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Commit | Line | Data |
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b5f3294f SH |
1 | /* |
2 | * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. | |
3 | * Copyright (C) 2008 Juergen Beisert | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version 2 | |
8 | * of the License, or (at your option) any later version. | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the | |
16 | * Free Software Foundation | |
17 | * 51 Franklin Street, Fifth Floor | |
18 | * Boston, MA 02110-1301, USA. | |
19 | */ | |
20 | ||
21 | #include <linux/clk.h> | |
22 | #include <linux/completion.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/gpio.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/io.h> | |
29 | #include <linux/irq.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/platform_device.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
b5f3294f SH |
34 | #include <linux/spi/spi.h> |
35 | #include <linux/spi/spi_bitbang.h> | |
36 | #include <linux/types.h> | |
22a85e4c SG |
37 | #include <linux/of.h> |
38 | #include <linux/of_device.h> | |
39 | #include <linux/of_gpio.h> | |
b5f3294f | 40 | |
82906b13 | 41 | #include <linux/platform_data/spi-imx.h> |
b5f3294f SH |
42 | |
43 | #define DRIVER_NAME "spi_imx" | |
44 | ||
45 | #define MXC_CSPIRXDATA 0x00 | |
46 | #define MXC_CSPITXDATA 0x04 | |
47 | #define MXC_CSPICTRL 0x08 | |
48 | #define MXC_CSPIINT 0x0c | |
49 | #define MXC_RESET 0x1c | |
50 | ||
51 | /* generic defines to abstract from the different register layouts */ | |
52 | #define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */ | |
53 | #define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */ | |
54 | ||
6cdeb002 | 55 | struct spi_imx_config { |
b5f3294f SH |
56 | unsigned int speed_hz; |
57 | unsigned int bpw; | |
58 | unsigned int mode; | |
3b2aa89e | 59 | u8 cs; |
b5f3294f SH |
60 | }; |
61 | ||
f4ba6315 | 62 | enum spi_imx_devtype { |
04ee5854 SG |
63 | IMX1_CSPI, |
64 | IMX21_CSPI, | |
65 | IMX27_CSPI, | |
66 | IMX31_CSPI, | |
67 | IMX35_CSPI, /* CSPI on all i.mx except above */ | |
68 | IMX51_ECSPI, /* ECSPI on i.mx51 and later */ | |
f4ba6315 UKK |
69 | }; |
70 | ||
71 | struct spi_imx_data; | |
72 | ||
73 | struct spi_imx_devtype_data { | |
74 | void (*intctrl)(struct spi_imx_data *, int); | |
75 | int (*config)(struct spi_imx_data *, struct spi_imx_config *); | |
76 | void (*trigger)(struct spi_imx_data *); | |
77 | int (*rx_available)(struct spi_imx_data *); | |
1723e66b | 78 | void (*reset)(struct spi_imx_data *); |
04ee5854 | 79 | enum spi_imx_devtype devtype; |
f4ba6315 UKK |
80 | }; |
81 | ||
6cdeb002 | 82 | struct spi_imx_data { |
b5f3294f SH |
83 | struct spi_bitbang bitbang; |
84 | ||
85 | struct completion xfer_done; | |
cc4d22ae | 86 | void __iomem *base; |
b5f3294f | 87 | int irq; |
aa29d840 SH |
88 | struct clk *clk_per; |
89 | struct clk *clk_ipg; | |
b5f3294f | 90 | unsigned long spi_clk; |
b5f3294f SH |
91 | |
92 | unsigned int count; | |
6cdeb002 UKK |
93 | void (*tx)(struct spi_imx_data *); |
94 | void (*rx)(struct spi_imx_data *); | |
b5f3294f SH |
95 | void *rx_buf; |
96 | const void *tx_buf; | |
97 | unsigned int txfifo; /* number of words pushed in tx FIFO */ | |
98 | ||
80023cb3 | 99 | const struct spi_imx_devtype_data *devtype_data; |
c2387cb9 | 100 | int chipselect[0]; |
b5f3294f SH |
101 | }; |
102 | ||
04ee5854 SG |
103 | static inline int is_imx27_cspi(struct spi_imx_data *d) |
104 | { | |
105 | return d->devtype_data->devtype == IMX27_CSPI; | |
106 | } | |
107 | ||
108 | static inline int is_imx35_cspi(struct spi_imx_data *d) | |
109 | { | |
110 | return d->devtype_data->devtype == IMX35_CSPI; | |
111 | } | |
112 | ||
113 | static inline unsigned spi_imx_get_fifosize(struct spi_imx_data *d) | |
114 | { | |
115 | return (d->devtype_data->devtype == IMX51_ECSPI) ? 64 : 8; | |
116 | } | |
117 | ||
b5f3294f | 118 | #define MXC_SPI_BUF_RX(type) \ |
6cdeb002 | 119 | static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx) \ |
b5f3294f | 120 | { \ |
6cdeb002 | 121 | unsigned int val = readl(spi_imx->base + MXC_CSPIRXDATA); \ |
b5f3294f | 122 | \ |
6cdeb002 UKK |
123 | if (spi_imx->rx_buf) { \ |
124 | *(type *)spi_imx->rx_buf = val; \ | |
125 | spi_imx->rx_buf += sizeof(type); \ | |
b5f3294f SH |
126 | } \ |
127 | } | |
128 | ||
129 | #define MXC_SPI_BUF_TX(type) \ | |
6cdeb002 | 130 | static void spi_imx_buf_tx_##type(struct spi_imx_data *spi_imx) \ |
b5f3294f SH |
131 | { \ |
132 | type val = 0; \ | |
133 | \ | |
6cdeb002 UKK |
134 | if (spi_imx->tx_buf) { \ |
135 | val = *(type *)spi_imx->tx_buf; \ | |
136 | spi_imx->tx_buf += sizeof(type); \ | |
b5f3294f SH |
137 | } \ |
138 | \ | |
6cdeb002 | 139 | spi_imx->count -= sizeof(type); \ |
b5f3294f | 140 | \ |
6cdeb002 | 141 | writel(val, spi_imx->base + MXC_CSPITXDATA); \ |
b5f3294f SH |
142 | } |
143 | ||
144 | MXC_SPI_BUF_RX(u8) | |
145 | MXC_SPI_BUF_TX(u8) | |
146 | MXC_SPI_BUF_RX(u16) | |
147 | MXC_SPI_BUF_TX(u16) | |
148 | MXC_SPI_BUF_RX(u32) | |
149 | MXC_SPI_BUF_TX(u32) | |
150 | ||
151 | /* First entry is reserved, second entry is valid only if SDHC_SPIEN is set | |
152 | * (which is currently not the case in this driver) | |
153 | */ | |
154 | static int mxc_clkdivs[] = {0, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, | |
155 | 256, 384, 512, 768, 1024}; | |
156 | ||
157 | /* MX21, MX27 */ | |
6cdeb002 | 158 | static unsigned int spi_imx_clkdiv_1(unsigned int fin, |
04ee5854 | 159 | unsigned int fspi, unsigned int max) |
b5f3294f | 160 | { |
04ee5854 | 161 | int i; |
b5f3294f SH |
162 | |
163 | for (i = 2; i < max; i++) | |
164 | if (fspi * mxc_clkdivs[i] >= fin) | |
165 | return i; | |
166 | ||
167 | return max; | |
168 | } | |
169 | ||
0b599603 | 170 | /* MX1, MX31, MX35, MX51 CSPI */ |
6cdeb002 | 171 | static unsigned int spi_imx_clkdiv_2(unsigned int fin, |
b5f3294f SH |
172 | unsigned int fspi) |
173 | { | |
174 | int i, div = 4; | |
175 | ||
176 | for (i = 0; i < 7; i++) { | |
177 | if (fspi * div >= fin) | |
178 | return i; | |
179 | div <<= 1; | |
180 | } | |
181 | ||
182 | return 7; | |
183 | } | |
184 | ||
66de757c SG |
185 | #define MX51_ECSPI_CTRL 0x08 |
186 | #define MX51_ECSPI_CTRL_ENABLE (1 << 0) | |
187 | #define MX51_ECSPI_CTRL_XCH (1 << 2) | |
188 | #define MX51_ECSPI_CTRL_MODE_MASK (0xf << 4) | |
189 | #define MX51_ECSPI_CTRL_POSTDIV_OFFSET 8 | |
190 | #define MX51_ECSPI_CTRL_PREDIV_OFFSET 12 | |
191 | #define MX51_ECSPI_CTRL_CS(cs) ((cs) << 18) | |
192 | #define MX51_ECSPI_CTRL_BL_OFFSET 20 | |
193 | ||
194 | #define MX51_ECSPI_CONFIG 0x0c | |
195 | #define MX51_ECSPI_CONFIG_SCLKPHA(cs) (1 << ((cs) + 0)) | |
196 | #define MX51_ECSPI_CONFIG_SCLKPOL(cs) (1 << ((cs) + 4)) | |
197 | #define MX51_ECSPI_CONFIG_SBBCTRL(cs) (1 << ((cs) + 8)) | |
198 | #define MX51_ECSPI_CONFIG_SSBPOL(cs) (1 << ((cs) + 12)) | |
c09b890b | 199 | #define MX51_ECSPI_CONFIG_SCLKCTL(cs) (1 << ((cs) + 20)) |
66de757c SG |
200 | |
201 | #define MX51_ECSPI_INT 0x10 | |
202 | #define MX51_ECSPI_INT_TEEN (1 << 0) | |
203 | #define MX51_ECSPI_INT_RREN (1 << 3) | |
204 | ||
205 | #define MX51_ECSPI_STAT 0x18 | |
206 | #define MX51_ECSPI_STAT_RR (1 << 3) | |
0b599603 UKK |
207 | |
208 | /* MX51 eCSPI */ | |
66de757c | 209 | static unsigned int mx51_ecspi_clkdiv(unsigned int fin, unsigned int fspi) |
0b599603 UKK |
210 | { |
211 | /* | |
212 | * there are two 4-bit dividers, the pre-divider divides by | |
213 | * $pre, the post-divider by 2^$post | |
214 | */ | |
215 | unsigned int pre, post; | |
216 | ||
217 | if (unlikely(fspi > fin)) | |
218 | return 0; | |
219 | ||
220 | post = fls(fin) - fls(fspi); | |
221 | if (fin > fspi << post) | |
222 | post++; | |
223 | ||
224 | /* now we have: (fin <= fspi << post) with post being minimal */ | |
225 | ||
226 | post = max(4U, post) - 4; | |
227 | if (unlikely(post > 0xf)) { | |
228 | pr_err("%s: cannot set clock freq: %u (base freq: %u)\n", | |
229 | __func__, fspi, fin); | |
230 | return 0xff; | |
231 | } | |
232 | ||
233 | pre = DIV_ROUND_UP(fin, fspi << post) - 1; | |
234 | ||
235 | pr_debug("%s: fin: %u, fspi: %u, post: %u, pre: %u\n", | |
236 | __func__, fin, fspi, post, pre); | |
66de757c SG |
237 | return (pre << MX51_ECSPI_CTRL_PREDIV_OFFSET) | |
238 | (post << MX51_ECSPI_CTRL_POSTDIV_OFFSET); | |
0b599603 UKK |
239 | } |
240 | ||
66de757c | 241 | static void __maybe_unused mx51_ecspi_intctrl(struct spi_imx_data *spi_imx, int enable) |
0b599603 UKK |
242 | { |
243 | unsigned val = 0; | |
244 | ||
245 | if (enable & MXC_INT_TE) | |
66de757c | 246 | val |= MX51_ECSPI_INT_TEEN; |
0b599603 UKK |
247 | |
248 | if (enable & MXC_INT_RR) | |
66de757c | 249 | val |= MX51_ECSPI_INT_RREN; |
0b599603 | 250 | |
66de757c | 251 | writel(val, spi_imx->base + MX51_ECSPI_INT); |
0b599603 UKK |
252 | } |
253 | ||
66de757c | 254 | static void __maybe_unused mx51_ecspi_trigger(struct spi_imx_data *spi_imx) |
0b599603 UKK |
255 | { |
256 | u32 reg; | |
257 | ||
66de757c SG |
258 | reg = readl(spi_imx->base + MX51_ECSPI_CTRL); |
259 | reg |= MX51_ECSPI_CTRL_XCH; | |
260 | writel(reg, spi_imx->base + MX51_ECSPI_CTRL); | |
0b599603 UKK |
261 | } |
262 | ||
66de757c | 263 | static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx, |
0b599603 UKK |
264 | struct spi_imx_config *config) |
265 | { | |
66de757c | 266 | u32 ctrl = MX51_ECSPI_CTRL_ENABLE, cfg = 0; |
0b599603 | 267 | |
f020c39e SH |
268 | /* |
269 | * The hardware seems to have a race condition when changing modes. The | |
270 | * current assumption is that the selection of the channel arrives | |
271 | * earlier in the hardware than the mode bits when they are written at | |
272 | * the same time. | |
273 | * So set master mode for all channels as we do not support slave mode. | |
274 | */ | |
66de757c | 275 | ctrl |= MX51_ECSPI_CTRL_MODE_MASK; |
0b599603 UKK |
276 | |
277 | /* set clock speed */ | |
66de757c | 278 | ctrl |= mx51_ecspi_clkdiv(spi_imx->spi_clk, config->speed_hz); |
0b599603 UKK |
279 | |
280 | /* set chip select to use */ | |
66de757c | 281 | ctrl |= MX51_ECSPI_CTRL_CS(config->cs); |
0b599603 | 282 | |
66de757c | 283 | ctrl |= (config->bpw - 1) << MX51_ECSPI_CTRL_BL_OFFSET; |
0b599603 | 284 | |
66de757c | 285 | cfg |= MX51_ECSPI_CONFIG_SBBCTRL(config->cs); |
0b599603 UKK |
286 | |
287 | if (config->mode & SPI_CPHA) | |
66de757c | 288 | cfg |= MX51_ECSPI_CONFIG_SCLKPHA(config->cs); |
0b599603 | 289 | |
c09b890b | 290 | if (config->mode & SPI_CPOL) { |
66de757c | 291 | cfg |= MX51_ECSPI_CONFIG_SCLKPOL(config->cs); |
c09b890b KW |
292 | cfg |= MX51_ECSPI_CONFIG_SCLKCTL(config->cs); |
293 | } | |
0b599603 | 294 | if (config->mode & SPI_CS_HIGH) |
66de757c | 295 | cfg |= MX51_ECSPI_CONFIG_SSBPOL(config->cs); |
0b599603 | 296 | |
66de757c SG |
297 | writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL); |
298 | writel(cfg, spi_imx->base + MX51_ECSPI_CONFIG); | |
0b599603 UKK |
299 | |
300 | return 0; | |
301 | } | |
302 | ||
66de757c | 303 | static int __maybe_unused mx51_ecspi_rx_available(struct spi_imx_data *spi_imx) |
0b599603 | 304 | { |
66de757c | 305 | return readl(spi_imx->base + MX51_ECSPI_STAT) & MX51_ECSPI_STAT_RR; |
0b599603 UKK |
306 | } |
307 | ||
66de757c | 308 | static void __maybe_unused mx51_ecspi_reset(struct spi_imx_data *spi_imx) |
0b599603 UKK |
309 | { |
310 | /* drain receive buffer */ | |
66de757c | 311 | while (mx51_ecspi_rx_available(spi_imx)) |
0b599603 UKK |
312 | readl(spi_imx->base + MXC_CSPIRXDATA); |
313 | } | |
314 | ||
b5f3294f SH |
315 | #define MX31_INTREG_TEEN (1 << 0) |
316 | #define MX31_INTREG_RREN (1 << 3) | |
317 | ||
318 | #define MX31_CSPICTRL_ENABLE (1 << 0) | |
319 | #define MX31_CSPICTRL_MASTER (1 << 1) | |
320 | #define MX31_CSPICTRL_XCH (1 << 2) | |
321 | #define MX31_CSPICTRL_POL (1 << 4) | |
322 | #define MX31_CSPICTRL_PHA (1 << 5) | |
323 | #define MX31_CSPICTRL_SSCTL (1 << 6) | |
324 | #define MX31_CSPICTRL_SSPOL (1 << 7) | |
325 | #define MX31_CSPICTRL_BC_SHIFT 8 | |
326 | #define MX35_CSPICTRL_BL_SHIFT 20 | |
327 | #define MX31_CSPICTRL_CS_SHIFT 24 | |
328 | #define MX35_CSPICTRL_CS_SHIFT 12 | |
329 | #define MX31_CSPICTRL_DR_SHIFT 16 | |
330 | ||
331 | #define MX31_CSPISTATUS 0x14 | |
332 | #define MX31_STATUS_RR (1 << 3) | |
333 | ||
334 | /* These functions also work for the i.MX35, but be aware that | |
335 | * the i.MX35 has a slightly different register layout for bits | |
336 | * we do not use here. | |
337 | */ | |
f4ba6315 | 338 | static void __maybe_unused mx31_intctrl(struct spi_imx_data *spi_imx, int enable) |
b5f3294f SH |
339 | { |
340 | unsigned int val = 0; | |
341 | ||
342 | if (enable & MXC_INT_TE) | |
343 | val |= MX31_INTREG_TEEN; | |
344 | if (enable & MXC_INT_RR) | |
345 | val |= MX31_INTREG_RREN; | |
346 | ||
6cdeb002 | 347 | writel(val, spi_imx->base + MXC_CSPIINT); |
b5f3294f SH |
348 | } |
349 | ||
f4ba6315 | 350 | static void __maybe_unused mx31_trigger(struct spi_imx_data *spi_imx) |
b5f3294f SH |
351 | { |
352 | unsigned int reg; | |
353 | ||
6cdeb002 | 354 | reg = readl(spi_imx->base + MXC_CSPICTRL); |
b5f3294f | 355 | reg |= MX31_CSPICTRL_XCH; |
6cdeb002 | 356 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
b5f3294f SH |
357 | } |
358 | ||
2a64a90a | 359 | static int __maybe_unused mx31_config(struct spi_imx_data *spi_imx, |
1723e66b UKK |
360 | struct spi_imx_config *config) |
361 | { | |
362 | unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER; | |
3b2aa89e | 363 | int cs = spi_imx->chipselect[config->cs]; |
1723e66b UKK |
364 | |
365 | reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) << | |
366 | MX31_CSPICTRL_DR_SHIFT; | |
367 | ||
04ee5854 | 368 | if (is_imx35_cspi(spi_imx)) { |
2a64a90a SG |
369 | reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT; |
370 | reg |= MX31_CSPICTRL_SSCTL; | |
371 | } else { | |
372 | reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT; | |
373 | } | |
1723e66b UKK |
374 | |
375 | if (config->mode & SPI_CPHA) | |
376 | reg |= MX31_CSPICTRL_PHA; | |
377 | if (config->mode & SPI_CPOL) | |
378 | reg |= MX31_CSPICTRL_POL; | |
379 | if (config->mode & SPI_CS_HIGH) | |
380 | reg |= MX31_CSPICTRL_SSPOL; | |
3b2aa89e | 381 | if (cs < 0) |
2a64a90a | 382 | reg |= (cs + 32) << |
04ee5854 SG |
383 | (is_imx35_cspi(spi_imx) ? MX35_CSPICTRL_CS_SHIFT : |
384 | MX31_CSPICTRL_CS_SHIFT); | |
1723e66b UKK |
385 | |
386 | writel(reg, spi_imx->base + MXC_CSPICTRL); | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
f4ba6315 | 391 | static int __maybe_unused mx31_rx_available(struct spi_imx_data *spi_imx) |
b5f3294f | 392 | { |
6cdeb002 | 393 | return readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR; |
b5f3294f SH |
394 | } |
395 | ||
2a64a90a | 396 | static void __maybe_unused mx31_reset(struct spi_imx_data *spi_imx) |
1723e66b UKK |
397 | { |
398 | /* drain receive buffer */ | |
2a64a90a | 399 | while (readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR) |
1723e66b UKK |
400 | readl(spi_imx->base + MXC_CSPIRXDATA); |
401 | } | |
402 | ||
3451fb15 SG |
403 | #define MX21_INTREG_RR (1 << 4) |
404 | #define MX21_INTREG_TEEN (1 << 9) | |
405 | #define MX21_INTREG_RREN (1 << 13) | |
406 | ||
407 | #define MX21_CSPICTRL_POL (1 << 5) | |
408 | #define MX21_CSPICTRL_PHA (1 << 6) | |
409 | #define MX21_CSPICTRL_SSPOL (1 << 8) | |
410 | #define MX21_CSPICTRL_XCH (1 << 9) | |
411 | #define MX21_CSPICTRL_ENABLE (1 << 10) | |
412 | #define MX21_CSPICTRL_MASTER (1 << 11) | |
413 | #define MX21_CSPICTRL_DR_SHIFT 14 | |
414 | #define MX21_CSPICTRL_CS_SHIFT 19 | |
415 | ||
416 | static void __maybe_unused mx21_intctrl(struct spi_imx_data *spi_imx, int enable) | |
b5f3294f SH |
417 | { |
418 | unsigned int val = 0; | |
419 | ||
420 | if (enable & MXC_INT_TE) | |
3451fb15 | 421 | val |= MX21_INTREG_TEEN; |
b5f3294f | 422 | if (enable & MXC_INT_RR) |
3451fb15 | 423 | val |= MX21_INTREG_RREN; |
b5f3294f | 424 | |
6cdeb002 | 425 | writel(val, spi_imx->base + MXC_CSPIINT); |
b5f3294f SH |
426 | } |
427 | ||
3451fb15 | 428 | static void __maybe_unused mx21_trigger(struct spi_imx_data *spi_imx) |
b5f3294f SH |
429 | { |
430 | unsigned int reg; | |
431 | ||
6cdeb002 | 432 | reg = readl(spi_imx->base + MXC_CSPICTRL); |
3451fb15 | 433 | reg |= MX21_CSPICTRL_XCH; |
6cdeb002 | 434 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
b5f3294f SH |
435 | } |
436 | ||
3451fb15 | 437 | static int __maybe_unused mx21_config(struct spi_imx_data *spi_imx, |
6cdeb002 | 438 | struct spi_imx_config *config) |
b5f3294f | 439 | { |
3451fb15 | 440 | unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER; |
3b2aa89e | 441 | int cs = spi_imx->chipselect[config->cs]; |
04ee5854 | 442 | unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18; |
b5f3294f | 443 | |
04ee5854 | 444 | reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz, max) << |
3451fb15 | 445 | MX21_CSPICTRL_DR_SHIFT; |
b5f3294f SH |
446 | reg |= config->bpw - 1; |
447 | ||
448 | if (config->mode & SPI_CPHA) | |
3451fb15 | 449 | reg |= MX21_CSPICTRL_PHA; |
b5f3294f | 450 | if (config->mode & SPI_CPOL) |
3451fb15 | 451 | reg |= MX21_CSPICTRL_POL; |
b5f3294f | 452 | if (config->mode & SPI_CS_HIGH) |
3451fb15 | 453 | reg |= MX21_CSPICTRL_SSPOL; |
3b2aa89e | 454 | if (cs < 0) |
3451fb15 | 455 | reg |= (cs + 32) << MX21_CSPICTRL_CS_SHIFT; |
b5f3294f | 456 | |
6cdeb002 | 457 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
b5f3294f SH |
458 | |
459 | return 0; | |
460 | } | |
461 | ||
3451fb15 | 462 | static int __maybe_unused mx21_rx_available(struct spi_imx_data *spi_imx) |
b5f3294f | 463 | { |
3451fb15 | 464 | return readl(spi_imx->base + MXC_CSPIINT) & MX21_INTREG_RR; |
b5f3294f SH |
465 | } |
466 | ||
3451fb15 | 467 | static void __maybe_unused mx21_reset(struct spi_imx_data *spi_imx) |
1723e66b UKK |
468 | { |
469 | writel(1, spi_imx->base + MXC_RESET); | |
470 | } | |
471 | ||
b5f3294f SH |
472 | #define MX1_INTREG_RR (1 << 3) |
473 | #define MX1_INTREG_TEEN (1 << 8) | |
474 | #define MX1_INTREG_RREN (1 << 11) | |
475 | ||
476 | #define MX1_CSPICTRL_POL (1 << 4) | |
477 | #define MX1_CSPICTRL_PHA (1 << 5) | |
478 | #define MX1_CSPICTRL_XCH (1 << 8) | |
479 | #define MX1_CSPICTRL_ENABLE (1 << 9) | |
480 | #define MX1_CSPICTRL_MASTER (1 << 10) | |
481 | #define MX1_CSPICTRL_DR_SHIFT 13 | |
482 | ||
f4ba6315 | 483 | static void __maybe_unused mx1_intctrl(struct spi_imx_data *spi_imx, int enable) |
b5f3294f SH |
484 | { |
485 | unsigned int val = 0; | |
486 | ||
487 | if (enable & MXC_INT_TE) | |
488 | val |= MX1_INTREG_TEEN; | |
489 | if (enable & MXC_INT_RR) | |
490 | val |= MX1_INTREG_RREN; | |
491 | ||
6cdeb002 | 492 | writel(val, spi_imx->base + MXC_CSPIINT); |
b5f3294f SH |
493 | } |
494 | ||
f4ba6315 | 495 | static void __maybe_unused mx1_trigger(struct spi_imx_data *spi_imx) |
b5f3294f SH |
496 | { |
497 | unsigned int reg; | |
498 | ||
6cdeb002 | 499 | reg = readl(spi_imx->base + MXC_CSPICTRL); |
b5f3294f | 500 | reg |= MX1_CSPICTRL_XCH; |
6cdeb002 | 501 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
b5f3294f SH |
502 | } |
503 | ||
f4ba6315 | 504 | static int __maybe_unused mx1_config(struct spi_imx_data *spi_imx, |
6cdeb002 | 505 | struct spi_imx_config *config) |
b5f3294f SH |
506 | { |
507 | unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER; | |
508 | ||
6cdeb002 | 509 | reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) << |
b5f3294f SH |
510 | MX1_CSPICTRL_DR_SHIFT; |
511 | reg |= config->bpw - 1; | |
512 | ||
513 | if (config->mode & SPI_CPHA) | |
514 | reg |= MX1_CSPICTRL_PHA; | |
515 | if (config->mode & SPI_CPOL) | |
516 | reg |= MX1_CSPICTRL_POL; | |
517 | ||
6cdeb002 | 518 | writel(reg, spi_imx->base + MXC_CSPICTRL); |
b5f3294f SH |
519 | |
520 | return 0; | |
521 | } | |
522 | ||
f4ba6315 | 523 | static int __maybe_unused mx1_rx_available(struct spi_imx_data *spi_imx) |
b5f3294f | 524 | { |
6cdeb002 | 525 | return readl(spi_imx->base + MXC_CSPIINT) & MX1_INTREG_RR; |
b5f3294f SH |
526 | } |
527 | ||
1723e66b UKK |
528 | static void __maybe_unused mx1_reset(struct spi_imx_data *spi_imx) |
529 | { | |
530 | writel(1, spi_imx->base + MXC_RESET); | |
531 | } | |
532 | ||
04ee5854 SG |
533 | static struct spi_imx_devtype_data imx1_cspi_devtype_data = { |
534 | .intctrl = mx1_intctrl, | |
535 | .config = mx1_config, | |
536 | .trigger = mx1_trigger, | |
537 | .rx_available = mx1_rx_available, | |
538 | .reset = mx1_reset, | |
539 | .devtype = IMX1_CSPI, | |
540 | }; | |
541 | ||
542 | static struct spi_imx_devtype_data imx21_cspi_devtype_data = { | |
543 | .intctrl = mx21_intctrl, | |
544 | .config = mx21_config, | |
545 | .trigger = mx21_trigger, | |
546 | .rx_available = mx21_rx_available, | |
547 | .reset = mx21_reset, | |
548 | .devtype = IMX21_CSPI, | |
549 | }; | |
550 | ||
551 | static struct spi_imx_devtype_data imx27_cspi_devtype_data = { | |
552 | /* i.mx27 cspi shares the functions with i.mx21 one */ | |
553 | .intctrl = mx21_intctrl, | |
554 | .config = mx21_config, | |
555 | .trigger = mx21_trigger, | |
556 | .rx_available = mx21_rx_available, | |
557 | .reset = mx21_reset, | |
558 | .devtype = IMX27_CSPI, | |
559 | }; | |
560 | ||
561 | static struct spi_imx_devtype_data imx31_cspi_devtype_data = { | |
562 | .intctrl = mx31_intctrl, | |
563 | .config = mx31_config, | |
564 | .trigger = mx31_trigger, | |
565 | .rx_available = mx31_rx_available, | |
566 | .reset = mx31_reset, | |
567 | .devtype = IMX31_CSPI, | |
568 | }; | |
569 | ||
570 | static struct spi_imx_devtype_data imx35_cspi_devtype_data = { | |
571 | /* i.mx35 and later cspi shares the functions with i.mx31 one */ | |
572 | .intctrl = mx31_intctrl, | |
573 | .config = mx31_config, | |
574 | .trigger = mx31_trigger, | |
575 | .rx_available = mx31_rx_available, | |
576 | .reset = mx31_reset, | |
577 | .devtype = IMX35_CSPI, | |
578 | }; | |
579 | ||
580 | static struct spi_imx_devtype_data imx51_ecspi_devtype_data = { | |
581 | .intctrl = mx51_ecspi_intctrl, | |
582 | .config = mx51_ecspi_config, | |
583 | .trigger = mx51_ecspi_trigger, | |
584 | .rx_available = mx51_ecspi_rx_available, | |
585 | .reset = mx51_ecspi_reset, | |
586 | .devtype = IMX51_ECSPI, | |
587 | }; | |
588 | ||
589 | static struct platform_device_id spi_imx_devtype[] = { | |
590 | { | |
591 | .name = "imx1-cspi", | |
592 | .driver_data = (kernel_ulong_t) &imx1_cspi_devtype_data, | |
593 | }, { | |
594 | .name = "imx21-cspi", | |
595 | .driver_data = (kernel_ulong_t) &imx21_cspi_devtype_data, | |
596 | }, { | |
597 | .name = "imx27-cspi", | |
598 | .driver_data = (kernel_ulong_t) &imx27_cspi_devtype_data, | |
599 | }, { | |
600 | .name = "imx31-cspi", | |
601 | .driver_data = (kernel_ulong_t) &imx31_cspi_devtype_data, | |
602 | }, { | |
603 | .name = "imx35-cspi", | |
604 | .driver_data = (kernel_ulong_t) &imx35_cspi_devtype_data, | |
605 | }, { | |
606 | .name = "imx51-ecspi", | |
607 | .driver_data = (kernel_ulong_t) &imx51_ecspi_devtype_data, | |
608 | }, { | |
609 | /* sentinel */ | |
610 | } | |
f4ba6315 UKK |
611 | }; |
612 | ||
22a85e4c SG |
613 | static const struct of_device_id spi_imx_dt_ids[] = { |
614 | { .compatible = "fsl,imx1-cspi", .data = &imx1_cspi_devtype_data, }, | |
615 | { .compatible = "fsl,imx21-cspi", .data = &imx21_cspi_devtype_data, }, | |
616 | { .compatible = "fsl,imx27-cspi", .data = &imx27_cspi_devtype_data, }, | |
617 | { .compatible = "fsl,imx31-cspi", .data = &imx31_cspi_devtype_data, }, | |
618 | { .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, }, | |
619 | { .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, }, | |
620 | { /* sentinel */ } | |
621 | }; | |
27743e0b | 622 | MODULE_DEVICE_TABLE(of, spi_imx_dt_ids); |
22a85e4c | 623 | |
6cdeb002 | 624 | static void spi_imx_chipselect(struct spi_device *spi, int is_active) |
b5f3294f | 625 | { |
6cdeb002 | 626 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
6cdeb002 | 627 | int gpio = spi_imx->chipselect[spi->chip_select]; |
e6a0a8bf UKK |
628 | int active = is_active != BITBANG_CS_INACTIVE; |
629 | int dev_is_lowactive = !(spi->mode & SPI_CS_HIGH); | |
b5f3294f | 630 | |
8b17e055 | 631 | if (!gpio_is_valid(gpio)) |
b5f3294f | 632 | return; |
b5f3294f | 633 | |
e6a0a8bf | 634 | gpio_set_value(gpio, dev_is_lowactive ^ active); |
b5f3294f SH |
635 | } |
636 | ||
6cdeb002 | 637 | static void spi_imx_push(struct spi_imx_data *spi_imx) |
b5f3294f | 638 | { |
04ee5854 | 639 | while (spi_imx->txfifo < spi_imx_get_fifosize(spi_imx)) { |
6cdeb002 | 640 | if (!spi_imx->count) |
b5f3294f | 641 | break; |
6cdeb002 UKK |
642 | spi_imx->tx(spi_imx); |
643 | spi_imx->txfifo++; | |
b5f3294f SH |
644 | } |
645 | ||
edd501bb | 646 | spi_imx->devtype_data->trigger(spi_imx); |
b5f3294f SH |
647 | } |
648 | ||
6cdeb002 | 649 | static irqreturn_t spi_imx_isr(int irq, void *dev_id) |
b5f3294f | 650 | { |
6cdeb002 | 651 | struct spi_imx_data *spi_imx = dev_id; |
b5f3294f | 652 | |
edd501bb | 653 | while (spi_imx->devtype_data->rx_available(spi_imx)) { |
6cdeb002 UKK |
654 | spi_imx->rx(spi_imx); |
655 | spi_imx->txfifo--; | |
b5f3294f SH |
656 | } |
657 | ||
6cdeb002 UKK |
658 | if (spi_imx->count) { |
659 | spi_imx_push(spi_imx); | |
b5f3294f SH |
660 | return IRQ_HANDLED; |
661 | } | |
662 | ||
6cdeb002 | 663 | if (spi_imx->txfifo) { |
b5f3294f SH |
664 | /* No data left to push, but still waiting for rx data, |
665 | * enable receive data available interrupt. | |
666 | */ | |
edd501bb | 667 | spi_imx->devtype_data->intctrl( |
f4ba6315 | 668 | spi_imx, MXC_INT_RR); |
b5f3294f SH |
669 | return IRQ_HANDLED; |
670 | } | |
671 | ||
edd501bb | 672 | spi_imx->devtype_data->intctrl(spi_imx, 0); |
6cdeb002 | 673 | complete(&spi_imx->xfer_done); |
b5f3294f SH |
674 | |
675 | return IRQ_HANDLED; | |
676 | } | |
677 | ||
6cdeb002 | 678 | static int spi_imx_setupxfer(struct spi_device *spi, |
b5f3294f SH |
679 | struct spi_transfer *t) |
680 | { | |
6cdeb002 UKK |
681 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
682 | struct spi_imx_config config; | |
b5f3294f SH |
683 | |
684 | config.bpw = t ? t->bits_per_word : spi->bits_per_word; | |
685 | config.speed_hz = t ? t->speed_hz : spi->max_speed_hz; | |
686 | config.mode = spi->mode; | |
3b2aa89e | 687 | config.cs = spi->chip_select; |
b5f3294f | 688 | |
462d26b5 SH |
689 | if (!config.speed_hz) |
690 | config.speed_hz = spi->max_speed_hz; | |
691 | if (!config.bpw) | |
692 | config.bpw = spi->bits_per_word; | |
462d26b5 | 693 | |
e6a0a8bf UKK |
694 | /* Initialize the functions for transfer */ |
695 | if (config.bpw <= 8) { | |
696 | spi_imx->rx = spi_imx_buf_rx_u8; | |
697 | spi_imx->tx = spi_imx_buf_tx_u8; | |
698 | } else if (config.bpw <= 16) { | |
699 | spi_imx->rx = spi_imx_buf_rx_u16; | |
700 | spi_imx->tx = spi_imx_buf_tx_u16; | |
6051426f | 701 | } else { |
e6a0a8bf UKK |
702 | spi_imx->rx = spi_imx_buf_rx_u32; |
703 | spi_imx->tx = spi_imx_buf_tx_u32; | |
24778be2 | 704 | } |
e6a0a8bf | 705 | |
edd501bb | 706 | spi_imx->devtype_data->config(spi_imx, &config); |
b5f3294f SH |
707 | |
708 | return 0; | |
709 | } | |
710 | ||
6cdeb002 | 711 | static int spi_imx_transfer(struct spi_device *spi, |
b5f3294f SH |
712 | struct spi_transfer *transfer) |
713 | { | |
6cdeb002 | 714 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
b5f3294f | 715 | |
6cdeb002 UKK |
716 | spi_imx->tx_buf = transfer->tx_buf; |
717 | spi_imx->rx_buf = transfer->rx_buf; | |
718 | spi_imx->count = transfer->len; | |
719 | spi_imx->txfifo = 0; | |
b5f3294f | 720 | |
6cdeb002 | 721 | init_completion(&spi_imx->xfer_done); |
b5f3294f | 722 | |
6cdeb002 | 723 | spi_imx_push(spi_imx); |
b5f3294f | 724 | |
edd501bb | 725 | spi_imx->devtype_data->intctrl(spi_imx, MXC_INT_TE); |
b5f3294f | 726 | |
6cdeb002 | 727 | wait_for_completion(&spi_imx->xfer_done); |
b5f3294f SH |
728 | |
729 | return transfer->len; | |
730 | } | |
731 | ||
6cdeb002 | 732 | static int spi_imx_setup(struct spi_device *spi) |
b5f3294f | 733 | { |
6c23e5d4 SH |
734 | struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master); |
735 | int gpio = spi_imx->chipselect[spi->chip_select]; | |
736 | ||
f4d4ecfe | 737 | dev_dbg(&spi->dev, "%s: mode %d, %u bpw, %d hz\n", __func__, |
b5f3294f SH |
738 | spi->mode, spi->bits_per_word, spi->max_speed_hz); |
739 | ||
8b17e055 | 740 | if (gpio_is_valid(gpio)) |
6c23e5d4 SH |
741 | gpio_direction_output(gpio, spi->mode & SPI_CS_HIGH ? 0 : 1); |
742 | ||
6cdeb002 | 743 | spi_imx_chipselect(spi, BITBANG_CS_INACTIVE); |
b5f3294f SH |
744 | |
745 | return 0; | |
746 | } | |
747 | ||
6cdeb002 | 748 | static void spi_imx_cleanup(struct spi_device *spi) |
b5f3294f SH |
749 | { |
750 | } | |
751 | ||
9e556dcc HS |
752 | static int |
753 | spi_imx_prepare_message(struct spi_master *master, struct spi_message *msg) | |
754 | { | |
755 | struct spi_imx_data *spi_imx = spi_master_get_devdata(master); | |
756 | int ret; | |
757 | ||
758 | ret = clk_enable(spi_imx->clk_per); | |
759 | if (ret) | |
760 | return ret; | |
761 | ||
762 | ret = clk_enable(spi_imx->clk_ipg); | |
763 | if (ret) { | |
764 | clk_disable(spi_imx->clk_per); | |
765 | return ret; | |
766 | } | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
771 | static int | |
772 | spi_imx_unprepare_message(struct spi_master *master, struct spi_message *msg) | |
773 | { | |
774 | struct spi_imx_data *spi_imx = spi_master_get_devdata(master); | |
775 | ||
776 | clk_disable(spi_imx->clk_ipg); | |
777 | clk_disable(spi_imx->clk_per); | |
778 | return 0; | |
779 | } | |
780 | ||
fd4a319b | 781 | static int spi_imx_probe(struct platform_device *pdev) |
b5f3294f | 782 | { |
22a85e4c SG |
783 | struct device_node *np = pdev->dev.of_node; |
784 | const struct of_device_id *of_id = | |
785 | of_match_device(spi_imx_dt_ids, &pdev->dev); | |
786 | struct spi_imx_master *mxc_platform_info = | |
787 | dev_get_platdata(&pdev->dev); | |
b5f3294f | 788 | struct spi_master *master; |
6cdeb002 | 789 | struct spi_imx_data *spi_imx; |
b5f3294f | 790 | struct resource *res; |
c2387cb9 | 791 | int i, ret, num_cs; |
b5f3294f | 792 | |
22a85e4c | 793 | if (!np && !mxc_platform_info) { |
b5f3294f SH |
794 | dev_err(&pdev->dev, "can't get the platform data\n"); |
795 | return -EINVAL; | |
796 | } | |
797 | ||
22a85e4c | 798 | ret = of_property_read_u32(np, "fsl,spi-num-chipselects", &num_cs); |
39ec0d38 LW |
799 | if (ret < 0) { |
800 | if (mxc_platform_info) | |
801 | num_cs = mxc_platform_info->num_chipselect; | |
802 | else | |
803 | return ret; | |
804 | } | |
22a85e4c | 805 | |
c2387cb9 SG |
806 | master = spi_alloc_master(&pdev->dev, |
807 | sizeof(struct spi_imx_data) + sizeof(int) * num_cs); | |
b5f3294f SH |
808 | if (!master) |
809 | return -ENOMEM; | |
810 | ||
811 | platform_set_drvdata(pdev, master); | |
812 | ||
24778be2 | 813 | master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); |
b5f3294f | 814 | master->bus_num = pdev->id; |
c2387cb9 | 815 | master->num_chipselect = num_cs; |
b5f3294f | 816 | |
6cdeb002 | 817 | spi_imx = spi_master_get_devdata(master); |
94c69f76 | 818 | spi_imx->bitbang.master = master; |
b5f3294f SH |
819 | |
820 | for (i = 0; i < master->num_chipselect; i++) { | |
22a85e4c | 821 | int cs_gpio = of_get_named_gpio(np, "cs-gpios", i); |
8b17e055 | 822 | if (!gpio_is_valid(cs_gpio) && mxc_platform_info) |
22a85e4c | 823 | cs_gpio = mxc_platform_info->chipselect[i]; |
4cc122ac FE |
824 | |
825 | spi_imx->chipselect[i] = cs_gpio; | |
8b17e055 | 826 | if (!gpio_is_valid(cs_gpio)) |
b5f3294f | 827 | continue; |
4cc122ac | 828 | |
130b82c0 FE |
829 | ret = devm_gpio_request(&pdev->dev, spi_imx->chipselect[i], |
830 | DRIVER_NAME); | |
b5f3294f | 831 | if (ret) { |
bbd050af | 832 | dev_err(&pdev->dev, "can't get cs gpios\n"); |
130b82c0 | 833 | goto out_master_put; |
b5f3294f | 834 | } |
b5f3294f SH |
835 | } |
836 | ||
6cdeb002 UKK |
837 | spi_imx->bitbang.chipselect = spi_imx_chipselect; |
838 | spi_imx->bitbang.setup_transfer = spi_imx_setupxfer; | |
839 | spi_imx->bitbang.txrx_bufs = spi_imx_transfer; | |
840 | spi_imx->bitbang.master->setup = spi_imx_setup; | |
841 | spi_imx->bitbang.master->cleanup = spi_imx_cleanup; | |
9e556dcc HS |
842 | spi_imx->bitbang.master->prepare_message = spi_imx_prepare_message; |
843 | spi_imx->bitbang.master->unprepare_message = spi_imx_unprepare_message; | |
3910f2cf | 844 | spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; |
b5f3294f | 845 | |
6cdeb002 | 846 | init_completion(&spi_imx->xfer_done); |
b5f3294f | 847 | |
22a85e4c | 848 | spi_imx->devtype_data = of_id ? of_id->data : |
04ee5854 | 849 | (struct spi_imx_devtype_data *) pdev->id_entry->driver_data; |
f4ba6315 | 850 | |
b5f3294f | 851 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
130b82c0 FE |
852 | spi_imx->base = devm_ioremap_resource(&pdev->dev, res); |
853 | if (IS_ERR(spi_imx->base)) { | |
854 | ret = PTR_ERR(spi_imx->base); | |
855 | goto out_master_put; | |
b5f3294f SH |
856 | } |
857 | ||
6cdeb002 | 858 | spi_imx->irq = platform_get_irq(pdev, 0); |
73575938 | 859 | if (spi_imx->irq < 0) { |
b5f3294f | 860 | ret = -EINVAL; |
130b82c0 | 861 | goto out_master_put; |
b5f3294f SH |
862 | } |
863 | ||
130b82c0 FE |
864 | ret = devm_request_irq(&pdev->dev, spi_imx->irq, spi_imx_isr, 0, |
865 | DRIVER_NAME, spi_imx); | |
b5f3294f | 866 | if (ret) { |
6cdeb002 | 867 | dev_err(&pdev->dev, "can't get irq%d: %d\n", spi_imx->irq, ret); |
130b82c0 | 868 | goto out_master_put; |
b5f3294f SH |
869 | } |
870 | ||
aa29d840 SH |
871 | spi_imx->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
872 | if (IS_ERR(spi_imx->clk_ipg)) { | |
873 | ret = PTR_ERR(spi_imx->clk_ipg); | |
130b82c0 | 874 | goto out_master_put; |
b5f3294f SH |
875 | } |
876 | ||
aa29d840 SH |
877 | spi_imx->clk_per = devm_clk_get(&pdev->dev, "per"); |
878 | if (IS_ERR(spi_imx->clk_per)) { | |
879 | ret = PTR_ERR(spi_imx->clk_per); | |
130b82c0 | 880 | goto out_master_put; |
aa29d840 SH |
881 | } |
882 | ||
83174626 FE |
883 | ret = clk_prepare_enable(spi_imx->clk_per); |
884 | if (ret) | |
885 | goto out_master_put; | |
886 | ||
887 | ret = clk_prepare_enable(spi_imx->clk_ipg); | |
888 | if (ret) | |
889 | goto out_put_per; | |
aa29d840 SH |
890 | |
891 | spi_imx->spi_clk = clk_get_rate(spi_imx->clk_per); | |
b5f3294f | 892 | |
edd501bb | 893 | spi_imx->devtype_data->reset(spi_imx); |
ce1807b2 | 894 | |
edd501bb | 895 | spi_imx->devtype_data->intctrl(spi_imx, 0); |
b5f3294f | 896 | |
22a85e4c | 897 | master->dev.of_node = pdev->dev.of_node; |
6cdeb002 | 898 | ret = spi_bitbang_start(&spi_imx->bitbang); |
b5f3294f SH |
899 | if (ret) { |
900 | dev_err(&pdev->dev, "bitbang start failed with %d\n", ret); | |
901 | goto out_clk_put; | |
902 | } | |
903 | ||
904 | dev_info(&pdev->dev, "probed\n"); | |
905 | ||
9e556dcc HS |
906 | clk_disable(spi_imx->clk_ipg); |
907 | clk_disable(spi_imx->clk_per); | |
b5f3294f SH |
908 | return ret; |
909 | ||
910 | out_clk_put: | |
aa29d840 | 911 | clk_disable_unprepare(spi_imx->clk_ipg); |
83174626 FE |
912 | out_put_per: |
913 | clk_disable_unprepare(spi_imx->clk_per); | |
130b82c0 | 914 | out_master_put: |
b5f3294f | 915 | spi_master_put(master); |
130b82c0 | 916 | |
b5f3294f SH |
917 | return ret; |
918 | } | |
919 | ||
fd4a319b | 920 | static int spi_imx_remove(struct platform_device *pdev) |
b5f3294f SH |
921 | { |
922 | struct spi_master *master = platform_get_drvdata(pdev); | |
6cdeb002 | 923 | struct spi_imx_data *spi_imx = spi_master_get_devdata(master); |
b5f3294f | 924 | |
6cdeb002 | 925 | spi_bitbang_stop(&spi_imx->bitbang); |
b5f3294f | 926 | |
6cdeb002 | 927 | writel(0, spi_imx->base + MXC_CSPICTRL); |
aa29d840 | 928 | clk_disable_unprepare(spi_imx->clk_ipg); |
83174626 | 929 | clk_disable_unprepare(spi_imx->clk_per); |
b5f3294f SH |
930 | spi_master_put(master); |
931 | ||
b5f3294f SH |
932 | return 0; |
933 | } | |
934 | ||
6cdeb002 | 935 | static struct platform_driver spi_imx_driver = { |
b5f3294f SH |
936 | .driver = { |
937 | .name = DRIVER_NAME, | |
938 | .owner = THIS_MODULE, | |
22a85e4c | 939 | .of_match_table = spi_imx_dt_ids, |
b5f3294f | 940 | }, |
f4ba6315 | 941 | .id_table = spi_imx_devtype, |
6cdeb002 | 942 | .probe = spi_imx_probe, |
fd4a319b | 943 | .remove = spi_imx_remove, |
b5f3294f | 944 | }; |
940ab889 | 945 | module_platform_driver(spi_imx_driver); |
b5f3294f SH |
946 | |
947 | MODULE_DESCRIPTION("SPI Master Controller driver"); | |
948 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
949 | MODULE_LICENSE("GPL"); | |
3133fba3 | 950 | MODULE_ALIAS("platform:" DRIVER_NAME); |