Include dependency graph for bcm2835gpio.c:

Data Structures
struct	initial_gpio_state

Macros
#define	BCM2835_GPIO_BASE (bcm2835_peri_base + 0x200000) /* GPIO controller */

#define	BCM2835_GPIO_MODE_INPUT 0

#define	BCM2835_GPIO_MODE_OUTPUT 1

#define	BCM2835_PADS_GPIO_0_27 (bcm2835_peri_base + 0x100000)

#define	BCM2835_PADS_GPIO_0_27_OFFSET (0x2c / 4)

#define	GPIO_CLR ((pio_base+10)) / clears bits which are 1, ignores bits which are 0 */

#define	GPIO_LEV ((pio_base+13)) / current level of the pin */

#define	GPIO_SET ((pio_base+7)) / sets bits which are 1, ignores bits which are 0 */

#define	INP_GPIO(g) do { (pio_base+((g)/10)) &= ~(7<<(((g)%10)3)); } while (0)

#define	MODE_GPIO(g) ((pio_base+((g)/10))>>(((g)%10)3) & 7)

#define	OUT_GPIO(g) SET_MODE_GPIO(g, BCM2835_GPIO_MODE_OUTPUT)

#define	SET_MODE_GPIO(g, m)

Functions
static void	bcm2835_gpio_synchronize (void)

static void	bcm2835_swdio_drive (bool is_output)

static int	bcm2835_swdio_read (void)

static int	bcm2835gpio_blink (int on)

static int	bcm2835gpio_init (void)

static bool	bcm2835gpio_jtag_mode_possible (void)

static int	bcm2835gpio_khz (int khz, int *jtag_speed)

static void	bcm2835gpio_munmap (void)

static int	bcm2835gpio_quit (void)

static bb_value_t	bcm2835gpio_read (void)

static int	bcm2835gpio_reset (int trst, int srst)

static int	bcm2835gpio_speed (int speed)

static int	bcm2835gpio_speed_div (int speed, int *khz)

static bool	bcm2835gpio_swd_mode_possible (void)

static int	bcm2835gpio_swd_write_fast (int swclk, int swdio)

static int	bcm2835gpio_swd_write_generic (int swclk, int swdio)

static int	bcm2835gpio_write (int tck, int tms, int tdi)

	COMMAND_HANDLER (bcm2835gpio_handle_peripheral_base)

	COMMAND_HANDLER (bcm2835gpio_handle_speed_coeffs)

static void	initialize_gpio (enum adapter_gpio_config_index idx)

static bool	is_gpio_config_valid (enum adapter_gpio_config_index idx)

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

uint32_t	bcm2835_peri_base = 0x20000000

static const char *const	bcm2835_transports [] = { "jtag", "swd", NULL }

struct adapter_driver	bcm2835gpio_adapter_driver

static struct bitbang_interface	bcm2835gpio_bitbang

static const struct command_registration	bcm2835gpio_command_handlers []

static struct jtag_interface	bcm2835gpio_interface

static const struct command_registration	bcm2835gpio_subcommand_handlers []

static int	dev_mem_fd

static uint32_t	initial_drive_strength_etc

static struct initial_gpio_state	initial_gpio_state [ADAPTER_GPIO_IDX_NUM]

static unsigned int	jtag_delay

static volatile uint32_t *	pads_base = MAP_FAILED

static volatile uint32_t *	pio_base = MAP_FAILED

static int	speed_coeff = 113714

static int	speed_offset = 28

Macro Definition Documentation

◆ BCM2835_GPIO_BASE

#define BCM2835_GPIO_BASE (bcm2835_peri_base + 0x200000) /* GPIO controller */

Definition at line 23 of file bcm2835gpio.c.

◆ BCM2835_GPIO_MODE_INPUT

#define BCM2835_GPIO_MODE_INPUT 0

Definition at line 29 of file bcm2835gpio.c.

◆ BCM2835_GPIO_MODE_OUTPUT

#define BCM2835_GPIO_MODE_OUTPUT 1

Definition at line 30 of file bcm2835gpio.c.

◆ BCM2835_PADS_GPIO_0_27

#define BCM2835_PADS_GPIO_0_27 (bcm2835_peri_base + 0x100000)

Definition at line 25 of file bcm2835gpio.c.

◆ BCM2835_PADS_GPIO_0_27_OFFSET

#define BCM2835_PADS_GPIO_0_27_OFFSET (0x2c / 4)

Definition at line 26 of file bcm2835gpio.c.

◆ GPIO_CLR

#define GPIO_CLR (*(pio_base+10)) /* clears bits which are 1, ignores bits which are 0 */

Definition at line 41 of file bcm2835gpio.c.

◆ GPIO_LEV

#define GPIO_LEV (*(pio_base+13)) /* current level of the pin */

Definition at line 42 of file bcm2835gpio.c.

◆ GPIO_SET

#define GPIO_SET (*(pio_base+7)) /* sets bits which are 1, ignores bits which are 0 */

Definition at line 40 of file bcm2835gpio.c.

◆ INP_GPIO

#define INP_GPIO ( g ) do { *(pio_base+((g)/10)) &= ~(7<<(((g)%10)*3)); } while (0)

Definition at line 34 of file bcm2835gpio.c.

◆ MODE_GPIO

#define MODE_GPIO ( g ) (*(pio_base+((g)/10))>>(((g)%10)*3) & 7)

Definition at line 33 of file bcm2835gpio.c.

◆ OUT_GPIO

#define OUT_GPIO ( g ) SET_MODE_GPIO(g, BCM2835_GPIO_MODE_OUTPUT)

Definition at line 38 of file bcm2835gpio.c.

◆ SET_MODE_GPIO

#define SET_MODE_GPIO	(	g,
		m
	)

Value:

        do { /* clear the mode bits first, then set as necessary */ \
        INP_GPIO(g);                        \
        *(pio_base+((g)/10)) |=  ((m)<<(((g)%10)*3)); } while (0)

Definition at line 35 of file bcm2835gpio.c.

Function Documentation

◆ bcm2835_gpio_synchronize()

static void bcm2835_gpio_synchronize ( void )

inlinestatic

Definition at line 60 of file bcm2835gpio.c.

Referenced by bcm2835_swdio_drive(), bcm2835gpio_swd_write_fast(), bcm2835gpio_write(), initialize_gpio(), restore_gpio(), and set_gpio_value().

◆ bcm2835_swdio_drive()

static void bcm2835_swdio_drive ( bool is_output )

static

Definition at line 240 of file bcm2835gpio.c.

References ADAPTER_GPIO_IDX_SWDIO, ADAPTER_GPIO_IDX_SWDIO_DIR, bcm2835_gpio_synchronize(), INP_GPIO, is_gpio_config_valid(), OUT_GPIO, and set_gpio_value().

◆ bcm2835_swdio_read()

static int bcm2835_swdio_read ( void )

static

Definition at line 254 of file bcm2835gpio.c.

References adapter_gpio_config::active_low, ADAPTER_GPIO_IDX_SWDIO, GPIO_LEV, and adapter_gpio_config::gpio_num.

◆ bcm2835gpio_blink()

static int bcm2835gpio_blink ( int on )

static

Definition at line 372 of file bcm2835gpio.c.

◆ bcm2835gpio_init()

static int bcm2835gpio_init ( void )

static

Definition at line 389 of file bcm2835gpio.c.

References ADAPTER_GPIO_DRIVE_MODE_PUSH_PULL, 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, BCM2835_GPIO_BASE, BCM2835_PADS_GPIO_0_27, BCM2835_PADS_GPIO_0_27_OFFSET, bcm2835gpio_bitbang, bcm2835gpio_jtag_mode_possible(), bcm2835gpio_munmap(), bcm2835gpio_swd_mode_possible(), bcm2835gpio_swd_write_fast(), bcm2835gpio_swd_write_generic(), dev_mem_fd, ERROR_JTAG_INIT_FAILED, ERROR_OK, initial_drive_strength_etc, initialize_gpio(), LOG_DEBUG, LOG_ERROR, LOG_INFO, NULL, pads_base, pio_base, bitbang_interface::swd_write, transport_is_jtag(), and transport_is_swd().

◆ bcm2835gpio_jtag_mode_possible()

static bool bcm2835gpio_jtag_mode_possible ( void )

static

Definition at line 337 of file bcm2835gpio.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 bcm2835gpio_init().

◆ bcm2835gpio_khz()

static int bcm2835gpio_khz	(	int	khz,
		int *	jtag_speed
	)

static

Definition at line 261 of file bcm2835gpio.c.

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

◆ bcm2835gpio_munmap()

static void bcm2835gpio_munmap ( void )

static

Definition at line 359 of file bcm2835gpio.c.

References pads_base, and pio_base.

Referenced by bcm2835gpio_init(), and bcm2835gpio_quit().

◆ bcm2835gpio_quit()

static int bcm2835gpio_quit ( void )

static

◆ bcm2835gpio_read()

static bb_value_t bcm2835gpio_read ( void )

static

Definition at line 160 of file bcm2835gpio.c.

References adapter_gpio_config::active_low, ADAPTER_GPIO_IDX_TDO, BB_HIGH, BB_LOW, GPIO_LEV, and adapter_gpio_config::gpio_num.

◆ bcm2835gpio_reset()

static int bcm2835gpio_reset	(	int	trst,
		int	srst
	)

static

Definition at line 221 of file bcm2835gpio.c.

References ADAPTER_GPIO_IDX_SRST, ADAPTER_GPIO_IDX_TRST, ERROR_OK, is_gpio_config_valid(), LOG_DEBUG, and set_gpio_value().

◆ bcm2835gpio_speed()

static int bcm2835gpio_speed ( int speed )

static

Definition at line 279 of file bcm2835gpio.c.

References ERROR_OK, and jtag_delay.

◆ bcm2835gpio_speed_div()

static int bcm2835gpio_speed_div	(	int	speed,
		int *	khz
	)

static

Definition at line 273 of file bcm2835gpio.c.

References ERROR_OK, speed_coeff, and speed_offset.

◆ bcm2835gpio_swd_mode_possible()

static bool bcm2835gpio_swd_mode_possible ( void )

static

Definition at line 350 of file bcm2835gpio.c.

References ADAPTER_GPIO_IDX_SWCLK, ADAPTER_GPIO_IDX_SWDIO, and is_gpio_config_valid().

Referenced by bcm2835gpio_init().

◆ bcm2835gpio_swd_write_fast()

static int bcm2835gpio_swd_write_fast	(	int	swclk,
		int	swdio
	)

static

Definition at line 188 of file bcm2835gpio.c.

References adapter_gpio_config::active_low, ADAPTER_GPIO_IDX_SWCLK, ADAPTER_GPIO_IDX_SWDIO, bcm2835_gpio_synchronize(), ERROR_OK, GPIO_CLR, adapter_gpio_config::gpio_num, GPIO_SET, and jtag_delay.

Referenced by bcm2835gpio_init().

◆ bcm2835gpio_swd_write_generic()

static int bcm2835gpio_swd_write_generic	(	int	swclk,
		int	swdio
	)

static

Definition at line 209 of file bcm2835gpio.c.

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

Referenced by bcm2835gpio_init().

◆ bcm2835gpio_write()

static int bcm2835gpio_write	(	int	tck,
		int	tms,
		int	tdi
	)

static

Definition at line 168 of file bcm2835gpio.c.

References ADAPTER_GPIO_IDX_TCK, ADAPTER_GPIO_IDX_TDI, ADAPTER_GPIO_IDX_TMS, bcm2835_gpio_synchronize(), ERROR_OK, GPIO_CLR, adapter_gpio_config::gpio_num, GPIO_SET, and jtag_delay.

◆ COMMAND_HANDLER() [1/2]

COMMAND_HANDLER ( bcm2835gpio_handle_peripheral_base )

Definition at line 297 of file bcm2835gpio.c.

◆ COMMAND_HANDLER() [2/2]

COMMAND_HANDLER ( bcm2835gpio_handle_speed_coeffs )

Definition at line 285 of file bcm2835gpio.c.

References CMD, CMD_ARGC, CMD_ARGV, COMMAND_PARSE_NUMBER, command_print(), ERROR_OK, speed_coeff, and speed_offset.

◆ initialize_gpio()

static void initialize_gpio ( enum adapter_gpio_config_index idx )

static

◆ is_gpio_config_valid()

static bool is_gpio_config_valid ( enum adapter_gpio_config_index idx )

static

Definition at line 69 of file bcm2835gpio.c.

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

Referenced by bcm2835_swdio_drive(), bcm2835gpio_jtag_mode_possible(), bcm2835gpio_reset(), bcm2835gpio_swd_mode_possible(), initialize_gpio(), and restore_gpio().

◆ restore_gpio()

static void restore_gpio ( enum adapter_gpio_config_index idx )

static

Definition at line 111 of file bcm2835gpio.c.

References BCM2835_GPIO_MODE_OUTPUT, bcm2835_gpio_synchronize(), GPIO_CLR, adapter_gpio_config::gpio_num, GPIO_SET, is_gpio_config_valid(), mode, and SET_MODE_GPIO.

Referenced by bcm2835gpio_quit().

◆ set_gpio_value()

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

static

Definition at line 78 of file bcm2835gpio.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, bcm2835_gpio_synchronize(), adapter_gpio_config::drive, GPIO_CLR, adapter_gpio_config::gpio_num, GPIO_SET, INP_GPIO, and OUT_GPIO.

Referenced by bcm2835_swdio_drive(), bcm2835gpio_reset(), bcm2835gpio_swd_write_generic(), and initialize_gpio().

Variable Documentation

◆ adapter_gpio_config

const struct adapter_gpio_config* adapter_gpio_config

static

Definition at line 53 of file bcm2835gpio.c.

◆ bcm2835_peri_base

uint32_t bcm2835_peri_base = 0x20000000

Definition at line 22 of file bcm2835gpio.c.

◆ bcm2835_transports

const char* const bcm2835_transports[] = { "jtag", "swd", NULL }

static

Definition at line 518 of file bcm2835gpio.c.

◆ bcm2835gpio_adapter_driver

struct adapter_driver bcm2835gpio_adapter_driver

Initial value:

= {
    .name = "bcm2835gpio",
    .transports = bcm2835_transports,
    .commands = bcm2835gpio_command_handlers,
 
    .init = bcm2835gpio_init,
    .quit = bcm2835gpio_quit,
    .reset = bcm2835gpio_reset,
    .speed = bcm2835gpio_speed,
    .khz = bcm2835gpio_khz,
    .speed_div = bcm2835gpio_speed_div,
 
    .jtag_ops = &bcm2835gpio_interface,
    .swd_ops = &bitbang_swd,
}

Definition at line 518 of file bcm2835gpio.c.

◆ bcm2835gpio_bitbang

struct bitbang_interface bcm2835gpio_bitbang

static

Initial value:

= {
    .read = bcm2835gpio_read,
    .write = bcm2835gpio_write,
    .swdio_read = bcm2835_swdio_read,
    .swdio_drive = bcm2835_swdio_drive,
    .swd_write = bcm2835gpio_swd_write_generic,
    .blink = bcm2835gpio_blink,
}

Definition at line 372 of file bcm2835gpio.c.

Referenced by bcm2835gpio_init().

◆ bcm2835gpio_command_handlers

const struct command_registration bcm2835gpio_command_handlers[]

static

Initial value:

= {
    {
        .name = "bcm2835gpio",
        .mode = COMMAND_ANY,
        .help = "perform bcm2835gpio management",
        .chain = bcm2835gpio_subcommand_handlers,
        .usage = "",
    },
    COMMAND_REGISTRATION_DONE
}

Definition at line 297 of file bcm2835gpio.c.

◆ bcm2835gpio_interface

struct jtag_interface bcm2835gpio_interface

static

Initial value:

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

Definition at line 518 of file bcm2835gpio.c.

◆ bcm2835gpio_subcommand_handlers

const struct command_registration bcm2835gpio_subcommand_handlers[]

static

Initial value:

= {
    {
        .name = "speed_coeffs",
        .handler = &bcm2835gpio_handle_speed_coeffs,
        .mode = COMMAND_CONFIG,
        .help = "SPEED_COEFF and SPEED_OFFSET for delay calculations.",
        .usage = "[SPEED_COEFF SPEED_OFFSET]",
    },
    {
        .name = "peripheral_base",
        .handler = &bcm2835gpio_handle_peripheral_base,
        .mode = COMMAND_CONFIG,
        .help = "peripheral base to access GPIOs (RPi1 0x20000000, RPi2 0x3F000000).",
        .usage = "[base]",
    },
 
    COMMAND_REGISTRATION_DONE
}

Definition at line 297 of file bcm2835gpio.c.

◆ dev_mem_fd

int dev_mem_fd

static

Definition at line 44 of file bcm2835gpio.c.

Referenced by bcm2835gpio_init().

◆ initial_drive_strength_etc

uint32_t initial_drive_strength_etc

static

Definition at line 58 of file bcm2835gpio.c.

Referenced by bcm2835gpio_init(), and bcm2835gpio_quit().

◆ initial_gpio_state

struct initial_gpio_state initial_gpio_state[ADAPTER_GPIO_IDX_NUM]

static

◆ jtag_delay

unsigned int jtag_delay

static

Definition at line 51 of file bcm2835gpio.c.

Referenced by bcm2835gpio_speed(), bcm2835gpio_swd_write_fast(), bcm2835gpio_swd_write_generic(), and bcm2835gpio_write().

◆ pads_base

volatile uint32_t* pads_base = MAP_FAILED

static

Definition at line 46 of file bcm2835gpio.c.

Referenced by bcm2835gpio_init(), bcm2835gpio_munmap(), and bcm2835gpio_quit().

◆ pio_base

volatile uint32_t* pio_base = MAP_FAILED

static

Definition at line 45 of file bcm2835gpio.c.

Referenced by bcm2835gpio_init(), and bcm2835gpio_munmap().

◆ speed_coeff

int speed_coeff = 113714

static

Definition at line 49 of file bcm2835gpio.c.

Referenced by bcm2835gpio_khz(), bcm2835gpio_speed_div(), and COMMAND_HANDLER().

◆ speed_offset

int speed_offset = 28

static

Definition at line 50 of file bcm2835gpio.c.

Referenced by bcm2835gpio_khz(), bcm2835gpio_speed_div(), and COMMAND_HANDLER().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ BCM2835_GPIO_BASE

◆ BCM2835_GPIO_MODE_INPUT

◆ BCM2835_GPIO_MODE_OUTPUT

◆ BCM2835_PADS_GPIO_0_27

◆ BCM2835_PADS_GPIO_0_27_OFFSET

◆ GPIO_CLR

◆ GPIO_LEV

◆ GPIO_SET

◆ INP_GPIO

◆ MODE_GPIO

◆ OUT_GPIO

◆ SET_MODE_GPIO

Function Documentation

◆ bcm2835_gpio_synchronize()

◆ bcm2835_swdio_drive()

◆ bcm2835_swdio_read()

◆ bcm2835gpio_blink()

◆ bcm2835gpio_init()

◆ bcm2835gpio_jtag_mode_possible()

◆ bcm2835gpio_khz()

◆ bcm2835gpio_munmap()

◆ bcm2835gpio_quit()

◆ bcm2835gpio_read()

◆ bcm2835gpio_reset()

◆ bcm2835gpio_speed()

◆ bcm2835gpio_speed_div()

◆ bcm2835gpio_swd_mode_possible()

◆ bcm2835gpio_swd_write_fast()

◆ bcm2835gpio_swd_write_generic()

◆ bcm2835gpio_write()

◆ COMMAND_HANDLER() [1/2]

◆ COMMAND_HANDLER() [2/2]

◆ initialize_gpio()

◆ is_gpio_config_valid()

◆ restore_gpio()

◆ set_gpio_value()

Variable Documentation

◆ adapter_gpio_config

◆ bcm2835_peri_base

◆ bcm2835_transports

◆ bcm2835gpio_adapter_driver

◆ bcm2835gpio_bitbang

◆ bcm2835gpio_command_handlers

◆ bcm2835gpio_interface

◆ bcm2835gpio_subcommand_handlers

◆ dev_mem_fd

◆ initial_drive_strength_etc

◆ initial_gpio_state

◆ jtag_delay

◆ pads_base

◆ pio_base

◆ speed_coeff

◆ speed_offset