[PATCH v1 1/2] mmc: rockchip_sdhci: add phy and clock config for rk3399
Jaehoon Chung
jh80.chung at samsung.com
Tue Jun 8 00:13:52 CEST 2021
Hi Yifeng,
On 6/7/21 4:38 PM, Yifeng Zhao wrote:
> Add clock, phy and other configuration, it is convenient to support
> new controller. Here a short summary of the changes:
> - support HS200 and HS400 config by dts
> - Remove OF_PLATDATA related code
> - Reorder header inclusion
> - Add data width config for 1, 4, 8 bits
> - Add phy ops
> - add ops set_ios_post to modify the parameters of phy when the
> clock changes
Does it impossible to move to phy subsystem about codes relevant to phy?
>
> Signed-off-by: Yifeng Zhao <yifeng.zhao at rock-chips.com>
> ---
>
> drivers/mmc/rockchip_sdhci.c | 334 +++++++++++++++++++++++++++++++----
> 1 file changed, 303 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
> index d95f8b2a15..05ed998eca 100644
> --- a/drivers/mmc/rockchip_sdhci.c
> +++ b/drivers/mmc/rockchip_sdhci.c
> @@ -6,33 +6,285 @@
> */
>
> #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 <malloc.h>
> #include <mapmem.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 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
>
> 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;
> + uint start;
> +
> + 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]);
> +
> + start = get_timer(0);
> +
> + do {
> + udelay(1);
> + dllrdy = readl(&phy->emmcphy_status);
> + dllrdy = (dllrdy >> PHYCTRL_DLLRDY_SHIFT) & PHYCTRL_DLLRDY_MASK;
> + if (dllrdy == PHYCTRL_DLLRDY_DONE)
> + break;
> + } while (get_timer(start) < 50000);
> +
> + if (dllrdy != PHYCTRL_DLLRDY_DONE)
> + printf("%s: dllrdy timeout.\n", __func__);
> +}
> +
> +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 rockchip_emmc_set_clock(struct sdhci_host *host, unsigned int clock)
Does it impossible to reuse sdhci_set_clock()? It's almmost similar, except clk_set_rate().
> +{
> + unsigned int div, clk = 0, timeout;
> + unsigned int input_clk;
> + struct rockchip_sdhc *priv =
> + container_of(host, struct rockchip_sdhc, host);
> +
> + /* Wait max 20 ms */
> + timeout = 2000;
> + while (sdhci_readl(host, SDHCI_PRESENT_STATE) &
> + (SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
> + if (timeout == 0) {
> + printf("%s: Timeout to wait cmd & data inhibit\n",
> + __func__);
> + return -EBUSY;
> + }
> +
> + timeout--;
> + udelay(10);
> + }
> + sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
> +
> + if (clock == 0)
> + return 0;
> +
> + input_clk = clk_set_rate(&priv->emmc_clk, clock);
> + if (IS_ERR_VALUE(input_clk))
> + input_clk = host->max_clk;
> +
> + if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
> + /*
> + * Check if the Host Controller supports Programmable Clock
> + * Mode.
> + */
> + if (host->clk_mul) {
> + for (div = 1; div <= 1024; div++) {
> + if ((input_clk / div) <= clock)
> + break;
> + }
> +
> + /*
> + * Set Programmable Clock Mode in the Clock
> + * Control register.
> + */
> + clk = SDHCI_PROG_CLOCK_MODE;
> + div--;
> + } else {
> + /* Version 3.00 divisors must be a multiple of 2. */
> + if (input_clk <= clock) {
> + div = 1;
> + } else {
> + for (div = 2;
> + div < SDHCI_MAX_DIV_SPEC_300;
> + div += 2) {
> + if ((input_clk / div) <= clock)
> + break;
> + }
> + }
> + div >>= 1;
> + }
> + } else {
> + /* Version 2.00 divisors must be a power of 2. */
> + for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
> + if ((input_clk / div) <= clock)
> + break;
> + }
> + div >>= 1;
> + }
> +
> + clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
> + clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
> + << SDHCI_DIVIDER_HI_SHIFT;
> + clk |= SDHCI_CLOCK_INT_EN;
> + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
> +
> + /* Wait max 20 ms */
> + timeout = 2000;
> + while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
> + & SDHCI_CLOCK_INT_STABLE)) {
> + if (timeout == 0) {
> + printf("%s: Internal clock never stabilised.\n",
> + __func__);
> + return -EBUSY;
> + }
> + timeout--;
> + udelay(10);
> + }
> + clk |= SDHCI_CLOCK_CARD_EN;
> + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
> + host->clock = clock;
> +
> + return 0;
> +}
> +
> +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;
> +
> + if (cycle_phy)
> + rk3399_emmc_phy_power_off(priv->phy);
> +
> + rockchip_emmc_set_clock(host, clock);
> +
> + if (cycle_phy)
> + rk3399_emmc_phy_power_on(priv->phy, clock);
> +
> + return 0;
> +}
> +
> +static int sdhci_set_ios_post(struct sdhci_host *host)
rockchip_sdhci_set_ios_post?
> +{
> + struct mmc *mmc = host->mmc;
> + struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
> + struct sdhci_data *data = (struct sdhci_data *)dev_get_driver_data(priv->dev);
> +
> + data->emmc_set_clock(host, mmc->clock);
> +
> + return 0;
> +}
> +
> +static struct sdhci_ops rockchip_sdhci_ops = {
> + .set_ios_post = sdhci_set_ios_post,
> };
>
> -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);
> @@ -40,17 +292,22 @@ static int arasan_sdhci_probe(struct udevice *dev)
> int max_frequency, ret;
> struct clk clk;
>
> -#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);
> + switch (dev_read_u32_default(dev, "bus-width", 4)) {
> + case 8:
> + host->host_caps |= MMC_MODE_8BIT;
> + break;
> + case 4:
> + host->host_caps |= MMC_MODE_4BIT;
> + break;
> + case 1:
> + break;
> + default:
> + printf("Invalid \"bus-width\" value\n");
> + return -EINVAL;
> + }
Use mmc_of_parse().
> ret = clk_get_by_index(dev, 0, &clk);
> -#endif
> +
> if (!ret) {
> ret = clk_set_rate(&clk, max_frequency);
> if (IS_ERR_VALUE(ret))
> @@ -59,16 +316,25 @@ static int arasan_sdhci_probe(struct udevice *dev)
> 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;
>
> + if (dev_read_bool(dev, "mmc-hs200-1_8v"))
> + host->host_caps |= MMC_MODE_HS200;
> + else if (dev_read_bool(dev, "mmc-hs400-1_8v"))
> + host->host_caps |= MMC_MODE_HS400;
> host->mmc = &plat->mmc;
> host->mmc->priv = &prv->host;
> host->mmc->dev = dev;
> @@ -81,15 +347,12 @@ static int arasan_sdhci_probe(struct udevice *dev)
> return sdhci_probe(dev);
> }
>
> -static int arasan_sdhci_of_to_plat(struct udevice *dev)
> +static int sdhci_of_to_plat(struct udevice *dev)
> {
> -#if !CONFIG_IS_ENABLED(OF_PLATDATA)
> struct sdhci_host *host = dev_get_priv(dev);
>
> host->name = dev->name;
> host->ioaddr = dev_read_addr_ptr(dev);
> - host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
> -#endif
>
> return 0;
> }
> @@ -101,19 +364,28 @@ 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 = 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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