1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * omap_hwmod macros, structures 4 * 5 * Copyright (C) 2009-2011 Nokia Corporation 6 * Copyright (C) 2011-2012 Texas Instruments, Inc. 7 * Paul Walmsley 8 * 9 * Created in collaboration with (alphabetical order): Benoît Cousson, 10 * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari 11 * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff 12 * 13 * These headers and macros are used to define OMAP on-chip module 14 * data and their integration with other OMAP modules and Linux. 15 * Copious documentation and references can also be found in the 16 * omap_hwmod code, in arch/arm/mach-omap2/omap_hwmod.c (as of this 17 * writing). 18 * 19 * To do: 20 * - add interconnect error log structures 21 * - init_conn_id_bit (CONNID_BIT_VECTOR) 22 * - implement default hwmod SMS/SDRC flags? 23 * - move Linux-specific data ("non-ROM data") out 24 */ 25 #ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H 26 #define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H 27 28 #include <linux/kernel.h> 29 #include <linux/init.h> 30 #include <linux/list.h> 31 #include <linux/ioport.h> 32 #include <linux/spinlock.h> 33 34 struct omap_device; 35 36 extern struct sysc_regbits omap_hwmod_sysc_type1; 37 extern struct sysc_regbits omap_hwmod_sysc_type2; 38 extern struct sysc_regbits omap_hwmod_sysc_type3; 39 extern struct sysc_regbits omap34xx_sr_sysc_fields; 40 extern struct sysc_regbits omap36xx_sr_sysc_fields; 41 extern struct sysc_regbits omap3_sham_sysc_fields; 42 extern struct sysc_regbits omap3xxx_aes_sysc_fields; 43 extern struct sysc_regbits omap_hwmod_sysc_type_mcasp; 44 extern struct sysc_regbits omap_hwmod_sysc_type_usb_host_fs; 45 46 /* 47 * OCP SYSCONFIG bit shifts/masks TYPE1. These are for IPs compliant 48 * with the original PRCM protocol defined for OMAP2420 49 */ 50 #define SYSC_TYPE1_MIDLEMODE_SHIFT 12 51 #define SYSC_TYPE1_MIDLEMODE_MASK (0x3 << SYSC_TYPE1_MIDLEMODE_SHIFT) 52 #define SYSC_TYPE1_CLOCKACTIVITY_SHIFT 8 53 #define SYSC_TYPE1_CLOCKACTIVITY_MASK (0x3 << SYSC_TYPE1_CLOCKACTIVITY_SHIFT) 54 #define SYSC_TYPE1_SIDLEMODE_SHIFT 3 55 #define SYSC_TYPE1_SIDLEMODE_MASK (0x3 << SYSC_TYPE1_SIDLEMODE_SHIFT) 56 #define SYSC_TYPE1_ENAWAKEUP_SHIFT 2 57 #define SYSC_TYPE1_ENAWAKEUP_MASK (1 << SYSC_TYPE1_ENAWAKEUP_SHIFT) 58 #define SYSC_TYPE1_SOFTRESET_SHIFT 1 59 #define SYSC_TYPE1_SOFTRESET_MASK (1 << SYSC_TYPE1_SOFTRESET_SHIFT) 60 #define SYSC_TYPE1_AUTOIDLE_SHIFT 0 61 #define SYSC_TYPE1_AUTOIDLE_MASK (1 << SYSC_TYPE1_AUTOIDLE_SHIFT) 62 63 /* 64 * OCP SYSCONFIG bit shifts/masks TYPE2. These are for IPs compliant 65 * with the new PRCM protocol defined for new OMAP4 IPs. 66 */ 67 #define SYSC_TYPE2_SOFTRESET_SHIFT 0 68 #define SYSC_TYPE2_SOFTRESET_MASK (1 << SYSC_TYPE2_SOFTRESET_SHIFT) 69 #define SYSC_TYPE2_SIDLEMODE_SHIFT 2 70 #define SYSC_TYPE2_SIDLEMODE_MASK (0x3 << SYSC_TYPE2_SIDLEMODE_SHIFT) 71 #define SYSC_TYPE2_MIDLEMODE_SHIFT 4 72 #define SYSC_TYPE2_MIDLEMODE_MASK (0x3 << SYSC_TYPE2_MIDLEMODE_SHIFT) 73 #define SYSC_TYPE2_DMADISABLE_SHIFT 16 74 #define SYSC_TYPE2_DMADISABLE_MASK (0x1 << SYSC_TYPE2_DMADISABLE_SHIFT) 75 76 /* 77 * OCP SYSCONFIG bit shifts/masks TYPE3. 78 * This is applicable for some IPs present in AM33XX 79 */ 80 #define SYSC_TYPE3_SIDLEMODE_SHIFT 0 81 #define SYSC_TYPE3_SIDLEMODE_MASK (0x3 << SYSC_TYPE3_SIDLEMODE_SHIFT) 82 #define SYSC_TYPE3_MIDLEMODE_SHIFT 2 83 #define SYSC_TYPE3_MIDLEMODE_MASK (0x3 << SYSC_TYPE3_MIDLEMODE_SHIFT) 84 85 /* OCP SYSSTATUS bit shifts/masks */ 86 #define SYSS_RESETDONE_SHIFT 0 87 #define SYSS_RESETDONE_MASK (1 << SYSS_RESETDONE_SHIFT) 88 89 /* Master standby/slave idle mode flags */ 90 #define HWMOD_IDLEMODE_FORCE (1 << 0) 91 #define HWMOD_IDLEMODE_NO (1 << 1) 92 #define HWMOD_IDLEMODE_SMART (1 << 2) 93 #define HWMOD_IDLEMODE_SMART_WKUP (1 << 3) 94 95 /* modulemode control type (SW or HW) */ 96 #define MODULEMODE_HWCTRL 1 97 #define MODULEMODE_SWCTRL 2 98 99 #define DEBUG_OMAP2UART1_FLAGS 0 100 #define DEBUG_OMAP2UART2_FLAGS 0 101 #define DEBUG_OMAP2UART3_FLAGS 0 102 #define DEBUG_OMAP3UART3_FLAGS 0 103 #define DEBUG_OMAP3UART4_FLAGS 0 104 #define DEBUG_OMAP4UART3_FLAGS 0 105 #define DEBUG_OMAP4UART4_FLAGS 0 106 #define DEBUG_TI81XXUART1_FLAGS 0 107 #define DEBUG_TI81XXUART2_FLAGS 0 108 #define DEBUG_TI81XXUART3_FLAGS 0 109 #define DEBUG_AM33XXUART1_FLAGS 0 110 111 #define DEBUG_OMAPUART_FLAGS (HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET) 112 113 #ifdef CONFIG_OMAP_GPMC_DEBUG 114 #define DEBUG_OMAP_GPMC_HWMOD_FLAGS HWMOD_INIT_NO_RESET 115 #else 116 #define DEBUG_OMAP_GPMC_HWMOD_FLAGS 0 117 #endif 118 119 #if defined(CONFIG_DEBUG_OMAP2UART1) 120 #undef DEBUG_OMAP2UART1_FLAGS 121 #define DEBUG_OMAP2UART1_FLAGS DEBUG_OMAPUART_FLAGS 122 #elif defined(CONFIG_DEBUG_OMAP2UART2) 123 #undef DEBUG_OMAP2UART2_FLAGS 124 #define DEBUG_OMAP2UART2_FLAGS DEBUG_OMAPUART_FLAGS 125 #elif defined(CONFIG_DEBUG_OMAP2UART3) 126 #undef DEBUG_OMAP2UART3_FLAGS 127 #define DEBUG_OMAP2UART3_FLAGS DEBUG_OMAPUART_FLAGS 128 #elif defined(CONFIG_DEBUG_OMAP3UART3) 129 #undef DEBUG_OMAP3UART3_FLAGS 130 #define DEBUG_OMAP3UART3_FLAGS DEBUG_OMAPUART_FLAGS 131 #elif defined(CONFIG_DEBUG_OMAP3UART4) 132 #undef DEBUG_OMAP3UART4_FLAGS 133 #define DEBUG_OMAP3UART4_FLAGS DEBUG_OMAPUART_FLAGS 134 #elif defined(CONFIG_DEBUG_OMAP4UART3) 135 #undef DEBUG_OMAP4UART3_FLAGS 136 #define DEBUG_OMAP4UART3_FLAGS DEBUG_OMAPUART_FLAGS 137 #elif defined(CONFIG_DEBUG_OMAP4UART4) 138 #undef DEBUG_OMAP4UART4_FLAGS 139 #define DEBUG_OMAP4UART4_FLAGS DEBUG_OMAPUART_FLAGS 140 #elif defined(CONFIG_DEBUG_TI81XXUART1) 141 #undef DEBUG_TI81XXUART1_FLAGS 142 #define DEBUG_TI81XXUART1_FLAGS DEBUG_OMAPUART_FLAGS 143 #elif defined(CONFIG_DEBUG_TI81XXUART2) 144 #undef DEBUG_TI81XXUART2_FLAGS 145 #define DEBUG_TI81XXUART2_FLAGS DEBUG_OMAPUART_FLAGS 146 #elif defined(CONFIG_DEBUG_TI81XXUART3) 147 #undef DEBUG_TI81XXUART3_FLAGS 148 #define DEBUG_TI81XXUART3_FLAGS DEBUG_OMAPUART_FLAGS 149 #elif defined(CONFIG_DEBUG_AM33XXUART1) 150 #undef DEBUG_AM33XXUART1_FLAGS 151 #define DEBUG_AM33XXUART1_FLAGS DEBUG_OMAPUART_FLAGS 152 #endif 153 154 /** 155 * struct omap_hwmod_rst_info - IPs reset lines use by hwmod 156 * @name: name of the reset line (module local name) 157 * @rst_shift: Offset of the reset bit 158 * @st_shift: Offset of the reset status bit (OMAP2/3 only) 159 * 160 * @name should be something short, e.g., "cpu0" or "rst". It is defined 161 * locally to the hwmod. 162 */ 163 struct omap_hwmod_rst_info { 164 const char *name; 165 u8 rst_shift; 166 u8 st_shift; 167 }; 168 169 /** 170 * struct omap_hwmod_opt_clk - optional clocks used by this hwmod 171 * @role: "sys", "32k", "tv", etc -- for use in clk_get() 172 * @clk: opt clock: OMAP clock name 173 * @_clk: pointer to the struct clk (filled in at runtime) 174 * 175 * The module's interface clock and main functional clock should not 176 * be added as optional clocks. 177 */ 178 struct omap_hwmod_opt_clk { 179 const char *role; 180 const char *clk; 181 struct clk *_clk; 182 }; 183 184 185 /* omap_hwmod_omap2_firewall.flags bits */ 186 #define OMAP_FIREWALL_L3 (1 << 0) 187 #define OMAP_FIREWALL_L4 (1 << 1) 188 189 /** 190 * struct omap_hwmod_omap2_firewall - OMAP2/3 device firewall data 191 * @l3_perm_bit: bit shift for L3_PM_*_PERMISSION_* 192 * @l4_fw_region: L4 firewall region ID 193 * @l4_prot_group: L4 protection group ID 194 * @flags: (see omap_hwmod_omap2_firewall.flags macros above) 195 */ 196 struct omap_hwmod_omap2_firewall { 197 u8 l3_perm_bit; 198 u8 l4_fw_region; 199 u8 l4_prot_group; 200 u8 flags; 201 }; 202 203 /* 204 * omap_hwmod_ocp_if.user bits: these indicate the initiators that use this 205 * interface to interact with the hwmod. Used to add sleep dependencies 206 * when the module is enabled or disabled. 207 */ 208 #define OCP_USER_MPU (1 << 0) 209 #define OCP_USER_SDMA (1 << 1) 210 #define OCP_USER_DSP (1 << 2) 211 #define OCP_USER_IVA (1 << 3) 212 213 /* omap_hwmod_ocp_if.flags bits */ 214 #define OCPIF_SWSUP_IDLE (1 << 0) 215 #define OCPIF_CAN_BURST (1 << 1) 216 217 /* omap_hwmod_ocp_if._int_flags possibilities */ 218 #define _OCPIF_INT_FLAGS_REGISTERED (1 << 0) 219 220 221 /** 222 * struct omap_hwmod_ocp_if - OCP interface data 223 * @master: struct omap_hwmod that initiates OCP transactions on this link 224 * @slave: struct omap_hwmod that responds to OCP transactions on this link 225 * @addr: address space associated with this link 226 * @clk: interface clock: OMAP clock name 227 * @_clk: pointer to the interface struct clk (filled in at runtime) 228 * @fw: interface firewall data 229 * @width: OCP data width 230 * @user: initiators using this interface (see OCP_USER_* macros above) 231 * @flags: OCP interface flags (see OCPIF_* macros above) 232 * @_int_flags: internal flags (see _OCPIF_INT_FLAGS* macros above) 233 * 234 * It may also be useful to add a tag_cnt field for OCP2.x devices. 235 * 236 * Parameter names beginning with an underscore are managed internally by 237 * the omap_hwmod code and should not be set during initialization. 238 */ 239 struct omap_hwmod_ocp_if { 240 struct omap_hwmod *master; 241 struct omap_hwmod *slave; 242 struct omap_hwmod_addr_space *addr; 243 const char *clk; 244 struct clk *_clk; 245 struct list_head node; 246 union { 247 struct omap_hwmod_omap2_firewall omap2; 248 } fw; 249 u8 width; 250 u8 user; 251 u8 flags; 252 u8 _int_flags; 253 }; 254 255 256 /* Macros for use in struct omap_hwmod_sysconfig */ 257 258 /* Flags for use in omap_hwmod_sysconfig.idlemodes */ 259 #define MASTER_STANDBY_SHIFT 4 260 #define SLAVE_IDLE_SHIFT 0 261 #define SIDLE_FORCE (HWMOD_IDLEMODE_FORCE << SLAVE_IDLE_SHIFT) 262 #define SIDLE_NO (HWMOD_IDLEMODE_NO << SLAVE_IDLE_SHIFT) 263 #define SIDLE_SMART (HWMOD_IDLEMODE_SMART << SLAVE_IDLE_SHIFT) 264 #define SIDLE_SMART_WKUP (HWMOD_IDLEMODE_SMART_WKUP << SLAVE_IDLE_SHIFT) 265 #define MSTANDBY_FORCE (HWMOD_IDLEMODE_FORCE << MASTER_STANDBY_SHIFT) 266 #define MSTANDBY_NO (HWMOD_IDLEMODE_NO << MASTER_STANDBY_SHIFT) 267 #define MSTANDBY_SMART (HWMOD_IDLEMODE_SMART << MASTER_STANDBY_SHIFT) 268 #define MSTANDBY_SMART_WKUP (HWMOD_IDLEMODE_SMART_WKUP << MASTER_STANDBY_SHIFT) 269 270 /* omap_hwmod_sysconfig.sysc_flags capability flags */ 271 #define SYSC_HAS_AUTOIDLE (1 << 0) 272 #define SYSC_HAS_SOFTRESET (1 << 1) 273 #define SYSC_HAS_ENAWAKEUP (1 << 2) 274 #define SYSC_HAS_EMUFREE (1 << 3) 275 #define SYSC_HAS_CLOCKACTIVITY (1 << 4) 276 #define SYSC_HAS_SIDLEMODE (1 << 5) 277 #define SYSC_HAS_MIDLEMODE (1 << 6) 278 #define SYSS_HAS_RESET_STATUS (1 << 7) 279 #define SYSC_NO_CACHE (1 << 8) /* XXX SW flag, belongs elsewhere */ 280 #define SYSC_HAS_RESET_STATUS (1 << 9) 281 #define SYSC_HAS_DMADISABLE (1 << 10) 282 283 /* omap_hwmod_sysconfig.clockact flags */ 284 #define CLOCKACT_TEST_BOTH 0x0 285 #define CLOCKACT_TEST_MAIN 0x1 286 #define CLOCKACT_TEST_ICLK 0x2 287 #define CLOCKACT_TEST_NONE 0x3 288 289 /** 290 * struct omap_hwmod_class_sysconfig - hwmod class OCP_SYS* data 291 * @rev_offs: IP block revision register offset (from module base addr) 292 * @sysc_offs: OCP_SYSCONFIG register offset (from module base addr) 293 * @syss_offs: OCP_SYSSTATUS register offset (from module base addr) 294 * @srst_udelay: Delay needed after doing a softreset in usecs 295 * @idlemodes: One or more of {SIDLE,MSTANDBY}_{OFF,FORCE,SMART} 296 * @sysc_flags: SYS{C,S}_HAS* flags indicating SYSCONFIG bits supported 297 * @clockact: the default value of the module CLOCKACTIVITY bits 298 * 299 * @clockact describes to the module which clocks are likely to be 300 * disabled when the PRCM issues its idle request to the module. Some 301 * modules have separate clockdomains for the interface clock and main 302 * functional clock, and can check whether they should acknowledge the 303 * idle request based on the internal module functionality that has 304 * been associated with the clocks marked in @clockact. This field is 305 * only used if HWMOD_SET_DEFAULT_CLOCKACT is set (see below) 306 * 307 * @sysc_fields: structure containing the offset positions of various bits in 308 * SYSCONFIG register. This can be populated using omap_hwmod_sysc_type1 or 309 * omap_hwmod_sysc_type2 defined in omap_hwmod_common_data.c depending on 310 * whether the device ip is compliant with the original PRCM protocol 311 * defined for OMAP2420 or the new PRCM protocol for new OMAP4 IPs. 312 * If the device follows a different scheme for the sysconfig register , 313 * then this field has to be populated with the correct offset structure. 314 */ 315 struct omap_hwmod_class_sysconfig { 316 s32 rev_offs; 317 s32 sysc_offs; 318 s32 syss_offs; 319 u16 sysc_flags; 320 struct sysc_regbits *sysc_fields; 321 u8 srst_udelay; 322 u8 idlemodes; 323 }; 324 325 /** 326 * struct omap_hwmod_omap2_prcm - OMAP2/3-specific PRCM data 327 * @module_offs: PRCM submodule offset from the start of the PRM/CM 328 * @idlest_reg_id: IDLEST register ID (e.g., 3 for CM_IDLEST3) 329 * @idlest_idle_bit: register bit shift for CM_IDLEST slave idle bit 330 * 331 * @prcm_reg_id and @module_bit are specific to the AUTOIDLE, WKST, 332 * WKEN, GRPSEL registers. In an ideal world, no extra information 333 * would be needed for IDLEST information, but alas, there are some 334 * exceptions, so @idlest_reg_id, @idlest_idle_bit, @idlest_stdby_bit 335 * are needed for the IDLEST registers (c.f. 2430 I2CHS, 3430 USBHOST) 336 */ 337 struct omap_hwmod_omap2_prcm { 338 s16 module_offs; 339 u8 idlest_reg_id; 340 u8 idlest_idle_bit; 341 }; 342 343 /* 344 * Possible values for struct omap_hwmod_omap4_prcm.flags 345 * 346 * HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT: Some IP blocks don't have a PRCM 347 * module-level context loss register associated with them; this 348 * flag bit should be set in those cases 349 * HWMOD_OMAP4_ZERO_CLKCTRL_OFFSET: Some IP blocks have a valid CLKCTRL 350 * offset of zero; this flag bit should be set in those cases to 351 * distinguish from hwmods that have no clkctrl offset. 352 * HWMOD_OMAP4_CLKFWK_CLKCTR_CLOCK: Module clockctrl clock is managed 353 * by the common clock framework and not hwmod. 354 */ 355 #define HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT (1 << 0) 356 #define HWMOD_OMAP4_ZERO_CLKCTRL_OFFSET (1 << 1) 357 #define HWMOD_OMAP4_CLKFWK_CLKCTR_CLOCK (1 << 2) 358 359 /** 360 * struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data 361 * @clkctrl_offs: offset of the PRCM clock control register 362 * @rstctrl_offs: offset of the XXX_RSTCTRL register located in the PRM 363 * @context_offs: offset of the RM_*_CONTEXT register 364 * @lostcontext_mask: bitmask for selecting bits from RM_*_CONTEXT register 365 * @rstst_reg: (AM33XX only) address of the XXX_RSTST register in the PRM 366 * @submodule_wkdep_bit: bit shift of the WKDEP range 367 * @flags: PRCM register capabilities for this IP block 368 * @modulemode: allowable modulemodes 369 * @context_lost_counter: Count of module level context lost 370 * 371 * If @lostcontext_mask is not defined, context loss check code uses 372 * whole register without masking. @lostcontext_mask should only be 373 * defined in cases where @context_offs register is shared by two or 374 * more hwmods. 375 */ 376 struct omap_hwmod_omap4_prcm { 377 u16 clkctrl_offs; 378 u16 rstctrl_offs; 379 u16 rstst_offs; 380 u16 context_offs; 381 u32 lostcontext_mask; 382 u8 submodule_wkdep_bit; 383 u8 modulemode; 384 u8 flags; 385 int context_lost_counter; 386 }; 387 388 389 /* 390 * omap_hwmod.flags definitions 391 * 392 * HWMOD_SWSUP_SIDLE: omap_hwmod code should manually bring module in and out 393 * of idle, rather than relying on module smart-idle 394 * HWMOD_SWSUP_MSTANDBY: omap_hwmod code should manually bring module in and 395 * out of standby, rather than relying on module smart-standby 396 * HWMOD_INIT_NO_RESET: don't reset this module at boot - important for 397 * SDRAM controller, etc. XXX probably belongs outside the main hwmod file 398 * XXX Should be HWMOD_SETUP_NO_RESET 399 * HWMOD_INIT_NO_IDLE: don't idle this module at boot - important for SDRAM 400 * controller, etc. XXX probably belongs outside the main hwmod file 401 * XXX Should be HWMOD_SETUP_NO_IDLE 402 * HWMOD_NO_OCP_AUTOIDLE: disable module autoidle (OCP_SYSCONFIG.AUTOIDLE) 403 * when module is enabled, rather than the default, which is to 404 * enable autoidle 405 * HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup 406 * HWMOD_NO_IDLEST: this module does not have idle status - this is the case 407 * only for few initiator modules on OMAP2 & 3. 408 * HWMOD_CONTROL_OPT_CLKS_IN_RESET: Enable all optional clocks during reset. 409 * This is needed for devices like DSS that require optional clocks enabled 410 * in order to complete the reset. Optional clocks will be disabled 411 * again after the reset. 412 * HWMOD_16BIT_REG: Module has 16bit registers 413 * HWMOD_EXT_OPT_MAIN_CLK: The only main functional clock source for 414 * this IP block comes from an off-chip source and is not always 415 * enabled. This prevents the hwmod code from being able to 416 * enable and reset the IP block early. XXX Eventually it should 417 * be possible to query the clock framework for this information. 418 * HWMOD_BLOCK_WFI: Some OMAP peripherals apparently don't work 419 * correctly if the MPU is allowed to go idle while the 420 * peripherals are active. This is apparently true for the I2C on 421 * OMAP2420, and also the EMAC on AM3517/3505. It's unlikely that 422 * this is really true -- we're probably not configuring something 423 * correctly, or this is being abused to deal with some PM latency 424 * issues -- but we're currently suffering from a shortage of 425 * folks who are able to track these issues down properly. 426 * HWMOD_FORCE_MSTANDBY: Always keep MIDLEMODE bits cleared so that device 427 * is kept in force-standby mode. Failing to do so causes PM problems 428 * with musb on OMAP3630 at least. Note that musb has a dedicated register 429 * to control MSTANDBY signal when MIDLEMODE is set to force-standby. 430 * HWMOD_SWSUP_SIDLE_ACT: omap_hwmod code should manually bring the module 431 * out of idle, but rely on smart-idle to the put it back in idle, 432 * so the wakeups are still functional (Only known case for now is UART) 433 * HWMOD_RECONFIG_IO_CHAIN: omap_hwmod code needs to reconfigure wake-up 434 * events by calling _reconfigure_io_chain() when a device is enabled 435 * or idled. 436 * HWMOD_OPT_CLKS_NEEDED: The optional clocks are needed for the module to 437 * operate and they need to be handled at the same time as the main_clk. 438 * HWMOD_NO_IDLE: Do not idle the hwmod at all. Useful to handle certain 439 * IPs like CPSW on DRA7, where clocks to this module cannot be disabled. 440 * HWMOD_CLKDM_NOAUTO: Allows the hwmod's clockdomain to be prevented from 441 * entering HW_AUTO while hwmod is active. This is needed to workaround 442 * some modules which don't function correctly with HW_AUTO. For example, 443 * DCAN on DRA7x SoC needs this to workaround errata i893. 444 */ 445 #define HWMOD_SWSUP_SIDLE (1 << 0) 446 #define HWMOD_SWSUP_MSTANDBY (1 << 1) 447 #define HWMOD_INIT_NO_RESET (1 << 2) 448 #define HWMOD_INIT_NO_IDLE (1 << 3) 449 #define HWMOD_NO_OCP_AUTOIDLE (1 << 4) 450 #define HWMOD_SET_DEFAULT_CLOCKACT (1 << 5) 451 #define HWMOD_NO_IDLEST (1 << 6) 452 #define HWMOD_CONTROL_OPT_CLKS_IN_RESET (1 << 7) 453 #define HWMOD_16BIT_REG (1 << 8) 454 #define HWMOD_EXT_OPT_MAIN_CLK (1 << 9) 455 #define HWMOD_BLOCK_WFI (1 << 10) 456 #define HWMOD_FORCE_MSTANDBY (1 << 11) 457 #define HWMOD_SWSUP_SIDLE_ACT (1 << 12) 458 #define HWMOD_RECONFIG_IO_CHAIN (1 << 13) 459 #define HWMOD_OPT_CLKS_NEEDED (1 << 14) 460 #define HWMOD_NO_IDLE (1 << 15) 461 #define HWMOD_CLKDM_NOAUTO (1 << 16) 462 463 /* 464 * omap_hwmod._int_flags definitions 465 * These are for internal use only and are managed by the omap_hwmod code. 466 * 467 * _HWMOD_NO_MPU_PORT: no path exists for the MPU to write to this module 468 * _HWMOD_SYSCONFIG_LOADED: set when the OCP_SYSCONFIG value has been cached 469 * _HWMOD_SKIP_ENABLE: set if hwmod enabled during init (HWMOD_INIT_NO_IDLE) - 470 * causes the first call to _enable() to only update the pinmux 471 */ 472 #define _HWMOD_NO_MPU_PORT (1 << 0) 473 #define _HWMOD_SYSCONFIG_LOADED (1 << 1) 474 #define _HWMOD_SKIP_ENABLE (1 << 2) 475 476 /* 477 * omap_hwmod._state definitions 478 * 479 * INITIALIZED: reset (optionally), initialized, enabled, disabled 480 * (optionally) 481 * 482 * 483 */ 484 #define _HWMOD_STATE_UNKNOWN 0 485 #define _HWMOD_STATE_REGISTERED 1 486 #define _HWMOD_STATE_CLKS_INITED 2 487 #define _HWMOD_STATE_INITIALIZED 3 488 #define _HWMOD_STATE_ENABLED 4 489 #define _HWMOD_STATE_IDLE 5 490 #define _HWMOD_STATE_DISABLED 6 491 492 #ifdef CONFIG_PM 493 #define _HWMOD_STATE_DEFAULT _HWMOD_STATE_IDLE 494 #else 495 #define _HWMOD_STATE_DEFAULT _HWMOD_STATE_ENABLED 496 #endif 497 498 /** 499 * struct omap_hwmod_class - the type of an IP block 500 * @name: name of the hwmod_class 501 * @sysc: device SYSCONFIG/SYSSTATUS register data 502 * @pre_shutdown: ptr to fn to be executed immediately prior to device shutdown 503 * @reset: ptr to fn to be executed in place of the standard hwmod reset fn 504 * @lock: ptr to fn to be executed to lock IP registers 505 * @unlock: ptr to fn to be executed to unlock IP registers 506 * 507 * Represent the class of a OMAP hardware "modules" (e.g. timer, 508 * smartreflex, gpio, uart...) 509 * 510 * @pre_shutdown is a function that will be run immediately before 511 * hwmod clocks are disabled, etc. It is intended for use for hwmods 512 * like the MPU watchdog, which cannot be disabled with the standard 513 * omap_hwmod_shutdown(). The function should return 0 upon success, 514 * or some negative error upon failure. Returning an error will cause 515 * omap_hwmod_shutdown() to abort the device shutdown and return an 516 * error. 517 * 518 * If @reset is defined, then the function it points to will be 519 * executed in place of the standard hwmod _reset() code in 520 * mach-omap2/omap_hwmod.c. This is needed for IP blocks which have 521 * unusual reset sequences - usually processor IP blocks like the IVA. 522 */ 523 struct omap_hwmod_class { 524 const char *name; 525 struct omap_hwmod_class_sysconfig *sysc; 526 int (*pre_shutdown)(struct omap_hwmod *oh); 527 int (*reset)(struct omap_hwmod *oh); 528 void (*lock)(struct omap_hwmod *oh); 529 void (*unlock)(struct omap_hwmod *oh); 530 }; 531 532 /** 533 * struct omap_hwmod - integration data for OMAP hardware "modules" (IP blocks) 534 * @name: name of the hwmod 535 * @class: struct omap_hwmod_class * to the class of this hwmod 536 * @od: struct omap_device currently associated with this hwmod (internal use) 537 * @prcm: PRCM data pertaining to this hwmod 538 * @main_clk: main clock: OMAP clock name 539 * @_clk: pointer to the main struct clk (filled in at runtime) 540 * @opt_clks: other device clocks that drivers can request (0..*) 541 * @voltdm: pointer to voltage domain (filled in at runtime) 542 * @dev_attr: arbitrary device attributes that can be passed to the driver 543 * @_sysc_cache: internal-use hwmod flags 544 * @mpu_rt_idx: index of device address space for register target (for DT boot) 545 * @_mpu_rt_va: cached register target start address (internal use) 546 * @_mpu_port: cached MPU register target slave (internal use) 547 * @opt_clks_cnt: number of @opt_clks 548 * @master_cnt: number of @master entries 549 * @slaves_cnt: number of @slave entries 550 * @response_lat: device OCP response latency (in interface clock cycles) 551 * @_int_flags: internal-use hwmod flags 552 * @_state: internal-use hwmod state 553 * @_postsetup_state: internal-use state to leave the hwmod in after _setup() 554 * @flags: hwmod flags (documented below) 555 * @_lock: spinlock serializing operations on this hwmod 556 * @node: list node for hwmod list (internal use) 557 * @parent_hwmod: (temporary) a pointer to the hierarchical parent of this hwmod 558 * 559 * @main_clk refers to this module's "main clock," which for our 560 * purposes is defined as "the functional clock needed for register 561 * accesses to complete." Modules may not have a main clock if the 562 * interface clock also serves as a main clock. 563 * 564 * Parameter names beginning with an underscore are managed internally by 565 * the omap_hwmod code and should not be set during initialization. 566 * 567 * @masters and @slaves are now deprecated. 568 * 569 * @parent_hwmod is temporary; there should be no need for it, as this 570 * information should already be expressed in the OCP interface 571 * structures. @parent_hwmod is present as a workaround until we improve 572 * handling for hwmods with multiple parents (e.g., OMAP4+ DSS with 573 * multiple register targets across different interconnects). 574 */ 575 struct omap_hwmod { 576 const char *name; 577 struct omap_hwmod_class *class; 578 struct omap_device *od; 579 struct omap_hwmod_rst_info *rst_lines; 580 union { 581 struct omap_hwmod_omap2_prcm omap2; 582 struct omap_hwmod_omap4_prcm omap4; 583 } prcm; 584 const char *main_clk; 585 struct clk *_clk; 586 struct omap_hwmod_opt_clk *opt_clks; 587 const char *clkdm_name; 588 struct clockdomain *clkdm; 589 struct list_head slave_ports; /* connect to *_TA */ 590 void *dev_attr; 591 u32 _sysc_cache; 592 void __iomem *_mpu_rt_va; 593 spinlock_t _lock; 594 struct lock_class_key hwmod_key; /* unique lock class */ 595 struct list_head node; 596 struct omap_hwmod_ocp_if *_mpu_port; 597 u32 flags; 598 u8 mpu_rt_idx; 599 u8 response_lat; 600 u8 rst_lines_cnt; 601 u8 opt_clks_cnt; 602 u8 slaves_cnt; 603 u8 hwmods_cnt; 604 u8 _int_flags; 605 u8 _state; 606 u8 _postsetup_state; 607 struct omap_hwmod *parent_hwmod; 608 }; 609 610 #ifdef CONFIG_OMAP_HWMOD 611 612 struct device_node; 613 614 struct omap_hwmod *omap_hwmod_lookup(const char *name); 615 int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data), 616 void *data); 617 618 int omap_hwmod_parse_module_range(struct omap_hwmod *oh, 619 struct device_node *np, 620 struct resource *res); 621 622 struct ti_sysc_module_data; 623 struct ti_sysc_cookie; 624 625 int omap_hwmod_init_module(struct device *dev, 626 const struct ti_sysc_module_data *data, 627 struct ti_sysc_cookie *cookie); 628 629 int omap_hwmod_enable(struct omap_hwmod *oh); 630 int omap_hwmod_idle(struct omap_hwmod *oh); 631 int omap_hwmod_shutdown(struct omap_hwmod *oh); 632 633 int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name); 634 int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name); 635 636 void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs); 637 u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs); 638 int omap_hwmod_softreset(struct omap_hwmod *oh); 639 640 void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh); 641 642 int omap_hwmod_for_each_by_class(const char *classname, 643 int (*fn)(struct omap_hwmod *oh, 644 void *user), 645 void *user); 646 647 int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state); 648 649 extern void __init omap_hwmod_init(void); 650 651 #else /* CONFIG_OMAP_HWMOD */ 652 653 static inline int omap_hwmod_for_each_by_class(const char * classname,int (* fn)(struct omap_hwmod * oh,void * user),void * user)654 omap_hwmod_for_each_by_class(const char *classname, 655 int (*fn)(struct omap_hwmod *oh, void *user), 656 void *user) 657 { 658 return 0; 659 } 660 #endif /* CONFIG_OMAP_HWMOD */ 661 662 /* 663 * Chip variant-specific hwmod init routines - XXX should be converted 664 * to use initcalls once the initial boot ordering is straightened out 665 */ 666 extern int omap2420_hwmod_init(void); 667 extern int omap2430_hwmod_init(void); 668 extern int omap3xxx_hwmod_init(void); 669 extern int dm814x_hwmod_init(void); 670 extern int dm816x_hwmod_init(void); 671 672 extern int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois); 673 674 #endif 675