diff options
| -rw-r--r-- | drivers/platform/chrome/Makefile | 2 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 97 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc_reg.c | 101 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc_reg.h | 45 |
4 files changed, 97 insertions, 148 deletions
diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile index c5583c48d1e5..5a2bcef4b07c 100644 --- a/drivers/platform/chrome/Makefile +++ b/drivers/platform/chrome/Makefile @@ -10,7 +10,7 @@ obj-$(CONFIG_CROS_EC_I2C) += cros_ec_i2c.o obj-$(CONFIG_CROS_EC_ISHTP) += cros_ec_ishtp.o obj-$(CONFIG_CROS_EC_RPMSG) += cros_ec_rpmsg.o obj-$(CONFIG_CROS_EC_SPI) += cros_ec_spi.o -cros_ec_lpcs-objs := cros_ec_lpc.o cros_ec_lpc_reg.o +cros_ec_lpcs-objs := cros_ec_lpc.o cros_ec_lpcs-$(CONFIG_CROS_EC_LPC_MEC) += cros_ec_lpc_mec.o obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpcs.o obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o cros_ec_trace.o diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index aaa21803633a..8d06addec5e2 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -23,7 +23,7 @@ #include <linux/printk.h> #include <linux/suspend.h> -#include "cros_ec_lpc_reg.h" +#include "cros_ec_lpc_mec.h" #define DRV_NAME "cros_ec_lpcs" #define ACPI_DRV_NAME "GOOG0004" @@ -31,6 +31,101 @@ /* True if ACPI device is present */ static bool cros_ec_lpc_acpi_device_found; +static u8 lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) +{ + int sum = 0; + int i; + + for (i = 0; i < length; ++i) { + dest[i] = inb(offset + i); + sum += dest[i]; + } + + /* Return checksum of all bytes read */ + return sum; +} + +static u8 lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) +{ + int sum = 0; + int i; + + for (i = 0; i < length; ++i) { + outb(msg[i], offset + i); + sum += msg[i]; + } + + /* Return checksum of all bytes written */ + return sum; +} + +#ifdef CONFIG_CROS_EC_LPC_MEC + +static u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, + u8 *dest) +{ + int in_range = cros_ec_lpc_mec_in_range(offset, length); + + if (in_range < 0) + return 0; + + return in_range ? + cros_ec_lpc_io_bytes_mec(MEC_IO_READ, + offset - EC_HOST_CMD_REGION0, + length, dest) : + lpc_read_bytes(offset, length, dest); +} + +static u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, + u8 *msg) +{ + int in_range = cros_ec_lpc_mec_in_range(offset, length); + + if (in_range < 0) + return 0; + + return in_range ? + cros_ec_lpc_io_bytes_mec(MEC_IO_WRITE, + offset - EC_HOST_CMD_REGION0, + length, msg) : + lpc_write_bytes(offset, length, msg); +} + +static void cros_ec_lpc_reg_init(void) +{ + cros_ec_lpc_mec_init(EC_HOST_CMD_REGION0, + EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SIZE); +} + +static void cros_ec_lpc_reg_destroy(void) +{ + cros_ec_lpc_mec_destroy(); +} + +#else /* CONFIG_CROS_EC_LPC_MEC */ + +static u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, + u8 *dest) +{ + return lpc_read_bytes(offset, length, dest); +} + +static u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, + u8 *msg) +{ + return lpc_write_bytes(offset, length, msg); +} + +static void cros_ec_lpc_reg_init(void) +{ +} + +static void cros_ec_lpc_reg_destroy(void) +{ +} + +#endif /* CONFIG_CROS_EC_LPC_MEC */ + static int ec_response_timed_out(void) { unsigned long one_second = jiffies + HZ; diff --git a/drivers/platform/chrome/cros_ec_lpc_reg.c b/drivers/platform/chrome/cros_ec_lpc_reg.c deleted file mode 100644 index 0f5cd0ac8b49..000000000000 --- a/drivers/platform/chrome/cros_ec_lpc_reg.c +++ /dev/null @@ -1,101 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -// LPC interface for ChromeOS Embedded Controller -// -// Copyright (C) 2016 Google, Inc - -#include <linux/io.h> -#include <linux/mfd/cros_ec.h> -#include <linux/mfd/cros_ec_commands.h> - -#include "cros_ec_lpc_mec.h" - -static u8 lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) -{ - int i; - int sum = 0; - - for (i = 0; i < length; ++i) { - dest[i] = inb(offset + i); - sum += dest[i]; - } - - /* Return checksum of all bytes read */ - return sum; -} - -static u8 lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) -{ - int i; - int sum = 0; - - for (i = 0; i < length; ++i) { - outb(msg[i], offset + i); - sum += msg[i]; - } - - /* Return checksum of all bytes written */ - return sum; -} - -#ifdef CONFIG_CROS_EC_LPC_MEC - -u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) -{ - int in_range = cros_ec_lpc_mec_in_range(offset, length); - - if (in_range < 0) - return 0; - - return in_range ? - cros_ec_lpc_io_bytes_mec(MEC_IO_READ, - offset - EC_HOST_CMD_REGION0, - length, dest) : - lpc_read_bytes(offset, length, dest); -} - -u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) -{ - int in_range = cros_ec_lpc_mec_in_range(offset, length); - - if (in_range < 0) - return 0; - - return in_range ? - cros_ec_lpc_io_bytes_mec(MEC_IO_WRITE, - offset - EC_HOST_CMD_REGION0, - length, msg) : - lpc_write_bytes(offset, length, msg); -} - -void cros_ec_lpc_reg_init(void) -{ - cros_ec_lpc_mec_init(EC_HOST_CMD_REGION0, - EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SIZE); -} - -void cros_ec_lpc_reg_destroy(void) -{ - cros_ec_lpc_mec_destroy(); -} - -#else /* CONFIG_CROS_EC_LPC_MEC */ - -u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest) -{ - return lpc_read_bytes(offset, length, dest); -} - -u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg) -{ - return lpc_write_bytes(offset, length, msg); -} - -void cros_ec_lpc_reg_init(void) -{ -} - -void cros_ec_lpc_reg_destroy(void) -{ -} - -#endif /* CONFIG_CROS_EC_LPC_MEC */ diff --git a/drivers/platform/chrome/cros_ec_lpc_reg.h b/drivers/platform/chrome/cros_ec_lpc_reg.h deleted file mode 100644 index 416fd2572182..000000000000 --- a/drivers/platform/chrome/cros_ec_lpc_reg.h +++ /dev/null @@ -1,45 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * LPC interface for ChromeOS Embedded Controller - * - * Copyright (C) 2016 Google, Inc - */ - -#ifndef __CROS_EC_LPC_REG_H -#define __CROS_EC_LPC_REG_H - -/** - * cros_ec_lpc_read_bytes - Read bytes from a given LPC-mapped address. - * Returns 8-bit checksum of all bytes read. - * - * @offset: Base read address - * @length: Number of bytes to read - * @dest: Destination buffer - */ -u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest); - -/** - * cros_ec_lpc_write_bytes - Write bytes to a given LPC-mapped address. - * Returns 8-bit checksum of all bytes written. - * - * @offset: Base write address - * @length: Number of bytes to write - * @msg: Write data buffer - */ -u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg); - -/** - * cros_ec_lpc_reg_init - * - * Initialize register I/O. - */ -void cros_ec_lpc_reg_init(void); - -/** - * cros_ec_lpc_reg_destroy - * - * Cleanup reg I/O. - */ -void cros_ec_lpc_reg_destroy(void); - -#endif /* __CROS_EC_LPC_REG_H */ |