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linux/sound/soc/tegra/tegra30_ahub.c
Dylan Reid 591d14f007 ASoC: tegra: Use flat regcache 
When using an rbtree cache, there can be allocations the first time a
register is accessed.  This can cause an attempt to schedule while
atomic in the case that the regmap is using a spinlock.  This could be
fixed by either initializing all the registers or using a flat cache.
The register maps for tegra30_ahub and tegra30_i2s are dense and don't
save much from using a tree so convert them to flat.

Tegra30 changes tested on Norrin, Tegra20 changes compile.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-19 23:09:45 +00:00

802 lines
21 KiB
C
Raw Blame History

/*
* tegra30_ahub.c - Tegra30 AHUB driver
*
* Copyright (c) 2011,2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include "tegra30_ahub.h"
#define DRV_NAME "tegra30-ahub"
static struct tegra30_ahub *ahub;
static inline void tegra30_apbif_write(u32 reg, u32 val)
{
regmap_write(ahub->regmap_apbif, reg, val);
}
static inline u32 tegra30_apbif_read(u32 reg)
{
u32 val;
regmap_read(ahub->regmap_apbif, reg, &val);
return val;
}
static inline void tegra30_audio_write(u32 reg, u32 val)
{
regmap_write(ahub->regmap_ahub, reg, val);
}
static int tegra30_ahub_runtime_suspend(struct device *dev)
{
regcache_cache_only(ahub->regmap_apbif, true);
regcache_cache_only(ahub->regmap_ahub, true);
clk_disable_unprepare(ahub->clk_apbif);
clk_disable_unprepare(ahub->clk_d_audio);
return 0;
}
/*
* clk_apbif isn't required for an I2S<->I2S configuration where no PCM data
* is read from or sent to memory. However, that's not something the rest of
* the driver supports right now, so we'll just treat the two clocks as one
* for now.
*
* These functions should not be a plain ref-count. Instead, each active stream
* contributes some requirement to the minimum clock rate, so starting or
* stopping streams should dynamically adjust the clock as required. However,
* this is not yet implemented.
*/
static int tegra30_ahub_runtime_resume(struct device *dev)
{
int ret;
ret = clk_prepare_enable(ahub->clk_d_audio);
if (ret) {
dev_err(dev, "clk_enable d_audio failed: %d\n", ret);
return ret;
}
ret = clk_prepare_enable(ahub->clk_apbif);
if (ret) {
dev_err(dev, "clk_enable apbif failed: %d\n", ret);
clk_disable(ahub->clk_d_audio);
return ret;
}
regcache_cache_only(ahub->regmap_apbif, false);
regcache_cache_only(ahub->regmap_ahub, false);
return 0;
}
int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
char *dmachan, int dmachan_len,
dma_addr_t *fiforeg)
{
int channel;
u32 reg, val;
struct tegra30_ahub_cif_conf cif_conf;
channel = find_first_zero_bit(ahub->rx_usage,
TEGRA30_AHUB_CHANNEL_CTRL_COUNT);
if (channel >= TEGRA30_AHUB_CHANNEL_CTRL_COUNT)
return -EBUSY;
__set_bit(channel, ahub->rx_usage);
*rxcif = TEGRA30_AHUB_RXCIF_APBIF_RX0 + channel;
snprintf(dmachan, dmachan_len, "rx%d", channel);
*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
(channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
val = tegra30_apbif_read(reg);
val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
tegra30_apbif_write(reg, val);
cif_conf.threshold = 0;
cif_conf.audio_channels = 2;
cif_conf.client_channels = 2;
cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
cif_conf.expand = 0;
cif_conf.stereo_conv = 0;
cif_conf.replicate = 0;
cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
cif_conf.truncate = 0;
cif_conf.mono_conv = 0;
reg = TEGRA30_AHUB_CIF_RX_CTRL +
(channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_rx_fifo);
int tegra30_ahub_enable_rx_fifo(enum tegra30_ahub_rxcif rxcif)
{
int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
int reg, val;
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
val = tegra30_apbif_read(reg);
val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_EN;
tegra30_apbif_write(reg, val);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_enable_rx_fifo);
int tegra30_ahub_disable_rx_fifo(enum tegra30_ahub_rxcif rxcif)
{
int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
int reg, val;
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
val = tegra30_apbif_read(reg);
val &= ~TEGRA30_AHUB_CHANNEL_CTRL_RX_EN;
tegra30_apbif_write(reg, val);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_disable_rx_fifo);
int tegra30_ahub_free_rx_fifo(enum tegra30_ahub_rxcif rxcif)
{
int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
__clear_bit(channel, ahub->rx_usage);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_free_rx_fifo);
int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
char *dmachan, int dmachan_len,
dma_addr_t *fiforeg)
{
int channel;
u32 reg, val;
struct tegra30_ahub_cif_conf cif_conf;
channel = find_first_zero_bit(ahub->tx_usage,
TEGRA30_AHUB_CHANNEL_CTRL_COUNT);
if (channel >= TEGRA30_AHUB_CHANNEL_CTRL_COUNT)
return -EBUSY;
__set_bit(channel, ahub->tx_usage);
*txcif = TEGRA30_AHUB_TXCIF_APBIF_TX0 + channel;
snprintf(dmachan, dmachan_len, "tx%d", channel);
*fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_TXFIFO +
(channel * TEGRA30_AHUB_CHANNEL_TXFIFO_STRIDE);
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
val = tegra30_apbif_read(reg);
val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
tegra30_apbif_write(reg, val);
cif_conf.threshold = 0;
cif_conf.audio_channels = 2;
cif_conf.client_channels = 2;
cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
cif_conf.expand = 0;
cif_conf.stereo_conv = 0;
cif_conf.replicate = 0;
cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
cif_conf.truncate = 0;
cif_conf.mono_conv = 0;
reg = TEGRA30_AHUB_CIF_TX_CTRL +
(channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_tx_fifo);
int tegra30_ahub_enable_tx_fifo(enum tegra30_ahub_txcif txcif)
{
int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
int reg, val;
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
val = tegra30_apbif_read(reg);
val |= TEGRA30_AHUB_CHANNEL_CTRL_TX_EN;
tegra30_apbif_write(reg, val);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_enable_tx_fifo);
int tegra30_ahub_disable_tx_fifo(enum tegra30_ahub_txcif txcif)
{
int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
int reg, val;
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_CHANNEL_CTRL +
(channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
val = tegra30_apbif_read(reg);
val &= ~TEGRA30_AHUB_CHANNEL_CTRL_TX_EN;
tegra30_apbif_write(reg, val);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_disable_tx_fifo);
int tegra30_ahub_free_tx_fifo(enum tegra30_ahub_txcif txcif)
{
int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
__clear_bit(channel, ahub->tx_usage);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_free_tx_fifo);
int tegra30_ahub_set_rx_cif_source(enum tegra30_ahub_rxcif rxcif,
enum tegra30_ahub_txcif txcif)
{
int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
int reg;
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_AUDIO_RX +
(channel * TEGRA30_AHUB_AUDIO_RX_STRIDE);
tegra30_audio_write(reg, 1 << txcif);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_set_rx_cif_source);
int tegra30_ahub_unset_rx_cif_source(enum tegra30_ahub_rxcif rxcif)
{
int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
int reg;
pm_runtime_get_sync(ahub->dev);
reg = TEGRA30_AHUB_AUDIO_RX +
(channel * TEGRA30_AHUB_AUDIO_RX_STRIDE);
tegra30_audio_write(reg, 0);
pm_runtime_put(ahub->dev);
return 0;
}
EXPORT_SYMBOL_GPL(tegra30_ahub_unset_rx_cif_source);
#define MOD_LIST_MASK_TEGRA30 BIT(0)
#define MOD_LIST_MASK_TEGRA114 BIT(1)
#define MOD_LIST_MASK_TEGRA124 BIT(2)
#define MOD_LIST_MASK_TEGRA30_OR_LATER \
(MOD_LIST_MASK_TEGRA30 | MOD_LIST_MASK_TEGRA114 | \
MOD_LIST_MASK_TEGRA124)
#define MOD_LIST_MASK_TEGRA114_OR_LATER \
(MOD_LIST_MASK_TEGRA114 | MOD_LIST_MASK_TEGRA124)
static const struct {
const char *rst_name;
u32 mod_list_mask;
} configlink_mods[] = {
{ "i2s0", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s1", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s2", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s3", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s4", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "dam0", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "dam1", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "dam2", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "spdif", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "amx", MOD_LIST_MASK_TEGRA114_OR_LATER },
{ "adx", MOD_LIST_MASK_TEGRA114_OR_LATER },
{ "amx1", MOD_LIST_MASK_TEGRA124 },
{ "adx1", MOD_LIST_MASK_TEGRA124 },
{ "afc0", MOD_LIST_MASK_TEGRA124 },
{ "afc1", MOD_LIST_MASK_TEGRA124 },
{ "afc2", MOD_LIST_MASK_TEGRA124 },
{ "afc3", MOD_LIST_MASK_TEGRA124 },
{ "afc4", MOD_LIST_MASK_TEGRA124 },
{ "afc5", MOD_LIST_MASK_TEGRA124 },
};
#define LAST_REG(name) \
(TEGRA30_AHUB_##name + \
(TEGRA30_AHUB_##name##_STRIDE * TEGRA30_AHUB_##name##_COUNT) - 4)
#define REG_IN_ARRAY(reg, name) \
((reg >= TEGRA30_AHUB_##name) && \
(reg <= LAST_REG(name) && \
(!((reg - TEGRA30_AHUB_##name) % TEGRA30_AHUB_##name##_STRIDE))))
static bool tegra30_ahub_apbif_wr_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case TEGRA30_AHUB_CONFIG_LINK_CTRL:
case TEGRA30_AHUB_MISC_CTRL:
case TEGRA30_AHUB_APBDMA_LIVE_STATUS:
case TEGRA30_AHUB_I2S_LIVE_STATUS:
case TEGRA30_AHUB_SPDIF_LIVE_STATUS:
case TEGRA30_AHUB_I2S_INT_MASK:
case TEGRA30_AHUB_DAM_INT_MASK:
case TEGRA30_AHUB_SPDIF_INT_MASK:
case TEGRA30_AHUB_APBIF_INT_MASK:
case TEGRA30_AHUB_I2S_INT_STATUS:
case TEGRA30_AHUB_DAM_INT_STATUS:
case TEGRA30_AHUB_SPDIF_INT_STATUS:
case TEGRA30_AHUB_APBIF_INT_STATUS:
case TEGRA30_AHUB_I2S_INT_SOURCE:
case TEGRA30_AHUB_DAM_INT_SOURCE:
case TEGRA30_AHUB_SPDIF_INT_SOURCE:
case TEGRA30_AHUB_APBIF_INT_SOURCE:
case TEGRA30_AHUB_I2S_INT_SET:
case TEGRA30_AHUB_DAM_INT_SET:
case TEGRA30_AHUB_SPDIF_INT_SET:
case TEGRA30_AHUB_APBIF_INT_SET:
return true;
default:
break;
}
if (REG_IN_ARRAY(reg, CHANNEL_CTRL) ||
REG_IN_ARRAY(reg, CHANNEL_CLEAR) ||
REG_IN_ARRAY(reg, CHANNEL_STATUS) ||
REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
REG_IN_ARRAY(reg, CHANNEL_RXFIFO) ||
REG_IN_ARRAY(reg, CIF_TX_CTRL) ||
REG_IN_ARRAY(reg, CIF_RX_CTRL) ||
REG_IN_ARRAY(reg, DAM_LIVE_STATUS))
return true;
return false;
}
static bool tegra30_ahub_apbif_volatile_reg(struct device *dev,
unsigned int reg)
{
switch (reg) {
case TEGRA30_AHUB_CONFIG_LINK_CTRL:
case TEGRA30_AHUB_MISC_CTRL:
case TEGRA30_AHUB_APBDMA_LIVE_STATUS:
case TEGRA30_AHUB_I2S_LIVE_STATUS:
case TEGRA30_AHUB_SPDIF_LIVE_STATUS:
case TEGRA30_AHUB_I2S_INT_STATUS:
case TEGRA30_AHUB_DAM_INT_STATUS:
case TEGRA30_AHUB_SPDIF_INT_STATUS:
case TEGRA30_AHUB_APBIF_INT_STATUS:
case TEGRA30_AHUB_I2S_INT_SET:
case TEGRA30_AHUB_DAM_INT_SET:
case TEGRA30_AHUB_SPDIF_INT_SET:
case TEGRA30_AHUB_APBIF_INT_SET:
return true;
default:
break;
}
if (REG_IN_ARRAY(reg, CHANNEL_CLEAR) ||
REG_IN_ARRAY(reg, CHANNEL_STATUS) ||
REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
REG_IN_ARRAY(reg, CHANNEL_RXFIFO) ||
REG_IN_ARRAY(reg, DAM_LIVE_STATUS))
return true;
return false;
}
static bool tegra30_ahub_apbif_precious_reg(struct device *dev,
unsigned int reg)
{
if (REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
REG_IN_ARRAY(reg, CHANNEL_RXFIFO))
return true;
return false;
}
static const struct regmap_config tegra30_ahub_apbif_regmap_config = {
.name = "apbif",
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = TEGRA30_AHUB_APBIF_INT_SET,
.writeable_reg = tegra30_ahub_apbif_wr_rd_reg,
.readable_reg = tegra30_ahub_apbif_wr_rd_reg,
.volatile_reg = tegra30_ahub_apbif_volatile_reg,
.precious_reg = tegra30_ahub_apbif_precious_reg,
.cache_type = REGCACHE_FLAT,
};
static bool tegra30_ahub_ahub_wr_rd_reg(struct device *dev, unsigned int reg)
{
if (REG_IN_ARRAY(reg, AUDIO_RX))
return true;
return false;
}
static const struct regmap_config tegra30_ahub_ahub_regmap_config = {
.name = "ahub",
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = LAST_REG(AUDIO_RX),
.writeable_reg = tegra30_ahub_ahub_wr_rd_reg,
.readable_reg = tegra30_ahub_ahub_wr_rd_reg,
.cache_type = REGCACHE_FLAT,
};
static struct tegra30_ahub_soc_data soc_data_tegra30 = {
.mod_list_mask = MOD_LIST_MASK_TEGRA30,
.set_audio_cif = tegra30_ahub_set_cif,
};
static struct tegra30_ahub_soc_data soc_data_tegra114 = {
.mod_list_mask = MOD_LIST_MASK_TEGRA114,
.set_audio_cif = tegra30_ahub_set_cif,
};
static struct tegra30_ahub_soc_data soc_data_tegra124 = {
.mod_list_mask = MOD_LIST_MASK_TEGRA124,
.set_audio_cif = tegra124_ahub_set_cif,
};
static const struct of_device_id tegra30_ahub_of_match[] = {
{ .compatible = "nvidia,tegra124-ahub", .data = &soc_data_tegra124 },
{ .compatible = "nvidia,tegra114-ahub", .data = &soc_data_tegra114 },
{ .compatible = "nvidia,tegra30-ahub", .data = &soc_data_tegra30 },
{},
};
static int tegra30_ahub_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
const struct tegra30_ahub_soc_data *soc_data;
struct reset_control *rst;
int i;
struct resource *res0, *res1, *region;
void __iomem *regs_apbif, *regs_ahub;
int ret = 0;
if (ahub)
return -ENODEV;
match = of_match_device(tegra30_ahub_of_match, &pdev->dev);
if (!match)
return -EINVAL;
soc_data = match->data;
/*
* The AHUB hosts a register bus: the "configlink". For this to
* operate correctly, all devices on this bus must be out of reset.
* Ensure that here.
*/
for (i = 0; i < ARRAY_SIZE(configlink_mods); i++) {
if (!(configlink_mods[i].mod_list_mask &
soc_data->mod_list_mask))
continue;
rst = reset_control_get(&pdev->dev,
configlink_mods[i].rst_name);
if (IS_ERR(rst)) {
dev_err(&pdev->dev, "Can't get reset %s\n",
configlink_mods[i].rst_name);
ret = PTR_ERR(rst);
goto err;
}
ret = reset_control_deassert(rst);
reset_control_put(rst);
if (ret)
goto err;
}
ahub = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_ahub),
GFP_KERNEL);
if (!ahub) {
dev_err(&pdev->dev, "Can't allocate tegra30_ahub\n");
ret = -ENOMEM;
goto err;
}
dev_set_drvdata(&pdev->dev, ahub);
ahub->soc_data = soc_data;
ahub->dev = &pdev->dev;
ahub->clk_d_audio = clk_get(&pdev->dev, "d_audio");
if (IS_ERR(ahub->clk_d_audio)) {
dev_err(&pdev->dev, "Can't retrieve ahub d_audio clock\n");
ret = PTR_ERR(ahub->clk_d_audio);
goto err;
}
ahub->clk_apbif = clk_get(&pdev->dev, "apbif");
if (IS_ERR(ahub->clk_apbif)) {
dev_err(&pdev->dev, "Can't retrieve ahub apbif clock\n");
ret = PTR_ERR(ahub->clk_apbif);
goto err_clk_put_d_audio;
}
res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res0) {
dev_err(&pdev->dev, "No apbif memory resource\n");
ret = -ENODEV;
goto err_clk_put_apbif;
}
region = devm_request_mem_region(&pdev->dev, res0->start,
resource_size(res0), DRV_NAME);
if (!region) {
dev_err(&pdev->dev, "request region apbif failed\n");
ret = -EBUSY;
goto err_clk_put_apbif;
}
ahub->apbif_addr = res0->start;
regs_apbif = devm_ioremap(&pdev->dev, res0->start,
resource_size(res0));
if (!regs_apbif) {
dev_err(&pdev->dev, "ioremap apbif failed\n");
ret = -ENOMEM;
goto err_clk_put_apbif;
}
ahub->regmap_apbif = devm_regmap_init_mmio(&pdev->dev, regs_apbif,
&tegra30_ahub_apbif_regmap_config);
if (IS_ERR(ahub->regmap_apbif)) {
dev_err(&pdev->dev, "apbif regmap init failed\n");
ret = PTR_ERR(ahub->regmap_apbif);
goto err_clk_put_apbif;
}
regcache_cache_only(ahub->regmap_apbif, true);
res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res1) {
dev_err(&pdev->dev, "No ahub memory resource\n");
ret = -ENODEV;
goto err_clk_put_apbif;
}
region = devm_request_mem_region(&pdev->dev, res1->start,
resource_size(res1), DRV_NAME);
if (!region) {
dev_err(&pdev->dev, "request region ahub failed\n");
ret = -EBUSY;
goto err_clk_put_apbif;
}
regs_ahub = devm_ioremap(&pdev->dev, res1->start,
resource_size(res1));
if (!regs_ahub) {
dev_err(&pdev->dev, "ioremap ahub failed\n");
ret = -ENOMEM;
goto err_clk_put_apbif;
}
ahub->regmap_ahub = devm_regmap_init_mmio(&pdev->dev, regs_ahub,
&tegra30_ahub_ahub_regmap_config);
if (IS_ERR(ahub->regmap_ahub)) {
dev_err(&pdev->dev, "ahub regmap init failed\n");
ret = PTR_ERR(ahub->regmap_ahub);
goto err_clk_put_apbif;
}
regcache_cache_only(ahub->regmap_ahub, true);
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = tegra30_ahub_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
return 0;
err_pm_disable:
pm_runtime_disable(&pdev->dev);
err_clk_put_apbif:
clk_put(ahub->clk_apbif);
err_clk_put_d_audio:
clk_put(ahub->clk_d_audio);
ahub = NULL;
err:
return ret;
}
static int tegra30_ahub_remove(struct platform_device *pdev)
{
if (!ahub)
return -ENODEV;
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
tegra30_ahub_runtime_suspend(&pdev->dev);
clk_put(ahub->clk_apbif);
clk_put(ahub->clk_d_audio);
ahub = NULL;
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int tegra30_ahub_suspend(struct device *dev)
{
regcache_mark_dirty(ahub->regmap_ahub);
regcache_mark_dirty(ahub->regmap_apbif);
return 0;
}
static int tegra30_ahub_resume(struct device *dev)
{
int ret;
ret = pm_runtime_get_sync(dev);
if (ret < 0)
return ret;
ret = regcache_sync(ahub->regmap_ahub);
ret |= regcache_sync(ahub->regmap_apbif);
pm_runtime_put(dev);
return ret;
}
#endif
static const struct dev_pm_ops tegra30_ahub_pm_ops = {
SET_RUNTIME_PM_OPS(tegra30_ahub_runtime_suspend,
tegra30_ahub_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(tegra30_ahub_suspend, tegra30_ahub_resume)
};
static struct platform_driver tegra30_ahub_driver = {
.probe = tegra30_ahub_probe,
.remove = tegra30_ahub_remove,
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.of_match_table = tegra30_ahub_of_match,
.pm = &tegra30_ahub_pm_ops,
},
};
module_platform_driver(tegra30_ahub_driver);
void tegra30_ahub_set_cif(struct regmap *regmap, unsigned int reg,
struct tegra30_ahub_cif_conf *conf)
{
unsigned int value;
value = (conf->threshold <<
TEGRA30_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
((conf->audio_channels - 1) <<
TEGRA30_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
((conf->client_channels - 1) <<
TEGRA30_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
(conf->audio_bits <<
TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_SHIFT) |
(conf->client_bits <<
TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_SHIFT) |
(conf->expand <<
TEGRA30_AUDIOCIF_CTRL_EXPAND_SHIFT) |
(conf->stereo_conv <<
TEGRA30_AUDIOCIF_CTRL_STEREO_CONV_SHIFT) |
(conf->replicate <<
TEGRA30_AUDIOCIF_CTRL_REPLICATE_SHIFT) |
(conf->direction <<
TEGRA30_AUDIOCIF_CTRL_DIRECTION_SHIFT) |
(conf->truncate <<
TEGRA30_AUDIOCIF_CTRL_TRUNCATE_SHIFT) |
(conf->mono_conv <<
TEGRA30_AUDIOCIF_CTRL_MONO_CONV_SHIFT);
regmap_write(regmap, reg, value);
}
EXPORT_SYMBOL_GPL(tegra30_ahub_set_cif);
void tegra124_ahub_set_cif(struct regmap *regmap, unsigned int reg,
struct tegra30_ahub_cif_conf *conf)
{
unsigned int value;
value = (conf->threshold <<
TEGRA124_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
((conf->audio_channels - 1) <<
TEGRA124_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
((conf->client_channels - 1) <<
TEGRA124_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
(conf->audio_bits <<
TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_SHIFT) |
(conf->client_bits <<
TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_SHIFT) |
(conf->expand <<
TEGRA30_AUDIOCIF_CTRL_EXPAND_SHIFT) |
(conf->stereo_conv <<
TEGRA30_AUDIOCIF_CTRL_STEREO_CONV_SHIFT) |
(conf->replicate <<
TEGRA30_AUDIOCIF_CTRL_REPLICATE_SHIFT) |
(conf->direction <<
TEGRA30_AUDIOCIF_CTRL_DIRECTION_SHIFT) |
(conf->truncate <<
TEGRA30_AUDIOCIF_CTRL_TRUNCATE_SHIFT) |
(conf->mono_conv <<
TEGRA30_AUDIOCIF_CTRL_MONO_CONV_SHIFT);
regmap_write(regmap, reg, value);
}
EXPORT_SYMBOL_GPL(tegra124_ahub_set_cif);
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Tegra30 AHUB driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, tegra30_ahub_of_match);
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