blob: 4b15cd7926d7e974a61111d141943ea22b7e697c [file] [log] [blame]
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001/*
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>
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +030018#include <linux/platform_device.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010019#include <linux/interrupt.h>
20#include <linux/err.h>
Russell Kingf8ce2542006-01-07 16:15:52 +000021#include <linux/clk.h>
Tony Lindgren04fbf6a2007-02-12 10:50:53 -080022#include <linux/delay.h>
Eduardo Valentinfb78d802008-07-03 12:24:39 +030023#include <linux/io.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010025
Tony Lindgrence491cf2009-10-20 09:40:47 -070026#include <plat/mcbsp.h>
Kishon Vijay Abraham Ie95496d2011-02-24 15:16:54 +053027#include <linux/pm_runtime.h>
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010028
Chandra Shekharb4b58f52008-10-08 10:01:39 +030029struct omap_mcbsp **mcbsp_ptr;
Jarkko Nikulaac6747ca2011-09-26 10:45:43 +030030int omap_mcbsp_count;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +030031
Jarkko Nikula09d28d22011-09-26 10:45:48 +030032#define omap_mcbsp_check_valid_id(id) (id < omap_mcbsp_count)
33#define id_to_mcbsp_ptr(id) mcbsp_ptr[id];
34
Manjunath Kondaiah Gb0a330d2010-10-08 10:00:19 -070035static void omap_mcbsp_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
Chandra Shekharb4b58f52008-10-08 10:01:39 +030036{
Jarkko Nikulacdc715142011-09-26 10:45:39 +030037 void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
38
39 if (mcbsp->pdata->reg_size == 2) {
40 ((u16 *)mcbsp->reg_cache)[reg] = (u16)val;
41 __raw_writew((u16)val, addr);
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -080042 } else {
Jarkko Nikulacdc715142011-09-26 10:45:39 +030043 ((u32 *)mcbsp->reg_cache)[reg] = val;
44 __raw_writel(val, addr);
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -080045 }
Chandra Shekharb4b58f52008-10-08 10:01:39 +030046}
47
Manjunath Kondaiah Gb0a330d2010-10-08 10:00:19 -070048static int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg, bool from_cache)
Chandra Shekharb4b58f52008-10-08 10:01:39 +030049{
Jarkko Nikulacdc715142011-09-26 10:45:39 +030050 void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
51
52 if (mcbsp->pdata->reg_size == 2) {
53 return !from_cache ? __raw_readw(addr) :
54 ((u16 *)mcbsp->reg_cache)[reg];
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -080055 } else {
Jarkko Nikulacdc715142011-09-26 10:45:39 +030056 return !from_cache ? __raw_readl(addr) :
57 ((u32 *)mcbsp->reg_cache)[reg];
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -080058 }
Chandra Shekharb4b58f52008-10-08 10:01:39 +030059}
60
Manjunath Kondaiah Gb0a330d2010-10-08 10:00:19 -070061static void omap_mcbsp_st_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
Eero Nurkkalad912fa92010-02-22 12:21:11 +000062{
63 __raw_writel(val, mcbsp->st_data->io_base_st + reg);
64}
65
Manjunath Kondaiah Gb0a330d2010-10-08 10:00:19 -070066static int omap_mcbsp_st_read(struct omap_mcbsp *mcbsp, u16 reg)
Eero Nurkkalad912fa92010-02-22 12:21:11 +000067{
68 return __raw_readl(mcbsp->st_data->io_base_st + reg);
69}
Eero Nurkkalad912fa92010-02-22 12:21:11 +000070
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080071#define MCBSP_READ(mcbsp, reg) \
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -080072 omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 0)
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080073#define MCBSP_WRITE(mcbsp, reg, val) \
74 omap_mcbsp_write(mcbsp, OMAP_MCBSP_REG_##reg, val)
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -080075#define MCBSP_READ_CACHE(mcbsp, reg) \
76 omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 1)
Chandra Shekharb4b58f52008-10-08 10:01:39 +030077
Eero Nurkkalad912fa92010-02-22 12:21:11 +000078#define MCBSP_ST_READ(mcbsp, reg) \
79 omap_mcbsp_st_read(mcbsp, OMAP_ST_REG_##reg)
80#define MCBSP_ST_WRITE(mcbsp, reg, val) \
81 omap_mcbsp_st_write(mcbsp, OMAP_ST_REG_##reg, val)
82
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +010083static void omap_mcbsp_dump_reg(u8 id)
84{
Chandra Shekharb4b58f52008-10-08 10:01:39 +030085 struct omap_mcbsp *mcbsp = id_to_mcbsp_ptr(id);
86
87 dev_dbg(mcbsp->dev, "**** McBSP%d regs ****\n", mcbsp->id);
88 dev_dbg(mcbsp->dev, "DRR2: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080089 MCBSP_READ(mcbsp, DRR2));
Chandra Shekharb4b58f52008-10-08 10:01:39 +030090 dev_dbg(mcbsp->dev, "DRR1: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080091 MCBSP_READ(mcbsp, DRR1));
Chandra Shekharb4b58f52008-10-08 10:01:39 +030092 dev_dbg(mcbsp->dev, "DXR2: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080093 MCBSP_READ(mcbsp, DXR2));
Chandra Shekharb4b58f52008-10-08 10:01:39 +030094 dev_dbg(mcbsp->dev, "DXR1: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080095 MCBSP_READ(mcbsp, DXR1));
Chandra Shekharb4b58f52008-10-08 10:01:39 +030096 dev_dbg(mcbsp->dev, "SPCR2: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080097 MCBSP_READ(mcbsp, SPCR2));
Chandra Shekharb4b58f52008-10-08 10:01:39 +030098 dev_dbg(mcbsp->dev, "SPCR1: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -080099 MCBSP_READ(mcbsp, SPCR1));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300100 dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800101 MCBSP_READ(mcbsp, RCR2));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300102 dev_dbg(mcbsp->dev, "RCR1: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800103 MCBSP_READ(mcbsp, RCR1));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300104 dev_dbg(mcbsp->dev, "XCR2: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800105 MCBSP_READ(mcbsp, XCR2));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300106 dev_dbg(mcbsp->dev, "XCR1: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800107 MCBSP_READ(mcbsp, XCR1));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300108 dev_dbg(mcbsp->dev, "SRGR2: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800109 MCBSP_READ(mcbsp, SRGR2));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300110 dev_dbg(mcbsp->dev, "SRGR1: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800111 MCBSP_READ(mcbsp, SRGR1));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300112 dev_dbg(mcbsp->dev, "PCR0: 0x%04x\n",
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800113 MCBSP_READ(mcbsp, PCR0));
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300114 dev_dbg(mcbsp->dev, "***********************\n");
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100115}
116
Linus Torvalds0cd61b62006-10-06 10:53:39 -0700117static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100118{
Jeff Garzike8f2af12007-10-26 05:40:25 -0400119 struct omap_mcbsp *mcbsp_tx = dev_id;
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700120 u16 irqst_spcr2;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100121
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800122 irqst_spcr2 = MCBSP_READ(mcbsp_tx, SPCR2);
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700123 dev_dbg(mcbsp_tx->dev, "TX IRQ callback : 0x%x\n", irqst_spcr2);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100124
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700125 if (irqst_spcr2 & XSYNC_ERR) {
126 dev_err(mcbsp_tx->dev, "TX Frame Sync Error! : 0x%x\n",
127 irqst_spcr2);
128 /* Writing zero to XSYNC_ERR clears the IRQ */
Janusz Krzysztofik0841cb82010-02-23 15:50:38 +0000129 MCBSP_WRITE(mcbsp_tx, SPCR2, MCBSP_READ_CACHE(mcbsp_tx, SPCR2));
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700130 }
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300131
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100132 return IRQ_HANDLED;
133}
134
Linus Torvalds0cd61b62006-10-06 10:53:39 -0700135static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100136{
Jeff Garzike8f2af12007-10-26 05:40:25 -0400137 struct omap_mcbsp *mcbsp_rx = dev_id;
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700138 u16 irqst_spcr1;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100139
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800140 irqst_spcr1 = MCBSP_READ(mcbsp_rx, SPCR1);
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700141 dev_dbg(mcbsp_rx->dev, "RX IRQ callback : 0x%x\n", irqst_spcr1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100142
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700143 if (irqst_spcr1 & RSYNC_ERR) {
144 dev_err(mcbsp_rx->dev, "RX Frame Sync Error! : 0x%x\n",
145 irqst_spcr1);
146 /* Writing zero to RSYNC_ERR clears the IRQ */
Janusz Krzysztofik0841cb82010-02-23 15:50:38 +0000147 MCBSP_WRITE(mcbsp_rx, SPCR1, MCBSP_READ_CACHE(mcbsp_rx, SPCR1));
Eero Nurkkalad6d834b2009-05-25 11:08:42 -0700148 }
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300149
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100150 return IRQ_HANDLED;
151}
152
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100153/*
154 * omap_mcbsp_config simply write a config to the
155 * appropriate McBSP.
156 * You either call this function or set the McBSP registers
157 * by yourself before calling omap_mcbsp_start().
158 */
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300159void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100160{
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300161 struct omap_mcbsp *mcbsp;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100162
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300163 if (!omap_mcbsp_check_valid_id(id)) {
164 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
165 return;
166 }
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300167 mcbsp = id_to_mcbsp_ptr(id);
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300168
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300169 dev_dbg(mcbsp->dev, "Configuring McBSP%d phys_base: 0x%08lx\n",
170 mcbsp->id, mcbsp->phys_base);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100171
172 /* We write the given config */
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800173 MCBSP_WRITE(mcbsp, SPCR2, config->spcr2);
174 MCBSP_WRITE(mcbsp, SPCR1, config->spcr1);
175 MCBSP_WRITE(mcbsp, RCR2, config->rcr2);
176 MCBSP_WRITE(mcbsp, RCR1, config->rcr1);
177 MCBSP_WRITE(mcbsp, XCR2, config->xcr2);
178 MCBSP_WRITE(mcbsp, XCR1, config->xcr1);
179 MCBSP_WRITE(mcbsp, SRGR2, config->srgr2);
180 MCBSP_WRITE(mcbsp, SRGR1, config->srgr1);
181 MCBSP_WRITE(mcbsp, MCR2, config->mcr2);
182 MCBSP_WRITE(mcbsp, MCR1, config->mcr1);
183 MCBSP_WRITE(mcbsp, PCR0, config->pcr0);
Jarkko Nikula88408232011-09-26 10:45:41 +0300184 if (mcbsp->pdata->has_ccr) {
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800185 MCBSP_WRITE(mcbsp, XCCR, config->xccr);
186 MCBSP_WRITE(mcbsp, RCCR, config->rccr);
Tony Lindgren3127f8f2009-01-15 13:09:54 +0200187 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100188}
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300189EXPORT_SYMBOL(omap_mcbsp_config);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100190
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530191/**
192 * omap_mcbsp_dma_params - returns the dma channel number
193 * @id - mcbsp id
194 * @stream - indicates the direction of data flow (rx or tx)
195 *
196 * Returns the dma channel number for the rx channel or tx channel
197 * based on the value of @stream for the requested mcbsp given by @id
198 */
199int omap_mcbsp_dma_ch_params(unsigned int id, unsigned int stream)
200{
201 struct omap_mcbsp *mcbsp;
202
203 if (!omap_mcbsp_check_valid_id(id)) {
204 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
205 return -ENODEV;
206 }
207 mcbsp = id_to_mcbsp_ptr(id);
208
209 if (stream)
210 return mcbsp->dma_rx_sync;
211 else
212 return mcbsp->dma_tx_sync;
213}
214EXPORT_SYMBOL(omap_mcbsp_dma_ch_params);
215
216/**
217 * omap_mcbsp_dma_reg_params - returns the address of mcbsp data register
218 * @id - mcbsp id
219 * @stream - indicates the direction of data flow (rx or tx)
220 *
221 * Returns the address of mcbsp data transmit register or data receive register
222 * to be used by DMA for transferring/receiving data based on the value of
223 * @stream for the requested mcbsp given by @id
224 */
225int omap_mcbsp_dma_reg_params(unsigned int id, unsigned int stream)
226{
227 struct omap_mcbsp *mcbsp;
228 int data_reg;
229
230 if (!omap_mcbsp_check_valid_id(id)) {
231 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
232 return -ENODEV;
233 }
234 mcbsp = id_to_mcbsp_ptr(id);
235
Jarkko Nikulacdc715142011-09-26 10:45:39 +0300236 if (mcbsp->pdata->reg_size == 2) {
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530237 if (stream)
Jarkko Nikulacdc715142011-09-26 10:45:39 +0300238 data_reg = OMAP_MCBSP_REG_DRR1;
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530239 else
Jarkko Nikulacdc715142011-09-26 10:45:39 +0300240 data_reg = OMAP_MCBSP_REG_DXR1;
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530241 } else {
242 if (stream)
Jarkko Nikulacdc715142011-09-26 10:45:39 +0300243 data_reg = OMAP_MCBSP_REG_DRR;
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530244 else
Jarkko Nikulacdc715142011-09-26 10:45:39 +0300245 data_reg = OMAP_MCBSP_REG_DXR;
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530246 }
247
Jarkko Nikulacdc715142011-09-26 10:45:39 +0300248 return mcbsp->phys_dma_base + data_reg * mcbsp->pdata->reg_step;
Kishon Vijay Abraham I9504ba62011-02-24 15:16:55 +0530249}
250EXPORT_SYMBOL(omap_mcbsp_dma_reg_params);
251
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000252static void omap_st_on(struct omap_mcbsp *mcbsp)
253{
254 unsigned int w;
255
Jarkko Nikula1743d142011-09-26 10:45:44 +0300256 if (mcbsp->pdata->enable_st_clock)
257 mcbsp->pdata->enable_st_clock(mcbsp->id, 1);
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000258
259 /* Enable McBSP Sidetone */
260 w = MCBSP_READ(mcbsp, SSELCR);
261 MCBSP_WRITE(mcbsp, SSELCR, w | SIDETONEEN);
262
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000263 /* Enable Sidetone from Sidetone Core */
264 w = MCBSP_ST_READ(mcbsp, SSELCR);
265 MCBSP_ST_WRITE(mcbsp, SSELCR, w | ST_SIDETONEEN);
266}
267
268static void omap_st_off(struct omap_mcbsp *mcbsp)
269{
270 unsigned int w;
271
272 w = MCBSP_ST_READ(mcbsp, SSELCR);
273 MCBSP_ST_WRITE(mcbsp, SSELCR, w & ~(ST_SIDETONEEN));
274
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000275 w = MCBSP_READ(mcbsp, SSELCR);
276 MCBSP_WRITE(mcbsp, SSELCR, w & ~(SIDETONEEN));
277
Jarkko Nikula1743d142011-09-26 10:45:44 +0300278 if (mcbsp->pdata->enable_st_clock)
279 mcbsp->pdata->enable_st_clock(mcbsp->id, 0);
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000280}
281
282static void omap_st_fir_write(struct omap_mcbsp *mcbsp, s16 *fir)
283{
284 u16 val, i;
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000285
286 val = MCBSP_ST_READ(mcbsp, SSELCR);
287
288 if (val & ST_COEFFWREN)
289 MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
290
291 MCBSP_ST_WRITE(mcbsp, SSELCR, val | ST_COEFFWREN);
292
293 for (i = 0; i < 128; i++)
294 MCBSP_ST_WRITE(mcbsp, SFIRCR, fir[i]);
295
296 i = 0;
297
298 val = MCBSP_ST_READ(mcbsp, SSELCR);
299 while (!(val & ST_COEFFWRDONE) && (++i < 1000))
300 val = MCBSP_ST_READ(mcbsp, SSELCR);
301
302 MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
303
304 if (i == 1000)
305 dev_err(mcbsp->dev, "McBSP FIR load error!\n");
306}
307
308static void omap_st_chgain(struct omap_mcbsp *mcbsp)
309{
310 u16 w;
311 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000312
313 w = MCBSP_ST_READ(mcbsp, SSELCR);
314
315 MCBSP_ST_WRITE(mcbsp, SGAINCR, ST_CH0GAIN(st_data->ch0gain) | \
316 ST_CH1GAIN(st_data->ch1gain));
317}
318
319int omap_st_set_chgain(unsigned int id, int channel, s16 chgain)
320{
321 struct omap_mcbsp *mcbsp;
322 struct omap_mcbsp_st_data *st_data;
323 int ret = 0;
324
325 if (!omap_mcbsp_check_valid_id(id)) {
326 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
327 return -ENODEV;
328 }
329
330 mcbsp = id_to_mcbsp_ptr(id);
331 st_data = mcbsp->st_data;
332
333 if (!st_data)
334 return -ENOENT;
335
336 spin_lock_irq(&mcbsp->lock);
337 if (channel == 0)
338 st_data->ch0gain = chgain;
339 else if (channel == 1)
340 st_data->ch1gain = chgain;
341 else
342 ret = -EINVAL;
343
344 if (st_data->enabled)
345 omap_st_chgain(mcbsp);
346 spin_unlock_irq(&mcbsp->lock);
347
348 return ret;
349}
350EXPORT_SYMBOL(omap_st_set_chgain);
351
352int omap_st_get_chgain(unsigned int id, int channel, s16 *chgain)
353{
354 struct omap_mcbsp *mcbsp;
355 struct omap_mcbsp_st_data *st_data;
356 int ret = 0;
357
358 if (!omap_mcbsp_check_valid_id(id)) {
359 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
360 return -ENODEV;
361 }
362
363 mcbsp = id_to_mcbsp_ptr(id);
364 st_data = mcbsp->st_data;
365
366 if (!st_data)
367 return -ENOENT;
368
369 spin_lock_irq(&mcbsp->lock);
370 if (channel == 0)
371 *chgain = st_data->ch0gain;
372 else if (channel == 1)
373 *chgain = st_data->ch1gain;
374 else
375 ret = -EINVAL;
376 spin_unlock_irq(&mcbsp->lock);
377
378 return ret;
379}
380EXPORT_SYMBOL(omap_st_get_chgain);
381
382static int omap_st_start(struct omap_mcbsp *mcbsp)
383{
384 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
385
386 if (st_data && st_data->enabled && !st_data->running) {
387 omap_st_fir_write(mcbsp, st_data->taps);
388 omap_st_chgain(mcbsp);
389
390 if (!mcbsp->free) {
391 omap_st_on(mcbsp);
392 st_data->running = 1;
393 }
394 }
395
396 return 0;
397}
398
399int omap_st_enable(unsigned int id)
400{
401 struct omap_mcbsp *mcbsp;
402 struct omap_mcbsp_st_data *st_data;
403
404 if (!omap_mcbsp_check_valid_id(id)) {
405 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
406 return -ENODEV;
407 }
408
409 mcbsp = id_to_mcbsp_ptr(id);
410 st_data = mcbsp->st_data;
411
412 if (!st_data)
413 return -ENODEV;
414
415 spin_lock_irq(&mcbsp->lock);
416 st_data->enabled = 1;
417 omap_st_start(mcbsp);
418 spin_unlock_irq(&mcbsp->lock);
419
420 return 0;
421}
422EXPORT_SYMBOL(omap_st_enable);
423
424static int omap_st_stop(struct omap_mcbsp *mcbsp)
425{
426 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
427
428 if (st_data && st_data->running) {
429 if (!mcbsp->free) {
430 omap_st_off(mcbsp);
431 st_data->running = 0;
432 }
433 }
434
435 return 0;
436}
437
438int omap_st_disable(unsigned int id)
439{
440 struct omap_mcbsp *mcbsp;
441 struct omap_mcbsp_st_data *st_data;
442 int ret = 0;
443
444 if (!omap_mcbsp_check_valid_id(id)) {
445 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
446 return -ENODEV;
447 }
448
449 mcbsp = id_to_mcbsp_ptr(id);
450 st_data = mcbsp->st_data;
451
452 if (!st_data)
453 return -ENODEV;
454
455 spin_lock_irq(&mcbsp->lock);
456 omap_st_stop(mcbsp);
457 st_data->enabled = 0;
458 spin_unlock_irq(&mcbsp->lock);
459
460 return ret;
461}
462EXPORT_SYMBOL(omap_st_disable);
463
464int omap_st_is_enabled(unsigned int id)
465{
466 struct omap_mcbsp *mcbsp;
467 struct omap_mcbsp_st_data *st_data;
468
469 if (!omap_mcbsp_check_valid_id(id)) {
470 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
471 return -ENODEV;
472 }
473
474 mcbsp = id_to_mcbsp_ptr(id);
475 st_data = mcbsp->st_data;
476
477 if (!st_data)
478 return -ENODEV;
479
480
481 return st_data->enabled;
482}
483EXPORT_SYMBOL(omap_st_is_enabled);
484
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300485/*
Peter Ujfalusi451fd822010-06-03 07:39:33 +0300486 * omap_mcbsp_set_rx_threshold configures the transmit threshold in words.
487 * The threshold parameter is 1 based, and it is converted (threshold - 1)
488 * for the THRSH2 register.
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300489 */
490void omap_mcbsp_set_tx_threshold(unsigned int id, u16 threshold)
491{
492 struct omap_mcbsp *mcbsp;
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300493
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300494 if (!omap_mcbsp_check_valid_id(id)) {
495 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
496 return;
497 }
498 mcbsp = id_to_mcbsp_ptr(id);
Jarkko Nikula7bba67a2011-09-26 10:45:42 +0300499 if (mcbsp->pdata->buffer_size == 0)
500 return;
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300501
Peter Ujfalusi451fd822010-06-03 07:39:33 +0300502 if (threshold && threshold <= mcbsp->max_tx_thres)
503 MCBSP_WRITE(mcbsp, THRSH2, threshold - 1);
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300504}
505EXPORT_SYMBOL(omap_mcbsp_set_tx_threshold);
506
507/*
Peter Ujfalusi451fd822010-06-03 07:39:33 +0300508 * omap_mcbsp_set_rx_threshold configures the receive threshold in words.
509 * The threshold parameter is 1 based, and it is converted (threshold - 1)
510 * for the THRSH1 register.
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300511 */
512void omap_mcbsp_set_rx_threshold(unsigned int id, u16 threshold)
513{
514 struct omap_mcbsp *mcbsp;
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300515
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300516 if (!omap_mcbsp_check_valid_id(id)) {
517 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
518 return;
519 }
520 mcbsp = id_to_mcbsp_ptr(id);
Jarkko Nikula7bba67a2011-09-26 10:45:42 +0300521 if (mcbsp->pdata->buffer_size == 0)
522 return;
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300523
Peter Ujfalusi451fd822010-06-03 07:39:33 +0300524 if (threshold && threshold <= mcbsp->max_rx_thres)
525 MCBSP_WRITE(mcbsp, THRSH1, threshold - 1);
Eduardo Valentin7aa9ff52009-08-20 16:18:10 +0300526}
527EXPORT_SYMBOL(omap_mcbsp_set_rx_threshold);
Eduardo Valentina1a56f5f2009-08-20 16:18:11 +0300528
529/*
530 * omap_mcbsp_get_max_tx_thres just return the current configured
531 * maximum threshold for transmission
532 */
533u16 omap_mcbsp_get_max_tx_threshold(unsigned int id)
534{
535 struct omap_mcbsp *mcbsp;
536
537 if (!omap_mcbsp_check_valid_id(id)) {
538 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
539 return -ENODEV;
540 }
541 mcbsp = id_to_mcbsp_ptr(id);
542
543 return mcbsp->max_tx_thres;
544}
545EXPORT_SYMBOL(omap_mcbsp_get_max_tx_threshold);
546
547/*
548 * omap_mcbsp_get_max_rx_thres just return the current configured
549 * maximum threshold for reception
550 */
551u16 omap_mcbsp_get_max_rx_threshold(unsigned int id)
552{
553 struct omap_mcbsp *mcbsp;
554
555 if (!omap_mcbsp_check_valid_id(id)) {
556 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
557 return -ENODEV;
558 }
559 mcbsp = id_to_mcbsp_ptr(id);
560
561 return mcbsp->max_rx_thres;
562}
563EXPORT_SYMBOL(omap_mcbsp_get_max_rx_threshold);
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +0300564
Peter Ujfalusi0acce822010-06-03 07:39:32 +0300565u16 omap_mcbsp_get_fifo_size(unsigned int id)
566{
567 struct omap_mcbsp *mcbsp;
568
569 if (!omap_mcbsp_check_valid_id(id)) {
570 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
571 return -ENODEV;
572 }
573 mcbsp = id_to_mcbsp_ptr(id);
574
575 return mcbsp->pdata->buffer_size;
576}
577EXPORT_SYMBOL(omap_mcbsp_get_fifo_size);
578
Peter Ujfalusi7dc976e2010-03-03 15:08:08 +0200579/*
580 * omap_mcbsp_get_tx_delay returns the number of used slots in the McBSP FIFO
581 */
582u16 omap_mcbsp_get_tx_delay(unsigned int id)
583{
584 struct omap_mcbsp *mcbsp;
585 u16 buffstat;
586
587 if (!omap_mcbsp_check_valid_id(id)) {
588 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
589 return -ENODEV;
590 }
591 mcbsp = id_to_mcbsp_ptr(id);
Jarkko Nikula7bba67a2011-09-26 10:45:42 +0300592 if (mcbsp->pdata->buffer_size == 0)
593 return 0;
Peter Ujfalusi7dc976e2010-03-03 15:08:08 +0200594
595 /* Returns the number of free locations in the buffer */
596 buffstat = MCBSP_READ(mcbsp, XBUFFSTAT);
597
598 /* Number of slots are different in McBSP ports */
Peter Ujfalusif10b8ad2010-06-03 07:39:34 +0300599 return mcbsp->pdata->buffer_size - buffstat;
Peter Ujfalusi7dc976e2010-03-03 15:08:08 +0200600}
601EXPORT_SYMBOL(omap_mcbsp_get_tx_delay);
602
603/*
604 * omap_mcbsp_get_rx_delay returns the number of free slots in the McBSP FIFO
605 * to reach the threshold value (when the DMA will be triggered to read it)
606 */
607u16 omap_mcbsp_get_rx_delay(unsigned int id)
608{
609 struct omap_mcbsp *mcbsp;
610 u16 buffstat, threshold;
611
612 if (!omap_mcbsp_check_valid_id(id)) {
613 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
614 return -ENODEV;
615 }
616 mcbsp = id_to_mcbsp_ptr(id);
Jarkko Nikula7bba67a2011-09-26 10:45:42 +0300617 if (mcbsp->pdata->buffer_size == 0)
618 return 0;
Peter Ujfalusi7dc976e2010-03-03 15:08:08 +0200619
620 /* Returns the number of used locations in the buffer */
621 buffstat = MCBSP_READ(mcbsp, RBUFFSTAT);
622 /* RX threshold */
623 threshold = MCBSP_READ(mcbsp, THRSH1);
624
625 /* Return the number of location till we reach the threshold limit */
626 if (threshold <= buffstat)
627 return 0;
628 else
629 return threshold - buffstat;
630}
631EXPORT_SYMBOL(omap_mcbsp_get_rx_delay);
632
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +0300633/*
634 * omap_mcbsp_get_dma_op_mode just return the current configured
635 * operating mode for the mcbsp channel
636 */
637int omap_mcbsp_get_dma_op_mode(unsigned int id)
638{
639 struct omap_mcbsp *mcbsp;
640 int dma_op_mode;
641
642 if (!omap_mcbsp_check_valid_id(id)) {
643 printk(KERN_ERR "%s: Invalid id (%u)\n", __func__, id + 1);
644 return -ENODEV;
645 }
646 mcbsp = id_to_mcbsp_ptr(id);
647
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +0300648 dma_op_mode = mcbsp->dma_op_mode;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +0300649
650 return dma_op_mode;
651}
652EXPORT_SYMBOL(omap_mcbsp_get_dma_op_mode);
Eero Nurkkala2122fdc2009-08-20 16:18:15 +0300653
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100654int omap_mcbsp_request(unsigned int id)
655{
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300656 struct omap_mcbsp *mcbsp;
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800657 void *reg_cache;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100658 int err;
659
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300660 if (!omap_mcbsp_check_valid_id(id)) {
661 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
662 return -ENODEV;
Tony Lindgren120db2c2006-04-02 17:46:27 +0100663 }
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300664 mcbsp = id_to_mcbsp_ptr(id);
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300665
Jarkko Nikulaac6747ca2011-09-26 10:45:43 +0300666 reg_cache = kzalloc(mcbsp->reg_cache_size, GFP_KERNEL);
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800667 if (!reg_cache) {
668 return -ENOMEM;
669 }
670
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300671 spin_lock(&mcbsp->lock);
672 if (!mcbsp->free) {
673 dev_err(mcbsp->dev, "McBSP%d is currently in use\n",
674 mcbsp->id);
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800675 err = -EBUSY;
676 goto err_kfree;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100677 }
678
Shubhrajyoti D6722a722010-12-07 16:25:41 -0800679 mcbsp->free = false;
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800680 mcbsp->reg_cache = reg_cache;
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300681 spin_unlock(&mcbsp->lock);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100682
Russell Kingb820ce42009-01-23 10:26:46 +0000683 if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request)
684 mcbsp->pdata->ops->request(id);
685
Kishon Vijay Abraham Ie95496d2011-02-24 15:16:54 +0530686 pm_runtime_get_sync(mcbsp->dev);
Russell Kingb820ce42009-01-23 10:26:46 +0000687
Jarkko Nikula1a645882011-09-26 10:45:40 +0300688 /* Enable wakeup behavior */
689 if (mcbsp->pdata->has_wakeup)
690 MCBSP_WRITE(mcbsp, WAKEUPEN, XRDYEN | RRDYEN);
Eero Nurkkala2122fdc2009-08-20 16:18:15 +0300691
Jarkko Nikula5a070552008-10-08 10:01:41 +0300692 /*
693 * Make sure that transmitter, receiver and sample-rate generator are
694 * not running before activating IRQs.
695 */
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800696 MCBSP_WRITE(mcbsp, SPCR1, 0);
697 MCBSP_WRITE(mcbsp, SPCR2, 0);
Jarkko Nikula5a070552008-10-08 10:01:41 +0300698
Jarkko Nikulabafe2722011-06-14 11:23:52 +0000699 err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler,
700 0, "McBSP", (void *)mcbsp);
701 if (err != 0) {
702 dev_err(mcbsp->dev, "Unable to request TX IRQ %d "
703 "for McBSP%d\n", mcbsp->tx_irq,
704 mcbsp->id);
705 goto err_clk_disable;
706 }
Tony Lindgren120db2c2006-04-02 17:46:27 +0100707
Jarkko Nikulabafe2722011-06-14 11:23:52 +0000708 if (mcbsp->rx_irq) {
709 err = request_irq(mcbsp->rx_irq,
710 omap_mcbsp_rx_irq_handler,
711 0, "McBSP", (void *)mcbsp);
712 if (err != 0) {
713 dev_err(mcbsp->dev, "Unable to request RX IRQ %d "
714 "for McBSP%d\n", mcbsp->rx_irq,
715 mcbsp->id);
716 goto err_free_irq;
Tony Lindgren120db2c2006-04-02 17:46:27 +0100717 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100718 }
719
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100720 return 0;
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800721err_free_irq:
Janusz Krzysztofik1866b542010-01-08 10:29:04 -0800722 free_irq(mcbsp->tx_irq, (void *)mcbsp);
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800723err_clk_disable:
Janusz Krzysztofik1866b542010-01-08 10:29:04 -0800724 if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free)
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800725 mcbsp->pdata->ops->free(id);
Janusz Krzysztofik1866b542010-01-08 10:29:04 -0800726
Jarkko Nikula1a645882011-09-26 10:45:40 +0300727 /* Disable wakeup behavior */
728 if (mcbsp->pdata->has_wakeup)
729 MCBSP_WRITE(mcbsp, WAKEUPEN, 0);
Janusz Krzysztofik1866b542010-01-08 10:29:04 -0800730
Kishon Vijay Abraham Ie95496d2011-02-24 15:16:54 +0530731 pm_runtime_put_sync(mcbsp->dev);
Janusz Krzysztofik1866b542010-01-08 10:29:04 -0800732
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800733 spin_lock(&mcbsp->lock);
Shubhrajyoti D6722a722010-12-07 16:25:41 -0800734 mcbsp->free = true;
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800735 mcbsp->reg_cache = NULL;
736err_kfree:
737 spin_unlock(&mcbsp->lock);
738 kfree(reg_cache);
Janusz Krzysztofik1866b542010-01-08 10:29:04 -0800739
740 return err;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100741}
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300742EXPORT_SYMBOL(omap_mcbsp_request);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100743
744void omap_mcbsp_free(unsigned int id)
745{
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300746 struct omap_mcbsp *mcbsp;
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800747 void *reg_cache;
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300748
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300749 if (!omap_mcbsp_check_valid_id(id)) {
750 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100751 return;
Tony Lindgren120db2c2006-04-02 17:46:27 +0100752 }
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300753 mcbsp = id_to_mcbsp_ptr(id);
Tony Lindgren120db2c2006-04-02 17:46:27 +0100754
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300755 if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free)
756 mcbsp->pdata->ops->free(id);
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300757
Jarkko Nikula1a645882011-09-26 10:45:40 +0300758 /* Disable wakeup behavior */
759 if (mcbsp->pdata->has_wakeup)
760 MCBSP_WRITE(mcbsp, WAKEUPEN, 0);
Eero Nurkkala2122fdc2009-08-20 16:18:15 +0300761
Kishon Vijay Abraham Ie95496d2011-02-24 15:16:54 +0530762 pm_runtime_put_sync(mcbsp->dev);
Russell Kingb820ce42009-01-23 10:26:46 +0000763
Jarkko Nikulabafe2722011-06-14 11:23:52 +0000764 if (mcbsp->rx_irq)
765 free_irq(mcbsp->rx_irq, (void *)mcbsp);
766 free_irq(mcbsp->tx_irq, (void *)mcbsp);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100767
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800768 reg_cache = mcbsp->reg_cache;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100769
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800770 spin_lock(&mcbsp->lock);
771 if (mcbsp->free)
772 dev_err(mcbsp->dev, "McBSP%d was not reserved\n", mcbsp->id);
773 else
Shubhrajyoti D6722a722010-12-07 16:25:41 -0800774 mcbsp->free = true;
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800775 mcbsp->reg_cache = NULL;
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300776 spin_unlock(&mcbsp->lock);
Janusz Krzysztofikc8c99692010-02-15 10:03:33 -0800777
778 if (reg_cache)
779 kfree(reg_cache);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100780}
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300781EXPORT_SYMBOL(omap_mcbsp_free);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100782
783/*
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300784 * Here we start the McBSP, by enabling transmitter, receiver or both.
785 * If no transmitter or receiver is active prior calling, then sample-rate
786 * generator and frame sync are started.
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100787 */
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300788void omap_mcbsp_start(unsigned int id, int tx, int rx)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100789{
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300790 struct omap_mcbsp *mcbsp;
Peter Ujfalusice3f0542010-08-31 08:11:44 +0000791 int enable_srg = 0;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100792 u16 w;
793
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300794 if (!omap_mcbsp_check_valid_id(id)) {
795 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100796 return;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300797 }
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300798 mcbsp = id_to_mcbsp_ptr(id);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100799
Jarkko Nikulaf821eec2011-09-26 10:45:45 +0300800 if (mcbsp->st_data)
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000801 omap_st_start(mcbsp);
802
Peter Ujfalusice3f0542010-08-31 08:11:44 +0000803 /* Only enable SRG, if McBSP is master */
804 w = MCBSP_READ_CACHE(mcbsp, PCR0);
805 if (w & (FSXM | FSRM | CLKXM | CLKRM))
806 enable_srg = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
807 MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300808
Peter Ujfalusice3f0542010-08-31 08:11:44 +0000809 if (enable_srg) {
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300810 /* Start the sample generator */
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800811 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800812 MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 6));
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300813 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100814
815 /* Enable transmitter and receiver */
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300816 tx &= 1;
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800817 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800818 MCBSP_WRITE(mcbsp, SPCR2, w | tx);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100819
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300820 rx &= 1;
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800821 w = MCBSP_READ_CACHE(mcbsp, SPCR1);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800822 MCBSP_WRITE(mcbsp, SPCR1, w | rx);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100823
Eduardo Valentin44a63112009-08-20 16:18:09 +0300824 /*
825 * Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec
826 * REVISIT: 100us may give enough time for two CLKSRG, however
827 * due to some unknown PM related, clock gating etc. reason it
828 * is now at 500us.
829 */
830 udelay(500);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100831
Peter Ujfalusice3f0542010-08-31 08:11:44 +0000832 if (enable_srg) {
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300833 /* Start frame sync */
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800834 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800835 MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 7));
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300836 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100837
Jarkko Nikula88408232011-09-26 10:45:41 +0300838 if (mcbsp->pdata->has_ccr) {
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300839 /* Release the transmitter and receiver */
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800840 w = MCBSP_READ_CACHE(mcbsp, XCCR);
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300841 w &= ~(tx ? XDISABLE : 0);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800842 MCBSP_WRITE(mcbsp, XCCR, w);
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800843 w = MCBSP_READ_CACHE(mcbsp, RCCR);
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300844 w &= ~(rx ? RDISABLE : 0);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800845 MCBSP_WRITE(mcbsp, RCCR, w);
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300846 }
847
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100848 /* Dump McBSP Regs */
849 omap_mcbsp_dump_reg(id);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100850}
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300851EXPORT_SYMBOL(omap_mcbsp_start);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100852
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300853void omap_mcbsp_stop(unsigned int id, int tx, int rx)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100854{
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300855 struct omap_mcbsp *mcbsp;
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300856 int idle;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100857 u16 w;
858
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300859 if (!omap_mcbsp_check_valid_id(id)) {
860 printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100861 return;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +0300862 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100863
Chandra Shekharb4b58f52008-10-08 10:01:39 +0300864 mcbsp = id_to_mcbsp_ptr(id);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100865
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300866 /* Reset transmitter */
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300867 tx &= 1;
Jarkko Nikula88408232011-09-26 10:45:41 +0300868 if (mcbsp->pdata->has_ccr) {
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800869 w = MCBSP_READ_CACHE(mcbsp, XCCR);
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300870 w |= (tx ? XDISABLE : 0);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800871 MCBSP_WRITE(mcbsp, XCCR, w);
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300872 }
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800873 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800874 MCBSP_WRITE(mcbsp, SPCR2, w & ~tx);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100875
876 /* Reset receiver */
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300877 rx &= 1;
Jarkko Nikula88408232011-09-26 10:45:41 +0300878 if (mcbsp->pdata->has_ccr) {
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800879 w = MCBSP_READ_CACHE(mcbsp, RCCR);
Jarkko Nikulaa93d4ed2009-10-14 09:56:35 -0700880 w |= (rx ? RDISABLE : 0);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800881 MCBSP_WRITE(mcbsp, RCCR, w);
Jarkko Nikulad09a2af2009-08-23 12:24:27 +0300882 }
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800883 w = MCBSP_READ_CACHE(mcbsp, SPCR1);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800884 MCBSP_WRITE(mcbsp, SPCR1, w & ~rx);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100885
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800886 idle = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
887 MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300888
889 if (idle) {
890 /* Reset the sample rate generator */
Janusz Krzysztofik96fbd742010-02-15 10:03:33 -0800891 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
Janusz Krzysztofik8ea32002010-02-15 10:03:32 -0800892 MCBSP_WRITE(mcbsp, SPCR2, w & ~(1 << 6));
Jarkko Nikulac12abc02009-08-07 09:59:47 +0300893 }
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000894
Jarkko Nikulaf821eec2011-09-26 10:45:45 +0300895 if (mcbsp->st_data)
Eero Nurkkalad912fa92010-02-22 12:21:11 +0000896 omap_st_stop(mcbsp);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100897}
Eduardo Valentinfb78d802008-07-03 12:24:39 +0300898EXPORT_SYMBOL(omap_mcbsp_stop);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +0100899
Paul Walmsley69d042d2011-07-01 08:52:25 +0000900int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
901{
Jarkko Nikula09d28d22011-09-26 10:45:48 +0300902 struct omap_mcbsp *mcbsp;
903 const char *src;
Paul Walmsley69d042d2011-07-01 08:52:25 +0000904
Jarkko Nikula09d28d22011-09-26 10:45:48 +0300905 if (!omap_mcbsp_check_valid_id(id)) {
906 pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
907 return -EINVAL;
908 }
909 mcbsp = id_to_mcbsp_ptr(id);
910
911 if (fck_src_id == MCBSP_CLKS_PAD_SRC)
912 src = "clks_ext";
913 else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
914 src = "clks_fclk";
915 else
916 return -EINVAL;
917
918 if (mcbsp->pdata->set_clk_src)
919 return mcbsp->pdata->set_clk_src(mcbsp->dev, mcbsp->fclk, src);
920 else
921 return -EINVAL;
922}
923EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
924
Paul Walmsley69d042d2011-07-01 08:52:25 +0000925void omap2_mcbsp1_mux_clkr_src(u8 mux)
926{
Jarkko Nikula7bc0c4b2011-09-26 10:45:49 +0300927 struct omap_mcbsp *mcbsp;
928 const char *src;
929
930 if (mux == CLKR_SRC_CLKR)
931 src = "clkr";
932 else if (mux == CLKR_SRC_CLKX)
933 src = "clkx";
934 else
935 return;
936
937 mcbsp = id_to_mcbsp_ptr(0);
938 if (mcbsp->pdata->mux_signal)
939 mcbsp->pdata->mux_signal(mcbsp->dev, "clkr", src);
Paul Walmsley69d042d2011-07-01 08:52:25 +0000940}
Jarkko Nikula7bc0c4b2011-09-26 10:45:49 +0300941EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
Paul Walmsley69d042d2011-07-01 08:52:25 +0000942
943void omap2_mcbsp1_mux_fsr_src(u8 mux)
944{
Jarkko Nikula7bc0c4b2011-09-26 10:45:49 +0300945 struct omap_mcbsp *mcbsp;
946 const char *src;
947
948 if (mux == FSR_SRC_FSR)
949 src = "fsr";
950 else if (mux == FSR_SRC_FSX)
951 src = "fsx";
952 else
953 return;
954
955 mcbsp = id_to_mcbsp_ptr(0);
956 if (mcbsp->pdata->mux_signal)
957 mcbsp->pdata->mux_signal(mcbsp->dev, "fsr", src);
Paul Walmsley69d042d2011-07-01 08:52:25 +0000958}
Jarkko Nikula7bc0c4b2011-09-26 10:45:49 +0300959EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
Paul Walmsley69d042d2011-07-01 08:52:25 +0000960
Eduardo Valentina1a56f5f2009-08-20 16:18:11 +0300961#define max_thres(m) (mcbsp->pdata->buffer_size)
962#define valid_threshold(m, val) ((val) <= max_thres(m))
963#define THRESHOLD_PROP_BUILDER(prop) \
964static ssize_t prop##_show(struct device *dev, \
965 struct device_attribute *attr, char *buf) \
966{ \
967 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \
968 \
969 return sprintf(buf, "%u\n", mcbsp->prop); \
970} \
971 \
972static ssize_t prop##_store(struct device *dev, \
973 struct device_attribute *attr, \
974 const char *buf, size_t size) \
975{ \
976 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \
977 unsigned long val; \
978 int status; \
979 \
980 status = strict_strtoul(buf, 0, &val); \
981 if (status) \
982 return status; \
983 \
984 if (!valid_threshold(mcbsp, val)) \
985 return -EDOM; \
986 \
987 mcbsp->prop = val; \
988 return size; \
989} \
990 \
991static DEVICE_ATTR(prop, 0644, prop##_show, prop##_store);
992
993THRESHOLD_PROP_BUILDER(max_tx_thres);
994THRESHOLD_PROP_BUILDER(max_rx_thres);
995
Jarkko Nikula9b300502009-08-24 17:45:50 +0300996static const char *dma_op_modes[] = {
997 "element", "threshold", "frame",
998};
999
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001000static ssize_t dma_op_mode_show(struct device *dev,
1001 struct device_attribute *attr, char *buf)
1002{
1003 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
Jarkko Nikula9b300502009-08-24 17:45:50 +03001004 int dma_op_mode, i = 0;
1005 ssize_t len = 0;
1006 const char * const *s;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001007
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001008 dma_op_mode = mcbsp->dma_op_mode;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001009
Jarkko Nikula9b300502009-08-24 17:45:50 +03001010 for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) {
1011 if (dma_op_mode == i)
1012 len += sprintf(buf + len, "[%s] ", *s);
1013 else
1014 len += sprintf(buf + len, "%s ", *s);
1015 }
1016 len += sprintf(buf + len, "\n");
1017
1018 return len;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001019}
1020
1021static ssize_t dma_op_mode_store(struct device *dev,
1022 struct device_attribute *attr,
1023 const char *buf, size_t size)
1024{
1025 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
Jarkko Nikula9b300502009-08-24 17:45:50 +03001026 const char * const *s;
1027 int i = 0;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001028
Jarkko Nikula9b300502009-08-24 17:45:50 +03001029 for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++)
1030 if (sysfs_streq(buf, *s))
1031 break;
1032
1033 if (i == ARRAY_SIZE(dma_op_modes))
1034 return -EINVAL;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001035
1036 spin_lock_irq(&mcbsp->lock);
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001037 if (!mcbsp->free) {
1038 size = -EBUSY;
1039 goto unlock;
1040 }
Jarkko Nikula9b300502009-08-24 17:45:50 +03001041 mcbsp->dma_op_mode = i;
Peter Ujfalusi98cb20e2009-08-20 16:18:14 +03001042
1043unlock:
1044 spin_unlock_irq(&mcbsp->lock);
1045
1046 return size;
1047}
1048
1049static DEVICE_ATTR(dma_op_mode, 0644, dma_op_mode_show, dma_op_mode_store);
1050
Jarkko Nikula7bba67a2011-09-26 10:45:42 +03001051static const struct attribute *additional_attrs[] = {
1052 &dev_attr_max_tx_thres.attr,
1053 &dev_attr_max_rx_thres.attr,
1054 &dev_attr_dma_op_mode.attr,
1055 NULL,
1056};
1057
1058static const struct attribute_group additional_attr_group = {
1059 .attrs = (struct attribute **)additional_attrs,
1060};
1061
Eero Nurkkalad912fa92010-02-22 12:21:11 +00001062static ssize_t st_taps_show(struct device *dev,
1063 struct device_attribute *attr, char *buf)
1064{
1065 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
1066 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
1067 ssize_t status = 0;
1068 int i;
1069
1070 spin_lock_irq(&mcbsp->lock);
1071 for (i = 0; i < st_data->nr_taps; i++)
1072 status += sprintf(&buf[status], (i ? ", %d" : "%d"),
1073 st_data->taps[i]);
1074 if (i)
1075 status += sprintf(&buf[status], "\n");
1076 spin_unlock_irq(&mcbsp->lock);
1077
1078 return status;
1079}
1080
1081static ssize_t st_taps_store(struct device *dev,
1082 struct device_attribute *attr,
1083 const char *buf, size_t size)
1084{
1085 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
1086 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
1087 int val, tmp, status, i = 0;
1088
1089 spin_lock_irq(&mcbsp->lock);
1090 memset(st_data->taps, 0, sizeof(st_data->taps));
1091 st_data->nr_taps = 0;
1092
1093 do {
1094 status = sscanf(buf, "%d%n", &val, &tmp);
1095 if (status < 0 || status == 0) {
1096 size = -EINVAL;
1097 goto out;
1098 }
1099 if (val < -32768 || val > 32767) {
1100 size = -EINVAL;
1101 goto out;
1102 }
1103 st_data->taps[i++] = val;
1104 buf += tmp;
1105 if (*buf != ',')
1106 break;
1107 buf++;
1108 } while (1);
1109
1110 st_data->nr_taps = i;
1111
1112out:
1113 spin_unlock_irq(&mcbsp->lock);
1114
1115 return size;
1116}
1117
1118static DEVICE_ATTR(st_taps, 0644, st_taps_show, st_taps_store);
1119
Eero Nurkkalad912fa92010-02-22 12:21:11 +00001120static const struct attribute *sidetone_attrs[] = {
1121 &dev_attr_st_taps.attr,
1122 NULL,
1123};
1124
1125static const struct attribute_group sidetone_attr_group = {
1126 .attrs = (struct attribute **)sidetone_attrs,
1127};
1128
Jarkko Nikulaf821eec2011-09-26 10:45:45 +03001129static int __devinit omap_st_add(struct omap_mcbsp *mcbsp,
1130 struct resource *res)
Eero Nurkkalad912fa92010-02-22 12:21:11 +00001131{
Eero Nurkkalad912fa92010-02-22 12:21:11 +00001132 struct omap_mcbsp_st_data *st_data;
1133 int err;
1134
1135 st_data = kzalloc(sizeof(*mcbsp->st_data), GFP_KERNEL);
1136 if (!st_data) {
1137 err = -ENOMEM;
1138 goto err1;
1139 }
1140
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001141 st_data->io_base_st = ioremap(res->start, resource_size(res));
Eero Nurkkalad912fa92010-02-22 12:21:11 +00001142 if (!st_data->io_base_st) {
1143 err = -ENOMEM;
1144 goto err2;
1145 }
1146
1147 err = sysfs_create_group(&mcbsp->dev->kobj, &sidetone_attr_group);
1148 if (err)
1149 goto err3;
1150
1151 mcbsp->st_data = st_data;
1152 return 0;
1153
1154err3:
1155 iounmap(st_data->io_base_st);
1156err2:
1157 kfree(st_data);
1158err1:
1159 return err;
1160
1161}
1162
1163static void __devexit omap_st_remove(struct omap_mcbsp *mcbsp)
1164{
1165 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
1166
Jarkko Nikulaf821eec2011-09-26 10:45:45 +03001167 sysfs_remove_group(&mcbsp->dev->kobj, &sidetone_attr_group);
1168 iounmap(st_data->io_base_st);
1169 kfree(st_data);
Eero Nurkkalad912fa92010-02-22 12:21:11 +00001170}
1171
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001172/*
1173 * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
1174 * 730 has only 2 McBSP, and both of them are MPU peripherals.
1175 */
Uwe Kleine-König25cef222008-10-08 10:01:39 +03001176static int __devinit omap_mcbsp_probe(struct platform_device *pdev)
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001177{
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001178 struct omap_mcbsp_platform_data *pdata = pdev->dev.platform_data;
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001179 struct omap_mcbsp *mcbsp;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001180 int id = pdev->id - 1;
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001181 struct resource *res;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001182 int ret = 0;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001183
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001184 if (!pdata) {
1185 dev_err(&pdev->dev, "McBSP device initialized without"
1186 "platform data\n");
1187 ret = -EINVAL;
1188 goto exit;
1189 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001190
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001191 dev_dbg(&pdev->dev, "Initializing OMAP McBSP (%d).\n", pdev->id);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001192
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001193 if (id >= omap_mcbsp_count) {
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001194 dev_err(&pdev->dev, "Invalid McBSP device id (%d)\n", id);
1195 ret = -EINVAL;
1196 goto exit;
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001197 }
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001198
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001199 mcbsp = kzalloc(sizeof(struct omap_mcbsp), GFP_KERNEL);
1200 if (!mcbsp) {
1201 ret = -ENOMEM;
1202 goto exit;
1203 }
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001204
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001205 spin_lock_init(&mcbsp->lock);
1206 mcbsp->id = id + 1;
Shubhrajyoti D6722a722010-12-07 16:25:41 -08001207 mcbsp->free = true;
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001208
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001209 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
1210 if (!res) {
1211 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1212 if (!res) {
1213 dev_err(&pdev->dev, "%s:mcbsp%d has invalid memory"
1214 "resource\n", __func__, pdev->id);
1215 ret = -ENOMEM;
1216 goto exit;
1217 }
1218 }
1219 mcbsp->phys_base = res->start;
Jarkko Nikulaac6747ca2011-09-26 10:45:43 +03001220 mcbsp->reg_cache_size = resource_size(res);
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001221 mcbsp->io_base = ioremap(res->start, resource_size(res));
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001222 if (!mcbsp->io_base) {
Russell Kingd592dd12008-09-04 14:25:42 +01001223 ret = -ENOMEM;
1224 goto err_ioremap;
1225 }
1226
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001227 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
1228 if (!res)
1229 mcbsp->phys_dma_base = mcbsp->phys_base;
1230 else
1231 mcbsp->phys_dma_base = res->start;
1232
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001233 mcbsp->tx_irq = platform_get_irq_byname(pdev, "tx");
1234 mcbsp->rx_irq = platform_get_irq_byname(pdev, "rx");
1235
Kishon Vijay Abraham Icb7e9de2011-02-24 15:16:50 +05301236 /* From OMAP4 there will be a single irq line */
1237 if (mcbsp->tx_irq == -ENXIO)
1238 mcbsp->tx_irq = platform_get_irq(pdev, 0);
1239
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001240 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
1241 if (!res) {
1242 dev_err(&pdev->dev, "%s:mcbsp%d has invalid rx DMA channel\n",
1243 __func__, pdev->id);
1244 ret = -ENODEV;
1245 goto err_res;
1246 }
1247 mcbsp->dma_rx_sync = res->start;
1248
1249 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
1250 if (!res) {
1251 dev_err(&pdev->dev, "%s:mcbsp%d has invalid tx DMA channel\n",
1252 __func__, pdev->id);
1253 ret = -ENODEV;
1254 goto err_res;
1255 }
1256 mcbsp->dma_tx_sync = res->start;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001257
Russell Kingb820ce42009-01-23 10:26:46 +00001258 mcbsp->fclk = clk_get(&pdev->dev, "fck");
1259 if (IS_ERR(mcbsp->fclk)) {
1260 ret = PTR_ERR(mcbsp->fclk);
1261 dev_err(&pdev->dev, "unable to get fck: %d\n", ret);
Kishon Vijay Abraham Ie95496d2011-02-24 15:16:54 +05301262 goto err_res;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001263 }
1264
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001265 mcbsp->pdata = pdata;
1266 mcbsp->dev = &pdev->dev;
Russell Kingb820ce42009-01-23 10:26:46 +00001267 mcbsp_ptr[id] = mcbsp;
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001268 platform_set_drvdata(pdev, mcbsp);
Kishon Vijay Abraham Ie95496d2011-02-24 15:16:54 +05301269 pm_runtime_enable(mcbsp->dev);
Eduardo Valentina1a56f5f2009-08-20 16:18:11 +03001270
Jarkko Nikula7bba67a2011-09-26 10:45:42 +03001271 mcbsp->dma_op_mode = MCBSP_DMA_MODE_ELEMENT;
1272 if (mcbsp->pdata->buffer_size) {
1273 /*
1274 * Initially configure the maximum thresholds to a safe value.
1275 * The McBSP FIFO usage with these values should not go under
1276 * 16 locations.
1277 * If the whole FIFO without safety buffer is used, than there
1278 * is a possibility that the DMA will be not able to push the
1279 * new data on time, causing channel shifts in runtime.
1280 */
1281 mcbsp->max_tx_thres = max_thres(mcbsp) - 0x10;
1282 mcbsp->max_rx_thres = max_thres(mcbsp) - 0x10;
1283
1284 ret = sysfs_create_group(&mcbsp->dev->kobj,
1285 &additional_attr_group);
1286 if (ret) {
1287 dev_err(mcbsp->dev,
1288 "Unable to create additional controls\n");
1289 goto err_thres;
1290 }
1291 } else {
1292 mcbsp->max_tx_thres = -EINVAL;
1293 mcbsp->max_rx_thres = -EINVAL;
1294 }
1295
Jarkko Nikulaf821eec2011-09-26 10:45:45 +03001296 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sidetone");
1297 if (res) {
1298 ret = omap_st_add(mcbsp, res);
1299 if (ret) {
1300 dev_err(mcbsp->dev,
1301 "Unable to create sidetone controls\n");
1302 goto err_st;
1303 }
1304 }
Eduardo Valentina1a56f5f2009-08-20 16:18:11 +03001305
Russell Kingd592dd12008-09-04 14:25:42 +01001306 return 0;
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001307
Jarkko Nikulaf821eec2011-09-26 10:45:45 +03001308err_st:
1309 if (mcbsp->pdata->buffer_size)
1310 sysfs_remove_group(&mcbsp->dev->kobj,
1311 &additional_attr_group);
Jarkko Nikula7bba67a2011-09-26 10:45:42 +03001312err_thres:
1313 clk_put(mcbsp->fclk);
Kishon Vijay Abraham I3cf32bb2011-02-24 12:51:45 -08001314err_res:
Chandra Shekharb4b58f52008-10-08 10:01:39 +03001315 iounmap(mcbsp->io_base);
Russell Kingd592dd12008-09-04 14:25:42 +01001316err_ioremap:
Russell Kingb820ce42009-01-23 10:26:46 +00001317 kfree(mcbsp);
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001318exit:
1319 return ret;
1320}
1321
Uwe Kleine-König25cef222008-10-08 10:01:39 +03001322static int __devexit omap_mcbsp_remove(struct platform_device *pdev)
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001323{
1324 struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
1325
1326 platform_set_drvdata(pdev, NULL);
1327 if (mcbsp) {
1328
1329 if (mcbsp->pdata && mcbsp->pdata->ops &&
1330 mcbsp->pdata->ops->free)
1331 mcbsp->pdata->ops->free(mcbsp->id);
1332
Jarkko Nikula7bba67a2011-09-26 10:45:42 +03001333 if (mcbsp->pdata->buffer_size)
1334 sysfs_remove_group(&mcbsp->dev->kobj,
1335 &additional_attr_group);
1336
Jarkko Nikulaf821eec2011-09-26 10:45:45 +03001337 if (mcbsp->st_data)
1338 omap_st_remove(mcbsp);
Eduardo Valentina1a56f5f2009-08-20 16:18:11 +03001339
Russell Kingb820ce42009-01-23 10:26:46 +00001340 clk_put(mcbsp->fclk);
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001341
Russell Kingd592dd12008-09-04 14:25:42 +01001342 iounmap(mcbsp->io_base);
Jarkko Nikula5f3b7282010-12-07 16:25:40 -08001343 kfree(mcbsp);
Tony Lindgren5e1c5ff2005-07-10 19:58:15 +01001344 }
1345
1346 return 0;
1347}
1348
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001349static struct platform_driver omap_mcbsp_driver = {
1350 .probe = omap_mcbsp_probe,
Uwe Kleine-König25cef222008-10-08 10:01:39 +03001351 .remove = __devexit_p(omap_mcbsp_remove),
Eduardo Valentinbc5d0c82008-07-03 12:24:39 +03001352 .driver = {
1353 .name = "omap-mcbsp",
1354 },
1355};
1356
1357int __init omap_mcbsp_init(void)
1358{
1359 /* Register the McBSP driver */
1360 return platform_driver_register(&omap_mcbsp_driver);
1361}