include/linux/mfd/ti_ssp.h

   1 /*
   2  * Sequencer Serial Port (SSP) driver for Texas Instruments' SoCs
   3  *
   4  * Copyright (C) 2010 Texas Instruments Inc
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef __TI_SSP_H__
  22 #define __TI_SSP_H__
  23
  24 struct ti_ssp_dev_data {
  25         const char      *dev_name;
  26         void            *pdata;
  27         size_t          pdata_size;
  28 };
  29
  30 struct ti_ssp_data {
  31         unsigned long           out_clock;
  32         struct ti_ssp_dev_data  dev_data[2];
  33 };
  34
  35 struct ti_ssp_spi_data {
  36         unsigned long   iosel;
  37         int             num_cs;
  38         void            (*select)(int cs);
  39 };
  40
  41 /*
  42  * Sequencer port IO pin configuration bits.  These do not correlate 1-1 with
  43  * the hardware.  The iosel field in the port data combines iosel1 and iosel2,
  44  * and is therefore not a direct map to register space.  It is best to use the
  45  * macros below to construct iosel values.
  46  *
  47  * least significant 16 bits --> iosel1
  48  * most significant 16 bits  --> iosel2
  49  */
  50
  51 #define SSP_IN                  0x0000
  52 #define SSP_DATA                0x0001
  53 #define SSP_CLOCK               0x0002
  54 #define SSP_CHIPSEL             0x0003
  55 #define SSP_OUT                 0x0004
  56 #define SSP_PIN_SEL(pin, v)     ((v) << ((pin) * 3))
  57 #define SSP_PIN_MASK(pin)       SSP_PIN_SEL(pin, 0x7)
  58 #define SSP_INPUT_SEL(pin)      ((pin) << 16)
  59
  60 /* Sequencer port config bits */
  61 #define SSP_EARLY_DIN           BIT(8)
  62 #define SSP_DELAY_DOUT          BIT(9)
  63
  64 /* Sequence map definitions */
  65 #define SSP_CLK_HIGH            BIT(0)
  66 #define SSP_CLK_LOW             0
  67 #define SSP_DATA_HIGH           BIT(1)
  68 #define SSP_DATA_LOW            0
  69 #define SSP_CS_HIGH             BIT(2)
  70 #define SSP_CS_LOW              0
  71 #define SSP_OUT_MODE            BIT(3)
  72 #define SSP_IN_MODE             0
  73 #define SSP_DATA_REG            BIT(4)
  74 #define SSP_ADDR_REG            0
  75
  76 #define SSP_OPCODE_DIRECT       ((0x0) << 5)
  77 #define SSP_OPCODE_TOGGLE       ((0x1) << 5)
  78 #define SSP_OPCODE_SHIFT        ((0x2) << 5)
  79 #define SSP_OPCODE_BRANCH0      ((0x4) << 5)
  80 #define SSP_OPCODE_BRANCH1      ((0x5) << 5)
  81 #define SSP_OPCODE_BRANCH       ((0x6) << 5)
  82 #define SSP_OPCODE_STOP         ((0x7) << 5)
  83 #define SSP_BRANCH(addr)        ((addr) << 8)
  84 #define SSP_COUNT(cycles)       ((cycles) << 8)
  85
  86 int ti_ssp_raw_read(struct device *dev);
  87 int ti_ssp_raw_write(struct device *dev, u32 val);
  88 int ti_ssp_load(struct device *dev, int offs, u32* prog, int len);
  89 int ti_ssp_run(struct device *dev, u32 pc, u32 input, u32 *output);
  90 int ti_ssp_set_mode(struct device *dev, int mode);
  91 int ti_ssp_set_iosel(struct device *dev, u32 iosel);
  92
  93 #endif /* __TI_SSP_H__ */