static void aes_dma_cleanup(struct aes_hwa_ctx *ctx)
{
omap_free_dma(ctx->dma_lch_out);
omap_free_dma(ctx->dma_lch_in);
dma_free_coherent(NULL, ctx->buflen, ctx->buf_in, ctx->dma_addr_in);
dma_free_coherent(NULL, ctx->buflen, ctx->buf_out, ctx->dma_addr_out);
iounmap(omap_dma_base);
}
static int __devexit omap2_onenand_remove(struct platform_device *pdev)
{
struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
BUG_ON(c == NULL);
#ifdef CONFIG_MTD_PARTITIONS
if (c->parts)
del_mtd_partitions(&c->mtd);
else
del_mtd_device(&c->mtd);
#else
del_mtd_device(&c->mtd);
#endif
onenand_release(&c->mtd);
if (c->dma_channel != -1)
omap_free_dma(c->dma_channel);
omap2_onenand_shutdown(pdev);
platform_set_drvdata(pdev, NULL);
if (c->gpio_irq) {
free_irq(gpio_to_irq(c->gpio_irq), c);
gpio_free(c->gpio_irq);
}
iounmap(c->onenand.base);
release_mem_region(c->phys_base, ONENAND_IO_SIZE);
gpmc_cs_free(c->gpmc_cs);
kfree(c);
return 0;
}
void omap3isp_hist_cleanup(struct isp_device *isp)
{
if (HIST_USING_DMA(&isp->isp_hist))
omap_free_dma(isp->isp_hist.dma_ch);
kfree(isp->isp_hist.priv);
omap3isp_stat_cleanup(&isp->isp_hist);
}
static int __exit omap1_cam_remove(struct platform_device *pdev)
{
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
struct omap1_cam_dev *pcdev = container_of(soc_host,
struct omap1_cam_dev, soc_host);
struct resource *res;
free_irq(pcdev->irq, pcdev);
omap_free_dma(pcdev->dma_ch);
soc_camera_host_unregister(soc_host);
iounmap(pcdev->base);
res = pcdev->res;
release_mem_region(res->start, resource_size(res));
clk_put(pcdev->clk);
kfree(pcdev);
dev_info(&pdev->dev, "OMAP1 Camera Interface driver unloaded\n");
return 0;
}
int omap_free_sound_dma(void *data, int **channels)
{
int i;
int *chan = NULL;
FN_IN;
if (unlikely(NULL == channels)) {
BUG();
return -EPERM;
}
if (unlikely(NULL == *channels)) {
BUG();
return -EPERM;
}
chan = (*channels);
if (!cpu_is_omap1510())
omap_sound_dma_unlink_lch(data);
for (i = 0; i < nr_linked_channels; i++) {
int cur_chan = chan[i];
omap_stop_dma(cur_chan);
omap_free_dma(cur_chan);
}
kfree(*channels);
*channels = NULL;
FN_OUT(0);
return 0;
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
/*
* Check if dma is still active. If yes do nothing,
* return. Else stop dma
*/
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
serial_omap_port_disable(up);
}
serial_omap_port_enable(up);
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
serial_omap_port_disable(up);
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
pm_runtime_get_sync(&up->pdev->dev);
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
if (!up->use_dma && pdata && pdata->set_forceidle)
pdata->set_forceidle(up->pdev);
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
/**
* @brief omap_free_dma_chain - Free all the logical channels in a chain.
*
* @param chain_id
*
* @return - Success : 0
* Failure : -EINVAL
*/
int omap_free_dma_chain(int chain_id)
{
int *channels;
u32 i;
/* Check for input params */
if (unlikely((chain_id < 0 || chain_id >= dma_lch_count))) {
IOLog("Invalid chain id\n");
return -EINVAL;
}
/* Check if the chain exists */
if (dma_linked_lch[chain_id].linked_dmach_q == NULL) {
IOLog("Chain doesn't exists\n");
return -EINVAL;
}
channels = dma_linked_lch[chain_id].linked_dmach_q;
for (i = 0; i < dma_linked_lch[chain_id].no_of_lchs_linked; i++) {
dma_chan[channels[i]].next_linked_ch = -1;
dma_chan[channels[i]].prev_linked_ch = -1;
dma_chan[channels[i]].chain_id = -1;
dma_chan[channels[i]].state = DMA_CH_NOTSTARTED;
omap_free_dma(channels[i]);
}
free(channels);
dma_linked_lch[chain_id].linked_dmach_q = NULL;
dma_linked_lch[chain_id].chain_mode = -1;
dma_linked_lch[chain_id].chain_state = -1;
return (0);
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma) {
if (up->uart_dma.tx_dma_channel != 0xFF) {
/*
* Check if dma is still active . If yes do nothing , return.
* Else stop dma
*/
int status = omap_readl(OMAP34XX_DMA4_BASE + OMAP_DMA4_CCR(up->uart_dma.tx_dma_channel));
if (status & (1 << 7))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = 0xFF;
}
}
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
#ifdef CONFIG_OMAP3_PM
if (!up->uart_dma.rx_dma_state) {
unsigned int tmp;
tmp = (serial_in(up, UART_OMAP_SYSC) & 0x7) | (2 << 3);
serial_out(up, UART_OMAP_SYSC, tmp); /* smart-idle */
}
#endif
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
/*
* Check if dma is still active. If yes do nothing,
* return. Else stop dma
*/
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
pm_runtime_get_sync(&up->pdev->dev);
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
/*
* Check if dma is still active. If yes do nothing,
* return. Else stop dma
*/
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
}
if (!(up->rs485.flags & SER_RS485_ENABLED)) {
serial_omap_disable_ier_thri(up);
return;
}
up->tx_wait_end = 1;
serial_omap_thri_mode(up);
serial_omap_enable_ier_thri(up);
}
/*
* DMA call back function
*/
static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *data)
{
struct omap_hsmmc_host *host = data;
if (ch_status & OMAP2_DMA_MISALIGNED_ERR_IRQ)
dev_dbg(mmc_dev(host->mmc), "MISALIGNED_ADRS_ERR\n");
if (host->dma_ch < 0)
return;
host->dma_sg_idx++;
if (host->dma_sg_idx < host->dma_len) {
/* Fire up the next transfer. */
omap_hsmmc_config_dma_params(host, host->data,
host->data->sg + host->dma_sg_idx);
return;
}
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
/*
* DMA Callback: run in interrupt context.
* mutex_unlock will throw a kernel warning if used.
*/
up(&host->sem);
}
static void
mmc_omap_dma_timer(unsigned long data)
{
struct mmc_omap_host *host = (struct mmc_omap_host *) data;
BUG_ON(host->dma_ch < 0);
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
}
/*
* Routine to configure and start DMA for the MMC card
*/
static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
struct mmc_request *req)
{
int dma_ch = 0, ret = 0, err = 1, i;
struct mmc_data *data = req->data;
/* Sanity check: all the SG entries must be aligned by block size. */
for (i = 0; i < data->sg_len; i++) {
struct scatterlist *sgl;
sgl = data->sg + i;
if (sgl->length % data->blksz)
return -EINVAL;
}
if ((data->blksz % 4) != 0)
/* REVISIT: The MMC buffer increments only when MSB is written.
* Return error for blksz which is non multiple of four.
*/
return -EINVAL;
/*
* If for some reason the DMA transfer is still active,
* we wait for timeout period and free the dma
*/
if (host->dma_ch != -1) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(100);
if (down_trylock(&host->sem)) {
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
up(&host->sem);
return err;
}
} else {
if (down_trylock(&host->sem))
return err;
}
ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data),
"MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch);
if (ret != 0) {
dev_err(mmc_dev(host->mmc),
"%s: omap_request_dma() failed with %d\n",
mmc_hostname(host->mmc), ret);
return ret;
}
host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
data->sg_len, omap_hsmmc_get_dma_dir(host, data));
host->dma_ch = dma_ch;
host->dma_sg_idx = 0;
omap_hsmmc_config_dma_params(host, data, data->sg);
return 0;
}
static void serial_omap_stop_rxdma(struct uart_omap_port *up)
{
if (up->uart_dma.rx_dma_state) {
del_timer(&up->uart_dma.rx_timer);
omap_stop_dma(up->uart_dma.rx_dma_channel);
omap_free_dma(up->uart_dma.rx_dma_channel);
up->uart_dma.rx_dma_channel = 0xFF;
up->uart_dma.rx_dma_state = 0x0;
}
}
static void serial_omap_stop_rxdma(struct uart_omap_port *up)
{
if (up->uart_dma.rx_dma_used) {
del_timer(&up->uart_dma.rx_timer);
omap_stop_dma(up->uart_dma.rx_dma_channel);
omap_free_dma(up->uart_dma.rx_dma_channel);
up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE;
up->uart_dma.rx_dma_used = false;
}
}
static void serial_omap_stop_rxdma(struct uart_omap_port *up)
{
if (up->uart_dma.rx_dma_used) {
del_timer(&up->uart_dma.rx_timer);
omap_stop_dma(up->uart_dma.rx_dma_channel);
omap_free_dma(up->uart_dma.rx_dma_channel);
up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE;
up->uart_dma.rx_dma_used = false;
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
}
static void omap_mmc_tx_dma_callback (void *data, int size)
{
omap_free_dma(g_omap_mmc_data.dma_regs);
g_omap_mmc_data.dma_regs = NULL;
g_omap_mmc_data.request->buffer += g_omap_mmc_data.request->block_len;
g_omap_mmc_data.request->nob--;
DEBUG(3, ": TX Transfer finished. Status: %d\n", inw(OMAP_MMC_STAT));
}
/*
* Release the VRFB context once the module exits
*/
void omap_vout_release_vrfb(struct omap_vout_device *vout)
{
int i;
for (i = 0; i < VRFB_NUM_BUFS; i++)
omap_vrfb_release_ctx(&vout->vrfb_context[i]);
if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) {
vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
omap_free_dma(vout->vrfb_dma_tx.dma_ch);
}
}
static void abe_dbg_stop_dma(struct omap_abe *abe)
{
/* Since we are using self linking, there is a
chance that the DMA as re-enabled the channel just after disabling it */
while (omap_get_dma_active_status(abe->debugfs.dma_ch))
omap_stop_dma(abe->debugfs.dma_ch);
if (abe->debugfs.circular)
omap_dma_unlink_lch(abe->debugfs.dma_ch, abe->debugfs.dma_ch);
omap_free_dma(abe->debugfs.dma_ch);
pm_runtime_put_sync(abe->dev);
}
/*
* DMA clean up for command errors
*/
static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
{
host->data->error = errno;
if (host->use_dma && host->dma_ch != -1) {
dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, host->dma_len,
omap_hsmmc_get_dma_dir(host, host->data));
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
up(&host->sem);
}
host->data = NULL;
}
int omap_request_alsa_sound_dma(int device_id, const char *device_name,
void *data, int **channels)
{
int i, err = 0;
int *chan = NULL;
FN_IN;
if (unlikely((NULL == channels) || (NULL == device_name))) {
BUG();
return -EPERM;
}
/* Try allocate memory for the num channels */
*channels = kmalloc(sizeof(int) * nr_linked_channels, GFP_KERNEL);
chan = *channels;
if (NULL == chan) {
ERR("No Memory for channel allocs!\n");
FN_OUT(-ENOMEM);
return -ENOMEM;
}
spin_lock(&dma_list_lock);
for (i = 0; i < nr_linked_channels; i++) {
err = omap_request_dma(device_id,
device_name,
sound_dma_irq_handler,
data,
&chan[i]);
/* Handle Failure condition here */
if (err < 0) {
int j;
for (j = 0; j < i; j++)
omap_free_dma(chan[j]);
spin_unlock(&dma_list_lock);
kfree(chan);
*channels = NULL;
ERR("Error in requesting channel %d=0x%x\n", i,
err);
FN_OUT(err);
return err;
}
}
/* Chain the channels together */
if (!cpu_is_omap15xx())
omap_sound_dma_link_lch(data);
spin_unlock(&dma_list_lock);
FN_OUT(0);
return 0;
}
/*
* DMA clean up for command errors
*/
static void mmc_dma_cleanup(struct mmc_omap_host *host)
{
host->data->error = -ETIMEDOUT;
if (host->use_dma && host->dma_ch != -1) {
dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, host->dma_len,
host->dma_dir);
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
up(&host->sem);
}
host->data = NULL;
host->datadir = OMAP_MMC_DATADIR_NONE;
}
static int omap_irda_stop(struct net_device *dev)
{
struct omap_irda *omap_ir = netdev_priv(dev);
disable_irq(dev->irq);
netif_stop_queue(dev);
omap_free_dma(omap_ir->rx_dma_channel);
omap_free_dma(omap_ir->tx_dma_channel);
if (omap_ir->rx_buf_dma_virt)
dma_free_coherent(NULL, IRDA_SKB_MAX_MTU,
omap_ir->rx_buf_dma_virt,
omap_ir->rx_buf_dma_phys);
if (omap_ir->tx_buf_dma_virt)
dma_free_coherent(NULL, IRDA_SIR_MAX_FRAME,
omap_ir->tx_buf_dma_virt,
omap_ir->tx_buf_dma_phys);
omap_irda_shutdown(omap_ir);
/* Stop IrLAP */
if (omap_ir->irlap) {
irlap_close(omap_ir->irlap);
omap_ir->irlap = NULL;
}
omap_ir->open = 0;
/*
* Free resources
*/
free_irq(dev->irq, dev);
return 0;
}
static int omap1610_irda_stop(struct net_device *dev)
{
struct omap1610_irda *si = dev->priv;
__ECHO_IN;
disable_irq(dev->irq);
netif_stop_queue(dev);
omap_free_dma(si->rx_dma_channel);
omap_free_dma(si->tx_dma_channel);
dma_free_coherent(NULL, 4096, si->rx_buf_dma_virt, si->rx_buf_dma_phys);
dma_free_coherent(NULL, 4096, si->tx_buf_dma_virt, si->tx_buf_dma_phys);
omap1610_irda_shutdown(si);
/* Stop IrLAP */
if (si->irlap) {
irlap_close(si->irlap);
si->irlap = NULL;
}
si->open = 0;
/*
* Free resources
*/
free_irq(dev->irq, dev);
__ECHO_OUT;
return 0;
}
static int omap_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
if (prtd->dma_data == NULL)
return 0;
omap_dma_unlink_lch(prtd->dma_ch, prtd->dma_ch);
omap_free_dma(prtd->dma_ch);
prtd->dma_data = NULL;
snd_pcm_set_runtime_buffer(substream, NULL);
return 0;
}
static void omap_mmc_rx_dma_callback (void *data, int size)
{
memcpy(g_omap_mmc_data.request->buffer, g_omap_mmc_data.buf_dma_virt,
g_omap_mmc_data.request->block_len);
omap_free_dma(g_omap_mmc_data.dma_regs);
g_omap_mmc_data.dma_regs = NULL;
g_omap_mmc_data.request->buffer += g_omap_mmc_data.request->block_len;
DEBUG(3,": RX Transfer finished\n");
g_omap_mmc_data.request->nob--;
omap_mmc_handle_int( &g_omap_mmc_data, inw(OMAP_MMC_STAT));
}
/*
* DMA call back function
*/
static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
{
struct mmc_omap_host *host = data;
if (ch_status & OMAP2_DMA_MISALIGNED_ERR_IRQ)
dev_dbg(mmc_dev(host->mmc), "MISALIGNED_ADRS_ERR\n");
if (host->dma_ch < 0)
return;
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
/*
* DMA Callback: run in interrupt context.
* mutex_unlock will through a kernel warning if used.
*/
up(&host->sem);
}
static void dma_channel_release(struct dma_channel *channel)
{
struct musb_dma_channel *musb_channel = channel->private_data;
channel->actual_len = 0;
musb_channel->start_addr = 0;
musb_channel->len = 0;
musb_channel->controller->used_channels &=
~(1 << musb_channel->idx);
channel->status = MUSB_DMA_STATUS_UNKNOWN;
if (musb_channel->sysdma_channel != -1) {
omap_stop_dma(musb_channel->sysdma_channel);
omap_free_dma(musb_channel->sysdma_channel);
musb_channel->sysdma_channel = -1;
}
}
static int omap2_onenand_remove(struct platform_device *pdev)
{
struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
onenand_release(&c->mtd);
regulator_put(c->regulator);
if (c->dma_channel != -1)
omap_free_dma(c->dma_channel);
omap2_onenand_shutdown(pdev);
if (c->gpio_irq) {
free_irq(gpio_to_irq(c->gpio_irq), c);
gpio_free(c->gpio_irq);
}
iounmap(c->onenand.base);
release_mem_region(c->phys_base, c->mem_size);
kfree(c);
return 0;
}