[net-next-2.6.git] / drivers / serial / 8250_hp300.c

/*
 * 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 <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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Driver for the 98626/98644/internal serial interface on hp300/hp400
	3	* (based on the National Semiconductor INS8250/NS16550AF/WD16C552 UARTs)
	4	*
	5	* Ported from 2.2 and modified to use the normal 8250 driver
	6	* by Kars de Jong <jongk@linux-m68k.org>, May 2004.
	7	*/
	8	#include <linux/module.h>
	9	#include <linux/init.h>
	10	#include <linux/string.h>
	11	#include <linux/kernel.h>
1da177e4	12	#include <linux/serial.h>
1da177e4	13	#include <linux/serial_core.h>
b187f180	14	#include <linux/serial_8250.h>
1da177e4 LT	15	#include <linux/delay.h>
	16	#include <linux/dio.h>
	17	#include <linux/console.h>
5a0e3ad6	18	#include <linux/slab.h>
1da177e4 LT	19	#include <asm/io.h>
1da177e4 LT	20
2b49abac RK	21	#include "8250.h"
2b49abac RK	22
1da177e4 LT	23	#if !defined(CONFIG_HPDCA) && !defined(CONFIG_HPAPCI)
	24	#warning CONFIG_8250 defined but neither CONFIG_HPDCA nor CONFIG_HPAPCI defined, are you sure?
	25	#endif
	26
	27	#ifdef CONFIG_HPAPCI
	28	struct hp300_port
	29	{
	30	struct hp300_port next; / next port */
	31	int line; /* line (tty) number */
	32	};
	33
	34	static struct hp300_port *hp300_ports;
	35	#endif
	36
	37	#ifdef CONFIG_HPDCA
	38
	39	static int __devinit hpdca_init_one(struct dio_dev *d,
0fe1c137	40	const struct dio_device_id *ent);
1da177e4 LT	41	static void __devexit hpdca_remove_one(struct dio_dev *d);
	42
	43	static struct dio_device_id hpdca_dio_tbl[] = {
	44	{ DIO_ID_DCA0 },
	45	{ DIO_ID_DCA0REM },
	46	{ DIO_ID_DCA1 },
	47	{ DIO_ID_DCA1REM },
	48	{ 0 }
	49	};
	50
	51	static struct dio_driver hpdca_driver = {
	52	.name = "hpdca",
	53	.id_table = hpdca_dio_tbl,
	54	.probe = hpdca_init_one,
	55	.remove = __devexit_p(hpdca_remove_one),
	56	};
	57
	58	#endif
	59
e51c01b0 BH	60	static unsigned int num_ports;
e51c01b0 BH	61
1da177e4 LT	62	extern int hp300_uart_scode;
	63
	64	/* Offset to UART registers from base of DCA */
	65	#define UART_OFFSET 17
	66
	67	#define DCA_ID 0x01 /* ID (read), reset (write) */
	68	#define DCA_IC 0x03 /* Interrupt control */
	69
	70	/* Interrupt control */
	71	#define DCA_IC_IE 0x80 /* Master interrupt enable */
	72
	73	#define HPDCA_BAUD_BASE 153600
	74
	75	/* Base address of the Frodo part */
	76	#define FRODO_BASE (0x41c000)
	77
	78	/*
	79	* Where we find the 8250-like APCI ports, and how far apart they are.
	80	*/
	81	#define FRODO_APCIBASE 0x0
	82	#define FRODO_APCISPACE 0x20
	83	#define FRODO_APCI_OFFSET(x) (FRODO_APCIBASE + ((x) * FRODO_APCISPACE))
	84
	85	#define HPAPCI_BAUD_BASE 500400
	86
	87	#ifdef CONFIG_SERIAL_8250_CONSOLE
	88	/*
0fe1c137	89	* Parse the bootinfo to find descriptions for headless console and
1da177e4 LT	90	* debug serial ports and register them with the 8250 driver.
	91	* This function should be called before serial_console_init() is called
	92	* to make sure the serial console will be available for use. IA-64 kernel
	93	* calls this function from setup_arch() after the EFI and ACPI tables have
	94	* been parsed.
	95	*/
	96	int __init hp300_setup_serial_console(void)
	97	{
	98	int scode;
	99	struct uart_port port;
	100
	101	memset(&port, 0, sizeof(port));
	102
	103	if (hp300_uart_scode < 0 \|\| hp300_uart_scode > DIO_SCMAX)
	104	return 0;
	105
	106	if (DIO_SCINHOLE(hp300_uart_scode))
	107	return 0;
	108
	109	scode = hp300_uart_scode;
	110
	111	/* Memory mapped I/O */
	112	port.iotype = UPIO_MEM;
	113	port.flags = UPF_SKIP_TEST \| UPF_SHARE_IRQ \| UPF_BOOT_AUTOCONF;
	114	port.type = PORT_UNKNOWN;
	115
	116	/* Check for APCI console */
	117	if (scode == 256) {
	118	#ifdef CONFIG_HPAPCI
	119	printk(KERN_INFO "Serial console is HP APCI 1\n");
	120
	121	port.uartclk = HPAPCI_BAUD_BASE * 16;
	122	port.mapbase = (FRODO_BASE + FRODO_APCI_OFFSET(1));
	123	port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
	124	port.regshift = 2;
	125	add_preferred_console("ttyS", port.line, "9600n8");
	126	#else
	127	printk(KERN_WARNING "Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n");
	128	return 0;
	129	#endif
0fe1c137	130	} else {
1da177e4 LT	131	#ifdef CONFIG_HPDCA
1da177e4 LT	132	unsigned long pa = dio_scodetophysaddr(scode);
0fe1c137	133	if (!pa)
1da177e4	134	return 0;
1da177e4 LT	135
	136	printk(KERN_INFO "Serial console is HP DCA at select code %d\n", scode);
	137
	138	port.uartclk = HPDCA_BAUD_BASE * 16;
	139	port.mapbase = (pa + UART_OFFSET);
	140	port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
	141	port.regshift = 1;
	142	port.irq = DIO_IPL(pa + DIO_VIRADDRBASE);
	143
	144	/* Enable board-interrupts */
	145	out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
	146
0fe1c137	147	if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80)
1da177e4	148	add_preferred_console("ttyS", port.line, "9600n8");
1da177e4 LT	149	#else
	150	printk(KERN_WARNING "Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n");
	151	return 0;
	152	#endif
	153	}
	154
0fe1c137	155	if (early_serial_setup(&port) < 0)
1da177e4	156	printk(KERN_WARNING "hp300_setup_serial_console(): early_serial_setup() failed.\n");
1da177e4 LT	157	return 0;
	158	}
	159	#endif /* CONFIG_SERIAL_8250_CONSOLE */
	160
	161	#ifdef CONFIG_HPDCA
	162	static int __devinit hpdca_init_one(struct dio_dev *d,
0fe1c137	163	const struct dio_device_id *ent)
1da177e4	164	{
2b49abac	165	struct uart_port port;
1da177e4 LT	166	int line;
	167
	168	#ifdef CONFIG_SERIAL_8250_CONSOLE
	169	if (hp300_uart_scode == d->scode) {
	170	/* Already got it. */
	171	return 0;
	172	}
	173	#endif
2b49abac	174	memset(&port, 0, sizeof(struct uart_port));
1da177e4 LT	175
1da177e4 LT	176	/* Memory mapped I/O */
2b49abac RK	177	port.iotype = UPIO_MEM;
	178	port.flags = UPF_SKIP_TEST \| UPF_SHARE_IRQ \| UPF_BOOT_AUTOCONF;
	179	port.irq = d->ipl;
	180	port.uartclk = HPDCA_BAUD_BASE * 16;
	181	port.mapbase = (d->resource.start + UART_OFFSET);
	182	port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
	183	port.regshift = 1;
	184	port.dev = &d->dev;
	185	line = serial8250_register_port(&port);
1da177e4 LT	186
	187	if (line < 0) {
	188	printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d"
2b49abac	189	" irq %d failed\n", d->scode, port.irq);
1da177e4 LT	190	return -ENOMEM;
	191	}
	192
	193	/* Enable board-interrupts */
	194	out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
	195	dio_set_drvdata(d, (void *)line);
	196
	197	/* Reset the DCA */
	198	out_8(d->resource.start + DIO_VIRADDRBASE + DCA_ID, 0xff);
	199	udelay(100);
	200
e51c01b0 BH	201	num_ports++;
e51c01b0 BH	202
1da177e4 LT	203	return 0;
	204	}
	205	#endif
	206
	207	static int __init hp300_8250_init(void)
	208	{
0fe1c137	209	static int called;
1da177e4 LT	210	#ifdef CONFIG_HPAPCI
	211	int line;
	212	unsigned long base;
2b49abac	213	struct uart_port uport;
1da177e4 LT	214	struct hp300_port *port;
	215	int i;
	216	#endif
	217	if (called)
	218	return -ENODEV;
	219	called = 1;
	220
	221	if (!MACH_IS_HP300)
	222	return -ENODEV;
	223
1da177e4	224	#ifdef CONFIG_HPDCA
e51c01b0	225	dio_register_driver(&hpdca_driver);
1da177e4 LT	226	#endif
	227	#ifdef CONFIG_HPAPCI
	228	if (hp300_model < HP_400) {
	229	if (!num_ports)
	230	return -ENODEV;
	231	return 0;
	232	}
	233	/* These models have the Frodo chip.
	234	* Port 0 is reserved for the Apollo Domain keyboard.
	235	* Port 1 is either the console or the DCA.
	236	*/
	237	for (i = 1; i < 4; i++) {
0fe1c137 AC	238	/* Port 1 is the console on a 425e, on other machines it's
0fe1c137 AC	239	* mapped to DCA.
1da177e4 LT	240	*/
1da177e4 LT	241	#ifdef CONFIG_SERIAL_8250_CONSOLE
0fe1c137	242	if (i == 1)
1da177e4	243	continue;
1da177e4 LT	244	#endif
	245
	246	/* Create new serial device */
	247	port = kmalloc(sizeof(struct hp300_port), GFP_KERNEL);
	248	if (!port)
	249	return -ENOMEM;
	250
2b49abac	251	memset(&uport, 0, sizeof(struct uart_port));
1da177e4 LT	252
	253	base = (FRODO_BASE + FRODO_APCI_OFFSET(i));
	254
	255	/* Memory mapped I/O */
2b49abac	256	uport.iotype = UPIO_MEM;
0fe1c137 AC	257	uport.flags = UPF_SKIP_TEST \| UPF_SHARE_IRQ \
0fe1c137 AC	258	\| UPF_BOOT_AUTOCONF;
1da177e4	259	/* XXX - no interrupt support yet */
2b49abac RK	260	uport.irq = 0;
	261	uport.uartclk = HPAPCI_BAUD_BASE * 16;
	262	uport.mapbase = base;
	263	uport.membase = (char *)(base + DIO_VIRADDRBASE);
	264	uport.regshift = 2;
1da177e4	265
2b49abac	266	line = serial8250_register_port(&uport);
1da177e4 LT	267
1da177e4 LT	268	if (line < 0) {
0fe1c137 AC	269	printk(KERN_NOTICE "8250_hp300: register_serial() APCI"
0fe1c137 AC	270	" %d irq %d failed\n", i, uport.irq);
1da177e4 LT	271	kfree(port);
	272	continue;
	273	}
	274
	275	port->line = line;
	276	port->next = hp300_ports;
	277	hp300_ports = port;
	278
	279	num_ports++;
	280	}
	281	#endif
	282
	283	/* Any boards found? */
	284	if (!num_ports)
	285	return -ENODEV;
	286
	287	return 0;
	288	}
	289
	290	#ifdef CONFIG_HPDCA
	291	static void __devexit hpdca_remove_one(struct dio_dev *d)
	292	{
	293	int line;
	294
	295	line = (int) dio_get_drvdata(d);
	296	if (d->resource.start) {
	297	/* Disable board-interrupts */
	298	out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, 0);
	299	}
2b49abac	300	serial8250_unregister_port(line);
1da177e4 LT	301	}
	302	#endif
	303
	304	static void __exit hp300_8250_exit(void)
	305	{
	306	#ifdef CONFIG_HPAPCI
	307	struct hp300_port port, to_free;
	308
	309	for (port = hp300_ports; port; ) {
2b49abac	310	serial8250_unregister_port(port->line);
1da177e4 LT	311	to_free = port;
	312	port = port->next;
	313	kfree(to_free);
	314	}
	315
	316	hp300_ports = NULL;
	317	#endif
	318	#ifdef CONFIG_HPDCA
	319	dio_unregister_driver(&hpdca_driver);
	320	#endif
	321	}
	322
	323	module_init(hp300_8250_init);
	324	module_exit(hp300_8250_exit);
	325	MODULE_DESCRIPTION("HP DCA/APCI serial driver");
	326	MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
	327	MODULE_LICENSE("GPL");