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nuttx/drivers/usbmisc/fusb302.c
Petro Karashchenko 61e996af33 drivers/usbmisc: remove redundant scope in switch/case 
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
2023-03-09 16:27:07 -03:00

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/****************************************************************************
* drivers/usbmisc/fusb302.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <debug.h>
#include <nuttx/compiler.h>
#include <nuttx/fs/fs.h>
#include <nuttx/kmalloc.h>
#include <nuttx/mutex.h>
#include <nuttx/wqueue.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/usb/fusb302.h>
#include <sys/ioctl.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef FUSB302_I2C_FREQUENCY
# define FUSB302_I2C_FREQUENCY 1000000
#endif
#ifdef CONFIG_DEBUG_USB_ERROR
# define fusb302_err(x, ...) _err(x, ##__VA_ARGS__)
#else
# define fusb302_err(x, ...) uerr(x, ##__VA_ARGS__)
#endif
#if defined(CONFIG_DEBUG_USB_INFO) || defined (CONFIG_DEBUG_FUSB302_REG)
# define fusb302_info(x, ...) _info(x, ##__VA_ARGS__)
#else
# define fusb302_info(x, ...) uinfo(x, ##__VA_ARGS__)
#endif
#define FUSB302_I2C_RETRIES 10
/* Switches0 - 0x02 */
#define SWITCHES0_PULLDOWN_CC1 (1 << 0)
#define SWITCHES0_PULLDOWN_CC2 (1 << 1)
#define SWITCHES0_PULLDOWN_SHIFT (0)
#define SWITCHES0_PULLDOWN_MASK (3 << SWITCHES0_PULLDOWN_SHIFT)
#define SWITCHES0_MEASURE_CC1 (1 << 2)
#define SWITCHES0_MEASURE_CC2 (1 << 3)
#define SWITCHES0_MEASURE_SHIFT (3)
#define SWITCHES0_MEASURE_MASK (3 << SWITCHES0_MEASURE_SHIFT)
#define SWITCHES0_VCONN_CC1 (1 << 4)
#define SWITCHES0_VCONN_CC2 (1 << 5)
#define SWITCHES0_VCONN_SHIFT (4)
#define SWITCHES0_VCONN_MASK (3 << SWITCHES0_VCONN_SHIFT)
#define SWITCHES0_PULLUP_CC1 (1 << 6)
#define SWITCHES0_PULLUP_CC2 (1 << 7)
#define SWITCHES0_PULLUP_SHIFT (6)
#define SWITCHES0_PULLUP_MASK (3 << SWITCHES0_PULLUP_SHIFT)
/* Switches1 */
#define SWITCHES1_TXCC1_MASK (1 << 0)
#define SWITCHES1_TXCC2_MASK (1 << 1)
#define SWITCHES1_AUTO_CRC_MASK (1 << 2)
#define SWITCHES1_DATAROLE_MASK (1 << 3)
#define SWITCHES1_SPECREV_SHIFT (1 << 5) /* Bits 6:5 Specrole */
#define SWITCHES1_SPECREV_MASK (0x03 << 6)
#define SWITCHES1_SPECREV(n) ((uint8_t)(n) << SWITCHES1_SPECREV_SHIFT)
#define SWITCHES1_POWERROLE_MASK (1 << 6)
/* Measure - 0x04 */
#define MEASURE_MDAC_SHIFT (0) /* Bits 5:0 MDAC */
#define MEASURE_MDAC_MASK (0b111111 << MEASURE_MDAC_SHIFT)
#define MEASURE_MDAC(n) ((uint8_t)(n)) << MEASURE_MDAC_SHIFT
#define MEASURE_VBUS_BY_MDAC (1 << 6)
#define SET_MDAC(n) ((uint8_t)(n)) << MEASURE_MDAC_SHIFT)
/* Slice - 0x05 */
#define MEASURE_SDAC_SHIFT (0) /* Bits 5:0 SDAC */
#define MEASURE_SDAC_MASK (0b111111 < MEASURE_SDAC_SHIFT)
#define MEASURE_SDAC(n) ((uint8_t)(n)) << MEASURE_SDAC_SHIFT)
#define MEASURE_SDAC_HYS_SHIFT (6) /* Bits 7:6 SDAC hysteris */
#define MEASURE_SDAC_HYS_MASK (0b11 << MEASURE_SDAC_HYS_SHIFT)
#define SDAC_HYS_VAL(n) ((uint8)t)(n)) << MEASURE_SDAC_HYS_SHIFT)
/* Control0 - 0x06 */
#define CONTROL0_TX_START_MASK (1 << 0)
#define CONTROL0_AUTO_PRE_SHIFT (1)
#define CONTROL0_HOST_CUR_SHIFT (2) /* Bits 3:2 Host Current mode */
#define CONTROL0_HOST_CUR_MASK (3 << CONTROL0_HOST_CUR_SHIFT)
#define HOST_CURRENT_NONE (0) /* no current */
#define HOST_CURRENT_80UA (1) /* default USB power */
#define HOST_CURRENT_180UA (2) /* medium power, 1.5A */
#define HOST_CURRENT_330UA (3) /* high power, 3A */
#define HOST_CURRENT(n) ((uint8_t)(n) << CONTROL0_HOST_CUR_SHIFT)
#define CONTROL0_INT_MASK (1 << 5)
#define CONTROL0_TX_FLUSH (1 << 6)
/* Control1 - 0x07 */
#define CONTROL1_ENSOP1_MASK (1 << 0)
#define CONTROL1_ENSOP2_MASK (1 << 1)
#define CONTROL1_RXFLUSH_MASK (1 << 2)
#define CONTROL1_BIST_MODE2_MASK (1 << 4)
#define CONTROL1_ENSOP1DB_MASK (1 << 5)
#define CONTROL1_ENSOP2DB_MASK (1 << 6)
/* Control2 - 0x08 */
#define CONTROL2_TOGGLE (1 << 0)
#define CONTROL2_MODE_SHIFT (1) /* Bits 2:1 */
#define CONTROL2_MODE_MASK (0b11 << CONTROL2_MODE_SHIFT)
#define SRC_POLLING (0b11)
#define SNK_POLLING (0b10)
#define DRP_POLLING (0b01)
#define SET_POLL_MODE(n) ((uint8_t)(n) << CONTROL2_MODE_SHIFT)
#define CONTROL2_WAKE_EN (1 << 3)
#define CONTROL2_TOG_RD_ONLY (1 << 5)
#define CONTROL2_TOG_SAVE_PWR_SHIFT (6) /* Bits 7:6 */
#define CONTROL2_TOG_SAVE_PWR_MASK (0b11 << CONTROL2_TOG_SAVE_PWR_SHIFT
#define WAIT_NONE (0b00)
#define WAIT_40MS (0b01)
#define WAIT_80MS (0b10)
#define WAIT_160MS (0b11)
#define SET_WAIT_MODE(n) (((uint8_t)(n) << CONTROL2_TOG_SAVE_PWR_SHIFT)
/* Control3 - 0x09 */
#define CONTROL3_AUTO_RETRY (0)
#define CONTROL3_N_RETRIES_SHIFT (1) /* Bits 2:1 */
#define CONTROL3_N_RETRIES_MASK (0b11 << CONTROL3_N_RETRIES_SHIFT)
#define NO_RETRIES (0b00)
#define ONE_RETRIES (0b01)
#define TWO_RETRIES (0b10)
#define THREE_RETRIES (0b11)
#define SET_NUM_RETRIES(n) ((uint8_t(n) << CONTROL3_N_RETRIES_SHIFT)
#define CONTROL3_AUTO_SOFTRESET (1 << 3)
#define CONTROL3_AUTO_HARDRESET (1 << 4)
#define CONTROL3_SEND_HARDRESET (1 << 6)
/* Mask - 0x0A */
#define MASK_BC_LVL (1 << 0)
#define MASK_COLLISION (1 << 1)
#define MASK_WAKE (1 << 2)
#define MASK_ALERT (1 << 3)
#define MASK_CRC_CHK (1 << 4)
#define MASK_COMP_CHNG (1 << 5)
#define MASK_ACTIVITY (1 << 6)
#define MASK_VBUS_OK (1 << 7)
#define MASK_ALL (0xff)
#define MASK_FOR_DISCONNECT (MASK_VBUS_OK | MASK_COMP_CHNG)
/* Power 0x0B */
#define POWER_PWR_SHIFT (0) /* Bits 3:0 */
#define POWER_PWR_MASK (15 << POWER_PWR_SHIFT)
#define POWER_MODE_ALL (15)
#define POWER_MODE_TOGGLING (7)
#define POWER_MODE_BANDGAP_AND_WAKE (1)
#define POWER_MODE_RX_AND_IREF (2)
#define POWER_MODE_MEASURE_BLOCK (4)
#define POWER_MODE_MEASURE_INT_OSC (8)
#define POWER_MODE(n) ((uint8_t)(n) << POWER_PWR_SHIFT)
/* Reset 0x0C */
#define RESET_SW_RESET (1 << 0)
#define RESET_PD_RESET (1 << 1)
/* OCPreg = 0x0D */
#define OCPREG_CUR_SHIFT (0) /* Bits 2:0 */
#define OCPREG_CUR_MASK (0b111 << OCPREG_CUR_SHIFT)
#define X1_MAX_RANGE_DIV8 (0b000)
#define X2_MAX_RANGE_DIV8 (0b001)
#define X3_MAX_RANGE_DIV8 (0b010)
#define X4_MAX_RANGE_DIV8 (0b011)
#define X5_MAX_RANGE_DIV8 (0b100)
#define X6_MAX_RANGE_DIV8 (0b101)
#define X7_MAX_RANGE_D (0b110)
#define MAX_RANGE (0b111)
#define SET_OCP_RANGE(n) ((uint8_t)(n) << OCPREG_CUR_SHIFT)
#define OCPREF_OCP_RANGE (1 << 3)
/* MaskA - 0x0E */
#define MASKA_HARDRST (1 << 0)
#define MASKA_SOFTRST (1 << 1)
#define MASKA_TXSENT (1 << 2)
#define MASKA_HARDSENT (1 << 3)
#define MASKA_RETRYFAIL (1 << 4)
#define MASKA_SOFTFAIL (1 << 5)
#define MASKA_TOGDONE (1 << 6)
#define MASKA_OCP_TEMP (1 << 7)
/* MaskB - 0x0F */
#define MASKB_GCRCSENT (1 << 0)
/* Control4 - 0x10 */
#define CONTROL4_TOG_USRC_EXIT (1 << 0)
/* Status0a - 0x3c */
#define STATUS0A_HARDRST (1 << 0)
#define STATUS0A_SOFTRST (1 << 1)
#define STATUS0A_POWER_SHIFT (2) /* Bits 3:2 */
#define STATUS0A_POWER_MASK (0b11 << STATUS0A_POWER_SHIFT)
#define STATUS0A_RETRYFAIL (1 << 4)
#define STATUS0A_SOFTFAIL (1 << 5)
/* Status1a - 0x3D */
#define STATUS1A_RXSOP (1 << 0)
#define STATUS1A_RXSOP1DB (1 << 1)
#define STATUS1A_RXSOP2DB (1 << 2)
#define STATUS1A_TOGGS_SHIFT (3) /* Bits 5:3 */
#define STATUS1A_TOGGS_MASK (7 << STATUS1A_TOGGS_SHIFT)
#define TOGGS_RUNNING (0)
#define TOGGS_SRC_CC1 (1)
#define TOGGS_SRC_CC2 (2)
#define TOGGS_SNK_CC1 (5)
#define TOGGS_SNK_CC2 (6)
#define TOGGS_AUDIO_ACCESSORY (7)
#define DECODE_TOGGS(n) ((uint8_t)(n) >> STATUS1A_TOGGS_SHIFT)
/* InterruptA - 0x3E */
#define INTERRUPTA_M_HARDRST (1 << 0)
#define INTERRUPTA_M_SOFTRST (1 << 1)
#define INTERRUPTA_M_TXSENT (1 << 2)
#define INTERRUPTA_M_HARDSENT (1 << 3)
#define INTERRUPTA_M_RETRYFAIL (1 << 4)
#define INTERRUPTA_M_SOFTFAIL (1 << 5)
#define INTERRUPTA_M_TOGDONE (1 << 6)
#define INTERRUPTA_M_OCP_TEMP (1 << 7)
/* InterruptB - 0x3F */
#define INTERRUPTB_I_GCRCSENT (1 << 0)
/* Status0 - 0x40 */
#define STATUS0_BC_LVL_SHIFT (0) /* Bits 1:0 */
#define STATUS0_BC_LVL_MASK (0b11 << STATUS0_BC_LVL_SHIFT)
#define STATUS0_WAKE (1 << 2)
#define STATUS0_ALERT (1 << 3)
#define STATUS0_CRC_OK (1 << 4)
#define STATUS0_COMP (1 << 5)
#define STATUS0_ACTIVITY (1 << 6)
#define STATUS0_VBUS_OK (1 << 7)
/* Status1 - 0x41 */
#define STATUS1_OCP (1 << 0)
#define STATUS1_OVRTEMP (1 << 1)
#define STATUS1_TX_FULL (1 << 2)
#define STATUS1_TX_EMPTY (1 << 3)
#define STATUS1_RX_FULL (1 << 4)
#define STATUS1_RX_EMPTY (1 << 5)
#define STATUS1A_RXSOP1 (1 << 6)
#define STATUS1A_RXSOP2 (1 << 7)
/* Interrupt - 0x42 */
#define INTERRUPT_BC_LVL (1 << 0)
#define INTERRUPT_COLLISION_ (1 << 1)
#define INTERRUPT_WAKE (1 << 2)
#define INTERRUPT_ALERT (1 << 3)
#define INTERRUPT_CRC_OK (1 << 4)
#define INTERRUPT_COMP_CHNG (1 << 5)
#define INTERRUPT_ACTIVITY (1 << 6)
#define INTERRUPT_VBUS_OK (1 << 7)
/* FIFOs - 0x43 */
#define FIFOS_TX_RX_TOKEN (1 << 0)
/****************************************************************************
* Private Data Types
****************************************************************************/
enum fusb302_state_e
{
RESET = 0,
WAITING_FOR_DRP_TOGG_I,
WAITING_FOR_SNK_TOGG_I,
WAITING_FOR_SRC_TOGG_I,
WAITING_FOR_VBUS,
WAITING_FOR_COMP_CHNG,
WAITING_FOR_SRC_DISCONNECT,
WAITING_FOR_SNK_DISCONNECT,
WAITING_FOR_HOST_INTERVENTION,
NOT_DEFINED,
};
enum cc_pd_e
{
CC1_PULLDOWN = SWITCHES0_PULLDOWN_CC1,
CC2_PULLDOWN = SWITCHES0_PULLDOWN_CC2,
};
enum cc_pu_e
{
CC1_PULLUP = SWITCHES0_PULLUP_CC1,
CC2_PULLUP = SWITCHES0_PULLUP_CC2,
};
enum cc_vconn_e
{
CC1_VCONN = SWITCHES0_VCONN_CC1,
CC2_VCONN = SWITCHES0_VCONN_CC2,
};
enum cc_meas_e
{
CC1_MEASURE = SWITCHES0_MEASURE_CC1,
CC2_MEASURE = SWITCHES0_MEASURE_CC2,
};
enum src_current_e
{
SRC_CURRENT_DEFAULT,
SRC_CURRENT_MEDIUM,
SRC_CURRENT_HIGH,
};
struct fusb302_dev_s
{
FAR struct pollfd *fds[CONFIG_FUSB302_NPOLLWAITERS];
uint8_t i2c_addr; /* I2C address */
volatile bool int_pending; /* Interrupt pending */
mutex_t devlock; /* Manages exclusive access */
FAR struct fusb302_config_s *config; /* Platform specific config */
struct work_s work; /* Supports interrupt handling */
enum fusb302_state_e state; /* worker state machine */
enum fusb_connect_status_e connect_status; /* USB device connection state */
};
static const uint8_t src_mdac_val[] =
{
[SRC_CURRENT_DEFAULT] = 0x25, /* 1600mV */
[SRC_CURRENT_MEDIUM] = 0x25, /* 1600mV */
[SRC_CURRENT_HIGH] = 0x3d, /* 2600mV */
};
struct fusb302_result_s
{
enum fusb_connect_status_e connected_state;
enum fusb302_state_e state;
};
struct fusb302_setup_s
{
uint8_t drp_toggle_timing;
uint8_t host_current;
uint8_t int_mask;
bool global_int_mask;
};
enum fusb302_reg_address_e
{
FUSB302_DEV_ID_REG = 0x01,
FUSB302_SWITCHES0_REG,
FUSB302_SWITCHES1_REG,
FUSB302_MEASURE_REG,
FUSB302_SLICE_REG,
FUSB302_CONTROL0_REG,
FUSB302_CONTROL1_REG,
FUSB302_CONTROL2_REG,
FUSB302_CONTROL3_REG,
FUSB302_MASK_REG,
FUSB302_POWER_REG,
FUSB302_RESET_REG,
FUSB302_OCPREG_REG,
FUSB302_MASKA_REG,
FUSB302_MASKB_REG,
FUSB302_CONTROL4_REG,
FUSB302_STATUS0A_REG = 0x3c,
FUSB302_STATUS1A_REG,
FUSB302_INTERRUPTA_REG,
FUSB302_INTERRUPTB_REG,
FUSB302_STATUS0_REG,
FUSB302_STATUS1_REG,
FUSB302_INTERRUPT_REG,
FUSB302_FIFOS_REG,
};
/****************************************************************************
* Private Function prototypes
****************************************************************************/
static int fusb302_open(FAR struct file *filep);
static int fusb302_close(FAR struct file *filep);
static ssize_t fusb302_read(FAR struct file *, FAR char *, size_t);
static ssize_t fusb302_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
static int fusb302_ioctl(FAR struct file *filep, int cmd,
unsigned long arg);
static int fusb302_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
static int fusb302_putreg(FAR struct fusb302_dev_s *priv,
uint8_t regaddr, uint8_t regval);
static int fusb302_getreg(FAR struct fusb302_dev_s *priv, uint8_t reg);
#ifdef CONFIG_DEBUG_FUSB302_REG
static void fusb302_dump_registers(FAR struct fusb302_dev_s *priv,
FAR const char *msg);
#else
# define fusb302_dump_registers(priv, msg);
#endif
static int fusb302_clear_interrupts(FAR struct fusb302_dev_s * priv);
static int fusb302_reset(FAR struct fusb302_dev_s *priv);
static int fusb302_set_mode(FAR struct fusb302_dev_s *priv,
enum fusb302_mode_e mode);
static int fusb302_int_handler(int irq, FAR void *context,
FAR void *arg);
static void fusb302_worker(FAR void *arg);
static int fusb302_schedule(FAR struct fusb302_dev_s *priv);
void enableccpd(FAR struct fusb302_dev_s *priv,
enum cc_pd_e pulldown, bool enable);
void enableccpu(FAR struct fusb302_dev_s *priv,
enum cc_pu_e pullup, bool enable);
void enablevconn(FAR struct fusb302_dev_s *priv,
enum cc_vconn_e vconn, bool enable);
void enableccmeas(FAR struct fusb302_dev_s *priv,
enum cc_meas_e pullup, bool enable);
void set_switches(FAR struct fusb302_dev_s *priv,
uint8_t toggsval);
static int set_int_mask(struct fusb302_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations g_fusb302ops =
{
fusb302_open, /* open */
fusb302_close, /* close */
fusb302_read, /* read */
fusb302_write, /* write */
NULL, /* seek */
fusb302_ioctl, /* ioctl */
NULL, /* mmap */
NULL, /* truncate */
fusb302_poll, /* poll */
};
/****************************************************************************
* Private Functions
****************************************************************************/
static int set_int_mask(struct fusb302_dev_s *priv)
{
int ret = OK;
switch (priv->state)
{
case WAITING_FOR_DRP_TOGG_I:
case WAITING_FOR_SNK_TOGG_I:
case WAITING_FOR_SRC_TOGG_I:
ret = fusb302_putreg(priv, FUSB302_MASK_REG,
(uint8_t) ~MASKA_TOGDONE);
ret = fusb302_putreg(priv, FUSB302_MASKA_REG,
(uint8_t) MASKA_HARDRST);
ret = fusb302_putreg(priv, FUSB302_MASKB_REG,
(uint8_t) MASKB_GCRCSENT);
break;
case WAITING_FOR_VBUS:
ret = fusb302_putreg(priv, FUSB302_MASK_REG,
((uint8_t) ~MASK_VBUS_OK) |
((uint8_t) ~MASK_BC_LVL) |
((uint8_t) ~MASK_COMP_CHNG));
break;
case WAITING_FOR_COMP_CHNG:
ret = fusb302_putreg(priv, FUSB302_MASK_REG,
(uint8_t) ~MASK_COMP_CHNG);
break;
case WAITING_FOR_SRC_DISCONNECT:
ret = fusb302_putreg(priv, FUSB302_MASK_REG,
(uint8_t) ~MASK_COMP_CHNG);
break;
case WAITING_FOR_SNK_DISCONNECT:
ret = fusb302_putreg(priv, FUSB302_MASK_REG,
(uint8_t) ~MASK_VBUS_OK);
break;
case WAITING_FOR_HOST_INTERVENTION:
case NOT_DEFINED:
default:
break;
}
return ret;
}
/****************************************************************************
* Name: enableccpd
*
* Description:
* Enable/disable CCx pulldown resistors
*
* Input Parameters:
* priv - pointer to device structure
* pulldown - CC1 or CC2
* enable - enable or disable it
*
* Returned Value:
* none
*
****************************************************************************/
void enableccpd(struct fusb302_dev_s *priv, enum cc_pd_e pulldown,
bool enable)
{
int regval;
regval = fusb302_getreg(priv, FUSB302_SWITCHES0_REG);
if (enable)
{
regval |= pulldown;
}
else
{
regval &= ~pulldown;
}
fusb302_putreg(priv, FUSB302_SWITCHES0_REG, regval);
}
/****************************************************************************
* Name: enableccpu
*
* Description:
* Enable/disable CCx pulldown resistors
*
* Input Parameters:
* priv - pointer to device structure
* pulldown - CC1 or CC2
* enable - enable or disable it
*
* Returned Value:
* none
*
****************************************************************************/
void enableccpu(struct fusb302_dev_s *priv, enum cc_pu_e pullup, bool enable)
{
int regval;
regval = fusb302_getreg(priv, FUSB302_SWITCHES0_REG);
if (enable)
{
regval |= pullup;
}
else
{
regval &= ~pullup;
}
fusb302_putreg(priv, FUSB302_SWITCHES0_REG, regval);
}
/****************************************************************************
* Name: enableccmeas
*
* Description:
* Enable/disable CC measurement
*
* Input Parameters:
* priv - pointer to device structure
* measure - CC1 or CC2
* enable - enable or disable it
*
* Returned Value:
* none
*
****************************************************************************/
void enableccmeas(struct fusb302_dev_s *priv, enum cc_meas_e measure,
bool enable)
{
int regval;
regval = fusb302_getreg(priv, FUSB302_SWITCHES0_REG);
if (enable)
{
regval |= measure;
}
else
{
regval &= ~measure;
}
fusb302_putreg(priv, FUSB302_SWITCHES0_REG, regval);
}
/****************************************************************************
* Name: setmdac
*
* Description:
* Set MDAC measurement threshold
*
* Input Parameters:
* priv - pointer to device structure
* threhold - MDAC threshold value
*
* Returned Value:
* none
*
****************************************************************************/
void setmdac(struct fusb302_dev_s *priv, enum src_current_e thresh)
{
int regval;
regval = fusb302_getreg(priv, FUSB302_MEASURE_REG);
regval &= ~MEASURE_MDAC_MASK;
regval |= MEASURE_MDAC(src_mdac_val[thresh]);
fusb302_putreg(priv, FUSB302_MEASURE_REG, regval);
usleep(150);
}
/****************************************************************************
* Name: enablevconn
*
* Description:
* Enable/disable Vconn supply for host mode
*
* Input Parameters:
* priv - pointer to device structure
* vconn - CC1 or CC2
* enable - enable or disable it
*
* Returned Value:
* none
*
****************************************************************************/
void enablevconn(FAR struct fusb302_dev_s *priv, enum cc_vconn_e vconn,
bool enable)
{
int regval;
regval = fusb302_getreg(priv, FUSB302_SWITCHES0_REG);
if (enable)
{
regval |= vconn;
}
else
{
regval &= ~vconn;
}
fusb302_putreg(priv, FUSB302_SWITCHES0_REG, regval);
}
/****************************************************************************
* Name: set_switches
*
* Description:
* Set up switches for required operational mode
*
* Input Parameters:
* priv - pointer to device structure
* toggsval - the value read after toggling is done
* enable - enable or disable it
*
* Returned Value:
* none
*
****************************************************************************/
void set_switches(FAR struct fusb302_dev_s *priv,
uint8_t toggsval)
{
/* what device detect type was seen */
switch (toggsval)
{
case TOGGS_SRC_CC1:
{
enableccpd(priv, CC1_PULLDOWN, false);
enableccpd(priv, CC2_PULLDOWN, false);
enableccpu(priv, CC1_PULLUP, true);
enableccpu(priv, CC2_PULLUP, false);
enablevconn(priv, CC1_VCONN, false);
enablevconn(priv, CC2_VCONN, true);
enableccmeas(priv, CC1_MEASURE, true);
enableccmeas(priv, CC2_MEASURE, false);
setmdac(priv, SRC_CURRENT_DEFAULT);
}
break;
case TOGGS_SRC_CC2:
{
enableccpd(priv, CC1_PULLDOWN, false);
enableccpd(priv, CC2_PULLDOWN, false);
enableccpu(priv, CC1_PULLUP, false);
enableccpu(priv, CC2_PULLUP, true);
enablevconn(priv, CC1_VCONN, true);
enablevconn(priv, CC2_VCONN, false);
enableccmeas(priv, CC1_MEASURE, false);
enableccmeas(priv, CC2_MEASURE, true);
setmdac(priv, SRC_CURRENT_DEFAULT);
}
break;
case TOGGS_SNK_CC1:
{
enablevconn(priv, CC1_VCONN, false);
enablevconn(priv, CC2_VCONN, false);
enableccpu(priv, CC1_PULLUP, false);
enableccpd(priv, CC2_PULLUP, false);
enablevconn(priv, CC1_VCONN, false);
enablevconn(priv, CC2_VCONN, false);
enableccpd(priv, CC1_PULLDOWN, true);
enableccpd(priv, CC2_PULLDOWN, false);
}
break;
case TOGGS_SNK_CC2:
{
enablevconn(priv, CC1_VCONN, false);
enablevconn(priv, CC2_VCONN, false);
enableccpu(priv, CC1_PULLUP, false);
enableccpu(priv, CC2_PULLUP, false);
enablevconn(priv, CC1_VCONN, false);
enablevconn(priv, CC2_VCONN, false);
enableccpd(priv, CC1_PULLDOWN, false);
enableccpd(priv, CC2_PULLDOWN, true);
}
break;
case TOGGS_AUDIO_ACCESSORY:
enableccpd(priv, CC1_PULLDOWN, false);
enableccpd(priv, CC2_PULLDOWN, false);
enableccpu(priv, CC1_PULLUP, true);
enableccpu(priv, CC2_PULLUP, false);
enablevconn(priv, CC1_VCONN, false);
enablevconn(priv, CC2_VCONN, true);
enableccmeas(priv, CC1_MEASURE, true);
enableccmeas(priv, CC2_MEASURE, false);
setmdac(priv, SRC_CURRENT_DEFAULT);
break;
default:
fusb302_err("ERROR: invalid TOGGS VAL read:%d\n", toggsval);
break;
}
}
/****************************************************************************
* Name: fusb302_worker
*
* Description:
* Worker task to deal with device state machine
*
* Input Parameters:
* arg - Pointer to device
*
* Returned Value:
* OK
*
****************************************************************************/
static void fusb302_worker(FAR void *arg)
{
FAR struct fusb302_dev_s *priv = (FAR struct fusb302_dev_s *)arg;
FAR struct fusb302_config_s *config;
int regval;
int toggsval;
int interrupt;
int interrupta;
DEBUGASSERT(priv != NULL);
config = priv->config;
DEBUGASSERT(config != NULL);
nxmutex_lock(&priv->devlock);
if (!priv->int_pending) /* just to double check we really should be here */
{
fusb302_err("ERROR: worker task run with no interrupt\n");
goto error_exit;
}
else
{
/* do statemachine */
interrupt = fusb302_getreg(priv, FUSB302_INTERRUPT_REG);
interrupta = fusb302_getreg(priv, FUSB302_INTERRUPTA_REG);
switch (priv->state)
{
case WAITING_FOR_DRP_TOGG_I:
if (interrupta & INTERRUPTA_M_TOGDONE)
{
/* What has connected? */
regval = fusb302_getreg(priv, FUSB302_STATUS1A_REG);
toggsval = DECODE_TOGGS(regval & STATUS1A_TOGGS_MASK);
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
fusb302_info("INFO: toggs val=%x\n", toggsval);
/* set everything up depending on what's been detected */
set_switches(priv, toggsval);
/* Power up Internal Oscillator as well now */
fusb302_putreg(priv, FUSB302_POWER_REG,
POWER_MODE_ALL);
fusb302_dump_registers(priv,
"After DRP toggle detect handling");
switch (toggsval)
{
case TOGGS_RUNNING:
break;
case TOGGS_SNK_CC1:
case TOGGS_SNK_CC2:
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
if ((interrupt & INTERRUPT_VBUS_OK) ||
(regval & STATUS0_VBUS_OK) ||
(regval & STATUS0_BC_LVL_MASK))
{
priv->state = WAITING_FOR_SNK_DISCONNECT;
priv->connect_status = SNK_DEVICE_CONNECTED;
}
else
{
priv->state = WAITING_FOR_VBUS;
}
break;
case TOGGS_SRC_CC1:
case TOGGS_SRC_CC2:
case TOGGS_AUDIO_ACCESSORY:
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
priv->state = WAITING_FOR_SRC_DISCONNECT;
priv->connect_status = SRC_DEVICE_CONNECTED;
break;
default:
priv->connect_status = UNKNOWN_CONNECTED;
goto error_exit;
break;
}
/* turn off toggling */
regval = fusb302_getreg(priv, FUSB302_CONTROL2_REG);
regval &= ~CONTROL2_TOGGLE;
fusb302_putreg(priv, FUSB302_CONTROL2_REG, regval);
/* Send new interrupt mask */
set_int_mask(priv);
}
break;
case WAITING_FOR_VBUS:
if (interrupt & INTERRUPT_VBUS_OK)
{
if (priv->connect_status == NOTHING_CONNECTED)
{
priv->state = WAITING_FOR_SNK_DISCONNECT;
priv->connect_status = SNK_DEVICE_CONNECTED;
}
else if (priv->connect_status == SNK_DEVICE_CONNECTED)
{
priv->state = WAITING_FOR_HOST_INTERVENTION;
priv->connect_status = SNK_DETACH_DETECTED;
}
}
else
{
priv->state = NOT_DEFINED;
goto error_exit;
}
/* Send new interrupt mask */
set_int_mask(priv);
break;
case WAITING_FOR_COMP_CHNG:
if (interrupt & INTERRUPT_COMP_CHNG)
{
if (priv->connect_status == NOTHING_CONNECTED)
{
priv->state = WAITING_FOR_SRC_DISCONNECT;
priv->connect_status = SRC_DEVICE_CONNECTED;
}
else if (priv->connect_status == SRC_DEVICE_CONNECTED)
{
priv->state = WAITING_FOR_HOST_INTERVENTION;
priv->connect_status = SRC_DETACH_DETECTED;
}
}
else
{
priv->state = NOT_DEFINED;
goto error_exit;
}
break;
case WAITING_FOR_SNK_TOGG_I:
if (interrupta & INTERRUPTA_M_TOGDONE)
{
/* Check what has connected? */
regval = fusb302_getreg(priv, FUSB302_STATUS1A_REG);
toggsval = DECODE_TOGGS(regval & STATUS1A_TOGGS_MASK);
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
fusb302_info("INFO: toggs val=%x\n", toggsval);
/* set everything up depending on what's been detected */
set_switches(priv, toggsval);
/* Power up Internal Oscillator as well now */
fusb302_putreg(priv, FUSB302_POWER_REG,
POWER_MODE_ALL);
fusb302_dump_registers(priv,
"After SNK toggle detect handling");
switch (toggsval)
{
case TOGGS_RUNNING:
break;
case TOGGS_SNK_CC1:
case TOGGS_SNK_CC2:
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
if ((interrupt & INTERRUPT_VBUS_OK) ||
(regval & STATUS0_VBUS_OK) ||
(regval & STATUS0_BC_LVL_MASK))
{
priv->state = WAITING_FOR_SNK_DISCONNECT;
priv->connect_status = SNK_DEVICE_CONNECTED;
}
else
{
priv->state = WAITING_FOR_VBUS;
}
break;
case TOGGS_SRC_CC1:
case TOGGS_SRC_CC2:
case TOGGS_AUDIO_ACCESSORY:
default:
priv->connect_status = UNKNOWN_CONNECTED;
goto error_exit;
break;
}
/* turn off toggling */
regval = fusb302_getreg(priv, FUSB302_CONTROL2_REG);
regval &= ~CONTROL2_TOGGLE;
fusb302_putreg(priv, FUSB302_CONTROL2_REG, regval);
/* Send new interrupt mask */
set_int_mask(priv);
}
break;
case WAITING_FOR_SRC_TOGG_I:
if (interrupta & INTERRUPTA_M_TOGDONE)
{
/* Check what has connected? */
regval = fusb302_getreg(priv, FUSB302_STATUS1A_REG);
toggsval = DECODE_TOGGS(regval & STATUS1A_TOGGS_MASK);
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
fusb302_info("INFO: toggs val=%x\n", toggsval);
/* set everything up depending on what's been detected */
set_switches(priv, toggsval);
/* Power up Internal Oscillator as well now */
fusb302_putreg(priv, FUSB302_POWER_REG,
POWER_MODE_ALL);
fusb302_dump_registers(priv,
"After SRC toggle detect handling");
switch (toggsval)
{
case TOGGS_RUNNING:
break;
case TOGGS_SRC_CC1:
case TOGGS_SRC_CC2:
case TOGGS_AUDIO_ACCESSORY:
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
priv->state = WAITING_FOR_SRC_DISCONNECT;
priv->connect_status = SRC_DEVICE_CONNECTED;
break;
case TOGGS_SNK_CC1:
case TOGGS_SNK_CC2:
default:
priv->connect_status = UNKNOWN_CONNECTED;
goto error_exit;
break;
}
/* turn off toggling */
regval = fusb302_getreg(priv, FUSB302_CONTROL2_REG);
regval &= ~CONTROL2_TOGGLE;
fusb302_putreg(priv, FUSB302_CONTROL2_REG, regval);
/* Send new interrupt mask */
set_int_mask(priv);
}
break;
case WAITING_FOR_SRC_DISCONNECT:
if ((priv->connect_status != SRC_DEVICE_CONNECTED) &&
(priv->connect_status != AUDIO_ACCESSORY_CONNECTED))
{
priv->connect_status = CONNECT_ERROR;
priv->state = WAITING_FOR_HOST_INTERVENTION;
}
else if (interrupt & INTERRUPT_COMP_CHNG)
{
priv->connect_status = SRC_DETACH_DETECTED;
priv->state = WAITING_FOR_HOST_INTERVENTION;
}
else if (interrupt & INTERRUPT_BC_LVL)
{
priv->connect_status = BC_LEVEL_CHANGE_REQUSTED;
}
break;
case WAITING_FOR_SNK_DISCONNECT:
regval = fusb302_getreg(priv, FUSB302_STATUS0_REG);
if (regval & STATUS0_VBUS_OK)
/* A USB3 device can cause a spurious VBUS OK here.
* A USB2 device doesn't.
*/
break;
if (priv->connect_status != SNK_DEVICE_CONNECTED)
{
priv->connect_status = CONNECT_ERROR;
priv->state = WAITING_FOR_HOST_INTERVENTION;
}
else if (interrupt & INTERRUPT_VBUS_OK)
{
priv->connect_status = SNK_DETACH_DETECTED;
priv->state = WAITING_FOR_HOST_INTERVENTION;
}
else if (interrupt & INTERRUPT_BC_LVL)
{
priv->connect_status = BC_LEVEL_CHANGE_REQUSTED;
}
break;
case WAITING_FOR_HOST_INTERVENTION:
/* the higher level software has not dealt with the previous
* response yet so we notify this as an error
*/
priv->connect_status = CONNECT_ERROR;
break;
default:
fusb302_info("state not defined yet\n");
fusb302_reset(priv);
break;
}
/* notify any waiters that there's a new state */
fusb302_info("INFO: connection or state change: %d\n",
priv->connect_status);
poll_notify(priv->fds, CONFIG_FUSB302_NPOLLWAITERS, POLLIN);
}
error_exit:
fusb302_clear_interrupts(priv);
/* re-enable interrupt */
priv->int_pending = false;
config->irq_enable(config, true);
/* release lock */
nxmutex_unlock(&priv->devlock);
}
/****************************************************************************
* Name: fusb302_schedule
*
* Description:
* Schedule the state machine work
*
* Input Parameters:
* priv - A reference to the FUSB302 peripheral state
*
* Returned Value:
* OK
*
****************************************************************************/
static int fusb302_schedule(FAR struct fusb302_dev_s *priv)
{
FAR struct fusb302_config_s *config;
int ret;
config = priv->config;
DEBUGASSERT(config != NULL);
DEBUGASSERT(priv->work.worker == NULL);
ret = work_queue(HPWORK, &priv->work, fusb302_worker, priv, 0);
if (ret != 0)
{
fusb302_err("ERROR: Failed to queue work: %d\n", ret);
}
return OK;
}
/****************************************************************************
* Name: fusb302_dumpregs
*
* Description:
* Dump the contents of all FUSB302 registers
*
* Input Parameters:
* priv - A reference to the FUSB302 peripheral state
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_DEBUG_FUSB302_REG
static void fusb302_dump_registers(FAR struct fusb302_dev_s *priv,
FAR const char *msg)
{
fusb302_info("\nFUSB302 Registers: %s\n", msg);
fusb302_info
(" Device id: %02x Switches0: %02x Switch1: %02x Measure: %02x\n",
fusb302_getreg(priv, FUSB302_DEV_ID_REG),
fusb302_getreg(priv, FUSB302_SWITCHES0_REG),
fusb302_getreg(priv, FUSB302_SWITCHES1_REG),
fusb302_getreg(priv, FUSB302_MEASURE_REG));
fusb302_info
(" Slice: %02x Control0: %02x Control1:%02x Control2: %02x\n",
fusb302_getreg(priv, FUSB302_SLICE_REG),
fusb302_getreg(priv, FUSB302_CONTROL0_REG),
fusb302_getreg(priv, FUSB302_CONTROL1_REG),
fusb302_getreg(priv, FUSB302_CONTROL2_REG));
fusb302_info
(" Control3: %02x Mask: %02x Power:%02x Reset: %02x\n",
fusb302_getreg(priv, FUSB302_CONTROL3_REG),
fusb302_getreg(priv, FUSB302_MASK_REG),
fusb302_getreg(priv, FUSB302_POWER_REG),
fusb302_getreg(priv, FUSB302_RESET_REG));
fusb302_info
(" OCPreg: %02x MaskA: %02x MaskB:%02x Control4: %02x\n",
fusb302_getreg(priv, FUSB302_OCPREG_REG),
fusb302_getreg(priv, FUSB302_MASKA_REG),
fusb302_getreg(priv, FUSB302_MASKB_REG),
fusb302_getreg(priv, FUSB302_CONTROL4_REG));
fusb302_info
(" Status0a: %02x Status1a: %02x InterruptA:%02x InterruptB: %02x\n",
fusb302_getreg(priv, FUSB302_STATUS0A_REG),
fusb302_getreg(priv, FUSB302_STATUS1A_REG),
fusb302_getreg(priv, FUSB302_INTERRUPTA_REG),
fusb302_getreg(priv, FUSB302_INTERRUPTB_REG));
fusb302_info
(" Status0: %02x Status1: %02x Interrupt:%02x FIFOs: %02x\n",
fusb302_getreg(priv, FUSB302_STATUS0_REG),
fusb302_getreg(priv, FUSB302_STATUS1_REG),
fusb302_getreg(priv, FUSB302_INTERRUPT_REG),
fusb302_getreg(priv, FUSB302_FIFOS_REG));
}
#endif
/****************************************************************************
* Name: fusb302_getreg
*
* Description:
* Read from an 8-bit FUSB302 register
*
* Input Parameters:
* priv - pointer to FUSB302 Private Structure
* reg - register to read
*
* Returned Value:
* Returns positive register value in case of success, otherwise ERROR
****************************************************************************/
static int fusb302_getreg(FAR struct fusb302_dev_s *priv, uint8_t reg)
{
int ret = -EIO;
int retries;
uint8_t regval;
struct i2c_msg_s msg[2];
DEBUGASSERT(priv);
msg[0].frequency = FUSB302_I2C_FREQUENCY;
msg[0].addr = priv->config->i2c_addr;
msg[0].flags = 0;
msg[0].buffer = &reg;
msg[0].length = 1;
msg[1].frequency = FUSB302_I2C_FREQUENCY;
msg[1].addr = priv->config->i2c_addr;
msg[1].flags = I2C_M_READ;
msg[1].buffer = &regval;
msg[1].length = 1;
/* Perform the transfer */
for (retries = 0; retries < FUSB302_I2C_RETRIES; retries++)
{
ret = I2C_TRANSFER(priv->config->i2c, msg, 2);
if (ret >= 0)
{
return regval;
}
else
{
/* Some error. Try to reset I2C bus and keep trying. */
#ifdef CONFIG_I2C_RESET
if (retries == FUSB302_I2C_RETRIES - 1)
{
break;
}
ret = I2C_RESET(priv->config->i2c);
if (ret < 0)
{
fusb302_err("ERROR: I2C_RESET failed: %d\n", ret);
return ret;
}
#endif
}
}
fusb302_info("reg:%02X, error:%d\n", reg, ret);
return ret;
}
/****************************************************************************
* Name: fusb302_putreg
*
* Description:
* Write a value to an 8-bit FUSB302 register
*
* Input Parameters:
* priv - pointer to FUSB302 Private Structure
* regaddr - register to read
* regval - value to be written
*
* Returned Value:
* None
****************************************************************************/
static int fusb302_putreg(FAR struct fusb302_dev_s *priv, uint8_t regaddr,
uint8_t regval)
{
int ret = -EIO;
int retries;
struct i2c_msg_s msg;
uint8_t txbuffer[2];
/* Setup to the data to be transferred (register address and data). */
txbuffer[0] = regaddr;
txbuffer[1] = regval;
/* Setup 8-bit FUSB302 address write message */
msg.frequency = FUSB302_I2C_FREQUENCY;
msg.addr = priv->config->i2c_addr;
msg.flags = 0;
msg.buffer = txbuffer;
msg.length = 2;
/* Perform the transfer */
for (retries = 0; retries < FUSB302_I2C_RETRIES; retries++)
{
ret = I2C_TRANSFER(priv->config->i2c, &msg, 1);
if (ret == OK)
{
return OK;
}
else
{
/* Some error. Try to reset I2C bus and keep trying. */
#ifdef CONFIG_I2C_RESET
if (retries == FUSB302_I2C_RETRIES - 1)
{
break;
}
ret = I2C_RESET(priv->config->i2c;
if (ret < 0)
{
fusb302_err("ERROR: I2C_RESET failed: %d\n", ret);
return ret;
}
#endif
}
}
fusb302_err("ERROR: failed reg:%02X, value:%02X, error:%d\n",
regaddr, regval, ret);
return ret;
}
/****************************************************************************
* Name: fusb302_read_device_id
*
* Description:
* Read device version and revision IDs
*
****************************************************************************/
static int fusb302_read_device_id(FAR struct fusb302_dev_s * priv,
FAR uint8_t * arg)
{
int ret;
ret = fusb302_getreg(priv, FUSB302_DEV_ID_REG);
if (ret < 0)
{
fusb302_err("ERROR: Failed to read device ID\n");
return -EIO;
}
*arg = ret;
return OK;
}
/****************************************************************************
* Name: fusb302_clear_interrupts
*
* Description:
* Clear interrupts from FUSB302 chip
*
****************************************************************************/
static int fusb302_clear_interrupts(FAR struct fusb302_dev_s * priv)
{
int ret = OK;
ret = fusb302_getreg(priv, FUSB302_INTERRUPT_REG);
if (ret >= 0)
{
ret = fusb302_getreg(priv, FUSB302_INTERRUPTA_REG);
}
if (ret >= 0)
{
ret = fusb302_getreg(priv, FUSB302_INTERRUPTB_REG);
}
if (ret < 0)
{
fusb302_err("ERROR: Failed to clear interrupts\n");
return -EIO;
}
return ret;
}
/****************************************************************************
* Name: fusb302_setup
*
* Description:
* Setup FUSB302 chip
*
****************************************************************************/
static int fusb302_setup(FAR struct fusb302_dev_s *priv,
struct fusb302_setup_s *setup)
{
/* Not implemented yet */
return -ENOTTY;
}
/****************************************************************************
* Name: fusb302_set_mode
*
* Description:
* Configure supported device modes (sink, source, DRP, accessory)
*
****************************************************************************/
static int fusb302_set_mode(FAR struct fusb302_dev_s *priv,
enum fusb302_mode_e mode)
{
int ret;
int regval;
ret = OK;
priv->int_pending = false;
priv->config->irq_enable(priv->config, false);
/* Best to start with a known, clean, set of register settings.
* This sets:
* Host current to default
* Vbus measure off
* Switches0 to defaults (Vconn_CC off etc)
*/
if (priv->state != RESET)
{
fusb302_reset(priv);
}
regval = fusb302_clear_interrupts(priv);
switch (mode)
{
case MODE_DRP_POLL_AUTO:
{
/* set up FUSB302 to automatically poll for device or host */
ret = fusb302_putreg(priv, FUSB302_CONTROL2_REG,
(SET_POLL_MODE(DRP_POLLING) |
CONTROL2_TOGGLE |
SET_WAIT_MODE(WAIT_80MS))));
priv->state = WAITING_FOR_DRP_TOGG_I;
priv->connect_status = TOGGLING;
set_int_mask(priv);
}
break;
case MODE_SNK_POLL_AUTO:
{
/* set up FUSB302 to automatically poll for device */
ret = fusb302_putreg(priv, FUSB302_CONTROL2_REG,
(SET_POLL_MODE(SNK_POLLING) |
CONTROL2_TOGGLE));
priv->state = WAITING_FOR_SNK_TOGG_I;
priv->connect_status = TOGGLING;
set_int_mask(priv);
}
break;
case MODE_SRC_POLL_AUTO:
{
/* set up FUSB302 to automatically poll for device */
ret = fusb302_putreg(priv, FUSB302_CONTROL2_REG,
(SET_POLL_MODE(SRC_POLLING) |
CONTROL2_TOGGLE));
priv->state = WAITING_FOR_SRC_TOGG_I;
priv->connect_status = TOGGLING;
set_int_mask(priv);
}
break;
default:
return -EINVAL;
break;
}
ret = fusb302_putreg(priv, FUSB302_POWER_REG, POWER_MODE_TOGGLING);
/* enable interrupts */
regval = fusb302_getreg(priv, FUSB302_CONTROL0_REG);
regval &= ~CONTROL0_INT_MASK;
ret = fusb302_putreg(priv, FUSB302_CONTROL0_REG, regval);
if (ret == OK)
{
priv->config->irq_enable(priv->config, true);
}
else
{
priv->config->irq_enable(priv->config, false);
}
return ret;
}
/****************************************************************************
* Name: fusb302_read_status
*
* Description:
* Read status register
*
****************************************************************************/
static int fusb302_read_status(FAR struct fusb302_dev_s *priv,
FAR uint8_t *arg)
{
int ret;
ret = fusb302_getreg(priv, FUSB302_STATUS0_REG);
if (ret < 0)
{
fusb302_err("ERROR: Failed to read status\n");
return -EIO;
}
*arg = ret;
return OK;
}
/****************************************************************************
* Name: fusb302_reset
*
* Description:
* Reset FUSB302 HW and clear I2C registers
*
****************************************************************************/
static int fusb302_reset(FAR struct fusb302_dev_s *priv)
{
int ret = OK;
ret = fusb302_putreg(priv, FUSB302_RESET_REG, RESET_SW_RESET);
if (ret < 0)
{
fusb302_err("ERROR: FUSB302 did not respond to soft reset\n");
return -EFAULT;
}
else
{
fusb302_info("INFO: fusb302 soft reset executed\n");
}
priv->state = RESET;
priv->connect_status = NOTHING_CONNECTED;
return ret;
}
/****************************************************************************
* Name: fusb302_open
*
* Description:
* This function is called whenever the FUSB302 device is opened.
*
****************************************************************************/
static int fusb302_open(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct fusb302_dev_s *priv = inode->i_private;
int ret = OK;
/* Probe device */
ret = fusb302_getreg(priv, FUSB302_DEV_ID_REG);
if (ret < 0)
{
fusb302_err("ERROR: No response at given address 0x%02X\n",
priv->config->i2c_addr);
ret = -EFAULT;
}
/* Error exit */
return ret;
}
/****************************************************************************
* Name: fusb302_close
*
* Description:
* This routine is called when the FUSB302 device is closed.
*
****************************************************************************/
static int fusb302_close(FAR struct file *filep)
{
FAR struct inode *inode = filep->f_inode;
FAR struct fusb302_dev_s *priv = inode->i_private;
fusb302_dump_registers(priv, "Registers before close");
priv->config->irq_enable(priv->config, false);
return OK;
}
/****************************************************************************
* Name: fusb302_read
* Description:
* This routine is called when the FUSB302 device is read.
****************************************************************************/
static ssize_t fusb302_read(FAR struct file *filep,
FAR char *buffer,
size_t buflen)
{
FAR struct inode *inode = filep->f_inode;
FAR struct fusb302_dev_s *priv = inode->i_private;
FAR struct fusb302_result_s *ptr;
irqstate_t flags;
int ret;
if (buflen < sizeof(struct fusb302_result_s))
{
return 0;
}
ptr = (struct fusb302_result_s *)buffer;
ret = nxmutex_lock(&priv->devlock);
if (ret < 0)
{
return ret;
}
flags = enter_critical_section();
ptr->connected_state = priv->connect_status;
ptr->state = priv->state;
if (priv->int_pending)
{
fusb302_dump_registers(priv, "Registers after attach detected");
}
priv->int_pending = false;
leave_critical_section(flags);
nxmutex_unlock(&priv->devlock);
return sizeof(struct fusb302_result_s);
}
/****************************************************************************
* Name: fusb302_write
* Description:
* This routine is called when the FUSB302 device is written to.
****************************************************************************/
static ssize_t fusb302_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
ssize_t length = 0;
return length;
}
/****************************************************************************
* Name: fusb302_ioctl
* Description:
* This routine is called when ioctl function call is performed for
* the FUSB302 device.
****************************************************************************/
static int fusb302_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct fusb302_dev_s *priv = inode->i_private;
int ret;
ret = nxmutex_lock(&priv->devlock);
if (ret < 0)
{
return ret;
}
fusb302_info("cmd: 0x%02X, arg:%lu\n", cmd, arg);
switch (cmd)
{
case USBCIOC_READ_DEVID:
{
ret = fusb302_read_device_id(priv, (uint8_t *)arg);
}
break;
case USBCIOC_SETUP:
{
ret = fusb302_setup(priv, (struct fusb302_setup_s *)arg);
}
break;
case USBCIOC_SET_POLL_MODE:
{
ret = fusb302_set_mode(priv, (uint8_t)arg);
}
break;
case USBCIOC_READ_STATUS:
{
ret = fusb302_read_status(priv, (uint8_t *)arg);
}
break;
case USBCIOC_RESET:
{
fusb302_dump_registers(priv, "Before reset");
ret = fusb302_reset(priv);
fusb302_dump_registers(priv, "After reset");
}
break;
default:
{
fusb302_err("ERROR: Unrecognized cmd: %d\n", cmd);
ret = -ENOTTY;
}
break;
}
fusb302_dump_registers(priv, "After ioctl");
nxmutex_unlock(&priv->devlock);
return ret;
}
/****************************************************************************
* Name: fusb302_poll
* Description:
* This routine is called during FUSB302 device poll
****************************************************************************/
static int fusb302_poll(FAR struct file *filep,
FAR struct pollfd *fds,
bool setup)
{
FAR struct inode *inode;
FAR struct fusb302_dev_s *priv;
int ret = OK;
int i;
DEBUGASSERT(filep && fds);
inode = filep->f_inode;
DEBUGASSERT(inode && inode->i_private);
priv = (FAR struct fusb302_dev_s *)inode->i_private;
ret = nxmutex_lock(&priv->devlock);
if (ret < 0)
{
return ret;
}
if (setup)
{
/* Ignore waits that do not include POLLIN */
if ((fds->events & POLLIN) == 0)
{
ret = -EDEADLK;
goto out;
}
/* This is a request to set up the poll. Find an available
* slot for the poll structure reference.
*/
for (i = 0; i < CONFIG_FUSB302_NPOLLWAITERS; i++)
{
/* Find an available slot */
if (!priv->fds[i])
{
/* Bind the poll structure and this slot */
priv->fds[i] = fds;
fds->priv = &priv->fds[i];
break;
}
}
if (i >= CONFIG_FUSB302_NPOLLWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
goto out;
}
}
else if (fds->priv)
{
/* This is a request to tear down the poll. */
struct pollfd **slot = (struct pollfd **)fds->priv;
DEBUGASSERT(slot != NULL);
/* Remove all memory of the poll setup */
*slot = NULL;
fds->priv = NULL;
}
out:
nxmutex_unlock(&priv->devlock);
return ret;
}
/****************************************************************************
* Name: fusb302_callback
*
* Description:
* FUSB302 interrupt handler
*
****************************************************************************/
static int fusb302_int_handler(int irq, FAR void *context, FAR void *arg)
{
FAR struct fusb302_dev_s *priv = (FAR struct fusb302_dev_s *)arg;
FAR struct fusb302_config_s *config;
int ret;
ret = OK;
DEBUGASSERT(priv != NULL);
config = priv->config;
DEBUGASSERT(config != NULL);
priv->int_pending = true;
/* Disable interrupts */
config->irq_enable(config, false);
/* run worker scheduler */
ret = fusb302_schedule(priv);
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: fusb302_register
*
* Description:
* Register the FUSB302 character driver as "devpath"
*
* Input Parameters
* devpath - the full path to the driver to register, e.g. "/dev/fusb302"
*
* Returned Value
*
* Zero (OK) on success; a negated errno value on failure
*
****************************************************************************/
int fusb302_register(FAR const char *devpath,
FAR struct fusb302_config_s *config)
{
int ret;
DEBUGASSERT(devpath != NULL && config != NULL);
/* Initialize the FUSB302 device structure */
FAR struct fusb302_dev_s *priv;
priv = (FAR struct fusb302_dev_s *)
kmm_zalloc(sizeof(struct fusb302_dev_s));
if (!priv)
{
fusb302_err("ERROR: Failed to allocate instance\n");
return -ENOMEM;
}
/* Initialize device structure mutex */
nxmutex_init(&priv->devlock);
priv->int_pending = false;
priv->config = config;
/* probe the FUSB302 */
ret = fusb302_getreg(priv, FUSB302_DEV_ID_REG);
if (ret < 0)
{
fusb302_err("ERROR: FUSB302 did not respond\n");
return -ENODEV;
}
/* Register the character driver */
ret = register_driver(devpath, &g_fusb302ops, 0666, priv);
if (ret < 0)
{
fusb302_err("ERROR: Failed to register driver: %d\n", ret);
goto errout_with_priv;
}
/* Prepare interrupt line and handler */
if (priv->config->irq_clear)
{
priv->config->irq_clear(config);
}
priv->config->irq_attach(config, fusb302_int_handler, priv);
priv->config->irq_enable(config, false);
return OK;
errout_with_priv:
nxmutex_destroy(&priv->devlock);
kmm_free(priv);
return ret;
}
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