| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Zhangfei Gao | 780 | 48.03% | 2 | 7.14% |
| Doug Brown | 573 | 35.28% | 6 | 21.43% |
| Chris Ball | 192 | 11.82% | 1 | 3.57% |
| Russell King | 38 | 2.34% | 4 | 14.29% |
| Tanmay Upadhyay | 6 | 0.37% | 1 | 3.57% |
| Adrian Hunter | 6 | 0.37% | 1 | 3.57% |
| Doug Anderson | 5 | 0.31% | 1 | 3.57% |
| Axel Lin | 5 | 0.31% | 2 | 7.14% |
| Manuel Lauss | 4 | 0.25% | 1 | 3.57% |
| Lars-Peter Clausen | 3 | 0.18% | 2 | 7.14% |
| Paul Gortmaker | 3 | 0.18% | 1 | 3.57% |
| Thomas Gleixner | 2 | 0.12% | 1 | 3.57% |
| Ulf Hansson | 2 | 0.12% | 1 | 3.57% |
| Masahiro Yamada | 2 | 0.12% | 1 | 3.57% |
| Rob Herring | 1 | 0.06% | 1 | 3.57% |
| Yangtao Li | 1 | 0.06% | 1 | 3.57% |
| Christian Daudt | 1 | 0.06% | 1 | 3.57% |
| Total | 1624 | 28 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2010 Marvell International Ltd. * Zhangfei Gao <zhangfei.gao@marvell.com> * Kevin Wang <dwang4@marvell.com> * Jun Nie <njun@marvell.com> * Qiming Wu <wuqm@marvell.com> * Philip Rakity <prakity@marvell.com> */ #include <linux/err.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/module.h> #include <linux/io.h> #include <linux/mmc/card.h> #include <linux/mmc/host.h> #include <linux/platform_data/pxa_sdhci.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/mmc/sdio.h> #include <linux/mmc/mmc.h> #include <linux/pinctrl/consumer.h> #include "sdhci.h" #include "sdhci-pltfm.h" #define SD_FIFO_PARAM 0xe0 #define DIS_PAD_SD_CLK_GATE 0x0400 /* Turn on/off Dynamic SD Clock Gating */ #define CLK_GATE_ON 0x0200 /* Disable/enable Clock Gate */ #define CLK_GATE_CTL 0x0100 /* Clock Gate Control */ #define CLK_GATE_SETTING_BITS (DIS_PAD_SD_CLK_GATE | \ CLK_GATE_ON | CLK_GATE_CTL) #define SD_CLOCK_BURST_SIZE_SETUP 0xe6 #define SDCLK_SEL_SHIFT 8 #define SDCLK_SEL_MASK 0x3 #define SDCLK_DELAY_SHIFT 10 #define SDCLK_DELAY_MASK 0x3c #define SD_CE_ATA_2 0xea #define MMC_CARD 0x1000 #define MMC_WIDTH 0x0100 struct sdhci_pxav2_host { struct mmc_request *sdio_mrq; struct pinctrl *pinctrl; struct pinctrl_state *pins_default; struct pinctrl_state *pins_cmd_gpio; }; static void pxav2_reset(struct sdhci_host *host, u8 mask) { struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc)); struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data; sdhci_reset(host, mask); if (mask == SDHCI_RESET_ALL) { u16 tmp = 0; /* * tune timing of read data/command when crc error happen * no performance impact */ if (pdata && pdata->clk_delay_sel == 1) { tmp = readw(host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP); tmp &= ~(SDCLK_DELAY_MASK << SDCLK_DELAY_SHIFT); tmp |= (pdata->clk_delay_cycles & SDCLK_DELAY_MASK) << SDCLK_DELAY_SHIFT; tmp &= ~(SDCLK_SEL_MASK << SDCLK_SEL_SHIFT); tmp |= (1 & SDCLK_SEL_MASK) << SDCLK_SEL_SHIFT; writew(tmp, host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP); } if (pdata && (pdata->flags & PXA_FLAG_ENABLE_CLOCK_GATING)) { tmp = readw(host->ioaddr + SD_FIFO_PARAM); tmp &= ~CLK_GATE_SETTING_BITS; writew(tmp, host->ioaddr + SD_FIFO_PARAM); } else { tmp = readw(host->ioaddr + SD_FIFO_PARAM); tmp &= ~CLK_GATE_SETTING_BITS; tmp |= CLK_GATE_SETTING_BITS; writew(tmp, host->ioaddr + SD_FIFO_PARAM); } } } static u16 pxav1_readw(struct sdhci_host *host, int reg) { /* Workaround for data abort exception on SDH2 and SDH4 on PXA168 */ if (reg == SDHCI_HOST_VERSION) return readl(host->ioaddr + SDHCI_HOST_VERSION - 2) >> 16; return readw(host->ioaddr + reg); } static u32 pxav1_irq(struct sdhci_host *host, u32 intmask) { struct sdhci_pxav2_host *pxav2_host = sdhci_pltfm_priv(sdhci_priv(host)); struct mmc_request *sdio_mrq; if (pxav2_host->sdio_mrq && (intmask & SDHCI_INT_CMD_MASK)) { /* The dummy CMD0 for the SDIO workaround just completed */ sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK, SDHCI_INT_STATUS); intmask &= ~SDHCI_INT_CMD_MASK; /* Restore MMC function to CMD pin */ if (pxav2_host->pinctrl && pxav2_host->pins_default) pinctrl_select_state(pxav2_host->pinctrl, pxav2_host->pins_default); sdio_mrq = pxav2_host->sdio_mrq; pxav2_host->sdio_mrq = NULL; mmc_request_done(host->mmc, sdio_mrq); } return intmask; } static void pxav1_request_done(struct sdhci_host *host, struct mmc_request *mrq) { u16 tmp; struct sdhci_pxav2_host *pxav2_host; /* If this is an SDIO command, perform errata workaround for silicon bug */ if (mrq->cmd && !mrq->cmd->error && (mrq->cmd->opcode == SD_IO_RW_DIRECT || mrq->cmd->opcode == SD_IO_RW_EXTENDED)) { /* Reset data port */ tmp = readw(host->ioaddr + SDHCI_TIMEOUT_CONTROL); tmp |= 0x400; writew(tmp, host->ioaddr + SDHCI_TIMEOUT_CONTROL); /* Clock is now stopped, so restart it by sending a dummy CMD0 */ pxav2_host = sdhci_pltfm_priv(sdhci_priv(host)); pxav2_host->sdio_mrq = mrq; /* Set CMD as high output rather than MMC function while we do CMD0 */ if (pxav2_host->pinctrl && pxav2_host->pins_cmd_gpio) pinctrl_select_state(pxav2_host->pinctrl, pxav2_host->pins_cmd_gpio); sdhci_writel(host, 0, SDHCI_ARGUMENT); sdhci_writew(host, 0, SDHCI_TRANSFER_MODE); sdhci_writew(host, SDHCI_MAKE_CMD(MMC_GO_IDLE_STATE, SDHCI_CMD_RESP_NONE), SDHCI_COMMAND); /* Don't finish this request until the dummy CMD0 finishes */ return; } mmc_request_done(host->mmc, mrq); } static void pxav2_mmc_set_bus_width(struct sdhci_host *host, int width) { u8 ctrl; u16 tmp; ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL); tmp = readw(host->ioaddr + SD_CE_ATA_2); if (width == MMC_BUS_WIDTH_8) { ctrl &= ~SDHCI_CTRL_4BITBUS; tmp |= MMC_CARD | MMC_WIDTH; } else { tmp &= ~(MMC_CARD | MMC_WIDTH); if (width == MMC_BUS_WIDTH_4) ctrl |= SDHCI_CTRL_4BITBUS; else ctrl &= ~SDHCI_CTRL_4BITBUS; } writew(tmp, host->ioaddr + SD_CE_ATA_2); writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL); } struct sdhci_pxa_variant { const struct sdhci_ops *ops; unsigned int extra_quirks; }; static const struct sdhci_ops pxav1_sdhci_ops = { .read_w = pxav1_readw, .set_clock = sdhci_set_clock, .irq = pxav1_irq, .get_max_clock = sdhci_pltfm_clk_get_max_clock, .set_bus_width = pxav2_mmc_set_bus_width, .reset = pxav2_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, .request_done = pxav1_request_done, }; static const struct sdhci_pxa_variant __maybe_unused pxav1_variant = { .ops = &pxav1_sdhci_ops, .extra_quirks = SDHCI_QUIRK_NO_BUSY_IRQ | SDHCI_QUIRK_32BIT_DMA_SIZE, }; static const struct sdhci_ops pxav2_sdhci_ops = { .set_clock = sdhci_set_clock, .get_max_clock = sdhci_pltfm_clk_get_max_clock, .set_bus_width = pxav2_mmc_set_bus_width, .reset = pxav2_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; static const struct sdhci_pxa_variant pxav2_variant = { .ops = &pxav2_sdhci_ops, }; #ifdef CONFIG_OF static const struct of_device_id sdhci_pxav2_of_match[] = { { .compatible = "mrvl,pxav1-mmc", .data = &pxav1_variant, }, { .compatible = "mrvl,pxav2-mmc", .data = &pxav2_variant, }, {}, }; MODULE_DEVICE_TABLE(of, sdhci_pxav2_of_match); static struct sdhci_pxa_platdata *pxav2_get_mmc_pdata(struct device *dev) { struct sdhci_pxa_platdata *pdata; struct device_node *np = dev->of_node; u32 bus_width; u32 clk_delay_cycles; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return NULL; if (of_property_read_bool(np, "non-removable")) pdata->flags |= PXA_FLAG_CARD_PERMANENT; of_property_read_u32(np, "bus-width", &bus_width); if (bus_width == 8) pdata->flags |= PXA_FLAG_SD_8_BIT_CAPABLE_SLOT; of_property_read_u32(np, "mrvl,clk-delay-cycles", &clk_delay_cycles); if (clk_delay_cycles > 0) { pdata->clk_delay_sel = 1; pdata->clk_delay_cycles = clk_delay_cycles; } return pdata; } #else static inline struct sdhci_pxa_platdata *pxav2_get_mmc_pdata(struct device *dev) { return NULL; } #endif static int sdhci_pxav2_probe(struct platform_device *pdev) { struct sdhci_pltfm_host *pltfm_host; struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data; struct sdhci_pxav2_host *pxav2_host; struct device *dev = &pdev->dev; struct sdhci_host *host = NULL; const struct sdhci_pxa_variant *variant; int ret; struct clk *clk, *clk_core; host = sdhci_pltfm_init(pdev, NULL, sizeof(*pxav2_host)); if (IS_ERR(host)) return PTR_ERR(host); pltfm_host = sdhci_priv(host); pxav2_host = sdhci_pltfm_priv(pltfm_host); clk = devm_clk_get_optional_enabled(dev, "io"); if (!clk) clk = devm_clk_get_enabled(dev, NULL); if (IS_ERR(clk)) { ret = PTR_ERR(clk); dev_err_probe(dev, ret, "failed to get io clock\n"); goto free; } pltfm_host->clk = clk; clk_core = devm_clk_get_optional_enabled(dev, "core"); if (IS_ERR(clk_core)) { ret = PTR_ERR(clk_core); dev_err_probe(dev, ret, "failed to enable core clock\n"); goto free; } host->quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN; variant = of_device_get_match_data(dev); if (variant) pdata = pxav2_get_mmc_pdata(dev); else variant = &pxav2_variant; if (pdata) { if (pdata->flags & PXA_FLAG_CARD_PERMANENT) { /* on-chip device */ host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; host->mmc->caps |= MMC_CAP_NONREMOVABLE; } /* If slot design supports 8 bit data, indicate this to MMC. */ if (pdata->flags & PXA_FLAG_SD_8_BIT_CAPABLE_SLOT) host->mmc->caps |= MMC_CAP_8_BIT_DATA; if (pdata->quirks) host->quirks |= pdata->quirks; if (pdata->host_caps) host->mmc->caps |= pdata->host_caps; if (pdata->pm_caps) host->mmc->pm_caps |= pdata->pm_caps; } host->quirks |= variant->extra_quirks; host->ops = variant->ops; /* Set up optional pinctrl for PXA168 SDIO IRQ fix */ pxav2_host->pinctrl = devm_pinctrl_get(dev); if (!IS_ERR(pxav2_host->pinctrl)) { pxav2_host->pins_cmd_gpio = pinctrl_lookup_state(pxav2_host->pinctrl, "state_cmd_gpio"); if (IS_ERR(pxav2_host->pins_cmd_gpio)) pxav2_host->pins_cmd_gpio = NULL; pxav2_host->pins_default = pinctrl_lookup_state(pxav2_host->pinctrl, "default"); if (IS_ERR(pxav2_host->pins_default)) pxav2_host->pins_default = NULL; } else { pxav2_host->pinctrl = NULL; } ret = sdhci_add_host(host); if (ret) goto free; return 0; free: sdhci_pltfm_free(pdev); return ret; } static struct platform_driver sdhci_pxav2_driver = { .driver = { .name = "sdhci-pxav2", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = of_match_ptr(sdhci_pxav2_of_match), .pm = &sdhci_pltfm_pmops, }, .probe = sdhci_pxav2_probe, .remove_new = sdhci_pltfm_remove, }; module_platform_driver(sdhci_pxav2_driver); MODULE_DESCRIPTION("SDHCI driver for pxav2"); MODULE_AUTHOR("Marvell International Ltd."); MODULE_LICENSE("GPL v2");