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