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1b1da99b84
linux/drivers/bus/ti-sysc.c
Tony Lindgren 1b1da99b84 bus: ti-sysc: Fix variable set but not used warning for reinit_modules 
Fix drivers/bus/ti-sysc.c:2494:13: error: variable 'error' set but not
used introduced by commit 9d88136120 ("bus: ti-sysc: Add quirk handling
for reinit on context lost").

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2021-10-06 08:38:09 +03:00

3451 lines
86 KiB
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// SPDX-License-Identifier: GPL-2.0
/*
* ti-sysc.c - Texas Instruments sysc interconnect target driver
*/
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/cpu_pm.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <linux/timekeeping.h>
#include <linux/iopoll.h>
#include <linux/platform_data/ti-sysc.h>
#include <dt-bindings/bus/ti-sysc.h>
#define DIS_ISP BIT(2)
#define DIS_IVA BIT(1)
#define DIS_SGX BIT(0)
#define SOC_FLAG(match, flag) { .machine = match, .data = (void *)(flag), }
#define MAX_MODULE_SOFTRESET_WAIT 10000
enum sysc_soc {
SOC_UNKNOWN,
SOC_2420,
SOC_2430,
SOC_3430,
SOC_3630,
SOC_4430,
SOC_4460,
SOC_4470,
SOC_5430,
SOC_AM3,
SOC_AM4,
SOC_DRA7,
};
struct sysc_address {
unsigned long base;
struct list_head node;
};
struct sysc_module {
struct sysc *ddata;
struct list_head node;
};
struct sysc_soc_info {
unsigned long general_purpose:1;
enum sysc_soc soc;
struct mutex list_lock; /* disabled and restored modules list lock */
struct list_head disabled_modules;
struct list_head restored_modules;
struct notifier_block nb;
};
enum sysc_clocks {
SYSC_FCK,
SYSC_ICK,
SYSC_OPTFCK0,
SYSC_OPTFCK1,
SYSC_OPTFCK2,
SYSC_OPTFCK3,
SYSC_OPTFCK4,
SYSC_OPTFCK5,
SYSC_OPTFCK6,
SYSC_OPTFCK7,
SYSC_MAX_CLOCKS,
};
static struct sysc_soc_info *sysc_soc;
static const char * const reg_names[] = { "rev", "sysc", "syss", };
static const char * const clock_names[SYSC_MAX_CLOCKS] = {
"fck", "ick", "opt0", "opt1", "opt2", "opt3", "opt4",
"opt5", "opt6", "opt7",
};
#define SYSC_IDLEMODE_MASK 3
#define SYSC_CLOCKACTIVITY_MASK 3
/**
* struct sysc - TI sysc interconnect target module registers and capabilities
* @dev: struct device pointer
* @module_pa: physical address of the interconnect target module
* @module_size: size of the interconnect target module
* @module_va: virtual address of the interconnect target module
* @offsets: register offsets from module base
* @mdata: ti-sysc to hwmod translation data for a module
* @clocks: clocks used by the interconnect target module
* @clock_roles: clock role names for the found clocks
* @nr_clocks: number of clocks used by the interconnect target module
* @rsts: resets used by the interconnect target module
* @legacy_mode: configured for legacy mode if set
* @cap: interconnect target module capabilities
* @cfg: interconnect target module configuration
* @cookie: data used by legacy platform callbacks
* @name: name if available
* @revision: interconnect target module revision
* @reserved: target module is reserved and already in use
* @enabled: sysc runtime enabled status
* @needs_resume: runtime resume needed on resume from suspend
* @child_needs_resume: runtime resume needed for child on resume from suspend
* @disable_on_idle: status flag used for disabling modules with resets
* @idle_work: work structure used to perform delayed idle on a module
* @pre_reset_quirk: module specific pre-reset quirk
* @post_reset_quirk: module specific post-reset quirk
* @reset_done_quirk: module specific reset done quirk
* @module_enable_quirk: module specific enable quirk
* @module_disable_quirk: module specific disable quirk
* @module_unlock_quirk: module specific sysconfig unlock quirk
* @module_lock_quirk: module specific sysconfig lock quirk
*/
struct sysc {
struct device *dev;
u64 module_pa;
u32 module_size;
void __iomem *module_va;
int offsets[SYSC_MAX_REGS];
struct ti_sysc_module_data *mdata;
struct clk **clocks;
const char **clock_roles;
int nr_clocks;
struct reset_control *rsts;
const char *legacy_mode;
const struct sysc_capabilities *cap;
struct sysc_config cfg;
struct ti_sysc_cookie cookie;
const char *name;
u32 revision;
u32 sysconfig;
unsigned int reserved:1;
unsigned int enabled:1;
unsigned int needs_resume:1;
unsigned int child_needs_resume:1;
struct delayed_work idle_work;
void (*pre_reset_quirk)(struct sysc *sysc);
void (*post_reset_quirk)(struct sysc *sysc);
void (*reset_done_quirk)(struct sysc *sysc);
void (*module_enable_quirk)(struct sysc *sysc);
void (*module_disable_quirk)(struct sysc *sysc);
void (*module_unlock_quirk)(struct sysc *sysc);
void (*module_lock_quirk)(struct sysc *sysc);
};
static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
bool is_child);
static int sysc_reset(struct sysc *ddata);
static void sysc_write(struct sysc *ddata, int offset, u32 value)
{
if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
writew_relaxed(value & 0xffff, ddata->module_va + offset);
/* Only i2c revision has LO and HI register with stride of 4 */
if (ddata->offsets[SYSC_REVISION] >= 0 &&
offset == ddata->offsets[SYSC_REVISION]) {
u16 hi = value >> 16;
writew_relaxed(hi, ddata->module_va + offset + 4);
}
return;
}
writel_relaxed(value, ddata->module_va + offset);
}
static u32 sysc_read(struct sysc *ddata, int offset)
{
if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
u32 val;
val = readw_relaxed(ddata->module_va + offset);
/* Only i2c revision has LO and HI register with stride of 4 */
if (ddata->offsets[SYSC_REVISION] >= 0 &&
offset == ddata->offsets[SYSC_REVISION]) {
u16 tmp = readw_relaxed(ddata->module_va + offset + 4);
val |= tmp << 16;
}
return val;
}
return readl_relaxed(ddata->module_va + offset);
}
static bool sysc_opt_clks_needed(struct sysc *ddata)
{
return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
}
static u32 sysc_read_revision(struct sysc *ddata)
{
int offset = ddata->offsets[SYSC_REVISION];
if (offset < 0)
return 0;
return sysc_read(ddata, offset);
}
static u32 sysc_read_sysconfig(struct sysc *ddata)
{
int offset = ddata->offsets[SYSC_SYSCONFIG];
if (offset < 0)
return 0;
return sysc_read(ddata, offset);
}
static u32 sysc_read_sysstatus(struct sysc *ddata)
{
int offset = ddata->offsets[SYSC_SYSSTATUS];
if (offset < 0)
return 0;
return sysc_read(ddata, offset);
}
static int sysc_poll_reset_sysstatus(struct sysc *ddata)
{
int error, retries;
u32 syss_done, rstval;
if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED)
syss_done = 0;
else
syss_done = ddata->cfg.syss_mask;
if (likely(!timekeeping_suspended)) {
error = readx_poll_timeout_atomic(sysc_read_sysstatus, ddata,
rstval, (rstval & ddata->cfg.syss_mask) ==
syss_done, 100, MAX_MODULE_SOFTRESET_WAIT);
} else {
retries = MAX_MODULE_SOFTRESET_WAIT;
while (retries--) {
rstval = sysc_read_sysstatus(ddata);
if ((rstval & ddata->cfg.syss_mask) == syss_done)
return 0;
udelay(2); /* Account for udelay flakeyness */
}
error = -ETIMEDOUT;
}
return error;
}
static int sysc_poll_reset_sysconfig(struct sysc *ddata)
{
int error, retries;
u32 sysc_mask, rstval;
sysc_mask = BIT(ddata->cap->regbits->srst_shift);
if (likely(!timekeeping_suspended)) {
error = readx_poll_timeout_atomic(sysc_read_sysconfig, ddata,
rstval, !(rstval & sysc_mask),
100, MAX_MODULE_SOFTRESET_WAIT);
} else {
retries = MAX_MODULE_SOFTRESET_WAIT;
while (retries--) {
rstval = sysc_read_sysconfig(ddata);
if (!(rstval & sysc_mask))
return 0;
udelay(2); /* Account for udelay flakeyness */
}
error = -ETIMEDOUT;
}
return error;
}
/* Poll on reset status */
static int sysc_wait_softreset(struct sysc *ddata)
{
int syss_offset, error = 0;
if (ddata->cap->regbits->srst_shift < 0)
return 0;
syss_offset = ddata->offsets[SYSC_SYSSTATUS];
if (syss_offset >= 0)
error = sysc_poll_reset_sysstatus(ddata);
else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS)
error = sysc_poll_reset_sysconfig(ddata);
return error;
}
static int sysc_add_named_clock_from_child(struct sysc *ddata,
const char *name,
const char *optfck_name)
{
struct device_node *np = ddata->dev->of_node;
struct device_node *child;
struct clk_lookup *cl;
struct clk *clock;
const char *n;
if (name)
n = name;
else
n = optfck_name;
/* Does the clock alias already exist? */
clock = of_clk_get_by_name(np, n);
if (!IS_ERR(clock)) {
clk_put(clock);
return 0;
}
child = of_get_next_available_child(np, NULL);
if (!child)
return -ENODEV;
clock = devm_get_clk_from_child(ddata->dev, child, name);
if (IS_ERR(clock))
return PTR_ERR(clock);
/*
* Use clkdev_add() instead of clkdev_alloc() to avoid the MAX_DEV_ID
* limit for clk_get(). If cl ever needs to be freed, it should be done
* with clkdev_drop().
*/
cl = kzalloc(sizeof(*cl), GFP_KERNEL);
if (!cl)
return -ENOMEM;
cl->con_id = n;
cl->dev_id = dev_name(ddata->dev);
cl->clk = clock;
clkdev_add(cl);
clk_put(clock);
return 0;
}
static int sysc_init_ext_opt_clock(struct sysc *ddata, const char *name)
{
const char *optfck_name;
int error, index;
if (ddata->nr_clocks < SYSC_OPTFCK0)
index = SYSC_OPTFCK0;
else
index = ddata->nr_clocks;
if (name)
optfck_name = name;
else
optfck_name = clock_names[index];
error = sysc_add_named_clock_from_child(ddata, name, optfck_name);
if (error)
return error;
ddata->clock_roles[index] = optfck_name;
ddata->nr_clocks++;
return 0;
}
static int sysc_get_one_clock(struct sysc *ddata, const char *name)
{
int error, i, index = -ENODEV;
if (!strncmp(clock_names[SYSC_FCK], name, 3))
index = SYSC_FCK;
else if (!strncmp(clock_names[SYSC_ICK], name, 3))
index = SYSC_ICK;
if (index < 0) {
for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
if (!ddata->clocks[i]) {
index = i;
break;
}
}
}
if (index < 0) {
dev_err(ddata->dev, "clock %s not added\n", name);
return index;
}
ddata->clocks[index] = devm_clk_get(ddata->dev, name);
if (IS_ERR(ddata->clocks[index])) {
dev_err(ddata->dev, "clock get error for %s: %li\n",
name, PTR_ERR(ddata->clocks[index]));
return PTR_ERR(ddata->clocks[index]);
}
error = clk_prepare(ddata->clocks[index]);
if (error) {
dev_err(ddata->dev, "clock prepare error for %s: %i\n",
name, error);
return error;
}
return 0;
}
static int sysc_get_clocks(struct sysc *ddata)
{
struct device_node *np = ddata->dev->of_node;
struct property *prop;
const char *name;
int nr_fck = 0, nr_ick = 0, i, error = 0;
ddata->clock_roles = devm_kcalloc(ddata->dev,
SYSC_MAX_CLOCKS,
sizeof(*ddata->clock_roles),
GFP_KERNEL);
if (!ddata->clock_roles)
return -ENOMEM;
of_property_for_each_string(np, "clock-names", prop, name) {
if (!strncmp(clock_names[SYSC_FCK], name, 3))
nr_fck++;
if (!strncmp(clock_names[SYSC_ICK], name, 3))
nr_ick++;
ddata->clock_roles[ddata->nr_clocks] = name;
ddata->nr_clocks++;
}
if (ddata->nr_clocks < 1)
return 0;
if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) {
error = sysc_init_ext_opt_clock(ddata, NULL);
if (error)
return error;
}
if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
dev_err(ddata->dev, "too many clocks for %pOF\n", np);
return -EINVAL;
}
if (nr_fck > 1 || nr_ick > 1) {
dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
return -EINVAL;
}
/* Always add a slot for main clocks fck and ick even if unused */
if (!nr_fck)
ddata->nr_clocks++;
if (!nr_ick)
ddata->nr_clocks++;
ddata->clocks = devm_kcalloc(ddata->dev,
ddata->nr_clocks, sizeof(*ddata->clocks),
GFP_KERNEL);
if (!ddata->clocks)
return -ENOMEM;
for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
const char *name = ddata->clock_roles[i];
if (!name)
continue;
error = sysc_get_one_clock(ddata, name);
if (error)
return error;
}
return 0;
}
static int sysc_enable_main_clocks(struct sysc *ddata)
{
struct clk *clock;
int i, error;
if (!ddata->clocks)
return 0;
for (i = 0; i < SYSC_OPTFCK0; i++) {
clock = ddata->clocks[i];
/* Main clocks may not have ick */
if (IS_ERR_OR_NULL(clock))
continue;
error = clk_enable(clock);
if (error)
goto err_disable;
}
return 0;
err_disable:
for (i--; i >= 0; i--) {
clock = ddata->clocks[i];
/* Main clocks may not have ick */
if (IS_ERR_OR_NULL(clock))
continue;
clk_disable(clock);
}
return error;
}
static void sysc_disable_main_clocks(struct sysc *ddata)
{
struct clk *clock;
int i;
if (!ddata->clocks)
return;
for (i = 0; i < SYSC_OPTFCK0; i++) {
clock = ddata->clocks[i];
if (IS_ERR_OR_NULL(clock))
continue;
clk_disable(clock);
}
}
static int sysc_enable_opt_clocks(struct sysc *ddata)
{
struct clk *clock;
int i, error;
if (!ddata->clocks || ddata->nr_clocks < SYSC_OPTFCK0 + 1)
return 0;
for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
clock = ddata->clocks[i];
/* Assume no holes for opt clocks */
if (IS_ERR_OR_NULL(clock))
return 0;
error = clk_enable(clock);
if (error)
goto err_disable;
}
return 0;
err_disable:
for (i--; i >= 0; i--) {
clock = ddata->clocks[i];
if (IS_ERR_OR_NULL(clock))
continue;
clk_disable(clock);
}
return error;
}
static void sysc_disable_opt_clocks(struct sysc *ddata)
{
struct clk *clock;
int i;
if (!ddata->clocks || ddata->nr_clocks < SYSC_OPTFCK0 + 1)
return;
for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
clock = ddata->clocks[i];
/* Assume no holes for opt clocks */
if (IS_ERR_OR_NULL(clock))
return;
clk_disable(clock);
}
}
static void sysc_clkdm_deny_idle(struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata;
if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
return;
pdata = dev_get_platdata(ddata->dev);
if (pdata && pdata->clkdm_deny_idle)
pdata->clkdm_deny_idle(ddata->dev, &ddata->cookie);
}
static void sysc_clkdm_allow_idle(struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata;
if (ddata->legacy_mode || (ddata->cfg.quirks & SYSC_QUIRK_CLKDM_NOAUTO))
return;
pdata = dev_get_platdata(ddata->dev);
if (pdata && pdata->clkdm_allow_idle)
pdata->clkdm_allow_idle(ddata->dev, &ddata->cookie);
}
/**
* sysc_init_resets - init rstctrl reset line if configured
* @ddata: device driver data
*
* See sysc_rstctrl_reset_deassert().
*/
static int sysc_init_resets(struct sysc *ddata)
{
ddata->rsts =
devm_reset_control_get_optional_shared(ddata->dev, "rstctrl");
return PTR_ERR_OR_ZERO(ddata->rsts);
}
/**
* sysc_parse_and_check_child_range - parses module IO region from ranges
* @ddata: device driver data
*
* In general we only need rev, syss, and sysc registers and not the whole
* module range. But we do want the offsets for these registers from the
* module base. This allows us to check them against the legacy hwmod
* platform data. Let's also check the ranges are configured properly.
*/
static int sysc_parse_and_check_child_range(struct sysc *ddata)
{
struct device_node *np = ddata->dev->of_node;
const __be32 *ranges;
u32 nr_addr, nr_size;
int len, error;
ranges = of_get_property(np, "ranges", &len);
if (!ranges) {
dev_err(ddata->dev, "missing ranges for %pOF\n", np);
return -ENOENT;
}
len /= sizeof(*ranges);
if (len < 3) {
dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
return -EINVAL;
}
error = of_property_read_u32(np, "#address-cells", &nr_addr);
if (error)
return -ENOENT;
error = of_property_read_u32(np, "#size-cells", &nr_size);
if (error)
return -ENOENT;
if (nr_addr != 1 || nr_size != 1) {
dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
return -EINVAL;
}
ranges++;
ddata->module_pa = of_translate_address(np, ranges++);
ddata->module_size = be32_to_cpup(ranges);
return 0;
}
/* Interconnect instances to probe before l4_per instances */
static struct resource early_bus_ranges[] = {
/* am3/4 l4_wkup */
{ .start = 0x44c00000, .end = 0x44c00000 + 0x300000, },
/* omap4/5 and dra7 l4_cfg */
{ .start = 0x4a000000, .end = 0x4a000000 + 0x300000, },
/* omap4 l4_wkup */
{ .start = 0x4a300000, .end = 0x4a300000 + 0x30000, },
/* omap5 and dra7 l4_wkup without dra7 dcan segment */
{ .start = 0x4ae00000, .end = 0x4ae00000 + 0x30000, },
};
static atomic_t sysc_defer = ATOMIC_INIT(10);
/**
* sysc_defer_non_critical - defer non_critical interconnect probing
* @ddata: device driver data
*
* We want to probe l4_cfg and l4_wkup interconnect instances before any
* l4_per instances as l4_per instances depend on resources on l4_cfg and
* l4_wkup interconnects.
*/
static int sysc_defer_non_critical(struct sysc *ddata)
{
struct resource *res;
int i;
if (!atomic_read(&sysc_defer))
return 0;
for (i = 0; i < ARRAY_SIZE(early_bus_ranges); i++) {
res = &early_bus_ranges[i];
if (ddata->module_pa >= res->start &&
ddata->module_pa <= res->end) {
atomic_set(&sysc_defer, 0);
return 0;
}
}
atomic_dec_if_positive(&sysc_defer);
return -EPROBE_DEFER;
}
static struct device_node *stdout_path;
static void sysc_init_stdout_path(struct sysc *ddata)
{
struct device_node *np = NULL;
const char *uart;
if (IS_ERR(stdout_path))
return;
if (stdout_path)
return;
np = of_find_node_by_path("/chosen");
if (!np)
goto err;
uart = of_get_property(np, "stdout-path", NULL);
if (!uart)
goto err;
np = of_find_node_by_path(uart);
if (!np)
goto err;
stdout_path = np;
return;
err:
stdout_path = ERR_PTR(-ENODEV);
}
static void sysc_check_quirk_stdout(struct sysc *ddata,
struct device_node *np)
{
sysc_init_stdout_path(ddata);
if (np != stdout_path)
return;
ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
SYSC_QUIRK_NO_RESET_ON_INIT;
}
/**
* sysc_check_one_child - check child configuration
* @ddata: device driver data
* @np: child device node
*
* Let's avoid messy situations where we have new interconnect target
* node but children have "ti,hwmods". These belong to the interconnect
* target node and are managed by this driver.
*/
static void sysc_check_one_child(struct sysc *ddata,
struct device_node *np)
{
const char *name;
name = of_get_property(np, "ti,hwmods", NULL);
if (name && !of_device_is_compatible(np, "ti,sysc"))
dev_warn(ddata->dev, "really a child ti,hwmods property?");
sysc_check_quirk_stdout(ddata, np);
sysc_parse_dts_quirks(ddata, np, true);
}
static void sysc_check_children(struct sysc *ddata)
{
struct device_node *child;
for_each_child_of_node(ddata->dev->of_node, child)
sysc_check_one_child(ddata, child);
}
/*
* So far only I2C uses 16-bit read access with clockactivity with revision
* in two registers with stride of 4. We can detect this based on the rev
* register size to configure things far enough to be able to properly read
* the revision register.
*/
static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res)
{
if (resource_size(res) == 8)
ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT;
}
/**
* sysc_parse_one - parses the interconnect target module registers
* @ddata: device driver data
* @reg: register to parse
*/
static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg)
{
struct resource *res;
const char *name;
switch (reg) {
case SYSC_REVISION:
case SYSC_SYSCONFIG:
case SYSC_SYSSTATUS:
name = reg_names[reg];
break;
default:
return -EINVAL;
}
res = platform_get_resource_byname(to_platform_device(ddata->dev),
IORESOURCE_MEM, name);
if (!res) {
ddata->offsets[reg] = -ENODEV;
return 0;
}
ddata->offsets[reg] = res->start - ddata->module_pa;
if (reg == SYSC_REVISION)
sysc_check_quirk_16bit(ddata, res);
return 0;
}
static int sysc_parse_registers(struct sysc *ddata)
{
int i, error;
for (i = 0; i < SYSC_MAX_REGS; i++) {
error = sysc_parse_one(ddata, i);
if (error)
return error;
}
return 0;
}
/**
* sysc_check_registers - check for misconfigured register overlaps
* @ddata: device driver data
*/
static int sysc_check_registers(struct sysc *ddata)
{
int i, j, nr_regs = 0, nr_matches = 0;
for (i = 0; i < SYSC_MAX_REGS; i++) {
if (ddata->offsets[i] < 0)
continue;
if (ddata->offsets[i] > (ddata->module_size - 4)) {
dev_err(ddata->dev, "register outside module range");
return -EINVAL;
}
for (j = 0; j < SYSC_MAX_REGS; j++) {
if (ddata->offsets[j] < 0)
continue;
if (ddata->offsets[i] == ddata->offsets[j])
nr_matches++;
}
nr_regs++;
}
if (nr_matches > nr_regs) {
dev_err(ddata->dev, "overlapping registers: (%i/%i)",
nr_regs, nr_matches);
return -EINVAL;
}
return 0;
}
/**
* sysc_ioremap - ioremap register space for the interconnect target module
* @ddata: device driver data
*
* Note that the interconnect target module registers can be anywhere
* within the interconnect target module range. For example, SGX has
* them at offset 0x1fc00 in the 32MB module address space. And cpsw
* has them at offset 0x1200 in the CPSW_WR child. Usually the
* the interconnect target module registers are at the beginning of
* the module range though.
*/
static int sysc_ioremap(struct sysc *ddata)
{
int size;
if (ddata->offsets[SYSC_REVISION] < 0 &&
ddata->offsets[SYSC_SYSCONFIG] < 0 &&
ddata->offsets[SYSC_SYSSTATUS] < 0) {
size = ddata->module_size;
} else {
size = max3(ddata->offsets[SYSC_REVISION],
ddata->offsets[SYSC_SYSCONFIG],
ddata->offsets[SYSC_SYSSTATUS]);
if (size < SZ_1K)
size = SZ_1K;
if ((size + sizeof(u32)) > ddata->module_size)
size = ddata->module_size;
}
ddata->module_va = devm_ioremap(ddata->dev,
ddata->module_pa,
size + sizeof(u32));
if (!ddata->module_va)
return -EIO;
return 0;
}
/**
* sysc_map_and_check_registers - ioremap and check device registers
* @ddata: device driver data
*/
static int sysc_map_and_check_registers(struct sysc *ddata)
{
struct device_node *np = ddata->dev->of_node;
int error;
error = sysc_parse_and_check_child_range(ddata);
if (error)
return error;
error = sysc_defer_non_critical(ddata);
if (error)
return error;
sysc_check_children(ddata);
if (!of_get_property(np, "reg", NULL))
return 0;
error = sysc_parse_registers(ddata);
if (error)
return error;
error = sysc_ioremap(ddata);
if (error)
return error;
error = sysc_check_registers(ddata);
if (error)
return error;
return 0;
}
/**
* sysc_show_rev - read and show interconnect target module revision
* @bufp: buffer to print the information to
* @ddata: device driver data
*/
static int sysc_show_rev(char *bufp, struct sysc *ddata)
{
int len;
if (ddata->offsets[SYSC_REVISION] < 0)
return sprintf(bufp, ":NA");
len = sprintf(bufp, ":%08x", ddata->revision);
return len;
}
static int sysc_show_reg(struct sysc *ddata,
char *bufp, enum sysc_registers reg)
{
if (ddata->offsets[reg] < 0)
return sprintf(bufp, ":NA");
return sprintf(bufp, ":%x", ddata->offsets[reg]);
}
static int sysc_show_name(char *bufp, struct sysc *ddata)
{
if (!ddata->name)
return 0;
return sprintf(bufp, ":%s", ddata->name);
}
/**
* sysc_show_registers - show information about interconnect target module
* @ddata: device driver data
*/
static void sysc_show_registers(struct sysc *ddata)
{
char buf[128];
char *bufp = buf;
int i;
for (i = 0; i < SYSC_MAX_REGS; i++)
bufp += sysc_show_reg(ddata, bufp, i);
bufp += sysc_show_rev(bufp, ddata);
bufp += sysc_show_name(bufp, ddata);
dev_dbg(ddata->dev, "%llx:%x%s\n",
ddata->module_pa, ddata->module_size,
buf);
}
/**
* sysc_write_sysconfig - handle sysconfig quirks for register write
* @ddata: device driver data
* @value: register value
*/
static void sysc_write_sysconfig(struct sysc *ddata, u32 value)
{
if (ddata->module_unlock_quirk)
ddata->module_unlock_quirk(ddata);
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], value);
if (ddata->module_lock_quirk)
ddata->module_lock_quirk(ddata);
}
#define SYSC_IDLE_MASK (SYSC_NR_IDLEMODES - 1)
#define SYSC_CLOCACT_ICK 2
/* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */
static int sysc_enable_module(struct device *dev)
{
struct sysc *ddata;
const struct sysc_regbits *regbits;
u32 reg, idlemodes, best_mode;
int error;
ddata = dev_get_drvdata(dev);
/*
* Some modules like DSS reset automatically on idle. Enable optional
* reset clocks and wait for OCP softreset to complete.
*/
if (ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_IN_RESET) {
error = sysc_enable_opt_clocks(ddata);
if (error) {
dev_err(ddata->dev,
"Optional clocks failed for enable: %i\n",
error);
return error;
}
}
/*
* Some modules like i2c and hdq1w have unusable reset status unless
* the module reset quirk is enabled. Skip status check on enable.
*/
if (!(ddata->cfg.quirks & SYSC_MODULE_QUIRK_ENA_RESETDONE)) {
error = sysc_wait_softreset(ddata);
if (error)
dev_warn(ddata->dev, "OCP softreset timed out\n");
}
if (ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_IN_RESET)
sysc_disable_opt_clocks(ddata);
/*
* Some subsystem private interconnects, like DSS top level module,
* need only the automatic OCP softreset handling with no sysconfig
* register bits to configure.
*/
if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
return 0;
regbits = ddata->cap->regbits;
reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
/*
* Set CLOCKACTIVITY, we only use it for ick. And we only configure it
* based on the SYSC_QUIRK_USE_CLOCKACT flag, not based on the hardware
* capabilities. See the old HWMOD_SET_DEFAULT_CLOCKACT flag.
*/
if (regbits->clkact_shift >= 0 &&
(ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT))
reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift;
/* Set SIDLE mode */
idlemodes = ddata->cfg.sidlemodes;
if (!idlemodes || regbits->sidle_shift < 0)
goto set_midle;
if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE |
SYSC_QUIRK_SWSUP_SIDLE_ACT)) {
best_mode = SYSC_IDLE_NO;
} else {
best_mode = fls(ddata->cfg.sidlemodes) - 1;
if (best_mode > SYSC_IDLE_MASK) {
dev_err(dev, "%s: invalid sidlemode\n", __func__);
return -EINVAL;
}
/* Set WAKEUP */
if (regbits->enwkup_shift >= 0 &&
ddata->cfg.sysc_val & BIT(regbits->enwkup_shift))
reg |= BIT(regbits->enwkup_shift);
}
reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
reg |= best_mode << regbits->sidle_shift;
sysc_write_sysconfig(ddata, reg);
set_midle:
/* Set MIDLE mode */
idlemodes = ddata->cfg.midlemodes;
if (!idlemodes || regbits->midle_shift < 0)
goto set_autoidle;
best_mode = fls(ddata->cfg.midlemodes) - 1;
if (best_mode > SYSC_IDLE_MASK) {
dev_err(dev, "%s: invalid midlemode\n", __func__);
error = -EINVAL;
goto save_context;
}
if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
best_mode = SYSC_IDLE_NO;
reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
reg |= best_mode << regbits->midle_shift;
sysc_write_sysconfig(ddata, reg);
set_autoidle:
/* Autoidle bit must enabled separately if available */
if (regbits->autoidle_shift >= 0 &&
ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) {
reg |= 1 << regbits->autoidle_shift;
sysc_write_sysconfig(ddata, reg);
}
error = 0;
save_context:
/* Save context and flush posted write */
ddata->sysconfig = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
if (ddata->module_enable_quirk)
ddata->module_enable_quirk(ddata);
return error;
}
static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode)
{
if (idlemodes & BIT(SYSC_IDLE_SMART_WKUP))
*best_mode = SYSC_IDLE_SMART_WKUP;
else if (idlemodes & BIT(SYSC_IDLE_SMART))
*best_mode = SYSC_IDLE_SMART;
else if (idlemodes & BIT(SYSC_IDLE_FORCE))
*best_mode = SYSC_IDLE_FORCE;
else
return -EINVAL;
return 0;
}
/* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */
static int sysc_disable_module(struct device *dev)
{
struct sysc *ddata;
const struct sysc_regbits *regbits;
u32 reg, idlemodes, best_mode;
int ret;
ddata = dev_get_drvdata(dev);
if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV)
return 0;
if (ddata->module_disable_quirk)
ddata->module_disable_quirk(ddata);
regbits = ddata->cap->regbits;
reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
/* Set MIDLE mode */
idlemodes = ddata->cfg.midlemodes;
if (!idlemodes || regbits->midle_shift < 0)
goto set_sidle;
ret = sysc_best_idle_mode(idlemodes, &best_mode);
if (ret) {
dev_err(dev, "%s: invalid midlemode\n", __func__);
return ret;
}
if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_MSTANDBY) ||
ddata->cfg.quirks & (SYSC_QUIRK_FORCE_MSTANDBY))
best_mode = SYSC_IDLE_FORCE;
reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
reg |= best_mode << regbits->midle_shift;
sysc_write_sysconfig(ddata, reg);
set_sidle:
/* Set SIDLE mode */
idlemodes = ddata->cfg.sidlemodes;
if (!idlemodes || regbits->sidle_shift < 0) {
ret = 0;
goto save_context;
}
if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) {
best_mode = SYSC_IDLE_FORCE;
} else {
ret = sysc_best_idle_mode(idlemodes, &best_mode);
if (ret) {
dev_err(dev, "%s: invalid sidlemode\n", __func__);
ret = -EINVAL;
goto save_context;
}
}
reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift);
reg |= best_mode << regbits->sidle_shift;
if (regbits->autoidle_shift >= 0 &&
ddata->cfg.sysc_val & BIT(regbits->autoidle_shift))
reg |= 1 << regbits->autoidle_shift;
sysc_write_sysconfig(ddata, reg);
ret = 0;
save_context:
/* Save context and flush posted write */
ddata->sysconfig = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
return ret;
}
static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev,
struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata;
int error;
pdata = dev_get_platdata(ddata->dev);
if (!pdata)
return 0;
if (!pdata->idle_module)
return -ENODEV;
error = pdata->idle_module(dev, &ddata->cookie);
if (error)
dev_err(dev, "%s: could not idle: %i\n",
__func__, error);
reset_control_assert(ddata->rsts);
return 0;
}
static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev,
struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata;
int error;
pdata = dev_get_platdata(ddata->dev);
if (!pdata)
return 0;
if (!pdata->enable_module)
return -ENODEV;
error = pdata->enable_module(dev, &ddata->cookie);
if (error)
dev_err(dev, "%s: could not enable: %i\n",
__func__, error);
reset_control_deassert(ddata->rsts);
return 0;
}
static int __maybe_unused sysc_runtime_suspend(struct device *dev)
{
struct sysc *ddata;
int error = 0;
ddata = dev_get_drvdata(dev);
if (!ddata->enabled)
return 0;
sysc_clkdm_deny_idle(ddata);
if (ddata->legacy_mode) {
error = sysc_runtime_suspend_legacy(dev, ddata);
if (error)
goto err_allow_idle;
} else {
error = sysc_disable_module(dev);
if (error)
goto err_allow_idle;
}
sysc_disable_main_clocks(ddata);
if (sysc_opt_clks_needed(ddata))
sysc_disable_opt_clocks(ddata);
ddata->enabled = false;
err_allow_idle:
sysc_clkdm_allow_idle(ddata);
reset_control_assert(ddata->rsts);
return error;
}
static int __maybe_unused sysc_runtime_resume(struct device *dev)
{
struct sysc *ddata;
int error = 0;
ddata = dev_get_drvdata(dev);
if (ddata->enabled)
return 0;
sysc_clkdm_deny_idle(ddata);
if (sysc_opt_clks_needed(ddata)) {
error = sysc_enable_opt_clocks(ddata);
if (error)
goto err_allow_idle;
}
error = sysc_enable_main_clocks(ddata);
if (error)
goto err_opt_clocks;
reset_control_deassert(ddata->rsts);
if (ddata->legacy_mode) {
error = sysc_runtime_resume_legacy(dev, ddata);
if (error)
goto err_main_clocks;
} else {
error = sysc_enable_module(dev);
if (error)
goto err_main_clocks;
}
ddata->enabled = true;
sysc_clkdm_allow_idle(ddata);
return 0;
err_main_clocks:
sysc_disable_main_clocks(ddata);
err_opt_clocks:
if (sysc_opt_clks_needed(ddata))
sysc_disable_opt_clocks(ddata);
err_allow_idle:
sysc_clkdm_allow_idle(ddata);
return error;
}
/*
* Checks if device context was lost. Assumes the sysconfig register value
* after lost context is different from the configured value. Only works for
* enabled devices.
*
* Eventually we may want to also add support to using the context lost
* registers that some SoCs have.
*/
static int sysc_check_context(struct sysc *ddata)
{
u32 reg;
if (!ddata->enabled)
return -ENODATA;
reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
if (reg == ddata->sysconfig)
return 0;
return -EACCES;
}
static int sysc_reinit_module(struct sysc *ddata, bool leave_enabled)
{
struct device *dev = ddata->dev;
int error;
if (ddata->enabled) {
/* Nothing to do if enabled and context not lost */
error = sysc_check_context(ddata);
if (!error)
return 0;
/* Disable target module if it is enabled */
error = sysc_runtime_suspend(dev);
if (error)
dev_warn(dev, "reinit suspend failed: %i\n", error);
}
/* Enable target module */
error = sysc_runtime_resume(dev);
if (error)
dev_warn(dev, "reinit resume failed: %i\n", error);
/* Some modules like am335x gpmc need reset and restore of sysconfig */
if (ddata->cfg.quirks & SYSC_QUIRK_RESET_ON_CTX_LOST) {
error = sysc_reset(ddata);
if (error)
dev_warn(dev, "reinit reset failed: %i\n", error);
sysc_write_sysconfig(ddata, ddata->sysconfig);
}
if (leave_enabled)
return error;
/* Disable target module if no leave_enabled was set */
error = sysc_runtime_suspend(dev);
if (error)
dev_warn(dev, "reinit suspend failed: %i\n", error);
return error;
}
static int __maybe_unused sysc_noirq_suspend(struct device *dev)
{
struct sysc *ddata;
ddata = dev_get_drvdata(dev);
if (ddata->cfg.quirks &
(SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
return 0;
if (!ddata->enabled)
return 0;
ddata->needs_resume = 1;
return sysc_runtime_suspend(dev);
}
static int __maybe_unused sysc_noirq_resume(struct device *dev)
{
struct sysc *ddata;
int error = 0;
ddata = dev_get_drvdata(dev);
if (ddata->cfg.quirks &
(SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
return 0;
if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_RESUME) {
error = sysc_reinit_module(ddata, ddata->needs_resume);
if (error)
dev_warn(dev, "noirq_resume failed: %i\n", error);
} else if (ddata->needs_resume) {
error = sysc_runtime_resume(dev);
if (error)
dev_warn(dev, "noirq_resume failed: %i\n", error);
}
ddata->needs_resume = 0;
return error;
}
static const struct dev_pm_ops sysc_pm_ops = {
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
sysc_runtime_resume,
NULL)
};
/* Module revision register based quirks */
struct sysc_revision_quirk {
const char *name;
u32 base;
int rev_offset;
int sysc_offset;
int syss_offset;
u32 revision;
u32 revision_mask;
u32 quirks;
};
#define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \
optrev_val, optrevmask, optquirkmask) \
{ \
.name = (optname), \
.base = (optbase), \
.rev_offset = (optrev), \
.sysc_offset = (optsysc), \
.syss_offset = (optsyss), \
.revision = (optrev_val), \
.revision_mask = (optrevmask), \
.quirks = (optquirkmask), \
}
static const struct sysc_revision_quirk sysc_revision_quirks[] = {
/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
/* Uarts on omap4 and later */
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE),
/* Quirks that need to be set based on the module address */
SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -ENODEV, 0x50000800, 0xffffffff,
SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT |
SYSC_QUIRK_SWSUP_SIDLE),
/* Quirks that need to be set based on detected module */
SYSC_QUIRK("aess", 0, 0, 0x10, -ENODEV, 0x40000000, 0xffffffff,
SYSC_MODULE_QUIRK_AESS),
SYSC_QUIRK("dcan", 0x48480000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
SYSC_QUIRK_CLKDM_NOAUTO),
SYSC_QUIRK("dss", 0x4832a000, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000040, 0xffffffff,
SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000061, 0xffffffff,
SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
SYSC_QUIRK("dwc3", 0x48880000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
SYSC_QUIRK_CLKDM_NOAUTO),
SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
SYSC_QUIRK_CLKDM_NOAUTO),
SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff,
SYSC_QUIRK_OPT_CLKS_IN_RESET),
SYSC_QUIRK("gpmc", 0, 0, 0x10, 0x14, 0x00000060, 0xffffffff,
SYSC_QUIRK_REINIT_ON_CTX_LOST | SYSC_QUIRK_RESET_ON_CTX_LOST |
SYSC_QUIRK_GPMC_DEBUG),
SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50030200, 0xffffffff,
SYSC_QUIRK_OPT_CLKS_NEEDED),
SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
SYSC_MODULE_QUIRK_HDQ1W | SYSC_MODULE_QUIRK_ENA_RESETDONE),
SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,
SYSC_MODULE_QUIRK_HDQ1W | SYSC_MODULE_QUIRK_ENA_RESETDONE),
SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000036, 0x000000ff,
SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x0000003c, 0x000000ff,
SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000040, 0x000000ff,
SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0,
SYSC_MODULE_QUIRK_I2C | SYSC_MODULE_QUIRK_ENA_RESETDONE),
SYSC_QUIRK("gpu", 0x50000000, 0x14, -ENODEV, -ENODEV, 0x00010201, 0xffffffff, 0),
SYSC_QUIRK("gpu", 0x50000000, 0xfe00, 0xfe10, -ENODEV, 0x40000000 , 0xffffffff,
SYSC_MODULE_QUIRK_SGX),
SYSC_QUIRK("lcdc", 0, 0, 0x54, -ENODEV, 0x4f201000, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("mcasp", 0, 0, 0x4, -ENODEV, 0x44306302, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE),
SYSC_QUIRK("rtc", 0, 0x74, 0x78, -ENODEV, 0x4eb01908, 0xffff00f0,
SYSC_MODULE_QUIRK_RTC_UNLOCK),
SYSC_QUIRK("tptc", 0, 0, 0x10, -ENODEV, 0x40006c00, 0xffffefff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("tptc", 0, 0, -ENODEV, -ENODEV, 0x40007c00, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("sata", 0, 0xfc, 0x1100, -ENODEV, 0x5e412000, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -ENODEV, 0x50700101, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
SYSC_MODULE_QUIRK_OTG),
SYSC_QUIRK("usb_otg_hs", 0, 0, 0x10, -ENODEV, 0x4ea2080d, 0xffffffff,
SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY |
SYSC_QUIRK_REINIT_ON_CTX_LOST),
SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
SYSC_MODULE_QUIRK_WDT),
/* PRUSS on am3, am4 and am5 */
SYSC_QUIRK("pruss", 0, 0x26000, 0x26004, -ENODEV, 0x47000000, 0xff000000,
SYSC_MODULE_QUIRK_PRUSS),
/* Watchdog on am3 and am4 */
SYSC_QUIRK("wdt", 0x44e35000, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
SYSC_MODULE_QUIRK_WDT | SYSC_QUIRK_SWSUP_SIDLE),
#ifdef DEBUG
SYSC_QUIRK("adc", 0, 0, 0x10, -ENODEV, 0x47300001, 0xffffffff, 0),
SYSC_QUIRK("atl", 0, 0, -ENODEV, -ENODEV, 0x0a070100, 0xffffffff, 0),
SYSC_QUIRK("cm", 0, 0, -ENODEV, -ENODEV, 0x40000301, 0xffffffff, 0),
SYSC_QUIRK("control", 0, 0, 0x10, -ENODEV, 0x40000900, 0xffffffff, 0),
SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902,
0xffff00f0, 0),
SYSC_QUIRK("dcan", 0, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff, 0),
SYSC_QUIRK("dcan", 0, 0x20, -ENODEV, -ENODEV, 0x4edb1902, 0xffffffff, 0),
SYSC_QUIRK("dispc", 0x4832a400, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0),
SYSC_QUIRK("dispc", 0x58001000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0),
SYSC_QUIRK("dispc", 0x58001000, 0, 0x10, 0x14, 0x00000051, 0xffffffff, 0),
SYSC_QUIRK("dmic", 0, 0, 0x10, -ENODEV, 0x50010000, 0xffffffff, 0),
SYSC_QUIRK("dsi", 0x58004000, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0),
SYSC_QUIRK("dsi", 0x58005000, 0, 0x10, 0x14, 0x00000030, 0xffffffff, 0),
SYSC_QUIRK("dsi", 0x58005000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0),
SYSC_QUIRK("dsi", 0x58009000, 0, 0x10, 0x14, 0x00000040, 0xffffffff, 0),
SYSC_QUIRK("dwc3", 0, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff, 0),
SYSC_QUIRK("d2d", 0x4a0b6000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
SYSC_QUIRK("d2d", 0x4a0cd000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
SYSC_QUIRK("elm", 0x48080000, 0, 0x10, 0x14, 0x00000020, 0xffffffff, 0),
SYSC_QUIRK("emif", 0, 0, -ENODEV, -ENODEV, 0x40441403, 0xffff0fff, 0),
SYSC_QUIRK("emif", 0, 0, -ENODEV, -ENODEV, 0x50440500, 0xffffffff, 0),
SYSC_QUIRK("epwmss", 0, 0, 0x4, -ENODEV, 0x47400001, 0xffffffff, 0),
SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -ENODEV, 0, 0, 0),
SYSC_QUIRK("gpu", 0, 0xfe00, 0xfe10, -ENODEV, 0x40000000 , 0xffffffff, 0),
SYSC_QUIRK("hdmi", 0, 0, 0x10, -ENODEV, 0x50031d00, 0xffffffff, 0),
SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
SYSC_QUIRK("iss", 0, 0, 0x10, -ENODEV, 0x40000101, 0xffffffff, 0),
SYSC_QUIRK("keypad", 0x4a31c000, 0, 0x10, 0x14, 0x00000020, 0xffffffff, 0),
SYSC_QUIRK("mcasp", 0, 0, 0x4, -ENODEV, 0x44307b02, 0xffffffff, 0),
SYSC_QUIRK("mcbsp", 0, -ENODEV, 0x8c, -ENODEV, 0, 0, 0),
SYSC_QUIRK("mcspi", 0, 0, 0x10, -ENODEV, 0x40300a0b, 0xffff00ff, 0),
SYSC_QUIRK("mcspi", 0, 0, 0x110, 0x114, 0x40300a0b, 0xffffffff, 0),
SYSC_QUIRK("mailbox", 0, 0, 0x10, -ENODEV, 0x00000400, 0xffffffff, 0),
SYSC_QUIRK("m3", 0, 0, -ENODEV, -ENODEV, 0x5f580105, 0x0fff0f00, 0),
SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xfffffff0, 0),
SYSC_QUIRK("ocp2scp", 0, 0, -ENODEV, -ENODEV, 0x50060007, 0xffffffff, 0),
SYSC_QUIRK("padconf", 0, 0, 0x10, -ENODEV, 0x4fff0800, 0xffffffff, 0),
SYSC_QUIRK("padconf", 0, 0, -ENODEV, -ENODEV, 0x40001100, 0xffffffff, 0),
SYSC_QUIRK("pcie", 0x51000000, -ENODEV, -ENODEV, -ENODEV, 0, 0, 0),
SYSC_QUIRK("pcie", 0x51800000, -ENODEV, -ENODEV, -ENODEV, 0, 0, 0),
SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x40000100, 0xffffffff, 0),
SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x00004102, 0xffffffff, 0),
SYSC_QUIRK("prcm", 0, 0, -ENODEV, -ENODEV, 0x40000400, 0xffffffff, 0),
SYSC_QUIRK("rfbi", 0x4832a800, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
SYSC_QUIRK("rfbi", 0x58002000, 0, 0x10, 0x14, 0x00000010, 0xffffffff, 0),
SYSC_QUIRK("scm", 0, 0, 0x10, -ENODEV, 0x40000900, 0xffffffff, 0),
SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x4e8b0100, 0xffffffff, 0),
SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x4f000100, 0xffffffff, 0),
SYSC_QUIRK("scm", 0, 0, -ENODEV, -ENODEV, 0x40000900, 0xffffffff, 0),
SYSC_QUIRK("scrm", 0, 0, -ENODEV, -ENODEV, 0x00000010, 0xffffffff, 0),
SYSC_QUIRK("sdio", 0, 0, 0x10, -ENODEV, 0x40202301, 0xffff0ff0, 0),
SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0),
SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0),
SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff, 0),
SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40000902, 0xffffffff, 0),
SYSC_QUIRK("slimbus", 0, 0, 0x10, -ENODEV, 0x40002903, 0xffffffff, 0),
SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x24, -ENODEV, 0x00000000, 0xffffffff, 0),
SYSC_QUIRK("smartreflex", 0, -ENODEV, 0x38, -ENODEV, 0x00000000, 0xffffffff, 0),
SYSC_QUIRK("spinlock", 0, 0, 0x10, -ENODEV, 0x50020000, 0xffffffff, 0),
SYSC_QUIRK("rng", 0, 0x1fe0, 0x1fe4, -ENODEV, 0x00000020, 0xffffffff, 0),
SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000013, 0xffffffff, 0),
SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff, 0),
/* Some timers on omap4 and later */
SYSC_QUIRK("timer", 0, 0, 0x10, -ENODEV, 0x50002100, 0xffffffff, 0),
SYSC_QUIRK("timer", 0, 0, 0x10, -ENODEV, 0x4fff1301, 0xffff00ff, 0),
SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000040, 0xffffffff, 0),
SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000011, 0xffffffff, 0),
SYSC_QUIRK("timer32k", 0, 0, 0x4, -ENODEV, 0x00000060, 0xffffffff, 0),
SYSC_QUIRK("tpcc", 0, 0, -ENODEV, -ENODEV, 0x40014c00, 0xffffffff, 0),
SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0),
SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0),
SYSC_QUIRK("venc", 0x58003000, 0, -ENODEV, -ENODEV, 0x00000002, 0xffffffff, 0),
SYSC_QUIRK("vfpe", 0, 0, 0x104, -ENODEV, 0x4d001200, 0xffffffff, 0),
#endif
};
/*
* Early quirks based on module base and register offsets only that are
* needed before the module revision can be read
*/
static void sysc_init_early_quirks(struct sysc *ddata)
{
const struct sysc_revision_quirk *q;
int i;
for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
q = &sysc_revision_quirks[i];
if (!q->base)
continue;
if (q->base != ddata->module_pa)
continue;
if (q->rev_offset != ddata->offsets[SYSC_REVISION])
continue;
if (q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
continue;
if (q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
continue;
ddata->name = q->name;
ddata->cfg.quirks |= q->quirks;
}
}
/* Quirks that also consider the revision register value */
static void sysc_init_revision_quirks(struct sysc *ddata)
{
const struct sysc_revision_quirk *q;
int i;
for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
q = &sysc_revision_quirks[i];
if (q->base && q->base != ddata->module_pa)
continue;
if (q->rev_offset != ddata->offsets[SYSC_REVISION])
continue;
if (q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
continue;
if (q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
continue;
if (q->revision == ddata->revision ||
(q->revision & q->revision_mask) ==
(ddata->revision & q->revision_mask)) {
ddata->name = q->name;
ddata->cfg.quirks |= q->quirks;
}
}
}
/*
* DSS needs dispc outputs disabled to reset modules. Returns mask of
* enabled DSS interrupts. Eventually we may be able to do this on
* dispc init rather than top-level DSS init.
*/
static u32 sysc_quirk_dispc(struct sysc *ddata, int dispc_offset,
bool disable)
{
bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false;
const int lcd_en_mask = BIT(0), digit_en_mask = BIT(1);
int manager_count;
bool framedonetv_irq = true;
u32 val, irq_mask = 0;
switch (sysc_soc->soc) {
case SOC_2420 ... SOC_3630:
manager_count = 2;
framedonetv_irq = false;
break;
case SOC_4430 ... SOC_4470:
manager_count = 3;
break;
case SOC_5430:
case SOC_DRA7:
manager_count = 4;
break;
case SOC_AM4:
manager_count = 1;
framedonetv_irq = false;
break;
case SOC_UNKNOWN:
default:
return 0;
}
/* Remap the whole module range to be able to reset dispc outputs */
devm_iounmap(ddata->dev, ddata->module_va);
ddata->module_va = devm_ioremap(ddata->dev,
ddata->module_pa,
ddata->module_size);
if (!ddata->module_va)
return -EIO;
/* DISP_CONTROL */
val = sysc_read(ddata, dispc_offset + 0x40);
lcd_en = val & lcd_en_mask;
digit_en = val & digit_en_mask;
if (lcd_en)
irq_mask |= BIT(0); /* FRAMEDONE */
if (digit_en) {
if (framedonetv_irq)
irq_mask |= BIT(24); /* FRAMEDONETV */
else
irq_mask |= BIT(2) | BIT(3); /* EVSYNC bits */
}
if (disable & (lcd_en | digit_en))
sysc_write(ddata, dispc_offset + 0x40,
val & ~(lcd_en_mask | digit_en_mask));
if (manager_count <= 2)
return irq_mask;
/* DISPC_CONTROL2 */
val = sysc_read(ddata, dispc_offset + 0x238);
lcd2_en = val & lcd_en_mask;
if (lcd2_en)
irq_mask |= BIT(22); /* FRAMEDONE2 */
if (disable && lcd2_en)
sysc_write(ddata, dispc_offset + 0x238,
val & ~lcd_en_mask);
if (manager_count <= 3)
return irq_mask;
/* DISPC_CONTROL3 */
val = sysc_read(ddata, dispc_offset + 0x848);
lcd3_en = val & lcd_en_mask;
if (lcd3_en)
irq_mask |= BIT(30); /* FRAMEDONE3 */
if (disable && lcd3_en)
sysc_write(ddata, dispc_offset + 0x848,
val & ~lcd_en_mask);
return irq_mask;
}
/* DSS needs child outputs disabled and SDI registers cleared for reset */
static void sysc_pre_reset_quirk_dss(struct sysc *ddata)
{
const int dispc_offset = 0x1000;
int error;
u32 irq_mask, val;
/* Get enabled outputs */
irq_mask = sysc_quirk_dispc(ddata, dispc_offset, false);
if (!irq_mask)
return;
/* Clear IRQSTATUS */
sysc_write(ddata, dispc_offset + 0x18, irq_mask);
/* Disable outputs */
val = sysc_quirk_dispc(ddata, dispc_offset, true);
/* Poll IRQSTATUS */
error = readl_poll_timeout(ddata->module_va + dispc_offset + 0x18,
val, val != irq_mask, 100, 50);
if (error)
dev_warn(ddata->dev, "%s: timed out %08x !+ %08x\n",
__func__, val, irq_mask);
if (sysc_soc->soc == SOC_3430) {
/* Clear DSS_SDI_CONTROL */
sysc_write(ddata, 0x44, 0);
/* Clear DSS_PLL_CONTROL */
sysc_write(ddata, 0x48, 0);
}
/* Clear DSS_CONTROL to switch DSS clock sources to PRCM if not */
sysc_write(ddata, 0x40, 0);
}
/* 1-wire needs module's internal clocks enabled for reset */
static void sysc_pre_reset_quirk_hdq1w(struct sysc *ddata)
{
int offset = 0x0c; /* HDQ_CTRL_STATUS */
u16 val;
val = sysc_read(ddata, offset);
val |= BIT(5);
sysc_write(ddata, offset, val);
}
/* AESS (Audio Engine SubSystem) needs autogating set after enable */
static void sysc_module_enable_quirk_aess(struct sysc *ddata)
{
int offset = 0x7c; /* AESS_AUTO_GATING_ENABLE */
sysc_write(ddata, offset, 1);
}
/* I2C needs to be disabled for reset */
static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable)
{
int offset;
u16 val;
/* I2C_CON, omap2/3 is different from omap4 and later */
if ((ddata->revision & 0xffffff00) == 0x001f0000)
offset = 0x24;
else
offset = 0xa4;
/* I2C_EN */
val = sysc_read(ddata, offset);
if (enable)
val |= BIT(15);
else
val &= ~BIT(15);
sysc_write(ddata, offset, val);
}
static void sysc_pre_reset_quirk_i2c(struct sysc *ddata)
{
sysc_clk_quirk_i2c(ddata, false);
}
static void sysc_post_reset_quirk_i2c(struct sysc *ddata)
{
sysc_clk_quirk_i2c(ddata, true);
}
/* RTC on am3 and 4 needs to be unlocked and locked for sysconfig */
static void sysc_quirk_rtc(struct sysc *ddata, bool lock)
{
u32 val, kick0_val = 0, kick1_val = 0;
unsigned long flags;
int error;
if (!lock) {
kick0_val = 0x83e70b13;
kick1_val = 0x95a4f1e0;
}
local_irq_save(flags);
/* RTC_STATUS BUSY bit may stay active for 1/32768 seconds (~30 usec) */
error = readl_poll_timeout_atomic(ddata->module_va + 0x44, val,
!(val & BIT(0)), 100, 50);
if (error)
dev_warn(ddata->dev, "rtc busy timeout\n");
/* Now we have ~15 microseconds to read/write various registers */
sysc_write(ddata, 0x6c, kick0_val);
sysc_write(ddata, 0x70, kick1_val);
local_irq_restore(flags);
}
static void sysc_module_unlock_quirk_rtc(struct sysc *ddata)
{
sysc_quirk_rtc(ddata, false);
}
static void sysc_module_lock_quirk_rtc(struct sysc *ddata)
{
sysc_quirk_rtc(ddata, true);
}
/* OTG omap2430 glue layer up to omap4 needs OTG_FORCESTDBY configured */
static void sysc_module_enable_quirk_otg(struct sysc *ddata)
{
int offset = 0x414; /* OTG_FORCESTDBY */
sysc_write(ddata, offset, 0);
}
static void sysc_module_disable_quirk_otg(struct sysc *ddata)
{
int offset = 0x414; /* OTG_FORCESTDBY */
u32 val = BIT(0); /* ENABLEFORCE */
sysc_write(ddata, offset, val);
}
/* 36xx SGX needs a quirk for to bypass OCP IPG interrupt logic */
static void sysc_module_enable_quirk_sgx(struct sysc *ddata)
{
int offset = 0xff08; /* OCP_DEBUG_CONFIG */
u32 val = BIT(31); /* THALIA_INT_BYPASS */
sysc_write(ddata, offset, val);
}
/* Watchdog timer needs a disable sequence after reset */
static void sysc_reset_done_quirk_wdt(struct sysc *ddata)
{
int wps, spr, error;
u32 val;
wps = 0x34;
spr = 0x48;
sysc_write(ddata, spr, 0xaaaa);
error = readl_poll_timeout(ddata->module_va + wps, val,
!(val & 0x10), 100,
MAX_MODULE_SOFTRESET_WAIT);
if (error)
dev_warn(ddata->dev, "wdt disable step1 failed\n");
sysc_write(ddata, spr, 0x5555);
error = readl_poll_timeout(ddata->module_va + wps, val,
!(val & 0x10), 100,
MAX_MODULE_SOFTRESET_WAIT);
if (error)
dev_warn(ddata->dev, "wdt disable step2 failed\n");
}
/* PRUSS needs to set MSTANDBY_INIT inorder to idle properly */
static void sysc_module_disable_quirk_pruss(struct sysc *ddata)
{
u32 reg;
reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]);
reg |= SYSC_PRUSS_STANDBY_INIT;
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
}
static void sysc_init_module_quirks(struct sysc *ddata)
{
if (ddata->legacy_mode || !ddata->name)
return;
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_HDQ1W) {
ddata->pre_reset_quirk = sysc_pre_reset_quirk_hdq1w;
return;
}
#ifdef CONFIG_OMAP_GPMC_DEBUG
if (ddata->cfg.quirks & SYSC_QUIRK_GPMC_DEBUG) {
ddata->cfg.quirks |= SYSC_QUIRK_NO_RESET_ON_INIT;
return;
}
#endif
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_I2C) {
ddata->pre_reset_quirk = sysc_pre_reset_quirk_i2c;
ddata->post_reset_quirk = sysc_post_reset_quirk_i2c;
return;
}
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_AESS)
ddata->module_enable_quirk = sysc_module_enable_quirk_aess;
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_DSS_RESET)
ddata->pre_reset_quirk = sysc_pre_reset_quirk_dss;
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_RTC_UNLOCK) {
ddata->module_unlock_quirk = sysc_module_unlock_quirk_rtc;
ddata->module_lock_quirk = sysc_module_lock_quirk_rtc;
return;
}
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_OTG) {
ddata->module_enable_quirk = sysc_module_enable_quirk_otg;
ddata->module_disable_quirk = sysc_module_disable_quirk_otg;
}
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX)
ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT) {
ddata->reset_done_quirk = sysc_reset_done_quirk_wdt;
ddata->module_disable_quirk = sysc_reset_done_quirk_wdt;
}
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_PRUSS)
ddata->module_disable_quirk = sysc_module_disable_quirk_pruss;
}
static int sysc_clockdomain_init(struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
struct clk *fck = NULL, *ick = NULL;
int error;
if (!pdata || !pdata->init_clockdomain)
return 0;
switch (ddata->nr_clocks) {
case 2:
ick = ddata->clocks[SYSC_ICK];
fallthrough;
case 1:
fck = ddata->clocks[SYSC_FCK];
break;
case 0:
return 0;
}
error = pdata->init_clockdomain(ddata->dev, fck, ick, &ddata->cookie);
if (!error || error == -ENODEV)
return 0;
return error;
}
/*
* Note that pdata->init_module() typically does a reset first. After
* pdata->init_module() is done, PM runtime can be used for the interconnect
* target module.
*/
static int sysc_legacy_init(struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
int error;
if (!pdata || !pdata->init_module)
return 0;
error = pdata->init_module(ddata->dev, ddata->mdata, &ddata->cookie);
if (error == -EEXIST)
error = 0;
return error;
}
/*
* Note that the caller must ensure the interconnect target module is enabled
* before calling reset. Otherwise reset will not complete.
*/
static int sysc_reset(struct sysc *ddata)
{
int sysc_offset, sysc_val, error;
u32 sysc_mask;
sysc_offset = ddata->offsets[SYSC_SYSCONFIG];
if (ddata->legacy_mode ||
ddata->cap->regbits->srst_shift < 0 ||
ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
return 0;
sysc_mask = BIT(ddata->cap->regbits->srst_shift);
if (ddata->pre_reset_quirk)
ddata->pre_reset_quirk(ddata);
if (sysc_offset >= 0) {
sysc_val = sysc_read_sysconfig(ddata);
sysc_val |= sysc_mask;
sysc_write(ddata, sysc_offset, sysc_val);
}
if (ddata->cfg.srst_udelay)
usleep_range(ddata->cfg.srst_udelay,
ddata->cfg.srst_udelay * 2);
if (ddata->post_reset_quirk)
ddata->post_reset_quirk(ddata);
error = sysc_wait_softreset(ddata);
if (error)
dev_warn(ddata->dev, "OCP softreset timed out\n");
if (ddata->reset_done_quirk)
ddata->reset_done_quirk(ddata);
return error;
}
/*
* At this point the module is configured enough to read the revision but
* module may not be completely configured yet to use PM runtime. Enable
* all clocks directly during init to configure the quirks needed for PM
* runtime based on the revision register.
*/
static int sysc_init_module(struct sysc *ddata)
{
bool rstctrl_deasserted = false;
int error = 0;
error = sysc_clockdomain_init(ddata);
if (error)
return error;
sysc_clkdm_deny_idle(ddata);
/*
* Always enable clocks. The bootloader may or may not have enabled
* the related clocks.
*/
error = sysc_enable_opt_clocks(ddata);
if (error)
return error;
error = sysc_enable_main_clocks(ddata);
if (error)
goto err_opt_clocks;
if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) {
error = reset_control_deassert(ddata->rsts);
if (error)
goto err_main_clocks;
rstctrl_deasserted = true;
}
ddata->revision = sysc_read_revision(ddata);
sysc_init_revision_quirks(ddata);
sysc_init_module_quirks(ddata);
if (ddata->legacy_mode) {
error = sysc_legacy_init(ddata);
if (error)
goto err_main_clocks;
}
if (!ddata->legacy_mode) {
error = sysc_enable_module(ddata->dev);
if (error)
goto err_main_clocks;
}
error = sysc_reset(ddata);
if (error)
dev_err(ddata->dev, "Reset failed with %d\n", error);
if (error && !ddata->legacy_mode)
sysc_disable_module(ddata->dev);
err_main_clocks:
if (error)
sysc_disable_main_clocks(ddata);
err_opt_clocks:
/* No re-enable of clockdomain autoidle to prevent module autoidle */
if (error) {
sysc_disable_opt_clocks(ddata);
sysc_clkdm_allow_idle(ddata);
}
if (error && rstctrl_deasserted &&
!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT))
reset_control_assert(ddata->rsts);
return error;
}
static int sysc_init_sysc_mask(struct sysc *ddata)
{
struct device_node *np = ddata->dev->of_node;
int error;
u32 val;
error = of_property_read_u32(np, "ti,sysc-mask", &val);
if (error)
return 0;
ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
return 0;
}
static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
const char *name)
{
struct device_node *np = ddata->dev->of_node;
struct property *prop;
const __be32 *p;
u32 val;
of_property_for_each_u32(np, name, prop, p, val) {
if (val >= SYSC_NR_IDLEMODES) {
dev_err(ddata->dev, "invalid idlemode: %i\n", val);
return -EINVAL;
}
*idlemodes |= (1 << val);
}
return 0;
}
static int sysc_init_idlemodes(struct sysc *ddata)
{
int error;
error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes,
"ti,sysc-midle");
if (error)
return error;
error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes,
"ti,sysc-sidle");
if (error)
return error;
return 0;
}
/*
* Only some devices on omap4 and later have SYSCONFIG reset done
* bit. We can detect this if there is no SYSSTATUS at all, or the
* SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers
* have multiple bits for the child devices like OHCI and EHCI.
* Depends on SYSC being parsed first.
*/
static int sysc_init_syss_mask(struct sysc *ddata)
{
struct device_node *np = ddata->dev->of_node;
int error;
u32 val;
error = of_property_read_u32(np, "ti,syss-mask", &val);
if (error) {
if ((ddata->cap->type == TI_SYSC_OMAP4 ||
ddata->cap->type == TI_SYSC_OMAP4_TIMER) &&
(ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
return 0;
}
if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
ddata->cfg.syss_mask = val;
return 0;
}
/*
* Many child device drivers need to have fck and opt clocks available
* to get the clock rate for device internal configuration etc.
*/
static int sysc_child_add_named_clock(struct sysc *ddata,
struct device *child,
const char *name)
{
struct clk *clk;
struct clk_lookup *l;
int error = 0;
if (!name)
return 0;
clk = clk_get(child, name);
if (!IS_ERR(clk)) {
error = -EEXIST;
goto put_clk;
}
clk = clk_get(ddata->dev, name);
if (IS_ERR(clk))
return -ENODEV;
l = clkdev_create(clk, name, dev_name(child));
if (!l)
error = -ENOMEM;
put_clk:
clk_put(clk);
return error;
}
static int sysc_child_add_clocks(struct sysc *ddata,
struct device *child)
{
int i, error;
for (i = 0; i < ddata->nr_clocks; i++) {
error = sysc_child_add_named_clock(ddata,
child,
ddata->clock_roles[i]);
if (error && error != -EEXIST) {
dev_err(ddata->dev, "could not add child clock %s: %i\n",
ddata->clock_roles[i], error);
return error;
}
}
return 0;
}
static struct device_type sysc_device_type = {
};
static struct sysc *sysc_child_to_parent(struct device *dev)
{
struct device *parent = dev->parent;
if (!parent || parent->type != &sysc_device_type)
return NULL;
return dev_get_drvdata(parent);
}
static int __maybe_unused sysc_child_runtime_suspend(struct device *dev)
{
struct sysc *ddata;
int error;
ddata = sysc_child_to_parent(dev);
error = pm_generic_runtime_suspend(dev);
if (error)
return error;
if (!ddata->enabled)
return 0;
return sysc_runtime_suspend(ddata->dev);
}
static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
{
struct sysc *ddata;
int error;
ddata = sysc_child_to_parent(dev);
if (!ddata->enabled) {
error = sysc_runtime_resume(ddata->dev);
if (error < 0)
dev_err(ddata->dev,
"%s error: %i\n", __func__, error);
}
return pm_generic_runtime_resume(dev);
}
#ifdef CONFIG_PM_SLEEP
static int sysc_child_suspend_noirq(struct device *dev)
{
struct sysc *ddata;
int error;
ddata = sysc_child_to_parent(dev);
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
error = pm_generic_suspend_noirq(dev);
if (error) {
dev_err(dev, "%s error at %i: %i\n",
__func__, __LINE__, error);
return error;
}
if (!pm_runtime_status_suspended(dev)) {
error = pm_generic_runtime_suspend(dev);
if (error) {
dev_dbg(dev, "%s busy at %i: %i\n",
__func__, __LINE__, error);
return 0;
}
error = sysc_runtime_suspend(ddata->dev);
if (error) {
dev_err(dev, "%s error at %i: %i\n",
__func__, __LINE__, error);
return error;
}
ddata->child_needs_resume = true;
}
return 0;
}
static int sysc_child_resume_noirq(struct device *dev)
{
struct sysc *ddata;
int error;
ddata = sysc_child_to_parent(dev);
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
if (ddata->child_needs_resume) {
ddata->child_needs_resume = false;
error = sysc_runtime_resume(ddata->dev);
if (error)
dev_err(ddata->dev,
"%s runtime resume error: %i\n",
__func__, error);
error = pm_generic_runtime_resume(dev);
if (error)
dev_err(ddata->dev,
"%s generic runtime resume: %i\n",
__func__, error);
}
return pm_generic_resume_noirq(dev);
}
#endif
static struct dev_pm_domain sysc_child_pm_domain = {
.ops = {
SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
sysc_child_runtime_resume,
NULL)
USE_PLATFORM_PM_SLEEP_OPS
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
sysc_child_resume_noirq)
}
};
/* Caller needs to take list_lock if ever used outside of cpu_pm */
static void sysc_reinit_modules(struct sysc_soc_info *soc)
{
struct sysc_module *module;
struct list_head *pos;
struct sysc *ddata;
list_for_each(pos, &sysc_soc->restored_modules) {
module = list_entry(pos, struct sysc_module, node);
ddata = module->ddata;
sysc_reinit_module(ddata, ddata->enabled);
}
}
/**
* sysc_context_notifier - optionally reset and restore module after idle
* @nb: notifier block
* @cmd: unused
* @v: unused
*
* Some interconnect target modules need to be restored, or reset and restored
* on CPU_PM CPU_PM_CLUSTER_EXIT notifier. This is needed at least for am335x
* OTG and GPMC target modules even if the modules are unused.
*/
static int sysc_context_notifier(struct notifier_block *nb, unsigned long cmd,
void *v)
{
struct sysc_soc_info *soc;
soc = container_of(nb, struct sysc_soc_info, nb);
switch (cmd) {
case CPU_CLUSTER_PM_ENTER:
break;
case CPU_CLUSTER_PM_ENTER_FAILED: /* No need to restore context */
break;
case CPU_CLUSTER_PM_EXIT:
sysc_reinit_modules(soc);
break;
}
return NOTIFY_OK;
}
/**
* sysc_add_restored - optionally add reset and restore quirk hanlling
* @ddata: device data
*/
static void sysc_add_restored(struct sysc *ddata)
{
struct sysc_module *restored_module;
restored_module = kzalloc(sizeof(*restored_module), GFP_KERNEL);
if (!restored_module)
return;
restored_module->ddata = ddata;
mutex_lock(&sysc_soc->list_lock);
list_add(&restored_module->node, &sysc_soc->restored_modules);
if (sysc_soc->nb.notifier_call)
goto out_unlock;
sysc_soc->nb.notifier_call = sysc_context_notifier;
cpu_pm_register_notifier(&sysc_soc->nb);
out_unlock:
mutex_unlock(&sysc_soc->list_lock);
}
/**
* sysc_legacy_idle_quirk - handle children in omap_device compatible way
* @ddata: device driver data
* @child: child device driver
*
* Allow idle for child devices as done with _od_runtime_suspend().
* Otherwise many child devices will not idle because of the permanent
* parent usecount set in pm_runtime_irq_safe().
*
* Note that the long term solution is to just modify the child device
* drivers to not set pm_runtime_irq_safe() and then this can be just
* dropped.
*/
static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
{
if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
dev_pm_domain_set(child, &sysc_child_pm_domain);
}
static int sysc_notifier_call(struct notifier_block *nb,
unsigned long event, void *device)
{
struct device *dev = device;
struct sysc *ddata;
int error;
ddata = sysc_child_to_parent(dev);
if (!ddata)
return NOTIFY_DONE;
switch (event) {
case BUS_NOTIFY_ADD_DEVICE:
error = sysc_child_add_clocks(ddata, dev);
if (error)
return error;
sysc_legacy_idle_quirk(ddata, dev);
break;
default:
break;
}
return NOTIFY_DONE;
}
static struct notifier_block sysc_nb = {
.notifier_call = sysc_notifier_call,
};
/* Device tree configured quirks */
struct sysc_dts_quirk {
const char *name;
u32 mask;
};
static const struct sysc_dts_quirk sysc_dts_quirks[] = {
{ .name = "ti,no-idle-on-init",
.mask = SYSC_QUIRK_NO_IDLE_ON_INIT, },
{ .name = "ti,no-reset-on-init",
.mask = SYSC_QUIRK_NO_RESET_ON_INIT, },
{ .name = "ti,no-idle",
.mask = SYSC_QUIRK_NO_IDLE, },
};
static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
bool is_child)
{
const struct property *prop;
int i, len;
for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
const char *name = sysc_dts_quirks[i].name;
prop = of_get_property(np, name, &len);
if (!prop)
continue;
ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
if (is_child) {
dev_warn(ddata->dev,
"dts flag should be at module level for %s\n",
name);
}
}
}
static int sysc_init_dts_quirks(struct sysc *ddata)
{
struct device_node *np = ddata->dev->of_node;
int error;
u32 val;
ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL);
sysc_parse_dts_quirks(ddata, np, false);
error = of_property_read_u32(np, "ti,sysc-delay-us", &val);
if (!error) {
if (val > 255) {
dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n",
val);
}
ddata->cfg.srst_udelay = (u8)val;
}
return 0;
}
static void sysc_unprepare(struct sysc *ddata)
{
int i;
if (!ddata->clocks)
return;
for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
if (!IS_ERR_OR_NULL(ddata->clocks[i]))
clk_unprepare(ddata->clocks[i]);
}
}
/*
* Common sysc register bits found on omap2, also known as type1
*/
static const struct sysc_regbits sysc_regbits_omap2 = {
.dmadisable_shift = -ENODEV,
.midle_shift = 12,
.sidle_shift = 3,
.clkact_shift = 8,
.emufree_shift = 5,
.enwkup_shift = 2,
.srst_shift = 1,
.autoidle_shift = 0,
};
static const struct sysc_capabilities sysc_omap2 = {
.type = TI_SYSC_OMAP2,
.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
SYSC_OMAP2_AUTOIDLE,
.regbits = &sysc_regbits_omap2,
};
/* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */
static const struct sysc_capabilities sysc_omap2_timer = {
.type = TI_SYSC_OMAP2_TIMER,
.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
SYSC_OMAP2_AUTOIDLE,
.regbits = &sysc_regbits_omap2,
.mod_quirks = SYSC_QUIRK_USE_CLOCKACT,
};
/*
* SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2
* with different sidle position
*/
static const struct sysc_regbits sysc_regbits_omap3_sham = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = 4,
.clkact_shift = -ENODEV,
.enwkup_shift = -ENODEV,
.srst_shift = 1,
.autoidle_shift = 0,
.emufree_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_omap3_sham = {
.type = TI_SYSC_OMAP3_SHAM,
.sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
.regbits = &sysc_regbits_omap3_sham,
};
/*
* AES register bits found on omap3 and later, a variant of
* sysc_regbits_omap2 with different sidle position
*/
static const struct sysc_regbits sysc_regbits_omap3_aes = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = 6,
.clkact_shift = -ENODEV,
.enwkup_shift = -ENODEV,
.srst_shift = 1,
.autoidle_shift = 0,
.emufree_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_omap3_aes = {
.type = TI_SYSC_OMAP3_AES,
.sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
.regbits = &sysc_regbits_omap3_aes,
};
/*
* Common sysc register bits found on omap4, also known as type2
*/
static const struct sysc_regbits sysc_regbits_omap4 = {
.dmadisable_shift = 16,
.midle_shift = 4,
.sidle_shift = 2,
.clkact_shift = -ENODEV,
.enwkup_shift = -ENODEV,
.emufree_shift = 1,
.srst_shift = 0,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_omap4 = {
.type = TI_SYSC_OMAP4,
.sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
SYSC_OMAP4_SOFTRESET,
.regbits = &sysc_regbits_omap4,
};
static const struct sysc_capabilities sysc_omap4_timer = {
.type = TI_SYSC_OMAP4_TIMER,
.sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
SYSC_OMAP4_SOFTRESET,
.regbits = &sysc_regbits_omap4,
};
/*
* Common sysc register bits found on omap4, also known as type3
*/
static const struct sysc_regbits sysc_regbits_omap4_simple = {
.dmadisable_shift = -ENODEV,
.midle_shift = 2,
.sidle_shift = 0,
.clkact_shift = -ENODEV,
.enwkup_shift = -ENODEV,
.srst_shift = -ENODEV,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_omap4_simple = {
.type = TI_SYSC_OMAP4_SIMPLE,
.regbits = &sysc_regbits_omap4_simple,
};
/*
* SmartReflex sysc found on omap34xx
*/
static const struct sysc_regbits sysc_regbits_omap34xx_sr = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = -ENODEV,
.clkact_shift = 20,
.enwkup_shift = -ENODEV,
.srst_shift = -ENODEV,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_34xx_sr = {
.type = TI_SYSC_OMAP34XX_SR,
.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
.regbits = &sysc_regbits_omap34xx_sr,
.mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
SYSC_QUIRK_LEGACY_IDLE,
};
/*
* SmartReflex sysc found on omap36xx and later
*/
static const struct sysc_regbits sysc_regbits_omap36xx_sr = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = 24,
.clkact_shift = -ENODEV,
.enwkup_shift = 26,
.srst_shift = -ENODEV,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_36xx_sr = {
.type = TI_SYSC_OMAP36XX_SR,
.sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
.regbits = &sysc_regbits_omap36xx_sr,
.mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
};
static const struct sysc_capabilities sysc_omap4_sr = {
.type = TI_SYSC_OMAP4_SR,
.regbits = &sysc_regbits_omap36xx_sr,
.mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
};
/*
* McASP register bits found on omap4 and later
*/
static const struct sysc_regbits sysc_regbits_omap4_mcasp = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = 0,
.clkact_shift = -ENODEV,
.enwkup_shift = -ENODEV,
.srst_shift = -ENODEV,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_omap4_mcasp = {
.type = TI_SYSC_OMAP4_MCASP,
.regbits = &sysc_regbits_omap4_mcasp,
.mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
};
/*
* McASP found on dra7 and later
*/
static const struct sysc_capabilities sysc_dra7_mcasp = {
.type = TI_SYSC_OMAP4_SIMPLE,
.regbits = &sysc_regbits_omap4_simple,
.mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
};
/*
* FS USB host found on omap4 and later
*/
static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = 24,
.clkact_shift = -ENODEV,
.enwkup_shift = 26,
.srst_shift = -ENODEV,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
.type = TI_SYSC_OMAP4_USB_HOST_FS,
.sysc_mask = SYSC_OMAP2_ENAWAKEUP,
.regbits = &sysc_regbits_omap4_usb_host_fs,
};
static const struct sysc_regbits sysc_regbits_dra7_mcan = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = -ENODEV,
.clkact_shift = -ENODEV,
.enwkup_shift = 4,
.srst_shift = 0,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_dra7_mcan = {
.type = TI_SYSC_DRA7_MCAN,
.sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
.regbits = &sysc_regbits_dra7_mcan,
.mod_quirks = SYSS_QUIRK_RESETDONE_INVERTED,
};
/*
* PRUSS found on some AM33xx, AM437x and AM57xx SoCs
*/
static const struct sysc_capabilities sysc_pruss = {
.type = TI_SYSC_PRUSS,
.sysc_mask = SYSC_PRUSS_STANDBY_INIT | SYSC_PRUSS_SUB_MWAIT,
.regbits = &sysc_regbits_omap4_simple,
.mod_quirks = SYSC_MODULE_QUIRK_PRUSS,
};
static int sysc_init_pdata(struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
struct ti_sysc_module_data *mdata;
if (!pdata)
return 0;
mdata = devm_kzalloc(ddata->dev, sizeof(*mdata), GFP_KERNEL);
if (!mdata)
return -ENOMEM;
if (ddata->legacy_mode) {
mdata->name = ddata->legacy_mode;
mdata->module_pa = ddata->module_pa;
mdata->module_size = ddata->module_size;
mdata->offsets = ddata->offsets;
mdata->nr_offsets = SYSC_MAX_REGS;
mdata->cap = ddata->cap;
mdata->cfg = &ddata->cfg;
}
ddata->mdata = mdata;
return 0;
}
static int sysc_init_match(struct sysc *ddata)
{
const struct sysc_capabilities *cap;
cap = of_device_get_match_data(ddata->dev);
if (!cap)
return -EINVAL;
ddata->cap = cap;
if (ddata->cap)
ddata->cfg.quirks |= ddata->cap->mod_quirks;
return 0;
}
static void ti_sysc_idle(struct work_struct *work)
{
struct sysc *ddata;
ddata = container_of(work, struct sysc, idle_work.work);
/*
* One time decrement of clock usage counts if left on from init.
* Note that we disable opt clocks unconditionally in this case
* as they are enabled unconditionally during init without
* considering sysc_opt_clks_needed() at that point.
*/
if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE |
SYSC_QUIRK_NO_IDLE_ON_INIT)) {
sysc_disable_main_clocks(ddata);
sysc_disable_opt_clocks(ddata);
sysc_clkdm_allow_idle(ddata);
}
/* Keep permanent PM runtime usage count for SYSC_QUIRK_NO_IDLE */
if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
return;
/*
* Decrement PM runtime usage count for SYSC_QUIRK_NO_IDLE_ON_INIT
* and SYSC_QUIRK_NO_RESET_ON_INIT
*/
if (pm_runtime_active(ddata->dev))
pm_runtime_put_sync(ddata->dev);
}
/*
* SoC model and features detection. Only needed for SoCs that need
* special handling for quirks, no need to list others.
*/
static const struct soc_device_attribute sysc_soc_match[] = {
SOC_FLAG("OMAP242*", SOC_2420),
SOC_FLAG("OMAP243*", SOC_2430),
SOC_FLAG("OMAP3[45]*", SOC_3430),
SOC_FLAG("OMAP3[67]*", SOC_3630),
SOC_FLAG("OMAP443*", SOC_4430),
SOC_FLAG("OMAP446*", SOC_4460),
SOC_FLAG("OMAP447*", SOC_4470),
SOC_FLAG("OMAP54*", SOC_5430),
SOC_FLAG("AM433", SOC_AM3),
SOC_FLAG("AM43*", SOC_AM4),
SOC_FLAG("DRA7*", SOC_DRA7),
{ /* sentinel */ },
};
/*
* List of SoCs variants with disabled features. By default we assume all
* devices in the device tree are available so no need to list those SoCs.
*/
static const struct soc_device_attribute sysc_soc_feat_match[] = {
/* OMAP3430/3530 and AM3517 variants with some accelerators disabled */
SOC_FLAG("AM3505", DIS_SGX),
SOC_FLAG("OMAP3525", DIS_SGX),
SOC_FLAG("OMAP3515", DIS_IVA | DIS_SGX),
SOC_FLAG("OMAP3503", DIS_ISP | DIS_IVA | DIS_SGX),
/* OMAP3630/DM3730 variants with some accelerators disabled */
SOC_FLAG("AM3703", DIS_IVA | DIS_SGX),
SOC_FLAG("DM3725", DIS_SGX),
SOC_FLAG("OMAP3611", DIS_ISP | DIS_IVA | DIS_SGX),
SOC_FLAG("OMAP3615/AM3715", DIS_IVA),
SOC_FLAG("OMAP3621", DIS_ISP),
{ /* sentinel */ },
};
static int sysc_add_disabled(unsigned long base)
{
struct sysc_address *disabled_module;
disabled_module = kzalloc(sizeof(*disabled_module), GFP_KERNEL);
if (!disabled_module)
return -ENOMEM;
disabled_module->base = base;
mutex_lock(&sysc_soc->list_lock);
list_add(&disabled_module->node, &sysc_soc->disabled_modules);
mutex_unlock(&sysc_soc->list_lock);
return 0;
}
/*
* One time init to detect the booted SoC, disable unavailable features
* and initialize list for optional cpu_pm notifier.
*
* Note that we initialize static data shared across all ti-sysc instances
* so ddata is only used for SoC type. This can be called from module_init
* once we no longer need to rely on platform data.
*/
static int sysc_init_static_data(struct sysc *ddata)
{
const struct soc_device_attribute *match;
struct ti_sysc_platform_data *pdata;
unsigned long features = 0;
struct device_node *np;
if (sysc_soc)
return 0;
sysc_soc = kzalloc(sizeof(*sysc_soc), GFP_KERNEL);
if (!sysc_soc)
return -ENOMEM;
mutex_init(&sysc_soc->list_lock);
INIT_LIST_HEAD(&sysc_soc->disabled_modules);
INIT_LIST_HEAD(&sysc_soc->restored_modules);
sysc_soc->general_purpose = true;
pdata = dev_get_platdata(ddata->dev);
if (pdata && pdata->soc_type_gp)
sysc_soc->general_purpose = pdata->soc_type_gp();
match = soc_device_match(sysc_soc_match);
if (match && match->data)
sysc_soc->soc = (int)match->data;
/*
* Check and warn about possible old incomplete dtb. We now want to see
* simple-pm-bus instead of simple-bus in the dtb for genpd using SoCs.
*/
switch (sysc_soc->soc) {
case SOC_AM3:
case SOC_AM4:
case SOC_4430 ... SOC_4470:
case SOC_5430:
case SOC_DRA7:
np = of_find_node_by_path("/ocp");
WARN_ONCE(np && of_device_is_compatible(np, "simple-bus"),
"ti-sysc: Incomplete old dtb, please update\n");
break;
default:
break;
}
/* Ignore devices that are not available on HS and EMU SoCs */
if (!sysc_soc->general_purpose) {
switch (sysc_soc->soc) {
case SOC_3430 ... SOC_3630:
sysc_add_disabled(0x48304000); /* timer12 */
break;
case SOC_AM3:
sysc_add_disabled(0x48310000); /* rng */
default:
break;
}
}
match = soc_device_match(sysc_soc_feat_match);
if (!match)
return 0;
if (match->data)
features = (unsigned long)match->data;
/*
* Add disabled devices to the list based on the module base.
* Note that this must be done before we attempt to access the
* device and have module revision checks working.
*/
if (features & DIS_ISP)
sysc_add_disabled(0x480bd400);
if (features & DIS_IVA)
sysc_add_disabled(0x5d000000);
if (features & DIS_SGX)
sysc_add_disabled(0x50000000);
return 0;
}
static void sysc_cleanup_static_data(void)
{
struct sysc_module *restored_module;
struct sysc_address *disabled_module;
struct list_head *pos, *tmp;
if (!sysc_soc)
return;
if (sysc_soc->nb.notifier_call)
cpu_pm_unregister_notifier(&sysc_soc->nb);
mutex_lock(&sysc_soc->list_lock);
list_for_each_safe(pos, tmp, &sysc_soc->restored_modules) {
restored_module = list_entry(pos, struct sysc_module, node);
list_del(pos);
kfree(restored_module);
}
list_for_each_safe(pos, tmp, &sysc_soc->disabled_modules) {
disabled_module = list_entry(pos, struct sysc_address, node);
list_del(pos);
kfree(disabled_module);
}
mutex_unlock(&sysc_soc->list_lock);
}
static int sysc_check_disabled_devices(struct sysc *ddata)
{
struct sysc_address *disabled_module;
struct list_head *pos;
int error = 0;
mutex_lock(&sysc_soc->list_lock);
list_for_each(pos, &sysc_soc->disabled_modules) {
disabled_module = list_entry(pos, struct sysc_address, node);
if (ddata->module_pa == disabled_module->base) {
dev_dbg(ddata->dev, "module disabled for this SoC\n");
error = -ENODEV;
break;
}
}
mutex_unlock(&sysc_soc->list_lock);
return error;
}
/*
* Ignore timers tagged with no-reset and no-idle. These are likely in use,
* for example by drivers/clocksource/timer-ti-dm-systimer.c. If more checks
* are needed, we could also look at the timer register configuration.
*/
static int sysc_check_active_timer(struct sysc *ddata)
{
if (ddata->cap->type != TI_SYSC_OMAP2_TIMER &&
ddata->cap->type != TI_SYSC_OMAP4_TIMER)
return 0;
if ((ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT) &&
(ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE))
return -ENXIO;
return 0;
}
static const struct of_device_id sysc_match_table[] = {
{ .compatible = "simple-bus", },
{ /* sentinel */ },
};
static int sysc_probe(struct platform_device *pdev)
{
struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct sysc *ddata;
int error;
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
ddata->offsets[SYSC_REVISION] = -ENODEV;
ddata->offsets[SYSC_SYSCONFIG] = -ENODEV;
ddata->offsets[SYSC_SYSSTATUS] = -ENODEV;
ddata->dev = &pdev->dev;
platform_set_drvdata(pdev, ddata);
error = sysc_init_static_data(ddata);
if (error)
return error;
error = sysc_init_match(ddata);
if (error)
return error;
error = sysc_init_dts_quirks(ddata);
if (error)
return error;
error = sysc_map_and_check_registers(ddata);
if (error)
return error;
error = sysc_init_sysc_mask(ddata);
if (error)
return error;
error = sysc_init_idlemodes(ddata);
if (error)
return error;
error = sysc_init_syss_mask(ddata);
if (error)
return error;
error = sysc_init_pdata(ddata);
if (error)
return error;
sysc_init_early_quirks(ddata);
error = sysc_check_disabled_devices(ddata);
if (error)
return error;
error = sysc_check_active_timer(ddata);
if (error == -ENXIO)
ddata->reserved = true;
else if (error)
return error;
error = sysc_get_clocks(ddata);
if (error)
return error;
error = sysc_init_resets(ddata);
if (error)
goto unprepare;
error = sysc_init_module(ddata);
if (error)
goto unprepare;
pm_runtime_enable(ddata->dev);
error = pm_runtime_resume_and_get(ddata->dev);
if (error < 0) {
pm_runtime_disable(ddata->dev);
goto unprepare;
}
/* Balance use counts as PM runtime should have enabled these all */
if (!(ddata->cfg.quirks &
(SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))) {
sysc_disable_main_clocks(ddata);
sysc_disable_opt_clocks(ddata);
sysc_clkdm_allow_idle(ddata);
}
if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT))
reset_control_assert(ddata->rsts);
sysc_show_registers(ddata);
ddata->dev->type = &sysc_device_type;
if (!ddata->reserved) {
error = of_platform_populate(ddata->dev->of_node,
sysc_match_table,
pdata ? pdata->auxdata : NULL,
ddata->dev);
if (error)
goto err;
}
INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle);
/* At least earlycon won't survive without deferred idle */
if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE |
SYSC_QUIRK_NO_IDLE_ON_INIT |
SYSC_QUIRK_NO_RESET_ON_INIT)) {
schedule_delayed_work(&ddata->idle_work, 3000);
} else {
pm_runtime_put(&pdev->dev);
}
if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_CTX_LOST)
sysc_add_restored(ddata);
return 0;
err:
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
unprepare:
sysc_unprepare(ddata);
return error;
}
static int sysc_remove(struct platform_device *pdev)
{
struct sysc *ddata = platform_get_drvdata(pdev);
int error;
cancel_delayed_work_sync(&ddata->idle_work);
error = pm_runtime_resume_and_get(ddata->dev);
if (error < 0) {
pm_runtime_disable(ddata->dev);
goto unprepare;
}
of_platform_depopulate(&pdev->dev);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (!reset_control_status(ddata->rsts))
reset_control_assert(ddata->rsts);
unprepare:
sysc_unprepare(ddata);
return 0;
}
static const struct of_device_id sysc_match[] = {
{ .compatible = "ti,sysc-omap2", .data = &sysc_omap2, },
{ .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, },
{ .compatible = "ti,sysc-omap4", .data = &sysc_omap4, },
{ .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, },
{ .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, },
{ .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, },
{ .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, },
{ .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, },
{ .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, },
{ .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, },
{ .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
{ .compatible = "ti,sysc-dra7-mcasp", .data = &sysc_dra7_mcasp, },
{ .compatible = "ti,sysc-usb-host-fs",
.data = &sysc_omap4_usb_host_fs, },
{ .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
{ .compatible = "ti,sysc-pruss", .data = &sysc_pruss, },
{ },
};
MODULE_DEVICE_TABLE(of, sysc_match);
static struct platform_driver sysc_driver = {
.probe = sysc_probe,
.remove = sysc_remove,
.driver = {
.name = "ti-sysc",
.of_match_table = sysc_match,
.pm = &sysc_pm_ops,
},
};
static int __init sysc_init(void)
{
bus_register_notifier(&platform_bus_type, &sysc_nb);
return platform_driver_register(&sysc_driver);
}
module_init(sysc_init);
static void __exit sysc_exit(void)
{
bus_unregister_notifier(&platform_bus_type, &sysc_nb);
platform_driver_unregister(&sysc_driver);
sysc_cleanup_static_data();
}
module_exit(sysc_exit);
MODULE_DESCRIPTION("TI sysc interconnect target driver");
MODULE_LICENSE("GPL v2");
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