static int ux500_dma_controller_start(struct ux500_dma_controller *controller)
{
struct ux500_dma_channel *ux500_channel = NULL;
struct musb *musb = controller->private_data;
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
struct ux500_musb_board_data *data;
struct dma_channel *dma_channel = NULL;
char **chan_names;
u32 ch_num;
u8 dir;
u8 is_tx = 0;
void **param_array;
struct ux500_dma_channel *channel_array;
dma_cap_mask_t mask;
if (!plat) {
dev_err(musb->controller, "No platform data\n");
return -EINVAL;
}
data = plat->board_data;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
/* Prepare the loop for RX channels */
channel_array = controller->rx_channel;
param_array = data ? data->dma_rx_param_array : NULL;
chan_names = (char **)iep_chan_names;
for (dir = 0; dir < 2; dir++) {
for (ch_num = 0;
ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS;
ch_num++) {
ux500_channel = &channel_array[ch_num];
ux500_channel->controller = controller;
ux500_channel->ch_num = ch_num;
ux500_channel->is_tx = is_tx;
dma_channel = &(ux500_channel->channel);
dma_channel->private_data = ux500_channel;
dma_channel->status = MUSB_DMA_STATUS_FREE;
dma_channel->max_len = SZ_16M;
ux500_channel->dma_chan =
dma_request_slave_channel(dev, chan_names[ch_num]);
if (!ux500_channel->dma_chan)
ux500_channel->dma_chan =
dma_request_channel(mask,
data ?
data->dma_filter :
NULL,
param_array[ch_num]);
if (!ux500_channel->dma_chan) {
ERR("Dma pipe allocation error dir=%d ch=%d\n",
dir, ch_num);
/* Release already allocated channels */
ux500_dma_controller_stop(controller);
return -EBUSY;
}
}
/* Prepare the loop for TX channels */
channel_array = controller->tx_channel;
param_array = data ? data->dma_tx_param_array : NULL;
chan_names = (char **)oep_chan_names;
is_tx = 1;
}
return 0;
}
static int mmp_tdma_probe(struct platform_device *pdev)
{
enum mmp_tdma_type type;
const struct of_device_id *of_id;
struct mmp_tdma_device *tdev;
struct resource *iores;
int i, ret;
int irq = 0, irq_num = 0;
int chan_num = TDMA_CHANNEL_NUM;
struct gen_pool *pool = NULL;
of_id = of_match_device(mmp_tdma_dt_ids, &pdev->dev);
if (of_id)
type = (enum mmp_tdma_type) of_id->data;
else
type = platform_get_device_id(pdev)->driver_data;
/* always have couple channels */
tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL);
if (!tdev)
return -ENOMEM;
tdev->dev = &pdev->dev;
for (i = 0; i < chan_num; i++) {
if (platform_get_irq(pdev, i) > 0)
irq_num++;
}
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
tdev->base = devm_ioremap_resource(&pdev->dev, iores);
if (IS_ERR(tdev->base))
return PTR_ERR(tdev->base);
INIT_LIST_HEAD(&tdev->device.channels);
if (pdev->dev.of_node)
pool = of_gen_pool_get(pdev->dev.of_node, "asram", 0);
else
pool = sram_get_gpool("asram");
if (!pool) {
dev_err(&pdev->dev, "asram pool not available\n");
return -ENOMEM;
}
if (irq_num != chan_num) {
irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(&pdev->dev, irq,
mmp_tdma_int_handler, 0, "tdma", tdev);
if (ret)
return ret;
}
/* initialize channel parameters */
for (i = 0; i < chan_num; i++) {
irq = (irq_num != chan_num) ? 0 : platform_get_irq(pdev, i);
ret = mmp_tdma_chan_init(tdev, i, irq, type, pool);
if (ret)
return ret;
}
dma_cap_set(DMA_SLAVE, tdev->device.cap_mask);
dma_cap_set(DMA_CYCLIC, tdev->device.cap_mask);
tdev->device.dev = &pdev->dev;
tdev->device.device_alloc_chan_resources =
mmp_tdma_alloc_chan_resources;
tdev->device.device_free_chan_resources =
mmp_tdma_free_chan_resources;
tdev->device.device_prep_dma_cyclic = mmp_tdma_prep_dma_cyclic;
tdev->device.device_tx_status = mmp_tdma_tx_status;
tdev->device.device_issue_pending = mmp_tdma_issue_pending;
tdev->device.device_config = mmp_tdma_config;
tdev->device.device_pause = mmp_tdma_pause_chan;
tdev->device.device_resume = mmp_tdma_resume_chan;
tdev->device.device_terminate_all = mmp_tdma_terminate_all;
tdev->device.copy_align = DMAENGINE_ALIGN_8_BYTES;
dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
platform_set_drvdata(pdev, tdev);
ret = dma_async_device_register(&tdev->device);
if (ret) {
dev_err(tdev->device.dev, "unable to register\n");
return ret;
}
if (pdev->dev.of_node) {
ret = of_dma_controller_register(pdev->dev.of_node,
mmp_tdma_xlate, tdev);
if (ret) {
dev_err(tdev->device.dev,
"failed to register controller\n");
dma_async_device_unregister(&tdev->device);
}
}
dev_info(tdev->device.dev, "initialized\n");
return 0;
}
static struct dma_chan *dw_dma_of_xlate(struct of_phandle_args *dma_spec,
struct of_dma *ofdma)
{
struct dw_dma *dw = ofdma->of_dma_data;
struct dw_dma_slave slave = {
.dma_dev = dw->dma.dev,
};
dma_cap_mask_t cap;
if (dma_spec->args_count != 3)
return NULL;
slave.src_id = dma_spec->args[0];
slave.dst_id = dma_spec->args[0];
slave.m_master = dma_spec->args[1];
slave.p_master = dma_spec->args[2];
if (WARN_ON(slave.src_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.dst_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.m_master >= dw->pdata->nr_masters ||
slave.p_master >= dw->pdata->nr_masters))
return NULL;
dma_cap_zero(cap);
dma_cap_set(DMA_SLAVE, cap);
/* TODO: there should be a simpler way to do this */
return dma_request_channel(cap, dw_dma_filter, &slave);
}
#ifdef CONFIG_ACPI
static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param)
{
struct acpi_dma_spec *dma_spec = param;
struct dw_dma_slave slave = {
.dma_dev = dma_spec->dev,
.src_id = dma_spec->slave_id,
.dst_id = dma_spec->slave_id,
.m_master = 0,
.p_master = 1,
};
return dw_dma_filter(chan, &slave);
}
static void dw_dma_acpi_controller_register(struct dw_dma *dw)
{
struct device *dev = dw->dma.dev;
struct acpi_dma_filter_info *info;
int ret;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return;
dma_cap_zero(info->dma_cap);
dma_cap_set(DMA_SLAVE, info->dma_cap);
info->filter_fn = dw_dma_acpi_filter;
ret = devm_acpi_dma_controller_register(dev, acpi_dma_simple_xlate,
info);
if (ret)
dev_err(dev, "could not register acpi_dma_controller\n");
}
#else /* !CONFIG_ACPI */
static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {}
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_OF
static struct dw_dma_platform_data *
dw_dma_parse_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct dw_dma_platform_data *pdata;
u32 tmp, arr[DW_DMA_MAX_NR_MASTERS], mb[DW_DMA_MAX_NR_CHANNELS];
u32 nr_masters;
u32 nr_channels;
if (!np) {
dev_err(&pdev->dev, "Missing DT data\n");
return NULL;
}
if (of_property_read_u32(np, "dma-masters", &nr_masters))
return NULL;
if (nr_masters < 1 || nr_masters > DW_DMA_MAX_NR_MASTERS)
return NULL;
if (of_property_read_u32(np, "dma-channels", &nr_channels))
return NULL;
if (nr_channels > DW_DMA_MAX_NR_CHANNELS)
return NULL;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
pdata->nr_masters = nr_masters;
pdata->nr_channels = nr_channels;
if (of_property_read_bool(np, "is_private"))
pdata->is_private = true;
/*
* All known devices, which use DT for configuration, support
* memory-to-memory transfers. So enable it by default.
*/
pdata->is_memcpy = true;
if (!of_property_read_u32(np, "chan_allocation_order", &tmp))
pdata->chan_allocation_order = (unsigned char)tmp;
if (!of_property_read_u32(np, "chan_priority", &tmp))
pdata->chan_priority = tmp;
if (!of_property_read_u32(np, "block_size", &tmp))
pdata->block_size = tmp;
if (!of_property_read_u32_array(np, "data-width", arr, nr_masters)) {
for (tmp = 0; tmp < nr_masters; tmp++)
pdata->data_width[tmp] = arr[tmp];
} else if (!of_property_read_u32_array(np, "data_width", arr, nr_masters)) {
for (tmp = 0; tmp < nr_masters; tmp++)
pdata->data_width[tmp] = BIT(arr[tmp] & 0x07);
}
if (!of_property_read_u32_array(np, "multi-block", mb, nr_channels)) {
for (tmp = 0; tmp < nr_channels; tmp++)
pdata->multi_block[tmp] = mb[tmp];
} else {
for (tmp = 0; tmp < nr_channels; tmp++)
pdata->multi_block[tmp] = 1;
}
return pdata;
}
#else
static inline struct dw_dma_platform_data *
dw_dma_parse_dt(struct platform_device *pdev)
{
return NULL;
}
#endif
static int dw_probe(struct platform_device *pdev)
{
struct dw_dma_chip *chip;
struct device *dev = &pdev->dev;
struct resource *mem;
const struct dw_dma_platform_data *pdata;
int err;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->irq = platform_get_irq(pdev, 0);
if (chip->irq < 0)
return chip->irq;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
chip->regs = devm_ioremap_resource(dev, mem);
if (IS_ERR(chip->regs))
return PTR_ERR(chip->regs);
err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
pdata = dev_get_platdata(dev);
if (!pdata)
pdata = dw_dma_parse_dt(pdev);
chip->dev = dev;
chip->pdata = pdata;
chip->clk = devm_clk_get(chip->dev, "hclk");
if (IS_ERR(chip->clk))
return PTR_ERR(chip->clk);
err = clk_prepare_enable(chip->clk);
if (err)
return err;
pm_runtime_enable(&pdev->dev);
err = dw_dma_probe(chip);
if (err)
goto err_dw_dma_probe;
platform_set_drvdata(pdev, chip);
if (pdev->dev.of_node) {
err = of_dma_controller_register(pdev->dev.of_node,
dw_dma_of_xlate, chip->dw);
if (err)
dev_err(&pdev->dev,
"could not register of_dma_controller\n");
}
if (ACPI_HANDLE(&pdev->dev))
dw_dma_acpi_controller_register(chip->dw);
return 0;
err_dw_dma_probe:
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(chip->clk);
return err;
}
static int dw_remove(struct platform_device *pdev)
{
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
if (pdev->dev.of_node)
of_dma_controller_free(pdev->dev.of_node);
dw_dma_remove(chip);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(chip->clk);
return 0;
}
static void dw_shutdown(struct platform_device *pdev)
{
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
/*
* We have to call dw_dma_disable() to stop any ongoing transfer. On
* some platforms we can't do that since DMA device is powered off.
* Moreover we have no possibility to check if the platform is affected
* or not. That's why we call pm_runtime_get_sync() / pm_runtime_put()
* unconditionally. On the other hand we can't use
* pm_runtime_suspended() because runtime PM framework is not fully
* used by the driver.
*/
pm_runtime_get_sync(chip->dev);
dw_dma_disable(chip);
pm_runtime_put_sync_suspend(chip->dev);
clk_disable_unprepare(chip->clk);
}
#ifdef CONFIG_OF
static const struct of_device_id dw_dma_of_id_table[] = {
{ .compatible = "snps,dma-spear1340" },
{}
};
static void sh_mmcif_request_dma(struct sh_mmcif_host *host,
struct sh_mmcif_plat_data *pdata)
{
struct resource *res = platform_get_resource(host->pd, IORESOURCE_MEM, 0);
struct dma_slave_config cfg;
dma_cap_mask_t mask;
int ret;
host->dma_active = false;
if (pdata) {
if (pdata->slave_id_tx <= 0 || pdata->slave_id_rx <= 0)
return;
} else if (!host->pd->dev.of_node) {
return;
}
/* We can only either use DMA for both Tx and Rx or not use it at all */
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
host->chan_tx = dma_request_slave_channel_compat(mask, shdma_chan_filter,
pdata ? (void *)pdata->slave_id_tx : NULL,
&host->pd->dev, "tx");
dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
host->chan_tx);
if (!host->chan_tx)
return;
/* In the OF case the driver will get the slave ID from the DT */
if (pdata)
cfg.slave_id = pdata->slave_id_tx;
cfg.direction = DMA_MEM_TO_DEV;
cfg.dst_addr = res->start + MMCIF_CE_DATA;
cfg.src_addr = 0;
ret = dmaengine_slave_config(host->chan_tx, &cfg);
if (ret < 0)
goto ecfgtx;
host->chan_rx = dma_request_slave_channel_compat(mask, shdma_chan_filter,
pdata ? (void *)pdata->slave_id_rx : NULL,
&host->pd->dev, "rx");
dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
host->chan_rx);
if (!host->chan_rx)
goto erqrx;
if (pdata)
cfg.slave_id = pdata->slave_id_rx;
cfg.direction = DMA_DEV_TO_MEM;
cfg.dst_addr = 0;
cfg.src_addr = res->start + MMCIF_CE_DATA;
ret = dmaengine_slave_config(host->chan_rx, &cfg);
if (ret < 0)
goto ecfgrx;
return;
ecfgrx:
dma_release_channel(host->chan_rx);
host->chan_rx = NULL;
erqrx:
ecfgtx:
dma_release_channel(host->chan_tx);
host->chan_tx = NULL;
}
static int ux500_dma_controller_start(struct dma_controller *c)
{
struct ux500_dma_controller *controller = container_of(c,
struct ux500_dma_controller, controller);
struct ux500_dma_channel *ux500_channel = NULL;
struct musb *musb = controller->private_data;
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *plat = dev->platform_data;
struct ux500_musb_board_data *data = plat->board_data;
struct dma_channel *dma_channel = NULL;
u32 ch_num;
u8 dir;
u8 is_tx = 0;
void **param_array;
struct ux500_dma_channel *channel_array;
u32 ch_count;
dma_cap_mask_t mask;
if ((data->num_rx_channels > UX500_MUSB_DMA_NUM_RX_CHANNELS) ||
(data->num_tx_channels > UX500_MUSB_DMA_NUM_TX_CHANNELS))
return -EINVAL;
controller->num_rx_channels = data->num_rx_channels;
controller->num_tx_channels = data->num_tx_channels;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
channel_array = controller->rx_channel;
ch_count = data->num_rx_channels;
param_array = data->dma_rx_param_array;
for (dir = 0; dir < 2; dir++) {
for (ch_num = 0; ch_num < ch_count; ch_num++) {
ux500_channel = &channel_array[ch_num];
ux500_channel->controller = controller;
ux500_channel->ch_num = ch_num;
ux500_channel->is_tx = is_tx;
dma_channel = &(ux500_channel->channel);
dma_channel->private_data = ux500_channel;
dma_channel->status = MUSB_DMA_STATUS_FREE;
dma_channel->max_len = SZ_16M;
ux500_channel->dma_chan = dma_request_channel(mask,
data->dma_filter,
param_array[ch_num]);
if (!ux500_channel->dma_chan) {
ERR("Dma pipe allocation error dir=%d ch=%d\n",
dir, ch_num);
ux500_dma_controller_stop(c);
return -EBUSY;
}
}
channel_array = controller->tx_channel;
ch_count = data->num_tx_channels;
param_array = data->dma_tx_param_array;
is_tx = 1;
}
return 0;
}
static int __init sdma_probe(struct platform_device *pdev)
{
int ret;
int irq;
struct resource *iores;
struct sdma_platform_data *pdata = pdev->dev.platform_data;
int i;
struct sdma_engine *sdma;
sdma = kzalloc(sizeof(*sdma), GFP_KERNEL);
if (!sdma)
return -ENOMEM;
sdma->dev = &pdev->dev;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!iores || irq < 0 || !pdata) {
ret = -EINVAL;
goto err_irq;
}
if (!request_mem_region(iores->start, resource_size(iores), pdev->name)) {
ret = -EBUSY;
goto err_request_region;
}
sdma->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(sdma->clk)) {
ret = PTR_ERR(sdma->clk);
goto err_clk;
}
sdma->regs = ioremap(iores->start, resource_size(iores));
if (!sdma->regs) {
ret = -ENOMEM;
goto err_ioremap;
}
ret = request_irq(irq, sdma_int_handler, 0, "sdma", sdma);
if (ret)
goto err_request_irq;
sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
if (!sdma->script_addrs)
goto err_alloc;
sdma->version = pdata->sdma_version;
dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);
INIT_LIST_HEAD(&sdma->dma_device.channels);
/* Initialize channel parameters */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct sdma_channel *sdmac = &sdma->channel[i];
sdmac->sdma = sdma;
spin_lock_init(&sdmac->lock);
sdmac->chan.device = &sdma->dma_device;
sdmac->channel = i;
/*
* Add the channel to the DMAC list. Do not add channel 0 though
* because we need it internally in the SDMA driver. This also means
* that channel 0 in dmaengine counting matches sdma channel 1.
*/
if (i)
list_add_tail(&sdmac->chan.device_node,
&sdma->dma_device.channels);
}
ret = sdma_init(sdma);
if (ret)
goto err_init;
if (pdata->script_addrs)
sdma_add_scripts(sdma, pdata->script_addrs);
sdma_get_firmware(sdma, pdata->cpu_name, pdata->to_version);
sdma->dma_device.dev = &pdev->dev;
sdma->dma_device.device_alloc_chan_resources = sdma_alloc_chan_resources;
sdma->dma_device.device_free_chan_resources = sdma_free_chan_resources;
sdma->dma_device.device_tx_status = sdma_tx_status;
sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg;
sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic;
sdma->dma_device.device_control = sdma_control;
sdma->dma_device.device_issue_pending = sdma_issue_pending;
sdma->dma_device.dev->dma_parms = &sdma->dma_parms;
dma_set_max_seg_size(sdma->dma_device.dev, 65535);
ret = dma_async_device_register(&sdma->dma_device);
if (ret) {
dev_err(&pdev->dev, "unable to register\n");
goto err_init;
}
dev_info(sdma->dev, "initialized\n");
return 0;
err_init:
kfree(sdma->script_addrs);
err_alloc:
free_irq(irq, sdma);
err_request_irq:
iounmap(sdma->regs);
err_ioremap:
clk_put(sdma->clk);
err_clk:
release_mem_region(iores->start, resource_size(iores));
err_request_region:
err_irq:
kfree(sdma);
return ret;
}
static int __devinit mmp_tdma_probe(struct platform_device *pdev)
{
const struct platform_device_id *id = platform_get_device_id(pdev);
enum mmp_tdma_type type = id->driver_data;
struct mmp_tdma_device *tdev;
struct resource *iores;
int i, ret;
int irq = 0;
int chan_num = TDMA_CHANNEL_NUM;
/* always have couple channels */
tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL);
if (!tdev)
return -ENOMEM;
tdev->dev = &pdev->dev;
iores = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!iores)
return -EINVAL;
if (resource_size(iores) != chan_num)
tdev->irq = iores->start;
else
irq = iores->start;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iores)
return -EINVAL;
tdev->base = devm_request_and_ioremap(&pdev->dev, iores);
if (!tdev->base)
return -EADDRNOTAVAIL;
dma_cap_set(DMA_SLAVE, tdev->device.cap_mask);
dma_cap_set(DMA_CYCLIC, tdev->device.cap_mask);
INIT_LIST_HEAD(&tdev->device.channels);
/* initialize channel parameters */
for (i = 0; i < chan_num; i++) {
ret = mmp_tdma_chan_init(tdev, i, irq, type);
if (ret)
return ret;
}
if (tdev->irq) {
ret = devm_request_irq(&pdev->dev, tdev->irq,
mmp_tdma_int_handler, IRQF_DISABLED, "tdma", tdev);
if (ret)
return ret;
}
tdev->device.dev = &pdev->dev;
tdev->device.device_alloc_chan_resources =
mmp_tdma_alloc_chan_resources;
tdev->device.device_free_chan_resources =
mmp_tdma_free_chan_resources;
tdev->device.device_prep_dma_cyclic = mmp_tdma_prep_dma_cyclic;
tdev->device.device_tx_status = mmp_tdma_tx_status;
tdev->device.device_issue_pending = mmp_tdma_issue_pending;
tdev->device.device_control = mmp_tdma_control;
tdev->device.copy_align = TDMA_ALIGNMENT;
dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
platform_set_drvdata(pdev, tdev);
ret = dma_async_device_register(&tdev->device);
if (ret) {
dev_err(tdev->device.dev, "unable to register\n");
return ret;
}
dev_info(tdev->device.dev, "initialized\n");
return 0;
}
static int __devinit mmc_omap_probe(struct platform_device *pdev)
{
struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
struct mmc_omap_host *host = NULL;
struct resource *res;
dma_cap_mask_t mask;
unsigned sig;
int i, ret = 0;
int irq;
if (pdata == NULL) {
dev_err(&pdev->dev, "platform data missing\n");
return -ENXIO;
}
if (pdata->nr_slots == 0) {
dev_err(&pdev->dev, "no slots\n");
return -ENXIO;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (res == NULL || irq < 0)
return -ENXIO;
res = request_mem_region(res->start, resource_size(res),
pdev->name);
if (res == NULL)
return -EBUSY;
host = kzalloc(sizeof(struct mmc_omap_host), GFP_KERNEL);
if (host == NULL) {
ret = -ENOMEM;
goto err_free_mem_region;
}
INIT_WORK(&host->slot_release_work, mmc_omap_slot_release_work);
INIT_WORK(&host->send_stop_work, mmc_omap_send_stop_work);
INIT_WORK(&host->cmd_abort_work, mmc_omap_abort_command);
setup_timer(&host->cmd_abort_timer, mmc_omap_cmd_timer,
(unsigned long) host);
spin_lock_init(&host->clk_lock);
setup_timer(&host->clk_timer, mmc_omap_clk_timer, (unsigned long) host);
spin_lock_init(&host->dma_lock);
spin_lock_init(&host->slot_lock);
init_waitqueue_head(&host->slot_wq);
host->pdata = pdata;
host->dev = &pdev->dev;
platform_set_drvdata(pdev, host);
host->id = pdev->id;
host->mem_res = res;
host->irq = irq;
host->use_dma = 1;
host->irq = irq;
host->phys_base = host->mem_res->start;
host->virt_base = ioremap(res->start, resource_size(res));
if (!host->virt_base)
goto err_ioremap;
host->iclk = clk_get(&pdev->dev, "ick");
if (IS_ERR(host->iclk)) {
ret = PTR_ERR(host->iclk);
goto err_free_mmc_host;
}
clk_enable(host->iclk);
host->fclk = clk_get(&pdev->dev, "fck");
if (IS_ERR(host->fclk)) {
ret = PTR_ERR(host->fclk);
goto err_free_iclk;
}
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
host->dma_tx_burst = -1;
host->dma_rx_burst = -1;
if (cpu_is_omap24xx())
sig = host->id == 0 ? OMAP24XX_DMA_MMC1_TX : OMAP24XX_DMA_MMC2_TX;
else
sig = host->id == 0 ? OMAP_DMA_MMC_TX : OMAP_DMA_MMC2_TX;
host->dma_tx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
#if 0
if (!host->dma_tx) {
dev_err(host->dev, "unable to obtain TX DMA engine channel %u\n",
sig);
goto err_dma;
}
#else
if (!host->dma_tx)
dev_warn(host->dev, "unable to obtain TX DMA engine channel %u\n",
sig);
#endif
if (cpu_is_omap24xx())
sig = host->id == 0 ? OMAP24XX_DMA_MMC1_RX : OMAP24XX_DMA_MMC2_RX;
else
sig = host->id == 0 ? OMAP_DMA_MMC_RX : OMAP_DMA_MMC2_RX;
host->dma_rx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
#if 0
if (!host->dma_rx) {
dev_err(host->dev, "unable to obtain RX DMA engine channel %u\n",
sig);
goto err_dma;
}
#else
if (!host->dma_rx)
dev_warn(host->dev, "unable to obtain RX DMA engine channel %u\n",
sig);
#endif
ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
if (ret)
goto err_free_dma;
if (pdata->init != NULL) {
ret = pdata->init(&pdev->dev);
if (ret < 0)
goto err_free_irq;
}
host->nr_slots = pdata->nr_slots;
host->reg_shift = (cpu_is_omap7xx() ? 1 : 2);
host->mmc_omap_wq = alloc_workqueue("mmc_omap", 0, 0);
if (!host->mmc_omap_wq)
goto err_plat_cleanup;
for (i = 0; i < pdata->nr_slots; i++) {
ret = mmc_omap_new_slot(host, i);
if (ret < 0) {
while (--i >= 0)
mmc_omap_remove_slot(host->slots[i]);
goto err_destroy_wq;
}
}
return 0;
err_destroy_wq:
destroy_workqueue(host->mmc_omap_wq);
err_plat_cleanup:
if (pdata->cleanup)
pdata->cleanup(&pdev->dev);
err_free_irq:
free_irq(host->irq, host);
err_free_dma:
if (host->dma_tx)
dma_release_channel(host->dma_tx);
if (host->dma_rx)
dma_release_channel(host->dma_rx);
clk_put(host->fclk);
err_free_iclk:
clk_disable(host->iclk);
clk_put(host->iclk);
err_free_mmc_host:
iounmap(host->virt_base);
err_ioremap:
kfree(host);
err_free_mem_region:
release_mem_region(res->start, resource_size(res));
return ret;
}
static int __init iop3xx_adma_cap_init(void)
{
#ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */
dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
#else
dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
#endif
#ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */
dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
#else
dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
#endif
#ifdef CONFIG_ARCH_IOP32X /* the 32x AAU does not perform zero sum */
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#else
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_XOR_VAL, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#endif
return 0;
}
static int pxa_ata_probe(struct platform_device *pdev)
{
struct ata_host *host;
struct ata_port *ap;
struct pata_pxa_data *data;
struct resource *cmd_res;
struct resource *ctl_res;
struct resource *dma_res;
struct resource *irq_res;
struct pata_pxa_pdata *pdata = dev_get_platdata(&pdev->dev);
struct dma_slave_config config;
dma_cap_mask_t mask;
struct pxad_param param;
int ret = 0;
/*
* Resource validation, three resources are needed:
* - CMD port base address
* - CTL port base address
* - DMA port base address
* - IRQ pin
*/
if (pdev->num_resources != 4) {
dev_err(&pdev->dev, "invalid number of resources\n");
return -EINVAL;
}
/*
* CMD port base address
*/
cmd_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (unlikely(cmd_res == NULL))
return -EINVAL;
/*
* CTL port base address
*/
ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (unlikely(ctl_res == NULL))
return -EINVAL;
/*
* DMA port base address
*/
dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (unlikely(dma_res == NULL))
return -EINVAL;
/*
* IRQ pin
*/
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (unlikely(irq_res == NULL))
return -EINVAL;
/*
* Allocate the host
*/
host = ata_host_alloc(&pdev->dev, 1);
if (!host)
return -ENOMEM;
ap = host->ports[0];
ap->ops = &pxa_ata_port_ops;
ap->pio_mask = ATA_PIO4;
ap->mwdma_mask = ATA_MWDMA2;
ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, cmd_res->start,
resource_size(cmd_res));
ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
resource_size(ctl_res));
ap->ioaddr.bmdma_addr = devm_ioremap(&pdev->dev, dma_res->start,
resource_size(dma_res));
/*
* Adjust register offsets
*/
ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
ap->ioaddr.data_addr = ap->ioaddr.cmd_addr +
(ATA_REG_DATA << pdata->reg_shift);
ap->ioaddr.error_addr = ap->ioaddr.cmd_addr +
(ATA_REG_ERR << pdata->reg_shift);
ap->ioaddr.feature_addr = ap->ioaddr.cmd_addr +
(ATA_REG_FEATURE << pdata->reg_shift);
ap->ioaddr.nsect_addr = ap->ioaddr.cmd_addr +
(ATA_REG_NSECT << pdata->reg_shift);
ap->ioaddr.lbal_addr = ap->ioaddr.cmd_addr +
(ATA_REG_LBAL << pdata->reg_shift);
ap->ioaddr.lbam_addr = ap->ioaddr.cmd_addr +
(ATA_REG_LBAM << pdata->reg_shift);
ap->ioaddr.lbah_addr = ap->ioaddr.cmd_addr +
(ATA_REG_LBAH << pdata->reg_shift);
ap->ioaddr.device_addr = ap->ioaddr.cmd_addr +
(ATA_REG_DEVICE << pdata->reg_shift);
ap->ioaddr.status_addr = ap->ioaddr.cmd_addr +
(ATA_REG_STATUS << pdata->reg_shift);
ap->ioaddr.command_addr = ap->ioaddr.cmd_addr +
(ATA_REG_CMD << pdata->reg_shift);
/*
* Allocate and load driver's internal data structure
*/
data = devm_kzalloc(&pdev->dev, sizeof(struct pata_pxa_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
ap->private_data = data;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
param.prio = PXAD_PRIO_LOWEST;
param.drcmr = pdata->dma_dreq;
memset(&config, 0, sizeof(config));
config.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
config.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
config.src_addr = dma_res->start;
config.dst_addr = dma_res->start;
config.src_maxburst = 32;
config.dst_maxburst = 32;
/*
* Request the DMA channel
*/
data->dma_chan =
dma_request_slave_channel_compat(mask, pxad_filter_fn,
¶m, &pdev->dev, "data");
if (!data->dma_chan)
return -EBUSY;
ret = dmaengine_slave_config(data->dma_chan, &config);
if (ret < 0) {
dev_err(&pdev->dev, "dma configuration failed: %d\n", ret);
return ret;
}
/*
* Activate the ATA host
*/
ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
pdata->irq_flags, &pxa_ata_sht);
if (ret)
dma_release_channel(data->dma_chan);
return ret;
}
static int mmc_omap_probe(struct platform_device *pdev)
{
struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
struct mmc_omap_host *host = NULL;
struct resource *res;
dma_cap_mask_t mask;
unsigned sig = 0;
int i, ret = 0;
int irq;
if (pdata == NULL) {
dev_err(&pdev->dev, "platform data missing\n");
return -ENXIO;
}
if (pdata->nr_slots == 0) {
dev_err(&pdev->dev, "no slots\n");
return -EPROBE_DEFER;
}
host = devm_kzalloc(&pdev->dev, sizeof(struct mmc_omap_host),
GFP_KERNEL);
if (host == NULL)
return -ENOMEM;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -ENXIO;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
host->virt_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(host->virt_base))
return PTR_ERR(host->virt_base);
INIT_WORK(&host->slot_release_work, mmc_omap_slot_release_work);
INIT_WORK(&host->send_stop_work, mmc_omap_send_stop_work);
INIT_WORK(&host->cmd_abort_work, mmc_omap_abort_command);
setup_timer(&host->cmd_abort_timer, mmc_omap_cmd_timer,
(unsigned long) host);
spin_lock_init(&host->clk_lock);
setup_timer(&host->clk_timer, mmc_omap_clk_timer, (unsigned long) host);
spin_lock_init(&host->dma_lock);
spin_lock_init(&host->slot_lock);
init_waitqueue_head(&host->slot_wq);
host->pdata = pdata;
host->features = host->pdata->slots[0].features;
host->dev = &pdev->dev;
platform_set_drvdata(pdev, host);
host->id = pdev->id;
host->irq = irq;
host->phys_base = res->start;
host->iclk = clk_get(&pdev->dev, "ick");
if (IS_ERR(host->iclk))
return PTR_ERR(host->iclk);
clk_enable(host->iclk);
host->fclk = clk_get(&pdev->dev, "fck");
if (IS_ERR(host->fclk)) {
ret = PTR_ERR(host->fclk);
goto err_free_iclk;
}
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
host->dma_tx_burst = -1;
host->dma_rx_burst = -1;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
if (res)
sig = res->start;
host->dma_tx = dma_request_slave_channel_compat(mask,
omap_dma_filter_fn, &sig, &pdev->dev, "tx");
if (!host->dma_tx)
dev_warn(host->dev, "unable to obtain TX DMA engine channel %u\n",
sig);
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
if (res)
sig = res->start;
host->dma_rx = dma_request_slave_channel_compat(mask,
omap_dma_filter_fn, &sig, &pdev->dev, "rx");
if (!host->dma_rx)
dev_warn(host->dev, "unable to obtain RX DMA engine channel %u\n",
sig);
ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
if (ret)
goto err_free_dma;
if (pdata->init != NULL) {
ret = pdata->init(&pdev->dev);
if (ret < 0)
goto err_free_irq;
}
host->nr_slots = pdata->nr_slots;
host->reg_shift = (mmc_omap7xx() ? 1 : 2);
host->mmc_omap_wq = alloc_workqueue("mmc_omap", 0, 0);
if (!host->mmc_omap_wq)
goto err_plat_cleanup;
for (i = 0; i < pdata->nr_slots; i++) {
ret = mmc_omap_new_slot(host, i);
if (ret < 0) {
while (--i >= 0)
mmc_omap_remove_slot(host->slots[i]);
goto err_destroy_wq;
}
}
return 0;
err_destroy_wq:
destroy_workqueue(host->mmc_omap_wq);
err_plat_cleanup:
if (pdata->cleanup)
pdata->cleanup(&pdev->dev);
err_free_irq:
free_irq(host->irq, host);
err_free_dma:
if (host->dma_tx)
dma_release_channel(host->dma_tx);
if (host->dma_rx)
dma_release_channel(host->dma_rx);
clk_put(host->fclk);
err_free_iclk:
clk_disable(host->iclk);
clk_put(host->iclk);
return ret;
}
static int tegra_uart_dma_channel_allocate(struct tegra_uart_port *tup,
bool dma_to_memory)
{
struct dma_chan *dma_chan;
unsigned char *dma_buf;
dma_addr_t dma_phys;
int ret;
struct dma_slave_config dma_sconfig;
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dma_chan = dma_request_channel(mask, NULL, NULL);
if (!dma_chan) {
dev_err(tup->uport.dev,
"Dma channel is not available, will try later\n");
return -EPROBE_DEFER;
}
if (dma_to_memory) {
dma_buf = dma_alloc_coherent(tup->uport.dev,
TEGRA_UART_RX_DMA_BUFFER_SIZE,
&dma_phys, GFP_KERNEL);
if (!dma_buf) {
dev_err(tup->uport.dev,
"Not able to allocate the dma buffer\n");
dma_release_channel(dma_chan);
return -ENOMEM;
}
} else {
dma_phys = dma_map_single(tup->uport.dev,
tup->uport.state->xmit.buf, UART_XMIT_SIZE,
DMA_TO_DEVICE);
dma_buf = tup->uport.state->xmit.buf;
}
dma_sconfig.slave_id = tup->dma_req_sel;
if (dma_to_memory) {
dma_sconfig.src_addr = tup->uport.mapbase;
dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma_sconfig.src_maxburst = 4;
} else {
dma_sconfig.dst_addr = tup->uport.mapbase;
dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma_sconfig.dst_maxburst = 16;
}
ret = dmaengine_slave_config(dma_chan, &dma_sconfig);
if (ret < 0) {
dev_err(tup->uport.dev,
"Dma slave config failed, err = %d\n", ret);
goto scrub;
}
if (dma_to_memory) {
tup->rx_dma_chan = dma_chan;
tup->rx_dma_buf_virt = dma_buf;
tup->rx_dma_buf_phys = dma_phys;
} else {
tup->tx_dma_chan = dma_chan;
tup->tx_dma_buf_virt = dma_buf;
tup->tx_dma_buf_phys = dma_phys;
}
return 0;
scrub:
dma_release_channel(dma_chan);
return ret;
}
static void pxa_uart_dma_init(struct uart_pxa_port *up)
{
struct uart_pxa_dma *pxa_dma = &up->uart_dma;
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
if (NULL == pxa_dma->rxdma_chan) {
pxa_dma->rxdma_chan = dma_request_slave_channel(up->port.dev,
"rx");
if (NULL == pxa_dma->rxdma_chan)
goto out;
}
if (NULL == pxa_dma->txdma_chan) {
pxa_dma->txdma_chan = dma_request_slave_channel(up->port.dev,
"tx");
if (NULL == pxa_dma->txdma_chan)
goto err_txdma;
}
if (NULL == pxa_dma->txdma_addr) {
pxa_dma->txdma_addr = dma_alloc_coherent(up->port.dev,
DMA_BLOCK, &pxa_dma->txdma_addr_phys, GFP_KERNEL);
if (!pxa_dma->txdma_addr)
goto txdma_err_alloc;
}
if (NULL == pxa_dma->rxdma_addr) {
pxa_dma->rxdma_addr = dma_alloc_coherent(up->port.dev,
DMA_BLOCK, &pxa_dma->rxdma_addr_phys, GFP_KERNEL);
if (!pxa_dma->rxdma_addr)
goto rxdma_err_alloc;
}
#ifdef CONFIG_PM
pxa_dma->tx_buf_save = kmalloc(DMA_BLOCK, GFP_KERNEL);
if (!pxa_dma->tx_buf_save)
goto buf_err_alloc;
#endif
pxa_dma->dma_status = 0;
return;
#ifdef CONFIG_PM
buf_err_alloc:
dma_free_coherent(up->port.dev, DMA_BLOCK, pxa_dma->rxdma_addr,
pxa_dma->rxdma_addr_phys);
pxa_dma->rxdma_addr = NULL;
#endif
rxdma_err_alloc:
dma_free_coherent(up->port.dev, DMA_BLOCK, pxa_dma->txdma_addr,
pxa_dma->txdma_addr_phys);
pxa_dma->txdma_addr = NULL;
txdma_err_alloc:
dma_release_channel(pxa_dma->txdma_chan);
pxa_dma->txdma_chan = NULL;
err_txdma:
dma_release_channel(pxa_dma->rxdma_chan);
pxa_dma->rxdma_chan = NULL;
out:
return;
}
int serial8250_request_dma(struct uart_8250_port *p)
{
struct uart_8250_dma *dma = p->dma;
dma_cap_mask_t mask;
/* Default slave configuration parameters */
dma->rxconf.direction = DMA_DEV_TO_MEM;
dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma->rxconf.src_addr = p->port.mapbase + UART_RX;
dma->txconf.direction = DMA_MEM_TO_DEV;
dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma->txconf.dst_addr = p->port.mapbase + UART_TX;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
/* Get a channel for RX */
dma->rxchan = dma_request_slave_channel_compat(mask,
dma->fn, dma->rx_param,
p->port.dev, "rx");
if (!dma->rxchan)
return -ENODEV;
dmaengine_slave_config(dma->rxchan, &dma->rxconf);
/* Get a channel for TX */
dma->txchan = dma_request_slave_channel_compat(mask,
dma->fn, dma->tx_param,
p->port.dev, "tx");
if (!dma->txchan) {
dma_release_channel(dma->rxchan);
return -ENODEV;
}
dmaengine_slave_config(dma->txchan, &dma->txconf);
/* RX buffer */
if (!dma->rx_size)
dma->rx_size = PAGE_SIZE;
dma->rx_buf = dma_alloc_coherent(dma->rxchan->device->dev, dma->rx_size,
&dma->rx_addr, GFP_KERNEL);
if (!dma->rx_buf)
goto err;
/* TX buffer */
dma->tx_addr = dma_map_single(dma->txchan->device->dev,
p->port.state->xmit.buf,
UART_XMIT_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dma->txchan->device->dev, dma->tx_addr)) {
dma_free_coherent(dma->rxchan->device->dev, dma->rx_size,
dma->rx_buf, dma->rx_addr);
goto err;
}
dev_dbg_ratelimited(p->port.dev, "got both dma channels\n");
return 0;
err:
dma_release_channel(dma->rxchan);
dma_release_channel(dma->txchan);
return -ENOMEM;
}
static int __init iop3xx_adma_cap_init(void)
{
#ifdef CONFIG_ARCH_IOP32X
dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
#else
dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask);
#endif
#ifdef CONFIG_ARCH_IOP32X
dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
#else
dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask);
#endif
#ifdef CONFIG_ARCH_IOP32X
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#else
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_XOR_VAL, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#endif
return 0;
}
static int tegra_adma_probe(struct platform_device *pdev)
{
const struct tegra_adma_chip_data *cdata;
struct tegra_adma *tdma;
struct resource *res;
struct clk *clk;
int ret, i;
cdata = of_device_get_match_data(&pdev->dev);
if (!cdata) {
dev_err(&pdev->dev, "device match data not found\n");
return -ENODEV;
}
tdma = devm_kzalloc(&pdev->dev, sizeof(*tdma) + cdata->nr_channels *
sizeof(struct tegra_adma_chan), GFP_KERNEL);
if (!tdma)
return -ENOMEM;
tdma->dev = &pdev->dev;
tdma->nr_channels = cdata->nr_channels;
platform_set_drvdata(pdev, tdma);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
tdma->base_addr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(tdma->base_addr))
return PTR_ERR(tdma->base_addr);
ret = pm_clk_create(&pdev->dev);
if (ret)
return ret;
clk = clk_get(&pdev->dev, "d_audio");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "ADMA clock not found\n");
ret = PTR_ERR(clk);
goto clk_destroy;
}
ret = pm_clk_add_clk(&pdev->dev, clk);
if (ret) {
clk_put(clk);
goto clk_destroy;
}
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0)
goto rpm_disable;
ret = tegra_adma_init(tdma);
if (ret)
goto rpm_put;
INIT_LIST_HEAD(&tdma->dma_dev.channels);
for (i = 0; i < tdma->nr_channels; i++) {
struct tegra_adma_chan *tdc = &tdma->channels[i];
tdc->chan_addr = tdma->base_addr + ADMA_CH_REG_OFFSET(i);
tdc->irq = of_irq_get(pdev->dev.of_node, i);
if (tdc->irq < 0) {
ret = tdc->irq;
goto irq_dispose;
}
vchan_init(&tdc->vc, &tdma->dma_dev);
tdc->vc.desc_free = tegra_adma_desc_free;
tdc->tdma = tdma;
}
dma_cap_set(DMA_SLAVE, tdma->dma_dev.cap_mask);
dma_cap_set(DMA_PRIVATE, tdma->dma_dev.cap_mask);
dma_cap_set(DMA_CYCLIC, tdma->dma_dev.cap_mask);
tdma->dma_dev.dev = &pdev->dev;
tdma->dma_dev.device_alloc_chan_resources =
tegra_adma_alloc_chan_resources;
tdma->dma_dev.device_free_chan_resources =
tegra_adma_free_chan_resources;
tdma->dma_dev.device_issue_pending = tegra_adma_issue_pending;
tdma->dma_dev.device_prep_dma_cyclic = tegra_adma_prep_dma_cyclic;
tdma->dma_dev.device_config = tegra_adma_slave_config;
tdma->dma_dev.device_tx_status = tegra_adma_tx_status;
tdma->dma_dev.device_terminate_all = tegra_adma_terminate_all;
tdma->dma_dev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
tdma->dma_dev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
tdma->dma_dev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
tdma->dma_dev.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
ret = dma_async_device_register(&tdma->dma_dev);
if (ret < 0) {
dev_err(&pdev->dev, "ADMA registration failed: %d\n", ret);
goto irq_dispose;
}
ret = of_dma_controller_register(pdev->dev.of_node,
tegra_dma_of_xlate, tdma);
if (ret < 0) {
dev_err(&pdev->dev, "ADMA OF registration failed %d\n", ret);
goto dma_remove;
}
pm_runtime_put(&pdev->dev);
dev_info(&pdev->dev, "Tegra210 ADMA driver registered %d channels\n",
tdma->nr_channels);
return 0;
dma_remove:
dma_async_device_unregister(&tdma->dma_dev);
irq_dispose:
while (--i >= 0)
irq_dispose_mapping(tdma->channels[i].irq);
rpm_put:
pm_runtime_put_sync(&pdev->dev);
rpm_disable:
pm_runtime_disable(&pdev->dev);
clk_destroy:
pm_clk_destroy(&pdev->dev);
return ret;
}
static int __devinit rt_dma_probe(struct platform_device *pdev)
#endif
{
struct dma_device *dma_dev;
struct rt_dma_chan *rt_chan;
int err;
int ret;
#ifdef CONFIG_RT_DMA_HSDMA
unsigned long reg_int_mask=0;
#else
int reg;
#endif
//printk("%s\n",__FUNCTION__);
dma_dev = devm_kzalloc(&pdev->dev, sizeof(*dma_dev), GFP_KERNEL);
if (!dma_dev)
return -ENOMEM;
INIT_LIST_HEAD(&dma_dev->channels);
dma_cap_zero(dma_dev->cap_mask);
dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
//dma_cap_set(DMA_SLAVE, dma_dev->cap_mask);
dma_dev->device_alloc_chan_resources = rt_dma_alloc_chan_resources;
dma_dev->device_free_chan_resources = rt_dma_free_chan_resources;
dma_dev->device_tx_status = rt_dma_status;
dma_dev->device_issue_pending = rt_dma_issue_pending;
dma_dev->device_prep_dma_memcpy = rt_dma_prep_dma_memcpy;
dma_dev->dev = &pdev->dev;
rt_chan = devm_kzalloc(&pdev->dev, sizeof(*rt_chan), GFP_KERNEL);
if (!rt_chan) {
return -ENOMEM;
}
spin_lock_init(&rt_chan->lock);
INIT_LIST_HEAD(&rt_chan->chain);
INIT_LIST_HEAD(&rt_chan->completed_slots);
INIT_LIST_HEAD(&rt_chan->all_slots);
rt_chan->common.device = dma_dev;
rt_chan->txd.tx_submit = rt_dma_tx_submit;
list_add_tail(&rt_chan->common.device_node, &dma_dev->channels);
err = dma_async_device_register(dma_dev);
if (0 != err) {
pr_err("ERR_MDMA:device_register failed: %d\n", err);
return 1;
}
#ifdef CONFIG_RT_DMA_HSDMA
ret = request_irq(SURFBOARDINT_HSGDMA, rt_dma_interrupt_handler, IRQF_DISABLED, "HS_DMA", NULL);
#else
ret = request_irq(SURFBOARDINT_DMA, rt_dma_interrupt_handler, IRQF_DISABLED, "GDMA", NULL);
#endif
if(ret){
pr_err("IRQ %d is not free.\n", SURFBOARDINT_DMA);
return 1;
}
#ifdef CONFIG_RT_DMA_HSDMA
sysRegWrite(HSDMA_INT_MASK, reg_int_mask & ~(HSDMA_FE_INT_TX)); // disable int TX DONE
sysRegWrite(HSDMA_INT_MASK, reg_int_mask & ~(HSDMA_FE_INT_RX) ); // disable int RX DONE
printk("reg_int_mask=%lu, INT_MASK= %x \n", reg_int_mask, sysRegRead(HSDMA_INT_MASK));
HSDMA_init();
#else
//set GDMA register in advance.
reg = (32 << 16) | (32 << 8) | (MEMCPY_DMA_CH << 3);
RT_DMA_WRITE_REG(RT_DMA_CTRL_REG1(MEMCPY_DMA_CH), reg);
#endif
return 0;
}
static struct dma_chan *dw_dma_of_xlate(struct of_phandle_args *dma_spec,
struct of_dma *ofdma)
{
struct dw_dma *dw = ofdma->of_dma_data;
struct dw_dma_slave slave = {
.dma_dev = dw->dma.dev,
};
dma_cap_mask_t cap;
if (dma_spec->args_count != 3)
return NULL;
slave.src_id = dma_spec->args[0];
slave.dst_id = dma_spec->args[0];
slave.src_master = dma_spec->args[1];
slave.dst_master = dma_spec->args[2];
if (WARN_ON(slave.src_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.dst_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.src_master >= dw->nr_masters ||
slave.dst_master >= dw->nr_masters))
return NULL;
dma_cap_zero(cap);
dma_cap_set(DMA_SLAVE, cap);
/* TODO: there should be a simpler way to do this */
return dma_request_channel(cap, dw_dma_filter, &slave);
}
#ifdef CONFIG_ACPI
static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param)
{
struct acpi_dma_spec *dma_spec = param;
struct dw_dma_slave slave = {
.dma_dev = dma_spec->dev,
.src_id = dma_spec->slave_id,
.dst_id = dma_spec->slave_id,
.src_master = 1,
.dst_master = 0,
};
return dw_dma_filter(chan, &slave);
}
static void dw_dma_acpi_controller_register(struct dw_dma *dw)
{
struct device *dev = dw->dma.dev;
struct acpi_dma_filter_info *info;
int ret;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return;
dma_cap_zero(info->dma_cap);
dma_cap_set(DMA_SLAVE, info->dma_cap);
info->filter_fn = dw_dma_acpi_filter;
ret = devm_acpi_dma_controller_register(dev, acpi_dma_simple_xlate,
info);
if (ret)
dev_err(dev, "could not register acpi_dma_controller\n");
}
#else /* !CONFIG_ACPI */
static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {}
#endif /* !CONFIG_ACPI */
#ifdef CONFIG_OF
static struct dw_dma_platform_data *
dw_dma_parse_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct dw_dma_platform_data *pdata;
u32 tmp, arr[DW_DMA_MAX_NR_MASTERS];
if (!np) {
dev_err(&pdev->dev, "Missing DT data\n");
return NULL;
}
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
if (of_property_read_u32(np, "dma-channels", &pdata->nr_channels))
return NULL;
if (of_property_read_bool(np, "is_private"))
pdata->is_private = true;
if (!of_property_read_u32(np, "chan_allocation_order", &tmp))
pdata->chan_allocation_order = (unsigned char)tmp;
if (!of_property_read_u32(np, "chan_priority", &tmp))
pdata->chan_priority = tmp;
if (!of_property_read_u32(np, "block_size", &tmp))
pdata->block_size = tmp;
if (!of_property_read_u32(np, "dma-masters", &tmp)) {
if (tmp > DW_DMA_MAX_NR_MASTERS)
return NULL;
pdata->nr_masters = tmp;
}
if (!of_property_read_u32_array(np, "data_width", arr,
pdata->nr_masters))
for (tmp = 0; tmp < pdata->nr_masters; tmp++)
pdata->data_width[tmp] = arr[tmp];
return pdata;
}
#else
static inline struct dw_dma_platform_data *
dw_dma_parse_dt(struct platform_device *pdev)
{
return NULL;
}
#endif
static int dw_probe(struct platform_device *pdev)
{
struct dw_dma_chip *chip;
struct device *dev = &pdev->dev;
struct resource *mem;
const struct acpi_device_id *id;
struct dw_dma_platform_data *pdata;
int err;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->irq = platform_get_irq(pdev, 0);
if (chip->irq < 0)
return chip->irq;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
chip->regs = devm_ioremap_resource(dev, mem);
if (IS_ERR(chip->regs))
return PTR_ERR(chip->regs);
err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
pdata = dev_get_platdata(dev);
if (!pdata)
pdata = dw_dma_parse_dt(pdev);
if (!pdata && has_acpi_companion(dev)) {
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (id)
pdata = (struct dw_dma_platform_data *)id->driver_data;
}
chip->dev = dev;
chip->clk = devm_clk_get(chip->dev, "hclk");
if (IS_ERR(chip->clk))
return PTR_ERR(chip->clk);
err = clk_prepare_enable(chip->clk);
if (err)
return err;
pm_runtime_enable(&pdev->dev);
err = dw_dma_probe(chip, pdata);
if (err)
goto err_dw_dma_probe;
platform_set_drvdata(pdev, chip);
if (pdev->dev.of_node) {
err = of_dma_controller_register(pdev->dev.of_node,
dw_dma_of_xlate, chip->dw);
if (err)
dev_err(&pdev->dev,
"could not register of_dma_controller\n");
}
if (ACPI_HANDLE(&pdev->dev))
dw_dma_acpi_controller_register(chip->dw);
return 0;
err_dw_dma_probe:
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(chip->clk);
return err;
}
static int dw_remove(struct platform_device *pdev)
{
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
if (pdev->dev.of_node)
of_dma_controller_free(pdev->dev.of_node);
dw_dma_remove(chip);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(chip->clk);
return 0;
}
static void dw_shutdown(struct platform_device *pdev)
{
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
dw_dma_disable(chip);
clk_disable_unprepare(chip->clk);
}
#ifdef CONFIG_OF
static const struct of_device_id dw_dma_of_id_table[] = {
{ .compatible = "snps,dma-spear1340" },
{}
};
static int ntb_perf_thread(void *data)
{
struct pthr_ctx *pctx = data;
struct perf_ctx *perf = pctx->perf;
struct pci_dev *pdev = perf->ntb->pdev;
struct perf_mw *mw = &perf->mw;
char __iomem *dst;
u64 win_size, buf_size, total;
void *src;
int rc, node, i;
struct dma_chan *dma_chan = NULL;
pr_debug("kthread %s starting...\n", current->comm);
node = dev_to_node(&pdev->dev);
if (use_dma && !pctx->dma_chan) {
dma_cap_mask_t dma_mask;
dma_cap_zero(dma_mask);
dma_cap_set(DMA_MEMCPY, dma_mask);
dma_chan = dma_request_channel(dma_mask, perf_dma_filter_fn,
(void *)(unsigned long)node);
if (!dma_chan) {
pr_warn("%s: cannot acquire DMA channel, quitting\n",
current->comm);
return -ENODEV;
}
pctx->dma_chan = dma_chan;
}
for (i = 0; i < MAX_SRCS; i++) {
pctx->srcs[i] = kmalloc_node(MAX_TEST_SIZE, GFP_KERNEL, node);
if (!pctx->srcs[i]) {
rc = -ENOMEM;
goto err;
}
}
win_size = mw->phys_size;
buf_size = 1ULL << seg_order;
total = 1ULL << run_order;
if (buf_size > MAX_TEST_SIZE)
buf_size = MAX_TEST_SIZE;
dst = (char __iomem *)mw->vbase;
atomic_inc(&perf->tsync);
while (atomic_read(&perf->tsync) != perf->perf_threads)
schedule();
src = pctx->srcs[pctx->src_idx];
pctx->src_idx = (pctx->src_idx + 1) & (MAX_SRCS - 1);
rc = perf_move_data(pctx, dst, src, buf_size, win_size, total);
atomic_dec(&perf->tsync);
if (rc < 0) {
pr_err("%s: failed\n", current->comm);
rc = -ENXIO;
goto err;
}
for (i = 0; i < MAX_SRCS; i++) {
kfree(pctx->srcs[i]);
pctx->srcs[i] = NULL;
}
atomic_inc(&perf->tdone);
wake_up(pctx->wq);
rc = 0;
goto done;
err:
for (i = 0; i < MAX_SRCS; i++) {
kfree(pctx->srcs[i]);
pctx->srcs[i] = NULL;
}
if (dma_chan) {
dma_release_channel(dma_chan);
pctx->dma_chan = NULL;
}
done:
/* Wait until we are told to stop */
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (kthread_should_stop())
break;
schedule();
}
__set_current_state(TASK_RUNNING);
return rc;
}
int serial8250_request_dma(struct uart_8250_port *p)
{
struct uart_8250_dma *dma = p->dma;
phys_addr_t rx_dma_addr = dma->rx_dma_addr ?
dma->rx_dma_addr : p->port.mapbase;
phys_addr_t tx_dma_addr = dma->tx_dma_addr ?
dma->tx_dma_addr : p->port.mapbase;
dma_cap_mask_t mask;
struct dma_slave_caps caps;
int ret;
/* Default slave configuration parameters */
dma->rxconf.direction = DMA_DEV_TO_MEM;
dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma->rxconf.src_addr = rx_dma_addr + UART_RX;
dma->txconf.direction = DMA_MEM_TO_DEV;
dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma->txconf.dst_addr = tx_dma_addr + UART_TX;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
/* Get a channel for RX */
dma->rxchan = dma_request_slave_channel_compat(mask,
dma->fn, dma->rx_param,
p->port.dev, "rx");
if (!dma->rxchan)
return -ENODEV;
/* 8250 rx dma requires dmaengine driver to support pause/terminate */
ret = dma_get_slave_caps(dma->rxchan, &caps);
if (ret)
goto release_rx;
if (!caps.cmd_pause || !caps.cmd_terminate ||
caps.residue_granularity == DMA_RESIDUE_GRANULARITY_DESCRIPTOR) {
ret = -EINVAL;
goto release_rx;
}
dmaengine_slave_config(dma->rxchan, &dma->rxconf);
/* Get a channel for TX */
dma->txchan = dma_request_slave_channel_compat(mask,
dma->fn, dma->tx_param,
p->port.dev, "tx");
if (!dma->txchan) {
ret = -ENODEV;
goto release_rx;
}
/* 8250 tx dma requires dmaengine driver to support terminate */
ret = dma_get_slave_caps(dma->txchan, &caps);
if (ret)
goto err;
if (!caps.cmd_terminate) {
ret = -EINVAL;
goto err;
}
dmaengine_slave_config(dma->txchan, &dma->txconf);
/* RX buffer */
if (!dma->rx_size)
dma->rx_size = PAGE_SIZE;
dma->rx_buf = dma_alloc_coherent(dma->rxchan->device->dev, dma->rx_size,
&dma->rx_addr, GFP_KERNEL);
if (!dma->rx_buf) {
ret = -ENOMEM;
goto err;
}
/* TX buffer */
dma->tx_addr = dma_map_single(dma->txchan->device->dev,
p->port.state->xmit.buf,
UART_XMIT_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dma->txchan->device->dev, dma->tx_addr)) {
dma_free_coherent(dma->rxchan->device->dev, dma->rx_size,
dma->rx_buf, dma->rx_addr);
ret = -ENOMEM;
goto err;
}
dev_dbg_ratelimited(p->port.dev, "got both dma channels\n");
return 0;
err:
dma_release_channel(dma->txchan);
release_rx:
dma_release_channel(dma->rxchan);
return ret;
}
static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
struct rsnd_dma *dma, int id,
struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
{
struct rsnd_mod *mod = rsnd_mod_get(dma);
struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
struct rsnd_priv *priv = rsnd_io_to_priv(io);
struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
struct device *dev = rsnd_priv_to_dev(priv);
struct dma_slave_config cfg = {};
int is_play = rsnd_io_is_play(io);
int ret;
if (dmaen->chan) {
dev_err(dev, "it already has dma channel\n");
return -EIO;
}
if (dev->of_node) {
dmaen->chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
} else {
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dmaen->chan = dma_request_channel(mask, shdma_chan_filter,
(void *)(uintptr_t)id);
}
if (IS_ERR_OR_NULL(dmaen->chan)) {
dmaen->chan = NULL;
dev_err(dev, "can't get dma channel\n");
goto rsnd_dma_channel_err;
}
cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
cfg.src_addr = dma->src_addr;
cfg.dst_addr = dma->dst_addr;
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dev_dbg(dev, "%s[%d] %pad -> %pad\n",
rsnd_mod_name(mod), rsnd_mod_id(mod),
&cfg.src_addr, &cfg.dst_addr);
ret = dmaengine_slave_config(dmaen->chan, &cfg);
if (ret < 0)
goto rsnd_dma_attach_err;
dmac->dmaen_num++;
return 0;
rsnd_dma_attach_err:
rsnd_dmaen_remove(mod, io, priv);
rsnd_dma_channel_err:
/*
* DMA failed. try to PIO mode
* see
* rsnd_ssi_fallback()
* rsnd_rdai_continuance_probe()
*/
return -EAGAIN;
}
static unsigned int sirfsoc_uart_init_tx_dma(struct uart_port *port)
{
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
dma_cap_mask_t dma_mask;
struct dma_slave_config tx_slv_cfg = {
.dst_maxburst = 2,
};
dma_cap_zero(dma_mask);
dma_cap_set(DMA_SLAVE, dma_mask);
sirfport->tx_dma_chan = dma_request_channel(dma_mask,
(dma_filter_fn)sirfsoc_dma_filter_id,
(void *)sirfport->tx_dma_no);
if (!sirfport->tx_dma_chan) {
dev_err(port->dev, "Uart Request Dma Channel Fail %d\n",
sirfport->tx_dma_no);
return -EPROBE_DEFER;
}
dmaengine_slave_config(sirfport->tx_dma_chan, &tx_slv_cfg);
return 0;
}
static unsigned int sirfsoc_uart_init_rx_dma(struct uart_port *port)
{
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
dma_cap_mask_t dma_mask;
int ret;
int i, j;
struct dma_slave_config slv_cfg = {
.src_maxburst = 2,
};
dma_cap_zero(dma_mask);
dma_cap_set(DMA_SLAVE, dma_mask);
sirfport->rx_dma_chan = dma_request_channel(dma_mask,
(dma_filter_fn)sirfsoc_dma_filter_id,
(void *)sirfport->rx_dma_no);
if (!sirfport->rx_dma_chan) {
dev_err(port->dev, "Uart Request Dma Channel Fail %d\n",
sirfport->rx_dma_no);
ret = -EPROBE_DEFER;
goto request_err;
}
for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++) {
sirfport->rx_dma_items[i].xmit.buf =
dma_alloc_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
&sirfport->rx_dma_items[i].dma_addr, GFP_KERNEL);
if (!sirfport->rx_dma_items[i].xmit.buf) {
dev_err(port->dev, "Uart alloc bufa failed\n");
ret = -ENOMEM;
goto alloc_coherent_err;
}
sirfport->rx_dma_items[i].xmit.head =
sirfport->rx_dma_items[i].xmit.tail = 0;
}
dmaengine_slave_config(sirfport->rx_dma_chan, &slv_cfg);
return 0;
alloc_coherent_err:
for (j = 0; j < i; j++)
dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
sirfport->rx_dma_items[j].xmit.buf,
sirfport->rx_dma_items[j].dma_addr);
dma_release_channel(sirfport->rx_dma_chan);
request_err:
return ret;
}
static void sirfsoc_uart_uninit_tx_dma(struct sirfsoc_uart_port *sirfport)
{
dmaengine_terminate_all(sirfport->tx_dma_chan);
dma_release_channel(sirfport->tx_dma_chan);
}
static void sirfsoc_uart_uninit_rx_dma(struct sirfsoc_uart_port *sirfport)
{
int i;
struct uart_port *port = &sirfport->port;
dmaengine_terminate_all(sirfport->rx_dma_chan);
dma_release_channel(sirfport->rx_dma_chan);
for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++)
dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
sirfport->rx_dma_items[i].xmit.buf,
sirfport->rx_dma_items[i].dma_addr);
}
void __init at91_add_device_hdmac(void)
{
dma_cap_set(DMA_MEMCPY, atdma_pdata.cap_mask);
dma_cap_set(DMA_SLAVE, atdma_pdata.cap_mask);
platform_device_register(&at_hdmac_device);
}
void __init iop13xx_platform_init(void)
{
int i;
u32 uart_idx, i2c_idx, adma_idx, plat_idx;
struct platform_device *iop13xx_devices[IQ81340_MAX_PLAT_DEVICES];
iop13xx_set_atu_mmr_bases();
memset(iop13xx_devices, 0, sizeof(iop13xx_devices));
if (init_uart == IOP13XX_INIT_UART_DEFAULT) {
switch (iop13xx_dev_id()) {
case 0x3380:
case 0x3384:
case 0x3388:
case 0x338c:
init_uart |= IOP13XX_INIT_UART_0;
init_uart |= IOP13XX_INIT_UART_1;
break;
default:
init_uart |= IOP13XX_INIT_UART_1;
}
}
if (init_i2c == IOP13XX_INIT_I2C_DEFAULT) {
switch (iop13xx_dev_id()) {
case 0x3380:
case 0x3384:
case 0x3388:
case 0x338c:
case 0x3382:
case 0x3386:
case 0x338a:
case 0x338e:
init_i2c |= IOP13XX_INIT_I2C_0;
init_i2c |= IOP13XX_INIT_I2C_1;
init_i2c |= IOP13XX_INIT_I2C_2;
break;
default:
init_i2c |= IOP13XX_INIT_I2C_1;
init_i2c |= IOP13XX_INIT_I2C_2;
}
}
if (init_adma == IOP13XX_INIT_ADMA_DEFAULT) {
init_adma |= IOP13XX_INIT_ADMA_0;
init_adma |= IOP13XX_INIT_ADMA_1;
init_adma |= IOP13XX_INIT_ADMA_2;
}
plat_idx = 0;
uart_idx = 0;
i2c_idx = 0;
if (init_uart & IOP13XX_INIT_UART_1) {
PRINTK("Adding uart1 to platform device list\n");
iop13xx_uart1.id = uart_idx++;
iop13xx_devices[plat_idx++] = &iop13xx_uart1;
}
if (init_uart & IOP13XX_INIT_UART_0) {
PRINTK("Adding uart0 to platform device list\n");
iop13xx_uart0.id = uart_idx++;
iop13xx_devices[plat_idx++] = &iop13xx_uart0;
}
for(i = 0; i < IQ81340_NUM_I2C; i++) {
if ((init_i2c & (1 << i)) && IOP13XX_SETUP_DEBUG)
printk("Adding i2c%d to platform device list\n", i);
switch(init_i2c & (1 << i)) {
case IOP13XX_INIT_I2C_0:
iop13xx_i2c_0_controller.id = i2c_idx++;
iop13xx_devices[plat_idx++] =
&iop13xx_i2c_0_controller;
break;
case IOP13XX_INIT_I2C_1:
iop13xx_i2c_1_controller.id = i2c_idx++;
iop13xx_devices[plat_idx++] =
&iop13xx_i2c_1_controller;
break;
case IOP13XX_INIT_I2C_2:
iop13xx_i2c_2_controller.id = i2c_idx++;
iop13xx_devices[plat_idx++] =
&iop13xx_i2c_2_controller;
break;
}
}
adma_idx = 0;
for (i = 0; i < IQ81340_NUM_ADMA; i++) {
struct iop_adma_platform_data *plat_data;
if ((init_adma & (1 << i)) && IOP13XX_SETUP_DEBUG)
printk(KERN_INFO
"Adding adma%d to platform device list\n", i);
switch (init_adma & (1 << i)) {
case IOP13XX_INIT_ADMA_0:
iop13xx_adma_0_channel.id = adma_idx++;
iop13xx_devices[plat_idx++] = &iop13xx_adma_0_channel;
plat_data = &iop13xx_adma_0_data;
dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
dma_cap_set(DMA_XOR, plat_data->cap_mask);
dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
break;
case IOP13XX_INIT_ADMA_1:
iop13xx_adma_1_channel.id = adma_idx++;
iop13xx_devices[plat_idx++] = &iop13xx_adma_1_channel;
plat_data = &iop13xx_adma_1_data;
dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
dma_cap_set(DMA_XOR, plat_data->cap_mask);
dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
break;
case IOP13XX_INIT_ADMA_2:
iop13xx_adma_2_channel.id = adma_idx++;
iop13xx_devices[plat_idx++] = &iop13xx_adma_2_channel;
plat_data = &iop13xx_adma_2_data;
dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
dma_cap_set(DMA_XOR, plat_data->cap_mask);
dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
dma_cap_set(DMA_PQ, plat_data->cap_mask);
dma_cap_set(DMA_PQ_VAL, plat_data->cap_mask);
break;
}
}
#ifdef CONFIG_MTD_PHYSMAP
iq8134x_flash_resource.end = iq8134x_flash_resource.start +
iq8134x_probe_flash_size() - 1;
if (iq8134x_flash_resource.end > iq8134x_flash_resource.start)
iop13xx_devices[plat_idx++] = &iq8134x_flash;
else
printk(KERN_ERR "%s: Failed to probe flash size\n", __func__);
#endif
platform_add_devices(iop13xx_devices, plat_idx);
}
static int bcm2835_sdhost_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct clk *clk;
struct resource *iomem;
struct bcm2835_host *host;
struct mmc_host *mmc;
int ret;
pr_debug("bcm2835_sdhost_probe\n");
mmc = mmc_alloc_host(sizeof(*host), dev);
if (!mmc)
return -ENOMEM;
mmc->ops = &bcm2835_sdhost_ops;
host = mmc_priv(mmc);
host->mmc = mmc;
host->pio_timeout = msecs_to_jiffies(500);
host->max_delay = 1; /* Warn if over 1ms */
spin_lock_init(&host->lock);
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
host->ioaddr = devm_ioremap_resource(dev, iomem);
if (IS_ERR(host->ioaddr)) {
ret = PTR_ERR(host->ioaddr);
goto err;
}
host->phys_addr = iomem->start + BCM2835_VCMMU_SHIFT;
pr_debug(" - ioaddr %lx, iomem->start %lx, phys_addr %lx\n",
(unsigned long)host->ioaddr,
(unsigned long)iomem->start,
(unsigned long)host->phys_addr);
host->allow_dma = ALLOW_DMA;
if (node) {
/* Read any custom properties */
of_property_read_u32(node,
"brcm,delay-after-stop",
&host->delay_after_stop);
of_property_read_u32(node,
"brcm,overclock-50",
&host->overclock_50);
of_property_read_u32(node,
"brcm,pio-limit",
&host->pio_limit);
host->allow_dma = ALLOW_DMA &&
!of_property_read_bool(node, "brcm,force-pio");
host->debug = of_property_read_bool(node, "brcm,debug");
}
if (host->allow_dma) {
if (node) {
host->dma_chan_tx =
dma_request_slave_channel(dev, "tx");
host->dma_chan_rx =
dma_request_slave_channel(dev, "rx");
} else {
dma_cap_mask_t mask;
dma_cap_zero(mask);
/* we don't care about the channel, any would work */
dma_cap_set(DMA_SLAVE, mask);
host->dma_chan_tx =
dma_request_channel(mask, NULL, NULL);
host->dma_chan_rx =
dma_request_channel(mask, NULL, NULL);
}
}
clk = devm_clk_get(dev, NULL);
if (IS_ERR(clk)) {
dev_err(dev, "could not get clk\n");
ret = PTR_ERR(clk);
goto err;
}
host->max_clk = clk_get_rate(clk);
host->irq = platform_get_irq(pdev, 0);
if (host->irq <= 0) {
dev_err(dev, "get IRQ failed\n");
ret = -EINVAL;
goto err;
}
pr_debug(" - max_clk %lx, irq %d\n",
(unsigned long)host->max_clk,
(int)host->irq);
if (node)
mmc_of_parse(mmc);
else
mmc->caps |= MMC_CAP_4_BIT_DATA;
ret = bcm2835_sdhost_add_host(host);
if (ret)
goto err;
platform_set_drvdata(pdev, host);
pr_debug("bcm2835_sdhost_probe -> OK\n");
return 0;
err:
pr_debug("bcm2835_sdhost_probe -> err %d\n", ret);
mmc_free_host(mmc);
return ret;
}
int __init p7_init_dma(void)
{
int err;
int const rev = p7_chiprev();
pr_debug("p7: registering %s...\n", p7_dma_dev.dev.init_name);
if (rev == P7_CHIPREV_R1) {
/* P7 first revision initializes DMA controller in non secure mode
* when coming out of reset but it is not possible to switch back to
* secure mode. Since Linux / cores / L2 cache controller run in
* secure mode, and all DMA controller transactions going through ACP
* port are flagged as non secure, CPU and DMA accesses to the same
* address won't point to same L2 cache internal location.
* Therefore, we must disable DMA RAM to RAM ACP accesses (and
* bypass L2 cache) to perform transactions directly onto main AXI
* system bus (the one behind L2 cache).
*/
#define P7_NIC_REMAP P7_NIC
#define NIC_NOACP (1U << 7)
__raw_writel(NIC_NOACP, MMIO_P2V(P7_NIC_REMAP));
/* On R1, DMA interrupts are not shared */
p7_dma_dev.irq[0] = P7_R1_DMA_ABORT_IRQ;
p7_dma_dev.irq[1] = P7_R1_DMA5_IRQ;
p7_dma_pdata.flushp = true;
}
else if (rev == P7_CHIPREV_R2 ||
rev == P7_CHIPREV_R3) {
/*
* P7_NIC_REMAP is write-only, we can't check the REMAP_DRAM bit
* value. The assumption is made that it is already set at this point,
* so we add it to our bitmask.
*/
#define NIC_REMAP_DRAM (1U)
__raw_writel(NIC_REMAP_DRAM | NIC_NOACP, MMIO_P2V(P7_NIC_REMAP));
p7_dma_pdata.flushp = true;
}
dma_cap_set(DMA_MEMCPY, p7_dma_pdata.cap_mask);
dma_cap_set(DMA_SLAVE, p7_dma_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, p7_dma_pdata.cap_mask);
err = amba_device_register(&p7_dma_dev, &iomem_resource);
if (err)
panic("p7: failed to register %s (%d)\n",
p7_dma_dev.dev.init_name,
err);
/*
* We want to store controller microcode into internal RAM for performance
* reasons.
* As amba_device holds a single resource and pl330 driver does not handle
* multiple memory resources, we have to reserve microcode memory region here.
* Related device must have been initialized (amba_device_register) before
* using dma_declare_coherent_memory.
* Moreover, dma_declare_coherent_memory must be performed before pl330
* driver loaded since it allocates microcode region at probing time.
*/
if (! (dma_declare_coherent_memory(&p7_dma_dev.dev,
p7_dma_ucode_addr(),
p7_dma_ucode_addr(),
p7_dma_ucode_sz(),
DMA_MEMORY_MAP |
DMA_MEMORY_EXCLUSIVE) &
DMA_MEMORY_MAP))
/* Failure: will use DMA zone located in system RAM. */
panic("p7: failed to map DMA controller microcode memory region [%08x:%08x]\n",
p7_dma_ucode_addr(),
p7_dma_ucode_addr() + p7_dma_ucode_sz() - 1);
dev_info(&p7_dma_dev.dev,
"mapped microcode memory region [%08x:%08x]\n",
p7_dma_ucode_addr(),
p7_dma_ucode_addr() + p7_dma_ucode_sz() - 1);
return 0;
}
static int __init exynos_dma_init(void)
{
if (of_have_populated_dt())
return 0;
if (soc_is_exynos4210()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos4210_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos4210_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos4210_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos4210_pdma1_peri;
} else if (soc_is_exynos4212() || soc_is_exynos4412()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos4212_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos4212_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos4212_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos4212_pdma1_peri;
} else if (soc_is_exynos4415()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos4415_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos4415_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos4415_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos4415_pdma1_peri;
} else if (soc_is_exynos5250()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5250_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos5250_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5250_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos5250_pdma1_peri;
} else if (soc_is_exynos5410()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5410_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos5410_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5410_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos5410_pdma1_peri;
} else if (soc_is_exynos5420()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5420_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos5420_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5420_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos5420_pdma1_peri;
exynos_adma0_pdata.nr_valid_peri =
ARRAY_SIZE(adma0_peri);
exynos_adma0_pdata.peri_id = adma0_peri;
} else if (soc_is_exynos5260()) {
exynos5260_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos5260_pdma0_peri);
exynos5260_pdma0_pdata.peri_id = exynos5260_pdma0_peri;
} else if (soc_is_exynos3470()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos3470_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos3470_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos3470_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos3470_pdma1_peri;
} else if (soc_is_exynos3250()) {
exynos_pdma0_pdata.nr_valid_peri =
ARRAY_SIZE(exynos3250_pdma0_peri);
exynos_pdma0_pdata.peri_id = exynos3250_pdma0_peri;
exynos_pdma1_pdata.nr_valid_peri =
ARRAY_SIZE(exynos3250_pdma1_peri);
exynos_pdma1_pdata.peri_id = exynos3250_pdma1_peri;
}
if (soc_is_exynos4210() || soc_is_exynos4212() ||
soc_is_exynos4412() || soc_is_exynos3470()) {
exynos_pdma0_device.res.start = EXYNOS4_PA_PDMA0;
exynos_pdma0_device.res.end = EXYNOS4_PA_PDMA0 + SZ_4K;
exynos_pdma0_device.irq[0] = EXYNOS4_IRQ_PDMA0;
exynos_pdma1_device.res.start = EXYNOS4_PA_PDMA1;
exynos_pdma1_device.res.end = EXYNOS4_PA_PDMA1 + SZ_4K;
exynos_pdma1_device.irq[0] = EXYNOS4_IRQ_PDMA1;
exynos_mdma_device.res.start = EXYNOS4_PA_MDMA1;
exynos_mdma_device.res.end = EXYNOS4_PA_MDMA1 + SZ_4K;
exynos_mdma_device.irq[0] = EXYNOS4_IRQ_MDMA1;
} else if (soc_is_exynos5410() || soc_is_exynos5420()) {
exynos_mdma_device.res.start = EXYNOS5_PA_MDMA0;
exynos_mdma_device.res.end = EXYNOS5_PA_MDMA0 + SZ_4K;
exynos_mdma_device.irq[0] = EXYNOS5_IRQ_MDMA0;
} else if (soc_is_exynos5260()) {
exynos5260_pdma0_device.res.start = EXYNOS5260_PA_PDMA0;
exynos5260_pdma0_device.res.end = EXYNOS5260_PA_PDMA0 + SZ_4K;
exynos5260_pdma0_device.irq[0] = EXYNOS5260_IRQ_PDMA0;
exynos5260_mdma_device.res.start = EXYNOS5260_PA_NS_MDMA0;
exynos5260_mdma_device.res.end = EXYNOS5260_PA_NS_MDMA0 + SZ_4K;
exynos5260_mdma_device.irq[0] = EXYNOS5260_IRQ_MDMA_1;
exynos5260_adma_device.res.start = EXYNOS5260_PA_ADMA0;
exynos5260_adma_device.res.end = EXYNOS5260_PA_ADMA0 + SZ_4K;
exynos5260_adma_device.irq[0] = EXYNOS5260_IRQ_ADMA;
} else if (soc_is_exynos4415()) {
exynos_pdma0_device.res.start = EXYNOS4_PA_PDMA0;
exynos_pdma0_device.res.end = EXYNOS4_PA_PDMA0 + SZ_4K;
exynos_pdma0_device.irq[0] = EXYNOS4_IRQ_PDMA0;
exynos_pdma1_device.res.start = EXYNOS4_PA_PDMA1;
exynos_pdma1_device.res.end = EXYNOS4_PA_PDMA1 + SZ_4K;
exynos_pdma1_device.irq[0] = EXYNOS4_IRQ_PDMA1;
exynos_mdma_device.res.start = EXYNOS4_PA_MDMA1;
exynos_mdma_device.res.end = EXYNOS4_PA_MDMA1 + SZ_4K;
exynos_mdma_device.irq[0] = EXYNOS4_IRQ_MDMA1;
} else if (soc_is_exynos3250()) {
exynos_pdma0_device.res.start = EXYNOS3_PA_PDMA0;
exynos_pdma0_device.res.end = EXYNOS3_PA_PDMA0 + SZ_4K;
exynos_pdma0_device.irq[0] = EXYNOS3_IRQ_PDMA0;
exynos_pdma1_device.res.start = EXYNOS3_PA_PDMA1;
exynos_pdma1_device.res.end = EXYNOS3_PA_PDMA1 + SZ_4K;
exynos_pdma1_device.irq[0] = EXYNOS3_IRQ_PDMA1;
}
if (soc_is_exynos5260()) {
dma_cap_set(DMA_SLAVE, exynos5260_pdma0_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos5260_pdma0_pdata.cap_mask);
amba_device_register(&exynos5260_pdma0_device, &iomem_resource);
dma_cap_set(DMA_MEMCPY, exynos5260_mdma_pdata.cap_mask);
amba_device_register(&exynos5260_mdma_device, &iomem_resource);
dma_cap_set(DMA_SLAVE, exynos5260_adma_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos5260_adma_pdata.cap_mask);
amba_device_register(&exynos5260_adma_device, &iomem_resource);
} else if (soc_is_exynos3250()) {
dma_cap_set(DMA_SLAVE, exynos_pdma0_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos_pdma0_pdata.cap_mask);
amba_device_register(&exynos_pdma0_device, &iomem_resource);
dma_cap_set(DMA_SLAVE, exynos_pdma1_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos_pdma1_pdata.cap_mask);
amba_device_register(&exynos_pdma1_device, &iomem_resource);
} else {
dma_cap_set(DMA_SLAVE, exynos_pdma0_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos_pdma0_pdata.cap_mask);
amba_device_register(&exynos_pdma0_device, &iomem_resource);
dma_cap_set(DMA_SLAVE, exynos_pdma1_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos_pdma1_pdata.cap_mask);
amba_device_register(&exynos_pdma1_device, &iomem_resource);
dma_cap_set(DMA_MEMCPY, exynos_mdma_pdata.cap_mask);
amba_device_register(&exynos_mdma_device, &iomem_resource);
}
if (soc_is_exynos5420()) {
dma_cap_set(DMA_SLAVE, exynos_adma0_pdata.cap_mask);
dma_cap_set(DMA_CYCLIC, exynos_adma0_pdata.cap_mask);
amba_device_register(&exynos_adma0_device, &iomem_resource);
}
return 0;
}
/**
* i2s_dma_start - prepare and reserve dma channels
* @arg : intel_mid_i2s_hdl pointer to that should be driver data (context)
*
* "ssp open" context and dmac1 should already be filled in drv_data
*
* Output parameters
* int : should be zero, else it means error code
*/
static int i2s_dma_start(struct intel_mid_i2s_hdl *drv_data)
{
struct intel_mid_dma_slave *rxs, *txs;
struct pci_dev *l_pdev;
struct intel_mid_i2s_settings *ssp_settings =
&(drv_data->current_settings);
dma_cap_mask_t mask;
int retval = 0;
int temp = 0;
dev_dbg(&drv_data->pdev->dev, "DMAC1 start\n");
drv_data->txchan = NULL;
drv_data->rxchan = NULL;
l_pdev = drv_data->pdev;
if (ssp_settings->ssp_active_rx_slots_map) {
/* 1. init rx channel */
rxs = &drv_data->dmas_rx;
rxs->dma_slave.direction = DMA_FROM_DEVICE;
rxs->hs_mode = LNW_DMA_HW_HS;
rxs->cfg_mode = LNW_DMA_PER_TO_MEM;
temp = i2s_compute_dma_width(ssp_settings->data_size,
&rxs->dma_slave.src_addr_width);
if (temp != 0) {
dev_err(&(drv_data->pdev->dev),
"RX DMA Channel Bad data_size = %d\n",
ssp_settings->data_size);
retval = -1;
goto err_exit;
}
rxs->dma_slave.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
temp = i2s_compute_dma_msize(
ssp_settings->ssp_rx_fifo_threshold,
&rxs->dma_slave.src_maxburst);
if (temp != 0) {
dev_err(&(drv_data->pdev->dev),
"RX DMA Channel Bad RX FIFO Threshold src= %d\n",
ssp_settings->ssp_rx_fifo_threshold);
retval = -2;
goto err_exit;
}
temp = i2s_compute_dma_msize(
ssp_settings->ssp_rx_fifo_threshold,
&rxs->dma_slave.dst_maxburst);
if (temp != 0) {
dev_err(&(drv_data->pdev->dev),
"RX DMA Channel Bad RX FIFO Threshold dst= %d\n",
ssp_settings->ssp_rx_fifo_threshold);
retval = -3;
goto err_exit;
}
rxs->device_instance = drv_data->device_instance;
dma_cap_zero(mask);
dma_cap_set(DMA_MEMCPY, mask);
dma_cap_set(DMA_SLAVE, mask);
drv_data->rxchan = dma_request_channel(mask,
chan_filter, drv_data);
if (!drv_data->rxchan) {
dev_err(&(drv_data->pdev->dev),
"Could not get Rx channel\n");
retval = -4;
goto err_exit;
}
temp = drv_data->rxchan->device->device_control(
drv_data->rxchan, DMA_SLAVE_CONFIG,
(unsigned long) &rxs->dma_slave);
if (temp) {
dev_err(&(drv_data->pdev->dev),
"Rx slave control failed\n");
retval = -5;
goto err_exit;
}
}
if (ssp_settings->ssp_active_tx_slots_map) {
/* 2. init tx channel */
txs = &drv_data->dmas_tx;
txs->dma_slave.direction = DMA_TO_DEVICE;
txs->hs_mode = LNW_DMA_HW_HS;
txs->cfg_mode = LNW_DMA_MEM_TO_PER;
txs->dma_slave.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
temp = i2s_compute_dma_width(ssp_settings->data_size,
&txs->dma_slave.dst_addr_width);
if (temp != 0) {
dev_err(&(drv_data->pdev->dev),
"TX DMA Channel Bad data_size = %d\n",
ssp_settings->data_size);
retval = -6;
goto err_exit;
}
temp = i2s_compute_dma_msize(
ssp_settings->ssp_tx_fifo_threshold + 1,
&txs->dma_slave.src_maxburst);
if (temp != 0) {
dev_err(&(drv_data->pdev->dev),
"TX DMA Channel Bad TX FIFO Threshold src= %d\n",
ssp_settings->ssp_tx_fifo_threshold);
retval = -7;
goto err_exit;
}
temp = i2s_compute_dma_msize(
ssp_settings->ssp_tx_fifo_threshold + 1,
&txs->dma_slave.dst_maxburst);
if (temp != 0) {
dev_err(&(drv_data->pdev->dev),
"TX DMA Channel Bad TX FIFO Threshold dst= %d\n",
ssp_settings->ssp_tx_fifo_threshold);
retval = -8;
goto err_exit;
}
txs->device_instance = drv_data->device_instance;
dma_cap_set(DMA_SLAVE, mask);
dma_cap_set(DMA_MEMCPY, mask);
drv_data->txchan = dma_request_channel(mask,
chan_filter, drv_data);
if (!drv_data->txchan) {
dev_err(&(drv_data->pdev->dev),
"Could not get Tx channel\n");
retval = -10;
goto err_exit;
}
temp = drv_data->txchan->device->device_control(
drv_data->txchan, DMA_SLAVE_CONFIG,
(unsigned long) &txs->dma_slave);
if (temp) {
dev_err(&(drv_data->pdev->dev),
"Tx slave control failed\n");
retval = -9;
goto err_exit;
}
}
return retval;
err_exit:
if (drv_data->txchan)
dma_release_channel(drv_data->txchan);
if (drv_data->rxchan)
dma_release_channel(drv_data->rxchan);
drv_data->rxchan = NULL;
drv_data->txchan = NULL;
return retval;
}
