| Message ID | 1430985401-12202-4-git-send-email-zhangfei.gao@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 05/14/2015 06:17 AM, Jaehoon Chung wrote: > On 05/07/2015 04:56 PM, Zhangfei Gao wrote: >> Support hi6220, tested on hikey board >> emmc: support hs >> sd: support hs, sdr12, sdr25 >> >> Signed-off-by: Jorge A. Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> >> Signed-off-by: Dan Yuan <yuandan@hisilicon.com> >> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> >> --- >> drivers/mmc/host/dw_mmc-k3.c | 101 ++++++++++++++++++++++++++++++++++++++++++- >> 1 file changed, 99 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c >> index 650f9cc..bc16bee 100644 >> --- a/drivers/mmc/host/dw_mmc-k3.c >> +++ b/drivers/mmc/host/dw_mmc-k3.c >> @@ -8,16 +8,28 @@ >> * (at your option) any later version. >> */ >> >> -#include <linux/module.h> >> -#include <linux/platform_device.h> >> #include <linux/clk.h> >> +#include <linux/mfd/syscon.h> >> #include <linux/mmc/host.h> >> #include <linux/mmc/dw_mmc.h> >> +#include <linux/module.h> >> #include <linux/of_address.h> >> +#include <linux/platform_device.h> >> +#include <linux/regmap.h> >> +#include <linux/regulator/consumer.h> >> >> #include "dw_mmc.h" >> #include "dw_mmc-pltfm.h" >> >> +#define AO_SCTRL_SEL18 BIT(10) >> +#define AO_SCTRL_CTRL3 0x40C > > how about adding the comment? Sure > >> + >> +#define SDMMC_CMD_DISABLE_BOOT BIT(26) > > I can't find where this define is used. My bad, the usage is removed for simple, will remove this as well > >> + >> +struct k3_priv { >> + struct regmap *reg; >> +}; >> + >> static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios) >> { >> int ret; >> @@ -33,8 +45,93 @@ static const struct dw_mci_drv_data k3_drv_data = { >> .set_ios = dw_mci_k3_set_ios, >> }; >> >> +static int dw_mci_hi6220_parse_dt(struct dw_mci *host) >> +{ >> + struct k3_priv *priv; >> + >> + priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL); >> + if (!priv) >> + return -ENOMEM; >> + >> + priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node, >> + "hisilicon,peripheral-syscon"); >> + if (IS_ERR(priv->reg)) >> + priv->reg = NULL; >> + >> + host->priv = priv; >> + return 0; >> +} >> + >> +static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) >> +{ >> + struct dw_mci_slot *slot = mmc_priv(mmc); >> + struct k3_priv *priv; >> + struct dw_mci *host; >> + int min_uv, max_uv; >> + int ret; >> + >> + host = slot->host; >> + priv = host->priv; >> + >> + if (!priv || !priv->reg) >> + return 0; > > Is it right that return to 0? Since only sd need voltage switch and the register AO_SCTRL only takes care of sd. While emmc directly use 1.8v single voltage, so directly return 0. > >> + >> + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { >> + ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3, >> + AO_SCTRL_SEL18, 0); >> + min_uv = 3000000; >> + max_uv = 3000000; >> + } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { >> + ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3, >> + AO_SCTRL_SEL18, AO_SCTRL_SEL18); >> + min_uv = 1800000; >> + max_uv = 1800000; > > max_uv and min_uv are fixed as 3.0v and 1.8V? Double confirmed with hisilicon, their controller has to be set 3v or 1.8v for io voltage. Otherwise it can not work. Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c index 650f9cc..bc16bee 100644 --- a/drivers/mmc/host/dw_mmc-k3.c +++ b/drivers/mmc/host/dw_mmc-k3.c @@ -8,16 +8,28 @@ * (at your option) any later version. */ -#include <linux/module.h> -#include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/mfd/syscon.h> #include <linux/mmc/host.h> #include <linux/mmc/dw_mmc.h> +#include <linux/module.h> #include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include "dw_mmc.h" #include "dw_mmc-pltfm.h" +#define AO_SCTRL_SEL18 BIT(10) +#define AO_SCTRL_CTRL3 0x40C + +#define SDMMC_CMD_DISABLE_BOOT BIT(26) + +struct k3_priv { + struct regmap *reg; +}; + static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios) { int ret; @@ -33,8 +45,93 @@ static const struct dw_mci_drv_data k3_drv_data = { .set_ios = dw_mci_k3_set_ios, }; +static int dw_mci_hi6220_parse_dt(struct dw_mci *host) +{ + struct k3_priv *priv; + + priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node, + "hisilicon,peripheral-syscon"); + if (IS_ERR(priv->reg)) + priv->reg = NULL; + + host->priv = priv; + return 0; +} + +static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct dw_mci_slot *slot = mmc_priv(mmc); + struct k3_priv *priv; + struct dw_mci *host; + int min_uv, max_uv; + int ret; + + host = slot->host; + priv = host->priv; + + if (!priv || !priv->reg) + return 0; + + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { + ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3, + AO_SCTRL_SEL18, 0); + min_uv = 3000000; + max_uv = 3000000; + } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { + ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3, + AO_SCTRL_SEL18, AO_SCTRL_SEL18); + min_uv = 1800000; + max_uv = 1800000; + } else { + dev_dbg(host->dev, "voltage not supported\n"); + return -EINVAL; + } + + if (ret) { + dev_dbg(host->dev, "switch voltage failed\n"); + return ret; + } + + if (IS_ERR_OR_NULL(mmc->supply.vqmmc)) + return 0; + + ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv); + if (ret) { + dev_dbg(host->dev, "Regulator set error %d: %d - %d\n", + ret, min_uv, max_uv); + return ret; + } + + return 0; +} + +static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios) +{ + int ret; + unsigned int clock; + + clock = (ios->clock <= 25000000) ? 25000000 : ios->clock; + + ret = clk_set_rate(host->biu_clk, clock); + if (ret) + dev_warn(host->dev, "failed to set rate %uHz\n", clock); + + host->bus_hz = clk_get_rate(host->biu_clk); +} + +static const struct dw_mci_drv_data hi6220_data = { + .switch_voltage = dw_mci_hi6220_switch_voltage, + .set_ios = dw_mci_hi6220_set_ios, + .parse_dt = dw_mci_hi6220_parse_dt, +}; + static const struct of_device_id dw_mci_k3_match[] = { { .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, }, + { .compatible = "hisilicon,hi6220-dw-mshc", .data = &hi6220_data, }, {}, }; MODULE_DEVICE_TABLE(of, dw_mci_k3_match);