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linux-next/drivers/rapidio/switches/idt_gen2.c
Linus Torvalds d144746478 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 
Pull MIPS updates from Ralf Baechle:
 "MIPS updates:

   - All the things that didn't make 3.10.
   - Removes the Windriver PPMC platform.  Nobody will miss it.
   - Remove a workaround from kernel/irq/irqdomain.c which was there
     exclusivly for MIPS.  Patch by Grant Likely.
   - More small improvments for the SEAD 3 platform
   - Improvments on the BMIPS / SMP support for the BCM63xx series.
   - Various cleanups of dead leftovers.
   - Platform support for the Cavium Octeon-based EdgeRouter Lite.

  Two large KVM patchsets didn't make it for this pull request because
  their respective authors are vacationing"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (124 commits)
  MIPS: Kconfig: Add missing MODULES dependency to VPE_LOADER
  MIPS: BCM63xx: CLK: Add dummy clk_{set,round}_rate() functions
  MIPS: SEAD3: Disable L2 cache on SEAD-3.
  MIPS: BCM63xx: Enable second core SMP on BCM6328 if available
  MIPS: BCM63xx: Add SMP support to prom.c
  MIPS: define write{b,w,l,q}_relaxed
  MIPS: Expose missing pci_io{map,unmap} declarations
  MIPS: Malta: Update GCMP detection.
  Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET"
  MIPS: APSP: Remove <asm/kspd.h>
  SSB: Kconfig: Amend SSB_EMBEDDED dependencies
  MIPS: microMIPS: Fix improper definition of ISA exception bit.
  MIPS: Don't try to decode microMIPS branch instructions where they cannot exist.
  MIPS: Declare emulate_load_store_microMIPS as a static function.
  MIPS: Fix typos and cleanup comment
  MIPS: Cleanup indentation and whitespace
  MIPS: BMIPS: support booting from physical CPU other than 0
  MIPS: Only set cpu_has_mmips if SYS_SUPPORTS_MICROMIPS
  MIPS: GIC: Fix gic_set_affinity infinite loop
  MIPS: Don't save/restore OCTEON wide multiplier state on syscalls.
  ...
2013-07-13 14:52:21 -07:00

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/*
* IDT CPS Gen.2 Serial RapidIO switch family support
*
* Copyright 2010 Integrated Device Technology, Inc.
* Alexandre Bounine <alexandre.bounine@idt.com>
*
* 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/stat.h>
#include <linux/module.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/rio_ids.h>
#include <linux/delay.h>
#include <asm/page.h>
#include "../rio.h"
#define LOCAL_RTE_CONF_DESTID_SEL 0x010070
#define LOCAL_RTE_CONF_DESTID_SEL_PSEL 0x0000001f
#define IDT_LT_ERR_REPORT_EN 0x03100c
#define IDT_PORT_ERR_REPORT_EN(n) (0x031044 + (n)*0x40)
#define IDT_PORT_ERR_REPORT_EN_BC 0x03ff04
#define IDT_PORT_ISERR_REPORT_EN(n) (0x03104C + (n)*0x40)
#define IDT_PORT_ISERR_REPORT_EN_BC 0x03ff0c
#define IDT_PORT_INIT_TX_ACQUIRED 0x00000020
#define IDT_LANE_ERR_REPORT_EN(n) (0x038010 + (n)*0x100)
#define IDT_LANE_ERR_REPORT_EN_BC 0x03ff10
#define IDT_DEV_CTRL_1 0xf2000c
#define IDT_DEV_CTRL_1_GENPW 0x02000000
#define IDT_DEV_CTRL_1_PRSTBEH 0x00000001
#define IDT_CFGBLK_ERR_CAPTURE_EN 0x020008
#define IDT_CFGBLK_ERR_REPORT 0xf20014
#define IDT_CFGBLK_ERR_REPORT_GENPW 0x00000002
#define IDT_AUX_PORT_ERR_CAP_EN 0x020000
#define IDT_AUX_ERR_REPORT_EN 0xf20018
#define IDT_AUX_PORT_ERR_LOG_I2C 0x00000002
#define IDT_AUX_PORT_ERR_LOG_JTAG 0x00000001
#define IDT_ISLTL_ADDRESS_CAP 0x021014
#define IDT_RIO_DOMAIN 0xf20020
#define IDT_RIO_DOMAIN_MASK 0x000000ff
#define IDT_PW_INFO_CSR 0xf20024
#define IDT_SOFT_RESET 0xf20040
#define IDT_SOFT_RESET_REQ 0x00030097
#define IDT_I2C_MCTRL 0xf20050
#define IDT_I2C_MCTRL_GENPW 0x04000000
#define IDT_JTAG_CTRL 0xf2005c
#define IDT_JTAG_CTRL_GENPW 0x00000002
#define IDT_LANE_CTRL(n) (0xff8000 + (n)*0x100)
#define IDT_LANE_CTRL_BC 0xffff00
#define IDT_LANE_CTRL_GENPW 0x00200000
#define IDT_LANE_DFE_1_BC 0xffff18
#define IDT_LANE_DFE_2_BC 0xffff1c
#define IDT_PORT_OPS(n) (0xf40004 + (n)*0x100)
#define IDT_PORT_OPS_GENPW 0x08000000
#define IDT_PORT_OPS_PL_ELOG 0x00000040
#define IDT_PORT_OPS_LL_ELOG 0x00000020
#define IDT_PORT_OPS_LT_ELOG 0x00000010
#define IDT_PORT_OPS_BC 0xf4ff04
#define IDT_PORT_ISERR_DET(n) (0xf40008 + (n)*0x100)
#define IDT_ERR_CAP 0xfd0000
#define IDT_ERR_CAP_LOG_OVERWR 0x00000004
#define IDT_ERR_RD 0xfd0004
#define IDT_DEFAULT_ROUTE 0xde
#define IDT_NO_ROUTE 0xdf
static int
idtg2_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 route_port)
{
/*
* Select routing table to update
*/
if (table == RIO_GLOBAL_TABLE)
table = 0;
else
table++;
if (route_port == RIO_INVALID_ROUTE)
route_port = IDT_DEFAULT_ROUTE;
rio_mport_write_config_32(mport, destid, hopcount,
LOCAL_RTE_CONF_DESTID_SEL, table);
/*
* Program destination port for the specified destID
*/
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_DESTID_SEL_CSR,
(u32)route_destid);
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR,
(u32)route_port);
udelay(10);
return 0;
}
static int
idtg2_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table, u16 route_destid, u8 *route_port)
{
u32 result;
/*
* Select routing table to read
*/
if (table == RIO_GLOBAL_TABLE)
table = 0;
else
table++;
rio_mport_write_config_32(mport, destid, hopcount,
LOCAL_RTE_CONF_DESTID_SEL, table);
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_DESTID_SEL_CSR,
route_destid);
rio_mport_read_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
if (IDT_DEFAULT_ROUTE == (u8)result || IDT_NO_ROUTE == (u8)result)
*route_port = RIO_INVALID_ROUTE;
else
*route_port = (u8)result;
return 0;
}
static int
idtg2_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
u16 table)
{
u32 i;
/*
* Select routing table to read
*/
if (table == RIO_GLOBAL_TABLE)
table = 0;
else
table++;
rio_mport_write_config_32(mport, destid, hopcount,
LOCAL_RTE_CONF_DESTID_SEL, table);
for (i = RIO_STD_RTE_CONF_EXTCFGEN;
i <= (RIO_STD_RTE_CONF_EXTCFGEN | 0xff);) {
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_DESTID_SEL_CSR, i);
rio_mport_write_config_32(mport, destid, hopcount,
RIO_STD_RTE_CONF_PORT_SEL_CSR,
(IDT_DEFAULT_ROUTE << 24) | (IDT_DEFAULT_ROUTE << 16) |
(IDT_DEFAULT_ROUTE << 8) | IDT_DEFAULT_ROUTE);
i += 4;
}
return 0;
}
static int
idtg2_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
u8 sw_domain)
{
/*
* Switch domain configuration operates only at global level
*/
rio_mport_write_config_32(mport, destid, hopcount,
IDT_RIO_DOMAIN, (u32)sw_domain);
return 0;
}
static int
idtg2_get_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
u8 *sw_domain)
{
u32 regval;
/*
* Switch domain configuration operates only at global level
*/
rio_mport_read_config_32(mport, destid, hopcount,
IDT_RIO_DOMAIN, &regval);
*sw_domain = (u8)(regval & 0xff);
return 0;
}
static int
idtg2_em_init(struct rio_dev *rdev)
{
u32 regval;
int i, tmp;
/*
* This routine performs device-specific initialization only.
* All standard EM configuration should be performed at upper level.
*/
pr_debug("RIO: %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);
/* Set Port-Write info CSR: PRIO=3 and CRF=1 */
rio_write_config_32(rdev, IDT_PW_INFO_CSR, 0x0000e000);
/*
* Configure LT LAYER error reporting.
*/
/* Enable standard (RIO.p8) error reporting */
rio_write_config_32(rdev, IDT_LT_ERR_REPORT_EN,
REM_LTL_ERR_ILLTRAN | REM_LTL_ERR_UNSOLR |
REM_LTL_ERR_UNSUPTR);
/* Use Port-Writes for LT layer error reporting.
* Enable per-port reset
*/
rio_read_config_32(rdev, IDT_DEV_CTRL_1, &regval);
rio_write_config_32(rdev, IDT_DEV_CTRL_1,
regval | IDT_DEV_CTRL_1_GENPW | IDT_DEV_CTRL_1_PRSTBEH);
/*
* Configure PORT error reporting.
*/
/* Report all RIO.p8 errors supported by device */
rio_write_config_32(rdev, IDT_PORT_ERR_REPORT_EN_BC, 0x807e8037);
/* Configure reporting of implementation specific errors/events */
rio_write_config_32(rdev, IDT_PORT_ISERR_REPORT_EN_BC,
IDT_PORT_INIT_TX_ACQUIRED);
/* Use Port-Writes for port error reporting and enable error logging */
tmp = RIO_GET_TOTAL_PORTS(rdev->swpinfo);
for (i = 0; i < tmp; i++) {
rio_read_config_32(rdev, IDT_PORT_OPS(i), &regval);
rio_write_config_32(rdev,
IDT_PORT_OPS(i), regval | IDT_PORT_OPS_GENPW |
IDT_PORT_OPS_PL_ELOG |
IDT_PORT_OPS_LL_ELOG |
IDT_PORT_OPS_LT_ELOG);
}
/* Overwrite error log if full */
rio_write_config_32(rdev, IDT_ERR_CAP, IDT_ERR_CAP_LOG_OVERWR);
/*
* Configure LANE error reporting.
*/
/* Disable line error reporting */
rio_write_config_32(rdev, IDT_LANE_ERR_REPORT_EN_BC, 0);
/* Use Port-Writes for lane error reporting (when enabled)
* (do per-lane update because lanes may have different configuration)
*/
tmp = (rdev->did == RIO_DID_IDTCPS1848) ? 48 : 16;
for (i = 0; i < tmp; i++) {
rio_read_config_32(rdev, IDT_LANE_CTRL(i), &regval);
rio_write_config_32(rdev, IDT_LANE_CTRL(i),
regval | IDT_LANE_CTRL_GENPW);
}
/*
* Configure AUX error reporting.
*/
/* Disable JTAG and I2C Error capture */
rio_write_config_32(rdev, IDT_AUX_PORT_ERR_CAP_EN, 0);
/* Disable JTAG and I2C Error reporting/logging */
rio_write_config_32(rdev, IDT_AUX_ERR_REPORT_EN, 0);
/* Disable Port-Write notification from JTAG */
rio_write_config_32(rdev, IDT_JTAG_CTRL, 0);
/* Disable Port-Write notification from I2C */
rio_read_config_32(rdev, IDT_I2C_MCTRL, &regval);
rio_write_config_32(rdev, IDT_I2C_MCTRL, regval & ~IDT_I2C_MCTRL_GENPW);
/*
* Configure CFG_BLK error reporting.
*/
/* Disable Configuration Block error capture */
rio_write_config_32(rdev, IDT_CFGBLK_ERR_CAPTURE_EN, 0);
/* Disable Port-Writes for Configuration Block error reporting */
rio_read_config_32(rdev, IDT_CFGBLK_ERR_REPORT, &regval);
rio_write_config_32(rdev, IDT_CFGBLK_ERR_REPORT,
regval & ~IDT_CFGBLK_ERR_REPORT_GENPW);
/* set TVAL = ~50us */
rio_write_config_32(rdev,
rdev->phys_efptr + RIO_PORT_LINKTO_CTL_CSR, 0x8e << 8);
return 0;
}
static int
idtg2_em_handler(struct rio_dev *rdev, u8 portnum)
{
u32 regval, em_perrdet, em_ltlerrdet;
rio_read_config_32(rdev,
rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet);
if (em_ltlerrdet) {
/* Service Logical/Transport Layer Error(s) */
if (em_ltlerrdet & REM_LTL_ERR_IMPSPEC) {
/* Implementation specific error reported */
rio_read_config_32(rdev,
IDT_ISLTL_ADDRESS_CAP, &regval);
pr_debug("RIO: %s Implementation Specific LTL errors" \
" 0x%x @(0x%x)\n",
rio_name(rdev), em_ltlerrdet, regval);
/* Clear implementation specific address capture CSR */
rio_write_config_32(rdev, IDT_ISLTL_ADDRESS_CAP, 0);
}
}
rio_read_config_32(rdev,
rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet);
if (em_perrdet) {
/* Service Port-Level Error(s) */
if (em_perrdet & REM_PED_IMPL_SPEC) {
/* Implementation Specific port error reported */
/* Get IS errors reported */
rio_read_config_32(rdev,
IDT_PORT_ISERR_DET(portnum), &regval);
pr_debug("RIO: %s Implementation Specific Port" \
" errors 0x%x\n", rio_name(rdev), regval);
/* Clear all implementation specific events */
rio_write_config_32(rdev,
IDT_PORT_ISERR_DET(portnum), 0);
}
}
return 0;
}
static ssize_t
idtg2_show_errlog(struct device *dev, struct device_attribute *attr, char *buf)
{
struct rio_dev *rdev = to_rio_dev(dev);
ssize_t len = 0;
u32 regval;
while (!rio_read_config_32(rdev, IDT_ERR_RD, &regval)) {
if (!regval) /* 0 = end of log */
break;
len += snprintf(buf + len, PAGE_SIZE - len,
"%08x\n", regval);
if (len >= (PAGE_SIZE - 10))
break;
}
return len;
}
static DEVICE_ATTR(errlog, S_IRUGO, idtg2_show_errlog, NULL);
static int idtg2_sysfs(struct rio_dev *rdev, bool create)
{
struct device *dev = &rdev->dev;
int err = 0;
if (create) {
/* Initialize sysfs entries */
err = device_create_file(dev, &dev_attr_errlog);
if (err)
dev_err(dev, "Unable create sysfs errlog file\n");
} else
device_remove_file(dev, &dev_attr_errlog);
return err;
}
static struct rio_switch_ops idtg2_switch_ops = {
.owner = THIS_MODULE,
.add_entry = idtg2_route_add_entry,
.get_entry = idtg2_route_get_entry,
.clr_table = idtg2_route_clr_table,
.set_domain = idtg2_set_domain,
.get_domain = idtg2_get_domain,
.em_init = idtg2_em_init,
.em_handle = idtg2_em_handler,
};
static int idtg2_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 = &idtg2_switch_ops;
if (rdev->do_enum) {
/* Ensure that default routing is disabled on startup */
rio_write_config_32(rdev,
RIO_STD_RTE_DEFAULT_PORT, IDT_NO_ROUTE);
}
/* Create device-specific sysfs attributes */
idtg2_sysfs(rdev, true);
spin_unlock(&rdev->rswitch->lock);
return 0;
}
static void idtg2_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 != &idtg2_switch_ops) {
spin_unlock(&rdev->rswitch->lock);
return;
}
rdev->rswitch->ops = NULL;
/* Remove device-specific sysfs attributes */
idtg2_sysfs(rdev, false);
spin_unlock(&rdev->rswitch->lock);
}
static struct rio_device_id idtg2_id_table[] = {
{RIO_DEVICE(RIO_DID_IDTCPS1848, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTCPS1616, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTVPS1616, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTSPS1616, RIO_VID_IDT)},
{RIO_DEVICE(RIO_DID_IDTCPS1432, RIO_VID_IDT)},
{ 0, } /* terminate list */
};
static struct rio_driver idtg2_driver = {
.name = "idt_gen2",
.id_table = idtg2_id_table,
.probe = idtg2_probe,
.remove = idtg2_remove,
};
static int __init idtg2_init(void)
{
return rio_register_driver(&idtg2_driver);
}
static void __exit idtg2_exit(void)
{
pr_debug("RIO: %s\n", __func__);
rio_unregister_driver(&idtg2_driver);
pr_debug("RIO: %s done\n", __func__);
}
device_initcall(idtg2_init);
module_exit(idtg2_exit);
MODULE_DESCRIPTION("IDT CPS Gen.2 Serial RapidIO switch family driver");
MODULE_AUTHOR("Integrated Device Technology, Inc.");
MODULE_LICENSE("GPL");
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