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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 17:08:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 17:08:46 -0800
commit021db8e2bde53024a163fb4417a185de46fe77aa (patch)
tree098a28bd2414ea2622493a1736a677dab5085dfc /include/linux/spi
parent72eb6a791459c87a0340318840bb3bd9252b627b (diff)
parent07fe0351702b6f0c9749e80cdbcb758686b0fe9b (diff)
Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (77 commits) spi/omap: Fix DMA API usage in OMAP MCSPI driver spi/imx: correct the test on platform_get_irq() return value spi/topcliff: Typo fix threhold to threshold spi/dw_spi Typo change diable to disable. spi/fsl_espi: change the read behaviour of the SPIRF spi/mpc52xx-psc-spi: move probe/remove to proper sections spi/dw_spi: add DMA support spi/dw_spi: change to EXPORT_SYMBOL_GPL for exported APIs spi/dw_spi: Fix too short timeout in spi polling loop spi/pl022: convert running variable spi/pl022: convert busy flag to a bool spi/pl022: pass the returned sglen to the DMA engine spi/pl022: map the buffers on the DMA engine spi/topcliff_pch: Fix data transfer issue spi/imx: remove autodetection spi/pxa2xx: pass of_node to spi device and set a parent device spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes. spi/pxa2xx: Add chipselect support for Sodaville spi/pxa2xx: Consider CE4100's FIFO depth spi/pxa2xx: Add CE4100 support ...
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/dw_spi.h24
-rw-r--r--include/linux/spi/pxa2xx_spi.h152
2 files changed, 171 insertions, 5 deletions
diff --git a/include/linux/spi/dw_spi.h b/include/linux/spi/dw_spi.h
index c91302f3a25..6cd10f6ad47 100644
--- a/include/linux/spi/dw_spi.h
+++ b/include/linux/spi/dw_spi.h
@@ -1,5 +1,6 @@
#ifndef DW_SPI_HEADER_H
#define DW_SPI_HEADER_H
+
#include <linux/io.h>
/* Bit fields in CTRLR0 */
@@ -82,6 +83,13 @@ struct dw_spi_reg {
though only low 16 bits matters */
} __packed;
+struct dw_spi;
+struct dw_spi_dma_ops {
+ int (*dma_init)(struct dw_spi *dws);
+ void (*dma_exit)(struct dw_spi *dws);
+ int (*dma_transfer)(struct dw_spi *dws, int cs_change);
+};
+
struct dw_spi {
struct spi_master *master;
struct spi_device *cur_dev;
@@ -136,13 +144,15 @@ struct dw_spi {
/* Dma info */
int dma_inited;
struct dma_chan *txchan;
+ struct scatterlist tx_sgl;
struct dma_chan *rxchan;
- int txdma_done;
- int rxdma_done;
- u64 tx_param;
- u64 rx_param;
+ struct scatterlist rx_sgl;
+ int dma_chan_done;
struct device *dma_dev;
- dma_addr_t dma_addr;
+ dma_addr_t dma_addr; /* phy address of the Data register */
+ struct dw_spi_dma_ops *dma_ops;
+ void *dma_priv; /* platform relate info */
+ struct pci_dev *dmac;
/* Bus interface info */
void *priv;
@@ -216,4 +226,8 @@ extern int dw_spi_add_host(struct dw_spi *dws);
extern void dw_spi_remove_host(struct dw_spi *dws);
extern int dw_spi_suspend_host(struct dw_spi *dws);
extern int dw_spi_resume_host(struct dw_spi *dws);
+extern void dw_spi_xfer_done(struct dw_spi *dws);
+
+/* platform related setup */
+extern int dw_spi_mid_init(struct dw_spi *dws); /* Intel MID platforms */
#endif /* DW_SPI_HEADER_H */
diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h
new file mode 100644
index 00000000000..d3e1075f7b6
--- /dev/null
+++ b/include/linux/spi/pxa2xx_spi.h
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef __linux_pxa2xx_spi_h
+#define __linux_pxa2xx_spi_h
+
+#include <linux/pxa2xx_ssp.h>
+
+#define PXA2XX_CS_ASSERT (0x01)
+#define PXA2XX_CS_DEASSERT (0x02)
+
+/* device.platform_data for SSP controller devices */
+struct pxa2xx_spi_master {
+ u32 clock_enable;
+ u16 num_chipselect;
+ u8 enable_dma;
+};
+
+/* spi_board_info.controller_data for SPI slave devices,
+ * copied to spi_device.platform_data ... mostly for dma tuning
+ */
+struct pxa2xx_spi_chip {
+ u8 tx_threshold;
+ u8 rx_threshold;
+ u8 dma_burst_size;
+ u32 timeout;
+ u8 enable_loopback;
+ int gpio_cs;
+ void (*cs_control)(u32 command);
+};
+
+#ifdef CONFIG_ARCH_PXA
+
+#include <linux/clk.h>
+#include <mach/dma.h>
+
+extern void pxa2xx_set_spi_info(unsigned id, struct pxa2xx_spi_master *info);
+
+#else
+/*
+ * This is the implemtation for CE4100 on x86. ARM defines them in mach/ or
+ * plat/ include path.
+ * The CE4100 does not provide DMA support. This bits are here to let the driver
+ * compile and will never be used. Maybe we get DMA support at a later point in
+ * time.
+ */
+
+#define DCSR(n) (n)
+#define DSADR(n) (n)
+#define DTADR(n) (n)
+#define DCMD(n) (n)
+#define DRCMR(n) (n)
+
+#define DCSR_RUN (1 << 31) /* Run Bit */
+#define DCSR_NODESC (1 << 30) /* No-Descriptor Fetch */
+#define DCSR_STOPIRQEN (1 << 29) /* Stop Interrupt Enable */
+#define DCSR_REQPEND (1 << 8) /* Request Pending (read-only) */
+#define DCSR_STOPSTATE (1 << 3) /* Stop State (read-only) */
+#define DCSR_ENDINTR (1 << 2) /* End Interrupt */
+#define DCSR_STARTINTR (1 << 1) /* Start Interrupt */
+#define DCSR_BUSERR (1 << 0) /* Bus Error Interrupt */
+
+#define DCSR_EORIRQEN (1 << 28) /* End of Receive Interrupt Enable */
+#define DCSR_EORJMPEN (1 << 27) /* Jump to next descriptor on EOR */
+#define DCSR_EORSTOPEN (1 << 26) /* STOP on an EOR */
+#define DCSR_SETCMPST (1 << 25) /* Set Descriptor Compare Status */
+#define DCSR_CLRCMPST (1 << 24) /* Clear Descriptor Compare Status */
+#define DCSR_CMPST (1 << 10) /* The Descriptor Compare Status */
+#define DCSR_EORINTR (1 << 9) /* The end of Receive */
+
+#define DRCMR_MAPVLD (1 << 7) /* Map Valid */
+#define DRCMR_CHLNUM 0x1f /* mask for Channel Number */
+
+#define DDADR_DESCADDR 0xfffffff0 /* Address of next descriptor */
+#define DDADR_STOP (1 << 0) /* Stop */
+
+#define DCMD_INCSRCADDR (1 << 31) /* Source Address Increment Setting. */
+#define DCMD_INCTRGADDR (1 << 30) /* Target Address Increment Setting. */
+#define DCMD_FLOWSRC (1 << 29) /* Flow Control by the source. */
+#define DCMD_FLOWTRG (1 << 28) /* Flow Control by the target. */
+#define DCMD_STARTIRQEN (1 << 22) /* Start Interrupt Enable */
+#define DCMD_ENDIRQEN (1 << 21) /* End Interrupt Enable */
+#define DCMD_ENDIAN (1 << 18) /* Device Endian-ness. */
+#define DCMD_BURST8 (1 << 16) /* 8 byte burst */
+#define DCMD_BURST16 (2 << 16) /* 16 byte burst */
+#define DCMD_BURST32 (3 << 16) /* 32 byte burst */
+#define DCMD_WIDTH1 (1 << 14) /* 1 byte width */
+#define DCMD_WIDTH2 (2 << 14) /* 2 byte width (HalfWord) */
+#define DCMD_WIDTH4 (3 << 14) /* 4 byte width (Word) */
+#define DCMD_LENGTH 0x01fff /* length mask (max = 8K - 1) */
+
+/*
+ * Descriptor structure for PXA's DMA engine
+ * Note: this structure must always be aligned to a 16-byte boundary.
+ */
+
+typedef enum {
+ DMA_PRIO_HIGH = 0,
+ DMA_PRIO_MEDIUM = 1,
+ DMA_PRIO_LOW = 2
+} pxa_dma_prio;
+
+/*
+ * DMA registration
+ */
+
+static inline int pxa_request_dma(char *name,
+ pxa_dma_prio prio,
+ void (*irq_handler)(int, void *),
+ void *data)
+{
+ return -ENODEV;
+}
+
+static inline void pxa_free_dma(int dma_ch)
+{
+}
+
+/*
+ * The CE4100 does not have the clk framework implemented and SPI clock can
+ * not be switched on/off or the divider changed.
+ */
+static inline void clk_disable(struct clk *clk)
+{
+}
+
+static inline int clk_enable(struct clk *clk)
+{
+ return 0;
+}
+
+static inline unsigned long clk_get_rate(struct clk *clk)
+{
+ return 3686400;
+}
+
+#endif
+#endif