
{ |
|
ddata->pins = devm_pinctrl_get(ddata->dev); |
|
if (IS_ERR(ddata->pins)) { |
|
dev_info(ddata->dev, "default pins not configured: %ld\n", |
|
PTR_ERR(ddata->pins)); |
|
ddata->pins = NULL; |
|
|
|
return 0; |
|
} |
|
|
|
ddata->pins_ulpi = pinctrl_lookup_state(ddata->pins, "ulpi"); |
|
if (IS_ERR(ddata->pins_ulpi)) { |
|
dev_info(ddata->dev, "ulpi pins not configured\n"); |
|
ddata->pins_ulpi = NULL; |
|
} |
|
|
|
ddata->pins_utmi = pinctrl_lookup_state(ddata->pins, "utmi"); |
|
if (IS_ERR(ddata->pins_utmi)) { |
|
dev_info(ddata->dev, "utmi pins not configured\n"); |
|
ddata->pins_utmi = NULL; |
|
} |
|
|
|
ddata->pins_uart = pinctrl_lookup_state(ddata->pins, "uart"); |
|
if (IS_ERR(ddata->pins_uart)) { |
|
dev_info(ddata->dev, "uart pins not configured\n"); |
|
ddata->pins_uart = NULL; |
|
} |
|
|
|
if (ddata->pins_uart) |
|
return pinctrl_select_state(ddata->pins, ddata->pins_uart); |
|
|
|
return 0; |
|
} |
|
|
|
static void cpcap_usb_init_optional_gpios(struct cpcap_phy_ddata *ddata) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < 2; i++) { |
|
ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode", |
|
i, GPIOD_OUT_HIGH); |
|
if (IS_ERR(ddata->gpio[i])) { |
|
dev_info(ddata->dev, "no mode change GPIO%i: %li\n", |
|
i, PTR_ERR(ddata->gpio[i])); |
|
ddata->gpio[i] = NULL; |
|
} |
|
} |
|
} |
|
|
|
static int cpcap_usb_init_iio(struct cpcap_phy_ddata *ddata) |
|
{ |
|
enum iio_chan_type type; |
|
int error; |
|
|
|
ddata->vbus = devm_iio_channel_get(ddata->dev, "vbus"); |
|
if (IS_ERR(ddata->vbus)) { |
|
error = PTR_ERR(ddata->vbus); |
|
goto out_err; |
|
} |
|
|
|
if (!ddata->vbus->indio_dev) { |
|
error = -ENXIO; |
|
goto out_err; |
|
} |
|
|
|
error = iio_get_channel_type(ddata->vbus, &type); |
|
if (error < 0) |
|
goto out_err; |
|
|
|
if (type != IIO_VOLTAGE) { |
|
error = -EINVAL; |
|
goto out_err; |
|
} |
|
|
|
return 0; |
|
|
|
out_err: |
|
dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n", |
|
error); |
|
|
|
return error; |
|
} |
|
|
|
#ifdef CONFIG_OF |
|
static const struct of_device_id cpcap_usb_phy_id_table[] = { |
|
{ |
|
.compatible = "motorola,cpcap-usb-phy", |
|
}, |
|
{ |
|
.compatible = "motorola,mapphone-cpcap-usb-phy", |
|
}, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, cpcap_usb_phy_id_table); |
|
#endif |
|
|
|
static int cpcap_usb_phy_probe(struct platform_device *pdev) |
|
{ |
|
struct cpcap_phy_ddata *ddata; |
|
struct phy *generic_phy; |
|
struct phy_provider *phy_provider; |
|
struct usb_otg *otg; |
|
const struct of_device_id *of_id; |
|
int error; |
|
|
|
of_id = of_match_device(of_match_ptr(cpcap_usb_phy_id_table), |
|
&pdev->dev); |
|
if (!of_id) |
|
return -EINVAL; |
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
|
if (!ddata) |
|
return -ENOMEM; |
|
|
|
ddata->reg = dev_get_regmap(pdev->dev.parent, NULL); |
|
if (!ddata->reg) |
|
return -ENODEV; |
|
|
|
otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); |
|
if (!otg) |
|
return -ENOMEM; |
|
|
|
ddata->dev = &pdev->dev; |
|
ddata->phy.dev = ddata->dev; |
|
ddata->phy.label = "cpcap_usb_phy"; |
|
ddata->phy.otg = otg; |
|
ddata->phy.type = USB_PHY_TYPE_USB2; |
|
otg->set_host = cpcap_usb_phy_set_host; |
|
otg->set_peripheral = cpcap_usb_phy_set_peripheral; |
|
otg->usb_phy = &ddata->phy; |
|
INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect); |
|
platform_set_drvdata(pdev, ddata); |
|
|
|
ddata->vusb = devm_regulator_get(&pdev->dev, "vusb"); |
|
if (IS_ERR(ddata->vusb)) |
|
return PTR_ERR(ddata->vusb); |
|
|
|
error = regulator_enable(ddata->vusb); |
|
if (error) |
|
return error; |
|
|
|
generic_phy = devm_phy_create(ddata->dev, NULL, &ops); |
|
if (IS_ERR(generic_phy)) { |
|
error = PTR_ERR(generic_phy); |
|
goto out_reg_disable; |
|
} |
|
|
|
phy_set_drvdata(generic_phy, ddata); |
|
|
|
phy_provider = devm_of_phy_provider_register(ddata->dev, |
|
of_phy_simple_xlate); |
|
if (IS_ERR(phy_provider)) { |
|
error = PTR_ERR(phy_provider); |
|
goto out_reg_disable; |
|
} |
|
|
|
error = cpcap_usb_init_optional_pins(ddata); |
|
if (error) |
|
goto out_reg_disable; |
|
|
|
cpcap_usb_init_optional_gpios(ddata); |
|
|
|
error = cpcap_usb_init_iio(ddata); |
|
if (error) |
|
goto out_reg_disable; |
|
|
|
error = cpcap_usb_init_interrupts(pdev, ddata); |
|
if (error) |
|
goto out_reg_disable; |
|
|
|
usb_add_phy_dev(&ddata->phy); |
|
atomic_set(&ddata->active, 1); |
|
schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1)); |
|
|
|
return 0; |
|
|
|
out_reg_disable: |
|
regulator_disable(ddata->vusb); |
|
|
|
return error; |
|
} |
|
|
|
static int cpcap_usb_phy_remove(struct platform_device *pdev) |
|
{ |
|
struct cpcap_phy_ddata *ddata = platform_get_drvdata(pdev); |
|
int error; |
|
|
|
atomic_set(&ddata->active, 0); |
|
error = cpcap_usb_set_uart_mode(ddata); |
|
if (error) |
|
dev_err(ddata->dev, "could not set UART mode\n"); |
|
|
|
cpcap_usb_try_musb_mailbox(ddata, MUSB_VBUS_OFF); |
|
|
|
usb_remove_phy(&ddata->phy); |
|
cancel_delayed_work_sync(&ddata->detect_work); |
|
regulator_disable(ddata->vusb); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver cpcap_usb_phy_driver = { |
|
.probe = cpcap_usb_phy_probe, |
|
.remove = cpcap_usb_phy_remove, |
|
.driver = { |
|
.name = "cpcap-usb-phy", |
|
.of_match_table = of_match_ptr(cpcap_usb_phy_id_table), |
|
}, |
|
}; |
|
|
|
module_platform_driver(cpcap_usb_phy_driver); |
|
|
|
MODULE_ALIAS("platform:cpcap_usb"); |
|
MODULE_AUTHOR("Tony Lindgren <[email protected]>"); |
|
MODULE_DESCRIPTION("CPCAP usb phy driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|