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5e1c5ff4 TL |
1 | /* |
2 | * linux/arch/arm/plat-omap/mcbsp.c | |
3 | * | |
4 | * Copyright (C) 2004 Nokia Corporation | |
5 | * Author: Samuel Ortiz <samuel.ortiz@nokia.com> | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Multichannel mode not supported. | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/device.h> | |
bc5d0c89 | 18 | #include <linux/platform_device.h> |
5e1c5ff4 TL |
19 | #include <linux/wait.h> |
20 | #include <linux/completion.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/err.h> | |
f8ce2547 | 23 | #include <linux/clk.h> |
04fbf6a2 | 24 | #include <linux/delay.h> |
fb78d808 | 25 | #include <linux/io.h> |
5e1c5ff4 | 26 | |
ce491cf8 TL |
27 | #include <plat/dma.h> |
28 | #include <plat/mcbsp.h> | |
5e1c5ff4 | 29 | |
b4b58f58 CS |
30 | struct omap_mcbsp **mcbsp_ptr; |
31 | int omap_mcbsp_count; | |
bc5d0c89 | 32 | |
b4b58f58 CS |
33 | void omap_mcbsp_write(void __iomem *io_base, u16 reg, u32 val) |
34 | { | |
35 | if (cpu_class_is_omap1() || cpu_is_omap2420()) | |
36 | __raw_writew((u16)val, io_base + reg); | |
37 | else | |
38 | __raw_writel(val, io_base + reg); | |
39 | } | |
40 | ||
41 | int omap_mcbsp_read(void __iomem *io_base, u16 reg) | |
42 | { | |
43 | if (cpu_class_is_omap1() || cpu_is_omap2420()) | |
44 | return __raw_readw(io_base + reg); | |
45 | else | |
46 | return __raw_readl(io_base + reg); | |
47 | } | |
48 | ||
49 | #define OMAP_MCBSP_READ(base, reg) \ | |
50 | omap_mcbsp_read(base, OMAP_MCBSP_REG_##reg) | |
51 | #define OMAP_MCBSP_WRITE(base, reg, val) \ | |
52 | omap_mcbsp_write(base, OMAP_MCBSP_REG_##reg, val) | |
53 | ||
54 | #define omap_mcbsp_check_valid_id(id) (id < omap_mcbsp_count) | |
55 | #define id_to_mcbsp_ptr(id) mcbsp_ptr[id]; | |
5e1c5ff4 TL |
56 | |
57 | static void omap_mcbsp_dump_reg(u8 id) | |
58 | { | |
b4b58f58 CS |
59 | struct omap_mcbsp *mcbsp = id_to_mcbsp_ptr(id); |
60 | ||
61 | dev_dbg(mcbsp->dev, "**** McBSP%d regs ****\n", mcbsp->id); | |
62 | dev_dbg(mcbsp->dev, "DRR2: 0x%04x\n", | |
63 | OMAP_MCBSP_READ(mcbsp->io_base, DRR2)); | |
64 | dev_dbg(mcbsp->dev, "DRR1: 0x%04x\n", | |
65 | OMAP_MCBSP_READ(mcbsp->io_base, DRR1)); | |
66 | dev_dbg(mcbsp->dev, "DXR2: 0x%04x\n", | |
67 | OMAP_MCBSP_READ(mcbsp->io_base, DXR2)); | |
68 | dev_dbg(mcbsp->dev, "DXR1: 0x%04x\n", | |
69 | OMAP_MCBSP_READ(mcbsp->io_base, DXR1)); | |
70 | dev_dbg(mcbsp->dev, "SPCR2: 0x%04x\n", | |
71 | OMAP_MCBSP_READ(mcbsp->io_base, SPCR2)); | |
72 | dev_dbg(mcbsp->dev, "SPCR1: 0x%04x\n", | |
73 | OMAP_MCBSP_READ(mcbsp->io_base, SPCR1)); | |
74 | dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n", | |
75 | OMAP_MCBSP_READ(mcbsp->io_base, RCR2)); | |
76 | dev_dbg(mcbsp->dev, "RCR1: 0x%04x\n", | |
77 | OMAP_MCBSP_READ(mcbsp->io_base, RCR1)); | |
78 | dev_dbg(mcbsp->dev, "XCR2: 0x%04x\n", | |
79 | OMAP_MCBSP_READ(mcbsp->io_base, XCR2)); | |
80 | dev_dbg(mcbsp->dev, "XCR1: 0x%04x\n", | |
81 | OMAP_MCBSP_READ(mcbsp->io_base, XCR1)); | |
82 | dev_dbg(mcbsp->dev, "SRGR2: 0x%04x\n", | |
83 | OMAP_MCBSP_READ(mcbsp->io_base, SRGR2)); | |
84 | dev_dbg(mcbsp->dev, "SRGR1: 0x%04x\n", | |
85 | OMAP_MCBSP_READ(mcbsp->io_base, SRGR1)); | |
86 | dev_dbg(mcbsp->dev, "PCR0: 0x%04x\n", | |
87 | OMAP_MCBSP_READ(mcbsp->io_base, PCR0)); | |
88 | dev_dbg(mcbsp->dev, "***********************\n"); | |
5e1c5ff4 TL |
89 | } |
90 | ||
0cd61b68 | 91 | static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id) |
5e1c5ff4 | 92 | { |
e8f2af17 | 93 | struct omap_mcbsp *mcbsp_tx = dev_id; |
d6d834b0 | 94 | u16 irqst_spcr2; |
5e1c5ff4 | 95 | |
d6d834b0 EN |
96 | irqst_spcr2 = OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2); |
97 | dev_dbg(mcbsp_tx->dev, "TX IRQ callback : 0x%x\n", irqst_spcr2); | |
5e1c5ff4 | 98 | |
d6d834b0 EN |
99 | if (irqst_spcr2 & XSYNC_ERR) { |
100 | dev_err(mcbsp_tx->dev, "TX Frame Sync Error! : 0x%x\n", | |
101 | irqst_spcr2); | |
102 | /* Writing zero to XSYNC_ERR clears the IRQ */ | |
103 | OMAP_MCBSP_WRITE(mcbsp_tx->io_base, SPCR2, | |
104 | irqst_spcr2 & ~(XSYNC_ERR)); | |
105 | } else { | |
106 | complete(&mcbsp_tx->tx_irq_completion); | |
107 | } | |
fb78d808 | 108 | |
5e1c5ff4 TL |
109 | return IRQ_HANDLED; |
110 | } | |
111 | ||
0cd61b68 | 112 | static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id) |
5e1c5ff4 | 113 | { |
e8f2af17 | 114 | struct omap_mcbsp *mcbsp_rx = dev_id; |
d6d834b0 EN |
115 | u16 irqst_spcr1; |
116 | ||
117 | irqst_spcr1 = OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR1); | |
118 | dev_dbg(mcbsp_rx->dev, "RX IRQ callback : 0x%x\n", irqst_spcr1); | |
119 | ||
120 | if (irqst_spcr1 & RSYNC_ERR) { | |
121 | dev_err(mcbsp_rx->dev, "RX Frame Sync Error! : 0x%x\n", | |
122 | irqst_spcr1); | |
123 | /* Writing zero to RSYNC_ERR clears the IRQ */ | |
124 | OMAP_MCBSP_WRITE(mcbsp_rx->io_base, SPCR1, | |
125 | irqst_spcr1 & ~(RSYNC_ERR)); | |
126 | } else { | |
127 | complete(&mcbsp_rx->tx_irq_completion); | |
128 | } | |
fb78d808 | 129 | |
5e1c5ff4 TL |
130 | return IRQ_HANDLED; |
131 | } | |
132 | ||
5e1c5ff4 TL |
133 | static void omap_mcbsp_tx_dma_callback(int lch, u16 ch_status, void *data) |
134 | { | |
e8f2af17 | 135 | struct omap_mcbsp *mcbsp_dma_tx = data; |
5e1c5ff4 | 136 | |
bc5d0c89 EV |
137 | dev_dbg(mcbsp_dma_tx->dev, "TX DMA callback : 0x%x\n", |
138 | OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2)); | |
5e1c5ff4 TL |
139 | |
140 | /* We can free the channels */ | |
141 | omap_free_dma(mcbsp_dma_tx->dma_tx_lch); | |
142 | mcbsp_dma_tx->dma_tx_lch = -1; | |
143 | ||
144 | complete(&mcbsp_dma_tx->tx_dma_completion); | |
145 | } | |
146 | ||
147 | static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data) | |
148 | { | |
e8f2af17 | 149 | struct omap_mcbsp *mcbsp_dma_rx = data; |
5e1c5ff4 | 150 | |
bc5d0c89 EV |
151 | dev_dbg(mcbsp_dma_rx->dev, "RX DMA callback : 0x%x\n", |
152 | OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2)); | |
5e1c5ff4 TL |
153 | |
154 | /* We can free the channels */ | |
155 | omap_free_dma(mcbsp_dma_rx->dma_rx_lch); | |
156 | mcbsp_dma_rx->dma_rx_lch = -1; | |
157 | ||
158 | complete(&mcbsp_dma_rx->rx_dma_completion); | |
159 | } | |
160 | ||
5e1c5ff4 TL |
161 | /* |
162 | * omap_mcbsp_config simply write a config to the | |
163 | * appropriate McBSP. | |
164 | * You either call this function or set the McBSP registers | |
165 | * by yourself before calling omap_mcbsp_start(). | |
166 | */ | |
fb78d808 | 167 | void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config) |
5e1c5ff4 | 168 | { |
b4b58f58 | 169 | struct omap_mcbsp *mcbsp; |
d592dd1a | 170 | void __iomem *io_base; |
5e1c5ff4 | 171 | |
bc5d0c89 EV |
172 | if (!omap_mcbsp_check_valid_id(id)) { |
173 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
174 | return; | |
175 | } | |
b4b58f58 | 176 | mcbsp = id_to_mcbsp_ptr(id); |
bc5d0c89 | 177 | |
b4b58f58 CS |
178 | io_base = mcbsp->io_base; |
179 | dev_dbg(mcbsp->dev, "Configuring McBSP%d phys_base: 0x%08lx\n", | |
180 | mcbsp->id, mcbsp->phys_base); | |
5e1c5ff4 TL |
181 | |
182 | /* We write the given config */ | |
183 | OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2); | |
184 | OMAP_MCBSP_WRITE(io_base, SPCR1, config->spcr1); | |
185 | OMAP_MCBSP_WRITE(io_base, RCR2, config->rcr2); | |
186 | OMAP_MCBSP_WRITE(io_base, RCR1, config->rcr1); | |
187 | OMAP_MCBSP_WRITE(io_base, XCR2, config->xcr2); | |
188 | OMAP_MCBSP_WRITE(io_base, XCR1, config->xcr1); | |
189 | OMAP_MCBSP_WRITE(io_base, SRGR2, config->srgr2); | |
190 | OMAP_MCBSP_WRITE(io_base, SRGR1, config->srgr1); | |
191 | OMAP_MCBSP_WRITE(io_base, MCR2, config->mcr2); | |
192 | OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1); | |
193 | OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0); | |
a5b92cc3 | 194 | if (cpu_is_omap2430() || cpu_is_omap34xx() || cpu_is_omap44xx()) { |
3127f8f8 TL |
195 | OMAP_MCBSP_WRITE(io_base, XCCR, config->xccr); |
196 | OMAP_MCBSP_WRITE(io_base, RCCR, config->rccr); | |
197 | } | |
5e1c5ff4 | 198 | } |
fb78d808 | 199 | EXPORT_SYMBOL(omap_mcbsp_config); |
5e1c5ff4 | 200 | |
7aa9ff56 EV |
201 | #ifdef CONFIG_ARCH_OMAP34XX |
202 | /* | |
203 | * omap_mcbsp_set_tx_threshold configures how to deal | |
204 | * with transmit threshold. the threshold value and handler can be | |
205 | * configure in here. | |
206 | */ | |
207 | void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold) | |
208 | { | |
209 | struct omap_mcbsp *mcbsp; | |
210 | void __iomem *io_base; | |
211 | ||
212 | if (!cpu_is_omap34xx()) | |
213 | return; | |
214 | ||
215 | if (!omap_mcbsp_check_valid_id(id)) { | |
216 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
217 | return; | |
218 | } | |
219 | mcbsp = id_to_mcbsp_ptr(id); | |
220 | io_base = mcbsp->io_base; | |
221 | ||
222 | OMAP_MCBSP_WRITE(io_base, THRSH2, threshold); | |
223 | } | |
224 | EXPORT_SYMBOL(omap_mcbsp_set_tx_threshold); | |
225 | ||
226 | /* | |
227 | * omap_mcbsp_set_rx_threshold configures how to deal | |
228 | * with receive threshold. the threshold value and handler can be | |
229 | * configure in here. | |
230 | */ | |
231 | void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold) | |
232 | { | |
233 | struct omap_mcbsp *mcbsp; | |
234 | void __iomem *io_base; | |
235 | ||
236 | if (!cpu_is_omap34xx()) | |
237 | return; | |
238 | ||
239 | if (!omap_mcbsp_check_valid_id(id)) { | |
240 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
241 | return; | |
242 | } | |
243 | mcbsp = id_to_mcbsp_ptr(id); | |
244 | io_base = mcbsp->io_base; | |
245 | ||
246 | OMAP_MCBSP_WRITE(io_base, THRSH1, threshold); | |
247 | } | |
248 | EXPORT_SYMBOL(omap_mcbsp_set_rx_threshold); | |
a1a56f5f EV |
249 | |
250 | /* | |
251 | * omap_mcbsp_get_max_tx_thres just return the current configured | |
252 | * maximum threshold for transmission | |
253 | */ | |
254 | u16 omap_mcbsp_get_max_tx_threshold(unsigned int id) | |
255 | { | |
256 | struct omap_mcbsp *mcbsp; | |
257 | ||
258 | if (!omap_mcbsp_check_valid_id(id)) { | |
259 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
260 | return -ENODEV; | |
261 | } | |
262 | mcbsp = id_to_mcbsp_ptr(id); | |
263 | ||
264 | return mcbsp->max_tx_thres; | |
265 | } | |
266 | EXPORT_SYMBOL(omap_mcbsp_get_max_tx_threshold); | |
267 | ||
268 | /* | |
269 | * omap_mcbsp_get_max_rx_thres just return the current configured | |
270 | * maximum threshold for reception | |
271 | */ | |
272 | u16 omap_mcbsp_get_max_rx_threshold(unsigned int id) | |
273 | { | |
274 | struct omap_mcbsp *mcbsp; | |
275 | ||
276 | if (!omap_mcbsp_check_valid_id(id)) { | |
277 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
278 | return -ENODEV; | |
279 | } | |
280 | mcbsp = id_to_mcbsp_ptr(id); | |
281 | ||
282 | return mcbsp->max_rx_thres; | |
283 | } | |
284 | EXPORT_SYMBOL(omap_mcbsp_get_max_rx_threshold); | |
98cb20e8 PU |
285 | |
286 | /* | |
287 | * omap_mcbsp_get_dma_op_mode just return the current configured | |
288 | * operating mode for the mcbsp channel | |
289 | */ | |
290 | int omap_mcbsp_get_dma_op_mode(unsigned int id) | |
291 | { | |
292 | struct omap_mcbsp *mcbsp; | |
293 | int dma_op_mode; | |
294 | ||
295 | if (!omap_mcbsp_check_valid_id(id)) { | |
296 | printk(KERN_ERR "%s: Invalid id (%u)\n", __func__, id + 1); | |
297 | return -ENODEV; | |
298 | } | |
299 | mcbsp = id_to_mcbsp_ptr(id); | |
300 | ||
98cb20e8 | 301 | dma_op_mode = mcbsp->dma_op_mode; |
98cb20e8 PU |
302 | |
303 | return dma_op_mode; | |
304 | } | |
305 | EXPORT_SYMBOL(omap_mcbsp_get_dma_op_mode); | |
2122fdc6 EN |
306 | |
307 | static inline void omap34xx_mcbsp_request(struct omap_mcbsp *mcbsp) | |
308 | { | |
309 | /* | |
310 | * Enable wakup behavior, smart idle and all wakeups | |
311 | * REVISIT: some wakeups may be unnecessary | |
312 | */ | |
313 | if (cpu_is_omap34xx()) { | |
314 | u16 syscon; | |
315 | ||
316 | syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON); | |
2ba93f8f | 317 | syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03)); |
d99a7454 | 318 | |
fa3935ba EN |
319 | if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) { |
320 | syscon |= (ENAWAKEUP | SIDLEMODE(0x02) | | |
321 | CLOCKACTIVITY(0x02)); | |
322 | OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, | |
323 | XRDYEN | RRDYEN); | |
324 | } else { | |
d99a7454 | 325 | syscon |= SIDLEMODE(0x01); |
fa3935ba | 326 | } |
d99a7454 | 327 | |
2122fdc6 | 328 | OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon); |
2122fdc6 EN |
329 | } |
330 | } | |
331 | ||
332 | static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp) | |
333 | { | |
334 | /* | |
335 | * Disable wakup behavior, smart idle and all wakeups | |
336 | */ | |
337 | if (cpu_is_omap34xx()) { | |
338 | u16 syscon; | |
2122fdc6 EN |
339 | |
340 | syscon = OMAP_MCBSP_READ(mcbsp->io_base, SYSCON); | |
2ba93f8f | 341 | syscon &= ~(ENAWAKEUP | SIDLEMODE(0x03) | CLOCKACTIVITY(0x03)); |
72cc6d71 EN |
342 | /* |
343 | * HW bug workaround - If no_idle mode is taken, we need to | |
344 | * go to smart_idle before going to always_idle, or the | |
345 | * device will not hit retention anymore. | |
346 | */ | |
347 | syscon |= SIDLEMODE(0x02); | |
348 | OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon); | |
349 | ||
350 | syscon &= ~(SIDLEMODE(0x03)); | |
2122fdc6 EN |
351 | OMAP_MCBSP_WRITE(mcbsp->io_base, SYSCON, syscon); |
352 | ||
d9a9b3f5 | 353 | OMAP_MCBSP_WRITE(mcbsp->io_base, WAKEUPEN, 0); |
2122fdc6 EN |
354 | } |
355 | } | |
356 | #else | |
357 | static inline void omap34xx_mcbsp_request(struct omap_mcbsp *mcbsp) {} | |
358 | static inline void omap34xx_mcbsp_free(struct omap_mcbsp *mcbsp) {} | |
7aa9ff56 EV |
359 | #endif |
360 | ||
120db2cb TL |
361 | /* |
362 | * We can choose between IRQ based or polled IO. | |
363 | * This needs to be called before omap_mcbsp_request(). | |
364 | */ | |
365 | int omap_mcbsp_set_io_type(unsigned int id, omap_mcbsp_io_type_t io_type) | |
366 | { | |
b4b58f58 CS |
367 | struct omap_mcbsp *mcbsp; |
368 | ||
bc5d0c89 EV |
369 | if (!omap_mcbsp_check_valid_id(id)) { |
370 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
371 | return -ENODEV; | |
372 | } | |
b4b58f58 | 373 | mcbsp = id_to_mcbsp_ptr(id); |
120db2cb | 374 | |
b4b58f58 | 375 | spin_lock(&mcbsp->lock); |
120db2cb | 376 | |
b4b58f58 CS |
377 | if (!mcbsp->free) { |
378 | dev_err(mcbsp->dev, "McBSP%d is currently in use\n", | |
379 | mcbsp->id); | |
380 | spin_unlock(&mcbsp->lock); | |
120db2cb TL |
381 | return -EINVAL; |
382 | } | |
383 | ||
b4b58f58 | 384 | mcbsp->io_type = io_type; |
120db2cb | 385 | |
b4b58f58 | 386 | spin_unlock(&mcbsp->lock); |
120db2cb TL |
387 | |
388 | return 0; | |
389 | } | |
fb78d808 | 390 | EXPORT_SYMBOL(omap_mcbsp_set_io_type); |
5e1c5ff4 | 391 | |
5e1c5ff4 TL |
392 | int omap_mcbsp_request(unsigned int id) |
393 | { | |
b4b58f58 | 394 | struct omap_mcbsp *mcbsp; |
5e1c5ff4 TL |
395 | int err; |
396 | ||
bc5d0c89 EV |
397 | if (!omap_mcbsp_check_valid_id(id)) { |
398 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
399 | return -ENODEV; | |
120db2cb | 400 | } |
b4b58f58 | 401 | mcbsp = id_to_mcbsp_ptr(id); |
bc5d0c89 | 402 | |
b4b58f58 CS |
403 | spin_lock(&mcbsp->lock); |
404 | if (!mcbsp->free) { | |
405 | dev_err(mcbsp->dev, "McBSP%d is currently in use\n", | |
406 | mcbsp->id); | |
407 | spin_unlock(&mcbsp->lock); | |
b820ce4e | 408 | return -EBUSY; |
5e1c5ff4 TL |
409 | } |
410 | ||
b4b58f58 CS |
411 | mcbsp->free = 0; |
412 | spin_unlock(&mcbsp->lock); | |
5e1c5ff4 | 413 | |
b820ce4e RK |
414 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request) |
415 | mcbsp->pdata->ops->request(id); | |
416 | ||
417 | clk_enable(mcbsp->iclk); | |
418 | clk_enable(mcbsp->fclk); | |
419 | ||
2122fdc6 EN |
420 | /* Do procedure specific to omap34xx arch, if applicable */ |
421 | omap34xx_mcbsp_request(mcbsp); | |
422 | ||
5a07055a JN |
423 | /* |
424 | * Make sure that transmitter, receiver and sample-rate generator are | |
425 | * not running before activating IRQs. | |
426 | */ | |
427 | OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR1, 0); | |
428 | OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR2, 0); | |
429 | ||
b4b58f58 | 430 | if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { |
120db2cb | 431 | /* We need to get IRQs here */ |
5a07055a | 432 | init_completion(&mcbsp->tx_irq_completion); |
b4b58f58 CS |
433 | err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, |
434 | 0, "McBSP", (void *)mcbsp); | |
120db2cb | 435 | if (err != 0) { |
b4b58f58 CS |
436 | dev_err(mcbsp->dev, "Unable to request TX IRQ %d " |
437 | "for McBSP%d\n", mcbsp->tx_irq, | |
438 | mcbsp->id); | |
1866b545 | 439 | goto error; |
120db2cb | 440 | } |
5e1c5ff4 | 441 | |
5a07055a | 442 | init_completion(&mcbsp->rx_irq_completion); |
b4b58f58 CS |
443 | err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, |
444 | 0, "McBSP", (void *)mcbsp); | |
120db2cb | 445 | if (err != 0) { |
b4b58f58 CS |
446 | dev_err(mcbsp->dev, "Unable to request RX IRQ %d " |
447 | "for McBSP%d\n", mcbsp->rx_irq, | |
448 | mcbsp->id); | |
1866b545 | 449 | goto tx_irq; |
120db2cb | 450 | } |
5e1c5ff4 TL |
451 | } |
452 | ||
5e1c5ff4 | 453 | return 0; |
1866b545 JK |
454 | tx_irq: |
455 | free_irq(mcbsp->tx_irq, (void *)mcbsp); | |
456 | error: | |
457 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free) | |
458 | mcbsp->pdata->ops->free(id); | |
459 | ||
460 | /* Do procedure specific to omap34xx arch, if applicable */ | |
461 | omap34xx_mcbsp_free(mcbsp); | |
462 | ||
463 | clk_disable(mcbsp->fclk); | |
464 | clk_disable(mcbsp->iclk); | |
465 | ||
466 | mcbsp->free = 1; | |
467 | ||
468 | return err; | |
5e1c5ff4 | 469 | } |
fb78d808 | 470 | EXPORT_SYMBOL(omap_mcbsp_request); |
5e1c5ff4 TL |
471 | |
472 | void omap_mcbsp_free(unsigned int id) | |
473 | { | |
b4b58f58 CS |
474 | struct omap_mcbsp *mcbsp; |
475 | ||
bc5d0c89 EV |
476 | if (!omap_mcbsp_check_valid_id(id)) { |
477 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
5e1c5ff4 | 478 | return; |
120db2cb | 479 | } |
b4b58f58 | 480 | mcbsp = id_to_mcbsp_ptr(id); |
bc5d0c89 | 481 | |
b4b58f58 CS |
482 | if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free) |
483 | mcbsp->pdata->ops->free(id); | |
bc5d0c89 | 484 | |
2122fdc6 EN |
485 | /* Do procedure specific to omap34xx arch, if applicable */ |
486 | omap34xx_mcbsp_free(mcbsp); | |
487 | ||
b820ce4e RK |
488 | clk_disable(mcbsp->fclk); |
489 | clk_disable(mcbsp->iclk); | |
490 | ||
491 | if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { | |
492 | /* Free IRQs */ | |
493 | free_irq(mcbsp->rx_irq, (void *)mcbsp); | |
494 | free_irq(mcbsp->tx_irq, (void *)mcbsp); | |
495 | } | |
5e1c5ff4 | 496 | |
b4b58f58 CS |
497 | spin_lock(&mcbsp->lock); |
498 | if (mcbsp->free) { | |
499 | dev_err(mcbsp->dev, "McBSP%d was not reserved\n", | |
500 | mcbsp->id); | |
501 | spin_unlock(&mcbsp->lock); | |
5e1c5ff4 TL |
502 | return; |
503 | } | |
504 | ||
b4b58f58 CS |
505 | mcbsp->free = 1; |
506 | spin_unlock(&mcbsp->lock); | |
5e1c5ff4 | 507 | } |
fb78d808 | 508 | EXPORT_SYMBOL(omap_mcbsp_free); |
5e1c5ff4 TL |
509 | |
510 | /* | |
c12abc01 JN |
511 | * Here we start the McBSP, by enabling transmitter, receiver or both. |
512 | * If no transmitter or receiver is active prior calling, then sample-rate | |
513 | * generator and frame sync are started. | |
5e1c5ff4 | 514 | */ |
c12abc01 | 515 | void omap_mcbsp_start(unsigned int id, int tx, int rx) |
5e1c5ff4 | 516 | { |
b4b58f58 | 517 | struct omap_mcbsp *mcbsp; |
d592dd1a | 518 | void __iomem *io_base; |
c12abc01 | 519 | int idle; |
5e1c5ff4 TL |
520 | u16 w; |
521 | ||
bc5d0c89 EV |
522 | if (!omap_mcbsp_check_valid_id(id)) { |
523 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
5e1c5ff4 | 524 | return; |
bc5d0c89 | 525 | } |
b4b58f58 CS |
526 | mcbsp = id_to_mcbsp_ptr(id); |
527 | io_base = mcbsp->io_base; | |
5e1c5ff4 | 528 | |
b4b58f58 CS |
529 | mcbsp->rx_word_length = (OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7; |
530 | mcbsp->tx_word_length = (OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7; | |
5e1c5ff4 | 531 | |
c12abc01 JN |
532 | idle = !((OMAP_MCBSP_READ(io_base, SPCR2) | |
533 | OMAP_MCBSP_READ(io_base, SPCR1)) & 1); | |
534 | ||
535 | if (idle) { | |
536 | /* Start the sample generator */ | |
537 | w = OMAP_MCBSP_READ(io_base, SPCR2); | |
538 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6)); | |
539 | } | |
5e1c5ff4 TL |
540 | |
541 | /* Enable transmitter and receiver */ | |
d09a2afc | 542 | tx &= 1; |
5e1c5ff4 | 543 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
d09a2afc | 544 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | tx); |
5e1c5ff4 | 545 | |
d09a2afc | 546 | rx &= 1; |
5e1c5ff4 | 547 | w = OMAP_MCBSP_READ(io_base, SPCR1); |
d09a2afc | 548 | OMAP_MCBSP_WRITE(io_base, SPCR1, w | rx); |
5e1c5ff4 | 549 | |
44a6311c EV |
550 | /* |
551 | * Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec | |
552 | * REVISIT: 100us may give enough time for two CLKSRG, however | |
553 | * due to some unknown PM related, clock gating etc. reason it | |
554 | * is now at 500us. | |
555 | */ | |
556 | udelay(500); | |
5e1c5ff4 | 557 | |
c12abc01 JN |
558 | if (idle) { |
559 | /* Start frame sync */ | |
560 | w = OMAP_MCBSP_READ(io_base, SPCR2); | |
561 | OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7)); | |
562 | } | |
5e1c5ff4 | 563 | |
d09a2afc JN |
564 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { |
565 | /* Release the transmitter and receiver */ | |
566 | w = OMAP_MCBSP_READ(io_base, XCCR); | |
567 | w &= ~(tx ? XDISABLE : 0); | |
568 | OMAP_MCBSP_WRITE(io_base, XCCR, w); | |
569 | w = OMAP_MCBSP_READ(io_base, RCCR); | |
570 | w &= ~(rx ? RDISABLE : 0); | |
571 | OMAP_MCBSP_WRITE(io_base, RCCR, w); | |
572 | } | |
573 | ||
5e1c5ff4 TL |
574 | /* Dump McBSP Regs */ |
575 | omap_mcbsp_dump_reg(id); | |
5e1c5ff4 | 576 | } |
fb78d808 | 577 | EXPORT_SYMBOL(omap_mcbsp_start); |
5e1c5ff4 | 578 | |
c12abc01 | 579 | void omap_mcbsp_stop(unsigned int id, int tx, int rx) |
5e1c5ff4 | 580 | { |
b4b58f58 | 581 | struct omap_mcbsp *mcbsp; |
d592dd1a | 582 | void __iomem *io_base; |
c12abc01 | 583 | int idle; |
5e1c5ff4 TL |
584 | u16 w; |
585 | ||
bc5d0c89 EV |
586 | if (!omap_mcbsp_check_valid_id(id)) { |
587 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
5e1c5ff4 | 588 | return; |
bc5d0c89 | 589 | } |
5e1c5ff4 | 590 | |
b4b58f58 CS |
591 | mcbsp = id_to_mcbsp_ptr(id); |
592 | io_base = mcbsp->io_base; | |
5e1c5ff4 | 593 | |
fb78d808 | 594 | /* Reset transmitter */ |
d09a2afc JN |
595 | tx &= 1; |
596 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { | |
597 | w = OMAP_MCBSP_READ(io_base, XCCR); | |
598 | w |= (tx ? XDISABLE : 0); | |
599 | OMAP_MCBSP_WRITE(io_base, XCCR, w); | |
600 | } | |
5e1c5ff4 | 601 | w = OMAP_MCBSP_READ(io_base, SPCR2); |
d09a2afc | 602 | OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~tx); |
5e1c5ff4 TL |
603 | |
604 | /* Reset receiver */ | |
d09a2afc JN |
605 | rx &= 1; |
606 | if (cpu_is_omap2430() || cpu_is_omap34xx()) { | |
607 | w = OMAP_MCBSP_READ(io_base, RCCR); | |
a93d4ed2 | 608 | w |= (rx ? RDISABLE : 0); |
d09a2afc JN |
609 | OMAP_MCBSP_WRITE(io_base, RCCR, w); |
610 | } | |
5e1c5ff4 | 611 | w = OMAP_MCBSP_READ(io_base, SPCR1); |
d09a2afc | 612 | OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~rx); |
5e1c5ff4 | 613 | |
c12abc01 JN |
614 | idle = !((OMAP_MCBSP_READ(io_base, SPCR2) | |
615 | OMAP_MCBSP_READ(io_base, SPCR1)) & 1); | |
616 | ||
617 | if (idle) { | |
618 | /* Reset the sample rate generator */ | |
619 | w = OMAP_MCBSP_READ(io_base, SPCR2); | |
620 | OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6)); | |
621 | } | |
5e1c5ff4 | 622 | } |
fb78d808 | 623 | EXPORT_SYMBOL(omap_mcbsp_stop); |
5e1c5ff4 | 624 | |
bb13b5fd TL |
625 | /* polled mcbsp i/o operations */ |
626 | int omap_mcbsp_pollwrite(unsigned int id, u16 buf) | |
627 | { | |
b4b58f58 | 628 | struct omap_mcbsp *mcbsp; |
d592dd1a | 629 | void __iomem *base; |
bc5d0c89 EV |
630 | |
631 | if (!omap_mcbsp_check_valid_id(id)) { | |
632 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
633 | return -ENODEV; | |
634 | } | |
635 | ||
b4b58f58 CS |
636 | mcbsp = id_to_mcbsp_ptr(id); |
637 | base = mcbsp->io_base; | |
638 | ||
bb13b5fd TL |
639 | writew(buf, base + OMAP_MCBSP_REG_DXR1); |
640 | /* if frame sync error - clear the error */ | |
641 | if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) { | |
642 | /* clear error */ | |
643 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR), | |
644 | base + OMAP_MCBSP_REG_SPCR2); | |
645 | /* resend */ | |
646 | return -1; | |
647 | } else { | |
648 | /* wait for transmit confirmation */ | |
649 | int attemps = 0; | |
650 | while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) { | |
651 | if (attemps++ > 1000) { | |
652 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) & | |
653 | (~XRST), | |
654 | base + OMAP_MCBSP_REG_SPCR2); | |
655 | udelay(10); | |
656 | writew(readw(base + OMAP_MCBSP_REG_SPCR2) | | |
657 | (XRST), | |
658 | base + OMAP_MCBSP_REG_SPCR2); | |
659 | udelay(10); | |
b4b58f58 CS |
660 | dev_err(mcbsp->dev, "Could not write to" |
661 | " McBSP%d Register\n", mcbsp->id); | |
bb13b5fd TL |
662 | return -2; |
663 | } | |
664 | } | |
665 | } | |
fb78d808 | 666 | |
bb13b5fd TL |
667 | return 0; |
668 | } | |
fb78d808 | 669 | EXPORT_SYMBOL(omap_mcbsp_pollwrite); |
bb13b5fd | 670 | |
fb78d808 | 671 | int omap_mcbsp_pollread(unsigned int id, u16 *buf) |
bb13b5fd | 672 | { |
b4b58f58 | 673 | struct omap_mcbsp *mcbsp; |
d592dd1a | 674 | void __iomem *base; |
bc5d0c89 EV |
675 | |
676 | if (!omap_mcbsp_check_valid_id(id)) { | |
677 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
678 | return -ENODEV; | |
679 | } | |
b4b58f58 | 680 | mcbsp = id_to_mcbsp_ptr(id); |
bc5d0c89 | 681 | |
b4b58f58 | 682 | base = mcbsp->io_base; |
bb13b5fd TL |
683 | /* if frame sync error - clear the error */ |
684 | if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) { | |
685 | /* clear error */ | |
686 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR), | |
687 | base + OMAP_MCBSP_REG_SPCR1); | |
688 | /* resend */ | |
689 | return -1; | |
690 | } else { | |
691 | /* wait for recieve confirmation */ | |
692 | int attemps = 0; | |
693 | while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) { | |
694 | if (attemps++ > 1000) { | |
695 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) & | |
696 | (~RRST), | |
697 | base + OMAP_MCBSP_REG_SPCR1); | |
698 | udelay(10); | |
699 | writew(readw(base + OMAP_MCBSP_REG_SPCR1) | | |
700 | (RRST), | |
701 | base + OMAP_MCBSP_REG_SPCR1); | |
702 | udelay(10); | |
b4b58f58 CS |
703 | dev_err(mcbsp->dev, "Could not read from" |
704 | " McBSP%d Register\n", mcbsp->id); | |
bb13b5fd TL |
705 | return -2; |
706 | } | |
707 | } | |
708 | } | |
709 | *buf = readw(base + OMAP_MCBSP_REG_DRR1); | |
fb78d808 | 710 | |
bb13b5fd TL |
711 | return 0; |
712 | } | |
fb78d808 | 713 | EXPORT_SYMBOL(omap_mcbsp_pollread); |
bb13b5fd | 714 | |
5e1c5ff4 TL |
715 | /* |
716 | * IRQ based word transmission. | |
717 | */ | |
718 | void omap_mcbsp_xmit_word(unsigned int id, u32 word) | |
719 | { | |
b4b58f58 | 720 | struct omap_mcbsp *mcbsp; |
d592dd1a | 721 | void __iomem *io_base; |
bc5d0c89 | 722 | omap_mcbsp_word_length word_length; |
5e1c5ff4 | 723 | |
bc5d0c89 EV |
724 | if (!omap_mcbsp_check_valid_id(id)) { |
725 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
5e1c5ff4 | 726 | return; |
bc5d0c89 | 727 | } |
5e1c5ff4 | 728 | |
b4b58f58 CS |
729 | mcbsp = id_to_mcbsp_ptr(id); |
730 | io_base = mcbsp->io_base; | |
731 | word_length = mcbsp->tx_word_length; | |
5e1c5ff4 | 732 | |
b4b58f58 | 733 | wait_for_completion(&mcbsp->tx_irq_completion); |
5e1c5ff4 TL |
734 | |
735 | if (word_length > OMAP_MCBSP_WORD_16) | |
736 | OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16); | |
737 | OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff); | |
738 | } | |
fb78d808 | 739 | EXPORT_SYMBOL(omap_mcbsp_xmit_word); |
5e1c5ff4 TL |
740 | |
741 | u32 omap_mcbsp_recv_word(unsigned int id) | |
742 | { | |
b4b58f58 | 743 | struct omap_mcbsp *mcbsp; |
d592dd1a | 744 | void __iomem *io_base; |
5e1c5ff4 | 745 | u16 word_lsb, word_msb = 0; |
bc5d0c89 | 746 | omap_mcbsp_word_length word_length; |
5e1c5ff4 | 747 | |
bc5d0c89 EV |
748 | if (!omap_mcbsp_check_valid_id(id)) { |
749 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
750 | return -ENODEV; | |
751 | } | |
b4b58f58 | 752 | mcbsp = id_to_mcbsp_ptr(id); |
5e1c5ff4 | 753 | |
b4b58f58 CS |
754 | word_length = mcbsp->rx_word_length; |
755 | io_base = mcbsp->io_base; | |
5e1c5ff4 | 756 | |
b4b58f58 | 757 | wait_for_completion(&mcbsp->rx_irq_completion); |
5e1c5ff4 TL |
758 | |
759 | if (word_length > OMAP_MCBSP_WORD_16) | |
760 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); | |
761 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); | |
762 | ||
763 | return (word_lsb | (word_msb << 16)); | |
764 | } | |
fb78d808 | 765 | EXPORT_SYMBOL(omap_mcbsp_recv_word); |
5e1c5ff4 | 766 | |
120db2cb TL |
767 | int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word) |
768 | { | |
b4b58f58 | 769 | struct omap_mcbsp *mcbsp; |
d592dd1a | 770 | void __iomem *io_base; |
bc5d0c89 EV |
771 | omap_mcbsp_word_length tx_word_length; |
772 | omap_mcbsp_word_length rx_word_length; | |
120db2cb TL |
773 | u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0; |
774 | ||
bc5d0c89 EV |
775 | if (!omap_mcbsp_check_valid_id(id)) { |
776 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
777 | return -ENODEV; | |
778 | } | |
b4b58f58 CS |
779 | mcbsp = id_to_mcbsp_ptr(id); |
780 | io_base = mcbsp->io_base; | |
781 | tx_word_length = mcbsp->tx_word_length; | |
782 | rx_word_length = mcbsp->rx_word_length; | |
bc5d0c89 | 783 | |
120db2cb TL |
784 | if (tx_word_length != rx_word_length) |
785 | return -EINVAL; | |
786 | ||
787 | /* First we wait for the transmitter to be ready */ | |
788 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); | |
789 | while (!(spcr2 & XRDY)) { | |
790 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); | |
791 | if (attempts++ > 1000) { | |
792 | /* We must reset the transmitter */ | |
793 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 & (~XRST)); | |
794 | udelay(10); | |
795 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST); | |
796 | udelay(10); | |
b4b58f58 CS |
797 | dev_err(mcbsp->dev, "McBSP%d transmitter not " |
798 | "ready\n", mcbsp->id); | |
120db2cb TL |
799 | return -EAGAIN; |
800 | } | |
801 | } | |
802 | ||
803 | /* Now we can push the data */ | |
804 | if (tx_word_length > OMAP_MCBSP_WORD_16) | |
805 | OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16); | |
806 | OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff); | |
807 | ||
808 | /* We wait for the receiver to be ready */ | |
809 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); | |
810 | while (!(spcr1 & RRDY)) { | |
811 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); | |
812 | if (attempts++ > 1000) { | |
813 | /* We must reset the receiver */ | |
814 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 & (~RRST)); | |
815 | udelay(10); | |
816 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST); | |
817 | udelay(10); | |
b4b58f58 CS |
818 | dev_err(mcbsp->dev, "McBSP%d receiver not " |
819 | "ready\n", mcbsp->id); | |
120db2cb TL |
820 | return -EAGAIN; |
821 | } | |
822 | } | |
823 | ||
824 | /* Receiver is ready, let's read the dummy data */ | |
825 | if (rx_word_length > OMAP_MCBSP_WORD_16) | |
826 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); | |
827 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); | |
828 | ||
829 | return 0; | |
830 | } | |
fb78d808 | 831 | EXPORT_SYMBOL(omap_mcbsp_spi_master_xmit_word_poll); |
120db2cb | 832 | |
fb78d808 | 833 | int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word) |
120db2cb | 834 | { |
b4b58f58 | 835 | struct omap_mcbsp *mcbsp; |
d592dd1a RK |
836 | u32 clock_word = 0; |
837 | void __iomem *io_base; | |
bc5d0c89 EV |
838 | omap_mcbsp_word_length tx_word_length; |
839 | omap_mcbsp_word_length rx_word_length; | |
120db2cb TL |
840 | u16 spcr2, spcr1, attempts = 0, word_lsb, word_msb = 0; |
841 | ||
bc5d0c89 EV |
842 | if (!omap_mcbsp_check_valid_id(id)) { |
843 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
844 | return -ENODEV; | |
845 | } | |
846 | ||
b4b58f58 CS |
847 | mcbsp = id_to_mcbsp_ptr(id); |
848 | io_base = mcbsp->io_base; | |
849 | ||
850 | tx_word_length = mcbsp->tx_word_length; | |
851 | rx_word_length = mcbsp->rx_word_length; | |
bc5d0c89 | 852 | |
120db2cb TL |
853 | if (tx_word_length != rx_word_length) |
854 | return -EINVAL; | |
855 | ||
856 | /* First we wait for the transmitter to be ready */ | |
857 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); | |
858 | while (!(spcr2 & XRDY)) { | |
859 | spcr2 = OMAP_MCBSP_READ(io_base, SPCR2); | |
860 | if (attempts++ > 1000) { | |
861 | /* We must reset the transmitter */ | |
862 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 & (~XRST)); | |
863 | udelay(10); | |
864 | OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST); | |
865 | udelay(10); | |
b4b58f58 CS |
866 | dev_err(mcbsp->dev, "McBSP%d transmitter not " |
867 | "ready\n", mcbsp->id); | |
120db2cb TL |
868 | return -EAGAIN; |
869 | } | |
870 | } | |
871 | ||
872 | /* We first need to enable the bus clock */ | |
873 | if (tx_word_length > OMAP_MCBSP_WORD_16) | |
874 | OMAP_MCBSP_WRITE(io_base, DXR2, clock_word >> 16); | |
875 | OMAP_MCBSP_WRITE(io_base, DXR1, clock_word & 0xffff); | |
876 | ||
877 | /* We wait for the receiver to be ready */ | |
878 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); | |
879 | while (!(spcr1 & RRDY)) { | |
880 | spcr1 = OMAP_MCBSP_READ(io_base, SPCR1); | |
881 | if (attempts++ > 1000) { | |
882 | /* We must reset the receiver */ | |
883 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 & (~RRST)); | |
884 | udelay(10); | |
885 | OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST); | |
886 | udelay(10); | |
b4b58f58 CS |
887 | dev_err(mcbsp->dev, "McBSP%d receiver not " |
888 | "ready\n", mcbsp->id); | |
120db2cb TL |
889 | return -EAGAIN; |
890 | } | |
891 | } | |
892 | ||
893 | /* Receiver is ready, there is something for us */ | |
894 | if (rx_word_length > OMAP_MCBSP_WORD_16) | |
895 | word_msb = OMAP_MCBSP_READ(io_base, DRR2); | |
896 | word_lsb = OMAP_MCBSP_READ(io_base, DRR1); | |
897 | ||
898 | word[0] = (word_lsb | (word_msb << 16)); | |
899 | ||
900 | return 0; | |
901 | } | |
fb78d808 | 902 | EXPORT_SYMBOL(omap_mcbsp_spi_master_recv_word_poll); |
120db2cb | 903 | |
5e1c5ff4 TL |
904 | /* |
905 | * Simple DMA based buffer rx/tx routines. | |
906 | * Nothing fancy, just a single buffer tx/rx through DMA. | |
907 | * The DMA resources are released once the transfer is done. | |
908 | * For anything fancier, you should use your own customized DMA | |
909 | * routines and callbacks. | |
910 | */ | |
fb78d808 EV |
911 | int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, |
912 | unsigned int length) | |
5e1c5ff4 | 913 | { |
b4b58f58 | 914 | struct omap_mcbsp *mcbsp; |
5e1c5ff4 | 915 | int dma_tx_ch; |
120db2cb TL |
916 | int src_port = 0; |
917 | int dest_port = 0; | |
918 | int sync_dev = 0; | |
5e1c5ff4 | 919 | |
bc5d0c89 EV |
920 | if (!omap_mcbsp_check_valid_id(id)) { |
921 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
922 | return -ENODEV; | |
923 | } | |
b4b58f58 | 924 | mcbsp = id_to_mcbsp_ptr(id); |
5e1c5ff4 | 925 | |
b4b58f58 | 926 | if (omap_request_dma(mcbsp->dma_tx_sync, "McBSP TX", |
fb78d808 | 927 | omap_mcbsp_tx_dma_callback, |
b4b58f58 | 928 | mcbsp, |
fb78d808 | 929 | &dma_tx_ch)) { |
b4b58f58 | 930 | dev_err(mcbsp->dev, " Unable to request DMA channel for " |
bc5d0c89 | 931 | "McBSP%d TX. Trying IRQ based TX\n", |
b4b58f58 | 932 | mcbsp->id); |
5e1c5ff4 TL |
933 | return -EAGAIN; |
934 | } | |
b4b58f58 | 935 | mcbsp->dma_tx_lch = dma_tx_ch; |
5e1c5ff4 | 936 | |
b4b58f58 | 937 | dev_err(mcbsp->dev, "McBSP%d TX DMA on channel %d\n", mcbsp->id, |
bc5d0c89 | 938 | dma_tx_ch); |
5e1c5ff4 | 939 | |
b4b58f58 | 940 | init_completion(&mcbsp->tx_dma_completion); |
5e1c5ff4 | 941 | |
120db2cb TL |
942 | if (cpu_class_is_omap1()) { |
943 | src_port = OMAP_DMA_PORT_TIPB; | |
944 | dest_port = OMAP_DMA_PORT_EMIFF; | |
945 | } | |
bc5d0c89 | 946 | if (cpu_class_is_omap2()) |
b4b58f58 | 947 | sync_dev = mcbsp->dma_tx_sync; |
120db2cb | 948 | |
b4b58f58 | 949 | omap_set_dma_transfer_params(mcbsp->dma_tx_lch, |
5e1c5ff4 TL |
950 | OMAP_DMA_DATA_TYPE_S16, |
951 | length >> 1, 1, | |
1a8bfa1e | 952 | OMAP_DMA_SYNC_ELEMENT, |
120db2cb | 953 | sync_dev, 0); |
5e1c5ff4 | 954 | |
b4b58f58 | 955 | omap_set_dma_dest_params(mcbsp->dma_tx_lch, |
120db2cb | 956 | src_port, |
5e1c5ff4 | 957 | OMAP_DMA_AMODE_CONSTANT, |
b4b58f58 | 958 | mcbsp->phys_base + OMAP_MCBSP_REG_DXR1, |
1a8bfa1e | 959 | 0, 0); |
5e1c5ff4 | 960 | |
b4b58f58 | 961 | omap_set_dma_src_params(mcbsp->dma_tx_lch, |
120db2cb | 962 | dest_port, |
5e1c5ff4 | 963 | OMAP_DMA_AMODE_POST_INC, |
1a8bfa1e TL |
964 | buffer, |
965 | 0, 0); | |
5e1c5ff4 | 966 | |
b4b58f58 CS |
967 | omap_start_dma(mcbsp->dma_tx_lch); |
968 | wait_for_completion(&mcbsp->tx_dma_completion); | |
fb78d808 | 969 | |
5e1c5ff4 TL |
970 | return 0; |
971 | } | |
fb78d808 | 972 | EXPORT_SYMBOL(omap_mcbsp_xmit_buffer); |
5e1c5ff4 | 973 | |
fb78d808 EV |
974 | int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, |
975 | unsigned int length) | |
5e1c5ff4 | 976 | { |
b4b58f58 | 977 | struct omap_mcbsp *mcbsp; |
5e1c5ff4 | 978 | int dma_rx_ch; |
120db2cb TL |
979 | int src_port = 0; |
980 | int dest_port = 0; | |
981 | int sync_dev = 0; | |
5e1c5ff4 | 982 | |
bc5d0c89 EV |
983 | if (!omap_mcbsp_check_valid_id(id)) { |
984 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
985 | return -ENODEV; | |
986 | } | |
b4b58f58 | 987 | mcbsp = id_to_mcbsp_ptr(id); |
5e1c5ff4 | 988 | |
b4b58f58 | 989 | if (omap_request_dma(mcbsp->dma_rx_sync, "McBSP RX", |
fb78d808 | 990 | omap_mcbsp_rx_dma_callback, |
b4b58f58 | 991 | mcbsp, |
fb78d808 | 992 | &dma_rx_ch)) { |
b4b58f58 | 993 | dev_err(mcbsp->dev, "Unable to request DMA channel for " |
bc5d0c89 | 994 | "McBSP%d RX. Trying IRQ based RX\n", |
b4b58f58 | 995 | mcbsp->id); |
5e1c5ff4 TL |
996 | return -EAGAIN; |
997 | } | |
b4b58f58 | 998 | mcbsp->dma_rx_lch = dma_rx_ch; |
5e1c5ff4 | 999 | |
b4b58f58 | 1000 | dev_err(mcbsp->dev, "McBSP%d RX DMA on channel %d\n", mcbsp->id, |
bc5d0c89 | 1001 | dma_rx_ch); |
5e1c5ff4 | 1002 | |
b4b58f58 | 1003 | init_completion(&mcbsp->rx_dma_completion); |
5e1c5ff4 | 1004 | |
120db2cb TL |
1005 | if (cpu_class_is_omap1()) { |
1006 | src_port = OMAP_DMA_PORT_TIPB; | |
1007 | dest_port = OMAP_DMA_PORT_EMIFF; | |
1008 | } | |
bc5d0c89 | 1009 | if (cpu_class_is_omap2()) |
b4b58f58 | 1010 | sync_dev = mcbsp->dma_rx_sync; |
120db2cb | 1011 | |
b4b58f58 | 1012 | omap_set_dma_transfer_params(mcbsp->dma_rx_lch, |
fb78d808 EV |
1013 | OMAP_DMA_DATA_TYPE_S16, |
1014 | length >> 1, 1, | |
1015 | OMAP_DMA_SYNC_ELEMENT, | |
1016 | sync_dev, 0); | |
5e1c5ff4 | 1017 | |
b4b58f58 | 1018 | omap_set_dma_src_params(mcbsp->dma_rx_lch, |
120db2cb | 1019 | src_port, |
5e1c5ff4 | 1020 | OMAP_DMA_AMODE_CONSTANT, |
b4b58f58 | 1021 | mcbsp->phys_base + OMAP_MCBSP_REG_DRR1, |
1a8bfa1e | 1022 | 0, 0); |
5e1c5ff4 | 1023 | |
b4b58f58 | 1024 | omap_set_dma_dest_params(mcbsp->dma_rx_lch, |
fb78d808 EV |
1025 | dest_port, |
1026 | OMAP_DMA_AMODE_POST_INC, | |
1027 | buffer, | |
1028 | 0, 0); | |
5e1c5ff4 | 1029 | |
b4b58f58 CS |
1030 | omap_start_dma(mcbsp->dma_rx_lch); |
1031 | wait_for_completion(&mcbsp->rx_dma_completion); | |
fb78d808 | 1032 | |
5e1c5ff4 TL |
1033 | return 0; |
1034 | } | |
fb78d808 | 1035 | EXPORT_SYMBOL(omap_mcbsp_recv_buffer); |
5e1c5ff4 TL |
1036 | |
1037 | /* | |
1038 | * SPI wrapper. | |
1039 | * Since SPI setup is much simpler than the generic McBSP one, | |
1040 | * this wrapper just need an omap_mcbsp_spi_cfg structure as an input. | |
1041 | * Once this is done, you can call omap_mcbsp_start(). | |
1042 | */ | |
fb78d808 EV |
1043 | void omap_mcbsp_set_spi_mode(unsigned int id, |
1044 | const struct omap_mcbsp_spi_cfg *spi_cfg) | |
5e1c5ff4 | 1045 | { |
b4b58f58 | 1046 | struct omap_mcbsp *mcbsp; |
5e1c5ff4 TL |
1047 | struct omap_mcbsp_reg_cfg mcbsp_cfg; |
1048 | ||
bc5d0c89 EV |
1049 | if (!omap_mcbsp_check_valid_id(id)) { |
1050 | printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1); | |
5e1c5ff4 | 1051 | return; |
bc5d0c89 | 1052 | } |
b4b58f58 | 1053 | mcbsp = id_to_mcbsp_ptr(id); |
5e1c5ff4 TL |
1054 | |
1055 | memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg)); | |
1056 | ||
1057 | /* SPI has only one frame */ | |
1058 | mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0)); | |
1059 | mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0)); | |
1060 | ||
fb78d808 | 1061 | /* Clock stop mode */ |
5e1c5ff4 TL |
1062 | if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY) |
1063 | mcbsp_cfg.spcr1 |= (1 << 12); | |
1064 | else | |
1065 | mcbsp_cfg.spcr1 |= (3 << 11); | |
1066 | ||
1067 | /* Set clock parities */ | |
1068 | if (spi_cfg->rx_clock_polarity == OMAP_MCBSP_CLK_RISING) | |
1069 | mcbsp_cfg.pcr0 |= CLKRP; | |
1070 | else | |
1071 | mcbsp_cfg.pcr0 &= ~CLKRP; | |
1072 | ||
1073 | if (spi_cfg->tx_clock_polarity == OMAP_MCBSP_CLK_RISING) | |
1074 | mcbsp_cfg.pcr0 &= ~CLKXP; | |
1075 | else | |
1076 | mcbsp_cfg.pcr0 |= CLKXP; | |
1077 | ||
1078 | /* Set SCLKME to 0 and CLKSM to 1 */ | |
1079 | mcbsp_cfg.pcr0 &= ~SCLKME; | |
1080 | mcbsp_cfg.srgr2 |= CLKSM; | |
1081 | ||
1082 | /* Set FSXP */ | |
1083 | if (spi_cfg->fsx_polarity == OMAP_MCBSP_FS_ACTIVE_HIGH) | |
1084 | mcbsp_cfg.pcr0 &= ~FSXP; | |
1085 | else | |
1086 | mcbsp_cfg.pcr0 |= FSXP; | |
1087 | ||
1088 | if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) { | |
1089 | mcbsp_cfg.pcr0 |= CLKXM; | |
fb78d808 | 1090 | mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div - 1); |
5e1c5ff4 TL |
1091 | mcbsp_cfg.pcr0 |= FSXM; |
1092 | mcbsp_cfg.srgr2 &= ~FSGM; | |
1093 | mcbsp_cfg.xcr2 |= XDATDLY(1); | |
1094 | mcbsp_cfg.rcr2 |= RDATDLY(1); | |
fb78d808 | 1095 | } else { |
5e1c5ff4 TL |
1096 | mcbsp_cfg.pcr0 &= ~CLKXM; |
1097 | mcbsp_cfg.srgr1 |= CLKGDV(1); | |
1098 | mcbsp_cfg.pcr0 &= ~FSXM; | |
1099 | mcbsp_cfg.xcr2 &= ~XDATDLY(3); | |
1100 | mcbsp_cfg.rcr2 &= ~RDATDLY(3); | |
1101 | } | |
1102 | ||
1103 | mcbsp_cfg.xcr2 &= ~XPHASE; | |
1104 | mcbsp_cfg.rcr2 &= ~RPHASE; | |
1105 | ||
1106 | omap_mcbsp_config(id, &mcbsp_cfg); | |
1107 | } | |
fb78d808 | 1108 | EXPORT_SYMBOL(omap_mcbsp_set_spi_mode); |
5e1c5ff4 | 1109 | |
a1a56f5f EV |
1110 | #ifdef CONFIG_ARCH_OMAP34XX |
1111 | #define max_thres(m) (mcbsp->pdata->buffer_size) | |
1112 | #define valid_threshold(m, val) ((val) <= max_thres(m)) | |
1113 | #define THRESHOLD_PROP_BUILDER(prop) \ | |
1114 | static ssize_t prop##_show(struct device *dev, \ | |
1115 | struct device_attribute *attr, char *buf) \ | |
1116 | { \ | |
1117 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \ | |
1118 | \ | |
1119 | return sprintf(buf, "%u\n", mcbsp->prop); \ | |
1120 | } \ | |
1121 | \ | |
1122 | static ssize_t prop##_store(struct device *dev, \ | |
1123 | struct device_attribute *attr, \ | |
1124 | const char *buf, size_t size) \ | |
1125 | { \ | |
1126 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \ | |
1127 | unsigned long val; \ | |
1128 | int status; \ | |
1129 | \ | |
1130 | status = strict_strtoul(buf, 0, &val); \ | |
1131 | if (status) \ | |
1132 | return status; \ | |
1133 | \ | |
1134 | if (!valid_threshold(mcbsp, val)) \ | |
1135 | return -EDOM; \ | |
1136 | \ | |
1137 | mcbsp->prop = val; \ | |
1138 | return size; \ | |
1139 | } \ | |
1140 | \ | |
1141 | static DEVICE_ATTR(prop, 0644, prop##_show, prop##_store); | |
1142 | ||
1143 | THRESHOLD_PROP_BUILDER(max_tx_thres); | |
1144 | THRESHOLD_PROP_BUILDER(max_rx_thres); | |
1145 | ||
9b300509 JN |
1146 | static const char *dma_op_modes[] = { |
1147 | "element", "threshold", "frame", | |
1148 | }; | |
1149 | ||
98cb20e8 PU |
1150 | static ssize_t dma_op_mode_show(struct device *dev, |
1151 | struct device_attribute *attr, char *buf) | |
1152 | { | |
1153 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); | |
9b300509 JN |
1154 | int dma_op_mode, i = 0; |
1155 | ssize_t len = 0; | |
1156 | const char * const *s; | |
98cb20e8 | 1157 | |
98cb20e8 | 1158 | dma_op_mode = mcbsp->dma_op_mode; |
98cb20e8 | 1159 | |
9b300509 JN |
1160 | for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) { |
1161 | if (dma_op_mode == i) | |
1162 | len += sprintf(buf + len, "[%s] ", *s); | |
1163 | else | |
1164 | len += sprintf(buf + len, "%s ", *s); | |
1165 | } | |
1166 | len += sprintf(buf + len, "\n"); | |
1167 | ||
1168 | return len; | |
98cb20e8 PU |
1169 | } |
1170 | ||
1171 | static ssize_t dma_op_mode_store(struct device *dev, | |
1172 | struct device_attribute *attr, | |
1173 | const char *buf, size_t size) | |
1174 | { | |
1175 | struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); | |
9b300509 JN |
1176 | const char * const *s; |
1177 | int i = 0; | |
98cb20e8 | 1178 | |
9b300509 JN |
1179 | for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) |
1180 | if (sysfs_streq(buf, *s)) | |
1181 | break; | |
98cb20e8 | 1182 | |
9b300509 JN |
1183 | if (i == ARRAY_SIZE(dma_op_modes)) |
1184 | return -EINVAL; | |
98cb20e8 | 1185 | |
9b300509 | 1186 | spin_lock_irq(&mcbsp->lock); |
98cb20e8 PU |
1187 | if (!mcbsp->free) { |
1188 | size = -EBUSY; | |
1189 | goto unlock; | |
1190 | } | |
9b300509 | 1191 | mcbsp->dma_op_mode = i; |
98cb20e8 PU |
1192 | |
1193 | unlock: | |
1194 | spin_unlock_irq(&mcbsp->lock); | |
1195 | ||
1196 | return size; | |
1197 | } | |
1198 | ||
1199 | static DEVICE_ATTR(dma_op_mode, 0644, dma_op_mode_show, dma_op_mode_store); | |
1200 | ||
4c8200ae | 1201 | static const struct attribute *additional_attrs[] = { |
a1a56f5f EV |
1202 | &dev_attr_max_tx_thres.attr, |
1203 | &dev_attr_max_rx_thres.attr, | |
98cb20e8 | 1204 | &dev_attr_dma_op_mode.attr, |
a1a56f5f EV |
1205 | NULL, |
1206 | }; | |
1207 | ||
4c8200ae EV |
1208 | static const struct attribute_group additional_attr_group = { |
1209 | .attrs = (struct attribute **)additional_attrs, | |
a1a56f5f EV |
1210 | }; |
1211 | ||
4c8200ae | 1212 | static inline int __devinit omap_additional_add(struct device *dev) |
a1a56f5f | 1213 | { |
4c8200ae | 1214 | return sysfs_create_group(&dev->kobj, &additional_attr_group); |
a1a56f5f EV |
1215 | } |
1216 | ||
4c8200ae | 1217 | static inline void __devexit omap_additional_remove(struct device *dev) |
a1a56f5f | 1218 | { |
4c8200ae | 1219 | sysfs_remove_group(&dev->kobj, &additional_attr_group); |
a1a56f5f EV |
1220 | } |
1221 | ||
1222 | static inline void __devinit omap34xx_device_init(struct omap_mcbsp *mcbsp) | |
1223 | { | |
98cb20e8 | 1224 | mcbsp->dma_op_mode = MCBSP_DMA_MODE_ELEMENT; |
a1a56f5f EV |
1225 | if (cpu_is_omap34xx()) { |
1226 | mcbsp->max_tx_thres = max_thres(mcbsp); | |
1227 | mcbsp->max_rx_thres = max_thres(mcbsp); | |
98cb20e8 PU |
1228 | /* |
1229 | * REVISIT: Set dmap_op_mode to THRESHOLD as default | |
1230 | * for mcbsp2 instances. | |
1231 | */ | |
4c8200ae | 1232 | if (omap_additional_add(mcbsp->dev)) |
a1a56f5f | 1233 | dev_warn(mcbsp->dev, |
4c8200ae | 1234 | "Unable to create additional controls\n"); |
a1a56f5f EV |
1235 | } else { |
1236 | mcbsp->max_tx_thres = -EINVAL; | |
1237 | mcbsp->max_rx_thres = -EINVAL; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | static inline void __devexit omap34xx_device_exit(struct omap_mcbsp *mcbsp) | |
1242 | { | |
1243 | if (cpu_is_omap34xx()) | |
4c8200ae | 1244 | omap_additional_remove(mcbsp->dev); |
a1a56f5f EV |
1245 | } |
1246 | #else | |
1247 | static inline void __devinit omap34xx_device_init(struct omap_mcbsp *mcbsp) {} | |
1248 | static inline void __devexit omap34xx_device_exit(struct omap_mcbsp *mcbsp) {} | |
1249 | #endif /* CONFIG_ARCH_OMAP34XX */ | |
1250 | ||
5e1c5ff4 TL |
1251 | /* |
1252 | * McBSP1 and McBSP3 are directly mapped on 1610 and 1510. | |
1253 | * 730 has only 2 McBSP, and both of them are MPU peripherals. | |
1254 | */ | |
25cef225 | 1255 | static int __devinit omap_mcbsp_probe(struct platform_device *pdev) |
bc5d0c89 EV |
1256 | { |
1257 | struct omap_mcbsp_platform_data *pdata = pdev->dev.platform_data; | |
b4b58f58 | 1258 | struct omap_mcbsp *mcbsp; |
bc5d0c89 EV |
1259 | int id = pdev->id - 1; |
1260 | int ret = 0; | |
5e1c5ff4 | 1261 | |
bc5d0c89 EV |
1262 | if (!pdata) { |
1263 | dev_err(&pdev->dev, "McBSP device initialized without" | |
1264 | "platform data\n"); | |
1265 | ret = -EINVAL; | |
1266 | goto exit; | |
1267 | } | |
1268 | ||
1269 | dev_dbg(&pdev->dev, "Initializing OMAP McBSP (%d).\n", pdev->id); | |
1270 | ||
b4b58f58 | 1271 | if (id >= omap_mcbsp_count) { |
bc5d0c89 EV |
1272 | dev_err(&pdev->dev, "Invalid McBSP device id (%d)\n", id); |
1273 | ret = -EINVAL; | |
1274 | goto exit; | |
1275 | } | |
1276 | ||
b4b58f58 CS |
1277 | mcbsp = kzalloc(sizeof(struct omap_mcbsp), GFP_KERNEL); |
1278 | if (!mcbsp) { | |
1279 | ret = -ENOMEM; | |
1280 | goto exit; | |
1281 | } | |
b4b58f58 CS |
1282 | |
1283 | spin_lock_init(&mcbsp->lock); | |
1284 | mcbsp->id = id + 1; | |
1285 | mcbsp->free = 1; | |
1286 | mcbsp->dma_tx_lch = -1; | |
1287 | mcbsp->dma_rx_lch = -1; | |
bc5d0c89 | 1288 | |
b4b58f58 CS |
1289 | mcbsp->phys_base = pdata->phys_base; |
1290 | mcbsp->io_base = ioremap(pdata->phys_base, SZ_4K); | |
1291 | if (!mcbsp->io_base) { | |
d592dd1a RK |
1292 | ret = -ENOMEM; |
1293 | goto err_ioremap; | |
1294 | } | |
1295 | ||
bc5d0c89 | 1296 | /* Default I/O is IRQ based */ |
b4b58f58 CS |
1297 | mcbsp->io_type = OMAP_MCBSP_IRQ_IO; |
1298 | mcbsp->tx_irq = pdata->tx_irq; | |
1299 | mcbsp->rx_irq = pdata->rx_irq; | |
1300 | mcbsp->dma_rx_sync = pdata->dma_rx_sync; | |
1301 | mcbsp->dma_tx_sync = pdata->dma_tx_sync; | |
bc5d0c89 | 1302 | |
b820ce4e RK |
1303 | mcbsp->iclk = clk_get(&pdev->dev, "ick"); |
1304 | if (IS_ERR(mcbsp->iclk)) { | |
1305 | ret = PTR_ERR(mcbsp->iclk); | |
1306 | dev_err(&pdev->dev, "unable to get ick: %d\n", ret); | |
1307 | goto err_iclk; | |
1308 | } | |
06151158 | 1309 | |
b820ce4e RK |
1310 | mcbsp->fclk = clk_get(&pdev->dev, "fck"); |
1311 | if (IS_ERR(mcbsp->fclk)) { | |
1312 | ret = PTR_ERR(mcbsp->fclk); | |
1313 | dev_err(&pdev->dev, "unable to get fck: %d\n", ret); | |
1314 | goto err_fclk; | |
bc5d0c89 EV |
1315 | } |
1316 | ||
b4b58f58 CS |
1317 | mcbsp->pdata = pdata; |
1318 | mcbsp->dev = &pdev->dev; | |
b820ce4e | 1319 | mcbsp_ptr[id] = mcbsp; |
b4b58f58 | 1320 | platform_set_drvdata(pdev, mcbsp); |
a1a56f5f EV |
1321 | |
1322 | /* Initialize mcbsp properties for OMAP34XX if needed / applicable */ | |
1323 | omap34xx_device_init(mcbsp); | |
1324 | ||
d592dd1a | 1325 | return 0; |
bc5d0c89 | 1326 | |
b820ce4e RK |
1327 | err_fclk: |
1328 | clk_put(mcbsp->iclk); | |
1329 | err_iclk: | |
b4b58f58 | 1330 | iounmap(mcbsp->io_base); |
d592dd1a | 1331 | err_ioremap: |
b820ce4e | 1332 | kfree(mcbsp); |
bc5d0c89 EV |
1333 | exit: |
1334 | return ret; | |
1335 | } | |
120db2cb | 1336 | |
25cef225 | 1337 | static int __devexit omap_mcbsp_remove(struct platform_device *pdev) |
5e1c5ff4 | 1338 | { |
bc5d0c89 | 1339 | struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev); |
5e1c5ff4 | 1340 | |
bc5d0c89 EV |
1341 | platform_set_drvdata(pdev, NULL); |
1342 | if (mcbsp) { | |
5e1c5ff4 | 1343 | |
bc5d0c89 EV |
1344 | if (mcbsp->pdata && mcbsp->pdata->ops && |
1345 | mcbsp->pdata->ops->free) | |
1346 | mcbsp->pdata->ops->free(mcbsp->id); | |
5e1c5ff4 | 1347 | |
a1a56f5f EV |
1348 | omap34xx_device_exit(mcbsp); |
1349 | ||
b820ce4e RK |
1350 | clk_disable(mcbsp->fclk); |
1351 | clk_disable(mcbsp->iclk); | |
1352 | clk_put(mcbsp->fclk); | |
1353 | clk_put(mcbsp->iclk); | |
bc5d0c89 | 1354 | |
d592dd1a RK |
1355 | iounmap(mcbsp->io_base); |
1356 | ||
b820ce4e RK |
1357 | mcbsp->fclk = NULL; |
1358 | mcbsp->iclk = NULL; | |
bc5d0c89 EV |
1359 | mcbsp->free = 0; |
1360 | mcbsp->dev = NULL; | |
5e1c5ff4 TL |
1361 | } |
1362 | ||
1363 | return 0; | |
1364 | } | |
1365 | ||
bc5d0c89 EV |
1366 | static struct platform_driver omap_mcbsp_driver = { |
1367 | .probe = omap_mcbsp_probe, | |
25cef225 | 1368 | .remove = __devexit_p(omap_mcbsp_remove), |
bc5d0c89 EV |
1369 | .driver = { |
1370 | .name = "omap-mcbsp", | |
1371 | }, | |
1372 | }; | |
1373 | ||
1374 | int __init omap_mcbsp_init(void) | |
1375 | { | |
1376 | /* Register the McBSP driver */ | |
1377 | return platform_driver_register(&omap_mcbsp_driver); | |
1378 | } |