1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) Marvell International Ltd. and its affiliates
7 #include "mv_ddr_common.h"
17 static u32 ui_xor_regs_ctrl_backup;
18 static u32 ui_xor_regs_base_backup[MAX_CS_NUM + 1];
19 static u32 ui_xor_regs_mask_backup[MAX_CS_NUM + 1];
21 void mv_sys_xor_init(u32 num_of_cs, u32 cs_ena, uint64_t cs_size, u32 base_delta)
23 u32 reg, ui, cs_count;
24 uint64_t base, size_mask;
26 ui_xor_regs_ctrl_backup = reg_read(XOR_WINDOW_CTRL_REG(0, 0));
27 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
28 ui_xor_regs_base_backup[ui] =
29 reg_read(XOR_BASE_ADDR_REG(0, ui));
30 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
31 ui_xor_regs_mask_backup[ui] =
32 reg_read(XOR_SIZE_MASK_REG(0, ui));
35 for (ui = 0, cs_count = 0;
36 (cs_count < num_of_cs) && (ui < 8);
38 if (cs_ena & (1 << ui)) {
39 /* Enable Window x for each CS */
41 /* Enable Window x for each CS */
42 reg |= (0x3 << ((ui * 2) + 16));
46 reg_write(XOR_WINDOW_CTRL_REG(0, 0), reg);
49 for (ui = 0, cs_count = 0;
50 (cs_count < num_of_cs) && (ui < 8);
52 if (cs_ena & (1 << ui)) {
54 * window x - Base - 0x00000000,
55 * Attribute 0x0e - DRAM
57 base = cs_size * ui + base_delta;
58 /* fixed size 2GB for each CS */
59 size_mask = 0x7FFF0000;
75 /* configure as shared transaction */
81 reg_write(XOR_BASE_ADDR_REG(0, ui), (u32)base);
82 size_mask = (cs_size / _64K) - 1;
83 size_mask = (size_mask << XESMRX_SIZE_MASK_OFFS) & XESMRX_SIZE_MASK_MASK;
85 reg_write(XOR_SIZE_MASK_REG(0, ui), (u32)size_mask);
94 void mv_sys_xor_finish(void)
98 reg_write(XOR_WINDOW_CTRL_REG(0, 0), ui_xor_regs_ctrl_backup);
99 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
100 reg_write(XOR_BASE_ADDR_REG(0, ui),
101 ui_xor_regs_base_backup[ui]);
102 for (ui = 0; ui < MAX_CS_NUM + 1; ui++)
103 reg_write(XOR_SIZE_MASK_REG(0, ui),
104 ui_xor_regs_mask_backup[ui]);
106 reg_write(XOR_ADDR_OVRD_REG(0, 0), 0);
110 * mv_xor_hal_init - Initialize XOR engine
113 * This function initialize XOR unit.
121 * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
123 void mv_xor_hal_init(u32 xor_chan_num)
127 /* Abort any XOR activity & set default configuration */
128 for (i = 0; i < xor_chan_num; i++) {
129 mv_xor_command_set(i, MV_STOP);
130 mv_xor_ctrl_set(i, (1 << XEXCR_REG_ACC_PROTECT_OFFS) |
131 (4 << XEXCR_DST_BURST_LIMIT_OFFS) |
132 (4 << XEXCR_SRC_BURST_LIMIT_OFFS));
137 * mv_xor_ctrl_set - Set XOR channel control registers
147 * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
149 * This function does not modify the Operation_mode field of control register.
151 int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl)
155 /* update the XOR Engine [0..1] Configuration Registers (XEx_c_r) */
156 old_value = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan))) &
157 XEXCR_OPERATION_MODE_MASK;
158 xor_ctrl &= ~XEXCR_OPERATION_MODE_MASK;
159 xor_ctrl |= old_value;
160 reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), xor_ctrl);
165 int mv_xor_mem_init(u32 chan, u32 start_ptr, unsigned long long block_size,
166 u32 init_val_high, u32 init_val_low)
170 if (block_size == _4G)
173 /* Parameter checking */
174 if (chan >= MV_XOR_MAX_CHAN)
177 if (MV_ACTIVE == mv_xor_state_get(chan))
180 if ((block_size < XEXBSR_BLOCK_SIZE_MIN_VALUE) ||
181 (block_size > XEXBSR_BLOCK_SIZE_MAX_VALUE))
184 /* set the operation mode to Memory Init */
185 temp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
186 temp &= ~XEXCR_OPERATION_MODE_MASK;
187 temp |= XEXCR_OPERATION_MODE_MEM_INIT;
188 reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), temp);
191 * update the start_ptr field in XOR Engine [0..1] Destination Pointer
194 reg_write(XOR_DST_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)), start_ptr);
197 * update the Block_size field in the XOR Engine[0..1] Block Size
200 reg_write(XOR_BLOCK_SIZE_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
204 * update the field Init_val_l in the XOR Engine Initial Value Register
207 reg_write(XOR_INIT_VAL_LOW_REG(XOR_UNIT(chan)), init_val_low);
210 * update the field Init_val_h in the XOR Engine Initial Value Register
213 reg_write(XOR_INIT_VAL_HIGH_REG(XOR_UNIT(chan)), init_val_high);
216 reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
217 XEXACTR_XESTART_MASK);
223 * mv_xor_state_get - Get XOR channel state.
226 * XOR channel activity state can be active, idle, paused.
227 * This function retrunes the channel activity state.
230 * chan - the channel number
236 * XOR_CHANNEL_IDLE - If the engine is idle.
237 * XOR_CHANNEL_ACTIVE - If the engine is busy.
238 * XOR_CHANNEL_PAUSED - If the engine is paused.
239 * MV_UNDEFINED_STATE - If the engine state is undefind or there is no
242 enum mv_state mv_xor_state_get(u32 chan)
246 /* Parameter checking */
247 if (chan >= MV_XOR_MAX_CHAN) {
248 DB(printf("%s: ERR. Invalid chan num %d\n", __func__, chan));
249 return MV_UNDEFINED_STATE;
252 /* read the current state */
253 state = reg_read(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
254 state &= XEXACTR_XESTATUS_MASK;
256 /* return the state */
258 case XEXACTR_XESTATUS_IDLE:
260 case XEXACTR_XESTATUS_ACTIVE:
262 case XEXACTR_XESTATUS_PAUSED:
266 return MV_UNDEFINED_STATE;
270 * mv_xor_command_set - Set command of XOR channel
273 * XOR channel can be started, idle, paused and restarted.
274 * Paused can be set only if channel is active.
275 * Start can be set only if channel is idle or paused.
276 * Restart can be set only if channel is paused.
277 * Stop can be set only if channel is active.
280 * chan - The channel number
281 * command - The command type (start, stop, restart, pause)
287 * MV_OK on success , MV_BAD_PARAM on erroneous parameter, MV_ERROR on
288 * undefind XOR engine mode
290 int mv_xor_command_set(u32 chan, enum mv_command command)
294 /* Parameter checking */
295 if (chan >= MV_XOR_MAX_CHAN) {
296 DB(printf("%s: ERR. Invalid chan num %d\n", __func__, chan));
300 /* get the current state */
301 state = mv_xor_state_get(chan);
303 if ((command == MV_START) && (state == MV_IDLE)) {
304 /* command is start and current state is idle */
305 reg_bit_set(XOR_ACTIVATION_REG
306 (XOR_UNIT(chan), XOR_CHAN(chan)),
307 XEXACTR_XESTART_MASK);
309 } else if ((command == MV_STOP) && (state == MV_ACTIVE)) {
310 /* command is stop and current state is active */
311 reg_bit_set(XOR_ACTIVATION_REG
312 (XOR_UNIT(chan), XOR_CHAN(chan)),
313 XEXACTR_XESTOP_MASK);
315 } else if (((enum mv_state)command == MV_PAUSED) &&
316 (state == MV_ACTIVE)) {
317 /* command is paused and current state is active */
318 reg_bit_set(XOR_ACTIVATION_REG
319 (XOR_UNIT(chan), XOR_CHAN(chan)),
320 XEXACTR_XEPAUSE_MASK);
322 } else if ((command == MV_RESTART) && (state == MV_PAUSED)) {
323 /* command is restart and current state is paused */
324 reg_bit_set(XOR_ACTIVATION_REG
325 (XOR_UNIT(chan), XOR_CHAN(chan)),
326 XEXACTR_XERESTART_MASK);
328 } else if ((command == MV_STOP) && (state == MV_IDLE)) {
329 /* command is stop and current state is active */
333 /* illegal command */
334 DB(printf("%s: ERR. Illegal command\n", __func__));
339 void ddr3_new_tip_ecc_scrub(void)
343 uint64_t total_mem_size, cs_mem_size = 0;
345 printf("DDR Training Sequence - Start scrubbing\n");
346 max_cs = mv_ddr_cs_num_get();
347 for (cs_c = 0; cs_c < max_cs; cs_c++)
350 #if defined(CONFIG_ARMADA_38X) || defined(CONFIG_ARMADA_39X)
351 /* all chip-selects are of same size */
352 ddr3_calc_mem_cs_size(0, &cs_mem_size);
355 mv_sys_xor_init(max_cs, cs_ena, cs_mem_size, 0);
356 total_mem_size = max_cs * cs_mem_size;
357 mv_xor_mem_init(0, 0, total_mem_size, 0xdeadbeef, 0xdeadbeef);
358 /* wait for previous transfer completion */
359 while (mv_xor_state_get(0) != MV_IDLE)
361 /* Return XOR State */
364 printf("DDR3 Training Sequence - End scrubbing\n");
368 * mv_xor_transfer - Transfer data from source to destination in one of
369 * three modes: XOR, CRC32 or DMA
372 * This function initiates XOR channel, according to function parameters,
373 * in order to perform XOR, CRC32 or DMA transaction.
374 * To gain maximum performance the user is asked to keep the following
376 * 1) Selected engine is available (not busy).
377 * 2) This module does not take into consideration CPU MMU issues.
378 * In order for the XOR engine to access the appropriate source
379 * and destination, address parameters must be given in system
381 * 3) This API does not take care of cache coherency issues. The source,
382 * destination and, in case of chain, the descriptor list are assumed
383 * to be cache coherent.
384 * 4) Parameters validity.
387 * chan - XOR channel number.
388 * type - One of three: XOR, CRC32 and DMA operations.
389 * xor_chain_ptr - address of chain pointer
395 * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
397 *******************************************************************************/
398 int mv_xor_transfer(u32 chan, enum xor_type type, u32 xor_chain_ptr)
402 /* Parameter checking */
403 if (chan >= MV_XOR_MAX_CHAN) {
404 DB(printf("%s: ERR. Invalid chan num %d\n", __func__, chan));
407 if (mv_xor_state_get(chan) == MV_ACTIVE) {
408 DB(printf("%s: ERR. Channel is already active\n", __func__));
411 if (xor_chain_ptr == 0x0) {
412 DB(printf("%s: ERR. xor_chain_ptr is NULL pointer\n", __func__));
416 /* read configuration register and mask the operation mode field */
417 temp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
418 temp &= ~XEXCR_OPERATION_MODE_MASK;
422 if ((xor_chain_ptr & XEXDPR_DST_PTR_XOR_MASK) != 0) {
423 DB(printf("%s: ERR. Invalid chain pointer (bits [5:0] must be cleared)\n",
427 /* set the operation mode to XOR */
428 temp |= XEXCR_OPERATION_MODE_XOR;
431 if ((xor_chain_ptr & XEXDPR_DST_PTR_DMA_MASK) != 0) {
432 DB(printf("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
436 /* set the operation mode to DMA */
437 temp |= XEXCR_OPERATION_MODE_DMA;
440 if ((xor_chain_ptr & XEXDPR_DST_PTR_CRC_MASK) != 0) {
441 DB(printf("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
445 /* set the operation mode to CRC32 */
446 temp |= XEXCR_OPERATION_MODE_CRC;
452 /* write the operation mode to the register */
453 reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), temp);
455 * update the NextDescPtr field in the XOR Engine [0..1] Next Descriptor
456 * Pointer Register (XExNDPR)
458 reg_write(XOR_NEXT_DESC_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
462 reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
463 XEXACTR_XESTART_MASK);