A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 03:01:39 -04:00
Code Issues Projects Releases Packages Wiki Activity

sh-sci: Extend sh-sci driver with early console V2

Browse source 
This is V2 of early serial console support for the sh-sci
driver. The early serial console is using early platform
devices and "earlyprintk". To use this feature the early
platform devices must be broken out to one device per port
and the desired port should be selected on the kernel command
line like: "earlyprintk=sh-sci.N[,baudrate][,keep]"

Signed-off-by: Magnus Damm <[email protected]>
Signed-off-by: Paul Mundt <[email protected]>
This commit is contained in:
Magnus Damm 2009-12-14 10:24:42 +00:00 • committed by Paul Mundt
commit 7b6fd3bf82
3 changed files with 49 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

54
drivers/serial/sh-sci.c
View file

@ -1043,10 +1043,14 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->port.iotype = UPIO_MEM;
sci_port->port.line = index;
sci_port->port.fifosize = 1;
sci_port->iclk = p->clk ? clk_get(&dev->dev, p->clk) : NULL;
sci_port->dclk = clk_get(&dev->dev, "peripheral_clk");
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
if (dev) {
sci_port->iclk = p->clk ? clk_get(&dev->dev, p->clk) : NULL;
sci_port->dclk = clk_get(&dev->dev, "peripheral_clk");
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
sci_port->port.dev = &dev->dev;
}
sci_port->break_timer.data = (unsigned long)sci_port;
sci_port->break_timer.function = sci_break_timer;
@ -1057,7 +1061,6 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->port.irq = p->irqs[SCIx_TXI_IRQ];
sci_port->port.flags = p->flags;
sci_port->port.dev = &dev->dev;
sci_port->type = sci_port->port.type = p->type;
memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs));
@ -1101,7 +1104,7 @@ static void serial_console_write(struct console *co, const char *s,
sci_port->disable(port);
}
static int __init serial_console_setup(struct console *co, char *options)
static int __devinit serial_console_setup(struct console *co, char *options)
{
struct sci_port *sci_port;
struct uart_port *port;
@ -1119,9 +1122,14 @@ static int __init serial_console_setup(struct console *co, char *options)
if (co->index >= SCI_NPORTS)
co->index = 0;
sci_port = &sci_ports[co->index];
port = &sci_port->port;
co->data = port;
if (co->data) {
port = co->data;
sci_port = to_sci_port(port);
} else {
sci_port = &sci_ports[co->index];
port = &sci_port->port;
co->data = port;
}
/*
* Also need to check port->type, we don't actually have any
@ -1165,6 +1173,15 @@ static int __init sci_console_init(void)
return 0;
}
console_initcall(sci_console_init);
static struct sci_port early_serial_port;
static struct console early_serial_console = {
.name = "early_ttySC",
.write = serial_console_write,
.flags = CON_PRINTBUFFER,
};
static char early_serial_buf[32];
#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
@ -1250,6 +1267,21 @@ static int __devinit sci_probe(struct platform_device *dev)
struct sh_sci_priv *priv;
int i, ret = -EINVAL;
#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
if (is_early_platform_device(dev)) {
if (dev->id == -1)
return -ENOTSUPP;
early_serial_console.index = dev->id;
early_serial_console.data = &early_serial_port.port;
sci_init_single(NULL, &early_serial_port, dev->id, p);
serial_console_setup(&early_serial_console, early_serial_buf);
if (!strstr(early_serial_buf, "keep"))
early_serial_console.flags |= CON_BOOT;
register_console(&early_serial_console);
return 0;
}
#endif
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
@ -1349,6 +1381,10 @@ static void __exit sci_exit(void)
uart_unregister_driver(&sci_uart_driver);
}
#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
early_platform_init_buffer("earlyprintk", &sci_driver,
early_serial_buf, ARRAY_SIZE(early_serial_buf));
#endif
module_init(sci_init);
module_exit(sci_exit);