kernel/arch/arm/mach-omap1/clock_data.c

   1 /*
   2  *  linux/arch/arm/mach-omap1/clock_data.c
   3  *
   4  *  Copyright (C) 2004 - 2005, 2009-2010 Nokia Corporation
   5  *  Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
   6  *  Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * To do:
  13  * - Clocks that are only available on some chips should be marked with the
  14  *   chips that they are present on.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/io.h>
  19 #include <linux/clk.h>
  20 #include <linux/cpufreq.h>
  21 #include <linux/delay.h>
  22
  23 #include <asm/mach-types.h>  /* for machine_is_* */
  24
  25 #include "soc.h"
  26
  27 #include <mach/hardware.h>
  28 #include <mach/usb.h>   /* for OTG_BASE */
  29
  30 #include "iomap.h"
  31 #include "clock.h"
  32 #include "sram.h"
  33
  34 /* Some ARM_IDLECT1 bit shifts - used in struct arm_idlect1_clk */
  35 #define IDL_CLKOUT_ARM_SHIFT                    12
  36 #define IDLTIM_ARM_SHIFT                        9
  37 #define IDLAPI_ARM_SHIFT                        8
  38 #define IDLIF_ARM_SHIFT                         6
  39 #define IDLLB_ARM_SHIFT                         4       /* undocumented? */
  40 #define OMAP1510_IDLLCD_ARM_SHIFT               3       /* undocumented? */
  41 #define IDLPER_ARM_SHIFT                        2
  42 #define IDLXORP_ARM_SHIFT                       1
  43 #define IDLWDT_ARM_SHIFT                        0
  44
  45 /* Some MOD_CONF_CTRL_0 bit shifts - used in struct clk.enable_bit */
  46 #define CONF_MOD_UART3_CLK_MODE_R               31
  47 #define CONF_MOD_UART2_CLK_MODE_R               30
  48 #define CONF_MOD_UART1_CLK_MODE_R               29
  49 #define CONF_MOD_MMC_SD_CLK_REQ_R               23
  50 #define CONF_MOD_MCBSP3_AUXON                   20
  51
  52 /* Some MOD_CONF_CTRL_1 bit shifts - used in struct clk.enable_bit */
  53 #define CONF_MOD_SOSSI_CLK_EN_R                 16
  54
  55 /* Some OTG_SYSCON_2-specific bit fields */
  56 #define OTG_SYSCON_2_UHOST_EN_SHIFT             8
  57
  58 /* Some SOFT_REQ_REG bit fields - used in struct clk.enable_bit */
  59 #define SOFT_MMC2_DPLL_REQ_SHIFT        13
  60 #define SOFT_MMC_DPLL_REQ_SHIFT         12
  61 #define SOFT_UART3_DPLL_REQ_SHIFT       11
  62 #define SOFT_UART2_DPLL_REQ_SHIFT       10
  63 #define SOFT_UART1_DPLL_REQ_SHIFT       9
  64 #define SOFT_USB_OTG_DPLL_REQ_SHIFT     8
  65 #define SOFT_CAM_DPLL_REQ_SHIFT         7
  66 #define SOFT_COM_MCKO_REQ_SHIFT         6
  67 #define SOFT_PERIPH_REQ_SHIFT           5       /* sys_ck gate for UART2 ? */
  68 #define USB_REQ_EN_SHIFT                4
  69 #define SOFT_USB_REQ_SHIFT              3       /* sys_ck gate for USB host? */
  70 #define SOFT_SDW_REQ_SHIFT              2       /* sys_ck gate for Bluetooth? */
  71 #define SOFT_COM_REQ_SHIFT              1       /* sys_ck gate for com proc? */
  72 #define SOFT_DPLL_REQ_SHIFT             0
  73
  74 /*
  75  * Omap1 clocks
  76  */
  77
  78 static struct clk ck_ref = {
  79         .name           = "ck_ref",
  80         .ops            = &clkops_null,
  81         .rate           = 12000000,
  82 };
  83
  84 static struct clk ck_dpll1 = {
  85         .name           = "ck_dpll1",
  86         .ops            = &clkops_null,
  87         .parent         = &ck_ref,
  88 };
  89
  90 /*
  91  * FIXME: This clock seems to be necessary but no-one has asked for its
  92  * activation.  [ FIX: SoSSI, SSR ]
  93  */
  94 static struct arm_idlect1_clk ck_dpll1out = {
  95         .clk = {
  96                 .name           = "ck_dpll1out",
  97                 .ops            = &clkops_generic,
  98                 .parent         = &ck_dpll1,
  99                 .flags          = CLOCK_IDLE_CONTROL | ENABLE_REG_32BIT |
 100                                   ENABLE_ON_INIT,
 101                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 102                 .enable_bit     = EN_CKOUT_ARM,
 103                 .recalc         = &followparent_recalc,
 104         },
 105         .idlect_shift   = IDL_CLKOUT_ARM_SHIFT,
 106 };
 107
 108 static struct clk sossi_ck = {
 109         .name           = "ck_sossi",
 110         .ops            = &clkops_generic,
 111         .parent         = &ck_dpll1out.clk,
 112         .flags          = CLOCK_NO_IDLE_PARENT | ENABLE_REG_32BIT,
 113         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_1),
 114         .enable_bit     = CONF_MOD_SOSSI_CLK_EN_R,
 115         .recalc         = &omap1_sossi_recalc,
 116         .set_rate       = &omap1_set_sossi_rate,
 117 };
 118
 119 static struct clk arm_ck = {
 120         .name           = "arm_ck",
 121         .ops            = &clkops_null,
 122         .parent         = &ck_dpll1,
 123         .rate_offset    = CKCTL_ARMDIV_OFFSET,
 124         .recalc         = &omap1_ckctl_recalc,
 125         .round_rate     = omap1_clk_round_rate_ckctl_arm,
 126         .set_rate       = omap1_clk_set_rate_ckctl_arm,
 127 };
 128
 129 static struct arm_idlect1_clk armper_ck = {
 130         .clk = {
 131                 .name           = "armper_ck",
 132                 .ops            = &clkops_generic,
 133                 .parent         = &ck_dpll1,
 134                 .flags          = CLOCK_IDLE_CONTROL,
 135                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 136                 .enable_bit     = EN_PERCK,
 137                 .rate_offset    = CKCTL_PERDIV_OFFSET,
 138                 .recalc         = &omap1_ckctl_recalc,
 139                 .round_rate     = omap1_clk_round_rate_ckctl_arm,
 140                 .set_rate       = omap1_clk_set_rate_ckctl_arm,
 141         },
 142         .idlect_shift   = IDLPER_ARM_SHIFT,
 143 };
 144
 145 /*
 146  * FIXME: This clock seems to be necessary but no-one has asked for its
 147  * activation.  [ GPIO code for 1510 ]
 148  */
 149 static struct clk arm_gpio_ck = {
 150         .name           = "ick",
 151         .ops            = &clkops_generic,
 152         .parent         = &ck_dpll1,
 153         .flags          = ENABLE_ON_INIT,
 154         .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 155         .enable_bit     = EN_GPIOCK,
 156         .recalc         = &followparent_recalc,
 157 };
 158
 159 static struct arm_idlect1_clk armxor_ck = {
 160         .clk = {
 161                 .name           = "armxor_ck",
 162                 .ops            = &clkops_generic,
 163                 .parent         = &ck_ref,
 164                 .flags          = CLOCK_IDLE_CONTROL,
 165                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 166                 .enable_bit     = EN_XORPCK,
 167                 .recalc         = &followparent_recalc,
 168         },
 169         .idlect_shift   = IDLXORP_ARM_SHIFT,
 170 };
 171
 172 static struct arm_idlect1_clk armtim_ck = {
 173         .clk = {
 174                 .name           = "armtim_ck",
 175                 .ops            = &clkops_generic,
 176                 .parent         = &ck_ref,
 177                 .flags          = CLOCK_IDLE_CONTROL,
 178                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 179                 .enable_bit     = EN_TIMCK,
 180                 .recalc         = &followparent_recalc,
 181         },
 182         .idlect_shift   = IDLTIM_ARM_SHIFT,
 183 };
 184
 185 static struct arm_idlect1_clk armwdt_ck = {
 186         .clk = {
 187                 .name           = "armwdt_ck",
 188                 .ops            = &clkops_generic,
 189                 .parent         = &ck_ref,
 190                 .flags          = CLOCK_IDLE_CONTROL,
 191                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 192                 .enable_bit     = EN_WDTCK,
 193                 .fixed_div      = 14,
 194                 .recalc         = &omap_fixed_divisor_recalc,
 195         },
 196         .idlect_shift   = IDLWDT_ARM_SHIFT,
 197 };
 198
 199 static struct clk arminth_ck16xx = {
 200         .name           = "arminth_ck",
 201         .ops            = &clkops_null,
 202         .parent         = &arm_ck,
 203         .recalc         = &followparent_recalc,
 204         /* Note: On 16xx the frequency can be divided by 2 by programming
 205          * ARM_CKCTL:ARM_INTHCK_SEL(14) to 1
 206          *
 207          * 1510 version is in TC clocks.
 208          */
 209 };
 210
 211 static struct clk dsp_ck = {
 212         .name           = "dsp_ck",
 213         .ops            = &clkops_generic,
 214         .parent         = &ck_dpll1,
 215         .enable_reg     = OMAP1_IO_ADDRESS(ARM_CKCTL),
 216         .enable_bit     = EN_DSPCK,
 217         .rate_offset    = CKCTL_DSPDIV_OFFSET,
 218         .recalc         = &omap1_ckctl_recalc,
 219         .round_rate     = omap1_clk_round_rate_ckctl_arm,
 220         .set_rate       = omap1_clk_set_rate_ckctl_arm,
 221 };
 222
 223 static struct clk dspmmu_ck = {
 224         .name           = "dspmmu_ck",
 225         .ops            = &clkops_null,
 226         .parent         = &ck_dpll1,
 227         .rate_offset    = CKCTL_DSPMMUDIV_OFFSET,
 228         .recalc         = &omap1_ckctl_recalc,
 229         .round_rate     = omap1_clk_round_rate_ckctl_arm,
 230         .set_rate       = omap1_clk_set_rate_ckctl_arm,
 231 };
 232
 233 static struct clk dspper_ck = {
 234         .name           = "dspper_ck",
 235         .ops            = &clkops_dspck,
 236         .parent         = &ck_dpll1,
 237         .enable_reg     = DSP_IDLECT2,
 238         .enable_bit     = EN_PERCK,
 239         .rate_offset    = CKCTL_PERDIV_OFFSET,
 240         .recalc         = &omap1_ckctl_recalc_dsp_domain,
 241         .round_rate     = omap1_clk_round_rate_ckctl_arm,
 242         .set_rate       = &omap1_clk_set_rate_dsp_domain,
 243 };
 244
 245 static struct clk dspxor_ck = {
 246         .name           = "dspxor_ck",
 247         .ops            = &clkops_dspck,
 248         .parent         = &ck_ref,
 249         .enable_reg     = DSP_IDLECT2,
 250         .enable_bit     = EN_XORPCK,
 251         .recalc         = &followparent_recalc,
 252 };
 253
 254 static struct clk dsptim_ck = {
 255         .name           = "dsptim_ck",
 256         .ops            = &clkops_dspck,
 257         .parent         = &ck_ref,
 258         .enable_reg     = DSP_IDLECT2,
 259         .enable_bit     = EN_DSPTIMCK,
 260         .recalc         = &followparent_recalc,
 261 };
 262
 263 static struct arm_idlect1_clk tc_ck = {
 264         .clk = {
 265                 .name           = "tc_ck",
 266                 .ops            = &clkops_null,
 267                 .parent         = &ck_dpll1,
 268                 .flags          = CLOCK_IDLE_CONTROL,
 269                 .rate_offset    = CKCTL_TCDIV_OFFSET,
 270                 .recalc         = &omap1_ckctl_recalc,
 271                 .round_rate     = omap1_clk_round_rate_ckctl_arm,
 272                 .set_rate       = omap1_clk_set_rate_ckctl_arm,
 273         },
 274         .idlect_shift   = IDLIF_ARM_SHIFT,
 275 };
 276
 277 static struct clk arminth_ck1510 = {
 278         .name           = "arminth_ck",
 279         .ops            = &clkops_null,
 280         .parent         = &tc_ck.clk,
 281         .recalc         = &followparent_recalc,
 282         /* Note: On 1510 the frequency follows TC_CK
 283          *
 284          * 16xx version is in MPU clocks.
 285          */
 286 };
 287
 288 static struct clk tipb_ck = {
 289         /* No-idle controlled by "tc_ck" */
 290         .name           = "tipb_ck",
 291         .ops            = &clkops_null,
 292         .parent         = &tc_ck.clk,
 293         .recalc         = &followparent_recalc,
 294 };
 295
 296 static struct clk l3_ocpi_ck = {
 297         /* No-idle controlled by "tc_ck" */
 298         .name           = "l3_ocpi_ck",
 299         .ops            = &clkops_generic,
 300         .parent         = &tc_ck.clk,
 301         .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT3),
 302         .enable_bit     = EN_OCPI_CK,
 303         .recalc         = &followparent_recalc,
 304 };
 305
 306 static struct clk tc1_ck = {
 307         .name           = "tc1_ck",
 308         .ops            = &clkops_generic,
 309         .parent         = &tc_ck.clk,
 310         .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT3),
 311         .enable_bit     = EN_TC1_CK,
 312         .recalc         = &followparent_recalc,
 313 };
 314
 315 /*
 316  * FIXME: This clock seems to be necessary but no-one has asked for its
 317  * activation.  [ pm.c (SRAM), CCP, Camera ]
 318  */
 319 static struct clk tc2_ck = {
 320         .name           = "tc2_ck",
 321         .ops            = &clkops_generic,
 322         .parent         = &tc_ck.clk,
 323         .flags          = ENABLE_ON_INIT,
 324         .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT3),
 325         .enable_bit     = EN_TC2_CK,
 326         .recalc         = &followparent_recalc,
 327 };
 328
 329 static struct clk dma_ck = {
 330         /* No-idle controlled by "tc_ck" */
 331         .name           = "dma_ck",
 332         .ops            = &clkops_null,
 333         .parent         = &tc_ck.clk,
 334         .recalc         = &followparent_recalc,
 335 };
 336
 337 static struct clk dma_lcdfree_ck = {
 338         .name           = "dma_lcdfree_ck",
 339         .ops            = &clkops_null,
 340         .parent         = &tc_ck.clk,
 341         .recalc         = &followparent_recalc,
 342 };
 343
 344 static struct arm_idlect1_clk api_ck = {
 345         .clk = {
 346                 .name           = "api_ck",
 347                 .ops            = &clkops_generic,
 348                 .parent         = &tc_ck.clk,
 349                 .flags          = CLOCK_IDLE_CONTROL,
 350                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 351                 .enable_bit     = EN_APICK,
 352                 .recalc         = &followparent_recalc,
 353         },
 354         .idlect_shift   = IDLAPI_ARM_SHIFT,
 355 };
 356
 357 static struct arm_idlect1_clk lb_ck = {
 358         .clk = {
 359                 .name           = "lb_ck",
 360                 .ops            = &clkops_generic,
 361                 .parent         = &tc_ck.clk,
 362                 .flags          = CLOCK_IDLE_CONTROL,
 363                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 364                 .enable_bit     = EN_LBCK,
 365                 .recalc         = &followparent_recalc,
 366         },
 367         .idlect_shift   = IDLLB_ARM_SHIFT,
 368 };
 369
 370 static struct clk rhea1_ck = {
 371         .name           = "rhea1_ck",
 372         .ops            = &clkops_null,
 373         .parent         = &tc_ck.clk,
 374         .recalc         = &followparent_recalc,
 375 };
 376
 377 static struct clk rhea2_ck = {
 378         .name           = "rhea2_ck",
 379         .ops            = &clkops_null,
 380         .parent         = &tc_ck.clk,
 381         .recalc         = &followparent_recalc,
 382 };
 383
 384 static struct clk lcd_ck_16xx = {
 385         .name           = "lcd_ck",
 386         .ops            = &clkops_generic,
 387         .parent         = &ck_dpll1,
 388         .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 389         .enable_bit     = EN_LCDCK,
 390         .rate_offset    = CKCTL_LCDDIV_OFFSET,
 391         .recalc         = &omap1_ckctl_recalc,
 392         .round_rate     = omap1_clk_round_rate_ckctl_arm,
 393         .set_rate       = omap1_clk_set_rate_ckctl_arm,
 394 };
 395
 396 static struct arm_idlect1_clk lcd_ck_1510 = {
 397         .clk = {
 398                 .name           = "lcd_ck",
 399                 .ops            = &clkops_generic,
 400                 .parent         = &ck_dpll1,
 401                 .flags          = CLOCK_IDLE_CONTROL,
 402                 .enable_reg     = OMAP1_IO_ADDRESS(ARM_IDLECT2),
 403                 .enable_bit     = EN_LCDCK,
 404                 .rate_offset    = CKCTL_LCDDIV_OFFSET,
 405                 .recalc         = &omap1_ckctl_recalc,
 406                 .round_rate     = omap1_clk_round_rate_ckctl_arm,
 407                 .set_rate       = omap1_clk_set_rate_ckctl_arm,
 408         },
 409         .idlect_shift   = OMAP1510_IDLLCD_ARM_SHIFT,
 410 };
 411
 412 /*
 413  * XXX The enable_bit here is misused - it simply switches between 12MHz
 414  * and 48MHz.  Reimplement with clksel.
 415  *
 416  * XXX does this need SYSC register handling?
 417  */
 418 static struct clk uart1_1510 = {
 419         .name           = "uart1_ck",
 420         .ops            = &clkops_null,
 421         /* Direct from ULPD, no real parent */
 422         .parent         = &armper_ck.clk,
 423         .rate           = 12000000,
 424         .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 425         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 426         .enable_bit     = CONF_MOD_UART1_CLK_MODE_R,
 427         .set_rate       = &omap1_set_uart_rate,
 428         .recalc         = &omap1_uart_recalc,
 429 };
 430
 431 /*
 432  * XXX The enable_bit here is misused - it simply switches between 12MHz
 433  * and 48MHz.  Reimplement with clksel.
 434  *
 435  * XXX SYSC register handling does not belong in the clock framework
 436  */
 437 static struct uart_clk uart1_16xx = {
 438         .clk    = {
 439                 .name           = "uart1_ck",
 440                 .ops            = &clkops_uart_16xx,
 441                 /* Direct from ULPD, no real parent */
 442                 .parent         = &armper_ck.clk,
 443                 .rate           = 48000000,
 444                 .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 445                 .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 446                 .enable_bit     = CONF_MOD_UART1_CLK_MODE_R,
 447         },
 448         .sysc_addr      = 0xfffb0054,
 449 };
 450
 451 /*
 452  * XXX The enable_bit here is misused - it simply switches between 12MHz
 453  * and 48MHz.  Reimplement with clksel.
 454  *
 455  * XXX does this need SYSC register handling?
 456  */
 457 static struct clk uart2_ck = {
 458         .name           = "uart2_ck",
 459         .ops            = &clkops_null,
 460         /* Direct from ULPD, no real parent */
 461         .parent         = &armper_ck.clk,
 462         .rate           = 12000000,
 463         .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 464         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 465         .enable_bit     = CONF_MOD_UART2_CLK_MODE_R,
 466         .set_rate       = &omap1_set_uart_rate,
 467         .recalc         = &omap1_uart_recalc,
 468 };
 469
 470 /*
 471  * XXX The enable_bit here is misused - it simply switches between 12MHz
 472  * and 48MHz.  Reimplement with clksel.
 473  *
 474  * XXX does this need SYSC register handling?
 475  */
 476 static struct clk uart3_1510 = {
 477         .name           = "uart3_ck",
 478         .ops            = &clkops_null,
 479         /* Direct from ULPD, no real parent */
 480         .parent         = &armper_ck.clk,
 481         .rate           = 12000000,
 482         .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 483         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 484         .enable_bit     = CONF_MOD_UART3_CLK_MODE_R,
 485         .set_rate       = &omap1_set_uart_rate,
 486         .recalc         = &omap1_uart_recalc,
 487 };
 488
 489 /*
 490  * XXX The enable_bit here is misused - it simply switches between 12MHz
 491  * and 48MHz.  Reimplement with clksel.
 492  *
 493  * XXX SYSC register handling does not belong in the clock framework
 494  */
 495 static struct uart_clk uart3_16xx = {
 496         .clk    = {
 497                 .name           = "uart3_ck",
 498                 .ops            = &clkops_uart_16xx,
 499                 /* Direct from ULPD, no real parent */
 500                 .parent         = &armper_ck.clk,
 501                 .rate           = 48000000,
 502                 .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 503                 .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 504                 .enable_bit     = CONF_MOD_UART3_CLK_MODE_R,
 505         },
 506         .sysc_addr      = 0xfffb9854,
 507 };
 508
 509 static struct clk usb_clko = {  /* 6 MHz output on W4_USB_CLKO */
 510         .name           = "usb_clko",
 511         .ops            = &clkops_generic,
 512         /* Direct from ULPD, no parent */
 513         .rate           = 6000000,
 514         .flags          = ENABLE_REG_32BIT,
 515         .enable_reg     = OMAP1_IO_ADDRESS(ULPD_CLOCK_CTRL),
 516         .enable_bit     = USB_MCLK_EN_BIT,
 517 };
 518
 519 static struct clk usb_hhc_ck1510 = {
 520         .name           = "usb_hhc_ck",
 521         .ops            = &clkops_generic,
 522         /* Direct from ULPD, no parent */
 523         .rate           = 48000000, /* Actually 2 clocks, 12MHz and 48MHz */
 524         .flags          = ENABLE_REG_32BIT,
 525         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 526         .enable_bit     = USB_HOST_HHC_UHOST_EN,
 527 };
 528
 529 static struct clk usb_hhc_ck16xx = {
 530         .name           = "usb_hhc_ck",
 531         .ops            = &clkops_generic,
 532         /* Direct from ULPD, no parent */
 533         .rate           = 48000000,
 534         /* OTG_SYSCON_2.OTG_PADEN == 0 (not 1510-compatible) */
 535         .flags          = ENABLE_REG_32BIT,
 536         .enable_reg     = OMAP1_IO_ADDRESS(OTG_BASE + 0x08), /* OTG_SYSCON_2 */
 537         .enable_bit     = OTG_SYSCON_2_UHOST_EN_SHIFT
 538 };
 539
 540 static struct clk usb_dc_ck = {
 541         .name           = "usb_dc_ck",
 542         .ops            = &clkops_generic,
 543         /* Direct from ULPD, no parent */
 544         .rate           = 48000000,
 545         .enable_reg     = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
 546         .enable_bit     = SOFT_USB_OTG_DPLL_REQ_SHIFT,
 547 };
 548
 549 static struct clk uart1_7xx = {
 550         .name           = "uart1_ck",
 551         .ops            = &clkops_generic,
 552         /* Direct from ULPD, no parent */
 553         .rate           = 12000000,
 554         .enable_reg     = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
 555         .enable_bit     = 9,
 556 };
 557
 558 static struct clk uart2_7xx = {
 559         .name           = "uart2_ck",
 560         .ops            = &clkops_generic,
 561         /* Direct from ULPD, no parent */
 562         .rate           = 12000000,
 563         .enable_reg     = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
 564         .enable_bit     = 11,
 565 };
 566
 567 static struct clk mclk_1510 = {
 568         .name           = "mclk",
 569         .ops            = &clkops_generic,
 570         /* Direct from ULPD, no parent. May be enabled by ext hardware. */
 571         .rate           = 12000000,
 572         .enable_reg     = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
 573         .enable_bit     = SOFT_COM_MCKO_REQ_SHIFT,
 574 };
 575
 576 static struct clk mclk_16xx = {
 577         .name           = "mclk",
 578         .ops            = &clkops_generic,
 579         /* Direct from ULPD, no parent. May be enabled by ext hardware. */
 580         .enable_reg     = OMAP1_IO_ADDRESS(COM_CLK_DIV_CTRL_SEL),
 581         .enable_bit     = COM_ULPD_PLL_CLK_REQ,
 582         .set_rate       = &omap1_set_ext_clk_rate,
 583         .round_rate     = &omap1_round_ext_clk_rate,
 584         .init           = &omap1_init_ext_clk,
 585 };
 586
 587 static struct clk bclk_1510 = {
 588         .name           = "bclk",
 589         .ops            = &clkops_generic,
 590         /* Direct from ULPD, no parent. May be enabled by ext hardware. */
 591         .rate           = 12000000,
 592 };
 593
 594 static struct clk bclk_16xx = {
 595         .name           = "bclk",
 596         .ops            = &clkops_generic,
 597         /* Direct from ULPD, no parent. May be enabled by ext hardware. */
 598         .enable_reg     = OMAP1_IO_ADDRESS(SWD_CLK_DIV_CTRL_SEL),
 599         .enable_bit     = SWD_ULPD_PLL_CLK_REQ,
 600         .set_rate       = &omap1_set_ext_clk_rate,
 601         .round_rate     = &omap1_round_ext_clk_rate,
 602         .init           = &omap1_init_ext_clk,
 603 };
 604
 605 static struct clk mmc1_ck = {
 606         .name           = "mmc1_ck",
 607         .ops            = &clkops_generic,
 608         /* Functional clock is direct from ULPD, interface clock is ARMPER */
 609         .parent         = &armper_ck.clk,
 610         .rate           = 48000000,
 611         .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 612         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 613         .enable_bit     = CONF_MOD_MMC_SD_CLK_REQ_R,
 614 };
 615
 616 /*
 617  * XXX MOD_CONF_CTRL_0 bit 20 is defined in the 1510 TRM as
 618  * CONF_MOD_MCBSP3_AUXON ??
 619  */
 620 static struct clk mmc2_ck = {
 621         .name           = "mmc2_ck",
 622         .ops            = &clkops_generic,
 623         /* Functional clock is direct from ULPD, interface clock is ARMPER */
 624         .parent         = &armper_ck.clk,
 625         .rate           = 48000000,
 626         .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 627         .enable_reg     = OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0),
 628         .enable_bit     = 20,
 629 };
 630
 631 static struct clk mmc3_ck = {
 632         .name           = "mmc3_ck",
 633         .ops            = &clkops_generic,
 634         /* Functional clock is direct from ULPD, interface clock is ARMPER */
 635         .parent         = &armper_ck.clk,
 636         .rate           = 48000000,
 637         .flags          = ENABLE_REG_32BIT | CLOCK_NO_IDLE_PARENT,
 638         .enable_reg     = OMAP1_IO_ADDRESS(SOFT_REQ_REG),
 639         .enable_bit     = SOFT_MMC_DPLL_REQ_SHIFT,
 640 };
 641
 642 static struct clk virtual_ck_mpu = {
 643         .name           = "mpu",
 644         .ops            = &clkops_null,
 645         .parent         = &arm_ck, /* Is smarter alias for */
 646         .recalc         = &followparent_recalc,
 647         .set_rate       = &omap1_select_table_rate,
 648         .round_rate     = &omap1_round_to_table_rate,
 649 };
 650
 651 /* virtual functional clock domain for I2C. Just for making sure that ARMXOR_CK
 652 remains active during MPU idle whenever this is enabled */
 653 static struct clk i2c_fck = {
 654         .name           = "i2c_fck",
 655         .ops            = &clkops_null,
 656         .flags          = CLOCK_NO_IDLE_PARENT,
 657         .parent         = &armxor_ck.clk,
 658         .recalc         = &followparent_recalc,
 659 };
 660
 661 static struct clk i2c_ick = {
 662         .name           = "i2c_ick",
 663         .ops            = &clkops_null,
 664         .flags          = CLOCK_NO_IDLE_PARENT,
 665         .parent         = &armper_ck.clk,
 666         .recalc         = &followparent_recalc,
 667 };
 668
 669 /*
 670  * clkdev integration
 671  */
 672
 673 static struct omap_clk omap_clks[] = {
 674         /* non-ULPD clocks */
 675         CLK(NULL,       "ck_ref",       &ck_ref,        CK_16XX | CK_1510 | CK_310 | CK_7XX),
 676         CLK(NULL,       "ck_dpll1",     &ck_dpll1,      CK_16XX | CK_1510 | CK_310 | CK_7XX),
 677         /* CK_GEN1 clocks */
 678         CLK(NULL,       "ck_dpll1out",  &ck_dpll1out.clk, CK_16XX),
 679         CLK(NULL,       "ck_sossi",     &sossi_ck,      CK_16XX),
 680         CLK(NULL,       "arm_ck",       &arm_ck,        CK_16XX | CK_1510 | CK_310),
 681         CLK(NULL,       "armper_ck",    &armper_ck.clk, CK_16XX | CK_1510 | CK_310),
 682         CLK("omap_gpio.0", "ick",       &arm_gpio_ck,   CK_1510 | CK_310),
 683         CLK(NULL,       "armxor_ck",    &armxor_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
 684         CLK(NULL,       "armtim_ck",    &armtim_ck.clk, CK_16XX | CK_1510 | CK_310),
 685         CLK("omap_wdt", "fck",          &armwdt_ck.clk, CK_16XX | CK_1510 | CK_310),
 686         CLK("omap_wdt", "ick",          &armper_ck.clk, CK_16XX),
 687         CLK("omap_wdt", "ick",          &dummy_ck,      CK_1510 | CK_310),
 688         CLK(NULL,       "arminth_ck",   &arminth_ck1510, CK_1510 | CK_310),
 689         CLK(NULL,       "arminth_ck",   &arminth_ck16xx, CK_16XX),
 690         /* CK_GEN2 clocks */
 691         CLK(NULL,       "dsp_ck",       &dsp_ck,        CK_16XX | CK_1510 | CK_310),
 692         CLK(NULL,       "dspmmu_ck",    &dspmmu_ck,     CK_16XX | CK_1510 | CK_310),
 693         CLK(NULL,       "dspper_ck",    &dspper_ck,     CK_16XX | CK_1510 | CK_310),
 694         CLK(NULL,       "dspxor_ck",    &dspxor_ck,     CK_16XX | CK_1510 | CK_310),
 695         CLK(NULL,       "dsptim_ck",    &dsptim_ck,     CK_16XX | CK_1510 | CK_310),
 696         /* CK_GEN3 clocks */
 697         CLK(NULL,       "tc_ck",        &tc_ck.clk,     CK_16XX | CK_1510 | CK_310 | CK_7XX),
 698         CLK(NULL,       "tipb_ck",      &tipb_ck,       CK_1510 | CK_310),
 699         CLK(NULL,       "l3_ocpi_ck",   &l3_ocpi_ck,    CK_16XX | CK_7XX),
 700         CLK(NULL,       "tc1_ck",       &tc1_ck,        CK_16XX),
 701         CLK(NULL,       "tc2_ck",       &tc2_ck,        CK_16XX),
 702         CLK(NULL,       "dma_ck",       &dma_ck,        CK_16XX | CK_1510 | CK_310),
 703         CLK(NULL,       "dma_lcdfree_ck", &dma_lcdfree_ck, CK_16XX),
 704         CLK(NULL,       "api_ck",       &api_ck.clk,    CK_16XX | CK_1510 | CK_310 | CK_7XX),
 705         CLK(NULL,       "lb_ck",        &lb_ck.clk,     CK_1510 | CK_310),
 706         CLK(NULL,       "rhea1_ck",     &rhea1_ck,      CK_16XX),
 707         CLK(NULL,       "rhea2_ck",     &rhea2_ck,      CK_16XX),
 708         CLK(NULL,       "lcd_ck",       &lcd_ck_16xx,   CK_16XX | CK_7XX),
 709         CLK(NULL,       "lcd_ck",       &lcd_ck_1510.clk, CK_1510 | CK_310),
 710         /* ULPD clocks */
 711         CLK(NULL,       "uart1_ck",     &uart1_1510,    CK_1510 | CK_310),
 712         CLK(NULL,       "uart1_ck",     &uart1_16xx.clk, CK_16XX),
 713         CLK(NULL,       "uart1_ck",     &uart1_7xx,     CK_7XX),
 714         CLK(NULL,       "uart2_ck",     &uart2_ck,      CK_16XX | CK_1510 | CK_310),
 715         CLK(NULL,       "uart2_ck",     &uart2_7xx,     CK_7XX),
 716         CLK(NULL,       "uart3_ck",     &uart3_1510,    CK_1510 | CK_310),
 717         CLK(NULL,       "uart3_ck",     &uart3_16xx.clk, CK_16XX),
 718         CLK(NULL,       "usb_clko",     &usb_clko,      CK_16XX | CK_1510 | CK_310),
 719         CLK(NULL,       "usb_hhc_ck",   &usb_hhc_ck1510, CK_1510 | CK_310),
 720         CLK(NULL,       "usb_hhc_ck",   &usb_hhc_ck16xx, CK_16XX),
 721         CLK(NULL,       "usb_dc_ck",    &usb_dc_ck,     CK_16XX | CK_7XX),
 722         CLK(NULL,       "mclk",         &mclk_1510,     CK_1510 | CK_310),
 723         CLK(NULL,       "mclk",         &mclk_16xx,     CK_16XX),
 724         CLK(NULL,       "bclk",         &bclk_1510,     CK_1510 | CK_310),
 725         CLK(NULL,       "bclk",         &bclk_16xx,     CK_16XX),
 726         CLK("mmci-omap.0", "fck",       &mmc1_ck,       CK_16XX | CK_1510 | CK_310),
 727         CLK("mmci-omap.0", "fck",       &mmc3_ck,       CK_7XX),
 728         CLK("mmci-omap.0", "ick",       &armper_ck.clk, CK_16XX | CK_1510 | CK_310 | CK_7XX),
 729         CLK("mmci-omap.1", "fck",       &mmc2_ck,       CK_16XX),
 730         CLK("mmci-omap.1", "ick",       &armper_ck.clk, CK_16XX),
 731         /* Virtual clocks */
 732         CLK(NULL,       "mpu",          &virtual_ck_mpu, CK_16XX | CK_1510 | CK_310),
 733         CLK("omap_i2c.1", "fck",        &i2c_fck,       CK_16XX | CK_1510 | CK_310 | CK_7XX),
 734         CLK("omap_i2c.1", "ick",        &i2c_ick,       CK_16XX),
 735         CLK("omap_i2c.1", "ick",        &dummy_ck,      CK_1510 | CK_310 | CK_7XX),
 736         CLK("omap1_spi100k.1", "fck",   &dummy_ck,      CK_7XX),
 737         CLK("omap1_spi100k.1", "ick",   &dummy_ck,      CK_7XX),
 738         CLK("omap1_spi100k.2", "fck",   &dummy_ck,      CK_7XX),
 739         CLK("omap1_spi100k.2", "ick",   &dummy_ck,      CK_7XX),
 740         CLK("omap_uwire", "fck",        &armxor_ck.clk, CK_16XX | CK_1510 | CK_310),
 741         CLK("omap-mcbsp.1", "ick",      &dspper_ck,     CK_16XX),
 742         CLK("omap-mcbsp.1", "ick",      &dummy_ck,      CK_1510 | CK_310),
 743         CLK("omap-mcbsp.2", "ick",      &armper_ck.clk, CK_16XX),
 744         CLK("omap-mcbsp.2", "ick",      &dummy_ck,      CK_1510 | CK_310),
 745         CLK("omap-mcbsp.3", "ick",      &dspper_ck,     CK_16XX),
 746         CLK("omap-mcbsp.3", "ick",      &dummy_ck,      CK_1510 | CK_310),
 747         CLK("omap-mcbsp.1", "fck",      &dspxor_ck,     CK_16XX | CK_1510 | CK_310),
 748         CLK("omap-mcbsp.2", "fck",      &armper_ck.clk, CK_16XX | CK_1510 | CK_310),
 749         CLK("omap-mcbsp.3", "fck",      &dspxor_ck,     CK_16XX | CK_1510 | CK_310),
 750 };
 751
 752 /*
 753  * init
 754  */
 755
 756 static void __init omap1_show_rates(void)
 757 {
 758         pr_notice("Clocking rate (xtal/DPLL1/MPU): %ld.%01ld/%ld.%01ld/%ld.%01ld MHz\n",
 759                   ck_ref.rate / 1000000, (ck_ref.rate / 100000) % 10,
 760                   ck_dpll1.rate / 1000000, (ck_dpll1.rate / 100000) % 10,
 761                   arm_ck.rate / 1000000, (arm_ck.rate / 100000) % 10);
 762 }
 763
 764 u32 cpu_mask;
 765
 766 int __init omap1_clk_init(void)
 767 {
 768         struct omap_clk *c;
 769         int crystal_type = 0; /* Default 12 MHz */
 770         u32 reg;
 771
 772 #ifdef CONFIG_DEBUG_LL
 773         /*
 774          * Resets some clocks that may be left on from bootloader,
 775          * but leaves serial clocks on.
 776          */
 777         omap_writel(0x3 << 29, MOD_CONF_CTRL_0);
 778 #endif
 779
 780         /* USB_REQ_EN will be disabled later if necessary (usb_dc_ck) */
 781         reg = omap_readw(SOFT_REQ_REG) & (1 << 4);
 782         omap_writew(reg, SOFT_REQ_REG);
 783         if (!cpu_is_omap15xx())
 784                 omap_writew(0, SOFT_REQ_REG2);
 785
 786         /* By default all idlect1 clocks are allowed to idle */
 787         arm_idlect1_mask = ~0;
 788
 789         for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++)
 790                 clk_preinit(c->lk.clk);
 791
 792         cpu_mask = 0;
 793         if (cpu_is_omap1710())
 794                 cpu_mask |= CK_1710;
 795         if (cpu_is_omap16xx())
 796                 cpu_mask |= CK_16XX;
 797         if (cpu_is_omap1510())
 798                 cpu_mask |= CK_1510;
 799         if (cpu_is_omap7xx())
 800                 cpu_mask |= CK_7XX;
 801         if (cpu_is_omap310())
 802                 cpu_mask |= CK_310;
 803
 804         for (c = omap_clks; c < omap_clks + ARRAY_SIZE(omap_clks); c++)
 805                 if (c->cpu & cpu_mask) {
 806                         clkdev_add(&c->lk);
 807                         clk_register(c->lk.clk);
 808                 }
 809
 810         /* Pointers to these clocks are needed by code in clock.c */
 811         api_ck_p = clk_get(NULL, "api_ck");
 812         ck_dpll1_p = clk_get(NULL, "ck_dpll1");
 813         ck_ref_p = clk_get(NULL, "ck_ref");
 814
 815         if (cpu_is_omap7xx())
 816                 ck_ref.rate = 13000000;
 817         if (cpu_is_omap16xx() && crystal_type == 2)
 818                 ck_ref.rate = 19200000;
 819
 820         pr_info("Clocks: ARM_SYSST: 0x%04x DPLL_CTL: 0x%04x ARM_CKCTL: 0x%04x\n",
 821                 omap_readw(ARM_SYSST), omap_readw(DPLL_CTL),
 822                 omap_readw(ARM_CKCTL));
 823
 824         /* We want to be in syncronous scalable mode */
 825         omap_writew(0x1000, ARM_SYSST);
 826
 827
 828         /*
 829          * Initially use the values set by bootloader. Determine PLL rate and
 830          * recalculate dependent clocks as if kernel had changed PLL or
 831          * divisors. See also omap1_clk_late_init() that can reprogram dpll1
 832          * after the SRAM is initialized.
 833          */
 834         {
 835                 unsigned pll_ctl_val = omap_readw(DPLL_CTL);
 836
 837                 ck_dpll1.rate = ck_ref.rate; /* Base xtal rate */
 838                 if (pll_ctl_val & 0x10) {
 839                         /* PLL enabled, apply multiplier and divisor */
 840                         if (pll_ctl_val & 0xf80)
 841                                 ck_dpll1.rate *= (pll_ctl_val & 0xf80) >> 7;
 842                         ck_dpll1.rate /= ((pll_ctl_val & 0x60) >> 5) + 1;
 843                 } else {
 844                         /* PLL disabled, apply bypass divisor */
 845                         switch (pll_ctl_val & 0xc) {
 846                         case 0:
 847                                 break;
 848                         case 0x4:
 849                                 ck_dpll1.rate /= 2;
 850                                 break;
 851                         default:
 852                                 ck_dpll1.rate /= 4;
 853                                 break;
 854                         }
 855                 }
 856         }
 857         propagate_rate(&ck_dpll1);
 858         /* Cache rates for clocks connected to ck_ref (not dpll1) */
 859         propagate_rate(&ck_ref);
 860         omap1_show_rates();
 861         if (machine_is_omap_perseus2() || machine_is_omap_fsample()) {
 862                 /* Select slicer output as OMAP input clock */
 863                 omap_writew(omap_readw(OMAP7XX_PCC_UPLD_CTRL) & ~0x1,
 864                                 OMAP7XX_PCC_UPLD_CTRL);
 865         }
 866
 867         /* Amstrad Delta wants BCLK high when inactive */
 868         if (machine_is_ams_delta())
 869                 omap_writel(omap_readl(ULPD_CLOCK_CTRL) |
 870                                 (1 << SDW_MCLK_INV_BIT),
 871                                 ULPD_CLOCK_CTRL);
 872
 873         /* Turn off DSP and ARM_TIMXO. Make sure ARM_INTHCK is not divided */
 874         /* (on 730, bit 13 must not be cleared) */
 875         if (cpu_is_omap7xx())
 876                 omap_writew(omap_readw(ARM_CKCTL) & 0x2fff, ARM_CKCTL);
 877         else
 878                 omap_writew(omap_readw(ARM_CKCTL) & 0x0fff, ARM_CKCTL);
 879
 880         /* Put DSP/MPUI into reset until needed */
 881         omap_writew(0, ARM_RSTCT1);
 882         omap_writew(1, ARM_RSTCT2);
 883         omap_writew(0x400, ARM_IDLECT1);
 884
 885         /*
 886          * According to OMAP5910 Erratum SYS_DMA_1, bit DMACK_REQ (bit 8)
 887          * of the ARM_IDLECT2 register must be set to zero. The power-on
 888          * default value of this bit is one.
 889          */
 890         omap_writew(0x0000, ARM_IDLECT2);       /* Turn LCD clock off also */
 891
 892         /*
 893          * Only enable those clocks we will need, let the drivers
 894          * enable other clocks as necessary
 895          */
 896         clk_enable(&armper_ck.clk);
 897         clk_enable(&armxor_ck.clk);
 898         clk_enable(&armtim_ck.clk); /* This should be done by timer code */
 899
 900         if (cpu_is_omap15xx())
 901                 clk_enable(&arm_gpio_ck);
 902
 903         return 0;
 904 }
 905
 906 #define OMAP1_DPLL1_SANE_VALUE  60000000
 907
 908 void __init omap1_clk_late_init(void)
 909 {
 910         unsigned long rate = ck_dpll1.rate;
 911
 912         /* Find the highest supported frequency and enable it */
 913         if (omap1_select_table_rate(&virtual_ck_mpu, ~0)) {
 914                 pr_err("System frequencies not set, using default. Check your config.\n");
 915                 /*
 916                  * Reprogramming the DPLL is tricky, it must be done from SRAM.
 917                  */
 918                 omap_sram_reprogram_clock(0x2290, 0x0005);
 919                 ck_dpll1.rate = OMAP1_DPLL1_SANE_VALUE;
 920         }
 921         propagate_rate(&ck_dpll1);
 922         omap1_show_rates();
 923         loops_per_jiffy = cpufreq_scale(loops_per_jiffy, rate, ck_dpll1.rate);
 924 }