[PATCH 2/2] mmc: remove sirf prima/atlas driver
Barry Song
baohua at kernel.org
Wed Jan 20 16:25:03 EST 2021
Arnd Bergmann <arnd at kernel.org> 于2021年1月21日周四 上午3:28写道：
>
> From: Arnd Bergmann <arnd at arndb.de>
>
> The CSR SiRF prima2/atlas platforms are getting removed, so this driver
> is no longer needed.
>
> Cc: Barry Song <baohua at kernel.org>
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
Acked-by: Barry Song <baohua at kernel.org>
> ---
> .../devicetree/bindings/mmc/sdhci-sirf.txt | 18 --
> drivers/mmc/host/Kconfig | 12 -
> drivers/mmc/host/Makefile | 1 -
> drivers/mmc/host/sdhci-sirf.c | 235 ------------------
> 4 files changed, 266 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/mmc/sdhci-sirf.txt
> delete mode 100644 drivers/mmc/host/sdhci-sirf.c
>
> diff --git a/Documentation/devicetree/bindings/mmc/sdhci-sirf.txt b/Documentation/devicetree/bindings/mmc/sdhci-sirf.txt
> deleted file mode 100644
> index dd6ed464bcb8..000000000000
> --- a/Documentation/devicetree/bindings/mmc/sdhci-sirf.txt
> +++ /dev/null
> @@ -1,18 +0,0 @@
> -* SiRFprimII/marco/atlas6 SDHCI Controller
> -
> -This file documents differences between the core properties in mmc.txt
> -and the properties used by the sdhci-sirf driver.
> -
> -Required properties:
> -- compatible: sirf,prima2-sdhc
> -
> -Optional properties:
> -- cd-gpios: card detect gpio, with zero flags.
> -
> -Example:
> -
> - sd0: sdhci at 56000000 {
> - compatible = "sirf,prima2-sdhc";
> - reg = <0xcd000000 0x100000>;
> - cd-gpios = <&gpio 6 0>;
> - };
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 255d37e8bd3a..b67f6028b6f3 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -312,18 +312,6 @@ config MMC_SDHCI_S3C
>
> If unsure, say N.
>
> -config MMC_SDHCI_SIRF
> - tristate "SDHCI support on CSR SiRFprimaII and SiRFmarco SoCs"
> - depends on ARCH_SIRF || COMPILE_TEST
> - depends on MMC_SDHCI_PLTFM
> - select MMC_SDHCI_IO_ACCESSORS
> - help
> - This selects the SDHCI support for SiRF System-on-Chip devices.
> -
> - If you have a controller with this interface, say Y or M here.
> -
> - If unsure, say N.
> -
> config MMC_SDHCI_PXAV3
> tristate "Marvell MMP2 SD Host Controller support (PXAV3)"
> depends on CLKDEV_LOOKUP
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index 43136d382d5f..d2ec428cc808 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -19,7 +19,6 @@ obj-$(CONFIG_MMC_SDHCI_ACPI) += sdhci-acpi.o
> obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o
> obj-$(CONFIG_MMC_SDHCI_PXAV2) += sdhci-pxav2.o
> obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
> -obj-$(CONFIG_MMC_SDHCI_SIRF) += sdhci-sirf.o
> obj-$(CONFIG_MMC_SDHCI_F_SDH30) += sdhci_f_sdh30.o
> obj-$(CONFIG_MMC_SDHCI_MILBEAUT) += sdhci-milbeaut.o
> obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
> diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c
> deleted file mode 100644
> index e9b347b3af7e..000000000000
> --- a/drivers/mmc/host/sdhci-sirf.c
> +++ /dev/null
> @@ -1,235 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-or-later
> -/*
> - * SDHCI support for SiRF primaII and marco SoCs
> - *
> - * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
> - */
> -
> -#include <linux/delay.h>
> -#include <linux/device.h>
> -#include <linux/mmc/host.h>
> -#include <linux/module.h>
> -#include <linux/of.h>
> -#include <linux/mmc/slot-gpio.h>
> -#include "sdhci-pltfm.h"
> -
> -#define SDHCI_CLK_DELAY_SETTING 0x4C
> -#define SDHCI_SIRF_8BITBUS BIT(3)
> -#define SIRF_TUNING_COUNT 16384
> -
> -static void sdhci_sirf_set_bus_width(struct sdhci_host *host, int width)
> -{
> - u8 ctrl;
> -
> - ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
> - ctrl &= ~(SDHCI_CTRL_4BITBUS | SDHCI_SIRF_8BITBUS);
> -
> - /*
> - * CSR atlas7 and prima2 SD host version is not 3.0
> - * 8bit-width enable bit of CSR SD hosts is 3,
> - * while stardard hosts use bit 5
> - */
> - if (width == MMC_BUS_WIDTH_8)
> - ctrl |= SDHCI_SIRF_8BITBUS;
> - else if (width == MMC_BUS_WIDTH_4)
> - ctrl |= SDHCI_CTRL_4BITBUS;
> -
> - sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
> -}
> -
> -static u32 sdhci_sirf_readl_le(struct sdhci_host *host, int reg)
> -{
> - u32 val = readl(host->ioaddr + reg);
> -
> - if (unlikely((reg == SDHCI_CAPABILITIES_1) &&
> - (host->mmc->caps & MMC_CAP_UHS_SDR50))) {
> - /* fake CAP_1 register */
> - val = SDHCI_SUPPORT_DDR50 |
> - SDHCI_SUPPORT_SDR50 | SDHCI_USE_SDR50_TUNING;
> - }
> -
> - if (unlikely(reg == SDHCI_SLOT_INT_STATUS)) {
> - u32 prss = val;
> - /* fake chips as V3.0 host conreoller */
> - prss &= ~(0xFF << 16);
> - val = prss | (SDHCI_SPEC_300 << 16);
> - }
> - return val;
> -}
> -
> -static u16 sdhci_sirf_readw_le(struct sdhci_host *host, int reg)
> -{
> - u16 ret = 0;
> -
> - ret = readw(host->ioaddr + reg);
> -
> - if (unlikely(reg == SDHCI_HOST_VERSION)) {
> - ret = readw(host->ioaddr + SDHCI_HOST_VERSION);
> - ret |= SDHCI_SPEC_300;
> - }
> -
> - return ret;
> -}
> -
> -static int sdhci_sirf_execute_tuning(struct sdhci_host *host, u32 opcode)
> -{
> - int tuning_seq_cnt = 3;
> - int phase;
> - u8 tuned_phase_cnt = 0;
> - int rc = 0, longest_range = 0;
> - int start = -1, end = 0, tuning_value = -1, range = 0;
> - u16 clock_setting;
> - struct mmc_host *mmc = host->mmc;
> -
> - clock_setting = sdhci_readw(host, SDHCI_CLK_DELAY_SETTING);
> - clock_setting &= ~0x3fff;
> -
> -retry:
> - phase = 0;
> - tuned_phase_cnt = 0;
> - do {
> - sdhci_writel(host,
> - clock_setting | phase,
> - SDHCI_CLK_DELAY_SETTING);
> -
> - if (!mmc_send_tuning(mmc, opcode, NULL)) {
> - /* Tuning is successful at this tuning point */
> - tuned_phase_cnt++;
> - dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n",
> - mmc_hostname(mmc), phase);
> - if (start == -1)
> - start = phase;
> - end = phase;
> - range++;
> - if (phase == (SIRF_TUNING_COUNT - 1)
> - && range > longest_range)
> - tuning_value = (start + end) / 2;
> - } else {
> - dev_dbg(mmc_dev(mmc), "%s: Found bad phase = %d\n",
> - mmc_hostname(mmc), phase);
> - if (range > longest_range) {
> - tuning_value = (start + end) / 2;
> - longest_range = range;
> - }
> - start = -1;
> - end = range = 0;
> - }
> - } while (++phase < SIRF_TUNING_COUNT);
> -
> - if (tuned_phase_cnt && tuning_value > 0) {
> - /*
> - * Finally set the selected phase in delay
> - * line hw block.
> - */
> - phase = tuning_value;
> - sdhci_writel(host,
> - clock_setting | phase,
> - SDHCI_CLK_DELAY_SETTING);
> -
> - dev_dbg(mmc_dev(mmc), "%s: Setting the tuning phase to %d\n",
> - mmc_hostname(mmc), phase);
> - } else {
> - if (--tuning_seq_cnt)
> - goto retry;
> - /* Tuning failed */
> - dev_dbg(mmc_dev(mmc), "%s: No tuning point found\n",
> - mmc_hostname(mmc));
> - rc = -EIO;
> - }
> -
> - return rc;
> -}
> -
> -static const struct sdhci_ops sdhci_sirf_ops = {
> - .read_l = sdhci_sirf_readl_le,
> - .read_w = sdhci_sirf_readw_le,
> - .platform_execute_tuning = sdhci_sirf_execute_tuning,
> - .set_clock = sdhci_set_clock,
> - .get_max_clock = sdhci_pltfm_clk_get_max_clock,
> - .set_bus_width = sdhci_sirf_set_bus_width,
> - .reset = sdhci_reset,
> - .set_uhs_signaling = sdhci_set_uhs_signaling,
> -};
> -
> -static const struct sdhci_pltfm_data sdhci_sirf_pdata = {
> - .ops = &sdhci_sirf_ops,
> - .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
> - SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
> - SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
> - SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
> - .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> -};
> -
> -static int sdhci_sirf_probe(struct platform_device *pdev)
> -{
> - struct sdhci_host *host;
> - struct sdhci_pltfm_host *pltfm_host;
> - struct clk *clk;
> - int ret;
> -
> - clk = devm_clk_get(&pdev->dev, NULL);
> - if (IS_ERR(clk)) {
> - dev_err(&pdev->dev, "unable to get clock");
> - return PTR_ERR(clk);
> - }
> -
> - host = sdhci_pltfm_init(pdev, &sdhci_sirf_pdata, 0);
> - if (IS_ERR(host))
> - return PTR_ERR(host);
> -
> - pltfm_host = sdhci_priv(host);
> - pltfm_host->clk = clk;
> -
> - sdhci_get_of_property(pdev);
> -
> - ret = clk_prepare_enable(pltfm_host->clk);
> - if (ret)
> - goto err_clk_prepare;
> -
> - ret = sdhci_add_host(host);
> - if (ret)
> - goto err_sdhci_add;
> -
> - /*
> - * We must request the IRQ after sdhci_add_host(), as the tasklet only
> - * gets setup in sdhci_add_host() and we oops.
> - */
> - ret = mmc_gpiod_request_cd(host->mmc, "cd", 0, false, 0);
> - if (ret == -EPROBE_DEFER)
> - goto err_request_cd;
> - if (!ret)
> - mmc_gpiod_request_cd_irq(host->mmc);
> -
> - return 0;
> -
> -err_request_cd:
> - sdhci_remove_host(host, 0);
> -err_sdhci_add:
> - clk_disable_unprepare(pltfm_host->clk);
> -err_clk_prepare:
> - sdhci_pltfm_free(pdev);
> - return ret;
> -}
> -
> -static const struct of_device_id sdhci_sirf_of_match[] = {
> - { .compatible = "sirf,prima2-sdhc" },
> - { }
> -};
> -MODULE_DEVICE_TABLE(of, sdhci_sirf_of_match);
> -
> -static struct platform_driver sdhci_sirf_driver = {
> - .driver = {
> - .name = "sdhci-sirf",
> - .probe_type = PROBE_PREFER_ASYNCHRONOUS,
> - .of_match_table = sdhci_sirf_of_match,
> - .pm = &sdhci_pltfm_pmops,
> - },
> - .probe = sdhci_sirf_probe,
> - .remove = sdhci_pltfm_unregister,
> -};
> -
> -module_platform_driver(sdhci_sirf_driver);
> -
> -MODULE_DESCRIPTION("SDHCI driver for SiRFprimaII/SiRFmarco");
> -MODULE_AUTHOR("Barry Song <21cnbao at gmail.com>");
> -MODULE_LICENSE("GPL v2");
> --
> 2.29.2
>
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