Merge branch 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next

* 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next
  spi/pxa2xx: register driver properly
  spi/pxa2xx: add support for shared IRQ handler
  spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbers
  arm/pxa2xx: reorgazine SSP and SPI header files
  spi/pxa2xx: Add CE4100 support
  spi/pxa2xx: Consider CE4100's FIFO depth
  spi/pxa2xx: Add chipselect support for Sodaville
  spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes.
  spi/pxa2xx: pass of_node to spi device and set a parent device

2 files changed, 361 insertions, 0 deletions

diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h
new file mode 100644
index 000000000000..2f691e4e6222
--- /dev/null
+++ b/include/linux/pxa2xx_ssp.h
@@ -0,0 +1,209 @@
+/*
+ *  pxa2xx_ssp.h
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * 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 driver supports the following PXA CPU/SSP ports:-
+ *
+ *       PXA250     SSP
+ *       PXA255     SSP, NSSP
+ *       PXA26x     SSP, NSSP, ASSP
+ *       PXA27x     SSP1, SSP2, SSP3
+ *       PXA3xx     SSP1, SSP2, SSP3, SSP4
+ */
+
+#ifndef __LINUX_SSP_H
+#define __LINUX_SSP_H
+
+#include <linux/list.h>
+#include <linux/io.h>
+
+/*
+ * SSP Serial Port Registers
+ * PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different.
+ * PXA255, PXA26x and PXA27x have extra ports, registers and bits.
+ */
+
+#define SSCR0           (0x00)  /* SSP Control Register 0 */
+#define SSCR1           (0x04)  /* SSP Control Register 1 */
+#define SSSR            (0x08)  /* SSP Status Register */
+#define SSITR           (0x0C)  /* SSP Interrupt Test Register */
+#define SSDR            (0x10)  /* SSP Data Write/Data Read Register */
+
+#define SSTO            (0x28)  /* SSP Time Out Register */
+#define SSPSP           (0x2C)  /* SSP Programmable Serial Protocol */
+#define SSTSA           (0x30)  /* SSP Tx Timeslot Active */
+#define SSRSA           (0x34)  /* SSP Rx Timeslot Active */
+#define SSTSS           (0x38)  /* SSP Timeslot Status */
+#define SSACD           (0x3C)  /* SSP Audio Clock Divider */
+#define SSACDD          (0x40)  /* SSP Audio Clock Dither Divider */
+
+/* Common PXA2xx bits first */
+#define SSCR0_DSS       (0x0000000f)    /* Data Size Select (mask) */
+#define SSCR0_DataSize(x)  ((x) - 1)    /* Data Size Select [4..16] */
+#define SSCR0_FRF       (0x00000030)    /* FRame Format (mask) */
+#define SSCR0_Motorola  (0x0 << 4)      /* Motorola's Serial Peripheral Interface (SPI) */
+#define SSCR0_TI        (0x1 << 4)      /* Texas Instruments' Synchronous Serial Protocol (SSP) */
+#define SSCR0_National  (0x2 << 4)      /* National Microwire */
+#define SSCR0_ECS       (1 << 6)        /* External clock select */
+#define SSCR0_SSE       (1 << 7)        /* Synchronous Serial Port Enable */
+#define SSCR0_SCR(x)    ((x) << 8)      /* Serial Clock Rate (mask) */
+
+/* PXA27x, PXA3xx */
+#define SSCR0_EDSS      (1 << 20)       /* Extended data size select */
+#define SSCR0_NCS       (1 << 21)       /* Network clock select */
+#define SSCR0_RIM       (1 << 22)       /* Receive FIFO overrrun interrupt mask */
+#define SSCR0_TUM       (1 << 23)       /* Transmit FIFO underrun interrupt mask */
+#define SSCR0_FRDC      (0x07000000)    /* Frame rate divider control (mask) */
+#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24)  /* Time slots per frame [1..8] */
+#define SSCR0_FPCKE     (1 << 29)       /* FIFO packing enable */
+#define SSCR0_ACS       (1 << 30)       /* Audio clock select */
+#define SSCR0_MOD       (1 << 31)       /* Mode (normal or network) */
+
+
+#define SSCR1_RIE       (1 << 0)        /* Receive FIFO Interrupt Enable */
+#define SSCR1_TIE       (1 << 1)        /* Transmit FIFO Interrupt Enable */
+#define SSCR1_LBM       (1 << 2)        /* Loop-Back Mode */
+#define SSCR1_SPO       (1 << 3)        /* Motorola SPI SSPSCLK polarity setting */
+#define SSCR1_SPH       (1 << 4)        /* Motorola SPI SSPSCLK phase setting */
+#define SSCR1_MWDS      (1 << 5)        /* Microwire Transmit Data Size */
+
+#define SSSR_ALT_FRM_MASK       3       /* Masks the SFRM signal number */
+#define SSSR_TNF        (1 << 2)        /* Transmit FIFO Not Full */
+#define SSSR_RNE        (1 << 3)        /* Receive FIFO Not Empty */
+#define SSSR_BSY        (1 << 4)        /* SSP Busy */
+#define SSSR_TFS        (1 << 5)        /* Transmit FIFO Service Request */
+#define SSSR_RFS        (1 << 6)        /* Receive FIFO Service Request */
+#define SSSR_ROR        (1 << 7)        /* Receive FIFO Overrun */
+
+#ifdef CONFIG_ARCH_PXA
+#define RX_THRESH_DFLT  8
+#define TX_THRESH_DFLT  8
+
+#define SSSR_TFL_MASK   (0xf << 8)      /* Transmit FIFO Level mask */
+#define SSSR_RFL_MASK   (0xf << 12)     /* Receive FIFO Level mask */
+
+#define SSCR1_TFT       (0x000003c0)    /* Transmit FIFO Threshold (mask) */
+#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */
+#define SSCR1_RFT       (0x00003c00)    /* Receive FIFO Threshold (mask) */
+#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */
+
+#else
+
+#define RX_THRESH_DFLT  2
+#define TX_THRESH_DFLT  2
+
+#define SSSR_TFL_MASK   (0x3 << 8)      /* Transmit FIFO Level mask */
+#define SSSR_RFL_MASK   (0x3 << 12)     /* Receive FIFO Level mask */
+
+#define SSCR1_TFT       (0x000000c0)    /* Transmit FIFO Threshold (mask) */
+#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..4] */
+#define SSCR1_RFT       (0x00000c00)    /* Receive FIFO Threshold (mask) */
+#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */
+#endif
+
+/* extra bits in PXA255, PXA26x and PXA27x SSP ports */
+#define SSCR0_TISSP             (1 << 4)        /* TI Sync Serial Protocol */
+#define SSCR0_PSP               (3 << 4)        /* PSP - Programmable Serial Protocol */
+#define SSCR1_TTELP             (1 << 31)       /* TXD Tristate Enable Last Phase */
+#define SSCR1_TTE               (1 << 30)       /* TXD Tristate Enable */
+#define SSCR1_EBCEI             (1 << 29)       /* Enable Bit Count Error interrupt */
+#define SSCR1_SCFR              (1 << 28)       /* Slave Clock free Running */
+#define SSCR1_ECRA              (1 << 27)       /* Enable Clock Request A */
+#define SSCR1_ECRB              (1 << 26)       /* Enable Clock request B */
+#define SSCR1_SCLKDIR           (1 << 25)       /* Serial Bit Rate Clock Direction */
+#define SSCR1_SFRMDIR           (1 << 24)       /* Frame Direction */
+#define SSCR1_RWOT              (1 << 23)       /* Receive Without Transmit */
+#define SSCR1_TRAIL             (1 << 22)       /* Trailing Byte */
+#define SSCR1_TSRE              (1 << 21)       /* Transmit Service Request Enable */
+#define SSCR1_RSRE              (1 << 20)       /* Receive Service Request Enable */
+#define SSCR1_TINTE             (1 << 19)       /* Receiver Time-out Interrupt enable */
+#define SSCR1_PINTE             (1 << 18)       /* Peripheral Trailing Byte Interupt Enable */
+#define SSCR1_IFS               (1 << 16)       /* Invert Frame Signal */
+#define SSCR1_STRF              (1 << 15)       /* Select FIFO or EFWR */
+#define SSCR1_EFWR              (1 << 14)       /* Enable FIFO Write/Read */
+
+#define SSSR_BCE                (1 << 23)       /* Bit Count Error */
+#define SSSR_CSS                (1 << 22)       /* Clock Synchronisation Status */
+#define SSSR_TUR                (1 << 21)       /* Transmit FIFO Under Run */
+#define SSSR_EOC                (1 << 20)       /* End Of Chain */
+#define SSSR_TINT               (1 << 19)       /* Receiver Time-out Interrupt */
+#define SSSR_PINT               (1 << 18)       /* Peripheral Trailing Byte Interrupt */
+
+
+#define SSPSP_SCMODE(x)         ((x) << 0)      /* Serial Bit Rate Clock Mode */
+#define SSPSP_SFRMP             (1 << 2)        /* Serial Frame Polarity */
+#define SSPSP_ETDS              (1 << 3)        /* End of Transfer data State */
+#define SSPSP_STRTDLY(x)        ((x) << 4)      /* Start Delay */
+#define SSPSP_DMYSTRT(x)        ((x) << 7)      /* Dummy Start */
+#define SSPSP_SFRMDLY(x)        ((x) << 9)      /* Serial Frame Delay */
+#define SSPSP_SFRMWDTH(x)       ((x) << 16)     /* Serial Frame Width */
+#define SSPSP_DMYSTOP(x)        ((x) << 23)     /* Dummy Stop */
+#define SSPSP_FSRT              (1 << 25)       /* Frame Sync Relative Timing */
+
+/* PXA3xx */
+#define SSPSP_EDMYSTRT(x)       ((x) << 26)     /* Extended Dummy Start */
+#define SSPSP_EDMYSTOP(x)       ((x) << 28)     /* Extended Dummy Stop */
+#define SSPSP_TIMING_MASK       (0x7f8001f0)
+
+#define SSACD_SCDB              (1 << 3)        /* SSPSYSCLK Divider Bypass */
+#define SSACD_ACPS(x)           ((x) << 4)      /* Audio clock PLL select */
+#define SSACD_ACDS(x)           ((x) << 0)      /* Audio clock divider select */
+#define SSACD_SCDX8             (1 << 7)        /* SYSCLK division ratio select */
+
+enum pxa_ssp_type {
+        SSP_UNDEFINED = 0,
+        PXA25x_SSP,  /* pxa 210, 250, 255, 26x */
+        PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
+        PXA27x_SSP,
+        PXA168_SSP,
+        CE4100_SSP,
+};
+
+struct ssp_device {
+        struct platform_device *pdev;
+        struct list_head        node;
+
+        struct clk      *clk;
+        void __iomem    *mmio_base;
+        unsigned long   phys_base;
+
+        const char      *label;
+        int             port_id;
+        int             type;
+        int             use_count;
+        int             irq;
+        int             drcmr_rx;
+        int             drcmr_tx;
+};
+
+/**
+ * pxa_ssp_write_reg - Write to a SSP register
+ *
+ * @dev: SSP device to access
+ * @reg: Register to write to
+ * @val: Value to be written.
+ */
+static inline void pxa_ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val)
+{
+        __raw_writel(val, dev->mmio_base + reg);
+}
+
+/**
+ * pxa_ssp_read_reg - Read from a SSP register
+ *
+ * @dev: SSP device to access
+ * @reg: Register to read from
+ */
+static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg)
+{
+        return __raw_readl(dev->mmio_base + reg);
+}
+
+struct ssp_device *pxa_ssp_request(int port, const char *label);
+void pxa_ssp_free(struct ssp_device *);
+#endif
diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h
new file mode 100644
index 000000000000..d3e1075f7b60
--- /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