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path: root/drivers/char/modem_interface/boot_protocol.c
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Diffstat (limited to 'drivers/char/modem_interface/boot_protocol.c')
-rw-r--r--drivers/char/modem_interface/boot_protocol.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/drivers/char/modem_interface/boot_protocol.c b/drivers/char/modem_interface/boot_protocol.c
new file mode 100644
index 00000000..ebb96a63
--- /dev/null
+++ b/drivers/char/modem_interface/boot_protocol.c
@@ -0,0 +1,417 @@
+/*
+ * kernel/driver/char/modem_interface/boot_protocol.c
+ *
+ * Generic modem boot protocol
+ *
+ * Author: Jiayong Yang(Jiayong.Yang@spreadtrum.com)
+ * Created: Jul 27, 2012
+ * Copyright: Spreadtrum Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/semaphore.h>
+#include <linux/irqflags.h>
+#include "modem_buffer.h"
+#include "modem_interface_driver.h"
+
+#define SETUP_PACKET_SIZE 8
+#define ACK_PACKET_SIZE 6
+typedef struct dl_setup_packet{
+ unsigned short data_packet_size;
+ unsigned short data_type;
+ unsigned short data_check_sum;
+ unsigned short setup_check_sum;
+} SETUP_PACKET_T;
+typedef enum MBUS_DL_status{
+ MBUS_DL_IDLE,
+ MBUS_DL_WAIT_REQ,
+ MBUS_DL_WAIT_RTS,
+ MBUS_DL_SETUP,
+ MBUS_DL_SETUP_COMP,
+ MBUS_DL_DATA,
+ MBUS_DL_DATA_COMP,
+ MBUS_DL_ACK
+}DL_STATUS_E;
+
+
+extern void modem_intf_ctrl_gpio_handle_boot(int status);
+extern int dloader_abort();
+
+char *boot_status_string(DL_STATUS_E status)
+{
+ switch(status){
+ case MBUS_DL_IDLE: return "DL_IDLE";
+ case MBUS_DL_WAIT_REQ: return "DL_WAIT_REQ";
+ case MBUS_DL_WAIT_RTS: return "DL_WAIT_RTS";
+ case MBUS_DL_SETUP: return "DL_SETUP";
+ case MBUS_DL_SETUP_COMP: return "DL_SETUP_COMP";
+ case MBUS_DL_DATA: return "DL_DATA";
+ case MBUS_DL_DATA_COMP: return "DL_DATA_COMP";
+ case MBUS_DL_ACK: return "DL_ACK";
+ default: break;
+ }
+ return "UNKNOWN status";
+}
+
+
+
+static void boot_idle(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ int send_bffer_index=0xFF;
+ switch(msg->type){
+ case MODEM_SLAVE_RTS:
+ device->status = (int)MBUS_DL_WAIT_REQ;
+ break;
+ case MODEM_TRANSFER_REQ:
+ send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if (send_bffer_index!= 0xFF) {
+ device->out_transfering = send_bffer_index;
+ device->status = (int)MBUS_DL_WAIT_RTS;
+ }
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+ }
+}
+static void boot_wait_request(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ int send_bffer_index=0xFF;
+ switch(msg->type){
+ case MODEM_TRANSFER_REQ:
+ send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if(send_bffer_index!= 0xFF){
+ device->out_transfering = send_bffer_index;
+ device->op->write(device->send_buffer.buffer[send_bffer_index].addr,SETUP_PACKET_SIZE);
+ device->status = (int)MBUS_DL_SETUP;
+ }
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ case MODEM_TRANSFER_END:
+ break;
+ default:
+ break;
+ }
+}
+static void boot_wait_RTS(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ int send_bffer_index=0xFF;
+ unsigned short *data;
+ switch(msg->type){
+ case MODEM_SLAVE_RTS:
+ if(device->out_transfering < 2){
+ send_bffer_index = device->out_transfering;
+ data = (unsigned short *)device->send_buffer.buffer[send_bffer_index].addr;
+ device->op->write((char *)data,SETUP_PACKET_SIZE);
+ device->status = (int)MBUS_DL_SETUP;
+ }
+ break;
+ case MODEM_TRANSFER_REQ:
+ device->out_transfer_pending = 1;
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+ }
+}
+static void boot_setup(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ int send_bffer_index=0xFF;
+ char *buffer;
+ int size;
+ switch(msg->type){
+ case MODEM_TRANSFER_END:
+ device->status = (int)MBUS_DL_SETUP_COMP;
+ break;
+ case MODEM_TRANSFER_REQ:
+ device->out_transfer_pending = 1;
+ break;
+ case MODEM_SLAVE_RTS:
+ if(device->out_transfering < 2){
+ send_bffer_index = device->out_transfering;
+ buffer = &device->send_buffer.buffer[send_bffer_index].addr[SETUP_PACKET_SIZE];
+ size = device->send_buffer.buffer[send_bffer_index].write_point;
+ if (size <= SETUP_PACKET_SIZE)
+ size = 12;
+ device->op->write(buffer,size - SETUP_PACKET_SIZE);
+ pingpang_buffer_send_complete(&device->send_buffer,device->out_transfering);
+ device->out_transfering = 0xFF;
+ device->status = (int)MBUS_DL_DATA;
+ }
+ if(device->out_transfer_pending){
+ send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if(send_bffer_index!= 0xFF){
+ device->out_transfering = send_bffer_index;
+ size = device->send_buffer.buffer[send_bffer_index].write_point;
+ device->op->write(device->send_buffer.buffer[send_bffer_index].addr,size);
+ }
+ device->out_transfer_pending = 0;
+ }
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+ }
+}
+
+static void boot_setup_comp(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ int send_bffer_index=0xFF;
+ char *buffer;
+ int size;
+
+ switch(msg->type){
+ case MODEM_SLAVE_RTS:
+ if(device->out_transfering < 2){
+ send_bffer_index = device->out_transfering;
+ buffer = &device->send_buffer.buffer[send_bffer_index].addr[SETUP_PACKET_SIZE];
+ size = device->send_buffer.buffer[send_bffer_index].write_point;
+ if (size <= SETUP_PACKET_SIZE)
+ size = 12;
+ device->op->write(buffer,size - SETUP_PACKET_SIZE);
+ device->status = (int)MBUS_DL_DATA;
+ if(device->out_transfer_pending){
+ pingpang_buffer_send_complete(&device->send_buffer,device->out_transfering);
+ device->out_transfering = 0xFF;
+ send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if(send_bffer_index!= 0xFF){
+ device->out_transfering = send_bffer_index;
+ size = device->send_buffer.buffer[send_bffer_index].write_point;
+ device->op->write(device->send_buffer.buffer[send_bffer_index].addr,size);
+ }
+ device->out_transfer_pending = 0;
+ }
+ }
+ break;
+ case MODEM_TRANSFER_REQ:
+ device->out_transfer_pending = 1;
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+
+ }
+}
+static void boot_data(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ unsigned short *data;
+ int send_bffer_index=0xFF;
+ char *buffer;
+ int size;
+ switch(msg->type){
+ case MODEM_TRANSFER_END:
+ if(device->out_transfering < 2){
+ pingpang_buffer_send_complete(&device->send_buffer,device->out_transfering);
+ device->out_transfering = 0xFF;
+ device->status = (int)MBUS_DL_DATA_COMP;
+ }
+ break;
+ case MODEM_TRANSFER_REQ:
+ if(device->out_transfering < 2){
+ pingpang_buffer_send_complete(&device->send_buffer,device->out_transfering);
+ device->out_transfering = 0xFF;
+ }
+ send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if(send_bffer_index!= 0xFF){
+ device->out_transfering = send_bffer_index;
+ size = device->send_buffer.buffer[send_bffer_index].write_point;
+ device->op->write(device->send_buffer.buffer[send_bffer_index].addr,size);
+ }
+ break;
+ case MODEM_SLAVE_RTS:
+ pingpang_buffer_send_complete(&device->send_buffer,device->out_transfering);
+ device->op->read(device->recv_buffer.buffer[1].addr,8);
+ device->out_transfering = 0xFF;
+ data = (unsigned short *)device->recv_buffer.buffer[1].addr;
+ device->status = (int)MBUS_DL_ACK;
+ if(device->out_transfer_pending){
+ send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if(send_bffer_index!= 0xFF){
+ device->out_transfering = send_bffer_index;
+ size = device->send_buffer.buffer[send_bffer_index].write_point;
+ device->op->write(device->send_buffer.buffer[send_bffer_index].addr,size);
+ }
+ device->out_transfer_pending = 0;
+ }
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+ }
+}
+static void boot_data_comp(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ unsigned short *data;
+ switch(msg->type){
+ case MODEM_SLAVE_RTS:
+ device->op->read(device->recv_buffer.buffer[1].addr,8);
+ data = (unsigned short *)device->recv_buffer.buffer[1].addr;
+ device->status = (int)MBUS_DL_ACK;
+ break;
+ case MODEM_TRANSFER_REQ:
+ device->out_transfer_pending = 1;
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+ }
+}
+static void boot_ack(struct modem_message_node *msg,struct modem_intf_device *device)
+{
+ int send_bffer_index=0xFF;
+ unsigned short *data;
+
+ switch(msg->type){
+ case MODEM_TRANSFER_END:
+ save_to_receive_buffer(&device->recv_buffer,device->recv_buffer.buffer[1].addr,ACK_PACKET_SIZE);
+ if(device->out_transfer_pending){
+ device->out_transfer_pending = 0;
+ device->out_transfering = send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+ if(device->out_transfering!=0xff){
+ device->status = (int)MBUS_DL_WAIT_RTS;
+ break;
+ }
+ }
+ device->status = (int)MBUS_DL_IDLE;
+ break;
+ case MODEM_TRANSFER_REQ:
+ device->out_transfer_pending = 1;
+ break;
+ case MODEM_SLAVE_RTS:
+ data = (unsigned short *)device->recv_buffer.buffer[1].addr;
+ save_to_receive_buffer(&device->recv_buffer,data,ACK_PACKET_SIZE);
+ if(device->out_transfer_pending){
+ device->out_transfer_pending = 0;
+ device->out_transfering = send_bffer_index = pingpang_buffer_send(&device->send_buffer);
+
+ data = (unsigned short *)device->send_buffer.buffer[send_bffer_index].addr;
+ device->op->write((char *)data,SETUP_PACKET_SIZE);
+
+ device->status = (int)MBUS_DL_SETUP;
+ } else {
+ device->status = (int)MBUS_DL_WAIT_REQ;
+ }
+ break;
+ case MODEM_SET_MODE:
+ modem_intf_set_mode(msg->parameter2, 1);
+ device->status = (int)MBUS_DL_IDLE;
+ device->out_transfering = 0;
+ dloader_abort();
+ break;
+ default:
+ break;
+ }
+}
+extern unsigned long sprd_get_system_tick(void);
+extern void dloader_record_timestamp(unsigned long time);
+
+void boot_protocol_process_dl_messages(struct modem_intf_device *device,
+ struct modem_message_node *msg)
+{
+ DL_STATUS_E status;
+
+ status =(DL_STATUS_E) device->status;
+
+ switch(status){
+ case MBUS_DL_IDLE:
+ boot_idle(msg,device);
+ break;
+ case MBUS_DL_SETUP:
+ boot_setup(msg,device);
+ break;
+ case MBUS_DL_WAIT_REQ:
+ boot_wait_request(msg,device);
+ break;
+ case MBUS_DL_WAIT_RTS:
+ boot_wait_RTS(msg,device);
+ break;
+ case MBUS_DL_SETUP_COMP:
+ boot_setup_comp(msg,device);
+ break;
+ case MBUS_DL_DATA:
+ boot_data(msg,device);
+ break;
+ case MBUS_DL_DATA_COMP:
+ boot_data_comp(msg,device);
+ break;
+ case MBUS_DL_ACK:
+ boot_ack(msg,device);
+ break;
+ }
+}
+
+void boot_protocol(struct modem_message_node *msg)
+{
+ struct modem_intf_device *device;
+
+ if((msg == NULL)||(msg->parameter1==0))
+ return;
+
+ device = (struct modem_intf_device *)msg->parameter1;
+
+ printk(">>boot entry(%d,%d) status: %s message: %s \n",
+ device->out_transfer_pending,device->out_transfering,
+ boot_status_string((DL_STATUS_E )device->status),
+ modem_intf_msg_string(msg->type));
+
+ //filter messages
+ switch(msg->type){
+ case MODEM_CTRL_GPIO_CHG:
+ modem_intf_ctrl_gpio_handle_boot(msg->parameter2);
+ break;
+ case MODEM_USER_REQ:
+ //now, just ignore user req in boot mode
+ break;
+ case MODEM_BOOT_CMP:
+ modem_intf_set_mode(MODEM_MODE_BOOTCOMP, 0);
+ break;
+ default:
+ //all other messages
+ boot_protocol_process_dl_messages(device, msg);
+ break;
+ }
+
+}
generated by cgit v1.3.1 (git 2.54.0) at 2026-08-15 16:36:40 +0000