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Diffstat (limited to 'drivers/i2c/busses/i2c-i801.c')
-rw-r--r--drivers/i2c/busses/i2c-i801.c206
1 files changed, 192 insertions, 14 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index ac7f7817dc89..f2956936c3f2 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -64,12 +64,14 @@
* Cedar Fork (PCH) 0x18df 32 hard yes yes yes
* Ice Lake-LP (PCH) 0x34a3 32 hard yes yes yes
* Comet Lake (PCH) 0x02a3 32 hard yes yes yes
+ * Elkhart Lake (PCH) 0x4b23 32 hard yes yes yes
+ * Tiger Lake-LP (PCH) 0xa0a3 32 hard yes yes yes
*
* Features supported by this driver:
* Software PEC no
* Hardware PEC yes
* Block buffer yes
- * Block process call transaction no
+ * Block process call transaction yes
* I2C block read transaction yes (doesn't use the block buffer)
* Slave mode no
* SMBus Host Notify yes
@@ -92,6 +94,7 @@
#include <linux/io.h>
#include <linux/dmi.h>
#include <linux/slab.h>
+#include <linux/string.h>
#include <linux/wait.h>
#include <linux/err.h>
#include <linux/platform_device.h>
@@ -99,7 +102,7 @@
#include <linux/pm_runtime.h>
#if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
-#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/platform_data/i2c-mux-gpio.h>
#endif
@@ -169,6 +172,7 @@
#define I801_PROC_CALL 0x10 /* unimplemented */
#define I801_BLOCK_DATA 0x14
#define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */
+#define I801_BLOCK_PROC_CALL 0x1C
/* I801 Host Control register bits */
#define SMBHSTCNT_INTREN BIT(0)
@@ -200,6 +204,7 @@
STATUS_ERROR_FLAGS)
/* Older devices have their ID defined in <linux/pci_ids.h> */
+#define PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS 0x02a3
#define PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS 0x0f12
#define PCI_DEVICE_ID_INTEL_CDF_SMBUS 0x18df
#define PCI_DEVICE_ID_INTEL_DNV_SMBUS 0x19df
@@ -217,6 +222,7 @@
#define PCI_DEVICE_ID_INTEL_GEMINILAKE_SMBUS 0x31d4
#define PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS 0x34a3
#define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30
+#define PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS 0x4b23
#define PCI_DEVICE_ID_INTEL_BROXTON_SMBUS 0x5ad4
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22
#define PCI_DEVICE_ID_INTEL_WILDCATPOINT_SMBUS 0x8ca2
@@ -228,12 +234,12 @@
#define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS 0x9ca2
#define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_SMBUS 0x9d23
#define PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS 0x9da3
+#define PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS 0xa0a3
#define PCI_DEVICE_ID_INTEL_SUNRISEPOINT_H_SMBUS 0xa123
#define PCI_DEVICE_ID_INTEL_LEWISBURG_SMBUS 0xa1a3
#define PCI_DEVICE_ID_INTEL_LEWISBURG_SSKU_SMBUS 0xa223
#define PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS 0xa2a3
#define PCI_DEVICE_ID_INTEL_CANNONLAKE_H_SMBUS 0xa323
-#define PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS 0x02a3
struct i801_mux_config {
char *gpio_chip;
@@ -266,6 +272,7 @@ struct i801_priv {
#if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
const struct i801_mux_config *mux_drvdata;
struct platform_device *mux_pdev;
+ struct gpiod_lookup_table *lookup;
#endif
struct platform_device *tco_pdev;
@@ -509,10 +516,23 @@ static int i801_transaction(struct i801_priv *priv, int xact)
static int i801_block_transaction_by_block(struct i801_priv *priv,
union i2c_smbus_data *data,
- char read_write, int hwpec)
+ char read_write, int command,
+ int hwpec)
{
int i, len;
int status;
+ int xact = hwpec ? SMBHSTCNT_PEC_EN : 0;
+
+ switch (command) {
+ case I2C_SMBUS_BLOCK_PROC_CALL:
+ xact |= I801_BLOCK_PROC_CALL;
+ break;
+ case I2C_SMBUS_BLOCK_DATA:
+ xact |= I801_BLOCK_DATA;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
inb_p(SMBHSTCNT(priv)); /* reset the data buffer index */
@@ -524,12 +544,12 @@ static int i801_block_transaction_by_block(struct i801_priv *priv,
outb_p(data->block[i+1], SMBBLKDAT(priv));
}
- status = i801_transaction(priv, I801_BLOCK_DATA |
- (hwpec ? SMBHSTCNT_PEC_EN : 0));
+ status = i801_transaction(priv, xact);
if (status)
return status;
- if (read_write == I2C_SMBUS_READ) {
+ if (read_write == I2C_SMBUS_READ ||
+ command == I2C_SMBUS_BLOCK_PROC_CALL) {
len = inb_p(SMBHSTDAT0(priv));
if (len < 1 || len > I2C_SMBUS_BLOCK_MAX)
return -EPROTO;
@@ -667,6 +687,9 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
int result;
const struct i2c_adapter *adap = &priv->adapter;
+ if (command == I2C_SMBUS_BLOCK_PROC_CALL)
+ return -EOPNOTSUPP;
+
result = i801_check_pre(priv);
if (result < 0)
return result;
@@ -798,7 +821,8 @@ static int i801_block_transaction(struct i801_priv *priv,
&& command != I2C_SMBUS_I2C_BLOCK_DATA
&& i801_set_block_buffer_mode(priv) == 0)
result = i801_block_transaction_by_block(priv, data,
- read_write, hwpec);
+ read_write,
+ command, hwpec);
else
result = i801_block_transaction_byte_by_byte(priv, data,
read_write,
@@ -890,6 +914,15 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr,
outb_p(command, SMBHSTCMD(priv));
block = 1;
break;
+ case I2C_SMBUS_BLOCK_PROC_CALL:
+ /*
+ * Bit 0 of the slave address register always indicate a write
+ * command.
+ */
+ outb_p((addr & 0x7f) << 1, SMBHSTADD(priv));
+ outb_p(command, SMBHSTCMD(priv));
+ block = 1;
+ break;
default:
dev_err(&priv->pci_dev->dev, "Unsupported transaction %d\n",
size);
@@ -950,6 +983,8 @@ static u32 i801_func(struct i2c_adapter *adapter)
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK |
((priv->features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) |
+ ((priv->features & FEATURE_BLOCK_PROC) ?
+ I2C_FUNC_SMBUS_BLOCK_PROC_CALL : 0) |
((priv->features & FEATURE_I2C_BLOCK_READ) ?
I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0) |
((priv->features & FEATURE_HOST_NOTIFY) ?
@@ -1033,6 +1068,8 @@ static const struct pci_device_id i801_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CANNONLAKE_LP_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS) },
{ 0, }
};
@@ -1134,6 +1171,118 @@ static void dmi_check_onboard_devices(const struct dmi_header *dm, void *adap)
}
}
+/* NOTE: Keep this list in sync with drivers/platform/x86/dell-smo8800.c */
+static const char *const acpi_smo8800_ids[] = {
+ "SMO8800",
+ "SMO8801",
+ "SMO8810",
+ "SMO8811",
+ "SMO8820",
+ "SMO8821",
+ "SMO8830",
+ "SMO8831",
+};
+
+static acpi_status check_acpi_smo88xx_device(acpi_handle obj_handle,
+ u32 nesting_level,
+ void *context,
+ void **return_value)
+{
+ struct acpi_device_info *info;
+ acpi_status status;
+ char *hid;
+ int i;
+
+ status = acpi_get_object_info(obj_handle, &info);
+ if (!ACPI_SUCCESS(status) || !(info->valid & ACPI_VALID_HID))
+ return AE_OK;
+
+ hid = info->hardware_id.string;
+ if (!hid)
+ return AE_OK;
+
+ i = match_string(acpi_smo8800_ids, ARRAY_SIZE(acpi_smo8800_ids), hid);
+ if (i < 0)
+ return AE_OK;
+
+ *((bool *)return_value) = true;
+ return AE_CTRL_TERMINATE;
+}
+
+static bool is_dell_system_with_lis3lv02d(void)
+{
+ bool found;
+ const char *vendor;
+
+ vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+ if (!vendor || strcmp(vendor, "Dell Inc."))
+ return false;
+
+ /*
+ * Check that ACPI device SMO88xx is present and is functioning.
+ * Function acpi_get_devices() already filters all ACPI devices
+ * which are not present or are not functioning.
+ * ACPI device SMO88xx represents our ST microelectronics lis3lv02d
+ * accelerometer but unfortunately ACPI does not provide any other
+ * information (like I2C address).
+ */
+ found = false;
+ acpi_get_devices(NULL, check_acpi_smo88xx_device, NULL,
+ (void **)&found);
+
+ return found;
+}
+
+/*
+ * Accelerometer's I2C address is not specified in DMI nor ACPI,
+ * so it is needed to define mapping table based on DMI product names.
+ */
+static const struct {
+ const char *dmi_product_name;
+ unsigned short i2c_addr;
+} dell_lis3lv02d_devices[] = {
+ /*
+ * Dell platform team told us that these Latitude devices have
+ * ST microelectronics accelerometer at I2C address 0x29.
+ */
+ { "Latitude E5250", 0x29 },
+ { "Latitude E5450", 0x29 },
+ { "Latitude E5550", 0x29 },
+ { "Latitude E6440", 0x29 },
+ { "Latitude E6440 ATG", 0x29 },
+ { "Latitude E6540", 0x29 },
+ /*
+ * Additional individual entries were added after verification.
+ */
+ { "Vostro V131", 0x1d },
+};
+
+static void register_dell_lis3lv02d_i2c_device(struct i801_priv *priv)
+{
+ struct i2c_board_info info;
+ const char *dmi_product_name;
+ int i;
+
+ dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
+ for (i = 0; i < ARRAY_SIZE(dell_lis3lv02d_devices); ++i) {
+ if (strcmp(dmi_product_name,
+ dell_lis3lv02d_devices[i].dmi_product_name) == 0)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(dell_lis3lv02d_devices)) {
+ dev_warn(&priv->pci_dev->dev,
+ "Accelerometer lis3lv02d is present on SMBus but its"
+ " address is unknown, skipping registration\n");
+ return;
+ }
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = dell_lis3lv02d_devices[i].i2c_addr;
+ strlcpy(info.type, "lis3lv02d", I2C_NAME_SIZE);
+ i2c_new_device(&priv->adapter, &info);
+}
+
/* Register optional slaves */
static void i801_probe_optional_slaves(struct i801_priv *priv)
{
@@ -1152,6 +1301,9 @@ static void i801_probe_optional_slaves(struct i801_priv *priv)
if (dmi_name_in_vendors("FUJITSU"))
dmi_walk(dmi_check_onboard_devices, &priv->adapter);
+
+ if (is_dell_system_with_lis3lv02d())
+ register_dell_lis3lv02d_i2c_device(priv);
}
#else
static void __init input_apanel_init(void) {}
@@ -1250,7 +1402,8 @@ static int i801_add_mux(struct i801_priv *priv)
struct device *dev = &priv->adapter.dev;
const struct i801_mux_config *mux_config;
struct i2c_mux_gpio_platform_data gpio_data;
- int err;
+ struct gpiod_lookup_table *lookup;
+ int err, i;
if (!priv->mux_drvdata)
return 0;
@@ -1262,17 +1415,36 @@ static int i801_add_mux(struct i801_priv *priv)
gpio_data.values = mux_config->values;
gpio_data.n_values = mux_config->n_values;
gpio_data.classes = mux_config->classes;
- gpio_data.gpio_chip = mux_config->gpio_chip;
- gpio_data.gpios = mux_config->gpios;
- gpio_data.n_gpios = mux_config->n_gpios;
gpio_data.idle = I2C_MUX_GPIO_NO_IDLE;
- /* Register the mux device */
+ /* Register GPIO descriptor lookup table */
+ lookup = devm_kzalloc(dev,
+ struct_size(lookup, table, mux_config->n_gpios),
+ GFP_KERNEL);
+ if (!lookup)
+ return -ENOMEM;
+ lookup->dev_id = "i2c-mux-gpio";
+ for (i = 0; i < mux_config->n_gpios; i++) {
+ lookup->table[i].chip_label = mux_config->gpio_chip;
+ lookup->table[i].chip_hwnum = mux_config->gpios[i];
+ lookup->table[i].con_id = "mux";
+ }
+ gpiod_add_lookup_table(lookup);
+ priv->lookup = lookup;
+
+ /*
+ * Register the mux device, we use PLATFORM_DEVID_NONE here
+ * because since we are referring to the GPIO chip by name we are
+ * anyways in deep trouble if there is more than one of these
+ * devices, and there should likely only be one platform controller
+ * hub.
+ */
priv->mux_pdev = platform_device_register_data(dev, "i2c-mux-gpio",
- PLATFORM_DEVID_AUTO, &gpio_data,
+ PLATFORM_DEVID_NONE, &gpio_data,
sizeof(struct i2c_mux_gpio_platform_data));
if (IS_ERR(priv->mux_pdev)) {
err = PTR_ERR(priv->mux_pdev);
+ gpiod_remove_lookup_table(lookup);
priv->mux_pdev = NULL;
dev_err(dev, "Failed to register i2c-mux-gpio device\n");
return err;
@@ -1285,6 +1457,8 @@ static void i801_del_mux(struct i801_priv *priv)
{
if (priv->mux_pdev)
platform_device_unregister(priv->mux_pdev);
+ if (priv->lookup)
+ gpiod_remove_lookup_table(priv->lookup);
}
static unsigned int i801_get_adapter_class(struct i801_priv *priv)
@@ -1530,6 +1704,9 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
case PCI_DEVICE_ID_INTEL_KABYLAKE_PCH_H_SMBUS:
case PCI_DEVICE_ID_INTEL_ICELAKE_LP_SMBUS:
case PCI_DEVICE_ID_INTEL_COMETLAKE_SMBUS:
+ case PCI_DEVICE_ID_INTEL_ELKHART_LAKE_SMBUS:
+ case PCI_DEVICE_ID_INTEL_TIGERLAKE_LP_SMBUS:
+ priv->features |= FEATURE_BLOCK_PROC;
priv->features |= FEATURE_I2C_BLOCK_READ;
priv->features |= FEATURE_IRQ;
priv->features |= FEATURE_SMBUS_PEC;
@@ -1549,6 +1726,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
priv->features |= FEATURE_IDF;
/* fall through */
default:
+ priv->features |= FEATURE_BLOCK_PROC;
priv->features |= FEATURE_I2C_BLOCK_READ;
priv->features |= FEATURE_IRQ;
/* fall through */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 09:02:47 +0000