summaryrefslogtreecommitdiff
path: root/drivers/i2c/busses/i2c-designware-pcidrv.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-pcidrv.c')
-rw-r--r--drivers/i2c/busses/i2c-designware-pcidrv.c125
1 files changed, 66 insertions, 59 deletions
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index f6ed06c966ee..85056c22d21e 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -54,6 +54,16 @@ enum dw_pci_ctl_id_t {
medfield_3,
medfield_4,
medfield_5,
+
+ baytrail,
+};
+
+struct dw_scl_sda_cfg {
+ u32 ss_hcnt;
+ u32 fs_hcnt;
+ u32 ss_lcnt;
+ u32 fs_lcnt;
+ u32 sda_hold;
};
struct dw_pci_controller {
@@ -62,12 +72,29 @@ struct dw_pci_controller {
u32 tx_fifo_depth;
u32 rx_fifo_depth;
u32 clk_khz;
+ u32 functionality;
+ struct dw_scl_sda_cfg *scl_sda_cfg;
};
#define INTEL_MID_STD_CFG (DW_IC_CON_MASTER | \
DW_IC_CON_SLAVE_DISABLE | \
DW_IC_CON_RESTART_EN)
+#define DW_DEFAULT_FUNCTIONALITY (I2C_FUNC_I2C | \
+ I2C_FUNC_SMBUS_BYTE | \
+ I2C_FUNC_SMBUS_BYTE_DATA | \
+ I2C_FUNC_SMBUS_WORD_DATA | \
+ I2C_FUNC_SMBUS_I2C_BLOCK)
+
+/* BayTrail HCNT/LCNT/SDA hold time */
+static struct dw_scl_sda_cfg byt_config = {
+ .ss_hcnt = 0x200,
+ .fs_hcnt = 0x55,
+ .ss_lcnt = 0x200,
+ .fs_lcnt = 0x99,
+ .sda_hold = 0x6,
+};
+
static struct dw_pci_controller dw_pci_controllers[] = {
[moorestown_0] = {
.bus_num = 0,
@@ -132,75 +159,40 @@ static struct dw_pci_controller dw_pci_controllers[] = {
.rx_fifo_depth = 32,
.clk_khz = 25000,
},
+ [baytrail] = {
+ .bus_num = -1,
+ .bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST,
+ .tx_fifo_depth = 32,
+ .rx_fifo_depth = 32,
+ .clk_khz = 100000,
+ .functionality = I2C_FUNC_10BIT_ADDR,
+ .scl_sda_cfg = &byt_config,
+ },
};
static struct i2c_algorithm i2c_dw_algo = {
.master_xfer = i2c_dw_xfer,
.functionality = i2c_dw_func,
};
+#ifdef CONFIG_PM
static int i2c_dw_pci_suspend(struct device *dev)
{
struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
- struct dw_i2c_dev *i2c = pci_get_drvdata(pdev);
- int err;
-
-
- i2c_dw_disable(i2c);
-
- err = pci_save_state(pdev);
- if (err) {
- dev_err(&pdev->dev, "pci_save_state failed\n");
- return err;
- }
-
- err = pci_set_power_state(pdev, PCI_D3hot);
- if (err) {
- dev_err(&pdev->dev, "pci_set_power_state failed\n");
- return err;
- }
+ i2c_dw_disable(pci_get_drvdata(pdev));
return 0;
}
static int i2c_dw_pci_resume(struct device *dev)
{
struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
- struct dw_i2c_dev *i2c = pci_get_drvdata(pdev);
- int err;
- u32 enabled;
-
- enabled = i2c_dw_is_enabled(i2c);
- if (enabled)
- return 0;
-
- err = pci_set_power_state(pdev, PCI_D0);
- if (err) {
- dev_err(&pdev->dev, "pci_set_power_state() failed\n");
- return err;
- }
-
- pci_restore_state(pdev);
-
- i2c_dw_init(i2c);
- return 0;
-}
-static int i2c_dw_pci_runtime_idle(struct device *dev)
-{
- int err = pm_schedule_suspend(dev, 500);
- dev_dbg(dev, "runtime_idle called\n");
-
- if (err != 0)
- return 0;
- return -EBUSY;
+ return i2c_dw_init(pci_get_drvdata(pdev));
}
+#endif
-static const struct dev_pm_ops i2c_dw_pm_ops = {
- .resume = i2c_dw_pci_resume,
- .suspend = i2c_dw_pci_suspend,
- SET_RUNTIME_PM_OPS(i2c_dw_pci_suspend, i2c_dw_pci_resume,
- i2c_dw_pci_runtime_idle)
-};
+static UNIVERSAL_DEV_PM_OPS(i2c_dw_pm_ops, i2c_dw_pci_suspend,
+ i2c_dw_pci_resume, NULL);
static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev)
{
@@ -214,6 +206,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
struct i2c_adapter *adap;
int r;
struct dw_pci_controller *controller;
+ struct dw_scl_sda_cfg *cfg;
if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers)) {
dev_err(&pdev->dev, "%s: invalid driver data %ld\n", __func__,
@@ -247,13 +240,18 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
dev->base = pcim_iomap_table(pdev)[0];
dev->dev = &pdev->dev;
- dev->functionality =
- I2C_FUNC_I2C |
- I2C_FUNC_SMBUS_BYTE |
- I2C_FUNC_SMBUS_BYTE_DATA |
- I2C_FUNC_SMBUS_WORD_DATA |
- I2C_FUNC_SMBUS_I2C_BLOCK;
+ dev->functionality = controller->functionality |
+ DW_DEFAULT_FUNCTIONALITY;
+
dev->master_cfg = controller->bus_cfg;
+ if (controller->scl_sda_cfg) {
+ cfg = controller->scl_sda_cfg;
+ dev->ss_hcnt = cfg->ss_hcnt;
+ dev->fs_hcnt = cfg->fs_hcnt;
+ dev->ss_lcnt = cfg->ss_lcnt;
+ dev->fs_lcnt = cfg->fs_lcnt;
+ dev->sda_hold_time = cfg->sda_hold;
+ }
pci_set_drvdata(pdev, dev);
@@ -270,8 +268,8 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
adap->algo = &i2c_dw_algo;
adap->dev.parent = &pdev->dev;
adap->nr = controller->bus_num;
- snprintf(adap->name, sizeof(adap->name), "i2c-designware-pci-%d",
- adap->nr);
+
+ snprintf(adap->name, sizeof(adap->name), "i2c-designware-pci");
r = devm_request_irq(&pdev->dev, pdev->irq, i2c_dw_isr, IRQF_SHARED,
adap->name, dev);
@@ -290,6 +288,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_put_autosuspend(&pdev->dev);
pm_runtime_allow(&pdev->dev);
return 0;
@@ -309,7 +308,7 @@ static void i2c_dw_pci_remove(struct pci_dev *pdev)
/* work with hotplug and coldplug */
MODULE_ALIAS("i2c_designware-pci");
-static DEFINE_PCI_DEVICE_TABLE(i2_designware_pci_ids) = {
+static const struct pci_device_id i2_designware_pci_ids[] = {
/* Moorestown */
{ PCI_VDEVICE(INTEL, 0x0802), moorestown_0 },
{ PCI_VDEVICE(INTEL, 0x0803), moorestown_1 },
@@ -321,6 +320,14 @@ static DEFINE_PCI_DEVICE_TABLE(i2_designware_pci_ids) = {
{ PCI_VDEVICE(INTEL, 0x082C), medfield_0 },
{ PCI_VDEVICE(INTEL, 0x082D), medfield_1 },
{ PCI_VDEVICE(INTEL, 0x082E), medfield_2 },
+ /* Baytrail */
+ { PCI_VDEVICE(INTEL, 0x0F41), baytrail },
+ { PCI_VDEVICE(INTEL, 0x0F42), baytrail },
+ { PCI_VDEVICE(INTEL, 0x0F43), baytrail },
+ { PCI_VDEVICE(INTEL, 0x0F44), baytrail },
+ { PCI_VDEVICE(INTEL, 0x0F45), baytrail },
+ { PCI_VDEVICE(INTEL, 0x0F46), baytrail },
+ { PCI_VDEVICE(INTEL, 0x0F47), baytrail },
{ 0,}
};
MODULE_DEVICE_TABLE(pci, i2_designware_pci_ids);