{
struct spi_device *spi = to_spi_device(dev);
- /* spi masters may cleanup for released devices */
- if (spi->master->cleanup)
- spi->master->cleanup(spi);
+ /* spi controllers may cleanup for released devices */
+ if (spi->controller->cleanup)
+ spi->controller->cleanup(spi);
- spi_master_put(spi->master);
+ spi_controller_put(spi->controller);
kfree(spi);
}
static DEVICE_ATTR_RO(modalias);
#define SPI_STATISTICS_ATTRS(field, file) \
-static ssize_t spi_master_##field##_show(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
+static ssize_t spi_controller_##field##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
{ \
- struct spi_master *master = container_of(dev, \
- struct spi_master, dev); \
- return spi_statistics_##field##_show(&master->statistics, buf); \
+ struct spi_controller *ctlr = container_of(dev, \
+ struct spi_controller, dev); \
+ return spi_statistics_##field##_show(&ctlr->statistics, buf); \
} \
-static struct device_attribute dev_attr_spi_master_##field = { \
+static struct device_attribute dev_attr_spi_controller_##field = { \
.attr = { .name = file, .mode = 0444 }, \
- .show = spi_master_##field##_show, \
+ .show = spi_controller_##field##_show, \
}; \
static ssize_t spi_device_##field##_show(struct device *dev, \
struct device_attribute *attr, \
NULL,
};
-static struct attribute *spi_master_statistics_attrs[] = {
- &dev_attr_spi_master_messages.attr,
- &dev_attr_spi_master_transfers.attr,
- &dev_attr_spi_master_errors.attr,
- &dev_attr_spi_master_timedout.attr,
- &dev_attr_spi_master_spi_sync.attr,
- &dev_attr_spi_master_spi_sync_immediate.attr,
- &dev_attr_spi_master_spi_async.attr,
- &dev_attr_spi_master_bytes.attr,
- &dev_attr_spi_master_bytes_rx.attr,
- &dev_attr_spi_master_bytes_tx.attr,
- &dev_attr_spi_master_transfer_bytes_histo0.attr,
- &dev_attr_spi_master_transfer_bytes_histo1.attr,
- &dev_attr_spi_master_transfer_bytes_histo2.attr,
- &dev_attr_spi_master_transfer_bytes_histo3.attr,
- &dev_attr_spi_master_transfer_bytes_histo4.attr,
- &dev_attr_spi_master_transfer_bytes_histo5.attr,
- &dev_attr_spi_master_transfer_bytes_histo6.attr,
- &dev_attr_spi_master_transfer_bytes_histo7.attr,
- &dev_attr_spi_master_transfer_bytes_histo8.attr,
- &dev_attr_spi_master_transfer_bytes_histo9.attr,
- &dev_attr_spi_master_transfer_bytes_histo10.attr,
- &dev_attr_spi_master_transfer_bytes_histo11.attr,
- &dev_attr_spi_master_transfer_bytes_histo12.attr,
- &dev_attr_spi_master_transfer_bytes_histo13.attr,
- &dev_attr_spi_master_transfer_bytes_histo14.attr,
- &dev_attr_spi_master_transfer_bytes_histo15.attr,
- &dev_attr_spi_master_transfer_bytes_histo16.attr,
- &dev_attr_spi_master_transfers_split_maxsize.attr,
+static struct attribute *spi_controller_statistics_attrs[] = {
+ &dev_attr_spi_controller_messages.attr,
+ &dev_attr_spi_controller_transfers.attr,
+ &dev_attr_spi_controller_errors.attr,
+ &dev_attr_spi_controller_timedout.attr,
+ &dev_attr_spi_controller_spi_sync.attr,
+ &dev_attr_spi_controller_spi_sync_immediate.attr,
+ &dev_attr_spi_controller_spi_async.attr,
+ &dev_attr_spi_controller_bytes.attr,
+ &dev_attr_spi_controller_bytes_rx.attr,
+ &dev_attr_spi_controller_bytes_tx.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo0.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo1.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo2.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo3.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo4.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo5.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo6.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo7.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo8.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo9.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo10.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo11.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo12.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo13.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo14.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo15.attr,
+ &dev_attr_spi_controller_transfer_bytes_histo16.attr,
+ &dev_attr_spi_controller_transfers_split_maxsize.attr,
NULL,
};
-static const struct attribute_group spi_master_statistics_group = {
+static const struct attribute_group spi_controller_statistics_group = {
.name = "statistics",
- .attrs = spi_master_statistics_attrs,
+ .attrs = spi_controller_statistics_attrs,
};
static const struct attribute_group *spi_master_groups[] = {
- &spi_master_statistics_group,
+ &spi_controller_statistics_group,
NULL,
};
void spi_statistics_add_transfer_stats(struct spi_statistics *stats,
struct spi_transfer *xfer,
- struct spi_master *master)
+ struct spi_controller *ctlr)
{
unsigned long flags;
int l2len = min(fls(xfer->len), SPI_STATISTICS_HISTO_SIZE) - 1;
stats->bytes += xfer->len;
if ((xfer->tx_buf) &&
- (xfer->tx_buf != master->dummy_tx))
+ (xfer->tx_buf != ctlr->dummy_tx))
stats->bytes_tx += xfer->len;
if ((xfer->rx_buf) &&
- (xfer->rx_buf != master->dummy_rx))
+ (xfer->rx_buf != ctlr->dummy_rx))
stats->bytes_rx += xfer->len;
spin_unlock_irqrestore(&stats->lock, flags);
/*-------------------------------------------------------------------------*/
/* SPI devices should normally not be created by SPI device drivers; that
- * would make them board-specific. Similarly with SPI master drivers.
+ * would make them board-specific. Similarly with SPI controller drivers.
* Device registration normally goes into like arch/.../mach.../board-YYY.c
* with other readonly (flashable) information about mainboard devices.
*/
};
static LIST_HEAD(board_list);
-static LIST_HEAD(spi_master_list);
+static LIST_HEAD(spi_controller_list);
/*
* Used to protect add/del opertion for board_info list and
- * spi_master list, and their matching process
+ * spi_controller list, and their matching process
*/
static DEFINE_MUTEX(board_lock);
/**
* spi_alloc_device - Allocate a new SPI device
- * @master: Controller to which device is connected
+ * @ctlr: Controller to which device is connected
* Context: can sleep
*
* Allows a driver to allocate and initialize a spi_device without
* spi_add_device() on it.
*
* Caller is responsible to call spi_add_device() on the returned
- * spi_device structure to add it to the SPI master. If the caller
+ * spi_device structure to add it to the SPI controller. If the caller
* needs to discard the spi_device without adding it, then it should
* call spi_dev_put() on it.
*
* Return: a pointer to the new device, or NULL.
*/
-struct spi_device *spi_alloc_device(struct spi_master *master)
+struct spi_device *spi_alloc_device(struct spi_controller *ctlr)
{
struct spi_device *spi;
- if (!spi_master_get(master))
+ if (!spi_controller_get(ctlr))
return NULL;
spi = kzalloc(sizeof(*spi), GFP_KERNEL);
if (!spi) {
- spi_master_put(master);
+ spi_controller_put(ctlr);
return NULL;
}
- spi->master = master;
- spi->dev.parent = &master->dev;
+ spi->master = spi->controller = ctlr;
+ spi->dev.parent = &ctlr->dev;
spi->dev.bus = &spi_bus_type;
spi->dev.release = spidev_release;
spi->cs_gpio = -ENOENT;
return;
}
- dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->master->dev),
+ dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->controller->dev),
spi->chip_select);
}
struct spi_device *spi = to_spi_device(dev);
struct spi_device *new_spi = data;
- if (spi->master == new_spi->master &&
+ if (spi->controller == new_spi->controller &&
spi->chip_select == new_spi->chip_select)
return -EBUSY;
return 0;
int spi_add_device(struct spi_device *spi)
{
static DEFINE_MUTEX(spi_add_lock);
- struct spi_master *master = spi->master;
- struct device *dev = master->dev.parent;
+ struct spi_controller *ctlr = spi->controller;
+ struct device *dev = ctlr->dev.parent;
int status;
/* Chipselects are numbered 0..max; validate. */
- if (spi->chip_select >= master->num_chipselect) {
- dev_err(dev, "cs%d >= max %d\n",
- spi->chip_select,
- master->num_chipselect);
+ if (spi->chip_select >= ctlr->num_chipselect) {
+ dev_err(dev, "cs%d >= max %d\n", spi->chip_select,
+ ctlr->num_chipselect);
return -EINVAL;
}
goto done;
}
- if (master->cs_gpios)
- spi->cs_gpio = master->cs_gpios[spi->chip_select];
+ if (ctlr->cs_gpios)
+ spi->cs_gpio = ctlr->cs_gpios[spi->chip_select];
/* Drivers may modify this initial i/o setup, but will
* normally rely on the device being setup. Devices
/**
* spi_new_device - instantiate one new SPI device
- * @master: Controller to which device is connected
+ * @ctlr: Controller to which device is connected
* @chip: Describes the SPI device
* Context: can sleep
*
*
* Return: the new device, or NULL.
*/
-struct spi_device *spi_new_device(struct spi_master *master,
+struct spi_device *spi_new_device(struct spi_controller *ctlr,
struct spi_board_info *chip)
{
struct spi_device *proxy;
* suggests syslogged diagnostics are best here (ugh).
*/
- proxy = spi_alloc_device(master);
+ proxy = spi_alloc_device(ctlr);
if (!proxy)
return NULL;
if (chip->properties) {
status = device_add_properties(&proxy->dev, chip->properties);
if (status) {
- dev_err(&master->dev,
+ dev_err(&ctlr->dev,
"failed to add properties to '%s': %d\n",
chip->modalias, status);
goto err_dev_put;
* @spi: spi_device to unregister
*
* Start making the passed SPI device vanish. Normally this would be handled
- * by spi_unregister_master().
+ * by spi_unregister_controller().
*/
void spi_unregister_device(struct spi_device *spi)
{
}
EXPORT_SYMBOL_GPL(spi_unregister_device);
-static void spi_match_master_to_boardinfo(struct spi_master *master,
- struct spi_board_info *bi)
+static void spi_match_controller_to_boardinfo(struct spi_controller *ctlr,
+ struct spi_board_info *bi)
{
struct spi_device *dev;
- if (master->bus_num != bi->bus_num)
+ if (ctlr->bus_num != bi->bus_num)
return;
- dev = spi_new_device(master, bi);
+ dev = spi_new_device(ctlr, bi);
if (!dev)
- dev_err(master->dev.parent, "can't create new device for %s\n",
+ dev_err(ctlr->dev.parent, "can't create new device for %s\n",
bi->modalias);
}
return -ENOMEM;
for (i = 0; i < n; i++, bi++, info++) {
- struct spi_master *master;
+ struct spi_controller *ctlr;
memcpy(&bi->board_info, info, sizeof(*info));
if (info->properties) {
mutex_lock(&board_lock);
list_add_tail(&bi->list, &board_list);
- list_for_each_entry(master, &spi_master_list, list)
- spi_match_master_to_boardinfo(master, &bi->board_info);
+ list_for_each_entry(ctlr, &spi_controller_list, list)
+ spi_match_controller_to_boardinfo(ctlr,
+ &bi->board_info);
mutex_unlock(&board_lock);
}
if (gpio_is_valid(spi->cs_gpio)) {
gpio_set_value(spi->cs_gpio, !enable);
/* Some SPI masters need both GPIO CS & slave_select */
- if ((spi->master->flags & SPI_MASTER_GPIO_SS) &&
- spi->master->set_cs)
- spi->master->set_cs(spi, !enable);
- } else if (spi->master->set_cs) {
- spi->master->set_cs(spi, !enable);
+ if ((spi->controller->flags & SPI_MASTER_GPIO_SS) &&
+ spi->controller->set_cs)
+ spi->controller->set_cs(spi, !enable);
+ } else if (spi->controller->set_cs) {
+ spi->controller->set_cs(spi, !enable);
}
}
#ifdef CONFIG_HAS_DMA
-static int spi_map_buf(struct spi_master *master, struct device *dev,
+static int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
struct sg_table *sgt, void *buf, size_t len,
enum dma_data_direction dir)
{
desc_len = min_t(int, max_seg_size, PAGE_SIZE);
sgs = DIV_ROUND_UP(len + offset_in_page(buf), desc_len);
} else if (virt_addr_valid(buf)) {
- desc_len = min_t(int, max_seg_size, master->max_dma_len);
+ desc_len = min_t(int, max_seg_size, ctlr->max_dma_len);
sgs = DIV_ROUND_UP(len, desc_len);
} else {
return -EINVAL;
return 0;
}
-static void spi_unmap_buf(struct spi_master *master, struct device *dev,
+static void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev,
struct sg_table *sgt, enum dma_data_direction dir)
{
if (sgt->orig_nents) {
}
}
-static int __spi_map_msg(struct spi_master *master, struct spi_message *msg)
+static int __spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg)
{
struct device *tx_dev, *rx_dev;
struct spi_transfer *xfer;
int ret;
- if (!master->can_dma)
+ if (!ctlr->can_dma)
return 0;
- if (master->dma_tx)
- tx_dev = master->dma_tx->device->dev;
+ if (ctlr->dma_tx)
+ tx_dev = ctlr->dma_tx->device->dev;
else
- tx_dev = master->dev.parent;
+ tx_dev = ctlr->dev.parent;
- if (master->dma_rx)
- rx_dev = master->dma_rx->device->dev;
+ if (ctlr->dma_rx)
+ rx_dev = ctlr->dma_rx->device->dev;
else
- rx_dev = master->dev.parent;
+ rx_dev = ctlr->dev.parent;
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
- if (!master->can_dma(master, msg->spi, xfer))
+ if (!ctlr->can_dma(ctlr, msg->spi, xfer))
continue;
if (xfer->tx_buf != NULL) {
- ret = spi_map_buf(master, tx_dev, &xfer->tx_sg,
+ ret = spi_map_buf(ctlr, tx_dev, &xfer->tx_sg,
(void *)xfer->tx_buf, xfer->len,
DMA_TO_DEVICE);
if (ret != 0)
}
if (xfer->rx_buf != NULL) {
- ret = spi_map_buf(master, rx_dev, &xfer->rx_sg,
+ ret = spi_map_buf(ctlr, rx_dev, &xfer->rx_sg,
xfer->rx_buf, xfer->len,
DMA_FROM_DEVICE);
if (ret != 0) {
- spi_unmap_buf(master, tx_dev, &xfer->tx_sg,
+ spi_unmap_buf(ctlr, tx_dev, &xfer->tx_sg,
DMA_TO_DEVICE);
return ret;
}
}
}
- master->cur_msg_mapped = true;
+ ctlr->cur_msg_mapped = true;
return 0;
}
-static int __spi_unmap_msg(struct spi_master *master, struct spi_message *msg)
+static int __spi_unmap_msg(struct spi_controller *ctlr, struct spi_message *msg)
{
struct spi_transfer *xfer;
struct device *tx_dev, *rx_dev;
- if (!master->cur_msg_mapped || !master->can_dma)
+ if (!ctlr->cur_msg_mapped || !ctlr->can_dma)
return 0;
- if (master->dma_tx)
- tx_dev = master->dma_tx->device->dev;
+ if (ctlr->dma_tx)
+ tx_dev = ctlr->dma_tx->device->dev;
else
- tx_dev = master->dev.parent;
+ tx_dev = ctlr->dev.parent;
- if (master->dma_rx)
- rx_dev = master->dma_rx->device->dev;
+ if (ctlr->dma_rx)
+ rx_dev = ctlr->dma_rx->device->dev;
else
- rx_dev = master->dev.parent;
+ rx_dev = ctlr->dev.parent;
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
- if (!master->can_dma(master, msg->spi, xfer))
+ if (!ctlr->can_dma(ctlr, msg->spi, xfer))
continue;
- spi_unmap_buf(master, rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE);
- spi_unmap_buf(master, tx_dev, &xfer->tx_sg, DMA_TO_DEVICE);
+ spi_unmap_buf(ctlr, rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE);
+ spi_unmap_buf(ctlr, tx_dev, &xfer->tx_sg, DMA_TO_DEVICE);
}
return 0;
}
#else /* !CONFIG_HAS_DMA */
-static inline int spi_map_buf(struct spi_master *master,
- struct device *dev, struct sg_table *sgt,
- void *buf, size_t len,
+static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
+ struct sg_table *sgt, void *buf, size_t len,
enum dma_data_direction dir)
{
return -EINVAL;
}
-static inline void spi_unmap_buf(struct spi_master *master,
+static inline void spi_unmap_buf(struct spi_controller *ctlr,
struct device *dev, struct sg_table *sgt,
enum dma_data_direction dir)
{
}
-static inline int __spi_map_msg(struct spi_master *master,
+static inline int __spi_map_msg(struct spi_controller *ctlr,
struct spi_message *msg)
{
return 0;
}
-static inline int __spi_unmap_msg(struct spi_master *master,
+static inline int __spi_unmap_msg(struct spi_controller *ctlr,
struct spi_message *msg)
{
return 0;
}
#endif /* !CONFIG_HAS_DMA */
-static inline int spi_unmap_msg(struct spi_master *master,
+static inline int spi_unmap_msg(struct spi_controller *ctlr,
struct spi_message *msg)
{
struct spi_transfer *xfer;
* Restore the original value of tx_buf or rx_buf if they are
* NULL.
*/
- if (xfer->tx_buf == master->dummy_tx)
+ if (xfer->tx_buf == ctlr->dummy_tx)
xfer->tx_buf = NULL;
- if (xfer->rx_buf == master->dummy_rx)
+ if (xfer->rx_buf == ctlr->dummy_rx)
xfer->rx_buf = NULL;
}
- return __spi_unmap_msg(master, msg);
+ return __spi_unmap_msg(ctlr, msg);
}
-static int spi_map_msg(struct spi_master *master, struct spi_message *msg)
+static int spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg)
{
struct spi_transfer *xfer;
void *tmp;
unsigned int max_tx, max_rx;
- if (master->flags & (SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX)) {
+ if (ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) {
max_tx = 0;
max_rx = 0;
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
- if ((master->flags & SPI_MASTER_MUST_TX) &&
+ if ((ctlr->flags & SPI_CONTROLLER_MUST_TX) &&
!xfer->tx_buf)
max_tx = max(xfer->len, max_tx);
- if ((master->flags & SPI_MASTER_MUST_RX) &&
+ if ((ctlr->flags & SPI_CONTROLLER_MUST_RX) &&
!xfer->rx_buf)
max_rx = max(xfer->len, max_rx);
}
if (max_tx) {
- tmp = krealloc(master->dummy_tx, max_tx,
+ tmp = krealloc(ctlr->dummy_tx, max_tx,
GFP_KERNEL | GFP_DMA);
if (!tmp)
return -ENOMEM;
- master->dummy_tx = tmp;
+ ctlr->dummy_tx = tmp;
memset(tmp, 0, max_tx);
}
if (max_rx) {
- tmp = krealloc(master->dummy_rx, max_rx,
+ tmp = krealloc(ctlr->dummy_rx, max_rx,
GFP_KERNEL | GFP_DMA);
if (!tmp)
return -ENOMEM;
- master->dummy_rx = tmp;
+ ctlr->dummy_rx = tmp;
}
if (max_tx || max_rx) {
list_for_each_entry(xfer, &msg->transfers,
transfer_list) {
if (!xfer->tx_buf)
- xfer->tx_buf = master->dummy_tx;
+ xfer->tx_buf = ctlr->dummy_tx;
if (!xfer->rx_buf)
- xfer->rx_buf = master->dummy_rx;
+ xfer->rx_buf = ctlr->dummy_rx;
}
}
}
- return __spi_map_msg(master, msg);
+ return __spi_map_msg(ctlr, msg);
}
/*
* drivers which implement a transfer_one() operation. It provides
* standard handling of delays and chip select management.
*/
-static int spi_transfer_one_message(struct spi_master *master,
+static int spi_transfer_one_message(struct spi_controller *ctlr,
struct spi_message *msg)
{
struct spi_transfer *xfer;
bool keep_cs = false;
int ret = 0;
unsigned long long ms = 1;
- struct spi_statistics *statm = &master->statistics;
+ struct spi_statistics *statm = &ctlr->statistics;
struct spi_statistics *stats = &msg->spi->statistics;
spi_set_cs(msg->spi, true);
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
trace_spi_transfer_start(msg, xfer);
- spi_statistics_add_transfer_stats(statm, xfer, master);
- spi_statistics_add_transfer_stats(stats, xfer, master);
+ spi_statistics_add_transfer_stats(statm, xfer, ctlr);
+ spi_statistics_add_transfer_stats(stats, xfer, ctlr);
if (xfer->tx_buf || xfer->rx_buf) {
- reinit_completion(&master->xfer_completion);
+ reinit_completion(&ctlr->xfer_completion);
- ret = master->transfer_one(master, msg->spi, xfer);
+ ret = ctlr->transfer_one(ctlr, msg->spi, xfer);
if (ret < 0) {
SPI_STATISTICS_INCREMENT_FIELD(statm,
errors);
if (ms > UINT_MAX)
ms = UINT_MAX;
- ms = wait_for_completion_timeout(&master->xfer_completion,
+ ms = wait_for_completion_timeout(&ctlr->xfer_completion,
msecs_to_jiffies(ms));
}
if (msg->status == -EINPROGRESS)
msg->status = ret;
- if (msg->status && master->handle_err)
- master->handle_err(master, msg);
+ if (msg->status && ctlr->handle_err)
+ ctlr->handle_err(ctlr, msg);
- spi_res_release(master, msg);
+ spi_res_release(ctlr, msg);
- spi_finalize_current_message(master);
+ spi_finalize_current_message(ctlr);
return ret;
}
/**
* spi_finalize_current_transfer - report completion of a transfer
- * @master: the master reporting completion
+ * @ctlr: the controller reporting completion
*
* Called by SPI drivers using the core transfer_one_message()
* implementation to notify it that the current interrupt driven
* transfer has finished and the next one may be scheduled.
*/
-void spi_finalize_current_transfer(struct spi_master *master)
+void spi_finalize_current_transfer(struct spi_controller *ctlr)
{
- complete(&master->xfer_completion);
+ complete(&ctlr->xfer_completion);
}
EXPORT_SYMBOL_GPL(spi_finalize_current_transfer);
/**
* __spi_pump_messages - function which processes spi message queue
- * @master: master to process queue for
+ * @ctlr: controller to process queue for
* @in_kthread: true if we are in the context of the message pump thread
*
* This function checks if there is any spi message in the queue that
* inside spi_sync(); the queue extraction handling at the top of the
* function should deal with this safely.
*/
-static void __spi_pump_messages(struct spi_master *master, bool in_kthread)
+static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
{
unsigned long flags;
bool was_busy = false;
int ret;
/* Lock queue */
- spin_lock_irqsave(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
/* Make sure we are not already running a message */
- if (master->cur_msg) {
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ if (ctlr->cur_msg) {
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return;
}
/* If another context is idling the device then defer */
- if (master->idling) {
- kthread_queue_work(&master->kworker, &master->pump_messages);
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ if (ctlr->idling) {
+ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages);
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return;
}
/* Check if the queue is idle */
- if (list_empty(&master->queue) || !master->running) {
- if (!master->busy) {
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ if (list_empty(&ctlr->queue) || !ctlr->running) {
+ if (!ctlr->busy) {
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return;
}
/* Only do teardown in the thread */
if (!in_kthread) {
- kthread_queue_work(&master->kworker,
- &master->pump_messages);
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ kthread_queue_work(&ctlr->kworker,
+ &ctlr->pump_messages);
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return;
}
- master->busy = false;
- master->idling = true;
- spin_unlock_irqrestore(&master->queue_lock, flags);
-
- kfree(master->dummy_rx);
- master->dummy_rx = NULL;
- kfree(master->dummy_tx);
- master->dummy_tx = NULL;
- if (master->unprepare_transfer_hardware &&
- master->unprepare_transfer_hardware(master))
- dev_err(&master->dev,
+ ctlr->busy = false;
+ ctlr->idling = true;
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
+
+ kfree(ctlr->dummy_rx);
+ ctlr->dummy_rx = NULL;
+ kfree(ctlr->dummy_tx);
+ ctlr->dummy_tx = NULL;
+ if (ctlr->unprepare_transfer_hardware &&
+ ctlr->unprepare_transfer_hardware(ctlr))
+ dev_err(&ctlr->dev,
"failed to unprepare transfer hardware\n");
- if (master->auto_runtime_pm) {
- pm_runtime_mark_last_busy(master->dev.parent);
- pm_runtime_put_autosuspend(master->dev.parent);
+ if (ctlr->auto_runtime_pm) {
+ pm_runtime_mark_last_busy(ctlr->dev.parent);
+ pm_runtime_put_autosuspend(ctlr->dev.parent);
}
- trace_spi_master_idle(master);
+ trace_spi_controller_idle(ctlr);
- spin_lock_irqsave(&master->queue_lock, flags);
- master->idling = false;
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
+ ctlr->idling = false;
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return;
}
/* Extract head of queue */
- master->cur_msg =
- list_first_entry(&master->queue, struct spi_message, queue);
+ ctlr->cur_msg =
+ list_first_entry(&ctlr->queue, struct spi_message, queue);
- list_del_init(&master->cur_msg->queue);
- if (master->busy)
+ list_del_init(&ctlr->cur_msg->queue);
+ if (ctlr->busy)
was_busy = true;
else
- master->busy = true;
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ ctlr->busy = true;
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
- mutex_lock(&master->io_mutex);
+ mutex_lock(&ctlr->io_mutex);
- if (!was_busy && master->auto_runtime_pm) {
- ret = pm_runtime_get_sync(master->dev.parent);
+ if (!was_busy && ctlr->auto_runtime_pm) {
+ ret = pm_runtime_get_sync(ctlr->dev.parent);
if (ret < 0) {
- dev_err(&master->dev, "Failed to power device: %d\n",
+ dev_err(&ctlr->dev, "Failed to power device: %d\n",
ret);
- mutex_unlock(&master->io_mutex);
+ mutex_unlock(&ctlr->io_mutex);
return;
}
}
if (!was_busy)
- trace_spi_master_busy(master);
+ trace_spi_controller_busy(ctlr);
- if (!was_busy && master->prepare_transfer_hardware) {
- ret = master->prepare_transfer_hardware(master);
+ if (!was_busy && ctlr->prepare_transfer_hardware) {
+ ret = ctlr->prepare_transfer_hardware(ctlr);
if (ret) {
- dev_err(&master->dev,
+ dev_err(&ctlr->dev,
"failed to prepare transfer hardware\n");
- if (master->auto_runtime_pm)
- pm_runtime_put(master->dev.parent);
- mutex_unlock(&master->io_mutex);
+ if (ctlr->auto_runtime_pm)
+ pm_runtime_put(ctlr->dev.parent);
+ mutex_unlock(&ctlr->io_mutex);
return;
}
}
- trace_spi_message_start(master->cur_msg);
+ trace_spi_message_start(ctlr->cur_msg);
- if (master->prepare_message) {
- ret = master->prepare_message(master, master->cur_msg);
+ if (ctlr->prepare_message) {
+ ret = ctlr->prepare_message(ctlr, ctlr->cur_msg);
if (ret) {
- dev_err(&master->dev,
- "failed to prepare message: %d\n", ret);
- master->cur_msg->status = ret;
- spi_finalize_current_message(master);
+ dev_err(&ctlr->dev, "failed to prepare message: %d\n",
+ ret);
+ ctlr->cur_msg->status = ret;
+ spi_finalize_current_message(ctlr);
goto out;
}
- master->cur_msg_prepared = true;
+ ctlr->cur_msg_prepared = true;
}
- ret = spi_map_msg(master, master->cur_msg);
+ ret = spi_map_msg(ctlr, ctlr->cur_msg);
if (ret) {
- master->cur_msg->status = ret;
- spi_finalize_current_message(master);
+ ctlr->cur_msg->status = ret;
+ spi_finalize_current_message(ctlr);
goto out;
}
- ret = master->transfer_one_message(master, master->cur_msg);
+ ret = ctlr->transfer_one_message(ctlr, ctlr->cur_msg);
if (ret) {
- dev_err(&master->dev,
+ dev_err(&ctlr->dev,
"failed to transfer one message from queue\n");
goto out;
}
out:
- mutex_unlock(&master->io_mutex);
+ mutex_unlock(&ctlr->io_mutex);
/* Prod the scheduler in case transfer_one() was busy waiting */
if (!ret)
/**
* spi_pump_messages - kthread work function which processes spi message queue
- * @work: pointer to kthread work struct contained in the master struct
+ * @work: pointer to kthread work struct contained in the controller struct
*/
static void spi_pump_messages(struct kthread_work *work)
{
- struct spi_master *master =
- container_of(work, struct spi_master, pump_messages);
+ struct spi_controller *ctlr =
+ container_of(work, struct spi_controller, pump_messages);
- __spi_pump_messages(master, true);
+ __spi_pump_messages(ctlr, true);
}
-static int spi_init_queue(struct spi_master *master)
+static int spi_init_queue(struct spi_controller *ctlr)
{
struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
- master->running = false;
- master->busy = false;
+ ctlr->running = false;
+ ctlr->busy = false;
- kthread_init_worker(&master->kworker);
- master->kworker_task = kthread_run(kthread_worker_fn,
- &master->kworker, "%s",
- dev_name(&master->dev));
- if (IS_ERR(master->kworker_task)) {
- dev_err(&master->dev, "failed to create message pump task\n");
- return PTR_ERR(master->kworker_task);
+ kthread_init_worker(&ctlr->kworker);
+ ctlr->kworker_task = kthread_run(kthread_worker_fn, &ctlr->kworker,
+ "%s", dev_name(&ctlr->dev));
+ if (IS_ERR(ctlr->kworker_task)) {
+ dev_err(&ctlr->dev, "failed to create message pump task\n");
+ return PTR_ERR(ctlr->kworker_task);
}
- kthread_init_work(&master->pump_messages, spi_pump_messages);
+ kthread_init_work(&ctlr->pump_messages, spi_pump_messages);
/*
- * Master config will indicate if this controller should run the
+ * Controller config will indicate if this controller should run the
* message pump with high (realtime) priority to reduce the transfer
* latency on the bus by minimising the delay between a transfer
* request and the scheduling of the message pump thread. Without this
* setting the message pump thread will remain at default priority.
*/
- if (master->rt) {
- dev_info(&master->dev,
+ if (ctlr->rt) {
+ dev_info(&ctlr->dev,
"will run message pump with realtime priority\n");
- sched_setscheduler(master->kworker_task, SCHED_FIFO, ¶m);
+ sched_setscheduler(ctlr->kworker_task, SCHED_FIFO, ¶m);
}
return 0;
/**
* spi_get_next_queued_message() - called by driver to check for queued
* messages
- * @master: the master to check for queued messages
+ * @ctlr: the controller to check for queued messages
*
* If there are more messages in the queue, the next message is returned from
* this call.
*
* Return: the next message in the queue, else NULL if the queue is empty.
*/
-struct spi_message *spi_get_next_queued_message(struct spi_master *master)
+struct spi_message *spi_get_next_queued_message(struct spi_controller *ctlr)
{
struct spi_message *next;
unsigned long flags;
/* get a pointer to the next message, if any */
- spin_lock_irqsave(&master->queue_lock, flags);
- next = list_first_entry_or_null(&master->queue, struct spi_message,
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
+ next = list_first_entry_or_null(&ctlr->queue, struct spi_message,
queue);
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return next;
}
/**
* spi_finalize_current_message() - the current message is complete
- * @master: the master to return the message to
+ * @ctlr: the controller to return the message to
*
* Called by the driver to notify the core that the message in the front of the
* queue is complete and can be removed from the queue.
*/
-void spi_finalize_current_message(struct spi_master *master)
+void spi_finalize_current_message(struct spi_controller *ctlr)
{
struct spi_message *mesg;
unsigned long flags;
int ret;
- spin_lock_irqsave(&master->queue_lock, flags);
- mesg = master->cur_msg;
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
+ mesg = ctlr->cur_msg;
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
- spi_unmap_msg(master, mesg);
+ spi_unmap_msg(ctlr, mesg);
- if (master->cur_msg_prepared && master->unprepare_message) {
- ret = master->unprepare_message(master, mesg);
+ if (ctlr->cur_msg_prepared && ctlr->unprepare_message) {
+ ret = ctlr->unprepare_message(ctlr, mesg);
if (ret) {
- dev_err(&master->dev,
- "failed to unprepare message: %d\n", ret);
+ dev_err(&ctlr->dev, "failed to unprepare message: %d\n",
+ ret);
}
}
- spin_lock_irqsave(&master->queue_lock, flags);
- master->cur_msg = NULL;
- master->cur_msg_prepared = false;
- kthread_queue_work(&master->kworker, &master->pump_messages);
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
+ ctlr->cur_msg = NULL;
+ ctlr->cur_msg_prepared = false;
+ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages);
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
trace_spi_message_done(mesg);
}
EXPORT_SYMBOL_GPL(spi_finalize_current_message);
-static int spi_start_queue(struct spi_master *master)
+static int spi_start_queue(struct spi_controller *ctlr)
{
unsigned long flags;
- spin_lock_irqsave(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
- if (master->running || master->busy) {
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ if (ctlr->running || ctlr->busy) {
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return -EBUSY;
}
- master->running = true;
- master->cur_msg = NULL;
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ ctlr->running = true;
+ ctlr->cur_msg = NULL;
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
- kthread_queue_work(&master->kworker, &master->pump_messages);
+ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages);
return 0;
}
-static int spi_stop_queue(struct spi_master *master)
+static int spi_stop_queue(struct spi_controller *ctlr)
{
unsigned long flags;
unsigned limit = 500;
int ret = 0;
- spin_lock_irqsave(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
/*
* This is a bit lame, but is optimized for the common execution path.
- * A wait_queue on the master->busy could be used, but then the common
+ * A wait_queue on the ctlr->busy could be used, but then the common
* execution path (pump_messages) would be required to call wake_up or
* friends on every SPI message. Do this instead.
*/
- while ((!list_empty(&master->queue) || master->busy) && limit--) {
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ while ((!list_empty(&ctlr->queue) || ctlr->busy) && limit--) {
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
usleep_range(10000, 11000);
- spin_lock_irqsave(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
}
- if (!list_empty(&master->queue) || master->busy)
+ if (!list_empty(&ctlr->queue) || ctlr->busy)
ret = -EBUSY;
else
- master->running = false;
+ ctlr->running = false;
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
if (ret) {
- dev_warn(&master->dev,
- "could not stop message queue\n");
+ dev_warn(&ctlr->dev, "could not stop message queue\n");
return ret;
}
return ret;
}
-static int spi_destroy_queue(struct spi_master *master)
+static int spi_destroy_queue(struct spi_controller *ctlr)
{
int ret;
- ret = spi_stop_queue(master);
+ ret = spi_stop_queue(ctlr);
/*
* kthread_flush_worker will block until all work is done.
* return anyway.
*/
if (ret) {
- dev_err(&master->dev, "problem destroying queue\n");
+ dev_err(&ctlr->dev, "problem destroying queue\n");
return ret;
}
- kthread_flush_worker(&master->kworker);
- kthread_stop(master->kworker_task);
+ kthread_flush_worker(&ctlr->kworker);
+ kthread_stop(ctlr->kworker_task);
return 0;
}
struct spi_message *msg,
bool need_pump)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
unsigned long flags;
- spin_lock_irqsave(&master->queue_lock, flags);
+ spin_lock_irqsave(&ctlr->queue_lock, flags);
- if (!master->running) {
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ if (!ctlr->running) {
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return -ESHUTDOWN;
}
msg->actual_length = 0;
msg->status = -EINPROGRESS;
- list_add_tail(&msg->queue, &master->queue);
- if (!master->busy && need_pump)
- kthread_queue_work(&master->kworker, &master->pump_messages);
+ list_add_tail(&msg->queue, &ctlr->queue);
+ if (!ctlr->busy && need_pump)
+ kthread_queue_work(&ctlr->kworker, &ctlr->pump_messages);
- spin_unlock_irqrestore(&master->queue_lock, flags);
+ spin_unlock_irqrestore(&ctlr->queue_lock, flags);
return 0;
}
return __spi_queued_transfer(spi, msg, true);
}
-static int spi_master_initialize_queue(struct spi_master *master)
+static int spi_controller_initialize_queue(struct spi_controller *ctlr)
{
int ret;
- master->transfer = spi_queued_transfer;
- if (!master->transfer_one_message)
- master->transfer_one_message = spi_transfer_one_message;
+ ctlr->transfer = spi_queued_transfer;
+ if (!ctlr->transfer_one_message)
+ ctlr->transfer_one_message = spi_transfer_one_message;
/* Initialize and start queue */
- ret = spi_init_queue(master);
+ ret = spi_init_queue(ctlr);
if (ret) {
- dev_err(&master->dev, "problem initializing queue\n");
+ dev_err(&ctlr->dev, "problem initializing queue\n");
goto err_init_queue;
}
- master->queued = true;
- ret = spi_start_queue(master);
+ ctlr->queued = true;
+ ret = spi_start_queue(ctlr);
if (ret) {
- dev_err(&master->dev, "problem starting queue\n");
+ dev_err(&ctlr->dev, "problem starting queue\n");
goto err_start_queue;
}
return 0;
err_start_queue:
- spi_destroy_queue(master);
+ spi_destroy_queue(ctlr);
err_init_queue:
return ret;
}
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_OF)
-static int of_spi_parse_dt(struct spi_master *master, struct spi_device *spi,
+static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
struct device_node *nc)
{
u32 value;
int rc;
- /* Device address */
- rc = of_property_read_u32(nc, "reg", &value);
- if (rc) {
- dev_err(&master->dev, "%s has no valid 'reg' property (%d)\n",
- nc->full_name, rc);
- return rc;
- }
- spi->chip_select = value;
-
/* Mode (clock phase/polarity/etc.) */
if (of_find_property(nc, "spi-cpha", NULL))
spi->mode |= SPI_CPHA;
spi->mode |= SPI_TX_QUAD;
break;
default:
- dev_warn(&master->dev,
+ dev_warn(&ctlr->dev,
"spi-tx-bus-width %d not supported\n",
value);
break;
spi->mode |= SPI_RX_QUAD;
break;
default:
- dev_warn(&master->dev,
+ dev_warn(&ctlr->dev,
"spi-rx-bus-width %d not supported\n",
value);
break;
}
}
+ if (spi_controller_is_slave(ctlr)) {
+ if (strcmp(nc->name, "slave")) {
+ dev_err(&ctlr->dev, "%s is not called 'slave'\n",
+ nc->full_name);
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ /* Device address */
+ rc = of_property_read_u32(nc, "reg", &value);
+ if (rc) {
+ dev_err(&ctlr->dev, "%s has no valid 'reg' property (%d)\n",
+ nc->full_name, rc);
+ return rc;
+ }
+ spi->chip_select = value;
+
/* Device speed */
rc = of_property_read_u32(nc, "spi-max-frequency", &value);
if (rc) {
- dev_err(&master->dev, "%s has no valid 'spi-max-frequency' property (%d)\n",
+ dev_err(&ctlr->dev,
+ "%s has no valid 'spi-max-frequency' property (%d)\n",
nc->full_name, rc);
return rc;
}
}
static struct spi_device *
-of_register_spi_device(struct spi_master *master, struct device_node *nc)
+of_register_spi_device(struct spi_controller *ctlr, struct device_node *nc)
{
struct spi_device *spi;
int rc;
/* Alloc an spi_device */
- spi = spi_alloc_device(master);
+ spi = spi_alloc_device(ctlr);
if (!spi) {
- dev_err(&master->dev, "spi_device alloc error for %s\n",
+ dev_err(&ctlr->dev, "spi_device alloc error for %s\n",
nc->full_name);
rc = -ENOMEM;
goto err_out;
rc = of_modalias_node(nc, spi->modalias,
sizeof(spi->modalias));
if (rc < 0) {
- dev_err(&master->dev, "cannot find modalias for %s\n",
+ dev_err(&ctlr->dev, "cannot find modalias for %s\n",
nc->full_name);
goto err_out;
}
- rc = of_spi_parse_dt(master, spi, nc);
+ rc = of_spi_parse_dt(ctlr, spi, nc);
if (rc)
goto err_out;
/* Register the new device */
rc = spi_add_device(spi);
if (rc) {
- dev_err(&master->dev, "spi_device register error %s\n",
+ dev_err(&ctlr->dev, "spi_device register error %s\n",
nc->full_name);
goto err_of_node_put;
}
/**
* of_register_spi_devices() - Register child devices onto the SPI bus
- * @master: Pointer to spi_master device
+ * @ctlr: Pointer to spi_controller device
*
- * Registers an spi_device for each child node of master node which has a 'reg'
- * property.
+ * Registers an spi_device for each child node of controller node which
+ * represents a valid SPI slave.
*/
-static void of_register_spi_devices(struct spi_master *master)
+static void of_register_spi_devices(struct spi_controller *ctlr)
{
struct spi_device *spi;
struct device_node *nc;
- if (!master->dev.of_node)
+ if (!ctlr->dev.of_node)
return;
- for_each_available_child_of_node(master->dev.of_node, nc) {
+ for_each_available_child_of_node(ctlr->dev.of_node, nc) {
if (of_node_test_and_set_flag(nc, OF_POPULATED))
continue;
- spi = of_register_spi_device(master, nc);
+ spi = of_register_spi_device(ctlr, nc);
if (IS_ERR(spi)) {
- dev_warn(&master->dev, "Failed to create SPI device for %s\n",
- nc->full_name);
+ dev_warn(&ctlr->dev,
+ "Failed to create SPI device for %s\n",
+ nc->full_name);
of_node_clear_flag(nc, OF_POPULATED);
}
}
}
#else
-static void of_register_spi_devices(struct spi_master *master) { }
+static void of_register_spi_devices(struct spi_controller *ctlr) { }
#endif
#ifdef CONFIG_ACPI
static int acpi_spi_add_resource(struct acpi_resource *ares, void *data)
{
struct spi_device *spi = data;
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
struct acpi_resource_spi_serialbus *sb;
* 0 .. max - 1 so we need to ask the driver to
* translate between the two schemes.
*/
- if (master->fw_translate_cs) {
- int cs = master->fw_translate_cs(master,
+ if (ctlr->fw_translate_cs) {
+ int cs = ctlr->fw_translate_cs(ctlr,
sb->device_selection);
if (cs < 0)
return cs;
return 1;
}
-static acpi_status acpi_register_spi_device(struct spi_master *master,
+static acpi_status acpi_register_spi_device(struct spi_controller *ctlr,
struct acpi_device *adev)
{
struct list_head resource_list;
acpi_device_enumerated(adev))
return AE_OK;
- spi = spi_alloc_device(master);
+ spi = spi_alloc_device(ctlr);
if (!spi) {
- dev_err(&master->dev, "failed to allocate SPI device for %s\n",
+ dev_err(&ctlr->dev, "failed to allocate SPI device for %s\n",
dev_name(&adev->dev));
return AE_NO_MEMORY;
}
adev->power.flags.ignore_parent = true;
if (spi_add_device(spi)) {
adev->power.flags.ignore_parent = false;
- dev_err(&master->dev, "failed to add SPI device %s from ACPI\n",
+ dev_err(&ctlr->dev, "failed to add SPI device %s from ACPI\n",
dev_name(&adev->dev));
spi_dev_put(spi);
}
static acpi_status acpi_spi_add_device(acpi_handle handle, u32 level,
void *data, void **return_value)
{
- struct spi_master *master = data;
+ struct spi_controller *ctlr = data;
struct acpi_device *adev;
if (acpi_bus_get_device(handle, &adev))
return AE_OK;
- return acpi_register_spi_device(master, adev);
+ return acpi_register_spi_device(ctlr, adev);
}
-static void acpi_register_spi_devices(struct spi_master *master)
+static void acpi_register_spi_devices(struct spi_controller *ctlr)
{
acpi_status status;
acpi_handle handle;
- handle = ACPI_HANDLE(master->dev.parent);
+ handle = ACPI_HANDLE(ctlr->dev.parent);
if (!handle)
return;
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
- acpi_spi_add_device, NULL,
- master, NULL);
+ acpi_spi_add_device, NULL, ctlr, NULL);
if (ACPI_FAILURE(status))
- dev_warn(&master->dev, "failed to enumerate SPI slaves\n");
+ dev_warn(&ctlr->dev, "failed to enumerate SPI slaves\n");
}
#else
-static inline void acpi_register_spi_devices(struct spi_master *master) {}
+static inline void acpi_register_spi_devices(struct spi_controller *ctlr) {}
#endif /* CONFIG_ACPI */
-static void spi_master_release(struct device *dev)
+static void spi_controller_release(struct device *dev)
{
- struct spi_master *master;
+ struct spi_controller *ctlr;
- master = container_of(dev, struct spi_master, dev);
- kfree(master);
+ ctlr = container_of(dev, struct spi_controller, dev);
+ kfree(ctlr);
}
static struct class spi_master_class = {
.name = "spi_master",
.owner = THIS_MODULE,
- .dev_release = spi_master_release,
+ .dev_release = spi_controller_release,
.dev_groups = spi_master_groups,
};
+#ifdef CONFIG_SPI_SLAVE
+/**
+ * spi_slave_abort - abort the ongoing transfer request on an SPI slave
+ * controller
+ * @spi: device used for the current transfer
+ */
+int spi_slave_abort(struct spi_device *spi)
+{
+ struct spi_controller *ctlr = spi->controller;
+
+ if (spi_controller_is_slave(ctlr) && ctlr->slave_abort)
+ return ctlr->slave_abort(ctlr);
+
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(spi_slave_abort);
+
+static int match_true(struct device *dev, void *data)
+{
+ return 1;
+}
+
+static ssize_t spi_slave_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct spi_controller *ctlr = container_of(dev, struct spi_controller,
+ dev);
+ struct device *child;
+
+ child = device_find_child(&ctlr->dev, NULL, match_true);
+ return sprintf(buf, "%s\n",
+ child ? to_spi_device(child)->modalias : NULL);
+}
+
+static ssize_t spi_slave_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct spi_controller *ctlr = container_of(dev, struct spi_controller,
+ dev);
+ struct spi_device *spi;
+ struct device *child;
+ char name[32];
+ int rc;
+
+ rc = sscanf(buf, "%31s", name);
+ if (rc != 1 || !name[0])
+ return -EINVAL;
+
+ child = device_find_child(&ctlr->dev, NULL, match_true);
+ if (child) {
+ /* Remove registered slave */
+ device_unregister(child);
+ put_device(child);
+ }
+
+ if (strcmp(name, "(null)")) {
+ /* Register new slave */
+ spi = spi_alloc_device(ctlr);
+ if (!spi)
+ return -ENOMEM;
+
+ strlcpy(spi->modalias, name, sizeof(spi->modalias));
+
+ rc = spi_add_device(spi);
+ if (rc) {
+ spi_dev_put(spi);
+ return rc;
+ }
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(slave, 0644, spi_slave_show, spi_slave_store);
+
+static struct attribute *spi_slave_attrs[] = {
+ &dev_attr_slave.attr,
+ NULL,
+};
+
+static const struct attribute_group spi_slave_group = {
+ .attrs = spi_slave_attrs,
+};
+
+static const struct attribute_group *spi_slave_groups[] = {
+ &spi_controller_statistics_group,
+ &spi_slave_group,
+ NULL,
+};
+
+static struct class spi_slave_class = {
+ .name = "spi_slave",
+ .owner = THIS_MODULE,
+ .dev_release = spi_controller_release,
+ .dev_groups = spi_slave_groups,
+};
+#else
+extern struct class spi_slave_class; /* dummy */
+#endif
/**
- * spi_alloc_master - allocate SPI master controller
+ * __spi_alloc_controller - allocate an SPI master or slave controller
* @dev: the controller, possibly using the platform_bus
* @size: how much zeroed driver-private data to allocate; the pointer to this
* memory is in the driver_data field of the returned device,
- * accessible with spi_master_get_devdata().
+ * accessible with spi_controller_get_devdata().
+ * @slave: flag indicating whether to allocate an SPI master (false) or SPI
+ * slave (true) controller
* Context: can sleep
*
- * This call is used only by SPI master controller drivers, which are the
+ * This call is used only by SPI controller drivers, which are the
* only ones directly touching chip registers. It's how they allocate
- * an spi_master structure, prior to calling spi_register_master().
+ * an spi_controller structure, prior to calling spi_register_controller().
*
* This must be called from context that can sleep.
*
- * The caller is responsible for assigning the bus number and initializing
- * the master's methods before calling spi_register_master(); and (after errors
- * adding the device) calling spi_master_put() to prevent a memory leak.
+ * The caller is responsible for assigning the bus number and initializing the
+ * controller's methods before calling spi_register_controller(); and (after
+ * errors adding the device) calling spi_controller_put() to prevent a memory
+ * leak.
*
- * Return: the SPI master structure on success, else NULL.
+ * Return: the SPI controller structure on success, else NULL.
*/
-struct spi_master *spi_alloc_master(struct device *dev, unsigned size)
+struct spi_controller *__spi_alloc_controller(struct device *dev,
+ unsigned int size, bool slave)
{
- struct spi_master *master;
+ struct spi_controller *ctlr;
if (!dev)
return NULL;
- master = kzalloc(size + sizeof(*master), GFP_KERNEL);
- if (!master)
+ ctlr = kzalloc(size + sizeof(*ctlr), GFP_KERNEL);
+ if (!ctlr)
return NULL;
- device_initialize(&master->dev);
- master->bus_num = -1;
- master->num_chipselect = 1;
- master->dev.class = &spi_master_class;
- master->dev.parent = dev;
- pm_suspend_ignore_children(&master->dev, true);
- spi_master_set_devdata(master, &master[1]);
+ device_initialize(&ctlr->dev);
+ ctlr->bus_num = -1;
+ ctlr->num_chipselect = 1;
+ ctlr->slave = slave;
+ if (IS_ENABLED(CONFIG_SPI_SLAVE) && slave)
+ ctlr->dev.class = &spi_slave_class;
+ else
+ ctlr->dev.class = &spi_master_class;
+ ctlr->dev.parent = dev;
+ pm_suspend_ignore_children(&ctlr->dev, true);
+ spi_controller_set_devdata(ctlr, &ctlr[1]);
- return master;
+ return ctlr;
}
-EXPORT_SYMBOL_GPL(spi_alloc_master);
+EXPORT_SYMBOL_GPL(__spi_alloc_controller);
#ifdef CONFIG_OF
-static int of_spi_register_master(struct spi_master *master)
+static int of_spi_register_master(struct spi_controller *ctlr)
{
int nb, i, *cs;
- struct device_node *np = master->dev.of_node;
+ struct device_node *np = ctlr->dev.of_node;
if (!np)
return 0;
nb = of_gpio_named_count(np, "cs-gpios");
- master->num_chipselect = max_t(int, nb, master->num_chipselect);
+ ctlr->num_chipselect = max_t(int, nb, ctlr->num_chipselect);
/* Return error only for an incorrectly formed cs-gpios property */
if (nb == 0 || nb == -ENOENT)
else if (nb < 0)
return nb;
- cs = devm_kzalloc(&master->dev,
- sizeof(int) * master->num_chipselect,
+ cs = devm_kzalloc(&ctlr->dev, sizeof(int) * ctlr->num_chipselect,
GFP_KERNEL);
- master->cs_gpios = cs;
+ ctlr->cs_gpios = cs;
- if (!master->cs_gpios)
+ if (!ctlr->cs_gpios)
return -ENOMEM;
- for (i = 0; i < master->num_chipselect; i++)
+ for (i = 0; i < ctlr->num_chipselect; i++)
cs[i] = -ENOENT;
for (i = 0; i < nb; i++)
return 0;
}
#else
-static int of_spi_register_master(struct spi_master *master)
+static int of_spi_register_master(struct spi_controller *ctlr)
{
return 0;
}
#endif
/**
- * spi_register_master - register SPI master controller
- * @master: initialized master, originally from spi_alloc_master()
+ * spi_register_controller - register SPI master or slave controller
+ * @ctlr: initialized master, originally from spi_alloc_master() or
+ * spi_alloc_slave()
* Context: can sleep
*
- * SPI master controllers connect to their drivers using some non-SPI bus,
+ * SPI controllers connect to their drivers using some non-SPI bus,
* such as the platform bus. The final stage of probe() in that code
- * includes calling spi_register_master() to hook up to this SPI bus glue.
+ * includes calling spi_register_controller() to hook up to this SPI bus glue.
*
* SPI controllers use board specific (often SOC specific) bus numbers,
* and board-specific addressing for SPI devices combines those numbers
* chip is at which address.
*
* This must be called from context that can sleep. It returns zero on
- * success, else a negative error code (dropping the master's refcount).
+ * success, else a negative error code (dropping the controller's refcount).
* After a successful return, the caller is responsible for calling
- * spi_unregister_master().
+ * spi_unregister_controller().
*
* Return: zero on success, else a negative error code.
*/
-int spi_register_master(struct spi_master *master)
+int spi_register_controller(struct spi_controller *ctlr)
{
static atomic_t dyn_bus_id = ATOMIC_INIT((1<<15) - 1);
- struct device *dev = master->dev.parent;
+ struct device *dev = ctlr->dev.parent;
struct boardinfo *bi;
int status = -ENODEV;
int dynamic = 0;
if (!dev)
return -ENODEV;
- status = of_spi_register_master(master);
- if (status)
- return status;
+ if (!spi_controller_is_slave(ctlr)) {
+ status = of_spi_register_master(ctlr);
+ if (status)
+ return status;
+ }
/* even if it's just one always-selected device, there must
* be at least one chipselect
*/
- if (master->num_chipselect == 0)
+ if (ctlr->num_chipselect == 0)
return -EINVAL;
- if ((master->bus_num < 0) && master->dev.of_node)
- master->bus_num = of_alias_get_id(master->dev.of_node, "spi");
+ if ((ctlr->bus_num < 0) && ctlr->dev.of_node)
+ ctlr->bus_num = of_alias_get_id(ctlr->dev.of_node, "spi");
/* convention: dynamically assigned bus IDs count down from the max */
- if (master->bus_num < 0) {
+ if (ctlr->bus_num < 0) {
/* FIXME switch to an IDR based scheme, something like
* I2C now uses, so we can't run out of "dynamic" IDs
*/
- master->bus_num = atomic_dec_return(&dyn_bus_id);
+ ctlr->bus_num = atomic_dec_return(&dyn_bus_id);
dynamic = 1;
}
- INIT_LIST_HEAD(&master->queue);
- spin_lock_init(&master->queue_lock);
- spin_lock_init(&master->bus_lock_spinlock);
- mutex_init(&master->bus_lock_mutex);
- mutex_init(&master->io_mutex);
- master->bus_lock_flag = 0;
- init_completion(&master->xfer_completion);
- if (!master->max_dma_len)
- master->max_dma_len = INT_MAX;
+ INIT_LIST_HEAD(&ctlr->queue);
+ spin_lock_init(&ctlr->queue_lock);
+ spin_lock_init(&ctlr->bus_lock_spinlock);
+ mutex_init(&ctlr->bus_lock_mutex);
+ mutex_init(&ctlr->io_mutex);
+ ctlr->bus_lock_flag = 0;
+ init_completion(&ctlr->xfer_completion);
+ if (!ctlr->max_dma_len)
+ ctlr->max_dma_len = INT_MAX;
/* register the device, then userspace will see it.
* registration fails if the bus ID is in use.
*/
- dev_set_name(&master->dev, "spi%u", master->bus_num);
- status = device_add(&master->dev);
+ dev_set_name(&ctlr->dev, "spi%u", ctlr->bus_num);
+ status = device_add(&ctlr->dev);
if (status < 0)
goto done;
- dev_dbg(dev, "registered master %s%s\n", dev_name(&master->dev),
- dynamic ? " (dynamic)" : "");
+ dev_dbg(dev, "registered %s %s%s\n",
+ spi_controller_is_slave(ctlr) ? "slave" : "master",
+ dev_name(&ctlr->dev), dynamic ? " (dynamic)" : "");
/* If we're using a queued driver, start the queue */
- if (master->transfer)
- dev_info(dev, "master is unqueued, this is deprecated\n");
+ if (ctlr->transfer)
+ dev_info(dev, "controller is unqueued, this is deprecated\n");
else {
- status = spi_master_initialize_queue(master);
+ status = spi_controller_initialize_queue(ctlr);
if (status) {
- device_del(&master->dev);
+ device_del(&ctlr->dev);
goto done;
}
}
/* add statistics */
- spin_lock_init(&master->statistics.lock);
+ spin_lock_init(&ctlr->statistics.lock);
mutex_lock(&board_lock);
- list_add_tail(&master->list, &spi_master_list);
+ list_add_tail(&ctlr->list, &spi_controller_list);
list_for_each_entry(bi, &board_list, list)
- spi_match_master_to_boardinfo(master, &bi->board_info);
+ spi_match_controller_to_boardinfo(ctlr, &bi->board_info);
mutex_unlock(&board_lock);
/* Register devices from the device tree and ACPI */
- of_register_spi_devices(master);
- acpi_register_spi_devices(master);
+ of_register_spi_devices(ctlr);
+ acpi_register_spi_devices(ctlr);
done:
return status;
}
-EXPORT_SYMBOL_GPL(spi_register_master);
+EXPORT_SYMBOL_GPL(spi_register_controller);
static void devm_spi_unregister(struct device *dev, void *res)
{
- spi_unregister_master(*(struct spi_master **)res);
+ spi_unregister_controller(*(struct spi_controller **)res);
}
/**
- * devm_spi_register_master - register managed SPI master controller
- * @dev: device managing SPI master
- * @master: initialized master, originally from spi_alloc_master()
+ * devm_spi_register_controller - register managed SPI master or slave
+ * controller
+ * @dev: device managing SPI controller
+ * @ctlr: initialized controller, originally from spi_alloc_master() or
+ * spi_alloc_slave()
* Context: can sleep
*
- * Register a SPI device as with spi_register_master() which will
+ * Register a SPI device as with spi_register_controller() which will
* automatically be unregister
*
* Return: zero on success, else a negative error code.
*/
-int devm_spi_register_master(struct device *dev, struct spi_master *master)
+int devm_spi_register_controller(struct device *dev,
+ struct spi_controller *ctlr)
{
- struct spi_master **ptr;
+ struct spi_controller **ptr;
int ret;
ptr = devres_alloc(devm_spi_unregister, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return -ENOMEM;
- ret = spi_register_master(master);
+ ret = spi_register_controller(ctlr);
if (!ret) {
- *ptr = master;
+ *ptr = ctlr;
devres_add(dev, ptr);
} else {
devres_free(ptr);
return ret;
}
-EXPORT_SYMBOL_GPL(devm_spi_register_master);
+EXPORT_SYMBOL_GPL(devm_spi_register_controller);
static int __unregister(struct device *dev, void *null)
{
}
/**
- * spi_unregister_master - unregister SPI master controller
- * @master: the master being unregistered
+ * spi_unregister_controller - unregister SPI master or slave controller
+ * @ctlr: the controller being unregistered
* Context: can sleep
*
- * This call is used only by SPI master controller drivers, which are the
+ * This call is used only by SPI controller drivers, which are the
* only ones directly touching chip registers.
*
* This must be called from context that can sleep.
*/
-void spi_unregister_master(struct spi_master *master)
+void spi_unregister_controller(struct spi_controller *ctlr)
{
int dummy;
- if (master->queued) {
- if (spi_destroy_queue(master))
- dev_err(&master->dev, "queue remove failed\n");
+ if (ctlr->queued) {
+ if (spi_destroy_queue(ctlr))
+ dev_err(&ctlr->dev, "queue remove failed\n");
}
mutex_lock(&board_lock);
- list_del(&master->list);
+ list_del(&ctlr->list);
mutex_unlock(&board_lock);
- dummy = device_for_each_child(&master->dev, NULL, __unregister);
- device_unregister(&master->dev);
+ dummy = device_for_each_child(&ctlr->dev, NULL, __unregister);
+ device_unregister(&ctlr->dev);
}
-EXPORT_SYMBOL_GPL(spi_unregister_master);
+EXPORT_SYMBOL_GPL(spi_unregister_controller);
-int spi_master_suspend(struct spi_master *master)
+int spi_controller_suspend(struct spi_controller *ctlr)
{
int ret;
- /* Basically no-ops for non-queued masters */
- if (!master->queued)
+ /* Basically no-ops for non-queued controllers */
+ if (!ctlr->queued)
return 0;
- ret = spi_stop_queue(master);
+ ret = spi_stop_queue(ctlr);
if (ret)
- dev_err(&master->dev, "queue stop failed\n");
+ dev_err(&ctlr->dev, "queue stop failed\n");
return ret;
}
-EXPORT_SYMBOL_GPL(spi_master_suspend);
+EXPORT_SYMBOL_GPL(spi_controller_suspend);
-int spi_master_resume(struct spi_master *master)
+int spi_controller_resume(struct spi_controller *ctlr)
{
int ret;
- if (!master->queued)
+ if (!ctlr->queued)
return 0;
- ret = spi_start_queue(master);
+ ret = spi_start_queue(ctlr);
if (ret)
- dev_err(&master->dev, "queue restart failed\n");
+ dev_err(&ctlr->dev, "queue restart failed\n");
return ret;
}
-EXPORT_SYMBOL_GPL(spi_master_resume);
+EXPORT_SYMBOL_GPL(spi_controller_resume);
-static int __spi_master_match(struct device *dev, const void *data)
+static int __spi_controller_match(struct device *dev, const void *data)
{
- struct spi_master *m;
+ struct spi_controller *ctlr;
const u16 *bus_num = data;
- m = container_of(dev, struct spi_master, dev);
- return m->bus_num == *bus_num;
+ ctlr = container_of(dev, struct spi_controller, dev);
+ return ctlr->bus_num == *bus_num;
}
/**
*
* This call may be used with devices that are registered after
* arch init time. It returns a refcounted pointer to the relevant
- * spi_master (which the caller must release), or NULL if there is
+ * spi_controller (which the caller must release), or NULL if there is
* no such master registered.
*
* Return: the SPI master structure on success, else NULL.
*/
-struct spi_master *spi_busnum_to_master(u16 bus_num)
+struct spi_controller *spi_busnum_to_master(u16 bus_num)
{
struct device *dev;
- struct spi_master *master = NULL;
+ struct spi_controller *ctlr = NULL;
dev = class_find_device(&spi_master_class, NULL, &bus_num,
- __spi_master_match);
+ __spi_controller_match);
if (dev)
- master = container_of(dev, struct spi_master, dev);
+ ctlr = container_of(dev, struct spi_controller, dev);
/* reference got in class_find_device */
- return master;
+ return ctlr;
}
EXPORT_SYMBOL_GPL(spi_busnum_to_master);
* Return: the pointer to the allocated data
*
* This may get enhanced in the future to allocate from a memory pool
- * of the @spi_device or @spi_master to avoid repeated allocations.
+ * of the @spi_device or @spi_controller to avoid repeated allocations.
*/
void *spi_res_alloc(struct spi_device *spi,
spi_res_release_t release,
/**
* spi_res_release - release all spi resources for this message
- * @master: the @spi_master
+ * @ctlr: the @spi_controller
* @message: the @spi_message
*/
-void spi_res_release(struct spi_master *master,
- struct spi_message *message)
+void spi_res_release(struct spi_controller *ctlr, struct spi_message *message)
{
struct spi_res *res;
struct spi_res, entry);
if (res->release)
- res->release(master, message, res->data);
+ res->release(ctlr, message, res->data);
list_del(&res->entry);
/* Core methods for spi_message alterations */
-static void __spi_replace_transfers_release(struct spi_master *master,
+static void __spi_replace_transfers_release(struct spi_controller *ctlr,
struct spi_message *msg,
void *res)
{
/* call extra callback if requested */
if (rxfer->release)
- rxfer->release(master, msg, res);
+ rxfer->release(ctlr, msg, res);
/* insert replaced transfers back into the message */
list_splice(&rxfer->replaced_transfers, rxfer->replaced_after);
}
EXPORT_SYMBOL_GPL(spi_replace_transfers);
-static int __spi_split_transfer_maxsize(struct spi_master *master,
+static int __spi_split_transfer_maxsize(struct spi_controller *ctlr,
struct spi_message *msg,
struct spi_transfer **xferp,
size_t maxsize,
*xferp = &xfers[count - 1];
/* increment statistics counters */
- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics,
+ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics,
transfers_split_maxsize);
SPI_STATISTICS_INCREMENT_FIELD(&msg->spi->statistics,
transfers_split_maxsize);
* spi_split_tranfers_maxsize - split spi transfers into multiple transfers
* when an individual transfer exceeds a
* certain size
- * @master: the @spi_master for this transfer
+ * @ctlr: the @spi_controller for this transfer
* @msg: the @spi_message to transform
* @maxsize: the maximum when to apply this
* @gfp: GFP allocation flags
*
* Return: status of transformation
*/
-int spi_split_transfers_maxsize(struct spi_master *master,
+int spi_split_transfers_maxsize(struct spi_controller *ctlr,
struct spi_message *msg,
size_t maxsize,
gfp_t gfp)
*/
list_for_each_entry(xfer, &msg->transfers, transfer_list) {
if (xfer->len > maxsize) {
- ret = __spi_split_transfer_maxsize(
- master, msg, &xfer, maxsize, gfp);
+ ret = __spi_split_transfer_maxsize(ctlr, msg, &xfer,
+ maxsize, gfp);
if (ret)
return ret;
}
/*-------------------------------------------------------------------------*/
-/* Core methods for SPI master protocol drivers. Some of the
+/* Core methods for SPI controller protocol drivers. Some of the
* other core methods are currently defined as inline functions.
*/
-static int __spi_validate_bits_per_word(struct spi_master *master, u8 bits_per_word)
+static int __spi_validate_bits_per_word(struct spi_controller *ctlr,
+ u8 bits_per_word)
{
- if (master->bits_per_word_mask) {
+ if (ctlr->bits_per_word_mask) {
/* Only 32 bits fit in the mask */
if (bits_per_word > 32)
return -EINVAL;
- if (!(master->bits_per_word_mask &
- SPI_BPW_MASK(bits_per_word)))
+ if (!(ctlr->bits_per_word_mask & SPI_BPW_MASK(bits_per_word)))
return -EINVAL;
}
(SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD)))
return -EINVAL;
/* help drivers fail *cleanly* when they need options
- * that aren't supported with their current master
+ * that aren't supported with their current controller
*/
- bad_bits = spi->mode & ~spi->master->mode_bits;
+ bad_bits = spi->mode & ~spi->controller->mode_bits;
ugly_bits = bad_bits &
(SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD);
if (ugly_bits) {
if (!spi->bits_per_word)
spi->bits_per_word = 8;
- status = __spi_validate_bits_per_word(spi->master, spi->bits_per_word);
+ status = __spi_validate_bits_per_word(spi->controller,
+ spi->bits_per_word);
if (status)
return status;
if (!spi->max_speed_hz)
- spi->max_speed_hz = spi->master->max_speed_hz;
+ spi->max_speed_hz = spi->controller->max_speed_hz;
- if (spi->master->setup)
- status = spi->master->setup(spi);
+ if (spi->controller->setup)
+ status = spi->controller->setup(spi);
spi_set_cs(spi, false);
static int __spi_validate(struct spi_device *spi, struct spi_message *message)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
struct spi_transfer *xfer;
int w_size;
* either MOSI or MISO is missing. They can also be caused by
* software limitations.
*/
- if ((master->flags & SPI_MASTER_HALF_DUPLEX)
- || (spi->mode & SPI_3WIRE)) {
- unsigned flags = master->flags;
+ if ((ctlr->flags & SPI_CONTROLLER_HALF_DUPLEX) ||
+ (spi->mode & SPI_3WIRE)) {
+ unsigned flags = ctlr->flags;
list_for_each_entry(xfer, &message->transfers, transfer_list) {
if (xfer->rx_buf && xfer->tx_buf)
return -EINVAL;
- if ((flags & SPI_MASTER_NO_TX) && xfer->tx_buf)
+ if ((flags & SPI_CONTROLLER_NO_TX) && xfer->tx_buf)
return -EINVAL;
- if ((flags & SPI_MASTER_NO_RX) && xfer->rx_buf)
+ if ((flags & SPI_CONTROLLER_NO_RX) && xfer->rx_buf)
return -EINVAL;
}
}
if (!xfer->speed_hz)
xfer->speed_hz = spi->max_speed_hz;
if (!xfer->speed_hz)
- xfer->speed_hz = master->max_speed_hz;
+ xfer->speed_hz = ctlr->max_speed_hz;
- if (master->max_speed_hz &&
- xfer->speed_hz > master->max_speed_hz)
- xfer->speed_hz = master->max_speed_hz;
+ if (ctlr->max_speed_hz && xfer->speed_hz > ctlr->max_speed_hz)
+ xfer->speed_hz = ctlr->max_speed_hz;
- if (__spi_validate_bits_per_word(master, xfer->bits_per_word))
+ if (__spi_validate_bits_per_word(ctlr, xfer->bits_per_word))
return -EINVAL;
/*
if (xfer->len % w_size)
return -EINVAL;
- if (xfer->speed_hz && master->min_speed_hz &&
- xfer->speed_hz < master->min_speed_hz)
+ if (xfer->speed_hz && ctlr->min_speed_hz &&
+ xfer->speed_hz < ctlr->min_speed_hz)
return -EINVAL;
if (xfer->tx_buf && !xfer->tx_nbits)
static int __spi_async(struct spi_device *spi, struct spi_message *message)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
message->spi = spi;
- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics, spi_async);
+ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics, spi_async);
SPI_STATISTICS_INCREMENT_FIELD(&spi->statistics, spi_async);
trace_spi_message_submit(message);
- return master->transfer(spi, message);
+ return ctlr->transfer(spi, message);
}
/**
*/
int spi_async(struct spi_device *spi, struct spi_message *message)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
int ret;
unsigned long flags;
if (ret != 0)
return ret;
- spin_lock_irqsave(&master->bus_lock_spinlock, flags);
+ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags);
- if (master->bus_lock_flag)
+ if (ctlr->bus_lock_flag)
ret = -EBUSY;
else
ret = __spi_async(spi, message);
- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags);
+ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags);
return ret;
}
*/
int spi_async_locked(struct spi_device *spi, struct spi_message *message)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
int ret;
unsigned long flags;
if (ret != 0)
return ret;
- spin_lock_irqsave(&master->bus_lock_spinlock, flags);
+ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags);
ret = __spi_async(spi, message);
- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags);
+ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags);
return ret;
struct spi_flash_read_message *msg)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *master = spi->controller;
struct device *rx_dev = NULL;
int ret;
/*-------------------------------------------------------------------------*/
-/* Utility methods for SPI master protocol drivers, layered on
+/* Utility methods for SPI protocol drivers, layered on
* top of the core. Some other utility methods are defined as
* inline functions.
*/
{
DECLARE_COMPLETION_ONSTACK(done);
int status;
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
unsigned long flags;
status = __spi_validate(spi, message);
message->context = &done;
message->spi = spi;
- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics, spi_sync);
+ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics, spi_sync);
SPI_STATISTICS_INCREMENT_FIELD(&spi->statistics, spi_sync);
/* If we're not using the legacy transfer method then we will
* This code would be less tricky if we could remove the
* support for driver implemented message queues.
*/
- if (master->transfer == spi_queued_transfer) {
- spin_lock_irqsave(&master->bus_lock_spinlock, flags);
+ if (ctlr->transfer == spi_queued_transfer) {
+ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags);
trace_spi_message_submit(message);
status = __spi_queued_transfer(spi, message, false);
- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags);
+ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags);
} else {
status = spi_async_locked(spi, message);
}
/* Push out the messages in the calling context if we
* can.
*/
- if (master->transfer == spi_queued_transfer) {
- SPI_STATISTICS_INCREMENT_FIELD(&master->statistics,
+ if (ctlr->transfer == spi_queued_transfer) {
+ SPI_STATISTICS_INCREMENT_FIELD(&ctlr->statistics,
spi_sync_immediate);
SPI_STATISTICS_INCREMENT_FIELD(&spi->statistics,
spi_sync_immediate);
- __spi_pump_messages(master, false);
+ __spi_pump_messages(ctlr, false);
}
wait_for_completion(&done);
{
int ret;
- mutex_lock(&spi->master->bus_lock_mutex);
+ mutex_lock(&spi->controller->bus_lock_mutex);
ret = __spi_sync(spi, message);
- mutex_unlock(&spi->master->bus_lock_mutex);
+ mutex_unlock(&spi->controller->bus_lock_mutex);
return ret;
}
/**
* spi_bus_lock - obtain a lock for exclusive SPI bus usage
- * @master: SPI bus master that should be locked for exclusive bus access
+ * @ctlr: SPI bus master that should be locked for exclusive bus access
* Context: can sleep
*
* This call may only be used from a context that may sleep. The sleep
*
* Return: always zero.
*/
-int spi_bus_lock(struct spi_master *master)
+int spi_bus_lock(struct spi_controller *ctlr)
{
unsigned long flags;
- mutex_lock(&master->bus_lock_mutex);
+ mutex_lock(&ctlr->bus_lock_mutex);
- spin_lock_irqsave(&master->bus_lock_spinlock, flags);
- master->bus_lock_flag = 1;
- spin_unlock_irqrestore(&master->bus_lock_spinlock, flags);
+ spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags);
+ ctlr->bus_lock_flag = 1;
+ spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags);
/* mutex remains locked until spi_bus_unlock is called */
/**
* spi_bus_unlock - release the lock for exclusive SPI bus usage
- * @master: SPI bus master that was locked for exclusive bus access
+ * @ctlr: SPI bus master that was locked for exclusive bus access
* Context: can sleep
*
* This call may only be used from a context that may sleep. The sleep
*
* Return: always zero.
*/
-int spi_bus_unlock(struct spi_master *master)
+int spi_bus_unlock(struct spi_controller *ctlr)
{
- master->bus_lock_flag = 0;
+ ctlr->bus_lock_flag = 0;
- mutex_unlock(&master->bus_lock_mutex);
+ mutex_unlock(&ctlr->bus_lock_mutex);
return 0;
}
return dev ? to_spi_device(dev) : NULL;
}
-static int __spi_of_master_match(struct device *dev, const void *data)
+static int __spi_of_controller_match(struct device *dev, const void *data)
{
return dev->of_node == data;
}
-/* the spi masters are not using spi_bus, so we find it with another way */
-static struct spi_master *of_find_spi_master_by_node(struct device_node *node)
+/* the spi controllers are not using spi_bus, so we find it with another way */
+static struct spi_controller *of_find_spi_controller_by_node(struct device_node *node)
{
struct device *dev;
dev = class_find_device(&spi_master_class, NULL, node,
- __spi_of_master_match);
+ __spi_of_controller_match);
+ if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE))
+ dev = class_find_device(&spi_slave_class, NULL, node,
+ __spi_of_controller_match);
if (!dev)
return NULL;
/* reference got in class_find_device */
- return container_of(dev, struct spi_master, dev);
+ return container_of(dev, struct spi_controller, dev);
}
static int of_spi_notify(struct notifier_block *nb, unsigned long action,
void *arg)
{
struct of_reconfig_data *rd = arg;
- struct spi_master *master;
+ struct spi_controller *ctlr;
struct spi_device *spi;
switch (of_reconfig_get_state_change(action, arg)) {
case OF_RECONFIG_CHANGE_ADD:
- master = of_find_spi_master_by_node(rd->dn->parent);
- if (master == NULL)
+ ctlr = of_find_spi_controller_by_node(rd->dn->parent);
+ if (ctlr == NULL)
return NOTIFY_OK; /* not for us */
if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) {
- put_device(&master->dev);
+ put_device(&ctlr->dev);
return NOTIFY_OK;
}
- spi = of_register_spi_device(master, rd->dn);
- put_device(&master->dev);
+ spi = of_register_spi_device(ctlr, rd->dn);
+ put_device(&ctlr->dev);
if (IS_ERR(spi)) {
pr_err("%s: failed to create for '%s'\n",
#endif /* IS_ENABLED(CONFIG_OF_DYNAMIC) */
#if IS_ENABLED(CONFIG_ACPI)
-static int spi_acpi_master_match(struct device *dev, const void *data)
+static int spi_acpi_controller_match(struct device *dev, const void *data)
{
return ACPI_COMPANION(dev->parent) == data;
}
return ACPI_COMPANION(dev) == data;
}
-static struct spi_master *acpi_spi_find_master_by_adev(struct acpi_device *adev)
+static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev)
{
struct device *dev;
dev = class_find_device(&spi_master_class, NULL, adev,
- spi_acpi_master_match);
+ spi_acpi_controller_match);
+ if (!dev && IS_ENABLED(CONFIG_SPI_SLAVE))
+ dev = class_find_device(&spi_slave_class, NULL, adev,
+ spi_acpi_controller_match);
if (!dev)
return NULL;
- return container_of(dev, struct spi_master, dev);
+ return container_of(dev, struct spi_controller, dev);
}
static struct spi_device *acpi_spi_find_device_by_adev(struct acpi_device *adev)
void *arg)
{
struct acpi_device *adev = arg;
- struct spi_master *master;
+ struct spi_controller *ctlr;
struct spi_device *spi;
switch (value) {
case ACPI_RECONFIG_DEVICE_ADD:
- master = acpi_spi_find_master_by_adev(adev->parent);
- if (!master)
+ ctlr = acpi_spi_find_controller_by_adev(adev->parent);
+ if (!ctlr)
break;
- acpi_register_spi_device(master, adev);
- put_device(&master->dev);
+ acpi_register_spi_device(ctlr, adev);
+ put_device(&ctlr->dev);
break;
case ACPI_RECONFIG_DEVICE_REMOVE:
if (!acpi_device_enumerated(adev))
if (status < 0)
goto err2;
+ if (IS_ENABLED(CONFIG_SPI_SLAVE)) {
+ status = class_register(&spi_slave_class);
+ if (status < 0)
+ goto err3;
+ }
+
if (IS_ENABLED(CONFIG_OF_DYNAMIC))
WARN_ON(of_reconfig_notifier_register(&spi_of_notifier));
if (IS_ENABLED(CONFIG_ACPI))
return 0;
+err3:
+ class_unregister(&spi_master_class);
err2:
bus_unregister(&spi_bus_type);
err1:
struct dma_chan;
struct property_entry;
-struct spi_master;
+struct spi_controller;
struct spi_transfer;
struct spi_flash_read_message;
/*
- * INTERFACES between SPI master-side drivers and SPI infrastructure.
- * (There's no SPI slave support for Linux yet...)
+ * INTERFACES between SPI master-side drivers and SPI slave protocol handlers,
+ * and SPI infrastructure.
*/
extern struct bus_type spi_bus_type;
void spi_statistics_add_transfer_stats(struct spi_statistics *stats,
struct spi_transfer *xfer,
- struct spi_master *master);
+ struct spi_controller *ctlr);
#define SPI_STATISTICS_ADD_TO_FIELD(stats, field, count) \
do { \
SPI_STATISTICS_ADD_TO_FIELD(stats, field, 1)
/**
- * struct spi_device - Master side proxy for an SPI slave device
+ * struct spi_device - Controller side proxy for an SPI slave device
* @dev: Driver model representation of the device.
- * @master: SPI controller used with the device.
+ * @controller: SPI controller used with the device.
+ * @master: Copy of controller, for backwards compatibility.
* @max_speed_hz: Maximum clock rate to be used with this chip
* (on this board); may be changed by the device's driver.
* The spi_transfer.speed_hz can override this for each transfer.
- * @chip_select: Chipselect, distinguishing chips handled by @master.
+ * @chip_select: Chipselect, distinguishing chips handled by @controller.
* @mode: The spi mode defines how data is clocked out and in.
* This may be changed by the device's driver.
* The "active low" default for chipselect mode can be overridden
*/
struct spi_device {
struct device dev;
- struct spi_master *master;
+ struct spi_controller *controller;
+ struct spi_controller *master; /* compatibility layer */
u32 max_speed_hz;
u8 chip_select;
u8 bits_per_word;
put_device(&spi->dev);
}
-/* ctldata is for the bus_master driver's runtime state */
+/* ctldata is for the bus_controller driver's runtime state */
static inline void *spi_get_ctldata(struct spi_device *spi)
{
return spi->controller_state;
spi_unregister_driver)
/**
- * struct spi_master - interface to SPI master controller
+ * struct spi_controller - interface to SPI master or slave controller
* @dev: device interface to this driver
- * @list: link with the global spi_master list
+ * @list: link with the global spi_controller list
* @bus_num: board-specific (and often SOC-specific) identifier for a
* given SPI controller.
* @num_chipselect: chipselects are used to distinguish individual
* @min_speed_hz: Lowest supported transfer speed
* @max_speed_hz: Highest supported transfer speed
* @flags: other constraints relevant to this driver
+ * @slave: indicates that this is an SPI slave controller
* @max_transfer_size: function that returns the max transfer size for
* a &spi_device; may be %NULL, so the default %SIZE_MAX will be used.
* @max_message_size: function that returns the max message size for
* the device whose settings are being modified.
* @transfer: adds a message to the controller's transfer queue.
* @cleanup: frees controller-specific state
- * @can_dma: determine whether this master supports DMA
- * @queued: whether this master is providing an internal message queue
+ * @can_dma: determine whether this controller supports DMA
+ * @queued: whether this controller is providing an internal message queue
* @kworker: thread struct for message pump
* @kworker_task: pointer to task for message pump kworker thread
* @pump_messages: work struct for scheduling work to the message pump
* @handle_err: the subsystem calls the driver to handle an error that occurs
* in the generic implementation of transfer_one_message().
* @unprepare_message: undo any work done by prepare_message().
+ * @slave_abort: abort the ongoing transfer request on an SPI slave controller
* @spi_flash_read: to support spi-controller hardwares that provide
* accelerated interface to read from flash devices.
* @spi_flash_can_dma: analogous to can_dma() interface, but for
* @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
* number. Any individual value may be -ENOENT for CS lines that
* are not GPIOs (driven by the SPI controller itself).
- * @statistics: statistics for the spi_master
+ * @statistics: statistics for the spi_controller
* @dma_tx: DMA transmit channel
* @dma_rx: DMA receive channel
* @dummy_rx: dummy receive buffer for full-duplex devices
* what Linux expects, this optional hook can be used to translate
* between the two.
*
- * Each SPI master controller can communicate with one or more @spi_device
+ * Each SPI controller can communicate with one or more @spi_device
* children. These make a small bus, sharing MOSI, MISO and SCK signals
* but not chip select signals. Each device may be configured to use a
* different clock rate, since those shared signals are ignored unless
* an SPI slave device. For each such message it queues, it calls the
* message's completion function when the transaction completes.
*/
-struct spi_master {
+struct spi_controller {
struct device dev;
struct list_head list;
/* other constraints relevant to this driver */
u16 flags;
-#define SPI_MASTER_HALF_DUPLEX BIT(0) /* can't do full duplex */
-#define SPI_MASTER_NO_RX BIT(1) /* can't do buffer read */
-#define SPI_MASTER_NO_TX BIT(2) /* can't do buffer write */
-#define SPI_MASTER_MUST_RX BIT(3) /* requires rx */
-#define SPI_MASTER_MUST_TX BIT(4) /* requires tx */
-#define SPI_MASTER_GPIO_SS BIT(5) /* GPIO CS must select slave */
+#define SPI_CONTROLLER_HALF_DUPLEX BIT(0) /* can't do full duplex */
+#define SPI_CONTROLLER_NO_RX BIT(1) /* can't do buffer read */
+#define SPI_CONTROLLER_NO_TX BIT(2) /* can't do buffer write */
+#define SPI_CONTROLLER_MUST_RX BIT(3) /* requires rx */
+#define SPI_CONTROLLER_MUST_TX BIT(4) /* requires tx */
+
+#define SPI_MASTER_GPIO_SS BIT(5) /* GPIO CS must select slave */
+
+ /* flag indicating this is an SPI slave controller */
+ bool slave;
/*
* on some hardware transfer / message size may be constrained
* any other request management
* + To a given spi_device, message queueing is pure fifo
*
- * + The master's main job is to process its message queue,
- * selecting a chip then transferring data
+ * + The controller's main job is to process its message queue,
+ * selecting a chip (for masters), then transferring data
* + If there are multiple spi_device children, the i/o queue
* arbitration algorithm is unspecified (round robin, fifo,
* priority, reservations, preemption, etc)
int (*transfer)(struct spi_device *spi,
struct spi_message *mesg);
- /* called on release() to free memory provided by spi_master */
+ /* called on release() to free memory provided by spi_controller */
void (*cleanup)(struct spi_device *spi);
/*
* not modify or store xfer and dma_tx and dma_rx must be set
* while the device is prepared.
*/
- bool (*can_dma)(struct spi_master *master,
+ bool (*can_dma)(struct spi_controller *ctlr,
struct spi_device *spi,
struct spi_transfer *xfer);
/*
* These hooks are for drivers that want to use the generic
- * master transfer queueing mechanism. If these are used, the
+ * controller transfer queueing mechanism. If these are used, the
* transfer() function above must NOT be specified by the driver.
* Over time we expect SPI drivers to be phased over to this API.
*/
struct completion xfer_completion;
size_t max_dma_len;
- int (*prepare_transfer_hardware)(struct spi_master *master);
- int (*transfer_one_message)(struct spi_master *master,
+ int (*prepare_transfer_hardware)(struct spi_controller *ctlr);
+ int (*transfer_one_message)(struct spi_controller *ctlr,
struct spi_message *mesg);
- int (*unprepare_transfer_hardware)(struct spi_master *master);
- int (*prepare_message)(struct spi_master *master,
+ int (*unprepare_transfer_hardware)(struct spi_controller *ctlr);
+ int (*prepare_message)(struct spi_controller *ctlr,
struct spi_message *message);
- int (*unprepare_message)(struct spi_master *master,
+ int (*unprepare_message)(struct spi_controller *ctlr,
struct spi_message *message);
+ int (*slave_abort)(struct spi_controller *ctlr);
int (*spi_flash_read)(struct spi_device *spi,
struct spi_flash_read_message *msg);
bool (*spi_flash_can_dma)(struct spi_device *spi,
* of transfer_one_message() provied by the core.
*/
void (*set_cs)(struct spi_device *spi, bool enable);
- int (*transfer_one)(struct spi_master *master, struct spi_device *spi,
+ int (*transfer_one)(struct spi_controller *ctlr, struct spi_device *spi,
struct spi_transfer *transfer);
- void (*handle_err)(struct spi_master *master,
+ void (*handle_err)(struct spi_controller *ctlr,
struct spi_message *message);
/* gpio chip select */
void *dummy_rx;
void *dummy_tx;
- int (*fw_translate_cs)(struct spi_master *master, unsigned cs);
+ int (*fw_translate_cs)(struct spi_controller *ctlr, unsigned cs);
};
-static inline void *spi_master_get_devdata(struct spi_master *master)
+static inline void *spi_controller_get_devdata(struct spi_controller *ctlr)
{
- return dev_get_drvdata(&master->dev);
+ return dev_get_drvdata(&ctlr->dev);
}
-static inline void spi_master_set_devdata(struct spi_master *master, void *data)
+static inline void spi_controller_set_devdata(struct spi_controller *ctlr,
+ void *data)
{
- dev_set_drvdata(&master->dev, data);
+ dev_set_drvdata(&ctlr->dev, data);
}
-static inline struct spi_master *spi_master_get(struct spi_master *master)
+static inline struct spi_controller *spi_controller_get(struct spi_controller *ctlr)
{
- if (!master || !get_device(&master->dev))
+ if (!ctlr || !get_device(&ctlr->dev))
return NULL;
- return master;
+ return ctlr;
+}
+
+static inline void spi_controller_put(struct spi_controller *ctlr)
+{
+ if (ctlr)
+ put_device(&ctlr->dev);
}
-static inline void spi_master_put(struct spi_master *master)
+static inline bool spi_controller_is_slave(struct spi_controller *ctlr)
{
- if (master)
- put_device(&master->dev);
+ return IS_ENABLED(CONFIG_SPI_SLAVE) && ctlr->slave;
}
/* PM calls that need to be issued by the driver */
-extern int spi_master_suspend(struct spi_master *master);
-extern int spi_master_resume(struct spi_master *master);
+extern int spi_controller_suspend(struct spi_controller *ctlr);
+extern int spi_controller_resume(struct spi_controller *ctlr);
/* Calls the driver make to interact with the message queue */
-extern struct spi_message *spi_get_next_queued_message(struct spi_master *master);
-extern void spi_finalize_current_message(struct spi_master *master);
-extern void spi_finalize_current_transfer(struct spi_master *master);
+extern struct spi_message *spi_get_next_queued_message(struct spi_controller *ctlr);
+extern void spi_finalize_current_message(struct spi_controller *ctlr);
+extern void spi_finalize_current_transfer(struct spi_controller *ctlr);
-/* the spi driver core manages memory for the spi_master classdev */
-extern struct spi_master *
-spi_alloc_master(struct device *host, unsigned size);
+/* the spi driver core manages memory for the spi_controller classdev */
+extern struct spi_controller *__spi_alloc_controller(struct device *host,
+ unsigned int size, bool slave);
-extern int spi_register_master(struct spi_master *master);
-extern int devm_spi_register_master(struct device *dev,
- struct spi_master *master);
-extern void spi_unregister_master(struct spi_master *master);
+static inline struct spi_controller *spi_alloc_master(struct device *host,
+ unsigned int size)
+{
+ return __spi_alloc_controller(host, size, false);
+}
-extern struct spi_master *spi_busnum_to_master(u16 busnum);
+static inline struct spi_controller *spi_alloc_slave(struct device *host,
+ unsigned int size)
+{
+ if (!IS_ENABLED(CONFIG_SPI_SLAVE))
+ return NULL;
+
+ return __spi_alloc_controller(host, size, true);
+}
+
+extern int spi_register_controller(struct spi_controller *ctlr);
+extern int devm_spi_register_controller(struct device *dev,
+ struct spi_controller *ctlr);
+extern void spi_unregister_controller(struct spi_controller *ctlr);
+
+extern struct spi_controller *spi_busnum_to_master(u16 busnum);
/*
* SPI resource management while processing a SPI message
*/
-typedef void (*spi_res_release_t)(struct spi_master *master,
+typedef void (*spi_res_release_t)(struct spi_controller *ctlr,
struct spi_message *msg,
void *res);
extern void spi_res_add(struct spi_message *message, void *res);
extern void spi_res_free(void *res);
-extern void spi_res_release(struct spi_master *master,
+extern void spi_res_release(struct spi_controller *ctlr,
struct spi_message *message);
/*---------------------------------------------------------------------------*/
/* for optional use by whatever driver currently owns the
* spi_message ... between calls to spi_async and then later
- * complete(), that's the spi_master controller driver.
+ * complete(), that's the spi_controller controller driver.
*/
struct list_head queue;
void *state;
extern int spi_async(struct spi_device *spi, struct spi_message *message);
extern int spi_async_locked(struct spi_device *spi,
struct spi_message *message);
+extern int spi_slave_abort(struct spi_device *spi);
static inline size_t
spi_max_message_size(struct spi_device *spi)
{
- struct spi_master *master = spi->master;
- if (!master->max_message_size)
+ struct spi_controller *ctlr = spi->controller;
+
+ if (!ctlr->max_message_size)
return SIZE_MAX;
- return master->max_message_size(spi);
+ return ctlr->max_message_size(spi);
}
static inline size_t
spi_max_transfer_size(struct spi_device *spi)
{
- struct spi_master *master = spi->master;
+ struct spi_controller *ctlr = spi->controller;
size_t tr_max = SIZE_MAX;
size_t msg_max = spi_max_message_size(spi);
- if (master->max_transfer_size)
- tr_max = master->max_transfer_size(spi);
+ if (ctlr->max_transfer_size)
+ tr_max = ctlr->max_transfer_size(spi);
/* transfer size limit must not be greater than messsage size limit */
return min(tr_max, msg_max);
/* SPI transfer replacement methods which make use of spi_res */
struct spi_replaced_transfers;
-typedef void (*spi_replaced_release_t)(struct spi_master *master,
+typedef void (*spi_replaced_release_t)(struct spi_controller *ctlr,
struct spi_message *msg,
struct spi_replaced_transfers *res);
/**
/* SPI transfer transformation methods */
-extern int spi_split_transfers_maxsize(struct spi_master *master,
+extern int spi_split_transfers_maxsize(struct spi_controller *ctlr,
struct spi_message *msg,
size_t maxsize,
gfp_t gfp);
extern int spi_sync(struct spi_device *spi, struct spi_message *message);
extern int spi_sync_locked(struct spi_device *spi, struct spi_message *message);
-extern int spi_bus_lock(struct spi_master *master);
-extern int spi_bus_unlock(struct spi_master *master);
+extern int spi_bus_lock(struct spi_controller *ctlr);
+extern int spi_bus_unlock(struct spi_controller *ctlr);
/**
* spi_sync_transfer - synchronous SPI data transfer
/* SPI core interface for flash read support */
static inline bool spi_flash_read_supported(struct spi_device *spi)
{
- return spi->master->spi_flash_read &&
- (!spi->master->flash_read_supported ||
- spi->master->flash_read_supported(spi));
+ return spi->controller->spi_flash_read &&
+ (!spi->controller->flash_read_supported ||
+ spi->controller->flash_read_supported(spi));
}
int spi_flash_read(struct spi_device *spi,
* @irq: Initializes spi_device.irq; depends on how the board is wired.
* @max_speed_hz: Initializes spi_device.max_speed_hz; based on limits
* from the chip datasheet and board-specific signal quality issues.
- * @bus_num: Identifies which spi_master parents the spi_device; unused
+ * @bus_num: Identifies which spi_controller parents the spi_device; unused
* by spi_new_device(), and otherwise depends on board wiring.
* @chip_select: Initializes spi_device.chip_select; depends on how
* the board is wired.
/* bus_num is board specific and matches the bus_num of some
- * spi_master that will probably be registered later.
+ * spi_controller that will probably be registered later.
*
* chip_select reflects how this chip is wired to that master;
* it's less than num_chipselect.
/* If you're hotplugging an adapter with devices (parport, usb, etc)
* use spi_new_device() to describe each device. You can also call
* spi_unregister_device() to start making that device vanish, but
- * normally that would be handled by spi_unregister_master().
+ * normally that would be handled by spi_unregister_controller().
*
* You can also use spi_alloc_device() and spi_add_device() to use a two
* stage registration sequence for each spi_device. This gives the caller
* be defined using the board info.
*/
extern struct spi_device *
-spi_alloc_device(struct spi_master *master);
+spi_alloc_device(struct spi_controller *ctlr);
extern int
spi_add_device(struct spi_device *spi);
extern struct spi_device *
-spi_new_device(struct spi_master *, struct spi_board_info *);
+spi_new_device(struct spi_controller *, struct spi_board_info *);
extern void spi_unregister_device(struct spi_device *spi);
spi_get_device_id(const struct spi_device *sdev);
static inline bool
-spi_transfer_is_last(struct spi_master *master, struct spi_transfer *xfer)
+spi_transfer_is_last(struct spi_controller *ctlr, struct spi_transfer *xfer)
{
- return list_is_last(&xfer->transfer_list, &master->cur_msg->transfers);
+ return list_is_last(&xfer->transfer_list, &ctlr->cur_msg->transfers);
}
+
+/* Compatibility layer */
+#define spi_master spi_controller
+
+#define SPI_MASTER_HALF_DUPLEX SPI_CONTROLLER_HALF_DUPLEX
+#define SPI_MASTER_NO_RX SPI_CONTROLLER_NO_RX
+#define SPI_MASTER_NO_TX SPI_CONTROLLER_NO_TX
+#define SPI_MASTER_MUST_RX SPI_CONTROLLER_MUST_RX
+#define SPI_MASTER_MUST_TX SPI_CONTROLLER_MUST_TX
+
+#define spi_master_get_devdata(_ctlr) spi_controller_get_devdata(_ctlr)
+#define spi_master_set_devdata(_ctlr, _data) \
+ spi_controller_set_devdata(_ctlr, _data)
+#define spi_master_get(_ctlr) spi_controller_get(_ctlr)
+#define spi_master_put(_ctlr) spi_controller_put(_ctlr)
+#define spi_master_suspend(_ctlr) spi_controller_suspend(_ctlr)
+#define spi_master_resume(_ctlr) spi_controller_resume(_ctlr)
+
+#define spi_register_master(_ctlr) spi_register_controller(_ctlr)
+#define devm_spi_register_master(_dev, _ctlr) \
+ devm_spi_register_controller(_dev, _ctlr)
+#define spi_unregister_master(_ctlr) spi_unregister_controller(_ctlr)
+
#endif /* __LINUX_SPI_H */
projects / platform / kernel / linux-starfive.git / commitdiff