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 #define OMAP_PACKAGE_ZAC                2               /* 24xx 447-pin POP */
  67 #define OMAP_PACKAGE_ZAF                1               /* 2420 447-pin SIP */
  68
  69
  70 #define OMAP_MUX_NR_MODES               8               /* Available modes */
  71 #define OMAP_MUX_NR_SIDES               2               /* Bottom & top */
  72
  73 /*
  74  * omap_mux_init flags definition:
  75  *
  76  * OMAP_GPIO_MUX_MODE, bits 0-2: gpio muxing mode, same like pad control
  77  *      register which includes values from 0-7.
  78  * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
  79  * The default value is 16 bits.
  80  */
  81 #define OMAP_MUX_GPIO_IN_MODE0          OMAP_MUX_MODE0
  82 #define OMAP_MUX_GPIO_IN_MODE1          OMAP_MUX_MODE1
  83 #define OMAP_MUX_GPIO_IN_MODE2          OMAP_MUX_MODE2
  84 #define OMAP_MUX_GPIO_IN_MODE3          OMAP_MUX_MODE3
  85 #define OMAP_MUX_GPIO_IN_MODE4          OMAP_MUX_MODE4
  86 #define OMAP_MUX_GPIO_IN_MODE5          OMAP_MUX_MODE5
  87 #define OMAP_MUX_GPIO_IN_MODE6          OMAP_MUX_MODE6
  88 #define OMAP_MUX_GPIO_IN_MODE7          OMAP_MUX_MODE7
  89 #define OMAP_MUX_REG_8BIT               (1 << 3)
  90
  91 /**
  92  * struct omap_board_data - board specific device data
  93  * @id: instance id
  94  * @flags: additional flags for platform init code
  95  * @pads: array of device specific pads
  96  * @pads_cnt: ARRAY_SIZE() of pads
  97  */
  98 struct omap_board_data {
  99         int                     id;
 100         u32                     flags;
 101         struct omap_device_pad  *pads;
 102         int                     pads_cnt;
 103 };
 104
 105 /**
 106  * struct mux_partition - contain partition related information
 107  * @name: name of the current partition
 108  * @flags: flags specific to this partition
 109  * @gpio: gpio mux mode
 110  * @phys: physical address
 111  * @size: partition size
 112  * @base: virtual address after ioremap
 113  * @muxmodes: list of nodes that belong to a partition
 114  * @node: list node for the partitions linked list
 115  */
 116 struct omap_mux_partition {
 117         const char              *name;
 118         u32                     flags;
 119         u32                     gpio;
 120         u32                     phys;
 121         u32                     size;
 122         void __iomem            *base;
 123         struct list_head        muxmodes;
 124         struct list_head        node;
 125 };
 126
 127 /**
 128  * struct omap_mux - data for omap mux register offset and it's value
 129  * @reg_offset: mux register offset from the mux base
 130  * @gpio:       GPIO number
 131  * @muxnames:   available signal modes for a ball
 132  * @balls:      available balls on the package
 133  */
 134 struct omap_mux {
 135         u16     reg_offset;
 136         u16     gpio;
 137 #ifdef CONFIG_OMAP_MUX
 138         char    *muxnames[OMAP_MUX_NR_MODES];
 139 #ifdef CONFIG_DEBUG_FS
 140         char    *balls[OMAP_MUX_NR_SIDES];
 141 #endif
 142 #endif
 143 };
 144
 145 /**
 146  * struct omap_ball - data for balls on omap package
 147  * @reg_offset: mux register offset from the mux base
 148  * @balls:      available balls on the package
 149  */
 150 struct omap_ball {
 151         u16     reg_offset;
 152         char    *balls[OMAP_MUX_NR_SIDES];
 153 };
 154
 155 /**
 156  * struct omap_board_mux - data for initializing mux registers
 157  * @reg_offset: mux register offset from the mux base
 158  * @mux_value:  desired mux value to set
 159  */
 160 struct omap_board_mux {
 161         u16     reg_offset;
 162         u16     value;
 163 };
 164
 165 #define OMAP_DEVICE_PAD_REMUX           BIT(1)  /* Dynamically remux a pad,
 166                                                    needs enable, idle and off
 167                                                    values */
 168 #define OMAP_DEVICE_PAD_WAKEUP          BIT(0)  /* Pad is wake-up capable */
 169
 170 /**
 171  * struct omap_device_pad - device specific pad configuration
 172  * @name:               signal name
 173  * @flags:              pad specific runtime flags
 174  * @enable:             runtime value for a pad
 175  * @idle:               idle value for a pad
 176  * @off:                off value for a pad, defaults to safe mode
 177  * @partition:          mux partition
 178  * @mux:                mux register
 179  */
 180 struct omap_device_pad {
 181         char                            *name;
 182         u8                              flags;
 183         u16                             enable;
 184         u16                             idle;
 185         u16                             off;
 186         struct omap_mux_partition       *partition;
 187         struct omap_mux                 *mux;
 188 };
 189
 190 struct omap_hwmod_mux_info;
 191
 192 #define OMAP_MUX_STATIC(signal, mode)                                   \
 193 {                                                                       \
 194         .name   = (signal),                                             \
 195         .enable = (mode),                                               \
 196 }
 197
 198 #if defined(CONFIG_OMAP_MUX)
 199
 200 /**
 201  * omap_mux_init_gpio - initialize a signal based on the GPIO number
 202  * @gpio:               GPIO number
 203  * @val:                Options for the mux register value
 204  */
 205 int omap_mux_init_gpio(int gpio, int val);
 206
 207 /**
 208  * omap_mux_init_signal - initialize a signal based on the signal name
 209  * @muxname:            Mux name in mode0_name.signal_name format
 210  * @val:                Options for the mux register value
 211  */
 212 int omap_mux_init_signal(const char *muxname, int val);
 213
 214 /**
 215  * omap_hwmod_mux_init - initialize hwmod specific mux data
 216  * @bpads:              Board specific device signal names
 217  * @nr_pads:            Number of signal names for the device
 218  */
 219 extern struct omap_hwmod_mux_info *
 220 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
 221
 222 /**
 223  * omap_hwmod_mux - omap hwmod specific pin muxing
 224  * @hmux:               Pads for a hwmod
 225  * @state:              Desired _HWMOD_STATE
 226  *
 227  * Called only from omap_hwmod.c, do not use.
 228  */
 229 void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state);
 230
 231 int omap_mux_get_by_name(const char *muxname,
 232                 struct omap_mux_partition **found_partition,
 233                 struct omap_mux **found_mux);
 234 #else
 235
 236 static inline int omap_mux_get_by_name(const char *muxname,
 237                 struct omap_mux_partition **found_partition,
 238                 struct omap_mux **found_mux)
 239 {
 240         return 0;
 241 }
 242
 243 static inline int omap_mux_init_gpio(int gpio, int val)
 244 {
 245         return 0;
 246 }
 247 static inline int omap_mux_init_signal(char *muxname, int val)
 248 {
 249         return 0;
 250 }
 251
 252 static inline struct omap_hwmod_mux_info *
 253 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
 254 {
 255         return NULL;
 256 }
 257
 258 static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
 259 {
 260 }
 261
 262 static struct omap_board_mux *board_mux __maybe_unused;
 263
 264 #endif
 265
 266 /**
 267  * omap_mux_get_gpio() - get mux register value based on GPIO number
 268  * @gpio:               GPIO number
 269  *
 270  */
 271 u16 omap_mux_get_gpio(int gpio);
 272
 273 /**
 274  * omap_mux_set_gpio() - set mux register value based on GPIO number
 275  * @val:                New mux register value
 276  * @gpio:               GPIO number
 277  *
 278  */
 279 void omap_mux_set_gpio(u16 val, int gpio);
 280
 281 /**
 282  * omap_mux_get() - get a mux partition by name
 283  * @name:               Name of the mux partition
 284  *
 285  */
 286 struct omap_mux_partition *omap_mux_get(const char *name);
 287
 288 /**
 289  * omap_mux_read() - read mux register
 290  * @partition:          Mux partition
 291  * @mux_offset:         Offset of the mux register
 292  *
 293  */
 294 u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
 295
 296 /**
 297  * omap_mux_write() - write mux register
 298  * @partition:          Mux partition
 299  * @val:                New mux register value
 300  * @mux_offset:         Offset of the mux register
 301  *
 302  * This should be only needed for dynamic remuxing of non-gpio signals.
 303  */
 304 void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
 305
 306 /**
 307  * omap_mux_write_array() - write an array of mux registers
 308  * @partition:          Mux partition
 309  * @board_mux:          Array of mux registers terminated by MAP_MUX_TERMINATOR
 310  *
 311  * This should be only needed for dynamic remuxing of non-gpio signals.
 312  */
 313 void omap_mux_write_array(struct omap_mux_partition *p,
 314                           struct omap_board_mux *board_mux);
 315
 316 /**
 317  * omap2420_mux_init() - initialize mux system with board specific set
 318  * @board_mux:          Board specific mux table
 319  * @flags:              OMAP package type used for the board
 320  */
 321 int omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
 322
 323 /**
 324  * omap2430_mux_init() - initialize mux system with board specific set
 325  * @board_mux:          Board specific mux table
 326  * @flags:              OMAP package type used for the board
 327  */
 328 int omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
 329
 330 /**
 331  * omap3_mux_init() - initialize mux system with board specific set
 332  * @board_mux:          Board specific mux table
 333  * @flags:              OMAP package type used for the board
 334  */
 335 int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
 336
 337 /**
 338  * omap4_mux_init() - initialize mux system with board specific set
 339  * @board_subset:       Board specific mux table
 340  * @board_wkup_subset:  Board specific mux table for wakeup instance
 341  * @flags:              OMAP package type used for the board
 342  */
 343 int omap4_mux_init(struct omap_board_mux *board_subset,
 344         struct omap_board_mux *board_wkup_subset, int flags);
 345
 346 /**
 347  * omap_mux_init - private mux init function, do not call
 348  */
 349 int omap_mux_init(const char *name, u32 flags,
 350                   u32 mux_pbase, u32 mux_size,
 351                   struct omap_mux *superset,
 352                   struct omap_mux *package_subset,
 353                   struct omap_board_mux *board_mux,
 354                   struct omap_ball *package_balls);
 355