blackfin: add bf6xx spi driver

Spi driver for bf60x is different from old one, so implement a new
driver for it.

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>

1 files changed, 240 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/mach-common/bits/spi6xx.h b/arch/blackfin/include/asm/mach-common/bits/spi6xx.h
new file mode 100644
index 0000000..3368712
--- /dev/null
+++ b/arch/blackfin/include/asm/mach-common/bits/spi6xx.h
@@ -0,0 +1,240 @@
+/*
+ * Analog Devices bfin_spi3 controller driver
+ *
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 _SPI_CHANNEL_H_
+#define _SPI_CHANNEL_H_
+
+#include <linux/types.h>
+
+/* SPI_CONTROL */
+#define SPI_CTL_EN          0x00000001 /* Enable */
+#define SPI_CTL_MSTR        0x00000002 /* Master/Slave */
+#define SPI_CTL_PSSE        0x00000004 /* controls modf error in master mode */
+#define SPI_CTL_ODM         0x00000008 /* Open Drain Mode */
+#define SPI_CTL_CPHA        0x00000010 /* Clock Phase */
+#define SPI_CTL_CPOL        0x00000020 /* Clock Polarity */
+#define SPI_CTL_ASSEL       0x00000040 /* Slave Select Pin Control */
+#define SPI_CTL_SELST       0x00000080 /* Slave Select Polarity in transfers */
+#define SPI_CTL_EMISO       0x00000100 /*Enable MISO */
+#define SPI_CTL_SIZE        0x00000600 /*Word Transfer Size */
+#define SPI_CTL_SIZE08      0x00000000 /*SIZE: 8 bits */
+#define SPI_CTL_SIZE16      0x00000200 /*SIZE: 16 bits */
+#define SPI_CTL_SIZE32      0x00000400 /*SIZE: 32 bits */
+#define SPI_CTL_LSBF        0x00001000 /*LSB First */
+#define SPI_CTL_FCEN        0x00002000 /*Flow-Control Enable */
+#define SPI_CTL_FCCH        0x00004000 /*Flow-Control Channel Selection */
+#define SPI_CTL_FCPL        0x00008000 /*Flow-Control Polarity */
+#define SPI_CTL_FCWM        0x00030000 /*Flow-Control Water-Mark */
+#define SPI_CTL_FIFO0       0x00000000 /*FCWM: Tx empty or Rx Full */
+#define SPI_CTL_FIFO1       0x00010000 /*FCWM: Tx empty or Rx full (>=75%) */
+#define SPI_CTL_FIFO2       0x00020000 /*FCWM: Tx empty or Rx full (>=50%) */
+#define SPI_CTL_FMODE       0x00040000 /*Fast-mode Enable */
+#define SPI_CTL_MIOM        0x00300000 /*Multiple I/O Mode */
+#define SPI_CTL_MIO_DIS     0x00000000 /*MIOM: Disable */
+#define SPI_CTL_MIO_DUAL    0x00100000 /*MIOM: Enable DIOM (Dual I/O Mode) */
+#define SPI_CTL_MIO_QUAD    0x00200000 /*MIOM: Enable QUAD (Quad SPI Mode) */
+#define SPI_CTL_SOSI        0x00400000 /*Start on MOSI */
+/* SPI_RX_CONTROL */
+#define SPI_RXCTL_REN       0x00000001 /*Receive Channel Enable */
+#define SPI_RXCTL_RTI       0x00000004 /*Receive Transfer Initiate */
+#define SPI_RXCTL_RWCEN     0x00000008 /*Receive Word Counter Enable */
+#define SPI_RXCTL_RDR       0x00000070 /*Receive Data Request */
+#define SPI_RXCTL_RDR_DIS   0x00000000 /*RDR: Disabled */
+#define SPI_RXCTL_RDR_NE    0x00000010 /*RDR: RFIFO not empty */
+#define SPI_RXCTL_RDR_25    0x00000020 /*RDR: RFIFO 25% full */
+#define SPI_RXCTL_RDR_50    0x00000030 /*RDR: RFIFO 50% full */
+#define SPI_RXCTL_RDR_75    0x00000040 /*RDR: RFIFO 75% full */
+#define SPI_RXCTL_RDR_FULL  0x00000050 /*RDR: RFIFO full */
+#define SPI_RXCTL_RDO       0x00000100 /*Receive Data Over-Run */
+#define SPI_RXCTL_RRWM      0x00003000 /*FIFO Regular Water-Mark */
+#define SPI_RXCTL_RWM_0     0x00000000 /*RRWM: RFIFO Empty */
+#define SPI_RXCTL_RWM_25    0x00001000 /*RRWM: RFIFO 25% full */
+#define SPI_RXCTL_RWM_50    0x00002000 /*RRWM: RFIFO 50% full */
+#define SPI_RXCTL_RWM_75    0x00003000 /*RRWM: RFIFO 75% full */
+#define SPI_RXCTL_RUWM      0x00070000 /*FIFO Urgent Water-Mark */
+#define SPI_RXCTL_UWM_DIS   0x00000000 /*RUWM: Disabled */
+#define SPI_RXCTL_UWM_25    0x00010000 /*RUWM: RFIFO 25% full */
+#define SPI_RXCTL_UWM_50    0x00020000 /*RUWM: RFIFO 50% full */
+#define SPI_RXCTL_UWM_75    0x00030000 /*RUWM: RFIFO 75% full */
+#define SPI_RXCTL_UWM_FULL  0x00040000 /*RUWM: RFIFO full */
+/* SPI_TX_CONTROL */
+#define SPI_TXCTL_TEN       0x00000001 /*Transmit Channel Enable */
+#define SPI_TXCTL_TTI       0x00000004 /*Transmit Transfer Initiate */
+#define SPI_TXCTL_TWCEN     0x00000008 /*Transmit Word Counter Enable */
+#define SPI_TXCTL_TDR       0x00000070 /*Transmit Data Request */
+#define SPI_TXCTL_TDR_DIS   0x00000000 /*TDR: Disabled */
+#define SPI_TXCTL_TDR_NF    0x00000010 /*TDR: TFIFO not full */
+#define SPI_TXCTL_TDR_25    0x00000020 /*TDR: TFIFO 25% empty */
+#define SPI_TXCTL_TDR_50    0x00000030 /*TDR: TFIFO 50% empty */
+#define SPI_TXCTL_TDR_75    0x00000040 /*TDR: TFIFO 75% empty */
+#define SPI_TXCTL_TDR_EMPTY 0x00000050 /*TDR: TFIFO empty */
+#define SPI_TXCTL_TDU       0x00000100 /*Transmit Data Under-Run */
+#define SPI_TXCTL_TRWM      0x00003000 /*FIFO Regular Water-Mark */
+#define SPI_TXCTL_RWM_FULL  0x00000000 /*TRWM: TFIFO full */
+#define SPI_TXCTL_RWM_25    0x00001000 /*TRWM: TFIFO 25% empty */
+#define SPI_TXCTL_RWM_50    0x00002000 /*TRWM: TFIFO 50% empty */
+#define SPI_TXCTL_RWM_75    0x00003000 /*TRWM: TFIFO 75% empty */
+#define SPI_TXCTL_TUWM      0x00070000 /*FIFO Urgent Water-Mark */
+#define SPI_TXCTL_UWM_DIS   0x00000000 /*TUWM: Disabled */
+#define SPI_TXCTL_UWM_25    0x00010000 /*TUWM: TFIFO 25% empty */
+#define SPI_TXCTL_UWM_50    0x00020000 /*TUWM: TFIFO 50% empty */
+#define SPI_TXCTL_UWM_75    0x00030000 /*TUWM: TFIFO 75% empty */
+#define SPI_TXCTL_UWM_EMPTY 0x00040000 /*TUWM: TFIFO empty */
+/* SPI_CLOCK */
+#define SPI_CLK_BAUD        0x0000FFFF /*Baud Rate */
+/* SPI_DELAY */
+#define SPI_DLY_STOP        0x000000FF /*Transfer delay time */
+#define SPI_DLY_LEADX       0x00000100 /*Extended (1 SCK) LEAD Control */
+#define SPI_DLY_LAGX        0x00000200 /*Extended (1 SCK) LAG control */
+/* SPI_SSEL */
+#define SPI_SLVSEL_SSE1     0x00000002 /*SPISSEL1 Enable */
+#define SPI_SLVSEL_SSE2     0x00000004 /*SPISSEL2 Enable */
+#define SPI_SLVSEL_SSE3     0x00000008 /*SPISSEL3 Enable */
+#define SPI_SLVSEL_SSE4     0x00000010 /*SPISSEL4 Enable */
+#define SPI_SLVSEL_SSE5     0x00000020 /*SPISSEL5 Enable */
+#define SPI_SLVSEL_SSE6     0x00000040 /*SPISSEL6 Enable */
+#define SPI_SLVSEL_SSE7     0x00000080 /*SPISSEL7 Enable */
+#define SPI_SLVSEL_SSEL1    0x00000200 /*SPISSEL1 Value */
+#define SPI_SLVSEL_SSEL2    0x00000400 /*SPISSEL2 Value */
+#define SPI_SLVSEL_SSEL3    0x00000800 /*SPISSEL3 Value */
+#define SPI_SLVSEL_SSEL4    0x00001000 /*SPISSEL4 Value */
+#define SPI_SLVSEL_SSEL5    0x00002000 /*SPISSEL5 Value */
+#define SPI_SLVSEL_SSEL6    0x00004000 /*SPISSEL6 Value */
+#define SPI_SLVSEL_SSEL7    0x00008000 /*SPISSEL7 Value */
+/* SPI_RWC */
+#define SPI_RWC_VALUE       0x0000FFFF /*Received Word-Count */
+/* SPI_RWCR */
+#define SPI_RWCR_VALUE      0x0000FFFF /*Received Word-Count Reload */
+/* SPI_TWC */
+#define SPI_TWC_VALUE       0x0000FFFF /*Transmitted Word-Count */
+/* SPI_TWCR */
+#define SPI_TWCR_VALUE      0x0000FFFF /*Transmitted Word-Count Reload */
+/* SPI_IMASK */
+#define SPI_IMSK_RUWM       0x00000002 /*Receive Water-Mark Interrupt Mask */
+#define SPI_IMSK_TUWM       0x00000004 /*Transmit Water-Mark Interrupt Mask */
+#define SPI_IMSK_ROM        0x00000010 /*Receive Over-Run Interrupt Mask */
+#define SPI_IMSK_TUM        0x00000020 /*Transmit Under-Run Interrupt Mask */
+#define SPI_IMSK_TCM        0x00000040 /*Transmit Collision Interrupt Mask */
+#define SPI_IMSK_MFM        0x00000080 /*Mode Fault Interrupt Mask */
+#define SPI_IMSK_RSM        0x00000100 /*Receive Start Interrupt Mask */
+#define SPI_IMSK_TSM        0x00000200 /*Transmit Start Interrupt Mask */
+#define SPI_IMSK_RFM        0x00000400 /*Receive Finish Interrupt Mask */
+#define SPI_IMSK_TFM        0x00000800 /*Transmit Finish Interrupt Mask */
+/* SPI_IMASKCL */
+#define SPI_IMSK_CLR_RUW    0x00000002 /*Receive Water-Mark Interrupt Mask */
+#define SPI_IMSK_CLR_TUWM   0x00000004 /*Transmit Water-Mark Interrupt Mask */
+#define SPI_IMSK_CLR_ROM    0x00000010 /*Receive Over-Run Interrupt Mask */
+#define SPI_IMSK_CLR_TUM    0x00000020 /*Transmit Under-Run Interrupt Mask */
+#define SPI_IMSK_CLR_TCM    0x00000040 /*Transmit Collision Interrupt Mask */
+#define SPI_IMSK_CLR_MFM    0x00000080 /*Mode Fault Interrupt Mask */
+#define SPI_IMSK_CLR_RSM    0x00000100 /*Receive Start Interrupt Mask */
+#define SPI_IMSK_CLR_TSM    0x00000200 /*Transmit Start Interrupt Mask */
+#define SPI_IMSK_CLR_RFM    0x00000400 /*Receive Finish Interrupt Mask */
+#define SPI_IMSK_CLR_TFM    0x00000800 /*Transmit Finish Interrupt Mask */
+/* SPI_IMASKST */
+#define SPI_IMSK_SET_RUWM   0x00000002 /*Receive Water-Mark Interrupt Mask */
+#define SPI_IMSK_SET_TUWM   0x00000004 /*Transmit Water-Mark Interrupt Mask */
+#define SPI_IMSK_SET_ROM    0x00000010 /*Receive Over-Run Interrupt Mask */
+#define SPI_IMSK_SET_TUM    0x00000020 /*Transmit Under-Run Interrupt Mask */
+#define SPI_IMSK_SET_TCM    0x00000040 /*Transmit Collision Interrupt Mask */
+#define SPI_IMSK_SET_MFM    0x00000080 /*Mode Fault Interrupt Mask */
+#define SPI_IMSK_SET_RSM    0x00000100 /*Receive Start Interrupt Mask */
+#define SPI_IMSK_SET_TSM    0x00000200 /*Transmit Start Interrupt Mask */
+#define SPI_IMSK_SET_RFM    0x00000400 /*Receive Finish Interrupt Mask */
+#define SPI_IMSK_SET_TFM    0x00000800 /*Transmit Finish Interrupt Mask */
+/* SPI_STATUS */
+#define SPI_STAT_SPIF       0x00000001 /*SPI Finished */
+#define SPI_STAT_RUWM       0x00000002 /*Receive Water-Mark Breached */
+#define SPI_STAT_TUWM       0x00000004 /*Transmit Water-Mark Breached */
+#define SPI_STAT_ROE        0x00000010 /*Receive Over-Run Indication */
+#define SPI_STAT_TUE        0x00000020 /*Transmit Under-Run Indication */
+#define SPI_STAT_TCE        0x00000040 /*Transmit Collision Indication */
+#define SPI_STAT_MODF       0x00000080 /*Mode Fault Indication */
+#define SPI_STAT_RS         0x00000100 /*Receive Start Indication */
+#define SPI_STAT_TS         0x00000200 /*Transmit Start Indication */
+#define SPI_STAT_RF         0x00000400 /*Receive Finish Indication */
+#define SPI_STAT_TF         0x00000800 /*Transmit Finish Indication */
+#define SPI_STAT_RFS        0x00007000 /*SPI_RFIFO status */
+#define SPI_STAT_RFIFO_EMPTY 0x00000000 /*RFS: RFIFO Empty */
+#define SPI_STAT_RFIFO_25   0x00001000 /*RFS: RFIFO 25% Full */
+#define SPI_STAT_RFIFO_50   0x00002000 /*RFS: RFIFO 50% Full */
+#define SPI_STAT_RFIFO_75   0x00003000 /*RFS: RFIFO 75% Full */
+#define SPI_STAT_RFIFO_FULL 0x00004000 /*RFS: RFIFO Full */
+#define SPI_STAT_TFS        0x00070000 /*SPI_TFIFO status */
+#define SPI_STAT_TFIFO_FULL 0x00000000 /*TFS: TFIFO full */
+#define SPI_STAT_TFIFO_25   0x00010000 /*TFS: TFIFO 25% empty */
+#define SPI_STAT_TFIFO_50   0x00020000 /*TFS: TFIFO 50% empty */
+#define SPI_STAT_TFIFO_75   0x00030000 /*TFS: TFIFO 75% empty */
+#define SPI_STAT_TFIFO_EMPTY 0x00040000 /*TFS: TFIFO empty */
+#define SPI_STAT_FCS        0x00100000 /*Flow-Control Stall Indication */
+#define SPI_STAT_RFE        0x00400000 /*SPI_RFIFO Empty */
+#define SPI_STAT_TFF        0x00800000 /*SPI_TFIFO Full */
+/* SPI_ILAT */
+#define SPI_ILAT_RUWMI      0x00000002 /*Receive Water Mark Interrupt */
+#define SPI_ILAT_TUWMI      0x00000004 /*Transmit Water Mark Interrupt */
+#define SPI_ILAT_ROI        0x00000010 /*Receive Over-Run Indication */
+#define SPI_ILAT_TUI        0x00000020 /*Transmit Under-Run Indication */
+#define SPI_ILAT_TCI        0x00000040 /*Transmit Collision Indication */
+#define SPI_ILAT_MFI        0x00000080 /*Mode Fault Indication */
+#define SPI_ILAT_RSI        0x00000100 /*Receive Start Indication */
+#define SPI_ILAT_TSI        0x00000200 /*Transmit Start Indication */
+#define SPI_ILAT_RFI        0x00000400 /*Receive Finish Indication */
+#define SPI_ILAT_TFI        0x00000800 /*Transmit Finish Indication */
+/* SPI_ILATCL */
+#define SPI_ILAT_CLR_RUWMI  0x00000002 /*Receive Water Mark Interrupt */
+#define SPI_ILAT_CLR_TUWMI  0x00000004 /*Transmit Water Mark Interrupt */
+#define SPI_ILAT_CLR_ROI    0x00000010 /*Receive Over-Run Indication */
+#define SPI_ILAT_CLR_TUI    0x00000020 /*Transmit Under-Run Indication */
+#define SPI_ILAT_CLR_TCI    0x00000040 /*Transmit Collision Indication */
+#define SPI_ILAT_CLR_MFI    0x00000080 /*Mode Fault Indication */
+#define SPI_ILAT_CLR_RSI    0x00000100 /*Receive Start Indication */
+#define SPI_ILAT_CLR_TSI    0x00000200 /*Transmit Start Indication */
+#define SPI_ILAT_CLR_RFI    0x00000400 /*Receive Finish Indication */
+#define SPI_ILAT_CLR_TFI    0x00000800 /*Transmit Finish Indication */
+
+/*
+ * bfin spi3 registers layout
+ */
+struct bfin_spi_regs {
+	u32 revid;
+	u32 control;
+	u32 rx_control;
+	u32 tx_control;
+	u32 clock;
+	u32 delay;
+	u32 ssel;
+	u32 rwc;
+	u32 rwcr;
+	u32 twc;
+	u32 twcr;
+	u32 reserved0;
+	u32 emask;
+	u32 emaskcl;
+	u32 emaskst;
+	u32 reserved1;
+	u32 status;
+	u32 elat;
+	u32 elatcl;
+	u32 reserved2;
+	u32 rfifo;
+	u32 reserved3;
+	u32 tfifo;
+};
+
+#endif /* _SPI_CHANNEL_H_ */