arch/arm/mach-omap2/mux.h

   1 /*
   2  * Copyright (C) 2009 Nokia
   3  * Copyright (C) 2009-2010 Texas Instruments
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include "mux2420.h"
  11 #include "mux2430.h"
  12 #include "mux34xx.h"
  13 #include "mux44xx.h"
  14
  15 #define OMAP_MUX_TERMINATOR     0xffff
  16
  17 /* 34xx mux mode options for each pin. See TRM for options */
  18 #define OMAP_MUX_MODE0      0
  19 #define OMAP_MUX_MODE1      1
  20 #define OMAP_MUX_MODE2      2
  21 #define OMAP_MUX_MODE3      3
  22 #define OMAP_MUX_MODE4      4
  23 #define OMAP_MUX_MODE5      5
  24 #define OMAP_MUX_MODE6      6
  25 #define OMAP_MUX_MODE7      7
  26
  27 /* 24xx/34xx mux bit defines */
  28 #define OMAP_PULL_ENA                   (1 << 3)
  29 #define OMAP_PULL_UP                    (1 << 4)
  30 #define OMAP_ALTELECTRICALSEL           (1 << 5)
  31
  32 /* 34xx specific mux bit defines */
  33 #define OMAP_INPUT_EN                   (1 << 8)
  34 #define OMAP_OFF_EN                     (1 << 9)
  35 #define OMAP_OFFOUT_EN                  (1 << 10)
  36 #define OMAP_OFFOUT_VAL                 (1 << 11)
  37 #define OMAP_OFF_PULL_EN                (1 << 12)
  38 #define OMAP_OFF_PULL_UP                (1 << 13)
  39 #define OMAP_WAKEUP_EN                  (1 << 14)
  40
  41 /* 44xx specific mux bit defines */
  42 #define OMAP_WAKEUP_EVENT               (1 << 15)
  43
  44 /* Active pin states */
  45 #define OMAP_PIN_OUTPUT                 0
  46 #define OMAP_PIN_INPUT                  OMAP_INPUT_EN
  47 #define OMAP_PIN_INPUT_PULLUP           (OMAP_PULL_ENA | OMAP_INPUT_EN \
  48                                                 | OMAP_PULL_UP)
  49 #define OMAP_PIN_INPUT_PULLDOWN         (OMAP_PULL_ENA | OMAP_INPUT_EN)
  50
  51 /* Off mode states */
  52 #define OMAP_PIN_OFF_NONE               0
  53 #define OMAP_PIN_OFF_OUTPUT_HIGH        (OMAP_OFF_EN | OMAP_OFFOUT_EN \
  54                                                 | OMAP_OFFOUT_VAL)
  55 #define OMAP_PIN_OFF_OUTPUT_LOW         (OMAP_OFF_EN | OMAP_OFFOUT_EN)
  56 #define OMAP_PIN_OFF_INPUT_PULLUP       (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
  57                                                 | OMAP_OFF_PULL_UP)
  58 #define OMAP_PIN_OFF_INPUT_PULLDOWN     (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
  59 #define OMAP_PIN_OFF_WAKEUPENABLE       OMAP_WAKEUP_EN
  60
  61 #define OMAP_MODE_GPIO(x)       (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
  62
  63 /* Flags for omapX_mux_init */
  64 #define OMAP_PACKAGE_MASK               0xffff
  65 #define OMAP_PACKAGE_CBS                8               /* 547-pin 0.40 0.40 */
  66 #define OMAP_PACKAGE_CBL                7               /* 547-pin 0.40 0.40 */
  67 #define OMAP_PACKAGE_CBP                6               /* 515-pin 0.40 0.50 */
  68 #define OMAP_PACKAGE_CUS                5               /* 423-pin 0.65 */
  69 #define OMAP_PACKAGE_CBB                4               /* 515-pin 0.40 0.50 */
  70 #define OMAP_PACKAGE_CBC                3               /* 515-pin 0.50 0.65 */
  71 #define OMAP_PACKAGE_ZAC                2               /* 24xx 447-pin POP */
  72 #define OMAP_PACKAGE_ZAF                1               /* 2420 447-pin SIP */
  73
  74
  75 #define OMAP_MUX_NR_MODES               8               /* Available modes */
  76 #define OMAP_MUX_NR_SIDES               2               /* Bottom & top */
  77
  78 /*
  79  * omap_mux_init flags definition:
  80  *
  81  * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
  82  * The default value is 16 bits.
  83  * OMAP_MUX_GPIO_IN_MODE3: The GPIO is selected in mode3.
  84  * The default is mode4.
  85  */
  86 #define OMAP_MUX_REG_8BIT               (1 << 0)
  87 #define OMAP_MUX_GPIO_IN_MODE3          (1 << 1)
  88
  89 /**
  90  * struct omap_board_data - board specific device data
  91  * @id: instance id
  92  * @flags: additional flags for platform init code
  93  * @pads: array of device specific pads
  94  * @pads_cnt: ARRAY_SIZE() of pads
  95  */
  96 struct omap_board_data {
  97         int                     id;
  98         u32                     flags;
  99         struct omap_device_pad  *pads;
 100         int                     pads_cnt;
 101 };
 102
 103 /**
 104  * struct mux_partition - contain partition related information
 105  * @name: name of the current partition
 106  * @flags: flags specific to this partition
 107  * @phys: physical address
 108  * @size: partition size
 109  * @base: virtual address after ioremap
 110  * @muxmodes: list of nodes that belong to a partition
 111  * @node: list node for the partitions linked list
 112  */
 113 struct omap_mux_partition {
 114         const char              *name;
 115         u32                     flags;
 116         u32                     phys;
 117         u32                     size;
 118         void __iomem            *base;
 119         struct list_head        muxmodes;
 120         struct list_head        node;
 121 };
 122
 123 /**
 124  * struct omap_mux - data for omap mux register offset and it's value
 125  * @reg_offset: mux register offset from the mux base
 126  * @gpio:       GPIO number
 127  * @muxnames:   available signal modes for a ball
 128  * @balls:      available balls on the package
 129  * @partition:  mux partition
 130  */
 131 struct omap_mux {
 132         u16     reg_offset;
 133         u16     gpio;
 134 #ifdef CONFIG_OMAP_MUX
 135         char    *muxnames[OMAP_MUX_NR_MODES];
 136 #ifdef CONFIG_DEBUG_FS
 137         char    *balls[OMAP_MUX_NR_SIDES];
 138 #endif
 139 #endif
 140 };
 141
 142 /**
 143  * struct omap_ball - data for balls on omap package
 144  * @reg_offset: mux register offset from the mux base
 145  * @balls:      available balls on the package
 146  */
 147 struct omap_ball {
 148         u16     reg_offset;
 149         char    *balls[OMAP_MUX_NR_SIDES];
 150 };
 151
 152 /**
 153  * struct omap_board_mux - data for initializing mux registers
 154  * @reg_offset: mux register offset from the mux base
 155  * @mux_value:  desired mux value to set
 156  */
 157 struct omap_board_mux {
 158         u16     reg_offset;
 159         u16     value;
 160 };
 161
 162 #define OMAP_DEVICE_PAD_REMUX           BIT(1)  /* Dynamically remux a pad,
 163                                                    needs enable, idle and off
 164                                                    values */
 165 #define OMAP_DEVICE_PAD_WAKEUP          BIT(0)  /* Pad is wake-up capable */
 166
 167 /**
 168  * struct omap_device_pad - device specific pad configuration
 169  * @name:               signal name
 170  * @flags:              pad specific runtime flags
 171  * @enable:             runtime value for a pad
 172  * @idle:               idle value for a pad
 173  * @off:                off value for a pad, defaults to safe mode
 174  * @partition:          mux partition
 175  * @mux:                mux register
 176  */
 177 struct omap_device_pad {
 178         char                            *name;
 179         u8                              flags;
 180         u16                             enable;
 181         u16                             idle;
 182         u16                             off;
 183         struct omap_mux_partition       *partition;
 184         struct omap_mux                 *mux;
 185 };
 186
 187 struct omap_hwmod_mux_info;
 188
 189 #define OMAP_MUX_STATIC(signal, mode)                                   \
 190 {                                                                       \
 191         .name   = (signal),                                             \
 192         .enable = (mode),                                               \
 193 }
 194
 195 #if defined(CONFIG_OMAP_MUX)
 196
 197 /**
 198  * omap_mux_init_gpio - initialize a signal based on the GPIO number
 199  * @gpio:               GPIO number
 200  * @val:                Options for the mux register value
 201  */
 202 int omap_mux_init_gpio(int gpio, int val);
 203
 204 /**
 205  * omap_mux_init_signal - initialize a signal based on the signal name
 206  * @muxname:            Mux name in mode0_name.signal_name format
 207  * @val:                Options for the mux register value
 208  */
 209 int omap_mux_init_signal(const char *muxname, int val);
 210
 211 /**
 212  * omap_hwmod_mux_init - initialize hwmod specific mux data
 213  * @bpads:              Board specific device signal names
 214  * @nr_pads:            Number of signal names for the device
 215  */
 216 extern struct omap_hwmod_mux_info *
 217 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
 218
 219 /**
 220  * omap_hwmod_mux - omap hwmod specific pin muxing
 221  * @hmux:               Pads for a hwmod
 222  * @state:              Desired _HWMOD_STATE
 223  *
 224  * Called only from omap_hwmod.c, do not use.
 225  */
 226 void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state);
 227
 228 #else
 229
 230 static inline int omap_mux_init_gpio(int gpio, int val)
 231 {
 232         return 0;
 233 }
 234 static inline int omap_mux_init_signal(char *muxname, int val)
 235 {
 236         return 0;
 237 }
 238
 239 static inline struct omap_hwmod_mux_info *
 240 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
 241 {
 242         return NULL;
 243 }
 244
 245 static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
 246 {
 247 }
 248
 249 static struct omap_board_mux *board_mux __maybe_unused;
 250
 251 #endif
 252
 253 /**
 254  * omap_mux_get_gpio() - get mux register value based on GPIO number
 255  * @gpio:               GPIO number
 256  *
 257  */
 258 u16 omap_mux_get_gpio(int gpio);
 259
 260 /**
 261  * omap_mux_set_gpio() - set mux register value based on GPIO number
 262  * @val:                New mux register value
 263  * @gpio:               GPIO number
 264  *
 265  */
 266 void omap_mux_set_gpio(u16 val, int gpio);
 267
 268 /**
 269  * omap_mux_get() - get a mux partition by name
 270  * @name:               Name of the mux partition
 271  *
 272  */
 273 struct omap_mux_partition *omap_mux_get(const char *name);
 274
 275 /**
 276  * omap_mux_read() - read mux register
 277  * @partition:          Mux partition
 278  * @mux_offset:         Offset of the mux register
 279  *
 280  */
 281 u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
 282
 283 /**
 284  * omap_mux_write() - write mux register
 285  * @partition:          Mux partition
 286  * @val:                New mux register value
 287  * @mux_offset:         Offset of the mux register
 288  *
 289  * This should be only needed for dynamic remuxing of non-gpio signals.
 290  */
 291 void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
 292
 293 /**
 294  * omap_mux_write_array() - write an array of mux registers
 295  * @partition:          Mux partition
 296  * @board_mux:          Array of mux registers terminated by MAP_MUX_TERMINATOR
 297  *
 298  * This should be only needed for dynamic remuxing of non-gpio signals.
 299  */
 300 void omap_mux_write_array(struct omap_mux_partition *p,
 301                           struct omap_board_mux *board_mux);
 302
 303 /**
 304  * omap2420_mux_init() - initialize mux system with board specific set
 305  * @board_mux:          Board specific mux table
 306  * @flags:              OMAP package type used for the board
 307  */
 308 int omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
 309
 310 /**
 311  * omap2430_mux_init() - initialize mux system with board specific set
 312  * @board_mux:          Board specific mux table
 313  * @flags:              OMAP package type used for the board
 314  */
 315 int omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
 316
 317 /**
 318  * omap3_mux_init() - initialize mux system with board specific set
 319  * @board_mux:          Board specific mux table
 320  * @flags:              OMAP package type used for the board
 321  */
 322 int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
 323
 324 /**
 325  * omap4_mux_init() - initialize mux system with board specific set
 326  * @board_subset:       Board specific mux table
 327  * @board_wkup_subset:  Board specific mux table for wakeup instance
 328  * @flags:              OMAP package type used for the board
 329  */
 330 int omap4_mux_init(struct omap_board_mux *board_subset,
 331         struct omap_board_mux *board_wkup_subset, int flags);
 332
 333 /**
 334  * omap_mux_init - private mux init function, do not call
 335  */
 336 int omap_mux_init(const char *name, u32 flags,
 337                   u32 mux_pbase, u32 mux_size,
 338                   struct omap_mux *superset,
 339                   struct omap_mux *package_subset,
 340                   struct omap_board_mux *board_mux,
 341                   struct omap_ball *package_balls);
 342