diff options
Diffstat (limited to 'kernel/drivers/rapidio/switches/tsi568.c')
| -rw-r--r-- | kernel/drivers/rapidio/switches/tsi568.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/kernel/drivers/rapidio/switches/tsi568.c b/kernel/drivers/rapidio/switches/tsi568.c new file mode 100644 index 000000000..8a43561b9 --- /dev/null +++ b/kernel/drivers/rapidio/switches/tsi568.c @@ -0,0 +1,199 @@ +/* + * 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), ®val); + 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"); |