summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--src/soc/intel/common/lpss_i2c.c44
-rw-r--r--src/soc/intel/common/lpss_i2c.h13
-rw-r--r--src/soc/intel/skylake/acpi/serialio.asl19
-rw-r--r--src/soc/intel/skylake/chip.h3
-rw-r--r--src/soc/intel/skylake/i2c.c47
-rw-r--r--src/soc/intel/skylake/romstage/i2c.c14
6 files changed, 100 insertions, 40 deletions
diff --git a/src/soc/intel/common/lpss_i2c.c b/src/soc/intel/common/lpss_i2c.c
index bb684e2f35..a9bbbb32a7 100644
--- a/src/soc/intel/common/lpss_i2c.c
+++ b/src/soc/intel/common/lpss_i2c.c
@@ -20,6 +20,7 @@
#include <console/console.h>
#include <device/device.h>
#include <device/i2c.h>
+#include <string.h>
#include <timer.h>
#include "lpss_i2c.h"
@@ -305,7 +306,17 @@ int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
return 0;
}
-void lpss_i2c_acpi_write_speed_config(
+/*
+ * Write ACPI object to describe speed configuration.
+ *
+ * ACPI Object: Name ("xxxx", Package () { scl_lcnt, scl_hcnt, sda_hold }
+ *
+ * SSCN: I2C_SPEED_STANDARD
+ * FMCN: I2C_SPEED_FAST
+ * FPCN: I2C_SPEED_FAST_PLUS
+ * HSCN: I2C_SPEED_HIGH
+ */
+static void lpss_i2c_acpi_write_speed_config(
const struct lpss_i2c_speed_config *config)
{
if (!config)
@@ -330,6 +341,37 @@ void lpss_i2c_acpi_write_speed_config(
acpigen_pop_len();
}
+void lpss_i2c_acpi_fill_ssdt(const struct lpss_i2c_speed_config *override)
+{
+ const struct lpss_i2c_speed_config *sptr;
+ struct lpss_i2c_speed_config sgen;
+ enum i2c_speed speeds[LPSS_I2C_SPEED_CONFIG_COUNT] = {
+ I2C_SPEED_STANDARD,
+ I2C_SPEED_FAST,
+ I2C_SPEED_FAST_PLUS,
+ I2C_SPEED_HIGH,
+ };
+ int i;
+
+ /* Report timing values for the OS driver */
+ for (i = 0; i < LPSS_I2C_SPEED_CONFIG_COUNT; i++) {
+ /* Generate speed config for default case */
+ if (lpss_i2c_gen_speed_config(speeds[i], &sgen) < 0)
+ continue;
+
+ /* Apply board specific override for this speed if found */
+ for (sptr = override; sptr && sptr->speed; sptr++) {
+ if (sptr->speed == speeds[i]) {
+ memcpy(&sgen, sptr, sizeof(sgen));
+ break;
+ }
+ }
+
+ /* Generate ACPI based on selected speed config */
+ lpss_i2c_acpi_write_speed_config(&sgen);
+ }
+}
+
int lpss_i2c_set_speed_config(unsigned bus,
const struct lpss_i2c_speed_config *config)
{
diff --git a/src/soc/intel/common/lpss_i2c.h b/src/soc/intel/common/lpss_i2c.h
index 1ca23b59e8..3ec92134c7 100644
--- a/src/soc/intel/common/lpss_i2c.h
+++ b/src/soc/intel/common/lpss_i2c.h
@@ -85,17 +85,10 @@ int lpss_i2c_set_speed_config(unsigned bus,
const struct lpss_i2c_speed_config *config);
/*
- * Write ACPI object to describe speed configuration.
- *
- * ACPI Object: Name ("xxxx", Package () { scl_lcnt, scl_hcnt, sda_hold }
- *
- * SSCN: I2C_SPEED_STANDARD
- * FMCN: I2C_SPEED_FAST
- * FPCN: I2C_SPEED_FAST_PLUS
- * HSCN: I2C_SPEED_HIGH
+ * Generate I2C timing information into the SSDT for the OS driver to consume,
+ * optionally applying override values provided by the caller.
*/
-void lpss_i2c_acpi_write_speed_config(
- const struct lpss_i2c_speed_config *config);
+void lpss_i2c_acpi_fill_ssdt(const struct lpss_i2c_speed_config *override);
/*
* Set I2C bus speed for this controller.
diff --git a/src/soc/intel/skylake/acpi/serialio.asl b/src/soc/intel/skylake/acpi/serialio.asl
index f274be83eb..849679be62 100644
--- a/src/soc/intel/skylake/acpi/serialio.asl
+++ b/src/soc/intel/skylake/acpi/serialio.asl
@@ -20,55 +20,36 @@ Device (I2C0)
{
Name (_ADR, 0x00150000)
Name (_DDN, "Serial IO I2C Controller 0")
-
- Name (SSCN, Package () { 432, 507, 30 })
- Name (FMCN, Package () { 72, 160, 30 })
}
Device (I2C1)
{
Name (_ADR, 0x00150001)
Name (_DDN, "Serial IO I2C Controller 1")
-
- Name (SSCN, Package () { 528, 640, 30 })
- Name (FMCN, Package () { 128, 160, 30 })
- Name (FPCN, Package () { 48, 64, 30})
}
Device (I2C2)
{
Name (_ADR, 0x00150002)
Name (_DDN, "Serial IO I2C Controller 2")
-
- Name (SSCN, Package () { 432, 507, 30 })
- Name (FMCN, Package () { 72, 160, 30 })
}
Device (I2C3)
{
Name (_ADR, 0x00150003)
Name (_DDN, "Serial IO I2C Controller 3")
-
- Name (SSCN, Package () { 432, 507, 30 })
- Name (FMCN, Package () { 72, 160, 30 })
}
Device (I2C4)
{
Name (_ADR, 0x00190002)
Name (_DDN, "Serial IO I2C Controller 4")
-
- Name (SSCN, Package () { 432, 507, 30 })
- Name (FMCN, Package () { 72, 160, 30 })
}
Device (I2C5)
{
Name (_ADR, 0x00190002)
Name (_DDN, "Serial IO I2C Controller 5")
-
- Name (SSCN, Package () { 432, 507, 30 })
- Name (FMCN, Package () { 72, 160, 30 })
}
Device (SPI0)
diff --git a/src/soc/intel/skylake/chip.h b/src/soc/intel/skylake/chip.h
index fe03e59451..eec6f1ed17 100644
--- a/src/soc/intel/skylake/chip.h
+++ b/src/soc/intel/skylake/chip.h
@@ -24,6 +24,7 @@
#include <stdint.h>
#include <soc/gpio_defs.h>
#include <soc/gpe.h>
+#include <soc/intel/common/lpss_i2c.h>
#include <soc/pci_devs.h>
#include <soc/pmc.h>
#include <soc/serialio.h>
@@ -44,6 +45,8 @@ struct skylake_i2c_config {
enum i2c_speed speed;
/* Bus should be enabled prior to ramstage with temporary base */
int early_init;
+ /* Custom bus speed configuration { scl_lcnt, scl_hcnt, sda_hold } */
+ struct lpss_i2c_speed_config speed_config[LPSS_I2C_SPEED_CONFIG_COUNT];
};
struct soc_intel_skylake_config {
diff --git a/src/soc/intel/skylake/i2c.c b/src/soc/intel/skylake/i2c.c
index 64d39cddb2..eebe665d94 100644
--- a/src/soc/intel/skylake/i2c.c
+++ b/src/soc/intel/skylake/i2c.c
@@ -13,9 +13,11 @@
* GNU General Public License for more details.
*/
+#include <arch/acpigen.h>
#include <device/device.h>
#include <device/i2c.h>
#include <device/pci.h>
+#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <soc/intel/common/lpss_i2c.h>
#include <soc/ramstage.h>
@@ -54,26 +56,53 @@ static int i2c_dev_to_bus(struct device *dev)
static void i2c_dev_init(struct device *dev)
{
struct soc_intel_skylake_config *config = dev->chip_info;
+ const struct lpss_i2c_speed_config *sptr;
+ enum i2c_speed speed;
+ int i, bus = i2c_dev_to_bus(dev);
+
+ if (!config || bus < 0)
+ return;
+
+ speed = config->i2c[bus].speed ? : I2C_SPEED_FAST;
+ lpss_i2c_init(bus, speed);
+
+ /* Apply custom speed config if it has been set by the board */
+ for (i = 0; i < LPSS_I2C_SPEED_CONFIG_COUNT; i++) {
+ sptr = &config->i2c[bus].speed_config[i];
+ if (sptr->speed == speed) {
+ lpss_i2c_set_speed_config(bus, sptr);
+ break;
+ }
+ }
+}
+
+/* Generate ACPI I2C device objects */
+static void i2c_fill_ssdt(struct device *dev)
+{
+ struct soc_intel_skylake_config *config = dev->chip_info;
int bus = i2c_dev_to_bus(dev);
if (!config || bus < 0)
return;
- lpss_i2c_init(bus, config->i2c[bus].speed ? : I2C_SPEED_FAST);
+ acpigen_write_scope(acpi_device_path(dev));
+ lpss_i2c_acpi_fill_ssdt(config->i2c[bus].speed_config);
+ acpigen_pop_len();
}
static struct i2c_bus_operations i2c_bus_ops = {
- .dev_to_bus = &i2c_dev_to_bus,
+ .dev_to_bus = &i2c_dev_to_bus,
};
static struct device_operations i2c_dev_ops = {
- .read_resources = &pci_dev_read_resources,
- .set_resources = &pci_dev_set_resources,
- .enable_resources = &pci_dev_enable_resources,
- .scan_bus = &scan_smbus,
- .ops_pci = &soc_pci_ops,
- .ops_i2c_bus = &i2c_bus_ops,
- .init = &i2c_dev_init,
+ .read_resources = &pci_dev_read_resources,
+ .set_resources = &pci_dev_set_resources,
+ .enable_resources = &pci_dev_enable_resources,
+ .scan_bus = &scan_smbus,
+ .ops_pci = &soc_pci_ops,
+ .ops_i2c_bus = &i2c_bus_ops,
+ .init = &i2c_dev_init,
+ .acpi_fill_ssdt_generator = &i2c_fill_ssdt,
};
static const unsigned short pci_device_ids[] = {
diff --git a/src/soc/intel/skylake/romstage/i2c.c b/src/soc/intel/skylake/romstage/i2c.c
index 64e692420e..3d2e9945c0 100644
--- a/src/soc/intel/skylake/romstage/i2c.c
+++ b/src/soc/intel/skylake/romstage/i2c.c
@@ -46,6 +46,8 @@ static void i2c_early_init_bus(unsigned bus)
{
ROMSTAGE_CONST struct soc_intel_skylake_config *config;
ROMSTAGE_CONST struct device *tree_dev;
+ const struct lpss_i2c_speed_config *sptr;
+ enum i2c_speed speed;
pci_devfn_t dev;
unsigned devfn;
uintptr_t base;
@@ -84,7 +86,17 @@ static void i2c_early_init_bus(unsigned bus)
write32(reg, value);
/* Initialize the controller */
- lpss_i2c_init(bus, config->i2c[bus].speed ? : I2C_SPEED_FAST);
+ speed = config->i2c[bus].speed ? : I2C_SPEED_FAST;
+ lpss_i2c_init(bus, speed);
+
+ /* Apply custom speed config if it has been set by the board */
+ for (value = 0; value < LPSS_I2C_SPEED_CONFIG_COUNT; value++) {
+ sptr = &config->i2c[bus].speed_config[value];
+ if (sptr->speed == speed) {
+ lpss_i2c_set_speed_config(bus, sptr);
+ break;
+ }
+ }
}
void i2c_early_init(void)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 14:41:31 +0000