The cherrytrail punit has the pmic i2c bus access semaphore at a
different register address.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
Reviewed-by: Takashi Iwai <ti...@suse.de>
Tested-by: Takashi Iwai <ti...@suse.de>
Reviewed-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
---
Changes in v2:
-Adjust for accessor_flags -> flags rename
-Add flags field to struct dw_pci_controller
-Add get_sem_addr() helper replacing MODEL_CHERRYTRAIL flag checking in
PUNIT_SEMAPHORE macro
Changes in v3:
-Add a gap between ACCESS_* and MODEL_* flags as reserved space for
future ACCESS_* flags
Changes in v4:
-s/CHV/CHT/
---
drivers/i2c/busses/i2c-designware-baytrail.c | 22 +++++++++++++++++-----
drivers/i2c/busses/i2c-designware-core.h | 2 ++
drivers/i2c/busses/i2c-designware-pcidrv.c | 26 +++++++++++++++++++-------
drivers/i2c/busses/i2c-designware-platdrv.c | 2 +-
4 files changed, 39 insertions(+), 13 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-baytrail.c
b/drivers/i2c/busses/i2c-designware-baytrail.c
index 95d7013..9481411 100644
--- a/drivers/i2c/busses/i2c-designware-baytrail.c
+++ b/drivers/i2c/busses/i2c-designware-baytrail.c
@@ -24,13 +24,23 @@
#define SEMAPHORE_TIMEOUT 100
#define PUNIT_SEMAPHORE 0x7
+#define PUNIT_SEMAPHORE_CHT 0x10e
#define PUNIT_SEMAPHORE_BIT BIT(0)
#define PUNIT_SEMAPHORE_ACQUIRE BIT(1)
static unsigned long acquired;
+static u32 get_sem_addr(struct dw_i2c_dev *dev)
+{
+ if (dev->flags & MODEL_CHERRYTRAIL)
+ return PUNIT_SEMAPHORE_CHT;
+ else
+ return PUNIT_SEMAPHORE;
+}
+
static int get_sem(struct dw_i2c_dev *dev, u32 *sem)
{
+ u32 addr = get_sem_addr(dev);
u32 data;
int ret;
@@ -41,7 +51,7 @@ static int get_sem(struct dw_i2c_dev *dev, u32 *sem)
*/
pm_qos_update_request(&dev->pm_qos, 0);
- ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, PUNIT_SEMAPHORE,
&data);
+ ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, addr, &data);
if (ret) {
dev_err(dev->dev, "iosf failed to read punit semaphore\n");
return ret;
@@ -54,15 +64,16 @@ static int get_sem(struct dw_i2c_dev *dev, u32 *sem)
static void reset_semaphore(struct dw_i2c_dev *dev)
{
+ u32 addr = get_sem_addr(dev);
u32 data;
- if (iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, PUNIT_SEMAPHORE,
&data)) {
+ if (iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, addr, &data)) {
dev_err(dev->dev, "iosf failed to reset punit semaphore during
read\n");
return;
}
data &= ~PUNIT_SEMAPHORE_BIT;
- if (iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, PUNIT_SEMAPHORE,
data))
+ if (iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, addr, data))
dev_err(dev->dev, "iosf failed to reset punit semaphore during
write\n");
pm_qos_update_request(&dev->pm_qos, PM_QOS_DEFAULT_VALUE);
@@ -70,6 +81,7 @@ static void reset_semaphore(struct dw_i2c_dev *dev)
static int baytrail_i2c_acquire(struct dw_i2c_dev *dev)
{
+ u32 addr = get_sem_addr(dev);
u32 sem = PUNIT_SEMAPHORE_ACQUIRE;
int ret;
unsigned long start, end;
@@ -83,7 +95,7 @@ static int baytrail_i2c_acquire(struct dw_i2c_dev *dev)
return 0;
/* host driver writes to side band semaphore register */
- ret = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, PUNIT_SEMAPHORE,
sem);
+ ret = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, addr, sem);
if (ret) {
dev_err(dev->dev, "iosf punit semaphore request failed\n");
return ret;
@@ -107,7 +119,7 @@ static int baytrail_i2c_acquire(struct dw_i2c_dev *dev)
dev_err(dev->dev, "punit semaphore timed out, resetting\n");
reset_semaphore(dev);
- ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, PUNIT_SEMAPHORE,
&sem);
+ ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, addr, &sem);
if (ret)
dev_err(dev->dev, "iosf failed to read punit semaphore\n");
else
diff --git a/drivers/i2c/busses/i2c-designware-core.h
b/drivers/i2c/busses/i2c-designware-core.h
index 871970e..cd4a874 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -127,6 +127,8 @@ struct dw_i2c_dev {
#define ACCESS_16BIT 0x00000002
#define ACCESS_INTR_MASK 0x00000004
+#define MODEL_CHERRYTRAIL 0x00000100
+
extern int i2c_dw_init(struct dw_i2c_dev *dev);
extern void i2c_dw_disable(struct dw_i2c_dev *dev);
extern void i2c_dw_disable_int(struct dw_i2c_dev *dev);
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c
b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 96f8230..4e53a9f 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -45,6 +45,7 @@ enum dw_pci_ctl_id_t {
medfield,
merrifield,
baytrail,
+ cherrytrail,
haswell,
};
@@ -63,6 +64,7 @@ struct dw_pci_controller {
u32 rx_fifo_depth;
u32 clk_khz;
u32 functionality;
+ u32 flags;
struct dw_scl_sda_cfg *scl_sda_cfg;
int (*setup)(struct pci_dev *pdev, struct dw_pci_controller *c);
};
@@ -174,6 +176,15 @@ static struct dw_pci_controller dw_pci_controllers[] = {
.functionality = I2C_FUNC_10BIT_ADDR,
.scl_sda_cfg = &hsw_config,
},
+ [cherrytrail] = {
+ .bus_num = -1,
+ .bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
+ .tx_fifo_depth = 32,
+ .rx_fifo_depth = 32,
+ .functionality = I2C_FUNC_10BIT_ADDR,
+ .flags = MODEL_CHERRYTRAIL,
+ .scl_sda_cfg = &byt_config,
+ },
};
#ifdef CONFIG_PM
@@ -241,6 +252,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->base = pcim_iomap_table(pdev)[0];
dev->dev = &pdev->dev;
dev->irq = pdev->irq;
+ dev->flags |= controller->flags;
if (controller->setup) {
r = controller->setup(pdev, controller);
@@ -321,13 +333,13 @@ static const struct pci_device_id i2_designware_pci_ids[]
= {
{ PCI_VDEVICE(INTEL, 0x9c61), haswell },
{ PCI_VDEVICE(INTEL, 0x9c62), haswell },
/* Braswell / Cherrytrail */
- { PCI_VDEVICE(INTEL, 0x22C1), baytrail },
- { PCI_VDEVICE(INTEL, 0x22C2), baytrail },
- { PCI_VDEVICE(INTEL, 0x22C3), baytrail },
- { PCI_VDEVICE(INTEL, 0x22C4), baytrail },
- { PCI_VDEVICE(INTEL, 0x22C5), baytrail },
- { PCI_VDEVICE(INTEL, 0x22C6), baytrail },
- { PCI_VDEVICE(INTEL, 0x22C7), baytrail },
+ { PCI_VDEVICE(INTEL, 0x22C1), cherrytrail },
+ { PCI_VDEVICE(INTEL, 0x22C2), cherrytrail },
+ { PCI_VDEVICE(INTEL, 0x22C3), cherrytrail },
+ { PCI_VDEVICE(INTEL, 0x22C4), cherrytrail },
+ { PCI_VDEVICE(INTEL, 0x22C5), cherrytrail },
+ { PCI_VDEVICE(INTEL, 0x22C6), cherrytrail },
+ { PCI_VDEVICE(INTEL, 0x22C7), cherrytrail },
{ 0,}
};
MODULE_DEVICE_TABLE(pci, i2_designware_pci_ids);
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c
b/drivers/i2c/busses/i2c-designware-platdrv.c
index b0a64a2..985c4de 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -123,7 +123,7 @@ static const struct acpi_device_id dw_i2c_acpi_match[] = {
{ "INT3432", 0 },
{ "INT3433", 0 },
{ "80860F41", 0 },
- { "808622C1", 0 },
+ { "808622C1", MODEL_CHERRYTRAIL },
{ "AMD0010", ACCESS_INTR_MASK },
{ "AMDI0010", ACCESS_INTR_MASK },
{ "AMDI0510", 0 },
--
2.9.3
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