drivers/staging/r8188eu/hal/HalPwrSeqCmd.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2007 - 2011 Realtek Corporation. */

/*++

Module Name:
	HalPwrSeqCmd.c

Abstract:
	Implement HW Power sequence configuration CMD handling routine for Realtek devices.

Major Change History:
	When       Who               What
	---------- ---------------   -------------------------------
	2011-10-26 Lucas            Modify to be compatible with SD4-CE driver.
	2011-07-07 Roger            Create.

--*/

#include "../include/HalPwrSeqCmd.h"

/*	Description: */
/*		This routine deals with the Power Configuration CMDs parsing
 *		for RTL8723/RTL8188E Series IC.
 *	Assumption:
 *		We should follow specific format which was released from HW SD.
 */
u8 HalPwrSeqCmdParsing(struct adapter *padapter, u8 cut_vers, u8 fab_vers,
		       u8 ifacetype, struct wl_pwr_cfg pwrseqcmd[])
{
	struct wl_pwr_cfg pwrcfgcmd = {0};
	u8 poll_bit = false;
	u32 aryidx = 0;
	u8 value = 0;
	u32 offset = 0;
	u32 poll_count = 0; /*  polling autoload done. */
	u32 max_poll_count = 5000;

	do {
		pwrcfgcmd = pwrseqcmd[aryidx];

		/* 2 Only Handle the command whose FAB, CUT, and Interface are matched */
		if ((GET_PWR_CFG_FAB_MASK(pwrcfgcmd) & fab_vers) &&
		    (GET_PWR_CFG_CUT_MASK(pwrcfgcmd) & cut_vers) &&
		    (GET_PWR_CFG_INTF_MASK(pwrcfgcmd) & ifacetype)) {
			switch (GET_PWR_CFG_CMD(pwrcfgcmd)) {
			case PWR_CMD_WRITE:
				offset = GET_PWR_CFG_OFFSET(pwrcfgcmd);

				/*  Read the value from system register */
				value = rtw_read8(padapter, offset);

				value &= ~(GET_PWR_CFG_MASK(pwrcfgcmd));
				value |= (GET_PWR_CFG_VALUE(pwrcfgcmd) & GET_PWR_CFG_MASK(pwrcfgcmd));

				/*  Write the value back to system register */
				rtw_write8(padapter, offset, value);
				break;
			case PWR_CMD_POLLING:
				poll_bit = false;
				offset = GET_PWR_CFG_OFFSET(pwrcfgcmd);
				do {
					value = rtw_read8(padapter, offset);

					value &= GET_PWR_CFG_MASK(pwrcfgcmd);
					if (value == (GET_PWR_CFG_VALUE(pwrcfgcmd) & GET_PWR_CFG_MASK(pwrcfgcmd)))
						poll_bit = true;
					else
						udelay(10);

					if (poll_count++ > max_poll_count) {
						DBG_88E("Fail to polling Offset[%#x]\n", offset);
						return false;
					}
				} while (!poll_bit);
				break;
			case PWR_CMD_DELAY:
				if (GET_PWR_CFG_VALUE(pwrcfgcmd) == PWRSEQ_DELAY_US)
					udelay(GET_PWR_CFG_OFFSET(pwrcfgcmd));
				else
					udelay(GET_PWR_CFG_OFFSET(pwrcfgcmd) * 1000);
				break;
			case PWR_CMD_END:
				/*  When this command is parsed, end the process */
				return true;
				break;
			default:
				break;
			}
		}

		aryidx++;/* Add Array Index */
	} while (1);
	return true;
}