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path: root/drivers/usb/serial/io_ti.c
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Diffstat (limited to 'drivers/usb/serial/io_ti.c')
-rw-r--r--drivers/usb/serial/io_ti.c279
1 files changed, 213 insertions, 66 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index ddbb8fe1046d..0ac1b10be1f7 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -71,6 +71,25 @@ struct product_info {
__u8 hardware_type; /* Type of hardware */
} __attribute__((packed));
+/*
+ * Edgeport firmware header
+ *
+ * "build_number" has been set to 0 in all three of the images I have
+ * seen, and Digi Tech Support suggests that it is safe to ignore it.
+ *
+ * "length" is the number of bytes of actual data following the header.
+ *
+ * "checksum" is the low order byte resulting from adding the values of
+ * all the data bytes.
+ */
+struct edgeport_fw_hdr {
+ u8 major_version;
+ u8 minor_version;
+ __le16 build_number;
+ __le16 length;
+ u8 checksum;
+} __packed;
+
struct edgeport_port {
__u16 uart_base;
__u16 dma_address;
@@ -101,6 +120,9 @@ struct edgeport_serial {
struct mutex es_lock;
int num_ports_open;
struct usb_serial *serial;
+ struct delayed_work heartbeat_work;
+ int fw_version;
+ bool use_heartbeat;
};
@@ -187,10 +209,6 @@ static const struct usb_device_id id_table_combined[] = {
MODULE_DEVICE_TABLE(usb, id_table_combined);
-static unsigned char OperationalMajorVersion;
-static unsigned char OperationalMinorVersion;
-static unsigned short OperationalBuildNumber;
-
static int closing_wait = EDGE_CLOSING_WAIT;
static bool ignore_cpu_rev;
static int default_uart_mode; /* RS232 */
@@ -209,6 +227,26 @@ static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
static int edge_create_sysfs_attrs(struct usb_serial_port *port);
static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
+/*
+ * Some release of Edgeport firmware "down3.bin" after version 4.80
+ * introduced code to automatically disconnect idle devices on some
+ * Edgeport models after periods of inactivity, typically ~60 seconds.
+ * This occurs without regard to whether ports on the device are open
+ * or not. Digi International Tech Support suggested:
+ *
+ * 1. Adding driver "heartbeat" code to reset the firmware timer by
+ * requesting a descriptor record every 15 seconds, which should be
+ * effective with newer firmware versions that require it, and benign
+ * with older versions that do not. In practice 40 seconds seems often
+ * enough.
+ * 2. The heartbeat code is currently required only on Edgeport/416 models.
+ */
+#define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
+#define FW_HEARTBEAT_SECS 40
+
+/* Timeouts in msecs: firmware downloads take longer */
+#define TI_VSEND_TIMEOUT_DEFAULT 1000
+#define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
static int ti_vread_sync(struct usb_device *dev, __u8 request,
__u16 value, __u16 index, u8 *data, int size)
@@ -228,14 +266,14 @@ static int ti_vread_sync(struct usb_device *dev, __u8 request,
return 0;
}
-static int ti_vsend_sync(struct usb_device *dev, __u8 request,
- __u16 value, __u16 index, u8 *data, int size)
+static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
+ u16 index, u8 *data, int size, int timeout)
{
int status;
status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
- value, index, data, size, 1000);
+ value, index, data, size, timeout);
if (status < 0)
return status;
if (status != size) {
@@ -250,7 +288,8 @@ static int send_cmd(struct usb_device *dev, __u8 command,
__u8 moduleid, __u16 value, u8 *data,
int size)
{
- return ti_vsend_sync(dev, command, value, moduleid, data, size);
+ return ti_vsend_sync(dev, command, value, moduleid, data, size,
+ TI_VSEND_TIMEOUT_DEFAULT);
}
/* clear tx/rx buffers and fifo in TI UMP */
@@ -378,9 +417,9 @@ static int write_boot_mem(struct edgeport_serial *serial,
}
for (i = 0; i < length; ++i) {
- status = ti_vsend_sync(serial->serial->dev,
- UMPC_MEMORY_WRITE, buffer[i],
- (__u16)(i + start_address), NULL, 0);
+ status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
+ buffer[i], (u16)(i + start_address), NULL,
+ 0, TI_VSEND_TIMEOUT_DEFAULT);
if (status)
return status;
}
@@ -421,10 +460,9 @@ static int write_i2c_mem(struct edgeport_serial *serial,
* regardless of host byte order.
*/
be_start_address = swab16((u16)start_address);
- status = ti_vsend_sync(serial->serial->dev,
- UMPC_MEMORY_WRITE, (__u16)address_type,
- be_start_address,
- buffer, write_length);
+ status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
+ (u16)address_type, be_start_address,
+ buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
if (status) {
dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
return status;
@@ -454,9 +492,8 @@ static int write_i2c_mem(struct edgeport_serial *serial,
*/
be_start_address = swab16((u16)start_address);
status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
- (__u16)address_type,
- be_start_address,
- buffer, write_length);
+ (u16)address_type, be_start_address, buffer,
+ write_length, TI_VSEND_TIMEOUT_DEFAULT);
if (status) {
dev_err(dev, "%s - ERROR %d\n", __func__, status);
return status;
@@ -748,18 +785,17 @@ exit:
}
/* Build firmware header used for firmware update */
-static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
+static int build_i2c_fw_hdr(u8 *header, struct device *dev,
+ const struct firmware *fw)
{
__u8 *buffer;
int buffer_size;
int i;
- int err;
__u8 cs = 0;
struct ti_i2c_desc *i2c_header;
struct ti_i2c_image_header *img_header;
struct ti_i2c_firmware_rec *firmware_rec;
- const struct firmware *fw;
- const char *fw_name = "edgeport/down3.bin";
+ struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
/* In order to update the I2C firmware we must change the type 2 record
* to type 0xF2. This will force the UMP to come up in Boot Mode.
@@ -782,24 +818,11 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
// Set entire image of 0xffs
memset(buffer, 0xff, buffer_size);
- err = request_firmware(&fw, fw_name, dev);
- if (err) {
- dev_err(dev, "Failed to load image \"%s\" err %d\n",
- fw_name, err);
- kfree(buffer);
- return err;
- }
-
- /* Save Download Version Number */
- OperationalMajorVersion = fw->data[0];
- OperationalMinorVersion = fw->data[1];
- OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
-
/* Copy version number into firmware record */
firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
- firmware_rec->Ver_Major = OperationalMajorVersion;
- firmware_rec->Ver_Minor = OperationalMinorVersion;
+ firmware_rec->Ver_Major = fw_hdr->major_version;
+ firmware_rec->Ver_Minor = fw_hdr->minor_version;
/* Pointer to fw_down memory image */
img_header = (struct ti_i2c_image_header *)&fw->data[4];
@@ -808,8 +831,6 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
&fw->data[4 + sizeof(struct ti_i2c_image_header)],
le16_to_cpu(img_header->Length));
- release_firmware(fw);
-
for (i=0; i < buffer_size; i++) {
cs = (__u8)(cs + buffer[i]);
}
@@ -823,8 +844,8 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
i2c_header->Size = cpu_to_le16(buffer_size);
i2c_header->CheckSum = cs;
- firmware_rec->Ver_Major = OperationalMajorVersion;
- firmware_rec->Ver_Minor = OperationalMinorVersion;
+ firmware_rec->Ver_Major = fw_hdr->major_version;
+ firmware_rec->Ver_Minor = fw_hdr->minor_version;
return 0;
}
@@ -925,13 +946,49 @@ static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
}
+static int check_fw_sanity(struct edgeport_serial *serial,
+ const struct firmware *fw)
+{
+ u16 length_total;
+ u8 checksum = 0;
+ int pos;
+ struct device *dev = &serial->serial->interface->dev;
+ struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+
+ if (fw->size < sizeof(struct edgeport_fw_hdr)) {
+ dev_err(dev, "incomplete fw header\n");
+ return -EINVAL;
+ }
+
+ length_total = le16_to_cpu(fw_hdr->length) +
+ sizeof(struct edgeport_fw_hdr);
+
+ if (fw->size != length_total) {
+ dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
+ length_total, fw->size);
+ return -EINVAL;
+ }
+
+ for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
+ checksum += fw->data[pos];
+
+ if (checksum != fw_hdr->checksum) {
+ dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
+ fw_hdr->checksum, checksum);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
/**
* DownloadTIFirmware - Download run-time operating firmware to the TI5052
*
* This routine downloads the main operating code into the TI5052, using the
* boot code already burned into E2PROM or ROM.
*/
-static int download_fw(struct edgeport_serial *serial)
+static int download_fw(struct edgeport_serial *serial,
+ const struct firmware *fw)
{
struct device *dev = &serial->serial->dev->dev;
int status = 0;
@@ -940,6 +997,14 @@ static int download_fw(struct edgeport_serial *serial)
struct usb_interface_descriptor *interface;
int download_cur_ver;
int download_new_ver;
+ struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
+
+ if (check_fw_sanity(serial, fw))
+ return -EINVAL;
+
+ /* If on-board version is newer, "fw_version" will be updated below. */
+ serial->fw_version = (fw_hdr->major_version << 8) +
+ fw_hdr->minor_version;
/* This routine is entered by both the BOOT mode and the Download mode
* We can determine which code is running by the reading the config
@@ -1047,14 +1112,13 @@ static int download_fw(struct edgeport_serial *serial)
version in I2c */
download_cur_ver = (firmware_version->Ver_Major << 8) +
(firmware_version->Ver_Minor);
- download_new_ver = (OperationalMajorVersion << 8) +
- (OperationalMinorVersion);
+ download_new_ver = (fw_hdr->major_version << 8) +
+ (fw_hdr->minor_version);
dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n",
__func__, firmware_version->Ver_Major,
firmware_version->Ver_Minor,
- OperationalMajorVersion,
- OperationalMinorVersion);
+ fw_hdr->major_version, fw_hdr->minor_version);
/* Check if we have an old version in the I2C and
update if necessary */
@@ -1063,8 +1127,8 @@ static int download_fw(struct edgeport_serial *serial)
__func__,
firmware_version->Ver_Major,
firmware_version->Ver_Minor,
- OperationalMajorVersion,
- OperationalMinorVersion);
+ fw_hdr->major_version,
+ fw_hdr->minor_version);
record = kmalloc(1, GFP_KERNEL);
if (!record) {
@@ -1129,7 +1193,8 @@ static int download_fw(struct edgeport_serial *serial)
/* Reset UMP -- Back to BOOT MODE */
status = ti_vsend_sync(serial->serial->dev,
UMPC_HARDWARE_RESET,
- 0, 0, NULL, 0);
+ 0, 0, NULL, 0,
+ TI_VSEND_TIMEOUT_DEFAULT);
dev_dbg(dev, "%s - HARDWARE RESET return %d\n", __func__, status);
@@ -1139,6 +1204,9 @@ static int download_fw(struct edgeport_serial *serial)
kfree(rom_desc);
kfree(ti_manuf_desc);
return -ENODEV;
+ } else {
+ /* Same or newer fw version is already loaded */
+ serial->fw_version = download_cur_ver;
}
kfree(firmware_version);
}
@@ -1177,7 +1245,7 @@ static int download_fw(struct edgeport_serial *serial)
* UMP Ram to I2C and the firmware will update the
* record type from 0xf2 to 0x02.
*/
- status = build_i2c_fw_hdr(header, dev);
+ status = build_i2c_fw_hdr(header, dev, fw);
if (status) {
kfree(vheader);
kfree(header);
@@ -1229,7 +1297,9 @@ static int download_fw(struct edgeport_serial *serial)
/* Tell firmware to copy download image into I2C */
status = ti_vsend_sync(serial->serial->dev,
- UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
+ UMPC_COPY_DNLD_TO_I2C,
+ 0, 0, NULL, 0,
+ TI_VSEND_TIMEOUT_FW_DOWNLOAD);
dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, status);
if (status) {
@@ -1278,9 +1348,6 @@ static int download_fw(struct edgeport_serial *serial)
__u8 cs = 0;
__u8 *buffer;
int buffer_size;
- int err;
- const struct firmware *fw;
- const char *fw_name = "edgeport/down3.bin";
/* Validate Hardware version number
* Read Manufacturing Descriptor from TI Based Edgeport
@@ -1328,16 +1395,7 @@ static int download_fw(struct edgeport_serial *serial)
/* Initialize the buffer to 0xff (pad the buffer) */
memset(buffer, 0xff, buffer_size);
-
- err = request_firmware(&fw, fw_name, dev);
- if (err) {
- dev_err(dev, "Failed to load image \"%s\" err %d\n",
- fw_name, err);
- kfree(buffer);
- return err;
- }
memcpy(buffer, &fw->data[4], fw->size - 4);
- release_firmware(fw);
for (i = sizeof(struct ti_i2c_image_header);
i < buffer_size; i++) {
@@ -1352,7 +1410,9 @@ static int download_fw(struct edgeport_serial *serial)
header->CheckSum = cs;
/* Download the operational code */
- dev_dbg(dev, "%s - Downloading operational code image (TI UMP)\n", __func__);
+ dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
+ __func__,
+ fw_hdr->major_version, fw_hdr->minor_version);
status = download_code(serial, buffer, buffer_size);
kfree(buffer);
@@ -2373,10 +2433,44 @@ static void edge_break(struct tty_struct *tty, int break_state)
__func__, status);
}
+static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
+{
+ if (!edge_serial->use_heartbeat)
+ return;
+
+ schedule_delayed_work(&edge_serial->heartbeat_work,
+ FW_HEARTBEAT_SECS * HZ);
+}
+
+static void edge_heartbeat_work(struct work_struct *work)
+{
+ struct edgeport_serial *serial;
+ struct ti_i2c_desc *rom_desc;
+
+ serial = container_of(work, struct edgeport_serial,
+ heartbeat_work.work);
+
+ rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
+
+ /* Descriptor address request is enough to reset the firmware timer */
+ if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
+ rom_desc)) {
+ dev_err(&serial->serial->interface->dev,
+ "%s - Incomplete heartbeat\n", __func__);
+ }
+ kfree(rom_desc);
+
+ edge_heartbeat_schedule(serial);
+}
+
static int edge_startup(struct usb_serial *serial)
{
struct edgeport_serial *edge_serial;
int status;
+ const struct firmware *fw;
+ const char *fw_name = "edgeport/down3.bin";
+ struct device *dev = &serial->interface->dev;
+ u16 product_id;
/* create our private serial structure */
edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
@@ -2387,12 +2481,35 @@ static int edge_startup(struct usb_serial *serial)
edge_serial->serial = serial;
usb_set_serial_data(serial, edge_serial);
- status = download_fw(edge_serial);
+ status = request_firmware(&fw, fw_name, dev);
if (status) {
+ dev_err(dev, "Failed to load image \"%s\" err %d\n",
+ fw_name, status);
kfree(edge_serial);
return status;
}
+ status = download_fw(edge_serial, fw);
+ release_firmware(fw);
+ if (status) {
+ kfree(edge_serial);
+ return status;
+ }
+
+ product_id = le16_to_cpu(
+ edge_serial->serial->dev->descriptor.idProduct);
+
+ /* Currently only the EP/416 models require heartbeat support */
+ if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
+ if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
+ product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
+ edge_serial->use_heartbeat = true;
+ }
+ }
+
+ INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
+ edge_heartbeat_schedule(edge_serial);
+
return 0;
}
@@ -2402,7 +2519,10 @@ static void edge_disconnect(struct usb_serial *serial)
static void edge_release(struct usb_serial *serial)
{
- kfree(usb_get_serial_data(serial));
+ struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+ cancel_delayed_work_sync(&edge_serial->heartbeat_work);
+ kfree(edge_serial);
}
static int edge_port_probe(struct usb_serial_port *port)
@@ -2506,6 +2626,25 @@ static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
return 0;
}
+#ifdef CONFIG_PM
+static int edge_suspend(struct usb_serial *serial, pm_message_t message)
+{
+ struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+ cancel_delayed_work_sync(&edge_serial->heartbeat_work);
+
+ return 0;
+}
+
+static int edge_resume(struct usb_serial *serial)
+{
+ struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
+
+ edge_heartbeat_schedule(edge_serial);
+
+ return 0;
+}
+#endif
static struct usb_serial_driver edgeport_1port_device = {
.driver = {
@@ -2538,6 +2677,10 @@ static struct usb_serial_driver edgeport_1port_device = {
.read_int_callback = edge_interrupt_callback,
.read_bulk_callback = edge_bulk_in_callback,
.write_bulk_callback = edge_bulk_out_callback,
+#ifdef CONFIG_PM
+ .suspend = edge_suspend,
+ .resume = edge_resume,
+#endif
};
static struct usb_serial_driver edgeport_2port_device = {
@@ -2571,6 +2714,10 @@ static struct usb_serial_driver edgeport_2port_device = {
.read_int_callback = edge_interrupt_callback,
.read_bulk_callback = edge_bulk_in_callback,
.write_bulk_callback = edge_bulk_out_callback,
+#ifdef CONFIG_PM
+ .suspend = edge_suspend,
+ .resume = edge_resume,
+#endif
};
static struct usb_serial_driver * const serial_drivers[] = {
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