diff options
Diffstat (limited to 'src/ec/google/chromeec/ec.c')
| -rw-r--r-- | src/ec/google/chromeec/ec.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c index 5ae0178ebf..d8305292c1 100644 --- a/src/ec/google/chromeec/ec.c +++ b/src/ec/google/chromeec/ec.c @@ -21,7 +21,6 @@ #include <console/console.h> #include <arch/io.h> #include <delay.h> -#include <device/device.h> #include <device/pnp.h> #ifndef __PRE_RAM__ #include <elog.h> @@ -35,172 +34,6 @@ #include "ec_commands.h" #include <vendorcode/google/chromeos/chromeos.h> -/* an internal API to send a command to the EC and wait for response. */ -struct chromeec_command { - u8 cmd_code; /* command code in, status out */ - u8 cmd_version; /* command version */ - const void* cmd_data_in; /* command data, if any */ - void* cmd_data_out; /* command response, if any */ - u16 cmd_size_in; /* size of command data */ - u16 cmd_size_out; /* expected size of command response in, - * actual received size out */ -}; - -static int google_chromeec_wait_ready(u16 port) -{ - u8 ec_status = inb(port); - u32 time_count = 0; - - /* - * One second is more than plenty for any EC operation to complete - * (and the bus accessing/code execution) overhead will make the - * timeout even longer. - */ -#define MAX_EC_TIMEOUT_US 1000000 - - while (ec_status & - (EC_LPC_CMDR_PENDING | EC_LPC_CMDR_BUSY)) { - udelay(1); - if (time_count++ == MAX_EC_TIMEOUT_US) - return -1; - ec_status = inb(port); - } - return 0; -} - -static int google_chromeec_cmd_args_supported(void) -{ - if (inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_ID) == 'E' && - inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_ID + 1) == 'C' && - (inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_HOST_CMD_FLAGS) & - EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED)) - return 1; - - return 0; -} - -static int google_chromeec_command_old(struct chromeec_command *cec_command) -{ - int i; - - if (cec_command->cmd_version) { - printk(BIOS_ERR, "Invalid version for command protocol!\n"); - return 1; - } - - if (google_chromeec_wait_ready(EC_LPC_ADDR_HOST_CMD)) { - printk(BIOS_ERR, "Timeout waiting for EC ready!\n"); - return 1; - } - - /* Copy command data, if any. */ - for (i = 0; i < cec_command->cmd_size_in; i++) - outb(((char*)cec_command->cmd_data_in)[i], - EC_LPC_ADDR_OLD_PARAM + i); - - /* Issue the command. */ - outb(cec_command->cmd_code, EC_LPC_ADDR_HOST_CMD); - - if (google_chromeec_wait_ready(EC_LPC_ADDR_HOST_CMD)) { - printk(BIOS_ERR, "Timeout waiting for EC process command %d!\n", - cec_command->cmd_code); - return 1; - } - - for (i = 0; i < cec_command->cmd_size_out; i++) - ((char*)cec_command->cmd_data_out)[i] = - inb(EC_LPC_ADDR_OLD_PARAM + i); - cec_command->cmd_code = inb(EC_LPC_ADDR_HOST_DATA); - return 0; -} - -static int google_chromeec_command(struct chromeec_command *cec_command) -{ - struct ec_lpc_host_args args; - const u8 *d; - u8 *dout; - u8 cmd_code = cec_command->cmd_code; - int csum; - int i; - - /* Fall back to old command protocol if necessary */ - if (!google_chromeec_cmd_args_supported()) - return google_chromeec_command_old(cec_command); - - /* Fill in args */ - args.flags = EC_HOST_ARGS_FLAG_FROM_HOST; - args.command_version = cec_command->cmd_version; - args.data_size = cec_command->cmd_size_in; - - /* Initialize checksum */ - csum = cmd_code + args.flags + args.command_version + args.data_size; - - /* Write data and update checksum */ - for (i = 0, d = (const u8 *)cec_command->cmd_data_in; - i < cec_command->cmd_size_in; i++, d++) { - outb(*d, EC_LPC_ADDR_HOST_PARAM + i); - csum += *d; - } - - /* Finalize checksum and write args */ - args.checksum = (u8)csum; - for (i = 0, d = (const u8 *)&args; i < sizeof(args); i++, d++) - outb(*d, EC_LPC_ADDR_HOST_ARGS + i); - - - /* Issue the command */ - outb(cmd_code, EC_LPC_ADDR_HOST_CMD); - - if (google_chromeec_wait_ready(EC_LPC_ADDR_HOST_CMD)) { - printk(BIOS_ERR, "Timeout waiting for EC process command %d!\n", - cec_command->cmd_code); - return 1; - } - - /* Check result */ - cec_command->cmd_code = inb(EC_LPC_ADDR_HOST_DATA); - if (cec_command->cmd_code) - return 1; - - /* Read back args */ - for (i = 0, dout = (u8 *)&args; i < sizeof(args); i++, dout++) - *dout = inb(EC_LPC_ADDR_HOST_ARGS + i); - - /* - * If EC didn't modify args flags, then somehow we sent a new-style - * command to an old EC, which means it would have read its params - * from the wrong place. - */ - if (!(args.flags & EC_HOST_ARGS_FLAG_TO_HOST)) { - printk(BIOS_ERR, "EC protocol mismatch\n"); - return 1; - } - - if (args.data_size > cec_command->cmd_size_out) { - printk(BIOS_ERR, "EC returned too much data\n"); - return 1; - } - cec_command->cmd_size_out = args.data_size; - - /* Start calculating response checksum */ - csum = cmd_code + args.flags + args.command_version + args.data_size; - - /* Read data, if any */ - for (i = 0, dout = (u8 *)cec_command->cmd_data_out; - i < args.data_size; i++, dout++) { - *dout = inb(EC_LPC_ADDR_HOST_PARAM + i); - csum += *dout; - } - - /* Verify checksum */ - if (args.checksum != (u8)csum) { - printk(BIOS_ERR, "EC response has invalid checksum\n"); - return 1; - } - - return 0; -} - int google_chromeec_kbbacklight(int percent) { struct chromeec_command cec_cmd; @@ -344,25 +177,6 @@ void google_chromeec_log_events(u32 mask) #endif } -u8 google_chromeec_get_event(void) -{ - if (google_chromeec_wait_ready(EC_LPC_ADDR_ACPI_CMD)) { - printk(BIOS_ERR, "Timeout waiting for EC ready!\n"); - return 1; - } - - /* Issue the ACPI query-event command */ - outb(EC_CMD_ACPI_QUERY_EVENT, EC_LPC_ADDR_ACPI_CMD); - - if (google_chromeec_wait_ready(EC_LPC_ADDR_ACPI_CMD)) { - printk(BIOS_ERR, "Timeout waiting for EC QUERY_EVENT!\n"); - return 0; - } - - /* Event (or 0 if none) is returned directly in the data byte */ - return inb(EC_LPC_ADDR_ACPI_DATA); -} - u16 google_chromeec_get_board_version(void) { struct chromeec_command cmd; |