1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011-12 The Chromium OS Authors.
5 * This file is derived from the flashrom project.
8 #define LOG_CATEGORY UCLASS_SPI
11 #include <bootstage.h>
14 #include <dt-structs.h>
22 #include <spi_flash.h>
25 #include <asm/fast_spi.h>
28 #include <linux/sizes.h>
33 #define debug_trace(fmt, args...) debug(fmt, ##args)
35 #define debug_trace(x, args...)
38 struct ich_spi_platdata {
39 #if CONFIG_IS_ENABLED(OF_PLATDATA)
40 struct dtd_intel_fast_spi dtplat;
42 enum ich_version ich_version; /* Controller version, 7 or 9 */
43 bool lockdown; /* lock down controller settings? */
44 ulong mmio_base; /* Base of MMIO registers */
45 pci_dev_t bdf; /* PCI address used by of-platdata */
46 bool hwseq; /* Use hardware sequencing (not s/w) */
49 static u8 ich_readb(struct ich_spi_priv *priv, int reg)
51 u8 value = readb(priv->base + reg);
53 debug_trace("read %2.2x from %4.4x\n", value, reg);
58 static u16 ich_readw(struct ich_spi_priv *priv, int reg)
60 u16 value = readw(priv->base + reg);
62 debug_trace("read %4.4x from %4.4x\n", value, reg);
67 static u32 ich_readl(struct ich_spi_priv *priv, int reg)
69 u32 value = readl(priv->base + reg);
71 debug_trace("read %8.8x from %4.4x\n", value, reg);
76 static void ich_writeb(struct ich_spi_priv *priv, u8 value, int reg)
78 writeb(value, priv->base + reg);
79 debug_trace("wrote %2.2x to %4.4x\n", value, reg);
82 static void ich_writew(struct ich_spi_priv *priv, u16 value, int reg)
84 writew(value, priv->base + reg);
85 debug_trace("wrote %4.4x to %4.4x\n", value, reg);
88 static void ich_writel(struct ich_spi_priv *priv, u32 value, int reg)
90 writel(value, priv->base + reg);
91 debug_trace("wrote %8.8x to %4.4x\n", value, reg);
94 static void write_reg(struct ich_spi_priv *priv, const void *value,
95 int dest_reg, uint32_t size)
97 memcpy_toio(priv->base + dest_reg, value, size);
100 static void read_reg(struct ich_spi_priv *priv, int src_reg, void *value,
103 memcpy_fromio(value, priv->base + src_reg, size);
106 static void ich_set_bbar(struct ich_spi_priv *ctlr, uint32_t minaddr)
108 const uint32_t bbar_mask = 0x00ffff00;
109 uint32_t ichspi_bbar;
112 minaddr &= bbar_mask;
113 ichspi_bbar = ich_readl(ctlr, ctlr->bbar) & ~bbar_mask;
114 ichspi_bbar |= minaddr;
115 ich_writel(ctlr, ichspi_bbar, ctlr->bbar);
119 /* @return 1 if the SPI flash supports the 33MHz speed */
120 static bool ich9_can_do_33mhz(struct udevice *dev)
122 struct ich_spi_priv *priv = dev_get_priv(dev);
125 if (!CONFIG_IS_ENABLED(PCI))
127 /* Observe SPI Descriptor Component Section 0 */
128 dm_pci_write_config32(priv->pch, 0xb0, 0x1000);
130 /* Extract the Write/Erase SPI Frequency from descriptor */
131 dm_pci_read_config32(priv->pch, 0xb4, &fdod);
133 /* Bits 23:21 have the fast read clock frequency, 0=20MHz, 1=33MHz */
134 speed = (fdod >> 21) & 7;
139 static void spi_lock_down(struct ich_spi_platdata *plat, void *sbase)
141 if (plat->ich_version == ICHV_7) {
142 struct ich7_spi_regs *ich7_spi = sbase;
144 setbits_le16(&ich7_spi->spis, SPIS_LOCK);
145 } else if (plat->ich_version == ICHV_9) {
146 struct ich9_spi_regs *ich9_spi = sbase;
148 setbits_le16(&ich9_spi->hsfs, HSFS_FLOCKDN);
152 static bool spi_lock_status(struct ich_spi_platdata *plat, void *sbase)
156 if (plat->ich_version == ICHV_7) {
157 struct ich7_spi_regs *ich7_spi = sbase;
159 lock = readw(&ich7_spi->spis) & SPIS_LOCK;
160 } else if (plat->ich_version == ICHV_9) {
161 struct ich9_spi_regs *ich9_spi = sbase;
163 lock = readw(&ich9_spi->hsfs) & HSFS_FLOCKDN;
169 static int spi_setup_opcode(struct ich_spi_priv *ctlr, struct spi_trans *trans,
173 uint8_t opmenu[ctlr->menubytes];
176 /* The lock is off, so just use index 0. */
177 ich_writeb(ctlr, trans->opcode, ctlr->opmenu);
178 optypes = ich_readw(ctlr, ctlr->optype);
179 optypes = (optypes & 0xfffc) | (trans->type & 0x3);
180 ich_writew(ctlr, optypes, ctlr->optype);
183 /* The lock is on. See if what we need is on the menu. */
185 uint16_t opcode_index;
187 /* Write Enable is handled as atomic prefix */
188 if (trans->opcode == SPI_OPCODE_WREN)
191 read_reg(ctlr, ctlr->opmenu, opmenu, sizeof(opmenu));
192 for (opcode_index = 0; opcode_index < ctlr->menubytes;
194 if (opmenu[opcode_index] == trans->opcode)
198 if (opcode_index == ctlr->menubytes) {
199 debug("ICH SPI: Opcode %x not found\n", trans->opcode);
203 optypes = ich_readw(ctlr, ctlr->optype);
204 optype = (optypes >> (opcode_index * 2)) & 0x3;
206 if (optype != trans->type) {
207 debug("ICH SPI: Transaction doesn't fit type %d\n",
216 * Wait for up to 6s til status register bit(s) turn 1 (in case wait_til_set
217 * below is true) or 0. In case the wait was for the bit(s) to set - write
218 * those bits back, which would cause resetting them.
220 * Return the last read status value on success or -1 on failure.
222 static int ich_status_poll(struct ich_spi_priv *ctlr, u16 bitmask,
225 int timeout = 600000; /* This will result in 6s */
229 status = ich_readw(ctlr, ctlr->status);
230 if (wait_til_set ^ ((status & bitmask) == 0)) {
232 ich_writew(ctlr, status & bitmask,
239 debug("ICH SPI: SCIP timeout, read %x, expected %x, wts %x %x\n",
240 status, bitmask, wait_til_set, status & bitmask);
245 static void ich_spi_config_opcode(struct udevice *dev)
247 struct ich_spi_priv *ctlr = dev_get_priv(dev);
250 * PREOP, OPTYPE, OPMENU1/OPMENU2 registers can be locked down
251 * to prevent accidental or intentional writes. Before they get
252 * locked down, these registers should be initialized properly.
254 ich_writew(ctlr, SPI_OPPREFIX, ctlr->preop);
255 ich_writew(ctlr, SPI_OPTYPE, ctlr->optype);
256 ich_writel(ctlr, SPI_OPMENU_LOWER, ctlr->opmenu);
257 ich_writel(ctlr, SPI_OPMENU_UPPER, ctlr->opmenu + sizeof(u32));
260 static int ich_spi_exec_op_swseq(struct spi_slave *slave,
261 const struct spi_mem_op *op)
263 struct udevice *bus = dev_get_parent(slave->dev);
264 struct ich_spi_platdata *plat = dev_get_platdata(bus);
265 struct ich_spi_priv *ctlr = dev_get_priv(bus);
267 int16_t opcode_index;
270 struct spi_trans *trans = &ctlr->trans;
271 bool lock = spi_lock_status(plat, ctlr->base);
278 if (op->data.nbytes) {
279 if (op->data.dir == SPI_MEM_DATA_IN) {
280 trans->in = op->data.buf.in;
281 trans->bytesin = op->data.nbytes;
283 trans->out = op->data.buf.out;
284 trans->bytesout = op->data.nbytes;
288 if (trans->opcode != op->cmd.opcode)
289 trans->opcode = op->cmd.opcode;
291 if (lock && trans->opcode == SPI_OPCODE_WRDIS)
294 if (trans->opcode == SPI_OPCODE_WREN) {
296 * Treat Write Enable as Atomic Pre-Op if possible
297 * in order to prevent the Management Engine from
298 * issuing a transaction between WREN and DATA.
301 ich_writew(ctlr, trans->opcode, ctlr->preop);
305 ret = ich_status_poll(ctlr, SPIS_SCIP, 0);
309 if (plat->ich_version == ICHV_7)
310 ich_writew(ctlr, SPIS_CDS | SPIS_FCERR, ctlr->status);
312 ich_writeb(ctlr, SPIS_CDS | SPIS_FCERR, ctlr->status);
314 /* Try to guess spi transaction type */
315 if (op->data.dir == SPI_MEM_DATA_OUT) {
317 trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS;
319 trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS;
322 trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS;
324 trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS;
326 /* Special erase case handling */
327 if (op->addr.nbytes && !op->data.buswidth)
328 trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS;
330 opcode_index = spi_setup_opcode(ctlr, trans, lock);
331 if (opcode_index < 0)
334 if (op->addr.nbytes) {
335 trans->offset = op->addr.val;
339 if (ctlr->speed && ctlr->max_speed >= 33000000) {
342 byte = ich_readb(ctlr, ctlr->speed);
343 if (ctlr->cur_speed >= 33000000)
344 byte |= SSFC_SCF_33MHZ;
346 byte &= ~SSFC_SCF_33MHZ;
347 ich_writeb(ctlr, byte, ctlr->speed);
350 /* Preset control fields */
351 control = SPIC_SCGO | ((opcode_index & 0x07) << 4);
353 /* Issue atomic preop cycle if needed */
354 if (ich_readw(ctlr, ctlr->preop))
357 if (!trans->bytesout && !trans->bytesin) {
358 /* SPI addresses are 24 bit only */
360 ich_writel(ctlr, trans->offset & 0x00FFFFFF,
364 * This is a 'no data' command (like Write Enable), its
365 * bitesout size was 1, decremented to zero while executing
366 * spi_setup_opcode() above. Tell the chip to send the
369 ich_writew(ctlr, control, ctlr->control);
371 /* wait for the result */
372 status = ich_status_poll(ctlr, SPIS_CDS | SPIS_FCERR, 1);
376 if (status & SPIS_FCERR) {
377 debug("ICH SPI: Command transaction error\n");
384 while (trans->bytesout || trans->bytesin) {
385 uint32_t data_length;
387 /* SPI addresses are 24 bit only */
388 ich_writel(ctlr, trans->offset & 0x00FFFFFF, ctlr->addr);
391 data_length = min(trans->bytesout, ctlr->databytes);
393 data_length = min(trans->bytesin, ctlr->databytes);
395 /* Program data into FDATA0 to N */
396 if (trans->bytesout) {
397 write_reg(ctlr, trans->out, ctlr->data, data_length);
398 trans->bytesout -= data_length;
401 /* Add proper control fields' values */
402 control &= ~((ctlr->databytes - 1) << 8);
404 control |= (data_length - 1) << 8;
407 ich_writew(ctlr, control, ctlr->control);
409 /* Wait for Cycle Done Status or Flash Cycle Error */
410 status = ich_status_poll(ctlr, SPIS_CDS | SPIS_FCERR, 1);
414 if (status & SPIS_FCERR) {
415 debug("ICH SPI: Data transaction error %x\n", status);
419 if (trans->bytesin) {
420 read_reg(ctlr, ctlr->data, trans->in, data_length);
421 trans->bytesin -= data_length;
425 /* Clear atomic preop now that xfer is done */
427 ich_writew(ctlr, 0, ctlr->preop);
433 * Ensure read/write xfer len is not greater than SPIBAR_FDATA_FIFO_SIZE and
434 * that the operation does not cross page boundary.
436 static uint get_xfer_len(u32 offset, int len, int page_size)
438 uint xfer_len = min(len, SPIBAR_FDATA_FIFO_SIZE);
439 uint bytes_left = ALIGN(offset, page_size) - offset;
442 xfer_len = min(xfer_len, bytes_left);
447 /* Fill FDATAn FIFO in preparation for a write transaction */
448 static void fill_xfer_fifo(struct fast_spi_regs *regs, const void *data,
451 memcpy(regs->fdata, data, len);
454 /* Drain FDATAn FIFO after a read transaction populates data */
455 static void drain_xfer_fifo(struct fast_spi_regs *regs, void *dest, uint len)
457 memcpy(dest, regs->fdata, len);
460 /* Fire up a transfer using the hardware sequencer */
461 static void start_hwseq_xfer(struct fast_spi_regs *regs, uint hsfsts_cycle,
462 uint offset, uint len)
464 /* Make sure all W1C status bits get cleared */
467 hsfsts = readl(®s->hsfsts_ctl);
468 hsfsts &= ~(HSFSTS_FCYCLE_MASK | HSFSTS_FDBC_MASK);
469 hsfsts |= HSFSTS_AEL | HSFSTS_FCERR | HSFSTS_FDONE;
471 /* Set up transaction parameters */
472 hsfsts |= hsfsts_cycle << HSFSTS_FCYCLE_SHIFT;
473 hsfsts |= ((len - 1) << HSFSTS_FDBC_SHIFT) & HSFSTS_FDBC_MASK;
474 hsfsts |= HSFSTS_FGO;
476 writel(offset, ®s->faddr);
477 writel(hsfsts, ®s->hsfsts_ctl);
480 static int wait_for_hwseq_xfer(struct fast_spi_regs *regs, uint offset)
485 start = get_timer(0);
487 hsfsts = readl(®s->hsfsts_ctl);
488 if (hsfsts & HSFSTS_FCERR) {
489 debug("SPI transaction error at offset %x HSFSTS = %08x\n",
493 if (hsfsts & HSFSTS_AEL)
496 if (hsfsts & HSFSTS_FDONE)
498 } while (get_timer(start) < SPIBAR_HWSEQ_XFER_TIMEOUT_MS);
500 debug("SPI transaction timeout at offset %x HSFSTS = %08x, timer %d\n",
501 offset, hsfsts, (uint)get_timer(start));
507 * exec_sync_hwseq_xfer() - Execute flash transfer by hardware sequencing
509 * This waits until complete or timeout
511 * @regs: SPI registers
512 * @hsfsts_cycle: Cycle type (enum hsfsts_cycle_t)
513 * @offset: Offset to access
514 * @len: Number of bytes to transfer (can be 0)
515 * @return 0 if OK, -EIO on flash-cycle error (FCERR), -EPERM on access error
516 * (AEL), -ETIMEDOUT on timeout
518 static int exec_sync_hwseq_xfer(struct fast_spi_regs *regs, uint hsfsts_cycle,
519 uint offset, uint len)
521 start_hwseq_xfer(regs, hsfsts_cycle, offset, len);
523 return wait_for_hwseq_xfer(regs, offset);
526 static int ich_spi_exec_op_hwseq(struct spi_slave *slave,
527 const struct spi_mem_op *op)
529 struct spi_flash *flash = dev_get_uclass_priv(slave->dev);
530 struct udevice *bus = dev_get_parent(slave->dev);
531 struct ich_spi_priv *priv = dev_get_priv(bus);
532 struct fast_spi_regs *regs = priv->base;
541 offset = op->addr.val;
542 len = op->data.nbytes;
544 switch (op->cmd.opcode) {
546 cycle = HSFSTS_CYCLE_RDID;
548 case SPINOR_OP_READ_FAST:
549 cycle = HSFSTS_CYCLE_READ;
552 cycle = HSFSTS_CYCLE_WRITE;
555 /* Nothing needs to be done */
558 cycle = HSFSTS_CYCLE_WR_STATUS;
561 cycle = HSFSTS_CYCLE_RD_STATUS;
564 return 0; /* ignore */
565 case SPINOR_OP_BE_4K:
566 cycle = HSFSTS_CYCLE_4K_ERASE;
567 ret = exec_sync_hwseq_xfer(regs, cycle, offset, 0);
570 debug("Unknown cycle %x\n", op->cmd.opcode);
574 out = op->data.dir == SPI_MEM_DATA_OUT;
575 buf = out ? (u8 *)op->data.buf.out : op->data.buf.in;
576 page_size = flash->page_size ? : 256;
579 uint xfer_len = get_xfer_len(offset, len, page_size);
582 fill_xfer_fifo(regs, buf, xfer_len);
584 ret = exec_sync_hwseq_xfer(regs, cycle, offset, xfer_len);
589 drain_xfer_fifo(regs, buf, xfer_len);
599 static int ich_spi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
601 struct udevice *bus = dev_get_parent(slave->dev);
602 struct ich_spi_platdata *plat = dev_get_platdata(bus);
605 bootstage_start(BOOTSTAGE_ID_ACCUM_SPI, "fast_spi");
607 ret = ich_spi_exec_op_hwseq(slave, op);
609 ret = ich_spi_exec_op_swseq(slave, op);
610 bootstage_accum(BOOTSTAGE_ID_ACCUM_SPI);
615 static int ich_get_mmap_bus(struct udevice *bus, ulong *map_basep,
616 uint *map_sizep, uint *offsetp)
620 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
621 struct pci_child_platdata *pplat = dev_get_parent_platdata(bus);
623 spi_bdf = pplat->devfn;
625 struct ich_spi_platdata *plat = dev_get_platdata(bus);
628 * We cannot rely on plat->bdf being set up yet since this method can
629 * be called before the device is probed. Use the of-platdata directly
632 spi_bdf = pci_ofplat_get_devfn(plat->dtplat.reg[0]);
635 return fast_spi_get_bios_mmap(spi_bdf, map_basep, map_sizep, offsetp);
638 static int ich_get_mmap(struct udevice *dev, ulong *map_basep, uint *map_sizep,
641 struct udevice *bus = dev_get_parent(dev);
643 return ich_get_mmap_bus(bus, map_basep, map_sizep, offsetp);
646 static int ich_spi_adjust_size(struct spi_slave *slave, struct spi_mem_op *op)
648 unsigned int page_offset;
649 int addr = op->addr.val;
650 unsigned int byte_count = op->data.nbytes;
652 if (hweight32(ICH_BOUNDARY) == 1) {
653 page_offset = addr & (ICH_BOUNDARY - 1);
657 page_offset = do_div(aux, ICH_BOUNDARY);
660 if (op->data.dir == SPI_MEM_DATA_IN) {
661 if (slave->max_read_size) {
662 op->data.nbytes = min(ICH_BOUNDARY - page_offset,
663 slave->max_read_size);
665 } else if (slave->max_write_size) {
666 op->data.nbytes = min(ICH_BOUNDARY - page_offset,
667 slave->max_write_size);
670 op->data.nbytes = min(op->data.nbytes, byte_count);
675 static int ich_protect_lockdown(struct udevice *dev)
677 struct ich_spi_platdata *plat = dev_get_platdata(dev);
678 struct ich_spi_priv *priv = dev_get_priv(dev);
681 /* Disable the BIOS write protect so write commands are allowed */
683 ret = pch_set_spi_protect(priv->pch, false);
684 if (ret == -ENOSYS) {
687 bios_cntl = ich_readb(priv, priv->bcr);
688 bios_cntl &= ~BIT(5); /* clear Enable InSMM_STS (EISS) */
689 bios_cntl |= 1; /* Write Protect Disable (WPD) */
690 ich_writeb(priv, bios_cntl, priv->bcr);
692 debug("%s: Failed to disable write-protect: err=%d\n",
697 /* Lock down SPI controller settings if required */
698 if (plat->lockdown) {
699 ich_spi_config_opcode(dev);
700 spi_lock_down(plat, priv->base);
706 static int ich_init_controller(struct udevice *dev,
707 struct ich_spi_platdata *plat,
708 struct ich_spi_priv *ctlr)
710 if (spl_phase() == PHASE_TPL) {
711 struct ich_spi_platdata *plat = dev_get_platdata(dev);
714 ret = fast_spi_early_init(plat->bdf, plat->mmio_base);
719 ctlr->base = (void *)plat->mmio_base;
720 if (plat->ich_version == ICHV_7) {
721 struct ich7_spi_regs *ich7_spi = ctlr->base;
723 ctlr->opmenu = offsetof(struct ich7_spi_regs, opmenu);
724 ctlr->menubytes = sizeof(ich7_spi->opmenu);
725 ctlr->optype = offsetof(struct ich7_spi_regs, optype);
726 ctlr->addr = offsetof(struct ich7_spi_regs, spia);
727 ctlr->data = offsetof(struct ich7_spi_regs, spid);
728 ctlr->databytes = sizeof(ich7_spi->spid);
729 ctlr->status = offsetof(struct ich7_spi_regs, spis);
730 ctlr->control = offsetof(struct ich7_spi_regs, spic);
731 ctlr->bbar = offsetof(struct ich7_spi_regs, bbar);
732 ctlr->preop = offsetof(struct ich7_spi_regs, preop);
733 } else if (plat->ich_version == ICHV_9) {
734 struct ich9_spi_regs *ich9_spi = ctlr->base;
736 ctlr->opmenu = offsetof(struct ich9_spi_regs, opmenu);
737 ctlr->menubytes = sizeof(ich9_spi->opmenu);
738 ctlr->optype = offsetof(struct ich9_spi_regs, optype);
739 ctlr->addr = offsetof(struct ich9_spi_regs, faddr);
740 ctlr->data = offsetof(struct ich9_spi_regs, fdata);
741 ctlr->databytes = sizeof(ich9_spi->fdata);
742 ctlr->status = offsetof(struct ich9_spi_regs, ssfs);
743 ctlr->control = offsetof(struct ich9_spi_regs, ssfc);
744 ctlr->speed = ctlr->control + 2;
745 ctlr->bbar = offsetof(struct ich9_spi_regs, bbar);
746 ctlr->preop = offsetof(struct ich9_spi_regs, preop);
747 ctlr->bcr = offsetof(struct ich9_spi_regs, bcr);
748 ctlr->pr = &ich9_spi->pr[0];
749 } else if (plat->ich_version == ICHV_APL) {
751 debug("ICH SPI: Unrecognised ICH version %d\n",
756 /* Work out the maximum speed we can support */
757 ctlr->max_speed = 20000000;
758 if (plat->ich_version == ICHV_9 && ich9_can_do_33mhz(dev))
759 ctlr->max_speed = 33000000;
760 debug("ICH SPI: Version ID %d detected at %lx, speed %ld\n",
761 plat->ich_version, plat->mmio_base, ctlr->max_speed);
763 ich_set_bbar(ctlr, 0);
768 static int ich_cache_bios_region(struct udevice *dev)
776 ret = ich_get_mmap_bus(dev, &map_base, &map_size, &offset);
780 /* Don't use WRBACK since we are not supposed to write to SPI flash */
781 base = SZ_4G - map_size;
782 mtrr_set_next_var(MTRR_TYPE_WRPROT, base, map_size);
783 log_debug("BIOS cache base=%lx, size=%x\n", base, (uint)map_size);
788 static int ich_spi_probe(struct udevice *dev)
790 struct ich_spi_platdata *plat = dev_get_platdata(dev);
791 struct ich_spi_priv *priv = dev_get_priv(dev);
794 ret = ich_init_controller(dev, plat, priv);
798 if (spl_phase() == PHASE_TPL) {
799 /* Cache the BIOS to speed things up */
800 ret = ich_cache_bios_region(dev);
804 ret = ich_protect_lockdown(dev);
808 priv->cur_speed = priv->max_speed;
813 static int ich_spi_remove(struct udevice *bus)
816 * Configure SPI controller so that the Linux MTD driver can fully
817 * access the SPI NOR chip
819 ich_spi_config_opcode(bus);
824 static int ich_spi_set_speed(struct udevice *bus, uint speed)
826 struct ich_spi_priv *priv = dev_get_priv(bus);
828 priv->cur_speed = speed;
833 static int ich_spi_set_mode(struct udevice *bus, uint mode)
835 debug("%s: mode=%d\n", __func__, mode);
840 static int ich_spi_child_pre_probe(struct udevice *dev)
842 struct udevice *bus = dev_get_parent(dev);
843 struct ich_spi_platdata *plat = dev_get_platdata(bus);
844 struct ich_spi_priv *priv = dev_get_priv(bus);
845 struct spi_slave *slave = dev_get_parent_priv(dev);
848 * Yes this controller can only write a small number of bytes at
849 * once! The limit is typically 64 bytes. For hardware sequencing a
850 * a loop is used to get around this.
853 slave->max_write_size = priv->databytes;
855 * ICH 7 SPI controller only supports array read command
856 * and byte program command for SST flash
858 if (plat->ich_version == ICHV_7)
859 slave->mode = SPI_RX_SLOW | SPI_TX_BYTE;
864 static int ich_spi_ofdata_to_platdata(struct udevice *dev)
866 struct ich_spi_platdata *plat = dev_get_platdata(dev);
868 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
869 struct ich_spi_priv *priv = dev_get_priv(dev);
871 /* Find a PCH if there is one */
872 uclass_first_device(UCLASS_PCH, &priv->pch);
874 priv->pch = dev_get_parent(dev);
876 plat->ich_version = dev_get_driver_data(dev);
877 plat->lockdown = dev_read_bool(dev, "intel,spi-lock-down");
878 if (plat->ich_version == ICHV_APL) {
879 plat->mmio_base = dm_pci_read_bar32(dev, 0);
881 /* SBASE is similar */
882 pch_get_spi_base(priv->pch, &plat->mmio_base);
885 * Use an int so that the property is present in of-platdata even
888 plat->hwseq = dev_read_u32_default(dev, "intel,hardware-seq", 0);
890 plat->ich_version = ICHV_APL;
891 plat->mmio_base = plat->dtplat.early_regs[0];
892 plat->bdf = pci_ofplat_get_devfn(plat->dtplat.reg[0]);
893 plat->hwseq = plat->dtplat.intel_hardware_seq;
895 debug("%s: mmio_base=%lx\n", __func__, plat->mmio_base);
900 static const struct spi_controller_mem_ops ich_controller_mem_ops = {
901 .adjust_op_size = ich_spi_adjust_size,
903 .exec_op = ich_spi_exec_op,
906 static const struct dm_spi_ops ich_spi_ops = {
907 /* xfer is not supported */
908 .set_speed = ich_spi_set_speed,
909 .set_mode = ich_spi_set_mode,
910 .mem_ops = &ich_controller_mem_ops,
911 .get_mmap = ich_get_mmap,
913 * cs_info is not needed, since we require all chip selects to be
914 * in the device tree explicitly
918 static const struct udevice_id ich_spi_ids[] = {
919 { .compatible = "intel,ich7-spi", ICHV_7 },
920 { .compatible = "intel,ich9-spi", ICHV_9 },
921 { .compatible = "intel,fast-spi", ICHV_APL },
925 U_BOOT_DRIVER(intel_fast_spi) = {
926 .name = "intel_fast_spi",
928 .of_match = ich_spi_ids,
930 .ofdata_to_platdata = ich_spi_ofdata_to_platdata,
931 .platdata_auto_alloc_size = sizeof(struct ich_spi_platdata),
932 .priv_auto_alloc_size = sizeof(struct ich_spi_priv),
933 .child_pre_probe = ich_spi_child_pre_probe,
934 .probe = ich_spi_probe,
935 .remove = ich_spi_remove,
936 .flags = DM_FLAG_OS_PREPARE,