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Qualcomm ARM Based SoC Updates for 4.5

Browse source 
* Add WCNSS_CTRL client
 * Various Kconfig changes to fix build issues
 * Update SoC Qualcomm MAINTAINERS entry
 * Add SMP2P, SMSM, and SMEM state machine drivers
 * Add SMD-RPM support for existing platforms
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Merge tag 'qcom-soc-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers

Qualcomm ARM Based SoC Updates for 4.5

* Add WCNSS_CTRL client
* Various Kconfig changes to fix build issues
* Update SoC Qualcomm MAINTAINERS entry
* Add SMP2P, SMSM, and SMEM state machine drivers
* Add SMD-RPM support for existing platforms

* tag 'qcom-soc-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  MAINTAINERS: Change QCOM entries
  soc: qcom: smd-rpm: Add existing platform support
  soc: qcom: Introduce WCNSS_CTRL SMD client
  ARM: qcom: select ARM_CPU_SUSPEND for power management
  MAINTAINERS: Add rules for Qualcomm dts files
  soc: qcom: enable smsm/smp2p modular build
  serial: msm_serial: Make config tristate
  soc: qcom: smp2p: Qualcomm Shared Memory Point to Point
  soc: qcom: smsm: Add driver for Qualcomm SMSM
  soc: qcom: Introduce common SMEM state machine code

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2015-12-22 12:10:37 -08:00
parent 8483ff079d bbeaa59598
commit 47ec7e0b75
10 changed files with 1733 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
MAINTAINERS
View file

@ -1401,11 +1401,13 @@ S: Maintained
ARM/QUALCOMM SUPPORT
M: Kumar Gala <galak@codeaurora.org>
M: Andy Gross <agross@codeaurora.org>
M: David Brown <davidb@codeaurora.org>
M: Andy Gross <andy.gross@linaro.org>
M: David Brown <david.brown@linaro.org>
L: linux-arm-msm@vger.kernel.org
L: linux-soc@vger.kernel.org
S: Maintained
F: arch/arm/boot/dts/qcom-*.dts
F: arch/arm/boot/dts/qcom-*.dtsi
F: arch/arm/mach-qcom/
F: drivers/soc/qcom/
F: drivers/tty/serial/msm_serial.h
@ -1413,7 +1415,7 @@ F: drivers/tty/serial/msm_serial.c
F: drivers/*/pm8???-*
F: drivers/mfd/ssbi.c
F: drivers/firmware/qcom_scm.c
T: git git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux.git
ARM/RADISYS ENP2611 MACHINE SUPPORT
M: Lennert Buytenhek <kernel@wantstofly.org>

27
drivers/soc/qcom/Kconfig
View file

@ -13,6 +13,7 @@ config QCOM_GSBI
config QCOM_PM
bool "Qualcomm Power Management"
depends on ARCH_QCOM && !ARM64
select ARM_CPU_SUSPEND
select QCOM_SCM
help
QCOM Platform specific power driver to manage cores and L2 low power
@ -49,3 +50,29 @@ config QCOM_SMD_RPM
Say M here if you want to include support for the Qualcomm RPM as a
module. This will build a module called "qcom-smd-rpm".
config QCOM_SMEM_STATE
bool
config QCOM_SMP2P
tristate "Qualcomm Shared Memory Point to Point support"
depends on QCOM_SMEM
select QCOM_SMEM_STATE
help
Say yes here to support the Qualcomm Shared Memory Point to Point
protocol.
config QCOM_SMSM
tristate "Qualcomm Shared Memory State Machine"
depends on QCOM_SMEM
select QCOM_SMEM_STATE
help
Say yes here to support the Qualcomm Shared Memory State Machine.
The state machine is represented by bits in shared memory.
config QCOM_WCNSS_CTRL
tristate "Qualcomm WCNSS control driver"
depends on QCOM_SMD
help
Client driver for the WCNSS_CTRL SMD channel, used to download nv
firmware to a newly booted WCNSS chip.

4
drivers/soc/qcom/Makefile
View file

@ -3,3 +3,7 @@ obj-$(CONFIG_QCOM_PM) += spm.o
obj-$(CONFIG_QCOM_SMD) += smd.o
obj-$(CONFIG_QCOM_SMD_RPM) += smd-rpm.o
obj-$(CONFIG_QCOM_SMEM) += smem.o
obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
obj-$(CONFIG_QCOM_SMP2P) += smp2p.o
obj-$(CONFIG_QCOM_SMSM) += smsm.o
obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o

2
drivers/soc/qcom/smd-rpm.c
View file

@ -219,6 +219,8 @@ static void qcom_smd_rpm_remove(struct qcom_smd_device *sdev)
}
static const struct of_device_id qcom_smd_rpm_of_match[] = {
{ .compatible = "qcom,rpm-apq8084" },
{ .compatible = "qcom,rpm-msm8916" },
{ .compatible = "qcom,rpm-msm8974" },
{}
};

201
drivers/soc/qcom/smem_state.c Normal file
View file

@ -0,0 +1,201 @@
/*
* Copyright (c) 2015, Sony Mobile Communications Inc.
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*/
#include <linux/device.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smem_state.h>
static LIST_HEAD(smem_states);
static DEFINE_MUTEX(list_lock);
/**
* struct qcom_smem_state - state context
* @refcount: refcount for the state
* @orphan: boolean indicator that this state has been unregistered
* @list: entry in smem_states list
* @of_node: of_node to use for matching the state in DT
* @priv: implementation private data
* @ops: ops for the state
*/
struct qcom_smem_state {
struct kref refcount;
bool orphan;
struct list_head list;
struct device_node *of_node;
void *priv;
struct qcom_smem_state_ops ops;
};
/**
* qcom_smem_state_update_bits() - update the masked bits in state with value
* @state: state handle acquired by calling qcom_smem_state_get()
* @mask: bit mask for the change
* @value: new value for the masked bits
*
* Returns 0 on success, otherwise negative errno.
*/
int qcom_smem_state_update_bits(struct qcom_smem_state *state,
u32 mask,
u32 value)
{
if (state->orphan)
return -ENXIO;
if (!state->ops.update_bits)
return -ENOTSUPP;
return state->ops.update_bits(state->priv, mask, value);
}
EXPORT_SYMBOL_GPL(qcom_smem_state_update_bits);
static struct qcom_smem_state *of_node_to_state(struct device_node *np)
{
struct qcom_smem_state *state;
mutex_lock(&list_lock);
list_for_each_entry(state, &smem_states, list) {
if (state->of_node == np) {
kref_get(&state->refcount);
goto unlock;
}
}
state = ERR_PTR(-EPROBE_DEFER);
unlock:
mutex_unlock(&list_lock);
return state;
}
/**
* qcom_smem_state_get() - acquire handle to a state
* @dev: client device pointer
* @con_id: name of the state to lookup
* @bit: flags from the state reference, indicating which bit's affected
*
* Returns handle to the state, or ERR_PTR(). qcom_smem_state_put() must be
* called to release the returned state handle.
*/
struct qcom_smem_state *qcom_smem_state_get(struct device *dev,
const char *con_id,
unsigned *bit)
{
struct qcom_smem_state *state;
struct of_phandle_args args;
int index = 0;
int ret;
if (con_id) {
index = of_property_match_string(dev->of_node,
"qcom,state-names",
con_id);
if (index < 0) {
dev_err(dev, "missing qcom,state-names\n");
return ERR_PTR(index);
}
}
ret = of_parse_phandle_with_args(dev->of_node,
"qcom,state",
"#qcom,state-cells",
index,
&args);
if (ret) {
dev_err(dev, "failed to parse qcom,state property\n");
return ERR_PTR(ret);
}
if (args.args_count != 1) {
dev_err(dev, "invalid #qcom,state-cells\n");
return ERR_PTR(-EINVAL);
}
state = of_node_to_state(args.np);
if (IS_ERR(state))
goto put;
*bit = args.args[0];
put:
of_node_put(args.np);
return state;
}
EXPORT_SYMBOL_GPL(qcom_smem_state_get);
static void qcom_smem_state_release(struct kref *ref)
{
struct qcom_smem_state *state = container_of(ref, struct qcom_smem_state, refcount);
list_del(&state->list);
kfree(state);
}
/**
* qcom_smem_state_put() - release state handle
* @state: state handle to be released
*/
void qcom_smem_state_put(struct qcom_smem_state *state)
{
mutex_lock(&list_lock);
kref_put(&state->refcount, qcom_smem_state_release);
mutex_unlock(&list_lock);
}
EXPORT_SYMBOL_GPL(qcom_smem_state_put);
/**
* qcom_smem_state_register() - register a new state
* @of_node: of_node used for matching client lookups
* @ops: implementation ops
* @priv: implementation specific private data
*/
struct qcom_smem_state *qcom_smem_state_register(struct device_node *of_node,
const struct qcom_smem_state_ops *ops,
void *priv)
{
struct qcom_smem_state *state;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return ERR_PTR(-ENOMEM);
kref_init(&state->refcount);
state->of_node = of_node;
state->ops = *ops;
state->priv = priv;
mutex_lock(&list_lock);
list_add(&state->list, &smem_states);
mutex_unlock(&list_lock);
return state;
}
EXPORT_SYMBOL_GPL(qcom_smem_state_register);
/**
* qcom_smem_state_unregister() - unregister a registered state
* @state: state handle to be unregistered
*/
void qcom_smem_state_unregister(struct qcom_smem_state *state)
{
state->orphan = true;
qcom_smem_state_put(state);
}
EXPORT_SYMBOL_GPL(qcom_smem_state_unregister);

578
drivers/soc/qcom/smp2p.c Normal file
View file

@ -0,0 +1,578 @@
/*
* Copyright (c) 2015, Sony Mobile Communications AB.
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*/
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
#include <linux/spinlock.h>
/*
* The Shared Memory Point to Point (SMP2P) protocol facilitates communication
* of a single 32-bit value between two processors. Each value has a single
* writer (the local side) and a single reader (the remote side). Values are
* uniquely identified in the system by the directed edge (local processor ID
* to remote processor ID) and a string identifier.
*
* Each processor is responsible for creating the outgoing SMEM items and each
* item is writable by the local processor and readable by the remote
* processor. By using two separate SMEM items that are single-reader and
* single-writer, SMP2P does not require any remote locking mechanisms.
*
* The driver uses the Linux GPIO and interrupt framework to expose a virtual
* GPIO for each outbound entry and a virtual interrupt controller for each
* inbound entry.
*/
#define SMP2P_MAX_ENTRY 16
#define SMP2P_MAX_ENTRY_NAME 16
#define SMP2P_FEATURE_SSR_ACK 0x1
#define SMP2P_MAGIC 0x504d5324
/**
* struct smp2p_smem_item - in memory communication structure
* @magic: magic number
* @version: version - must be 1
* @features: features flag - currently unused
* @local_pid: processor id of sending end
* @remote_pid: processor id of receiving end
* @total_entries: number of entries - always SMP2P_MAX_ENTRY
* @valid_entries: number of allocated entries
* @flags:
* @entries: individual communication entries
* @name: name of the entry
* @value: content of the entry
*/
struct smp2p_smem_item {
u32 magic;
u8 version;
unsigned features:24;
u16 local_pid;
u16 remote_pid;
u16 total_entries;
u16 valid_entries;
u32 flags;
struct {
u8 name[SMP2P_MAX_ENTRY_NAME];
u32 value;
} entries[SMP2P_MAX_ENTRY];
} __packed;
/**
* struct smp2p_entry - driver context matching one entry
* @node: list entry to keep track of allocated entries
* @smp2p: reference to the device driver context
* @name: name of the entry, to match against smp2p_smem_item
* @value: pointer to smp2p_smem_item entry value
* @last_value: last handled value
* @domain: irq_domain for inbound entries
* @irq_enabled:bitmap to track enabled irq bits
* @irq_rising: bitmap to mark irq bits for rising detection
* @irq_falling:bitmap to mark irq bits for falling detection
* @state: smem state handle
* @lock: spinlock to protect read-modify-write of the value
*/
struct smp2p_entry {
struct list_head node;
struct qcom_smp2p *smp2p;
const char *name;
u32 *value;
u32 last_value;
struct irq_domain *domain;
DECLARE_BITMAP(irq_enabled, 32);
DECLARE_BITMAP(irq_rising, 32);
DECLARE_BITMAP(irq_falling, 32);
struct qcom_smem_state *state;
spinlock_t lock;
};
#define SMP2P_INBOUND 0
#define SMP2P_OUTBOUND 1
/**
* struct qcom_smp2p - device driver context
* @dev: device driver handle
* @in: pointer to the inbound smem item
* @smem_items: ids of the two smem items
* @valid_entries: already scanned inbound entries
* @local_pid: processor id of the inbound edge
* @remote_pid: processor id of the outbound edge
* @ipc_regmap: regmap for the outbound ipc
* @ipc_offset: offset within the regmap
* @ipc_bit: bit in regmap@offset to kick to signal remote processor
* @inbound: list of inbound entries
* @outbound: list of outbound entries
*/
struct qcom_smp2p {
struct device *dev;
struct smp2p_smem_item *in;
struct smp2p_smem_item *out;
unsigned smem_items[SMP2P_OUTBOUND + 1];
unsigned valid_entries;
unsigned local_pid;
unsigned remote_pid;
struct regmap *ipc_regmap;
int ipc_offset;
int ipc_bit;
struct list_head inbound;
struct list_head outbound;
};
static void qcom_smp2p_kick(struct qcom_smp2p *smp2p)
{
/* Make sure any updated data is written before the kick */
wmb();
regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit));
}
/**
* qcom_smp2p_intr() - interrupt handler for incoming notifications
* @irq: unused
* @data: smp2p driver context
*
* Handle notifications from the remote side to handle newly allocated entries
* or any changes to the state bits of existing entries.
*/
static irqreturn_t qcom_smp2p_intr(int irq, void *data)
{
struct smp2p_smem_item *in;
struct smp2p_entry *entry;
struct qcom_smp2p *smp2p = data;
unsigned smem_id = smp2p->smem_items[SMP2P_INBOUND];
unsigned pid = smp2p->remote_pid;
size_t size;
int irq_pin;
u32 status;
char buf[SMP2P_MAX_ENTRY_NAME];
u32 val;
int i;
in = smp2p->in;
/* Acquire smem item, if not already found */
if (!in) {
in = qcom_smem_get(pid, smem_id, &size);
if (IS_ERR(in)) {
dev_err(smp2p->dev,
"Unable to acquire remote smp2p item\n");
return IRQ_HANDLED;
}
smp2p->in = in;
}
/* Match newly created entries */
for (i = smp2p->valid_entries; i < in->valid_entries; i++) {
list_for_each_entry(entry, &smp2p->inbound, node) {
memcpy_fromio(buf, in->entries[i].name, sizeof(buf));
if (!strcmp(buf, entry->name)) {
entry->value = &in->entries[i].value;
break;
}
}
}
smp2p->valid_entries = i;
/* Fire interrupts based on any value changes */
list_for_each_entry(entry, &smp2p->inbound, node) {
/* Ignore entries not yet allocated by the remote side */
if (!entry->value)
continue;
val = readl(entry->value);
status = val ^ entry->last_value;
entry->last_value = val;
/* No changes of this entry? */
if (!status)
continue;
for_each_set_bit(i, entry->irq_enabled, 32) {
if (!(status & BIT(i)))
continue;
if ((val & BIT(i) && test_bit(i, entry->irq_rising)) ||
(!(val & BIT(i)) && test_bit(i, entry->irq_falling))) {
irq_pin = irq_find_mapping(entry->domain, i);
handle_nested_irq(irq_pin);
}
}
}
return IRQ_HANDLED;
}
static void smp2p_mask_irq(struct irq_data *irqd)
{
struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
clear_bit(irq, entry->irq_enabled);
}
static void smp2p_unmask_irq(struct irq_data *irqd)
{
struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
set_bit(irq, entry->irq_enabled);
}
static int smp2p_set_irq_type(struct irq_data *irqd, unsigned int type)
{
struct smp2p_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
if (!(type & IRQ_TYPE_EDGE_BOTH))
return -EINVAL;
if (type & IRQ_TYPE_EDGE_RISING)
set_bit(irq, entry->irq_rising);
else
clear_bit(irq, entry->irq_rising);
if (type & IRQ_TYPE_EDGE_FALLING)
set_bit(irq, entry->irq_falling);
else
clear_bit(irq, entry->irq_falling);
return 0;
}
static struct irq_chip smp2p_irq_chip = {
.name = "smp2p",
.irq_mask = smp2p_mask_irq,
.irq_unmask = smp2p_unmask_irq,
.irq_set_type = smp2p_set_irq_type,
};
static int smp2p_irq_map(struct irq_domain *d,
unsigned int irq,
irq_hw_number_t hw)
{
struct smp2p_entry *entry = d->host_data;
irq_set_chip_and_handler(irq, &smp2p_irq_chip, handle_level_irq);
irq_set_chip_data(irq, entry);
irq_set_nested_thread(irq, 1);
irq_set_noprobe(irq);
return 0;
}
static const struct irq_domain_ops smp2p_irq_ops = {
.map = smp2p_irq_map,
.xlate = irq_domain_xlate_twocell,
};
static int qcom_smp2p_inbound_entry(struct qcom_smp2p *smp2p,
struct smp2p_entry *entry,
struct device_node *node)
{
entry->domain = irq_domain_add_linear(node, 32, &smp2p_irq_ops, entry);
if (!entry->domain) {
dev_err(smp2p->dev, "failed to add irq_domain\n");
return -ENOMEM;
}
return 0;
}
static int smp2p_update_bits(void *data, u32 mask, u32 value)
{
struct smp2p_entry *entry = data;
u32 orig;
u32 val;
spin_lock(&entry->lock);
val = orig = readl(entry->value);
val &= ~mask;
val |= value;
writel(val, entry->value);
spin_unlock(&entry->lock);
if (val != orig)
qcom_smp2p_kick(entry->smp2p);
return 0;
}
static const struct qcom_smem_state_ops smp2p_state_ops = {
.update_bits = smp2p_update_bits,
};
static int qcom_smp2p_outbound_entry(struct qcom_smp2p *smp2p,
struct smp2p_entry *entry,
struct device_node *node)
{
struct smp2p_smem_item *out = smp2p->out;
char buf[SMP2P_MAX_ENTRY_NAME] = {};
/* Allocate an entry from the smem item */
strlcpy(buf, entry->name, SMP2P_MAX_ENTRY_NAME);
memcpy_toio(out->entries[out->valid_entries].name, buf, SMP2P_MAX_ENTRY_NAME);
out->valid_entries++;
/* Make the logical entry reference the physical value */
entry->value = &out->entries[out->valid_entries].value;
entry->state = qcom_smem_state_register(node, &smp2p_state_ops, entry);
if (IS_ERR(entry->state)) {
dev_err(smp2p->dev, "failed to register qcom_smem_state\n");
return PTR_ERR(entry->state);
}
return 0;
}
static int qcom_smp2p_alloc_outbound_item(struct qcom_smp2p *smp2p)
{
struct smp2p_smem_item *out;
unsigned smem_id = smp2p->smem_items[SMP2P_OUTBOUND];
unsigned pid = smp2p->remote_pid;
int ret;
ret = qcom_smem_alloc(pid, smem_id, sizeof(*out));
if (ret < 0 && ret != -EEXIST) {
if (ret != -EPROBE_DEFER)
dev_err(smp2p->dev,
"unable to allocate local smp2p item\n");
return ret;
}
out = qcom_smem_get(pid, smem_id, NULL);
if (IS_ERR(out)) {
dev_err(smp2p->dev, "Unable to acquire local smp2p item\n");
return PTR_ERR(out);
}
memset(out, 0, sizeof(*out));
out->magic = SMP2P_MAGIC;
out->local_pid = smp2p->local_pid;
out->remote_pid = smp2p->remote_pid;
out->total_entries = SMP2P_MAX_ENTRY;
out->valid_entries = 0;
/*
* Make sure the rest of the header is written before we validate the
* item by writing a valid version number.
*/
wmb();
out->version = 1;
qcom_smp2p_kick(smp2p);
smp2p->out = out;
return 0;
}
static int smp2p_parse_ipc(struct qcom_smp2p *smp2p)
{
struct device_node *syscon;
struct device *dev = smp2p->dev;
const char *key;
int ret;
syscon = of_parse_phandle(dev->of_node, "qcom,ipc", 0);
if (!syscon) {
dev_err(dev, "no qcom,ipc node\n");
return -ENODEV;
}
smp2p->ipc_regmap = syscon_node_to_regmap(syscon);
if (IS_ERR(smp2p->ipc_regmap))
return PTR_ERR(smp2p->ipc_regmap);
key = "qcom,ipc";
ret = of_property_read_u32_index(dev->of_node, key, 1, &smp2p->ipc_offset);
if (ret < 0) {
dev_err(dev, "no offset in %s\n", key);
return -EINVAL;
}
ret = of_property_read_u32_index(dev->of_node, key, 2, &smp2p->ipc_bit);
if (ret < 0) {
dev_err(dev, "no bit in %s\n", key);
return -EINVAL;
}
return 0;
}
static int qcom_smp2p_probe(struct platform_device *pdev)
{
struct smp2p_entry *entry;
struct device_node *node;
struct qcom_smp2p *smp2p;
const char *key;
int irq;
int ret;
smp2p = devm_kzalloc(&pdev->dev, sizeof(*smp2p), GFP_KERNEL);
if (!smp2p)
return -ENOMEM;
smp2p->dev = &pdev->dev;
INIT_LIST_HEAD(&smp2p->inbound);
INIT_LIST_HEAD(&smp2p->outbound);
platform_set_drvdata(pdev, smp2p);
ret = smp2p_parse_ipc(smp2p);
if (ret)
return ret;
key = "qcom,smem";
ret = of_property_read_u32_array(pdev->dev.of_node, key,
smp2p->smem_items, 2);
if (ret)
return ret;
key = "qcom,local-pid";
ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->local_pid);
if (ret < 0) {
dev_err(&pdev->dev, "failed to read %s\n", key);
return -EINVAL;
}
key = "qcom,remote-pid";
ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->remote_pid);
if (ret < 0) {
dev_err(&pdev->dev, "failed to read %s\n", key);
return -EINVAL;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "unable to acquire smp2p interrupt\n");
return irq;
}
ret = qcom_smp2p_alloc_outbound_item(smp2p);
if (ret < 0)
return ret;
for_each_available_child_of_node(pdev->dev.of_node, node) {
entry = devm_kzalloc(&pdev->dev, sizeof(*entry), GFP_KERNEL);
if (!entry) {
ret = -ENOMEM;
goto unwind_interfaces;
}
entry->smp2p = smp2p;
spin_lock_init(&entry->lock);
ret = of_property_read_string(node, "qcom,entry-name", &entry->name);
if (ret < 0)
goto unwind_interfaces;
if (of_property_read_bool(node, "interrupt-controller")) {
ret = qcom_smp2p_inbound_entry(smp2p, entry, node);
if (ret < 0)
goto unwind_interfaces;
list_add(&entry->node, &smp2p->inbound);
} else {
ret = qcom_smp2p_outbound_entry(smp2p, entry, node);
if (ret < 0)
goto unwind_interfaces;
list_add(&entry->node, &smp2p->outbound);
}
}
/* Kick the outgoing edge after allocating entries */
qcom_smp2p_kick(smp2p);
ret = devm_request_threaded_irq(&pdev->dev, irq,
NULL, qcom_smp2p_intr,
IRQF_ONESHOT,
"smp2p", (void *)smp2p);
if (ret) {
dev_err(&pdev->dev, "failed to request interrupt\n");
goto unwind_interfaces;
}
return 0;
unwind_interfaces:
list_for_each_entry(entry, &smp2p->inbound, node)
irq_domain_remove(entry->domain);
list_for_each_entry(entry, &smp2p->outbound, node)
qcom_smem_state_unregister(entry->state);
smp2p->out->valid_entries = 0;
return ret;
}
static int qcom_smp2p_remove(struct platform_device *pdev)
{
struct qcom_smp2p *smp2p = platform_get_drvdata(pdev);
struct smp2p_entry *entry;
list_for_each_entry(entry, &smp2p->inbound, node)
irq_domain_remove(entry->domain);
list_for_each_entry(entry, &smp2p->outbound, node)
qcom_smem_state_unregister(entry->state);
smp2p->out->valid_entries = 0;
return 0;
}
static const struct of_device_id qcom_smp2p_of_match[] = {
{ .compatible = "qcom,smp2p" },
{}
};
MODULE_DEVICE_TABLE(of, qcom_smp2p_of_match);
static struct platform_driver qcom_smp2p_driver = {
.probe = qcom_smp2p_probe,
.remove = qcom_smp2p_remove,
.driver = {
.name = "qcom_smp2p",
.of_match_table = qcom_smp2p_of_match,
},
};
module_platform_driver(qcom_smp2p_driver);
MODULE_DESCRIPTION("Qualcomm Shared Memory Point to Point driver");
MODULE_LICENSE("GPL v2");

625
drivers/soc/qcom/smsm.c Normal file
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@ -0,0 +1,625 @@
/*
* Copyright (c) 2015, Sony Mobile Communications Inc.
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*/
#include <linux/interrupt.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/regmap.h>
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
/*
* This driver implements the Qualcomm Shared Memory State Machine, a mechanism
* for communicating single bit state information to remote processors.
*
* The implementation is based on two sections of shared memory; the first
* holding the state bits and the second holding a matrix of subscription bits.
*
* The state bits are structured in entries of 32 bits, each belonging to one
* system in the SoC. The entry belonging to the local system is considered
* read-write, while the rest should be considered read-only.
*
* The subscription matrix consists of N bitmaps per entry, denoting interest
* in updates of the entry for each of the N hosts. Upon updating a state bit
* each host's subscription bitmap should be queried and the remote system
* should be interrupted if they request so.
*
* The subscription matrix is laid out in entry-major order:
* entry0: [host0 ... hostN]
* .
* .
* entryM: [host0 ... hostN]
*
* A third, optional, shared memory region might contain information regarding
* the number of entries in the state bitmap as well as number of columns in
* the subscription matrix.
*/
/*
* Shared memory identifiers, used to acquire handles to respective memory
* region.
*/
#define SMEM_SMSM_SHARED_STATE 85
#define SMEM_SMSM_CPU_INTR_MASK 333
#define SMEM_SMSM_SIZE_INFO 419
/*
* Default sizes, in case SMEM_SMSM_SIZE_INFO is not found.
*/
#define SMSM_DEFAULT_NUM_ENTRIES 8
#define SMSM_DEFAULT_NUM_HOSTS 3
struct smsm_entry;
struct smsm_host;
/**
* struct qcom_smsm - smsm driver context
* @dev: smsm device pointer
* @local_host: column in the subscription matrix representing this system
* @num_hosts: number of columns in the subscription matrix
* @num_entries: number of entries in the state map and rows in the subscription
* matrix
* @local_state: pointer to the local processor's state bits
* @subscription: pointer to local processor's row in subscription matrix
* @state: smem state handle
* @lock: spinlock for read-modify-write of the outgoing state
* @entries: context for each of the entries
* @hosts: context for each of the hosts
*/
struct qcom_smsm {
struct device *dev;
u32 local_host;
u32 num_hosts;
u32 num_entries;
u32 *local_state;
u32 *subscription;
struct qcom_smem_state *state;
spinlock_t lock;
struct smsm_entry *entries;
struct smsm_host *hosts;
};
/**
* struct smsm_entry - per remote processor entry context
* @smsm: back-reference to driver context
* @domain: IRQ domain for this entry, if representing a remote system
* @irq_enabled: bitmap of which state bits IRQs are enabled
* @irq_rising: bitmap tracking if rising bits should be propagated
* @irq_falling: bitmap tracking if falling bits should be propagated
* @last_value: snapshot of state bits last time the interrupts where propagated
* @remote_state: pointer to this entry's state bits
* @subscription: pointer to a row in the subscription matrix representing this
* entry
*/
struct smsm_entry {
struct qcom_smsm *smsm;
struct irq_domain *domain;
DECLARE_BITMAP(irq_enabled, 32);
DECLARE_BITMAP(irq_rising, 32);
DECLARE_BITMAP(irq_falling, 32);
u32 last_value;
u32 *remote_state;
u32 *subscription;
};
/**
* struct smsm_host - representation of a remote host
* @ipc_regmap: regmap for outgoing interrupt
* @ipc_offset: offset in @ipc_regmap for outgoing interrupt
* @ipc_bit: bit in @ipc_regmap + @ipc_offset for outgoing interrupt
*/
struct smsm_host {
struct regmap *ipc_regmap;
int ipc_offset;
int ipc_bit;
};
/**
* smsm_update_bits() - change bit in outgoing entry and inform subscribers
* @data: smsm context pointer
* @offset: bit in the entry
* @value: new value
*
* Used to set and clear the bits in the outgoing/local entry and inform
* subscribers about the change.
*/
static int smsm_update_bits(void *data, u32 mask, u32 value)
{
struct qcom_smsm *smsm = data;
struct smsm_host *hostp;
unsigned long flags;
u32 changes;
u32 host;
u32 orig;
u32 val;
spin_lock_irqsave(&smsm->lock, flags);
/* Update the entry */
val = orig = readl(smsm->local_state);
val &= ~mask;
val |= value;
/* Don't signal if we didn't change the value */
changes = val ^ orig;
if (!changes) {
spin_unlock_irqrestore(&smsm->lock, flags);
goto done;
}
/* Write out the new value */
writel(val, smsm->local_state);
spin_unlock_irqrestore(&smsm->lock, flags);
/* Make sure the value update is ordered before any kicks */
wmb();
/* Iterate over all hosts to check whom wants a kick */
for (host = 0; host < smsm->num_hosts; host++) {
hostp = &smsm->hosts[host];
val = readl(smsm->subscription + host);
if (val & changes && hostp->ipc_regmap) {
regmap_write(hostp->ipc_regmap,
hostp->ipc_offset,
BIT(hostp->ipc_bit));
}
}
done:
return 0;
}
static const struct qcom_smem_state_ops smsm_state_ops = {
.update_bits = smsm_update_bits,
};
/**
* smsm_intr() - cascading IRQ handler for SMSM
* @irq: unused
* @data: entry related to this IRQ
*
* This function cascades an incoming interrupt from a remote system, based on
* the state bits and configuration.
*/
static irqreturn_t smsm_intr(int irq, void *data)
{
struct smsm_entry *entry = data;
unsigned i;
int irq_pin;
u32 changed;
u32 val;
val = readl(entry->remote_state);
changed = val ^ entry->last_value;
entry->last_value = val;
for_each_set_bit(i, entry->irq_enabled, 32) {
if (!(changed & BIT(i)))
continue;
if (val & BIT(i)) {
if (test_bit(i, entry->irq_rising)) {
irq_pin = irq_find_mapping(entry->domain, i);
handle_nested_irq(irq_pin);
}
} else {
if (test_bit(i, entry->irq_falling)) {
irq_pin = irq_find_mapping(entry->domain, i);
handle_nested_irq(irq_pin);
}
}
}
return IRQ_HANDLED;
}
/**
* smsm_mask_irq() - un-subscribe from cascades of IRQs of a certain staus bit
* @irqd: IRQ handle to be masked
*
* This un-subscribes the local CPU from interrupts upon changes to the defines
* status bit. The bit is also cleared from cascading.
*/
static void smsm_mask_irq(struct irq_data *irqd)
{
struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
struct qcom_smsm *smsm = entry->smsm;
u32 val;
if (entry->subscription) {
val = readl(entry->subscription + smsm->local_host);
val &= ~BIT(irq);
writel(val, entry->subscription + smsm->local_host);
}
clear_bit(irq, entry->irq_enabled);
}
/**
* smsm_unmask_irq() - subscribe to cascades of IRQs of a certain status bit
* @irqd: IRQ handle to be unmasked
*
* This subscribes the local CPU to interrupts upon changes to the defined
* status bit. The bit is also marked for cascading.
*/
static void smsm_unmask_irq(struct irq_data *irqd)
{
struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
struct qcom_smsm *smsm = entry->smsm;
u32 val;
set_bit(irq, entry->irq_enabled);
if (entry->subscription) {
val = readl(entry->subscription + smsm->local_host);
val |= BIT(irq);
writel(val, entry->subscription + smsm->local_host);
}
}
/**
* smsm_set_irq_type() - updates the requested IRQ type for the cascading
* @irqd: consumer interrupt handle
* @type: requested flags
*/
static int smsm_set_irq_type(struct irq_data *irqd, unsigned int type)
{
struct smsm_entry *entry = irq_data_get_irq_chip_data(irqd);
irq_hw_number_t irq = irqd_to_hwirq(irqd);
if (!(type & IRQ_TYPE_EDGE_BOTH))
return -EINVAL;
if (type & IRQ_TYPE_EDGE_RISING)
set_bit(irq, entry->irq_rising);
else
clear_bit(irq, entry->irq_rising);
if (type & IRQ_TYPE_EDGE_FALLING)
set_bit(irq, entry->irq_falling);
else
clear_bit(irq, entry->irq_falling);
return 0;
}
static struct irq_chip smsm_irq_chip = {
.name = "smsm",
.irq_mask = smsm_mask_irq,
.irq_unmask = smsm_unmask_irq,
.irq_set_type = smsm_set_irq_type,
};
/**
* smsm_irq_map() - sets up a mapping for a cascaded IRQ
* @d: IRQ domain representing an entry
* @irq: IRQ to set up
* @hw: unused
*/
static int smsm_irq_map(struct irq_domain *d,
unsigned int irq,
irq_hw_number_t hw)
{
struct smsm_entry *entry = d->host_data;
irq_set_chip_and_handler(irq, &smsm_irq_chip, handle_level_irq);
irq_set_chip_data(irq, entry);
irq_set_nested_thread(irq, 1);
return 0;
}
static const struct irq_domain_ops smsm_irq_ops = {
.map = smsm_irq_map,
.xlate = irq_domain_xlate_twocell,
};
/**
* smsm_parse_ipc() - parses a qcom,ipc-%d device tree property
* @smsm: smsm driver context
* @host_id: index of the remote host to be resolved
*
* Parses device tree to acquire the information needed for sending the
* outgoing interrupts to a remote host - identified by @host_id.
*/
static int smsm_parse_ipc(struct qcom_smsm *smsm, unsigned host_id)
{
struct device_node *syscon;
struct device_node *node = smsm->dev->of_node;
struct smsm_host *host = &smsm->hosts[host_id];
char key[16];
int ret;
snprintf(key, sizeof(key), "qcom,ipc-%d", host_id);
syscon = of_parse_phandle(node, key, 0);
if (!syscon)
return 0;
host->ipc_regmap = syscon_node_to_regmap(syscon);
if (IS_ERR(host->ipc_regmap))
return PTR_ERR(host->ipc_regmap);
ret = of_property_read_u32_index(node, key, 1, &host->ipc_offset);
if (ret < 0) {
dev_err(smsm->dev, "no offset in %s\n", key);
return -EINVAL;
}
ret = of_property_read_u32_index(node, key, 2, &host->ipc_bit);
if (ret < 0) {
dev_err(smsm->dev, "no bit in %s\n", key);
return -EINVAL;
}
return 0;
}
/**
* smsm_inbound_entry() - parse DT and set up an entry representing a remote system
* @smsm: smsm driver context
* @entry: entry context to be set up
* @node: dt node containing the entry's properties
*/
static int smsm_inbound_entry(struct qcom_smsm *smsm,
struct smsm_entry *entry,
struct device_node *node)
{
int ret;
int irq;
irq = irq_of_parse_and_map(node, 0);
if (!irq) {
dev_err(smsm->dev, "failed to parse smsm interrupt\n");
return -EINVAL;
}
ret = devm_request_threaded_irq(smsm->dev, irq,
NULL, smsm_intr,
IRQF_ONESHOT,
"smsm", (void *)entry);
if (ret) {
dev_err(smsm->dev, "failed to request interrupt\n");
return ret;
}
entry->domain = irq_domain_add_linear(node, 32, &smsm_irq_ops, entry);
if (!entry->domain) {
dev_err(smsm->dev, "failed to add irq_domain\n");
return -ENOMEM;
}
return 0;
}
/**
* smsm_get_size_info() - parse the optional memory segment for sizes
* @smsm: smsm driver context
*
* Attempt to acquire the number of hosts and entries from the optional shared
* memory location. Not being able to find this segment should indicate that
* we're on a older system where these values was hard coded to
* SMSM_DEFAULT_NUM_ENTRIES and SMSM_DEFAULT_NUM_HOSTS.
*
* Returns 0 on success, negative errno on failure.
*/
static int smsm_get_size_info(struct qcom_smsm *smsm)
{
size_t size;
struct {
u32 num_hosts;
u32 num_entries;
u32 reserved0;
u32 reserved1;
} *info;
info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_SMSM_SIZE_INFO, &size);
if (PTR_ERR(info) == -ENOENT || size != sizeof(*info)) {
dev_warn(smsm->dev, "no smsm size info, using defaults\n");
smsm->num_entries = SMSM_DEFAULT_NUM_ENTRIES;
smsm->num_hosts = SMSM_DEFAULT_NUM_HOSTS;
return 0;
} else if (IS_ERR(info)) {
dev_err(smsm->dev, "unable to retrieve smsm size info\n");
return PTR_ERR(info);
}
smsm->num_entries = info->num_entries;
smsm->num_hosts = info->num_hosts;
dev_dbg(smsm->dev,
"found custom size of smsm: %d entries %d hosts\n",
smsm->num_entries, smsm->num_hosts);
return 0;
}
static int qcom_smsm_probe(struct platform_device *pdev)
{
struct device_node *local_node;
struct device_node *node;
struct smsm_entry *entry;
struct qcom_smsm *smsm;
u32 *intr_mask;
size_t size;
u32 *states;
u32 id;
int ret;
smsm = devm_kzalloc(&pdev->dev, sizeof(*smsm), GFP_KERNEL);
if (!smsm)
return -ENOMEM;
smsm->dev = &pdev->dev;
spin_lock_init(&smsm->lock);
ret = smsm_get_size_info(smsm);
if (ret)
return ret;
smsm->entries = devm_kcalloc(&pdev->dev,
smsm->num_entries,
sizeof(struct smsm_entry),
GFP_KERNEL);
if (!smsm->entries)
return -ENOMEM;
smsm->hosts = devm_kcalloc(&pdev->dev,
smsm->num_hosts,
sizeof(struct smsm_host),
GFP_KERNEL);
if (!smsm->hosts)
return -ENOMEM;
local_node = of_find_node_with_property(pdev->dev.of_node, "#qcom,state-cells");
if (!local_node) {
dev_err(&pdev->dev, "no state entry\n");
return -EINVAL;
}
of_property_read_u32(pdev->dev.of_node,
"qcom,local-host",
&smsm->local_host);
/* Parse the host properties */
for (id = 0; id < smsm->num_hosts; id++) {
ret = smsm_parse_ipc(smsm, id);
if (ret < 0)
return ret;
}
/* Acquire the main SMSM state vector */
ret = qcom_smem_alloc(QCOM_SMEM_HOST_ANY, SMEM_SMSM_SHARED_STATE,
smsm->num_entries * sizeof(u32));
if (ret < 0 && ret != -EEXIST) {
dev_err(&pdev->dev, "unable to allocate shared state entry\n");
return ret;
}
states = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_SMSM_SHARED_STATE, NULL);
if (IS_ERR(states)) {
dev_err(&pdev->dev, "Unable to acquire shared state entry\n");
return PTR_ERR(states);
}
/* Acquire the list of interrupt mask vectors */
size = smsm->num_entries * smsm->num_hosts * sizeof(u32);
ret = qcom_smem_alloc(QCOM_SMEM_HOST_ANY, SMEM_SMSM_CPU_INTR_MASK, size);
if (ret < 0 && ret != -EEXIST) {
dev_err(&pdev->dev, "unable to allocate smsm interrupt mask\n");
return ret;
}
intr_mask = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_SMSM_CPU_INTR_MASK, NULL);
if (IS_ERR(intr_mask)) {
dev_err(&pdev->dev, "unable to acquire shared memory interrupt mask\n");
return PTR_ERR(intr_mask);
}
/* Setup the reference to the local state bits */
smsm->local_state = states + smsm->local_host;
smsm->subscription = intr_mask + smsm->local_host * smsm->num_hosts;
/* Register the outgoing state */
smsm->state = qcom_smem_state_register(local_node, &smsm_state_ops, smsm);
if (IS_ERR(smsm->state)) {
dev_err(smsm->dev, "failed to register qcom_smem_state\n");
return PTR_ERR(smsm->state);
}
/* Register handlers for remote processor entries of interest. */
for_each_available_child_of_node(pdev->dev.of_node, node) {
if (!of_property_read_bool(node, "interrupt-controller"))
continue;
ret = of_property_read_u32(node, "reg", &id);
if (ret || id >= smsm->num_entries) {
dev_err(&pdev->dev, "invalid reg of entry\n");
if (!ret)
ret = -EINVAL;
goto unwind_interfaces;
}
entry = &smsm->entries[id];
entry->smsm = smsm;
entry->remote_state = states + id;
/* Setup subscription pointers and unsubscribe to any kicks */
entry->subscription = intr_mask + id * smsm->num_hosts;
writel(0, entry->subscription + smsm->local_host);
ret = smsm_inbound_entry(smsm, entry, node);
if (ret < 0)
goto unwind_interfaces;
}
platform_set_drvdata(pdev, smsm);
return 0;
unwind_interfaces:
for (id = 0; id < smsm->num_entries; id++)
if (smsm->entries[id].domain)
irq_domain_remove(smsm->entries[id].domain);
qcom_smem_state_unregister(smsm->state);
return ret;
}
static int qcom_smsm_remove(struct platform_device *pdev)
{
struct qcom_smsm *smsm = platform_get_drvdata(pdev);
unsigned id;
for (id = 0; id < smsm->num_entries; id++)
if (smsm->entries[id].domain)
irq_domain_remove(smsm->entries[id].domain);
qcom_smem_state_unregister(smsm->state);
return 0;
}
static const struct of_device_id qcom_smsm_of_match[] = {
{ .compatible = "qcom,smsm" },
{}
};
MODULE_DEVICE_TABLE(of, qcom_smsm_of_match);
static struct platform_driver qcom_smsm_driver = {
.probe = qcom_smsm_probe,
.remove = qcom_smsm_remove,
.driver = {
.name = "qcom-smsm",
.of_match_table = qcom_smsm_of_match,
},
};
module_platform_driver(qcom_smsm_driver);
MODULE_DESCRIPTION("Qualcomm Shared Memory State Machine driver");
MODULE_LICENSE("GPL v2");

272
drivers/soc/qcom/wcnss_ctrl.c Normal file
View file

@ -0,0 +1,272 @@
/*
* Copyright (c) 2015, Sony Mobile Communications Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*/
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smd.h>
#define WCNSS_REQUEST_TIMEOUT (5 * HZ)
#define NV_FRAGMENT_SIZE 3072
#define NVBIN_FILE "wlan/prima/WCNSS_qcom_wlan_nv.bin"
/**
* struct wcnss_ctrl - driver context
* @dev: device handle
* @channel: SMD channel handle
* @ack: completion for outstanding requests
* @ack_status: status of the outstanding request
* @download_nv_work: worker for uploading nv binary
*/
struct wcnss_ctrl {
struct device *dev;
struct qcom_smd_channel *channel;
struct completion ack;
int ack_status;
struct work_struct download_nv_work;
};
/* message types */
enum {
WCNSS_VERSION_REQ = 0x01000000,
WCNSS_VERSION_RESP,
WCNSS_DOWNLOAD_NV_REQ,
WCNSS_DOWNLOAD_NV_RESP,
WCNSS_UPLOAD_CAL_REQ,
WCNSS_UPLOAD_CAL_RESP,
WCNSS_DOWNLOAD_CAL_REQ,
WCNSS_DOWNLOAD_CAL_RESP,
};
/**
* struct wcnss_msg_hdr - common packet header for requests and responses
* @type: packet message type
* @len: total length of the packet, including this header
*/
struct wcnss_msg_hdr {
u32 type;
u32 len;
} __packed;
/**
* struct wcnss_version_resp - version request response
* @hdr: common packet wcnss_msg_hdr header
*/
struct wcnss_version_resp {
struct wcnss_msg_hdr hdr;
u8 major;
u8 minor;
u8 version;
u8 revision;
} __packed;
/**
* struct wcnss_download_nv_req - firmware fragment request
* @hdr: common packet wcnss_msg_hdr header
* @seq: sequence number of this fragment
* @last: boolean indicator of this being the last fragment of the binary
* @frag_size: length of this fragment
* @fragment: fragment data
*/
struct wcnss_download_nv_req {
struct wcnss_msg_hdr hdr;
u16 seq;
u16 last;
u32 frag_size;
u8 fragment[];
} __packed;
/**
* struct wcnss_download_nv_resp - firmware download response
* @hdr: common packet wcnss_msg_hdr header
* @status: boolean to indicate success of the download
*/
struct wcnss_download_nv_resp {
struct wcnss_msg_hdr hdr;
u8 status;
} __packed;
/**
* wcnss_ctrl_smd_callback() - handler from SMD responses
* @qsdev: smd device handle
* @data: pointer to the incoming data packet
* @count: size of the incoming data packet
*
* Handles any incoming packets from the remote WCNSS_CTRL service.
*/
static int wcnss_ctrl_smd_callback(struct qcom_smd_device *qsdev,
const void *data,
size_t count)
{
struct wcnss_ctrl *wcnss = dev_get_drvdata(&qsdev->dev);
const struct wcnss_download_nv_resp *nvresp;
const struct wcnss_version_resp *version;
const struct wcnss_msg_hdr *hdr = data;
switch (hdr->type) {
case WCNSS_VERSION_RESP:
if (count != sizeof(*version)) {
dev_err(wcnss->dev,
"invalid size of version response\n");
break;
}
version = data;
dev_info(wcnss->dev, "WCNSS Version %d.%d %d.%d\n",
version->major, version->minor,
version->version, version->revision);
schedule_work(&wcnss->download_nv_work);
break;
case WCNSS_DOWNLOAD_NV_RESP:
if (count != sizeof(*nvresp)) {
dev_err(wcnss->dev,
"invalid size of download response\n");
break;
}
nvresp = data;
wcnss->ack_status = nvresp->status;
complete(&wcnss->ack);
break;
default:
dev_info(wcnss->dev, "unknown message type %d\n", hdr->type);
break;
}
return 0;
}
/**
* wcnss_request_version() - send a version request to WCNSS
* @wcnss: wcnss ctrl driver context
*/
static int wcnss_request_version(struct wcnss_ctrl *wcnss)
{
struct wcnss_msg_hdr msg;
msg.type = WCNSS_VERSION_REQ;
msg.len = sizeof(msg);
return qcom_smd_send(wcnss->channel, &msg, sizeof(msg));
}
/**
* wcnss_download_nv() - send nv binary to WCNSS
* @work: work struct to acquire wcnss context
*/
static void wcnss_download_nv(struct work_struct *work)
{
struct wcnss_ctrl *wcnss = container_of(work, struct wcnss_ctrl, download_nv_work);
struct wcnss_download_nv_req *req;
const struct firmware *fw;
const void *data;
ssize_t left;
int ret;
req = kzalloc(sizeof(*req) + NV_FRAGMENT_SIZE, GFP_KERNEL);
if (!req)
return;
ret = request_firmware(&fw, NVBIN_FILE, wcnss->dev);
if (ret) {
dev_err(wcnss->dev, "Failed to load nv file %s: %d\n",
NVBIN_FILE, ret);
goto free_req;
}
data = fw->data;
left = fw->size;
req->hdr.type = WCNSS_DOWNLOAD_NV_REQ;
req->hdr.len = sizeof(*req) + NV_FRAGMENT_SIZE;
req->last = 0;
req->frag_size = NV_FRAGMENT_SIZE;
req->seq = 0;
do {
if (left <= NV_FRAGMENT_SIZE) {
req->last = 1;
req->frag_size = left;
req->hdr.len = sizeof(*req) + left;
}
memcpy(req->fragment, data, req->frag_size);
ret = qcom_smd_send(wcnss->channel, req, req->hdr.len);
if (ret) {
dev_err(wcnss->dev, "failed to send smd packet\n");
goto release_fw;
}
/* Increment for next fragment */
req->seq++;
data += req->hdr.len;
left -= NV_FRAGMENT_SIZE;
} while (left > 0);
ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_REQUEST_TIMEOUT);
if (!ret)
dev_err(wcnss->dev, "timeout waiting for nv upload ack\n");
else if (wcnss->ack_status != 1)
dev_err(wcnss->dev, "nv upload response failed err: %d\n",
wcnss->ack_status);
release_fw:
release_firmware(fw);
free_req:
kfree(req);
}
static int wcnss_ctrl_probe(struct qcom_smd_device *sdev)
{
struct wcnss_ctrl *wcnss;
wcnss = devm_kzalloc(&sdev->dev, sizeof(*wcnss), GFP_KERNEL);
if (!wcnss)
return -ENOMEM;
wcnss->dev = &sdev->dev;
wcnss->channel = sdev->channel;
init_completion(&wcnss->ack);
INIT_WORK(&wcnss->download_nv_work, wcnss_download_nv);
dev_set_drvdata(&sdev->dev, wcnss);
return wcnss_request_version(wcnss);
}
static const struct qcom_smd_id wcnss_ctrl_smd_match[] = {
{ .name = "WCNSS_CTRL" },
{}
};
static struct qcom_smd_driver wcnss_ctrl_driver = {
.probe = wcnss_ctrl_probe,
.callback = wcnss_ctrl_smd_callback,
.smd_match_table = wcnss_ctrl_smd_match,
.driver = {
.name = "qcom_wcnss_ctrl",
.owner = THIS_MODULE,
},
};
module_qcom_smd_driver(wcnss_ctrl_driver);
MODULE_DESCRIPTION("Qualcomm WCNSS control driver");
MODULE_LICENSE("GPL v2");

2
drivers/tty/serial/Kconfig
View file

@ -1044,7 +1044,7 @@ config SERIAL_SGI_IOC3
say Y or M. Otherwise, say N.
config SERIAL_MSM
bool "MSM on-chip serial port support"
tristate "MSM on-chip serial port support"
depends on ARCH_QCOM
select SERIAL_CORE

18
include/linux/soc/qcom/smem_state.h Normal file
View file

@ -0,0 +1,18 @@
#ifndef __QCOM_SMEM_STATE__
#define __QCOM_SMEM_STATE__
struct qcom_smem_state;
struct qcom_smem_state_ops {
int (*update_bits)(void *, u32, u32);
};
struct qcom_smem_state *qcom_smem_state_get(struct device *dev, const char *con_id, unsigned *bit);
void qcom_smem_state_put(struct qcom_smem_state *);
int qcom_smem_state_update_bits(struct qcom_smem_state *state, u32 mask, u32 value);
struct qcom_smem_state *qcom_smem_state_register(struct device_node *of_node, const struct qcom_smem_state_ops *ops, void *data);
void qcom_smem_state_unregister(struct qcom_smem_state *state);
#endif