mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 14:06:39 +07:00
serial: remove NWP serial support
The NWP serial driver is no longer needed, as the two users of this hardware have migrated to a much faster generation hardware, see https://en.wikipedia.org/wiki/QPACE2 for the replacement. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Krill <ben@codiert.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann
Greg Kroah-Hartman
parent
3ac4ae4736
commit
d1b5c87fa8
@ -1099,7 +1099,7 @@ config SERIAL_NETX_CONSOLE
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config SERIAL_OF_PLATFORM
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tristate "Serial port on Open Firmware platform bus"
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depends on OF
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depends on SERIAL_8250 || SERIAL_OF_PLATFORM_NWPSERIAL
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depends on SERIAL_8250
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help
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If you have a PowerPC based system that has serial ports
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on a platform specific bus, you should enable this option.
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@ -1133,23 +1133,6 @@ config SERIAL_OMAP_CONSOLE
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your boot loader about how to pass options to the kernel at
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boot time.)
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config SERIAL_OF_PLATFORM_NWPSERIAL
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tristate "NWP serial port driver"
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depends on PPC_DCR
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select SERIAL_OF_PLATFORM
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select SERIAL_CORE_CONSOLE
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select SERIAL_CORE
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help
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This driver supports the cell network processor nwp serial
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device.
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config SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE
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bool "Console on NWP serial port"
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depends on SERIAL_OF_PLATFORM_NWPSERIAL=y
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select SERIAL_CORE_CONSOLE
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help
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Support for Console on the NWP serial ports.
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config SERIAL_LANTIQ
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bool "Lantiq serial driver"
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depends on LANTIQ
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@ -64,7 +64,6 @@ obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o
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obj-$(CONFIG_SERIAL_MSM) += msm_serial.o
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obj-$(CONFIG_SERIAL_NETX) += netx-serial.o
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obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
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obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o
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obj-$(CONFIG_SERIAL_KGDB_NMI) += kgdb_nmi.o
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obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o
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obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o
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@ -1,477 +0,0 @@
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/*
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* Serial Port driver for a NWP uart device
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*
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* Copyright (C) 2008 IBM Corp., Benjamin Krill <ben@codiert.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/console.h>
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#include <linux/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_core.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/irqreturn.h>
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#include <linux/mutex.h>
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#include <linux/of_platform.h>
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#include <linux/of_device.h>
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#include <linux/nwpserial.h>
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#include <linux/delay.h>
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#include <asm/prom.h>
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#include <asm/dcr.h>
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#define NWPSERIAL_NR 2
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#define NWPSERIAL_STATUS_RXVALID 0x1
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#define NWPSERIAL_STATUS_TXFULL 0x2
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struct nwpserial_port {
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struct uart_port port;
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dcr_host_t dcr_host;
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unsigned int ier;
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unsigned int mcr;
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};
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static DEFINE_MUTEX(nwpserial_mutex);
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static struct nwpserial_port nwpserial_ports[NWPSERIAL_NR];
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static void wait_for_bits(struct nwpserial_port *up, int bits)
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{
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unsigned int status, tmout = 10000;
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/* Wait up to 10ms for the character(s) to be sent. */
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do {
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status = dcr_read(up->dcr_host, UART_LSR);
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if (--tmout == 0)
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break;
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udelay(1);
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} while ((status & bits) != bits);
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}
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#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE
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static void nwpserial_console_putchar(struct uart_port *port, int c)
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{
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struct nwpserial_port *up;
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up = container_of(port, struct nwpserial_port, port);
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/* check if tx buffer is full */
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wait_for_bits(up, UART_LSR_THRE);
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dcr_write(up->dcr_host, UART_TX, c);
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up->port.icount.tx++;
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}
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static void
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nwpserial_console_write(struct console *co, const char *s, unsigned int count)
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{
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struct nwpserial_port *up = &nwpserial_ports[co->index];
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unsigned long flags;
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int locked = 1;
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if (oops_in_progress)
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locked = spin_trylock_irqsave(&up->port.lock, flags);
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else
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spin_lock_irqsave(&up->port.lock, flags);
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/* save and disable interrupt */
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up->ier = dcr_read(up->dcr_host, UART_IER);
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dcr_write(up->dcr_host, UART_IER, up->ier & ~UART_IER_RDI);
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uart_console_write(&up->port, s, count, nwpserial_console_putchar);
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/* wait for transmitter to become empty */
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while ((dcr_read(up->dcr_host, UART_LSR) & UART_LSR_THRE) == 0)
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cpu_relax();
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/* restore interrupt state */
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dcr_write(up->dcr_host, UART_IER, up->ier);
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if (locked)
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spin_unlock_irqrestore(&up->port.lock, flags);
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}
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static struct uart_driver nwpserial_reg;
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static struct console nwpserial_console = {
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.name = "ttySQ",
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.write = nwpserial_console_write,
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.device = uart_console_device,
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.flags = CON_PRINTBUFFER,
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.index = -1,
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.data = &nwpserial_reg,
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};
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#define NWPSERIAL_CONSOLE (&nwpserial_console)
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#else
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#define NWPSERIAL_CONSOLE NULL
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#endif /* CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE */
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/**************************************************************************/
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static int nwpserial_request_port(struct uart_port *port)
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{
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return 0;
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}
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static void nwpserial_release_port(struct uart_port *port)
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{
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/* N/A */
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}
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static void nwpserial_config_port(struct uart_port *port, int flags)
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{
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port->type = PORT_NWPSERIAL;
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}
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static irqreturn_t nwpserial_interrupt(int irq, void *dev_id)
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{
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struct nwpserial_port *up = dev_id;
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struct tty_port *port = &up->port.state->port;
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irqreturn_t ret;
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unsigned int iir;
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unsigned char ch;
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spin_lock(&up->port.lock);
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/* check if the uart was the interrupt source. */
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iir = dcr_read(up->dcr_host, UART_IIR);
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if (!iir) {
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ret = IRQ_NONE;
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goto out;
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}
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do {
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up->port.icount.rx++;
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ch = dcr_read(up->dcr_host, UART_RX);
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if (up->port.ignore_status_mask != NWPSERIAL_STATUS_RXVALID)
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tty_insert_flip_char(port, ch, TTY_NORMAL);
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} while (dcr_read(up->dcr_host, UART_LSR) & UART_LSR_DR);
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spin_unlock(&up->port.lock);
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tty_flip_buffer_push(port);
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spin_lock(&up->port.lock);
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ret = IRQ_HANDLED;
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/* clear interrupt */
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dcr_write(up->dcr_host, UART_IIR, 1);
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out:
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spin_unlock(&up->port.lock);
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return ret;
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}
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static int nwpserial_startup(struct uart_port *port)
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{
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struct nwpserial_port *up;
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int err;
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up = container_of(port, struct nwpserial_port, port);
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/* disable flow control by default */
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up->mcr = dcr_read(up->dcr_host, UART_MCR) & ~UART_MCR_AFE;
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dcr_write(up->dcr_host, UART_MCR, up->mcr);
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/* register interrupt handler */
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err = request_irq(up->port.irq, nwpserial_interrupt,
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IRQF_SHARED, "nwpserial", up);
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if (err)
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return err;
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/* enable interrupts */
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up->ier = UART_IER_RDI;
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dcr_write(up->dcr_host, UART_IER, up->ier);
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/* enable receiving */
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up->port.ignore_status_mask &= ~NWPSERIAL_STATUS_RXVALID;
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return 0;
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}
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static void nwpserial_shutdown(struct uart_port *port)
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{
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struct nwpserial_port *up;
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up = container_of(port, struct nwpserial_port, port);
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/* disable receiving */
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up->port.ignore_status_mask |= NWPSERIAL_STATUS_RXVALID;
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/* disable interrupts from this port */
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up->ier = 0;
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dcr_write(up->dcr_host, UART_IER, up->ier);
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/* free irq */
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free_irq(up->port.irq, up);
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}
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static int nwpserial_verify_port(struct uart_port *port,
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struct serial_struct *ser)
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{
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return -EINVAL;
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}
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static const char *nwpserial_type(struct uart_port *port)
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{
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return port->type == PORT_NWPSERIAL ? "nwpserial" : NULL;
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}
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static void nwpserial_set_termios(struct uart_port *port,
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struct ktermios *termios, struct ktermios *old)
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{
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struct nwpserial_port *up;
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up = container_of(port, struct nwpserial_port, port);
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up->port.read_status_mask = NWPSERIAL_STATUS_RXVALID
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up->port.ignore_status_mask = 0;
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/* ignore all characters if CREAD is not set */
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if ((termios->c_cflag & CREAD) == 0)
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up->port.ignore_status_mask |= NWPSERIAL_STATUS_RXVALID;
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/* Copy back the old hardware settings */
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if (old)
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tty_termios_copy_hw(termios, old);
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}
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static void nwpserial_break_ctl(struct uart_port *port, int ctl)
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{
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/* N/A */
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}
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static void nwpserial_stop_rx(struct uart_port *port)
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{
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struct nwpserial_port *up;
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up = container_of(port, struct nwpserial_port, port);
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/* don't forward any more data (like !CREAD) */
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up->port.ignore_status_mask = NWPSERIAL_STATUS_RXVALID;
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}
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static void nwpserial_putchar(struct nwpserial_port *up, unsigned char c)
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{
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/* check if tx buffer is full */
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wait_for_bits(up, UART_LSR_THRE);
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dcr_write(up->dcr_host, UART_TX, c);
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up->port.icount.tx++;
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}
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static void nwpserial_start_tx(struct uart_port *port)
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{
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struct nwpserial_port *up;
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struct circ_buf *xmit;
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up = container_of(port, struct nwpserial_port, port);
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xmit = &up->port.state->xmit;
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if (port->x_char) {
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nwpserial_putchar(up, up->port.x_char);
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port->x_char = 0;
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}
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while (!(uart_circ_empty(xmit) || uart_tx_stopped(&up->port))) {
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nwpserial_putchar(up, xmit->buf[xmit->tail]);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
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}
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}
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static unsigned int nwpserial_get_mctrl(struct uart_port *port)
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{
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return 0;
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}
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static void nwpserial_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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/* N/A */
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}
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static void nwpserial_stop_tx(struct uart_port *port)
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{
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/* N/A */
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}
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static unsigned int nwpserial_tx_empty(struct uart_port *port)
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{
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struct nwpserial_port *up;
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unsigned long flags;
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int ret;
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up = container_of(port, struct nwpserial_port, port);
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spin_lock_irqsave(&up->port.lock, flags);
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ret = dcr_read(up->dcr_host, UART_LSR);
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spin_unlock_irqrestore(&up->port.lock, flags);
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return ret & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
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}
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static struct uart_ops nwpserial_pops = {
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.tx_empty = nwpserial_tx_empty,
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.set_mctrl = nwpserial_set_mctrl,
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.get_mctrl = nwpserial_get_mctrl,
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.stop_tx = nwpserial_stop_tx,
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.start_tx = nwpserial_start_tx,
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.stop_rx = nwpserial_stop_rx,
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.break_ctl = nwpserial_break_ctl,
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.startup = nwpserial_startup,
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.shutdown = nwpserial_shutdown,
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.set_termios = nwpserial_set_termios,
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.type = nwpserial_type,
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.release_port = nwpserial_release_port,
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.request_port = nwpserial_request_port,
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.config_port = nwpserial_config_port,
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.verify_port = nwpserial_verify_port,
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};
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static struct uart_driver nwpserial_reg = {
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.owner = THIS_MODULE,
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.driver_name = "nwpserial",
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.dev_name = "ttySQ",
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.major = TTY_MAJOR,
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.minor = 68,
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.nr = NWPSERIAL_NR,
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.cons = NWPSERIAL_CONSOLE,
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};
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int nwpserial_register_port(struct uart_port *port)
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{
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struct nwpserial_port *up = NULL;
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int ret = -1;
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int i;
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static int first = 1;
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int dcr_len;
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int dcr_base;
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struct device_node *dn;
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mutex_lock(&nwpserial_mutex);
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dn = port->dev->of_node;
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if (dn == NULL)
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goto out;
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/* get dcr base. */
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dcr_base = dcr_resource_start(dn, 0);
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/* find matching entry */
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for (i = 0; i < NWPSERIAL_NR; i++)
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if (nwpserial_ports[i].port.iobase == dcr_base) {
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up = &nwpserial_ports[i];
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break;
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}
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/* we didn't find a mtching entry, search for a free port */
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if (up == NULL)
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for (i = 0; i < NWPSERIAL_NR; i++)
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if (nwpserial_ports[i].port.type == PORT_UNKNOWN &&
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nwpserial_ports[i].port.iobase == 0) {
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up = &nwpserial_ports[i];
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break;
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}
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if (up == NULL) {
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ret = -EBUSY;
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goto out;
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}
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if (first)
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uart_register_driver(&nwpserial_reg);
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first = 0;
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up->port.membase = port->membase;
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up->port.irq = port->irq;
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up->port.uartclk = port->uartclk;
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up->port.fifosize = port->fifosize;
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up->port.regshift = port->regshift;
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up->port.iotype = port->iotype;
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up->port.flags = port->flags;
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up->port.mapbase = port->mapbase;
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up->port.private_data = port->private_data;
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if (port->dev)
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up->port.dev = port->dev;
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if (up->port.iobase != dcr_base) {
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up->port.ops = &nwpserial_pops;
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up->port.fifosize = 16;
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spin_lock_init(&up->port.lock);
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up->port.iobase = dcr_base;
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dcr_len = dcr_resource_len(dn, 0);
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up->dcr_host = dcr_map(dn, dcr_base, dcr_len);
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if (!DCR_MAP_OK(up->dcr_host)) {
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printk(KERN_ERR "Cannot map DCR resources for NWPSERIAL");
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goto out;
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}
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}
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ret = uart_add_one_port(&nwpserial_reg, &up->port);
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if (ret == 0)
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ret = up->port.line;
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out:
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mutex_unlock(&nwpserial_mutex);
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return ret;
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}
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EXPORT_SYMBOL(nwpserial_register_port);
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void nwpserial_unregister_port(int line)
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{
|
||||
struct nwpserial_port *up = &nwpserial_ports[line];
|
||||
mutex_lock(&nwpserial_mutex);
|
||||
uart_remove_one_port(&nwpserial_reg, &up->port);
|
||||
|
||||
up->port.type = PORT_UNKNOWN;
|
||||
|
||||
mutex_unlock(&nwpserial_mutex);
|
||||
}
|
||||
EXPORT_SYMBOL(nwpserial_unregister_port);
|
||||
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE
|
||||
static int __init nwpserial_console_init(void)
|
||||
{
|
||||
struct nwpserial_port *up = NULL;
|
||||
struct device_node *dn;
|
||||
const char *name;
|
||||
int dcr_base;
|
||||
int dcr_len;
|
||||
int i;
|
||||
|
||||
/* search for a free port */
|
||||
for (i = 0; i < NWPSERIAL_NR; i++)
|
||||
if (nwpserial_ports[i].port.type == PORT_UNKNOWN) {
|
||||
up = &nwpserial_ports[i];
|
||||
break;
|
||||
}
|
||||
|
||||
if (up == NULL)
|
||||
return -1;
|
||||
|
||||
name = of_get_property(of_chosen, "linux,stdout-path", NULL);
|
||||
if (name == NULL)
|
||||
return -1;
|
||||
|
||||
dn = of_find_node_by_path(name);
|
||||
if (!dn)
|
||||
return -1;
|
||||
|
||||
spin_lock_init(&up->port.lock);
|
||||
up->port.ops = &nwpserial_pops;
|
||||
up->port.type = PORT_NWPSERIAL;
|
||||
up->port.fifosize = 16;
|
||||
|
||||
dcr_base = dcr_resource_start(dn, 0);
|
||||
dcr_len = dcr_resource_len(dn, 0);
|
||||
up->port.iobase = dcr_base;
|
||||
|
||||
up->dcr_host = dcr_map(dn, dcr_base, dcr_len);
|
||||
if (!DCR_MAP_OK(up->dcr_host)) {
|
||||
printk("Cannot map DCR resources for SERIAL");
|
||||
return -1;
|
||||
}
|
||||
register_console(&nwpserial_console);
|
||||
return 0;
|
||||
}
|
||||
console_initcall(nwpserial_console_init);
|
||||
#endif /* CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE */
|
||||
@ -215,11 +215,6 @@ static int of_platform_serial_probe(struct platform_device *ofdev)
|
||||
ret = serial8250_register_8250_port(&port8250);
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
|
||||
case PORT_NWPSERIAL:
|
||||
ret = nwpserial_register_port(&port);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
/* need to add code for these */
|
||||
@ -252,11 +247,6 @@ static int of_platform_serial_remove(struct platform_device *ofdev)
|
||||
case PORT_8250 ... PORT_MAX_8250:
|
||||
serial8250_unregister_port(info->line);
|
||||
break;
|
||||
#endif
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
|
||||
case PORT_NWPSERIAL:
|
||||
nwpserial_unregister_port(info->line);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
/* need to add code for these */
|
||||
@ -356,10 +346,6 @@ static const struct of_device_id of_platform_serial_table[] = {
|
||||
.data = (void *)PORT_XSCALE, },
|
||||
{ .compatible = "mrvl,pxa-uart",
|
||||
.data = (void *)PORT_XSCALE, },
|
||||
#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
|
||||
{ .compatible = "ibm,qpace-nwp-serial",
|
||||
.data = (void *)PORT_NWPSERIAL, },
|
||||
#endif
|
||||
{ /* end of list */ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, of_platform_serial_table);
|
||||
|
||||
@ -1,18 +0,0 @@
|
||||
/*
|
||||
* Serial Port driver for a NWP uart device
|
||||
*
|
||||
* Copyright (C) 2008 IBM Corp., Benjamin Krill <ben@codiert.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version
|
||||
* 2 of the License, or (at your option) any later version.
|
||||
*
|
||||
*/
|
||||
#ifndef _NWPSERIAL_H
|
||||
#define _NWPSERIAL_H
|
||||
|
||||
int nwpserial_register_port(struct uart_port *port);
|
||||
void nwpserial_unregister_port(int line);
|
||||
|
||||
#endif /* _NWPSERIAL_H */
|
||||
@ -176,7 +176,7 @@
|
||||
|
||||
#define PORT_S3C6400 84
|
||||
|
||||
/* NWPSERIAL */
|
||||
/* NWPSERIAL, now removed */
|
||||
#define PORT_NWPSERIAL 85
|
||||
|
||||
/* MAX3100 */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user