aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/sb105x/sb_ser_core.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/staging/sb105x/sb_ser_core.h')
-rw-r--r--drivers/staging/sb105x/sb_ser_core.h368
1 files changed, 368 insertions, 0 deletions
diff --git a/drivers/staging/sb105x/sb_ser_core.h b/drivers/staging/sb105x/sb_ser_core.h
new file mode 100644
index 000000000000..c8fb99173299
--- /dev/null
+++ b/drivers/staging/sb105x/sb_ser_core.h
@@ -0,0 +1,368 @@
+#include <linux/wait.h>
+
+#define UART_CONFIG_TYPE (1 << 0)
+#define UART_CONFIG_IRQ (1 << 1)
+#define UPIO_PORT (0)
+#define UPIO_HUB6 (1)
+#define UPIO_MEM (2)
+#define UPIO_MEM32 (3)
+#define UPIO_AU (4) /* Au1x00 type IO */
+#define UPIO_TSI (5) /* Tsi108/109 type IO */
+#define UPF_FOURPORT (1 << 1)
+#define UPF_SAK (1 << 2)
+#define UPF_SPD_MASK (0x1030)
+#define UPF_SPD_HI (0x0010)
+#define UPF_SPD_VHI (0x0020)
+#define UPF_SPD_CUST (0x0030)
+#define UPF_SPD_SHI (0x1000)
+#define UPF_SPD_WARP (0x1010)
+#define UPF_SKIP_TEST (1 << 6)
+#define UPF_AUTO_IRQ (1 << 7)
+#define UPF_HARDPPS_CD (1 << 11)
+#define UPF_LOW_LATENCY (1 << 13)
+#define UPF_BUGGY_UART (1 << 14)
+#define UPF_MAGIC_MULTIPLIER (1 << 16)
+#define UPF_CONS_FLOW (1 << 23)
+#define UPF_SHARE_IRQ (1 << 24)
+#define UPF_BOOT_AUTOCONF (1 << 28)
+#define UPF_DEAD (1 << 30)
+#define UPF_IOREMAP (1 << 31)
+#define UPF_CHANGE_MASK (0x17fff)
+#define UPF_USR_MASK (UPF_SPD_MASK|UPF_LOW_LATENCY)
+#define USF_CLOSING_WAIT_INF (0)
+#define USF_CLOSING_WAIT_NONE (~0U)
+
+#define UART_XMIT_SIZE PAGE_SIZE
+
+#define UIF_CHECK_CD (1 << 25)
+#define UIF_CTS_FLOW (1 << 26)
+#define UIF_NORMAL_ACTIVE (1 << 29)
+#define UIF_INITIALIZED (1 << 31)
+#define UIF_SUSPENDED (1 << 30)
+
+#define WAKEUP_CHARS 256
+
+#define uart_circ_empty(circ) ((circ)->head == (circ)->tail)
+#define uart_circ_clear(circ) ((circ)->head = (circ)->tail = 0)
+
+#define uart_circ_chars_pending(circ) \
+ (CIRC_CNT((circ)->head, (circ)->tail, UART_XMIT_SIZE))
+
+#define uart_circ_chars_free(circ) \
+ (CIRC_SPACE((circ)->head, (circ)->tail, UART_XMIT_SIZE))
+
+#define uart_tx_stopped(port) \
+ ((port)->info->tty->stopped || (port)->info->tty->hw_stopped)
+
+#define UART_ENABLE_MS(port,cflag) ((port)->flags & UPF_HARDPPS_CD || \
+ (cflag) & CRTSCTS || \
+ !((cflag) & CLOCAL))
+
+
+struct sb_uart_port;
+struct sb_uart_info;
+struct serial_struct;
+struct device;
+
+struct sb_uart_ops {
+ unsigned int (*tx_empty)(struct sb_uart_port *);
+ void (*set_mctrl)(struct sb_uart_port *, unsigned int mctrl);
+ unsigned int (*get_mctrl)(struct sb_uart_port *);
+ void (*stop_tx)(struct sb_uart_port *);
+ void (*start_tx)(struct sb_uart_port *);
+ void (*send_xchar)(struct sb_uart_port *, char ch);
+ void (*stop_rx)(struct sb_uart_port *);
+ void (*enable_ms)(struct sb_uart_port *);
+ void (*break_ctl)(struct sb_uart_port *, int ctl);
+ int (*startup)(struct sb_uart_port *);
+ void (*shutdown)(struct sb_uart_port *);
+ void (*set_termios)(struct sb_uart_port *, struct MP_TERMIOS *new,
+ struct MP_TERMIOS *old);
+ void (*pm)(struct sb_uart_port *, unsigned int state,
+ unsigned int oldstate);
+ int (*set_wake)(struct sb_uart_port *, unsigned int state);
+
+ const char *(*type)(struct sb_uart_port *);
+
+ void (*release_port)(struct sb_uart_port *);
+
+ int (*request_port)(struct sb_uart_port *);
+ void (*config_port)(struct sb_uart_port *, int);
+ int (*verify_port)(struct sb_uart_port *, struct serial_struct *);
+ int (*ioctl)(struct sb_uart_port *, unsigned int, unsigned long);
+};
+
+
+struct sb_uart_icount {
+ __u32 cts;
+ __u32 dsr;
+ __u32 rng;
+ __u32 dcd;
+ __u32 rx;
+ __u32 tx;
+ __u32 frame;
+ __u32 overrun;
+ __u32 parity;
+ __u32 brk;
+ __u32 buf_overrun;
+};
+typedef unsigned int upf_t;
+
+struct sb_uart_port {
+ spinlock_t lock; /* port lock */
+ unsigned int iobase; /* in/out[bwl] */
+ unsigned char __iomem *membase; /* read/write[bwl] */
+ unsigned int irq; /* irq number */
+ unsigned int uartclk; /* base uart clock */
+ unsigned int fifosize; /* tx fifo size */
+ unsigned char x_char; /* xon/xoff char */
+ unsigned char regshift; /* reg offset shift */
+ unsigned char iotype; /* io access style */
+ unsigned char unused1;
+
+
+ unsigned int read_status_mask; /* driver specific */
+ unsigned int ignore_status_mask; /* driver specific */
+ struct sb_uart_info *info; /* pointer to parent info */
+ struct sb_uart_icount icount; /* statistics */
+
+ struct console *cons; /* struct console, if any */
+#ifdef CONFIG_SERIAL_CORE_CONSOLE
+ unsigned long sysrq; /* sysrq timeout */
+#endif
+
+ upf_t flags;
+
+ unsigned int mctrl; /* current modem ctrl settings */
+ unsigned int timeout; /* character-based timeout */
+ unsigned int type; /* port type */
+ const struct sb_uart_ops *ops;
+ unsigned int custom_divisor;
+ unsigned int line; /* port index */
+ unsigned long mapbase; /* for ioremap */
+ struct device *dev; /* parent device */
+ unsigned char hub6; /* this should be in the 8250 driver */
+ unsigned char unused[3];
+};
+
+#define mdmode unused[2]
+#define MDMODE_ADDR 0x1
+#define MDMODE_ENABLE 0x2
+#define MDMODE_AUTO 0x4
+#define MDMODE_ADDRSEND 0x8
+
+struct sb_uart_state {
+ unsigned int close_delay; /* msec */
+ unsigned int closing_wait; /* msec */
+
+
+ int count;
+ int pm_state;
+ struct sb_uart_info *info;
+ struct sb_uart_port *port;
+
+ struct mutex mutex;
+};
+
+typedef unsigned int uif_t;
+
+struct sb_uart_info {
+ struct tty_struct *tty;
+ struct circ_buf xmit;
+ uif_t flags;
+
+ int blocked_open;
+
+ struct tasklet_struct tlet;
+
+ wait_queue_head_t open_wait;
+ wait_queue_head_t delta_msr_wait;
+};
+
+
+struct module;
+struct tty_driver;
+
+struct uart_driver {
+ struct module *owner;
+ const char *driver_name;
+ const char *dev_name;
+ int major;
+ int minor;
+ int nr;
+ struct console *cons;
+
+ struct sb_uart_state *state;
+ struct tty_driver *tty_driver;
+};
+
+void sb_uart_write_wakeup(struct sb_uart_port *port)
+{
+ struct sb_uart_info *info = port->info;
+ tasklet_schedule(&info->tlet);
+}
+
+void sb_uart_update_timeout(struct sb_uart_port *port, unsigned int cflag,
+ unsigned int baud)
+{
+ unsigned int bits;
+
+ switch (cflag & CSIZE)
+ {
+ case CS5:
+ bits = 7;
+ break;
+
+ case CS6:
+ bits = 8;
+ break;
+
+ case CS7:
+ bits = 9;
+ break;
+
+ default:
+ bits = 10;
+ break;
+ }
+
+ if (cflag & CSTOPB)
+ {
+ bits++;
+ }
+
+ if (cflag & PARENB)
+ {
+ bits++;
+ }
+
+ bits = bits * port->fifosize;
+
+ port->timeout = (HZ * bits) / baud + HZ/50;
+}
+unsigned int sb_uart_get_baud_rate(struct sb_uart_port *port, struct MP_TERMIOS *termios,
+ struct MP_TERMIOS *old, unsigned int min,
+ unsigned int max)
+{
+ unsigned int try, baud, altbaud = 38400;
+ upf_t flags = port->flags & UPF_SPD_MASK;
+
+ if (flags == UPF_SPD_HI)
+ altbaud = 57600;
+ if (flags == UPF_SPD_VHI)
+ altbaud = 115200;
+ if (flags == UPF_SPD_SHI)
+ altbaud = 230400;
+ if (flags == UPF_SPD_WARP)
+ altbaud = 460800;
+
+ for (try = 0; try < 2; try++) {
+
+ switch (termios->c_cflag & (CBAUD | CBAUDEX))
+ {
+ case B921600 : baud = 921600; break;
+ case B460800 : baud = 460800; break;
+ case B230400 : baud = 230400; break;
+ case B115200 : baud = 115200; break;
+ case B57600 : baud = 57600; break;
+ case B38400 : baud = 38400; break;
+ case B19200 : baud = 19200; break;
+ case B9600 : baud = 9600; break;
+ case B4800 : baud = 4800; break;
+ case B2400 : baud = 2400; break;
+ case B1800 : baud = 1800; break;
+ case B1200 : baud = 1200; break;
+ case B600 : baud = 600; break;
+ case B300 : baud = 300; break;
+ case B200 : baud = 200; break;
+ case B150 : baud = 150; break;
+ case B134 : baud = 134; break;
+ case B110 : baud = 110; break;
+ case B75 : baud = 75; break;
+ case B50 : baud = 50; break;
+ default : baud = 9600; break;
+ }
+
+ if (baud == 38400)
+ baud = altbaud;
+
+ if (baud == 0)
+ baud = 9600;
+
+ if (baud >= min && baud <= max)
+ return baud;
+
+ termios->c_cflag &= ~CBAUD;
+ if (old) {
+ termios->c_cflag |= old->c_cflag & CBAUD;
+ old = NULL;
+ continue;
+ }
+
+ termios->c_cflag |= B9600;
+ }
+
+ return 0;
+}
+unsigned int sb_uart_get_divisor(struct sb_uart_port *port, unsigned int baud)
+{
+ unsigned int quot;
+
+ if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST)
+ quot = port->custom_divisor;
+ else
+ quot = (port->uartclk + (8 * baud)) / (16 * baud);
+
+ return quot;
+}
+
+
+
+static inline int sb_uart_handle_break(struct sb_uart_port *port)
+{
+ struct sb_uart_info *info = port->info;
+
+ if (port->flags & UPF_SAK)
+ do_SAK(info->tty);
+ return 0;
+}
+
+static inline void sb_uart_handle_dcd_change(struct sb_uart_port *port, unsigned int status)
+{
+ struct sb_uart_info *info = port->info;
+
+ port->icount.dcd++;
+
+ if (info->flags & UIF_CHECK_CD) {
+ if (status)
+ wake_up_interruptible(&info->open_wait);
+ else if (info->tty)
+ tty_hangup(info->tty);
+ }
+}
+
+static inline void sb_uart_handle_cts_change(struct sb_uart_port *port, unsigned int status)
+{
+ struct sb_uart_info *info = port->info;
+ struct tty_struct *tty = info->tty;
+
+ port->icount.cts++;
+
+ if (info->flags & UIF_CTS_FLOW) {
+ if (tty->hw_stopped) {
+ if (status) {
+ tty->hw_stopped = 0;
+ port->ops->start_tx(port);
+ sb_uart_write_wakeup(port);
+ }
+ } else {
+ if (!status) {
+ tty->hw_stopped = 1;
+ port->ops->stop_tx(port);
+ }
+ }
+ }
+}
+
+
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.