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author | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2019-06-14 23:43:00 +0200 |
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committer | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2019-06-20 11:53:52 +0200 |
commit | 4116fd25c5262e90427f9840e861a8553374a867 (patch) | |
tree | bf04895317794726e5f58a46ee690f86df64d8e5 /drivers/platform/chrome/cros_ec_lpc.c | |
parent | d096aa3eb6045a6a475a0239f3471c59eedf3d61 (diff) | |
download | linux-stable-4116fd25c5262e90427f9840e861a8553374a867.tar.gz linux-stable-4116fd25c5262e90427f9840e861a8553374a867.tar.bz2 linux-stable-4116fd25c5262e90427f9840e861a8553374a867.zip |
platform/chrome: cros_ec_lpc: Merge cros_ec_lpc and cros_ec_lpc_reg
The cros_ec_lpc_reg files are only used by the cros_ec_lpc core and
there isn't logical separation between them. So, merge those files into
the cros_ec_lpc also allowing us to drop the header file used for the
interface between the two.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Nick Crews <ncrews@chromium.org>
Diffstat (limited to 'drivers/platform/chrome/cros_ec_lpc.c')
-rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 97 |
1 files changed, 96 insertions, 1 deletions
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; |