diff options
Diffstat (limited to 'drivers/mmc/host/dw_mmc-pltfm.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc-pltfm.c | 96 |
1 files changed, 51 insertions, 45 deletions
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c index ee525565aa77..de820ffd2133 100644 --- a/drivers/mmc/host/dw_mmc-pltfm.c +++ b/drivers/mmc/host/dw_mmc-pltfm.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Synopsys DesignWare Multimedia Card Interface driver * * Copyright (C) 2009 NXP Semiconductors * Copyright (C) 2009, 2010 Imagination Technologies Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/err.h> @@ -16,29 +12,26 @@ #include <linux/io.h> #include <linux/irq.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> -#include <linux/mmc/dw_mmc.h> #include <linux/of.h> +#include <linux/mfd/altera-sysmgr.h> +#include <linux/regmap.h> #include "dw_mmc.h" +#include "dw_mmc-pltfm.h" -static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr) -{ - *cmdr |= SDMMC_CMD_USE_HOLD_REG; -} - -static const struct dw_mci_drv_data rockchip_drv_data = { - .prepare_command = dw_mci_rockchip_prepare_command, -}; +#define SOCFPGA_DW_MMC_CLK_PHASE_STEP 45 +#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel, reg_shift) \ + ((((smplsel) & 0x7) << reg_shift) | (((drvsel) & 0x7) << 0)) int dw_mci_pltfm_register(struct platform_device *pdev, const struct dw_mci_drv_data *drv_data) { struct dw_mci *host; struct resource *regs; - int ret; host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); if (!host) @@ -53,51 +46,64 @@ int dw_mci_pltfm_register(struct platform_device *pdev, host->irq_flags = 0; host->pdata = pdev->dev.platform_data; - regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - host->regs = devm_ioremap_resource(&pdev->dev, regs); + host->regs = devm_platform_get_and_ioremap_resource(pdev, 0, ®s); if (IS_ERR(host->regs)) return PTR_ERR(host->regs); - if (drv_data && drv_data->init) { - ret = drv_data->init(host); - if (ret) - return ret; - } + /* Get registers' physical base address */ + host->phy_regs = regs->start; platform_set_drvdata(pdev, host); return dw_mci_probe(host); } EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); -#ifdef CONFIG_PM_SLEEP -/* - * TODO: we should probably disable the clock to the card in the suspend path. - */ -static int dw_mci_pltfm_suspend(struct device *dev) +const struct dev_pm_ops dw_mci_pltfm_pmops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend, + dw_mci_runtime_resume, + NULL) +}; +EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); + +static int dw_mci_socfpga_priv_init(struct dw_mci *host) { - struct dw_mci *host = dev_get_drvdata(dev); + struct device_node *np = host->dev->of_node; + struct regmap *sys_mgr_base_addr; + u32 clk_phase[2] = {0}, reg_offset, reg_shift; + int i, rc, hs_timing; + + rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0); + if (rc < 0) + return 0; + + sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon"); + if (IS_ERR(sys_mgr_base_addr)) { + dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n"); + return 0; + } - return dw_mci_suspend(host); -} + of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset); + of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift); -static int dw_mci_pltfm_resume(struct device *dev) -{ - struct dw_mci *host = dev_get_drvdata(dev); + for (i = 0; i < ARRAY_SIZE(clk_phase); i++) + clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP; + + hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift); + regmap_write(sys_mgr_base_addr, reg_offset, hs_timing); - return dw_mci_resume(host); + return 0; } -#else -#define dw_mci_pltfm_suspend NULL -#define dw_mci_pltfm_resume NULL -#endif /* CONFIG_PM_SLEEP */ -SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); -EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); +static const struct dw_mci_drv_data socfpga_drv_data = { + .init = dw_mci_socfpga_priv_init, +}; static const struct of_device_id dw_mci_pltfm_match[] = { { .compatible = "snps,dw-mshc", }, - { .compatible = "rockchip,rk2928-dw-mshc", - .data = &rockchip_drv_data }, + { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, }, + { .compatible = "img,pistachio-dw-mshc", }, {}, }; MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); @@ -115,12 +121,11 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev) return dw_mci_pltfm_register(pdev, drv_data); } -int dw_mci_pltfm_remove(struct platform_device *pdev) +void dw_mci_pltfm_remove(struct platform_device *pdev) { struct dw_mci *host = platform_get_drvdata(pdev); dw_mci_remove(host); - return 0; } EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); @@ -129,7 +134,8 @@ static struct platform_driver dw_mci_pltfm_driver = { .remove = dw_mci_pltfm_remove, .driver = { .name = "dw_mmc", - .of_match_table = of_match_ptr(dw_mci_pltfm_match), + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = dw_mci_pltfm_match, .pm = &dw_mci_pltfm_pmops, }, }; |