1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author: Leilk Liu <leilk.liu@mediatek.com>
8 #include <linux/device.h>
10 #include <linux/interrupt.h>
12 #include <linux/ioport.h>
13 #include <linux/module.h>
15 #include <linux/of_gpio.h>
16 #include <linux/platform_device.h>
17 #include <linux/platform_data/spi-mt65xx.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/spi/spi.h>
20 #include <linux/dma-mapping.h>
22 #define SPI_CFG0_REG 0x0000
23 #define SPI_CFG1_REG 0x0004
24 #define SPI_TX_SRC_REG 0x0008
25 #define SPI_RX_DST_REG 0x000c
26 #define SPI_TX_DATA_REG 0x0010
27 #define SPI_RX_DATA_REG 0x0014
28 #define SPI_CMD_REG 0x0018
29 #define SPI_STATUS0_REG 0x001c
30 #define SPI_PAD_SEL_REG 0x0024
31 #define SPI_CFG2_REG 0x0028
32 #define SPI_TX_SRC_REG_64 0x002c
33 #define SPI_RX_DST_REG_64 0x0030
35 #define SPI_CFG0_SCK_HIGH_OFFSET 0
36 #define SPI_CFG0_SCK_LOW_OFFSET 8
37 #define SPI_CFG0_CS_HOLD_OFFSET 16
38 #define SPI_CFG0_CS_SETUP_OFFSET 24
39 #define SPI_ADJUST_CFG0_CS_HOLD_OFFSET 0
40 #define SPI_ADJUST_CFG0_CS_SETUP_OFFSET 16
42 #define SPI_CFG1_CS_IDLE_OFFSET 0
43 #define SPI_CFG1_PACKET_LOOP_OFFSET 8
44 #define SPI_CFG1_PACKET_LENGTH_OFFSET 16
45 #define SPI_CFG1_GET_TICK_DLY_OFFSET 30
47 #define SPI_CFG1_CS_IDLE_MASK 0xff
48 #define SPI_CFG1_PACKET_LOOP_MASK 0xff00
49 #define SPI_CFG1_PACKET_LENGTH_MASK 0x3ff0000
50 #define SPI_CFG2_SCK_HIGH_OFFSET 0
51 #define SPI_CFG2_SCK_LOW_OFFSET 16
53 #define SPI_CMD_ACT BIT(0)
54 #define SPI_CMD_RESUME BIT(1)
55 #define SPI_CMD_RST BIT(2)
56 #define SPI_CMD_PAUSE_EN BIT(4)
57 #define SPI_CMD_DEASSERT BIT(5)
58 #define SPI_CMD_SAMPLE_SEL BIT(6)
59 #define SPI_CMD_CS_POL BIT(7)
60 #define SPI_CMD_CPHA BIT(8)
61 #define SPI_CMD_CPOL BIT(9)
62 #define SPI_CMD_RX_DMA BIT(10)
63 #define SPI_CMD_TX_DMA BIT(11)
64 #define SPI_CMD_TXMSBF BIT(12)
65 #define SPI_CMD_RXMSBF BIT(13)
66 #define SPI_CMD_RX_ENDIAN BIT(14)
67 #define SPI_CMD_TX_ENDIAN BIT(15)
68 #define SPI_CMD_FINISH_IE BIT(16)
69 #define SPI_CMD_PAUSE_IE BIT(17)
71 #define MT8173_SPI_MAX_PAD_SEL 3
73 #define MTK_SPI_PAUSE_INT_STATUS 0x2
75 #define MTK_SPI_IDLE 0
76 #define MTK_SPI_PAUSED 1
78 #define MTK_SPI_MAX_FIFO_SIZE 32U
79 #define MTK_SPI_PACKET_SIZE 1024
80 #define MTK_SPI_32BITS_MASK (0xffffffff)
82 #define DMA_ADDR_EXT_BITS (36)
83 #define DMA_ADDR_DEF_BITS (32)
85 struct mtk_spi_compatible {
87 /* Must explicitly send dummy Tx bytes to do Rx only transfer */
89 /* some IC design adjust cfg register to enhance time accuracy */
91 /* some IC support DMA addr extension */
100 struct clk *parent_clk, *sel_clk, *spi_clk;
101 struct spi_transfer *cur_transfer;
104 struct scatterlist *tx_sgl, *rx_sgl;
105 u32 tx_sgl_len, rx_sgl_len;
106 const struct mtk_spi_compatible *dev_comp;
109 static const struct mtk_spi_compatible mtk_common_compat;
111 static const struct mtk_spi_compatible mt2712_compat = {
115 static const struct mtk_spi_compatible mt6765_compat = {
116 .need_pad_sel = true,
118 .enhance_timing = true,
122 static const struct mtk_spi_compatible mt7622_compat = {
124 .enhance_timing = true,
127 static const struct mtk_spi_compatible mt8173_compat = {
128 .need_pad_sel = true,
132 static const struct mtk_spi_compatible mt8183_compat = {
133 .need_pad_sel = true,
135 .enhance_timing = true,
139 * A piece of default chip info unless the platform
142 static const struct mtk_chip_config mtk_default_chip_info = {
146 static const struct of_device_id mtk_spi_of_match[] = {
147 { .compatible = "mediatek,mt2701-spi",
148 .data = (void *)&mtk_common_compat,
150 { .compatible = "mediatek,mt2712-spi",
151 .data = (void *)&mt2712_compat,
153 { .compatible = "mediatek,mt6589-spi",
154 .data = (void *)&mtk_common_compat,
156 { .compatible = "mediatek,mt6765-spi",
157 .data = (void *)&mt6765_compat,
159 { .compatible = "mediatek,mt7622-spi",
160 .data = (void *)&mt7622_compat,
162 { .compatible = "mediatek,mt7629-spi",
163 .data = (void *)&mt7622_compat,
165 { .compatible = "mediatek,mt8135-spi",
166 .data = (void *)&mtk_common_compat,
168 { .compatible = "mediatek,mt8173-spi",
169 .data = (void *)&mt8173_compat,
171 { .compatible = "mediatek,mt8183-spi",
172 .data = (void *)&mt8183_compat,
176 MODULE_DEVICE_TABLE(of, mtk_spi_of_match);
178 static void mtk_spi_reset(struct mtk_spi *mdata)
182 /* set the software reset bit in SPI_CMD_REG. */
183 reg_val = readl(mdata->base + SPI_CMD_REG);
184 reg_val |= SPI_CMD_RST;
185 writel(reg_val, mdata->base + SPI_CMD_REG);
187 reg_val = readl(mdata->base + SPI_CMD_REG);
188 reg_val &= ~SPI_CMD_RST;
189 writel(reg_val, mdata->base + SPI_CMD_REG);
192 static int mtk_spi_prepare_message(struct spi_master *master,
193 struct spi_message *msg)
197 struct spi_device *spi = msg->spi;
198 struct mtk_chip_config *chip_config = spi->controller_data;
199 struct mtk_spi *mdata = spi_master_get_devdata(master);
201 cpha = spi->mode & SPI_CPHA ? 1 : 0;
202 cpol = spi->mode & SPI_CPOL ? 1 : 0;
204 reg_val = readl(mdata->base + SPI_CMD_REG);
206 reg_val |= SPI_CMD_CPHA;
208 reg_val &= ~SPI_CMD_CPHA;
210 reg_val |= SPI_CMD_CPOL;
212 reg_val &= ~SPI_CMD_CPOL;
214 /* set the mlsbx and mlsbtx */
215 if (spi->mode & SPI_LSB_FIRST) {
216 reg_val &= ~SPI_CMD_TXMSBF;
217 reg_val &= ~SPI_CMD_RXMSBF;
219 reg_val |= SPI_CMD_TXMSBF;
220 reg_val |= SPI_CMD_RXMSBF;
223 /* set the tx/rx endian */
224 #ifdef __LITTLE_ENDIAN
225 reg_val &= ~SPI_CMD_TX_ENDIAN;
226 reg_val &= ~SPI_CMD_RX_ENDIAN;
228 reg_val |= SPI_CMD_TX_ENDIAN;
229 reg_val |= SPI_CMD_RX_ENDIAN;
232 if (mdata->dev_comp->enhance_timing) {
233 /* set CS polarity */
234 if (spi->mode & SPI_CS_HIGH)
235 reg_val |= SPI_CMD_CS_POL;
237 reg_val &= ~SPI_CMD_CS_POL;
239 if (chip_config->sample_sel)
240 reg_val |= SPI_CMD_SAMPLE_SEL;
242 reg_val &= ~SPI_CMD_SAMPLE_SEL;
245 /* set finish and pause interrupt always enable */
246 reg_val |= SPI_CMD_FINISH_IE | SPI_CMD_PAUSE_IE;
248 /* disable dma mode */
249 reg_val &= ~(SPI_CMD_TX_DMA | SPI_CMD_RX_DMA);
251 /* disable deassert mode */
252 reg_val &= ~SPI_CMD_DEASSERT;
254 writel(reg_val, mdata->base + SPI_CMD_REG);
257 if (mdata->dev_comp->need_pad_sel)
258 writel(mdata->pad_sel[spi->chip_select],
259 mdata->base + SPI_PAD_SEL_REG);
264 static void mtk_spi_set_cs(struct spi_device *spi, bool enable)
267 struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
269 if (spi->mode & SPI_CS_HIGH)
272 reg_val = readl(mdata->base + SPI_CMD_REG);
274 reg_val |= SPI_CMD_PAUSE_EN;
275 writel(reg_val, mdata->base + SPI_CMD_REG);
277 reg_val &= ~SPI_CMD_PAUSE_EN;
278 writel(reg_val, mdata->base + SPI_CMD_REG);
279 mdata->state = MTK_SPI_IDLE;
280 mtk_spi_reset(mdata);
284 static void mtk_spi_prepare_transfer(struct spi_master *master,
285 struct spi_transfer *xfer)
287 u32 spi_clk_hz, div, sck_time, cs_time, reg_val;
288 struct mtk_spi *mdata = spi_master_get_devdata(master);
290 spi_clk_hz = clk_get_rate(mdata->spi_clk);
291 if (xfer->speed_hz < spi_clk_hz / 2)
292 div = DIV_ROUND_UP(spi_clk_hz, xfer->speed_hz);
296 sck_time = (div + 1) / 2;
297 cs_time = sck_time * 2;
299 if (mdata->dev_comp->enhance_timing) {
300 reg_val = (((sck_time - 1) & 0xffff)
301 << SPI_CFG2_SCK_HIGH_OFFSET);
302 reg_val |= (((sck_time - 1) & 0xffff)
303 << SPI_CFG2_SCK_LOW_OFFSET);
304 writel(reg_val, mdata->base + SPI_CFG2_REG);
305 reg_val = (((cs_time - 1) & 0xffff)
306 << SPI_ADJUST_CFG0_CS_HOLD_OFFSET);
307 reg_val |= (((cs_time - 1) & 0xffff)
308 << SPI_ADJUST_CFG0_CS_SETUP_OFFSET);
309 writel(reg_val, mdata->base + SPI_CFG0_REG);
311 reg_val = (((sck_time - 1) & 0xff)
312 << SPI_CFG0_SCK_HIGH_OFFSET);
313 reg_val |= (((sck_time - 1) & 0xff) << SPI_CFG0_SCK_LOW_OFFSET);
314 reg_val |= (((cs_time - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
315 reg_val |= (((cs_time - 1) & 0xff) << SPI_CFG0_CS_SETUP_OFFSET);
316 writel(reg_val, mdata->base + SPI_CFG0_REG);
319 reg_val = readl(mdata->base + SPI_CFG1_REG);
320 reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
321 reg_val |= (((cs_time - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
322 writel(reg_val, mdata->base + SPI_CFG1_REG);
325 static void mtk_spi_setup_packet(struct spi_master *master)
327 u32 packet_size, packet_loop, reg_val;
328 struct mtk_spi *mdata = spi_master_get_devdata(master);
330 packet_size = min_t(u32, mdata->xfer_len, MTK_SPI_PACKET_SIZE);
331 packet_loop = mdata->xfer_len / packet_size;
333 reg_val = readl(mdata->base + SPI_CFG1_REG);
334 reg_val &= ~(SPI_CFG1_PACKET_LENGTH_MASK | SPI_CFG1_PACKET_LOOP_MASK);
335 reg_val |= (packet_size - 1) << SPI_CFG1_PACKET_LENGTH_OFFSET;
336 reg_val |= (packet_loop - 1) << SPI_CFG1_PACKET_LOOP_OFFSET;
337 writel(reg_val, mdata->base + SPI_CFG1_REG);
340 static void mtk_spi_enable_transfer(struct spi_master *master)
343 struct mtk_spi *mdata = spi_master_get_devdata(master);
345 cmd = readl(mdata->base + SPI_CMD_REG);
346 if (mdata->state == MTK_SPI_IDLE)
349 cmd |= SPI_CMD_RESUME;
350 writel(cmd, mdata->base + SPI_CMD_REG);
353 static int mtk_spi_get_mult_delta(u32 xfer_len)
357 if (xfer_len > MTK_SPI_PACKET_SIZE)
358 mult_delta = xfer_len % MTK_SPI_PACKET_SIZE;
365 static void mtk_spi_update_mdata_len(struct spi_master *master)
368 struct mtk_spi *mdata = spi_master_get_devdata(master);
370 if (mdata->tx_sgl_len && mdata->rx_sgl_len) {
371 if (mdata->tx_sgl_len > mdata->rx_sgl_len) {
372 mult_delta = mtk_spi_get_mult_delta(mdata->rx_sgl_len);
373 mdata->xfer_len = mdata->rx_sgl_len - mult_delta;
374 mdata->rx_sgl_len = mult_delta;
375 mdata->tx_sgl_len -= mdata->xfer_len;
377 mult_delta = mtk_spi_get_mult_delta(mdata->tx_sgl_len);
378 mdata->xfer_len = mdata->tx_sgl_len - mult_delta;
379 mdata->tx_sgl_len = mult_delta;
380 mdata->rx_sgl_len -= mdata->xfer_len;
382 } else if (mdata->tx_sgl_len) {
383 mult_delta = mtk_spi_get_mult_delta(mdata->tx_sgl_len);
384 mdata->xfer_len = mdata->tx_sgl_len - mult_delta;
385 mdata->tx_sgl_len = mult_delta;
386 } else if (mdata->rx_sgl_len) {
387 mult_delta = mtk_spi_get_mult_delta(mdata->rx_sgl_len);
388 mdata->xfer_len = mdata->rx_sgl_len - mult_delta;
389 mdata->rx_sgl_len = mult_delta;
393 static void mtk_spi_setup_dma_addr(struct spi_master *master,
394 struct spi_transfer *xfer)
396 struct mtk_spi *mdata = spi_master_get_devdata(master);
399 writel((u32)(xfer->tx_dma & MTK_SPI_32BITS_MASK),
400 mdata->base + SPI_TX_SRC_REG);
401 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
402 if (mdata->dev_comp->dma_ext)
403 writel((u32)(xfer->tx_dma >> 32),
404 mdata->base + SPI_TX_SRC_REG_64);
409 writel((u32)(xfer->rx_dma & MTK_SPI_32BITS_MASK),
410 mdata->base + SPI_RX_DST_REG);
411 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
412 if (mdata->dev_comp->dma_ext)
413 writel((u32)(xfer->rx_dma >> 32),
414 mdata->base + SPI_RX_DST_REG_64);
419 static int mtk_spi_fifo_transfer(struct spi_master *master,
420 struct spi_device *spi,
421 struct spi_transfer *xfer)
425 struct mtk_spi *mdata = spi_master_get_devdata(master);
427 mdata->cur_transfer = xfer;
428 mdata->xfer_len = min(MTK_SPI_MAX_FIFO_SIZE, xfer->len);
429 mdata->num_xfered = 0;
430 mtk_spi_prepare_transfer(master, xfer);
431 mtk_spi_setup_packet(master);
434 iowrite32_rep(mdata->base + SPI_TX_DATA_REG, xfer->tx_buf, cnt);
436 remainder = xfer->len % 4;
439 memcpy(®_val, xfer->tx_buf + (cnt * 4), remainder);
440 writel(reg_val, mdata->base + SPI_TX_DATA_REG);
443 mtk_spi_enable_transfer(master);
448 static int mtk_spi_dma_transfer(struct spi_master *master,
449 struct spi_device *spi,
450 struct spi_transfer *xfer)
453 struct mtk_spi *mdata = spi_master_get_devdata(master);
455 mdata->tx_sgl = NULL;
456 mdata->rx_sgl = NULL;
457 mdata->tx_sgl_len = 0;
458 mdata->rx_sgl_len = 0;
459 mdata->cur_transfer = xfer;
460 mdata->num_xfered = 0;
462 mtk_spi_prepare_transfer(master, xfer);
464 cmd = readl(mdata->base + SPI_CMD_REG);
466 cmd |= SPI_CMD_TX_DMA;
468 cmd |= SPI_CMD_RX_DMA;
469 writel(cmd, mdata->base + SPI_CMD_REG);
472 mdata->tx_sgl = xfer->tx_sg.sgl;
474 mdata->rx_sgl = xfer->rx_sg.sgl;
477 xfer->tx_dma = sg_dma_address(mdata->tx_sgl);
478 mdata->tx_sgl_len = sg_dma_len(mdata->tx_sgl);
481 xfer->rx_dma = sg_dma_address(mdata->rx_sgl);
482 mdata->rx_sgl_len = sg_dma_len(mdata->rx_sgl);
485 mtk_spi_update_mdata_len(master);
486 mtk_spi_setup_packet(master);
487 mtk_spi_setup_dma_addr(master, xfer);
488 mtk_spi_enable_transfer(master);
493 static int mtk_spi_transfer_one(struct spi_master *master,
494 struct spi_device *spi,
495 struct spi_transfer *xfer)
497 if (master->can_dma(master, spi, xfer))
498 return mtk_spi_dma_transfer(master, spi, xfer);
500 return mtk_spi_fifo_transfer(master, spi, xfer);
503 static bool mtk_spi_can_dma(struct spi_master *master,
504 struct spi_device *spi,
505 struct spi_transfer *xfer)
507 /* Buffers for DMA transactions must be 4-byte aligned */
508 return (xfer->len > MTK_SPI_MAX_FIFO_SIZE &&
509 (unsigned long)xfer->tx_buf % 4 == 0 &&
510 (unsigned long)xfer->rx_buf % 4 == 0);
513 static int mtk_spi_setup(struct spi_device *spi)
515 struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
517 if (!spi->controller_data)
518 spi->controller_data = (void *)&mtk_default_chip_info;
520 if (mdata->dev_comp->need_pad_sel && gpio_is_valid(spi->cs_gpio))
521 gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
526 static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id)
528 u32 cmd, reg_val, cnt, remainder, len;
529 struct spi_master *master = dev_id;
530 struct mtk_spi *mdata = spi_master_get_devdata(master);
531 struct spi_transfer *trans = mdata->cur_transfer;
533 reg_val = readl(mdata->base + SPI_STATUS0_REG);
534 if (reg_val & MTK_SPI_PAUSE_INT_STATUS)
535 mdata->state = MTK_SPI_PAUSED;
537 mdata->state = MTK_SPI_IDLE;
539 if (!master->can_dma(master, master->cur_msg->spi, trans)) {
541 cnt = mdata->xfer_len / 4;
542 ioread32_rep(mdata->base + SPI_RX_DATA_REG,
543 trans->rx_buf + mdata->num_xfered, cnt);
544 remainder = mdata->xfer_len % 4;
546 reg_val = readl(mdata->base + SPI_RX_DATA_REG);
547 memcpy(trans->rx_buf +
555 mdata->num_xfered += mdata->xfer_len;
556 if (mdata->num_xfered == trans->len) {
557 spi_finalize_current_transfer(master);
561 len = trans->len - mdata->num_xfered;
562 mdata->xfer_len = min(MTK_SPI_MAX_FIFO_SIZE, len);
563 mtk_spi_setup_packet(master);
565 cnt = mdata->xfer_len / 4;
566 iowrite32_rep(mdata->base + SPI_TX_DATA_REG,
567 trans->tx_buf + mdata->num_xfered, cnt);
569 remainder = mdata->xfer_len % 4;
573 trans->tx_buf + (cnt * 4) + mdata->num_xfered,
575 writel(reg_val, mdata->base + SPI_TX_DATA_REG);
578 mtk_spi_enable_transfer(master);
584 trans->tx_dma += mdata->xfer_len;
586 trans->rx_dma += mdata->xfer_len;
588 if (mdata->tx_sgl && (mdata->tx_sgl_len == 0)) {
589 mdata->tx_sgl = sg_next(mdata->tx_sgl);
591 trans->tx_dma = sg_dma_address(mdata->tx_sgl);
592 mdata->tx_sgl_len = sg_dma_len(mdata->tx_sgl);
595 if (mdata->rx_sgl && (mdata->rx_sgl_len == 0)) {
596 mdata->rx_sgl = sg_next(mdata->rx_sgl);
598 trans->rx_dma = sg_dma_address(mdata->rx_sgl);
599 mdata->rx_sgl_len = sg_dma_len(mdata->rx_sgl);
603 if (!mdata->tx_sgl && !mdata->rx_sgl) {
604 /* spi disable dma */
605 cmd = readl(mdata->base + SPI_CMD_REG);
606 cmd &= ~SPI_CMD_TX_DMA;
607 cmd &= ~SPI_CMD_RX_DMA;
608 writel(cmd, mdata->base + SPI_CMD_REG);
610 spi_finalize_current_transfer(master);
614 mtk_spi_update_mdata_len(master);
615 mtk_spi_setup_packet(master);
616 mtk_spi_setup_dma_addr(master, trans);
617 mtk_spi_enable_transfer(master);
622 static int mtk_spi_probe(struct platform_device *pdev)
624 struct spi_master *master;
625 struct mtk_spi *mdata;
626 const struct of_device_id *of_id;
627 int i, irq, ret, addr_bits;
629 master = spi_alloc_master(&pdev->dev, sizeof(*mdata));
631 dev_err(&pdev->dev, "failed to alloc spi master\n");
635 master->auto_runtime_pm = true;
636 master->dev.of_node = pdev->dev.of_node;
637 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
639 master->set_cs = mtk_spi_set_cs;
640 master->prepare_message = mtk_spi_prepare_message;
641 master->transfer_one = mtk_spi_transfer_one;
642 master->can_dma = mtk_spi_can_dma;
643 master->setup = mtk_spi_setup;
645 of_id = of_match_node(mtk_spi_of_match, pdev->dev.of_node);
647 dev_err(&pdev->dev, "failed to probe of_node\n");
652 mdata = spi_master_get_devdata(master);
653 mdata->dev_comp = of_id->data;
655 if (mdata->dev_comp->enhance_timing)
656 master->mode_bits |= SPI_CS_HIGH;
658 if (mdata->dev_comp->must_tx)
659 master->flags = SPI_MASTER_MUST_TX;
661 if (mdata->dev_comp->need_pad_sel) {
662 mdata->pad_num = of_property_count_u32_elems(
664 "mediatek,pad-select");
665 if (mdata->pad_num < 0) {
667 "No 'mediatek,pad-select' property\n");
672 mdata->pad_sel = devm_kmalloc_array(&pdev->dev, mdata->pad_num,
673 sizeof(u32), GFP_KERNEL);
674 if (!mdata->pad_sel) {
679 for (i = 0; i < mdata->pad_num; i++) {
680 of_property_read_u32_index(pdev->dev.of_node,
681 "mediatek,pad-select",
682 i, &mdata->pad_sel[i]);
683 if (mdata->pad_sel[i] > MT8173_SPI_MAX_PAD_SEL) {
684 dev_err(&pdev->dev, "wrong pad-sel[%d]: %u\n",
685 i, mdata->pad_sel[i]);
692 platform_set_drvdata(pdev, master);
693 mdata->base = devm_platform_ioremap_resource(pdev, 0);
694 if (IS_ERR(mdata->base)) {
695 ret = PTR_ERR(mdata->base);
699 irq = platform_get_irq(pdev, 0);
705 if (!pdev->dev.dma_mask)
706 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
708 ret = devm_request_irq(&pdev->dev, irq, mtk_spi_interrupt,
709 IRQF_TRIGGER_NONE, dev_name(&pdev->dev), master);
711 dev_err(&pdev->dev, "failed to register irq (%d)\n", ret);
715 mdata->parent_clk = devm_clk_get(&pdev->dev, "parent-clk");
716 if (IS_ERR(mdata->parent_clk)) {
717 ret = PTR_ERR(mdata->parent_clk);
718 dev_err(&pdev->dev, "failed to get parent-clk: %d\n", ret);
722 mdata->sel_clk = devm_clk_get(&pdev->dev, "sel-clk");
723 if (IS_ERR(mdata->sel_clk)) {
724 ret = PTR_ERR(mdata->sel_clk);
725 dev_err(&pdev->dev, "failed to get sel-clk: %d\n", ret);
729 mdata->spi_clk = devm_clk_get(&pdev->dev, "spi-clk");
730 if (IS_ERR(mdata->spi_clk)) {
731 ret = PTR_ERR(mdata->spi_clk);
732 dev_err(&pdev->dev, "failed to get spi-clk: %d\n", ret);
736 ret = clk_prepare_enable(mdata->spi_clk);
738 dev_err(&pdev->dev, "failed to enable spi_clk (%d)\n", ret);
742 ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
744 dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
745 clk_disable_unprepare(mdata->spi_clk);
749 clk_disable_unprepare(mdata->spi_clk);
751 pm_runtime_enable(&pdev->dev);
753 ret = devm_spi_register_master(&pdev->dev, master);
755 dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
756 goto err_disable_runtime_pm;
759 if (mdata->dev_comp->need_pad_sel) {
760 if (mdata->pad_num != master->num_chipselect) {
762 "pad_num does not match num_chipselect(%d != %d)\n",
763 mdata->pad_num, master->num_chipselect);
765 goto err_disable_runtime_pm;
768 if (!master->cs_gpios && master->num_chipselect > 1) {
770 "cs_gpios not specified and num_chipselect > 1\n");
772 goto err_disable_runtime_pm;
775 if (master->cs_gpios) {
776 for (i = 0; i < master->num_chipselect; i++) {
777 ret = devm_gpio_request(&pdev->dev,
779 dev_name(&pdev->dev));
782 "can't get CS GPIO %i\n", i);
783 goto err_disable_runtime_pm;
789 if (mdata->dev_comp->dma_ext)
790 addr_bits = DMA_ADDR_EXT_BITS;
792 addr_bits = DMA_ADDR_DEF_BITS;
793 ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(addr_bits));
795 dev_notice(&pdev->dev, "SPI dma_set_mask(%d) failed, ret:%d\n",
800 err_disable_runtime_pm:
801 pm_runtime_disable(&pdev->dev);
803 spi_master_put(master);
808 static int mtk_spi_remove(struct platform_device *pdev)
810 struct spi_master *master = platform_get_drvdata(pdev);
811 struct mtk_spi *mdata = spi_master_get_devdata(master);
813 pm_runtime_disable(&pdev->dev);
815 mtk_spi_reset(mdata);
820 #ifdef CONFIG_PM_SLEEP
821 static int mtk_spi_suspend(struct device *dev)
824 struct spi_master *master = dev_get_drvdata(dev);
825 struct mtk_spi *mdata = spi_master_get_devdata(master);
827 ret = spi_master_suspend(master);
831 if (!pm_runtime_suspended(dev))
832 clk_disable_unprepare(mdata->spi_clk);
837 static int mtk_spi_resume(struct device *dev)
840 struct spi_master *master = dev_get_drvdata(dev);
841 struct mtk_spi *mdata = spi_master_get_devdata(master);
843 if (!pm_runtime_suspended(dev)) {
844 ret = clk_prepare_enable(mdata->spi_clk);
846 dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
851 ret = spi_master_resume(master);
853 clk_disable_unprepare(mdata->spi_clk);
857 #endif /* CONFIG_PM_SLEEP */
860 static int mtk_spi_runtime_suspend(struct device *dev)
862 struct spi_master *master = dev_get_drvdata(dev);
863 struct mtk_spi *mdata = spi_master_get_devdata(master);
865 clk_disable_unprepare(mdata->spi_clk);
870 static int mtk_spi_runtime_resume(struct device *dev)
872 struct spi_master *master = dev_get_drvdata(dev);
873 struct mtk_spi *mdata = spi_master_get_devdata(master);
876 ret = clk_prepare_enable(mdata->spi_clk);
878 dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
884 #endif /* CONFIG_PM */
886 static const struct dev_pm_ops mtk_spi_pm = {
887 SET_SYSTEM_SLEEP_PM_OPS(mtk_spi_suspend, mtk_spi_resume)
888 SET_RUNTIME_PM_OPS(mtk_spi_runtime_suspend,
889 mtk_spi_runtime_resume, NULL)
892 static struct platform_driver mtk_spi_driver = {
896 .of_match_table = mtk_spi_of_match,
898 .probe = mtk_spi_probe,
899 .remove = mtk_spi_remove,
902 module_platform_driver(mtk_spi_driver);
904 MODULE_DESCRIPTION("MTK SPI Controller driver");
905 MODULE_AUTHOR("Leilk Liu <leilk.liu@mediatek.com>");
906 MODULE_LICENSE("GPL v2");
907 MODULE_ALIAS("platform:mtk-spi");