/* GR-TMTC-1553 PCI Target driver.
*
* COPYRIGHT (c) 2008.
* Cobham Gaisler AB.
*
* Configures the GR-TMTC-1553 interface PCI board.
* This driver provides a AMBA PnP bus by using the general part
* of the AMBA PnP bus driver (ambapp_bus.c).
*
* Driver resources for the AMBA PnP bus provided can be set using
* gr_tmtc_1553_set_resources().
*
* The license and distribution terms for this file may be
* found in found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <bsp.h>
#include <rtems/bspIo.h>
#include <pci.h>
#include <pci/access.h>
#include <grlib/ambapp.h>
#include <grlib/grlib.h>
#include <drvmgr/drvmgr.h>
#include <grlib/ambapp_bus.h>
#include <drvmgr/pci_bus.h>
#include <grlib/bspcommon.h>
#include <grlib/genirq.h>
#include <grlib/gr_tmtc_1553.h>
#include <grlib/grlib_impl.h>
/*#define DEBUG 1 */
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
/* PCI ID */
#define PCIID_VENDOR_GAISLER 0x1AC8
int gr_tmtc_1553_init1(struct drvmgr_dev *dev);
int gr_tmtc_1553_init2(struct drvmgr_dev *dev);
void gr_tmtc_1553_isr (void *arg);
struct gr_tmtc_1553_ver {
const unsigned int amba_freq_hz; /* The frequency */
const unsigned int amba_ioarea; /* The address where the PnP IOAREA starts at */
};
/* Private data structure for driver */
struct gr_tmtc_1553_priv {
/* Driver management */
struct drvmgr_dev *dev;
char prefix[32];
SPIN_DECLARE(devlock);
/* PCI */
pci_dev_t pcidev;
struct pci_dev_info *devinfo;
/* IRQ */
genirq_t genirq;
struct gr_tmtc_1553_ver *version;
struct irqmp_regs *irq;
struct drvmgr_map_entry bus_maps_down[2];
struct ambapp_bus abus;
struct ambapp_mmap amba_maps[4];
struct ambapp_config config;
};
struct gr_tmtc_1553_ver gr_tmtc_1553_ver0 = {
.amba_freq_hz = 33333333,
.amba_ioarea = 0xfff00000,
};
int ambapp_tmtc_1553_int_register(
struct drvmgr_dev *dev,
int irq,
const char *info,
drvmgr_isr handler,
void *arg);
int ambapp_tmtc_1553_int_unregister(
struct drvmgr_dev *dev,
int irq,
drvmgr_isr handler,
void *arg);
int ambapp_tmtc_1553_int_unmask(
struct drvmgr_dev *dev,
int irq);
int ambapp_tmtc_1553_int_mask(
struct drvmgr_dev *dev,
int irq);
int ambapp_tmtc_1553_int_clear(
struct drvmgr_dev *dev,
int irq);
int ambapp_tmtc_1553_get_params(
struct drvmgr_dev *dev,
struct drvmgr_bus_params *params);
struct ambapp_ops ambapp_tmtc_1553_ops = {
.int_register = ambapp_tmtc_1553_int_register,
.int_unregister = ambapp_tmtc_1553_int_unregister,
.int_unmask = ambapp_tmtc_1553_int_unmask,
.int_mask = ambapp_tmtc_1553_int_mask,
.int_clear = ambapp_tmtc_1553_int_clear,
.get_params = ambapp_tmtc_1553_get_params
};
struct drvmgr_drv_ops gr_tmtc_1553_ops =
{
{gr_tmtc_1553_init1, gr_tmtc_1553_init2, NULL, NULL},
NULL,
NULL
};
struct pci_dev_id_match gr_tmtc_1553_ids[] =
{
PCIID_DEVVEND(PCIID_VENDOR_GAISLER, PCIID_DEVICE_GR_TMTC_1553),
PCIID_END_TABLE /* Mark end of table */
};
struct pci_drv_info gr_tmtc_1553_info =
{
{
DRVMGR_OBJ_DRV, /* Driver */
NULL, /* Next driver */
NULL, /* Device list */
DRIVER_PCI_GAISLER_TMTC_1553_ID, /* Driver ID */
"GR-TMTC-1553_DRV", /* Driver Name */
DRVMGR_BUS_TYPE_PCI, /* Bus Type */
&gr_tmtc_1553_ops,
NULL, /* Funcs */
0, /* No devices yet */
0,
},
&gr_tmtc_1553_ids[0]
};
/* Driver resources configuration for the AMBA bus on the GR-RASTA-IO board.
* It is declared weak so that the user may override it from the project file,
* if the default settings are not enough.
*
* The configuration consists of an array of configuration pointers, each
* pointer determine the configuration of one GR-RASTA-IO board. Pointer
* zero is for board0, pointer 1 for board1 and so on.
*
* The array must end with a NULL pointer.
*/
struct drvmgr_bus_res *gr_tmtc_1553_resources[] __attribute__((weak)) =
{
NULL
};
void gr_tmtc_1553_register_drv(void)
{
DBG("Registering GR-TMTC-1553 PCI driver\n");
drvmgr_drv_register(&gr_tmtc_1553_info.general);
}
void gr_tmtc_1553_isr (void *arg)
{
struct gr_tmtc_1553_priv *priv = arg;
unsigned int status, tmp;
int irq;
SPIN_ISR_IRQFLAGS(irqflags);
tmp = status = priv->irq->ipend;
/* DBG("GR-RASTA-IO: IRQ 0x%x\n",status); */
SPIN_LOCK(&priv->devlock, irqflags);
for(irq=0; irq<16; irq++) {
if ( status & (1<<irq) ) {
genirq_doirq(priv->genirq, irq);
priv->irq->iclear = (1<<irq);
status &= ~(1<<irq);
if ( status == 0 )
break;
}
}
SPIN_UNLOCK(&priv->devlock, irqflags);
/* ACK interrupt, this is because PCI is Level, so the IRQ Controller still drives the IRQ. */
if ( tmp )
drvmgr_interrupt_clear(priv->dev, 0);
DBG("GR-TMTC-1553-IRQ: 0x%x\n", tmp);
}
static int gr_tmtc_1553_hw_init(struct gr_tmtc_1553_priv *priv)
{
unsigned int *page0 = NULL;
struct ambapp_dev *tmp;
unsigned int pci_freq_hz;
struct pci_dev_info *devinfo = priv->devinfo;
uint32_t bar0, bar0_size;
/* Select version of GR-TMTC-1553 board */
switch (devinfo->rev) {
case 0:
priv->version = &gr_tmtc_1553_ver0;
break;
default:
return -2;
}
bar0 = devinfo->resources[0].address;
bar0_size = devinfo->resources[0].size;
page0 = (unsigned int *)(bar0 + bar0_size/2);
/* Point PAGE0 to start of board address map. RAM at 0xff000000, APB at 0xffc00000, IOAREA at 0xfff000000 */
/* XXX We assume little endian host with byte twisting enabled here */
*page0 = 0x010000ff; /* Set little endian mode on peripheral. */
/* Scan AMBA Plug&Play */
/* AMBA MAP bar0 (in CPU) ==> 0x80000000(remote amba address) */
priv->amba_maps[0].size = 0x1000000;
priv->amba_maps[0].local_adr = bar0;
priv->amba_maps[0].remote_adr = 0xff000000;
/* Addresses not matching with map be untouched */
priv->amba_maps[2].size = 0xfffffff0;
priv->amba_maps[2].local_adr = 0;
priv->amba_maps[2].remote_adr = 0;
/* Mark end of table */
priv->amba_maps[3].size=0;
priv->amba_maps[3].local_adr = 0;
priv->amba_maps[3].remote_adr = 0;
/* Start AMBA PnP scan at first AHB bus */
ambapp_scan(&priv->abus,
bar0 + (priv->version->amba_ioarea & ~0xff000000),
NULL, &priv->amba_maps[0]);
/* Frequency is the hsame as the PCI bus frequency */
drvmgr_freq_get(priv->dev, 0, &pci_freq_hz);
ambapp_freq_init(&priv->abus, NULL, pci_freq_hz);
/* Find IRQ controller */
tmp = (struct ambapp_dev *)ambapp_for_each(&priv->abus,
(OPTIONS_ALL|OPTIONS_APB_SLVS),
VENDOR_GAISLER, GAISLER_IRQMP,
ambapp_find_by_idx, NULL);
if ( !tmp ) {
return -4;
}
priv->irq = (struct irqmp_regs *)DEV_TO_APB(tmp)->start;
/* Set up irq controller */
priv->irq->mask[0] = 0;
priv->irq->iclear = 0xffff;
priv->irq->ilevel = 0;
/* DOWN streams translation table */
priv->bus_maps_down[0].name = "PCI BAR0 -> AMBA";
priv->bus_maps_down[0].size = priv->amba_maps[0].size;
priv->bus_maps_down[0].from_adr = (void *)priv->amba_maps[0].local_adr;
priv->bus_maps_down[0].to_adr = (void *)priv->amba_maps[0].remote_adr;
/* Mark end of translation table */
priv->bus_maps_down[1].size = 0;
/* Successfully registered the board */
return 0;
}
/* Called when a PCI target is found with the PCI device and vendor ID
* given in gr_tmtc_1553_ids[].
*/
int gr_tmtc_1553_init1(struct drvmgr_dev *dev)
{
struct gr_tmtc_1553_priv *priv;
struct pci_dev_info *devinfo;
int status;
uint32_t bar0, bar0_size;
int resources_cnt;
/* PCI device does not have the IRQ line register, when PCI autoconf configures it the configuration
* is forgotten. We take the IRQ number from the PCI Host device (AMBA device), this works as long
* as PCI-IRQs are ored together on the bus.
*
* Note that this only works on LEON.
*/
((struct pci_dev_info *)dev->businfo)->irq = ((struct amba_dev_info *)dev->parent->dev->businfo)->info.irq;
priv = grlib_calloc(1, sizeof(*priv));
if ( !priv )
return DRVMGR_NOMEM;
dev->priv = priv;
priv->dev = dev;
/* Determine number of configurations */
resources_cnt = get_resarray_count(gr_tmtc_1553_resources);
/* Generate Device prefix */
strcpy(priv->prefix, "/dev/tmtc1553_0");
priv->prefix[14] += dev->minor_drv;
mkdir(priv->prefix, S_IRWXU | S_IRWXG | S_IRWXO);
priv->prefix[15] = '/';
priv->prefix[16] = '\0';
priv->devinfo = devinfo = (struct pci_dev_info *)dev->businfo;
priv->pcidev = devinfo->pcidev;
bar0 = devinfo->resources[0].address;
bar0_size = devinfo->resources[0].size;
printk("\n\n--- GR-TMTC-1553[%d] ---\n", dev->minor_drv);
printk(" PCI BUS: 0x%x, SLOT: 0x%x, FUNCTION: 0x%x\n",
PCI_DEV_EXPAND(priv->pcidev));
printk(" PCI VENDOR: 0x%04x, DEVICE: 0x%04x\n",
devinfo->id.vendor, devinfo->id.device);
printk(" PCI BAR[0]: 0x%" PRIx32 " - 0x%" PRIx32 "\n",
bar0, bar0 + bar0_size - 1);
printk(" IRQ: %d\n\n\n", devinfo->irq);
/* all neccessary space assigned to GR-TMTC-1553 target? */
if (bar0_size == 0)
return DRVMGR_ENORES;
/* Initialize spin-lock for this PCI peripheral device. This is to
* protect the Interrupt Controller Registers. The genirq layer is
* protecting its own internals and ISR dispatching.
*/
SPIN_INIT(&priv->devlock, priv->prefix);
priv->genirq = genirq_init(16);
if ( priv->genirq == NULL ) {
free(priv);
dev->priv = NULL;
return DRVMGR_FAIL;
}
status = gr_tmtc_1553_hw_init(priv);
if ( status != 0 ) {
genirq_destroy(priv->genirq);
free(priv);
dev->priv = NULL;
printk(" Failed to initialize GR-TMTC-1553 HW: %d\n", status);
return DRVMGR_FAIL;
}
/* Init amba bus */
priv->config.abus = &priv->abus;
priv->config.ops = &ambapp_tmtc_1553_ops;
priv->config.maps_down = &priv->bus_maps_down[0];
/* This PCI device has only target interface so DMA is not supported,
* which means that translation from AMBA->PCI should fail if attempted.
*/
priv->config.maps_up = DRVMGR_TRANSLATE_NO_BRIDGE;
if ( priv->dev->minor_drv < resources_cnt ) {
priv->config.resources = gr_tmtc_1553_resources[priv->dev->minor_drv];
} else {
priv->config.resources = NULL;
}
/* Create And Register AMBA PnP Bus */
return ambapp_bus_register(dev, &priv->config);
}
int gr_tmtc_1553_init2(struct drvmgr_dev *dev)
{
struct gr_tmtc_1553_priv *priv = dev->priv;
/* Clear any old interrupt requests */
drvmgr_interrupt_clear(dev, 0);
/* Enable System IRQ so that GR-TMTC-1553 PCI target interrupt goes through.
*
* It is important to enable it in stage init2. If interrupts were enabled in init1
* this might hang the system when more than one PCI target is connected, this is
* because PCI interrupts might be shared and PCI target 2 have not initialized and
* might therefore drive interrupt already when entering init1().
*/
drvmgr_interrupt_register(
dev,
0,
"gr_tmtc_1553",
gr_tmtc_1553_isr,
(void *)priv);
return DRVMGR_OK;
}
int ambapp_tmtc_1553_int_register(
struct drvmgr_dev *dev,
int irq,
const char *info,
drvmgr_isr handler,
void *arg)
{
struct gr_tmtc_1553_priv *priv = dev->parent->dev->priv;
SPIN_IRQFLAGS(irqflags);
int status;
void *h;
h = genirq_alloc_handler(handler, arg);
if ( h == NULL )
return DRVMGR_FAIL;
SPIN_LOCK_IRQ(&priv->devlock, irqflags);
status = genirq_register(priv->genirq, irq, h);
if ( status == 0 ) {
/* Disable and clear IRQ for first registered handler */
priv->irq->iclear = (1<<irq);
priv->irq->mask[0] &= ~(1<<irq); /* mask interrupt source */
} else if ( status == 1 )
status = 0;
if (status != 0) {
SPIN_UNLOCK_IRQ(&priv->devlock, irqflags);
genirq_free_handler(h);
return DRVMGR_FAIL;
}
status = genirq_enable(priv->genirq, irq, handler, arg);
if ( status == 0 ) {
/* Enable IRQ for first enabled handler only */
priv->irq->mask[0] |= (1<<irq); /* unmask interrupt source */
} else if ( status == 1 )
status = 0;
SPIN_UNLOCK_IRQ(&priv->devlock, irqflags);
return status;
}
int ambapp_tmtc_1553_int_unregister(
struct drvmgr_dev *dev,
int irq,
drvmgr_isr isr,
void *arg)
{
struct gr_tmtc_1553_priv *priv = dev->parent->dev->priv;
SPIN_IRQFLAGS(irqflags);
int status;
void *handler;
SPIN_LOCK_IRQ(&priv->devlock, irqflags);
status = genirq_disable(priv->genirq, irq, isr, arg);
if ( status == 0 ) {
/* Disable IRQ only when no enabled handler exists */
priv->irq->mask[0] &= ~(1<<irq); /* mask interrupt source */
} else if ( status == 1 )
status = 0;
handler = genirq_unregister(priv->genirq, irq, isr, arg);
if ( handler == NULL )
status = DRVMGR_FAIL;
else
status = DRVMGR_OK;
SPIN_UNLOCK_IRQ(&priv->devlock, irqflags);
if (handler)
genirq_free_handler(handler);
return status;
}
int ambapp_tmtc_1553_int_unmask(
struct drvmgr_dev *dev,
int irq)
{
struct gr_tmtc_1553_priv *priv = dev->parent->dev->priv;
SPIN_IRQFLAGS(irqflags);
DBG("TMTC-1553 IRQ %d: enable\n", irq);
if ( genirq_check(priv->genirq, irq) )
return DRVMGR_FAIL;
SPIN_LOCK_IRQ(&priv->devlock, irqflags);
/* Enable IRQ */
priv->irq->mask[0] |= (1<<irq); /* unmask interrupt source */
SPIN_UNLOCK_IRQ(&priv->devlock, irqflags);
return DRVMGR_OK;
}
int ambapp_tmtc_1553_int_mask(
struct drvmgr_dev *dev,
int irq)
{
struct gr_tmtc_1553_priv *priv = dev->parent->dev->priv;
SPIN_IRQFLAGS(irqflags);
DBG("TMTC-1553 IRQ %d: disable\n", irq);
if ( genirq_check(priv->genirq, irq) )
return DRVMGR_FAIL;
SPIN_LOCK_IRQ(&priv->devlock, irqflags);
/* Disable IRQ */
priv->irq->mask[0] &= ~(1<<irq); /* mask interrupt source */
SPIN_UNLOCK_IRQ(&priv->devlock, irqflags);
return DRVMGR_OK;
}
int ambapp_tmtc_1553_int_clear(
struct drvmgr_dev *dev,
int irq)
{
struct gr_tmtc_1553_priv *priv = dev->parent->dev->priv;
if ( genirq_check(priv->genirq, irq) )
return DRVMGR_FAIL;
priv->irq->iclear = (1<<irq);
return DRVMGR_OK;
}
int ambapp_tmtc_1553_get_params(struct drvmgr_dev *dev, struct drvmgr_bus_params *params)
{
struct gr_tmtc_1553_priv *priv = dev->parent->dev->priv;
/* Device name prefix pointer, skip /dev */
params->dev_prefix = &priv->prefix[5];
return 0;
}
void gr_tmtc_1553_print_dev(struct drvmgr_dev *dev, int options)
{
struct gr_tmtc_1553_priv *priv = dev->priv;
struct pci_dev_info *devinfo = priv->devinfo;
uint32_t bar0, bar0_size;
/* Print */
printf("--- GR-TMTC-1553 [bus 0x%x, dev 0x%x, fun 0x%x] ---\n",
PCI_DEV_EXPAND(priv->pcidev));
bar0 = devinfo->resources[0].address;
bar0_size = devinfo->resources[0].size;
printf(" PCI BAR[0]: 0x%" PRIx32 " - 0x%" PRIx32 "\n",
bar0, bar0 + bar0_size - 1);
printf(" IRQ REGS: 0x%" PRIxPTR "\n", (uintptr_t)priv->irq);
printf(" IRQ: %d\n", devinfo->irq);
printf(" FREQ: %d Hz\n", priv->version->amba_freq_hz);
printf(" IMASK: 0x%08x\n", priv->irq->mask[0]);
printf(" IPEND: 0x%08x\n", priv->irq->ipend);
/* Print amba config */
if ( options & TMTC_1553_OPTIONS_AMBA ) {
ambapp_print(&priv->abus, 10);
}
#if 0
/* Print IRQ handlers and their arguments */
if ( options & TMTC_1553_OPTIONS_IRQ ) {
int i;
for(i=0; i<16; i++) {
printf(" IRQ[%02d]: 0x%x, arg: 0x%x\n",
i, (unsigned int)priv->isrs[i].handler, (unsigned int)priv->isrs[i].arg);
}
}
#endif
}
void gr_tmtc_1553_print(int options)
{
struct pci_drv_info *drv = &gr_tmtc_1553_info;
struct drvmgr_dev *dev;
dev = drv->general.dev;
while(dev) {
gr_tmtc_1553_print_dev(dev, options);
dev = dev->next_in_drv;
}
}
