[deliverable/linux.git] / drivers / rapidio / switches / tsi568.c

/*
 * RapidIO Tsi568 switch support
 *
 * Copyright 2009-2010 Integrated Device Technology, Inc.
 * Alexandre Bounine <alexandre.bounine@idt.com>
 *  - Added EM support
 *  - Modified switch operations initialization.
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <mporter@kernel.crashing.org>
 *
 * 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/rio.h>
#include <linux/rio_drv.h>
#include <linux/rio_ids.h>
#include <linux/delay.h>
#include <linux/module.h>
#include "../rio.h"

/* Global (broadcast) route registers */
#define SPBC_ROUTE_CFG_DESTID	0x10070
#define SPBC_ROUTE_CFG_PORT	0x10074

/* Per port route registers */
#define SPP_ROUTE_CFG_DESTID(n)	(0x11070 + 0x100*n)
#define SPP_ROUTE_CFG_PORT(n)	(0x11074 + 0x100*n)

#define TSI568_SP_MODE(n)	(0x11004 + 0x100*n)
#define  TSI568_SP_MODE_PW_DIS	0x08000000

static int
tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
		       u16 table, u16 route_destid, u8 route_port)
{
	if (table == RIO_GLOBAL_TABLE) {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_DESTID, route_destid);
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_PORT, route_port);
	} else {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_DESTID(table),
					route_destid);
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_PORT(table), route_port);
	}

	udelay(10);

	return 0;
}

static int
tsi568_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
		       u16 table, u16 route_destid, u8 *route_port)
{
	int ret = 0;
	u32 result;

	if (table == RIO_GLOBAL_TABLE) {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_DESTID, route_destid);
		rio_mport_read_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_PORT, &result);
	} else {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_DESTID(table),
					route_destid);
		rio_mport_read_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_PORT(table), &result);
	}

	*route_port = result;
	if (*route_port > 15)
		ret = -1;

	return ret;
}

static int
tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
		       u16 table)
{
	u32 route_idx;
	u32 lut_size;

	lut_size = (mport->sys_size) ? 0x1ff : 0xff;

	if (table == RIO_GLOBAL_TABLE) {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPBC_ROUTE_CFG_DESTID, 0x80000000);
		for (route_idx = 0; route_idx <= lut_size; route_idx++)
			rio_mport_write_config_32(mport, destid, hopcount,
						SPBC_ROUTE_CFG_PORT,
						RIO_INVALID_ROUTE);
	} else {
		rio_mport_write_config_32(mport, destid, hopcount,
					SPP_ROUTE_CFG_DESTID(table),
					0x80000000);
		for (route_idx = 0; route_idx <= lut_size; route_idx++)
			rio_mport_write_config_32(mport, destid, hopcount,
						SPP_ROUTE_CFG_PORT(table),
						RIO_INVALID_ROUTE);
	}

	return 0;
}

static int
tsi568_em_init(struct rio_dev *rdev)
{
	u32 regval;
	int portnum;

	pr_debug("TSI568 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);

	/* Make sure that Port-Writes are disabled (for all ports) */
	for (portnum = 0;
	     portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
		rio_read_config_32(rdev, TSI568_SP_MODE(portnum), &regval);
		rio_write_config_32(rdev, TSI568_SP_MODE(portnum),
				    regval | TSI568_SP_MODE_PW_DIS);
	}

	return 0;
}

static struct rio_switch_ops tsi568_switch_ops = {
	.owner = THIS_MODULE,
	.add_entry = tsi568_route_add_entry,
	.get_entry = tsi568_route_get_entry,
	.clr_table = tsi568_route_clr_table,
	.set_domain = NULL,
	.get_domain = NULL,
	.em_init = tsi568_em_init,
	.em_handle = NULL,
};

static int tsi568_probe(struct rio_dev *rdev, const struct rio_device_id *id)
{
	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));

	spin_lock(&rdev->rswitch->lock);

	if (rdev->rswitch->ops) {
		spin_unlock(&rdev->rswitch->lock);
		return -EINVAL;
	}

	rdev->rswitch->ops = &tsi568_switch_ops;
	spin_unlock(&rdev->rswitch->lock);
	return 0;
}

static void tsi568_remove(struct rio_dev *rdev)
{
	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
	spin_lock(&rdev->rswitch->lock);
	if (rdev->rswitch->ops != &tsi568_switch_ops) {
		spin_unlock(&rdev->rswitch->lock);
		return;
	}
	rdev->rswitch->ops = NULL;
	spin_unlock(&rdev->rswitch->lock);
}

static struct rio_device_id tsi568_id_table[] = {
	{RIO_DEVICE(RIO_DID_TSI568, RIO_VID_TUNDRA)},
	{ 0, }	/* terminate list */
};

static struct rio_driver tsi568_driver = {
	.name = "tsi568",
	.id_table = tsi568_id_table,
	.probe = tsi568_probe,
	.remove = tsi568_remove,
};

static int __init tsi568_init(void)
{
	return rio_register_driver(&tsi568_driver);
}

static void __exit tsi568_exit(void)
{
	rio_unregister_driver(&tsi568_driver);
}

device_initcall(tsi568_init);
module_exit(tsi568_exit);

MODULE_DESCRIPTION("IDT Tsi568 Serial RapidIO switch driver");
MODULE_AUTHOR("Integrated Device Technology, Inc.");
MODULE_LICENSE("GPL");
Commit	Line	Data
07590ff0 AB	1	/*
	2	* RapidIO Tsi568 switch support
	3	*
	4	* Copyright 2009-2010 Integrated Device Technology, Inc.
058f88d6 AB	5	* Alexandre Bounine <alexandre.bounine@idt.com>
	6	* - Added EM support
	7	* - Modified switch operations initialization.
	8	*
07590ff0 AB	9	* Copyright 2005 MontaVista Software, Inc.
	10	* Matt Porter <mporter@kernel.crashing.org>
	11	*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the
	14	* Free Software Foundation; either version 2 of the License, or (at your
	15	* option) any later version.
	16	*/
	17
	18	#include <linux/rio.h>
	19	#include <linux/rio_drv.h>
	20	#include <linux/rio_ids.h>
	21	#include <linux/delay.h>
2ec3ba69	22	#include <linux/module.h>
07590ff0 AB	23	#include "../rio.h"
	24
	25	/* Global (broadcast) route registers */
	26	#define SPBC_ROUTE_CFG_DESTID 0x10070
	27	#define SPBC_ROUTE_CFG_PORT 0x10074
	28
	29	/* Per port route registers */
	30	#define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
	31	#define SPP_ROUTE_CFG_PORT(n) (0x11074 + 0x100*n)
	32
1548bf31	33	#define TSI568_SP_MODE(n) (0x11004 + 0x100*n)
e5cabeb3 AB	34	#define TSI568_SP_MODE_PW_DIS 0x08000000
e5cabeb3 AB	35
07590ff0 AB	36	static int
	37	tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
	38	u16 table, u16 route_destid, u8 route_port)
	39	{
	40	if (table == RIO_GLOBAL_TABLE) {
	41	rio_mport_write_config_32(mport, destid, hopcount,
	42	SPBC_ROUTE_CFG_DESTID, route_destid);
	43	rio_mport_write_config_32(mport, destid, hopcount,
	44	SPBC_ROUTE_CFG_PORT, route_port);
	45	} else {
	46	rio_mport_write_config_32(mport, destid, hopcount,
	47	SPP_ROUTE_CFG_DESTID(table),
	48	route_destid);
	49	rio_mport_write_config_32(mport, destid, hopcount,
	50	SPP_ROUTE_CFG_PORT(table), route_port);
	51	}
	52
	53	udelay(10);
	54
	55	return 0;
	56	}
	57
	58	static int
	59	tsi568_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
	60	u16 table, u16 route_destid, u8 *route_port)
	61	{
	62	int ret = 0;
	63	u32 result;
	64
	65	if (table == RIO_GLOBAL_TABLE) {
	66	rio_mport_write_config_32(mport, destid, hopcount,
	67	SPBC_ROUTE_CFG_DESTID, route_destid);
	68	rio_mport_read_config_32(mport, destid, hopcount,
	69	SPBC_ROUTE_CFG_PORT, &result);
	70	} else {
	71	rio_mport_write_config_32(mport, destid, hopcount,
	72	SPP_ROUTE_CFG_DESTID(table),
	73	route_destid);
	74	rio_mport_read_config_32(mport, destid, hopcount,
	75	SPP_ROUTE_CFG_PORT(table), &result);
	76	}
	77
	78	*route_port = result;
	79	if (*route_port > 15)
	80	ret = -1;
	81
	82	return ret;
	83	}
	84
	85	static int
	86	tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
	87	u16 table)
	88	{
	89	u32 route_idx;
	90	u32 lut_size;
	91
	92	lut_size = (mport->sys_size) ? 0x1ff : 0xff;
	93
	94	if (table == RIO_GLOBAL_TABLE) {
	95	rio_mport_write_config_32(mport, destid, hopcount,
	96	SPBC_ROUTE_CFG_DESTID, 0x80000000);
	97	for (route_idx = 0; route_idx <= lut_size; route_idx++)
	98	rio_mport_write_config_32(mport, destid, hopcount,
	99	SPBC_ROUTE_CFG_PORT,
100	RIO_INVALID_ROUTE);
101	} else {
102	rio_mport_write_config_32(mport, destid, hopcount,
103	SPP_ROUTE_CFG_DESTID(table),
104	0x80000000);
105	for (route_idx = 0; route_idx <= lut_size; route_idx++)
106	rio_mport_write_config_32(mport, destid, hopcount,
107	SPP_ROUTE_CFG_PORT(table),
108	RIO_INVALID_ROUTE);
109	}
110
111	return 0;
112	}
113
e5cabeb3 AB	114	static int
	115	tsi568_em_init(struct rio_dev *rdev)
	116	{
e5cabeb3	117	u32 regval;
1548bf31	118	int portnum;
e5cabeb3	119
a93192a5	120	pr_debug("TSI568 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);
e5cabeb3 AB	121
e5cabeb3 AB	122	/* Make sure that Port-Writes are disabled (for all ports) */
1548bf31 AB	123	for (portnum = 0;
1548bf31 AB	124	portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
a93192a5 AB	125	rio_read_config_32(rdev, TSI568_SP_MODE(portnum), &regval);
	126	rio_write_config_32(rdev, TSI568_SP_MODE(portnum),
	127	regval \| TSI568_SP_MODE_PW_DIS);
1548bf31	128	}
e5cabeb3 AB	129
	130	return 0;
	131	}
	132
2ec3ba69 AB	133	static struct rio_switch_ops tsi568_switch_ops = {
	134	.owner = THIS_MODULE,
	135	.add_entry = tsi568_route_add_entry,
	136	.get_entry = tsi568_route_get_entry,
	137	.clr_table = tsi568_route_clr_table,
	138	.set_domain = NULL,
	139	.get_domain = NULL,
	140	.em_init = tsi568_em_init,
	141	.em_handle = NULL,
	142	};
	143
	144	static int tsi568_probe(struct rio_dev rdev, const struct rio_device_id id)
058f88d6 AB	145	{
058f88d6 AB	146	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
058f88d6	147
2ec3ba69 AB	148	spin_lock(&rdev->rswitch->lock);
	149
	150	if (rdev->rswitch->ops) {
	151	spin_unlock(&rdev->rswitch->lock);
	152	return -EINVAL;
	153	}
	154
	155	rdev->rswitch->ops = &tsi568_switch_ops;
	156	spin_unlock(&rdev->rswitch->lock);
058f88d6 AB	157	return 0;
	158	}
	159
2ec3ba69 AB	160	static void tsi568_remove(struct rio_dev *rdev)
	161	{
	162	pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
	163	spin_lock(&rdev->rswitch->lock);
	164	if (rdev->rswitch->ops != &tsi568_switch_ops) {
	165	spin_unlock(&rdev->rswitch->lock);
	166	return;
	167	}
	168	rdev->rswitch->ops = NULL;
	169	spin_unlock(&rdev->rswitch->lock);
	170	}
	171
	172	static struct rio_device_id tsi568_id_table[] = {
	173	{RIO_DEVICE(RIO_DID_TSI568, RIO_VID_TUNDRA)},
	174	{ 0, } /* terminate list */
	175	};
	176
	177	static struct rio_driver tsi568_driver = {
	178	.name = "tsi568",
	179	.id_table = tsi568_id_table,
	180	.probe = tsi568_probe,
	181	.remove = tsi568_remove,
	182	};
	183
	184	static int __init tsi568_init(void)
	185	{
	186	return rio_register_driver(&tsi568_driver);
	187	}
	188
	189	static void __exit tsi568_exit(void)
	190	{
	191	rio_unregister_driver(&tsi568_driver);
	192	}
	193
	194	device_initcall(tsi568_init);
	195	module_exit(tsi568_exit);
	196
	197	MODULE_DESCRIPTION("IDT Tsi568 Serial RapidIO switch driver");
	198	MODULE_AUTHOR("Integrated Device Technology, Inc.");
	199	MODULE_LICENSE("GPL");