linux/drivers/tty/serial/8250_hp300.c

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/*
* Driver for the 98626/98644/internal serial interface on hp300/hp400
* (based on the National Semiconductor INS8250/NS16550AF/WD16C552 UARTs)
*
* Ported from 2.2 and modified to use the normal 8250 driver
* by Kars de Jong <jongk@linux-m68k.org>, May 2004.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/delay.h>
#include <linux/dio.h>
#include <linux/console.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <asm/io.h>
#include "8250.h"
#if !defined(CONFIG_HPDCA) && !defined(CONFIG_HPAPCI)
#warning CONFIG_8250 defined but neither CONFIG_HPDCA nor CONFIG_HPAPCI defined, are you sure?
#endif
#ifdef CONFIG_HPAPCI
struct hp300_port
{
struct hp300_port *next; /* next port */
int line; /* line (tty) number */
};
static struct hp300_port *hp300_ports;
#endif
#ifdef CONFIG_HPDCA
static int __devinit hpdca_init_one(struct dio_dev *d,
const struct dio_device_id *ent);
static void __devexit hpdca_remove_one(struct dio_dev *d);
static struct dio_device_id hpdca_dio_tbl[] = {
{ DIO_ID_DCA0 },
{ DIO_ID_DCA0REM },
{ DIO_ID_DCA1 },
{ DIO_ID_DCA1REM },
{ 0 }
};
static struct dio_driver hpdca_driver = {
.name = "hpdca",
.id_table = hpdca_dio_tbl,
.probe = hpdca_init_one,
.remove = __devexit_p(hpdca_remove_one),
};
#endif
static unsigned int num_ports;
extern int hp300_uart_scode;
/* Offset to UART registers from base of DCA */
#define UART_OFFSET 17
#define DCA_ID 0x01 /* ID (read), reset (write) */
#define DCA_IC 0x03 /* Interrupt control */
/* Interrupt control */
#define DCA_IC_IE 0x80 /* Master interrupt enable */
#define HPDCA_BAUD_BASE 153600
/* Base address of the Frodo part */
#define FRODO_BASE (0x41c000)
/*
* Where we find the 8250-like APCI ports, and how far apart they are.
*/
#define FRODO_APCIBASE 0x0
#define FRODO_APCISPACE 0x20
#define FRODO_APCI_OFFSET(x) (FRODO_APCIBASE + ((x) * FRODO_APCISPACE))
#define HPAPCI_BAUD_BASE 500400
#ifdef CONFIG_SERIAL_8250_CONSOLE
/*
* Parse the bootinfo to find descriptions for headless console and
* debug serial ports and register them with the 8250 driver.
* This function should be called before serial_console_init() is called
* to make sure the serial console will be available for use. IA-64 kernel
* calls this function from setup_arch() after the EFI and ACPI tables have
* been parsed.
*/
int __init hp300_setup_serial_console(void)
{
int scode;
struct uart_port port;
memset(&port, 0, sizeof(port));
if (hp300_uart_scode < 0 || hp300_uart_scode > DIO_SCMAX)
return 0;
if (DIO_SCINHOLE(hp300_uart_scode))
return 0;
scode = hp300_uart_scode;
/* Memory mapped I/O */
port.iotype = UPIO_MEM;
port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
port.type = PORT_UNKNOWN;
/* Check for APCI console */
if (scode == 256) {
#ifdef CONFIG_HPAPCI
printk(KERN_INFO "Serial console is HP APCI 1\n");
port.uartclk = HPAPCI_BAUD_BASE * 16;
port.mapbase = (FRODO_BASE + FRODO_APCI_OFFSET(1));
port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
port.regshift = 2;
add_preferred_console("ttyS", port.line, "9600n8");
#else
printk(KERN_WARNING "Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n");
return 0;
#endif
} else {
#ifdef CONFIG_HPDCA
unsigned long pa = dio_scodetophysaddr(scode);
if (!pa)
return 0;
printk(KERN_INFO "Serial console is HP DCA at select code %d\n", scode);
port.uartclk = HPDCA_BAUD_BASE * 16;
port.mapbase = (pa + UART_OFFSET);
port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
port.regshift = 1;
port.irq = DIO_IPL(pa + DIO_VIRADDRBASE);
/* Enable board-interrupts */
out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80)
add_preferred_console("ttyS", port.line, "9600n8");
#else
printk(KERN_WARNING "Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n");
return 0;
#endif
}
if (early_serial_setup(&port) < 0)
printk(KERN_WARNING "hp300_setup_serial_console(): early_serial_setup() failed.\n");
return 0;
}
#endif /* CONFIG_SERIAL_8250_CONSOLE */
#ifdef CONFIG_HPDCA
static int __devinit hpdca_init_one(struct dio_dev *d,
const struct dio_device_id *ent)
{
struct uart_port port;
int line;
#ifdef CONFIG_SERIAL_8250_CONSOLE
if (hp300_uart_scode == d->scode) {
/* Already got it. */
return 0;
}
#endif
memset(&port, 0, sizeof(struct uart_port));
/* Memory mapped I/O */
port.iotype = UPIO_MEM;
port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
port.irq = d->ipl;
port.uartclk = HPDCA_BAUD_BASE * 16;
port.mapbase = (d->resource.start + UART_OFFSET);
port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
port.regshift = 1;
port.dev = &d->dev;
line = serial8250_register_port(&port);
if (line < 0) {
printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d"
" irq %d failed\n", d->scode, port.irq);
return -ENOMEM;
}
/* Enable board-interrupts */
out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
dio_set_drvdata(d, (void *)line);
/* Reset the DCA */
out_8(d->resource.start + DIO_VIRADDRBASE + DCA_ID, 0xff);
udelay(100);
num_ports++;
return 0;
}
#endif
static int __init hp300_8250_init(void)
{
static int called;
#ifdef CONFIG_HPAPCI
int line;
unsigned long base;
struct uart_port uport;
struct hp300_port *port;
int i;
#endif
if (called)
return -ENODEV;
called = 1;
if (!MACH_IS_HP300)
return -ENODEV;
#ifdef CONFIG_HPDCA
dio_register_driver(&hpdca_driver);
#endif
#ifdef CONFIG_HPAPCI
if (hp300_model < HP_400) {
if (!num_ports)
return -ENODEV;
return 0;
}
/* These models have the Frodo chip.
* Port 0 is reserved for the Apollo Domain keyboard.
* Port 1 is either the console or the DCA.
*/
for (i = 1; i < 4; i++) {
/* Port 1 is the console on a 425e, on other machines it's
* mapped to DCA.
*/
#ifdef CONFIG_SERIAL_8250_CONSOLE
if (i == 1)
continue;
#endif
/* Create new serial device */
port = kmalloc(sizeof(struct hp300_port), GFP_KERNEL);
if (!port)
return -ENOMEM;
memset(&uport, 0, sizeof(struct uart_port));
base = (FRODO_BASE + FRODO_APCI_OFFSET(i));
/* Memory mapped I/O */
uport.iotype = UPIO_MEM;
uport.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \
| UPF_BOOT_AUTOCONF;
/* XXX - no interrupt support yet */
uport.irq = 0;
uport.uartclk = HPAPCI_BAUD_BASE * 16;
uport.mapbase = base;
uport.membase = (char *)(base + DIO_VIRADDRBASE);
uport.regshift = 2;
line = serial8250_register_port(&uport);
if (line < 0) {
printk(KERN_NOTICE "8250_hp300: register_serial() APCI"
" %d irq %d failed\n", i, uport.irq);
kfree(port);
continue;
}
port->line = line;
port->next = hp300_ports;
hp300_ports = port;
num_ports++;
}
#endif
/* Any boards found? */
if (!num_ports)
return -ENODEV;
return 0;
}
#ifdef CONFIG_HPDCA
static void __devexit hpdca_remove_one(struct dio_dev *d)
{
int line;
line = (int) dio_get_drvdata(d);
if (d->resource.start) {
/* Disable board-interrupts */
out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, 0);
}
serial8250_unregister_port(line);
}
#endif
static void __exit hp300_8250_exit(void)
{
#ifdef CONFIG_HPAPCI
struct hp300_port *port, *to_free;
for (port = hp300_ports; port; ) {
serial8250_unregister_port(port->line);
to_free = port;
port = port->next;
kfree(to_free);
}
hp300_ports = NULL;
#endif
#ifdef CONFIG_HPDCA
dio_unregister_driver(&hpdca_driver);
#endif
}
module_init(hp300_8250_init);
module_exit(hp300_8250_exit);
MODULE_DESCRIPTION("HP DCA/APCI serial driver");
MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
MODULE_LICENSE("GPL");