[deliverable/linux.git] / drivers / tty / serial / 8250 / 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_SERIAL_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 hpdca_init_one(struct dio_dev *d,
					const struct dio_device_id *ent);
static void 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    = 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.
 */
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 hpdca_init_one(struct dio_dev *d,
				const struct dio_device_id *ent)
{
	struct uart_8250_port uart;
	int line;

#ifdef CONFIG_SERIAL_8250_CONSOLE
	if (hp300_uart_scode == d->scode) {
		/* Already got it. */
		return 0;
	}
#endif
	memset(&uart, 0, sizeof(uart));

	/* Memory mapped I/O */
	uart.port.iotype = UPIO_MEM;
	uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
	uart.port.irq = d->ipl;
	uart.port.uartclk = HPDCA_BAUD_BASE * 16;
	uart.port.mapbase = (d->resource.start + UART_OFFSET);
	uart.port.membase = (char *)(uart.port.mapbase + DIO_VIRADDRBASE);
	uart.port.regshift = 1;
	uart.port.dev = &d->dev;
	line = serial8250_register_8250_port(&uart);

	if (line < 0) {
		printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d"
		       " irq %d failed\n", d->scode, uart.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_8250_port uart;
	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(&uart, 0, sizeof(uart));

		base = (FRODO_BASE + FRODO_APCI_OFFSET(i));

		/* Memory mapped I/O */
		uart.port.iotype = UPIO_MEM;
		uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \
			      | UPF_BOOT_AUTOCONF;
		/* XXX - no interrupt support yet */
		uart.port.irq = 0;
		uart.port.uartclk = HPAPCI_BAUD_BASE * 16;
		uart.port.mapbase = base;
		uart.port.membase = (char *)(base + DIO_VIRADDRBASE);
		uart.port.regshift = 2;

		line = serial8250_register_8250_port(&uart);

		if (line < 0) {
			printk(KERN_NOTICE "8250_hp300: register_serial() APCI"
			       " %d irq %d failed\n", i, uart.port.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 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	23	#if !defined(CONFIG_HPDCA) && !defined(CONFIG_HPAPCI)
c10b7390	24	#warning CONFIG_SERIAL_8250 defined but neither CONFIG_HPDCA nor CONFIG_HPAPCI defined, are you sure?
1da177e4 LT	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
9671f099	39	static int hpdca_init_one(struct dio_dev *d,
0fe1c137	40	const struct dio_device_id *ent);
ae8d8a14	41	static void hpdca_remove_one(struct dio_dev *d);
1da177e4 LT	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,
2d47b716	55	.remove = hpdca_remove_one,
1da177e4 LT	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	90	* debug serial ports and register them with the 8250 driver.
1da177e4 LT	91	*/
	92	int __init hp300_setup_serial_console(void)
	93	{
	94	int scode;
	95	struct uart_port port;
	96
	97	memset(&port, 0, sizeof(port));
	98
	99	if (hp300_uart_scode < 0 \|\| hp300_uart_scode > DIO_SCMAX)
	100	return 0;
	101
	102	if (DIO_SCINHOLE(hp300_uart_scode))
	103	return 0;
	104
	105	scode = hp300_uart_scode;
	106
	107	/* Memory mapped I/O */
	108	port.iotype = UPIO_MEM;
	109	port.flags = UPF_SKIP_TEST \| UPF_SHARE_IRQ \| UPF_BOOT_AUTOCONF;
	110	port.type = PORT_UNKNOWN;
	111
	112	/* Check for APCI console */
	113	if (scode == 256) {
	114	#ifdef CONFIG_HPAPCI
	115	printk(KERN_INFO "Serial console is HP APCI 1\n");
	116
	117	port.uartclk = HPAPCI_BAUD_BASE * 16;
	118	port.mapbase = (FRODO_BASE + FRODO_APCI_OFFSET(1));
	119	port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
	120	port.regshift = 2;
	121	add_preferred_console("ttyS", port.line, "9600n8");
	122	#else
	123	printk(KERN_WARNING "Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n");
	124	return 0;
	125	#endif
0fe1c137	126	} else {
1da177e4 LT	127	#ifdef CONFIG_HPDCA
1da177e4 LT	128	unsigned long pa = dio_scodetophysaddr(scode);
0fe1c137	129	if (!pa)
1da177e4	130	return 0;
1da177e4 LT	131
	132	printk(KERN_INFO "Serial console is HP DCA at select code %d\n", scode);
	133
	134	port.uartclk = HPDCA_BAUD_BASE * 16;
	135	port.mapbase = (pa + UART_OFFSET);
	136	port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
	137	port.regshift = 1;
	138	port.irq = DIO_IPL(pa + DIO_VIRADDRBASE);
	139
	140	/* Enable board-interrupts */
	141	out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
	142
0fe1c137	143	if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80)
1da177e4	144	add_preferred_console("ttyS", port.line, "9600n8");
1da177e4 LT	145	#else
	146	printk(KERN_WARNING "Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n");
	147	return 0;
	148	#endif
	149	}
	150
0fe1c137	151	if (early_serial_setup(&port) < 0)
1da177e4	152	printk(KERN_WARNING "hp300_setup_serial_console(): early_serial_setup() failed.\n");
1da177e4 LT	153	return 0;
	154	}
	155	#endif /* CONFIG_SERIAL_8250_CONSOLE */
	156
	157	#ifdef CONFIG_HPDCA
9671f099	158	static int hpdca_init_one(struct dio_dev *d,
0fe1c137	159	const struct dio_device_id *ent)
1da177e4	160	{
3e5bde8e	161	struct uart_8250_port uart;
1da177e4 LT	162	int line;
	163
	164	#ifdef CONFIG_SERIAL_8250_CONSOLE
	165	if (hp300_uart_scode == d->scode) {
	166	/* Already got it. */
	167	return 0;
	168	}
	169	#endif
2655a2c7	170	memset(&uart, 0, sizeof(uart));
1da177e4 LT	171
1da177e4 LT	172	/* Memory mapped I/O */
3e5bde8e GU	173	uart.port.iotype = UPIO_MEM;
	174	uart.port.flags = UPF_SKIP_TEST \| UPF_SHARE_IRQ \| UPF_BOOT_AUTOCONF;
	175	uart.port.irq = d->ipl;
	176	uart.port.uartclk = HPDCA_BAUD_BASE * 16;
	177	uart.port.mapbase = (d->resource.start + UART_OFFSET);
	178	uart.port.membase = (char *)(uart.port.mapbase + DIO_VIRADDRBASE);
	179	uart.port.regshift = 1;
	180	uart.port.dev = &d->dev;
2655a2c7	181	line = serial8250_register_8250_port(&uart);
1da177e4 LT	182
	183	if (line < 0) {
	184	printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d"
3e5bde8e	185	" irq %d failed\n", d->scode, uart.port.irq);
1da177e4 LT	186	return -ENOMEM;
	187	}
	188
	189	/* Enable board-interrupts */
	190	out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE);
	191	dio_set_drvdata(d, (void *)line);
	192
	193	/* Reset the DCA */
	194	out_8(d->resource.start + DIO_VIRADDRBASE + DCA_ID, 0xff);
	195	udelay(100);
	196
e51c01b0 BH	197	num_ports++;
e51c01b0 BH	198
1da177e4 LT	199	return 0;
	200	}
	201	#endif
	202
	203	static int __init hp300_8250_init(void)
	204	{
0fe1c137	205	static int called;
1da177e4 LT	206	#ifdef CONFIG_HPAPCI
	207	int line;
	208	unsigned long base;
2655a2c7	209	struct uart_8250_port uart;
1da177e4 LT	210	struct hp300_port *port;
	211	int i;
	212	#endif
	213	if (called)
	214	return -ENODEV;
	215	called = 1;
	216
	217	if (!MACH_IS_HP300)
	218	return -ENODEV;
	219
1da177e4	220	#ifdef CONFIG_HPDCA
e51c01b0	221	dio_register_driver(&hpdca_driver);
1da177e4 LT	222	#endif
	223	#ifdef CONFIG_HPAPCI
	224	if (hp300_model < HP_400) {
	225	if (!num_ports)
	226	return -ENODEV;
	227	return 0;
	228	}
	229	/* These models have the Frodo chip.
	230	* Port 0 is reserved for the Apollo Domain keyboard.
	231	* Port 1 is either the console or the DCA.
	232	*/
	233	for (i = 1; i < 4; i++) {
0fe1c137 AC	234	/* Port 1 is the console on a 425e, on other machines it's
0fe1c137 AC	235	* mapped to DCA.
1da177e4 LT	236	*/
1da177e4 LT	237	#ifdef CONFIG_SERIAL_8250_CONSOLE
0fe1c137	238	if (i == 1)
1da177e4	239	continue;
1da177e4 LT	240	#endif
	241
	242	/* Create new serial device */
	243	port = kmalloc(sizeof(struct hp300_port), GFP_KERNEL);
	244	if (!port)
	245	return -ENOMEM;
	246
2655a2c7	247	memset(&uart, 0, sizeof(uart));
1da177e4 LT	248
	249	base = (FRODO_BASE + FRODO_APCI_OFFSET(i));
	250
	251	/* Memory mapped I/O */
2655a2c7 AC	252	uart.port.iotype = UPIO_MEM;
2655a2c7 AC	253	uart.port.flags = UPF_SKIP_TEST \| UPF_SHARE_IRQ \
0fe1c137	254	\| UPF_BOOT_AUTOCONF;
1da177e4	255	/* XXX - no interrupt support yet */
2655a2c7 AC	256	uart.port.irq = 0;
	257	uart.port.uartclk = HPAPCI_BAUD_BASE * 16;
	258	uart.port.mapbase = base;
	259	uart.port.membase = (char *)(base + DIO_VIRADDRBASE);
	260	uart.port.regshift = 2;
1da177e4	261
2655a2c7	262	line = serial8250_register_8250_port(&uart);
1da177e4 LT	263
1da177e4 LT	264	if (line < 0) {
0fe1c137	265	printk(KERN_NOTICE "8250_hp300: register_serial() APCI"
2655a2c7	266	" %d irq %d failed\n", i, uart.port.irq);
1da177e4 LT	267	kfree(port);
	268	continue;
	269	}
	270
	271	port->line = line;
	272	port->next = hp300_ports;
	273	hp300_ports = port;
	274
	275	num_ports++;
	276	}
	277	#endif
	278
	279	/* Any boards found? */
	280	if (!num_ports)
	281	return -ENODEV;
	282
	283	return 0;
	284	}
	285
	286	#ifdef CONFIG_HPDCA
ae8d8a14	287	static void hpdca_remove_one(struct dio_dev *d)
1da177e4 LT	288	{
	289	int line;
	290
	291	line = (int) dio_get_drvdata(d);
	292	if (d->resource.start) {
	293	/* Disable board-interrupts */
	294	out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, 0);
	295	}
2b49abac	296	serial8250_unregister_port(line);
1da177e4 LT	297	}
	298	#endif
	299
	300	static void __exit hp300_8250_exit(void)
	301	{
	302	#ifdef CONFIG_HPAPCI
	303	struct hp300_port port, to_free;
	304
	305	for (port = hp300_ports; port; ) {
2b49abac	306	serial8250_unregister_port(port->line);
1da177e4 LT	307	to_free = port;
	308	port = port->next;
	309	kfree(to_free);
	310	}
	311
	312	hp300_ports = NULL;
	313	#endif
	314	#ifdef CONFIG_HPDCA
	315	dio_unregister_driver(&hpdca_driver);
	316	#endif
	317	}
	318
	319	module_init(hp300_8250_init);
	320	module_exit(hp300_8250_exit);
	321	MODULE_DESCRIPTION("HP DCA/APCI serial driver");
	322	MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
	323	MODULE_LICENSE("GPL");