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/delay.h>
29 #include <linux/sizes.h>
34 #define debug_trace(fmt, args...) debug(fmt, ##args)
36 #define debug_trace(x, args...)
39 struct ich_spi_platdata {
40 #if CONFIG_IS_ENABLED(OF_PLATDATA)
41 struct dtd_intel_fast_spi dtplat;
43 enum ich_version ich_version; /* Controller version, 7 or 9 */
44 bool lockdown; /* lock down controller settings? */
45 ulong mmio_base; /* Base of MMIO registers */
46 pci_dev_t bdf; /* PCI address used by of-platdata */
47 bool hwseq; /* Use hardware sequencing (not s/w) */
50 static u8 ich_readb(struct ich_spi_priv *priv, int reg)
52 u8 value = readb(priv->base + reg);
54 debug_trace("read %2.2x from %4.4x\n", value, reg);
59 static u16 ich_readw(struct ich_spi_priv *priv, int reg)
61 u16 value = readw(priv->base + reg);
63 debug_trace("read %4.4x from %4.4x\n", value, reg);
68 static u32 ich_readl(struct ich_spi_priv *priv, int reg)
70 u32 value = readl(priv->base + reg);
72 debug_trace("read %8.8x from %4.4x\n", value, reg);
77 static void ich_writeb(struct ich_spi_priv *priv, u8 value, int reg)
79 writeb(value, priv->base + reg);
80 debug_trace("wrote %2.2x to %4.4x\n", value, reg);
83 static void ich_writew(struct ich_spi_priv *priv, u16 value, int reg)
85 writew(value, priv->base + reg);
86 debug_trace("wrote %4.4x to %4.4x\n", value, reg);
89 static void ich_writel(struct ich_spi_priv *priv, u32 value, int reg)
91 writel(value, priv->base + reg);
92 debug_trace("wrote %8.8x to %4.4x\n", value, reg);
95 static void write_reg(struct ich_spi_priv *priv, const void *value,
96 int dest_reg, uint32_t size)
98 memcpy_toio(priv->base + dest_reg, value, size);
101 static void read_reg(struct ich_spi_priv *priv, int src_reg, void *value,
104 memcpy_fromio(value, priv->base + src_reg, size);
107 static void ich_set_bbar(struct ich_spi_priv *ctlr, uint32_t minaddr)
109 const uint32_t bbar_mask = 0x00ffff00;
110 uint32_t ichspi_bbar;
113 minaddr &= bbar_mask;
114 ichspi_bbar = ich_readl(ctlr, ctlr->bbar) & ~bbar_mask;
115 ichspi_bbar |= minaddr;
116 ich_writel(ctlr, ichspi_bbar, ctlr->bbar);
120 /* @return 1 if the SPI flash supports the 33MHz speed */
121 static bool ich9_can_do_33mhz(struct udevice *dev)
123 struct ich_spi_priv *priv = dev_get_priv(dev);
126 if (!CONFIG_IS_ENABLED(PCI))
128 /* Observe SPI Descriptor Component Section 0 */
129 dm_pci_write_config32(priv->pch, 0xb0, 0x1000);
131 /* Extract the Write/Erase SPI Frequency from descriptor */
132 dm_pci_read_config32(priv->pch, 0xb4, &fdod);
134 /* Bits 23:21 have the fast read clock frequency, 0=20MHz, 1=33MHz */
135 speed = (fdod >> 21) & 7;
140 static void spi_lock_down(struct ich_spi_platdata *plat, void *sbase)
142 if (plat->ich_version == ICHV_7) {
143 struct ich7_spi_regs *ich7_spi = sbase;
145 setbits_le16(&ich7_spi->spis, SPIS_LOCK);
146 } else if (plat->ich_version == ICHV_9) {
147 struct ich9_spi_regs *ich9_spi = sbase;
149 setbits_le16(&ich9_spi->hsfs, HSFS_FLOCKDN);
153 static bool spi_lock_status(struct ich_spi_platdata *plat, void *sbase)
157 if (plat->ich_version == ICHV_7) {
158 struct ich7_spi_regs *ich7_spi = sbase;
160 lock = readw(&ich7_spi->spis) & SPIS_LOCK;
161 } else if (plat->ich_version == ICHV_9) {
162 struct ich9_spi_regs *ich9_spi = sbase;
164 lock = readw(&ich9_spi->hsfs) & HSFS_FLOCKDN;
170 static int spi_setup_opcode(struct ich_spi_priv *ctlr, struct spi_trans *trans,
174 uint8_t opmenu[ctlr->menubytes];
177 /* The lock is off, so just use index 0. */
178 ich_writeb(ctlr, trans->opcode, ctlr->opmenu);
179 optypes = ich_readw(ctlr, ctlr->optype);
180 optypes = (optypes & 0xfffc) | (trans->type & 0x3);
181 ich_writew(ctlr, optypes, ctlr->optype);
184 /* The lock is on. See if what we need is on the menu. */
186 uint16_t opcode_index;
188 /* Write Enable is handled as atomic prefix */
189 if (trans->opcode == SPI_OPCODE_WREN)
192 read_reg(ctlr, ctlr->opmenu, opmenu, sizeof(opmenu));
193 for (opcode_index = 0; opcode_index < ctlr->menubytes;
195 if (opmenu[opcode_index] == trans->opcode)
199 if (opcode_index == ctlr->menubytes) {
200 debug("ICH SPI: Opcode %x not found\n", trans->opcode);
204 optypes = ich_readw(ctlr, ctlr->optype);
205 optype = (optypes >> (opcode_index * 2)) & 0x3;
207 if (optype != trans->type) {
208 debug("ICH SPI: Transaction doesn't fit type %d\n",
217 * Wait for up to 6s til status register bit(s) turn 1 (in case wait_til_set
218 * below is true) or 0. In case the wait was for the bit(s) to set - write
219 * those bits back, which would cause resetting them.
221 * Return the last read status value on success or -1 on failure.
223 static int ich_status_poll(struct ich_spi_priv *ctlr, u16 bitmask,
226 int timeout = 600000; /* This will result in 6s */
230 status = ich_readw(ctlr, ctlr->status);
231 if (wait_til_set ^ ((status & bitmask) == 0)) {
233 ich_writew(ctlr, status & bitmask,
240 debug("ICH SPI: SCIP timeout, read %x, expected %x, wts %x %x\n",
241 status, bitmask, wait_til_set, status & bitmask);
246 static void ich_spi_config_opcode(struct udevice *dev)
248 struct ich_spi_priv *ctlr = dev_get_priv(dev);
251 * PREOP, OPTYPE, OPMENU1/OPMENU2 registers can be locked down
252 * to prevent accidental or intentional writes. Before they get
253 * locked down, these registers should be initialized properly.
255 ich_writew(ctlr, SPI_OPPREFIX, ctlr->preop);
256 ich_writew(ctlr, SPI_OPTYPE, ctlr->optype);
257 ich_writel(ctlr, SPI_OPMENU_LOWER, ctlr->opmenu);
258 ich_writel(ctlr, SPI_OPMENU_UPPER, ctlr->opmenu + sizeof(u32));
261 static int ich_spi_exec_op_swseq(struct spi_slave *slave,
262 const struct spi_mem_op *op)
264 struct udevice *bus = dev_get_parent(slave->dev);
265 struct ich_spi_platdata *plat = dev_get_platdata(bus);
266 struct ich_spi_priv *ctlr = dev_get_priv(bus);
268 int16_t opcode_index;
271 struct spi_trans *trans = &ctlr->trans;
272 bool lock = spi_lock_status(plat, ctlr->base);
279 if (op->data.nbytes) {
280 if (op->data.dir == SPI_MEM_DATA_IN) {
281 trans->in = op->data.buf.in;
282 trans->bytesin = op->data.nbytes;
284 trans->out = op->data.buf.out;
285 trans->bytesout = op->data.nbytes;
289 if (trans->opcode != op->cmd.opcode)
290 trans->opcode = op->cmd.opcode;
292 if (lock && trans->opcode == SPI_OPCODE_WRDIS)
295 if (trans->opcode == SPI_OPCODE_WREN) {
297 * Treat Write Enable as Atomic Pre-Op if possible
298 * in order to prevent the Management Engine from
299 * issuing a transaction between WREN and DATA.
302 ich_writew(ctlr, trans->opcode, ctlr->preop);
306 ret = ich_status_poll(ctlr, SPIS_SCIP, 0);
310 if (plat->ich_version == ICHV_7)
311 ich_writew(ctlr, SPIS_CDS | SPIS_FCERR, ctlr->status);
313 ich_writeb(ctlr, SPIS_CDS | SPIS_FCERR, ctlr->status);
315 /* Try to guess spi transaction type */
316 if (op->data.dir == SPI_MEM_DATA_OUT) {
318 trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS;
320 trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS;
323 trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS;
325 trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS;
327 /* Special erase case handling */
328 if (op->addr.nbytes && !op->data.buswidth)
329 trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS;
331 opcode_index = spi_setup_opcode(ctlr, trans, lock);
332 if (opcode_index < 0)
335 if (op->addr.nbytes) {
336 trans->offset = op->addr.val;
340 if (ctlr->speed && ctlr->max_speed >= 33000000) {
343 byte = ich_readb(ctlr, ctlr->speed);
344 if (ctlr->cur_speed >= 33000000)
345 byte |= SSFC_SCF_33MHZ;
347 byte &= ~SSFC_SCF_33MHZ;
348 ich_writeb(ctlr, byte, ctlr->speed);
351 /* Preset control fields */
352 control = SPIC_SCGO | ((opcode_index & 0x07) << 4);
354 /* Issue atomic preop cycle if needed */
355 if (ich_readw(ctlr, ctlr->preop))
358 if (!trans->bytesout && !trans->bytesin) {
359 /* SPI addresses are 24 bit only */
361 ich_writel(ctlr, trans->offset & 0x00FFFFFF,
365 * This is a 'no data' command (like Write Enable), its
366 * bitesout size was 1, decremented to zero while executing
367 * spi_setup_opcode() above. Tell the chip to send the
370 ich_writew(ctlr, control, ctlr->control);
372 /* wait for the result */
373 status = ich_status_poll(ctlr, SPIS_CDS | SPIS_FCERR, 1);
377 if (status & SPIS_FCERR) {
378 debug("ICH SPI: Command transaction error\n");
385 while (trans->bytesout || trans->bytesin) {
386 uint32_t data_length;
388 /* SPI addresses are 24 bit only */
389 ich_writel(ctlr, trans->offset & 0x00FFFFFF, ctlr->addr);
392 data_length = min(trans->bytesout, ctlr->databytes);
394 data_length = min(trans->bytesin, ctlr->databytes);
396 /* Program data into FDATA0 to N */
397 if (trans->bytesout) {
398 write_reg(ctlr, trans->out, ctlr->data, data_length);
399 trans->bytesout -= data_length;
402 /* Add proper control fields' values */
403 control &= ~((ctlr->databytes - 1) << 8);
405 control |= (data_length - 1) << 8;
408 ich_writew(ctlr, control, ctlr->control);
410 /* Wait for Cycle Done Status or Flash Cycle Error */
411 status = ich_status_poll(ctlr, SPIS_CDS | SPIS_FCERR, 1);
415 if (status & SPIS_FCERR) {
416 debug("ICH SPI: Data transaction error %x\n", status);
420 if (trans->bytesin) {
421 read_reg(ctlr, ctlr->data, trans->in, data_length);
422 trans->bytesin -= data_length;
426 /* Clear atomic preop now that xfer is done */
428 ich_writew(ctlr, 0, ctlr->preop);
434 * Ensure read/write xfer len is not greater than SPIBAR_FDATA_FIFO_SIZE and
435 * that the operation does not cross page boundary.
437 static uint get_xfer_len(u32 offset, int len, int page_size)
439 uint xfer_len = min(len, SPIBAR_FDATA_FIFO_SIZE);
440 uint bytes_left = ALIGN(offset, page_size) - offset;
443 xfer_len = min(xfer_len, bytes_left);
448 /* Fill FDATAn FIFO in preparation for a write transaction */
449 static void fill_xfer_fifo(struct fast_spi_regs *regs, const void *data,
452 memcpy(regs->fdata, data, len);
455 /* Drain FDATAn FIFO after a read transaction populates data */
456 static void drain_xfer_fifo(struct fast_spi_regs *regs, void *dest, uint len)
458 memcpy(dest, regs->fdata, len);
461 /* Fire up a transfer using the hardware sequencer */
462 static void start_hwseq_xfer(struct fast_spi_regs *regs, uint hsfsts_cycle,
463 uint offset, uint len)
465 /* Make sure all W1C status bits get cleared */
468 hsfsts = readl(®s->hsfsts_ctl);
469 hsfsts &= ~(HSFSTS_FCYCLE_MASK | HSFSTS_FDBC_MASK);
470 hsfsts |= HSFSTS_AEL | HSFSTS_FCERR | HSFSTS_FDONE;
472 /* Set up transaction parameters */
473 hsfsts |= hsfsts_cycle << HSFSTS_FCYCLE_SHIFT;
474 hsfsts |= ((len - 1) << HSFSTS_FDBC_SHIFT) & HSFSTS_FDBC_MASK;
475 hsfsts |= HSFSTS_FGO;
477 writel(offset, ®s->faddr);
478 writel(hsfsts, ®s->hsfsts_ctl);
481 static int wait_for_hwseq_xfer(struct fast_spi_regs *regs, uint offset)
486 start = get_timer(0);
488 hsfsts = readl(®s->hsfsts_ctl);
489 if (hsfsts & HSFSTS_FCERR) {
490 debug("SPI transaction error at offset %x HSFSTS = %08x\n",
494 if (hsfsts & HSFSTS_AEL)
497 if (hsfsts & HSFSTS_FDONE)
499 } while (get_timer(start) < SPIBAR_HWSEQ_XFER_TIMEOUT_MS);
501 debug("SPI transaction timeout at offset %x HSFSTS = %08x, timer %d\n",
502 offset, hsfsts, (uint)get_timer(start));
508 * exec_sync_hwseq_xfer() - Execute flash transfer by hardware sequencing
510 * This waits until complete or timeout
512 * @regs: SPI registers
513 * @hsfsts_cycle: Cycle type (enum hsfsts_cycle_t)
514 * @offset: Offset to access
515 * @len: Number of bytes to transfer (can be 0)
516 * @return 0 if OK, -EIO on flash-cycle error (FCERR), -EPERM on access error
517 * (AEL), -ETIMEDOUT on timeout
519 static int exec_sync_hwseq_xfer(struct fast_spi_regs *regs, uint hsfsts_cycle,
520 uint offset, uint len)
522 start_hwseq_xfer(regs, hsfsts_cycle, offset, len);
524 return wait_for_hwseq_xfer(regs, offset);
527 static int ich_spi_exec_op_hwseq(struct spi_slave *slave,
528 const struct spi_mem_op *op)
530 struct spi_flash *flash = dev_get_uclass_priv(slave->dev);
531 struct udevice *bus = dev_get_parent(slave->dev);
532 struct ich_spi_priv *priv = dev_get_priv(bus);
533 struct fast_spi_regs *regs = priv->base;
542 offset = op->addr.val;
543 len = op->data.nbytes;
545 switch (op->cmd.opcode) {
547 cycle = HSFSTS_CYCLE_RDID;
549 case SPINOR_OP_READ_FAST:
550 cycle = HSFSTS_CYCLE_READ;
553 cycle = HSFSTS_CYCLE_WRITE;
556 /* Nothing needs to be done */
559 cycle = HSFSTS_CYCLE_WR_STATUS;
562 cycle = HSFSTS_CYCLE_RD_STATUS;
565 return 0; /* ignore */
566 case SPINOR_OP_BE_4K:
567 cycle = HSFSTS_CYCLE_4K_ERASE;
568 ret = exec_sync_hwseq_xfer(regs, cycle, offset, 0);
571 debug("Unknown cycle %x\n", op->cmd.opcode);
575 out = op->data.dir == SPI_MEM_DATA_OUT;
576 buf = out ? (u8 *)op->data.buf.out : op->data.buf.in;
577 page_size = flash->page_size ? : 256;
580 uint xfer_len = get_xfer_len(offset, len, page_size);
583 fill_xfer_fifo(regs, buf, xfer_len);
585 ret = exec_sync_hwseq_xfer(regs, cycle, offset, xfer_len);
590 drain_xfer_fifo(regs, buf, xfer_len);
600 static int ich_spi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
602 struct udevice *bus = dev_get_parent(slave->dev);
603 struct ich_spi_platdata *plat = dev_get_platdata(bus);
606 bootstage_start(BOOTSTAGE_ID_ACCUM_SPI, "fast_spi");
608 ret = ich_spi_exec_op_hwseq(slave, op);
610 ret = ich_spi_exec_op_swseq(slave, op);
611 bootstage_accum(BOOTSTAGE_ID_ACCUM_SPI);
616 static int ich_get_mmap_bus(struct udevice *bus, ulong *map_basep,
617 uint *map_sizep, uint *offsetp)
621 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
622 struct pci_child_platdata *pplat = dev_get_parent_platdata(bus);
624 spi_bdf = pplat->devfn;
626 struct ich_spi_platdata *plat = dev_get_platdata(bus);
629 * We cannot rely on plat->bdf being set up yet since this method can
630 * be called before the device is probed. Use the of-platdata directly
633 spi_bdf = pci_ofplat_get_devfn(plat->dtplat.reg[0]);
636 return fast_spi_get_bios_mmap(spi_bdf, map_basep, map_sizep, offsetp);
639 static int ich_get_mmap(struct udevice *dev, ulong *map_basep, uint *map_sizep,
642 struct udevice *bus = dev_get_parent(dev);
644 return ich_get_mmap_bus(bus, map_basep, map_sizep, offsetp);
647 static int ich_spi_adjust_size(struct spi_slave *slave, struct spi_mem_op *op)
649 unsigned int page_offset;
650 int addr = op->addr.val;
651 unsigned int byte_count = op->data.nbytes;
653 if (hweight32(ICH_BOUNDARY) == 1) {
654 page_offset = addr & (ICH_BOUNDARY - 1);
658 page_offset = do_div(aux, ICH_BOUNDARY);
661 if (op->data.dir == SPI_MEM_DATA_IN) {
662 if (slave->max_read_size) {
663 op->data.nbytes = min(ICH_BOUNDARY - page_offset,
664 slave->max_read_size);
666 } else if (slave->max_write_size) {
667 op->data.nbytes = min(ICH_BOUNDARY - page_offset,
668 slave->max_write_size);
671 op->data.nbytes = min(op->data.nbytes, byte_count);
676 static int ich_protect_lockdown(struct udevice *dev)
678 struct ich_spi_platdata *plat = dev_get_platdata(dev);
679 struct ich_spi_priv *priv = dev_get_priv(dev);
682 /* Disable the BIOS write protect so write commands are allowed */
684 ret = pch_set_spi_protect(priv->pch, false);
685 if (ret == -ENOSYS) {
688 bios_cntl = ich_readb(priv, priv->bcr);
689 bios_cntl &= ~BIT(5); /* clear Enable InSMM_STS (EISS) */
690 bios_cntl |= 1; /* Write Protect Disable (WPD) */
691 ich_writeb(priv, bios_cntl, priv->bcr);
693 debug("%s: Failed to disable write-protect: err=%d\n",
698 /* Lock down SPI controller settings if required */
699 if (plat->lockdown) {
700 ich_spi_config_opcode(dev);
701 spi_lock_down(plat, priv->base);
707 static int ich_init_controller(struct udevice *dev,
708 struct ich_spi_platdata *plat,
709 struct ich_spi_priv *ctlr)
711 if (spl_phase() == PHASE_TPL) {
712 struct ich_spi_platdata *plat = dev_get_platdata(dev);
715 ret = fast_spi_early_init(plat->bdf, plat->mmio_base);
720 ctlr->base = (void *)plat->mmio_base;
721 if (plat->ich_version == ICHV_7) {
722 struct ich7_spi_regs *ich7_spi = ctlr->base;
724 ctlr->opmenu = offsetof(struct ich7_spi_regs, opmenu);
725 ctlr->menubytes = sizeof(ich7_spi->opmenu);
726 ctlr->optype = offsetof(struct ich7_spi_regs, optype);
727 ctlr->addr = offsetof(struct ich7_spi_regs, spia);
728 ctlr->data = offsetof(struct ich7_spi_regs, spid);
729 ctlr->databytes = sizeof(ich7_spi->spid);
730 ctlr->status = offsetof(struct ich7_spi_regs, spis);
731 ctlr->control = offsetof(struct ich7_spi_regs, spic);
732 ctlr->bbar = offsetof(struct ich7_spi_regs, bbar);
733 ctlr->preop = offsetof(struct ich7_spi_regs, preop);
734 } else if (plat->ich_version == ICHV_9) {
735 struct ich9_spi_regs *ich9_spi = ctlr->base;
737 ctlr->opmenu = offsetof(struct ich9_spi_regs, opmenu);
738 ctlr->menubytes = sizeof(ich9_spi->opmenu);
739 ctlr->optype = offsetof(struct ich9_spi_regs, optype);
740 ctlr->addr = offsetof(struct ich9_spi_regs, faddr);
741 ctlr->data = offsetof(struct ich9_spi_regs, fdata);
742 ctlr->databytes = sizeof(ich9_spi->fdata);
743 ctlr->status = offsetof(struct ich9_spi_regs, ssfs);
744 ctlr->control = offsetof(struct ich9_spi_regs, ssfc);
745 ctlr->speed = ctlr->control + 2;
746 ctlr->bbar = offsetof(struct ich9_spi_regs, bbar);
747 ctlr->preop = offsetof(struct ich9_spi_regs, preop);
748 ctlr->bcr = offsetof(struct ich9_spi_regs, bcr);
749 ctlr->pr = &ich9_spi->pr[0];
750 } else if (plat->ich_version == ICHV_APL) {
752 debug("ICH SPI: Unrecognised ICH version %d\n",
757 /* Work out the maximum speed we can support */
758 ctlr->max_speed = 20000000;
759 if (plat->ich_version == ICHV_9 && ich9_can_do_33mhz(dev))
760 ctlr->max_speed = 33000000;
761 debug("ICH SPI: Version ID %d detected at %lx, speed %ld\n",
762 plat->ich_version, plat->mmio_base, ctlr->max_speed);
764 ich_set_bbar(ctlr, 0);
769 static int ich_cache_bios_region(struct udevice *dev)
777 ret = ich_get_mmap_bus(dev, &map_base, &map_size, &offset);
781 /* Don't use WRBACK since we are not supposed to write to SPI flash */
782 base = SZ_4G - map_size;
783 mtrr_set_next_var(MTRR_TYPE_WRPROT, base, map_size);
784 log_debug("BIOS cache base=%lx, size=%x\n", base, (uint)map_size);
789 static int ich_spi_probe(struct udevice *dev)
791 struct ich_spi_platdata *plat = dev_get_platdata(dev);
792 struct ich_spi_priv *priv = dev_get_priv(dev);
795 ret = ich_init_controller(dev, plat, priv);
799 if (spl_phase() == PHASE_TPL) {
800 /* Cache the BIOS to speed things up */
801 ret = ich_cache_bios_region(dev);
805 ret = ich_protect_lockdown(dev);
809 priv->cur_speed = priv->max_speed;
814 static int ich_spi_remove(struct udevice *bus)
817 * Configure SPI controller so that the Linux MTD driver can fully
818 * access the SPI NOR chip
820 ich_spi_config_opcode(bus);
825 static int ich_spi_set_speed(struct udevice *bus, uint speed)
827 struct ich_spi_priv *priv = dev_get_priv(bus);
829 priv->cur_speed = speed;
834 static int ich_spi_set_mode(struct udevice *bus, uint mode)
836 debug("%s: mode=%d\n", __func__, mode);
841 static int ich_spi_child_pre_probe(struct udevice *dev)
843 struct udevice *bus = dev_get_parent(dev);
844 struct ich_spi_platdata *plat = dev_get_platdata(bus);
845 struct ich_spi_priv *priv = dev_get_priv(bus);
846 struct spi_slave *slave = dev_get_parent_priv(dev);
849 * Yes this controller can only write a small number of bytes at
850 * once! The limit is typically 64 bytes. For hardware sequencing a
851 * a loop is used to get around this.
854 slave->max_write_size = priv->databytes;
856 * ICH 7 SPI controller only supports array read command
857 * and byte program command for SST flash
859 if (plat->ich_version == ICHV_7)
860 slave->mode = SPI_RX_SLOW | SPI_TX_BYTE;
865 static int ich_spi_ofdata_to_platdata(struct udevice *dev)
867 struct ich_spi_platdata *plat = dev_get_platdata(dev);
869 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
870 struct ich_spi_priv *priv = dev_get_priv(dev);
872 /* Find a PCH if there is one */
873 uclass_first_device(UCLASS_PCH, &priv->pch);
875 priv->pch = dev_get_parent(dev);
877 plat->ich_version = dev_get_driver_data(dev);
878 plat->lockdown = dev_read_bool(dev, "intel,spi-lock-down");
879 if (plat->ich_version == ICHV_APL) {
880 plat->mmio_base = dm_pci_read_bar32(dev, 0);
882 /* SBASE is similar */
883 pch_get_spi_base(priv->pch, &plat->mmio_base);
886 * Use an int so that the property is present in of-platdata even
889 plat->hwseq = dev_read_u32_default(dev, "intel,hardware-seq", 0);
891 plat->ich_version = ICHV_APL;
892 plat->mmio_base = plat->dtplat.early_regs[0];
893 plat->bdf = pci_ofplat_get_devfn(plat->dtplat.reg[0]);
894 plat->hwseq = plat->dtplat.intel_hardware_seq;
896 debug("%s: mmio_base=%lx\n", __func__, plat->mmio_base);
901 static const struct spi_controller_mem_ops ich_controller_mem_ops = {
902 .adjust_op_size = ich_spi_adjust_size,
904 .exec_op = ich_spi_exec_op,
907 static const struct dm_spi_ops ich_spi_ops = {
908 /* xfer is not supported */
909 .set_speed = ich_spi_set_speed,
910 .set_mode = ich_spi_set_mode,
911 .mem_ops = &ich_controller_mem_ops,
912 .get_mmap = ich_get_mmap,
914 * cs_info is not needed, since we require all chip selects to be
915 * in the device tree explicitly
919 static const struct udevice_id ich_spi_ids[] = {
920 { .compatible = "intel,ich7-spi", ICHV_7 },
921 { .compatible = "intel,ich9-spi", ICHV_9 },
922 { .compatible = "intel,fast-spi", ICHV_APL },
926 U_BOOT_DRIVER(intel_fast_spi) = {
927 .name = "intel_fast_spi",
929 .of_match = ich_spi_ids,
931 .ofdata_to_platdata = ich_spi_ofdata_to_platdata,
932 .platdata_auto_alloc_size = sizeof(struct ich_spi_platdata),
933 .priv_auto_alloc_size = sizeof(struct ich_spi_priv),
934 .child_pre_probe = ich_spi_child_pre_probe,
935 .probe = ich_spi_probe,
936 .remove = ich_spi_remove,
937 .flags = DM_FLAG_OS_PREPARE,