mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-28 16:29:43 +02:00
a210854b74
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16048 3c298f89-4303-0410-b956-a3cf2f4a3e73
419 lines
12 KiB
Diff
419 lines
12 KiB
Diff
--- a/arch/arm/mach-s3c2410/include/mach/spi-gpio.h
|
|
+++ b/arch/arm/mach-s3c2410/include/mach/spi-gpio.h
|
|
@@ -21,7 +21,8 @@ struct s3c2410_spigpio_info {
|
|
int num_chipselect;
|
|
int bus_num;
|
|
|
|
- void (*chip_select)(struct s3c2410_spigpio_info *spi, int cs);
|
|
+ int non_blocking_transfer;
|
|
+ void (*chip_select)(struct s3c2410_spigpio_info *spi, int csid, int cs);
|
|
};
|
|
|
|
|
|
--- a/drivers/spi/spi_bitbang.c
|
|
+++ b/drivers/spi/spi_bitbang.c
|
|
@@ -264,6 +264,123 @@ static int spi_bitbang_bufs(struct spi_d
|
|
* Drivers can provide word-at-a-time i/o primitives, or provide
|
|
* transfer-at-a-time ones to leverage dma or fifo hardware.
|
|
*/
|
|
+
|
|
+/* Synchronous non blocking transfer */
|
|
+int
|
|
+spi_bitbang_transfer_sync(struct spi_device *spi, struct spi_message *m)
|
|
+{
|
|
+ struct spi_bitbang *bitbang = spi_master_get_devdata(spi->master);
|
|
+ struct spi_transfer *t;
|
|
+ unsigned long flags;
|
|
+ int cs_change = 1;
|
|
+ int status;
|
|
+ int nsecs;
|
|
+ int (*setup_transfer)(struct spi_device *, struct spi_transfer *);
|
|
+
|
|
+ /* FIXME this is made-up ... the correct value is known to
|
|
+ * word-at-a-time bitbang code, and presumably chipselect()
|
|
+ * should enforce these requirements too?
|
|
+ */
|
|
+ nsecs = 100;
|
|
+ cs_change = 1;
|
|
+ status = 0;
|
|
+ setup_transfer = NULL;
|
|
+
|
|
+ local_irq_save(flags);
|
|
+ list_for_each_entry (t, &m->transfers, transfer_list) {
|
|
+ /* override or restore speed and wordsize */
|
|
+ if (t->speed_hz || t->bits_per_word) {
|
|
+ setup_transfer = bitbang->setup_transfer;
|
|
+ if (!setup_transfer) {
|
|
+ status = -ENOPROTOOPT;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ if (setup_transfer) {
|
|
+ status = setup_transfer(spi, t);
|
|
+ if (status < 0)
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ /* set up default clock polarity, and activate chip;
|
|
+ * this implicitly updates clock and spi modes as
|
|
+ * previously recorded for this device via setup().
|
|
+ * (and also deselects any other chip that might be
|
|
+ * selected ...)
|
|
+ */
|
|
+
|
|
+ if (cs_change) {
|
|
+ bitbang->chipselect(spi, BITBANG_CS_ACTIVE);
|
|
+ ndelay(nsecs);
|
|
+ }
|
|
+
|
|
+ cs_change = t->cs_change;
|
|
+ if (!t->tx_buf && !t->rx_buf && t->len) {
|
|
+ status = -EINVAL;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ /* transfer data. the lower level code handles any
|
|
+ * new dma mappings it needs. our caller always gave
|
|
+ * us dma-safe buffers.
|
|
+ */
|
|
+ if (t->len) {
|
|
+ /* REVISIT dma API still needs a designated
|
|
+ * DMA_ADDR_INVALID; ~0 might be better.
|
|
+ */
|
|
+ if (!m->is_dma_mapped)
|
|
+ t->rx_dma = t->tx_dma = 0;
|
|
+ status = bitbang->txrx_bufs(spi, t);
|
|
+ }
|
|
+
|
|
+ if (status > 0)
|
|
+ m->actual_length += status;
|
|
+ if (status != t->len) {
|
|
+ /* always report some kind of error */
|
|
+ if (status >= 0)
|
|
+ status = -EREMOTEIO;
|
|
+ break;
|
|
+ }
|
|
+ status = 0;
|
|
+ /* protocol tweaks before next transfer */
|
|
+ if (t->delay_usecs)
|
|
+ udelay(t->delay_usecs);
|
|
+ if (!cs_change)
|
|
+ continue;
|
|
+ if (t->transfer_list.next == &m->transfers)
|
|
+ break;
|
|
+ /* sometimes a short mid-message deselect of the chip
|
|
+ * may be needed to terminate a mode or command
|
|
+ */
|
|
+ ndelay(nsecs);
|
|
+ bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
|
|
+ ndelay(nsecs);
|
|
+ }
|
|
+
|
|
+ m->status = status;
|
|
+ if (m->complete)
|
|
+ m->complete(m->context);
|
|
+
|
|
+ /* restore speed and wordsize */
|
|
+ if (setup_transfer)
|
|
+ setup_transfer(spi, NULL);
|
|
+
|
|
+ /* normally deactivate chipselect ... unless no error and
|
|
+ * cs_change has hinted that the next message will probably
|
|
+ * be for this chip too.
|
|
+ */
|
|
+ if (!(status == 0 && cs_change)) {
|
|
+ ndelay(nsecs);
|
|
+ bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
|
|
+ ndelay(nsecs);
|
|
+ }
|
|
+
|
|
+ local_irq_restore(flags);
|
|
+
|
|
+ return status;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(spi_bitbang_transfer_sync);
|
|
+
|
|
static void bitbang_work(struct work_struct *work)
|
|
{
|
|
struct spi_bitbang *bitbang =
|
|
@@ -274,120 +391,13 @@ static void bitbang_work(struct work_str
|
|
bitbang->busy = 1;
|
|
while (!list_empty(&bitbang->queue)) {
|
|
struct spi_message *m;
|
|
- struct spi_device *spi;
|
|
- unsigned nsecs;
|
|
- struct spi_transfer *t = NULL;
|
|
- unsigned tmp;
|
|
- unsigned cs_change;
|
|
- int status;
|
|
- int (*setup_transfer)(struct spi_device *,
|
|
- struct spi_transfer *);
|
|
|
|
m = container_of(bitbang->queue.next, struct spi_message,
|
|
queue);
|
|
list_del_init(&m->queue);
|
|
- spin_unlock_irqrestore(&bitbang->lock, flags);
|
|
-
|
|
- /* FIXME this is made-up ... the correct value is known to
|
|
- * word-at-a-time bitbang code, and presumably chipselect()
|
|
- * should enforce these requirements too?
|
|
- */
|
|
- nsecs = 100;
|
|
-
|
|
- spi = m->spi;
|
|
- tmp = 0;
|
|
- cs_change = 1;
|
|
- status = 0;
|
|
- setup_transfer = NULL;
|
|
-
|
|
- list_for_each_entry (t, &m->transfers, transfer_list) {
|
|
-
|
|
- /* override or restore speed and wordsize */
|
|
- if (t->speed_hz || t->bits_per_word) {
|
|
- setup_transfer = bitbang->setup_transfer;
|
|
- if (!setup_transfer) {
|
|
- status = -ENOPROTOOPT;
|
|
- break;
|
|
- }
|
|
- }
|
|
- if (setup_transfer) {
|
|
- status = setup_transfer(spi, t);
|
|
- if (status < 0)
|
|
- break;
|
|
- }
|
|
-
|
|
- /* set up default clock polarity, and activate chip;
|
|
- * this implicitly updates clock and spi modes as
|
|
- * previously recorded for this device via setup().
|
|
- * (and also deselects any other chip that might be
|
|
- * selected ...)
|
|
- */
|
|
- if (cs_change) {
|
|
- bitbang->chipselect(spi, BITBANG_CS_ACTIVE);
|
|
- ndelay(nsecs);
|
|
- }
|
|
- cs_change = t->cs_change;
|
|
- if (!t->tx_buf && !t->rx_buf && t->len) {
|
|
- status = -EINVAL;
|
|
- break;
|
|
- }
|
|
-
|
|
- /* transfer data. the lower level code handles any
|
|
- * new dma mappings it needs. our caller always gave
|
|
- * us dma-safe buffers.
|
|
- */
|
|
- if (t->len) {
|
|
- /* REVISIT dma API still needs a designated
|
|
- * DMA_ADDR_INVALID; ~0 might be better.
|
|
- */
|
|
- if (!m->is_dma_mapped)
|
|
- t->rx_dma = t->tx_dma = 0;
|
|
- status = bitbang->txrx_bufs(spi, t);
|
|
- }
|
|
- if (status > 0)
|
|
- m->actual_length += status;
|
|
- if (status != t->len) {
|
|
- /* always report some kind of error */
|
|
- if (status >= 0)
|
|
- status = -EREMOTEIO;
|
|
- break;
|
|
- }
|
|
- status = 0;
|
|
-
|
|
- /* protocol tweaks before next transfer */
|
|
- if (t->delay_usecs)
|
|
- udelay(t->delay_usecs);
|
|
-
|
|
- if (!cs_change)
|
|
- continue;
|
|
- if (t->transfer_list.next == &m->transfers)
|
|
- break;
|
|
-
|
|
- /* sometimes a short mid-message deselect of the chip
|
|
- * may be needed to terminate a mode or command
|
|
- */
|
|
- ndelay(nsecs);
|
|
- bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
|
|
- ndelay(nsecs);
|
|
- }
|
|
-
|
|
- m->status = status;
|
|
- m->complete(m->context);
|
|
-
|
|
- /* restore speed and wordsize */
|
|
- if (setup_transfer)
|
|
- setup_transfer(spi, NULL);
|
|
-
|
|
- /* normally deactivate chipselect ... unless no error and
|
|
- * cs_change has hinted that the next message will probably
|
|
- * be for this chip too.
|
|
- */
|
|
- if (!(status == 0 && cs_change)) {
|
|
- ndelay(nsecs);
|
|
- bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
|
|
- ndelay(nsecs);
|
|
- }
|
|
|
|
+ spin_unlock_irqrestore(&bitbang->lock, flags);
|
|
+ spi_bitbang_transfer_sync(m->spi, m);
|
|
spin_lock_irqsave(&bitbang->lock, flags);
|
|
}
|
|
bitbang->busy = 0;
|
|
@@ -459,6 +469,9 @@ int spi_bitbang_start(struct spi_bitbang
|
|
|
|
if (!bitbang->master->transfer)
|
|
bitbang->master->transfer = spi_bitbang_transfer;
|
|
+ if (!bitbang->master->transfer_sync && bitbang->non_blocking_transfer)
|
|
+ bitbang->master->transfer_sync = spi_bitbang_transfer_sync;
|
|
+
|
|
if (!bitbang->txrx_bufs) {
|
|
bitbang->use_dma = 0;
|
|
bitbang->txrx_bufs = spi_bitbang_bufs;
|
|
--- a/drivers/spi/spi_s3c24xx_gpio.c
|
|
+++ b/drivers/spi/spi_s3c24xx_gpio.c
|
|
@@ -91,7 +91,7 @@ static void s3c2410_spigpio_chipselect(s
|
|
struct s3c2410_spigpio *sg = spidev_to_sg(dev);
|
|
|
|
if (sg->info && sg->info->chip_select)
|
|
- (sg->info->chip_select)(sg->info, value);
|
|
+ (sg->info->chip_select)(sg->info, dev->chip_select, value);
|
|
}
|
|
|
|
static int s3c2410_spigpio_probe(struct platform_device *dev)
|
|
@@ -112,14 +112,17 @@ static int s3c2410_spigpio_probe(struct
|
|
|
|
platform_set_drvdata(dev, sp);
|
|
|
|
- /* copy in the plkatform data */
|
|
+ /* copy in the platform data */
|
|
info = sp->info = dev->dev.platform_data;
|
|
|
|
+ master->num_chipselect = info->num_chipselect;
|
|
+
|
|
/* setup spi bitbang adaptor */
|
|
sp->bitbang.master = spi_master_get(master);
|
|
sp->bitbang.master->bus_num = info->bus_num;
|
|
sp->bitbang.master->num_chipselect = info->num_chipselect;
|
|
sp->bitbang.chipselect = s3c2410_spigpio_chipselect;
|
|
+ sp->bitbang.non_blocking_transfer = info->non_blocking_transfer;
|
|
|
|
sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0;
|
|
sp->bitbang.txrx_word[SPI_MODE_1] = s3c2410_spigpio_txrx_mode1;
|
|
--- a/include/linux/mmc/core.h
|
|
+++ b/include/linux/mmc/core.h
|
|
@@ -129,6 +129,8 @@ struct mmc_request {
|
|
struct mmc_host;
|
|
struct mmc_card;
|
|
|
|
+extern void mmc_flush_scheduled_work(void);
|
|
+
|
|
extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
|
|
extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
|
|
extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
|
|
--- a/include/linux/mmc/sdio_ids.h
|
|
+++ b/include/linux/mmc/sdio_ids.h
|
|
@@ -25,5 +25,9 @@
|
|
|
|
#define SDIO_VENDOR_ID_MARVELL 0x02df
|
|
#define SDIO_DEVICE_ID_MARVELL_LIBERTAS 0x9103
|
|
+#define SDIO_DEVICE_ID_MARVELL_88W8688 0x9104
|
|
+#define SDIO_VENDOR_ID_ATHEROS 0x0271
|
|
+#define SDIO_DEVICE_ID_ATHEROS_AR6001 0x0100
|
|
+#define SDIO_DEVICE_ID_ATHEROS_AR6002 0x0200
|
|
|
|
#endif
|
|
--- a/include/linux/spi/spi_bitbang.h
|
|
+++ b/include/linux/spi/spi_bitbang.h
|
|
@@ -31,6 +31,9 @@ struct spi_bitbang {
|
|
u8 use_dma;
|
|
u8 flags; /* extra spi->mode support */
|
|
|
|
+ /* Support for synchronous non blocking transfers */
|
|
+ int non_blocking_transfer;
|
|
+
|
|
struct spi_master *master;
|
|
|
|
/* setup_transfer() changes clock and/or wordsize to match settings
|
|
@@ -62,6 +65,8 @@ extern void spi_bitbang_cleanup(struct s
|
|
extern int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m);
|
|
extern int spi_bitbang_setup_transfer(struct spi_device *spi,
|
|
struct spi_transfer *t);
|
|
+extern int spi_bitbang_transfer_sync(struct spi_device *spi,
|
|
+ struct spi_message *m);
|
|
|
|
/* start or stop queue processing */
|
|
extern int spi_bitbang_start(struct spi_bitbang *spi);
|
|
--- a/include/linux/spi/spi.h
|
|
+++ b/include/linux/spi/spi.h
|
|
@@ -204,7 +204,6 @@ static inline void spi_unregister_driver
|
|
* SPI slaves, and are numbered from zero to num_chipselects.
|
|
* each slave has a chipselect signal, but it's common that not
|
|
* every chipselect is connected to a slave.
|
|
- * @dma_alignment: SPI controller constraint on DMA buffers alignment.
|
|
* @setup: updates the device mode and clocking records used by a
|
|
* device's SPI controller; protocol code may call this. This
|
|
* must fail if an unrecognized or unsupported mode is requested.
|
|
@@ -240,17 +239,7 @@ struct spi_master {
|
|
*/
|
|
u16 num_chipselect;
|
|
|
|
- /* some SPI controllers pose alignment requirements on DMAable
|
|
- * buffers; let protocol drivers know about these requirements.
|
|
- */
|
|
- u16 dma_alignment;
|
|
-
|
|
- /* Setup mode and clock, etc (spi driver may call many times).
|
|
- *
|
|
- * IMPORTANT: this may be called when transfers to another
|
|
- * device are active. DO NOT UPDATE SHARED REGISTERS in ways
|
|
- * which could break those transfers.
|
|
- */
|
|
+ /* setup mode and clock, etc (spi driver may call many times) */
|
|
int (*setup)(struct spi_device *spi);
|
|
|
|
/* bidirectional bulk transfers
|
|
@@ -275,6 +264,13 @@ struct spi_master {
|
|
int (*transfer)(struct spi_device *spi,
|
|
struct spi_message *mesg);
|
|
|
|
+ /*
|
|
+ * Synchronous non blocking transfer function. Should guarantee
|
|
+ * data availability when it returns
|
|
+ */
|
|
+ int (*transfer_sync)(struct spi_device *spi,
|
|
+ struct spi_message *mesg);
|
|
+
|
|
/* called on release() to free memory provided by spi_master */
|
|
void (*cleanup)(struct spi_device *spi);
|
|
};
|
|
@@ -584,6 +580,29 @@ spi_async(struct spi_device *spi, struct
|
|
return spi->master->transfer(spi, message);
|
|
}
|
|
|
|
+/**
|
|
+ * spi_non_blocking_transfer - Synchronous, non blocking transfer
|
|
+ * @spi: device with which data will be exchanged
|
|
+ * @message: describes the data transfers with optional completion handlers
|
|
+ * Context: any (irqs may be blocked, etc)
|
|
+ *
|
|
+ * Data is guaranteed to be written or read when this function returns.
|
|
+ *
|
|
+ * Note : This may not be supported by all spi masters.
|
|
+ */
|
|
+
|
|
+static inline int
|
|
+spi_non_blocking_transfer(struct spi_device *spi, struct spi_message *message)
|
|
+{
|
|
+ if (unlikely(!spi->master->transfer_sync)) {
|
|
+ dev_err(&spi->master->dev,
|
|
+ "non-blocking transfers not supported\n");
|
|
+ return -EIO;
|
|
+ }
|
|
+
|
|
+ return spi->master->transfer_sync(spi, message);
|
|
+}
|
|
+
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* All these synchronous SPI transfer routines are utilities layered
|