| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Andrew Jeffery | 2401 | 89.93% | 7 | 58.33% |
| Steven Lee | 196 | 7.34% | 1 | 8.33% |
| Ivan Mikhaylov | 57 | 2.13% | 1 | 8.33% |
| Doug Anderson | 10 | 0.37% | 1 | 8.33% |
| JiSheng Zhang | 3 | 0.11% | 1 | 8.33% |
| Wei Yongjun | 3 | 0.11% | 1 | 8.33% |
| Total | 2670 | 12 |
// SPDX-License-Identifier: GPL-2.0-or-later /* Copyright (C) 2019 ASPEED Technology Inc. */ /* Copyright (C) 2019 IBM Corp. */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/io.h> #include <linux/math64.h> #include <linux/mmc/host.h> #include <linux/module.h> #include <linux/of_address.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/spinlock.h> #include "sdhci-pltfm.h" #define ASPEED_SDC_INFO 0x00 #define ASPEED_SDC_S1_MMC8 BIT(25) #define ASPEED_SDC_S0_MMC8 BIT(24) #define ASPEED_SDC_PHASE 0xf4 #define ASPEED_SDC_S1_PHASE_IN GENMASK(25, 21) #define ASPEED_SDC_S0_PHASE_IN GENMASK(20, 16) #define ASPEED_SDC_S1_PHASE_OUT GENMASK(15, 11) #define ASPEED_SDC_S1_PHASE_IN_EN BIT(10) #define ASPEED_SDC_S1_PHASE_OUT_EN GENMASK(9, 8) #define ASPEED_SDC_S0_PHASE_OUT GENMASK(7, 3) #define ASPEED_SDC_S0_PHASE_IN_EN BIT(2) #define ASPEED_SDC_S0_PHASE_OUT_EN GENMASK(1, 0) #define ASPEED_SDC_PHASE_MAX 31 /* SDIO{10,20} */ #define ASPEED_SDC_CAP1_1_8V (0 * 32 + 26) /* SDIO{14,24} */ #define ASPEED_SDC_CAP2_SDR104 (1 * 32 + 1) struct aspeed_sdc { struct clk *clk; struct resource *res; spinlock_t lock; void __iomem *regs; }; struct aspeed_sdhci_tap_param { bool valid; #define ASPEED_SDHCI_TAP_PARAM_INVERT_CLK BIT(4) u8 in; u8 out; }; struct aspeed_sdhci_tap_desc { u32 tap_mask; u32 enable_mask; u8 enable_value; }; struct aspeed_sdhci_phase_desc { struct aspeed_sdhci_tap_desc in; struct aspeed_sdhci_tap_desc out; }; struct aspeed_sdhci_pdata { unsigned int clk_div_start; const struct aspeed_sdhci_phase_desc *phase_desc; size_t nr_phase_descs; }; struct aspeed_sdhci { const struct aspeed_sdhci_pdata *pdata; struct aspeed_sdc *parent; u32 width_mask; struct mmc_clk_phase_map phase_map; const struct aspeed_sdhci_phase_desc *phase_desc; }; /* * The function sets the mirror register for updating * capbilities of the current slot. * * slot | capability | caps_reg | mirror_reg * -----|-------------|----------|------------ * 0 | CAP1_1_8V | SDIO140 | SDIO10 * 0 | CAP2_SDR104 | SDIO144 | SDIO14 * 1 | CAP1_1_8V | SDIO240 | SDIO20 * 1 | CAP2_SDR104 | SDIO244 | SDIO24 */ static void aspeed_sdc_set_slot_capability(struct sdhci_host *host, struct aspeed_sdc *sdc, int capability, bool enable, u8 slot) { u32 mirror_reg_offset; u32 cap_val; u8 cap_reg; if (slot > 1) return; cap_reg = capability / 32; cap_val = sdhci_readl(host, 0x40 + (cap_reg * 4)); if (enable) cap_val |= BIT(capability % 32); else cap_val &= ~BIT(capability % 32); mirror_reg_offset = ((slot + 1) * 0x10) + (cap_reg * 4); writel(cap_val, sdc->regs + mirror_reg_offset); } static void aspeed_sdc_configure_8bit_mode(struct aspeed_sdc *sdc, struct aspeed_sdhci *sdhci, bool bus8) { u32 info; /* Set/clear 8 bit mode */ spin_lock(&sdc->lock); info = readl(sdc->regs + ASPEED_SDC_INFO); if (bus8) info |= sdhci->width_mask; else info &= ~sdhci->width_mask; writel(info, sdc->regs + ASPEED_SDC_INFO); spin_unlock(&sdc->lock); } static u32 aspeed_sdc_set_phase_tap(const struct aspeed_sdhci_tap_desc *desc, u8 tap, bool enable, u32 reg) { reg &= ~(desc->enable_mask | desc->tap_mask); if (enable) { reg |= tap << __ffs(desc->tap_mask); reg |= desc->enable_value << __ffs(desc->enable_mask); } return reg; } static void aspeed_sdc_set_phase_taps(struct aspeed_sdc *sdc, const struct aspeed_sdhci_phase_desc *desc, const struct aspeed_sdhci_tap_param *taps) { u32 reg; spin_lock(&sdc->lock); reg = readl(sdc->regs + ASPEED_SDC_PHASE); reg = aspeed_sdc_set_phase_tap(&desc->in, taps->in, taps->valid, reg); reg = aspeed_sdc_set_phase_tap(&desc->out, taps->out, taps->valid, reg); writel(reg, sdc->regs + ASPEED_SDC_PHASE); spin_unlock(&sdc->lock); } #define PICOSECONDS_PER_SECOND 1000000000000ULL #define ASPEED_SDHCI_NR_TAPS 15 /* Measured value with *handwave* environmentals and static loading */ #define ASPEED_SDHCI_MAX_TAP_DELAY_PS 1253 static int aspeed_sdhci_phase_to_tap(struct device *dev, unsigned long rate_hz, int phase_deg) { u64 phase_period_ps; u64 prop_delay_ps; u64 clk_period_ps; unsigned int tap; u8 inverted; phase_deg %= 360; if (phase_deg >= 180) { inverted = ASPEED_SDHCI_TAP_PARAM_INVERT_CLK; phase_deg -= 180; dev_dbg(dev, "Inverting clock to reduce phase correction from %d to %d degrees\n", phase_deg + 180, phase_deg); } else { inverted = 0; } prop_delay_ps = ASPEED_SDHCI_MAX_TAP_DELAY_PS / ASPEED_SDHCI_NR_TAPS; clk_period_ps = div_u64(PICOSECONDS_PER_SECOND, (u64)rate_hz); phase_period_ps = div_u64((u64)phase_deg * clk_period_ps, 360ULL); tap = div_u64(phase_period_ps, prop_delay_ps); if (tap > ASPEED_SDHCI_NR_TAPS) { dev_dbg(dev, "Requested out of range phase tap %d for %d degrees of phase compensation at %luHz, clamping to tap %d\n", tap, phase_deg, rate_hz, ASPEED_SDHCI_NR_TAPS); tap = ASPEED_SDHCI_NR_TAPS; } return inverted | tap; } static void aspeed_sdhci_phases_to_taps(struct device *dev, unsigned long rate, const struct mmc_clk_phase *phases, struct aspeed_sdhci_tap_param *taps) { taps->valid = phases->valid; if (!phases->valid) return; taps->in = aspeed_sdhci_phase_to_tap(dev, rate, phases->in_deg); taps->out = aspeed_sdhci_phase_to_tap(dev, rate, phases->out_deg); } static void aspeed_sdhci_configure_phase(struct sdhci_host *host, unsigned long rate) { struct aspeed_sdhci_tap_param _taps = {0}, *taps = &_taps; struct mmc_clk_phase *params; struct aspeed_sdhci *sdhci; struct device *dev; dev = mmc_dev(host->mmc); sdhci = sdhci_pltfm_priv(sdhci_priv(host)); if (!sdhci->phase_desc) return; params = &sdhci->phase_map.phase[host->timing]; aspeed_sdhci_phases_to_taps(dev, rate, params, taps); aspeed_sdc_set_phase_taps(sdhci->parent, sdhci->phase_desc, taps); dev_dbg(dev, "Using taps [%d, %d] for [%d, %d] degrees of phase correction at %luHz (%d)\n", taps->in & ASPEED_SDHCI_NR_TAPS, taps->out & ASPEED_SDHCI_NR_TAPS, params->in_deg, params->out_deg, rate, host->timing); } static void aspeed_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_pltfm_host *pltfm_host; unsigned long parent, bus; struct aspeed_sdhci *sdhci; int div; u16 clk; pltfm_host = sdhci_priv(host); sdhci = sdhci_pltfm_priv(pltfm_host); parent = clk_get_rate(pltfm_host->clk); sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); if (clock == 0) return; if (WARN_ON(clock > host->max_clk)) clock = host->max_clk; /* * Regarding the AST2600: * * If (EMMC12C[7:6], EMMC12C[15:8] == 0) then * period of SDCLK = period of SDMCLK. * * If (EMMC12C[7:6], EMMC12C[15:8] != 0) then * period of SDCLK = period of SDMCLK * 2 * (EMMC12C[7:6], EMMC[15:8]) * * If you keep EMMC12C[7:6] = 0 and EMMC12C[15:8] as one-hot, * 0x1/0x2/0x4/etc, you will find it is compatible to AST2400 or AST2500 * * Keep the one-hot behaviour for backwards compatibility except for * supporting the value 0 in (EMMC12C[7:6], EMMC12C[15:8]), and capture * the 0-value capability in clk_div_start. */ for (div = sdhci->pdata->clk_div_start; div < 256; div *= 2) { bus = parent / div; if (bus <= clock) break; } div >>= 1; clk = div << SDHCI_DIVIDER_SHIFT; aspeed_sdhci_configure_phase(host, bus); sdhci_enable_clk(host, clk); } static unsigned int aspeed_sdhci_get_max_clock(struct sdhci_host *host) { if (host->mmc->f_max) return host->mmc->f_max; return sdhci_pltfm_clk_get_max_clock(host); } static void aspeed_sdhci_set_bus_width(struct sdhci_host *host, int width) { struct sdhci_pltfm_host *pltfm_priv; struct aspeed_sdhci *aspeed_sdhci; struct aspeed_sdc *aspeed_sdc; u8 ctrl; pltfm_priv = sdhci_priv(host); aspeed_sdhci = sdhci_pltfm_priv(pltfm_priv); aspeed_sdc = aspeed_sdhci->parent; /* Set/clear 8-bit mode */ aspeed_sdc_configure_8bit_mode(aspeed_sdc, aspeed_sdhci, width == MMC_BUS_WIDTH_8); /* Set/clear 1 or 4 bit mode */ ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); if (width == MMC_BUS_WIDTH_4) ctrl |= SDHCI_CTRL_4BITBUS; else ctrl &= ~SDHCI_CTRL_4BITBUS; sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); } static u32 aspeed_sdhci_readl(struct sdhci_host *host, int reg) { u32 val = readl(host->ioaddr + reg); if (unlikely(reg == SDHCI_PRESENT_STATE) && (host->mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)) val ^= SDHCI_CARD_PRESENT; return val; } static const struct sdhci_ops aspeed_sdhci_ops = { .read_l = aspeed_sdhci_readl, .set_clock = aspeed_sdhci_set_clock, .get_max_clock = aspeed_sdhci_get_max_clock, .set_bus_width = aspeed_sdhci_set_bus_width, .get_timeout_clock = sdhci_pltfm_clk_get_max_clock, .reset = sdhci_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; static const struct sdhci_pltfm_data aspeed_sdhci_pdata = { .ops = &aspeed_sdhci_ops, .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, }; static inline int aspeed_sdhci_calculate_slot(struct aspeed_sdhci *dev, struct resource *res) { resource_size_t delta; if (!res || resource_type(res) != IORESOURCE_MEM) return -EINVAL; if (res->start < dev->parent->res->start) return -EINVAL; delta = res->start - dev->parent->res->start; if (delta & (0x100 - 1)) return -EINVAL; return (delta / 0x100) - 1; } static int aspeed_sdhci_probe(struct platform_device *pdev) { const struct aspeed_sdhci_pdata *aspeed_pdata; struct device_node *np = pdev->dev.of_node; struct sdhci_pltfm_host *pltfm_host; struct aspeed_sdhci *dev; struct sdhci_host *host; struct resource *res; int slot; int ret; aspeed_pdata = of_device_get_match_data(&pdev->dev); if (!aspeed_pdata) { dev_err(&pdev->dev, "Missing platform configuration data\n"); return -EINVAL; } host = sdhci_pltfm_init(pdev, &aspeed_sdhci_pdata, sizeof(*dev)); if (IS_ERR(host)) return PTR_ERR(host); pltfm_host = sdhci_priv(host); dev = sdhci_pltfm_priv(pltfm_host); dev->pdata = aspeed_pdata; dev->parent = dev_get_drvdata(pdev->dev.parent); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); slot = aspeed_sdhci_calculate_slot(dev, res); if (slot < 0) return slot; else if (slot >= 2) return -EINVAL; if (slot < dev->pdata->nr_phase_descs) { dev->phase_desc = &dev->pdata->phase_desc[slot]; } else { dev_info(&pdev->dev, "Phase control not supported for slot %d\n", slot); dev->phase_desc = NULL; } dev->width_mask = !slot ? ASPEED_SDC_S0_MMC8 : ASPEED_SDC_S1_MMC8; dev_info(&pdev->dev, "Configured for slot %d\n", slot); sdhci_get_of_property(pdev); if (of_property_read_bool(np, "mmc-hs200-1_8v") || of_property_read_bool(np, "sd-uhs-sdr104")) { aspeed_sdc_set_slot_capability(host, dev->parent, ASPEED_SDC_CAP1_1_8V, true, slot); } if (of_property_read_bool(np, "sd-uhs-sdr104")) { aspeed_sdc_set_slot_capability(host, dev->parent, ASPEED_SDC_CAP2_SDR104, true, slot); } pltfm_host->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(pltfm_host->clk)) return PTR_ERR(pltfm_host->clk); ret = clk_prepare_enable(pltfm_host->clk); if (ret) { dev_err(&pdev->dev, "Unable to enable SDIO clock\n"); goto err_pltfm_free; } ret = mmc_of_parse(host->mmc); if (ret) goto err_sdhci_add; if (dev->phase_desc) mmc_of_parse_clk_phase(host->mmc, &dev->phase_map); ret = sdhci_add_host(host); if (ret) goto err_sdhci_add; return 0; err_sdhci_add: clk_disable_unprepare(pltfm_host->clk); err_pltfm_free: sdhci_pltfm_free(pdev); return ret; } static int aspeed_sdhci_remove(struct platform_device *pdev) { struct sdhci_pltfm_host *pltfm_host; struct sdhci_host *host; int dead = 0; host = platform_get_drvdata(pdev); pltfm_host = sdhci_priv(host); sdhci_remove_host(host, dead); clk_disable_unprepare(pltfm_host->clk); sdhci_pltfm_free(pdev); return 0; } static const struct aspeed_sdhci_pdata ast2400_sdhci_pdata = { .clk_div_start = 2, }; static const struct aspeed_sdhci_phase_desc ast2600_sdhci_phase[] = { /* SDHCI/Slot 0 */ [0] = { .in = { .tap_mask = ASPEED_SDC_S0_PHASE_IN, .enable_mask = ASPEED_SDC_S0_PHASE_IN_EN, .enable_value = 1, }, .out = { .tap_mask = ASPEED_SDC_S0_PHASE_OUT, .enable_mask = ASPEED_SDC_S0_PHASE_OUT_EN, .enable_value = 3, }, }, /* SDHCI/Slot 1 */ [1] = { .in = { .tap_mask = ASPEED_SDC_S1_PHASE_IN, .enable_mask = ASPEED_SDC_S1_PHASE_IN_EN, .enable_value = 1, }, .out = { .tap_mask = ASPEED_SDC_S1_PHASE_OUT, .enable_mask = ASPEED_SDC_S1_PHASE_OUT_EN, .enable_value = 3, }, }, }; static const struct aspeed_sdhci_pdata ast2600_sdhci_pdata = { .clk_div_start = 1, .phase_desc = ast2600_sdhci_phase, .nr_phase_descs = ARRAY_SIZE(ast2600_sdhci_phase), }; static const struct of_device_id aspeed_sdhci_of_match[] = { { .compatible = "aspeed,ast2400-sdhci", .data = &ast2400_sdhci_pdata, }, { .compatible = "aspeed,ast2500-sdhci", .data = &ast2400_sdhci_pdata, }, { .compatible = "aspeed,ast2600-sdhci", .data = &ast2600_sdhci_pdata, }, { } }; static struct platform_driver aspeed_sdhci_driver = { .driver = { .name = "sdhci-aspeed", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = aspeed_sdhci_of_match, }, .probe = aspeed_sdhci_probe, .remove = aspeed_sdhci_remove, }; static int aspeed_sdc_probe(struct platform_device *pdev) { struct device_node *parent, *child; struct aspeed_sdc *sdc; int ret; sdc = devm_kzalloc(&pdev->dev, sizeof(*sdc), GFP_KERNEL); if (!sdc) return -ENOMEM; spin_lock_init(&sdc->lock); sdc->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(sdc->clk)) return PTR_ERR(sdc->clk); ret = clk_prepare_enable(sdc->clk); if (ret) { dev_err(&pdev->dev, "Unable to enable SDCLK\n"); return ret; } sdc->res = platform_get_resource(pdev, IORESOURCE_MEM, 0); sdc->regs = devm_ioremap_resource(&pdev->dev, sdc->res); if (IS_ERR(sdc->regs)) { ret = PTR_ERR(sdc->regs); goto err_clk; } dev_set_drvdata(&pdev->dev, sdc); parent = pdev->dev.of_node; for_each_available_child_of_node(parent, child) { struct platform_device *cpdev; cpdev = of_platform_device_create(child, NULL, &pdev->dev); if (!cpdev) { of_node_put(child); ret = -ENODEV; goto err_clk; } } return 0; err_clk: clk_disable_unprepare(sdc->clk); return ret; } static int aspeed_sdc_remove(struct platform_device *pdev) { struct aspeed_sdc *sdc = dev_get_drvdata(&pdev->dev); clk_disable_unprepare(sdc->clk); return 0; } static const struct of_device_id aspeed_sdc_of_match[] = { { .compatible = "aspeed,ast2400-sd-controller", }, { .compatible = "aspeed,ast2500-sd-controller", }, { .compatible = "aspeed,ast2600-sd-controller", }, { } }; MODULE_DEVICE_TABLE(of, aspeed_sdc_of_match); static struct platform_driver aspeed_sdc_driver = { .driver = { .name = "sd-controller-aspeed", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .pm = &sdhci_pltfm_pmops, .of_match_table = aspeed_sdc_of_match, }, .probe = aspeed_sdc_probe, .remove = aspeed_sdc_remove, }; #if defined(CONFIG_MMC_SDHCI_OF_ASPEED_TEST) #include "sdhci-of-aspeed-test.c" #endif static int __init aspeed_sdc_init(void) { int rc; rc = platform_driver_register(&aspeed_sdhci_driver); if (rc < 0) return rc; rc = platform_driver_register(&aspeed_sdc_driver); if (rc < 0) platform_driver_unregister(&aspeed_sdhci_driver); return rc; } module_init(aspeed_sdc_init); static void __exit aspeed_sdc_exit(void) { platform_driver_unregister(&aspeed_sdc_driver); platform_driver_unregister(&aspeed_sdhci_driver); } module_exit(aspeed_sdc_exit); MODULE_DESCRIPTION("Driver for the ASPEED SD/SDIO/SDHCI Controllers"); MODULE_AUTHOR("Ryan Chen <ryan_chen@aspeedtech.com>"); MODULE_AUTHOR("Andrew Jeffery <andrew@aj.id.au>"); MODULE_LICENSE("GPL");
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