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-rw-r--r--drivers/edac/Kconfig1
-rw-r--r--drivers/edac/pnd2_edac.c62
-rw-r--r--drivers/i2c/busses/Kconfig1
-rw-r--r--drivers/i2c/busses/i2c-i801.c39
-rw-r--r--drivers/leds/simple/Kconfig6
-rw-r--r--drivers/leds/simple/Makefile1
-rw-r--r--drivers/leds/simple/simatic-ipc-leds-gpio.c105
-rw-r--r--drivers/leds/simple/simatic-ipc-leds.c80
-rw-r--r--drivers/mfd/Kconfig1
-rw-r--r--drivers/mfd/bcm2835-pm.c74
-rw-r--r--drivers/mfd/lpc_ich.c161
-rw-r--r--drivers/pinctrl/intel/pinctrl-intel.c14
-rw-r--r--drivers/platform/x86/intel/Kconfig12
-rw-r--r--drivers/platform/x86/intel/Makefile2
-rw-r--r--drivers/platform/x86/intel/p2sb.c133
-rw-r--r--drivers/platform/x86/simatic-ipc.c43
-rw-r--r--drivers/soc/bcm/bcm2835-power.c72
-rw-r--r--drivers/watchdog/Kconfig1
-rw-r--r--drivers/watchdog/simatic-ipc-wdt.c15
-rw-r--r--include/linux/mfd/bcm2835-pm.h1
-rw-r--r--include/linux/platform_data/x86/p2sb.h28
-rw-r--r--include/linux/platform_data/x86/simatic-ipc-base.h2
22 files changed, 567 insertions, 287 deletions
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index d3e2477948c8..17562cf1fe97 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -263,6 +263,7 @@ config EDAC_I10NM
config EDAC_PND2
tristate "Intel Pondicherry2"
depends on PCI && X86_64 && X86_MCE_INTEL
+ select P2SB if X86
help
Support for error detection and correction on the Intel
Pondicherry2 Integrated Memory Controller. This SoC IP is
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index c94ca1f790c4..a20b299f1202 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -28,6 +28,8 @@
#include <linux/bitmap.h>
#include <linux/math64.h>
#include <linux/mod_devicetable.h>
+#include <linux/platform_data/x86/p2sb.h>
+
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/processor.h>
@@ -232,42 +234,14 @@ static u64 get_mem_ctrl_hub_base_addr(void)
return U64_LSHIFT(hi.base, 32) | U64_LSHIFT(lo.base, 15);
}
-static u64 get_sideband_reg_base_addr(void)
-{
- struct pci_dev *pdev;
- u32 hi, lo;
- u8 hidden;
-
- pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x19dd, NULL);
- if (pdev) {
- /* Unhide the P2SB device, if it's hidden */
- pci_read_config_byte(pdev, 0xe1, &hidden);
- if (hidden)
- pci_write_config_byte(pdev, 0xe1, 0);
-
- pci_read_config_dword(pdev, 0x10, &lo);
- pci_read_config_dword(pdev, 0x14, &hi);
- lo &= 0xfffffff0;
-
- /* Hide the P2SB device, if it was hidden before */
- if (hidden)
- pci_write_config_byte(pdev, 0xe1, hidden);
-
- pci_dev_put(pdev);
- return (U64_LSHIFT(hi, 32) | U64_LSHIFT(lo, 0));
- } else {
- return 0xfd000000;
- }
-}
-
#define DNV_MCHBAR_SIZE 0x8000
#define DNV_SB_PORT_SIZE 0x10000
static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, char *name)
{
struct pci_dev *pdev;
- char *base;
- u64 addr;
- unsigned long size;
+ void __iomem *base;
+ struct resource r;
+ int ret;
if (op == 4) {
pdev = pci_get_device(PCI_VENDOR_ID_INTEL, 0x1980, NULL);
@@ -279,26 +253,30 @@ static int dnv_rd_reg(int port, int off, int op, void *data, size_t sz, char *na
} else {
/* MMIO via memory controller hub base address */
if (op == 0 && port == 0x4c) {
- addr = get_mem_ctrl_hub_base_addr();
- if (!addr)
+ memset(&r, 0, sizeof(r));
+
+ r.start = get_mem_ctrl_hub_base_addr();
+ if (!r.start)
return -ENODEV;
- size = DNV_MCHBAR_SIZE;
+ r.end = r.start + DNV_MCHBAR_SIZE - 1;
} else {
/* MMIO via sideband register base address */
- addr = get_sideband_reg_base_addr();
- if (!addr)
- return -ENODEV;
- addr += (port << 16);
- size = DNV_SB_PORT_SIZE;
+ ret = p2sb_bar(NULL, 0, &r);
+ if (ret)
+ return ret;
+
+ r.start += (port << 16);
+ r.end = r.start + DNV_SB_PORT_SIZE - 1;
}
- base = ioremap((resource_size_t)addr, size);
+ base = ioremap(r.start, resource_size(&r));
if (!base)
return -ENODEV;
if (sz == 8)
- *(u32 *)(data + 4) = *(u32 *)(base + off + 4);
- *(u32 *)data = *(u32 *)(base + off);
+ *(u64 *)data = readq(base + off);
+ else
+ *(u32 *)data = readl(base + off);
iounmap(base);
}
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index a1bae59208e3..4d0a195ca3ef 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -108,6 +108,7 @@ config I2C_HIX5HD2
config I2C_I801
tristate "Intel 82801 (ICH/PCH)"
depends on PCI
+ select P2SB if X86
select CHECK_SIGNATURE if X86 && DMI
select I2C_SMBUS
help
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index ff706349bdfb..f7a0bb372e8e 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -111,6 +111,7 @@
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/platform_data/itco_wdt.h>
+#include <linux/platform_data/x86/p2sb.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
@@ -140,7 +141,6 @@
#define TCOBASE 0x050
#define TCOCTL 0x054
-#define SBREG_BAR 0x10
#define SBREG_SMBCTRL 0xc6000c
#define SBREG_SMBCTRL_DNV 0xcf000c
@@ -1482,45 +1482,24 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev,
.version = 4,
};
struct resource *res;
- unsigned int devfn;
- u64 base64_addr;
- u32 base_addr;
- u8 hidden;
+ int ret;
/*
* We must access the NO_REBOOT bit over the Primary to Sideband
- * bridge (P2SB). The BIOS prevents the P2SB device from being
- * enumerated by the PCI subsystem, so we need to unhide/hide it
- * to lookup the P2SB BAR.
+ * (P2SB) bridge.
*/
- pci_lock_rescan_remove();
-
- devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1);
-
- /* Unhide the P2SB device, if it is hidden */
- pci_bus_read_config_byte(pci_dev->bus, devfn, 0xe1, &hidden);
- if (hidden)
- pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, 0x0);
-
- pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR, &base_addr);
- base64_addr = base_addr & 0xfffffff0;
-
- pci_bus_read_config_dword(pci_dev->bus, devfn, SBREG_BAR + 0x4, &base_addr);
- base64_addr |= (u64)base_addr << 32;
-
- /* Hide the P2SB device, if it was hidden before */
- if (hidden)
- pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden);
- pci_unlock_rescan_remove();
res = &tco_res[1];
+ ret = p2sb_bar(pci_dev->bus, 0, res);
+ if (ret)
+ return ERR_PTR(ret);
+
if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS)
- res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL_DNV;
+ res->start += SBREG_SMBCTRL_DNV;
else
- res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+ res->start += SBREG_SMBCTRL;
res->end = res->start + 3;
- res->flags = IORESOURCE_MEM;
return platform_device_register_resndata(&pci_dev->dev, "iTCO_wdt", -1,
tco_res, 2, &pldata, sizeof(pldata));
diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig
index 9f6a68336659..fd2b8225d926 100644
--- a/drivers/leds/simple/Kconfig
+++ b/drivers/leds/simple/Kconfig
@@ -1,11 +1,11 @@
# SPDX-License-Identifier: GPL-2.0-only
config LEDS_SIEMENS_SIMATIC_IPC
tristate "LED driver for Siemens Simatic IPCs"
- depends on LEDS_CLASS
+ depends on LEDS_GPIO
depends on SIEMENS_SIMATIC_IPC
help
This option enables support for the LEDs of several Industrial PCs
from Siemens.
- To compile this driver as a module, choose M here: the module
- will be called simatic-ipc-leds.
+ To compile this driver as a module, choose M here: the modules
+ will be called simatic-ipc-leds and simatic-ipc-leds-gpio.
diff --git a/drivers/leds/simple/Makefile b/drivers/leds/simple/Makefile
index 8481f1e9e360..1c7ef5e1324b 100644
--- a/drivers/leds/simple/Makefile
+++ b/drivers/leds/simple/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds.o
+obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds-gpio.o
diff --git a/drivers/leds/simple/simatic-ipc-leds-gpio.c b/drivers/leds/simple/simatic-ipc-leds-gpio.c
new file mode 100644
index 000000000000..4c9e663a90ba
--- /dev/null
+++ b/drivers/leds/simple/simatic-ipc-leds-gpio.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Siemens SIMATIC IPC driver for GPIO based LEDs
+ *
+ * Copyright (c) Siemens AG, 2022
+ *
+ * Authors:
+ * Henning Schild <henning.schild@siemens.com>
+ */
+
+#include <linux/gpio/machine.h>
+#include <linux/gpio/consumer.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+static struct gpiod_lookup_table simatic_ipc_led_gpio_table = {
+ .dev_id = "leds-gpio",
+ .table = {
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 0, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 1, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 2, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 3, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 4, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 5, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, GPIO_ACTIVE_LOW),
+ GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, GPIO_ACTIVE_HIGH),
+ },
+};
+
+static const struct gpio_led simatic_ipc_gpio_leds[] = {
+ { .name = "green:" LED_FUNCTION_STATUS "-3" },
+ { .name = "red:" LED_FUNCTION_STATUS "-1" },
+ { .name = "green:" LED_FUNCTION_STATUS "-1" },
+ { .name = "red:" LED_FUNCTION_STATUS "-2" },
+ { .name = "green:" LED_FUNCTION_STATUS "-2" },
+ { .name = "red:" LED_FUNCTION_STATUS "-3" },
+};
+
+static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
+ .num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds),
+ .leds = simatic_ipc_gpio_leds,
+};
+
+static struct platform_device *simatic_leds_pdev;
+
+static int simatic_ipc_leds_gpio_remove(struct platform_device *pdev)
+{
+ gpiod_remove_lookup_table(&simatic_ipc_led_gpio_table);
+ platform_device_unregister(simatic_leds_pdev);
+
+ return 0;
+}
+
+static int simatic_ipc_leds_gpio_probe(struct platform_device *pdev)
+{
+ struct gpio_desc *gpiod;
+ int err;
+
+ gpiod_add_lookup_table(&simatic_ipc_led_gpio_table);
+ simatic_leds_pdev = platform_device_register_resndata(NULL,
+ "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
+ &simatic_ipc_gpio_leds_pdata,
+ sizeof(simatic_ipc_gpio_leds_pdata));
+ if (IS_ERR(simatic_leds_pdev)) {
+ err = PTR_ERR(simatic_leds_pdev);
+ goto out;
+ }
+
+ /* PM_BIOS_BOOT_N */
+ gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 6, GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod)) {
+ err = PTR_ERR(gpiod);
+ goto out;
+ }
+ gpiod_put(gpiod);
+
+ /* PM_WDT_OUT */
+ gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 7, GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod)) {
+ err = PTR_ERR(gpiod);
+ goto out;
+ }
+ gpiod_put(gpiod);
+
+ return 0;
+out:
+ simatic_ipc_leds_gpio_remove(pdev);
+
+ return err;
+}
+
+static struct platform_driver simatic_ipc_led_gpio_driver = {
+ .probe = simatic_ipc_leds_gpio_probe,
+ .remove = simatic_ipc_leds_gpio_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ }
+};
+module_platform_driver(simatic_ipc_led_gpio_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
+MODULE_SOFTDEP("pre: platform:leds-gpio");
+MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
diff --git a/drivers/leds/simple/simatic-ipc-leds.c b/drivers/leds/simple/simatic-ipc-leds.c
index 078d43f5ba38..4894c228c165 100644
--- a/drivers/leds/simple/simatic-ipc-leds.c
+++ b/drivers/leds/simple/simatic-ipc-leds.c
@@ -23,7 +23,7 @@
#define SIMATIC_IPC_LED_PORT_BASE 0x404E
struct simatic_ipc_led {
- unsigned int value; /* mask for io and offset for mem */
+ unsigned int value; /* mask for io */
char *name;
struct led_classdev cdev;
};
@@ -38,21 +38,6 @@ static struct simatic_ipc_led simatic_ipc_leds_io[] = {
{ }
};
-/* the actual start will be discovered with PCI, 0 is a placeholder */
-static struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, SZ_4K, KBUILD_MODNAME);
-
-static void __iomem *simatic_ipc_led_memory;
-
-static struct simatic_ipc_led simatic_ipc_leds_mem[] = {
- {0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"},
- {0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"},
- {0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"},
- {0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"},
- {0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"},
- {0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"},
- { }
-};
-
static struct resource simatic_ipc_led_io_res =
DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME);
@@ -88,28 +73,6 @@ static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd)
return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness;
}
-static void simatic_ipc_led_set_mem(struct led_classdev *led_cd,
- enum led_brightness brightness)
-{
- struct simatic_ipc_led *led = cdev_to_led(led_cd);
- void __iomem *reg = simatic_ipc_led_memory + led->value;
- u32 val;
-
- val = readl(reg);
- val = (val & ~1) | (brightness == LED_OFF);
- writel(val, reg);
-}
-
-static enum led_brightness simatic_ipc_led_get_mem(struct led_classdev *led_cd)
-{
- struct simatic_ipc_led *led = cdev_to_led(led_cd);
- void __iomem *reg = simatic_ipc_led_memory + led->value;
- u32 val;
-
- val = readl(reg);
- return (val & 1) ? LED_OFF : led_cd->max_brightness;
-}
-
static int simatic_ipc_leds_probe(struct platform_device *pdev)
{
const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
@@ -117,9 +80,7 @@ static int simatic_ipc_leds_probe(struct platform_device *pdev)
struct simatic_ipc_led *ipcled;
struct led_classdev *cdev;
struct resource *res;
- void __iomem *reg;
- int err, type;
- u32 val;
+ int err;
switch (plat->devmode) {
case SIMATIC_IPC_DEVICE_227D:
@@ -134,52 +95,19 @@ static int simatic_ipc_leds_probe(struct platform_device *pdev)
}
ipcled = simatic_ipc_leds_io;
}
- type = IORESOURCE_IO;
if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) {
dev_err(dev, "Unable to register IO resource at %pR\n", res);
return -EBUSY;
}
break;
- case SIMATIC_IPC_DEVICE_127E:
- res = &simatic_ipc_led_mem_res;
- ipcled = simatic_ipc_leds_mem;
- type = IORESOURCE_MEM;
-
- /* get GPIO base from PCI */
- res->start = simatic_ipc_get_membase0(PCI_DEVFN(13, 0));
- if (res->start == 0)
- return -ENODEV;
-
- /* do the final address calculation */
- res->start = res->start + (0xC5 << 16);
- res->end += res->start;
-
- simatic_ipc_led_memory = devm_ioremap_resource(dev, res);
- if (IS_ERR(simatic_ipc_led_memory))
- return PTR_ERR(simatic_ipc_led_memory);
-
- /* initialize power/watchdog LED */
- reg = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */
- val = readl(reg);
- writel(val & ~1, reg);
-
- reg = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */
- val = readl(reg);
- writel(val | 1, reg);
- break;
default:
return -ENODEV;
}
while (ipcled->value) {
cdev = &ipcled->cdev;
- if (type == IORESOURCE_MEM) {
- cdev->brightness_set = simatic_ipc_led_set_mem;
- cdev->brightness_get = simatic_ipc_led_get_mem;
- } else {
- cdev->brightness_set = simatic_ipc_led_set_io;
- cdev->brightness_get = simatic_ipc_led_get_io;
- }
+ cdev->brightness_set = simatic_ipc_led_set_io;
+ cdev->brightness_get = simatic_ipc_led_get_io;
cdev->max_brightness = LED_ON;
cdev->name = ipcled->name;
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3b59456f5545..9566341de470 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -572,6 +572,7 @@ config LPC_ICH
tristate "Intel ICH LPC"
depends on PCI
select MFD_CORE
+ select P2SB if X86
help
The LPC bridge function of the Intel ICH provides support for
many functional units. This driver provides needed support for
diff --git a/drivers/mfd/bcm2835-pm.c b/drivers/mfd/bcm2835-pm.c
index 42fe67f1538e..49cd1f03884a 100644
--- a/drivers/mfd/bcm2835-pm.c
+++ b/drivers/mfd/bcm2835-pm.c
@@ -25,9 +25,52 @@ static const struct mfd_cell bcm2835_power_devs[] = {
{ .name = "bcm2835-power" },
};
+static int bcm2835_pm_get_pdata(struct platform_device *pdev,
+ struct bcm2835_pm *pm)
+{
+ if (of_find_property(pm->dev->of_node, "reg-names", NULL)) {
+ struct resource *res;
+
+ pm->base = devm_platform_ioremap_resource_byname(pdev, "pm");
+ if (IS_ERR(pm->base))
+ return PTR_ERR(pm->base);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "asb");
+ if (res) {
+ pm->asb = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pm->asb))
+ pm->asb = NULL;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "rpivid_asb");
+ if (res) {
+ pm->rpivid_asb = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pm->rpivid_asb))
+ pm->rpivid_asb = NULL;
+ }
+
+ return 0;
+ }
+
+ /* If no 'reg-names' property is found we can assume we're using old DTB. */
+ pm->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pm->base))
+ return PTR_ERR(pm->base);
+
+ pm->asb = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(pm->asb))
+ pm->asb = NULL;
+
+ pm->rpivid_asb = devm_platform_ioremap_resource(pdev, 2);
+ if (IS_ERR(pm->rpivid_asb))
+ pm->rpivid_asb = NULL;
+
+ return 0;
+}
+
static int bcm2835_pm_probe(struct platform_device *pdev)
{
- struct resource *res;
struct device *dev = &pdev->dev;
struct bcm2835_pm *pm;
int ret;
@@ -39,10 +82,9 @@ static int bcm2835_pm_probe(struct platform_device *pdev)
pm->dev = dev;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pm->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(pm->base))
- return PTR_ERR(pm->base);
+ ret = bcm2835_pm_get_pdata(pdev, pm);
+ if (ret)
+ return ret;
ret = devm_mfd_add_devices(dev, -1,
bcm2835_pm_devs, ARRAY_SIZE(bcm2835_pm_devs),
@@ -50,30 +92,22 @@ static int bcm2835_pm_probe(struct platform_device *pdev)
if (ret)
return ret;
- /* We'll use the presence of the AXI ASB regs in the
+ /*
+ * We'll use the presence of the AXI ASB regs in the
* bcm2835-pm binding as the key for whether we can reference
* the full PM register range and support power domains.
*/
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (res) {
- pm->asb = devm_ioremap_resource(dev, res);
- if (IS_ERR(pm->asb))
- return PTR_ERR(pm->asb);
-
- ret = devm_mfd_add_devices(dev, -1,
- bcm2835_power_devs,
- ARRAY_SIZE(bcm2835_power_devs),
- NULL, 0, NULL);
- if (ret)
- return ret;
- }
-
+ if (pm->asb)
+ return devm_mfd_add_devices(dev, -1, bcm2835_power_devs,
+ ARRAY_SIZE(bcm2835_power_devs),
+ NULL, 0, NULL);
return 0;
}
static const struct of_device_id bcm2835_pm_of_match[] = {
{ .compatible = "brcm,bcm2835-pm-wdt", },
{ .compatible = "brcm,bcm2835-pm", },
+ { .compatible = "brcm,bcm2711-pm", },
{},
};
MODULE_DEVICE_TABLE(of, bcm2835_pm_of_match);
diff --git a/drivers/mfd/lpc_ich.c b/drivers/mfd/lpc_ich.c
index 9ffab9aafd81..650951f89f1c 100644
--- a/drivers/mfd/lpc_ich.c
+++ b/drivers/mfd/lpc_ich.c
@@ -8,7 +8,8 @@
* Configuration Registers.
*
* This driver is derived from lpc_sch.
-
+ *
+ * Copyright (c) 2017, 2021-2022 Intel Corporation
* Copyright (c) 2011 Extreme Engineering Solution, Inc.
* Author: Aaron Sierra <asierra@xes-inc.com>
*
@@ -42,9 +43,11 @@
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/pci.h>
+#include <linux/pinctrl/pinctrl.h>
#include <linux/mfd/core.h>
#include <linux/mfd/lpc_ich.h>
#include <linux/platform_data/itco_wdt.h>
+#include <linux/platform_data/x86/p2sb.h>
#define ACPIBASE 0x40
#define ACPIBASE_GPE_OFF 0x28
@@ -71,8 +74,6 @@
#define BCR 0xdc
#define BCR_WPD BIT(0)
-#define SPIBASE_APL_SZ 4096
-
#define GPIOBASE_ICH0 0x58
#define GPIOCTRL_ICH0 0x5C
#define GPIOBASE_ICH6 0x48
@@ -143,6 +144,73 @@ static struct mfd_cell lpc_ich_gpio_cell = {
.ignore_resource_conflicts = true,
};
+#define APL_GPIO_NORTH 0
+#define APL_GPIO_NORTHWEST 1
+#define APL_GPIO_WEST 2
+#define APL_GPIO_SOUTHWEST 3
+#define APL_GPIO_NR_DEVICES 4
+
+/* Offset data for Apollo Lake GPIO controllers */
+static resource_size_t apl_gpio_offsets[APL_GPIO_NR_DEVICES] = {
+ [APL_GPIO_NORTH] = 0xc50000,
+ [APL_GPIO_NORTHWEST] = 0xc40000,
+ [APL_GPIO_WEST] = 0xc70000,
+ [APL_GPIO_SOUTHWEST] = 0xc00000,
+};
+
+#define APL_GPIO_RESOURCE_SIZE 0x1000
+
+#define APL_GPIO_IRQ 14
+
+static struct resource apl_gpio_resources[APL_GPIO_NR_DEVICES][2] = {
+ [APL_GPIO_NORTH] = {
+ DEFINE_RES_MEM(0, 0),
+ DEFINE_RES_IRQ(APL_GPIO_IRQ),
+ },
+ [APL_GPIO_NORTHWEST] = {
+ DEFINE_RES_MEM(0, 0),
+ DEFINE_RES_IRQ(APL_GPIO_IRQ),
+ },
+ [APL_GPIO_WEST] = {
+ DEFINE_RES_MEM(0, 0),
+ DEFINE_RES_IRQ(APL_GPIO_IRQ),
+ },
+ [APL_GPIO_SOUTHWEST] = {
+ DEFINE_RES_MEM(0, 0),
+ DEFINE_RES_IRQ(APL_GPIO_IRQ),
+ },
+};
+
+static const struct mfd_cell apl_gpio_devices[APL_GPIO_NR_DEVICES] = {
+ [APL_GPIO_NORTH] = {
+ .name = "apollolake-pinctrl",
+ .id = APL_GPIO_NORTH,
+ .num_resources = ARRAY_SIZE(apl_gpio_resources[APL_GPIO_NORTH]),
+ .resources = apl_gpio_resources[APL_GPIO_NORTH],
+ .ignore_resource_conflicts = true,
+ },
+ [APL_GPIO_NORTHWEST] = {
+ .name = "apollolake-pinctrl",
+ .id = APL_GPIO_NORTHWEST,
+ .num_resources = ARRAY_SIZE(apl_gpio_resources[APL_GPIO_NORTHWEST]),
+ .resources = apl_gpio_resources[APL_GPIO_NORTHWEST],
+ .ignore_resource_conflicts = true,
+ },
+ [APL_GPIO_WEST] = {
+ .name = "apollolake-pinctrl",
+ .id = APL_GPIO_WEST,
+ .num_resources = ARRAY_SIZE(apl_gpio_resources[APL_GPIO_WEST]),
+ .resources = apl_gpio_resources[APL_GPIO_WEST],
+ .ignore_resource_conflicts = true,
+ },
+ [APL_GPIO_SOUTHWEST] = {
+ .name = "apollolake-pinctrl",
+ .id = APL_GPIO_SOUTHWEST,
+ .num_resources = ARRAY_SIZE(apl_gpio_resources[APL_GPIO_SOUTHWEST]),
+ .resources = apl_gpio_resources[APL_GPIO_SOUTHWEST],
+ .ignore_resource_conflicts = true,
+ },
+};
static struct mfd_cell lpc_ich_spi_cell = {
.name = "intel-spi",
@@ -1086,6 +1154,34 @@ wdt_done:
return ret;
}
+static int lpc_ich_init_pinctrl(struct pci_dev *dev)
+{
+ struct resource base;
+ unsigned int i;
+ int ret;
+
+ /* Check, if GPIO has been exported as an ACPI device */
+ if (acpi_dev_present("INT3452", NULL, -1))
+ return -EEXIST;
+
+ ret = p2sb_bar(dev->bus, 0, &base);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(apl_gpio_devices); i++) {
+ struct resource *mem = &apl_gpio_resources[i][0];
+ resource_size_t offset = apl_gpio_offsets[i];
+
+ /* Fill MEM resource */
+ mem->start = base.start + offset;
+ mem->end = base.start + offset + APL_GPIO_RESOURCE_SIZE - 1;
+ mem->flags = base.flags;
+ }
+
+ return mfd_add_devices(&dev->dev, 0, apl_gpio_devices,
+ ARRAY_SIZE(apl_gpio_devices), NULL, 0, NULL);
+}
+
static bool lpc_ich_byt_set_writeable(void __iomem *base, void *data)
{
u32 val;
@@ -1100,35 +1196,32 @@ static bool lpc_ich_byt_set_writeable(void __iomem *base, void *data)
return val & BYT_BCR_WPD;
}
-static bool lpc_ich_lpt_set_writeable(void __iomem *base, void *data)
+static bool lpc_ich_set_writeable(struct pci_bus *bus, unsigned int devfn)
{
- struct pci_dev *pdev = data;
u32 bcr;
- pci_read_config_dword(pdev, BCR, &bcr);
+ pci_bus_read_config_dword(bus, devfn, BCR, &bcr);
if (!(bcr & BCR_WPD)) {
bcr |= BCR_WPD;
- pci_write_config_dword(pdev, BCR, bcr);
- pci_read_config_dword(pdev, BCR, &bcr);
+ pci_bus_write_config_dword(bus, devfn, BCR, bcr);
+ pci_bus_read_config_dword(bus, devfn, BCR, &bcr);
}
return bcr & BCR_WPD;
}
-static bool lpc_ich_bxt_set_writeable(void __iomem *base, void *data)
+static bool lpc_ich_lpt_set_writeable(void __iomem *base, void *data)
{
- unsigned int spi = PCI_DEVFN(13, 2);
- struct pci_bus *bus = data;
- u32 bcr;
+ struct pci_dev *pdev = data;
- pci_bus_read_config_dword(bus, spi, BCR, &bcr);
- if (!(bcr & BCR_WPD)) {
- bcr |= BCR_WPD;
- pci_bus_write_config_dword(bus, spi, BCR, bcr);
- pci_bus_read_config_dword(bus, spi, BCR, &bcr);
- }
+ return lpc_ich_set_writeable(pdev->bus, pdev->devfn);
+}
- return bcr & BCR_WPD;
+static bool lpc_ich_bxt_set_writeable(void __iomem *base, void *data)
+{
+ struct pci_dev *pdev = data;
+
+ return lpc_ich_set_writeable(pdev->bus, PCI_DEVFN(13, 2));
}
static int lpc_ich_init_spi(struct pci_dev *dev)
@@ -1137,6 +1230,7 @@ static int lpc_ich_init_spi(struct pci_dev *dev)
struct resource *res = &intel_spi_res[0];
struct intel_spi_boardinfo *info;
u32 spi_base, rcba;
+ int ret;
info = devm_kzalloc(&dev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
@@ -1167,30 +1261,19 @@ static int lpc_ich_init_spi(struct pci_dev *dev)
}
break;
- case INTEL_SPI_BXT: {
- unsigned int p2sb = PCI_DEVFN(13, 0);
- unsigned int spi = PCI_DEVFN(13, 2);
- struct pci_bus *bus = dev->bus;
-
+ case INTEL_SPI_BXT:
/*
* The P2SB is hidden by BIOS and we need to unhide it in
* order to read BAR of the SPI flash device. Once that is
* done we hide it again.
*/
- pci_bus_write_config_byte(bus, p2sb, 0xe1, 0x0);
- pci_bus_read_config_dword(bus, spi, PCI_BASE_ADDRESS_0,
- &spi_base);
- if (spi_base != ~0) {
- res->start = spi_base & 0xfffffff0;
- res->end = res->start + SPIBASE_APL_SZ - 1;
-
- info->set_writeable = lpc_ich_bxt_set_writeable;
- info->data = bus;
- }
+ ret = p2sb_bar(dev->bus, PCI_DEVFN(13, 2), res);
+ if (ret)
+ return ret;
- pci_bus_write_config_byte(bus, p2sb, 0xe1, 0x1);
+ info->set_writeable = lpc_ich_bxt_set_writeable;
+ info->data = dev;
break;
- }
default:
return -EINVAL;
@@ -1249,6 +1332,12 @@ static int lpc_ich_probe(struct pci_dev *dev,
cell_added = true;
}
+ if (priv->chipset == LPC_APL) {
+ ret = lpc_ich_init_pinctrl(dev);
+ if (!ret)
+ cell_added = true;
+ }
+
if (lpc_chipset_info[priv->chipset].spi_type) {
ret = lpc_ich_init_spi(dev);
if (!ret)
diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c
index ffc045f7bf00..fd093e36c3a8 100644
--- a/drivers/pinctrl/intel/pinctrl-intel.c
+++ b/drivers/pinctrl/intel/pinctrl-intel.c
@@ -1641,16 +1641,14 @@ EXPORT_SYMBOL_GPL(intel_pinctrl_probe_by_uid);
const struct intel_pinctrl_soc_data *intel_pinctrl_get_soc_data(struct platform_device *pdev)
{
+ const struct intel_pinctrl_soc_data * const *table;
const struct intel_pinctrl_soc_data *data = NULL;
- const struct intel_pinctrl_soc_data **table;
- struct acpi_device *adev;
- unsigned int i;
- adev = ACPI_COMPANION(&pdev->dev);
- if (adev) {
- const void *match = device_get_match_data(&pdev->dev);
+ table = device_get_match_data(&pdev->dev);
+ if (table) {
+ struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
+ unsigned int i;
- table = (const struct intel_pinctrl_soc_data **)match;
for (i = 0; table[i]; i++) {
if (!strcmp(adev->pnp.unique_id, table[i]->uid)) {
data = table[i];
@@ -1664,7 +1662,7 @@ const struct intel_pinctrl_soc_data *intel_pinctrl_get_soc_data(struct platform_
if (!id)
return ERR_PTR(-ENODEV);
- table = (const struct intel_pinctrl_soc_data **)id->driver_data;
+ table = (const struct intel_pinctrl_soc_data * const *)id->driver_data;
data = table[pdev->id];
}
diff --git a/drivers/platform/x86/intel/Kconfig b/drivers/platform/x86/intel/Kconfig
index 794968bda115..c9cfbaae436b 100644
--- a/drivers/platform/x86/intel/Kconfig
+++ b/drivers/platform/x86/intel/Kconfig
@@ -70,6 +70,18 @@ config INTEL_OAKTRAIL
enable/disable the Camera, WiFi, BT etc. devices. If in doubt, say Y
here; it will only load on supported platforms.
+config P2SB
+ bool "Primary to Sideband (P2SB) bridge access support"
+ depends on PCI
+ help
+ The Primary to Sideband (P2SB) bridge is an interface to some
+ PCI devices connected through it. In particular, SPI NOR controller
+ in Intel Apollo Lake SoC is one of such devices.
+
+ The main purpose of this library is to unhide P2SB device in case
+ firmware kept it hidden on some platforms in order to access devices
+ behind it.
+
config INTEL_BXTWC_PMIC_TMU
tristate "Intel Broxton Whiskey Cove TMU Driver"
depends on INTEL_SOC_PMIC_BXTWC
diff --git a/drivers/platform/x86/intel/Makefile b/drivers/platform/x86/intel/Makefile
index 717933dd0cfd..741a9404db98 100644
--- a/drivers/platform/x86/intel/Makefile
+++ b/drivers/platform/x86/intel/Makefile
@@ -28,6 +28,8 @@ intel_int0002_vgpio-y := int0002_vgpio.o
obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
intel_oaktrail-y := oaktrail.o
obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o
+intel_p2sb-y := p2sb.o
+obj-$(CONFIG_P2SB) += intel_p2sb.o
intel_sdsi-y := sdsi.o
obj-$(CONFIG_INTEL_SDSI) += intel_sdsi.o
intel_vsec-y := vsec.o
diff --git a/drivers/platform/x86/intel/p2sb.c b/drivers/platform/x86/intel/p2sb.c
new file mode 100644
index 000000000000..fb2e141f3eb8
--- /dev/null
+++ b/drivers/platform/x86/intel/p2sb.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Primary to Sideband (P2SB) bridge access support
+ *
+ * Copyright (c) 2017, 2021-2022 Intel Corporation.
+ *
+ * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ * Jonathan Yong <jonathan.yong@intel.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/export.h>
+#include <linux/pci.h>
+#include <linux/platform_data/x86/p2sb.h>
+
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+
+#define P2SBC 0xe0
+#define P2SBC_HIDE BIT(8)
+
+static const struct x86_cpu_id p2sb_cpu_ids[] = {
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, PCI_DEVFN(13, 0)),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT_D, PCI_DEVFN(31, 1)),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT_D, PCI_DEVFN(31, 1)),
+ X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE, PCI_DEVFN(31, 1)),
+ X86_MATCH_INTEL_FAM6_MODEL(KABYLAKE_L, PCI_DEVFN(31, 1)),
+ X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE, PCI_DEVFN(31, 1)),
+ X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_L, PCI_DEVFN(31, 1)),
+ {}
+};
+
+static int p2sb_get_devfn(unsigned int *devfn)
+{
+ const struct x86_cpu_id *id;
+
+ id = x86_match_cpu(p2sb_cpu_ids);
+ if (!id)
+ return -ENODEV;
+
+ *devfn = (unsigned int)id->driver_data;
+ return 0;
+}
+
+static int p2sb_read_bar0(struct pci_dev *pdev, struct resource *mem)
+{
+ /* Copy resource from the first BAR of the device in question */
+ *mem = pdev->resource[0];
+ return 0;
+}
+
+static int p2sb_scan_and_read(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
+{
+ struct pci_dev *pdev;
+ int ret;
+
+ pdev = pci_scan_single_device(bus, devfn);
+ if (!pdev)
+ return -ENODEV;
+
+ ret = p2sb_read_bar0(pdev, mem);
+
+ pci_stop_and_remove_bus_device(pdev);
+ return ret;
+}
+
+/**
+ * p2sb_bar - Get Primary to Sideband (P2SB) bridge device BAR
+ * @bus: PCI bus to communicate with
+ * @devfn: PCI slot and function to communicate with
+ * @mem: memory resource to be filled in
+ *
+ * The BIOS prevents the P2SB device from being enumerated by the PCI
+ * subsystem, so we need to unhide and hide it back to lookup the BAR.
+ *
+ * if @bus is NULL, the bus 0 in domain 0 will be used.
+ * If @devfn is 0, it will be replaced by devfn of the P2SB device.
+ *
+ * Caller must provide a valid pointer to @mem.
+ *
+ * Locking is handled by pci_rescan_remove_lock mutex.
+ *
+ * Return:
+ * 0 on success or appropriate errno value on error.
+ */
+int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
+{
+ struct pci_dev *pdev_p2sb;
+ unsigned int devfn_p2sb;
+ u32 value = P2SBC_HIDE;
+ int ret;
+
+ /* Get devfn for P2SB device itself */
+ ret = p2sb_get_devfn(&devfn_p2sb);
+ if (ret)
+ return ret;
+
+ /* if @bus is NULL, use bus 0 in domain 0 */
+ bus = bus ?: pci_find_bus(0, 0);
+
+ /*
+ * Prevent concurrent PCI bus scan from seeing the P2SB device and
+ * removing via sysfs while it is temporarily exposed.
+ */
+ pci_lock_rescan_remove();
+
+ /* Unhide the P2SB device, if needed */
+ pci_bus_read_config_dword(bus, devfn_p2sb, P2SBC, &value);
+ if (value & P2SBC_HIDE)
+ pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, 0);
+
+ pdev_p2sb = pci_scan_single_device(bus, devfn_p2sb);
+ if (devfn)
+ ret = p2sb_scan_and_read(bus, devfn, mem);
+ else
+ ret = p2sb_read_bar0(pdev_p2sb, mem);
+ pci_stop_and_remove_bus_device(pdev_p2sb);
+
+ /* Hide the P2SB device, if it was hidden */
+ if (value & P2SBC_HIDE)
+ pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, P2SBC_HIDE);
+
+ pci_unlock_rescan_remove();
+
+ if (ret)
+ return ret;
+
+ if (mem->flags == 0)
+ return -ENODEV;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(p2sb_bar);
diff --git a/drivers/platform/x86/simatic-ipc.c b/drivers/platform/x86/simatic-ipc.c
index b599cda5ba3c..ca3647b751d5 100644
--- a/drivers/platform/x86/simatic-ipc.c
+++ b/drivers/platform/x86/simatic-ipc.c
@@ -51,6 +51,7 @@ static int register_platform_devices(u32 station_id)
{
u8 ledmode = SIMATIC_IPC_DEVICE_NONE;
u8 wdtmode = SIMATIC_IPC_DEVICE_NONE;
+ char *pdevname = KBUILD_MODNAME "_leds";
int i;
platform_data.devmode = SIMATIC_IPC_DEVICE_NONE;
@@ -64,10 +65,12 @@ static int register_platform_devices(u32 station_id)
}
if (ledmode != SIMATIC_IPC_DEVICE_NONE) {
+ if (ledmode == SIMATIC_IPC_DEVICE_127E)
+ pdevname = KBUILD_MODNAME "_leds_gpio";
platform_data.devmode = ledmode;
ipc_led_platform_device =
platform_device_register_data(NULL,
- KBUILD_MODNAME "_leds", PLATFORM_DEVID_NONE,
+ pdevname, PLATFORM_DEVID_NONE,
&platform_data,
sizeof(struct simatic_ipc_platform));
if (IS_ERR(ipc_led_platform_device))
@@ -101,44 +104,6 @@ static int register_platform_devices(u32 station_id)
return 0;
}
-/* FIXME: this should eventually be done with generic P2SB discovery code
- * the individual drivers for watchdogs and LEDs access memory that implements
- * GPIO, but pinctrl will not come up because of missing ACPI entries
- *
- * While there is no conflict a cleaner solution would be to somehow bring up
- * pinctrl even with these ACPI entries missing, and base the drivers on pinctrl.
- * After which the following function could be dropped, together with the code
- * poking the memory.
- */
-/*
- * Get membase address from PCI, used in leds and wdt module. Here we read
- * the bar0. The final address calculation is done in the appropriate modules
- */
-u32 simatic_ipc_get_membase0(unsigned int p2sb)
-{
- struct pci_bus *bus;
- u32 bar0 = 0;
- /*
- * The GPIO memory is in bar0 of the hidden P2SB device.
- * Unhide the device to have a quick look at it, before we hide it
- * again.
- * Also grab the pci rescan lock so that device does not get discovered
- * and remapped while it is visible.
- * This code is inspired by drivers/mfd/lpc_ich.c
- */
- bus = pci_find_bus(0, 0);
- pci_lock_rescan_remove();
- pci_bus_write_config_byte(bus, p2sb, 0xE1, 0x0);
- pci_bus_read_config_dword(bus, p2sb, PCI_BASE_ADDRESS_0, &bar0);
-
- bar0 &= ~0xf;
- pci_bus_write_config_byte(bus, p2sb, 0xE1, 0x1);
- pci_unlock_rescan_remove();
-
- return bar0;
-}
-EXPORT_SYMBOL(simatic_ipc_get_membase0);
-
static int __init simatic_ipc_init_module(void)
{
const struct dmi_system_id *match;
diff --git a/drivers/soc/bcm/bcm2835-power.c b/drivers/soc/bcm/bcm2835-power.c
index 1e0041ec8132..5bcd047768b6 100644
--- a/drivers/soc/bcm/bcm2835-power.c
+++ b/drivers/soc/bcm/bcm2835-power.c
@@ -126,8 +126,7 @@
#define ASB_AXI_BRDG_ID 0x20
-#define ASB_READ(reg) readl(power->asb + (reg))
-#define ASB_WRITE(reg, val) writel(PM_PASSWORD | (val), power->asb + (reg))
+#define BCM2835_BRDG_ID 0x62726467
struct bcm2835_power_domain {
struct generic_pm_domain base;
@@ -142,24 +141,41 @@ struct bcm2835_power {
void __iomem *base;
/* AXI Async bridge registers. */
void __iomem *asb;
+ /* RPiVid bridge registers. */
+ void __iomem *rpivid_asb;
struct genpd_onecell_data pd_xlate;
struct bcm2835_power_domain domains[BCM2835_POWER_DOMAIN_COUNT];
struct reset_controller_dev reset;
};
-static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
+static int bcm2835_asb_control(struct bcm2835_power *power, u32 reg, bool enable)
{
+ void __iomem *base = power->asb;
u64 start;
+ u32 val;
- if (!reg)
+ switch (reg) {
+ case 0:
return 0;
+ case ASB_V3D_S_CTRL:
+ case ASB_V3D_M_CTRL:
+ if (power->rpivid_asb)
+ base = power->rpivid_asb;
+ break;
+ }
start = ktime_get_ns();
/* Enable the module's async AXI bridges. */
- ASB_WRITE(reg, ASB_READ(reg) & ~ASB_REQ_STOP);
- while (ASB_READ(reg) & ASB_ACK) {
+ if (enable) {
+ val = readl(base + reg) & ~ASB_REQ_STOP;
+ } else {
+ val = readl(base + reg) | ASB_REQ_STOP;
+ }
+ writel(PM_PASSWORD | val, base + reg);
+
+ while (readl(base + reg) & ASB_ACK) {
cpu_relax();
if (ktime_get_ns() - start >= 1000)
return -ETIMEDOUT;
@@ -168,30 +184,24 @@ static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
return 0;
}
-static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg)
+static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg)
{
- u64 start;
-
- if (!reg)
- return 0;
-
- start = ktime_get_ns();
-
- /* Enable the module's async AXI bridges. */
- ASB_WRITE(reg, ASB_READ(reg) | ASB_REQ_STOP);
- while (!(ASB_READ(reg) & ASB_ACK)) {
- cpu_relax();
- if (ktime_get_ns() - start >= 1000)
- return -ETIMEDOUT;
- }
+ return bcm2835_asb_control(power, reg, true);
+}
- return 0;
+static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg)
+{
+ return bcm2835_asb_control(power, reg, false);
}
static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg)
{
struct bcm2835_power *power = pd->power;
+ /* We don't run this on BCM2711 */
+ if (power->rpivid_asb)
+ return 0;
+
/* Enable functional isolation */
PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC);
@@ -213,6 +223,10 @@ static int bcm2835_power_power_on(struct bcm2835_power_domain *pd, u32 pm_reg)
int inrush;
bool powok;
+ /* We don't run this on BCM2711 */
+ if (power->rpivid_asb)
+ return 0;
+
/* If it was already powered on by the fw, leave it that way. */
if (PM_READ(pm_reg) & PM_POWUP)
return 0;
@@ -626,13 +640,23 @@ static int bcm2835_power_probe(struct platform_device *pdev)
power->dev = dev;
power->base = pm->base;
power->asb = pm->asb;
+ power->rpivid_asb = pm->rpivid_asb;
- id = ASB_READ(ASB_AXI_BRDG_ID);
- if (id != 0x62726467 /* "BRDG" */) {
+ id = readl(power->asb + ASB_AXI_BRDG_ID);
+ if (id != BCM2835_BRDG_ID /* "BRDG" */) {
dev_err(dev, "ASB register ID returned 0x%08x\n", id);
return -ENODEV;
}
+ if (power->rpivid_asb) {
+ id = readl(power->rpivid_asb + ASB_AXI_BRDG_ID);
+ if (id != BCM2835_BRDG_ID /* "BRDG" */) {
+ dev_err(dev, "RPiVid ASB register ID returned 0x%08x\n",
+ id);
+ return -ENODEV;
+ }
+ }
+
power->pd_xlate.domains = devm_kcalloc(dev,
ARRAY_SIZE(power_domain_names),
sizeof(*power->pd_xlate.domains),
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 32fd37698932..0796f6a9e8ff 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1647,6 +1647,7 @@ config SIEMENS_SIMATIC_IPC_WDT
tristate "Siemens Simatic IPC Watchdog"
depends on SIEMENS_SIMATIC_IPC
select WATCHDOG_CORE
+ select P2SB
help
This driver adds support for several watchdogs found in Industrial
PCs from Siemens.
diff --git a/drivers/watchdog/simatic-ipc-wdt.c b/drivers/watchdog/simatic-ipc-wdt.c
index 8bac793c63fb..6599695dc672 100644
--- a/drivers/watchdog/simatic-ipc-wdt.c
+++ b/drivers/watchdog/simatic-ipc-wdt.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/platform_data/x86/p2sb.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>
#include <linux/platform_device.h>
#include <linux/sizes.h>
@@ -54,9 +55,9 @@ static struct resource io_resource_trigger =
DEFINE_RES_IO_NAMED(WD_TRIGGER_IOADR, SZ_1,
KBUILD_MODNAME " WD_TRIGGER_IOADR");
-/* the actual start will be discovered with pci, 0 is a placeholder */
+/* the actual start will be discovered with p2sb, 0 is a placeholder */
static struct resource mem_resource =
- DEFINE_RES_MEM_NAMED(0, SZ_4, "WD_RESET_BASE_ADR");
+ DEFINE_RES_MEM_NAMED(0, 0, "WD_RESET_BASE_ADR");
static u32 wd_timeout_table[] = {2, 4, 6, 8, 16, 32, 48, 64 };
static void __iomem *wd_reset_base_addr;
@@ -150,6 +151,7 @@ static int simatic_ipc_wdt_probe(struct platform_device *pdev)
struct simatic_ipc_platform *plat = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct resource *res;
+ int ret;
switch (plat->devmode) {
case SIMATIC_IPC_DEVICE_227E:
@@ -190,15 +192,14 @@ static int simatic_ipc_wdt_probe(struct platform_device *pdev)
if (plat->devmode == SIMATIC_IPC_DEVICE_427E) {
res = &mem_resource;
- /* get GPIO base from PCI */
- res->start = simatic_ipc_get_membase0(PCI_DEVFN(0x1f, 1));
- if (res->start == 0)
- return -ENODEV;
+ ret = p2sb_bar(NULL, 0, res);
+ if (ret)
+ return ret;
/* do the final address calculation */
res->start = res->start + (GPIO_COMMUNITY0_PORT_ID << 16) +
PAD_CFG_DW0_GPP_A_23;
- res->end += res->start;
+ res->end = res->start + SZ_4 - 1;
wd_reset_base_addr = devm_ioremap_resource(dev, res);
if (IS_ERR(wd_reset_base_addr))
diff --git a/include/linux/mfd/bcm2835-pm.h b/include/linux/mfd/bcm2835-pm.h
index ed37dc40e82a..f70a810c55f7 100644
--- a/include/linux/mfd/bcm2835-pm.h
+++ b/include/linux/mfd/bcm2835-pm.h
@@ -9,6 +9,7 @@ struct bcm2835_pm {
struct device *dev;
void __iomem *base;
void __iomem *asb;
+ void __iomem *rpivid_asb;
};
#endif /* BCM2835_MFD_PM_H */
diff --git a/include/linux/platform_data/x86/p2sb.h b/include/linux/platform_data/x86/p2sb.h
new file mode 100644
index 000000000000..a1d5fddc8f13
--- /dev/null
+++ b/include/linux/platform_data/x86/p2sb.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Primary to Sideband (P2SB) bridge access support
+ */
+
+#ifndef _PLATFORM_DATA_X86_P2SB_H
+#define _PLATFORM_DATA_X86_P2SB_H
+
+#include <linux/errno.h>
+#include <linux/kconfig.h>
+
+struct pci_bus;
+struct resource;
+
+#if IS_BUILTIN(CONFIG_P2SB)
+
+int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem);
+
+#else /* CONFIG_P2SB */
+
+static inline int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
+{
+ return -ENODEV;
+}
+
+#endif /* CONFIG_P2SB is not set */
+
+#endif /* _PLATFORM_DATA_X86_P2SB_H */
diff --git a/include/linux/platform_data/x86/simatic-ipc-base.h b/include/linux/platform_data/x86/simatic-ipc-base.h
index 62d2bc774067..39fefd48cf4d 100644
--- a/include/linux/platform_data/x86/simatic-ipc-base.h
+++ b/include/linux/platform_data/x86/simatic-ipc-base.h
@@ -24,6 +24,4 @@ struct simatic_ipc_platform {
u8 devmode;
};
-u32 simatic_ipc_get_membase0(unsigned int p2sb);
-
#endif /* __PLATFORM_DATA_X86_SIMATIC_IPC_BASE_H */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-07 05:59:20 +0300