| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Al Cooper | 1558 | 80.43% | 9 | 47.37% |
| Kamal Dasu | 336 | 17.35% | 2 | 10.53% |
| Jaedon Shin | 11 | 0.57% | 1 | 5.26% |
| Stefan Wahren | 9 | 0.46% | 1 | 5.26% |
| Krzysztof Kozlowski | 9 | 0.46% | 1 | 5.26% |
| Doug Anderson | 5 | 0.26% | 1 | 5.26% |
| Brian Norris | 4 | 0.21% | 1 | 5.26% |
| Thomas Gleixner | 2 | 0.10% | 1 | 5.26% |
| Nathan Chancellor | 2 | 0.10% | 1 | 5.26% |
| Ulf Hansson | 1 | 0.05% | 1 | 5.26% |
| Total | 1937 | 19 |
// SPDX-License-Identifier: GPL-2.0-only /* * sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's * * Copyright (C) 2015 Broadcom Corporation */ #include <linux/io.h> #include <linux/mmc/host.h> #include <linux/module.h> #include <linux/of.h> #include <linux/bitops.h> #include <linux/delay.h> #include "sdhci-cqhci.h" #include "sdhci-pltfm.h" #include "cqhci.h" #define SDHCI_VENDOR 0x78 #define SDHCI_VENDOR_ENHANCED_STRB 0x1 #define SDHCI_VENDOR_GATE_SDCLK_EN 0x2 #define BRCMSTB_MATCH_FLAGS_NO_64BIT BIT(0) #define BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT BIT(1) #define BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE BIT(2) #define BRCMSTB_PRIV_FLAGS_HAS_CQE BIT(0) #define BRCMSTB_PRIV_FLAGS_GATE_CLOCK BIT(1) #define SDHCI_ARASAN_CQE_BASE_ADDR 0x200 struct sdhci_brcmstb_priv { void __iomem *cfg_regs; unsigned int flags; struct clk *base_clk; u32 base_freq_hz; }; struct brcmstb_match_priv { void (*hs400es)(struct mmc_host *mmc, struct mmc_ios *ios); struct sdhci_ops *ops; const unsigned int flags; }; static inline void enable_clock_gating(struct sdhci_host *host) { u32 reg; reg = sdhci_readl(host, SDHCI_VENDOR); reg |= SDHCI_VENDOR_GATE_SDCLK_EN; sdhci_writel(host, reg, SDHCI_VENDOR); } static void brcmstb_reset(struct sdhci_host *host, u8 mask) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host); sdhci_and_cqhci_reset(host, mask); /* Reset will clear this, so re-enable it */ if (priv->flags & BRCMSTB_PRIV_FLAGS_GATE_CLOCK) enable_clock_gating(host); } static void sdhci_brcmstb_hs400es(struct mmc_host *mmc, struct mmc_ios *ios) { struct sdhci_host *host = mmc_priv(mmc); u32 reg; dev_dbg(mmc_dev(mmc), "%s(): Setting HS400-Enhanced-Strobe mode\n", __func__); reg = readl(host->ioaddr + SDHCI_VENDOR); if (ios->enhanced_strobe) reg |= SDHCI_VENDOR_ENHANCED_STRB; else reg &= ~SDHCI_VENDOR_ENHANCED_STRB; writel(reg, host->ioaddr + SDHCI_VENDOR); } static void sdhci_brcmstb_set_clock(struct sdhci_host *host, unsigned int clock) { u16 clk; host->mmc->actual_clock = 0; clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock); sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); if (clock == 0) return; sdhci_enable_clk(host, clk); } static void sdhci_brcmstb_set_uhs_signaling(struct sdhci_host *host, unsigned int timing) { u16 ctrl_2; dev_dbg(mmc_dev(host->mmc), "%s: Setting UHS signaling for %d timing\n", __func__, timing); ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); /* Select Bus Speed Mode for host */ ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; if ((timing == MMC_TIMING_MMC_HS200) || (timing == MMC_TIMING_UHS_SDR104)) ctrl_2 |= SDHCI_CTRL_UHS_SDR104; else if (timing == MMC_TIMING_UHS_SDR12) ctrl_2 |= SDHCI_CTRL_UHS_SDR12; else if (timing == MMC_TIMING_SD_HS || timing == MMC_TIMING_MMC_HS || timing == MMC_TIMING_UHS_SDR25) ctrl_2 |= SDHCI_CTRL_UHS_SDR25; else if (timing == MMC_TIMING_UHS_SDR50) ctrl_2 |= SDHCI_CTRL_UHS_SDR50; else if ((timing == MMC_TIMING_UHS_DDR50) || (timing == MMC_TIMING_MMC_DDR52)) ctrl_2 |= SDHCI_CTRL_UHS_DDR50; else if (timing == MMC_TIMING_MMC_HS400) ctrl_2 |= SDHCI_CTRL_HS400; /* Non-standard */ sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); } static void sdhci_brcmstb_dumpregs(struct mmc_host *mmc) { sdhci_dumpregs(mmc_priv(mmc)); } static void sdhci_brcmstb_cqe_enable(struct mmc_host *mmc) { struct sdhci_host *host = mmc_priv(mmc); u32 reg; reg = sdhci_readl(host, SDHCI_PRESENT_STATE); while (reg & SDHCI_DATA_AVAILABLE) { sdhci_readl(host, SDHCI_BUFFER); reg = sdhci_readl(host, SDHCI_PRESENT_STATE); } sdhci_cqe_enable(mmc); } static const struct cqhci_host_ops sdhci_brcmstb_cqhci_ops = { .enable = sdhci_brcmstb_cqe_enable, .disable = sdhci_cqe_disable, .dumpregs = sdhci_brcmstb_dumpregs, }; static struct sdhci_ops sdhci_brcmstb_ops = { .set_clock = sdhci_set_clock, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; static struct sdhci_ops sdhci_brcmstb_ops_7216 = { .set_clock = sdhci_brcmstb_set_clock, .set_bus_width = sdhci_set_bus_width, .reset = brcmstb_reset, .set_uhs_signaling = sdhci_brcmstb_set_uhs_signaling, }; static struct brcmstb_match_priv match_priv_7425 = { .flags = BRCMSTB_MATCH_FLAGS_NO_64BIT | BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT, .ops = &sdhci_brcmstb_ops, }; static struct brcmstb_match_priv match_priv_7445 = { .flags = BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT, .ops = &sdhci_brcmstb_ops, }; static const struct brcmstb_match_priv match_priv_7216 = { .flags = BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE, .hs400es = sdhci_brcmstb_hs400es, .ops = &sdhci_brcmstb_ops_7216, }; static const struct of_device_id sdhci_brcm_of_match[] = { { .compatible = "brcm,bcm7425-sdhci", .data = &match_priv_7425 }, { .compatible = "brcm,bcm7445-sdhci", .data = &match_priv_7445 }, { .compatible = "brcm,bcm7216-sdhci", .data = &match_priv_7216 }, {}, }; static u32 sdhci_brcmstb_cqhci_irq(struct sdhci_host *host, u32 intmask) { int cmd_error = 0; int data_error = 0; if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error)) return intmask; cqhci_irq(host->mmc, intmask, cmd_error, data_error); return 0; } static int sdhci_brcmstb_add_host(struct sdhci_host *host, struct sdhci_brcmstb_priv *priv) { struct cqhci_host *cq_host; bool dma64; int ret; if ((priv->flags & BRCMSTB_PRIV_FLAGS_HAS_CQE) == 0) return sdhci_add_host(host); dev_dbg(mmc_dev(host->mmc), "CQE is enabled\n"); host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; ret = sdhci_setup_host(host); if (ret) return ret; cq_host = devm_kzalloc(mmc_dev(host->mmc), sizeof(*cq_host), GFP_KERNEL); if (!cq_host) { ret = -ENOMEM; goto cleanup; } cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR; cq_host->ops = &sdhci_brcmstb_cqhci_ops; dma64 = host->flags & SDHCI_USE_64_BIT_DMA; if (dma64) { dev_dbg(mmc_dev(host->mmc), "Using 64 bit DMA\n"); cq_host->caps |= CQHCI_TASK_DESC_SZ_128; } ret = cqhci_init(cq_host, host->mmc, dma64); if (ret) goto cleanup; ret = __sdhci_add_host(host); if (ret) goto cleanup; return 0; cleanup: sdhci_cleanup_host(host); return ret; } static int sdhci_brcmstb_probe(struct platform_device *pdev) { const struct brcmstb_match_priv *match_priv; struct sdhci_pltfm_data brcmstb_pdata; struct sdhci_pltfm_host *pltfm_host; const struct of_device_id *match; struct sdhci_brcmstb_priv *priv; u32 actual_clock_mhz; struct sdhci_host *host; struct resource *iomem; struct clk *clk; struct clk *base_clk = NULL; int res; match = of_match_node(sdhci_brcm_of_match, pdev->dev.of_node); match_priv = match->data; dev_dbg(&pdev->dev, "Probe found match for %s\n", match->compatible); clk = devm_clk_get_optional(&pdev->dev, NULL); if (IS_ERR(clk)) return dev_err_probe(&pdev->dev, PTR_ERR(clk), "Failed to get clock from Device Tree\n"); res = clk_prepare_enable(clk); if (res) return res; memset(&brcmstb_pdata, 0, sizeof(brcmstb_pdata)); brcmstb_pdata.ops = match_priv->ops; host = sdhci_pltfm_init(pdev, &brcmstb_pdata, sizeof(struct sdhci_brcmstb_priv)); if (IS_ERR(host)) { res = PTR_ERR(host); goto err_clk; } pltfm_host = sdhci_priv(host); priv = sdhci_pltfm_priv(pltfm_host); if (device_property_read_bool(&pdev->dev, "supports-cqe")) { priv->flags |= BRCMSTB_PRIV_FLAGS_HAS_CQE; match_priv->ops->irq = sdhci_brcmstb_cqhci_irq; } /* Map in the non-standard CFG registers */ iomem = platform_get_resource(pdev, IORESOURCE_MEM, 1); priv->cfg_regs = devm_ioremap_resource(&pdev->dev, iomem); if (IS_ERR(priv->cfg_regs)) { res = PTR_ERR(priv->cfg_regs); goto err; } sdhci_get_of_property(pdev); res = mmc_of_parse(host->mmc); if (res) goto err; /* * Automatic clock gating does not work for SD cards that may * voltage switch so only enable it for non-removable devices. */ if ((match_priv->flags & BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE) && (host->mmc->caps & MMC_CAP_NONREMOVABLE)) priv->flags |= BRCMSTB_PRIV_FLAGS_GATE_CLOCK; /* * If the chip has enhanced strobe and it's enabled, add * callback */ if (match_priv->hs400es && (host->mmc->caps2 & MMC_CAP2_HS400_ES)) host->mmc_host_ops.hs400_enhanced_strobe = match_priv->hs400es; /* * Supply the existing CAPS, but clear the UHS modes. This * will allow these modes to be specified by device tree * properties through mmc_of_parse(). */ host->caps = sdhci_readl(host, SDHCI_CAPABILITIES); if (match_priv->flags & BRCMSTB_MATCH_FLAGS_NO_64BIT) host->caps &= ~SDHCI_CAN_64BIT; host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1); host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_DDR50); host->quirks |= SDHCI_QUIRK_MISSING_CAPS; if (match_priv->flags & BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT) host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; /* Change the base clock frequency if the DT property exists */ if (device_property_read_u32(&pdev->dev, "clock-frequency", &priv->base_freq_hz) != 0) goto add_host; base_clk = devm_clk_get_optional(&pdev->dev, "sdio_freq"); if (IS_ERR(base_clk)) { dev_warn(&pdev->dev, "Clock for \"sdio_freq\" not found\n"); goto add_host; } res = clk_prepare_enable(base_clk); if (res) goto err; /* set improved clock rate */ clk_set_rate(base_clk, priv->base_freq_hz); actual_clock_mhz = clk_get_rate(base_clk) / 1000000; host->caps &= ~SDHCI_CLOCK_V3_BASE_MASK; host->caps |= (actual_clock_mhz << SDHCI_CLOCK_BASE_SHIFT); /* Disable presets because they are now incorrect */ host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; dev_dbg(&pdev->dev, "Base Clock Frequency changed to %dMHz\n", actual_clock_mhz); priv->base_clk = base_clk; add_host: res = sdhci_brcmstb_add_host(host, priv); if (res) goto err; pltfm_host->clk = clk; return res; err: sdhci_pltfm_free(pdev); err_clk: clk_disable_unprepare(base_clk); clk_disable_unprepare(clk); return res; } static void sdhci_brcmstb_shutdown(struct platform_device *pdev) { sdhci_pltfm_suspend(&pdev->dev); } MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match); #ifdef CONFIG_PM_SLEEP static int sdhci_brcmstb_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host); clk_disable_unprepare(priv->base_clk); return sdhci_pltfm_suspend(dev); } static int sdhci_brcmstb_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host); int ret; ret = sdhci_pltfm_resume(dev); if (!ret && priv->base_freq_hz) { ret = clk_prepare_enable(priv->base_clk); /* * Note: using clk_get_rate() below as clk_get_rate() * honors CLK_GET_RATE_NOCACHE attribute, but clk_set_rate() * may do implicit get_rate() calls that do not honor * CLK_GET_RATE_NOCACHE. */ if (!ret && (clk_get_rate(priv->base_clk) != priv->base_freq_hz)) ret = clk_set_rate(priv->base_clk, priv->base_freq_hz); } return ret; } #endif static const struct dev_pm_ops sdhci_brcmstb_pmops = { SET_SYSTEM_SLEEP_PM_OPS(sdhci_brcmstb_suspend, sdhci_brcmstb_resume) }; static struct platform_driver sdhci_brcmstb_driver = { .driver = { .name = "sdhci-brcmstb", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .pm = &sdhci_brcmstb_pmops, .of_match_table = of_match_ptr(sdhci_brcm_of_match), }, .probe = sdhci_brcmstb_probe, .remove = sdhci_pltfm_unregister, .shutdown = sdhci_brcmstb_shutdown, }; module_platform_driver(sdhci_brcmstb_driver); MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs"); MODULE_AUTHOR("Broadcom"); MODULE_LICENSE("GPL v2");
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