add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mmc/host/rtsx_pci_sdmmc.c
..
..
@@ -1,19 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
1
2
 /* Realtek PCI-Express SD/MMC Card Interface driver
2
3
  *
3
4
  * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
4
- *
5
- * This program is free software; you can redistribute it and/or modify it
6
- * under the terms of the GNU General Public License as published by the
7
- * Free Software Foundation; either version 2, or (at your option) any
8
- * later version.
9
- *
10
- * This program is distributed in the hope that it will be useful, but
11
- * WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
- * General Public License for more details.
14
- *
15
- * You should have received a copy of the GNU General Public License along
16
- * with this program; if not, see <http://www.gnu.org/licenses/>.
17
5
  *
18
6
  * Author:
19
7
  *   Wei WANG <wei_wang@realsil.com.cn>
..
..
@@ -49,10 +37,7 @@
49
37
 	bool			double_clk;
50
38
 	bool			eject;
51
39
 	bool			initial_mode;
52
-	int			power_state;
53
-#define SDMMC_POWER_ON		1
54
-#define SDMMC_POWER_OFF		0
55
-
40
+	int			prev_power_state;
56
41
 	int			sg_count;
57
42
 	s32			cookie;
58
43
 	int			cookie_sg_count;
..
..
@@ -697,11 +682,11 @@
697
682
 
698
683
 static void sd_wait_data_idle(struct realtek_pci_sdmmc *host)
699
684
 {
700
-	int err, i;
685
+	int i;
701
686
 	u8 val = 0;
702
687
 
703
688
 	for (i = 0; i < 100; i++) {
704
-		err = rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
689
+		rtsx_pci_read_register(host->pcr, SD_DATA_STATE, &val);
705
690
 		if (val & SD_DATA_IDLE)
706
691
 			return;
707
692
 
..
..
@@ -914,13 +899,20 @@
914
899
 	return err;
915
900
 }
916
901
 
917
-static int sd_power_on(struct realtek_pci_sdmmc *host)
902
+static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
918
903
 {
919
904
 	struct rtsx_pcr *pcr = host->pcr;
920
905
 	int err;
921
906
 
922
-	if (host->power_state == SDMMC_POWER_ON)
907
+	if (host->prev_power_state == MMC_POWER_ON)
923
908
 		return 0;
909
+
910
+	if (host->prev_power_state == MMC_POWER_UP) {
911
+		rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, 0);
912
+		goto finish;
913
+	}
914
+
915
+	msleep(100);
924
916
 
925
917
 	rtsx_pci_init_cmd(pcr);
926
918
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL);
..
..
@@ -940,11 +932,17 @@
940
932
 	if (err < 0)
941
933
 		return err;
942
934
 
935
+	mdelay(1);
936
+
943
937
 	err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
944
938
 	if (err < 0)
945
939
 		return err;
946
940
 
947
-	host->power_state = SDMMC_POWER_ON;
941
+	/* send at least 74 clocks */
942
+	rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, SD_CLK_TOGGLE_EN);
943
+
944
+finish:
945
+	host->prev_power_state = power_mode;
948
946
 	return 0;
949
947
 }
950
948
 
..
..
@@ -953,7 +951,7 @@
953
951
 	struct rtsx_pcr *pcr = host->pcr;
954
952
 	int err;
955
953
 
956
-	host->power_state = SDMMC_POWER_OFF;
954
+	host->prev_power_state = MMC_POWER_OFF;
957
955
 
958
956
 	rtsx_pci_init_cmd(pcr);
959
957
 
..
..
@@ -979,7 +977,7 @@
979
977
 	if (power_mode == MMC_POWER_OFF)
980
978
 		err = sd_power_off(host);
981
979
 	else
982
-		err = sd_power_on(host);
980
+		err = sd_power_on(host, power_mode);
983
981
 
984
982
 	return err;
985
983
 }
..
..
@@ -1358,6 +1356,8 @@
1358
1356
 		mmc->caps |= MMC_CAP_1_8V_DDR;
1359
1357
 	if (pcr->extra_caps & EXTRA_CAPS_MMC_8BIT)
1360
1358
 		mmc->caps |= MMC_CAP_8_BIT_DATA;
1359
+	if (pcr->extra_caps & EXTRA_CAPS_NO_MMC)
1360
+		mmc->caps2 |= MMC_CAP2_NO_MMC;
1361
1361
 }
1362
1362
 
1363
1363
 static void realtek_init_host(struct realtek_pci_sdmmc *host)
..
..
@@ -1369,7 +1369,7 @@
1369
1369
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1370
1370
 	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
1371
1371
 		MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
1372
-		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_ERASE;
1372
+		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
1373
1373
 	mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
1374
1374
 	mmc->max_current_330 = 400;
1375
1375
 	mmc->max_current_180 = 800;
..
..
@@ -1414,10 +1414,11 @@
1414
1414
 
1415
1415
 	host = mmc_priv(mmc);
1416
1416
 	host->pcr = pcr;
1417
+	mmc->ios.power_delay_ms = 5;
1417
1418
 	host->mmc = mmc;
1418
1419
 	host->pdev = pdev;
1419
1420
 	host->cookie = -1;
1420
-	host->power_state = SDMMC_POWER_OFF;
1421
+	host->prev_power_state = MMC_POWER_OFF;
1421
1422
 	INIT_WORK(&host->work, sd_request);
1422
1423
 	platform_set_drvdata(pdev, host);
1423
1424
 	pcr->slots[RTSX_SD_CARD].p_dev = pdev;
..
..
@@ -1491,6 +1492,7 @@
1491
1492
 	.id_table       = rtsx_pci_sdmmc_ids,
1492
1493
 	.driver		= {
1493
1494
 		.name	= DRV_NAME_RTSX_PCI_SDMMC,
1495
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
1494
1496
 	},
1495
1497
 };
1496
1498
 module_platform_driver(rtsx_pci_sdmmc_driver);