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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* drivers/media/i2c/ccs-pll.h
*
* Generic MIPI CCS/SMIA/SMIA++ PLL calculator
*
* Copyright (C) 2020 Intel Corporation
* Copyright (C) 2012 Nokia Corporation
* Contact: Sakari Ailus <sakari.ailus@linux.intel.com>
*/
#ifndef CCS_PLL_H
#define CCS_PLL_H
/* CSI-2 or CCP-2 */
#define CCS_PLL_BUS_TYPE_CSI2_DPHY 0x00
#define CCS_PLL_BUS_TYPE_CSI2_CPHY 0x01
/* op pix clock is for all lanes in total normally */
#define CCS_PLL_FLAG_OP_PIX_CLOCK_PER_LANE (1 << 0)
#define CCS_PLL_FLAG_NO_OP_CLOCKS (1 << 1)
struct ccs_pll_branch_fr {
uint16_t pre_pll_clk_div;
uint16_t pll_multiplier;
uint32_t pll_ip_clk_freq_hz;
uint32_t pll_op_clk_freq_hz;
};
struct ccs_pll_branch_bk {
uint16_t sys_clk_div;
uint16_t pix_clk_div;
uint32_t sys_clk_freq_hz;
uint32_t pix_clk_freq_hz;
};
struct ccs_pll {
/* input values */
uint8_t bus_type;
struct {
uint8_t lanes;
} csi2;
unsigned long flags;
uint8_t binning_horizontal;
uint8_t binning_vertical;
uint8_t scale_m;
uint8_t scale_n;
uint8_t bits_per_pixel;
uint32_t link_freq;
uint32_t ext_clk_freq_hz;
/* output values */
struct ccs_pll_branch_fr vt_fr;
struct ccs_pll_branch_bk vt_bk;
struct ccs_pll_branch_bk op_bk;
uint32_t pixel_rate_csi;
uint32_t pixel_rate_pixel_array;
};
struct ccs_pll_branch_limits_fr {
uint16_t min_pre_pll_clk_div;
uint16_t max_pre_pll_clk_div;
uint32_t min_pll_ip_clk_freq_hz;
uint32_t max_pll_ip_clk_freq_hz;
uint16_t min_pll_multiplier;
uint16_t max_pll_multiplier;
uint32_t min_pll_op_clk_freq_hz;
uint32_t max_pll_op_clk_freq_hz;
};
struct ccs_pll_branch_limits_bk {
uint16_t min_sys_clk_div;
uint16_t max_sys_clk_div;
uint32_t min_sys_clk_freq_hz;
uint32_t max_sys_clk_freq_hz;
uint16_t min_pix_clk_div;
uint16_t max_pix_clk_div;
uint32_t min_pix_clk_freq_hz;
uint32_t max_pix_clk_freq_hz;
};
struct ccs_pll_limits {
/* Strict PLL limits */
uint32_t min_ext_clk_freq_hz;
uint32_t max_ext_clk_freq_hz;
struct ccs_pll_branch_limits_fr vt_fr;
struct ccs_pll_branch_limits_bk vt_bk;
struct ccs_pll_branch_limits_bk op_bk;
/* Other relevant limits */
uint32_t min_line_length_pck_bin;
uint32_t min_line_length_pck;
};
struct device;
int ccs_pll_calculate(struct device *dev, const struct ccs_pll_limits *limits,
struct ccs_pll *pll);
#endif /* CCS_PLL_H */
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