diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-core.h')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-core.h | 75 |
1 files changed, 59 insertions, 16 deletions
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index b220ad64c38d..556673a1f61b 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -9,7 +9,14 @@ * Copyright (C) 2009 Provigent Ltd. */ +#include <linux/bits.h> +#include <linux/compiler_types.h> +#include <linux/completion.h> +#include <linux/dev_printk.h> +#include <linux/errno.h> #include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/types.h> #define DW_IC_DEFAULT_FUNCTIONALITY (I2C_FUNC_I2C | \ I2C_FUNC_SMBUS_BYTE | \ @@ -120,8 +127,6 @@ #define STATUS_WRITE_IN_PROGRESS 0x1 #define STATUS_READ_IN_PROGRESS 0x2 -#define TIMEOUT 20 /* ms */ - /* * operation modes */ @@ -170,11 +175,17 @@ DW_IC_TX_ABRT_TXDATA_NOACK | \ DW_IC_TX_ABRT_GCALL_NOACK) +struct clk; +struct device; +struct reset_control; /** * struct dw_i2c_dev - private i2c-designware data * @dev: driver model device node + * @map: IO registers map + * @sysmap: System controller registers map * @base: IO registers pointer + * @ext: Extended IO registers pointer * @cmd_complete: tx completion indicator * @clk: input reference clock * @pclk: clock required to access the registers @@ -224,6 +235,8 @@ */ struct dw_i2c_dev { struct device *dev; + struct regmap *map; + struct regmap *sysmap; void __iomem *base; void __iomem *ext; struct completion cmd_complete; @@ -232,7 +245,6 @@ struct dw_i2c_dev { struct reset_control *rst; struct i2c_client *slave; u32 (*get_clk_rate_khz) (struct dw_i2c_dev *dev); - struct dw_pci_controller *controller; int cmd_err; struct i2c_msg *msgs; int msgs_num; @@ -276,18 +288,14 @@ struct dw_i2c_dev { bool suspended; }; -#define ACCESS_SWAP 0x00000001 -#define ACCESS_16BIT 0x00000002 -#define ACCESS_INTR_MASK 0x00000004 -#define ACCESS_NO_IRQ_SUSPEND 0x00000008 +#define ACCESS_INTR_MASK 0x00000001 +#define ACCESS_NO_IRQ_SUSPEND 0x00000002 -#define MODEL_CHERRYTRAIL 0x00000100 -#define MODEL_MSCC_OCELOT 0x00000200 +#define MODEL_MSCC_OCELOT 0x00000100 +#define MODEL_BAIKAL_BT1 0x00000200 #define MODEL_MASK 0x00000f00 -u32 dw_readl(struct dw_i2c_dev *dev, int offset); -void dw_writel(struct dw_i2c_dev *dev, u32 b, int offset); -int i2c_dw_set_reg_access(struct dw_i2c_dev *dev); +int i2c_dw_init_regmap(struct dw_i2c_dev *dev); u32 i2c_dw_scl_hcnt(u32 ic_clk, u32 tSYMBOL, u32 tf, int cond, int offset); u32 i2c_dw_scl_lcnt(u32 ic_clk, u32 tLOW, u32 tf, int offset); int i2c_dw_set_sda_hold(struct dw_i2c_dev *dev); @@ -297,32 +305,67 @@ int i2c_dw_acquire_lock(struct dw_i2c_dev *dev); void i2c_dw_release_lock(struct dw_i2c_dev *dev); int i2c_dw_wait_bus_not_busy(struct dw_i2c_dev *dev); int i2c_dw_handle_tx_abort(struct dw_i2c_dev *dev); -void i2c_dw_set_fifo_size(struct dw_i2c_dev *dev); +int i2c_dw_set_fifo_size(struct dw_i2c_dev *dev); u32 i2c_dw_func(struct i2c_adapter *adap); void i2c_dw_disable(struct dw_i2c_dev *dev); void i2c_dw_disable_int(struct dw_i2c_dev *dev); static inline void __i2c_dw_enable(struct dw_i2c_dev *dev) { - dw_writel(dev, 1, DW_IC_ENABLE); + regmap_write(dev->map, DW_IC_ENABLE, 1); } static inline void __i2c_dw_disable_nowait(struct dw_i2c_dev *dev) { - dw_writel(dev, 0, DW_IC_ENABLE); + regmap_write(dev->map, DW_IC_ENABLE, 0); } void __i2c_dw_disable(struct dw_i2c_dev *dev); -extern int i2c_dw_probe(struct dw_i2c_dev *dev); +extern void i2c_dw_configure_master(struct dw_i2c_dev *dev); +extern int i2c_dw_probe_master(struct dw_i2c_dev *dev); + #if IS_ENABLED(CONFIG_I2C_DESIGNWARE_SLAVE) +extern void i2c_dw_configure_slave(struct dw_i2c_dev *dev); extern int i2c_dw_probe_slave(struct dw_i2c_dev *dev); #else +static inline void i2c_dw_configure_slave(struct dw_i2c_dev *dev) { } static inline int i2c_dw_probe_slave(struct dw_i2c_dev *dev) { return -EINVAL; } #endif +static inline int i2c_dw_probe(struct dw_i2c_dev *dev) +{ + switch (dev->mode) { + case DW_IC_SLAVE: + return i2c_dw_probe_slave(dev); + case DW_IC_MASTER: + return i2c_dw_probe_master(dev); + default: + dev_err(dev->dev, "Wrong operation mode: %d\n", dev->mode); + return -EINVAL; + } +} + +static inline void i2c_dw_configure(struct dw_i2c_dev *dev) +{ + if (i2c_detect_slave_mode(dev->dev)) + i2c_dw_configure_slave(dev); + else + i2c_dw_configure_master(dev); +} + #if IS_ENABLED(CONFIG_I2C_DESIGNWARE_BAYTRAIL) extern int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev); #else static inline int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev) { return 0; } #endif + +int i2c_dw_validate_speed(struct dw_i2c_dev *dev); + +#if IS_ENABLED(CONFIG_ACPI) +int i2c_dw_acpi_configure(struct device *device); +void i2c_dw_acpi_adjust_bus_speed(struct device *device); +#else +static inline int i2c_dw_acpi_configure(struct device *device) { return -ENODEV; } +static inline void i2c_dw_acpi_adjust_bus_speed(struct device *device) {} +#endif |