2 * Copyright (C) 2009 Samsung Electronics Ltd.
3 * Jaswinder Singh <jassi.brar@samsung.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/interrupt.h>
19 #include <linux/delay.h>
20 #include <linux/clk.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/dmaengine.h>
23 #include <linux/platform_device.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/spi/spi.h>
26 #include <linux/gpio.h>
28 #include <linux/of_gpio.h>
30 #include <linux/platform_data/spi-s3c64xx.h>
32 #define MAX_SPI_PORTS 6
33 #define S3C64XX_SPI_QUIRK_POLL (1 << 0)
34 #define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1)
35 #define AUTOSUSPEND_TIMEOUT 2000
37 /* Registers and bit-fields */
39 #define S3C64XX_SPI_CH_CFG 0x00
40 #define S3C64XX_SPI_CLK_CFG 0x04
41 #define S3C64XX_SPI_MODE_CFG 0x08
42 #define S3C64XX_SPI_SLAVE_SEL 0x0C
43 #define S3C64XX_SPI_INT_EN 0x10
44 #define S3C64XX_SPI_STATUS 0x14
45 #define S3C64XX_SPI_TX_DATA 0x18
46 #define S3C64XX_SPI_RX_DATA 0x1C
47 #define S3C64XX_SPI_PACKET_CNT 0x20
48 #define S3C64XX_SPI_PENDING_CLR 0x24
49 #define S3C64XX_SPI_SWAP_CFG 0x28
50 #define S3C64XX_SPI_FB_CLK 0x2C
52 #define S3C64XX_SPI_CH_HS_EN (1<<6) /* High Speed Enable */
53 #define S3C64XX_SPI_CH_SW_RST (1<<5)
54 #define S3C64XX_SPI_CH_SLAVE (1<<4)
55 #define S3C64XX_SPI_CPOL_L (1<<3)
56 #define S3C64XX_SPI_CPHA_B (1<<2)
57 #define S3C64XX_SPI_CH_RXCH_ON (1<<1)
58 #define S3C64XX_SPI_CH_TXCH_ON (1<<0)
60 #define S3C64XX_SPI_CLKSEL_SRCMSK (3<<9)
61 #define S3C64XX_SPI_CLKSEL_SRCSHFT 9
62 #define S3C64XX_SPI_ENCLK_ENABLE (1<<8)
63 #define S3C64XX_SPI_PSR_MASK 0xff
65 #define S3C64XX_SPI_MODE_CH_TSZ_BYTE (0<<29)
66 #define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD (1<<29)
67 #define S3C64XX_SPI_MODE_CH_TSZ_WORD (2<<29)
68 #define S3C64XX_SPI_MODE_CH_TSZ_MASK (3<<29)
69 #define S3C64XX_SPI_MODE_BUS_TSZ_BYTE (0<<17)
70 #define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD (1<<17)
71 #define S3C64XX_SPI_MODE_BUS_TSZ_WORD (2<<17)
72 #define S3C64XX_SPI_MODE_BUS_TSZ_MASK (3<<17)
73 #define S3C64XX_SPI_MODE_RXDMA_ON (1<<2)
74 #define S3C64XX_SPI_MODE_TXDMA_ON (1<<1)
75 #define S3C64XX_SPI_MODE_4BURST (1<<0)
77 #define S3C64XX_SPI_SLAVE_AUTO (1<<1)
78 #define S3C64XX_SPI_SLAVE_SIG_INACT (1<<0)
79 #define S3C64XX_SPI_SLAVE_NSC_CNT_2 (2<<4)
81 #define S3C64XX_SPI_INT_TRAILING_EN (1<<6)
82 #define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5)
83 #define S3C64XX_SPI_INT_RX_UNDERRUN_EN (1<<4)
84 #define S3C64XX_SPI_INT_TX_OVERRUN_EN (1<<3)
85 #define S3C64XX_SPI_INT_TX_UNDERRUN_EN (1<<2)
86 #define S3C64XX_SPI_INT_RX_FIFORDY_EN (1<<1)
87 #define S3C64XX_SPI_INT_TX_FIFORDY_EN (1<<0)
89 #define S3C64XX_SPI_ST_RX_OVERRUN_ERR (1<<5)
90 #define S3C64XX_SPI_ST_RX_UNDERRUN_ERR (1<<4)
91 #define S3C64XX_SPI_ST_TX_OVERRUN_ERR (1<<3)
92 #define S3C64XX_SPI_ST_TX_UNDERRUN_ERR (1<<2)
93 #define S3C64XX_SPI_ST_RX_FIFORDY (1<<1)
94 #define S3C64XX_SPI_ST_TX_FIFORDY (1<<0)
96 #define S3C64XX_SPI_PACKET_CNT_EN (1<<16)
98 #define S3C64XX_SPI_PND_TX_UNDERRUN_CLR (1<<4)
99 #define S3C64XX_SPI_PND_TX_OVERRUN_CLR (1<<3)
100 #define S3C64XX_SPI_PND_RX_UNDERRUN_CLR (1<<2)
101 #define S3C64XX_SPI_PND_RX_OVERRUN_CLR (1<<1)
102 #define S3C64XX_SPI_PND_TRAILING_CLR (1<<0)
104 #define S3C64XX_SPI_SWAP_RX_HALF_WORD (1<<7)
105 #define S3C64XX_SPI_SWAP_RX_BYTE (1<<6)
106 #define S3C64XX_SPI_SWAP_RX_BIT (1<<5)
107 #define S3C64XX_SPI_SWAP_RX_EN (1<<4)
108 #define S3C64XX_SPI_SWAP_TX_HALF_WORD (1<<3)
109 #define S3C64XX_SPI_SWAP_TX_BYTE (1<<2)
110 #define S3C64XX_SPI_SWAP_TX_BIT (1<<1)
111 #define S3C64XX_SPI_SWAP_TX_EN (1<<0)
113 #define S3C64XX_SPI_FBCLK_MSK (3<<0)
115 #define FIFO_LVL_MASK(i) ((i)->port_conf->fifo_lvl_mask[i->port_id])
116 #define S3C64XX_SPI_ST_TX_DONE(v, i) (((v) & \
117 (1 << (i)->port_conf->tx_st_done)) ? 1 : 0)
118 #define TX_FIFO_LVL(v, i) (((v) >> 6) & FIFO_LVL_MASK(i))
119 #define RX_FIFO_LVL(v, i) (((v) >> (i)->port_conf->rx_lvl_offset) & \
122 #define S3C64XX_SPI_MAX_TRAILCNT 0x3ff
123 #define S3C64XX_SPI_TRAILCNT_OFF 19
125 #define S3C64XX_SPI_TRAILCNT S3C64XX_SPI_MAX_TRAILCNT
127 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
128 #define is_polling(x) (x->port_conf->quirks & S3C64XX_SPI_QUIRK_POLL)
130 #define RXBUSY (1<<2)
131 #define TXBUSY (1<<3)
133 struct s3c64xx_spi_dma_data {
135 enum dma_transfer_direction direction;
139 * struct s3c64xx_spi_info - SPI Controller hardware info
140 * @fifo_lvl_mask: Bit-mask for {TX|RX}_FIFO_LVL bits in SPI_STATUS register.
141 * @rx_lvl_offset: Bit offset of RX_FIFO_LVL bits in SPI_STATUS regiter.
142 * @tx_st_done: Bit offset of TX_DONE bit in SPI_STATUS regiter.
143 * @high_speed: True, if the controller supports HIGH_SPEED_EN bit.
144 * @clk_from_cmu: True, if the controller does not include a clock mux and
147 * The Samsung s3c64xx SPI controller are used on various Samsung SoC's but
148 * differ in some aspects such as the size of the fifo and spi bus clock
149 * setup. Such differences are specified to the driver using this structure
150 * which is provided as driver data to the driver.
152 struct s3c64xx_spi_port_config {
153 int fifo_lvl_mask[MAX_SPI_PORTS];
162 * struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver.
163 * @clk: Pointer to the spi clock.
164 * @src_clk: Pointer to the clock used to generate SPI signals.
165 * @master: Pointer to the SPI Protocol master.
166 * @cntrlr_info: Platform specific data for the controller this driver manages.
167 * @tgl_spi: Pointer to the last CS left untoggled by the cs_change hint.
168 * @lock: Controller specific lock.
169 * @state: Set of FLAGS to indicate status.
170 * @rx_dmach: Controller's DMA channel for Rx.
171 * @tx_dmach: Controller's DMA channel for Tx.
172 * @sfr_start: BUS address of SPI controller regs.
173 * @regs: Pointer to ioremap'ed controller registers.
175 * @xfer_completion: To indicate completion of xfer task.
176 * @cur_mode: Stores the active configuration of the controller.
177 * @cur_bpw: Stores the active bits per word settings.
178 * @cur_speed: Stores the active xfer clock speed.
180 struct s3c64xx_spi_driver_data {
184 struct platform_device *pdev;
185 struct spi_master *master;
186 struct s3c64xx_spi_info *cntrlr_info;
187 struct spi_device *tgl_spi;
189 unsigned long sfr_start;
190 struct completion xfer_completion;
192 unsigned cur_mode, cur_bpw;
194 struct s3c64xx_spi_dma_data rx_dma;
195 struct s3c64xx_spi_dma_data tx_dma;
196 struct s3c64xx_spi_port_config *port_conf;
197 unsigned int port_id;
200 static void flush_fifo(struct s3c64xx_spi_driver_data *sdd)
202 void __iomem *regs = sdd->regs;
206 writel(0, regs + S3C64XX_SPI_PACKET_CNT);
208 val = readl(regs + S3C64XX_SPI_CH_CFG);
209 val &= ~(S3C64XX_SPI_CH_RXCH_ON | S3C64XX_SPI_CH_TXCH_ON);
210 writel(val, regs + S3C64XX_SPI_CH_CFG);
212 val = readl(regs + S3C64XX_SPI_CH_CFG);
213 val |= S3C64XX_SPI_CH_SW_RST;
214 val &= ~S3C64XX_SPI_CH_HS_EN;
215 writel(val, regs + S3C64XX_SPI_CH_CFG);
218 loops = msecs_to_loops(1);
220 val = readl(regs + S3C64XX_SPI_STATUS);
221 } while (TX_FIFO_LVL(val, sdd) && loops--);
224 dev_warn(&sdd->pdev->dev, "Timed out flushing TX FIFO\n");
227 loops = msecs_to_loops(1);
229 val = readl(regs + S3C64XX_SPI_STATUS);
230 if (RX_FIFO_LVL(val, sdd))
231 readl(regs + S3C64XX_SPI_RX_DATA);
237 dev_warn(&sdd->pdev->dev, "Timed out flushing RX FIFO\n");
239 val = readl(regs + S3C64XX_SPI_CH_CFG);
240 val &= ~S3C64XX_SPI_CH_SW_RST;
241 writel(val, regs + S3C64XX_SPI_CH_CFG);
243 val = readl(regs + S3C64XX_SPI_MODE_CFG);
244 val &= ~(S3C64XX_SPI_MODE_TXDMA_ON | S3C64XX_SPI_MODE_RXDMA_ON);
245 writel(val, regs + S3C64XX_SPI_MODE_CFG);
248 static void s3c64xx_spi_dmacb(void *data)
250 struct s3c64xx_spi_driver_data *sdd;
251 struct s3c64xx_spi_dma_data *dma = data;
254 if (dma->direction == DMA_DEV_TO_MEM)
255 sdd = container_of(data,
256 struct s3c64xx_spi_driver_data, rx_dma);
258 sdd = container_of(data,
259 struct s3c64xx_spi_driver_data, tx_dma);
261 spin_lock_irqsave(&sdd->lock, flags);
263 if (dma->direction == DMA_DEV_TO_MEM) {
264 sdd->state &= ~RXBUSY;
265 if (!(sdd->state & TXBUSY))
266 complete(&sdd->xfer_completion);
268 sdd->state &= ~TXBUSY;
269 if (!(sdd->state & RXBUSY))
270 complete(&sdd->xfer_completion);
273 spin_unlock_irqrestore(&sdd->lock, flags);
276 static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
277 struct sg_table *sgt)
279 struct s3c64xx_spi_driver_data *sdd;
280 struct dma_slave_config config;
281 struct dma_async_tx_descriptor *desc;
283 memset(&config, 0, sizeof(config));
285 if (dma->direction == DMA_DEV_TO_MEM) {
286 sdd = container_of((void *)dma,
287 struct s3c64xx_spi_driver_data, rx_dma);
288 config.direction = dma->direction;
289 config.src_addr = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
290 config.src_addr_width = sdd->cur_bpw / 8;
291 config.src_maxburst = 1;
292 dmaengine_slave_config(dma->ch, &config);
294 sdd = container_of((void *)dma,
295 struct s3c64xx_spi_driver_data, tx_dma);
296 config.direction = dma->direction;
297 config.dst_addr = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
298 config.dst_addr_width = sdd->cur_bpw / 8;
299 config.dst_maxburst = 1;
300 dmaengine_slave_config(dma->ch, &config);
303 desc = dmaengine_prep_slave_sg(dma->ch, sgt->sgl, sgt->nents,
304 dma->direction, DMA_PREP_INTERRUPT);
306 desc->callback = s3c64xx_spi_dmacb;
307 desc->callback_param = dma;
309 dmaengine_submit(desc);
310 dma_async_issue_pending(dma->ch);
313 static void s3c64xx_spi_set_cs(struct spi_device *spi, bool enable)
315 struct s3c64xx_spi_driver_data *sdd =
316 spi_master_get_devdata(spi->master);
318 if (sdd->cntrlr_info->no_cs)
322 if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO)) {
323 writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
325 u32 ssel = readl(sdd->regs + S3C64XX_SPI_SLAVE_SEL);
327 ssel |= (S3C64XX_SPI_SLAVE_AUTO |
328 S3C64XX_SPI_SLAVE_NSC_CNT_2);
329 writel(ssel, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
332 if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
333 writel(S3C64XX_SPI_SLAVE_SIG_INACT,
334 sdd->regs + S3C64XX_SPI_SLAVE_SEL);
338 static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
340 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
341 dma_filter_fn filter = sdd->cntrlr_info->filter;
342 struct device *dev = &sdd->pdev->dev;
349 dma_cap_set(DMA_SLAVE, mask);
351 /* Acquire DMA channels */
352 sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter,
353 sdd->cntrlr_info->dma_rx, dev, "rx");
354 if (!sdd->rx_dma.ch) {
355 dev_err(dev, "Failed to get RX DMA channel\n");
358 spi->dma_rx = sdd->rx_dma.ch;
360 sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter,
361 sdd->cntrlr_info->dma_tx, dev, "tx");
362 if (!sdd->tx_dma.ch) {
363 dev_err(dev, "Failed to get TX DMA channel\n");
364 dma_release_channel(sdd->rx_dma.ch);
367 spi->dma_tx = sdd->tx_dma.ch;
372 static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
374 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
376 /* Free DMA channels */
377 if (!is_polling(sdd)) {
378 dma_release_channel(sdd->rx_dma.ch);
379 dma_release_channel(sdd->tx_dma.ch);
385 static bool s3c64xx_spi_can_dma(struct spi_master *master,
386 struct spi_device *spi,
387 struct spi_transfer *xfer)
389 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
391 return xfer->len > (FIFO_LVL_MASK(sdd) >> 1) + 1;
394 static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
395 struct spi_device *spi,
396 struct spi_transfer *xfer, int dma_mode)
398 void __iomem *regs = sdd->regs;
401 modecfg = readl(regs + S3C64XX_SPI_MODE_CFG);
402 modecfg &= ~(S3C64XX_SPI_MODE_TXDMA_ON | S3C64XX_SPI_MODE_RXDMA_ON);
404 chcfg = readl(regs + S3C64XX_SPI_CH_CFG);
405 chcfg &= ~S3C64XX_SPI_CH_TXCH_ON;
408 chcfg &= ~S3C64XX_SPI_CH_RXCH_ON;
410 /* Always shift in data in FIFO, even if xfer is Tx only,
411 * this helps setting PCKT_CNT value for generating clocks
414 chcfg |= S3C64XX_SPI_CH_RXCH_ON;
415 writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff)
416 | S3C64XX_SPI_PACKET_CNT_EN,
417 regs + S3C64XX_SPI_PACKET_CNT);
420 if (xfer->tx_buf != NULL) {
421 sdd->state |= TXBUSY;
422 chcfg |= S3C64XX_SPI_CH_TXCH_ON;
424 modecfg |= S3C64XX_SPI_MODE_TXDMA_ON;
425 prepare_dma(&sdd->tx_dma, &xfer->tx_sg);
427 switch (sdd->cur_bpw) {
429 iowrite32_rep(regs + S3C64XX_SPI_TX_DATA,
430 xfer->tx_buf, xfer->len / 4);
433 iowrite16_rep(regs + S3C64XX_SPI_TX_DATA,
434 xfer->tx_buf, xfer->len / 2);
437 iowrite8_rep(regs + S3C64XX_SPI_TX_DATA,
438 xfer->tx_buf, xfer->len);
444 if (xfer->rx_buf != NULL) {
445 sdd->state |= RXBUSY;
447 if (sdd->port_conf->high_speed && sdd->cur_speed >= 30000000UL
448 && !(sdd->cur_mode & SPI_CPHA))
449 chcfg |= S3C64XX_SPI_CH_HS_EN;
452 modecfg |= S3C64XX_SPI_MODE_RXDMA_ON;
453 chcfg |= S3C64XX_SPI_CH_RXCH_ON;
454 writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff)
455 | S3C64XX_SPI_PACKET_CNT_EN,
456 regs + S3C64XX_SPI_PACKET_CNT);
457 prepare_dma(&sdd->rx_dma, &xfer->rx_sg);
461 writel(modecfg, regs + S3C64XX_SPI_MODE_CFG);
462 writel(chcfg, regs + S3C64XX_SPI_CH_CFG);
465 static u32 s3c64xx_spi_wait_for_timeout(struct s3c64xx_spi_driver_data *sdd,
468 void __iomem *regs = sdd->regs;
469 unsigned long val = 1;
472 /* max fifo depth available */
473 u32 max_fifo = (FIFO_LVL_MASK(sdd) >> 1) + 1;
476 val = msecs_to_loops(timeout_ms);
479 status = readl(regs + S3C64XX_SPI_STATUS);
480 } while (RX_FIFO_LVL(status, sdd) < max_fifo && --val);
482 /* return the actual received data length */
483 return RX_FIFO_LVL(status, sdd);
486 static int wait_for_dma(struct s3c64xx_spi_driver_data *sdd,
487 struct spi_transfer *xfer)
489 void __iomem *regs = sdd->regs;
494 /* millisecs to xfer 'len' bytes @ 'cur_speed' */
495 ms = xfer->len * 8 * 1000 / sdd->cur_speed;
496 ms += 10; /* some tolerance */
498 val = msecs_to_jiffies(ms) + 10;
499 val = wait_for_completion_timeout(&sdd->xfer_completion, val);
502 * If the previous xfer was completed within timeout, then
503 * proceed further else return -EIO.
504 * DmaTx returns after simply writing data in the FIFO,
505 * w/o waiting for real transmission on the bus to finish.
506 * DmaRx returns only after Dma read data from FIFO which
507 * needs bus transmission to finish, so we don't worry if
508 * Xfer involved Rx(with or without Tx).
510 if (val && !xfer->rx_buf) {
511 val = msecs_to_loops(10);
512 status = readl(regs + S3C64XX_SPI_STATUS);
513 while ((TX_FIFO_LVL(status, sdd)
514 || !S3C64XX_SPI_ST_TX_DONE(status, sdd))
517 status = readl(regs + S3C64XX_SPI_STATUS);
522 /* If timed out while checking rx/tx status return error */
529 static int wait_for_pio(struct s3c64xx_spi_driver_data *sdd,
530 struct spi_transfer *xfer)
532 void __iomem *regs = sdd->regs;
540 /* millisecs to xfer 'len' bytes @ 'cur_speed' */
541 ms = xfer->len * 8 * 1000 / sdd->cur_speed;
542 ms += 10; /* some tolerance */
544 val = msecs_to_loops(ms);
546 status = readl(regs + S3C64XX_SPI_STATUS);
547 } while (RX_FIFO_LVL(status, sdd) < xfer->len && --val);
550 /* If it was only Tx */
552 sdd->state &= ~TXBUSY;
557 * If the receive length is bigger than the controller fifo
558 * size, calculate the loops and read the fifo as many times.
559 * loops = length / max fifo size (calculated by using the
561 * For any size less than the fifo size the below code is
562 * executed atleast once.
564 loops = xfer->len / ((FIFO_LVL_MASK(sdd) >> 1) + 1);
567 /* wait for data to be received in the fifo */
568 cpy_len = s3c64xx_spi_wait_for_timeout(sdd,
571 switch (sdd->cur_bpw) {
573 ioread32_rep(regs + S3C64XX_SPI_RX_DATA,
577 ioread16_rep(regs + S3C64XX_SPI_RX_DATA,
581 ioread8_rep(regs + S3C64XX_SPI_RX_DATA,
588 sdd->state &= ~RXBUSY;
593 static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
595 void __iomem *regs = sdd->regs;
599 if (!sdd->port_conf->clk_from_cmu) {
600 val = readl(regs + S3C64XX_SPI_CLK_CFG);
601 val &= ~S3C64XX_SPI_ENCLK_ENABLE;
602 writel(val, regs + S3C64XX_SPI_CLK_CFG);
605 /* Set Polarity and Phase */
606 val = readl(regs + S3C64XX_SPI_CH_CFG);
607 val &= ~(S3C64XX_SPI_CH_SLAVE |
611 if (sdd->cur_mode & SPI_CPOL)
612 val |= S3C64XX_SPI_CPOL_L;
614 if (sdd->cur_mode & SPI_CPHA)
615 val |= S3C64XX_SPI_CPHA_B;
617 writel(val, regs + S3C64XX_SPI_CH_CFG);
619 /* Set Channel & DMA Mode */
620 val = readl(regs + S3C64XX_SPI_MODE_CFG);
621 val &= ~(S3C64XX_SPI_MODE_BUS_TSZ_MASK
622 | S3C64XX_SPI_MODE_CH_TSZ_MASK);
624 switch (sdd->cur_bpw) {
626 val |= S3C64XX_SPI_MODE_BUS_TSZ_WORD;
627 val |= S3C64XX_SPI_MODE_CH_TSZ_WORD;
630 val |= S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD;
631 val |= S3C64XX_SPI_MODE_CH_TSZ_HALFWORD;
634 val |= S3C64XX_SPI_MODE_BUS_TSZ_BYTE;
635 val |= S3C64XX_SPI_MODE_CH_TSZ_BYTE;
639 writel(val, regs + S3C64XX_SPI_MODE_CFG);
641 if (sdd->port_conf->clk_from_cmu) {
642 clk_set_rate(sdd->src_clk, sdd->cur_speed * 2);
644 /* Configure Clock */
645 val = readl(regs + S3C64XX_SPI_CLK_CFG);
646 val &= ~S3C64XX_SPI_PSR_MASK;
647 val |= ((clk_get_rate(sdd->src_clk) / sdd->cur_speed / 2 - 1)
648 & S3C64XX_SPI_PSR_MASK);
649 writel(val, regs + S3C64XX_SPI_CLK_CFG);
652 val = readl(regs + S3C64XX_SPI_CLK_CFG);
653 val |= S3C64XX_SPI_ENCLK_ENABLE;
654 writel(val, regs + S3C64XX_SPI_CLK_CFG);
658 #define XFER_DMAADDR_INVALID DMA_BIT_MASK(32)
660 static int s3c64xx_spi_prepare_message(struct spi_master *master,
661 struct spi_message *msg)
663 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
664 struct spi_device *spi = msg->spi;
665 struct s3c64xx_spi_csinfo *cs = spi->controller_data;
667 /* Configure feedback delay */
668 writel(cs->fb_delay & 0x3, sdd->regs + S3C64XX_SPI_FB_CLK);
673 static int s3c64xx_spi_transfer_one(struct spi_master *master,
674 struct spi_device *spi,
675 struct spi_transfer *xfer)
677 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
684 reinit_completion(&sdd->xfer_completion);
686 /* Only BPW and Speed may change across transfers */
687 bpw = xfer->bits_per_word;
688 speed = xfer->speed_hz;
690 if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) {
692 sdd->cur_speed = speed;
693 sdd->cur_mode = spi->mode;
694 s3c64xx_spi_config(sdd);
697 /* Polling method for xfers not bigger than FIFO capacity */
699 if (!is_polling(sdd) &&
700 (sdd->rx_dma.ch && sdd->tx_dma.ch &&
701 (xfer->len > ((FIFO_LVL_MASK(sdd) >> 1) + 1))))
704 spin_lock_irqsave(&sdd->lock, flags);
706 /* Pending only which is to be done */
707 sdd->state &= ~RXBUSY;
708 sdd->state &= ~TXBUSY;
710 enable_datapath(sdd, spi, xfer, use_dma);
712 /* Start the signals */
713 s3c64xx_spi_set_cs(spi, true);
715 spin_unlock_irqrestore(&sdd->lock, flags);
718 status = wait_for_dma(sdd, xfer);
720 status = wait_for_pio(sdd, xfer);
723 dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
724 xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
725 (sdd->state & RXBUSY) ? 'f' : 'p',
726 (sdd->state & TXBUSY) ? 'f' : 'p',
730 if (xfer->tx_buf != NULL
731 && (sdd->state & TXBUSY))
732 dmaengine_terminate_all(sdd->tx_dma.ch);
733 if (xfer->rx_buf != NULL
734 && (sdd->state & RXBUSY))
735 dmaengine_terminate_all(sdd->rx_dma.ch);
744 static struct s3c64xx_spi_csinfo *s3c64xx_get_slave_ctrldata(
745 struct spi_device *spi)
747 struct s3c64xx_spi_csinfo *cs;
748 struct device_node *slave_np, *data_np = NULL;
751 slave_np = spi->dev.of_node;
753 dev_err(&spi->dev, "device node not found\n");
754 return ERR_PTR(-EINVAL);
757 data_np = of_get_child_by_name(slave_np, "controller-data");
759 dev_err(&spi->dev, "child node 'controller-data' not found\n");
760 return ERR_PTR(-EINVAL);
763 cs = kzalloc(sizeof(*cs), GFP_KERNEL);
765 of_node_put(data_np);
766 return ERR_PTR(-ENOMEM);
769 of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay);
770 cs->fb_delay = fb_delay;
771 of_node_put(data_np);
776 * Here we only check the validity of requested configuration
777 * and save the configuration in a local data-structure.
778 * The controller is actually configured only just before we
779 * get a message to transfer.
781 static int s3c64xx_spi_setup(struct spi_device *spi)
783 struct s3c64xx_spi_csinfo *cs = spi->controller_data;
784 struct s3c64xx_spi_driver_data *sdd;
785 struct s3c64xx_spi_info *sci;
788 sdd = spi_master_get_devdata(spi->master);
789 if (spi->dev.of_node) {
790 cs = s3c64xx_get_slave_ctrldata(spi);
791 spi->controller_data = cs;
793 /* On non-DT platforms the SPI core will set spi->cs_gpio
794 * to -ENOENT. The GPIO pin used to drive the chip select
795 * is defined by using platform data so spi->cs_gpio value
796 * has to be override to have the proper GPIO pin number.
798 spi->cs_gpio = cs->line;
801 if (IS_ERR_OR_NULL(cs)) {
802 dev_err(&spi->dev, "No CS for SPI(%d)\n", spi->chip_select);
806 if (!spi_get_ctldata(spi)) {
807 if (gpio_is_valid(spi->cs_gpio)) {
808 err = gpio_request_one(spi->cs_gpio, GPIOF_OUT_INIT_HIGH,
809 dev_name(&spi->dev));
812 "Failed to get /CS gpio [%d]: %d\n",
818 spi_set_ctldata(spi, cs);
821 sci = sdd->cntrlr_info;
823 pm_runtime_get_sync(&sdd->pdev->dev);
825 /* Check if we can provide the requested rate */
826 if (!sdd->port_conf->clk_from_cmu) {
830 speed = clk_get_rate(sdd->src_clk) / 2 / (0 + 1);
832 if (spi->max_speed_hz > speed)
833 spi->max_speed_hz = speed;
835 psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;
836 psr &= S3C64XX_SPI_PSR_MASK;
837 if (psr == S3C64XX_SPI_PSR_MASK)
840 speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
841 if (spi->max_speed_hz < speed) {
842 if (psr+1 < S3C64XX_SPI_PSR_MASK) {
850 speed = clk_get_rate(sdd->src_clk) / 2 / (psr + 1);
851 if (spi->max_speed_hz >= speed) {
852 spi->max_speed_hz = speed;
854 dev_err(&spi->dev, "Can't set %dHz transfer speed\n",
861 pm_runtime_mark_last_busy(&sdd->pdev->dev);
862 pm_runtime_put_autosuspend(&sdd->pdev->dev);
863 s3c64xx_spi_set_cs(spi, false);
868 pm_runtime_mark_last_busy(&sdd->pdev->dev);
869 pm_runtime_put_autosuspend(&sdd->pdev->dev);
870 /* setup() returns with device de-selected */
871 s3c64xx_spi_set_cs(spi, false);
873 if (gpio_is_valid(spi->cs_gpio))
874 gpio_free(spi->cs_gpio);
875 spi_set_ctldata(spi, NULL);
878 if (spi->dev.of_node)
884 static void s3c64xx_spi_cleanup(struct spi_device *spi)
886 struct s3c64xx_spi_csinfo *cs = spi_get_ctldata(spi);
888 if (gpio_is_valid(spi->cs_gpio)) {
889 gpio_free(spi->cs_gpio);
890 if (spi->dev.of_node)
893 /* On non-DT platforms, the SPI core sets
894 * spi->cs_gpio to -ENOENT and .setup()
895 * overrides it with the GPIO pin value
896 * passed using platform data.
898 spi->cs_gpio = -ENOENT;
902 spi_set_ctldata(spi, NULL);
905 static irqreturn_t s3c64xx_spi_irq(int irq, void *data)
907 struct s3c64xx_spi_driver_data *sdd = data;
908 struct spi_master *spi = sdd->master;
909 unsigned int val, clr = 0;
911 val = readl(sdd->regs + S3C64XX_SPI_STATUS);
913 if (val & S3C64XX_SPI_ST_RX_OVERRUN_ERR) {
914 clr = S3C64XX_SPI_PND_RX_OVERRUN_CLR;
915 dev_err(&spi->dev, "RX overrun\n");
917 if (val & S3C64XX_SPI_ST_RX_UNDERRUN_ERR) {
918 clr |= S3C64XX_SPI_PND_RX_UNDERRUN_CLR;
919 dev_err(&spi->dev, "RX underrun\n");
921 if (val & S3C64XX_SPI_ST_TX_OVERRUN_ERR) {
922 clr |= S3C64XX_SPI_PND_TX_OVERRUN_CLR;
923 dev_err(&spi->dev, "TX overrun\n");
925 if (val & S3C64XX_SPI_ST_TX_UNDERRUN_ERR) {
926 clr |= S3C64XX_SPI_PND_TX_UNDERRUN_CLR;
927 dev_err(&spi->dev, "TX underrun\n");
930 /* Clear the pending irq by setting and then clearing it */
931 writel(clr, sdd->regs + S3C64XX_SPI_PENDING_CLR);
932 writel(0, sdd->regs + S3C64XX_SPI_PENDING_CLR);
937 static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd, int channel)
939 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
940 void __iomem *regs = sdd->regs;
946 writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
947 else if (!(sdd->port_conf->quirks & S3C64XX_SPI_QUIRK_CS_AUTO))
948 writel(S3C64XX_SPI_SLAVE_SIG_INACT, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
950 /* Disable Interrupts - we use Polling if not DMA mode */
951 writel(0, regs + S3C64XX_SPI_INT_EN);
953 if (!sdd->port_conf->clk_from_cmu)
954 writel(sci->src_clk_nr << S3C64XX_SPI_CLKSEL_SRCSHFT,
955 regs + S3C64XX_SPI_CLK_CFG);
956 writel(0, regs + S3C64XX_SPI_MODE_CFG);
957 writel(0, regs + S3C64XX_SPI_PACKET_CNT);
959 /* Clear any irq pending bits, should set and clear the bits */
960 val = S3C64XX_SPI_PND_RX_OVERRUN_CLR |
961 S3C64XX_SPI_PND_RX_UNDERRUN_CLR |
962 S3C64XX_SPI_PND_TX_OVERRUN_CLR |
963 S3C64XX_SPI_PND_TX_UNDERRUN_CLR;
964 writel(val, regs + S3C64XX_SPI_PENDING_CLR);
965 writel(0, regs + S3C64XX_SPI_PENDING_CLR);
967 writel(0, regs + S3C64XX_SPI_SWAP_CFG);
969 val = readl(regs + S3C64XX_SPI_MODE_CFG);
970 val &= ~S3C64XX_SPI_MODE_4BURST;
971 val &= ~(S3C64XX_SPI_MAX_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF);
972 val |= (S3C64XX_SPI_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF);
973 writel(val, regs + S3C64XX_SPI_MODE_CFG);
979 static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev)
981 struct s3c64xx_spi_info *sci;
984 sci = devm_kzalloc(dev, sizeof(*sci), GFP_KERNEL);
986 return ERR_PTR(-ENOMEM);
988 if (of_property_read_u32(dev->of_node, "samsung,spi-src-clk", &temp)) {
989 dev_warn(dev, "spi bus clock parent not specified, using clock at index 0 as parent\n");
992 sci->src_clk_nr = temp;
995 if (of_property_read_u32(dev->of_node, "num-cs", &temp)) {
996 dev_warn(dev, "number of chip select lines not specified, assuming 1 chip select line\n");
1002 sci->no_cs = of_property_read_bool(dev->of_node, "broken-cs");
1007 static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev)
1009 return dev_get_platdata(dev);
1013 static const struct of_device_id s3c64xx_spi_dt_match[];
1015 static inline struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config(
1016 struct platform_device *pdev)
1019 if (pdev->dev.of_node) {
1020 const struct of_device_id *match;
1021 match = of_match_node(s3c64xx_spi_dt_match, pdev->dev.of_node);
1022 return (struct s3c64xx_spi_port_config *)match->data;
1025 return (struct s3c64xx_spi_port_config *)
1026 platform_get_device_id(pdev)->driver_data;
1029 static int s3c64xx_spi_probe(struct platform_device *pdev)
1031 struct resource *mem_res;
1032 struct s3c64xx_spi_driver_data *sdd;
1033 struct s3c64xx_spi_info *sci = dev_get_platdata(&pdev->dev);
1034 struct spi_master *master;
1038 if (!sci && pdev->dev.of_node) {
1039 sci = s3c64xx_spi_parse_dt(&pdev->dev);
1041 return PTR_ERR(sci);
1045 dev_err(&pdev->dev, "platform_data missing!\n");
1049 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1050 if (mem_res == NULL) {
1051 dev_err(&pdev->dev, "Unable to get SPI MEM resource\n");
1055 irq = platform_get_irq(pdev, 0);
1057 dev_warn(&pdev->dev, "Failed to get IRQ: %d\n", irq);
1061 master = spi_alloc_master(&pdev->dev,
1062 sizeof(struct s3c64xx_spi_driver_data));
1063 if (master == NULL) {
1064 dev_err(&pdev->dev, "Unable to allocate SPI Master\n");
1068 platform_set_drvdata(pdev, master);
1070 sdd = spi_master_get_devdata(master);
1071 sdd->port_conf = s3c64xx_spi_get_port_config(pdev);
1072 sdd->master = master;
1073 sdd->cntrlr_info = sci;
1075 sdd->sfr_start = mem_res->start;
1076 if (pdev->dev.of_node) {
1077 ret = of_alias_get_id(pdev->dev.of_node, "spi");
1079 dev_err(&pdev->dev, "failed to get alias id, errno %d\n",
1085 sdd->port_id = pdev->id;
1090 if (!sdd->pdev->dev.of_node && (!sci->dma_tx || !sci->dma_rx)) {
1091 dev_warn(&pdev->dev, "Unable to get SPI tx/rx DMA data. Switching to poll mode\n");
1092 sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL;
1095 sdd->tx_dma.direction = DMA_MEM_TO_DEV;
1096 sdd->rx_dma.direction = DMA_DEV_TO_MEM;
1098 master->dev.of_node = pdev->dev.of_node;
1099 master->bus_num = sdd->port_id;
1100 master->setup = s3c64xx_spi_setup;
1101 master->cleanup = s3c64xx_spi_cleanup;
1102 master->prepare_transfer_hardware = s3c64xx_spi_prepare_transfer;
1103 master->prepare_message = s3c64xx_spi_prepare_message;
1104 master->transfer_one = s3c64xx_spi_transfer_one;
1105 master->unprepare_transfer_hardware = s3c64xx_spi_unprepare_transfer;
1106 master->num_chipselect = sci->num_cs;
1107 master->dma_alignment = 8;
1108 master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) |
1110 /* the spi->mode bits understood by this driver: */
1111 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
1112 master->auto_runtime_pm = true;
1113 if (!is_polling(sdd))
1114 master->can_dma = s3c64xx_spi_can_dma;
1116 sdd->regs = devm_ioremap_resource(&pdev->dev, mem_res);
1117 if (IS_ERR(sdd->regs)) {
1118 ret = PTR_ERR(sdd->regs);
1122 if (sci->cfg_gpio && sci->cfg_gpio()) {
1123 dev_err(&pdev->dev, "Unable to config gpio\n");
1129 sdd->clk = devm_clk_get(&pdev->dev, "spi");
1130 if (IS_ERR(sdd->clk)) {
1131 dev_err(&pdev->dev, "Unable to acquire clock 'spi'\n");
1132 ret = PTR_ERR(sdd->clk);
1136 if (clk_prepare_enable(sdd->clk)) {
1137 dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n");
1142 sprintf(clk_name, "spi_busclk%d", sci->src_clk_nr);
1143 sdd->src_clk = devm_clk_get(&pdev->dev, clk_name);
1144 if (IS_ERR(sdd->src_clk)) {
1146 "Unable to acquire clock '%s'\n", clk_name);
1147 ret = PTR_ERR(sdd->src_clk);
1151 if (clk_prepare_enable(sdd->src_clk)) {
1152 dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name);
1157 pm_runtime_set_autosuspend_delay(&pdev->dev, AUTOSUSPEND_TIMEOUT);
1158 pm_runtime_use_autosuspend(&pdev->dev);
1159 pm_runtime_set_active(&pdev->dev);
1160 pm_runtime_enable(&pdev->dev);
1161 pm_runtime_get_sync(&pdev->dev);
1163 /* Setup Deufult Mode */
1164 s3c64xx_spi_hwinit(sdd, sdd->port_id);
1166 spin_lock_init(&sdd->lock);
1167 init_completion(&sdd->xfer_completion);
1169 ret = devm_request_irq(&pdev->dev, irq, s3c64xx_spi_irq, 0,
1170 "spi-s3c64xx", sdd);
1172 dev_err(&pdev->dev, "Failed to request IRQ %d: %d\n",
1177 writel(S3C64XX_SPI_INT_RX_OVERRUN_EN | S3C64XX_SPI_INT_RX_UNDERRUN_EN |
1178 S3C64XX_SPI_INT_TX_OVERRUN_EN | S3C64XX_SPI_INT_TX_UNDERRUN_EN,
1179 sdd->regs + S3C64XX_SPI_INT_EN);
1181 ret = devm_spi_register_master(&pdev->dev, master);
1183 dev_err(&pdev->dev, "cannot register SPI master: %d\n", ret);
1187 dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n",
1188 sdd->port_id, master->num_chipselect);
1189 dev_dbg(&pdev->dev, "\tIOmem=[%pR]\tFIFO %dbytes\tDMA=[Rx-%p, Tx-%p]\n",
1190 mem_res, (FIFO_LVL_MASK(sdd) >> 1) + 1,
1191 sci->dma_rx, sci->dma_tx);
1193 pm_runtime_mark_last_busy(&pdev->dev);
1194 pm_runtime_put_autosuspend(&pdev->dev);
1199 pm_runtime_put_noidle(&pdev->dev);
1200 pm_runtime_disable(&pdev->dev);
1201 pm_runtime_set_suspended(&pdev->dev);
1203 clk_disable_unprepare(sdd->src_clk);
1205 clk_disable_unprepare(sdd->clk);
1207 spi_master_put(master);
1212 static int s3c64xx_spi_remove(struct platform_device *pdev)
1214 struct spi_master *master = spi_master_get(platform_get_drvdata(pdev));
1215 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1217 pm_runtime_get_sync(&pdev->dev);
1219 writel(0, sdd->regs + S3C64XX_SPI_INT_EN);
1221 clk_disable_unprepare(sdd->src_clk);
1223 clk_disable_unprepare(sdd->clk);
1225 pm_runtime_put_noidle(&pdev->dev);
1226 pm_runtime_disable(&pdev->dev);
1227 pm_runtime_set_suspended(&pdev->dev);
1232 #ifdef CONFIG_PM_SLEEP
1233 static int s3c64xx_spi_suspend(struct device *dev)
1235 struct spi_master *master = dev_get_drvdata(dev);
1236 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1238 int ret = spi_master_suspend(master);
1242 ret = pm_runtime_force_suspend(dev);
1246 sdd->cur_speed = 0; /* Output Clock is stopped */
1251 static int s3c64xx_spi_resume(struct device *dev)
1253 struct spi_master *master = dev_get_drvdata(dev);
1254 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1255 struct s3c64xx_spi_info *sci = sdd->cntrlr_info;
1261 ret = pm_runtime_force_resume(dev);
1265 s3c64xx_spi_hwinit(sdd, sdd->port_id);
1267 return spi_master_resume(master);
1269 #endif /* CONFIG_PM_SLEEP */
1272 static int s3c64xx_spi_runtime_suspend(struct device *dev)
1274 struct spi_master *master = dev_get_drvdata(dev);
1275 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1277 clk_disable_unprepare(sdd->clk);
1278 clk_disable_unprepare(sdd->src_clk);
1283 static int s3c64xx_spi_runtime_resume(struct device *dev)
1285 struct spi_master *master = dev_get_drvdata(dev);
1286 struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
1289 ret = clk_prepare_enable(sdd->src_clk);
1293 ret = clk_prepare_enable(sdd->clk);
1295 clk_disable_unprepare(sdd->src_clk);
1301 #endif /* CONFIG_PM */
1303 static const struct dev_pm_ops s3c64xx_spi_pm = {
1304 SET_SYSTEM_SLEEP_PM_OPS(s3c64xx_spi_suspend, s3c64xx_spi_resume)
1305 SET_RUNTIME_PM_OPS(s3c64xx_spi_runtime_suspend,
1306 s3c64xx_spi_runtime_resume, NULL)
1309 static struct s3c64xx_spi_port_config s3c2443_spi_port_config = {
1310 .fifo_lvl_mask = { 0x7f },
1311 .rx_lvl_offset = 13,
1316 static struct s3c64xx_spi_port_config s3c6410_spi_port_config = {
1317 .fifo_lvl_mask = { 0x7f, 0x7F },
1318 .rx_lvl_offset = 13,
1322 static struct s3c64xx_spi_port_config s5pv210_spi_port_config = {
1323 .fifo_lvl_mask = { 0x1ff, 0x7F },
1324 .rx_lvl_offset = 15,
1329 static struct s3c64xx_spi_port_config exynos4_spi_port_config = {
1330 .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F },
1331 .rx_lvl_offset = 15,
1334 .clk_from_cmu = true,
1337 static struct s3c64xx_spi_port_config exynos5440_spi_port_config = {
1338 .fifo_lvl_mask = { 0x1ff },
1339 .rx_lvl_offset = 15,
1342 .clk_from_cmu = true,
1343 .quirks = S3C64XX_SPI_QUIRK_POLL,
1346 static struct s3c64xx_spi_port_config exynos7_spi_port_config = {
1347 .fifo_lvl_mask = { 0x1ff, 0x7F, 0x7F, 0x7F, 0x7F, 0x1ff},
1348 .rx_lvl_offset = 15,
1351 .clk_from_cmu = true,
1352 .quirks = S3C64XX_SPI_QUIRK_CS_AUTO,
1355 static const struct platform_device_id s3c64xx_spi_driver_ids[] = {
1357 .name = "s3c2443-spi",
1358 .driver_data = (kernel_ulong_t)&s3c2443_spi_port_config,
1360 .name = "s3c6410-spi",
1361 .driver_data = (kernel_ulong_t)&s3c6410_spi_port_config,
1366 static const struct of_device_id s3c64xx_spi_dt_match[] = {
1367 { .compatible = "samsung,s3c2443-spi",
1368 .data = (void *)&s3c2443_spi_port_config,
1370 { .compatible = "samsung,s3c6410-spi",
1371 .data = (void *)&s3c6410_spi_port_config,
1373 { .compatible = "samsung,s5pv210-spi",
1374 .data = (void *)&s5pv210_spi_port_config,
1376 { .compatible = "samsung,exynos4210-spi",
1377 .data = (void *)&exynos4_spi_port_config,
1379 { .compatible = "samsung,exynos5440-spi",
1380 .data = (void *)&exynos5440_spi_port_config,
1382 { .compatible = "samsung,exynos7-spi",
1383 .data = (void *)&exynos7_spi_port_config,
1387 MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match);
1389 static struct platform_driver s3c64xx_spi_driver = {
1391 .name = "s3c64xx-spi",
1392 .pm = &s3c64xx_spi_pm,
1393 .of_match_table = of_match_ptr(s3c64xx_spi_dt_match),
1395 .probe = s3c64xx_spi_probe,
1396 .remove = s3c64xx_spi_remove,
1397 .id_table = s3c64xx_spi_driver_ids,
1399 MODULE_ALIAS("platform:s3c64xx-spi");
1401 module_platform_driver(s3c64xx_spi_driver);
1403 MODULE_AUTHOR("Jaswinder Singh <jassi.brar@samsung.com>");
1404 MODULE_DESCRIPTION("S3C64XX SPI Controller Driver");
1405 MODULE_LICENSE("GPL");