[PATCH v2 5/6] USB: serial: ftdi_sio: pass port to quirk port_probe functions

Mychaela N. Falconia
2022-05-31T04:37:26Z

The original code passed only the pointer to the ftdi_private struct
to quirk port_probe functions. However, some quirks may need to be
applied conditionally only to some channels of a multichannel FT2232x
or FT4232H device, and if a given quirk's port_probe function needs
to figure out which channel of a multichannel device is currently
being considered, it needs access to the port pointer passed to the
ftdi_sio_port_probe() function, so it can traverse USB data structures
from there.

Signed-off-by: Mychaela N. Falconia <falcon@freecalypso.org>
---
drivers/usb/serial/ftdi_sio.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 49c08f07c969..6523a36dcc45 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -88,15 +88,15 @@ struct ftdi_private {
struct ftdi_sio_quirk {
int (*probe)(struct usb_serial *);
/* Special settings for probed ports. */
- void (*port_probe)(struct ftdi_private *);
+ void (*port_probe)(struct usb_serial_port *);
};

static int ftdi_jtag_probe(struct usb_serial *serial);
static int ftdi_NDI_device_setup(struct usb_serial *serial);
static int ftdi_stmclite_probe(struct usb_serial *serial);
static int ftdi_8u2232c_probe(struct usb_serial *serial);
-static void ftdi_USB_UIRT_setup(struct ftdi_private *priv);
-static void ftdi_HE_TIRA1_setup(struct ftdi_private *priv);
+static void ftdi_USB_UIRT_setup(struct usb_serial_port *port);
+static void ftdi_HE_TIRA1_setup(struct usb_serial_port *port);

static const struct ftdi_sio_quirk ftdi_jtag_quirk = {
.probe = ftdi_jtag_probe,
@@ -2238,11 +2238,11 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)

mutex_init(&priv->cfg_lock);

- if (quirk && quirk->port_probe)
- quirk->port_probe(priv);
-
usb_set_serial_port_data(port, priv);

+ if (quirk && quirk->port_probe)
+ quirk->port_probe(port);
+
ftdi_determine_type(port);
ftdi_set_max_packet_size(port);
if (read_latency_timer(port) < 0)
@@ -2263,8 +2263,10 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
/* Setup for the USB-UIRT device, which requires hardwired
* baudrate (38400 gets mapped to 312500) */
/* Called from usbserial:serial_probe */
-static void ftdi_USB_UIRT_setup(struct ftdi_private *priv)
+static void ftdi_USB_UIRT_setup(struct usb_serial_port *port)
{
+ struct ftdi_private *priv = usb_get_serial_port_data(port);
+
priv->flags |= ASYNC_SPD_CUST;
priv->custom_divisor = 77;
priv->force_baud = 38400;
@@ -2273,8 +2275,10 @@ static void ftdi_USB_UIRT_setup(struct ftdi_private *priv)
/* Setup for the HE-TIRA1 device, which requires hardwired
* baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */

-static void ftdi_HE_TIRA1_setup(struct ftdi_private *priv)
+static void ftdi_HE_TIRA1_setup(struct usb_serial_port *port)
{
+ struct ftdi_private *priv = usb_get_serial_port_data(port);
+
priv->flags |= ASYNC_SPD_CUST;
priv->custom_divisor = 240;
priv->force_baud = 38400;
--
2.9.0