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-rw-r--r--drivers/usb/serial/f81534.c93
1 files changed, 77 insertions, 16 deletions
diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c
index e4573b4c8935..cfba05489bfa 100644
--- a/drivers/usb/serial/f81534.c
+++ b/drivers/usb/serial/f81534.c
@@ -41,6 +41,7 @@
#define F81534_MODEM_CONTROL_REG (0x04 + F81534_UART_BASE_ADDRESS)
#define F81534_LINE_STATUS_REG (0x05 + F81534_UART_BASE_ADDRESS)
#define F81534_MODEM_STATUS_REG (0x06 + F81534_UART_BASE_ADDRESS)
+#define F81534_CLOCK_REG (0x08 + F81534_UART_BASE_ADDRESS)
#define F81534_CONFIG1_REG (0x09 + F81534_UART_BASE_ADDRESS)
#define F81534_DEF_CONF_ADDRESS_START 0x3000
@@ -57,7 +58,7 @@
/* Default URB timeout for USB operations */
#define F81534_USB_MAX_RETRY 10
-#define F81534_USB_TIMEOUT 1000
+#define F81534_USB_TIMEOUT 2000
#define F81534_SET_GET_REGISTER 0xA0
#define F81534_NUM_PORT 4
@@ -96,7 +97,6 @@
#define F81534_CMD_READ 0x03
#define F81534_DEFAULT_BAUD_RATE 9600
-#define F81534_MAX_BAUDRATE 115200
#define F81534_PORT_CONF_DISABLE_PORT BIT(3)
#define F81534_PORT_CONF_NOT_EXIST_PORT BIT(7)
@@ -106,6 +106,24 @@
#define F81534_1X_RXTRIGGER 0xc3
#define F81534_8X_RXTRIGGER 0xcf
+/*
+ * F81532/534 Clock registers (offset +08h)
+ *
+ * Bit0: UART Enable (always on)
+ * Bit2-1: Clock source selector
+ * 00: 1.846MHz.
+ * 01: 18.46MHz.
+ * 10: 24MHz.
+ * 11: 14.77MHz.
+ */
+
+#define F81534_UART_EN BIT(0)
+#define F81534_CLK_1_846_MHZ 0
+#define F81534_CLK_18_46_MHZ BIT(1)
+#define F81534_CLK_24_MHZ BIT(2)
+#define F81534_CLK_14_77_MHZ (BIT(1) | BIT(2))
+#define F81534_CLK_MASK GENMASK(2, 1)
+
static const struct usb_device_id f81534_id_table[] = {
{ USB_DEVICE(FINTEK_VENDOR_ID_1, FINTEK_DEVICE_ID) },
{ USB_DEVICE(FINTEK_VENDOR_ID_2, FINTEK_DEVICE_ID) },
@@ -129,12 +147,18 @@ struct f81534_port_private {
struct usb_serial_port *port;
unsigned long tx_empty;
spinlock_t msr_lock;
+ u32 baud_base;
u8 shadow_mcr;
u8 shadow_lcr;
u8 shadow_msr;
+ u8 shadow_clk;
u8 phy_num;
};
+static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 };
+static u8 const clock_table[] = { F81534_CLK_1_846_MHZ, F81534_CLK_14_77_MHZ,
+ F81534_CLK_18_46_MHZ, F81534_CLK_24_MHZ };
+
static int f81534_logic_to_phy_port(struct usb_serial *serial,
struct usb_serial_port *port)
{
@@ -460,13 +484,52 @@ static u32 f81534_calc_baud_divisor(u32 baudrate, u32 clockrate)
return DIV_ROUND_CLOSEST(clockrate, baudrate);
}
-static int f81534_set_port_config(struct usb_serial_port *port, u32 baudrate,
- u8 lcr)
+static int f81534_find_clk(u32 baudrate)
+{
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) {
+ if (baudrate <= baudrate_table[idx] &&
+ baudrate_table[idx] % baudrate == 0)
+ return idx;
+ }
+
+ return -EINVAL;
+}
+
+static int f81534_set_port_config(struct usb_serial_port *port,
+ struct tty_struct *tty, u32 baudrate, u32 old_baudrate, u8 lcr)
{
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
u32 divisor;
int status;
+ int i;
+ int idx;
u8 value;
+ u32 baud_list[] = {baudrate, old_baudrate, F81534_DEFAULT_BAUD_RATE};
+
+ for (i = 0; i < ARRAY_SIZE(baud_list); ++i) {
+ idx = f81534_find_clk(baud_list[i]);
+ if (idx >= 0) {
+ baudrate = baud_list[i];
+ tty_encode_baud_rate(tty, baudrate, baudrate);
+ break;
+ }
+ }
+
+ if (idx < 0)
+ return -EINVAL;
+
+ port_priv->baud_base = baudrate_table[idx];
+ port_priv->shadow_clk &= ~F81534_CLK_MASK;
+ port_priv->shadow_clk |= clock_table[idx];
+
+ status = f81534_set_port_register(port, F81534_CLOCK_REG,
+ port_priv->shadow_clk);
+ if (status) {
+ dev_err(&port->dev, "CLOCK_REG setting failed\n");
+ return status;
+ }
if (baudrate <= 1200)
value = F81534_1X_RXTRIGGER; /* 128 FIFO & TL: 1x */
@@ -482,7 +545,7 @@ static int f81534_set_port_config(struct usb_serial_port *port, u32 baudrate,
if (baudrate <= 1200)
value = UART_FCR_TRIGGER_1 | UART_FCR_ENABLE_FIFO; /* TL: 1 */
else
- value = UART_FCR_R_TRIG_11 | UART_FCR_ENABLE_FIFO; /* TL: 14 */
+ value = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO; /* TL: 8 */
status = f81534_set_port_register(port, F81534_FIFO_CONTROL_REG,
value);
@@ -491,7 +554,7 @@ static int f81534_set_port_config(struct usb_serial_port *port, u32 baudrate,
return status;
}
- divisor = f81534_calc_baud_divisor(baudrate, F81534_MAX_BAUDRATE);
+ divisor = f81534_calc_baud_divisor(baudrate, port_priv->baud_base);
mutex_lock(&port_priv->lcr_mutex);
@@ -741,6 +804,7 @@ static void f81534_set_termios(struct tty_struct *tty,
u8 new_lcr = 0;
int status;
u32 baud;
+ u32 old_baud;
if (C_BAUD(tty) == B0)
f81534_update_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
@@ -780,18 +844,14 @@ static void f81534_set_termios(struct tty_struct *tty,
if (!baud)
return;
- if (baud > F81534_MAX_BAUDRATE) {
- if (old_termios)
- baud = tty_termios_baud_rate(old_termios);
- else
- baud = F81534_DEFAULT_BAUD_RATE;
-
- tty_encode_baud_rate(tty, baud, baud);
- }
+ if (old_termios)
+ old_baud = tty_termios_baud_rate(old_termios);
+ else
+ old_baud = F81534_DEFAULT_BAUD_RATE;
dev_dbg(&port->dev, "%s: baud: %d\n", __func__, baud);
- status = f81534_set_port_config(port, baud, new_lcr);
+ status = f81534_set_port_config(port, tty, baud, old_baud, new_lcr);
if (status < 0) {
dev_err(&port->dev, "%s: set port config failed: %d\n",
__func__, status);
@@ -947,7 +1007,7 @@ static int f81534_get_serial_info(struct usb_serial_port *port,
tmp.type = PORT_16550A;
tmp.port = port->port_number;
tmp.line = port->minor;
- tmp.baud_base = F81534_MAX_BAUDRATE;
+ tmp.baud_base = port_priv->baud_base;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
@@ -1221,6 +1281,7 @@ static int f81534_port_probe(struct usb_serial_port *port)
if (!port_priv)
return -ENOMEM;
+ port_priv->shadow_clk = F81534_UART_EN;
spin_lock_init(&port_priv->msr_lock);
mutex_init(&port_priv->mcr_mutex);
mutex_init(&port_priv->lcr_mutex);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 23:22:41 +0000