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Message-Id: <1345816913-4113-2-git-send-email-lee.jones@linaro.org>
Date: Fri, 24 Aug 2012 15:01:37 +0100
From: Lee Jones <lee.jones@...aro.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: STEricsson_nomadik_linux@...t.st.com, linus.walleij@...ricsson.com,
arnd@...db.de, broonie@...nsource.wolfsonmicro.com,
ola.o.lilja@...ricsson.com, roger.xr.nilsson@...ricsson.com,
alsa-devel@...a-project.org, Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 01/17] ASoC: Ux500: Move MSP pinctrl setup into the MSP driver
In the initial submission of the MSP driver msp1 and msp3's associated
pinctrl mechanism was passed back to platform code using a plat_init()
call-back routine, but it has no place in platform code. The MSP driver
should set this up for the appropriate ports. Instead we use a use_pinctrl
identifier which is passed from platform_data/Device Tree which indicates
which ports should use pinctrl.
CC: alsa-devel@...a-project.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
arch/arm/mach-ux500/board-mop500-msp.c | 75 +-------------------------------
arch/arm/mach-ux500/include/mach/msp.h | 2 -
sound/soc/ux500/ux500_msp_i2s.c | 67 +++++++++++++++++++++-------
sound/soc/ux500/ux500_msp_i2s.h | 8 +++-
4 files changed, 58 insertions(+), 94 deletions(-)
diff --git a/arch/arm/mach-ux500/board-mop500-msp.c b/arch/arm/mach-ux500/board-mop500-msp.c
index df15646..fc78d5d 100644
--- a/arch/arm/mach-ux500/board-mop500-msp.c
+++ b/arch/arm/mach-ux500/board-mop500-msp.c
@@ -23,53 +23,6 @@
#include "devices-db8500.h"
#include "pins-db8500.h"
-/* MSP1/3 Tx/Rx usage protection */
-static DEFINE_SPINLOCK(msp_rxtx_lock);
-
-/* Reference Count */
-static int msp_rxtx_ref;
-
-/* Pin modes */
-struct pinctrl *msp1_p;
-struct pinctrl_state *msp1_def;
-struct pinctrl_state *msp1_sleep;
-
-int msp13_i2s_init(void)
-{
- int retval = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&msp_rxtx_lock, flags);
- if (msp_rxtx_ref == 0 && !(IS_ERR(msp1_p) || IS_ERR(msp1_def))) {
- retval = pinctrl_select_state(msp1_p, msp1_def);
- if (retval)
- pr_err("could not set MSP1 defstate\n");
- }
- if (!retval)
- msp_rxtx_ref++;
- spin_unlock_irqrestore(&msp_rxtx_lock, flags);
-
- return retval;
-}
-
-int msp13_i2s_exit(void)
-{
- int retval = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&msp_rxtx_lock, flags);
- WARN_ON(!msp_rxtx_ref);
- msp_rxtx_ref--;
- if (msp_rxtx_ref == 0 && !(IS_ERR(msp1_p) || IS_ERR(msp1_sleep))) {
- retval = pinctrl_select_state(msp1_p, msp1_sleep);
- if (retval)
- pr_err("could not set MSP1 sleepstate\n");
- }
- spin_unlock_irqrestore(&msp_rxtx_lock, flags);
-
- return retval;
-}
-
static struct stedma40_chan_cfg msp0_dma_rx = {
.high_priority = true,
.dir = STEDMA40_PERIPH_TO_MEM,
@@ -132,8 +85,6 @@ static struct msp_i2s_platform_data msp1_platform_data = {
.id = MSP_I2S_1,
.msp_i2s_dma_rx = NULL,
.msp_i2s_dma_tx = &msp1_dma_tx,
- .msp_i2s_init = msp13_i2s_init,
- .msp_i2s_exit = msp13_i2s_exit,
};
static struct stedma40_chan_cfg msp2_dma_rx = {
@@ -219,47 +170,23 @@ static struct msp_i2s_platform_data msp3_platform_data = {
.id = MSP_I2S_3,
.msp_i2s_dma_rx = &msp1_dma_rx,
.msp_i2s_dma_tx = NULL,
- .msp_i2s_init = msp13_i2s_init,
- .msp_i2s_exit = msp13_i2s_exit,
};
int mop500_msp_init(struct device *parent)
{
- struct platform_device *msp1;
-
pr_info("%s: Register platform-device 'snd-soc-mop500'.\n", __func__);
platform_device_register(&snd_soc_mop500);
pr_info("Initialize MSP I2S-devices.\n");
db8500_add_msp_i2s(parent, 0, U8500_MSP0_BASE, IRQ_DB8500_MSP0,
&msp0_platform_data);
- msp1 = db8500_add_msp_i2s(parent, 1, U8500_MSP1_BASE, IRQ_DB8500_MSP1,
+ db8500_add_msp_i2s(parent, 1, U8500_MSP1_BASE, IRQ_DB8500_MSP1,
&msp1_platform_data);
db8500_add_msp_i2s(parent, 2, U8500_MSP2_BASE, IRQ_DB8500_MSP2,
&msp2_platform_data);
db8500_add_msp_i2s(parent, 3, U8500_MSP3_BASE, IRQ_DB8500_MSP1,
&msp3_platform_data);
- /* Get the pinctrl handle for MSP1 */
- if (msp1) {
- msp1_p = pinctrl_get(&msp1->dev);
- if (IS_ERR(msp1_p))
- dev_err(&msp1->dev, "could not get MSP1 pinctrl\n");
- else {
- msp1_def = pinctrl_lookup_state(msp1_p,
- PINCTRL_STATE_DEFAULT);
- if (IS_ERR(msp1_def)) {
- dev_err(&msp1->dev,
- "could not get MSP1 defstate\n");
- }
- msp1_sleep = pinctrl_lookup_state(msp1_p,
- PINCTRL_STATE_SLEEP);
- if (IS_ERR(msp1_sleep))
- dev_err(&msp1->dev,
- "could not get MSP1 idlestate\n");
- }
- }
-
pr_info("%s: Register platform-device 'ux500-pcm'\n", __func__);
platform_device_register(&ux500_pcm);
diff --git a/arch/arm/mach-ux500/include/mach/msp.h b/arch/arm/mach-ux500/include/mach/msp.h
index 798be19..3cc7142 100644
--- a/arch/arm/mach-ux500/include/mach/msp.h
+++ b/arch/arm/mach-ux500/include/mach/msp.h
@@ -22,8 +22,6 @@ struct msp_i2s_platform_data {
enum msp_i2s_id id;
struct stedma40_chan_cfg *msp_i2s_dma_rx;
struct stedma40_chan_cfg *msp_i2s_dma_tx;
- int (*msp_i2s_init) (void);
- int (*msp_i2s_exit) (void);
};
#endif
diff --git a/sound/soc/ux500/ux500_msp_i2s.c b/sound/soc/ux500/ux500_msp_i2s.c
index 36be11e..08813c5 100644
--- a/sound/soc/ux500/ux500_msp_i2s.c
+++ b/sound/soc/ux500/ux500_msp_i2s.c
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
#include <linux/delay.h>
#include <linux/slab.h>
@@ -25,6 +26,9 @@
#include "ux500_msp_i2s.h"
+/* MSP1/3 Tx/Rx usage protection */
+static DEFINE_SPINLOCK(msp_rxtx_lock);
+
/* Protocol desciptors */
static const struct msp_protdesc prot_descs[] = {
{ /* I2S */
@@ -352,17 +356,23 @@ static int configure_multichannel(struct ux500_msp *msp,
static int enable_msp(struct ux500_msp *msp, struct ux500_msp_config *config)
{
- int status = 0;
+ int status = 0, retval = 0;
u32 reg_val_DMACR, reg_val_GCR;
+ unsigned long flags;
/* Check msp state whether in RUN or CONFIGURED Mode */
- if ((msp->msp_state == MSP_STATE_IDLE) && (msp->plat_init)) {
- status = msp->plat_init();
- if (status) {
- dev_err(msp->dev, "%s: ERROR: Failed to init MSP (%d)!\n",
- __func__, status);
- return status;
+ if (msp->msp_state == MSP_STATE_IDLE) {
+ spin_lock_irqsave(&msp_rxtx_lock, flags);
+ if (msp->pinctrl_rxtx_ref == 0 &&
+ !(IS_ERR(msp->pinctrl_p) || IS_ERR(msp->pinctrl_def))) {
+ retval = pinctrl_select_state(msp->pinctrl_p,
+ msp->pinctrl_def);
+ if (retval)
+ pr_err("could not set MSP defstate\n");
}
+ if (!retval)
+ msp->pinctrl_rxtx_ref++;
+ spin_unlock_irqrestore(&msp_rxtx_lock, flags);
}
/* Configure msp with protocol dependent settings */
@@ -620,7 +630,8 @@ int ux500_msp_i2s_trigger(struct ux500_msp *msp, int cmd, int direction)
int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir)
{
- int status = 0;
+ int status = 0, retval = 0;
+ unsigned long flags;
dev_dbg(msp->dev, "%s: Enter (dir = 0x%01x).\n", __func__, dir);
@@ -631,12 +642,19 @@ int ux500_msp_i2s_close(struct ux500_msp *msp, unsigned int dir)
writel((readl(msp->registers + MSP_GCR) &
(~(FRAME_GEN_ENABLE | SRG_ENABLE))),
msp->registers + MSP_GCR);
- if (msp->plat_exit)
- status = msp->plat_exit();
- if (status)
- dev_warn(msp->dev,
- "%s: WARN: ux500_msp_i2s_exit failed (%d)!\n",
- __func__, status);
+
+ spin_lock_irqsave(&msp_rxtx_lock, flags);
+ WARN_ON(!msp->pinctrl_rxtx_ref);
+ msp->pinctrl_rxtx_ref--;
+ if (msp->pinctrl_rxtx_ref == 0 &&
+ !(IS_ERR(msp->pinctrl_p) || IS_ERR(msp->pinctrl_sleep))) {
+ retval = pinctrl_select_state(msp->pinctrl_p,
+ msp->pinctrl_sleep);
+ if (retval)
+ pr_err("could not set MSP sleepstate\n");
+ }
+ spin_unlock_irqrestore(&msp_rxtx_lock, flags);
+
writel(0, msp->registers + MSP_GCR);
writel(0, msp->registers + MSP_TCF);
writel(0, msp->registers + MSP_RCF);
@@ -678,8 +696,6 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
msp->id = platform_data->id;
msp->dev = &pdev->dev;
- msp->plat_init = platform_data->msp_i2s_init;
- msp->plat_exit = platform_data->msp_i2s_exit;
msp->dma_cfg_rx = platform_data->msp_i2s_dma_rx;
msp->dma_cfg_tx = platform_data->msp_i2s_dma_tx;
@@ -717,6 +733,25 @@ int ux500_msp_i2s_init_msp(struct platform_device *pdev,
dev_dbg(&pdev->dev, "I2S device-name: '%s'\n", i2s_cont->name);
msp->i2s_cont = i2s_cont;
+ msp->pinctrl_p = pinctrl_get(msp->dev);
+ if (IS_ERR(msp->pinctrl_p))
+ dev_err(&pdev->dev, "could not get MSP pinctrl\n");
+ else {
+ msp->pinctrl_def = pinctrl_lookup_state(msp->pinctrl_p,
+ PINCTRL_STATE_DEFAULT);
+ if (IS_ERR(msp->pinctrl_def)) {
+ dev_err(&pdev->dev,
+ "could not get MSP defstate (%li)\n",
+ PTR_ERR(msp->pinctrl_def));
+ }
+ msp->pinctrl_sleep = pinctrl_lookup_state(msp->pinctrl_p,
+ PINCTRL_STATE_SLEEP);
+ if (IS_ERR(msp->pinctrl_sleep))
+ dev_err(&pdev->dev,
+ "could not get MSP idlestate (%li)\n",
+ PTR_ERR(msp->pinctrl_def));
+ }
+
return 0;
err_i2s_cont:
diff --git a/sound/soc/ux500/ux500_msp_i2s.h b/sound/soc/ux500/ux500_msp_i2s.h
index 2d9136d..1311c0d 100644
--- a/sound/soc/ux500/ux500_msp_i2s.h
+++ b/sound/soc/ux500/ux500_msp_i2s.h
@@ -524,14 +524,18 @@ struct ux500_msp {
struct dma_chan *rx_pipeid;
enum msp_state msp_state;
int (*transfer) (struct ux500_msp *msp, struct i2s_message *message);
- int (*plat_init) (void);
- int (*plat_exit) (void);
struct timer_list notify_timer;
int def_elem_len;
unsigned int dir_busy;
int loopback_enable;
u32 backup_regs[MAX_MSP_BACKUP_REGS];
unsigned int f_bitclk;
+ /* Pin modes */
+ struct pinctrl *pinctrl_p;
+ struct pinctrl_state *pinctrl_def;
+ struct pinctrl_state *pinctrl_sleep;
+ /* Reference Count */
+ int pinctrl_rxtx_ref;
};
struct ux500_msp_dma_params {
--
1.7.9.5
--
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