1  /* SPDX-License-Identifier: GPL-2.0+ */
2  /*
3   * Copyright (C) 2022 Amarula Solutions(India)
4   * Author: Jagan Teki <jagan@amarulasolutions.com>
5   */
6  
7  #ifndef __SAMSUNG_DSIM__
8  #define __SAMSUNG_DSIM__
9  
10  #include <linux/gpio/consumer.h>
11  #include <linux/regulator/consumer.h>
12  
13  #include <drm/drm_atomic_helper.h>
14  #include <drm/drm_bridge.h>
15  #include <drm/drm_mipi_dsi.h>
16  #include <drm/drm_of.h>
17  
18  struct platform_device;
19  struct samsung_dsim;
20  
21  #define DSIM_STATE_ENABLED		BIT(0)
22  #define DSIM_STATE_INITIALIZED		BIT(1)
23  #define DSIM_STATE_CMD_LPM		BIT(2)
24  #define DSIM_STATE_VIDOUT_AVAILABLE	BIT(3)
25  
26  enum samsung_dsim_type {
27  	DSIM_TYPE_EXYNOS3250,
28  	DSIM_TYPE_EXYNOS4210,
29  	DSIM_TYPE_EXYNOS5410,
30  	DSIM_TYPE_EXYNOS5422,
31  	DSIM_TYPE_EXYNOS5433,
32  	DSIM_TYPE_IMX8MM,
33  	DSIM_TYPE_IMX8MP,
34  	DSIM_TYPE_COUNT,
35  };
36  
37  #define samsung_dsim_hw_is_exynos(hw) \
38  	((hw) >= DSIM_TYPE_EXYNOS3250 && (hw) <= DSIM_TYPE_EXYNOS5433)
39  
40  struct samsung_dsim_transfer {
41  	struct list_head list;
42  	struct completion completed;
43  	int result;
44  	struct mipi_dsi_packet packet;
45  	u16 flags;
46  	u16 tx_done;
47  
48  	u8 *rx_payload;
49  	u16 rx_len;
50  	u16 rx_done;
51  };
52  
53  struct samsung_dsim_driver_data {
54  	const unsigned int *reg_ofs;
55  	unsigned int plltmr_reg;
56  	unsigned int has_freqband:1;
57  	unsigned int has_clklane_stop:1;
58  	unsigned int has_broken_fifoctrl_emptyhdr:1;
59  	unsigned int num_clks;
60  	unsigned int min_freq;
61  	unsigned int max_freq;
62  	unsigned int wait_for_reset;
63  	unsigned int num_bits_resol;
64  	unsigned int pll_p_offset;
65  	const unsigned int *reg_values;
66  	unsigned int pll_fin_min;
67  	unsigned int pll_fin_max;
68  	u16 m_min;
69  	u16 m_max;
70  };
71  
72  struct samsung_dsim_host_ops {
73  	int (*register_host)(struct samsung_dsim *dsim);
74  	void (*unregister_host)(struct samsung_dsim *dsim);
75  	int (*attach)(struct samsung_dsim *dsim, struct mipi_dsi_device *device);
76  	void (*detach)(struct samsung_dsim *dsim, struct mipi_dsi_device *device);
77  	irqreturn_t (*te_irq_handler)(struct samsung_dsim *dsim);
78  };
79  
80  struct samsung_dsim_plat_data {
81  	enum samsung_dsim_type hw_type;
82  	const struct samsung_dsim_host_ops *host_ops;
83  };
84  
85  struct samsung_dsim {
86  	struct mipi_dsi_host dsi_host;
87  	struct drm_bridge bridge;
88  	struct drm_bridge *out_bridge;
89  	struct device *dev;
90  	struct drm_display_mode mode;
91  
92  	void __iomem *reg_base;
93  	struct phy *phy;
94  	struct clk **clks;
95  	struct clk *pll_clk;
96  	struct regulator_bulk_data supplies[2];
97  	int irq;
98  	struct gpio_desc *te_gpio;
99  
100  	u32 pll_clk_rate;
101  	u32 burst_clk_rate;
102  	u32 hs_clock;
103  	u32 esc_clk_rate;
104  	u32 lanes;
105  	u32 mode_flags;
106  	u32 format;
107  
108  	bool swap_dn_dp_clk;
109  	bool swap_dn_dp_data;
110  	int state;
111  	struct drm_property *brightness;
112  	struct completion completed;
113  
114  	spinlock_t transfer_lock; /* protects transfer_list */
115  	struct list_head transfer_list;
116  
117  	const struct samsung_dsim_driver_data *driver_data;
118  	const struct samsung_dsim_plat_data *plat_data;
119  
120  	void *priv;
121  };
122  
123  extern int samsung_dsim_probe(struct platform_device *pdev);
124  extern void samsung_dsim_remove(struct platform_device *pdev);
125  extern const struct dev_pm_ops samsung_dsim_pm_ops;
126  
127  #endif /* __SAMSUNG_DSIM__ */
128