2 * SuperH MSIOF SPI Master Interface
4 * Copyright (c) 2009 Magnus Damm
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
12 #include <linux/bitmap.h>
13 #include <linux/clk.h>
14 #include <linux/completion.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/interrupt.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
23 #include <linux/of_device.h>
24 #include <linux/platform_device.h>
25 #include <linux/pm_runtime.h>
27 #include <linux/spi/sh_msiof.h>
28 #include <linux/spi/spi.h>
30 #include <asm/unaligned.h>
33 struct sh_msiof_chipdata {
39 struct sh_msiof_spi_priv {
40 void __iomem *mapbase;
42 struct platform_device *pdev;
43 const struct sh_msiof_chipdata *chipdata;
44 struct sh_msiof_spi_info *info;
45 struct completion done;
50 #define TMDR1 0x00 /* Transmit Mode Register 1 */
51 #define TMDR2 0x04 /* Transmit Mode Register 2 */
52 #define TMDR3 0x08 /* Transmit Mode Register 3 */
53 #define RMDR1 0x10 /* Receive Mode Register 1 */
54 #define RMDR2 0x14 /* Receive Mode Register 2 */
55 #define RMDR3 0x18 /* Receive Mode Register 3 */
56 #define TSCR 0x20 /* Transmit Clock Select Register */
57 #define RSCR 0x22 /* Receive Clock Select Register (SH, A1, APE6) */
58 #define CTR 0x28 /* Control Register */
59 #define FCTR 0x30 /* FIFO Control Register */
60 #define STR 0x40 /* Status Register */
61 #define IER 0x44 /* Interrupt Enable Register */
62 #define TDR1 0x48 /* Transmit Control Data Register 1 (SH, A1) */
63 #define TDR2 0x4c /* Transmit Control Data Register 2 (SH, A1) */
64 #define TFDR 0x50 /* Transmit FIFO Data Register */
65 #define RDR1 0x58 /* Receive Control Data Register 1 (SH, A1) */
66 #define RDR2 0x5c /* Receive Control Data Register 2 (SH, A1) */
67 #define RFDR 0x60 /* Receive FIFO Data Register */
70 #define MDR1_TRMD 0x80000000 /* Transfer Mode (1 = Master mode) */
71 #define MDR1_SYNCMD_MASK 0x30000000 /* SYNC Mode */
72 #define MDR1_SYNCMD_SPI 0x20000000 /* Level mode/SPI */
73 #define MDR1_SYNCMD_LR 0x30000000 /* L/R mode */
74 #define MDR1_SYNCAC_SHIFT 25 /* Sync Polarity (1 = Active-low) */
75 #define MDR1_BITLSB_SHIFT 24 /* MSB/LSB First (1 = LSB first) */
76 #define MDR1_FLD_MASK 0x000000c0 /* Frame Sync Signal Interval (0-3) */
77 #define MDR1_FLD_SHIFT 2
78 #define MDR1_XXSTP 0x00000001 /* Transmission/Reception Stop on FIFO */
80 #define TMDR1_PCON 0x40000000 /* Transfer Signal Connection */
83 #define MDR2_BITLEN1(i) (((i) - 1) << 24) /* Data Size (8-32 bits) */
84 #define MDR2_WDLEN1(i) (((i) - 1) << 16) /* Word Count (1-64/256 (SH, A1))) */
85 #define MDR2_GRPMASK1 0x00000001 /* Group Output Mask 1 (SH, A1) */
88 #define SCR_BRPS_MASK 0x1f00 /* Prescaler Setting (1-32) */
89 #define SCR_BRPS(i) (((i) - 1) << 8)
90 #define SCR_BRDV_MASK 0x0007 /* Baud Rate Generator's Division Ratio */
91 #define SCR_BRDV_DIV_2 0x0000
92 #define SCR_BRDV_DIV_4 0x0001
93 #define SCR_BRDV_DIV_8 0x0002
94 #define SCR_BRDV_DIV_16 0x0003
95 #define SCR_BRDV_DIV_32 0x0004
96 #define SCR_BRDV_DIV_1 0x0007
99 #define CTR_TSCKIZ_MASK 0xc0000000 /* Transmit Clock I/O Polarity Select */
100 #define CTR_TSCKIZ_SCK 0x80000000 /* Disable SCK when TX disabled */
101 #define CTR_TSCKIZ_POL_SHIFT 30 /* Transmit Clock Polarity */
102 #define CTR_RSCKIZ_MASK 0x30000000 /* Receive Clock Polarity Select */
103 #define CTR_RSCKIZ_SCK 0x20000000 /* Must match CTR_TSCKIZ_SCK */
104 #define CTR_RSCKIZ_POL_SHIFT 28 /* Receive Clock Polarity */
105 #define CTR_TEDG_SHIFT 27 /* Transmit Timing (1 = falling edge) */
106 #define CTR_REDG_SHIFT 26 /* Receive Timing (1 = falling edge) */
107 #define CTR_TXDIZ_MASK 0x00c00000 /* Pin Output When TX is Disabled */
108 #define CTR_TXDIZ_LOW 0x00000000 /* 0 */
109 #define CTR_TXDIZ_HIGH 0x00400000 /* 1 */
110 #define CTR_TXDIZ_HIZ 0x00800000 /* High-impedance */
111 #define CTR_TSCKE 0x00008000 /* Transmit Serial Clock Output Enable */
112 #define CTR_TFSE 0x00004000 /* Transmit Frame Sync Signal Output Enable */
113 #define CTR_TXE 0x00000200 /* Transmit Enable */
114 #define CTR_RXE 0x00000100 /* Receive Enable */
117 #define STR_TEOF 0x00800000 /* Frame Transmission End */
118 #define STR_REOF 0x00000080 /* Frame Reception End */
121 static u32 sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
126 return ioread16(p->mapbase + reg_offs);
128 return ioread32(p->mapbase + reg_offs);
132 static void sh_msiof_write(struct sh_msiof_spi_priv *p, int reg_offs,
138 iowrite16(value, p->mapbase + reg_offs);
141 iowrite32(value, p->mapbase + reg_offs);
146 static int sh_msiof_modify_ctr_wait(struct sh_msiof_spi_priv *p,
149 u32 mask = clr | set;
153 data = sh_msiof_read(p, CTR);
156 sh_msiof_write(p, CTR, data);
158 for (k = 100; k > 0; k--) {
159 if ((sh_msiof_read(p, CTR) & mask) == set)
165 return k > 0 ? 0 : -ETIMEDOUT;
168 static irqreturn_t sh_msiof_spi_irq(int irq, void *data)
170 struct sh_msiof_spi_priv *p = data;
172 /* just disable the interrupt and wake up */
173 sh_msiof_write(p, IER, 0);
182 } const sh_msiof_spi_clk_table[] = {
183 { 1, SCR_BRPS( 1) | SCR_BRDV_DIV_1 },
184 { 2, SCR_BRPS( 1) | SCR_BRDV_DIV_2 },
185 { 4, SCR_BRPS( 1) | SCR_BRDV_DIV_4 },
186 { 8, SCR_BRPS( 1) | SCR_BRDV_DIV_8 },
187 { 16, SCR_BRPS( 1) | SCR_BRDV_DIV_16 },
188 { 32, SCR_BRPS( 1) | SCR_BRDV_DIV_32 },
189 { 64, SCR_BRPS(32) | SCR_BRDV_DIV_2 },
190 { 128, SCR_BRPS(32) | SCR_BRDV_DIV_4 },
191 { 256, SCR_BRPS(32) | SCR_BRDV_DIV_8 },
192 { 512, SCR_BRPS(32) | SCR_BRDV_DIV_16 },
193 { 1024, SCR_BRPS(32) | SCR_BRDV_DIV_32 },
196 static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
197 unsigned long parent_rate, u32 spi_hz)
199 unsigned long div = 1024;
202 if (!WARN_ON(!spi_hz || !parent_rate))
203 div = DIV_ROUND_UP(parent_rate, spi_hz);
205 /* TODO: make more fine grained */
207 for (k = 0; k < ARRAY_SIZE(sh_msiof_spi_clk_table); k++) {
208 if (sh_msiof_spi_clk_table[k].div >= div)
212 k = min_t(int, k, ARRAY_SIZE(sh_msiof_spi_clk_table) - 1);
214 sh_msiof_write(p, TSCR, sh_msiof_spi_clk_table[k].scr);
215 if (!(p->chipdata->master_flags & SPI_MASTER_MUST_TX))
216 sh_msiof_write(p, RSCR, sh_msiof_spi_clk_table[k].scr);
219 static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p,
221 u32 tx_hi_z, u32 lsb_first, u32 cs_high)
227 * CPOL CPHA TSCKIZ RSCKIZ TEDG REDG
233 sh_msiof_write(p, FCTR, 0);
235 tmp = MDR1_SYNCMD_SPI | 1 << MDR1_FLD_SHIFT | MDR1_XXSTP;
236 tmp |= !cs_high << MDR1_SYNCAC_SHIFT;
237 tmp |= lsb_first << MDR1_BITLSB_SHIFT;
238 sh_msiof_write(p, TMDR1, tmp | MDR1_TRMD | TMDR1_PCON);
239 if (p->chipdata->master_flags & SPI_MASTER_MUST_TX) {
240 /* These bits are reserved if RX needs TX */
243 sh_msiof_write(p, RMDR1, tmp);
246 tmp |= CTR_TSCKIZ_SCK | cpol << CTR_TSCKIZ_POL_SHIFT;
247 tmp |= CTR_RSCKIZ_SCK | cpol << CTR_RSCKIZ_POL_SHIFT;
251 tmp |= edge << CTR_TEDG_SHIFT;
252 tmp |= edge << CTR_REDG_SHIFT;
253 tmp |= tx_hi_z ? CTR_TXDIZ_HIZ : CTR_TXDIZ_LOW;
254 sh_msiof_write(p, CTR, tmp);
257 static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p,
258 const void *tx_buf, void *rx_buf,
261 u32 dr2 = MDR2_BITLEN1(bits) | MDR2_WDLEN1(words);
263 if (tx_buf || (p->chipdata->master_flags & SPI_MASTER_MUST_TX))
264 sh_msiof_write(p, TMDR2, dr2);
266 sh_msiof_write(p, TMDR2, dr2 | MDR2_GRPMASK1);
269 sh_msiof_write(p, RMDR2, dr2);
271 sh_msiof_write(p, IER, STR_TEOF | STR_REOF);
274 static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p)
276 sh_msiof_write(p, STR, sh_msiof_read(p, STR));
279 static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,
280 const void *tx_buf, int words, int fs)
282 const u8 *buf_8 = tx_buf;
285 for (k = 0; k < words; k++)
286 sh_msiof_write(p, TFDR, buf_8[k] << fs);
289 static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p,
290 const void *tx_buf, int words, int fs)
292 const u16 *buf_16 = tx_buf;
295 for (k = 0; k < words; k++)
296 sh_msiof_write(p, TFDR, buf_16[k] << fs);
299 static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p,
300 const void *tx_buf, int words, int fs)
302 const u16 *buf_16 = tx_buf;
305 for (k = 0; k < words; k++)
306 sh_msiof_write(p, TFDR, get_unaligned(&buf_16[k]) << fs);
309 static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p,
310 const void *tx_buf, int words, int fs)
312 const u32 *buf_32 = tx_buf;
315 for (k = 0; k < words; k++)
316 sh_msiof_write(p, TFDR, buf_32[k] << fs);
319 static void sh_msiof_spi_write_fifo_32u(struct sh_msiof_spi_priv *p,
320 const void *tx_buf, int words, int fs)
322 const u32 *buf_32 = tx_buf;
325 for (k = 0; k < words; k++)
326 sh_msiof_write(p, TFDR, get_unaligned(&buf_32[k]) << fs);
329 static void sh_msiof_spi_write_fifo_s32(struct sh_msiof_spi_priv *p,
330 const void *tx_buf, int words, int fs)
332 const u32 *buf_32 = tx_buf;
335 for (k = 0; k < words; k++)
336 sh_msiof_write(p, TFDR, swab32(buf_32[k] << fs));
339 static void sh_msiof_spi_write_fifo_s32u(struct sh_msiof_spi_priv *p,
340 const void *tx_buf, int words, int fs)
342 const u32 *buf_32 = tx_buf;
345 for (k = 0; k < words; k++)
346 sh_msiof_write(p, TFDR, swab32(get_unaligned(&buf_32[k]) << fs));
349 static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p,
350 void *rx_buf, int words, int fs)
355 for (k = 0; k < words; k++)
356 buf_8[k] = sh_msiof_read(p, RFDR) >> fs;
359 static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p,
360 void *rx_buf, int words, int fs)
362 u16 *buf_16 = rx_buf;
365 for (k = 0; k < words; k++)
366 buf_16[k] = sh_msiof_read(p, RFDR) >> fs;
369 static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p,
370 void *rx_buf, int words, int fs)
372 u16 *buf_16 = rx_buf;
375 for (k = 0; k < words; k++)
376 put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_16[k]);
379 static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p,
380 void *rx_buf, int words, int fs)
382 u32 *buf_32 = rx_buf;
385 for (k = 0; k < words; k++)
386 buf_32[k] = sh_msiof_read(p, RFDR) >> fs;
389 static void sh_msiof_spi_read_fifo_32u(struct sh_msiof_spi_priv *p,
390 void *rx_buf, int words, int fs)
392 u32 *buf_32 = rx_buf;
395 for (k = 0; k < words; k++)
396 put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_32[k]);
399 static void sh_msiof_spi_read_fifo_s32(struct sh_msiof_spi_priv *p,
400 void *rx_buf, int words, int fs)
402 u32 *buf_32 = rx_buf;
405 for (k = 0; k < words; k++)
406 buf_32[k] = swab32(sh_msiof_read(p, RFDR) >> fs);
409 static void sh_msiof_spi_read_fifo_s32u(struct sh_msiof_spi_priv *p,
410 void *rx_buf, int words, int fs)
412 u32 *buf_32 = rx_buf;
415 for (k = 0; k < words; k++)
416 put_unaligned(swab32(sh_msiof_read(p, RFDR) >> fs), &buf_32[k]);
419 static int sh_msiof_spi_bits(struct spi_device *spi, struct spi_transfer *t)
423 bits = t ? t->bits_per_word : 0;
425 bits = spi->bits_per_word;
429 static u32 sh_msiof_spi_hz(struct spi_device *spi, struct spi_transfer *t)
433 hz = t ? t->speed_hz : 0;
435 hz = spi->max_speed_hz;
439 static int sh_msiof_spi_setup(struct spi_device *spi)
441 struct device_node *np = spi->master->dev.of_node;
442 struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master);
446 * Use spi->controller_data for CS (same strategy as spi_gpio),
447 * if any. otherwise let HW control CS
449 spi->cs_gpio = (uintptr_t)spi->controller_data;
452 /* Configure pins before deasserting CS */
453 sh_msiof_spi_set_pin_regs(p, !!(spi->mode & SPI_CPOL),
454 !!(spi->mode & SPI_CPHA),
455 !!(spi->mode & SPI_3WIRE),
456 !!(spi->mode & SPI_LSB_FIRST),
457 !!(spi->mode & SPI_CS_HIGH));
459 if (spi->cs_gpio >= 0)
460 gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
465 static int sh_msiof_prepare_message(struct spi_master *master,
466 struct spi_message *msg)
468 struct sh_msiof_spi_priv *p = spi_master_get_devdata(master);
469 const struct spi_device *spi = msg->spi;
471 pm_runtime_get_sync(&p->pdev->dev);
474 /* Configure pins before asserting CS */
475 sh_msiof_spi_set_pin_regs(p, !!(spi->mode & SPI_CPOL),
476 !!(spi->mode & SPI_CPHA),
477 !!(spi->mode & SPI_3WIRE),
478 !!(spi->mode & SPI_LSB_FIRST),
479 !!(spi->mode & SPI_CS_HIGH));
483 static int sh_msiof_unprepare_message(struct spi_master *master,
484 struct spi_message *msg)
486 struct sh_msiof_spi_priv *p = spi_master_get_devdata(master);
489 pm_runtime_put(&p->pdev->dev);
493 static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p,
494 void (*tx_fifo)(struct sh_msiof_spi_priv *,
495 const void *, int, int),
496 void (*rx_fifo)(struct sh_msiof_spi_priv *,
498 const void *tx_buf, void *rx_buf,
504 /* limit maximum word transfer to rx/tx fifo size */
506 words = min_t(int, words, p->tx_fifo_size);
508 words = min_t(int, words, p->rx_fifo_size);
510 /* the fifo contents need shifting */
511 fifo_shift = 32 - bits;
513 /* setup msiof transfer mode registers */
514 sh_msiof_spi_set_mode_regs(p, tx_buf, rx_buf, bits, words);
518 tx_fifo(p, tx_buf, words, fifo_shift);
520 /* setup clock and rx/tx signals */
521 ret = sh_msiof_modify_ctr_wait(p, 0, CTR_TSCKE);
523 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_RXE);
524 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_TXE);
526 /* start by setting frame bit */
527 reinit_completion(&p->done);
528 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_TFSE);
530 dev_err(&p->pdev->dev, "failed to start hardware\n");
534 /* wait for tx fifo to be emptied / rx fifo to be filled */
535 wait_for_completion(&p->done);
539 rx_fifo(p, rx_buf, words, fifo_shift);
541 /* clear status bits */
542 sh_msiof_reset_str(p);
544 /* shut down frame, rx/tx and clock signals */
545 ret = sh_msiof_modify_ctr_wait(p, CTR_TFSE, 0);
546 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, CTR_TXE, 0);
548 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, CTR_RXE, 0);
549 ret = ret ? ret : sh_msiof_modify_ctr_wait(p, CTR_TSCKE, 0);
551 dev_err(&p->pdev->dev, "failed to shut down hardware\n");
558 sh_msiof_write(p, IER, 0);
562 static int sh_msiof_transfer_one(struct spi_master *master,
563 struct spi_device *spi,
564 struct spi_transfer *t)
566 struct sh_msiof_spi_priv *p = spi_master_get_devdata(master);
567 void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int);
568 void (*rx_fifo)(struct sh_msiof_spi_priv *, void *, int, int);
576 bits = sh_msiof_spi_bits(spi, t);
578 if (bits <= 8 && t->len > 15 && !(t->len & 3)) {
585 /* setup bytes per word and fifo read/write functions */
588 tx_fifo = sh_msiof_spi_write_fifo_8;
589 rx_fifo = sh_msiof_spi_read_fifo_8;
590 } else if (bits <= 16) {
592 if ((unsigned long)t->tx_buf & 0x01)
593 tx_fifo = sh_msiof_spi_write_fifo_16u;
595 tx_fifo = sh_msiof_spi_write_fifo_16;
597 if ((unsigned long)t->rx_buf & 0x01)
598 rx_fifo = sh_msiof_spi_read_fifo_16u;
600 rx_fifo = sh_msiof_spi_read_fifo_16;
603 if ((unsigned long)t->tx_buf & 0x03)
604 tx_fifo = sh_msiof_spi_write_fifo_s32u;
606 tx_fifo = sh_msiof_spi_write_fifo_s32;
608 if ((unsigned long)t->rx_buf & 0x03)
609 rx_fifo = sh_msiof_spi_read_fifo_s32u;
611 rx_fifo = sh_msiof_spi_read_fifo_s32;
614 if ((unsigned long)t->tx_buf & 0x03)
615 tx_fifo = sh_msiof_spi_write_fifo_32u;
617 tx_fifo = sh_msiof_spi_write_fifo_32;
619 if ((unsigned long)t->rx_buf & 0x03)
620 rx_fifo = sh_msiof_spi_read_fifo_32u;
622 rx_fifo = sh_msiof_spi_read_fifo_32;
625 /* setup clocks (clock already enabled in chipselect()) */
626 sh_msiof_spi_set_clk_regs(p, clk_get_rate(p->clk),
627 sh_msiof_spi_hz(spi, t));
629 /* transfer in fifo sized chunks */
630 words = t->len / bytes_per_word;
633 while (bytes_done < t->len) {
634 void *rx_buf = t->rx_buf ? t->rx_buf + bytes_done : NULL;
635 const void *tx_buf = t->tx_buf ? t->tx_buf + bytes_done : NULL;
636 n = sh_msiof_spi_txrx_once(p, tx_fifo, rx_fifo,
643 bytes_done += n * bytes_per_word;
650 static const struct sh_msiof_chipdata sh_data = {
656 static const struct sh_msiof_chipdata r8a779x_data = {
659 .master_flags = SPI_MASTER_MUST_TX,
662 static const struct of_device_id sh_msiof_match[] = {
663 { .compatible = "renesas,sh-msiof", .data = &sh_data },
664 { .compatible = "renesas,sh-mobile-msiof", .data = &sh_data },
665 { .compatible = "renesas,msiof-r8a7790", .data = &r8a779x_data },
666 { .compatible = "renesas,msiof-r8a7791", .data = &r8a779x_data },
669 MODULE_DEVICE_TABLE(of, sh_msiof_match);
672 static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
674 struct sh_msiof_spi_info *info;
675 struct device_node *np = dev->of_node;
678 info = devm_kzalloc(dev, sizeof(struct sh_msiof_spi_info), GFP_KERNEL);
680 dev_err(dev, "failed to allocate setup data\n");
684 /* Parse the MSIOF properties */
685 of_property_read_u32(np, "num-cs", &num_cs);
686 of_property_read_u32(np, "renesas,tx-fifo-size",
687 &info->tx_fifo_override);
688 of_property_read_u32(np, "renesas,rx-fifo-size",
689 &info->rx_fifo_override);
691 info->num_chipselect = num_cs;
696 static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev)
702 static int sh_msiof_spi_probe(struct platform_device *pdev)
705 struct spi_master *master;
706 const struct of_device_id *of_id;
707 struct sh_msiof_spi_priv *p;
711 master = spi_alloc_master(&pdev->dev, sizeof(struct sh_msiof_spi_priv));
712 if (master == NULL) {
713 dev_err(&pdev->dev, "failed to allocate spi master\n");
717 p = spi_master_get_devdata(master);
719 platform_set_drvdata(pdev, p);
721 of_id = of_match_device(sh_msiof_match, &pdev->dev);
723 p->chipdata = of_id->data;
724 p->info = sh_msiof_spi_parse_dt(&pdev->dev);
726 p->chipdata = (const void *)pdev->id_entry->driver_data;
727 p->info = dev_get_platdata(&pdev->dev);
731 dev_err(&pdev->dev, "failed to obtain device info\n");
736 init_completion(&p->done);
738 p->clk = devm_clk_get(&pdev->dev, NULL);
739 if (IS_ERR(p->clk)) {
740 dev_err(&pdev->dev, "cannot get clock\n");
741 ret = PTR_ERR(p->clk);
745 i = platform_get_irq(pdev, 0);
747 dev_err(&pdev->dev, "cannot get platform IRQ\n");
752 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
753 p->mapbase = devm_ioremap_resource(&pdev->dev, r);
754 if (IS_ERR(p->mapbase)) {
755 ret = PTR_ERR(p->mapbase);
759 ret = devm_request_irq(&pdev->dev, i, sh_msiof_spi_irq, 0,
760 dev_name(&pdev->dev), p);
762 dev_err(&pdev->dev, "unable to request irq\n");
766 ret = clk_prepare(p->clk);
768 dev_err(&pdev->dev, "unable to prepare clock\n");
773 pm_runtime_enable(&pdev->dev);
775 /* Platform data may override FIFO sizes */
776 p->tx_fifo_size = p->chipdata->tx_fifo_size;
777 p->rx_fifo_size = p->chipdata->rx_fifo_size;
778 if (p->info->tx_fifo_override)
779 p->tx_fifo_size = p->info->tx_fifo_override;
780 if (p->info->rx_fifo_override)
781 p->rx_fifo_size = p->info->rx_fifo_override;
783 /* init master code */
784 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
785 master->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE;
786 master->flags = p->chipdata->master_flags;
787 master->bus_num = pdev->id;
788 master->dev.of_node = pdev->dev.of_node;
789 master->num_chipselect = p->info->num_chipselect;
790 master->setup = sh_msiof_spi_setup;
791 master->prepare_message = sh_msiof_prepare_message;
792 master->unprepare_message = sh_msiof_unprepare_message;
793 master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
794 master->transfer_one = sh_msiof_transfer_one;
796 ret = devm_spi_register_master(&pdev->dev, master);
798 dev_err(&pdev->dev, "spi_register_master error.\n");
805 pm_runtime_disable(&pdev->dev);
806 clk_unprepare(p->clk);
808 spi_master_put(master);
812 static int sh_msiof_spi_remove(struct platform_device *pdev)
814 struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev);
816 pm_runtime_disable(&pdev->dev);
817 clk_unprepare(p->clk);
821 static struct platform_device_id spi_driver_ids[] = {
822 { "spi_sh_msiof", (kernel_ulong_t)&sh_data },
823 { "spi_r8a7790_msiof", (kernel_ulong_t)&r8a779x_data },
824 { "spi_r8a7791_msiof", (kernel_ulong_t)&r8a779x_data },
827 MODULE_DEVICE_TABLE(platform, spi_driver_ids);
829 static struct platform_driver sh_msiof_spi_drv = {
830 .probe = sh_msiof_spi_probe,
831 .remove = sh_msiof_spi_remove,
832 .id_table = spi_driver_ids,
834 .name = "spi_sh_msiof",
835 .owner = THIS_MODULE,
836 .of_match_table = of_match_ptr(sh_msiof_match),
839 module_platform_driver(sh_msiof_spi_drv);
841 MODULE_DESCRIPTION("SuperH MSIOF SPI Master Interface Driver");
842 MODULE_AUTHOR("Magnus Damm");
843 MODULE_LICENSE("GPL v2");
844 MODULE_ALIAS("platform:spi_sh_msiof");