diff options
Diffstat (limited to 'drivers/mmc/host/dw_mmc-socfpga.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc-socfpga.c | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/drivers/mmc/host/dw_mmc-socfpga.c b/drivers/mmc/host/dw_mmc-socfpga.c deleted file mode 100644 index 3e8e53ae3302..000000000000 --- a/drivers/mmc/host/dw_mmc-socfpga.c +++ /dev/null @@ -1,138 +0,0 @@ -/* - * Altera SoCFPGA Specific Extensions for Synopsys DW Multimedia Card Interface - * driver - * - * Copyright (C) 2012, Samsung Electronics Co., Ltd. - * Copyright (C) 2013 Altera Corporation - * - * 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. - * - * Taken from dw_mmc-exynos.c - */ -#include <linux/clk.h> -#include <linux/mfd/syscon.h> -#include <linux/mmc/host.h> -#include <linux/mmc/dw_mmc.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/regmap.h> - -#include "dw_mmc.h" -#include "dw_mmc-pltfm.h" - -#define SYSMGR_SDMMCGRP_CTRL_OFFSET 0x108 -#define DRV_CLK_PHASE_SHIFT_SEL_MASK 0x7 -#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel) \ - ((((smplsel) & 0x7) << 3) | (((drvsel) & 0x7) << 0)) - -/* SOCFPGA implementation specific driver private data */ -struct dw_mci_socfpga_priv_data { - u8 ciu_div; /* card interface unit divisor */ - u32 hs_timing; /* bitmask for CIU clock phase shift */ - struct regmap *sysreg; /* regmap for system manager register */ -}; - -static int dw_mci_socfpga_priv_init(struct dw_mci *host) -{ - return 0; -} - -static int dw_mci_socfpga_setup_clock(struct dw_mci *host) -{ - struct dw_mci_socfpga_priv_data *priv = host->priv; - - clk_disable_unprepare(host->ciu_clk); - regmap_write(priv->sysreg, SYSMGR_SDMMCGRP_CTRL_OFFSET, - priv->hs_timing); - clk_prepare_enable(host->ciu_clk); - - host->bus_hz /= (priv->ciu_div + 1); - return 0; -} - -static void dw_mci_socfpga_prepare_command(struct dw_mci *host, u32 *cmdr) -{ - struct dw_mci_socfpga_priv_data *priv = host->priv; - - if (priv->hs_timing & DRV_CLK_PHASE_SHIFT_SEL_MASK) - *cmdr |= SDMMC_CMD_USE_HOLD_REG; -} - -static int dw_mci_socfpga_parse_dt(struct dw_mci *host) -{ - struct dw_mci_socfpga_priv_data *priv; - struct device_node *np = host->dev->of_node; - u32 timing[2]; - u32 div = 0; - int ret; - - priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) { - dev_err(host->dev, "mem alloc failed for private data\n"); - return -ENOMEM; - } - - priv->sysreg = syscon_regmap_lookup_by_compatible("altr,sys-mgr"); - if (IS_ERR(priv->sysreg)) { - dev_err(host->dev, "regmap for altr,sys-mgr lookup failed.\n"); - return PTR_ERR(priv->sysreg); - } - - ret = of_property_read_u32(np, "altr,dw-mshc-ciu-div", &div); - if (ret) - dev_info(host->dev, "No dw-mshc-ciu-div specified, assuming 1"); - priv->ciu_div = div; - - ret = of_property_read_u32_array(np, - "altr,dw-mshc-sdr-timing", timing, 2); - if (ret) - return ret; - - priv->hs_timing = SYSMGR_SDMMC_CTRL_SET(timing[0], timing[1]); - host->priv = priv; - return 0; -} - -static const struct dw_mci_drv_data socfpga_drv_data = { - .init = dw_mci_socfpga_priv_init, - .setup_clock = dw_mci_socfpga_setup_clock, - .prepare_command = dw_mci_socfpga_prepare_command, - .parse_dt = dw_mci_socfpga_parse_dt, -}; - -static const struct of_device_id dw_mci_socfpga_match[] = { - { .compatible = "altr,socfpga-dw-mshc", - .data = &socfpga_drv_data, }, - {}, -}; -MODULE_DEVICE_TABLE(of, dw_mci_socfpga_match); - -static int dw_mci_socfpga_probe(struct platform_device *pdev) -{ - const struct dw_mci_drv_data *drv_data; - const struct of_device_id *match; - - match = of_match_node(dw_mci_socfpga_match, pdev->dev.of_node); - drv_data = match->data; - return dw_mci_pltfm_register(pdev, drv_data); -} - -static struct platform_driver dw_mci_socfpga_pltfm_driver = { - .probe = dw_mci_socfpga_probe, - .remove = __exit_p(dw_mci_pltfm_remove), - .driver = { - .name = "dwmmc_socfpga", - .of_match_table = dw_mci_socfpga_match, - .pm = &dw_mci_pltfm_pmops, - }, -}; - -module_platform_driver(dw_mci_socfpga_pltfm_driver); - -MODULE_DESCRIPTION("Altera SOCFPGA Specific DW-MSHC Driver Extension"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:dwmmc-socfpga"); |