mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-29 11:11:45 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: sparc: Set UTS_MACHINE correctly. sparc,leon: init_leon srmmu cleanup sparc32: Remove early interrupt enable. sparc, leon: Added Aeroflex Gaisler entry in manufacturer_info structure sparc64: Faster early-boot framebuffer console. Revert "sparc: Make atomic locks raw" sparc: remove unused nfsd #includes sparc: Fixup last users of irq_chip->typename Added sparc_leon3_snooping_enabled() and converted extern inline to static inline No auxio on LEON apbuart: Use of_find_node_by_path to find root node. sparc: Replace old style lock initializer sparc: Make atomic locks raw apbuart: Fix build and missing driver unregister. apbuart: Kill dependency on deprecated Sparc-only PROM interfaces. apbuart: Fix build warning. sparc: Support for GRLIB APBUART serial port watchdog: Remove BKL from rio watchdog driver sparc: Remove BKL from apc sparc,leon: Sparc-Leon SMP support
This commit is contained in:
Linus Torvalds
commit
ee1262dbc6
30 changed files with 2262 additions and 57 deletions
|
|
@ -1477,4 +1477,17 @@ config SERIAL_BCM63XX_CONSOLE
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If you have enabled the serial port on the bcm63xx CPU
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you can make it the console by answering Y to this option.
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config SERIAL_GRLIB_GAISLER_APBUART
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tristate "GRLIB APBUART serial support"
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depends on OF
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---help---
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Add support for the GRLIB APBUART serial port.
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config SERIAL_GRLIB_GAISLER_APBUART_CONSOLE
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bool "Console on GRLIB APBUART serial port"
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depends on SERIAL_GRLIB_GAISLER_APBUART=y
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select SERIAL_CORE_CONSOLE
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help
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Support for running a console on the GRLIB APBUART
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endmenu
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@ -81,3 +81,4 @@ obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o
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obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o
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obj-$(CONFIG_SERIAL_QE) += ucc_uart.o
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obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o
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obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o
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710
drivers/serial/apbuart.c
Normal file
710
drivers/serial/apbuart.c
Normal file
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@ -0,0 +1,710 @@
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/*
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* Driver for GRLIB serial ports (APBUART)
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*
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* Based on linux/drivers/serial/amba.c
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*
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* Copyright (C) 2000 Deep Blue Solutions Ltd.
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* Copyright (C) 2003 Konrad Eisele <eiselekd@web.de>
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* Copyright (C) 2006 Daniel Hellstrom <daniel@gaisler.com>, Aeroflex Gaisler AB
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* Copyright (C) 2008 Gilead Kutnick <kutnickg@zin-tech.com>
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* Copyright (C) 2009 Kristoffer Glembo <kristoffer@gaisler.com>, Aeroflex Gaisler AB
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*/
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#if defined(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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#define SUPPORT_SYSRQ
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#endif
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#include <linux/module.h>
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#include <linux/tty.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/serial.h>
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#include <linux/console.h>
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#include <linux/sysrq.h>
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#include <linux/kthread.h>
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#include <linux/device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/serial_core.h>
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#include <asm/irq.h>
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#include "apbuart.h"
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#define SERIAL_APBUART_MAJOR TTY_MAJOR
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#define SERIAL_APBUART_MINOR 64
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#define UART_DUMMY_RSR_RX 0x8000 /* for ignore all read */
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static void apbuart_tx_chars(struct uart_port *port);
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static void apbuart_stop_tx(struct uart_port *port)
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{
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unsigned int cr;
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cr = UART_GET_CTRL(port);
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cr &= ~UART_CTRL_TI;
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UART_PUT_CTRL(port, cr);
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}
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static void apbuart_start_tx(struct uart_port *port)
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{
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unsigned int cr;
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cr = UART_GET_CTRL(port);
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cr |= UART_CTRL_TI;
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UART_PUT_CTRL(port, cr);
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if (UART_GET_STATUS(port) & UART_STATUS_THE)
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apbuart_tx_chars(port);
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}
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static void apbuart_stop_rx(struct uart_port *port)
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{
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unsigned int cr;
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cr = UART_GET_CTRL(port);
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cr &= ~(UART_CTRL_RI);
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UART_PUT_CTRL(port, cr);
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}
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static void apbuart_enable_ms(struct uart_port *port)
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{
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/* No modem status change interrupts for APBUART */
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}
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static void apbuart_rx_chars(struct uart_port *port)
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{
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struct tty_struct *tty = port->state->port.tty;
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unsigned int status, ch, rsr, flag;
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unsigned int max_chars = port->fifosize;
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status = UART_GET_STATUS(port);
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while (UART_RX_DATA(status) && (max_chars--)) {
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ch = UART_GET_CHAR(port);
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flag = TTY_NORMAL;
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port->icount.rx++;
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rsr = UART_GET_STATUS(port) | UART_DUMMY_RSR_RX;
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UART_PUT_STATUS(port, 0);
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if (rsr & UART_STATUS_ERR) {
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if (rsr & UART_STATUS_BR) {
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rsr &= ~(UART_STATUS_FE | UART_STATUS_PE);
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port->icount.brk++;
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if (uart_handle_break(port))
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goto ignore_char;
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} else if (rsr & UART_STATUS_PE) {
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port->icount.parity++;
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} else if (rsr & UART_STATUS_FE) {
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port->icount.frame++;
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}
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if (rsr & UART_STATUS_OE)
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port->icount.overrun++;
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rsr &= port->read_status_mask;
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if (rsr & UART_STATUS_PE)
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flag = TTY_PARITY;
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else if (rsr & UART_STATUS_FE)
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flag = TTY_FRAME;
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}
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if (uart_handle_sysrq_char(port, ch))
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goto ignore_char;
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uart_insert_char(port, rsr, UART_STATUS_OE, ch, flag);
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ignore_char:
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status = UART_GET_STATUS(port);
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}
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tty_flip_buffer_push(tty);
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}
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static void apbuart_tx_chars(struct uart_port *port)
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{
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struct circ_buf *xmit = &port->state->xmit;
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int count;
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if (port->x_char) {
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UART_PUT_CHAR(port, port->x_char);
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port->icount.tx++;
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port->x_char = 0;
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return;
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}
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if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
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apbuart_stop_tx(port);
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return;
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}
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/* amba: fill FIFO */
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count = port->fifosize >> 1;
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do {
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UART_PUT_CHAR(port, xmit->buf[xmit->tail]);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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port->icount.tx++;
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if (uart_circ_empty(xmit))
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break;
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} while (--count > 0);
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(port);
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if (uart_circ_empty(xmit))
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apbuart_stop_tx(port);
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}
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static irqreturn_t apbuart_int(int irq, void *dev_id)
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{
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struct uart_port *port = dev_id;
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unsigned int status;
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spin_lock(&port->lock);
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status = UART_GET_STATUS(port);
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if (status & UART_STATUS_DR)
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apbuart_rx_chars(port);
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if (status & UART_STATUS_THE)
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apbuart_tx_chars(port);
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spin_unlock(&port->lock);
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return IRQ_HANDLED;
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}
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static unsigned int apbuart_tx_empty(struct uart_port *port)
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{
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unsigned int status = UART_GET_STATUS(port);
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return status & UART_STATUS_THE ? TIOCSER_TEMT : 0;
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}
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static unsigned int apbuart_get_mctrl(struct uart_port *port)
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{
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/* The GRLIB APBUART handles flow control in hardware */
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return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
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}
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static void apbuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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/* The GRLIB APBUART handles flow control in hardware */
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}
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static void apbuart_break_ctl(struct uart_port *port, int break_state)
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{
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/* We don't support sending break */
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}
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static int apbuart_startup(struct uart_port *port)
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{
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int retval;
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unsigned int cr;
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/* Allocate the IRQ */
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retval = request_irq(port->irq, apbuart_int, 0, "apbuart", port);
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if (retval)
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return retval;
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/* Finally, enable interrupts */
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cr = UART_GET_CTRL(port);
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UART_PUT_CTRL(port,
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cr | UART_CTRL_RE | UART_CTRL_TE |
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UART_CTRL_RI | UART_CTRL_TI);
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return 0;
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}
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static void apbuart_shutdown(struct uart_port *port)
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{
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unsigned int cr;
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/* disable all interrupts, disable the port */
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cr = UART_GET_CTRL(port);
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UART_PUT_CTRL(port,
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cr & ~(UART_CTRL_RE | UART_CTRL_TE |
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UART_CTRL_RI | UART_CTRL_TI));
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/* Free the interrupt */
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free_irq(port->irq, port);
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}
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static void apbuart_set_termios(struct uart_port *port,
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struct ktermios *termios, struct ktermios *old)
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{
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unsigned int cr;
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unsigned long flags;
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unsigned int baud, quot;
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/* Ask the core to calculate the divisor for us. */
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baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
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if (baud == 0)
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panic("invalid baudrate %i\n", port->uartclk / 16);
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/* uart_get_divisor calc a *16 uart freq, apbuart is *8 */
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quot = (uart_get_divisor(port, baud)) * 2;
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cr = UART_GET_CTRL(port);
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cr &= ~(UART_CTRL_PE | UART_CTRL_PS);
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||||
if (termios->c_cflag & PARENB) {
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cr |= UART_CTRL_PE;
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if ((termios->c_cflag & PARODD))
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cr |= UART_CTRL_PS;
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}
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||||
|
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/* Enable flow control. */
|
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if (termios->c_cflag & CRTSCTS)
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cr |= UART_CTRL_FL;
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||||
spin_lock_irqsave(&port->lock, flags);
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||||
|
||||
/* Update the per-port timeout. */
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uart_update_timeout(port, termios->c_cflag, baud);
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||||
|
||||
port->read_status_mask = UART_STATUS_OE;
|
||||
if (termios->c_iflag & INPCK)
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||||
port->read_status_mask |= UART_STATUS_FE | UART_STATUS_PE;
|
||||
|
||||
/* Characters to ignore */
|
||||
port->ignore_status_mask = 0;
|
||||
if (termios->c_iflag & IGNPAR)
|
||||
port->ignore_status_mask |= UART_STATUS_FE | UART_STATUS_PE;
|
||||
|
||||
/* Ignore all characters if CREAD is not set. */
|
||||
if ((termios->c_cflag & CREAD) == 0)
|
||||
port->ignore_status_mask |= UART_DUMMY_RSR_RX;
|
||||
|
||||
/* Set baud rate */
|
||||
quot -= 1;
|
||||
UART_PUT_SCAL(port, quot);
|
||||
UART_PUT_CTRL(port, cr);
|
||||
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
}
|
||||
|
||||
static const char *apbuart_type(struct uart_port *port)
|
||||
{
|
||||
return port->type == PORT_APBUART ? "GRLIB/APBUART" : NULL;
|
||||
}
|
||||
|
||||
static void apbuart_release_port(struct uart_port *port)
|
||||
{
|
||||
release_mem_region(port->mapbase, 0x100);
|
||||
}
|
||||
|
||||
static int apbuart_request_port(struct uart_port *port)
|
||||
{
|
||||
return request_mem_region(port->mapbase, 0x100, "grlib-apbuart")
|
||||
!= NULL ? 0 : -EBUSY;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Configure/autoconfigure the port */
|
||||
static void apbuart_config_port(struct uart_port *port, int flags)
|
||||
{
|
||||
if (flags & UART_CONFIG_TYPE) {
|
||||
port->type = PORT_APBUART;
|
||||
apbuart_request_port(port);
|
||||
}
|
||||
}
|
||||
|
||||
/* Verify the new serial_struct (for TIOCSSERIAL) */
|
||||
static int apbuart_verify_port(struct uart_port *port,
|
||||
struct serial_struct *ser)
|
||||
{
|
||||
int ret = 0;
|
||||
if (ser->type != PORT_UNKNOWN && ser->type != PORT_APBUART)
|
||||
ret = -EINVAL;
|
||||
if (ser->irq < 0 || ser->irq >= NR_IRQS)
|
||||
ret = -EINVAL;
|
||||
if (ser->baud_base < 9600)
|
||||
ret = -EINVAL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct uart_ops grlib_apbuart_ops = {
|
||||
.tx_empty = apbuart_tx_empty,
|
||||
.set_mctrl = apbuart_set_mctrl,
|
||||
.get_mctrl = apbuart_get_mctrl,
|
||||
.stop_tx = apbuart_stop_tx,
|
||||
.start_tx = apbuart_start_tx,
|
||||
.stop_rx = apbuart_stop_rx,
|
||||
.enable_ms = apbuart_enable_ms,
|
||||
.break_ctl = apbuart_break_ctl,
|
||||
.startup = apbuart_startup,
|
||||
.shutdown = apbuart_shutdown,
|
||||
.set_termios = apbuart_set_termios,
|
||||
.type = apbuart_type,
|
||||
.release_port = apbuart_release_port,
|
||||
.request_port = apbuart_request_port,
|
||||
.config_port = apbuart_config_port,
|
||||
.verify_port = apbuart_verify_port,
|
||||
};
|
||||
|
||||
static struct uart_port grlib_apbuart_ports[UART_NR];
|
||||
static struct device_node *grlib_apbuart_nodes[UART_NR];
|
||||
|
||||
static int apbuart_scan_fifo_size(struct uart_port *port, int portnumber)
|
||||
{
|
||||
int ctrl, loop = 0;
|
||||
int status;
|
||||
int fifosize;
|
||||
unsigned long flags;
|
||||
|
||||
ctrl = UART_GET_CTRL(port);
|
||||
|
||||
/*
|
||||
* Enable the transceiver and wait for it to be ready to send data.
|
||||
* Clear interrupts so that this process will not be externally
|
||||
* interrupted in the middle (which can cause the transceiver to
|
||||
* drain prematurely).
|
||||
*/
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
UART_PUT_CTRL(port, ctrl | UART_CTRL_TE);
|
||||
|
||||
while (!UART_TX_READY(UART_GET_STATUS(port)))
|
||||
loop++;
|
||||
|
||||
/*
|
||||
* Disable the transceiver so data isn't actually sent during the
|
||||
* actual test.
|
||||
*/
|
||||
|
||||
UART_PUT_CTRL(port, ctrl & ~(UART_CTRL_TE));
|
||||
|
||||
fifosize = 1;
|
||||
UART_PUT_CHAR(port, 0);
|
||||
|
||||
/*
|
||||
* So long as transmitting a character increments the tranceivier FIFO
|
||||
* length the FIFO must be at least that big. These bytes will
|
||||
* automatically drain off of the FIFO.
|
||||
*/
|
||||
|
||||
status = UART_GET_STATUS(port);
|
||||
while (((status >> 20) & 0x3F) == fifosize) {
|
||||
fifosize++;
|
||||
UART_PUT_CHAR(port, 0);
|
||||
status = UART_GET_STATUS(port);
|
||||
}
|
||||
|
||||
fifosize--;
|
||||
|
||||
UART_PUT_CTRL(port, ctrl);
|
||||
local_irq_restore(flags);
|
||||
|
||||
if (fifosize == 0)
|
||||
fifosize = 1;
|
||||
|
||||
return fifosize;
|
||||
}
|
||||
|
||||
static void apbuart_flush_fifo(struct uart_port *port)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < port->fifosize; i++)
|
||||
UART_GET_CHAR(port);
|
||||
}
|
||||
|
||||
|
||||
/* ======================================================================== */
|
||||
/* Console driver, if enabled */
|
||||
/* ======================================================================== */
|
||||
|
||||
#ifdef CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE
|
||||
|
||||
static void apbuart_console_putchar(struct uart_port *port, int ch)
|
||||
{
|
||||
unsigned int status;
|
||||
do {
|
||||
status = UART_GET_STATUS(port);
|
||||
} while (!UART_TX_READY(status));
|
||||
UART_PUT_CHAR(port, ch);
|
||||
}
|
||||
|
||||
static void
|
||||
apbuart_console_write(struct console *co, const char *s, unsigned int count)
|
||||
{
|
||||
struct uart_port *port = &grlib_apbuart_ports[co->index];
|
||||
unsigned int status, old_cr, new_cr;
|
||||
|
||||
/* First save the CR then disable the interrupts */
|
||||
old_cr = UART_GET_CTRL(port);
|
||||
new_cr = old_cr & ~(UART_CTRL_RI | UART_CTRL_TI);
|
||||
UART_PUT_CTRL(port, new_cr);
|
||||
|
||||
uart_console_write(port, s, count, apbuart_console_putchar);
|
||||
|
||||
/*
|
||||
* Finally, wait for transmitter to become empty
|
||||
* and restore the TCR
|
||||
*/
|
||||
do {
|
||||
status = UART_GET_STATUS(port);
|
||||
} while (!UART_TX_READY(status));
|
||||
UART_PUT_CTRL(port, old_cr);
|
||||
}
|
||||
|
||||
static void __init
|
||||
apbuart_console_get_options(struct uart_port *port, int *baud,
|
||||
int *parity, int *bits)
|
||||
{
|
||||
if (UART_GET_CTRL(port) & (UART_CTRL_RE | UART_CTRL_TE)) {
|
||||
|
||||
unsigned int quot, status;
|
||||
status = UART_GET_STATUS(port);
|
||||
|
||||
*parity = 'n';
|
||||
if (status & UART_CTRL_PE) {
|
||||
if ((status & UART_CTRL_PS) == 0)
|
||||
*parity = 'e';
|
||||
else
|
||||
*parity = 'o';
|
||||
}
|
||||
|
||||
*bits = 8;
|
||||
quot = UART_GET_SCAL(port) / 8;
|
||||
*baud = port->uartclk / (16 * (quot + 1));
|
||||
}
|
||||
}
|
||||
|
||||
static int __init apbuart_console_setup(struct console *co, char *options)
|
||||
{
|
||||
struct uart_port *port;
|
||||
int baud = 38400;
|
||||
int bits = 8;
|
||||
int parity = 'n';
|
||||
int flow = 'n';
|
||||
|
||||
pr_debug("apbuart_console_setup co=%p, co->index=%i, options=%s\n",
|
||||
co, co->index, options);
|
||||
|
||||
/*
|
||||
* Check whether an invalid uart number has been specified, and
|
||||
* if so, search for the first available port that does have
|
||||
* console support.
|
||||
*/
|
||||
if (co->index >= grlib_apbuart_port_nr)
|
||||
co->index = 0;
|
||||
|
||||
port = &grlib_apbuart_ports[co->index];
|
||||
|
||||
spin_lock_init(&port->lock);
|
||||
|
||||
if (options)
|
||||
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
||||
else
|
||||
apbuart_console_get_options(port, &baud, &parity, &bits);
|
||||
|
||||
return uart_set_options(port, co, baud, parity, bits, flow);
|
||||
}
|
||||
|
||||
static struct uart_driver grlib_apbuart_driver;
|
||||
|
||||
static struct console grlib_apbuart_console = {
|
||||
.name = "ttyS",
|
||||
.write = apbuart_console_write,
|
||||
.device = uart_console_device,
|
||||
.setup = apbuart_console_setup,
|
||||
.flags = CON_PRINTBUFFER,
|
||||
.index = -1,
|
||||
.data = &grlib_apbuart_driver,
|
||||
};
|
||||
|
||||
|
||||
static void grlib_apbuart_configure(void);
|
||||
|
||||
static int __init apbuart_console_init(void)
|
||||
{
|
||||
grlib_apbuart_configure();
|
||||
register_console(&grlib_apbuart_console);
|
||||
return 0;
|
||||
}
|
||||
|
||||
console_initcall(apbuart_console_init);
|
||||
|
||||
#define APBUART_CONSOLE (&grlib_apbuart_console)
|
||||
#else
|
||||
#define APBUART_CONSOLE NULL
|
||||
#endif
|
||||
|
||||
static struct uart_driver grlib_apbuart_driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.driver_name = "serial",
|
||||
.dev_name = "ttyS",
|
||||
.major = SERIAL_APBUART_MAJOR,
|
||||
.minor = SERIAL_APBUART_MINOR,
|
||||
.nr = UART_NR,
|
||||
.cons = APBUART_CONSOLE,
|
||||
};
|
||||
|
||||
|
||||
/* ======================================================================== */
|
||||
/* OF Platform Driver */
|
||||
/* ======================================================================== */
|
||||
|
||||
static int __devinit apbuart_probe(struct of_device *op,
|
||||
const struct of_device_id *match)
|
||||
{
|
||||
int i = -1;
|
||||
struct uart_port *port = NULL;
|
||||
|
||||
i = 0;
|
||||
for (i = 0; i < grlib_apbuart_port_nr; i++) {
|
||||
if (op->node == grlib_apbuart_nodes[i])
|
||||
break;
|
||||
}
|
||||
|
||||
port = &grlib_apbuart_ports[i];
|
||||
port->dev = &op->dev;
|
||||
|
||||
uart_add_one_port(&grlib_apbuart_driver, (struct uart_port *) port);
|
||||
|
||||
apbuart_flush_fifo((struct uart_port *) port);
|
||||
|
||||
printk(KERN_INFO "grlib-apbuart at 0x%llx, irq %d\n",
|
||||
(unsigned long long) port->mapbase, port->irq);
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
static struct of_device_id __initdata apbuart_match[] = {
|
||||
{
|
||||
.name = "GAISLER_APBUART",
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct of_platform_driver grlib_apbuart_of_driver = {
|
||||
.match_table = apbuart_match,
|
||||
.probe = apbuart_probe,
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "grlib-apbuart",
|
||||
},
|
||||
};
|
||||
|
||||
|
||||
static void grlib_apbuart_configure(void)
|
||||
{
|
||||
static int enum_done;
|
||||
struct device_node *np, *rp;
|
||||
struct uart_port *port = NULL;
|
||||
const u32 *prop;
|
||||
int freq_khz;
|
||||
int v = 0, d = 0;
|
||||
unsigned int addr;
|
||||
int irq, line;
|
||||
struct amba_prom_registers *regs;
|
||||
|
||||
if (enum_done)
|
||||
return;
|
||||
|
||||
/* Get bus frequency */
|
||||
rp = of_find_node_by_path("/");
|
||||
rp = of_get_next_child(rp, NULL);
|
||||
prop = of_get_property(rp, "clock-frequency", NULL);
|
||||
freq_khz = *prop;
|
||||
|
||||
line = 0;
|
||||
for_each_matching_node(np, apbuart_match) {
|
||||
|
||||
int *vendor = (int *) of_get_property(np, "vendor", NULL);
|
||||
int *device = (int *) of_get_property(np, "device", NULL);
|
||||
int *irqs = (int *) of_get_property(np, "interrupts", NULL);
|
||||
regs = (struct amba_prom_registers *)
|
||||
of_get_property(np, "reg", NULL);
|
||||
|
||||
if (vendor)
|
||||
v = *vendor;
|
||||
if (device)
|
||||
d = *device;
|
||||
|
||||
if (!irqs || !regs)
|
||||
return;
|
||||
|
||||
grlib_apbuart_nodes[line] = np;
|
||||
|
||||
addr = regs->phys_addr;
|
||||
irq = *irqs;
|
||||
|
||||
port = &grlib_apbuart_ports[line];
|
||||
|
||||
port->mapbase = addr;
|
||||
port->membase = ioremap(addr, sizeof(struct grlib_apbuart_regs_map));
|
||||
port->irq = irq;
|
||||
port->iotype = UPIO_MEM;
|
||||
port->ops = &grlib_apbuart_ops;
|
||||
port->flags = UPF_BOOT_AUTOCONF;
|
||||
port->line = line;
|
||||
port->uartclk = freq_khz * 1000;
|
||||
port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line);
|
||||
line++;
|
||||
|
||||
/* We support maximum UART_NR uarts ... */
|
||||
if (line == UART_NR)
|
||||
break;
|
||||
|
||||
}
|
||||
|
||||
enum_done = 1;
|
||||
|
||||
grlib_apbuart_driver.nr = grlib_apbuart_port_nr = line;
|
||||
}
|
||||
|
||||
static int __init grlib_apbuart_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* Find all APBUARTS in device the tree and initialize their ports */
|
||||
grlib_apbuart_configure();
|
||||
|
||||
printk(KERN_INFO "Serial: GRLIB APBUART driver\n");
|
||||
|
||||
ret = uart_register_driver(&grlib_apbuart_driver);
|
||||
|
||||
if (ret) {
|
||||
printk(KERN_ERR "%s: uart_register_driver failed (%i)\n",
|
||||
__FILE__, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = of_register_platform_driver(&grlib_apbuart_of_driver);
|
||||
if (ret) {
|
||||
printk(KERN_ERR
|
||||
"%s: of_register_platform_driver failed (%i)\n",
|
||||
__FILE__, ret);
|
||||
uart_unregister_driver(&grlib_apbuart_driver);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit grlib_apbuart_exit(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < grlib_apbuart_port_nr; i++)
|
||||
uart_remove_one_port(&grlib_apbuart_driver,
|
||||
&grlib_apbuart_ports[i]);
|
||||
|
||||
uart_unregister_driver(&grlib_apbuart_driver);
|
||||
of_unregister_platform_driver(&grlib_apbuart_of_driver);
|
||||
}
|
||||
|
||||
module_init(grlib_apbuart_init);
|
||||
module_exit(grlib_apbuart_exit);
|
||||
|
||||
MODULE_AUTHOR("Aeroflex Gaisler AB");
|
||||
MODULE_DESCRIPTION("GRLIB APBUART serial driver");
|
||||
MODULE_VERSION("2.1");
|
||||
MODULE_LICENSE("GPL");
|
||||
64
drivers/serial/apbuart.h
Normal file
64
drivers/serial/apbuart.h
Normal file
|
|
@ -0,0 +1,64 @@
|
|||
#ifndef __GRLIB_APBUART_H__
|
||||
#define __GRLIB_APBUART_H__
|
||||
|
||||
#include <asm/io.h>
|
||||
|
||||
#define UART_NR 8
|
||||
static int grlib_apbuart_port_nr;
|
||||
|
||||
struct grlib_apbuart_regs_map {
|
||||
u32 data;
|
||||
u32 status;
|
||||
u32 ctrl;
|
||||
u32 scaler;
|
||||
};
|
||||
|
||||
struct amba_prom_registers {
|
||||
unsigned int phys_addr;
|
||||
unsigned int reg_size;
|
||||
};
|
||||
|
||||
/*
|
||||
* The following defines the bits in the APBUART Status Registers.
|
||||
*/
|
||||
#define UART_STATUS_DR 0x00000001 /* Data Ready */
|
||||
#define UART_STATUS_TSE 0x00000002 /* TX Send Register Empty */
|
||||
#define UART_STATUS_THE 0x00000004 /* TX Hold Register Empty */
|
||||
#define UART_STATUS_BR 0x00000008 /* Break Error */
|
||||
#define UART_STATUS_OE 0x00000010 /* RX Overrun Error */
|
||||
#define UART_STATUS_PE 0x00000020 /* RX Parity Error */
|
||||
#define UART_STATUS_FE 0x00000040 /* RX Framing Error */
|
||||
#define UART_STATUS_ERR 0x00000078 /* Error Mask */
|
||||
|
||||
/*
|
||||
* The following defines the bits in the APBUART Ctrl Registers.
|
||||
*/
|
||||
#define UART_CTRL_RE 0x00000001 /* Receiver enable */
|
||||
#define UART_CTRL_TE 0x00000002 /* Transmitter enable */
|
||||
#define UART_CTRL_RI 0x00000004 /* Receiver interrupt enable */
|
||||
#define UART_CTRL_TI 0x00000008 /* Transmitter irq */
|
||||
#define UART_CTRL_PS 0x00000010 /* Parity select */
|
||||
#define UART_CTRL_PE 0x00000020 /* Parity enable */
|
||||
#define UART_CTRL_FL 0x00000040 /* Flow control enable */
|
||||
#define UART_CTRL_LB 0x00000080 /* Loopback enable */
|
||||
|
||||
#define APBBASE(port) ((struct grlib_apbuart_regs_map *)((port)->membase))
|
||||
|
||||
#define APBBASE_DATA_P(port) (&(APBBASE(port)->data))
|
||||
#define APBBASE_STATUS_P(port) (&(APBBASE(port)->status))
|
||||
#define APBBASE_CTRL_P(port) (&(APBBASE(port)->ctrl))
|
||||
#define APBBASE_SCALAR_P(port) (&(APBBASE(port)->scaler))
|
||||
|
||||
#define UART_GET_CHAR(port) (__raw_readl(APBBASE_DATA_P(port)))
|
||||
#define UART_PUT_CHAR(port, v) (__raw_writel(v, APBBASE_DATA_P(port)))
|
||||
#define UART_GET_STATUS(port) (__raw_readl(APBBASE_STATUS_P(port)))
|
||||
#define UART_PUT_STATUS(port, v)(__raw_writel(v, APBBASE_STATUS_P(port)))
|
||||
#define UART_GET_CTRL(port) (__raw_readl(APBBASE_CTRL_P(port)))
|
||||
#define UART_PUT_CTRL(port, v) (__raw_writel(v, APBBASE_CTRL_P(port)))
|
||||
#define UART_GET_SCAL(port) (__raw_readl(APBBASE_SCALAR_P(port)))
|
||||
#define UART_PUT_SCAL(port, v) (__raw_writel(v, APBBASE_SCALAR_P(port)))
|
||||
|
||||
#define UART_RX_DATA(s) (((s) & UART_STATUS_DR) != 0)
|
||||
#define UART_TX_READY(s) (((s) & UART_STATUS_THE) != 0)
|
||||
|
||||
#endif /* __GRLIB_APBUART_H__ */
|
||||
Loading…
Reference in a new issue