mirror of https://gitee.com/openkylin/linux.git
[PATCH] txx9 serial update
Support for the new RBHMA4500 eval board for the TX4938. General update from the 8250 ancestor of this driver. Replace use of deprecated interfaces. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Acked-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ralf Baechle
Linus Torvalds
parent
fef266580e
commit
f5ee56cc18
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@ -31,6 +31,8 @@
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* 1.01 Set fifosize to make tx_empry called properly.
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* Use standard uart_get_divisor.
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* 1.02 Cleanup. (import 8250.c changes)
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* 1.03 Fix low-latency mode. (import 8250.c changes)
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* 1.04 Remove usage of deprecated functions, cleanup.
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*/
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#include <linux/config.h>
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@ -54,7 +56,7 @@
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#include <asm/io.h>
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#include <asm/irq.h>
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static char *serial_version = "1.02";
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static char *serial_version = "1.04";
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static char *serial_name = "TX39/49 Serial driver";
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#define PASS_LIMIT 256
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@ -86,9 +88,9 @@ static char *serial_name = "TX39/49 Serial driver";
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*/
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#ifdef ENABLE_SERIAL_TXX9_PCI
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#define NR_PCI_BOARDS 4
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#define UART_NR (2 + NR_PCI_BOARDS)
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#define UART_NR (4 + NR_PCI_BOARDS)
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#else
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#define UART_NR 2
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#define UART_NR 4
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#endif
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struct uart_txx9_port {
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@ -304,8 +306,11 @@ receive_chars(struct uart_txx9_port *up, unsigned int *status, struct pt_regs *r
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/* The following is not allowed by the tty layer and
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unsafe. It should be fixed ASAP */
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if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
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if(tty->low_latency)
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if (tty->low_latency) {
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spin_unlock(&up->port.lock);
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tty_flip_buffer_push(tty);
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spin_lock(&up->port.lock);
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}
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/* If this failed then we will throw away the
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bytes but must do so to clear interrupts */
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}
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@ -356,7 +361,9 @@ receive_chars(struct uart_txx9_port *up, unsigned int *status, struct pt_regs *r
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ignore_char:
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disr = sio_in(up, TXX9_SIDISR);
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} while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
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spin_unlock(&up->port.lock);
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tty_flip_buffer_push(tty);
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spin_lock(&up->port.lock);
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*status = disr;
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}
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@ -667,17 +674,8 @@ serial_txx9_pm(struct uart_port *port, unsigned int state,
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unsigned int oldstate)
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{
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struct uart_txx9_port *up = (struct uart_txx9_port *)port;
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if (state) {
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/* sleep */
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if (up->pm)
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up->pm(port, state, oldstate);
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} else {
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/* wake */
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if (up->pm)
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up->pm(port, state, oldstate);
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}
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if (up->pm)
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up->pm(port, state, oldstate);
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}
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static int serial_txx9_request_resource(struct uart_txx9_port *up)
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@ -979,14 +977,6 @@ static int __init serial_txx9_console_init(void)
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}
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console_initcall(serial_txx9_console_init);
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static int __init serial_txx9_late_console_init(void)
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{
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if (!(serial_txx9_console.flags & CON_ENABLED))
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register_console(&serial_txx9_console);
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return 0;
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}
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late_initcall(serial_txx9_late_console_init);
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#define SERIAL_TXX9_CONSOLE &serial_txx9_console
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#else
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#define SERIAL_TXX9_CONSOLE NULL
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@ -1039,6 +1029,73 @@ static void serial_txx9_resume_port(int line)
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uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
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}
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static DECLARE_MUTEX(serial_txx9_sem);
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/**
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* serial_txx9_register_port - register a serial port
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* @port: serial port template
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*
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* Configure the serial port specified by the request.
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*
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* The port is then probed and if necessary the IRQ is autodetected
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* If this fails an error is returned.
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*
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* On success the port is ready to use and the line number is returned.
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*/
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static int __devinit serial_txx9_register_port(struct uart_port *port)
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{
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int i;
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struct uart_txx9_port *uart;
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int ret = -ENOSPC;
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down(&serial_txx9_sem);
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for (i = 0; i < UART_NR; i++) {
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uart = &serial_txx9_ports[i];
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if (uart->port.type == PORT_UNKNOWN)
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break;
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}
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if (i < UART_NR) {
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uart_remove_one_port(&serial_txx9_reg, &uart->port);
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uart->port.iobase = port->iobase;
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uart->port.membase = port->membase;
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uart->port.irq = port->irq;
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uart->port.uartclk = port->uartclk;
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uart->port.iotype = port->iotype;
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uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
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uart->port.mapbase = port->mapbase;
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if (port->dev)
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uart->port.dev = port->dev;
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ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
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if (ret == 0)
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ret = uart->port.line;
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}
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up(&serial_txx9_sem);
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return ret;
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}
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/**
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* serial_txx9_unregister_port - remove a txx9 serial port at runtime
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* @line: serial line number
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*
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* Remove one serial port. This may not be called from interrupt
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* context. We hand the port back to the our control.
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*/
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static void __devexit serial_txx9_unregister_port(int line)
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{
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struct uart_txx9_port *uart = &serial_txx9_ports[line];
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down(&serial_txx9_sem);
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uart_remove_one_port(&serial_txx9_reg, &uart->port);
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uart->port.flags = 0;
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uart->port.type = PORT_UNKNOWN;
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uart->port.iobase = 0;
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uart->port.mapbase = 0;
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uart->port.membase = 0;
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uart->port.dev = NULL;
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uart_add_one_port(&serial_txx9_reg, &uart->port);
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up(&serial_txx9_sem);
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}
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/*
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* Probe one serial board. Unfortunately, there is no rhyme nor reason
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* to the arrangement of serial ports on a PCI card.
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@ -1056,13 +1113,13 @@ pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
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memset(&port, 0, sizeof(port));
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port.ops = &serial_txx9_pops;
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port.flags |= UPF_BOOT_AUTOCONF; /* uart_ops.config_port will be called */
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port.flags |= UPF_TXX9_HAVE_CTS_LINE;
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port.uartclk = 66670000;
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port.irq = dev->irq;
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port.iotype = UPIO_PORT;
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port.iobase = pci_resource_start(dev, 1);
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line = uart_register_port(&serial_txx9_reg, &port);
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port.dev = &dev->dev;
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line = serial_txx9_register_port(&port);
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if (line < 0) {
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printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
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}
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@ -1078,7 +1135,7 @@ static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
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pci_set_drvdata(dev, NULL);
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if (line) {
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uart_unregister_port(&serial_txx9_reg, line);
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serial_txx9_unregister_port(line);
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pci_disable_device(dev);
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}
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}
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@ -1089,6 +1146,8 @@ static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
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if (line)
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serial_txx9_suspend_port(line);
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pci_save_state(dev);
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pci_set_power_state(dev, pci_choose_state(dev, state));
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return 0;
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}
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@ -1096,8 +1155,13 @@ static int pciserial_txx9_resume_one(struct pci_dev *dev)
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{
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int line = (int)(long)pci_get_drvdata(dev);
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if (line)
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pci_set_power_state(dev, PCI_D0);
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pci_restore_state(dev);
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if (line) {
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pci_enable_device(dev);
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serial_txx9_resume_port(line);
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}
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return 0;
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}
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