From 2f529f9b558ca1c1bd74be7437a84e4711743404 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 01 Nov 2024 02:11:33 +0000
Subject: [PATCH] add xenomai
---
kernel/include/linux/spi/spi.h | 99 +++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 99 insertions(+), 0 deletions(-)
diff --git a/kernel/include/linux/spi/spi.h b/kernel/include/linux/spi/spi.h
index f50c766..04f35c4 100644
--- a/kernel/include/linux/spi/spi.h
+++ b/kernel/include/linux/spi/spi.h
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
+#include <linux/dmaengine.h>
#include <linux/kthread.h>
#include <linux/completion.h>
#include <linux/scatterlist.h>
@@ -253,6 +254,7 @@
struct spi_message;
struct spi_transfer;
+struct spi_oob_transfer;
/**
* struct spi_driver - Host side "protocol" driver
@@ -352,6 +354,7 @@
* @io_mutex: mutex for physical bus access
* @bus_lock_spinlock: spinlock for SPI bus locking
* @bus_lock_mutex: mutex for exclusion of multiple callers
+ * @bus_oob_lock_sem: semaphore for exclusion during oob operations
* @bus_lock_flag: indicates that the SPI bus is locked for exclusive use
* @setup: updates the device mode and clocking records used by a
* device's SPI controller; protocol code may call this. This
@@ -534,6 +537,10 @@
spinlock_t bus_lock_spinlock;
struct mutex bus_lock_mutex;
+#ifdef CONFIG_SPI_OOB
+ struct semaphore bus_oob_lock_sem;
+#endif
+
/* flag indicating that the SPI bus is locked for exclusive use */
bool bus_lock_flag;
@@ -626,6 +633,14 @@
int (*unprepare_message)(struct spi_controller *ctlr,
struct spi_message *message);
int (*slave_abort)(struct spi_controller *ctlr);
+ int (*prepare_oob_transfer)(struct spi_controller *ctlr,
+ struct spi_oob_transfer *xfer);
+ void (*start_oob_transfer)(struct spi_controller *ctlr,
+ struct spi_oob_transfer *xfer);
+ void (*pulse_oob_transfer)(struct spi_controller *ctlr,
+ struct spi_oob_transfer *xfer);
+ void (*terminate_oob_transfer)(struct spi_controller *ctlr,
+ struct spi_oob_transfer *xfer);
/*
* These hooks are for drivers that use a generic implementation
@@ -1137,6 +1152,90 @@
kfree(m);
}
+struct spi_oob_transfer {
+ struct spi_device *spi;
+ dma_addr_t dma_addr;
+ size_t aligned_frame_len;
+ void *io_buffer; /* 2 x aligned_frame_len */
+ struct dma_async_tx_descriptor *txd;
+ struct dma_async_tx_descriptor *rxd;
+ u32 effective_speed_hz;
+ /*
+ * Caller-defined settings for the transfer.
+ */
+ struct spi_oob_setup {
+ u32 frame_len;
+ u32 speed_hz;
+ u8 bits_per_word;
+ dma_async_tx_callback xfer_done;
+ } setup;
+};
+
+static inline off_t spi_get_oob_rxoff(struct spi_oob_transfer *xfer)
+{
+ /* RX area is in first half of the I/O buffer. */
+ return 0;
+}
+
+static inline off_t spi_get_oob_txoff(struct spi_oob_transfer *xfer)
+{
+ /* TX area is in second half of the I/O buffer. */
+ return xfer->aligned_frame_len;
+}
+
+static inline size_t spi_get_oob_iolen(struct spi_oob_transfer *xfer)
+{
+ return xfer->aligned_frame_len * 2;
+}
+
+#ifdef CONFIG_SPI_OOB
+
+struct vm_area_struct;
+
+int spi_prepare_oob_transfer(struct spi_device *spi,
+ struct spi_oob_transfer *xfer);
+
+void spi_start_oob_transfer(struct spi_oob_transfer *xfer);
+
+int spi_pulse_oob_transfer(struct spi_oob_transfer *xfer);
+
+void spi_terminate_oob_transfer(struct spi_oob_transfer *xfer);
+
+int spi_mmap_oob_transfer(struct vm_area_struct *vma,
+ struct spi_oob_transfer *xfer);
+
+#else
+
+static inline
+int spi_prepare_oob_transfer(struct spi_device *spi,
+ struct spi_oob_transfer *xfer)
+{
+ return -ENOTSUPP;
+}
+
+static inline
+void spi_start_oob_transfer(struct spi_oob_transfer *xfer)
+{ }
+
+static inline
+int spi_pulse_oob_transfer(struct spi_oob_transfer *xfer)
+{
+ return -EIO;
+}
+
+static inline
+void spi_terminate_oob_transfer(struct spi_oob_transfer *xfer)
+{ }
+
+static inline
+int spi_mmap_oob_transfer(struct vm_area_struct *vma,
+ struct spi_oob_transfer *xfer)
+{
+ return -ENXIO;
+}
+
+#endif
+
extern int spi_set_cs_timing(struct spi_device *spi,
struct spi_delay *setup,
struct spi_delay *hold,
--
Gitblit v1.6.2