[PATCH v2 1/3] mmc: rockchip_sdhci: add phy and clock config for rk3399
Yifeng Zhao
yifeng.zhao at rock-chips.com
Mon Jun 28 11:19:50 CEST 2021
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 <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),
};
--
2.17.1
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