diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-pcidrv.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-pcidrv.c | 86 |
1 files changed, 32 insertions, 54 deletions
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 7a0b65b5b5b5..947c096f86e3 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -46,20 +46,12 @@ struct dw_scl_sda_cfg { struct dw_pci_controller { u32 bus_num; - u32 bus_cfg; - u32 tx_fifo_depth; - 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); + u32 (*get_clk_rate_khz)(struct dw_i2c_dev *dev); }; -#define INTEL_MID_STD_CFG (DW_IC_CON_MASTER | \ - DW_IC_CON_SLAVE_DISABLE | \ - DW_IC_CON_RESTART_EN) - /* Merrifield HCNT/LCNT/SDA hold time */ static struct dw_scl_sda_cfg mrfld_config = { .ss_hcnt = 0x2f8, @@ -86,12 +78,18 @@ static struct dw_scl_sda_cfg hsw_config = { .sda_hold = 0x9, }; +static u32 mfld_get_clk_rate_khz(struct dw_i2c_dev *dev) +{ + return 25000; +} + static int mfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c) { + struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev); + switch (pdev->device) { case 0x0817: - c->bus_cfg &= ~DW_IC_CON_SPEED_MASK; - c->bus_cfg |= DW_IC_CON_SPEED_STD; + dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ; /* fall through */ case 0x0818: case 0x0819: @@ -125,57 +123,37 @@ static int mrfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c) return -ENODEV; } +static u32 ehl_get_clk_rate_khz(struct dw_i2c_dev *dev) +{ + return 100000; +} + static struct dw_pci_controller dw_pci_controllers[] = { [medfield] = { .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, - .clk_khz = 25000, .setup = mfld_setup, + .get_clk_rate_khz = mfld_get_clk_rate_khz, }, [merrifield] = { .bus_num = -1, - .bus_cfg = INTEL_MID_STD_CFG | DW_IC_CON_SPEED_FAST, - .tx_fifo_depth = 64, - .rx_fifo_depth = 64, - .functionality = I2C_FUNC_10BIT_ADDR, .scl_sda_cfg = &mrfld_config, .setup = mrfld_setup, }, [baytrail] = { .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, .scl_sda_cfg = &byt_config, }, [haswell] = { .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, .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, }, [elkhartlake] = { .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, - .clk_khz = 100000, + .get_clk_rate_khz = ehl_get_clk_rate_khz, }, }; @@ -205,11 +183,6 @@ static int i2c_dw_pci_resume(struct device *dev) 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) -{ - return dev->controller->clk_khz; -} - static int i2c_dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { @@ -250,14 +223,15 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, if (r < 0) return r; - dev->clk = NULL; - dev->controller = controller; - dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; + dev->get_clk_rate_khz = controller->get_clk_rate_khz; + dev->timings.bus_freq_hz = I2C_MAX_FAST_MODE_FREQ; dev->base = pcim_iomap_table(pdev)[0]; dev->dev = &pdev->dev; dev->irq = pci_irq_vector(pdev, 0); dev->flags |= controller->flags; + pci_set_drvdata(pdev, dev); + if (controller->setup) { r = controller->setup(pdev, controller); if (r) { @@ -266,10 +240,19 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, } } - dev->functionality = controller->functionality | - DW_IC_DEFAULT_FUNCTIONALITY; + i2c_dw_acpi_adjust_bus_speed(&pdev->dev); + + if (has_acpi_companion(&pdev->dev)) + i2c_dw_acpi_configure(&pdev->dev); + + r = i2c_dw_validate_speed(dev); + if (r) { + pci_free_irq_vectors(pdev); + return r; + } + + i2c_dw_configure(dev); - dev->master_cfg = controller->bus_cfg; if (controller->scl_sda_cfg) { cfg = controller->scl_sda_cfg; dev->ss_hcnt = cfg->ss_hcnt; @@ -279,11 +262,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, dev->sda_hold_time = cfg->sda_hold; } - pci_set_drvdata(pdev, dev); - - dev->tx_fifo_depth = controller->tx_fifo_depth; - dev->rx_fifo_depth = controller->rx_fifo_depth; - adap = &dev->adapter; adap->owner = THIS_MODULE; adap->class = 0; |