/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright ( c ) 2023 Code Construct
*
* Author : Jeremy Kerr < jk @ codeconstruct . com . au >
*/
#include <linux/clk.h>
#include <linux/i3c/master.h>
#include <linux/reset.h>
#include <linux/types.h>
#define DW_I3C_MAX_DEVS 32
struct dw_i3c_master_caps {
u8 cmdfifodepth;
u8 datafifodepth;
};
struct dw_i3c_dat_entry {
u8 addr;
bool is_i2c_addr;
struct i3c_dev_desc *ibi_dev;
};
struct dw_i3c_master {
struct i3c_master_controller base;
struct device *dev;
u16 maxdevs;
u16 datstartaddr;
u32 free_pos;
struct {
struct list_head list;
struct dw_i3c_xfer *cur;
spinlock_t lock;
} xferqueue;
struct dw_i3c_master_caps caps;
void __iomem *regs;
struct reset_control *core_rst;
struct clk *core_clk;
struct clk *pclk;
char version[5 ];
char type[5 ];
u32 sir_rej_mask;
bool i2c_slv_prsnt;
u32 dev_addr;
u32 i3c_pp_timing;
u32 i3c_od_timing;
u32 ext_lcnt_timing;
u32 bus_free_timing;
u32 i2c_fm_timing;
u32 i2c_fmp_timing;
u32 quirks;
/*
* Per - device hardware data , used to manage the device address table
* ( DAT )
*
* Locking : the devs array may be referenced in IRQ context while
* processing an IBI . However , IBIs ( for a specific device , which
* implies a specific DAT entry ) can only happen while interrupts are
* requested for that device , which is serialised against other
* insertions / removals from the array by the global i3c infrastructure .
* So , devs_lock protects against concurrent updates to devs - > ibi_dev
* between request_ibi / free_ibi and the IBI irq event .
*/
struct dw_i3c_dat_entry devs[DW_I3C_MAX_DEVS];
spinlock_t devs_lock;
/* platform-specific data */
const struct dw_i3c_platform_ops *platform_ops;
struct work_struct hj_work;
};
struct dw_i3c_platform_ops {
/*
* Called on early bus init : the i3c has been set up , but before any
* transactions have taken place . Platform implementations may use to
* perform actual device enabling with the i3c core ready .
*/
int (*init)(struct dw_i3c_master *i3c);
/*
* Initialise a DAT entry to enable / disable IBIs . Allows the platform
* to perform any device workarounds on the DAT entry before
* inserting into the hardware table .
*
* Called with the DAT lock held ; must not sleep .
*/
void (*set_dat_ibi)(struct dw_i3c_master *i3c,
struct i3c_dev_desc *dev, bool enable, u32 *reg);
};
extern int dw_i3c_common_probe(struct dw_i3c_master *master,
struct platform_device *pdev);
extern void dw_i3c_common_remove(struct dw_i3c_master *master);
Messung V0.5 in Prozent C=89 H=100 G=94
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland