select REGULATOR if MMC_ARMMMCI
select REGULATOR_FIXED_VOLTAGE if REGULATOR
select VEXPRESS_CONFIG
- select VEXPRESS_SYSCFG
help
This option enables support for systems using Cortex processor based
ARM core and logic (FPGA) tiles on the Versatile Express motherboard,
#include <linux/err.h>
#include <linux/init.h>
+#include <linux/io.h>
#include <linux/of.h>
+#include <linux/platform_device.h>
#include <linux/of_device.h>
+#include <linux/sched/signal.h>
+#include <linux/slab.h>
#include <linux/vexpress.h>
+#define SYS_CFGDATA 0x0
+
+#define SYS_CFGCTRL 0x4
+#define SYS_CFGCTRL_START (1 << 31)
+#define SYS_CFGCTRL_WRITE (1 << 30)
+#define SYS_CFGCTRL_DCC(n) (((n) & 0xf) << 26)
+#define SYS_CFGCTRL_FUNC(n) (((n) & 0x3f) << 20)
+#define SYS_CFGCTRL_SITE(n) (((n) & 0x3) << 16)
+#define SYS_CFGCTRL_POSITION(n) (((n) & 0xf) << 12)
+#define SYS_CFGCTRL_DEVICE(n) (((n) & 0xfff) << 0)
+
+#define SYS_CFGSTAT 0x8
+#define SYS_CFGSTAT_ERR (1 << 1)
+#define SYS_CFGSTAT_COMPLETE (1 << 0)
+
+
+struct vexpress_syscfg {
+ struct device *dev;
+ void __iomem *base;
+ struct list_head funcs;
+};
+
+struct vexpress_syscfg_func {
+ struct list_head list;
+ struct vexpress_syscfg *syscfg;
+ struct regmap *regmap;
+ int num_templates;
+ u32 template[]; /* Keep it last! */
+};
+
+struct vexpress_config_bridge_ops {
+ struct regmap * (*regmap_init)(struct device *dev, void *context);
+ void (*regmap_exit)(struct regmap *regmap, void *context);
+};
struct vexpress_config_bridge {
struct vexpress_config_bridge_ops *ops;
vexpress_config_site_master = site;
}
-u32 vexpress_config_get_master(void)
-{
- return vexpress_config_site_master;
-}
-
-void vexpress_config_lock(void *arg)
+static void vexpress_config_lock(void *arg)
{
mutex_lock(&vexpress_config_mutex);
}
-void vexpress_config_unlock(void *arg)
+static void vexpress_config_unlock(void *arg)
{
mutex_unlock(&vexpress_config_mutex);
}
}
}
-int vexpress_config_get_topo(struct device_node *node, u32 *site,
+static int vexpress_config_get_topo(struct device_node *node, u32 *site,
u32 *position, u32 *dcc)
{
vexpress_config_find_prop(node, "arm,vexpress,site", site);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_vexpress_config);
-struct device *vexpress_config_bridge_register(struct device *parent,
+static struct device *vexpress_config_bridge_register(struct device *parent,
struct vexpress_config_bridge_ops *ops, void *context)
{
struct device *dev;
}
postcore_initcall(vexpress_config_init);
+static int vexpress_syscfg_exec(struct vexpress_syscfg_func *func,
+ int index, bool write, u32 *data)
+{
+ struct vexpress_syscfg *syscfg = func->syscfg;
+ u32 command, status;
+ int tries;
+ long timeout;
+
+ if (WARN_ON(index >= func->num_templates))
+ return -EINVAL;
+
+ command = readl(syscfg->base + SYS_CFGCTRL);
+ if (WARN_ON(command & SYS_CFGCTRL_START))
+ return -EBUSY;
+
+ command = func->template[index];
+ command |= SYS_CFGCTRL_START;
+ command |= write ? SYS_CFGCTRL_WRITE : 0;
+
+ /* Use a canary for reads */
+ if (!write)
+ *data = 0xdeadbeef;
+
+ dev_dbg(syscfg->dev, "func %p, command %x, data %x\n",
+ func, command, *data);
+ writel(*data, syscfg->base + SYS_CFGDATA);
+ writel(0, syscfg->base + SYS_CFGSTAT);
+ writel(command, syscfg->base + SYS_CFGCTRL);
+ mb();
+
+ /* The operation can take ages... Go to sleep, 100us initially */
+ tries = 100;
+ timeout = 100;
+ do {
+ if (!irqs_disabled()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(usecs_to_jiffies(timeout));
+ if (signal_pending(current))
+ return -EINTR;
+ } else {
+ udelay(timeout);
+ }
+
+ status = readl(syscfg->base + SYS_CFGSTAT);
+ if (status & SYS_CFGSTAT_ERR)
+ return -EFAULT;
+
+ if (timeout > 20)
+ timeout -= 20;
+ } while (--tries && !(status & SYS_CFGSTAT_COMPLETE));
+ if (WARN_ON_ONCE(!tries))
+ return -ETIMEDOUT;
+
+ if (!write) {
+ *data = readl(syscfg->base + SYS_CFGDATA);
+ dev_dbg(syscfg->dev, "func %p, read data %x\n", func, *data);
+ }
+
+ return 0;
+}
+
+static int vexpress_syscfg_read(void *context, unsigned int index,
+ unsigned int *val)
+{
+ struct vexpress_syscfg_func *func = context;
+
+ return vexpress_syscfg_exec(func, index, false, val);
+}
+
+static int vexpress_syscfg_write(void *context, unsigned int index,
+ unsigned int val)
+{
+ struct vexpress_syscfg_func *func = context;
+
+ return vexpress_syscfg_exec(func, index, true, &val);
+}
+
+static struct regmap_config vexpress_syscfg_regmap_config = {
+ .lock = vexpress_config_lock,
+ .unlock = vexpress_config_unlock,
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_read = vexpress_syscfg_read,
+ .reg_write = vexpress_syscfg_write,
+ .reg_format_endian = REGMAP_ENDIAN_LITTLE,
+ .val_format_endian = REGMAP_ENDIAN_LITTLE,
+};
+
+
+static struct regmap *vexpress_syscfg_regmap_init(struct device *dev,
+ void *context)
+{
+ int err;
+ struct vexpress_syscfg *syscfg = context;
+ struct vexpress_syscfg_func *func;
+ struct property *prop;
+ const __be32 *val = NULL;
+ __be32 energy_quirk[4];
+ int num;
+ u32 site, position, dcc;
+ int i;
+
+ err = vexpress_config_get_topo(dev->of_node, &site,
+ &position, &dcc);
+ if (err)
+ return ERR_PTR(err);
+
+ prop = of_find_property(dev->of_node,
+ "arm,vexpress-sysreg,func", NULL);
+ if (!prop)
+ return ERR_PTR(-EINVAL);
+
+ num = prop->length / sizeof(u32) / 2;
+ val = prop->value;
+
+ /*
+ * "arm,vexpress-energy" function used to be described
+ * by its first device only, now it requires both
+ */
+ if (num == 1 && of_device_is_compatible(dev->of_node,
+ "arm,vexpress-energy")) {
+ num = 2;
+ energy_quirk[0] = *val;
+ energy_quirk[2] = *val++;
+ energy_quirk[1] = *val;
+ energy_quirk[3] = cpu_to_be32(be32_to_cpup(val) + 1);
+ val = energy_quirk;
+ }
+
+ func = kzalloc(struct_size(func, template, num), GFP_KERNEL);
+ if (!func)
+ return ERR_PTR(-ENOMEM);
+
+ func->syscfg = syscfg;
+ func->num_templates = num;
+
+ for (i = 0; i < num; i++) {
+ u32 function, device;
+
+ function = be32_to_cpup(val++);
+ device = be32_to_cpup(val++);
+
+ dev_dbg(dev, "func %p: %u/%u/%u/%u/%u\n",
+ func, site, position, dcc,
+ function, device);
+
+ func->template[i] = SYS_CFGCTRL_DCC(dcc);
+ func->template[i] |= SYS_CFGCTRL_SITE(site);
+ func->template[i] |= SYS_CFGCTRL_POSITION(position);
+ func->template[i] |= SYS_CFGCTRL_FUNC(function);
+ func->template[i] |= SYS_CFGCTRL_DEVICE(device);
+ }
+
+ vexpress_syscfg_regmap_config.max_register = num - 1;
+
+ func->regmap = regmap_init(dev, NULL, func,
+ &vexpress_syscfg_regmap_config);
+
+ if (IS_ERR(func->regmap)) {
+ void *err = func->regmap;
+
+ kfree(func);
+ return err;
+ }
+
+ list_add(&func->list, &syscfg->funcs);
+
+ return func->regmap;
+}
+
+static void vexpress_syscfg_regmap_exit(struct regmap *regmap, void *context)
+{
+ struct vexpress_syscfg *syscfg = context;
+ struct vexpress_syscfg_func *func, *tmp;
+
+ regmap_exit(regmap);
+
+ list_for_each_entry_safe(func, tmp, &syscfg->funcs, list) {
+ if (func->regmap == regmap) {
+ list_del(&syscfg->funcs);
+ kfree(func);
+ break;
+ }
+ }
+}
+
+static struct vexpress_config_bridge_ops vexpress_syscfg_bridge_ops = {
+ .regmap_init = vexpress_syscfg_regmap_init,
+ .regmap_exit = vexpress_syscfg_regmap_exit,
+};
+
+
+static int vexpress_syscfg_probe(struct platform_device *pdev)
+{
+ struct vexpress_syscfg *syscfg;
+ struct resource *res;
+ struct device *bridge;
+
+ syscfg = devm_kzalloc(&pdev->dev, sizeof(*syscfg), GFP_KERNEL);
+ if (!syscfg)
+ return -ENOMEM;
+ syscfg->dev = &pdev->dev;
+ INIT_LIST_HEAD(&syscfg->funcs);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ syscfg->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(syscfg->base))
+ return PTR_ERR(syscfg->base);
+
+ /* Must use dev.parent (MFD), as that's where DT phandle points at... */
+ bridge = vexpress_config_bridge_register(pdev->dev.parent,
+ &vexpress_syscfg_bridge_ops, syscfg);
+
+ return PTR_ERR_OR_ZERO(bridge);
+}
+
+static const struct platform_device_id vexpress_syscfg_id_table[] = {
+ { "vexpress-syscfg", },
+ {},
+};
+
+static struct platform_driver vexpress_syscfg_driver = {
+ .driver.name = "vexpress-syscfg",
+ .id_table = vexpress_syscfg_id_table,
+ .probe = vexpress_syscfg_probe,
+};
+
+static int __init vexpress_syscfg_init(void)
+{
+ return platform_driver_register(&vexpress_syscfg_driver);
+}
+core_initcall(vexpress_syscfg_init);
config SRAM_EXEC
bool
-config VEXPRESS_SYSCFG
- bool "Versatile Express System Configuration driver"
- depends on VEXPRESS_CONFIG
- default y
- help
- ARM Ltd. Versatile Express uses specialised platform configuration
- bus. System Configuration interface is one of the possible means
- of generating transactions on this bus.
-
config PCI_ENDPOINT_TEST
depends on PCI
select CRC32
obj-y += mic/
obj-$(CONFIG_GENWQE) += genwqe/
obj-$(CONFIG_ECHO) += echo/
-obj-$(CONFIG_VEXPRESS_SYSCFG) += vexpress-syscfg.o
obj-$(CONFIG_CXL_BASE) += cxl/
obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o
obj-$(CONFIG_OCXL) += ocxl/
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *
- * Copyright (C) 2014 ARM Limited
- */
-
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/sched/signal.h>
-#include <linux/slab.h>
-#include <linux/syscore_ops.h>
-#include <linux/vexpress.h>
-
-
-#define SYS_CFGDATA 0x0
-
-#define SYS_CFGCTRL 0x4
-#define SYS_CFGCTRL_START (1 << 31)
-#define SYS_CFGCTRL_WRITE (1 << 30)
-#define SYS_CFGCTRL_DCC(n) (((n) & 0xf) << 26)
-#define SYS_CFGCTRL_FUNC(n) (((n) & 0x3f) << 20)
-#define SYS_CFGCTRL_SITE(n) (((n) & 0x3) << 16)
-#define SYS_CFGCTRL_POSITION(n) (((n) & 0xf) << 12)
-#define SYS_CFGCTRL_DEVICE(n) (((n) & 0xfff) << 0)
-
-#define SYS_CFGSTAT 0x8
-#define SYS_CFGSTAT_ERR (1 << 1)
-#define SYS_CFGSTAT_COMPLETE (1 << 0)
-
-
-struct vexpress_syscfg {
- struct device *dev;
- void __iomem *base;
- struct list_head funcs;
-};
-
-struct vexpress_syscfg_func {
- struct list_head list;
- struct vexpress_syscfg *syscfg;
- struct regmap *regmap;
- int num_templates;
- u32 template[]; /* Keep it last! */
-};
-
-
-static int vexpress_syscfg_exec(struct vexpress_syscfg_func *func,
- int index, bool write, u32 *data)
-{
- struct vexpress_syscfg *syscfg = func->syscfg;
- u32 command, status;
- int tries;
- long timeout;
-
- if (WARN_ON(index >= func->num_templates))
- return -EINVAL;
-
- command = readl(syscfg->base + SYS_CFGCTRL);
- if (WARN_ON(command & SYS_CFGCTRL_START))
- return -EBUSY;
-
- command = func->template[index];
- command |= SYS_CFGCTRL_START;
- command |= write ? SYS_CFGCTRL_WRITE : 0;
-
- /* Use a canary for reads */
- if (!write)
- *data = 0xdeadbeef;
-
- dev_dbg(syscfg->dev, "func %p, command %x, data %x\n",
- func, command, *data);
- writel(*data, syscfg->base + SYS_CFGDATA);
- writel(0, syscfg->base + SYS_CFGSTAT);
- writel(command, syscfg->base + SYS_CFGCTRL);
- mb();
-
- /* The operation can take ages... Go to sleep, 100us initially */
- tries = 100;
- timeout = 100;
- do {
- if (!irqs_disabled()) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(usecs_to_jiffies(timeout));
- if (signal_pending(current))
- return -EINTR;
- } else {
- udelay(timeout);
- }
-
- status = readl(syscfg->base + SYS_CFGSTAT);
- if (status & SYS_CFGSTAT_ERR)
- return -EFAULT;
-
- if (timeout > 20)
- timeout -= 20;
- } while (--tries && !(status & SYS_CFGSTAT_COMPLETE));
- if (WARN_ON_ONCE(!tries))
- return -ETIMEDOUT;
-
- if (!write) {
- *data = readl(syscfg->base + SYS_CFGDATA);
- dev_dbg(syscfg->dev, "func %p, read data %x\n", func, *data);
- }
-
- return 0;
-}
-
-static int vexpress_syscfg_read(void *context, unsigned int index,
- unsigned int *val)
-{
- struct vexpress_syscfg_func *func = context;
-
- return vexpress_syscfg_exec(func, index, false, val);
-}
-
-static int vexpress_syscfg_write(void *context, unsigned int index,
- unsigned int val)
-{
- struct vexpress_syscfg_func *func = context;
-
- return vexpress_syscfg_exec(func, index, true, &val);
-}
-
-static struct regmap_config vexpress_syscfg_regmap_config = {
- .lock = vexpress_config_lock,
- .unlock = vexpress_config_unlock,
- .reg_bits = 32,
- .val_bits = 32,
- .reg_read = vexpress_syscfg_read,
- .reg_write = vexpress_syscfg_write,
- .reg_format_endian = REGMAP_ENDIAN_LITTLE,
- .val_format_endian = REGMAP_ENDIAN_LITTLE,
-};
-
-
-static struct regmap *vexpress_syscfg_regmap_init(struct device *dev,
- void *context)
-{
- int err;
- struct vexpress_syscfg *syscfg = context;
- struct vexpress_syscfg_func *func;
- struct property *prop;
- const __be32 *val = NULL;
- __be32 energy_quirk[4];
- int num;
- u32 site, position, dcc;
- int i;
-
- err = vexpress_config_get_topo(dev->of_node, &site,
- &position, &dcc);
- if (err)
- return ERR_PTR(err);
-
- prop = of_find_property(dev->of_node,
- "arm,vexpress-sysreg,func", NULL);
- if (!prop)
- return ERR_PTR(-EINVAL);
-
- num = prop->length / sizeof(u32) / 2;
- val = prop->value;
-
- /*
- * "arm,vexpress-energy" function used to be described
- * by its first device only, now it requires both
- */
- if (num == 1 && of_device_is_compatible(dev->of_node,
- "arm,vexpress-energy")) {
- num = 2;
- energy_quirk[0] = *val;
- energy_quirk[2] = *val++;
- energy_quirk[1] = *val;
- energy_quirk[3] = cpu_to_be32(be32_to_cpup(val) + 1);
- val = energy_quirk;
- }
-
- func = kzalloc(struct_size(func, template, num), GFP_KERNEL);
- if (!func)
- return ERR_PTR(-ENOMEM);
-
- func->syscfg = syscfg;
- func->num_templates = num;
-
- for (i = 0; i < num; i++) {
- u32 function, device;
-
- function = be32_to_cpup(val++);
- device = be32_to_cpup(val++);
-
- dev_dbg(dev, "func %p: %u/%u/%u/%u/%u\n",
- func, site, position, dcc,
- function, device);
-
- func->template[i] = SYS_CFGCTRL_DCC(dcc);
- func->template[i] |= SYS_CFGCTRL_SITE(site);
- func->template[i] |= SYS_CFGCTRL_POSITION(position);
- func->template[i] |= SYS_CFGCTRL_FUNC(function);
- func->template[i] |= SYS_CFGCTRL_DEVICE(device);
- }
-
- vexpress_syscfg_regmap_config.max_register = num - 1;
-
- func->regmap = regmap_init(dev, NULL, func,
- &vexpress_syscfg_regmap_config);
-
- if (IS_ERR(func->regmap)) {
- void *err = func->regmap;
-
- kfree(func);
- return err;
- }
-
- list_add(&func->list, &syscfg->funcs);
-
- return func->regmap;
-}
-
-static void vexpress_syscfg_regmap_exit(struct regmap *regmap, void *context)
-{
- struct vexpress_syscfg *syscfg = context;
- struct vexpress_syscfg_func *func, *tmp;
-
- regmap_exit(regmap);
-
- list_for_each_entry_safe(func, tmp, &syscfg->funcs, list) {
- if (func->regmap == regmap) {
- list_del(&syscfg->funcs);
- kfree(func);
- break;
- }
- }
-}
-
-static struct vexpress_config_bridge_ops vexpress_syscfg_bridge_ops = {
- .regmap_init = vexpress_syscfg_regmap_init,
- .regmap_exit = vexpress_syscfg_regmap_exit,
-};
-
-
-static int vexpress_syscfg_probe(struct platform_device *pdev)
-{
- struct vexpress_syscfg *syscfg;
- struct resource *res;
- struct device *bridge;
-
- syscfg = devm_kzalloc(&pdev->dev, sizeof(*syscfg), GFP_KERNEL);
- if (!syscfg)
- return -ENOMEM;
- syscfg->dev = &pdev->dev;
- INIT_LIST_HEAD(&syscfg->funcs);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- syscfg->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(syscfg->base))
- return PTR_ERR(syscfg->base);
-
- /* Must use dev.parent (MFD), as that's where DT phandle points at... */
- bridge = vexpress_config_bridge_register(pdev->dev.parent,
- &vexpress_syscfg_bridge_ops, syscfg);
-
- return PTR_ERR_OR_ZERO(bridge);
-}
-
-static const struct platform_device_id vexpress_syscfg_id_table[] = {
- { "vexpress-syscfg", },
- {},
-};
-
-static struct platform_driver vexpress_syscfg_driver = {
- .driver.name = "vexpress-syscfg",
- .id_table = vexpress_syscfg_id_table,
- .probe = vexpress_syscfg_probe,
-};
-
-static int __init vexpress_syscfg_init(void)
-{
- return platform_driver_register(&vexpress_syscfg_driver);
-}
-core_initcall(vexpress_syscfg_init);
/* Config infrastructure */
void vexpress_config_set_master(u32 site);
-u32 vexpress_config_get_master(void);
-
-void vexpress_config_lock(void *arg);
-void vexpress_config_unlock(void *arg);
-
-int vexpress_config_get_topo(struct device_node *node, u32 *site,
- u32 *position, u32 *dcc);
-
-/* Config bridge API */
-
-struct vexpress_config_bridge_ops {
- struct regmap * (*regmap_init)(struct device *dev, void *context);
- void (*regmap_exit)(struct regmap *regmap, void *context);
-};
-
-struct device *vexpress_config_bridge_register(struct device *parent,
- struct vexpress_config_bridge_ops *ops, void *context);
/* Config regmap API */
projects / linux-2.6-microblaze.git / commitdiff