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 "mux34xx.h"
  11
  12 #define OMAP_MUX_TERMINATOR     0xffff
  13
  14 /* 34xx mux mode options for each pin. See TRM for options */
  15 #define OMAP_MUX_MODE0      0
  16 #define OMAP_MUX_MODE1      1
  17 #define OMAP_MUX_MODE2      2
  18 #define OMAP_MUX_MODE3      3
  19 #define OMAP_MUX_MODE4      4
  20 #define OMAP_MUX_MODE5      5
  21 #define OMAP_MUX_MODE6      6
  22 #define OMAP_MUX_MODE7      7
  23
  24 /* 24xx/34xx mux bit defines */
  25 #define OMAP_PULL_ENA                   (1 << 3)
  26 #define OMAP_PULL_UP                    (1 << 4)
  27 #define OMAP_ALTELECTRICALSEL           (1 << 5)
  28
  29 /* omap3/4/5 specific mux bit defines */
  30 #define OMAP_INPUT_EN                   (1 << 8)
  31 #define OMAP_OFF_EN                     (1 << 9)
  32 #define OMAP_OFFOUT_EN                  (1 << 10)
  33 #define OMAP_OFFOUT_VAL                 (1 << 11)
  34 #define OMAP_OFF_PULL_EN                (1 << 12)
  35 #define OMAP_OFF_PULL_UP                (1 << 13)
  36 #define OMAP_WAKEUP_EN                  (1 << 14)
  37 #define OMAP_WAKEUP_EVENT               (1 << 15)
  38
  39 /* Active pin states */
  40 #define OMAP_PIN_OUTPUT                 0
  41 #define OMAP_PIN_INPUT                  OMAP_INPUT_EN
  42 #define OMAP_PIN_INPUT_PULLUP           (OMAP_PULL_ENA | OMAP_INPUT_EN \
  43                                                 | OMAP_PULL_UP)
  44 #define OMAP_PIN_INPUT_PULLDOWN         (OMAP_PULL_ENA | OMAP_INPUT_EN)
  45
  46 /* Off mode states */
  47 #define OMAP_PIN_OFF_NONE               0
  48 #define OMAP_PIN_OFF_OUTPUT_HIGH        (OMAP_OFF_EN | OMAP_OFFOUT_EN \
  49                                                 | OMAP_OFFOUT_VAL)
  50 #define OMAP_PIN_OFF_OUTPUT_LOW         (OMAP_OFF_EN | OMAP_OFFOUT_EN)
  51 #define OMAP_PIN_OFF_INPUT_PULLUP       (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
  52                                                 | OMAP_OFF_PULL_UP)
  53 #define OMAP_PIN_OFF_INPUT_PULLDOWN     (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
  54 #define OMAP_PIN_OFF_WAKEUPENABLE       OMAP_WAKEUP_EN
  55
  56 #define OMAP_MODE_GPIO(partition, x)    (((x) & OMAP_MUX_MODE7) == \
  57                                           partition->gpio)
  58 #define OMAP_MODE_UART(x)       (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE0)
  59
  60 /* Flags for omapX_mux_init */
  61 #define OMAP_PACKAGE_MASK               0xffff
  62 #define OMAP_PACKAGE_CBP                6               /* 515-pin 0.40 0.50 */
  63 #define OMAP_PACKAGE_CUS                5               /* 423-pin 0.65 */
  64 #define OMAP_PACKAGE_CBB                4               /* 515-pin 0.40 0.50 */
  65 #define OMAP_PACKAGE_CBC                3               /* 515-pin 0.50 0.65 */
  66
  67 #define OMAP_MUX_NR_MODES               8               /* Available modes */
  68 #define OMAP_MUX_NR_SIDES               2               /* Bottom & top */
  69
  70 /*
  71  * omap_mux_init flags definition:
  72  *
  73  * OMAP_GPIO_MUX_MODE, bits 0-2: gpio muxing mode, same like pad control
  74  *      register which includes values from 0-7.
  75  * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
  76  * The default value is 16 bits.
  77  */
  78 #define OMAP_MUX_GPIO_IN_MODE0          OMAP_MUX_MODE0
  79 #define OMAP_MUX_GPIO_IN_MODE1          OMAP_MUX_MODE1
  80 #define OMAP_MUX_GPIO_IN_MODE2          OMAP_MUX_MODE2
  81 #define OMAP_MUX_GPIO_IN_MODE3          OMAP_MUX_MODE3
  82 #define OMAP_MUX_GPIO_IN_MODE4          OMAP_MUX_MODE4
  83 #define OMAP_MUX_GPIO_IN_MODE5          OMAP_MUX_MODE5
  84 #define OMAP_MUX_GPIO_IN_MODE6          OMAP_MUX_MODE6
  85 #define OMAP_MUX_GPIO_IN_MODE7          OMAP_MUX_MODE7
  86 #define OMAP_MUX_REG_8BIT               (1 << 3)
  87
  88 /**
  89  * struct omap_board_data - board specific device data
  90  * @id: instance id
  91  * @flags: additional flags for platform init code
  92  * @pads: array of device specific pads
  93  * @pads_cnt: ARRAY_SIZE() of pads
  94  */
  95 struct omap_board_data {
  96         int                     id;
  97         u32                     flags;
  98         struct omap_device_pad  *pads;
  99         int                     pads_cnt;
 100 };
 101
 102 /**
 103  * struct mux_partition - contain partition related information
 104  * @name: name of the current partition
 105  * @flags: flags specific to this partition
 106  * @gpio: gpio mux mode
 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                     gpio;
 117         u32                     phys;
 118         u32                     size;
 119         void __iomem            *base;
 120         struct list_head        muxmodes;
 121         struct list_head        node;
 122 };
 123
 124 /**
 125  * struct omap_mux - data for omap mux register offset and it's value
 126  * @reg_offset: mux register offset from the mux base
 127  * @gpio:       GPIO number
 128  * @muxnames:   available signal modes for a ball
 129  * @balls:      available balls on the package
 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 int omap_mux_get_by_name(const char *muxname,
 229                 struct omap_mux_partition **found_partition,
 230                 struct omap_mux **found_mux);
 231 #else
 232
 233 static inline int omap_mux_get_by_name(const char *muxname,
 234                 struct omap_mux_partition **found_partition,
 235                 struct omap_mux **found_mux)
 236 {
 237         return 0;
 238 }
 239
 240 static inline int omap_mux_init_gpio(int gpio, int val)
 241 {
 242         return 0;
 243 }
 244 static inline int omap_mux_init_signal(char *muxname, int val)
 245 {
 246         return 0;
 247 }
 248
 249 static inline struct omap_hwmod_mux_info *
 250 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
 251 {
 252         return NULL;
 253 }
 254
 255 static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
 256 {
 257 }
 258
 259 static struct omap_board_mux *board_mux __maybe_unused;
 260
 261 #endif
 262
 263 /**
 264  * omap_mux_get_gpio() - get mux register value based on GPIO number
 265  * @gpio:               GPIO number
 266  *
 267  */
 268 u16 omap_mux_get_gpio(int gpio);
 269
 270 /**
 271  * omap_mux_set_gpio() - set mux register value based on GPIO number
 272  * @val:                New mux register value
 273  * @gpio:               GPIO number
 274  *
 275  */
 276 void omap_mux_set_gpio(u16 val, int gpio);
 277
 278 /**
 279  * omap_mux_get() - get a mux partition by name
 280  * @name:               Name of the mux partition
 281  *
 282  */
 283 struct omap_mux_partition *omap_mux_get(const char *name);
 284
 285 /**
 286  * omap_mux_read() - read mux register
 287  * @partition:          Mux partition
 288  * @mux_offset:         Offset of the mux register
 289  *
 290  */
 291 u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
 292
 293 /**
 294  * omap_mux_write() - write mux register
 295  * @partition:          Mux partition
 296  * @val:                New mux register value
 297  * @mux_offset:         Offset of the mux register
 298  *
 299  * This should be only needed for dynamic remuxing of non-gpio signals.
 300  */
 301 void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
 302
 303 /**
 304  * omap_mux_write_array() - write an array of mux registers
 305  * @partition:          Mux partition
 306  * @board_mux:          Array of mux registers terminated by MAP_MUX_TERMINATOR
 307  *
 308  * This should be only needed for dynamic remuxing of non-gpio signals.
 309  */
 310 void omap_mux_write_array(struct omap_mux_partition *p,
 311                           struct omap_board_mux *board_mux);
 312
 313 /**
 314  * omap2420_mux_init() - initialize mux system with board specific set
 315  * @board_mux:          Board specific mux table
 316  * @flags:              OMAP package type used for the board
 317  */
 318 int omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
 319
 320 /**
 321  * omap2430_mux_init() - initialize mux system with board specific set
 322  * @board_mux:          Board specific mux table
 323  * @flags:              OMAP package type used for the board
 324  */
 325 int omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
 326
 327 /**
 328  * omap3_mux_init() - initialize mux system with board specific set
 329  * @board_mux:          Board specific mux table
 330  * @flags:              OMAP package type used for the board
 331  */
 332 int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
 333
 334 /**
 335  * omap4_mux_init() - initialize mux system with board specific set
 336  * @board_subset:       Board specific mux table
 337  * @board_wkup_subset:  Board specific mux table for wakeup instance
 338  * @flags:              OMAP package type used for the board
 339  */
 340 int omap4_mux_init(struct omap_board_mux *board_subset,
 341         struct omap_board_mux *board_wkup_subset, int flags);
 342
 343 /**
 344  * omap_mux_init - private mux init function, do not call
 345  */
 346 int omap_mux_init(const char *name, u32 flags,
 347                   u32 mux_pbase, u32 mux_size,
 348                   struct omap_mux *superset,
 349                   struct omap_mux *package_subset,
 350                   struct omap_board_mux *board_mux,
 351                   struct omap_ball *package_balls);
 352