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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-13 17:34:23 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-13 17:34:23 -0800
commitf90203e0cf0d5a8b027d511af318bb3db4758fe2 (patch)
treed2d9157331857b4220198e053e30ce3427c5140e /drivers/serial
parent33e563c1190c26b6bf61990c505cdcb5cdbba7e4 (diff)
parent719c91ccadd3ed26570dbb29d54166914832eee9 (diff)
Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc
* master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc: (61 commits) [POWERPC] Use udbg_early_init() on ppc32 [POWERPC] Open Firmware serial port driver [POWERPC] Move MPIC smp routines into mpic.c [POWERPC] Cleanup pseries kexec code [POWERPC] Cleanup pseries smp initialisation code [POWERPC] Consolidate pseries platform header files into pseries.h [POWERPC] 85xx: Drop use of SYNC macro in head_fsl_booke.S [POWERPC] cell: pm_rtas_activat_signals routine cleanup [POWERPC] cell: PPU Oprofile cleanup patch [POWERPC] spufs: avoid accessing kernel memory through mmapped /mem node [POWERPC] spu sched: static timeslicing for SCHED_RR contexts [POWERPC] spu sched: use DECLARE_BITMAP [POWERPC] spu sched: forced preemption at execution [POWERPC] spu sched: update some comments [POWERPC] spu sched: simplity spu_remove_from_active_list [POWERPC] spufs: optimize spu_run [POWERPC] spufs: runqueue simplification [POWERPC] spufs: move prio to spu_context [POWERPC] spufs: state_mutex cleanup [POWERPC] spufs: simplify state_mutex ...
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/Kconfig10
-rw-r--r--drivers/serial/Makefile1
-rw-r--r--drivers/serial/mpc52xx_uart.c5
-rw-r--r--drivers/serial/of_serial.c143
4 files changed, 156 insertions, 3 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 5cc6b91f840..d0edbaacb1f 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -999,4 +999,14 @@ config SERIAL_NETX_CONSOLE
If you have enabled the serial port on the Motorola IMX
CPU you can make it the console by answering Y to this option.
+config SERIAL_OF_PLATFORM
+ tristate "Serial port on Open Firmware platform bus"
+ depends on PPC_OF
+ depends on SERIAL_8250
+ help
+ If you have a PowerPC based system that has serial ports
+ on a platform specific bus, you should enable this option.
+ Currently, only 8250 compatible ports are supported, but
+ others can easily be added.
+
endmenu
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index df3632cd7df..f3f82587b5f 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -58,3 +58,4 @@ 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
+obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 3c4b6c24371..955bbd653e2 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -127,8 +127,7 @@ static irqreturn_t mpc52xx_uart_int(int irq,void *dev_id);
#if defined(CONFIG_PPC_MERGE)
static struct of_device_id mpc52xx_uart_of_match[] = {
- { .type = "serial", .compatible = "mpc52xx-psc-uart", },
- { .type = "serial", .compatible = "mpc5200-psc", }, /* Efika only! */
+ { .type = "serial", .compatible = "mpc5200-psc-uart", },
{},
};
#endif
@@ -1068,7 +1067,7 @@ mpc52xx_uart_of_enumerate(void)
continue;
/* Is a particular device number requested? */
- devno = get_property(np, "device_no", NULL);
+ devno = get_property(np, "port-number", NULL);
mpc52xx_uart_of_assign(of_node_get(np), devno ? *devno : -1);
}
diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c
new file mode 100644
index 00000000000..09b0b736a75
--- /dev/null
+++ b/drivers/serial/of_serial.c
@@ -0,0 +1,143 @@
+/*
+ * Serial Port driver for Open Firmware platform devices
+ *
+ * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp.
+ *
+ * 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.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/serial_core.h>
+#include <linux/serial_8250.h>
+
+#include <asm/of_platform.h>
+#include <asm/prom.h>
+
+/*
+ * Fill a struct uart_port for a given device node
+ */
+static int __devinit of_platform_serial_setup(struct of_device *ofdev,
+ int type, struct uart_port *port)
+{
+ struct resource resource;
+ struct device_node *np = ofdev->node;
+ const unsigned int *clk, *spd;
+ int ret;
+
+ memset(port, 0, sizeof *port);
+ spd = get_property(np, "current-speed", NULL);
+ clk = get_property(np, "clock-frequency", NULL);
+ if (!clk) {
+ dev_warn(&ofdev->dev, "no clock-frequency property set\n");
+ return -ENODEV;
+ }
+
+ ret = of_address_to_resource(np, 0, &resource);
+ if (ret) {
+ dev_warn(&ofdev->dev, "invalid address\n");
+ return ret;
+ }
+
+ spin_lock_init(&port->lock);
+ port->mapbase = resource.start;
+ port->irq = irq_of_parse_and_map(np, 0);
+ port->iotype = UPIO_MEM;
+ port->type = type;
+ port->uartclk = *clk;
+ port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP;
+ port->dev = &ofdev->dev;
+ port->custom_divisor = *clk / (16 * (*spd));
+
+ return 0;
+}
+
+/*
+ * Try to register a serial port
+ */
+static int __devinit of_platform_serial_probe(struct of_device *ofdev,
+ const struct of_device_id *id)
+{
+ struct uart_port port;
+ int port_type;
+ int ret;
+
+ if (of_find_property(ofdev->node, "used-by-rtas", NULL))
+ return -EBUSY;
+
+ port_type = (unsigned long)id->data;
+ ret = of_platform_serial_setup(ofdev, port_type, &port);
+ if (ret)
+ goto out;
+
+ switch (port_type) {
+ case PORT_UNKNOWN:
+ dev_info(&ofdev->dev, "Unknown serial port found, "
+ "attempting to use 8250 driver\n");
+ /* fallthrough */
+ case PORT_8250 ... PORT_MAX_8250:
+ ret = serial8250_register_port(&port);
+ break;
+ default:
+ /* need to add code for these */
+ ret = -ENODEV;
+ break;
+ }
+ if (ret < 0)
+ goto out;
+
+ ofdev->dev.driver_data = (void *)(unsigned long)ret;
+ return 0;
+out:
+ irq_dispose_mapping(port.irq);
+ return ret;
+}
+
+/*
+ * Release a line
+ */
+static int of_platform_serial_remove(struct of_device *ofdev)
+{
+ int line = (unsigned long)ofdev->dev.driver_data;
+ serial8250_unregister_port(line);
+ return 0;
+}
+
+/*
+ * A few common types, add more as needed.
+ */
+static struct of_device_id __devinitdata of_platform_serial_table[] = {
+ { .type = "serial", .compatible = "ns8250", .data = (void *)PORT_8250, },
+ { .type = "serial", .compatible = "ns16450", .data = (void *)PORT_16450, },
+ { .type = "serial", .compatible = "ns16550", .data = (void *)PORT_16550, },
+ { .type = "serial", .compatible = "ns16750", .data = (void *)PORT_16750, },
+ { .type = "serial", .data = (void *)PORT_UNKNOWN, },
+ { /* end of list */ },
+};
+
+static struct of_platform_driver __devinitdata of_platform_serial_driver = {
+ .owner = THIS_MODULE,
+ .name = "of_serial",
+ .probe = of_platform_serial_probe,
+ .remove = of_platform_serial_remove,
+ .match_table = of_platform_serial_table,
+};
+
+static int __init of_platform_serial_init(void)
+{
+ return of_register_platform_driver(&of_platform_serial_driver);
+}
+module_init(of_platform_serial_init);
+
+static void __exit of_platform_serial_exit(void)
+{
+ return of_unregister_platform_driver(&of_platform_serial_driver);
+};
+module_exit(of_platform_serial_exit);
+
+MODULE_AUTHOR("Arnd Bergmann <arnd@arndb.de>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Serial Port driver for Open Firmware platform devices");