ec_lpc.c File Reference

#include <arch/io.h>
#include <assert.h>
#include <console/console.h>
#include <delay.h>
#include <device/pnp.h>
#include <ec/google/common/mec.h>
#include <stdint.h>
#include <timer.h>
#include "chip.h"
#include "ec.h"
#include "ec_commands.h"

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Functions
static void	read_bytes (u16 port, unsigned int length, u8 *dest, u8 *csum)
static u8	read_byte (u16 port)
static void	write_bytes (u16 port, unsigned int length, u8 *msg, u8 *csum)
static u8	write_byte (u8 val, u16 port)
static int	google_chromeec_status_check (u16 port, u8 mask, u8 cond)
static int	google_chromeec_wait_ready (u16 port)
static int	google_chromeec_command_version (void)
static int	google_chromeec_command_v3 (struct chromeec_command *cec_command)
static int	google_chromeec_command_v1 (struct chromeec_command *cec_command)
uint8_t	google_chromeec_get_switches (void)
void	google_chromeec_ioport_range (uint16_t *out_base, size_t *out_size)
int	google_chromeec_command (struct chromeec_command *cec_command)
	Send a command to a CrOS EC. More...
static void	lpc_ec_init (struct device *dev)
static void	lpc_ec_read_resources (struct device *dev)
static void	enable_dev (struct device *dev)
static int	google_chromeec_data_ready (u16 port)
enum host_event_code	google_chromeec_get_event (void)

Variables
static struct device_operations	ops
static struct pnp_info	pnp_dev_info []
struct chip_operations	ec_google_chromeec_ops

Function Documentation

enable_dev()

static void enable_dev ( struct device *  dev )

static

Definition at line 448 of file ec_lpc.c.

google_chromeec_command()

int google_chromeec_command

(

struct chromeec_command *

cec_command

)

Send a command to a CrOS EC.

Parameters

cec_command

CrOS EC command to send

Returns

0 for success. Non-zero for error.

Definition at line 384 of file ec_lpc.c.

References ec_lpc_host_args::command_version, EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED, EC_HOST_CMD_FLAG_VERSION_3, google_chromeec_command_v1(), google_chromeec_command_v3(), and google_chromeec_command_version().

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google_chromeec_command_v1()

static int google_chromeec_command_v1 ( struct chromeec_command *  cec_command )

static

Definition at line 284 of file ec_lpc.c.

References args, BIOS_ERR, EC_HOST_ARGS_FLAG_FROM_HOST, EC_HOST_ARGS_FLAG_TO_HOST, EC_LPC_ADDR_HOST_ARGS, EC_LPC_ADDR_HOST_CMD, EC_LPC_ADDR_HOST_DATA, EC_LPC_ADDR_HOST_PARAM, google_chromeec_wait_ready(), NULL, printk, read_byte(), read_bytes(), write_byte(), and write_bytes().

Referenced by google_chromeec_command().

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google_chromeec_command_v3()

static int google_chromeec_command_v3 ( struct chromeec_command *  cec_command )

static

Definition at line 179 of file ec_lpc.c.

References BIOS_ERR, ec_host_request::checksum, ec_host_request::command, ec_host_request::command_version, ec_host_request::data_len, ec_host_response::data_len, EC_CMD_PASSTHRU_OFFSET, EC_COMMAND_PROTOCOL_3, EC_HOST_REQUEST_VERSION, EC_HOST_RESPONSE_VERSION, EC_LPC_ADDR_HOST_CMD, EC_LPC_ADDR_HOST_DATA, EC_LPC_ADDR_HOST_PACKET, EC_LPC_HOST_PACKET_SIZE, google_chromeec_wait_ready(), NULL, printk, read_byte(), read_bytes(), ec_host_request::reserved, ec_host_response::reserved, ec_host_request::struct_version, ec_host_response::struct_version, write_byte(), and write_bytes().

Referenced by google_chromeec_command().

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google_chromeec_command_version()

static int google_chromeec_command_version ( void  )

static

Definition at line 148 of file ec_lpc.c.

References BIOS_ERR, EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED, EC_HOST_CMD_FLAG_VERSION_3, EC_LPC_ADDR_MEMMAP, EC_MEMMAP_HOST_CMD_FLAGS, EC_MEMMAP_ID, id1, printk, and read_byte().

Referenced by google_chromeec_command().

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google_chromeec_data_ready()

static int google_chromeec_data_ready ( u16  port )

static

Definition at line 458 of file ec_lpc.c.

References EC_LPC_CMDR_DATA, and google_chromeec_status_check().

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google_chromeec_get_event()

enum host_event_code google_chromeec_get_event

(

void

)

Definition at line 458 of file ec_lpc.c.

google_chromeec_get_switches()

uint8_t google_chromeec_get_switches

(

void

)

Definition at line 359 of file ec_lpc.c.

References EC_LPC_ADDR_MEMMAP, EC_MEMMAP_SWITCHES, and read_byte().

Referenced by get_lid_switch(), and get_recovery_mode_switch().

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google_chromeec_ioport_range()

void google_chromeec_ioport_range	(	uint16_t *	out_base,
		size_t *	out_size
	)

Definition at line 364 of file ec_lpc.c.

References assert, base, CONFIG, EC_HOST_CMD_REGION0, EC_HOST_CMD_REGION_SIZE, EC_LPC_ADDR_MEMMAP, EC_MEMMAP_SIZE, MEC_EMI_BASE, and MEC_EMI_SIZE.

Referenced by bootblock_ec_init(), early_ec_init(), and lpc_ec_read_resources().

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google_chromeec_status_check()

static int google_chromeec_status_check ( u16  port, u8  mask, u8  cond  )

static

Definition at line 94 of file ec_lpc.c.

References mask, read_byte(), stopwatch_expired(), stopwatch_init_usecs_expire(), udelay(), and USECS_PER_SEC.

Referenced by google_chromeec_data_ready(), and google_chromeec_wait_ready().

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google_chromeec_wait_ready()

static int google_chromeec_wait_ready ( u16  port )

static

Definition at line 111 of file ec_lpc.c.

References EC_LPC_CMDR_BUSY, EC_LPC_CMDR_PENDING, and google_chromeec_status_check().

Referenced by google_chromeec_command_v1(), and google_chromeec_command_v3().

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lpc_ec_init()

static void lpc_ec_init ( struct device *  dev )

static

Definition at line 400 of file ec_lpc.c.

References device::enabled, and google_chromeec_init().

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lpc_ec_read_resources()

static void lpc_ec_read_resources ( struct device *  dev )

static

Definition at line 419 of file ec_lpc.c.

References resource::base, base, resource::flags, google_chromeec_ioport_range(), IORESOURCE_ASSIGNED, IORESOURCE_FIXED, IORESOURCE_IO, new_resource(), and resource::size.

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read_byte()

static u8 read_byte ( u16  port )

inlinestatic

Definition at line 48 of file ec_lpc.c.

References NULL, and read_bytes().

Referenced by google_chromeec_command_v1(), google_chromeec_command_v3(), google_chromeec_command_version(), google_chromeec_get_switches(), and google_chromeec_status_check().

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read_bytes()

static void read_bytes ( u16  port, unsigned int  length, u8 *  dest, u8 *  csum  )

static

Definition at line 24 of file ec_lpc.c.

References inb(), length, MEC_EMI_BASE, MEC_EMI_RANGE_END, MEC_EMI_RANGE_START, mec_io_bytes(), and MEC_IO_READ.

Referenced by google_chromeec_command_v1(), google_chromeec_command_v3(), and read_byte().

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write_byte()

static u8 write_byte ( u8  val, u16  port  )

inlinestatic

Definition at line 87 of file ec_lpc.c.

References NULL, val, and write_bytes().

Referenced by google_chromeec_command_v1(), and google_chromeec_command_v3().

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write_bytes()

static void write_bytes ( u16  port, unsigned int  length, u8 *  msg, u8 *  csum  )

static

Definition at line 63 of file ec_lpc.c.

References length, MEC_EMI_BASE, MEC_EMI_RANGE_END, MEC_EMI_RANGE_START, mec_io_bytes(), MEC_IO_WRITE, and outb().

Referenced by google_chromeec_command_v1(), google_chromeec_command_v3(), and write_byte().

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Variable Documentation

ec_google_chromeec_ops

struct chip_operations ec_google_chromeec_ops

Initial value:

= {
 
        .enable_dev = enable_dev,
}

Definition at line 448 of file ec_lpc.c.

ops

struct device_operations ops

static

Initial value:

= {
        .init             = lpc_ec_init,
        .read_resources   = lpc_ec_read_resources,
        .set_resources    = noop_set_resources,
        .scan_bus         = scan_static_bus,
 
 
 
 
}

Definition at line 419 of file ec_lpc.c.

pnp_dev_info

struct pnp_info pnp_dev_info[]

static

Initial value:

= {
        { NULL, 0, 0, 0, }
}

Definition at line 419 of file ec_lpc.c.