From ac804143cfd128d144403ef2434344988c3fde9f Mon Sep 17 00:00:00 2001 From: Yifeng Zhao Date: Tue, 29 Jun 2021 16:24:41 +0800 Subject: [PATCH] mmc: rockchip_sdhci: add phy and clock config for rk3399 Add clock, phy and other configuration, it is convenient to support new controller. Here a short summary of the changes: - Add mmc_of_parse to parse dts config. - Remove OF_PLATDATA related code. - Reorder header inclusion. - Add phy ops. - add ops set_ios_post to modify the parameters of phy when the clock changes. - Add execute tuning api for hs200 tuning. Signed-off-by: Yifeng Zhao Reviewed-by: Jaehoon Chung Reviewed-by: Kever Yang --- drivers/mmc/rockchip_sdhci.c | 313 +++++++++++++++++++++++++++++++---- 1 file changed, 277 insertions(+), 36 deletions(-) diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c index d95f8b2a15..eff134c8f5 100644 --- a/drivers/mmc/rockchip_sdhci.c +++ b/drivers/mmc/rockchip_sdhci.c @@ -6,90 +6,322 @@ */ #include +#include #include +#include #include +#include #include #include +#include #include #include +#include "mmc_private.h" #include -#include +#include +#include +#include /* 400KHz is max freq for card ID etc. Use that as min */ #define EMMC_MIN_FREQ 400000 +#define KHz (1000) +#define MHz (1000 * KHz) +#define SDHCI_TUNING_LOOP_COUNT 40 + +#define PHYCTRL_CALDONE_MASK 0x1 +#define PHYCTRL_CALDONE_SHIFT 0x6 +#define PHYCTRL_CALDONE_DONE 0x1 +#define PHYCTRL_DLLRDY_MASK 0x1 +#define PHYCTRL_DLLRDY_SHIFT 0x5 +#define PHYCTRL_DLLRDY_DONE 0x1 +#define PHYCTRL_FREQSEL_200M 0x0 +#define PHYCTRL_FREQSEL_50M 0x1 +#define PHYCTRL_FREQSEL_100M 0x2 +#define PHYCTRL_FREQSEL_150M 0x3 +#define PHYCTRL_DLL_LOCK_WO_TMOUT(x) \ + ((((x) >> PHYCTRL_DLLRDY_SHIFT) & PHYCTRL_DLLRDY_MASK) ==\ + PHYCTRL_DLLRDY_DONE) struct rockchip_sdhc_plat { -#if CONFIG_IS_ENABLED(OF_PLATDATA) - struct dtd_rockchip_rk3399_sdhci_5_1 dtplat; -#endif struct mmc_config cfg; struct mmc mmc; }; +struct rockchip_emmc_phy { + u32 emmcphy_con[7]; + u32 reserved; + u32 emmcphy_status; +}; + struct rockchip_sdhc { struct sdhci_host host; + struct udevice *dev; void *base; + struct rockchip_emmc_phy *phy; + struct clk emmc_clk; +}; + +struct sdhci_data { + int (*emmc_set_clock)(struct sdhci_host *host, unsigned int clock); + int (*emmc_phy_init)(struct udevice *dev); + int (*get_phy)(struct udevice *dev); +}; + +static int rk3399_emmc_phy_init(struct udevice *dev) +{ + return 0; +} + +static void rk3399_emmc_phy_power_on(struct rockchip_emmc_phy *phy, u32 clock) +{ + u32 caldone, dllrdy, freqsel; + + writel(RK_CLRSETBITS(7 << 4, 0), &phy->emmcphy_con[6]); + writel(RK_CLRSETBITS(1 << 11, 1 << 11), &phy->emmcphy_con[0]); + writel(RK_CLRSETBITS(0xf << 7, 6 << 7), &phy->emmcphy_con[0]); + + /* + * According to the user manual, calpad calibration + * cycle takes more than 2us without the minimal recommended + * value, so we may need a little margin here + */ + udelay(3); + writel(RK_CLRSETBITS(1, 1), &phy->emmcphy_con[6]); + + /* + * According to the user manual, it asks driver to + * wait 5us for calpad busy trimming. But it seems that + * 5us of caldone isn't enough for all cases. + */ + udelay(500); + caldone = readl(&phy->emmcphy_status); + caldone = (caldone >> PHYCTRL_CALDONE_SHIFT) & PHYCTRL_CALDONE_MASK; + if (caldone != PHYCTRL_CALDONE_DONE) { + printf("%s: caldone timeout.\n", __func__); + return; + } + + /* Set the frequency of the DLL operation */ + if (clock < 75 * MHz) + freqsel = PHYCTRL_FREQSEL_50M; + else if (clock < 125 * MHz) + freqsel = PHYCTRL_FREQSEL_100M; + else if (clock < 175 * MHz) + freqsel = PHYCTRL_FREQSEL_150M; + else + freqsel = PHYCTRL_FREQSEL_200M; + + /* Set the frequency of the DLL operation */ + writel(RK_CLRSETBITS(3 << 12, freqsel << 12), &phy->emmcphy_con[0]); + writel(RK_CLRSETBITS(1 << 1, 1 << 1), &phy->emmcphy_con[6]); + + read_poll_timeout(readl, &phy->emmcphy_status, dllrdy, + PHYCTRL_DLL_LOCK_WO_TMOUT(dllrdy), 1, 5000); +} + +static void rk3399_emmc_phy_power_off(struct rockchip_emmc_phy *phy) +{ + writel(RK_CLRSETBITS(1, 0), &phy->emmcphy_con[6]); + writel(RK_CLRSETBITS(1 << 1, 0), &phy->emmcphy_con[6]); +} + +static int rk3399_emmc_get_phy(struct udevice *dev) +{ + struct rockchip_sdhc *priv = dev_get_priv(dev); + ofnode phy_node; + void *grf_base; + u32 grf_phy_offset, phandle; + + phandle = dev_read_u32_default(dev, "phys", 0); + phy_node = ofnode_get_by_phandle(phandle); + if (!ofnode_valid(phy_node)) { + debug("Not found emmc phy device\n"); + return -ENODEV; + } + + grf_base = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + if (grf_base < 0) { + printf("%s Get syscon grf failed", __func__); + return -ENODEV; + } + grf_phy_offset = ofnode_read_u32_default(phy_node, "reg", 0); + + priv->phy = (struct rockchip_emmc_phy *)(grf_base + grf_phy_offset); + + return 0; +} + +static int rk3399_sdhci_emmc_set_clock(struct sdhci_host *host, unsigned int clock) +{ + struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host); + int cycle_phy = host->clock != clock && clock > EMMC_MIN_FREQ; + + if (cycle_phy) + rk3399_emmc_phy_power_off(priv->phy); + + sdhci_set_clock(host->mmc, clock); + + if (cycle_phy) + rk3399_emmc_phy_power_on(priv->phy, clock); + + return 0; +} + +static int rockchip_sdhci_set_ios_post(struct sdhci_host *host) +{ + struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host); + struct sdhci_data *data = (struct sdhci_data *)dev_get_driver_data(priv->dev); + struct mmc *mmc = host->mmc; + uint clock = mmc->tran_speed; + u32 reg; + + if (!clock) + clock = mmc->clock; + + if (data->emmc_set_clock) + data->emmc_set_clock(host, clock); + + if (mmc->selected_mode == MMC_HS_400 || mmc->selected_mode == MMC_HS_400_ES) { + reg = sdhci_readw(host, SDHCI_HOST_CONTROL2); + reg &= ~SDHCI_CTRL_UHS_MASK; + reg |= SDHCI_CTRL_HS400; + sdhci_writew(host, reg, SDHCI_HOST_CONTROL2); + } else { + sdhci_set_uhs_timing(host); + } + + return 0; +} + +static int rockchip_sdhci_execute_tuning(struct mmc *mmc, u8 opcode) +{ + struct sdhci_host *host = dev_get_priv(mmc->dev); + char tuning_loop_counter = SDHCI_TUNING_LOOP_COUNT; + struct mmc_cmd cmd; + u32 ctrl, blk_size; + int ret = 0; + + ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); + ctrl |= SDHCI_CTRL_EXEC_TUNING; + sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); + + sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE); + sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE); + + blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 64); + if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200 && host->mmc->bus_width == 8) + blk_size = SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, 128); + sdhci_writew(host, blk_size, SDHCI_BLOCK_SIZE); + sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); + + cmd.cmdidx = opcode; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + + do { + if (tuning_loop_counter-- == 0) + break; + + mmc_send_cmd(mmc, &cmd, NULL); + + if (opcode == MMC_CMD_SEND_TUNING_BLOCK) + /* + * For tuning command, do not do busy loop. As tuning + * is happening (CLK-DATA latching for setup/hold time + * requirements), give time to complete + */ + udelay(1); + + ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); + } while (ctrl & SDHCI_CTRL_EXEC_TUNING); + + if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { + printf("%s:Tuning failed\n", __func__); + ret = -EIO; + } + + if (tuning_loop_counter < 0) { + ctrl &= ~SDHCI_CTRL_TUNED_CLK; + sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL2); + } + + /* Enable only interrupts served by the SD controller */ + sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK, SDHCI_INT_ENABLE); + /* Mask all sdhci interrupt sources */ + sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE); + + return ret; +} + +static struct sdhci_ops rockchip_sdhci_ops = { + .set_ios_post = rockchip_sdhci_set_ios_post, + .platform_execute_tuning = &rockchip_sdhci_execute_tuning, }; -static int arasan_sdhci_probe(struct udevice *dev) +static int rockchip_sdhci_probe(struct udevice *dev) { + struct sdhci_data *data = (struct sdhci_data *)dev_get_driver_data(dev); struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); struct rockchip_sdhc_plat *plat = dev_get_plat(dev); struct rockchip_sdhc *prv = dev_get_priv(dev); + struct mmc_config *cfg = &plat->cfg; struct sdhci_host *host = &prv->host; - int max_frequency, ret; struct clk clk; + int ret; -#if CONFIG_IS_ENABLED(OF_PLATDATA) - struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat; - - host->name = dev->name; - host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]); - max_frequency = dtplat->max_frequency; - ret = clk_get_by_driver_info(dev, dtplat->clocks, &clk); -#else - max_frequency = dev_read_u32_default(dev, "max-frequency", 0); + host->max_clk = cfg->f_max; ret = clk_get_by_index(dev, 0, &clk); -#endif if (!ret) { - ret = clk_set_rate(&clk, max_frequency); + ret = clk_set_rate(&clk, host->max_clk); if (IS_ERR_VALUE(ret)) printf("%s clk set rate fail!\n", __func__); } else { printf("%s fail to get clk\n", __func__); } + prv->emmc_clk = clk; + prv->dev = dev; + + if (data->get_phy) { + ret = data->get_phy(dev); + if (ret) + return ret; + } + + if (data->emmc_phy_init) { + ret = data->emmc_phy_init(dev); + if (ret) + return ret; + } + + host->ops = &rockchip_sdhci_ops; host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; - host->max_clk = max_frequency; - /* - * The sdhci-driver only supports 4bit and 8bit, as sdhci_setup_cfg - * doesn't allow us to clear MMC_MODE_4BIT. Consequently, we don't - * check for other bus-width values. - */ - if (host->bus_width == 8) - host->host_caps |= MMC_MODE_8BIT; host->mmc = &plat->mmc; host->mmc->priv = &prv->host; host->mmc->dev = dev; upriv->mmc = host->mmc; - ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ); + ret = sdhci_setup_cfg(cfg, host, cfg->f_max, EMMC_MIN_FREQ); if (ret) return ret; return sdhci_probe(dev); } -static int arasan_sdhci_of_to_plat(struct udevice *dev) +static int rockchip_sdhci_of_to_plat(struct udevice *dev) { -#if !CONFIG_IS_ENABLED(OF_PLATDATA) + struct rockchip_sdhc_plat *plat = dev_get_plat(dev); struct sdhci_host *host = dev_get_priv(dev); + struct mmc_config *cfg = &plat->cfg; + int ret; host->name = dev->name; host->ioaddr = dev_read_addr_ptr(dev); - host->bus_width = dev_read_u32_default(dev, "bus-width", 4); -#endif + + ret = mmc_of_parse(dev, cfg); + if (ret) + return ret; return 0; } @@ -101,19 +333,28 @@ static int rockchip_sdhci_bind(struct udevice *dev) return sdhci_bind(dev, &plat->mmc, &plat->cfg); } -static const struct udevice_id arasan_sdhci_ids[] = { - { .compatible = "arasan,sdhci-5.1" }, +static const struct sdhci_data rk3399_data = { + .emmc_set_clock = rk3399_sdhci_emmc_set_clock, + .get_phy = rk3399_emmc_get_phy, + .emmc_phy_init = rk3399_emmc_phy_init, +}; + +static const struct udevice_id sdhci_ids[] = { + { + .compatible = "arasan,sdhci-5.1", + .data = (ulong)&rk3399_data, + }, { } }; U_BOOT_DRIVER(arasan_sdhci_drv) = { - .name = "rockchip_rk3399_sdhci_5_1", + .name = "rockchip_sdhci_5_1", .id = UCLASS_MMC, - .of_match = arasan_sdhci_ids, - .of_to_plat = arasan_sdhci_of_to_plat, + .of_match = sdhci_ids, + .of_to_plat = rockchip_sdhci_of_to_plat, .ops = &sdhci_ops, .bind = rockchip_sdhci_bind, - .probe = arasan_sdhci_probe, + .probe = rockchip_sdhci_probe, .priv_auto = sizeof(struct rockchip_sdhc), .plat_auto = sizeof(struct rockchip_sdhc_plat), }; -- 2.39.5