add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mmc/host/rtsx_pci_sdmmc.c
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@@ -1,19 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* Realtek PCI-Express SD/MMC Card Interface driver
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  *
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  * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License as published by the
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- * Free Software Foundation; either version 2, or (at your option) any
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- * later version.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License along
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- * with this program; if not, see <http://www.gnu.org/licenses/>.
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  *
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  * Author:
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  *   Wei WANG <wei_wang@realsil.com.cn>
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@@ -49,10 +37,7 @@
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 	bool			double_clk;
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 	bool			eject;
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 	bool			initial_mode;
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-	int			power_state;
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-#define SDMMC_POWER_ON		1
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-#define SDMMC_POWER_OFF		0
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-
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+	int			prev_power_state;
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 	int			sg_count;
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 	s32			cookie;
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 	int			cookie_sg_count;
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@@ -697,11 +682,11 @@
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 static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
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 {
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-	int err, i;
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+	int i;
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 	u8 val = 0;
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 	for (i = 0; i < 100; i++) {
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-		err = rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
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+		rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
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 		if (val & SD_DATA_IDLE)
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 			return;
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@@ -914,13 +899,20 @@
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 	return err;
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 }
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-static int sd_power_on(struct realtek_pci_sdmmc *host)
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+static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
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 {
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 	struct rtsx_pcr *pcr = host->pcr;
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 	int err;
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-	if (host->power_state == SDMMC_POWER_ON)
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+	if (host->prev_power_state == MMC_POWER_ON)
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 		return 0;
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+
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+	if (host->prev_power_state == MMC_POWER_UP) {
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+		rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, 0);
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+		goto finish;
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+	}
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+
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+	msleep(100);
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 	rtsx_pci_init_cmd(pcr);
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 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
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@@ -940,11 +932,17 @@
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 	if (err < 0)
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 		return err;
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+	mdelay(1);
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+
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 	err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
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 	if (err < 0)
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 		return err;
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-	host->power_state = SDMMC_POWER_ON;
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+	/* send at least 74 clocks */
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+	rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, SD_CLK_TOGGLE_EN);
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+
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+finish:
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+	host->prev_power_state = power_mode;
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 	return 0;
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 }
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@@ -953,7 +951,7 @@
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 	struct rtsx_pcr *pcr = host->pcr;
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 	int err;
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-	host->power_state = SDMMC_POWER_OFF;
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+	host->prev_power_state = MMC_POWER_OFF;
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 	rtsx_pci_init_cmd(pcr);
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@@ -979,7 +977,7 @@
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 	if (power_mode == MMC_POWER_OFF)
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 		err = sd_power_off(host);
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 	else
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-		err = sd_power_on(host);
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+		err = sd_power_on(host, power_mode);
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 	return err;
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 }
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@@ -1358,6 +1356,8 @@
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 		mmc->caps |= MMC_CAP_1_8V_DDR;
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 	if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
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 		mmc->caps |= MMC_CAP_8_BIT_DATA;
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+	if (pcr->extra_caps & EXTRA_CAPS_NO_MMC)
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+		mmc->caps2 |= MMC_CAP2_NO_MMC;
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 }
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 static void realtek_init_host(struct realtek_pci_sdmmc *host)
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@@ -1369,7 +1369,7 @@
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 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
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 	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
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 		MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
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-		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_ERASE;
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+		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
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 	mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
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 	mmc->max_current_330 = 400;
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 	mmc->max_current_180 = 800;
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@@ -1414,10 +1414,11 @@
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 	host = mmc_priv(mmc);
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 	host->pcr = pcr;
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+	mmc->ios.power_delay_ms = 5;
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 	host->mmc = mmc;
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 	host->pdev = pdev;
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 	host->cookie = -1;
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-	host->power_state = SDMMC_POWER_OFF;
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+	host->prev_power_state = MMC_POWER_OFF;
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 	INIT_WORK(&host->work, sd_request);
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 	platform_set_drvdata(pdev, host);
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 	pcr->slots[RTSX_SD_CARD].p_dev = pdev;