/*
* This function frees all buffers
*/
static void audio_clear_buf(audio_stream_t * s)
{
DECLARE_WAITQUEUE(wait, current);
int frag;
if (!s->buffers)
return;
/* Ensure DMA isn't running */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&s->stop_wq, &wait);
DCSR(s->dma_ch) = DCSR_STOPIRQEN;
schedule();
remove_wait_queue(&s->stop_wq, &wait);
/* free DMA buffers */
for (frag = 0; frag < s->nbfrags; frag++) {
audio_buf_t *b = &s->buffers[frag];
if (!b->master)
continue;
consistent_free(b->data, b->master, b->dma_desc->dsadr);
}
/* free descriptor ring */
if (s->buffers->dma_desc)
consistent_free(s->buffers->dma_desc,
s->nbfrags * s->descs_per_frag * DMA_DESC_SIZE,
s->dma_desc_phys);
/* free buffer structure array */
kfree(s->buffers);
s->buffers = NULL;
}
static void audio_clear_buf(audio_stream_t * s)
{
DPRINTK("audio_clear_buf\n");
/* ensure DMA won't run anymore */
s->active = 0;
s->stopped = 0;
sa1100_dma_flush_all(s->dma_ch);
if (s->buffers) {
int frag;
for (frag = 0; frag < s->nbfrags; frag++) {
if (!s->buffers[frag].master)
continue;
consistent_free(s->buffers[frag].start,
s->buffers[frag].master,
s->buffers[frag].dma_addr);
}
kfree(s->buffers);
s->buffers = NULL;
}
s->buf_idx = 0;
s->buf = NULL;
}
static void dma_direct_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
#ifdef NOT_COHERENT_CACHE
consistent_free(size, vaddr);
#else
free_pages((unsigned long)vaddr, get_order(size));
#endif
}
static int pxa250_irda_stop(struct net_device *dev)
{
struct pxa250_irda *si = dev->priv;
printk(KERN_ERR "Irda stop... RX = %d TX = %d\n",rx_count,tx_count);
disable_irq(dev->irq);
disable_irq(si->fir_irq);
/* pxa250_irda_shutdown(si); */
/*
* If we have been doing DMA receive, make sure we
* tidy that up cleanly.
*/
if (si->rxskb) {
dev_kfree_skb(si->rxskb);
si->rxskb = NULL;
}
/* Stop IrLAP */
if (si->irlap) {
irlap_close(si->irlap);
si->irlap = NULL;
}
consistent_free (si->txbuf_dma_virt,HPSIR_MAX_TXLEN,si->txbuf_dma);
consistent_free (si->rxbuf_dma_virt,HPSIR_MAX_RXLEN,si->rxbuf_dma);
pxa_free_dma(si->txdma_ch);
pxa_free_dma(si->rxdma_ch);
netif_stop_queue(dev);
si->open = 0;
/*
* Free resources
*/
free_irq(dev->irq, dev);
free_irq(si->fir_irq, dev);
MOD_DEC_USE_COUNT;
return 0;
}
static int camif_demalloc(camif_cfg_t *cfg)
{ __D("\n");
#if defined(P_DEDICATED_MEM) || defined(C_DEDICATED_MEM)
iounmap(cfg->pp_virt_buf);
cfg->pp_virt_buf = 0;
#else
if ( cfg->pp_virt_buf ) {
consistent_free(cfg->pp_virt_buf,cfg->pp_totalsize,cfg->pp_phys_buf);
cfg->pp_virt_buf = 0;
}
#endif
return 0;
}
static void __exit test_mcspi_exit(void)
{
spi_unregister_driver(&spitst_spi);
if (test_mcspi_smp)
spi_unregister_driver(&spitst_spi2);
remove_proc_file_entries();
if (buffers_allocated == 1) {
if (test_mcspi_smp) {
#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 00))
consistent_free((void *)spi2_rx_buf_dma_virt2, buffer_size,
spi2_rx_buf_dma_phys2);
consistent_free((void *)spi2_tx_buf_dma_virt2, buffer_size,
spi2_tx_buf_dma_phys2);
#else
dma_free_coherent(NULL, buffer_size,
(void *)spi2_rx_buf_dma_virt2, spi2_rx_buf_dma_phys2);
dma_free_coherent(NULL, buffer_size,
(void *)spi2_tx_buf_dma_virt2, spi2_tx_buf_dma_phys2);
#endif
}
#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 00))
consistent_free((void *)spi2_rx_buf_dma_virt2, buffer_size,
spi2_rx_buf_dma_phys2);
consistent_free((void *)spi2_tx_buf_dma_virt2, buffer_size,
spi2_tx_buf_dma_phys2);
#else
dma_free_coherent(NULL, buffer_size,
(void *)spi2_rx_buf_dma_virt2, spi2_rx_buf_dma_phys2);
dma_free_coherent(NULL, buffer_size,
(void *)spi2_tx_buf_dma_virt2, spi2_tx_buf_dma_phys2);
#endif
}
return;
}
static void omap_mmc_slot_cleanup( void )
{
long flags;
local_irq_save(flags);
omap_mmc_slot_down();
free_irq(INT_FPGA_CD, &g_omap_mmc_data);
free_irq(INT_MMC, &g_omap_mmc_data);
/* Free DMA buffers */
consistent_free(g_omap_mmc_data.buf_dma_virt, 2048, g_omap_mmc_data.buf_dma_phys);
local_irq_restore(flags);
}
/*
* Destroy a scatter/gather list handle that was created by alloc_dma_handle().
* The list must be empty (contain no elements).
*/
void
ppc4xx_free_dma_handle(sgl_handle_t handle)
{
sgl_list_info_t *psgl = (sgl_list_info_t *) handle;
if (!handle) {
printk("ppc4xx_free_dma_handle: got NULL\n");
return;
} else if (psgl->phead) {
printk("ppc4xx_free_dma_handle: list not empty\n");
return;
} else if (!psgl->dma_addr) { /* should never happen */
printk("ppc4xx_free_dma_handle: no dma address\n");
return;
}
consistent_free((void *) psgl);
}
static void audio_discard_buf(audio_stream_t * s)
{
DPRINTK("audio_discard_buf\n");
/* ensure DMA isn't using those buffers */
audio_reset(s);
if (s->buffers) {
int frag;
for (frag = 0; frag < s->nbfrags; frag++) {
if (!s->buffers[frag].master)
continue;
consistent_free(s->buffers[frag].data,
s->buffers[frag].master,
s->buffers[frag].dma_addr);
}
kfree(s->buffers);
s->buffers = NULL;
}
}
/*
* Free the head of our info_list and remove it from the list. Note
* that this function does *not* unregister_framebuffer(). That is up
* to the caller to do if it is appropriate.
*/
static void
remove_head_info(void)
{
struct xilinxfb_info *i;
/* Pull the head off of info_list. */
spin_lock(&info_lock);
i = info_list;
info_list = i->next;
spin_unlock(&info_lock);
if (i->regs) {
/* Turn off the display; the frame buffer is going away. */
out_be32(i->regs + REG_CTRL, 0);
iounmap(i->regs);
}
if (i->fb_virt_start)
consistent_free((void *)i->fb_virt_start);
kfree(i);
}
static void frv_dma_free(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle, struct dma_attrs *attrs)
{
consistent_free(vaddr);
}
static int pxa250_irda_start(struct net_device *dev)
{
struct pxa250_irda *si = dev->priv;
int err;
unsigned int flags;
MOD_INC_USE_COUNT;
__ECHO_IN;
si->speed = 9600;
local_irq_save(flags);
err = request_irq(si->fir_irq, pxa250_irda_fir_irq, 0, dev->name, dev);
if (err)
goto err_fir_irq;
err = request_irq(dev->irq, pxa250_irda_irq, 0, dev->name, dev);
if (err)
goto err_irq;
/*
* The interrupt must remain disabled for now.
*/
disable_irq(dev->irq);
disable_irq(si->fir_irq);
local_irq_restore(flags);
/* Allocate DMA channel for receiver (not used) */
err = pxa_request_dma("IrDA receive", DMA_PRIO_LOW, pxa250_irda_rxdma_irq, dev);
if (err < 0 )
goto err_rx_dma;
si->rxdma_ch=err;
DRCMRRXICDR = DRCMR_MAPVLD | si->rxdma_ch;
/* Allocate DMA channel for transmit */
err = pxa_request_dma("IrDA transmit", DMA_PRIO_LOW, pxa250_irda_txdma_irq , dev);
if (err < 0 )
goto err_tx_dma;
si->txdma_ch=err;
/*
* Make sure that ICP will be able
* to assert the transmit dma request bit
* through the peripherals request bus (PREQ)
*/
DRCMRTXICDR = DRCMR_MAPVLD | si->txdma_ch;
DBG("rx(not used) channel=%d tx channel=%d\n",si->rxdma_ch,si->txdma_ch);
/* allocate consistent buffers for dma access
* buffers have to be aligned and situated in dma capable memory region;
*/
si->rxbuf_dma_virt = consistent_alloc(GFP_KERNEL | GFP_DMA ,HPSIR_MAX_RXLEN , &si->rxbuf_dma);
if (! si->rxbuf_dma_virt )
goto err_rxbuf_dma;
si->txbuf_dma_virt = consistent_alloc(GFP_KERNEL | GFP_DMA, HPSIR_MAX_TXLEN, &si->txbuf_dma);
if (! si->txbuf_dma_virt )
goto err_txbuf_dma;
/* Alocate skb for receiver */
err=pxa250_irda_rx_alloc(si);
if (err)
goto err_rx_alloc;
/*
* Setup the serial port for the specified config.
*/
err = pxa250_irda_startup(dev);
if (err)
goto err_startup;
pxa250_irda_set_speed(dev,si->speed = 9600);
/*
* Open a new IrLAP layer instance.
*/
si->irlap = irlap_open(dev, &si->qos, "pxa250");
err = -ENOMEM;
if (!si->irlap)
goto err_irlap;
/*
* Now enable the interrupt and start the queue
*/
si->open = 1;
enable_irq(dev->irq);
netif_start_queue(dev);
return 0;
err_irlap:
si->open = 0;
pxa250_sir_irda_shutdown(si);
err_startup:
dev_kfree_skb(si->rxskb);
err_rx_alloc:
consistent_free (si->txbuf_dma_virt,HPSIR_MAX_TXLEN,si->txbuf_dma);
err_txbuf_dma:
consistent_free (si->rxbuf_dma_virt,HPSIR_MAX_RXLEN,si->rxbuf_dma);
err_rxbuf_dma:
pxa_free_dma(si->txdma_ch);
err_tx_dma:
pxa_free_dma(si->rxdma_ch);
err_rx_dma:
free_irq(dev->irq, dev);
err_irq:
free_irq(si->fir_irq, dev);
err_fir_irq:
MOD_DEC_USE_COUNT;
return err;
}
void dma_free_coherent(struct device *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle)
{
consistent_free(vaddr);
}
void
dma_free_coherent(void *p, int size, void *ptr, dma_addr_t phys)
{
consistent_free(ptr, size, phys);
}