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
  14 #define OMAP_MUX_TERMINATOR     0xffff
  15
  16 /* 34xx mux mode options for each pin. See TRM for options */
  17 #define OMAP_MUX_MODE0      0
  18 #define OMAP_MUX_MODE1      1
  19 #define OMAP_MUX_MODE2      2
  20 #define OMAP_MUX_MODE3      3
  21 #define OMAP_MUX_MODE4      4
  22 #define OMAP_MUX_MODE5      5
  23 #define OMAP_MUX_MODE6      6
  24 #define OMAP_MUX_MODE7      7
  25
  26 /* 24xx/34xx mux bit defines */
  27 #define OMAP_PULL_ENA                   (1 << 3)
  28 #define OMAP_PULL_UP                    (1 << 4)
  29 #define OMAP_ALTELECTRICALSEL           (1 << 5)
  30
  31 /* omap3/4/5 specific mux bit defines */
  32 #define OMAP_INPUT_EN                   (1 << 8)
  33 #define OMAP_OFF_EN                     (1 << 9)
  34 #define OMAP_OFFOUT_EN                  (1 << 10)
  35 #define OMAP_OFFOUT_VAL                 (1 << 11)
  36 #define OMAP_OFF_PULL_EN                (1 << 12)
  37 #define OMAP_OFF_PULL_UP                (1 << 13)
  38 #define OMAP_WAKEUP_EN                  (1 << 14)
  39 #define OMAP_WAKEUP_EVENT               (1 << 15)
  40
  41 /* Active pin states */
  42 #define OMAP_PIN_OUTPUT                 0
  43 #define OMAP_PIN_INPUT                  OMAP_INPUT_EN
  44 #define OMAP_PIN_INPUT_PULLUP           (OMAP_PULL_ENA | OMAP_INPUT_EN \
  45                                                 | OMAP_PULL_UP)
  46 #define OMAP_PIN_INPUT_PULLDOWN         (OMAP_PULL_ENA | OMAP_INPUT_EN)
  47
  48 /* Off mode states */
  49 #define OMAP_PIN_OFF_NONE               0
  50 #define OMAP_PIN_OFF_OUTPUT_HIGH        (OMAP_OFF_EN | OMAP_OFFOUT_EN \
  51                                                 | OMAP_OFFOUT_VAL)
  52 #define OMAP_PIN_OFF_OUTPUT_LOW         (OMAP_OFF_EN | OMAP_OFFOUT_EN)
  53 #define OMAP_PIN_OFF_INPUT_PULLUP       (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
  54                                                 | OMAP_OFF_PULL_UP)
  55 #define OMAP_PIN_OFF_INPUT_PULLDOWN     (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
  56 #define OMAP_PIN_OFF_WAKEUPENABLE       OMAP_WAKEUP_EN
  57
  58 #define OMAP_MODE_GPIO(partition, x)    (((x) & OMAP_MUX_MODE7) == \
  59                                           partition->gpio)
  60 #define OMAP_MODE_UART(x)       (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE0)
  61
  62 /* Flags for omapX_mux_init */
  63 #define OMAP_PACKAGE_MASK               0xffff
  64 #define OMAP_PACKAGE_CBP                6               /* 515-pin 0.40 0.50 */
  65 #define OMAP_PACKAGE_CUS                5               /* 423-pin 0.65 */
  66 #define OMAP_PACKAGE_CBB                4               /* 515-pin 0.40 0.50 */
  67 #define OMAP_PACKAGE_CBC                3               /* 515-pin 0.50 0.65 */
  68 #define OMAP_PACKAGE_ZAC                2               /* 24xx 447-pin POP */
  69 #define OMAP_PACKAGE_ZAF                1               /* 2420 447-pin SIP */
  70
  71
  72 #define OMAP_MUX_NR_MODES               8               /* Available modes */
  73 #define OMAP_MUX_NR_SIDES               2               /* Bottom & top */
  74
  75 /*
  76  * omap_mux_init flags definition:
  77  *
  78  * OMAP_GPIO_MUX_MODE, bits 0-2: gpio muxing mode, same like pad control
  79  *      register which includes values from 0-7.
  80  * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
  81  * The default value is 16 bits.
  82  */
  83 #define OMAP_MUX_GPIO_IN_MODE0          OMAP_MUX_MODE0
  84 #define OMAP_MUX_GPIO_IN_MODE1          OMAP_MUX_MODE1
  85 #define OMAP_MUX_GPIO_IN_MODE2          OMAP_MUX_MODE2
  86 #define OMAP_MUX_GPIO_IN_MODE3          OMAP_MUX_MODE3
  87 #define OMAP_MUX_GPIO_IN_MODE4          OMAP_MUX_MODE4
  88 #define OMAP_MUX_GPIO_IN_MODE5          OMAP_MUX_MODE5
  89 #define OMAP_MUX_GPIO_IN_MODE6          OMAP_MUX_MODE6
  90 #define OMAP_MUX_GPIO_IN_MODE7          OMAP_MUX_MODE7
  91 #define OMAP_MUX_REG_8BIT               (1 << 3)
  92
  93 /**
  94  * struct omap_board_data - board specific device data
  95  * @id: instance id
  96  * @flags: additional flags for platform init code
  97  * @pads: array of device specific pads
  98  * @pads_cnt: ARRAY_SIZE() of pads
  99  */
 100 struct omap_board_data {
 101         int                     id;
 102         u32                     flags;
 103         struct omap_device_pad  *pads;
 104         int                     pads_cnt;
 105 };
 106
 107 /**
 108  * struct mux_partition - contain partition related information
 109  * @name: name of the current partition
 110  * @flags: flags specific to this partition
 111  * @gpio: gpio mux mode
 112  * @phys: physical address
 113  * @size: partition size
 114  * @base: virtual address after ioremap
 115  * @muxmodes: list of nodes that belong to a partition
 116  * @node: list node for the partitions linked list
 117  */
 118 struct omap_mux_partition {
 119         const char              *name;
 120         u32                     flags;
 121         u32                     gpio;
 122         u32                     phys;
 123         u32                     size;
 124         void __iomem            *base;
 125         struct list_head        muxmodes;
 126         struct list_head        node;
 127 };
 128
 129 /**
 130  * struct omap_mux - data for omap mux register offset and it's value
 131  * @reg_offset: mux register offset from the mux base
 132  * @gpio:       GPIO number
 133  * @muxnames:   available signal modes for a ball
 134  * @balls:      available balls on the package
 135  */
 136 struct omap_mux {
 137         u16     reg_offset;
 138         u16     gpio;
 139 #ifdef CONFIG_OMAP_MUX
 140         char    *muxnames[OMAP_MUX_NR_MODES];
 141 #ifdef CONFIG_DEBUG_FS
 142         char    *balls[OMAP_MUX_NR_SIDES];
 143 #endif
 144 #endif
 145 };
 146
 147 /**
 148  * struct omap_ball - data for balls on omap package
 149  * @reg_offset: mux register offset from the mux base
 150  * @balls:      available balls on the package
 151  */
 152 struct omap_ball {
 153         u16     reg_offset;
 154         char    *balls[OMAP_MUX_NR_SIDES];
 155 };
 156
 157 /**
 158  * struct omap_board_mux - data for initializing mux registers
 159  * @reg_offset: mux register offset from the mux base
 160  * @mux_value:  desired mux value to set
 161  */
 162 struct omap_board_mux {
 163         u16     reg_offset;
 164         u16     value;
 165 };
 166
 167 #define OMAP_DEVICE_PAD_REMUX           BIT(1)  /* Dynamically remux a pad,
 168                                                    needs enable, idle and off
 169                                                    values */
 170 #define OMAP_DEVICE_PAD_WAKEUP          BIT(0)  /* Pad is wake-up capable */
 171
 172 /**
 173  * struct omap_device_pad - device specific pad configuration
 174  * @name:               signal name
 175  * @flags:              pad specific runtime flags
 176  * @enable:             runtime value for a pad
 177  * @idle:               idle value for a pad
 178  * @off:                off value for a pad, defaults to safe mode
 179  * @partition:          mux partition
 180  * @mux:                mux register
 181  */
 182 struct omap_device_pad {
 183         char                            *name;
 184         u8                              flags;
 185         u16                             enable;
 186         u16                             idle;
 187         u16                             off;
 188         struct omap_mux_partition       *partition;
 189         struct omap_mux                 *mux;
 190 };
 191
 192 struct omap_hwmod_mux_info;
 193
 194 #define OMAP_MUX_STATIC(signal, mode)                                   \
 195 {                                                                       \
 196         .name   = (signal),                                             \
 197         .enable = (mode),                                               \
 198 }
 199
 200 #if defined(CONFIG_OMAP_MUX)
 201
 202 /**
 203  * omap_mux_init_gpio - initialize a signal based on the GPIO number
 204  * @gpio:               GPIO number
 205  * @val:                Options for the mux register value
 206  */
 207 int omap_mux_init_gpio(int gpio, int val);
 208
 209 /**
 210  * omap_mux_init_signal - initialize a signal based on the signal name
 211  * @muxname:            Mux name in mode0_name.signal_name format
 212  * @val:                Options for the mux register value
 213  */
 214 int omap_mux_init_signal(const char *muxname, int val);
 215
 216 /**
 217  * omap_hwmod_mux_init - initialize hwmod specific mux data
 218  * @bpads:              Board specific device signal names
 219  * @nr_pads:            Number of signal names for the device
 220  */
 221 extern struct omap_hwmod_mux_info *
 222 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
 223
 224 /**
 225  * omap_hwmod_mux - omap hwmod specific pin muxing
 226  * @hmux:               Pads for a hwmod
 227  * @state:              Desired _HWMOD_STATE
 228  *
 229  * Called only from omap_hwmod.c, do not use.
 230  */
 231 void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state);
 232
 233 int omap_mux_get_by_name(const char *muxname,
 234                 struct omap_mux_partition **found_partition,
 235                 struct omap_mux **found_mux);
 236 #else
 237
 238 static inline int omap_mux_get_by_name(const char *muxname,
 239                 struct omap_mux_partition **found_partition,
 240                 struct omap_mux **found_mux)
 241 {
 242         return 0;
 243 }
 244
 245 static inline int omap_mux_init_gpio(int gpio, int val)
 246 {
 247         return 0;
 248 }
 249 static inline int omap_mux_init_signal(char *muxname, int val)
 250 {
 251         return 0;
 252 }
 253
 254 static inline struct omap_hwmod_mux_info *
 255 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
 256 {
 257         return NULL;
 258 }
 259
 260 static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
 261 {
 262 }
 263
 264 static struct omap_board_mux *board_mux __maybe_unused;
 265
 266 #endif
 267
 268 /**
 269  * omap_mux_get_gpio() - get mux register value based on GPIO number
 270  * @gpio:               GPIO number
 271  *
 272  */
 273 u16 omap_mux_get_gpio(int gpio);
 274
 275 /**
 276  * omap_mux_set_gpio() - set mux register value based on GPIO number
 277  * @val:                New mux register value
 278  * @gpio:               GPIO number
 279  *
 280  */
 281 void omap_mux_set_gpio(u16 val, int gpio);
 282
 283 /**
 284  * omap_mux_get() - get a mux partition by name
 285  * @name:               Name of the mux partition
 286  *
 287  */
 288 struct omap_mux_partition *omap_mux_get(const char *name);
 289
 290 /**
 291  * omap_mux_read() - read mux register
 292  * @partition:          Mux partition
 293  * @mux_offset:         Offset of the mux register
 294  *
 295  */
 296 u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
 297
 298 /**
 299  * omap_mux_write() - write mux register
 300  * @partition:          Mux partition
 301  * @val:                New mux register value
 302  * @mux_offset:         Offset of the mux register
 303  *
 304  * This should be only needed for dynamic remuxing of non-gpio signals.
 305  */
 306 void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
 307
 308 /**
 309  * omap_mux_write_array() - write an array of mux registers
 310  * @partition:          Mux partition
 311  * @board_mux:          Array of mux registers terminated by MAP_MUX_TERMINATOR
 312  *
 313  * This should be only needed for dynamic remuxing of non-gpio signals.
 314  */
 315 void omap_mux_write_array(struct omap_mux_partition *p,
 316                           struct omap_board_mux *board_mux);
 317
 318 /**
 319  * omap2420_mux_init() - initialize mux system with board specific set
 320  * @board_mux:          Board specific mux table
 321  * @flags:              OMAP package type used for the board
 322  */
 323 int omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
 324
 325 /**
 326  * omap2430_mux_init() - initialize mux system with board specific set
 327  * @board_mux:          Board specific mux table
 328  * @flags:              OMAP package type used for the board
 329  */
 330 int omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
 331
 332 /**
 333  * omap3_mux_init() - initialize mux system with board specific set
 334  * @board_mux:          Board specific mux table
 335  * @flags:              OMAP package type used for the board
 336  */
 337 int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
 338
 339 /**
 340  * omap4_mux_init() - initialize mux system with board specific set
 341  * @board_subset:       Board specific mux table
 342  * @board_wkup_subset:  Board specific mux table for wakeup instance
 343  * @flags:              OMAP package type used for the board
 344  */
 345 int omap4_mux_init(struct omap_board_mux *board_subset,
 346         struct omap_board_mux *board_wkup_subset, int flags);
 347
 348 /**
 349  * omap_mux_init - private mux init function, do not call
 350  */
 351 int omap_mux_init(const char *name, u32 flags,
 352                   u32 mux_pbase, u32 mux_size,
 353                   struct omap_mux *superset,
 354                   struct omap_mux *package_subset,
 355                   struct omap_board_mux *board_mux,
 356                   struct omap_ball *package_balls);
 357