int demo_open_rt(struct rtdm_dev_context *context,
rtdm_user_info_t *user_info,
int oflags)
{
struct demodrv_context *my_context;
#ifdef USEMMAP
unsigned long vaddr;
#endif
int dev_id = context->device->device_id;
int ret;
// get the context for our driver - used to store driver info
my_context = (struct demodrv_context *)context->dev_private;
#ifdef USEMMAP
// allocate and prepare memory for our buffer
my_context->buf = kmalloc(BUFFER_SIZE, GFP_KERNEL);
/* mark pages reserved so that remap_pfn_range works */
for (vaddr = (unsigned long)my_context->buf;
vaddr < (unsigned long)my_context->buf + BUFFER_SIZE;
vaddr += PAGE_SIZE)
SetPageReserved(virt_to_page(vaddr));
// write some test value to the start of our buffer
*(int *)my_context->buf = 1234;
my_context->mapped_user_addr = NULL;
#endif
// we also have an interrupt handler:
#ifdef TIMERINT
ret = rtdm_irq_request(&my_context->irq_handle, TIMER_INT, demo_interrupt,
0, context->device->proc_name, my_context);
#else
ret = rtdm_irq_request(&my_context->irq_handle, PAR_INT, demo_interrupt,
0, context->device->proc_name, my_context);
#endif
if (ret < 0)
return ret;
/* IPC initialisation - cannot fail with used parameters */
rtdm_lock_init(&my_context->lock);
rtdm_event_init(&my_context->irq_event, 0);
my_context->dev_id = dev_id;
my_context->irq_events = 0;
my_context->irq_event_lock = 0;
my_context->timeout = 0; // wait INFINITE
#ifndef TIMERINT
//set port to interrupt mode; pins are output
outb_p(0x10, BASEPORT + 2);
#endif
// enable interrupt in RTDM
rtdm_irq_enable(&my_context->irq_handle);
return 0;
}
static int trigger_init(void)
{
int err;
/*Aquire Trigger input*/
int numero_interruption = gpio_to_irq(MAIN_TRIGGER);
if ((err = gpio_request(MAIN_TRIGGER, THIS_MODULE->name)) != 0)
{
return err;
}
if ((err = gpio_direction_input(MAIN_TRIGGER)) != 0)
{
gpio_free(MAIN_TRIGGER);
return err;
}
/*Setup interrupt for TRIGGER*/
irq_set_irq_type(numero_interruption, IRQF_TRIGGER_RISING);
if ((err = rtdm_irq_request(&irq_main_trigger,
numero_interruption, gpio_interrupt,
RTDM_IRQTYPE_EDGE,
THIS_MODULE->name, NULL)) != 0)
{
gpio_free(MAIN_TRIGGER);
return err;
}
return 0;
}
static int __init exemple_init (void)
{
int err;
int numero_interruption = gpio_to_irq(GPIO_IN);
if ((err = gpio_request(GPIO_IN, THIS_MODULE->name)) != 0) {
return err;
}
if ((err = gpio_direction_input(GPIO_IN)) != 0) {
gpio_free(GPIO_IN);
return err;
}
if ((err = gpio_request(GPIO_OUT, THIS_MODULE->name)) != 0) {
gpio_free(GPIO_IN);
return err;
}
if ((err = gpio_direction_output(GPIO_OUT, 1)) != 0) {
gpio_free(GPIO_OUT);
gpio_free(GPIO_IN);
return err;
}
irq_set_irq_type(numero_interruption, 0x00000003);
if ((err = rtdm_irq_request(& irq_rtdm,
numero_interruption, handler_interruption,
RTDM_IRQTYPE_EDGE,
THIS_MODULE->name, NULL)) != 0) {
gpio_free(GPIO_OUT);
gpio_free(GPIO_IN);
return err;
}
return 0;
}
static int rt2x00_dev_radio_on(struct _rt2x00_device * device) {
struct _rt2x00_pci *rt2x00pci = rt2x00_priv(device);
u32 reg = 0x00000000;
int retval;
if(rt2x00_pci_alloc_rings(device))
goto exit_fail;
rt2x00_clear_ring(rt2x00pci, &rt2x00pci->rx);
rt2x00_clear_ring(rt2x00pci, &rt2x00pci->tx);
rt2x00_init_ring_register(rt2x00pci);
if(rt2x00_init_registers(rt2x00pci))
goto exit_fail;
rt2x00_init_write_mac(rt2x00pci, device->rtnet_dev);
if(rt2x00_init_bbp(rt2x00pci))
goto exit_fail;
/*
* Clear interrupts.
*/
rt2x00_register_read(rt2x00pci, CSR7, ®);
rt2x00_register_write(rt2x00pci, CSR7, reg);
/* Register rtdm-irq */
retval = rtdm_irq_request(&rt2x00pci->irq_handle,
device->rtnet_dev->irq,
rt2x00_interrupt, 0,
device->rtnet_dev->name,
device->rtnet_dev);
/*
* Enable interrupts.
*/
rt2x00_register_read(rt2x00pci, CSR8, ®);
rt2x00_set_field32(®, CSR8_TBCN_EXPIRE, 0);
rt2x00_set_field32(®, CSR8_TXDONE_TXRING, 0);
rt2x00_set_field32(®, CSR8_TXDONE_ATIMRING, 0);
rt2x00_set_field32(®, CSR8_TXDONE_PRIORING, 0);
rt2x00_set_field32(®, CSR8_RXDONE, 0);
rt2x00_register_write(rt2x00pci, CSR8, reg);
rtdm_irq_enable(&rt2x00pci->irq_handle);
return 0;
exit_fail:
rt2x00_pci_free_rings(device);
return -ENOMEM;
}
static int
tulip_open(/*RTnet*/struct rtnet_device *rtdev)
{
struct tulip_private *tp = (struct tulip_private *)rtdev->priv;
int retval;
if ((retval = /*RTnet*/rtdm_irq_request(&tp->irq_handle, rtdev->irq,
tulip_interrupt, 0, "rt_tulip",
rtdev))) {
printk("%s: Unable to install ISR for IRQ %d\n",
rtdev->name,rtdev->irq);
return retval;
}
rt_stack_connect(rtdev, &STACK_manager);
tulip_init_ring (rtdev);
tulip_up (rtdev);
rtnetif_start_queue (rtdev);
return 0;
}
/* Initialize the CPM Ethernet on SCC. If EPPC-Bug loaded us, or performed
* some other network I/O, a whole bunch of this has already been set up.
* It is no big deal if we do it again, we just have to disable the
* transmit and receive to make sure we don't catch the CPM with some
* inconsistent control information.
*/
int __init scc_enet_init(void)
{
struct rtnet_device *rtdev = NULL;
struct scc_enet_private *cep;
int i, j, k;
unsigned char *eap, *ba;
dma_addr_t mem_addr;
bd_t *bd;
volatile cbd_t *bdp;
volatile cpm8xx_t *cp;
volatile scc_t *sccp;
volatile scc_enet_t *ep;
volatile immap_t *immap;
cp = cpmp; /* Get pointer to Communication Processor */
immap = (immap_t *)(mfspr(IMMR) & 0xFFFF0000); /* and to internal registers */
bd = (bd_t *)__res;
/* Configure the SCC parameters (this has formerly be done
* by macro definitions).
*/
switch (rtnet_scc) {
case 3:
CPM_CR_ENET = CPM_CR_CH_SCC3;
PROFF_ENET = PROFF_SCC3;
SCC_ENET = 2; /* Index, not number! */
CPMVEC_ENET = CPMVEC_SCC3;
break;
case 2:
CPM_CR_ENET = CPM_CR_CH_SCC2;
PROFF_ENET = PROFF_SCC2;
SCC_ENET = 1; /* Index, not number! */
CPMVEC_ENET = CPMVEC_SCC2;
break;
case 1:
CPM_CR_ENET = CPM_CR_CH_SCC1;
PROFF_ENET = PROFF_SCC1;
SCC_ENET = 0; /* Index, not number! */
CPMVEC_ENET = CPMVEC_SCC1;
break;
default:
printk(KERN_ERR "enet: SCC%d doesn't exit (check rtnet_scc)\n", rtnet_scc);
return -1;
}
/* Allocate some private information and create an Ethernet device instance.
*/
rtdev = rtdev_root = rt_alloc_etherdev(sizeof(struct scc_enet_private));
if (rtdev == NULL) {
printk(KERN_ERR "enet: Could not allocate ethernet device.\n");
return -1;
}
rtdev_alloc_name(rtdev, "rteth%d");
rt_rtdev_connect(rtdev, &RTDEV_manager);
RTNET_SET_MODULE_OWNER(rtdev);
rtdev->vers = RTDEV_VERS_2_0;
cep = (struct scc_enet_private *)rtdev->priv;
rtdm_lock_init(&cep->lock);
/* Get pointer to SCC area in parameter RAM.
*/
ep = (scc_enet_t *)(&cp->cp_dparam[PROFF_ENET]);
/* And another to the SCC register area.
*/
sccp = (volatile scc_t *)(&cp->cp_scc[SCC_ENET]);
cep->sccp = (scc_t *)sccp; /* Keep the pointer handy */
/* Disable receive and transmit in case EPPC-Bug started it.
*/
sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
/* Cookbook style from the MPC860 manual.....
* Not all of this is necessary if EPPC-Bug has initialized
* the network.
* So far we are lucky, all board configurations use the same
* pins, or at least the same I/O Port for these functions.....
* It can't last though......
*/
#if (defined(PA_ENET_RXD) && defined(PA_ENET_TXD))
/* Configure port A pins for Txd and Rxd.
*/
immap->im_ioport.iop_papar |= (PA_ENET_RXD | PA_ENET_TXD);
immap->im_ioport.iop_padir &= ~(PA_ENET_RXD | PA_ENET_TXD);
immap->im_ioport.iop_paodr &= ~PA_ENET_TXD;
#elif (defined(PB_ENET_RXD) && defined(PB_ENET_TXD))
/* Configure port B pins for Txd and Rxd.
*/
immap->im_cpm.cp_pbpar |= (PB_ENET_RXD | PB_ENET_TXD);
immap->im_cpm.cp_pbdir &= ~(PB_ENET_RXD | PB_ENET_TXD);
immap->im_cpm.cp_pbodr &= ~PB_ENET_TXD;
#else
#error Exactly ONE pair of PA_ENET_[RT]XD, PB_ENET_[RT]XD must be defined
#endif
#if defined(PC_ENET_LBK)
/* Configure port C pins to disable External Loopback
*/
immap->im_ioport.iop_pcpar &= ~PC_ENET_LBK;
immap->im_ioport.iop_pcdir |= PC_ENET_LBK;
immap->im_ioport.iop_pcso &= ~PC_ENET_LBK;
immap->im_ioport.iop_pcdat &= ~PC_ENET_LBK; /* Disable Loopback */
#endif /* PC_ENET_LBK */
/* Configure port C pins to enable CLSN and RENA.
*/
immap->im_ioport.iop_pcpar &= ~(PC_ENET_CLSN | PC_ENET_RENA);
immap->im_ioport.iop_pcdir &= ~(PC_ENET_CLSN | PC_ENET_RENA);
immap->im_ioport.iop_pcso |= (PC_ENET_CLSN | PC_ENET_RENA);
/* Configure port A for TCLK and RCLK.
*/
immap->im_ioport.iop_papar |= (PA_ENET_TCLK | PA_ENET_RCLK);
immap->im_ioport.iop_padir &= ~(PA_ENET_TCLK | PA_ENET_RCLK);
/* Configure Serial Interface clock routing.
* First, clear all SCC bits to zero, then set the ones we want.
*/
cp->cp_sicr &= ~SICR_ENET_MASK;
cp->cp_sicr |= SICR_ENET_CLKRT;
/* Manual says set SDDR, but I can't find anything with that
* name. I think it is a misprint, and should be SDCR. This
* has already been set by the communication processor initialization.
*/
/* Allocate space for the buffer descriptors in the DP ram.
* These are relative offsets in the DP ram address space.
* Initialize base addresses for the buffer descriptors.
*/
i = m8xx_cpm_dpalloc(sizeof(cbd_t) * RX_RING_SIZE);
ep->sen_genscc.scc_rbase = i;
cep->rx_bd_base = (cbd_t *)&cp->cp_dpmem[i];
i = m8xx_cpm_dpalloc(sizeof(cbd_t) * TX_RING_SIZE);
ep->sen_genscc.scc_tbase = i;
cep->tx_bd_base = (cbd_t *)&cp->cp_dpmem[i];
cep->dirty_tx = cep->cur_tx = cep->tx_bd_base;
cep->cur_rx = cep->rx_bd_base;
/* Issue init Rx BD command for SCC.
* Manual says to perform an Init Rx parameters here. We have
* to perform both Rx and Tx because the SCC may have been
* already running.
* In addition, we have to do it later because we don't yet have
* all of the BD control/status set properly.
cp->cp_cpcr = mk_cr_cmd(CPM_CR_ENET, CPM_CR_INIT_RX) | CPM_CR_FLG;
while (cp->cp_cpcr & CPM_CR_FLG);
*/
/* Initialize function code registers for big-endian.
*/
ep->sen_genscc.scc_rfcr = SCC_EB;
ep->sen_genscc.scc_tfcr = SCC_EB;
/* Set maximum bytes per receive buffer.
* This appears to be an Ethernet frame size, not the buffer
* fragment size. It must be a multiple of four.
*/
ep->sen_genscc.scc_mrblr = PKT_MAXBLR_SIZE;
/* Set CRC preset and mask.
*/
ep->sen_cpres = 0xffffffff;
ep->sen_cmask = 0xdebb20e3;
ep->sen_crcec = 0; /* CRC Error counter */
ep->sen_alec = 0; /* alignment error counter */
ep->sen_disfc = 0; /* discard frame counter */
ep->sen_pads = 0x8888; /* Tx short frame pad character */
ep->sen_retlim = 15; /* Retry limit threshold */
ep->sen_maxflr = PKT_MAXBUF_SIZE; /* maximum frame length register */
ep->sen_minflr = PKT_MINBUF_SIZE; /* minimum frame length register */
ep->sen_maxd1 = PKT_MAXBLR_SIZE; /* maximum DMA1 length */
ep->sen_maxd2 = PKT_MAXBLR_SIZE; /* maximum DMA2 length */
/* Clear hash tables.
*/
ep->sen_gaddr1 = 0;
ep->sen_gaddr2 = 0;
ep->sen_gaddr3 = 0;
ep->sen_gaddr4 = 0;
ep->sen_iaddr1 = 0;
ep->sen_iaddr2 = 0;
ep->sen_iaddr3 = 0;
ep->sen_iaddr4 = 0;
/* Set Ethernet station address.
*/
eap = (unsigned char *)&(ep->sen_paddrh);
#ifdef CONFIG_FEC_ENET
/* We need a second MAC address if FEC is used by Linux */
for (i=5; i>=0; i--)
*eap++ = rtdev->dev_addr[i] = (bd->bi_enetaddr[i] |
(i==3 ? 0x80 : 0));
#else
for (i=5; i>=0; i--)
*eap++ = rtdev->dev_addr[i] = bd->bi_enetaddr[i];
#endif
ep->sen_pper = 0; /* 'cause the book says so */
ep->sen_taddrl = 0; /* temp address (LSB) */
ep->sen_taddrm = 0;
ep->sen_taddrh = 0; /* temp address (MSB) */
/* Now allocate the host memory pages and initialize the
* buffer descriptors.
*/
bdp = cep->tx_bd_base;
for (i=0; i<TX_RING_SIZE; i++) {
/* Initialize the BD for every fragment in the page.
*/
bdp->cbd_sc = 0;
bdp->cbd_bufaddr = 0;
bdp++;
}
/* Set the last buffer to wrap.
*/
bdp--;
bdp->cbd_sc |= BD_SC_WRAP;
bdp = cep->rx_bd_base;
k = 0;
for (i=0; i<CPM_ENET_RX_PAGES; i++) {
/* Allocate a page.
*/
ba = (unsigned char *)consistent_alloc(GFP_KERNEL, PAGE_SIZE, &mem_addr);
/* Initialize the BD for every fragment in the page.
*/
for (j=0; j<CPM_ENET_RX_FRPPG; j++) {
bdp->cbd_sc = BD_ENET_RX_EMPTY | BD_ENET_RX_INTR;
bdp->cbd_bufaddr = mem_addr;
cep->rx_vaddr[k++] = ba;
mem_addr += CPM_ENET_RX_FRSIZE;
ba += CPM_ENET_RX_FRSIZE;
bdp++;
}
}
/* Set the last buffer to wrap.
*/
bdp--;
bdp->cbd_sc |= BD_SC_WRAP;
/* Let's re-initialize the channel now. We have to do it later
* than the manual describes because we have just now finished
* the BD initialization.
*/
cp->cp_cpcr = mk_cr_cmd(CPM_CR_ENET, CPM_CR_INIT_TRX) | CPM_CR_FLG;
while (cp->cp_cpcr & CPM_CR_FLG);
cep->skb_cur = cep->skb_dirty = 0;
sccp->scc_scce = 0xffff; /* Clear any pending events */
/* Enable interrupts for transmit error, complete frame
* received, and any transmit buffer we have also set the
* interrupt flag.
*/
sccp->scc_sccm = (SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
/* Install our interrupt handler.
*/
rtdev->irq = CPM_IRQ_OFFSET + CPMVEC_ENET;
rt_stack_connect(rtdev, &STACK_manager);
if ((i = rtdm_irq_request(&cep->irq_handle, rtdev->irq,
scc_enet_interrupt, 0, "rt_mpc8xx_enet", rtdev))) {
printk(KERN_ERR "Couldn't request IRQ %d\n", rtdev->irq);
rtdev_free(rtdev);
return i;
}
/* Set GSMR_H to enable all normal operating modes.
* Set GSMR_L to enable Ethernet to MC68160.
*/
sccp->scc_gsmrh = 0;
sccp->scc_gsmrl = (SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 | SCC_GSMRL_MODE_ENET);
/* Set sync/delimiters.
*/
sccp->scc_dsr = 0xd555;
/* Set processing mode. Use Ethernet CRC, catch broadcast, and
* start frame search 22 bit times after RENA.
*/
sccp->scc_pmsr = (SCC_PMSR_ENCRC | SCC_PMSR_NIB22);
/* It is now OK to enable the Ethernet transmitter.
* Unfortunately, there are board implementation differences here.
*/
#if (!defined (PB_ENET_TENA) && defined (PC_ENET_TENA))
immap->im_ioport.iop_pcpar |= PC_ENET_TENA;
immap->im_ioport.iop_pcdir &= ~PC_ENET_TENA;
#elif ( defined (PB_ENET_TENA) && !defined (PC_ENET_TENA))
cp->cp_pbpar |= PB_ENET_TENA;
cp->cp_pbdir |= PB_ENET_TENA;
#else
#error Configuration Error: define exactly ONE of PB_ENET_TENA, PC_ENET_TENA
#endif
#if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
/* And while we are here, set the configuration to enable ethernet.
*/
*((volatile uint *)RPX_CSR_ADDR) &= ~BCSR0_ETHLPBK;
*((volatile uint *)RPX_CSR_ADDR) |=
(BCSR0_ETHEN | BCSR0_COLTESTDIS | BCSR0_FULLDPLXDIS);
#endif
#ifdef CONFIG_BSEIP
/* BSE uses port B and C for PHY control.
*/
cp->cp_pbpar &= ~(PB_BSE_POWERUP | PB_BSE_FDXDIS);
cp->cp_pbdir |= (PB_BSE_POWERUP | PB_BSE_FDXDIS);
cp->cp_pbdat |= (PB_BSE_POWERUP | PB_BSE_FDXDIS);
immap->im_ioport.iop_pcpar &= ~PC_BSE_LOOPBACK;
immap->im_ioport.iop_pcdir |= PC_BSE_LOOPBACK;
immap->im_ioport.iop_pcso &= ~PC_BSE_LOOPBACK;
immap->im_ioport.iop_pcdat &= ~PC_BSE_LOOPBACK;
#endif
#ifdef CONFIG_FADS
cp->cp_pbpar |= PB_ENET_TENA;
cp->cp_pbdir |= PB_ENET_TENA;
/* Enable the EEST PHY.
*/
*((volatile uint *)BCSR1) &= ~BCSR1_ETHEN;
#endif
rtdev->base_addr = (unsigned long)ep;
/* The CPM Ethernet specific entries in the device structure. */
rtdev->open = scc_enet_open;
rtdev->hard_start_xmit = scc_enet_start_xmit;
rtdev->stop = scc_enet_close;
rtdev->hard_header = &rt_eth_header;
rtdev->get_stats = scc_enet_get_stats;
if (!rx_pool_size)
rx_pool_size = RX_RING_SIZE * 2;
if (rtskb_pool_init(&cep->skb_pool, rx_pool_size) < rx_pool_size) {
rtdm_irq_disable(&cep->irq_handle);
rtdm_irq_free(&cep->irq_handle);
rtskb_pool_release(&cep->skb_pool);
rtdev_free(rtdev);
return -ENOMEM;
}
if ((i = rt_register_rtnetdev(rtdev))) {
printk(KERN_ERR "Couldn't register rtdev\n");
rtdm_irq_disable(&cep->irq_handle);
rtdm_irq_free(&cep->irq_handle);
rtskb_pool_release(&cep->skb_pool);
rtdev_free(rtdev);
return i;
}
/* And last, enable the transmit and receive processing.
*/
sccp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
printk("%s: CPM ENET Version 0.2 on SCC%d, irq %d, addr %02x:%02x:%02x:%02x:%02x:%02x\n",
rtdev->name, SCC_ENET+1, rtdev->irq,
rtdev->dev_addr[0], rtdev->dev_addr[1], rtdev->dev_addr[2],
rtdev->dev_addr[3], rtdev->dev_addr[4], rtdev->dev_addr[5]);
return 0;
}
static int uart_open_nrt(struct rtdm_dev_context *context,rtdm_user_info_t *user_info_t,int oflags_t)
{
MY_DEV *up=(MY_DEV *)context->device->device_data;
// rtdm_lockctx_t context1;
int retval;
printk("Local struct up=%x\n",up);
f_cir_buf(up);
rtdm_lock_init(&up->lock);
rtdm_event_init(&up->w_event_tx,0);
rtdm_event_init(&up->w_event_rx,0);
printk("name of irq=%s\n",up->name);
retval = request_irq(up->irq, serial_omap_irq,0, up->name, up);
// if (retval)
// return retval;
retval=rtdm_irq_request(&up->irq_handle,up->irq,rtdm_my_isr,0,up->name,up);
if(retval<0)
{
rtdm_printk("error in requesting irq\n");
dev_err(up->dev, "failure requesting irq %i\n", up->irq);
return retval;
}
dev_dbg(up->dev, "serial_omap_startup+%d\n", up->line);
serial_omap_clear_fifos(up);
serial_out(up,UART_MCR,UART_MCR_RTS);
(void)serial_in(up,UART_LSR);
if(serial_in(up,UART_LSR) & UART_LSR_DR)
(void)serial_in(up,UART_RX);
(void)serial_in(up,UART_IIR);
(void)serial_in(up,UART_MSR);
/*
* Now, initialize the UART
*/
serial_out(up, UART_LCR, UART_LCR_WLEN8);
printk("UART has word length of 8 bit\n");
up->msr_saved_flags=0;
//enabling interrupts
up->ier = UART_IER_RLSI | UART_IER_RDI;
serial_out(up,UART_IER,up->ier);
printk("enabling RLSI and RDI interrupt\n");
//enable module level wake up
serial_out(up,UART_OMAP_WER,OMAP_UART_WER_MOD_WKUP);
printk("OMAP_UART_WER_MOD_WKUP\n");
// up->port_activity=jiffies;
return 0;
}
int init_mpu9150_irq(void)
{
void __iomem *mem;
int retval, irq;
uint regval;
rtdm_printk("MPU9150-IRQ: Initializing interrupt interface...\n");
// Preliminary Setup: Step 1: Create a message pipe for use within the ISR
retval = rt_pipe_create(&pipe_desc, "mpu9150", P_MINOR_AUTO, MPU9150_FIFO_DEPTH+synchSize);
if( retval )
{
rtdm_printk("MPU9150-IRQ: Error: Failed to create data flow pipe\n");
return retval;
}
// 1st Step: Request the GPIO lines for the IRQ channels and create the IRQ object
retval = gpio_request_one(mpu9150_irq_desc.gpio_desc.gpio, mpu9150_irq_desc.gpio_desc.flags, mpu9150_irq_desc.gpio_desc.label);
if(retval != 0)
{
irq_gpio_requested = 0;
rtdm_printk("MPU9150-IRQ: Error: Failed to request GPIO pin#%i for IRQ (error %i)\n", mpu9150_irq_desc.gpio_desc.gpio, retval);
return retval;
}
irq_gpio_requested = 1;
irq = gpio_to_irq( mpu9150_irq_desc.gpio_desc.gpio );
if(irq >= 0)
{
irq_requested = 1;
if((retval = rtdm_irq_request(&mpu9150_irq, irq, mpu9150_irq_desc.isr, 0, mpu9150_irq_desc.gpio_desc.label, NULL)) < 0)
{
switch( retval )
{
case -EINVAL:
rtdm_printk("MPU9150-IRQ: ERROR: Invalid parameter was given to rtdm_irq_request().\n");
break;
case -EBUSY:
rtdm_printk("MPU9150-IRQ: ERROR: The requested IRQ line#%i from GPIO#%i is already in use\n", irq, mpu9150_irq_desc.gpio_desc.gpio);
break;
default:
rtdm_printk("MPU9150-IRQ: Unknown error occurred while requesting RTDM IRQ.\n");
}
return retval;
}
rtdm_printk("MPU9150-IRQ: Initialized GPIO #%i to IRQ #%i\n", mpu9150_irq_desc.gpio_desc.gpio, irq);
}
else
{
irq_requested = 0;
rtdm_printk("MPU9150-IRQ: ERROR: Failed to obtain IRQ number for GPIO #%i (error %i)\n", mpu9150_irq_desc.gpio_desc.gpio, retval);
return retval;
}
// 2nd Step: Configure the pin for GPIO input
rtdm_printk("MPU9150-IRQ: Configuring IRQ GPIO pin as follows: SLEW_FAST | INPUT_EN | PULLUP | PULLUPDOWN_DIS | MODE_7....\n");
mem = ioremap(GPMC_CONF_ADDR_START, GPMC_CONF_ADDR_SIZE);
if( !mem )
{
rtdm_printk("MPU9150-IRQ: ERROR: Failed to remap memory for IRQ pin configuration.\n");
return -ENOMEM;
}
// Configure GPIO2_4 pin 0-7 output
// Write the pin configuration
iowrite8((SLEW_FAST | INPUT_EN | PULLUP | PULLUPDOWN_DIS | M7), mem + CONF_GPMC_WEN);
// close the pin conf address space
iounmap( mem );
// GPIO Bank 2: Setup the IRQ registers with the appropriate values
mem = ioremap(GPIO2_START_ADDR, GPIO2_SIZE);
if( !mem )
{
rtdm_printk("MPU9150-IRQ: ERROR: Failed to remap memory for GPIO Bank 2 IRQ pin configuration.\n");
return -ENOMEM;
}
// Enable the IRQ ability for GPIO2_4
regval = ioread32(mem + GPIO_IRQSTATUS_0);
regval |= GPIO_4;
iowrite32(regval, mem + GPIO_IRQSTATUS_0);
// Set Pin 4 for rising- and falling- edge detection
regval = ioread32(mem + GPIO_RISINGDETECT);
regval |= GPIO_4;
iowrite32(regval, mem + GPIO_RISINGDETECT);
// Release the mapped memory
iounmap( mem );
// 3rd Step: Setup the IRQ controller to read the H/W interrupts
mem = ioremap(INTC_REG_START, INTC_REG_SIZE);
if( !mem )
{
rtdm_printk("MPU9150-IRQ: ERROR: Failed to remap IRQ Control Registers memory\n");
return -ENOMEM;
}
// Disable clock gating strategy for the. Will use more
// power with this strategy disabled, but will decrease
// latency.
iowrite32(0x0, mem + INTC_SYSCONFIG);
// Disable the input synchronizer auto-gating and the
// functional clock auto-idle modes. This will use more
// power, but will decrease latency.
iowrite32(0x1, mem + INTC_IDLE);
// For each IRQ line, set the highest priority (0) and
// route to the IRQ, not the FIQ (GPIOs cannot be routed
// to FIQ)
iowrite8(0x0, mem + INTC_ILR68);
// Unmask the the GPIO lines to enable interrupts on those GPIO lines
iowrite32(GPIO_4, mem + INTC_MIR_CLEAR2);
// Close the IRQ Control registers memory
iounmap( mem );
rtdm_printk("MPU9150-IRQ: Interrupt interface initialization complete!\n");
return 0;
}
