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Date: Thu, 11 Jan 2018 14:47:18 +0800
From: "Ji-Ze Hong (Peter Hong)" <hpeter@...il.com>
To: johan@...nel.org
Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, peter_hong@...tek.com.tw,
"Ji-Ze Hong (Peter Hong)" <hpeter+linux_kernel@...il.com>
Subject: [PATCH V3 4/6] usb: serial: f81534: refactoring calc_num_ports()
In the original code, We'll read configuration in calc_num_ports()
and read again in attach(). In fact, we can move all content from
attach() to calc_num_ports() to simplify the code.
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@...il.com>
---
V3:
1: First introduced in this series patches.
drivers/usb/serial/f81534.c | 116 ++++++++++++--------------------------------
1 file changed, 31 insertions(+), 85 deletions(-)
diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c
index e7dd01310f20..bc0a4bd5dcec 100644
--- a/drivers/usb/serial/f81534.c
+++ b/drivers/usb/serial/f81534.c
@@ -753,14 +753,14 @@ static int f81534_find_config_idx(struct usb_serial *serial, u8 *index)
static int f81534_calc_num_ports(struct usb_serial *serial,
struct usb_serial_endpoints *epds)
{
+ struct f81534_serial_private *serial_priv;
struct device *dev = &serial->interface->dev;
int size_bulk_in = usb_endpoint_maxp(epds->bulk_in[0]);
int size_bulk_out = usb_endpoint_maxp(epds->bulk_out[0]);
- u8 setting[F81534_CUSTOM_DATA_SIZE];
- u8 setting_idx;
u8 num_port = 0;
+ int index = 0;
int status;
- size_t i;
+ int i;
if (size_bulk_out != F81534_WRITE_BUFFER_SIZE ||
size_bulk_in != F81534_MAX_RECEIVE_BLOCK_SIZE) {
@@ -768,8 +768,16 @@ static int f81534_calc_num_ports(struct usb_serial *serial,
return -ENODEV;
}
+ serial_priv = devm_kzalloc(&serial->interface->dev,
+ sizeof(*serial_priv), GFP_KERNEL);
+ if (!serial_priv)
+ return -ENOMEM;
+
+ usb_set_serial_data(serial, serial_priv);
+ mutex_init(&serial_priv->urb_mutex);
+
/* Check had custom setting */
- status = f81534_find_config_idx(serial, &setting_idx);
+ status = f81534_find_config_idx(serial, &serial_priv->setting_idx);
if (status) {
dev_err(&serial->interface->dev, "%s: find idx failed: %d\n",
__func__, status);
@@ -780,11 +788,12 @@ static int f81534_calc_num_ports(struct usb_serial *serial,
* We'll read custom data only when data available, otherwise we'll
* read default value instead.
*/
- if (setting_idx != F81534_CUSTOM_NO_CUSTOM_DATA) {
+ if (serial_priv->setting_idx != F81534_CUSTOM_NO_CUSTOM_DATA) {
status = f81534_read_flash(serial,
F81534_CUSTOM_ADDRESS_START +
F81534_CONF_OFFSET,
- sizeof(setting), setting);
+ sizeof(serial_priv->conf_data),
+ serial_priv->conf_data);
if (status) {
dev_err(&serial->interface->dev,
"%s: get custom data failed: %d\n",
@@ -794,13 +803,13 @@ static int f81534_calc_num_ports(struct usb_serial *serial,
dev_dbg(&serial->interface->dev,
"%s: read config from block: %d\n", __func__,
- setting_idx);
+ serial_priv->setting_idx);
} else {
/* Read default board setting */
status = f81534_read_flash(serial,
- F81534_DEF_CONF_ADDRESS_START, F81534_NUM_PORT,
- setting);
-
+ F81534_DEF_CONF_ADDRESS_START,
+ sizeof(serial_priv->conf_data),
+ serial_priv->conf_data);
if (status) {
dev_err(&serial->interface->dev,
"%s: read failed: %d\n", __func__,
@@ -814,7 +823,7 @@ static int f81534_calc_num_ports(struct usb_serial *serial,
/* New style, find all possible ports */
for (i = 0; i < F81534_NUM_PORT; ++i) {
- if (setting[i] & F81534_PORT_UNAVAILABLE)
+ if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE)
continue;
++num_port;
@@ -826,6 +835,17 @@ static int f81534_calc_num_ports(struct usb_serial *serial,
num_port = 4; /* Nothing found, oldest version IC */
}
+ /* Assign phy-to-logic mapping */
+ for (i = 0; i < F81534_NUM_PORT; ++i) {
+ if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE)
+ continue;
+
+ serial_priv->tty_idx[i] = index++;
+ dev_dbg(&serial->interface->dev,
+ "%s: phy_num: %d, tty_idx: %d\n", __func__, i,
+ serial_priv->tty_idx[i]);
+ }
+
/*
* Setup bulk-out endpoint multiplexing. All ports share the same
* bulk-out endpoint.
@@ -1227,79 +1247,6 @@ static void f81534_write_usb_callback(struct urb *urb)
}
}
-static int f81534_attach(struct usb_serial *serial)
-{
- struct f81534_serial_private *serial_priv;
- int index = 0;
- int status;
- int i;
-
- serial_priv = devm_kzalloc(&serial->interface->dev,
- sizeof(*serial_priv), GFP_KERNEL);
- if (!serial_priv)
- return -ENOMEM;
-
- usb_set_serial_data(serial, serial_priv);
-
- mutex_init(&serial_priv->urb_mutex);
-
- /* Check had custom setting */
- status = f81534_find_config_idx(serial, &serial_priv->setting_idx);
- if (status) {
- dev_err(&serial->interface->dev, "%s: find idx failed: %d\n",
- __func__, status);
- return status;
- }
-
- /*
- * We'll read custom data only when data available, otherwise we'll
- * read default value instead.
- */
- if (serial_priv->setting_idx == F81534_CUSTOM_NO_CUSTOM_DATA) {
- /*
- * The default configuration layout:
- * byte 0/1/2/3: uart setting
- */
- status = f81534_read_flash(serial,
- F81534_DEF_CONF_ADDRESS_START,
- F81534_DEF_CONF_SIZE,
- serial_priv->conf_data);
- if (status) {
- dev_err(&serial->interface->dev,
- "%s: read reserve data failed: %d\n",
- __func__, status);
- return status;
- }
- } else {
- /* Only read 8 bytes for mode & GPIO */
- status = f81534_read_flash(serial,
- F81534_CUSTOM_ADDRESS_START +
- F81534_CONF_OFFSET,
- sizeof(serial_priv->conf_data),
- serial_priv->conf_data);
- if (status) {
- dev_err(&serial->interface->dev,
- "%s: idx: %d get data failed: %d\n",
- __func__, serial_priv->setting_idx,
- status);
- return status;
- }
- }
-
- /* Assign phy-to-logic mapping */
- for (i = 0; i < F81534_NUM_PORT; ++i) {
- if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE)
- continue;
-
- serial_priv->tty_idx[i] = index++;
- dev_dbg(&serial->interface->dev,
- "%s: phy_num: %d, tty_idx: %d\n", __func__, i,
- serial_priv->tty_idx[i]);
- }
-
- return 0;
-}
-
static void f81534_lsr_worker(struct work_struct *work)
{
struct f81534_port_private *port_priv;
@@ -1543,7 +1490,6 @@ static struct usb_serial_driver f81534_device = {
.write = f81534_write,
.tx_empty = f81534_tx_empty,
.calc_num_ports = f81534_calc_num_ports,
- .attach = f81534_attach,
.port_probe = f81534_port_probe,
.port_remove = f81534_port_remove,
.break_ctl = f81534_break_ctl,
--
2.7.4
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