am335xgpio.c File Reference

Include dependency graph for am335xgpio.c:

Go to the source code of this file.

Macros
#define	AM335XGPIO_CLEAR_REG_BITS(chip_num, offset, bit_mask)    (*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)) &= ~(bit_mask))
#define	AM335XGPIO_GPIO0_HW_ADDR   0x44E07000
#define	AM335XGPIO_GPIO1_HW_ADDR   0x4804C000
#define	AM335XGPIO_GPIO2_HW_ADDR   0x481AC000
#define	AM335XGPIO_GPIO3_HW_ADDR   0x481AE000
#define	AM335XGPIO_GPIO_CLEARDATAOUT_OFFSET   (0x190 / 4)
#define	AM335XGPIO_GPIO_DATAIN_OFFSET   (0x138 / 4)
#define	AM335XGPIO_GPIO_DATAOUT_OFFSET   (0x13C / 4) /* DATAOUT register uses 0 for output, 1 for input */
#define	AM335XGPIO_GPIO_OE_OFFSET   (0x134 / 4)
#define	AM335XGPIO_GPIO_SETDATAOUT_OFFSET   (0x194 / 4)
#define	AM335XGPIO_NUM_GPIO_CHIPS   4
#define	AM335XGPIO_NUM_GPIO_PER_CHIP   32
#define	AM335XGPIO_READ_REG(chip_num, offset)    (*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)))
#define	AM335XGPIO_SET_HIGH(gpio_config)    AM335XGPIO_WRITE_REG((gpio_config)->chip_num, AM335XGPIO_GPIO_SETDATAOUT_OFFSET, BIT((gpio_config)->gpio_num))
#define	AM335XGPIO_SET_INPUT(gpio_config)    AM335XGPIO_SET_REG_BITS((gpio_config)->chip_num, AM335XGPIO_GPIO_OE_OFFSET, BIT((gpio_config)->gpio_num))
#define	AM335XGPIO_SET_LOW(gpio_config)    AM335XGPIO_WRITE_REG((gpio_config)->chip_num, AM335XGPIO_GPIO_CLEARDATAOUT_OFFSET, BIT((gpio_config)->gpio_num))
#define	AM335XGPIO_SET_OUTPUT(gpio_config)    AM335XGPIO_CLEAR_REG_BITS((gpio_config)->chip_num, AM335XGPIO_GPIO_OE_OFFSET, BIT((gpio_config)->gpio_num))
#define	AM335XGPIO_SET_REG_BITS(chip_num, offset, bit_mask)    (*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)) |= (bit_mask))
#define	AM335XGPIO_WRITE_REG(chip_num, offset, value)    (*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)) = (value))

Enumerations
enum	amx335gpio_initial_gpio_mode { AM335XGPIO_GPIO_MODE_INPUT , AM335XGPIO_GPIO_MODE_OUTPUT_LOW , AM335XGPIO_GPIO_MODE_OUTPUT_HIGH }

Functions
static int	am335xgpio_blink (bool on)
static int	am335xgpio_init (void)
static bool	am335xgpio_jtag_mode_possible (void)
static int	am335xgpio_khz (int khz, int *jtag_speed)
static void	am335xgpio_munmap (void)
static int	am335xgpio_quit (void)
static bb_value_t	am335xgpio_read (void)
static int	am335xgpio_reset (int trst, int srst)
static int	am335xgpio_speed (int speed)
static int	am335xgpio_speed_div (int speed, int *khz)
static bool	am335xgpio_swd_mode_possible (void)
static int	am335xgpio_swd_write (int swclk, int swdio)
static void	am335xgpio_swdio_drive (bool is_output)
static int	am335xgpio_swdio_read (void)
static int	am335xgpio_write (int tck, int tms, int tdi)
	COMMAND_HANDLER (am335xgpio_handle_speed_coeffs)
static enum amx335gpio_initial_gpio_mode	get_gpio_mode (const struct adapter_gpio_config *gpio_config)
static const char *	get_gpio_mode_name (enum amx335gpio_initial_gpio_mode gpio_mode)
static int	get_gpio_value (const struct adapter_gpio_config *gpio_config)
static void	initialize_gpio (enum adapter_gpio_config_index idx)
static bool	is_gpio_config_valid (const struct adapter_gpio_config *gpio_config)
static void	restore_gpio (enum adapter_gpio_config_index idx)
static void	set_gpio_value (const struct adapter_gpio_config *gpio_config, int value)

Variables
static const struct adapter_gpio_config *	adapter_gpio_config
struct adapter_driver	am335xgpio_adapter_driver
static struct bitbang_interface	am335xgpio_bitbang
static const struct command_registration	am335xgpio_command_handlers []
static const uint32_t	am335xgpio_gpio_chip_hw_addr [AM335XGPIO_NUM_GPIO_CHIPS]
static volatile uint32_t *	am335xgpio_gpio_chip_mmap_addr [AM335XGPIO_NUM_GPIO_CHIPS]
static struct jtag_interface	am335xgpio_interface
static const struct command_registration	am335xgpio_subcommand_handlers []
static const char *const	am335xgpio_transports [] = { "jtag", "swd", NULL }
static int	dev_mem_fd
static enum amx335gpio_initial_gpio_mode	initial_gpio_mode [ADAPTER_GPIO_IDX_NUM]
static unsigned int	jtag_delay
static int	speed_coeff = 600000
static int	speed_offset = 575

Macro Definition Documentation

AM335XGPIO_CLEAR_REG_BITS

#define AM335XGPIO_CLEAR_REG_BITS	(		chip_num,
			offset,
			bit_mask
	)		(*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)) &= ~(bit_mask))

Definition at line 49 of file am335xgpio.c.

AM335XGPIO_GPIO0_HW_ADDR

#define AM335XGPIO_GPIO0_HW_ADDR   0x44E07000

Definition at line 25 of file am335xgpio.c.

AM335XGPIO_GPIO1_HW_ADDR

#define AM335XGPIO_GPIO1_HW_ADDR   0x4804C000

Definition at line 26 of file am335xgpio.c.

AM335XGPIO_GPIO2_HW_ADDR

#define AM335XGPIO_GPIO2_HW_ADDR   0x481AC000

Definition at line 27 of file am335xgpio.c.

AM335XGPIO_GPIO3_HW_ADDR

#define AM335XGPIO_GPIO3_HW_ADDR   0x481AE000

Definition at line 28 of file am335xgpio.c.

AM335XGPIO_GPIO_CLEARDATAOUT_OFFSET

#define AM335XGPIO_GPIO_CLEARDATAOUT_OFFSET   (0x190 / 4)

Definition at line 37 of file am335xgpio.c.

AM335XGPIO_GPIO_DATAIN_OFFSET

#define AM335XGPIO_GPIO_DATAIN_OFFSET   (0x138 / 4)

Definition at line 35 of file am335xgpio.c.

AM335XGPIO_GPIO_DATAOUT_OFFSET

#define AM335XGPIO_GPIO_DATAOUT_OFFSET   (0x13C / 4) /* DATAOUT register uses 0 for output, 1 for input */

Definition at line 36 of file am335xgpio.c.

AM335XGPIO_GPIO_OE_OFFSET

#define AM335XGPIO_GPIO_OE_OFFSET   (0x134 / 4)

Definition at line 34 of file am335xgpio.c.

AM335XGPIO_GPIO_SETDATAOUT_OFFSET

#define AM335XGPIO_GPIO_SETDATAOUT_OFFSET   (0x194 / 4)

Definition at line 38 of file am335xgpio.c.

AM335XGPIO_NUM_GPIO_CHIPS

#define AM335XGPIO_NUM_GPIO_CHIPS   4

Definition at line 24 of file am335xgpio.c.

AM335XGPIO_NUM_GPIO_PER_CHIP

#define AM335XGPIO_NUM_GPIO_PER_CHIP   32

Definition at line 23 of file am335xgpio.c.

AM335XGPIO_READ_REG

#define AM335XGPIO_READ_REG	(		chip_num,
			offset
	)		(*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)))

Definition at line 40 of file am335xgpio.c.

AM335XGPIO_SET_HIGH

#define AM335XGPIO_SET_HIGH

(

gpio_config

)

AM335XGPIO_WRITE_REG((gpio_config)->chip_num, AM335XGPIO_GPIO_SETDATAOUT_OFFSET, BIT((gpio_config)->gpio_num))

Definition at line 56 of file am335xgpio.c.

AM335XGPIO_SET_INPUT

#define AM335XGPIO_SET_INPUT

(

gpio_config

)

AM335XGPIO_SET_REG_BITS((gpio_config)->chip_num, AM335XGPIO_GPIO_OE_OFFSET, BIT((gpio_config)->gpio_num))

Definition at line 52 of file am335xgpio.c.

AM335XGPIO_SET_LOW

#define AM335XGPIO_SET_LOW

(

gpio_config

)

AM335XGPIO_WRITE_REG((gpio_config)->chip_num, AM335XGPIO_GPIO_CLEARDATAOUT_OFFSET, BIT((gpio_config)->gpio_num))

Definition at line 58 of file am335xgpio.c.

AM335XGPIO_SET_OUTPUT

#define AM335XGPIO_SET_OUTPUT

(

gpio_config

)

AM335XGPIO_CLEAR_REG_BITS((gpio_config)->chip_num, AM335XGPIO_GPIO_OE_OFFSET, BIT((gpio_config)->gpio_num))

Definition at line 54 of file am335xgpio.c.

AM335XGPIO_SET_REG_BITS

#define AM335XGPIO_SET_REG_BITS	(		chip_num,
			offset,
			bit_mask
	)		(*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)) |= (bit_mask))

Definition at line 46 of file am335xgpio.c.

AM335XGPIO_WRITE_REG

#define AM335XGPIO_WRITE_REG	(		chip_num,
			offset,
			value
	)		(*(am335xgpio_gpio_chip_mmap_addr[(chip_num)] + (offset)) = (value))

Definition at line 43 of file am335xgpio.c.

Enumeration Type Documentation

amx335gpio_initial_gpio_mode

enum amx335gpio_initial_gpio_mode

Enumerator
AM335XGPIO_GPIO_MODE_INPUT
AM335XGPIO_GPIO_MODE_OUTPUT_LOW
AM335XGPIO_GPIO_MODE_OUTPUT_HIGH

Definition at line 61 of file am335xgpio.c.

Function Documentation

am335xgpio_blink()

static int am335xgpio_blink ( bool  on )

static

Definition at line 278 of file am335xgpio.c.

am335xgpio_init()

static int am335xgpio_init ( void  )

static

Definition at line 389 of file am335xgpio.c.

References adapter_gpio_get_config(), ADAPTER_GPIO_IDX_LED, ADAPTER_GPIO_IDX_SRST, ADAPTER_GPIO_IDX_SWCLK, ADAPTER_GPIO_IDX_SWDIO, ADAPTER_GPIO_IDX_SWDIO_DIR, ADAPTER_GPIO_IDX_TCK, ADAPTER_GPIO_IDX_TDI, ADAPTER_GPIO_IDX_TDO, ADAPTER_GPIO_IDX_TMS, ADAPTER_GPIO_IDX_TRST, ADAPTER_GPIO_INIT_STATE_INPUT, am335xgpio_bitbang, am335xgpio_gpio_chip_hw_addr, am335xgpio_gpio_chip_mmap_addr, am335xgpio_jtag_mode_possible(), am335xgpio_munmap(), AM335XGPIO_NUM_GPIO_CHIPS, am335xgpio_swd_mode_possible(), dev_mem_fd, ERROR_JTAG_INIT_FAILED, ERROR_OK, initialize_gpio(), LOG_DEBUG, LOG_ERROR, LOG_INFO, NULL, transport_is_jtag(), and transport_is_swd().

am335xgpio_jtag_mode_possible()

static bool am335xgpio_jtag_mode_possible ( void  )

static

Definition at line 360 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_TCK, ADAPTER_GPIO_IDX_TDI, ADAPTER_GPIO_IDX_TDO, ADAPTER_GPIO_IDX_TMS, and is_gpio_config_valid().

Referenced by am335xgpio_init().

am335xgpio_khz()

static int am335xgpio_khz ( int  khz, int *  jtag_speed  )

static

Definition at line 295 of file am335xgpio.c.

References ERROR_FAIL, ERROR_OK, LOG_DEBUG, speed_coeff, and speed_offset.

am335xgpio_munmap()

static void am335xgpio_munmap ( void  )

static

Definition at line 382 of file am335xgpio.c.

References am335xgpio_gpio_chip_mmap_addr, AM335XGPIO_NUM_GPIO_CHIPS, and LOG_ERROR.

Referenced by am335xgpio_init().

am335xgpio_quit()

static int am335xgpio_quit ( void  )

static

Definition at line 464 of file am335xgpio.c.

am335xgpio_read()

static bb_value_t am335xgpio_read ( void  )

static

Definition at line 209 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_TDO, BB_HIGH, BB_LOW, and get_gpio_value().

am335xgpio_reset()

static int am335xgpio_reset ( int  trst, int  srst  )

static

Definition at line 238 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_SRST, ADAPTER_GPIO_IDX_TRST, adapter_gpio_config::chip_num, ERROR_OK, adapter_gpio_config::gpio_num, is_gpio_config_valid(), LOG_DEBUG, and set_gpio_value().

am335xgpio_speed()

static int am335xgpio_speed ( int  speed )

static

Definition at line 313 of file am335xgpio.c.

References ERROR_OK, and jtag_delay.

am335xgpio_speed_div()

static int am335xgpio_speed_div ( int  speed, int *  khz  )

static

Definition at line 307 of file am335xgpio.c.

References ERROR_OK, speed_coeff, and speed_offset.

am335xgpio_swd_mode_possible()

static bool am335xgpio_swd_mode_possible ( void  )

static

Definition at line 373 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_SWCLK, ADAPTER_GPIO_IDX_SWDIO, and is_gpio_config_valid().

Referenced by am335xgpio_init().

am335xgpio_swd_write()

static int am335xgpio_swd_write ( int  swclk, int  swdio  )

static

Definition at line 226 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_SWCLK, ADAPTER_GPIO_IDX_SWDIO, ERROR_OK, jtag_delay, and set_gpio_value().

am335xgpio_swdio_drive()

static void am335xgpio_swdio_drive ( bool  is_output )

static

Definition at line 260 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_SWDIO, ADAPTER_GPIO_IDX_SWDIO_DIR, AM335XGPIO_SET_INPUT, AM335XGPIO_SET_OUTPUT, is_gpio_config_valid(), and set_gpio_value().

am335xgpio_swdio_read()

static int am335xgpio_swdio_read ( void  )

static

Definition at line 273 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_SWDIO, and get_gpio_value().

am335xgpio_write()

static int am335xgpio_write ( int  tck, int  tms, int  tdi  )

static

Definition at line 214 of file am335xgpio.c.

References ADAPTER_GPIO_IDX_TCK, ADAPTER_GPIO_IDX_TDI, ADAPTER_GPIO_IDX_TMS, ERROR_OK, jtag_delay, and set_gpio_value().

COMMAND_HANDLER()

COMMAND_HANDLER

(

am335xgpio_handle_speed_coeffs

)

Definition at line 319 of file am335xgpio.c.

get_gpio_mode()

static enum amx335gpio_initial_gpio_mode get_gpio_mode ( const struct adapter_gpio_config *  gpio_config )

static

Definition at line 101 of file am335xgpio.c.

References adapter_gpio_config::active_low, ADAPTER_GPIO_DRIVE_MODE_OPEN_DRAIN, ADAPTER_GPIO_DRIVE_MODE_OPEN_SOURCE, ADAPTER_GPIO_DRIVE_MODE_PUSH_PULL, AM335XGPIO_SET_HIGH, AM335XGPIO_SET_INPUT, AM335XGPIO_SET_LOW, AM335XGPIO_SET_OUTPUT, and adapter_gpio_config::drive.

Referenced by initialize_gpio().

get_gpio_mode_name()

static const char* get_gpio_mode_name ( enum amx335gpio_initial_gpio_mode  gpio_mode )

static

Definition at line 144 of file am335xgpio.c.

References AM335XGPIO_GPIO_MODE_INPUT, AM335XGPIO_GPIO_MODE_OUTPUT_HIGH, and AM335XGPIO_GPIO_MODE_OUTPUT_LOW.

Referenced by initialize_gpio().

get_gpio_value()

static int get_gpio_value ( const struct adapter_gpio_config *  gpio_config )

static

Definition at line 93 of file am335xgpio.c.

References adapter_gpio_config::active_low, AM335XGPIO_GPIO_DATAIN_OFFSET, AM335XGPIO_READ_REG, adapter_gpio_config::chip_num, and adapter_gpio_config::gpio_num.

Referenced by am335xgpio_read(), and am335xgpio_swdio_read().

initialize_gpio()

static void initialize_gpio ( enum adapter_gpio_config_index  idx )

static

Definition at line 157 of file am335xgpio.c.

References ADAPTER_GPIO_DRIVE_MODE_PUSH_PULL, adapter_gpio_get_name(), ADAPTER_GPIO_INIT_STATE_ACTIVE, ADAPTER_GPIO_INIT_STATE_INACTIVE, ADAPTER_GPIO_INIT_STATE_INPUT, ADAPTER_GPIO_PULL_NONE, AM335XGPIO_SET_INPUT, AM335XGPIO_SET_OUTPUT, adapter_gpio_config::chip_num, adapter_gpio_config::drive, get_gpio_mode(), get_gpio_mode_name(), adapter_gpio_config::gpio_num, adapter_gpio_config::init_state, initial_gpio_mode, is_gpio_config_valid(), LOG_DEBUG, LOG_WARNING, adapter_gpio_config::pull, and set_gpio_value().

Referenced by am335xgpio_init().

is_gpio_config_valid()

static bool is_gpio_config_valid ( const struct adapter_gpio_config *  gpio_config )

static

Definition at line 87 of file am335xgpio.c.

References AM335XGPIO_NUM_GPIO_CHIPS, AM335XGPIO_NUM_GPIO_PER_CHIP, adapter_gpio_config::chip_num, and adapter_gpio_config::gpio_num.

Referenced by am335xgpio_jtag_mode_possible(), am335xgpio_reset(), am335xgpio_swd_mode_possible(), am335xgpio_swdio_drive(), initialize_gpio(), and restore_gpio().

restore_gpio()

static void restore_gpio ( enum adapter_gpio_config_index  idx )

static

Definition at line 190 of file am335xgpio.c.

References AM335XGPIO_GPIO_MODE_INPUT, AM335XGPIO_GPIO_MODE_OUTPUT_HIGH, AM335XGPIO_GPIO_MODE_OUTPUT_LOW, AM335XGPIO_SET_HIGH, AM335XGPIO_SET_INPUT, AM335XGPIO_SET_LOW, AM335XGPIO_SET_OUTPUT, initial_gpio_mode, and is_gpio_config_valid().

set_gpio_value()

static void set_gpio_value ( const struct adapter_gpio_config *  gpio_config, int  value  )

static

Definition at line 101 of file am335xgpio.c.

Referenced by am335xgpio_reset(), am335xgpio_swd_write(), am335xgpio_swdio_drive(), am335xgpio_write(), and initialize_gpio().

Variable Documentation

adapter_gpio_config

const struct adapter_gpio_config* adapter_gpio_config

static

Definition at line 85 of file am335xgpio.c.

am335xgpio_adapter_driver

struct adapter_driver am335xgpio_adapter_driver

Initial value:

= {
    .name = "am335xgpio",
    .transports = am335xgpio_transports,
    .commands = am335xgpio_command_handlers,
 
    .init = am335xgpio_init,
    .quit = am335xgpio_quit,
    .reset = am335xgpio_reset,
    .speed = am335xgpio_speed,
    .khz = am335xgpio_khz,
    .speed_div = am335xgpio_speed_div,
 
    .jtag_ops = &am335xgpio_interface,
    .swd_ops = &bitbang_swd,
}

Definition at line 464 of file am335xgpio.c.

am335xgpio_bitbang

struct bitbang_interface am335xgpio_bitbang

static

Initial value:

= {
    .read = am335xgpio_read,
    .write = am335xgpio_write,
    .swdio_read = am335xgpio_swdio_read,
    .swdio_drive = am335xgpio_swdio_drive,
    .swd_write = am335xgpio_swd_write,
    .blink = am335xgpio_blink
}

Definition at line 278 of file am335xgpio.c.

Referenced by am335xgpio_init().

am335xgpio_command_handlers

const struct command_registration am335xgpio_command_handlers[]

static

Initial value:

= {
    {
        .name = "am335xgpio",
        .mode = COMMAND_ANY,
        .help = "perform am335xgpio management",
        .chain = am335xgpio_subcommand_handlers,
        .usage = "",
    },
    COMMAND_REGISTRATION_DONE
}

Definition at line 319 of file am335xgpio.c.

am335xgpio_gpio_chip_hw_addr

const uint32_t am335xgpio_gpio_chip_hw_addr[AM335XGPIO_NUM_GPIO_CHIPS]

static

Initial value:

= {
    AM335XGPIO_GPIO0_HW_ADDR,
    AM335XGPIO_GPIO1_HW_ADDR,
    AM335XGPIO_GPIO2_HW_ADDR,
    AM335XGPIO_GPIO3_HW_ADDR,
}

Definition at line 67 of file am335xgpio.c.

Referenced by am335xgpio_init().

am335xgpio_gpio_chip_mmap_addr

volatile uint32_t* am335xgpio_gpio_chip_mmap_addr[AM335XGPIO_NUM_GPIO_CHIPS]

static

Definition at line 75 of file am335xgpio.c.

Referenced by am335xgpio_init(), and am335xgpio_munmap().

am335xgpio_interface

struct jtag_interface am335xgpio_interface

static

Initial value:

= {
    .supported = DEBUG_CAP_TMS_SEQ,
    .execute_queue = bitbang_execute_queue,
}

Definition at line 353 of file am335xgpio.c.

am335xgpio_subcommand_handlers

const struct command_registration am335xgpio_subcommand_handlers[]

static

Initial value:

= {
    {
        .name = "speed_coeffs",
        .handler = am335xgpio_handle_speed_coeffs,
        .mode = COMMAND_CONFIG,
        .help = "SPEED_COEFF and SPEED_OFFSET for delay calculations.",
        .usage = "[SPEED_COEFF SPEED_OFFSET]",
    },
    COMMAND_REGISTRATION_DONE
}

Definition at line 319 of file am335xgpio.c.

am335xgpio_transports

const char* const am335xgpio_transports[] = { "jtag", "swd", NULL }

static

Definition at line 353 of file am335xgpio.c.

dev_mem_fd

int dev_mem_fd

static

Definition at line 77 of file am335xgpio.c.

Referenced by am335xgpio_init().

initial_gpio_mode

enum amx335gpio_initial_gpio_mode initial_gpio_mode[ADAPTER_GPIO_IDX_NUM]

static

Definition at line 77 of file am335xgpio.c.

Referenced by initialize_gpio(), and restore_gpio().

jtag_delay

unsigned int jtag_delay

static

Definition at line 83 of file am335xgpio.c.

Referenced by am335xgpio_speed(), am335xgpio_swd_write(), and am335xgpio_write().

speed_coeff

int speed_coeff = 600000

static

Definition at line 81 of file am335xgpio.c.

Referenced by am335xgpio_khz(), and am335xgpio_speed_div().

speed_offset

int speed_offset = 575

static

Definition at line 82 of file am335xgpio.c.

Referenced by am335xgpio_khz(), and am335xgpio_speed_div().