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6101cebb6a
This will allow more efficient access to EC-provided data (temperature, fan, battery) by the main processor. Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=chrome-os-partner:7857 TEST='ectool hello' from link main processor should still work Change-Id: I2dc683f3441b34de9fb4debf772e386b9fdcfa82
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* LPC module for Chrome EC */
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#ifndef __CROS_EC_LPC_H
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#define __CROS_EC_LPC_H
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#include "common.h"
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/* Manually generates an IRQ to host.
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* Note that the irq_num == 0 would set the AH bit (Active High).
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*/
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void lpc_manual_irq(int irq_num);
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/* Initializes the LPC module. */
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int lpc_init(void);
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/* Returns a pointer to the host command data buffer. This buffer
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* must only be accessed between a notification to
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* host_command_received() and a subsequent call to
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* lpc_SendHostResponse(). <slot> is 0 for kernel-originated
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* commands, 1 for usermode-originated commands. */
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uint8_t *lpc_get_host_range(int slot);
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/* Returns a pointer to the memory-mapped buffer. This buffer is writable at
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* any time, and the host can read it at any time. */
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uint8_t *lpc_get_memmap_range(void);
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/* Sends a response to a host command. The bottom 4 bits of <status>
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* are sent in the status byte. <slot> is 0 for kernel-originated
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* commands, 1 for usermode-originated commands. */
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void lpc_send_host_response(int slot, int status);
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/* Return true if the TOH is still set */
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int lpc_keyboard_has_char(void);
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/* Send a byte to host via port 0x60 and asserts IRQ if specified. */
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void lpc_keyboard_put_char(uint8_t chr, int send_irq);
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/* Returns non-zero if the COMx interface has received a character. */
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int lpc_comx_has_char(void);
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/* Returns the next character pending on the COMx interface. */
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int lpc_comx_get_char(void);
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/* Puts a character to the COMx LPC interface. */
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void lpc_comx_put_char(int c);
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#endif /* __CROS_EC_LPC_H */
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