diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/8250_exar_st16c554.c | 52 | ||||
| -rw-r--r-- | drivers/serial/8250_pnp.c | 29 | ||||
| -rw-r--r-- | drivers/serial/Kconfig | 30 | ||||
| -rw-r--r-- | drivers/serial/Makefile | 2 | ||||
| -rw-r--r-- | drivers/serial/amba-pl010.c | 2 | ||||
| -rw-r--r-- | drivers/serial/dz.c | 371 | ||||
| -rw-r--r-- | drivers/serial/dz.h | 32 | ||||
| -rw-r--r-- | drivers/serial/mpsc.c | 22 | ||||
| -rw-r--r-- | drivers/serial/uartlite.c | 505 |
9 files changed, 839 insertions, 206 deletions
diff --git a/drivers/serial/8250_exar_st16c554.c b/drivers/serial/8250_exar_st16c554.c new file mode 100644 index 00000000000..567143ace15 --- /dev/null +++ b/drivers/serial/8250_exar_st16c554.c @@ -0,0 +1,52 @@ +/* + * linux/drivers/serial/8250_exar.c + * + * Written by Paul B Schroeder < pschroeder "at" uplogix "dot" com > + * Based on 8250_boca. + * + * Copyright (C) 2005 Russell King. + * Data taken from include/asm-i386/serial.h + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/serial_8250.h> + +#define PORT(_base,_irq) \ + { \ + .iobase = _base, \ + .irq = _irq, \ + .uartclk = 1843200, \ + .iotype = UPIO_PORT, \ + .flags = UPF_BOOT_AUTOCONF, \ + } + +static struct plat_serial8250_port exar_data[] = { + PORT(0x100, 5), + PORT(0x108, 5), + PORT(0x110, 5), + PORT(0x118, 5), + { }, +}; + +static struct platform_device exar_device = { + .name = "serial8250", + .id = PLAT8250_DEV_EXAR_ST16C554, + .dev = { + .platform_data = exar_data, + }, +}; + +static int __init exar_init(void) +{ + return platform_device_register(&exar_device); +} + +module_init(exar_init); + +MODULE_AUTHOR("Paul B Schroeder"); +MODULE_DESCRIPTION("8250 serial probe module for Exar cards"); +MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c index 71d907c8288..d3d6b82706b 100644 --- a/drivers/serial/8250_pnp.c +++ b/drivers/serial/8250_pnp.c @@ -464,11 +464,38 @@ static void __devexit serial_pnp_remove(struct pnp_dev *dev) serial8250_unregister_port(line - 1); } +#ifdef CONFIG_PM +static int serial_pnp_suspend(struct pnp_dev *dev, pm_message_t state) +{ + long line = (long)pnp_get_drvdata(dev); + + if (!line) + return -ENODEV; + serial8250_suspend_port(line - 1); + return 0; +} + +static int serial_pnp_resume(struct pnp_dev *dev) +{ + long line = (long)pnp_get_drvdata(dev); + + if (!line) + return -ENODEV; + serial8250_resume_port(line - 1); + return 0; +} +#else +#define serial_pnp_suspend NULL +#define serial_pnp_resume NULL +#endif /* CONFIG_PM */ + static struct pnp_driver serial_pnp_driver = { .name = "serial", - .id_table = pnp_dev_table, .probe = serial_pnp_probe, .remove = __devexit_p(serial_pnp_remove), + .suspend = serial_pnp_suspend, + .resume = serial_pnp_resume, + .id_table = pnp_dev_table, }; static int __init serial8250_pnp_init(void) diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 0b71e7d1890..fc12d5df10e 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -210,6 +210,17 @@ config SERIAL_8250_BOCA To compile this driver as a module, choose M here: the module will be called 8250_boca. +config SERIAL_8250_EXAR_ST16C554 + tristate "Support Exar ST16C554/554D Quad UART" + depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS + help + The Uplogix Envoy TU301 uses this Exar Quad UART. If you are + tinkering with your Envoy TU301, or have a machine with this UART, + say Y here. + + To compile this driver as a module, choose M here: the module + will be called 8250_exar_st16c554. + config SERIAL_8250_HUB6 tristate "Support Hub6 cards" depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS @@ -511,6 +522,25 @@ config SERIAL_IMX_CONSOLE your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) +config SERIAL_UARTLITE + tristate "Xilinx uartlite serial port support" + depends on PPC32 + select SERIAL_CORE + help + Say Y here if you want to use the Xilinx uartlite serial controller. + + To compile this driver as a module, choose M here: the + module will be called uartlite.ko. + +config SERIAL_UARTLITE_CONSOLE + bool "Support for console on Xilinx uartlite serial port" + depends on SERIAL_UARTLITE=y + select SERIAL_CORE_CONSOLE + help + Say Y here if you wish to use a Xilinx uartlite as the system + console (the system console is the device which receives all kernel + messages and warnings and which allows logins in single user mode). + config SERIAL_SUNCORE bool depends on SPARC diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index b4d8a7c182e..df3632cd7df 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_SERIAL_8250_CONSOLE) += 8250_early.o obj-$(CONFIG_SERIAL_8250_FOURPORT) += 8250_fourport.o obj-$(CONFIG_SERIAL_8250_ACCENT) += 8250_accent.o obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o +obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o obj-$(CONFIG_SERIAL_8250_MCA) += 8250_mca.o obj-$(CONFIG_SERIAL_8250_AU1X00) += 8250_au1x00.o @@ -55,4 +56,5 @@ obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o obj-$(CONFIG_SERIAL_SGI_IOC4) += ioc4_serial.o obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_serial.o obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o +obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o obj-$(CONFIG_SERIAL_NETX) += netx-serial.o diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c index 4213fabc62b..4d3626ef464 100644 --- a/drivers/serial/amba-pl010.c +++ b/drivers/serial/amba-pl010.c @@ -129,6 +129,8 @@ static void pl010_rx_chars(struct uart_port *port) */ rsr = readb(port->membase + UART01x_RSR) | UART_DUMMY_RSR_RX; if (unlikely(rsr & UART01x_RSR_ANY)) { + writel(0, port->membase + UART01x_ECR); + if (rsr & UART01x_RSR_BE) { rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE); port->icount.brk++; diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c index 53662b33b84..af1544f3356 100644 --- a/drivers/serial/dz.c +++ b/drivers/serial/dz.c @@ -1,11 +1,13 @@ /* - * dz.c: Serial port driver for DECStations equiped + * dz.c: Serial port driver for DECstations equipped * with the DZ chipset. * * Copyright (C) 1998 Olivier A. D. Lebaillif * * Email: olivier.lebaillif@ifrsys.com * + * Copyright (C) 2004, 2006 Maciej W. Rozycki + * * [31-AUG-98] triemer * Changed IRQ to use Harald's dec internals interrupts.h * removed base_addr code - moving address assignment to setup.c @@ -26,10 +28,16 @@ #undef DEBUG_DZ +#if defined(CONFIG_SERIAL_DZ_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include <linux/delay.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/console.h> +#include <linux/sysrq.h> #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial_core.h> @@ -45,14 +53,10 @@ #include <asm/system.h> #include <asm/uaccess.h> -#define CONSOLE_LINE (3) /* for definition of struct console */ - #include "dz.h" -#define DZ_INTR_DEBUG 1 - static char *dz_name = "DECstation DZ serial driver version "; -static char *dz_version = "1.02"; +static char *dz_version = "1.03"; struct dz_port { struct uart_port port; @@ -61,22 +65,6 @@ struct dz_port { static struct dz_port dz_ports[DZ_NB_PORT]; -#ifdef DEBUG_DZ -/* - * debugging code to send out chars via prom - */ -static void debug_console(const char *s, int count) -{ - unsigned i; - - for (i = 0; i < count; i++) { - if (*s == 10) - prom_printf("%c", 13); - prom_printf("%c", *s++); - } -} -#endif - /* * ------------------------------------------------------------ * dz_in () and dz_out () @@ -90,6 +78,7 @@ static inline unsigned short dz_in(struct dz_port *dport, unsigned offset) { volatile unsigned short *addr = (volatile unsigned short *) (dport->port.membase + offset); + return *addr; } @@ -98,6 +87,7 @@ static inline void dz_out(struct dz_port *dport, unsigned offset, { volatile unsigned short *addr = (volatile unsigned short *) (dport->port.membase + offset); + *addr = value; } @@ -144,7 +134,7 @@ static void dz_stop_rx(struct uart_port *uport) spin_lock_irqsave(&dport->port.lock, flags); dport->cflag &= ~DZ_CREAD; - dz_out(dport, DZ_LPR, dport->cflag); + dz_out(dport, DZ_LPR, dport->cflag | dport->port.line); spin_unlock_irqrestore(&dport->port.lock, flags); } @@ -155,14 +145,14 @@ static void dz_enable_ms(struct uart_port *port) /* * ------------------------------------------------------------ - * Here starts the interrupt handling routines. All of the - * following subroutines are declared as inline and are folded - * into dz_interrupt. They were separated out for readability's - * sake. * - * Note: rs_interrupt() is a "fast" interrupt, which means that it + * Here start the interrupt handling routines. All of the following + * subroutines are declared as inline and are folded into + * dz_interrupt. They were separated out for readability's sake. + * + * Note: dz_interrupt() is a "fast" interrupt, which means that it * runs with interrupts turned off. People who may want to modify - * rs_interrupt() should try to keep the interrupt handler as fast as + * dz_interrupt() should try to keep the interrupt handler as fast as * possible. After you are done making modifications, it is not a bad * idea to do: * @@ -180,92 +170,74 @@ static void dz_enable_ms(struct uart_port *port) * This routine deals with inputs from any lines. * ------------------------------------------------------------ */ -static inline void dz_receive_chars(struct dz_port *dport) +static inline void dz_receive_chars(struct dz_port *dport_in, + struct pt_regs *regs) { + struct dz_port *dport; struct tty_struct *tty = NULL; struct uart_icount *icount; - int ignore = 0; - unsigned short status, tmp; + int lines_rx[DZ_NB_PORT] = { [0 ... DZ_NB_PORT - 1] = 0 }; + unsigned short status; unsigned char ch, flag; + int i; - /* this code is going to be a problem... - the call to tty_flip_buffer is going to need - to be rethought... - */ - do { - status = dz_in(dport, DZ_RBUF); - - /* punt so we don't get duplicate characters */ - if (!(status & DZ_DVAL)) - goto ignore_char; - - - ch = UCHAR(status); /* grab the char */ - flag = TTY_NORMAL; + while ((status = dz_in(dport_in, DZ_RBUF)) & DZ_DVAL) { + dport = &dz_ports[LINE(status)]; + tty = dport->port.info->tty; /* point to the proper dev */ -#if 0 - if (info->is_console) { - if (ch == 0) - return; /* it's a break ... */ - } -#endif + ch = UCHAR(status); /* grab the char */ - tty = dport->port.info->tty;/* now tty points to the proper dev */ icount = &dport->port.icount; - - if (!tty) - break; - icount->rx++; - /* keep track of the statistics */ - if (status & (DZ_OERR | DZ_FERR | DZ_PERR)) { - if (status & DZ_PERR) /* parity error */ - icount->parity++; - else if (status & DZ_FERR) /* frame error */ - icount->frame++; - if (status & DZ_OERR) /* overrun error */ - icount->overrun++; - - /* check to see if we should ignore the character - and mask off conditions that should be ignored + flag = TTY_NORMAL; + if (status & DZ_FERR) { /* frame error */ + /* + * There is no separate BREAK status bit, so + * treat framing errors as BREAKs for Magic SysRq + * and SAK; normally, otherwise. */ - - if (status & dport->port.ignore_status_mask) { - if (++ignore > 100) - break; - goto ignore_char; - } - /* mask off the error conditions we want to ignore */ - tmp = status & dport->port.read_status_mask; - - if (tmp & DZ_PERR) { - flag = TTY_PARITY; -#ifdef DEBUG_DZ - debug_console("PERR\n", 5); -#endif - } else if (tmp & DZ_FERR) { + if (uart_handle_break(&dport->port)) + continue; + if (dport->port.flags & UPF_SAK) + flag = TTY_BREAK; + else flag = TTY_FRAME; -#ifdef DEBUG_DZ - debug_console("FERR\n", 5); -#endif - } - if (tmp & DZ_OERR) { -#ifdef DEBUG_DZ - debug_console("OERR\n", 5); -#endif - tty_insert_flip_char(tty, ch, flag); - ch = 0; - flag = TTY_OVERRUN; - } + } else if (status & DZ_OERR) /* overrun error */ + flag = TTY_OVERRUN; + else if (status & DZ_PERR) /* parity error */ + flag = TTY_PARITY; + + /* keep track of the statistics */ + switch (flag) { + case TTY_FRAME: + icount->frame++; + break; + case TTY_PARITY: + icount->parity++; + break; + case TTY_OVERRUN: + icount->overrun++; + break; + case TTY_BREAK: + icount->brk++; + break; + default: + break; } - tty_insert_flip_char(tty, ch, flag); - ignore_char: - ; - } while (status & DZ_DVAL); - if (tty) - tty_flip_buffer_push(tty); + if (uart_handle_sysrq_char(&dport->port, ch, regs)) + continue; + + if ((status & dport->port.ignore_status_mask) == 0) { + uart_insert_char(&dport->port, + status, DZ_OERR, ch, flag); + lines_rx[LINE(status)] = 1; + } + } + for (i = 0; i < DZ_NB_PORT; i++) + if (lines_rx[i]) + tty_flip_buffer_push(dz_ports[i].port.info->tty); } /* @@ -275,26 +247,32 @@ static inline void dz_receive_chars(struct dz_port *dport) * This routine deals with outputs to any lines. * ------------------------------------------------------------ */ -static inline void dz_transmit_chars(struct dz_port *dport) +static inline void dz_transmit_chars(struct dz_port *dport_in) { - struct circ_buf *xmit = &dport->port.info->xmit; + struct dz_port *dport; + struct circ_buf *xmit; + unsigned short status; unsigned char tmp; - if (dport->port.x_char) { /* XON/XOFF chars */ + status = dz_in(dport_in, DZ_CSR); + dport = &dz_ports[LINE(status)]; + xmit = &dport->port.info->xmit; + + if (dport->port.x_char) { /* XON/XOFF chars */ dz_out(dport, DZ_TDR, dport->port.x_char); dport->port.icount.tx++; dport->port.x_char = 0; return; } - /* if nothing to do or stopped or hardware stopped */ + /* If nothing to do or stopped or hardware stopped. */ if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) { dz_stop_tx(&dport->port); return; } /* - * if something to do ... (rember the dz has no output fifo so we go - * one char at a time :-< + * If something to do... (remember the dz has no output fifo, + * so we go one char at a time) :-< */ tmp = xmit->buf[xmit->tail]; xmit->tail = (xmit->tail + 1) & (DZ_XMIT_SIZE - 1); @@ -304,23 +282,29 @@ static inline void dz_transmit_chars(struct dz_port *dport) if (uart_circ_chars_pending(xmit) < DZ_WAKEUP_CHARS) uart_write_wakeup(&dport->port); - /* Are we done */ + /* Are we are done. */ if (uart_circ_empty(xmit)) dz_stop_tx(&dport->port); } /* * ------------------------------------------------------------ - * check_modem_status () + * check_modem_status() * - * Only valid for the MODEM line duh ! + * DS 3100 & 5100: Only valid for the MODEM line, duh! + * DS 5000/200: Valid for the MODEM and PRINTER line. * ------------------------------------------------------------ */ static inline void check_modem_status(struct dz_port *dport) { + /* + * FIXME: + * 1. No status change interrupt; use a timer. + * 2. Handle the 3100/5000 as appropriate. --macro + */ unsigned short status; - /* if not ne modem line just return */ + /* If not the modem line just return. */ if (dport->port.line != DZ_MODEM) return; @@ -341,21 +325,18 @@ static inline void check_modem_status(struct dz_port *dport) */ static irqreturn_t dz_interrupt(int irq, void *dev) { - struct dz_port *dport; + struct dz_port *dport = (struct dz_port *)dev; unsigned short status; /* get the reason why we just got an irq */ - status = dz_in((struct dz_port *)dev, DZ_CSR); - dport = &dz_ports[LINE(status)]; + status = dz_in(dport, DZ_CSR); - if (status & DZ_RDONE) - dz_receive_chars(dport); + if ((status & (DZ_RDONE | DZ_RIE)) == (DZ_RDONE | DZ_RIE)) + dz_receive_chars(dport, regs); - if (status & DZ_TRDY) + if ((status & (DZ_TRDY | DZ_TIE)) == (DZ_TRDY | DZ_TIE)) dz_transmit_chars(dport); - /* FIXME: what about check modem status??? --rmk */ - return IRQ_HANDLED; } @@ -367,13 +348,13 @@ static irqreturn_t dz_interrupt(int irq, void *dev) static unsigned int dz_get_mctrl(struct uart_port *uport) { + /* + * FIXME: Handle the 3100/5000 as appropriate. --macro + */ struct dz_port *dport = (struct dz_port *)uport; unsigned int mctrl = TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; if (dport->port.line == DZ_MODEM) { - /* - * CHECKME: This is a guess from the other code... --rmk - */ if (dz_in(dport, DZ_MSR) & DZ_MODEM_DSR) mctrl &= ~TIOCM_DSR; } @@ -383,6 +364,9 @@ static unsigned int dz_get_mctrl(struct uart_port *uport) static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl) { + /* + * FIXME: Handle the 3100/5000 as appropriate. --macro + */ struct dz_port *dport = (struct dz_port *)uport; unsigned short tmp; @@ -409,13 +393,6 @@ static int dz_startup(struct uart_port *uport) unsigned long flags; unsigned short tmp; - /* The dz lines for the mouse/keyboard must be - * opened using their respective drivers. - */ - if ((dport->port.line == DZ_KEYBOARD) || - (dport->port.line == DZ_MOUSE)) - return -ENODEV; - spin_lock_irqsave(&dport->port.lock, flags); /* enable the interrupt and the scanning */ @@ -442,7 +419,8 @@ static void dz_shutdown(struct uart_port *uport) } /* - * get_lsr_info - get line status register info + * ------------------------------------------------------------------- + * dz_tx_empty() -- get the transmitter empty status * * Purpose: Let user call ioctl() to get info when the UART physically * is emptied. On bus types like RS485, the transmitter must @@ -450,21 +428,28 @@ static void dz_shutdown(struct uart_port *uport) * the transmit shift register is empty, not be done when the * transmit holding register is empty. This functionality * allows an RS485 driver to be written in user space. + * ------------------------------------------------------------------- */ static unsigned int dz_tx_empty(struct uart_port *uport) { struct dz_port *dport = (struct dz_port *)uport; - unsigned short status = dz_in(dport, DZ_LPR); + unsigned short tmp, mask = 1 << dport->port.line; - /* FIXME: this appears to be obviously broken --rmk. */ - return status ? TIOCSER_TEMT : 0; + tmp = dz_in(dport, DZ_TCR); + tmp &= mask; + + return tmp ? 0 : TIOCSER_TEMT; } static void dz_break_ctl(struct uart_port *uport, int break_state) { + /* + * FIXME: Can't access BREAK bits in TDR easily; + * reuse the code for polled TX. --macro + */ struct dz_port *dport = (struct dz_port *)uport; unsigned long flags; - unsigned short tmp, mask = 1 << uport->line; + unsigned short tmp, mask = 1 << dport->port.line; spin_lock_irqsave(&uport->lock, flags); tmp = dz_in(dport, DZ_TCR); @@ -561,7 +546,7 @@ static void dz_set_termios(struct uart_port *uport, struct termios *termios, spin_lock_irqsave(&dport->port.lock, flags); - dz_out(dport, DZ_LPR, cflag); + dz_out(dport, DZ_LPR, cflag | dport->port.line); dport->cflag = cflag; /* setup accept flag */ @@ -650,7 +635,7 @@ static void __init dz_init_ports(void) for (i = 0, dport = dz_ports; i < DZ_NB_PORT; i++, dport++) { spin_lock_init(&dport->port.lock); dport->port.membase = (char *) base; - dport->port.iotype = UPIO_PORT; + dport->port.iotype = UPIO_MEM; dport->port.irq = dec_interrupt[DEC_IRQ_DZ11]; dport->port.line = i; dport->port.fifosize = 1; @@ -662,10 +647,7 @@ static void __init dz_init_ports(void) static void dz_reset(struct dz_port *dport) { dz_out(dport, DZ_CSR, DZ_CLR); - while (dz_in(dport, DZ_CSR) & DZ_CLR); - /* FIXME: cpu_relax? */ - iob(); /* enable scanning */ @@ -673,26 +655,55 @@ static void dz_reset(struct dz_port *dport) } #ifdef CONFIG_SERIAL_DZ_CONSOLE +/* + * ------------------------------------------------------------------- + * dz_console_putchar() -- transmit a character + * + * Polled transmission. This is tricky. We need to mask transmit + * interrupts so that they do not interfere, enable the transmitter + * for the line requested and then wait till the transmit scanner + * requests data for this line. But it may request data for another + * line first, in which case we have to disable its transmitter and + * repeat waiting till our line pops up. Only then the character may + * be transmitted. Finally, the state of the transmitter mask is + * restored. Welcome to the world of PDP-11! + * ------------------------------------------------------------------- + */ static void dz_console_putchar(struct uart_port *uport, int ch) { struct dz_port *dport = (struct dz_port *)uport; unsigned long flags; - int loops = 2500; - unsigned short tmp = (unsigned char)ch; - /* this code sends stuff out to serial device - spinning its - wheels and waiting. */ + unsigned short csr, tcr, trdy, mask; + int loops = 10000; spin_lock_irqsave(&dport->port.lock, flags); + csr = dz_in(dport, DZ_CSR); + dz_out(dport, DZ_CSR, csr & ~DZ_TIE); + tcr = dz_in(dport, DZ_TCR); + tcr |= 1 << dport->port.line; + mask = tcr; + dz_out(dport, DZ_TCR, mask); + iob(); + spin_unlock_irqrestore(&dport->port.lock, flags); - /* spin our wheels */ - while (((dz_in(dport, DZ_CSR) & DZ_TRDY) != DZ_TRDY) && loops--) - /* FIXME: cpu_relax, udelay? --rmk */ - ; + while (loops--) { + trdy = dz_in(dport, DZ_CSR); + if (!(trdy & DZ_TRDY)) + continue; + trdy = (trdy & DZ_TLINE) >> 8; + if (trdy == dport->port.line) + break; + mask &= ~(1 << trdy); + dz_out(dport, DZ_TCR, mask); + iob(); + udelay(2); + } - /* Actually transmit the character. */ - dz_out(dport, DZ_TDR, tmp); + if (loops) /* Cannot send otherwise. */ + dz_out(dport, DZ_TDR, ch); - spin_unlock_irqrestore(&dport->port.lock, flags); + dz_out(dport, DZ_TCR, tcr); + dz_out(dport, DZ_CSR, csr); } /* @@ -703,11 +714,11 @@ static void dz_console_putchar(struct uart_port *uport, int ch) * The console must be locked when we get here. * ------------------------------------------------------------------- */ -static void dz_console_print(struct console *cons, +static void dz_console_print(struct console *co, const char *str, unsigned int count) { - struct dz_port *dport = &dz_ports[CONSOLE_LINE]; + struct dz_port *dport = &dz_ports[co->index]; #ifdef DEBUG_DZ prom_printf((char *) str); #endif @@ -716,49 +727,43 @@ static void dz_console_print(struct console *cons, static int __init dz_console_setup(struct console *co, char *options) { - struct dz_port *dport = &dz_ports[CONSOLE_LINE]; + struct dz_port *dport = &dz_ports[co->index]; int baud = 9600; int bits = 8; int parity = 'n'; int flow = 'n'; - int ret; - unsigned short mask, tmp; if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); dz_reset(dport); - ret = uart_set_options(&dport->port, co, baud, parity, bits, flow); - if (ret == 0) { - mask = 1 << dport->port.line; - tmp = dz_in(dport, DZ_TCR); /* read the TX flag */ - if (!(tmp & mask)) { - tmp |= mask; /* set the TX flag */ - dz_out(dport, DZ_TCR, tmp); - } - } - - return ret; + return uart_set_options(&dport->port, co, baud, parity, bits, flow); } -static struct console dz_sercons = -{ +static struct uart_driver dz_reg; +static struct console dz_sercons = { .name = "ttyS", .write = dz_console_print, .device = uart_console_device, .setup = dz_console_setup, - .flags = CON_CONSDEV | CON_PRINTBUFFER, - .index = CONSOLE_LINE, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &dz_reg, }; -void __init dz_serial_console_init(void) +static int __init dz_serial_console_init(void) { - dz_init_ports(); - - register_console(&dz_sercons); + if (!IOASIC) { + dz_init_ports(); + register_console(&dz_sercons); + return 0; + } else + return -ENXIO; } +console_initcall(dz_serial_console_init); + #define SERIAL_DZ_CONSOLE &dz_sercons #else #define SERIAL_DZ_CONSOLE NULL @@ -767,35 +772,29 @@ void __init dz_serial_console_init(void) static struct uart_driver dz_reg = { .owner = THIS_MODULE, .driver_name = "serial", - .dev_name = "ttyS%d", + .dev_name = "ttyS", .major = TTY_MAJOR, .minor = 64, .nr = DZ_NB_PORT, .cons = SERIAL_DZ_CONSOLE, }; -int __init dz_init(void) +static int __init dz_init(void) { - unsigned long flags; int ret, i; + if (IOASIC) + return -ENXIO; + printk("%s%s\n", dz_name, dz_version); dz_init_ports(); - save_flags(flags); - cli(); - #ifndef CONFIG_SERIAL_DZ_CONSOLE /* reset the chip */ dz_reset(&dz_ports[0]); #endif - /* order matters here... the trick is that flags - is updated... in request_irq - to immediatedly obliterate - it is unwise. */ - restore_flags(flags); - if (request_irq(dz_ports[0].port.irq, dz_interrupt, IRQF_DISABLED, "DZ", &dz_ports[0])) panic("Unable to register DZ interrupt"); @@ -810,5 +809,7 @@ int __init dz_init(void) return ret; } +module_init(dz_init); + MODULE_DESCRIPTION("DECstation DZ serial driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/serial/dz.h b/drivers/serial/dz.h index 86ef417382b..9674d4e4987 100644 --- a/drivers/serial/dz.h +++ b/drivers/serial/dz.h @@ -1,20 +1,22 @@ /* - * dz.h: Serial port driver for DECStations equiped + * dz.h: Serial port driver for DECstations equipped * with the DZ chipset. * * Copyright (C) 1998 Olivier A. D. Lebaillif * * Email: olivier.lebaillif@ifrsys.com * + * Copyright (C) 2004, 2006 Maciej W. Rozycki */ #ifndef DZ_SERIAL_H #define DZ_SERIAL_H /* - * Definitions for the Control and Status Received. + * Definitions for the Control and Status Register. */ #define DZ_TRDY 0x8000 /* Transmitter empty */ -#define DZ_TIE 0x4000 /* Transmitter Interrupt Enable */ +#define DZ_TIE 0x4000 /* Transmitter Interrupt Enbl */ +#define DZ_TLINE 0x0300 /* Transmitter Line Number */ #define DZ_RDONE 0x0080 /* Receiver data ready */ #define DZ_RIE 0x0040 /* Receive Interrupt Enable */ #define DZ_MSE 0x0020 /* Master Scan Enable */ @@ -22,32 +24,44 @@ #define DZ_MAINT 0x0008 /* Loop Back Mode */ /* - * Definitions for the Received buffer. + * Definitions for the Receiver Buffer Register. */ -#define DZ_RBUF_MASK 0x00FF /* Data Mask in the Receive Buffer */ -#define DZ_LINE_MASK 0x0300 /* Line Mask in the Receive Buffer */ +#define DZ_RBUF_MASK 0x00FF /* Data Mask */ +#define DZ_LINE_MASK 0x0300 /* Line Mask */ #define DZ_DVAL 0x8000 /* Valid Data indicator */ #define DZ_OERR 0x4000 /* Overrun error indicator */ #define DZ_FERR 0x2000 /* Frame error indicator */ #define DZ_PERR 0x1000 /* Parity error indicator */ -#define LINE(x) (x & DZ_LINE_MASK) >> 8 /* Get the line number from the input buffer */ -#define UCHAR(x) (unsigned char)(x & DZ_RBUF_MASK) +#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number + from the input buffer */ +#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK)) /* - * Definitions for the Transmit Register. + * Definitions for the Transmit Control Register. */ #define DZ_LINE_KEYBOARD 0x0001 #define DZ_LINE_MOUSE 0x0002 #define DZ_LINE_MODEM 0x0004 #define DZ_LINE_PRINTER 0x0008 +#define DZ_MODEM_RTS 0x0800 /* RTS for the modem line (2) */ #define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */ +#define DZ_PRINT_RTS 0x0200 /* RTS for the prntr line (3) */ +#define DZ_PRINT_DTR 0x0100 /* DTR for the prntr line (3) */ +#define DZ_LNENB 0x000f /* Transmitter Line Enable */ /* * Definitions for the Modem Status Register. */ +#define DZ_MODEM_RI 0x0800 /* RI for the modem line (2) */ +#define DZ_MODEM_CD 0x0400 /* CD for the modem line (2) */ #define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */ +#define DZ_MODEM_CTS 0x0100 /* CTS for the modem line (2) */ +#define DZ_PRINT_RI 0x0008 /* RI for the printer line (3) */ +#define DZ_PRINT_CD 0x0004 /* CD for the printer line (3) */ +#define DZ_PRINT_DSR 0x0002 /* DSR for the prntr line (3) */ +#define DZ_PRINT_CTS 0x0001 /* CTS for the prntr line (3) */ /* * Definitions for the Transmit Data Register. diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c index 8eea69f2998..29823bd60fb 100644 --- a/drivers/serial/mpsc.c +++ b/drivers/serial/mpsc.c @@ -555,7 +555,7 @@ mpsc_sdma_start_tx(struct mpsc_port_info *pi) if (!mpsc_sdma_tx_active(pi)) { txre = (struct mpsc_tx_desc *)(pi->txr + (pi->txr_tail * MPSC_TXRE_SIZE)); - dma_cache_sync((void *) txre, MPSC_TXRE_SIZE, DMA_FROM_DEVICE); + dma_cache_sync(pi->port.dev, (void *) txre, MPSC_TXRE_SIZE, DMA_FROM_DEVICE); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ invalidate_dcache_range((ulong)txre, @@ -931,7 +931,7 @@ mpsc_init_rings(struct mpsc_port_info *pi) } txre->link = cpu_to_be32(pi->txr_p); /* Wrap last back to first */ - dma_cache_sync((void *) pi->dma_region, MPSC_DMA_ALLOC_SIZE, + dma_cache_sync(pi->port.dev, (void *) pi->dma_region, MPSC_DMA_ALLOC_SIZE, DMA_BIDIRECTIONAL); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ @@ -1005,7 +1005,7 @@ mpsc_rx_intr(struct mpsc_port_info *pi) rxre = (struct mpsc_rx_desc *)(pi->rxr + (pi->rxr_posn*MPSC_RXRE_SIZE)); - dma_cache_sync((void *)rxre, MPSC_RXRE_SIZE, DMA_FROM_DEVICE); + dma_cache_sync(pi->port.dev, (void *)rxre, MPSC_RXRE_SIZE, DMA_FROM_DEVICE); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ invalidate_dcache_range((ulong)rxre, @@ -1029,7 +1029,7 @@ mpsc_rx_intr(struct mpsc_port_info *pi) } bp = pi->rxb + (pi->rxr_posn * MPSC_RXBE_SIZE); - dma_cache_sync((void *) bp, MPSC_RXBE_SIZE, DMA_FROM_DEVICE); + dma_cache_sync(pi->port.dev, (void *) bp, MPSC_RXBE_SIZE, DMA_FROM_DEVICE); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ invalidate_dcache_range((ulong)bp, @@ -1098,7 +1098,7 @@ next_frame: SDMA_DESC_CMDSTAT_F | SDMA_DESC_CMDSTAT_L); wmb(); - dma_cache_sync((void *)rxre, MPSC_RXRE_SIZE, DMA_BIDIRECTIONAL); + dma_cache_sync(pi->port.dev, (void *)rxre, MPSC_RXRE_SIZE, DMA_BIDIRECTIONAL); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ flush_dcache_range((ulong)rxre, @@ -1109,7 +1109,7 @@ next_frame: pi->rxr_posn = (pi->rxr_posn + 1) & (MPSC_RXR_ENTRIES - 1); rxre = (struct mpsc_rx_desc *)(pi->rxr + (pi->rxr_posn * MPSC_RXRE_SIZE)); - dma_cache_sync((void *)rxre, MPSC_RXRE_SIZE, DMA_FROM_DEVICE); + dma_cache_sync(pi->port.dev, (void *)rxre, MPSC_RXRE_SIZE, DMA_FROM_DEVICE); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ invalidate_dcache_range((ulong)rxre, @@ -1143,7 +1143,7 @@ mpsc_setup_tx_desc(struct mpsc_port_info *pi, u32 count, u32 intr) SDMA_DESC_CMDSTAT_EI : 0)); wmb(); - dma_cache_sync((void *) txre, MPSC_TXRE_SIZE, DMA_BIDIRECTIONAL); + dma_cache_sync(pi->port.dev, (void *) txre, MPSC_TXRE_SIZE, DMA_BIDIRECTIONAL); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ flush_dcache_range((ulong)txre, @@ -1192,7 +1192,7 @@ mpsc_copy_tx_data(struct mpsc_port_info *pi) else /* All tx data copied into ring bufs */ return; - dma_cache_sync((void *) bp, MPSC_TXBE_SIZE, DMA_BIDIRECTIONAL); + dma_cache_sync(pi->port.dev, (void *) bp, MPSC_TXBE_SIZE, DMA_BIDIRECTIONAL); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ flush_dcache_range((ulong)bp, @@ -1217,7 +1217,7 @@ mpsc_tx_intr(struct mpsc_port_info *pi) txre = (struct mpsc_tx_desc *)(pi->txr + (pi->txr_tail * MPSC_TXRE_SIZE)); - dma_cache_sync((void *) txre, MPSC_TXRE_SIZE, DMA_FROM_DEVICE); + dma_cache_sync(pi->port.dev, (void *) txre, MPSC_TXRE_SIZE, DMA_FROM_DEVICE); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ invalidate_dcache_range((ulong)txre, @@ -1235,7 +1235,7 @@ mpsc_tx_intr(struct mpsc_port_info *pi) txre = (struct mpsc_tx_desc *)(pi->txr + (pi->txr_tail * MPSC_TXRE_SIZE)); - dma_cache_sync((void *) txre, MPSC_TXRE_SIZE, + dma_cache_sync(pi->port.dev, (void *) txre, MPSC_TXRE_SIZE, DMA_FROM_DEVICE); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ @@ -1652,7 +1652,7 @@ mpsc_console_write(struct console *co, const char *s, uint count) count--; } - dma_cache_sync((void *) bp, MPSC_TXBE_SIZE, DMA_BIDIRECTIONAL); + dma_cache_sync(pi->port.dev, (void *) bp, MPSC_TXBE_SIZE, DMA_BIDIRECTIONAL); #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ flush_dcache_range((ulong)bp, diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c new file mode 100644 index 00000000000..83690653b78 --- /dev/null +++ b/drivers/serial/uartlite.c @@ -0,0 +1,505 @@ +/* + * uartlite.c: Serial driver for Xilinx uartlite serial controller + * + * Peter Korsgaard <jacmet@sunsite.dk> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/console.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/tty.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <asm/io.h> + +#define ULITE_MAJOR 204 +#define ULITE_MINOR 187 +#define ULITE_NR_UARTS 4 + +/* For register details see datasheet: + http://www.xilinx.com/bvdocs/ipcenter/data_sheet/opb_uartlite.pdf +*/ +#define ULITE_RX 0x00 +#define ULITE_TX 0x04 +#define ULITE_STATUS 0x08 +#define ULITE_CONTROL 0x0c + +#define ULITE_REGION 16 + +#define ULITE_STATUS_RXVALID 0x01 +#define ULITE_STATUS_RXFULL 0x02 +#define ULITE_STATUS_TXEMPTY 0x04 +#define ULITE_STATUS_TXFULL 0x08 +#define ULITE_STATUS_IE 0x10 +#define ULITE_STATUS_OVERRUN 0x20 +#define ULITE_STATUS_FRAME 0x40 +#define ULITE_STATUS_PARITY 0x80 + +#define ULITE_CONTROL_RST_TX 0x01 +#define ULITE_CONTROL_RST_RX 0x02 +#define ULITE_CONTROL_IE 0x10 + + +static struct uart_port ports[ULITE_NR_UARTS]; + +static int ulite_receive(struct uart_port *port, int stat) +{ + struct tty_struct *tty = port->info->tty; + unsigned char ch = 0; + char flag = TTY_NORMAL; + + if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN + | ULITE_STATUS_FRAME)) == 0) + return 0; + + /* stats */ + if (stat & ULITE_STATUS_RXVALID) { + port->icount.rx++; + ch = readb(port->membase + ULITE_RX); + + if (stat & ULITE_STATUS_PARITY) + port->icount.parity++; + } + + if (stat & ULITE_STATUS_OVERRUN) + port->icount.overrun++; + + if (stat & ULITE_STATUS_FRAME) + port->icount.frame++; + + + /* drop byte with parity error if IGNPAR specificed */ + if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY) + stat &= ~ULITE_STATUS_RXVALID; + + stat &= port->read_status_mask; + + if (stat & ULITE_STATUS_PARITY) + flag = TTY_PARITY; + + + stat &= ~port->ignore_status_mask; + + if (stat & ULITE_STATUS_RXVALID) + tty_insert_flip_char(tty, ch, flag); + + if (stat & ULITE_STATUS_FRAME) + tty_insert_flip_char(tty, 0, TTY_FRAME); + + if (stat & ULITE_STATUS_OVERRUN) + tty_insert_flip_char(tty, 0, TTY_OVERRUN); + + return 1; +} + +static int ulite_transmit(struct uart_port *port, int stat) +{ + struct circ_buf *xmit = &port->info->xmit; + + if (stat & ULITE_STATUS_TXFULL) + return 0; + + if (port->x_char) { + writeb(port->x_char, port->membase + ULITE_TX); + port->x_char = 0; + port->icount.tx++; + return 1; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) + return 0; + + writeb(xmit->buf[xmit->tail], port->membase + ULITE_TX); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1); + port->icount.tx++; + + /* wake up */ + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + return 1; +} + +static irqreturn_t ulite_isr(int irq, void *dev_id) +{ + struct uart_port *port = (struct uart_port *)dev_id; + int busy; + + do { + int stat = readb(port->membase + ULITE_STATUS); + busy = ulite_receive(port, stat); + busy |= ulite_transmit(port, stat); + } while (busy); + + tty_flip_buffer_push(port->info->tty); + + return IRQ_HANDLED; +} + +static unsigned int ulite_tx_empty(struct uart_port *port) +{ + unsigned long flags; + unsigned int ret; + + spin_lock_irqsave(&port->lock, flags); + ret = readb(port->membase + ULITE_STATUS); + spin_unlock_irqrestore(&port->lock, flags); + + return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0; +} + +static unsigned int ulite_get_mctrl(struct uart_port *port) +{ + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; +} + +static void ulite_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* N/A */ +} + +static void ulite_stop_tx(struct uart_port *port) +{ + /* N/A */ +} + +static void ulite_start_tx(struct uart_port *port) +{ + ulite_transmit(port, readb(port->membase + ULITE_STATUS)); +} + +static void ulite_stop_rx(struct uart_port *port) +{ + /* don't forward any more data (like !CREAD) */ + port->ignore_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY + | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; +} + +static void ulite_enable_ms(struct uart_port *port) +{ + /* N/A */ +} + +static void ulite_break_ctl(struct uart_port *port, int ctl) +{ + /* N/A */ +} + +static int ulite_startup(struct uart_port *port) +{ + int ret; + + ret = request_irq(port->irq, ulite_isr, + IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "uartlite", port); + if (ret) + return ret; + + writeb(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX, + port->membase + ULITE_CONTROL); + writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); + + return 0; +} + +static void ulite_shutdown(struct uart_port *port) +{ + writeb(0, port->membase + ULITE_CONTROL); + readb(port->membase + ULITE_CONTROL); /* dummy */ + free_irq(port->irq, port); +} + +static void ulite_set_termios(struct uart_port *port, struct termios *termios, + struct termios *old) +{ + unsigned long flags; + unsigned int baud; + + spin_lock_irqsave(&port->lock, flags); + + port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN + | ULITE_STATUS_TXFULL; + + if (termios->c_iflag & INPCK) + port->read_status_mask |= + ULITE_STATUS_PARITY | ULITE_STATUS_FRAME; + + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + port->ignore_status_mask |= ULITE_STATUS_PARITY + | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; + + /* ignore all characters if CREAD is not set */ + if ((termios->c_cflag & CREAD) == 0) + port->ignore_status_mask |= + ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY + | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; + + /* update timeout */ + baud = uart_get_baud_rate(port, termios, old, 0, 460800); + uart_update_timeout(port, termios->c_cflag, baud); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static const char *ulite_type(struct uart_port *port) +{ + return port->type == PORT_UARTLITE ? "uartlite" : NULL; +} + +static void ulite_release_port(struct uart_port *port) +{ + release_mem_region(port->mapbase, ULITE_REGION); + iounmap(port->membase); + port->membase = 0; +} + +static int ulite_request_port(struct uart_port *port) +{ + if (!request_mem_region(port->mapbase, ULITE_REGION, "uartlite")) { + dev_err(port->dev, "Memory region busy\n"); + return -EBUSY; + } + + port->membase = ioremap(port->mapbase, ULITE_REGION); + if (!port->membase) { + dev_err(port->dev, "Unable to map registers\n"); + release_mem_region(port->mapbase, ULITE_REGION); + return -EBUSY; + } + + return 0; +} + +static void ulite_config_port(struct uart_port *port, int flags) +{ + ulite_request_port(port); + port->type = PORT_UARTLITE; +} + +static int ulite_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + /* we don't want the core code to modify any port params */ + return -EINVAL; +} + +static struct uart_ops ulite_ops = { + .tx_empty = ulite_tx_empty, + .set_mctrl = ulite_set_mctrl, + .get_mctrl = ulite_get_mctrl, + .stop_tx = ulite_stop_tx, + .start_tx = ulite_start_tx, + .stop_rx = ulite_stop_rx, + .enable_ms = ulite_enable_ms, + .break_ctl = ulite_break_ctl, + .startup = ulite_startup, + .shutdown = ulite_shutdown, + .set_termios = ulite_set_termios, + .type = ulite_type, + .release_port = ulite_release_port, + .request_port = ulite_request_port, + .config_port = ulite_config_port, + .verify_port = ulite_verify_port +}; + +#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE +static void ulite_console_wait_tx(struct uart_port *port) +{ + int i; + + /* wait up to 10ms for the character(s) to be sent */ + for (i = 0; i < 10000; i++) { + if (readb(port->membase + ULITE_STATUS) & ULITE_STATUS_TXEMPTY) + break; + udelay(1); + } +} + +static void ulite_console_putchar(struct uart_port *port, int ch) +{ + ulite_console_wait_tx(port); + writeb(ch, port->membase + ULITE_TX); +} + +static void ulite_console_write(struct console *co, const char *s, + unsigned int count) +{ + struct uart_port *port = &ports[co->index]; + unsigned long flags; + unsigned int ier; + int locked = 1; + + if (oops_in_progress) { + locked = spin_trylock_irqsave(&port->lock, flags); + } else + spin_lock_irqsave(&port->lock, flags); + + /* save and disable interrupt */ + ier = readb(port->membase + ULITE_STATUS) & ULITE_STATUS_IE; + writeb(0, port->membase + ULITE_CONTROL); + + uart_console_write(port, s, count, ulite_console_putchar); + + ulite_console_wait_tx(port); + + /* restore interrupt state */ + if (ier) + writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); + + if (locked) + spin_unlock_irqrestore(&port->lock, flags); +} + +static int __init ulite_console_setup(struct console *co, char *options) +{ + struct uart_port *port; + int baud = 9600; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + if (co->index < 0 || co->index >= ULITE_NR_UARTS) + return -EINVAL; + + port = &ports[co->index]; + + /* not initialized yet? */ + if (!port->membase) + return -ENODEV; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +static struct uart_driver ulite_uart_driver; + +static struct console ulite_console = { + .name = "ttyUL", + .write = ulite_console_write, + .device = uart_console_device, + .setup = ulite_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, /* Specified on the cmdline (e.g. console=ttyUL0 ) */ + .data = &ulite_uart_driver, +}; + +static int __init ulite_console_init(void) +{ + register_console(&ulite_console); + return 0; +} + +console_initcall(ulite_console_init); + +#endif /* CONFIG_SERIAL_UARTLITE_CONSOLE */ + +static struct uart_driver ulite_uart_driver = { + .owner = THIS_MODULE, + .driver_name = "uartlite", + .dev_name = "ttyUL", + .major = ULITE_MAJOR, + .minor = ULITE_MINOR, + .nr = ULITE_NR_UARTS, +#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE + .cons = &ulite_console, +#endif +}; + +static int __devinit ulite_probe(struct platform_device *pdev) +{ + struct resource *res, *res2; + struct uart_port *port; + + if (pdev->id < 0 || pdev->id >= ULITE_NR_UARTS) + return -EINVAL; + + if (ports[pdev->id].membase) + return -EBUSY; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res2) + return -ENODEV; + + port = &ports[pdev->id]; + + port->fifosize = 16; + port->regshift = 2; + port->iotype = UPIO_MEM; + port->iobase = 1; /* mark port in use */ + port->mapbase = res->start; + port->membase = 0; + port->ops = &ulite_ops; + port->irq = res2->start; + port->flags = UPF_BOOT_AUTOCONF; + port->dev = &pdev->dev; + port->type = PORT_UNKNOWN; + port->line = pdev->id; + + uart_add_one_port(&ulite_uart_driver, port); + platform_set_drvdata(pdev, port); + + return 0; +} + +static int ulite_remove(struct platform_device *pdev) +{ + struct uart_port *port = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + + if (port) + uart_remove_one_port(&ulite_uart_driver, port); + + /* mark port as free */ + port->membase = 0; + + return 0; +} + +static struct platform_driver ulite_platform_driver = { + .probe = ulite_probe, + .remove = ulite_remove, + .driver = { + .owner = THIS_MODULE, + .name = "uartlite", + }, +}; + +int __init ulite_init(void) +{ + int ret; + + ret = uart_register_driver(&ulite_uart_driver); + if (ret) + return ret; + + ret = platform_driver_register(&ulite_platform_driver); + if (ret) + uart_unregister_driver(&ulite_uart_driver); + + return ret; +} + +void __exit ulite_exit(void) +{ + platform_driver_unregister(&ulite_platform_driver); + uart_unregister_driver(&ulite_uart_driver); +} + +module_init(ulite_init); +module_exit(ulite_exit); + +MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>"); +MODULE_DESCRIPTION("Xilinx uartlite serial driver"); +MODULE_LICENSE("GPL"); |