drivers/staging/rtl8188eu/hal/pwrseqcmd.c

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

#include <pwrseqcmd.h>
#include <usb_ops_linux.h>

/* This routine deals with the Power Configuration CMDs parsing
 * for RTL8723/RTL8188E Series IC.
 */
u8 rtl88eu_pwrseqcmdparsing(struct adapter *padapter, u8 cut_vers,
			    struct wl_pwr_cfg pwrseqcmd[])
{
	struct wl_pwr_cfg pwrcfgcmd;
	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];

		RT_TRACE(_module_hal_init_c_, _drv_info_,
			 ("rtl88eu_pwrseqcmdparsing: offset(%#x) cut_msk(%#x)"
			  " cmd(%#x)"
			  "msk(%#x) value(%#x)\n",
			 GET_PWR_CFG_OFFSET(pwrcfgcmd),
			 GET_PWR_CFG_CUT_MASK(pwrcfgcmd),
			 GET_PWR_CFG_CMD(pwrcfgcmd),
			 GET_PWR_CFG_MASK(pwrcfgcmd),
			 GET_PWR_CFG_VALUE(pwrcfgcmd)));

		/* Only Handle the command whose CUT is matched */
		if (GET_PWR_CFG_CUT_MASK(pwrcfgcmd) & cut_vers) {
			switch (GET_PWR_CFG_CMD(pwrcfgcmd)) {
			case PWR_CMD_READ:
				RT_TRACE(_module_hal_init_c_, _drv_info_,
					 ("rtl88eu_pwrseqcmdparsing: PWR_CMD_READ\n"));
				break;
			case PWR_CMD_WRITE:
				RT_TRACE(_module_hal_init_c_, _drv_info_,
					 ("rtl88eu_pwrseqcmdparsing: PWR_CMD_WRITE\n"));
				offset = GET_PWR_CFG_OFFSET(pwrcfgcmd);

				/*  Read the value from system register */
				value = usb_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 */
				usb_write8(padapter, offset, value);
				break;
			case PWR_CMD_POLLING:
				RT_TRACE(_module_hal_init_c_, _drv_info_,
					 ("rtl88eu_pwrseqcmdparsing: PWR_CMD_POLLING\n"));

				poll_bit = false;
				offset = GET_PWR_CFG_OFFSET(pwrcfgcmd);
				do {
					value = usb_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:
				RT_TRACE(_module_hal_init_c_, _drv_info_,
					 ("rtl88eu_pwrseqcmdparsing: PWR_CMD_DELAY\n"));
				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 */
				RT_TRACE(_module_hal_init_c_, _drv_info_,
					 ("rtl88eu_pwrseqcmdparsing: PWR_CMD_END\n"));
				return true;
			default:
				RT_TRACE(_module_hal_init_c_, _drv_err_,
					 ("rtl88eu_pwrseqcmdparsing: Unknown CMD!!\n"));
				break;
			}
		}

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