Lines Matching +full:port +full:- +full:1
1 // SPDX-License-Identifier: GPL-2.0
25 #include <mach/netx-regs.h>
27 /* We've been assigned a range on the "Low-density serial ports" major */
50 #define SR_FE (1<<0)
51 #define SR_PE (1<<1)
52 #define SR_BE (1<<2)
53 #define SR_OE (1<<3)
55 #define LINE_CR_BRK (1<<0)
56 #define LINE_CR_PEN (1<<1)
57 #define LINE_CR_EPS (1<<2)
58 #define LINE_CR_STP2 (1<<3)
59 #define LINE_CR_FEN (1<<4)
61 #define LINE_CR_6BIT (1<<5)
66 #define CR_UART_EN (1<<0)
67 #define CR_SIREN (1<<1)
68 #define CR_SIRLP (1<<2)
69 #define CR_MSIE (1<<3)
70 #define CR_RIE (1<<4)
71 #define CR_TIE (1<<5)
72 #define CR_RTIE (1<<6)
73 #define CR_LBE (1<<7)
75 #define FR_CTS (1<<0)
76 #define FR_DSR (1<<1)
77 #define FR_DCD (1<<2)
78 #define FR_BUSY (1<<3)
79 #define FR_RXFE (1<<4)
80 #define FR_TXFF (1<<5)
81 #define FR_RXFF (1<<6)
82 #define FR_TXFE (1<<7)
84 #define IIR_MIS (1<<0)
85 #define IIR_RIS (1<<1)
86 #define IIR_TIS (1<<2)
87 #define IIR_RTIS (1<<3)
90 #define RTS_CR_AUTO (1<<0)
91 #define RTS_CR_RTS (1<<1)
92 #define RTS_CR_COUNT (1<<2)
93 #define RTS_CR_MOD2 (1<<3)
94 #define RTS_CR_RTS_POL (1<<4)
95 #define RTS_CR_CTS_CTR (1<<5)
96 #define RTS_CR_CTS_POL (1<<6)
97 #define RTS_CR_STICK (1<<7)
100 #define DRIVER_NAME "netx-uart"
103 struct uart_port port; member
106 static void netx_stop_tx(struct uart_port *port) in netx_stop_tx() argument
109 val = readl(port->membase + UART_CR); in netx_stop_tx()
110 writel(val & ~CR_TIE, port->membase + UART_CR); in netx_stop_tx()
113 static void netx_stop_rx(struct uart_port *port) in netx_stop_rx() argument
116 val = readl(port->membase + UART_CR); in netx_stop_rx()
117 writel(val & ~CR_RIE, port->membase + UART_CR); in netx_stop_rx()
120 static void netx_enable_ms(struct uart_port *port) in netx_enable_ms() argument
123 val = readl(port->membase + UART_CR); in netx_enable_ms()
124 writel(val | CR_MSIE, port->membase + UART_CR); in netx_enable_ms()
127 static inline void netx_transmit_buffer(struct uart_port *port) in netx_transmit_buffer() argument
129 struct circ_buf *xmit = &port->state->xmit; in netx_transmit_buffer()
131 if (port->x_char) { in netx_transmit_buffer()
132 writel(port->x_char, port->membase + UART_DR); in netx_transmit_buffer()
133 port->icount.tx++; in netx_transmit_buffer()
134 port->x_char = 0; in netx_transmit_buffer()
138 if (uart_tx_stopped(port) || uart_circ_empty(xmit)) { in netx_transmit_buffer()
139 netx_stop_tx(port); in netx_transmit_buffer()
144 /* send xmit->buf[xmit->tail] in netx_transmit_buffer()
145 * out the port here */ in netx_transmit_buffer()
146 writel(xmit->buf[xmit->tail], port->membase + UART_DR); in netx_transmit_buffer()
147 xmit->tail = (xmit->tail + 1) & in netx_transmit_buffer()
148 (UART_XMIT_SIZE - 1); in netx_transmit_buffer()
149 port->icount.tx++; in netx_transmit_buffer()
152 } while (!(readl(port->membase + UART_FR) & FR_TXFF)); in netx_transmit_buffer()
155 netx_stop_tx(port); in netx_transmit_buffer()
158 static void netx_start_tx(struct uart_port *port) in netx_start_tx() argument
161 readl(port->membase + UART_CR) | CR_TIE, port->membase + UART_CR); in netx_start_tx()
163 if (!(readl(port->membase + UART_FR) & FR_TXFF)) in netx_start_tx()
164 netx_transmit_buffer(port); in netx_start_tx()
167 static unsigned int netx_tx_empty(struct uart_port *port) in netx_tx_empty() argument
169 return readl(port->membase + UART_FR) & FR_BUSY ? 0 : TIOCSER_TEMT; in netx_tx_empty()
172 static void netx_txint(struct uart_port *port) in netx_txint() argument
174 struct circ_buf *xmit = &port->state->xmit; in netx_txint()
176 if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { in netx_txint()
177 netx_stop_tx(port); in netx_txint()
181 netx_transmit_buffer(port); in netx_txint()
184 uart_write_wakeup(port); in netx_txint()
187 static void netx_rxint(struct uart_port *port, unsigned long *flags) in netx_rxint() argument
191 while (!(readl(port->membase + UART_FR) & FR_RXFE)) { in netx_rxint()
192 rx = readl(port->membase + UART_DR); in netx_rxint()
194 port->icount.rx++; in netx_rxint()
195 status = readl(port->membase + UART_SR); in netx_rxint()
197 writel(0, port->membase + UART_SR); in netx_rxint()
198 if (uart_handle_break(port)) in netx_rxint()
205 port->icount.parity++; in netx_rxint()
207 port->icount.frame++; in netx_rxint()
209 port->icount.overrun++; in netx_rxint()
211 status &= port->read_status_mask; in netx_rxint()
221 if (uart_handle_sysrq_char(port, rx)) in netx_rxint()
224 uart_insert_char(port, status, SR_OE, rx, flg); in netx_rxint()
227 spin_unlock_irqrestore(&port->lock, *flags); in netx_rxint()
228 tty_flip_buffer_push(&port->state->port); in netx_rxint()
229 spin_lock_irqsave(&port->lock, *flags); in netx_rxint()
234 struct uart_port *port = dev_id; in netx_int() local
238 spin_lock_irqsave(&port->lock,flags); in netx_int()
240 status = readl(port->membase + UART_IIR) & IIR_MASK; in netx_int()
243 netx_rxint(port, &flags); in netx_int()
245 netx_txint(port); in netx_int()
247 if (readl(port->membase + UART_FR) & FR_CTS) in netx_int()
248 uart_handle_cts_change(port, 1); in netx_int()
250 uart_handle_cts_change(port, 0); in netx_int()
252 writel(0, port->membase + UART_IIR); in netx_int()
253 status = readl(port->membase + UART_IIR) & IIR_MASK; in netx_int()
256 spin_unlock_irqrestore(&port->lock,flags); in netx_int()
260 static unsigned int netx_get_mctrl(struct uart_port *port) in netx_get_mctrl() argument
264 if (readl(port->membase + UART_FR) & FR_CTS) in netx_get_mctrl()
270 static void netx_set_mctrl(struct uart_port *port, unsigned int mctrl) in netx_set_mctrl() argument
276 val = readl(port->membase + UART_RTS_CR); in netx_set_mctrl()
277 writel(val | RTS_CR_RTS, port->membase + UART_RTS_CR); in netx_set_mctrl()
281 static void netx_break_ctl(struct uart_port *port, int break_state) in netx_break_ctl() argument
284 spin_lock_irq(&port->lock); in netx_break_ctl()
286 line_cr = readl(port->membase + UART_LINE_CR); in netx_break_ctl()
291 writel(line_cr, port->membase + UART_LINE_CR); in netx_break_ctl()
293 spin_unlock_irq(&port->lock); in netx_break_ctl()
296 static int netx_startup(struct uart_port *port) in netx_startup() argument
300 ret = request_irq(port->irq, netx_int, 0, in netx_startup()
301 DRIVER_NAME, port); in netx_startup()
303 dev_err(port->dev, "unable to grab irq%d\n",port->irq); in netx_startup()
307 writel(readl(port->membase + UART_LINE_CR) | LINE_CR_FEN, in netx_startup()
308 port->membase + UART_LINE_CR); in netx_startup()
311 port->membase + UART_CR); in netx_startup()
317 static void netx_shutdown(struct uart_port *port) in netx_shutdown() argument
319 writel(0, port->membase + UART_CR) ; in netx_shutdown()
321 free_irq(port->irq, port); in netx_shutdown()
325 netx_set_termios(struct uart_port *port, struct ktermios *termios, in netx_set_termios() argument
333 switch (termios->c_cflag & CSIZE) { in netx_set_termios()
348 if (termios->c_cflag & CSTOPB) in netx_set_termios()
351 if (termios->c_cflag & PARENB) { in netx_set_termios()
353 if (!(termios->c_cflag & PARODD)) in netx_set_termios()
357 if (termios->c_cflag & CRTSCTS) in netx_set_termios()
360 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); in netx_set_termios()
366 spin_lock_irq(&port->lock); in netx_set_termios()
368 uart_update_timeout(port, termios->c_cflag, baud); in netx_set_termios()
370 old_cr = readl(port->membase + UART_CR); in netx_set_termios()
374 port->membase + UART_CR); in netx_set_termios()
377 while (readl(port->membase + UART_FR) & FR_BUSY); in netx_set_termios()
380 writel(old_cr & ~CR_UART_EN, port->membase + UART_CR); in netx_set_termios()
384 if (UART_ENABLE_MS(port, termios->c_cflag)) in netx_set_termios()
387 writel((quot>>8) & 0xff, port->membase + UART_BAUDDIV_MSB); in netx_set_termios()
388 writel(quot & 0xff, port->membase + UART_BAUDDIV_LSB); in netx_set_termios()
389 writel(line_cr, port->membase + UART_LINE_CR); in netx_set_termios()
391 writel(rts_cr, port->membase + UART_RTS_CR); in netx_set_termios()
396 port->ignore_status_mask = 0; in netx_set_termios()
397 if (termios->c_iflag & IGNPAR) in netx_set_termios()
398 port->ignore_status_mask |= SR_PE; in netx_set_termios()
399 if (termios->c_iflag & IGNBRK) { in netx_set_termios()
400 port->ignore_status_mask |= SR_BE; in netx_set_termios()
405 if (termios->c_iflag & IGNPAR) in netx_set_termios()
406 port->ignore_status_mask |= SR_PE; in netx_set_termios()
409 port->read_status_mask = 0; in netx_set_termios()
410 if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK)) in netx_set_termios()
411 port->read_status_mask |= SR_BE; in netx_set_termios()
412 if (termios->c_iflag & INPCK) in netx_set_termios()
413 port->read_status_mask |= SR_PE | SR_FE; in netx_set_termios()
415 writel(old_cr, port->membase + UART_CR); in netx_set_termios()
417 spin_unlock_irq(&port->lock); in netx_set_termios()
420 static const char *netx_type(struct uart_port *port) in netx_type() argument
422 return port->type == PORT_NETX ? "NETX" : NULL; in netx_type()
425 static void netx_release_port(struct uart_port *port) in netx_release_port() argument
427 release_mem_region(port->mapbase, UART_PORT_SIZE); in netx_release_port()
430 static int netx_request_port(struct uart_port *port) in netx_request_port() argument
432 return request_mem_region(port->mapbase, UART_PORT_SIZE, in netx_request_port()
433 DRIVER_NAME) != NULL ? 0 : -EBUSY; in netx_request_port()
436 static void netx_config_port(struct uart_port *port, int flags) in netx_config_port() argument
438 if (flags & UART_CONFIG_TYPE && netx_request_port(port) == 0) in netx_config_port()
439 port->type = PORT_NETX; in netx_config_port()
443 netx_verify_port(struct uart_port *port, struct serial_struct *ser) in netx_verify_port() argument
447 if (ser->type != PORT_UNKNOWN && ser->type != PORT_NETX) in netx_verify_port()
448 ret = -EINVAL; in netx_verify_port()
474 .port = {
487 .port = {
497 .line = 1,
500 .port = {
517 static void netx_console_putchar(struct uart_port *port, int ch) in netx_console_putchar() argument
519 while (readl(port->membase + UART_FR) & FR_BUSY); in netx_console_putchar()
520 writel(ch, port->membase + UART_DR); in netx_console_putchar()
526 struct uart_port *port = &netx_ports[co->index].port; in netx_console_write() local
529 cr_save = readl(port->membase + UART_CR); in netx_console_write()
530 writel(cr_save | CR_UART_EN, port->membase + UART_CR); in netx_console_write()
532 uart_console_write(port, s, count, netx_console_putchar); in netx_console_write()
534 while (readl(port->membase + UART_FR) & FR_BUSY); in netx_console_write()
535 writel(cr_save, port->membase + UART_CR); in netx_console_write()
539 netx_console_get_options(struct uart_port *port, int *baud, in netx_console_get_options() argument
544 *baud = (readl(port->membase + UART_BAUDDIV_MSB) << 8) | in netx_console_get_options()
545 readl(port->membase + UART_BAUDDIV_LSB); in netx_console_get_options()
552 line_cr = readl(port->membase + UART_LINE_CR); in netx_console_get_options()
576 if (readl(port->membase + UART_RTS_CR) & RTS_CR_AUTO) in netx_console_get_options()
591 * if so, search for the first available port that does have in netx_console_setup()
594 if (co->index == -1 || co->index >= ARRAY_SIZE(netx_ports)) in netx_console_setup()
595 co->index = 0; in netx_console_setup()
596 sport = &netx_ports[co->index]; in netx_console_setup()
604 if (readl(sport->port.membase + UART_CR) & CR_UART_EN) { in netx_console_setup()
605 netx_console_get_options(&sport->port, &baud, in netx_console_setup()
611 return uart_set_options(&sport->port, co, baud, parity, bits, flow); in netx_console_setup()
621 .index = -1,
652 uart_suspend_port(&netx_reg, &sport->port); in serial_netx_suspend()
662 uart_resume_port(&netx_reg, &sport->port); in serial_netx_resume()
669 struct uart_port *port = &netx_ports[pdev->id].port; in serial_netx_probe() local
671 dev_info(&pdev->dev, "initialising\n"); in serial_netx_probe()
673 port->dev = &pdev->dev; in serial_netx_probe()
675 writel(1, port->membase + UART_RXFIFO_IRQLEVEL); in serial_netx_probe()
676 uart_add_one_port(&netx_reg, &netx_ports[pdev->id].port); in serial_netx_probe()
677 platform_set_drvdata(pdev, &netx_ports[pdev->id]); in serial_netx_probe()
687 uart_remove_one_port(&netx_reg, &sport->port); in serial_netx_remove()
731 MODULE_DESCRIPTION("NetX serial port driver");