/* GR-701 PCI Target driver.
*
* COPYRIGHT (c) 2008.
* Cobham Gaisler AB.
*
* Configures the GR-701 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
* gr701_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.com/license/LICENSE.
*/
#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 <ambapp.h>
#include <ambapp.h>
#include <drvmgr/drvmgr.h>
#include <drvmgr/ambapp_bus.h>
#include <drvmgr/pci_bus.h>
#include <drvmgr/bspcommon.h>
#include <genirq.h>
#include <gr_701.h>
/* Offset from 0x80000000 (dual bus version) */
#define AHB1_BASE_ADDR 0x80000000
#define AHB1_IOAREA_BASE_ADDR 0x80100000
/* #define DEBUG 1 */
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
int gr701_init1(struct drvmgr_dev *dev);
int gr701_init2(struct drvmgr_dev *dev);
void gr701_interrupt(void *arg);
#define READ_REG(address) (*(volatile unsigned int *)address)
/* PCI bride reg layout on AMBA side */
struct amba_bridge_regs {
volatile unsigned int bar0;
volatile unsigned int bar1;
volatile unsigned int bar2;
volatile unsigned int bar3;
volatile unsigned int bar4;/* 0x10 */
volatile unsigned int unused[4*3-1];
volatile unsigned int ambabars[1]; /* 0x40 */
};
/* PCI bride reg layout on PCI side */
struct pci_bridge_regs {
volatile unsigned int bar0;
volatile unsigned int bar1;
volatile unsigned int bar2;
volatile unsigned int bar3;
volatile unsigned int bar4; /* 0x10 */
volatile unsigned int ilevel;
volatile unsigned int ipend;
volatile unsigned int iforce;
volatile unsigned int istatus;
volatile unsigned int iclear;
volatile unsigned int imask;
};
/* Private data structure for driver */
struct gr701_priv {
/* Driver management */
struct drvmgr_dev *dev;
char prefix[16];
struct pci_bridge_regs *pcib;
struct amba_bridge_regs *ambab;
/* PCI */
pci_dev_t pcidev;
struct pci_dev_info *devinfo;
/* IRQ */
genirq_t genirq;
int interrupt_cnt;
/* GR-701 Address translation */
struct drvmgr_map_entry bus_maps_up[2];
struct drvmgr_map_entry bus_maps_down[2];
/* AMBA Plug&Play information on GR-701 */
struct ambapp_bus abus;
struct ambapp_mmap amba_maps[3];
struct ambapp_config config;
};
int ambapp_gr701_int_register(
struct drvmgr_dev *dev,
int irq,
const char *info,
drvmgr_isr handler,
void *arg);
int ambapp_gr701_int_unregister(
struct drvmgr_dev *dev,
int irq,
drvmgr_isr isr,
void *arg);
int ambapp_gr701_int_unmask(
struct drvmgr_dev *dev,
int irq);
int ambapp_gr701_int_mask(
struct drvmgr_dev *dev,
int irq);
int ambapp_gr701_int_clear(
struct drvmgr_dev *dev,
int irq);
int ambapp_gr701_get_params(
struct drvmgr_dev *dev,
struct drvmgr_bus_params *params);
struct ambapp_ops ambapp_gr701_ops = {
.int_register = ambapp_gr701_int_register,
.int_unregister = ambapp_gr701_int_unregister,
.int_unmask = ambapp_gr701_int_unmask,
.int_mask = ambapp_gr701_int_mask,
.int_clear = ambapp_gr701_int_clear,
.get_params = ambapp_gr701_get_params
};
struct drvmgr_drv_ops gr701_ops =
{
.init = {gr701_init1, gr701_init2, NULL, NULL},
.remove = NULL,
.info = NULL
};
struct pci_dev_id_match gr701_ids[] =
{
PCIID_DEVVEND(PCIID_VENDOR_GAISLER, PCIID_DEVICE_GR_701),
PCIID_END_TABLE /* Mark end of table */
};
struct pci_drv_info gr701_info =
{
{
DRVMGR_OBJ_DRV, /* Driver */
NULL, /* Next driver */
NULL, /* Device list */
DRIVER_PCI_GAISLER_GR701_ID, /* Driver ID */
"GR-701_DRV", /* Driver Name */
DRVMGR_BUS_TYPE_PCI, /* Bus Type */
&gr701_ops,
NULL, /* Funcs */
0, /* No devices yet */
0,
},
&gr701_ids[0]
};
/* Driver resources configuration for the AMBA bus on the GR-701 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-701 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 *gr701_resources[] __attribute__((weak)) =
{
NULL
};
void gr701_register_drv(void)
{
DBG("Registering GR-701 PCI driver\n");
drvmgr_drv_register(&gr701_info.general);
}
void gr701_interrupt(void *arg)
{
struct gr701_priv *priv = arg;
unsigned int status;
int irq = 0;
while ( (status=priv->pcib->istatus) != 0 ) {
priv->interrupt_cnt++; /* An interrupt was generated */
irq = status;
genirq_doirq(priv->genirq, irq);
/* ACK interrupt */
priv->pcib->istatus = 0;
}
/* ACK interrupt, this is because PCI is Level, so the IRQ Controller still drives the IRQ. */
if ( irq )
drvmgr_interrupt_clear(priv->dev, 0);
}
static int gr701_hw_init(struct gr701_priv *priv)
{
uint32_t com1;
struct pci_bridge_regs *pcib;
struct amba_bridge_regs *ambab;
int mst;
unsigned int pci_freq_hz;
pci_dev_t pcidev = priv->pcidev;
struct pci_dev_info *devinfo = priv->devinfo;
/* Set up PCI ==> AMBA */
priv->pcib = pcib = (void *)devinfo->resources[0].address;
pcib->bar0 = 0xfc000000;
/* Set up GR701 AMBA Masters connection to PCI */
priv->ambab = ambab = (struct amba_bridge_regs *)(
devinfo->resources[1].address + 0x400);
/* Init all msters, max 16 */
for (mst=0; mst<16; mst++) {
ambab->ambabars[mst] = 0x40000000;
if (READ_REG(&ambab->ambabars[mst]) != 0x40000000)
break;
}
/* Setup Address translation for AMBA bus, assume that PCI BAR
* are mapped 1:1 to CPU.
*/
priv->amba_maps[0].size = 0x04000000;
priv->amba_maps[0].local_adr = devinfo->resources[1].address;
priv->amba_maps[0].remote_adr = 0xfc000000;
/* Mark end of table */
priv->amba_maps[1].size=0;
priv->amba_maps[1].local_adr = 0;
priv->amba_maps[1].remote_adr = 0;
/* Setup DOWN-streams address translation */
priv->bus_maps_down[0].name = "PCI BAR1 -> AMBA";
priv->bus_maps_down[0].size = priv->amba_maps[0].size;
priv->bus_maps_down[0].from_adr = (void *)devinfo->resources[1].address;
priv->bus_maps_down[0].to_adr = (void *)0xfc000000;
/* Setup UP-streams address translation */
priv->bus_maps_up[0].name = "AMBA PCIF Window";
priv->bus_maps_up[0].size = 0x10000000;
priv->bus_maps_up[0].from_adr = (void *)0xe0000000;
priv->bus_maps_up[0].to_adr = (void *)0x40000000;
/* Mark end of translation tables */
priv->bus_maps_down[1].size = 0;
priv->bus_maps_up[1].size = 0;
/* Enable I/O and Mem accesses */
pci_cfg_r32(pcidev, PCI_COMMAND, &com1);
com1 |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
pci_cfg_w32(pcidev, PCI_COMMAND, com1);
/* Start AMBA PnP scan at first AHB bus */
ambapp_scan(&priv->abus, devinfo->resources[1].address + 0x3f00000,
NULL, &priv->amba_maps[0]);
/* Frequency is the same as the PCI bus frequency */
drvmgr_freq_get(priv->dev, 0, &pci_freq_hz);
/* Initialize Frequency of AMBA bus */
ambapp_freq_init(&priv->abus, NULL, pci_freq_hz);
/* Init IRQ controller (avoid IRQ generation) */
pcib->imask = 0x0000;
pcib->ipend = 0;
pcib->iclear = 0xffff;
pcib->iforce = 0;
pcib->ilevel = 0x0;
/* Successfully registered the GR-701 board */
return 0;
}
static void gr701_hw_init2(struct gr701_priv *priv)
{
/* Enable PCI Master (for DMA) */
pci_master_enable(priv->pcidev);
}
/* Called when a PCI target is found with the PCI device and vendor ID
* given in gr701_ids[].
*/
int gr701_init1(struct drvmgr_dev *dev)
{
struct gr701_priv *priv;
struct pci_dev_info *devinfo;
uint32_t bar0, bar1, bar0_size, bar1_size;
int resources_cnt;
priv = malloc(sizeof(struct gr701_priv));
if ( !priv )
return DRVMGR_NOMEM;
memset(priv, 0, sizeof(*priv));
dev->priv = priv;
priv->dev = dev;
/* Determine number of configurations */
resources_cnt = get_resarray_count(gr701_resources);
/* Generate Device prefix */
strcpy(priv->prefix, "/dev/gr701_0");
priv->prefix[11] += dev->minor_drv;
mkdir(priv->prefix, S_IRWXU | S_IRWXG | S_IRWXO);
priv->prefix[12] = '/';
priv->prefix[13] = '\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;
bar1 = devinfo->resources[1].address;
bar1_size = devinfo->resources[1].size;
printf("\n\n--- GR-701[%d] ---\n", dev->minor_drv);
printf(" PCI BUS: 0x%x, SLOT: 0x%x, FUNCTION: 0x%x\n",
PCI_DEV_EXPAND(priv->pcidev));
printf(" PCI VENDOR: 0x%04x, DEVICE: 0x%04x\n\n\n",
devinfo->id.vendor, devinfo->id.device);
printf(" PCI BAR[0]: 0x%lx - 0x%lx\n", bar0, bar0 + bar0_size - 1);
printf(" PCI BAR[1]: 0x%lx - 0x%lx\n", bar1, bar1 + bar1_size - 1);
printf(" IRQ: %d\n\n\n", devinfo->irq);
/* all neccessary space assigned to GR-701 target? */
if ((bar0_size == 0) || (bar1_size == 0))
return DRVMGR_ENORES;
priv->genirq = genirq_init(16);
if ( priv->genirq == NULL ) {
free(priv);
dev->priv = NULL;
return DRVMGR_FAIL;
}
if ( gr701_hw_init(priv) ) {
genirq_destroy(priv->genirq);
free(priv);
dev->priv = NULL;
printf(" Failed to initialize GR-701 HW\n");
return DRVMGR_FAIL;
}
/* Init amba bus */
priv->config.abus = &priv->abus;
priv->config.ops = &ambapp_gr701_ops;
priv->config.maps_up = &priv->bus_maps_up[0];
priv->config.maps_down = &priv->bus_maps_down[0];
if ( priv->dev->minor_drv < resources_cnt ) {
priv->config.resources = gr701_resources[priv->dev->minor_drv];
} else {
priv->config.resources = NULL;
}
/* Create and register AMBA PnP bus. */
return ambapp_bus_register(dev, &priv->config);
}
/* Called when a PCI target is found with the PCI device and vendor ID
* given in gr701_ids[].
*/
int gr701_init2(struct drvmgr_dev *dev)
{
struct gr701_priv *priv = dev->priv;
/* Clear any old interrupt requests */
drvmgr_interrupt_clear(dev, 0);
/* Enable System IRQ so that GR-701 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
* board 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, "gr701", gr701_interrupt, priv);
gr701_hw_init2(priv);
return DRVMGR_OK;
}
int ambapp_gr701_int_register(
struct drvmgr_dev *dev,
int irq,
const char *info,
drvmgr_isr handler,
void *arg)
{
struct gr701_priv *priv = dev->parent->dev->priv;
rtems_interrupt_level level;
int status;
rtems_interrupt_disable(level);
status = genirq_register(priv->genirq, irq, handler, arg);
if ( status == 0 ) {
/* Clear IRQ for first registered handler */
priv->pcib->iclear = (1<<irq);
} else if ( status == 1 )
status = 0;
if (status != 0) {
rtems_interrupt_enable(level);
return DRVMGR_FAIL;
}
status = genirq_enable(priv->genirq, irq, handler, arg);
if ( status == 0 ) {
/* Enable IRQ for first enabled handler only */
priv->pcib->imask |= (1<<irq); /* unmask interrupt source */
} else if ( status == 1 )
status = DRVMGR_OK;
rtems_interrupt_enable(level);
return status;
}
int ambapp_gr701_int_unregister(
struct drvmgr_dev *dev,
int irq,
drvmgr_isr isr,
void *arg)
{
struct gr701_priv *priv = dev->parent->dev->priv;
rtems_interrupt_level level;
int status;
rtems_interrupt_disable(level);
status = genirq_disable(priv->genirq, irq, isr, arg);
if ( status == 0 ) {
/* Disable IRQ only when no enabled handler exists */
priv->pcib->imask &= ~(1<<irq); /* mask interrupt source */
}
status = genirq_unregister(priv->genirq, irq, isr, arg);
if ( status != 0 )
status = DRVMGR_FAIL;
rtems_interrupt_enable(level);
return status;
}
int ambapp_gr701_int_unmask(
struct drvmgr_dev *dev,
int irq)
{
struct gr701_priv *priv = dev->parent->dev->priv;
rtems_interrupt_level level;
DBG("GR-701 IRQ %d: enable\n", irq);
if ( genirq_check(priv->genirq, irq) )
return DRVMGR_FAIL;
rtems_interrupt_disable(level);
/* Enable IRQ */
priv->pcib->imask |= (1<<irq); /* unmask interrupt source */
rtems_interrupt_enable(level);
return DRVMGR_OK;
}
int ambapp_gr701_int_mask(
struct drvmgr_dev *dev,
int irq)
{
struct gr701_priv *priv = dev->parent->dev->priv;
rtems_interrupt_level level;
DBG("GR-701 IRQ %d: disable\n", irq);
if ( genirq_check(priv->genirq, irq) )
return DRVMGR_FAIL;
rtems_interrupt_disable(level);
/* Disable IRQ */
priv->pcib->imask &= ~(1<<irq); /* mask interrupt source */
rtems_interrupt_enable(level);
return DRVMGR_OK;
}
int ambapp_gr701_int_clear(
struct drvmgr_dev *dev,
int irq)
{
struct gr701_priv *priv = dev->parent->dev->priv;
if ( genirq_check(priv->genirq, irq) )
return DRVMGR_FAIL;
priv->pcib->iclear = (1<<irq);
return DRVMGR_OK;
}
int ambapp_gr701_get_params(struct drvmgr_dev *dev, struct drvmgr_bus_params *params)
{
struct gr701_priv *priv = dev->parent->dev->priv;
/* Device name prefix pointer, skip /dev */
params->dev_prefix = &priv->prefix[5];
return 0;
}
void gr701_print_dev(struct drvmgr_dev *dev, int options)
{
struct gr701_priv *priv = dev->priv;
struct pci_dev_info *devinfo = priv->devinfo;
unsigned int freq_hz;
uint32_t bar0, bar1, bar0_size, bar1_size;
/* Print */
printf("--- GR-701 [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;
bar1 = devinfo->resources[1].address;
bar1_size = devinfo->resources[1].size;
printf(" PCI BAR[0]: 0x%lx - 0x%lx\n", bar0, bar0 + bar0_size - 1);
printf(" PCI BAR[1]: 0x%lx - 0x%lx\n", bar1, bar1 + bar1_size - 1);
printf(" IRQ: %d\n", devinfo->irq);
/* Frequency is the same as the PCI bus frequency */
drvmgr_freq_get(dev, 0, &freq_hz);
printf(" FREQ: %u Hz\n", freq_hz);
printf(" IMASK: 0x%08x\n", priv->pcib->imask);
printf(" IPEND: 0x%08x\n", priv->pcib->ipend);
/* Print amba config */
if ( options & GR701_OPTIONS_AMBA ) {
ambapp_print(&priv->abus, 10);
}
#if 0
/* Print IRQ handlers and their arguments */
if ( options & GR701_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 gr701_print(int options)
{
struct pci_drv_info *drv = &gr701_info;
struct drvmgr_dev *dev;
dev = drv->general.dev;
while(dev) {
gr701_print_dev(dev, options);
dev = dev->next_in_drv;
}
}
