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path: root/drivers/misc/ibmasm/dot_command.c
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Diffstat (limited to 'drivers/misc/ibmasm/dot_command.c')
-rw-r--r--drivers/misc/ibmasm/dot_command.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/misc/ibmasm/dot_command.c b/drivers/misc/ibmasm/dot_command.c
new file mode 100644
index 000000000..d7b2ca358
--- /dev/null
+++ b/drivers/misc/ibmasm/dot_command.c
@@ -0,0 +1,152 @@
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com>
+ *
+ */
+
+#include "ibmasm.h"
+#include "dot_command.h"
+
+/**
+ * Dispatch an incoming message to the specific handler for the message.
+ * Called from interrupt context.
+ */
+void ibmasm_receive_message(struct service_processor *sp, void *message, int message_size)
+{
+ u32 size;
+ struct dot_command_header *header = (struct dot_command_header *)message;
+
+ if (message_size == 0)
+ return;
+
+ size = get_dot_command_size(message);
+ if (size == 0)
+ return;
+
+ if (size > message_size)
+ size = message_size;
+
+ switch (header->type) {
+ case sp_event:
+ ibmasm_receive_event(sp, message, size);
+ break;
+ case sp_command_response:
+ ibmasm_receive_command_response(sp, message, size);
+ break;
+ case sp_heartbeat:
+ ibmasm_receive_heartbeat(sp, message, size);
+ break;
+ default:
+ dev_err(sp->dev, "Received unknown message from service processor\n");
+ }
+}
+
+
+#define INIT_BUFFER_SIZE 32
+
+
+/**
+ * send the 4.3.5.10 dot command (driver VPD) to the service processor
+ */
+int ibmasm_send_driver_vpd(struct service_processor *sp)
+{
+ struct command *command;
+ struct dot_command_header *header;
+ u8 *vpd_command;
+ u8 *vpd_data;
+ int result = 0;
+
+ command = ibmasm_new_command(sp, INIT_BUFFER_SIZE);
+ if (command == NULL)
+ return -ENOMEM;
+
+ header = (struct dot_command_header *)command->buffer;
+ header->type = sp_write;
+ header->command_size = 4;
+ header->data_size = 16;
+ header->status = 0;
+ header->reserved = 0;
+
+ vpd_command = command->buffer + sizeof(struct dot_command_header);
+ vpd_command[0] = 0x4;
+ vpd_command[1] = 0x3;
+ vpd_command[2] = 0x5;
+ vpd_command[3] = 0xa;
+
+ vpd_data = vpd_command + header->command_size;
+ vpd_data[0] = 0;
+ strcat(vpd_data, IBMASM_DRIVER_VPD);
+ vpd_data[10] = 0;
+ vpd_data[15] = 0;
+
+ ibmasm_exec_command(sp, command);
+ ibmasm_wait_for_response(command, IBMASM_CMD_TIMEOUT_NORMAL);
+
+ if (command->status != IBMASM_CMD_COMPLETE)
+ result = -ENODEV;
+
+ command_put(command);
+
+ return result;
+}
+
+struct os_state_command {
+ struct dot_command_header header;
+ unsigned char command[3];
+ unsigned char data;
+};
+
+/**
+ * send the 4.3.6 dot command (os state) to the service processor
+ * During driver init this function is called with os state "up".
+ * This causes the service processor to start sending heartbeats the
+ * driver.
+ * During driver exit the function is called with os state "down",
+ * causing the service processor to stop the heartbeats.
+ */
+int ibmasm_send_os_state(struct service_processor *sp, int os_state)
+{
+ struct command *cmd;
+ struct os_state_command *os_state_cmd;
+ int result = 0;
+
+ cmd = ibmasm_new_command(sp, sizeof(struct os_state_command));
+ if (cmd == NULL)
+ return -ENOMEM;
+
+ os_state_cmd = (struct os_state_command *)cmd->buffer;
+ os_state_cmd->header.type = sp_write;
+ os_state_cmd->header.command_size = 3;
+ os_state_cmd->header.data_size = 1;
+ os_state_cmd->header.status = 0;
+ os_state_cmd->command[0] = 4;
+ os_state_cmd->command[1] = 3;
+ os_state_cmd->command[2] = 6;
+ os_state_cmd->data = os_state;
+
+ ibmasm_exec_command(sp, cmd);
+ ibmasm_wait_for_response(cmd, IBMASM_CMD_TIMEOUT_NORMAL);
+
+ if (cmd->status != IBMASM_CMD_COMPLETE)
+ result = -ENODEV;
+
+ command_put(cmd);
+ return result;
+}