blackfin architecture

This adds support for the Analog Devices Blackfin processor architecture, and
currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
(Dual Core) devices, with a variety of development platforms including those
avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
BF561-EZKIT), and Bluetechnix!  Tinyboards.

The Blackfin architecture was jointly developed by Intel and Analog Devices
Inc.  (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
December of 2000.  Since then ADI has put this core into its Blackfin
processor family of devices.  The Blackfin core has the advantages of a clean,
orthogonal,RISC-like microprocessor instruction set.  It combines a dual-MAC
(Multiply/Accumulate), state-of-the-art signal processing engine and
single-instruction, multiple-data (SIMD) multimedia capabilities into a single
instruction-set architecture.

The Blackfin architecture, including the instruction set, is described by the
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf

The Blackfin processor is already supported by major releases of gcc, and
there are binary and source rpms/tarballs for many architectures at:
http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
documentation, including "getting started" guides available at:
http://docs.blackfin.uclinux.org/ which provides links to the sources and
patches you will need in order to set up a cross-compiling environment for
bfin-linux-uclibc

This patch, as well as the other patches (toolchain, distribution,
uClibc) are actively supported by Analog Devices Inc, at:
http://blackfin.uclinux.org/

We have tested this on LTP, and our test plan (including pass/fails) can
be found at:
http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel

[m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 170 insertions, 0 deletions

diff --git a/include/asm-blackfin/bfin5xx_spi.h b/include/asm-blackfin/bfin5xx_spi.h
new file mode 100644
index 000000000000..95c1c952e7c1
--- /dev/null
+++ b/include/asm-blackfin/bfin5xx_spi.h
@@ -0,0 +1,170 @@
+/************************************************************
+*
+* Copyright (C) 2004, Analog Devices. All Rights Reserved
+*
+* FILE bfin5xx_spi.h
+* PROGRAMMER(S): Luke Yang (Analog Devices Inc.)
+*
+*
+* DATE OF CREATION: March. 10th 2006
+*
+* SYNOPSIS:
+*
+* DESCRIPTION: header file for SPI controller driver for Blackfin5xx.
+**************************************************************
+
+* MODIFICATION HISTORY:
+* March 10, 2006  bfin5xx_spi.h Created. (Luke Yang)
+
+************************************************************/
+
+#ifndef _SPI_CHANNEL_H_
+#define _SPI_CHANNEL_H_
+
+#define SPI0_REGBASE       0xffc00500
+
+#define SPI_READ              0
+#define SPI_WRITE             1
+
+#define SPI_CTRL_OFF            0x0
+#define SPI_FLAG_OFF            0x4
+#define SPI_STAT_OFF            0x8
+#define SPI_TXBUFF_OFF          0xc
+#define SPI_RXBUFF_OFF          0x10
+#define SPI_BAUD_OFF            0x14
+#define SPI_SHAW_OFF            0x18
+
+#define CMD_SPI_OUT_ENABLE    1
+#define CMD_SPI_SET_BAUDRATE  2
+#define CMD_SPI_SET_POLAR     3
+#define CMD_SPI_SET_PHASE     4
+#define CMD_SPI_SET_MASTER    5
+#define CMD_SPI_SET_SENDOPT   6
+#define CMD_SPI_SET_RECVOPT   7
+#define CMD_SPI_SET_ORDER     8
+#define CMD_SPI_SET_LENGTH16  9
+#define CMD_SPI_GET_STAT      11
+#define CMD_SPI_GET_CFG       12
+#define CMD_SPI_SET_CSAVAIL   13
+#define CMD_SPI_SET_CSHIGH    14        /* CS unavail */
+#define CMD_SPI_SET_CSLOW     15        /* CS avail */
+#define CMD_SPI_MISO_ENABLE   16
+#define CMD_SPI_SET_CSENABLE  17
+#define CMD_SPI_SET_CSDISABLE 18
+
+#define CMD_SPI_SET_TRIGGER_MODE  19
+#define CMD_SPI_SET_TRIGGER_SENSE 20
+#define CMD_SPI_SET_TRIGGER_EDGE  21
+#define CMD_SPI_SET_TRIGGER_LEVEL 22
+
+#define CMD_SPI_SET_TIME_SPS      23
+#define CMD_SPI_SET_TIME_SAMPLES  24
+#define CMD_SPI_GET_SYSTEMCLOCK   25
+
+#define CMD_SPI_SET_WRITECONTINUOUS     26
+#define CMD_SPI_SET_SKFS                27
+
+#define CMD_SPI_GET_ALLCONFIG 32        /* For debug */
+
+#define SPI_DEFAULT_BARD    0x0100
+
+#define SPI0_IRQ_NUM        IRQ_SPI
+#define SPI_ERR_TRIG       -1
+
+#define BIT_CTL_ENABLE      0x4000
+#define BIT_CTL_OPENDRAIN   0x2000
+#define BIT_CTL_MASTER      0x1000
+#define BIT_CTL_POLAR       0x0800
+#define BIT_CTL_PHASE       0x0400
+#define BIT_CTL_BITORDER    0x0200
+#define BIT_CTL_WORDSIZE    0x0100
+#define BIT_CTL_MISOENABLE  0x0020
+#define BIT_CTL_RXMOD       0x0000
+#define BIT_CTL_TXMOD       0x0001
+#define BIT_CTL_TIMOD_DMA_TX 0x0003
+#define BIT_CTL_TIMOD_DMA_RX 0x0002
+#define BIT_CTL_SENDOPT     0x0004
+#define BIT_CTL_TIMOD       0x0003
+
+#define BIT_STAT_SPIF       0x0001
+#define BIT_STAT_MODF       0x0002
+#define BIT_STAT_TXE        0x0004
+#define BIT_STAT_TXS        0x0008
+#define BIT_STAT_RBSY       0x0010
+#define BIT_STAT_RXS        0x0020
+#define BIT_STAT_TXCOL      0x0040
+#define BIT_STAT_CLR        0xFFFF
+
+#define BIT_STU_SENDOVER    0x0001
+#define BIT_STU_RECVFULL    0x0020
+
+#define CFG_SPI_ENABLE      1
+#define CFG_SPI_DISABLE     0
+
+#define CFG_SPI_OUTENABLE   1
+#define CFG_SPI_OUTDISABLE  0
+
+#define CFG_SPI_ACTLOW      1
+#define CFG_SPI_ACTHIGH     0
+
+#define CFG_SPI_PHASESTART  1
+#define CFG_SPI_PHASEMID    0
+
+#define CFG_SPI_MASTER      1
+#define CFG_SPI_SLAVE       0
+
+#define CFG_SPI_SENELAST    0
+#define CFG_SPI_SENDZERO    1
+
+#define CFG_SPI_RCVFLUSH    1
+#define CFG_SPI_RCVDISCARD  0
+
+#define CFG_SPI_LSBFIRST    1
+#define CFG_SPI_MSBFIRST    0
+
+#define CFG_SPI_WORDSIZE16  1
+#define CFG_SPI_WORDSIZE8   0
+
+#define CFG_SPI_MISOENABLE   1
+#define CFG_SPI_MISODISABLE  0
+
+#define CFG_SPI_READ      0x00
+#define CFG_SPI_WRITE     0x01
+#define CFG_SPI_DMAREAD   0x02
+#define CFG_SPI_DMAWRITE  0x03
+
+#define CFG_SPI_CSCLEARALL  0
+#define CFG_SPI_CHIPSEL1    1
+#define CFG_SPI_CHIPSEL2    2
+#define CFG_SPI_CHIPSEL3    3
+#define CFG_SPI_CHIPSEL4    4
+#define CFG_SPI_CHIPSEL5    5
+#define CFG_SPI_CHIPSEL6    6
+#define CFG_SPI_CHIPSEL7    7
+
+#define CFG_SPI_CS1VALUE    1
+#define CFG_SPI_CS2VALUE    2
+#define CFG_SPI_CS3VALUE    3
+#define CFG_SPI_CS4VALUE    4
+#define CFG_SPI_CS5VALUE    5
+#define CFG_SPI_CS6VALUE    6
+#define CFG_SPI_CS7VALUE    7
+
+/* device.platform_data for SSP controller devices */
+struct bfin5xx_spi_master {
+        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 bfin5xx_spi_chip {
+        u16 ctl_reg;
+        u8 enable_dma;
+        u8 bits_per_word;
+        u8 cs_change_per_word;
+        u8 cs_chg_udelay;
+};
+
+#endif /* _SPI_CHANNEL_H_ */