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linux/drivers/vme/bridges/vme_tsi148.c
Markus Elfring a75dc63008 vme: tsi148: Adjust 14 checks for null pointers 
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The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written …

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Martyn Welch <martyn@welchs.me.uk>
2017-10-13 21:32:04 +01:00

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/*
* Support for the Tundra TSI148 VME-PCI Bridge Chip
*
* Author: Martyn Welch <martyn.welch@ge.com>
* Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
*
* Based on work by Tom Armistead and Ajit Prem
* Copyright 2004 Motorola Inc.
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/byteorder/generic.h>
#include <linux/vme.h>
#include "../vme_bridge.h"
#include "vme_tsi148.h"
static int tsi148_probe(struct pci_dev *, const struct pci_device_id *);
static void tsi148_remove(struct pci_dev *);
/* Module parameter */
static bool err_chk;
static int geoid;
static const char driver_name[] = "vme_tsi148";
static const struct pci_device_id tsi148_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_TUNDRA, PCI_DEVICE_ID_TUNDRA_TSI148) },
{ },
};
MODULE_DEVICE_TABLE(pci, tsi148_ids);
static struct pci_driver tsi148_driver = {
.name = driver_name,
.id_table = tsi148_ids,
.probe = tsi148_probe,
.remove = tsi148_remove,
};
static void reg_join(unsigned int high, unsigned int low,
unsigned long long *variable)
{
*variable = (unsigned long long)high << 32;
*variable |= (unsigned long long)low;
}
static void reg_split(unsigned long long variable, unsigned int *high,
unsigned int *low)
{
*low = (unsigned int)variable & 0xFFFFFFFF;
*high = (unsigned int)(variable >> 32);
}
/*
* Wakes up DMA queue.
*/
static u32 tsi148_DMA_irqhandler(struct tsi148_driver *bridge,
int channel_mask)
{
u32 serviced = 0;
if (channel_mask & TSI148_LCSR_INTS_DMA0S) {
wake_up(&bridge->dma_queue[0]);
serviced |= TSI148_LCSR_INTC_DMA0C;
}
if (channel_mask & TSI148_LCSR_INTS_DMA1S) {
wake_up(&bridge->dma_queue[1]);
serviced |= TSI148_LCSR_INTC_DMA1C;
}
return serviced;
}
/*
* Wake up location monitor queue
*/
static u32 tsi148_LM_irqhandler(struct tsi148_driver *bridge, u32 stat)
{
int i;
u32 serviced = 0;
for (i = 0; i < 4; i++) {
if (stat & TSI148_LCSR_INTS_LMS[i]) {
/* We only enable interrupts if the callback is set */
bridge->lm_callback[i](bridge->lm_data[i]);
serviced |= TSI148_LCSR_INTC_LMC[i];
}
}
return serviced;
}
/*
* Wake up mail box queue.
*
* XXX This functionality is not exposed up though API.
*/
static u32 tsi148_MB_irqhandler(struct vme_bridge *tsi148_bridge, u32 stat)
{
int i;
u32 val;
u32 serviced = 0;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
for (i = 0; i < 4; i++) {
if (stat & TSI148_LCSR_INTS_MBS[i]) {
val = ioread32be(bridge->base + TSI148_GCSR_MBOX[i]);
dev_err(tsi148_bridge->parent, "VME Mailbox %d received"
": 0x%x\n", i, val);
serviced |= TSI148_LCSR_INTC_MBC[i];
}
}
return serviced;
}
/*
* Display error & status message when PERR (PCI) exception interrupt occurs.
*/
static u32 tsi148_PERR_irqhandler(struct vme_bridge *tsi148_bridge)
{
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
dev_err(tsi148_bridge->parent, "PCI Exception at address: 0x%08x:%08x, "
"attributes: %08x\n",
ioread32be(bridge->base + TSI148_LCSR_EDPAU),
ioread32be(bridge->base + TSI148_LCSR_EDPAL),
ioread32be(bridge->base + TSI148_LCSR_EDPAT));
dev_err(tsi148_bridge->parent, "PCI-X attribute reg: %08x, PCI-X split "
"completion reg: %08x\n",
ioread32be(bridge->base + TSI148_LCSR_EDPXA),
ioread32be(bridge->base + TSI148_LCSR_EDPXS));
iowrite32be(TSI148_LCSR_EDPAT_EDPCL, bridge->base + TSI148_LCSR_EDPAT);
return TSI148_LCSR_INTC_PERRC;
}
/*
* Save address and status when VME error interrupt occurs.
*/
static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
{
unsigned int error_addr_high, error_addr_low;
unsigned long long error_addr;
u32 error_attrib;
int error_am;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
error_addr_high = ioread32be(bridge->base + TSI148_LCSR_VEAU);
error_addr_low = ioread32be(bridge->base + TSI148_LCSR_VEAL);
error_attrib = ioread32be(bridge->base + TSI148_LCSR_VEAT);
error_am = (error_attrib & TSI148_LCSR_VEAT_AM_M) >> 8;
reg_join(error_addr_high, error_addr_low, &error_addr);
/* Check for exception register overflow (we have lost error data) */
if (error_attrib & TSI148_LCSR_VEAT_VEOF) {
dev_err(tsi148_bridge->parent, "VME Bus Exception Overflow "
"Occurred\n");
}
if (err_chk)
vme_bus_error_handler(tsi148_bridge, error_addr, error_am);
else
dev_err(tsi148_bridge->parent,
"VME Bus Error at address: 0x%llx, attributes: %08x\n",
error_addr, error_attrib);
/* Clear Status */
iowrite32be(TSI148_LCSR_VEAT_VESCL, bridge->base + TSI148_LCSR_VEAT);
return TSI148_LCSR_INTC_VERRC;
}
/*
* Wake up IACK queue.
*/
static u32 tsi148_IACK_irqhandler(struct tsi148_driver *bridge)
{
wake_up(&bridge->iack_queue);
return TSI148_LCSR_INTC_IACKC;
}
/*
* Calling VME bus interrupt callback if provided.
*/
static u32 tsi148_VIRQ_irqhandler(struct vme_bridge *tsi148_bridge,
u32 stat)
{
int vec, i, serviced = 0;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
for (i = 7; i > 0; i--) {
if (stat & (1 << i)) {
/*
* Note: Even though the registers are defined as
* 32-bits in the spec, we only want to issue 8-bit
* IACK cycles on the bus, read from offset 3.
*/
vec = ioread8(bridge->base + TSI148_LCSR_VIACK[i] + 3);
vme_irq_handler(tsi148_bridge, i, vec);
serviced |= (1 << i);
}
}
return serviced;
}
/*
* Top level interrupt handler. Clears appropriate interrupt status bits and
* then calls appropriate sub handler(s).
*/
static irqreturn_t tsi148_irqhandler(int irq, void *ptr)
{
u32 stat, enable, serviced = 0;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
tsi148_bridge = ptr;
bridge = tsi148_bridge->driver_priv;
/* Determine which interrupts are unmasked and set */
enable = ioread32be(bridge->base + TSI148_LCSR_INTEO);
stat = ioread32be(bridge->base + TSI148_LCSR_INTS);
/* Only look at unmasked interrupts */
stat &= enable;
if (unlikely(!stat))
return IRQ_NONE;
/* Call subhandlers as appropriate */
/* DMA irqs */
if (stat & (TSI148_LCSR_INTS_DMA1S | TSI148_LCSR_INTS_DMA0S))
serviced |= tsi148_DMA_irqhandler(bridge, stat);
/* Location monitor irqs */
if (stat & (TSI148_LCSR_INTS_LM3S | TSI148_LCSR_INTS_LM2S |
TSI148_LCSR_INTS_LM1S | TSI148_LCSR_INTS_LM0S))
serviced |= tsi148_LM_irqhandler(bridge, stat);
/* Mail box irqs */
if (stat & (TSI148_LCSR_INTS_MB3S | TSI148_LCSR_INTS_MB2S |
TSI148_LCSR_INTS_MB1S | TSI148_LCSR_INTS_MB0S))
serviced |= tsi148_MB_irqhandler(tsi148_bridge, stat);
/* PCI bus error */
if (stat & TSI148_LCSR_INTS_PERRS)
serviced |= tsi148_PERR_irqhandler(tsi148_bridge);
/* VME bus error */
if (stat & TSI148_LCSR_INTS_VERRS)
serviced |= tsi148_VERR_irqhandler(tsi148_bridge);
/* IACK irq */
if (stat & TSI148_LCSR_INTS_IACKS)
serviced |= tsi148_IACK_irqhandler(bridge);
/* VME bus irqs */
if (stat & (TSI148_LCSR_INTS_IRQ7S | TSI148_LCSR_INTS_IRQ6S |
TSI148_LCSR_INTS_IRQ5S | TSI148_LCSR_INTS_IRQ4S |
TSI148_LCSR_INTS_IRQ3S | TSI148_LCSR_INTS_IRQ2S |
TSI148_LCSR_INTS_IRQ1S))
serviced |= tsi148_VIRQ_irqhandler(tsi148_bridge, stat);
/* Clear serviced interrupts */
iowrite32be(serviced, bridge->base + TSI148_LCSR_INTC);
return IRQ_HANDLED;
}
static int tsi148_irq_init(struct vme_bridge *tsi148_bridge)
{
int result;
unsigned int tmp;
struct pci_dev *pdev;
struct tsi148_driver *bridge;
pdev = to_pci_dev(tsi148_bridge->parent);
bridge = tsi148_bridge->driver_priv;
result = request_irq(pdev->irq,
tsi148_irqhandler,
IRQF_SHARED,
driver_name, tsi148_bridge);
if (result) {
dev_err(tsi148_bridge->parent, "Can't get assigned pci irq "
"vector %02X\n", pdev->irq);
return result;
}
/* Enable and unmask interrupts */
tmp = TSI148_LCSR_INTEO_DMA1EO | TSI148_LCSR_INTEO_DMA0EO |
TSI148_LCSR_INTEO_MB3EO | TSI148_LCSR_INTEO_MB2EO |
TSI148_LCSR_INTEO_MB1EO | TSI148_LCSR_INTEO_MB0EO |
TSI148_LCSR_INTEO_PERREO | TSI148_LCSR_INTEO_VERREO |
TSI148_LCSR_INTEO_IACKEO;
/* This leaves the following interrupts masked.
* TSI148_LCSR_INTEO_VIEEO
* TSI148_LCSR_INTEO_SYSFLEO
* TSI148_LCSR_INTEO_ACFLEO
*/
/* Don't enable Location Monitor interrupts here - they will be
* enabled when the location monitors are properly configured and
* a callback has been attached.
* TSI148_LCSR_INTEO_LM0EO
* TSI148_LCSR_INTEO_LM1EO
* TSI148_LCSR_INTEO_LM2EO
* TSI148_LCSR_INTEO_LM3EO
*/
/* Don't enable VME interrupts until we add a handler, else the board
* will respond to it and we don't want that unless it knows how to
* properly deal with it.
* TSI148_LCSR_INTEO_IRQ7EO
* TSI148_LCSR_INTEO_IRQ6EO
* TSI148_LCSR_INTEO_IRQ5EO
* TSI148_LCSR_INTEO_IRQ4EO
* TSI148_LCSR_INTEO_IRQ3EO
* TSI148_LCSR_INTEO_IRQ2EO
* TSI148_LCSR_INTEO_IRQ1EO
*/
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
return 0;
}
static void tsi148_irq_exit(struct vme_bridge *tsi148_bridge,
struct pci_dev *pdev)
{
struct tsi148_driver *bridge = tsi148_bridge->driver_priv;
/* Turn off interrupts */
iowrite32be(0x0, bridge->base + TSI148_LCSR_INTEO);
iowrite32be(0x0, bridge->base + TSI148_LCSR_INTEN);
/* Clear all interrupts */
iowrite32be(0xFFFFFFFF, bridge->base + TSI148_LCSR_INTC);
/* Detach interrupt handler */
free_irq(pdev->irq, tsi148_bridge);
}
/*
* Check to see if an IACk has been received, return true (1) or false (0).
*/
static int tsi148_iack_received(struct tsi148_driver *bridge)
{
u32 tmp;
tmp = ioread32be(bridge->base + TSI148_LCSR_VICR);
if (tmp & TSI148_LCSR_VICR_IRQS)
return 0;
else
return 1;
}
/*
* Configure VME interrupt
*/
static void tsi148_irq_set(struct vme_bridge *tsi148_bridge, int level,
int state, int sync)
{
struct pci_dev *pdev;
u32 tmp;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
/* We need to do the ordering differently for enabling and disabling */
if (state == 0) {
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEN);
tmp &= ~TSI148_LCSR_INTEN_IRQEN[level - 1];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
tmp &= ~TSI148_LCSR_INTEO_IRQEO[level - 1];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
if (sync != 0) {
pdev = to_pci_dev(tsi148_bridge->parent);
synchronize_irq(pdev->irq);
}
} else {
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
tmp |= TSI148_LCSR_INTEO_IRQEO[level - 1];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEN);
tmp |= TSI148_LCSR_INTEN_IRQEN[level - 1];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
}
}
/*
* Generate a VME bus interrupt at the requested level & vector. Wait for
* interrupt to be acked.
*/
static int tsi148_irq_generate(struct vme_bridge *tsi148_bridge, int level,
int statid)
{
u32 tmp;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
mutex_lock(&bridge->vme_int);
/* Read VICR register */
tmp = ioread32be(bridge->base + TSI148_LCSR_VICR);
/* Set Status/ID */
tmp = (tmp & ~TSI148_LCSR_VICR_STID_M) |
(statid & TSI148_LCSR_VICR_STID_M);
iowrite32be(tmp, bridge->base + TSI148_LCSR_VICR);
/* Assert VMEbus IRQ */
tmp = tmp | TSI148_LCSR_VICR_IRQL[level];
iowrite32be(tmp, bridge->base + TSI148_LCSR_VICR);
/* XXX Consider implementing a timeout? */
wait_event_interruptible(bridge->iack_queue,
tsi148_iack_received(bridge));
mutex_unlock(&bridge->vme_int);
return 0;
}
/*
* Initialize a slave window with the requested attributes.
*/
static int tsi148_slave_set(struct vme_slave_resource *image, int enabled,
unsigned long long vme_base, unsigned long long size,
dma_addr_t pci_base, u32 aspace, u32 cycle)
{
unsigned int i, addr = 0, granularity = 0;
unsigned int temp_ctl = 0;
unsigned int vme_base_low, vme_base_high;
unsigned int vme_bound_low, vme_bound_high;
unsigned int pci_offset_low, pci_offset_high;
unsigned long long vme_bound, pci_offset;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
tsi148_bridge = image->parent;
bridge = tsi148_bridge->driver_priv;
i = image->number;
switch (aspace) {
case VME_A16:
granularity = 0x10;
addr |= TSI148_LCSR_ITAT_AS_A16;
break;
case VME_A24:
granularity = 0x1000;
addr |= TSI148_LCSR_ITAT_AS_A24;
break;
case VME_A32:
granularity = 0x10000;
addr |= TSI148_LCSR_ITAT_AS_A32;
break;
case VME_A64:
granularity = 0x10000;
addr |= TSI148_LCSR_ITAT_AS_A64;
break;
default:
dev_err(tsi148_bridge->parent, "Invalid address space\n");
return -EINVAL;
break;
}
/* Convert 64-bit variables to 2x 32-bit variables */
reg_split(vme_base, &vme_base_high, &vme_base_low);
/*
* Bound address is a valid address for the window, adjust
* accordingly
*/
vme_bound = vme_base + size - granularity;
reg_split(vme_bound, &vme_bound_high, &vme_bound_low);
pci_offset = (unsigned long long)pci_base - vme_base;
reg_split(pci_offset, &pci_offset_high, &pci_offset_low);
if (vme_base_low & (granularity - 1)) {
dev_err(tsi148_bridge->parent, "Invalid VME base alignment\n");
return -EINVAL;
}
if (vme_bound_low & (granularity - 1)) {
dev_err(tsi148_bridge->parent, "Invalid VME bound alignment\n");
return -EINVAL;
}
if (pci_offset_low & (granularity - 1)) {
dev_err(tsi148_bridge->parent, "Invalid PCI Offset "
"alignment\n");
return -EINVAL;
}
/* Disable while we are mucking around */
temp_ctl = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITAT);
temp_ctl &= ~TSI148_LCSR_ITAT_EN;
iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITAT);
/* Setup mapping */
iowrite32be(vme_base_high, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITSAU);
iowrite32be(vme_base_low, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITSAL);
iowrite32be(vme_bound_high, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITEAU);
iowrite32be(vme_bound_low, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITEAL);
iowrite32be(pci_offset_high, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITOFU);
iowrite32be(pci_offset_low, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITOFL);
/* Setup 2eSST speeds */
temp_ctl &= ~TSI148_LCSR_ITAT_2eSSTM_M;
switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
case VME_2eSST160:
temp_ctl |= TSI148_LCSR_ITAT_2eSSTM_160;
break;
case VME_2eSST267:
temp_ctl |= TSI148_LCSR_ITAT_2eSSTM_267;
break;
case VME_2eSST320:
temp_ctl |= TSI148_LCSR_ITAT_2eSSTM_320;
break;
}
/* Setup cycle types */
temp_ctl &= ~(0x1F << 7);
if (cycle & VME_BLT)
temp_ctl |= TSI148_LCSR_ITAT_BLT;
if (cycle & VME_MBLT)
temp_ctl |= TSI148_LCSR_ITAT_MBLT;
if (cycle & VME_2eVME)
temp_ctl |= TSI148_LCSR_ITAT_2eVME;
if (cycle & VME_2eSST)
temp_ctl |= TSI148_LCSR_ITAT_2eSST;
if (cycle & VME_2eSSTB)
temp_ctl |= TSI148_LCSR_ITAT_2eSSTB;
/* Setup address space */
temp_ctl &= ~TSI148_LCSR_ITAT_AS_M;
temp_ctl |= addr;
temp_ctl &= ~0xF;
if (cycle & VME_SUPER)
temp_ctl |= TSI148_LCSR_ITAT_SUPR ;
if (cycle & VME_USER)
temp_ctl |= TSI148_LCSR_ITAT_NPRIV;
if (cycle & VME_PROG)
temp_ctl |= TSI148_LCSR_ITAT_PGM;
if (cycle & VME_DATA)
temp_ctl |= TSI148_LCSR_ITAT_DATA;
/* Write ctl reg without enable */
iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITAT);
if (enabled)
temp_ctl |= TSI148_LCSR_ITAT_EN;
iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITAT);
return 0;
}
/*
* Get slave window configuration.
*/
static int tsi148_slave_get(struct vme_slave_resource *image, int *enabled,
unsigned long long *vme_base, unsigned long long *size,
dma_addr_t *pci_base, u32 *aspace, u32 *cycle)
{
unsigned int i, granularity = 0, ctl = 0;
unsigned int vme_base_low, vme_base_high;
unsigned int vme_bound_low, vme_bound_high;
unsigned int pci_offset_low, pci_offset_high;
unsigned long long vme_bound, pci_offset;
struct tsi148_driver *bridge;
bridge = image->parent->driver_priv;
i = image->number;
/* Read registers */
ctl = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITAT);
vme_base_high = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITSAU);
vme_base_low = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITSAL);
vme_bound_high = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITEAU);
vme_bound_low = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITEAL);
pci_offset_high = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITOFU);
pci_offset_low = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITOFL);
/* Convert 64-bit variables to 2x 32-bit variables */
reg_join(vme_base_high, vme_base_low, vme_base);
reg_join(vme_bound_high, vme_bound_low, &vme_bound);
reg_join(pci_offset_high, pci_offset_low, &pci_offset);
*pci_base = (dma_addr_t)(*vme_base + pci_offset);
*enabled = 0;
*aspace = 0;
*cycle = 0;
if (ctl & TSI148_LCSR_ITAT_EN)
*enabled = 1;
if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A16) {
granularity = 0x10;
*aspace |= VME_A16;
}
if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A24) {
granularity = 0x1000;
*aspace |= VME_A24;
}
if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A32) {
granularity = 0x10000;
*aspace |= VME_A32;
}
if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A64) {
granularity = 0x10000;
*aspace |= VME_A64;
}
/* Need granularity before we set the size */
*size = (unsigned long long)((vme_bound - *vme_base) + granularity);
if ((ctl & TSI148_LCSR_ITAT_2eSSTM_M) == TSI148_LCSR_ITAT_2eSSTM_160)
*cycle |= VME_2eSST160;
if ((ctl & TSI148_LCSR_ITAT_2eSSTM_M) == TSI148_LCSR_ITAT_2eSSTM_267)
*cycle |= VME_2eSST267;
if ((ctl & TSI148_LCSR_ITAT_2eSSTM_M) == TSI148_LCSR_ITAT_2eSSTM_320)
*cycle |= VME_2eSST320;
if (ctl & TSI148_LCSR_ITAT_BLT)
*cycle |= VME_BLT;
if (ctl & TSI148_LCSR_ITAT_MBLT)
*cycle |= VME_MBLT;
if (ctl & TSI148_LCSR_ITAT_2eVME)
*cycle |= VME_2eVME;
if (ctl & TSI148_LCSR_ITAT_2eSST)
*cycle |= VME_2eSST;
if (ctl & TSI148_LCSR_ITAT_2eSSTB)
*cycle |= VME_2eSSTB;
if (ctl & TSI148_LCSR_ITAT_SUPR)
*cycle |= VME_SUPER;
if (ctl & TSI148_LCSR_ITAT_NPRIV)
*cycle |= VME_USER;
if (ctl & TSI148_LCSR_ITAT_PGM)
*cycle |= VME_PROG;
if (ctl & TSI148_LCSR_ITAT_DATA)
*cycle |= VME_DATA;
return 0;
}
/*
* Allocate and map PCI Resource
*/
static int tsi148_alloc_resource(struct vme_master_resource *image,
unsigned long long size)
{
unsigned long long existing_size;
int retval = 0;
struct pci_dev *pdev;
struct vme_bridge *tsi148_bridge;
tsi148_bridge = image->parent;
pdev = to_pci_dev(tsi148_bridge->parent);
existing_size = (unsigned long long)(image->bus_resource.end -
image->bus_resource.start);
/* If the existing size is OK, return */
if ((size != 0) && (existing_size == (size - 1)))
return 0;
if (existing_size != 0) {
iounmap(image->kern_base);
image->kern_base = NULL;
kfree(image->bus_resource.name);
release_resource(&image->bus_resource);
memset(&image->bus_resource, 0, sizeof(image->bus_resource));
}
/* Exit here if size is zero */
if (size == 0)
return 0;
if (!image->bus_resource.name) {
image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
if (!image->bus_resource.name) {
retval = -ENOMEM;
goto err_name;
}
}
sprintf((char *)image->bus_resource.name, "%s.%d", tsi148_bridge->name,
image->number);
image->bus_resource.start = 0;
image->bus_resource.end = (unsigned long)size;
image->bus_resource.flags = IORESOURCE_MEM;
retval = pci_bus_alloc_resource(pdev->bus,
&image->bus_resource, size, 0x10000, PCIBIOS_MIN_MEM,
0, NULL, NULL);
if (retval) {
dev_err(tsi148_bridge->parent, "Failed to allocate mem "
"resource for window %d size 0x%lx start 0x%lx\n",
image->number, (unsigned long)size,
(unsigned long)image->bus_resource.start);
goto err_resource;
}
image->kern_base = ioremap_nocache(
image->bus_resource.start, size);
if (!image->kern_base) {
dev_err(tsi148_bridge->parent, "Failed to remap resource\n");
retval = -ENOMEM;
goto err_remap;
}
return 0;
err_remap:
release_resource(&image->bus_resource);
err_resource:
kfree(image->bus_resource.name);
memset(&image->bus_resource, 0, sizeof(image->bus_resource));
err_name:
return retval;
}
/*
* Free and unmap PCI Resource
*/
static void tsi148_free_resource(struct vme_master_resource *image)
{
iounmap(image->kern_base);
image->kern_base = NULL;
release_resource(&image->bus_resource);
kfree(image->bus_resource.name);
memset(&image->bus_resource, 0, sizeof(image->bus_resource));
}
/*
* Set the attributes of an outbound window.
*/
static int tsi148_master_set(struct vme_master_resource *image, int enabled,
unsigned long long vme_base, unsigned long long size, u32 aspace,
u32 cycle, u32 dwidth)
{
int retval = 0;
unsigned int i;
unsigned int temp_ctl = 0;
unsigned int pci_base_low, pci_base_high;
unsigned int pci_bound_low, pci_bound_high;
unsigned int vme_offset_low, vme_offset_high;
unsigned long long pci_bound, vme_offset, pci_base;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
struct pci_bus_region region;
struct pci_dev *pdev;
tsi148_bridge = image->parent;
bridge = tsi148_bridge->driver_priv;
pdev = to_pci_dev(tsi148_bridge->parent);
/* Verify input data */
if (vme_base & 0xFFFF) {
dev_err(tsi148_bridge->parent, "Invalid VME Window "
"alignment\n");
retval = -EINVAL;
goto err_window;
}
if ((size == 0) && (enabled != 0)) {
dev_err(tsi148_bridge->parent, "Size must be non-zero for "
"enabled windows\n");
retval = -EINVAL;
goto err_window;
}
spin_lock(&image->lock);
/* Let's allocate the resource here rather than further up the stack as
* it avoids pushing loads of bus dependent stuff up the stack. If size
* is zero, any existing resource will be freed.
*/
retval = tsi148_alloc_resource(image, size);
if (retval) {
spin_unlock(&image->lock);
dev_err(tsi148_bridge->parent, "Unable to allocate memory for "
"resource\n");
goto err_res;
}
if (size == 0) {
pci_base = 0;
pci_bound = 0;
vme_offset = 0;
} else {
pcibios_resource_to_bus(pdev->bus, &region,
&image->bus_resource);
pci_base = region.start;
/*
* Bound address is a valid address for the window, adjust
* according to window granularity.
*/
pci_bound = pci_base + (size - 0x10000);
vme_offset = vme_base - pci_base;
}
/* Convert 64-bit variables to 2x 32-bit variables */
reg_split(pci_base, &pci_base_high, &pci_base_low);
reg_split(pci_bound, &pci_bound_high, &pci_bound_low);
reg_split(vme_offset, &vme_offset_high, &vme_offset_low);
if (pci_base_low & 0xFFFF) {
spin_unlock(&image->lock);
dev_err(tsi148_bridge->parent, "Invalid PCI base alignment\n");
retval = -EINVAL;
goto err_gran;
}
if (pci_bound_low & 0xFFFF) {
spin_unlock(&image->lock);
dev_err(tsi148_bridge->parent, "Invalid PCI bound alignment\n");
retval = -EINVAL;
goto err_gran;
}
if (vme_offset_low & 0xFFFF) {
spin_unlock(&image->lock);
dev_err(tsi148_bridge->parent, "Invalid VME Offset "
"alignment\n");
retval = -EINVAL;
goto err_gran;
}
i = image->number;
/* Disable while we are mucking around */
temp_ctl = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTAT);
temp_ctl &= ~TSI148_LCSR_OTAT_EN;
iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTAT);
/* Setup 2eSST speeds */
temp_ctl &= ~TSI148_LCSR_OTAT_2eSSTM_M;
switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
case VME_2eSST160:
temp_ctl |= TSI148_LCSR_OTAT_2eSSTM_160;
break;
case VME_2eSST267:
temp_ctl |= TSI148_LCSR_OTAT_2eSSTM_267;
break;
case VME_2eSST320:
temp_ctl |= TSI148_LCSR_OTAT_2eSSTM_320;
break;
}
/* Setup cycle types */
if (cycle & VME_BLT) {
temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
temp_ctl |= TSI148_LCSR_OTAT_TM_BLT;
}
if (cycle & VME_MBLT) {
temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
temp_ctl |= TSI148_LCSR_OTAT_TM_MBLT;
}
if (cycle & VME_2eVME) {
temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
temp_ctl |= TSI148_LCSR_OTAT_TM_2eVME;
}
if (cycle & VME_2eSST) {
temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
temp_ctl |= TSI148_LCSR_OTAT_TM_2eSST;
}
if (cycle & VME_2eSSTB) {
dev_warn(tsi148_bridge->parent, "Currently not setting "
"Broadcast Select Registers\n");
temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
temp_ctl |= TSI148_LCSR_OTAT_TM_2eSSTB;
}
/* Setup data width */
temp_ctl &= ~TSI148_LCSR_OTAT_DBW_M;
switch (dwidth) {
case VME_D16:
temp_ctl |= TSI148_LCSR_OTAT_DBW_16;
break;
case VME_D32:
temp_ctl |= TSI148_LCSR_OTAT_DBW_32;
break;
default:
spin_unlock(&image->lock);
dev_err(tsi148_bridge->parent, "Invalid data width\n");
retval = -EINVAL;
goto err_dwidth;
}
/* Setup address space */
temp_ctl &= ~TSI148_LCSR_OTAT_AMODE_M;
switch (aspace) {
case VME_A16:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_A16;
break;
case VME_A24:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_A24;
break;
case VME_A32:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_A32;
break;
case VME_A64:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_A64;
break;
case VME_CRCSR:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_CRCSR;
break;
case VME_USER1:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER1;
break;
case VME_USER2:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER2;
break;
case VME_USER3:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER3;
break;
case VME_USER4:
temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER4;
break;
default:
spin_unlock(&image->lock);
dev_err(tsi148_bridge->parent, "Invalid address space\n");
retval = -EINVAL;
goto err_aspace;
break;
}
temp_ctl &= ~(3<<4);
if (cycle & VME_SUPER)
temp_ctl |= TSI148_LCSR_OTAT_SUP;
if (cycle & VME_PROG)
temp_ctl |= TSI148_LCSR_OTAT_PGM;
/* Setup mapping */
iowrite32be(pci_base_high, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTSAU);
iowrite32be(pci_base_low, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTSAL);
iowrite32be(pci_bound_high, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTEAU);
iowrite32be(pci_bound_low, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTEAL);
iowrite32be(vme_offset_high, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTOFU);
iowrite32be(vme_offset_low, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTOFL);
/* Write ctl reg without enable */
iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTAT);
if (enabled)
temp_ctl |= TSI148_LCSR_OTAT_EN;
iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTAT);
spin_unlock(&image->lock);
return 0;
err_aspace:
err_dwidth:
err_gran:
tsi148_free_resource(image);
err_res:
err_window:
return retval;
}
/*
* Set the attributes of an outbound window.
*
* XXX Not parsing prefetch information.
*/
static int __tsi148_master_get(struct vme_master_resource *image, int *enabled,
unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
u32 *cycle, u32 *dwidth)
{
unsigned int i, ctl;
unsigned int pci_base_low, pci_base_high;
unsigned int pci_bound_low, pci_bound_high;
unsigned int vme_offset_low, vme_offset_high;
unsigned long long pci_base, pci_bound, vme_offset;
struct tsi148_driver *bridge;
bridge = image->parent->driver_priv;
i = image->number;
ctl = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTAT);
pci_base_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTSAU);
pci_base_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTSAL);
pci_bound_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTEAU);
pci_bound_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTEAL);
vme_offset_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTOFU);
vme_offset_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTOFL);
/* Convert 64-bit variables to 2x 32-bit variables */
reg_join(pci_base_high, pci_base_low, &pci_base);
reg_join(pci_bound_high, pci_bound_low, &pci_bound);
reg_join(vme_offset_high, vme_offset_low, &vme_offset);
*vme_base = pci_base + vme_offset;
*size = (unsigned long long)(pci_bound - pci_base) + 0x10000;
*enabled = 0;
*aspace = 0;
*cycle = 0;
*dwidth = 0;
if (ctl & TSI148_LCSR_OTAT_EN)
*enabled = 1;
/* Setup address space */
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A16)
*aspace |= VME_A16;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A24)
*aspace |= VME_A24;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A32)
*aspace |= VME_A32;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A64)
*aspace |= VME_A64;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_CRCSR)
*aspace |= VME_CRCSR;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER1)
*aspace |= VME_USER1;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER2)
*aspace |= VME_USER2;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER3)
*aspace |= VME_USER3;
if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER4)
*aspace |= VME_USER4;
/* Setup 2eSST speeds */
if ((ctl & TSI148_LCSR_OTAT_2eSSTM_M) == TSI148_LCSR_OTAT_2eSSTM_160)
*cycle |= VME_2eSST160;
if ((ctl & TSI148_LCSR_OTAT_2eSSTM_M) == TSI148_LCSR_OTAT_2eSSTM_267)
*cycle |= VME_2eSST267;
if ((ctl & TSI148_LCSR_OTAT_2eSSTM_M) == TSI148_LCSR_OTAT_2eSSTM_320)
*cycle |= VME_2eSST320;
/* Setup cycle types */
if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_SCT)
*cycle |= VME_SCT;
if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_BLT)
*cycle |= VME_BLT;
if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_MBLT)
*cycle |= VME_MBLT;
if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_2eVME)
*cycle |= VME_2eVME;
if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_2eSST)
*cycle |= VME_2eSST;
if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_2eSSTB)
*cycle |= VME_2eSSTB;
if (ctl & TSI148_LCSR_OTAT_SUP)
*cycle |= VME_SUPER;
else
*cycle |= VME_USER;
if (ctl & TSI148_LCSR_OTAT_PGM)
*cycle |= VME_PROG;
else
*cycle |= VME_DATA;
/* Setup data width */
if ((ctl & TSI148_LCSR_OTAT_DBW_M) == TSI148_LCSR_OTAT_DBW_16)
*dwidth = VME_D16;
if ((ctl & TSI148_LCSR_OTAT_DBW_M) == TSI148_LCSR_OTAT_DBW_32)
*dwidth = VME_D32;
return 0;
}
static int tsi148_master_get(struct vme_master_resource *image, int *enabled,
unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
u32 *cycle, u32 *dwidth)
{
int retval;
spin_lock(&image->lock);
retval = __tsi148_master_get(image, enabled, vme_base, size, aspace,
cycle, dwidth);
spin_unlock(&image->lock);
return retval;
}
static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf,
size_t count, loff_t offset)
{
int retval, enabled;
unsigned long long vme_base, size;
u32 aspace, cycle, dwidth;
struct vme_error_handler *handler = NULL;
struct vme_bridge *tsi148_bridge;
void __iomem *addr = image->kern_base + offset;
unsigned int done = 0;
unsigned int count32;
tsi148_bridge = image->parent;
spin_lock(&image->lock);
if (err_chk) {
__tsi148_master_get(image, &enabled, &vme_base, &size, &aspace,
&cycle, &dwidth);
handler = vme_register_error_handler(tsi148_bridge, aspace,
vme_base + offset, count);
if (!handler) {
spin_unlock(&image->lock);
return -ENOMEM;
}
}
/* The following code handles VME address alignment. We cannot use
* memcpy_xxx here because it may cut data transfers in to 8-bit
* cycles when D16 or D32 cycles are required on the VME bus.
* On the other hand, the bridge itself assures that the maximum data
* cycle configured for the transfer is used and splits it
* automatically for non-aligned addresses, so we don't want the
* overhead of needlessly forcing small transfers for the entire cycle.
*/
if ((uintptr_t)addr & 0x1) {
*(u8 *)buf = ioread8(addr);
done += 1;
if (done == count)
goto out;
}
if ((uintptr_t)(addr + done) & 0x2) {
if ((count - done) < 2) {
*(u8 *)(buf + done) = ioread8(addr + done);
done += 1;
goto out;
} else {
*(u16 *)(buf + done) = ioread16(addr + done);
done += 2;
}
}
count32 = (count - done) & ~0x3;
while (done < count32) {
*(u32 *)(buf + done) = ioread32(addr + done);
done += 4;
}
if ((count - done) & 0x2) {
*(u16 *)(buf + done) = ioread16(addr + done);
done += 2;
}
if ((count - done) & 0x1) {
*(u8 *)(buf + done) = ioread8(addr + done);
done += 1;
}
out:
retval = count;
if (err_chk) {
if (handler->num_errors) {
dev_err(image->parent->parent,
"First VME read error detected an at address 0x%llx\n",
handler->first_error);
retval = handler->first_error - (vme_base + offset);
}
vme_unregister_error_handler(handler);
}
spin_unlock(&image->lock);
return retval;
}
static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf,
size_t count, loff_t offset)
{
int retval = 0, enabled;
unsigned long long vme_base, size;
u32 aspace, cycle, dwidth;
void __iomem *addr = image->kern_base + offset;
unsigned int done = 0;
unsigned int count32;
struct vme_error_handler *handler = NULL;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
tsi148_bridge = image->parent;
bridge = tsi148_bridge->driver_priv;
spin_lock(&image->lock);
if (err_chk) {
__tsi148_master_get(image, &enabled, &vme_base, &size, &aspace,
&cycle, &dwidth);
handler = vme_register_error_handler(tsi148_bridge, aspace,
vme_base + offset, count);
if (!handler) {
spin_unlock(&image->lock);
return -ENOMEM;
}
}
/* Here we apply for the same strategy we do in master_read
* function in order to assure the correct cycles.
*/
if ((uintptr_t)addr & 0x1) {
iowrite8(*(u8 *)buf, addr);
done += 1;
if (done == count)
goto out;
}
if ((uintptr_t)(addr + done) & 0x2) {
if ((count - done) < 2) {
iowrite8(*(u8 *)(buf + done), addr + done);
done += 1;
goto out;
} else {
iowrite16(*(u16 *)(buf + done), addr + done);
done += 2;
}
}
count32 = (count - done) & ~0x3;
while (done < count32) {
iowrite32(*(u32 *)(buf + done), addr + done);
done += 4;
}
if ((count - done) & 0x2) {
iowrite16(*(u16 *)(buf + done), addr + done);
done += 2;
}
if ((count - done) & 0x1) {
iowrite8(*(u8 *)(buf + done), addr + done);
done += 1;
}
out:
retval = count;
/*
* Writes are posted. We need to do a read on the VME bus to flush out
* all of the writes before we check for errors. We can't guarantee
* that reading the data we have just written is safe. It is believed
* that there isn't any read, write re-ordering, so we can read any
* location in VME space, so lets read the Device ID from the tsi148's
* own registers as mapped into CR/CSR space.
*
* We check for saved errors in the written address range/space.
*/
if (err_chk) {
ioread16(bridge->flush_image->kern_base + 0x7F000);
if (handler->num_errors) {
dev_warn(tsi148_bridge->parent,
"First VME write error detected an at address 0x%llx\n",
handler->first_error);
retval = handler->first_error - (vme_base + offset);
}
vme_unregister_error_handler(handler);
}
spin_unlock(&image->lock);
return retval;
}
/*
* Perform an RMW cycle on the VME bus.
*
* Requires a previously configured master window, returns final value.
*/
static unsigned int tsi148_master_rmw(struct vme_master_resource *image,
unsigned int mask, unsigned int compare, unsigned int swap,
loff_t offset)
{
unsigned long long pci_addr;
unsigned int pci_addr_high, pci_addr_low;
u32 tmp, result;
int i;
struct tsi148_driver *bridge;
bridge = image->parent->driver_priv;
/* Find the PCI address that maps to the desired VME address */
i = image->number;
/* Locking as we can only do one of these at a time */
mutex_lock(&bridge->vme_rmw);
/* Lock image */
spin_lock(&image->lock);
pci_addr_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTSAU);
pci_addr_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTSAL);
reg_join(pci_addr_high, pci_addr_low, &pci_addr);
reg_split(pci_addr + offset, &pci_addr_high, &pci_addr_low);
/* Configure registers */
iowrite32be(mask, bridge->base + TSI148_LCSR_RMWEN);
iowrite32be(compare, bridge->base + TSI148_LCSR_RMWC);
iowrite32be(swap, bridge->base + TSI148_LCSR_RMWS);
iowrite32be(pci_addr_high, bridge->base + TSI148_LCSR_RMWAU);
iowrite32be(pci_addr_low, bridge->base + TSI148_LCSR_RMWAL);
/* Enable RMW */
tmp = ioread32be(bridge->base + TSI148_LCSR_VMCTRL);
tmp |= TSI148_LCSR_VMCTRL_RMWEN;
iowrite32be(tmp, bridge->base + TSI148_LCSR_VMCTRL);
/* Kick process off with a read to the required address. */
result = ioread32be(image->kern_base + offset);
/* Disable RMW */
tmp = ioread32be(bridge->base + TSI148_LCSR_VMCTRL);
tmp &= ~TSI148_LCSR_VMCTRL_RMWEN;
iowrite32be(tmp, bridge->base + TSI148_LCSR_VMCTRL);
spin_unlock(&image->lock);
mutex_unlock(&bridge->vme_rmw);
return result;
}
static int tsi148_dma_set_vme_src_attributes(struct device *dev, __be32 *attr,
u32 aspace, u32 cycle, u32 dwidth)
{
u32 val;
val = be32_to_cpu(*attr);
/* Setup 2eSST speeds */
switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
case VME_2eSST160:
val |= TSI148_LCSR_DSAT_2eSSTM_160;
break;
case VME_2eSST267:
val |= TSI148_LCSR_DSAT_2eSSTM_267;
break;
case VME_2eSST320:
val |= TSI148_LCSR_DSAT_2eSSTM_320;
break;
}
/* Setup cycle types */
if (cycle & VME_SCT)
val |= TSI148_LCSR_DSAT_TM_SCT;
if (cycle & VME_BLT)
val |= TSI148_LCSR_DSAT_TM_BLT;
if (cycle & VME_MBLT)
val |= TSI148_LCSR_DSAT_TM_MBLT;
if (cycle & VME_2eVME)
val |= TSI148_LCSR_DSAT_TM_2eVME;
if (cycle & VME_2eSST)
val |= TSI148_LCSR_DSAT_TM_2eSST;
if (cycle & VME_2eSSTB) {
dev_err(dev, "Currently not setting Broadcast Select "
"Registers\n");
val |= TSI148_LCSR_DSAT_TM_2eSSTB;
}
/* Setup data width */
switch (dwidth) {
case VME_D16:
val |= TSI148_LCSR_DSAT_DBW_16;
break;
case VME_D32:
val |= TSI148_LCSR_DSAT_DBW_32;
break;
default:
dev_err(dev, "Invalid data width\n");
return -EINVAL;
}
/* Setup address space */
switch (aspace) {
case VME_A16:
val |= TSI148_LCSR_DSAT_AMODE_A16;
break;
case VME_A24:
val |= TSI148_LCSR_DSAT_AMODE_A24;
break;
case VME_A32:
val |= TSI148_LCSR_DSAT_AMODE_A32;
break;
case VME_A64:
val |= TSI148_LCSR_DSAT_AMODE_A64;
break;
case VME_CRCSR:
val |= TSI148_LCSR_DSAT_AMODE_CRCSR;
break;
case VME_USER1:
val |= TSI148_LCSR_DSAT_AMODE_USER1;
break;
case VME_USER2:
val |= TSI148_LCSR_DSAT_AMODE_USER2;
break;
case VME_USER3:
val |= TSI148_LCSR_DSAT_AMODE_USER3;
break;
case VME_USER4:
val |= TSI148_LCSR_DSAT_AMODE_USER4;
break;
default:
dev_err(dev, "Invalid address space\n");
return -EINVAL;
break;
}
if (cycle & VME_SUPER)
val |= TSI148_LCSR_DSAT_SUP;
if (cycle & VME_PROG)
val |= TSI148_LCSR_DSAT_PGM;
*attr = cpu_to_be32(val);
return 0;
}
static int tsi148_dma_set_vme_dest_attributes(struct device *dev, __be32 *attr,
u32 aspace, u32 cycle, u32 dwidth)
{
u32 val;
val = be32_to_cpu(*attr);
/* Setup 2eSST speeds */
switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
case VME_2eSST160:
val |= TSI148_LCSR_DDAT_2eSSTM_160;
break;
case VME_2eSST267:
val |= TSI148_LCSR_DDAT_2eSSTM_267;
break;
case VME_2eSST320:
val |= TSI148_LCSR_DDAT_2eSSTM_320;
break;
}
/* Setup cycle types */
if (cycle & VME_SCT)
val |= TSI148_LCSR_DDAT_TM_SCT;
if (cycle & VME_BLT)
val |= TSI148_LCSR_DDAT_TM_BLT;
if (cycle & VME_MBLT)
val |= TSI148_LCSR_DDAT_TM_MBLT;
if (cycle & VME_2eVME)
val |= TSI148_LCSR_DDAT_TM_2eVME;
if (cycle & VME_2eSST)
val |= TSI148_LCSR_DDAT_TM_2eSST;
if (cycle & VME_2eSSTB) {
dev_err(dev, "Currently not setting Broadcast Select "
"Registers\n");
val |= TSI148_LCSR_DDAT_TM_2eSSTB;
}
/* Setup data width */
switch (dwidth) {
case VME_D16:
val |= TSI148_LCSR_DDAT_DBW_16;
break;
case VME_D32:
val |= TSI148_LCSR_DDAT_DBW_32;
break;
default:
dev_err(dev, "Invalid data width\n");
return -EINVAL;
}
/* Setup address space */
switch (aspace) {
case VME_A16:
val |= TSI148_LCSR_DDAT_AMODE_A16;
break;
case VME_A24:
val |= TSI148_LCSR_DDAT_AMODE_A24;
break;
case VME_A32:
val |= TSI148_LCSR_DDAT_AMODE_A32;
break;
case VME_A64:
val |= TSI148_LCSR_DDAT_AMODE_A64;
break;
case VME_CRCSR:
val |= TSI148_LCSR_DDAT_AMODE_CRCSR;
break;
case VME_USER1:
val |= TSI148_LCSR_DDAT_AMODE_USER1;
break;
case VME_USER2:
val |= TSI148_LCSR_DDAT_AMODE_USER2;
break;
case VME_USER3:
val |= TSI148_LCSR_DDAT_AMODE_USER3;
break;
case VME_USER4:
val |= TSI148_LCSR_DDAT_AMODE_USER4;
break;
default:
dev_err(dev, "Invalid address space\n");
return -EINVAL;
break;
}
if (cycle & VME_SUPER)
val |= TSI148_LCSR_DDAT_SUP;
if (cycle & VME_PROG)
val |= TSI148_LCSR_DDAT_PGM;
*attr = cpu_to_be32(val);
return 0;
}
/*
* Add a link list descriptor to the list
*
* Note: DMA engine expects the DMA descriptor to be big endian.
*/
static int tsi148_dma_list_add(struct vme_dma_list *list,
struct vme_dma_attr *src, struct vme_dma_attr *dest, size_t count)
{
struct tsi148_dma_entry *entry, *prev;
u32 address_high, address_low, val;
struct vme_dma_pattern *pattern_attr;
struct vme_dma_pci *pci_attr;
struct vme_dma_vme *vme_attr;
int retval = 0;
struct vme_bridge *tsi148_bridge;
tsi148_bridge = list->parent->parent;
/* Descriptor must be aligned on 64-bit boundaries */
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) {
retval = -ENOMEM;
goto err_mem;
}
/* Test descriptor alignment */
if ((unsigned long)&entry->descriptor & 0x7) {
dev_err(tsi148_bridge->parent, "Descriptor not aligned to 8 "
"byte boundary as required: %p\n",
&entry->descriptor);
retval = -EINVAL;
goto err_align;
}
/* Given we are going to fill out the structure, we probably don't
* need to zero it, but better safe than sorry for now.
*/
memset(&entry->descriptor, 0, sizeof(entry->descriptor));
/* Fill out source part */
switch (src->type) {
case VME_DMA_PATTERN:
pattern_attr = src->private;
entry->descriptor.dsal = cpu_to_be32(pattern_attr->pattern);
val = TSI148_LCSR_DSAT_TYP_PAT;
/* Default behaviour is 32 bit pattern */
if (pattern_attr->type & VME_DMA_PATTERN_BYTE)
val |= TSI148_LCSR_DSAT_PSZ;
/* It seems that the default behaviour is to increment */
if ((pattern_attr->type & VME_DMA_PATTERN_INCREMENT) == 0)
val |= TSI148_LCSR_DSAT_NIN;
entry->descriptor.dsat = cpu_to_be32(val);
break;
case VME_DMA_PCI:
pci_attr = src->private;
reg_split((unsigned long long)pci_attr->address, &address_high,
&address_low);
entry->descriptor.dsau = cpu_to_be32(address_high);
entry->descriptor.dsal = cpu_to_be32(address_low);
entry->descriptor.dsat = cpu_to_be32(TSI148_LCSR_DSAT_TYP_PCI);
break;
case VME_DMA_VME:
vme_attr = src->private;
reg_split((unsigned long long)vme_attr->address, &address_high,
&address_low);
entry->descriptor.dsau = cpu_to_be32(address_high);
entry->descriptor.dsal = cpu_to_be32(address_low);
entry->descriptor.dsat = cpu_to_be32(TSI148_LCSR_DSAT_TYP_VME);
retval = tsi148_dma_set_vme_src_attributes(
tsi148_bridge->parent, &entry->descriptor.dsat,
vme_attr->aspace, vme_attr->cycle, vme_attr->dwidth);
if (retval < 0)
goto err_source;
break;
default:
dev_err(tsi148_bridge->parent, "Invalid source type\n");
retval = -EINVAL;
goto err_source;
break;
}
/* Assume last link - this will be over-written by adding another */
entry->descriptor.dnlau = cpu_to_be32(0);
entry->descriptor.dnlal = cpu_to_be32(TSI148_LCSR_DNLAL_LLA);
/* Fill out destination part */
switch (dest->type) {
case VME_DMA_PCI:
pci_attr = dest->private;
reg_split((unsigned long long)pci_attr->address, &address_high,
&address_low);
entry->descriptor.ddau = cpu_to_be32(address_high);
entry->descriptor.ddal = cpu_to_be32(address_low);
entry->descriptor.ddat = cpu_to_be32(TSI148_LCSR_DDAT_TYP_PCI);
break;
case VME_DMA_VME:
vme_attr = dest->private;
reg_split((unsigned long long)vme_attr->address, &address_high,
&address_low);
entry->descriptor.ddau = cpu_to_be32(address_high);
entry->descriptor.ddal = cpu_to_be32(address_low);
entry->descriptor.ddat = cpu_to_be32(TSI148_LCSR_DDAT_TYP_VME);
retval = tsi148_dma_set_vme_dest_attributes(
tsi148_bridge->parent, &entry->descriptor.ddat,
vme_attr->aspace, vme_attr->cycle, vme_attr->dwidth);
if (retval < 0)
goto err_dest;
break;
default:
dev_err(tsi148_bridge->parent, "Invalid destination type\n");
retval = -EINVAL;
goto err_dest;
break;
}
/* Fill out count */
entry->descriptor.dcnt = cpu_to_be32((u32)count);
/* Add to list */
list_add_tail(&entry->list, &list->entries);
entry->dma_handle = dma_map_single(tsi148_bridge->parent,
&entry->descriptor,
sizeof(entry->descriptor),
DMA_TO_DEVICE);
if (dma_mapping_error(tsi148_bridge->parent, entry->dma_handle)) {
dev_err(tsi148_bridge->parent, "DMA mapping error\n");
retval = -EINVAL;
goto err_dma;
}
/* Fill out previous descriptors "Next Address" */
if (entry->list.prev != &list->entries) {
reg_split((unsigned long long)entry->dma_handle, &address_high,
&address_low);
prev = list_entry(entry->list.prev, struct tsi148_dma_entry,
list);
prev->descriptor.dnlau = cpu_to_be32(address_high);
prev->descriptor.dnlal = cpu_to_be32(address_low);
}
return 0;
err_dma:
err_dest:
err_source:
err_align:
kfree(entry);
err_mem:
return retval;
}
/*
* Check to see if the provided DMA channel is busy.
*/
static int tsi148_dma_busy(struct vme_bridge *tsi148_bridge, int channel)
{
u32 tmp;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
tmp = ioread32be(bridge->base + TSI148_LCSR_DMA[channel] +
TSI148_LCSR_OFFSET_DSTA);
if (tmp & TSI148_LCSR_DSTA_BSY)
return 0;
else
return 1;
}
/*
* Execute a previously generated link list
*
* XXX Need to provide control register configuration.
*/
static int tsi148_dma_list_exec(struct vme_dma_list *list)
{
struct vme_dma_resource *ctrlr;
int channel, retval;
struct tsi148_dma_entry *entry;
u32 bus_addr_high, bus_addr_low;
u32 val, dctlreg = 0;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
ctrlr = list->parent;
tsi148_bridge = ctrlr->parent;
bridge = tsi148_bridge->driver_priv;
mutex_lock(&ctrlr->mtx);
channel = ctrlr->number;
if (!list_empty(&ctrlr->running)) {
/*
* XXX We have an active DMA transfer and currently haven't
* sorted out the mechanism for "pending" DMA transfers.
* Return busy.
*/
/* Need to add to pending here */
mutex_unlock(&ctrlr->mtx);
return -EBUSY;
} else {
list_add(&list->list, &ctrlr->running);
}
/* Get first bus address and write into registers */
entry = list_first_entry(&list->entries, struct tsi148_dma_entry,
list);
mutex_unlock(&ctrlr->mtx);
reg_split(entry->dma_handle, &bus_addr_high, &bus_addr_low);
iowrite32be(bus_addr_high, bridge->base +
TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DNLAU);
iowrite32be(bus_addr_low, bridge->base +
TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DNLAL);
dctlreg = ioread32be(bridge->base + TSI148_LCSR_DMA[channel] +
TSI148_LCSR_OFFSET_DCTL);
/* Start the operation */
iowrite32be(dctlreg | TSI148_LCSR_DCTL_DGO, bridge->base +
TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DCTL);
retval = wait_event_interruptible(bridge->dma_queue[channel],
tsi148_dma_busy(ctrlr->parent, channel));
if (retval) {
iowrite32be(dctlreg | TSI148_LCSR_DCTL_ABT, bridge->base +
TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DCTL);
/* Wait for the operation to abort */
wait_event(bridge->dma_queue[channel],
tsi148_dma_busy(ctrlr->parent, channel));
retval = -EINTR;
goto exit;
}
/*
* Read status register, this register is valid until we kick off a
* new transfer.
*/
val = ioread32be(bridge->base + TSI148_LCSR_DMA[channel] +
TSI148_LCSR_OFFSET_DSTA);
if (val & TSI148_LCSR_DSTA_VBE) {
dev_err(tsi148_bridge->parent, "DMA Error. DSTA=%08X\n", val);
retval = -EIO;
}
exit:
/* Remove list from running list */
mutex_lock(&ctrlr->mtx);
list_del(&list->list);
mutex_unlock(&ctrlr->mtx);
return retval;
}
/*
* Clean up a previously generated link list
*
* We have a separate function, don't assume that the chain can't be reused.
*/
static int tsi148_dma_list_empty(struct vme_dma_list *list)
{
struct list_head *pos, *temp;
struct tsi148_dma_entry *entry;
struct vme_bridge *tsi148_bridge = list->parent->parent;
/* detach and free each entry */
list_for_each_safe(pos, temp, &list->entries) {
list_del(pos);
entry = list_entry(pos, struct tsi148_dma_entry, list);
dma_unmap_single(tsi148_bridge->parent, entry->dma_handle,
sizeof(struct tsi148_dma_descriptor), DMA_TO_DEVICE);
kfree(entry);
}
return 0;
}
/*
* All 4 location monitors reside at the same base - this is therefore a
* system wide configuration.
*
* This does not enable the LM monitor - that should be done when the first
* callback is attached and disabled when the last callback is removed.
*/
static int tsi148_lm_set(struct vme_lm_resource *lm, unsigned long long lm_base,
u32 aspace, u32 cycle)
{
u32 lm_base_high, lm_base_low, lm_ctl = 0;
int i;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
tsi148_bridge = lm->parent;
bridge = tsi148_bridge->driver_priv;
mutex_lock(&lm->mtx);
/* If we already have a callback attached, we can't move it! */
for (i = 0; i < lm->monitors; i++) {
if (bridge->lm_callback[i]) {
mutex_unlock(&lm->mtx);
dev_err(tsi148_bridge->parent, "Location monitor "
"callback attached, can't reset\n");
return -EBUSY;
}
}
switch (aspace) {
case VME_A16:
lm_ctl |= TSI148_LCSR_LMAT_AS_A16;
break;
case VME_A24:
lm_ctl |= TSI148_LCSR_LMAT_AS_A24;
break;
case VME_A32:
lm_ctl |= TSI148_LCSR_LMAT_AS_A32;
break;
case VME_A64:
lm_ctl |= TSI148_LCSR_LMAT_AS_A64;
break;
default:
mutex_unlock(&lm->mtx);
dev_err(tsi148_bridge->parent, "Invalid address space\n");
return -EINVAL;
break;
}
if (cycle & VME_SUPER)
lm_ctl |= TSI148_LCSR_LMAT_SUPR ;
if (cycle & VME_USER)
lm_ctl |= TSI148_LCSR_LMAT_NPRIV;
if (cycle & VME_PROG)
lm_ctl |= TSI148_LCSR_LMAT_PGM;
if (cycle & VME_DATA)
lm_ctl |= TSI148_LCSR_LMAT_DATA;
reg_split(lm_base, &lm_base_high, &lm_base_low);
iowrite32be(lm_base_high, bridge->base + TSI148_LCSR_LMBAU);
iowrite32be(lm_base_low, bridge->base + TSI148_LCSR_LMBAL);
iowrite32be(lm_ctl, bridge->base + TSI148_LCSR_LMAT);
mutex_unlock(&lm->mtx);
return 0;
}
/* Get configuration of the callback monitor and return whether it is enabled
* or disabled.
*/
static int tsi148_lm_get(struct vme_lm_resource *lm,
unsigned long long *lm_base, u32 *aspace, u32 *cycle)
{
u32 lm_base_high, lm_base_low, lm_ctl, enabled = 0;
struct tsi148_driver *bridge;
bridge = lm->parent->driver_priv;
mutex_lock(&lm->mtx);
lm_base_high = ioread32be(bridge->base + TSI148_LCSR_LMBAU);
lm_base_low = ioread32be(bridge->base + TSI148_LCSR_LMBAL);
lm_ctl = ioread32be(bridge->base + TSI148_LCSR_LMAT);
reg_join(lm_base_high, lm_base_low, lm_base);
if (lm_ctl & TSI148_LCSR_LMAT_EN)
enabled = 1;
if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A16)
*aspace |= VME_A16;
if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A24)
*aspace |= VME_A24;
if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A32)
*aspace |= VME_A32;
if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A64)
*aspace |= VME_A64;
if (lm_ctl & TSI148_LCSR_LMAT_SUPR)
*cycle |= VME_SUPER;
if (lm_ctl & TSI148_LCSR_LMAT_NPRIV)
*cycle |= VME_USER;
if (lm_ctl & TSI148_LCSR_LMAT_PGM)
*cycle |= VME_PROG;
if (lm_ctl & TSI148_LCSR_LMAT_DATA)
*cycle |= VME_DATA;
mutex_unlock(&lm->mtx);
return enabled;
}
/*
* Attach a callback to a specific location monitor.
*
* Callback will be passed the monitor triggered.
*/
static int tsi148_lm_attach(struct vme_lm_resource *lm, int monitor,
void (*callback)(void *), void *data)
{
u32 lm_ctl, tmp;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *bridge;
tsi148_bridge = lm->parent;
bridge = tsi148_bridge->driver_priv;
mutex_lock(&lm->mtx);
/* Ensure that the location monitor is configured - need PGM or DATA */
lm_ctl = ioread32be(bridge->base + TSI148_LCSR_LMAT);
if ((lm_ctl & (TSI148_LCSR_LMAT_PGM | TSI148_LCSR_LMAT_DATA)) == 0) {
mutex_unlock(&lm->mtx);
dev_err(tsi148_bridge->parent, "Location monitor not properly "
"configured\n");
return -EINVAL;
}
/* Check that a callback isn't already attached */
if (bridge->lm_callback[monitor]) {
mutex_unlock(&lm->mtx);
dev_err(tsi148_bridge->parent, "Existing callback attached\n");
return -EBUSY;
}
/* Attach callback */
bridge->lm_callback[monitor] = callback;
bridge->lm_data[monitor] = data;
/* Enable Location Monitor interrupt */
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEN);
tmp |= TSI148_LCSR_INTEN_LMEN[monitor];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
tmp |= TSI148_LCSR_INTEO_LMEO[monitor];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
/* Ensure that global Location Monitor Enable set */
if ((lm_ctl & TSI148_LCSR_LMAT_EN) == 0) {
lm_ctl |= TSI148_LCSR_LMAT_EN;
iowrite32be(lm_ctl, bridge->base + TSI148_LCSR_LMAT);
}
mutex_unlock(&lm->mtx);
return 0;
}
/*
* Detach a callback function forn a specific location monitor.
*/
static int tsi148_lm_detach(struct vme_lm_resource *lm, int monitor)
{
u32 lm_en, tmp;
struct tsi148_driver *bridge;
bridge = lm->parent->driver_priv;
mutex_lock(&lm->mtx);
/* Disable Location Monitor and ensure previous interrupts are clear */
lm_en = ioread32be(bridge->base + TSI148_LCSR_INTEN);
lm_en &= ~TSI148_LCSR_INTEN_LMEN[monitor];
iowrite32be(lm_en, bridge->base + TSI148_LCSR_INTEN);
tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
tmp &= ~TSI148_LCSR_INTEO_LMEO[monitor];
iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
iowrite32be(TSI148_LCSR_INTC_LMC[monitor],
bridge->base + TSI148_LCSR_INTC);
/* Detach callback */
bridge->lm_callback[monitor] = NULL;
bridge->lm_data[monitor] = NULL;
/* If all location monitors disabled, disable global Location Monitor */
if ((lm_en & (TSI148_LCSR_INTS_LM0S | TSI148_LCSR_INTS_LM1S |
TSI148_LCSR_INTS_LM2S | TSI148_LCSR_INTS_LM3S)) == 0) {
tmp = ioread32be(bridge->base + TSI148_LCSR_LMAT);
tmp &= ~TSI148_LCSR_LMAT_EN;
iowrite32be(tmp, bridge->base + TSI148_LCSR_LMAT);
}
mutex_unlock(&lm->mtx);
return 0;
}
/*
* Determine Geographical Addressing
*/
static int tsi148_slot_get(struct vme_bridge *tsi148_bridge)
{
u32 slot = 0;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
if (!geoid) {
slot = ioread32be(bridge->base + TSI148_LCSR_VSTAT);
slot = slot & TSI148_LCSR_VSTAT_GA_M;
} else
slot = geoid;
return (int)slot;
}
static void *tsi148_alloc_consistent(struct device *parent, size_t size,
dma_addr_t *dma)
{
struct pci_dev *pdev;
/* Find pci_dev container of dev */
pdev = to_pci_dev(parent);
return pci_alloc_consistent(pdev, size, dma);
}
static void tsi148_free_consistent(struct device *parent, size_t size,
void *vaddr, dma_addr_t dma)
{
struct pci_dev *pdev;
/* Find pci_dev container of dev */
pdev = to_pci_dev(parent);
pci_free_consistent(pdev, size, vaddr, dma);
}
/*
* Configure CR/CSR space
*
* Access to the CR/CSR can be configured at power-up. The location of the
* CR/CSR registers in the CR/CSR address space is determined by the boards
* Auto-ID or Geographic address. This function ensures that the window is
* enabled at an offset consistent with the boards geopgraphic address.
*
* Each board has a 512kB window, with the highest 4kB being used for the
* boards registers, this means there is a fix length 508kB window which must
* be mapped onto PCI memory.
*/
static int tsi148_crcsr_init(struct vme_bridge *tsi148_bridge,
struct pci_dev *pdev)
{
u32 cbar, crat, vstat;
u32 crcsr_bus_high, crcsr_bus_low;
int retval;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
/* Allocate mem for CR/CSR image */
bridge->crcsr_kernel = pci_zalloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
&bridge->crcsr_bus);
if (!bridge->crcsr_kernel) {
dev_err(tsi148_bridge->parent, "Failed to allocate memory for "
"CR/CSR image\n");
return -ENOMEM;
}
reg_split(bridge->crcsr_bus, &crcsr_bus_high, &crcsr_bus_low);
iowrite32be(crcsr_bus_high, bridge->base + TSI148_LCSR_CROU);
iowrite32be(crcsr_bus_low, bridge->base + TSI148_LCSR_CROL);
/* Ensure that the CR/CSR is configured at the correct offset */
cbar = ioread32be(bridge->base + TSI148_CBAR);
cbar = (cbar & TSI148_CRCSR_CBAR_M)>>3;
vstat = tsi148_slot_get(tsi148_bridge);
if (cbar != vstat) {
cbar = vstat;
dev_info(tsi148_bridge->parent, "Setting CR/CSR offset\n");
iowrite32be(cbar<<3, bridge->base + TSI148_CBAR);
}
dev_info(tsi148_bridge->parent, "CR/CSR Offset: %d\n", cbar);
crat = ioread32be(bridge->base + TSI148_LCSR_CRAT);
if (crat & TSI148_LCSR_CRAT_EN)
dev_info(tsi148_bridge->parent, "CR/CSR already enabled\n");
else {
dev_info(tsi148_bridge->parent, "Enabling CR/CSR space\n");
iowrite32be(crat | TSI148_LCSR_CRAT_EN,
bridge->base + TSI148_LCSR_CRAT);
}
/* If we want flushed, error-checked writes, set up a window
* over the CR/CSR registers. We read from here to safely flush
* through VME writes.
*/
if (err_chk) {
retval = tsi148_master_set(bridge->flush_image, 1,
(vstat * 0x80000), 0x80000, VME_CRCSR, VME_SCT,
VME_D16);
if (retval)
dev_err(tsi148_bridge->parent, "Configuring flush image"
" failed\n");
}
return 0;
}
static void tsi148_crcsr_exit(struct vme_bridge *tsi148_bridge,
struct pci_dev *pdev)
{
u32 crat;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
/* Turn off CR/CSR space */
crat = ioread32be(bridge->base + TSI148_LCSR_CRAT);
iowrite32be(crat & ~TSI148_LCSR_CRAT_EN,
bridge->base + TSI148_LCSR_CRAT);
/* Free image */
iowrite32be(0, bridge->base + TSI148_LCSR_CROU);
iowrite32be(0, bridge->base + TSI148_LCSR_CROL);
pci_free_consistent(pdev, VME_CRCSR_BUF_SIZE, bridge->crcsr_kernel,
bridge->crcsr_bus);
}
static int tsi148_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
int retval, i, master_num;
u32 data;
struct list_head *pos = NULL, *n;
struct vme_bridge *tsi148_bridge;
struct tsi148_driver *tsi148_device;
struct vme_master_resource *master_image;
struct vme_slave_resource *slave_image;
struct vme_dma_resource *dma_ctrlr;
struct vme_lm_resource *lm;
/* If we want to support more than one of each bridge, we need to
* dynamically generate this so we get one per device
*/
tsi148_bridge = kzalloc(sizeof(*tsi148_bridge), GFP_KERNEL);
if (!tsi148_bridge) {
retval = -ENOMEM;
goto err_struct;
}
vme_init_bridge(tsi148_bridge);
tsi148_device = kzalloc(sizeof(*tsi148_device), GFP_KERNEL);
if (!tsi148_device) {
retval = -ENOMEM;
goto err_driver;
}
tsi148_bridge->driver_priv = tsi148_device;
/* Enable the device */
retval = pci_enable_device(pdev);
if (retval) {
dev_err(&pdev->dev, "Unable to enable device\n");
goto err_enable;
}
/* Map Registers */
retval = pci_request_regions(pdev, driver_name);
if (retval) {
dev_err(&pdev->dev, "Unable to reserve resources\n");
goto err_resource;
}
/* map registers in BAR 0 */
tsi148_device->base = ioremap_nocache(pci_resource_start(pdev, 0),
4096);
if (!tsi148_device->base) {
dev_err(&pdev->dev, "Unable to remap CRG region\n");
retval = -EIO;
goto err_remap;
}
/* Check to see if the mapping worked out */
data = ioread32(tsi148_device->base + TSI148_PCFS_ID) & 0x0000FFFF;
if (data != PCI_VENDOR_ID_TUNDRA) {
dev_err(&pdev->dev, "CRG region check failed\n");
retval = -EIO;
goto err_test;
}
/* Initialize wait queues & mutual exclusion flags */
init_waitqueue_head(&tsi148_device->dma_queue[0]);
init_waitqueue_head(&tsi148_device->dma_queue[1]);
init_waitqueue_head(&tsi148_device->iack_queue);
mutex_init(&tsi148_device->vme_int);
mutex_init(&tsi148_device->vme_rmw);
tsi148_bridge->parent = &pdev->dev;
strcpy(tsi148_bridge->name, driver_name);
/* Setup IRQ */
retval = tsi148_irq_init(tsi148_bridge);
if (retval != 0) {
dev_err(&pdev->dev, "Chip Initialization failed.\n");
goto err_irq;
}
/* If we are going to flush writes, we need to read from the VME bus.
* We need to do this safely, thus we read the devices own CR/CSR
* register. To do this we must set up a window in CR/CSR space and
* hence have one less master window resource available.
*/
master_num = TSI148_MAX_MASTER;
if (err_chk) {
master_num--;
tsi148_device->flush_image =
kmalloc(sizeof(*tsi148_device->flush_image),
GFP_KERNEL);
if (!tsi148_device->flush_image) {
retval = -ENOMEM;
goto err_master;
}
tsi148_device->flush_image->parent = tsi148_bridge;
spin_lock_init(&tsi148_device->flush_image->lock);
tsi148_device->flush_image->locked = 1;
tsi148_device->flush_image->number = master_num;
memset(&tsi148_device->flush_image->bus_resource, 0,
sizeof(tsi148_device->flush_image->bus_resource));
tsi148_device->flush_image->kern_base = NULL;
}
/* Add master windows to list */
for (i = 0; i < master_num; i++) {
master_image = kmalloc(sizeof(*master_image), GFP_KERNEL);
if (!master_image) {
retval = -ENOMEM;
goto err_master;
}
master_image->parent = tsi148_bridge;
spin_lock_init(&master_image->lock);
master_image->locked = 0;
master_image->number = i;
master_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
VME_A64 | VME_CRCSR | VME_USER1 | VME_USER2 |
VME_USER3 | VME_USER4;
master_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
VME_2eVME | VME_2eSST | VME_2eSSTB | VME_2eSST160 |
VME_2eSST267 | VME_2eSST320 | VME_SUPER | VME_USER |
VME_PROG | VME_DATA;
master_image->width_attr = VME_D16 | VME_D32;
memset(&master_image->bus_resource, 0,
sizeof(master_image->bus_resource));
master_image->kern_base = NULL;
list_add_tail(&master_image->list,
&tsi148_bridge->master_resources);
}
/* Add slave windows to list */
for (i = 0; i < TSI148_MAX_SLAVE; i++) {
slave_image = kmalloc(sizeof(*slave_image), GFP_KERNEL);
if (!slave_image) {
retval = -ENOMEM;
goto err_slave;
}
slave_image->parent = tsi148_bridge;
mutex_init(&slave_image->mtx);
slave_image->locked = 0;
slave_image->number = i;
slave_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
VME_A64;
slave_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
VME_2eVME | VME_2eSST | VME_2eSSTB | VME_2eSST160 |
VME_2eSST267 | VME_2eSST320 | VME_SUPER | VME_USER |
VME_PROG | VME_DATA;
list_add_tail(&slave_image->list,
&tsi148_bridge->slave_resources);
}
/* Add dma engines to list */
for (i = 0; i < TSI148_MAX_DMA; i++) {
dma_ctrlr = kmalloc(sizeof(*dma_ctrlr), GFP_KERNEL);
if (!dma_ctrlr) {
retval = -ENOMEM;
goto err_dma;
}
dma_ctrlr->parent = tsi148_bridge;
mutex_init(&dma_ctrlr->mtx);
dma_ctrlr->locked = 0;
dma_ctrlr->number = i;
dma_ctrlr->route_attr = VME_DMA_VME_TO_MEM |
VME_DMA_MEM_TO_VME | VME_DMA_VME_TO_VME |
VME_DMA_MEM_TO_MEM | VME_DMA_PATTERN_TO_VME |
VME_DMA_PATTERN_TO_MEM;
INIT_LIST_HEAD(&dma_ctrlr->pending);
INIT_LIST_HEAD(&dma_ctrlr->running);
list_add_tail(&dma_ctrlr->list,
&tsi148_bridge->dma_resources);
}
/* Add location monitor to list */
lm = kmalloc(sizeof(*lm), GFP_KERNEL);
if (!lm) {
retval = -ENOMEM;
goto err_lm;
}
lm->parent = tsi148_bridge;
mutex_init(&lm->mtx);
lm->locked = 0;
lm->number = 1;
lm->monitors = 4;
list_add_tail(&lm->list, &tsi148_bridge->lm_resources);
tsi148_bridge->slave_get = tsi148_slave_get;
tsi148_bridge->slave_set = tsi148_slave_set;
tsi148_bridge->master_get = tsi148_master_get;
tsi148_bridge->master_set = tsi148_master_set;
tsi148_bridge->master_read = tsi148_master_read;
tsi148_bridge->master_write = tsi148_master_write;
tsi148_bridge->master_rmw = tsi148_master_rmw;
tsi148_bridge->dma_list_add = tsi148_dma_list_add;
tsi148_bridge->dma_list_exec = tsi148_dma_list_exec;
tsi148_bridge->dma_list_empty = tsi148_dma_list_empty;
tsi148_bridge->irq_set = tsi148_irq_set;
tsi148_bridge->irq_generate = tsi148_irq_generate;
tsi148_bridge->lm_set = tsi148_lm_set;
tsi148_bridge->lm_get = tsi148_lm_get;
tsi148_bridge->lm_attach = tsi148_lm_attach;
tsi148_bridge->lm_detach = tsi148_lm_detach;
tsi148_bridge->slot_get = tsi148_slot_get;
tsi148_bridge->alloc_consistent = tsi148_alloc_consistent;
tsi148_bridge->free_consistent = tsi148_free_consistent;
data = ioread32be(tsi148_device->base + TSI148_LCSR_VSTAT);
dev_info(&pdev->dev, "Board is%s the VME system controller\n",
(data & TSI148_LCSR_VSTAT_SCONS) ? "" : " not");
if (!geoid)
dev_info(&pdev->dev, "VME geographical address is %d\n",
data & TSI148_LCSR_VSTAT_GA_M);
else
dev_info(&pdev->dev, "VME geographical address is set to %d\n",
geoid);
dev_info(&pdev->dev, "VME Write and flush and error check is %s\n",
err_chk ? "enabled" : "disabled");
retval = tsi148_crcsr_init(tsi148_bridge, pdev);
if (retval) {
dev_err(&pdev->dev, "CR/CSR configuration failed.\n");
goto err_crcsr;
}
retval = vme_register_bridge(tsi148_bridge);
if (retval != 0) {
dev_err(&pdev->dev, "Chip Registration failed.\n");
goto err_reg;
}
pci_set_drvdata(pdev, tsi148_bridge);
/* Clear VME bus "board fail", and "power-up reset" lines */
data = ioread32be(tsi148_device->base + TSI148_LCSR_VSTAT);
data &= ~TSI148_LCSR_VSTAT_BRDFL;
data |= TSI148_LCSR_VSTAT_CPURST;
iowrite32be(data, tsi148_device->base + TSI148_LCSR_VSTAT);
return 0;
err_reg:
tsi148_crcsr_exit(tsi148_bridge, pdev);
err_crcsr:
err_lm:
/* resources are stored in link list */
list_for_each_safe(pos, n, &tsi148_bridge->lm_resources) {
lm = list_entry(pos, struct vme_lm_resource, list);
list_del(pos);
kfree(lm);
}
err_dma:
/* resources are stored in link list */
list_for_each_safe(pos, n, &tsi148_bridge->dma_resources) {
dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
list_del(pos);
kfree(dma_ctrlr);
}
err_slave:
/* resources are stored in link list */
list_for_each_safe(pos, n, &tsi148_bridge->slave_resources) {
slave_image = list_entry(pos, struct vme_slave_resource, list);
list_del(pos);
kfree(slave_image);
}
err_master:
/* resources are stored in link list */
list_for_each_safe(pos, n, &tsi148_bridge->master_resources) {
master_image = list_entry(pos, struct vme_master_resource,
list);
list_del(pos);
kfree(master_image);
}
tsi148_irq_exit(tsi148_bridge, pdev);
err_irq:
err_test:
iounmap(tsi148_device->base);
err_remap:
pci_release_regions(pdev);
err_resource:
pci_disable_device(pdev);
err_enable:
kfree(tsi148_device);
err_driver:
kfree(tsi148_bridge);
err_struct:
return retval;
}
static void tsi148_remove(struct pci_dev *pdev)
{
struct list_head *pos = NULL;
struct list_head *tmplist;
struct vme_master_resource *master_image;
struct vme_slave_resource *slave_image;
struct vme_dma_resource *dma_ctrlr;
int i;
struct tsi148_driver *bridge;
struct vme_bridge *tsi148_bridge = pci_get_drvdata(pdev);
bridge = tsi148_bridge->driver_priv;
dev_dbg(&pdev->dev, "Driver is being unloaded.\n");
/*
* Shutdown all inbound and outbound windows.
*/
for (i = 0; i < 8; i++) {
iowrite32be(0, bridge->base + TSI148_LCSR_IT[i] +
TSI148_LCSR_OFFSET_ITAT);
iowrite32be(0, bridge->base + TSI148_LCSR_OT[i] +
TSI148_LCSR_OFFSET_OTAT);
}
/*
* Shutdown Location monitor.
*/
iowrite32be(0, bridge->base + TSI148_LCSR_LMAT);
/*
* Shutdown CRG map.
*/
iowrite32be(0, bridge->base + TSI148_LCSR_CSRAT);
/*
* Clear error status.
*/
iowrite32be(0xFFFFFFFF, bridge->base + TSI148_LCSR_EDPAT);
iowrite32be(0xFFFFFFFF, bridge->base + TSI148_LCSR_VEAT);
iowrite32be(0x07000700, bridge->base + TSI148_LCSR_PSTAT);
/*
* Remove VIRQ interrupt (if any)
*/
if (ioread32be(bridge->base + TSI148_LCSR_VICR) & 0x800)
iowrite32be(0x8000, bridge->base + TSI148_LCSR_VICR);
/*
* Map all Interrupts to PCI INTA
*/
iowrite32be(0x0, bridge->base + TSI148_LCSR_INTM1);
iowrite32be(0x0, bridge->base + TSI148_LCSR_INTM2);
tsi148_irq_exit(tsi148_bridge, pdev);
vme_unregister_bridge(tsi148_bridge);
tsi148_crcsr_exit(tsi148_bridge, pdev);
/* resources are stored in link list */
list_for_each_safe(pos, tmplist, &tsi148_bridge->dma_resources) {
dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
list_del(pos);
kfree(dma_ctrlr);
}
/* resources are stored in link list */
list_for_each_safe(pos, tmplist, &tsi148_bridge->slave_resources) {
slave_image = list_entry(pos, struct vme_slave_resource, list);
list_del(pos);
kfree(slave_image);
}
/* resources are stored in link list */
list_for_each_safe(pos, tmplist, &tsi148_bridge->master_resources) {
master_image = list_entry(pos, struct vme_master_resource,
list);
list_del(pos);
kfree(master_image);
}
iounmap(bridge->base);
pci_release_regions(pdev);
pci_disable_device(pdev);
kfree(tsi148_bridge->driver_priv);
kfree(tsi148_bridge);
}
module_pci_driver(tsi148_driver);
MODULE_PARM_DESC(err_chk, "Check for VME errors on reads and writes");
module_param(err_chk, bool, 0);
MODULE_PARM_DESC(geoid, "Override geographical addressing");
module_param(geoid, int, 0);
MODULE_DESCRIPTION("VME driver for the Tundra Tempe VME bridge");
MODULE_LICENSE("GPL");
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