182c29810SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2985b1aa0SMike Rapoport /* 3985b1aa0SMike Rapoport * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC 4985b1aa0SMike Rapoport * 5985b1aa0SMike Rapoport * Author: Saeed Bishara <saeed@marvell.com> 6985b1aa0SMike Rapoport * Mike Rapoport <mike@compulab.co.il> 7985b1aa0SMike Rapoport * Based on sdhci-cns3xxx.c 8985b1aa0SMike Rapoport */ 9985b1aa0SMike Rapoport 1030b87c60SSebastian Hesselbarth #include <linux/clk.h> 1130b87c60SSebastian Hesselbarth #include <linux/err.h> 12f8ec589bSRussell King #include <linux/io.h> 13985b1aa0SMike Rapoport #include <linux/mmc/host.h> 14f8ec589bSRussell King #include <linux/module.h> 154ee7ed0dSSebastian Hesselbarth #include <linux/of.h> 16985b1aa0SMike Rapoport 17985b1aa0SMike Rapoport #include "sdhci-pltfm.h" 18985b1aa0SMike Rapoport 19985b1aa0SMike Rapoport static u16 sdhci_dove_readw(struct sdhci_host *host, int reg) 20985b1aa0SMike Rapoport { 21985b1aa0SMike Rapoport u16 ret; 22985b1aa0SMike Rapoport 23985b1aa0SMike Rapoport switch (reg) { 24985b1aa0SMike Rapoport case SDHCI_HOST_VERSION: 25985b1aa0SMike Rapoport case SDHCI_SLOT_INT_STATUS: 26985b1aa0SMike Rapoport /* those registers don't exist */ 27985b1aa0SMike Rapoport return 0; 28985b1aa0SMike Rapoport default: 29985b1aa0SMike Rapoport ret = readw(host->ioaddr + reg); 30985b1aa0SMike Rapoport } 31985b1aa0SMike Rapoport return ret; 32985b1aa0SMike Rapoport } 33985b1aa0SMike Rapoport 34985b1aa0SMike Rapoport static u32 sdhci_dove_readl(struct sdhci_host *host, int reg) 35985b1aa0SMike Rapoport { 36985b1aa0SMike Rapoport u32 ret; 37985b1aa0SMike Rapoport 38f8ec589bSRussell King ret = readl(host->ioaddr + reg); 39f8ec589bSRussell King 40985b1aa0SMike Rapoport switch (reg) { 41985b1aa0SMike Rapoport case SDHCI_CAPABILITIES: 42985b1aa0SMike Rapoport /* Mask the support for 3.0V */ 43985b1aa0SMike Rapoport ret &= ~SDHCI_CAN_VDD_300; 44985b1aa0SMike Rapoport break; 45985b1aa0SMike Rapoport } 46985b1aa0SMike Rapoport return ret; 47985b1aa0SMike Rapoport } 48985b1aa0SMike Rapoport 49c915568dSLars-Peter Clausen static const struct sdhci_ops sdhci_dove_ops = { 50985b1aa0SMike Rapoport .read_w = sdhci_dove_readw, 51985b1aa0SMike Rapoport .read_l = sdhci_dove_readl, 521771059cSRussell King .set_clock = sdhci_set_clock, 532317f56cSRussell King .set_bus_width = sdhci_set_bus_width, 5403231f9bSRussell King .reset = sdhci_reset, 5596d7b78cSRussell King .set_uhs_signaling = sdhci_set_uhs_signaling, 56985b1aa0SMike Rapoport }; 57985b1aa0SMike Rapoport 581db5eebfSLars-Peter Clausen static const struct sdhci_pltfm_data sdhci_dove_pdata = { 59985b1aa0SMike Rapoport .ops = &sdhci_dove_ops, 60985b1aa0SMike Rapoport .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER | 61985b1aa0SMike Rapoport SDHCI_QUIRK_NO_BUSY_IRQ | 62985b1aa0SMike Rapoport SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | 63a9ca1d54SSebastian Hesselbarth SDHCI_QUIRK_FORCE_DMA | 64a9ca1d54SSebastian Hesselbarth SDHCI_QUIRK_NO_HISPD_BIT, 65985b1aa0SMike Rapoport }; 6685d6509dSShawn Guo 67c3be1efdSBill Pemberton static int sdhci_dove_probe(struct platform_device *pdev) 6885d6509dSShawn Guo { 6930b87c60SSebastian Hesselbarth struct sdhci_host *host; 7030b87c60SSebastian Hesselbarth struct sdhci_pltfm_host *pltfm_host; 7130b87c60SSebastian Hesselbarth int ret; 7230b87c60SSebastian Hesselbarth 730e748234SChristian Daudt host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0); 74c5ee2490SSebastian Hesselbarth if (IS_ERR(host)) 75c5ee2490SSebastian Hesselbarth return PTR_ERR(host); 76ee3298a2SRussell King - ARM Linux 7730b87c60SSebastian Hesselbarth pltfm_host = sdhci_priv(host); 7835daeedeSKevin Hao pltfm_host->clk = devm_clk_get(&pdev->dev, NULL); 7930b87c60SSebastian Hesselbarth 8035daeedeSKevin Hao if (!IS_ERR(pltfm_host->clk)) 8135daeedeSKevin Hao clk_prepare_enable(pltfm_host->clk); 82c430689fSRussell King 83c5ee2490SSebastian Hesselbarth ret = mmc_of_parse(host->mmc); 84c5ee2490SSebastian Hesselbarth if (ret) 85c5ee2490SSebastian Hesselbarth goto err_sdhci_add; 86c430689fSRussell King 87c430689fSRussell King ret = sdhci_add_host(host); 88c430689fSRussell King if (ret) 89c430689fSRussell King goto err_sdhci_add; 90c430689fSRussell King 9130b87c60SSebastian Hesselbarth return 0; 9230b87c60SSebastian Hesselbarth 93c430689fSRussell King err_sdhci_add: 9435daeedeSKevin Hao clk_disable_unprepare(pltfm_host->clk); 95c430689fSRussell King sdhci_pltfm_free(pdev); 9630b87c60SSebastian Hesselbarth return ret; 9785d6509dSShawn Guo } 9885d6509dSShawn Guo 99498d83e7SBill Pemberton static const struct of_device_id sdhci_dove_of_match_table[] = { 1004ee7ed0dSSebastian Hesselbarth { .compatible = "marvell,dove-sdhci", }, 1014ee7ed0dSSebastian Hesselbarth {} 1024ee7ed0dSSebastian Hesselbarth }; 1034ee7ed0dSSebastian Hesselbarth MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table); 1044ee7ed0dSSebastian Hesselbarth 10585d6509dSShawn Guo static struct platform_driver sdhci_dove_driver = { 10685d6509dSShawn Guo .driver = { 10785d6509dSShawn Guo .name = "sdhci-dove", 10821b2cec6SDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS, 109fa243f64SUlf Hansson .pm = &sdhci_pltfm_pmops, 1105941fd07SSachin Kamat .of_match_table = sdhci_dove_of_match_table, 11185d6509dSShawn Guo }, 11285d6509dSShawn Guo .probe = sdhci_dove_probe, 113caebcae9SKevin Hao .remove = sdhci_pltfm_unregister, 11485d6509dSShawn Guo }; 11585d6509dSShawn Guo 116d1f81a64SAxel Lin module_platform_driver(sdhci_dove_driver); 11785d6509dSShawn Guo 11885d6509dSShawn Guo MODULE_DESCRIPTION("SDHCI driver for Dove"); 11985d6509dSShawn Guo MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, " 12085d6509dSShawn Guo "Mike Rapoport <mike@compulab.co.il>"); 12185d6509dSShawn Guo MODULE_LICENSE("GPL v2"); 122