[PATCH v2 1/3] mmc: rockchip_sdhci: add phy and clock config for rk3399
Peng Fan (OSS)
peng.fan at oss.nxp.com
Wed Jun 30 03:11:34 CEST 2021
On 2021/6/28 17:19, Yifeng Zhao wrote:
> 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.
One more generic question,
could phy part be moved to a phy driver?
Regards,
Peng.
> - 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 <yifeng.zhao at rock-chips.com>
> ---
>
> Changes in v2:
> - Add mmc_of_parse to parse dts config.
> - Used read_poll_timeout api to check dll lock status
> - Add execute tuning api for hs200 tuning
>
> drivers/mmc/rockchip_sdhci.c | 310 +++++++++++++++++++++++++++++++----
> 1 file changed, 274 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
> index d95f8b2a15..2973911446 100644
> --- a/drivers/mmc/rockchip_sdhci.c
> +++ b/drivers/mmc/rockchip_sdhci.c
> @@ -6,90 +6,319 @@
> */
>
> #include <common.h>
> +#include <clk.h>
> #include <dm.h>
> +#include <dm/ofnode.h>
> #include <dt-structs.h>
> +#include <linux/delay.h>
> #include <linux/err.h>
> #include <linux/libfdt.h>
> +#include <linux/iopoll.h>
> #include <malloc.h>
> #include <mapmem.h>
> +#include "mmc_private.h"
> #include <sdhci.h>
> -#include <clk.h>
> +#include <syscon.h>
> +#include <asm/arch-rockchip/clock.h>
> +#include <asm/arch-rockchip/hardware.h>
>
> /* 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__);
> + 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;
> + int max_clk = host->max_clk;
> + unsigned long mmc_clock;
> +
> + if (cycle_phy)
> + rk3399_emmc_phy_power_off(priv->phy);
> +
> + if (clock) {
> + mmc_clock = clk_set_rate(&priv->emmc_clk, clock);
> + if (IS_ERR_VALUE(mmc_clock))
> + host->max_clk = max_clk;
> + else
> + host->max_clk = mmc_clock;
> + }
> + sdhci_set_clock(host->mmc, clock);
> + if (!clock)
> + return 0;
> + host->max_clk = max_clk;
> +
> + 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;
> + 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;
> + 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);
> +
> + do {
> + cmd.cmdidx = opcode;
> + cmd.resp_type = MMC_RSP_R1;
> + cmd.cmdarg = 0;
> +
> + if (tuning_loop_counter-- == 0)
> + break;
> +
> + if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200 && host->mmc->bus_width == 8)
> + sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128), SDHCI_BLOCK_SIZE);
> + else
> + sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), SDHCI_BLOCK_SIZE);
> +
> + sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
> +
> + mmc_send_cmd(mmc, &cmd, NULL);
> +
> + 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 = -1;
> + }
> +
> + 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 0;
> +}
> +
> +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;
> + ret = data->get_phy(dev);
> + if (ret)
> + return ret;
> +
> + 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 +330,28 @@ 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),
> };
>
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