| Message ID | 20230901114336.31339-4-quic_nitirawa@quicinc.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | scsi: ufs: qcom: Align programming sequence as per HW spec | expand |
On Fri, Sep 01, 2023 at 05:13:33PM +0530, Nitin Rawat wrote: > Add Support to configure CORE_CLK_1US_CYCLES, PA_VS_CORE_CLK_40NS_CYCLES > for multiple unipro clock frequencies. Currently this is handled only for > only 150Mhz and 75MHz. > > Since different qualcomm targets support different unipro frequency, add > support to handle all other frequencies like 403MHz, 300MHz, 202MHz, > 150 MHz, 75Mhz, 37.5 MHz. > Please flip your commit message around, start with the problem description (the second paragraph), then the description of what you're changing. > Co-developed-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com> > Signed-off-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com> > Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> > --- > drivers/ufs/host/ufs-qcom.c | 96 ++++++++++++++++++++++++++++--------- > drivers/ufs/host/ufs-qcom.h | 10 ++++ > 2 files changed, 84 insertions(+), 22 deletions(-) > > diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c > index 018e391c276e..e3648e936498 100644 > --- a/drivers/ufs/host/ufs-qcom.c > +++ b/drivers/ufs/host/ufs-qcom.c > @@ -94,8 +94,7 @@ static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS]; > > static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host); > static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, > - u32 clk_cycles, > - u32 clk_40ns_cycles); > + bool is_max_freq); Odd indentation here. That said, I doubt that you need the line wrap now. > > static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd) > { > @@ -686,13 +685,14 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba, > return -EINVAL; > } > > - if (ufs_qcom_cap_qunipro(host)) > - /* > - * set unipro core clock cycles to 150 & clear clock > - * divider > - */ > - err = ufs_qcom_set_core_clk_ctrl(hba, > - 150, 6); > + if (ufs_qcom_cap_qunipro(host)) { > + err = ufs_qcom_set_core_clk_ctrl(hba, true); > + if (err) { > + dev_err(hba->dev, > + "%s cfg core clk ctrl failed\n", > + __func__); Please don't build error messages using __func__, describe the actual error, in English. > + } > + } > > /* > * Some UFS devices (and may be host) have issues if LCC is > @@ -1297,13 +1297,67 @@ static void ufs_qcom_exit(struct ufs_hba *hba) > phy_exit(host->generic_phy); > } > static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, > - u32 cycles_in_1us, > - u32 cycles_in_40ns) > + bool is_max_freq) You changed this function prototype in both patch 1 and patch 2, and now you're changing it again. What if you make this transition in patch 1, then you only need to change the prototype once. > { > struct ufs_qcom_host *host = ufshcd_get_variant(hba); > + struct list_head *head = &hba->clk_list_head; > u32 core_clk_ctrl_reg, reg; > + struct ufs_clk_info *clki; > + u32 cycles_in_1us, cycles_in_40ns; > int ret; > > + list_for_each_entry(clki, head, list) { > + if (!IS_ERR_OR_NULL(clki->clk) && > + !strcmp(clki->name, "core_clk_unipro")) { > + if (is_max_freq) > + cycles_in_1us = clki->max_freq; > + else > + cycles_in_1us = clk_get_rate(clki->clk); > + break; > + } > + } > + > + if ((cycles_in_1us % (1000 * 1000)) != 0) > + cycles_in_1us = cycles_in_1us/(1000 * 1000) + 1; > + else > + cycles_in_1us = cycles_in_1us/(1000 * 1000); > + Iiuc, the following 34 lines only apply to hw_ver >= 4. > + /* > + * Generic formulae for cycles_in_40ns = (freq_unipro/25) is not > + * applicable for all frequencies. For ex: ceil(37.5 MHz/25) will > + * be 2 and ceil(403 MHZ/25) will be 17 whereas Hardware > + * specification expect to be 16. Hence use exact hardware spec > + * mandated value for cycles_in_40ns instead of calculating using > + * generic formulae. > + */ > + switch (cycles_in_1us) { > + case UNIPRO_CORE_CLK_FREQ_403_MHZ: > + cycles_in_40ns = 16; > + break; > + case UNIPRO_CORE_CLK_FREQ_300_MHZ: > + cycles_in_40ns = 12; > + break; > + case UNIPRO_CORE_CLK_FREQ_201_5_MHZ: > + cycles_in_40ns = 8; > + break; > + case UNIPRO_CORE_CLK_FREQ_150_MHZ: > + cycles_in_40ns = 6; > + break; > + case UNIPRO_CORE_CLK_FREQ_100_MHZ: > + cycles_in_40ns = 4; > + break; > + case UNIPRO_CORE_CLK_FREQ_75_MHZ: > + cycles_in_40ns = 3; > + break; > + case UNIPRO_CORE_CLK_FREQ_37_5_MHZ: > + cycles_in_40ns = 2; > + break; > + default: > + ret = -EINVAL; 5 lines below, you're overwriting this value and moving on as if nothing happened. Doesn't your compiler complain that you then will use cycles_in_40ns without first initializing it in this case? > + dev_err(hba->dev, "UNIPRO clk freq %u MHz not supported\n", > + cycles_in_1us); > + } > + > ret = ufshcd_dme_get(hba, > UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), > &core_clk_ctrl_reg); > @@ -1326,7 +1380,7 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, > /* Clear CORE_CLK_DIV_EN */ > core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; The following 6 changes just corrects the compilation error you shouldn't have introduced in the previous patch. > > - err = ufshcd_dme_set(hba, > + ret = ufshcd_dme_set(hba, > UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), > core_clk_ctrl_reg); > /* > @@ -1334,25 +1388,25 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, > * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed > * frequency of unipro core clk of UFS host controller. > */ > - if (!err && (host->hw_ver.major >= 4)) { > + if (!ret && (host->hw_ver.major >= 4)) { > if (cycles_in_40ns > PA_VS_CORE_CLK_40NS_CYCLES_MASK) > return -EINVAL; > > - err = ufshcd_dme_get(hba, > + ret = ufshcd_dme_get(hba, > UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), > ®); > - if (err) > - return err; > + if (ret) > + return ret; > > reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK; > reg |= cycles_in_40ns; > > - err = ufshcd_dme_set(hba, > + ret = ufshcd_dme_set(hba, > UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), > reg); > } > > - return err; > + return ret; > } > > static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba) > @@ -1368,8 +1422,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba) > if (!ufs_qcom_cap_qunipro(host)) > return 0; > > - /* set unipro core clock cycles to 150 and clear clock divider */ > - return ufs_qcom_set_core_clk_ctrl(hba, 150, 6); > + return ufs_qcom_set_core_clk_ctrl(hba, true); > } > > static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba) > @@ -1404,8 +1457,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) > if (!ufs_qcom_cap_qunipro(host)) > return 0; > > - /* set unipro core clock cycles to 75 and clear clock divider */ > - return ufs_qcom_set_core_clk_ctrl(hba, 75, 3); > + return ufs_qcom_set_core_clk_ctrl(hba, false); > } > > static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, > diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h > index d81bf1a1b77a..bc176ef58e3e 100644 > --- a/drivers/ufs/host/ufs-qcom.h > +++ b/drivers/ufs/host/ufs-qcom.h > @@ -9,6 +9,7 @@ > #include <linux/reset.h> > #include <soc/qcom/ice.h> > #include <ufs/ufshcd.h> > +#include <linux/math.h> Why is math.h needed in this header file now? Regards, Bjorn > > #define MAX_UFS_QCOM_HOSTS 1 > #define MAX_U32 (~(u32)0) > @@ -79,6 +80,15 @@ enum { > UFS_MEM_CQIS_VS = 0x8, > }; > > +/* QCOM UFS host controller core clk frequencies */ > +#define UNIPRO_CORE_CLK_FREQ_37_5_MHZ 38 > +#define UNIPRO_CORE_CLK_FREQ_75_MHZ 75 > +#define UNIPRO_CORE_CLK_FREQ_100_MHZ 100 > +#define UNIPRO_CORE_CLK_FREQ_150_MHZ 150 > +#define UNIPRO_CORE_CLK_FREQ_300_MHZ 300 > +#define UNIPRO_CORE_CLK_FREQ_201_5_MHZ 202 > +#define UNIPRO_CORE_CLK_FREQ_403_MHZ 403 > + > #define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x) (0x000 + x) > #define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x) (0x400 + x) > > -- > 2.17.1 >
On 9/1/2023 9:10 PM, Bjorn Andersson wrote: > On Fri, Sep 01, 2023 at 05:13:33PM +0530, Nitin Rawat wrote: >> Add Support to configure CORE_CLK_1US_CYCLES, PA_VS_CORE_CLK_40NS_CYCLES >> for multiple unipro clock frequencies. Currently this is handled only for >> only 150Mhz and 75MHz. >> >> Since different qualcomm targets support different unipro frequency, add >> support to handle all other frequencies like 403MHz, 300MHz, 202MHz, >> 150 MHz, 75Mhz, 37.5 MHz. >> > > Please flip your commit message around, start with the problem > description (the second paragraph), then the description of what you're > changing. Sure will address this in next patchset. > >> Co-developed-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com> >> Signed-off-by: Naveen Kumar Goud Arepalli <quic_narepall@quicinc.com> >> Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> >> --- >> drivers/ufs/host/ufs-qcom.c | 96 ++++++++++++++++++++++++++++--------- >> drivers/ufs/host/ufs-qcom.h | 10 ++++ >> 2 files changed, 84 insertions(+), 22 deletions(-) >> >> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c >> index 018e391c276e..e3648e936498 100644 >> --- a/drivers/ufs/host/ufs-qcom.c >> +++ b/drivers/ufs/host/ufs-qcom.c >> @@ -94,8 +94,7 @@ static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS]; >> >> static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host); >> static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, >> - u32 clk_cycles, >> - u32 clk_40ns_cycles); >> + bool is_max_freq); > > Odd indentation here. That said, I doubt that you need the line wrap > now. Sure will address this in next patchset. > >> >> static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd) >> { >> @@ -686,13 +685,14 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba, >> return -EINVAL; >> } >> >> - if (ufs_qcom_cap_qunipro(host)) >> - /* >> - * set unipro core clock cycles to 150 & clear clock >> - * divider >> - */ >> - err = ufs_qcom_set_core_clk_ctrl(hba, >> - 150, 6); >> + if (ufs_qcom_cap_qunipro(host)) { >> + err = ufs_qcom_set_core_clk_ctrl(hba, true); >> + if (err) { >> + dev_err(hba->dev, >> + "%s cfg core clk ctrl failed\n", >> + __func__); > > Please don't build error messages using __func__, describe the actual > error, in English. Sure will address this in next patchset. > >> + } >> + } >> >> /* >> * Some UFS devices (and may be host) have issues if LCC is >> @@ -1297,13 +1297,67 @@ static void ufs_qcom_exit(struct ufs_hba *hba) >> phy_exit(host->generic_phy); >> } >> static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, >> - u32 cycles_in_1us, >> - u32 cycles_in_40ns) >> + bool is_max_freq) > > You changed this function prototype in both patch 1 and patch 2, and now > you're changing it again. What if you make this transition in patch 1, > then you only need to change the prototype once. Sure we will change the order of patch so that prototype will change in 1 place. > >> { >> struct ufs_qcom_host *host = ufshcd_get_variant(hba); >> + struct list_head *head = &hba->clk_list_head; >> u32 core_clk_ctrl_reg, reg; >> + struct ufs_clk_info *clki; >> + u32 cycles_in_1us, cycles_in_40ns; >> int ret; >> >> + list_for_each_entry(clki, head, list) { >> + if (!IS_ERR_OR_NULL(clki->clk) && >> + !strcmp(clki->name, "core_clk_unipro")) { >> + if (is_max_freq) >> + cycles_in_1us = clki->max_freq; >> + else >> + cycles_in_1us = clk_get_rate(clki->clk); >> + break; >> + } >> + } >> + >> + if ((cycles_in_1us % (1000 * 1000)) != 0) >> + cycles_in_1us = cycles_in_1us/(1000 * 1000) + 1; >> + else >> + cycles_in_1us = cycles_in_1us/(1000 * 1000); >> + > > Iiuc, the following 34 lines only apply to hw_ver >= 4. Sure...Will address this in next patchset. > >> + /* >> + * Generic formulae for cycles_in_40ns = (freq_unipro/25) is not >> + * applicable for all frequencies. For ex: ceil(37.5 MHz/25) will >> + * be 2 and ceil(403 MHZ/25) will be 17 whereas Hardware >> + * specification expect to be 16. Hence use exact hardware spec >> + * mandated value for cycles_in_40ns instead of calculating using >> + * generic formulae. >> + */ >> + switch (cycles_in_1us) { >> + case UNIPRO_CORE_CLK_FREQ_403_MHZ: >> + cycles_in_40ns = 16; >> + break; >> + case UNIPRO_CORE_CLK_FREQ_300_MHZ: >> + cycles_in_40ns = 12; >> + break; >> + case UNIPRO_CORE_CLK_FREQ_201_5_MHZ: >> + cycles_in_40ns = 8; >> + break; >> + case UNIPRO_CORE_CLK_FREQ_150_MHZ: >> + cycles_in_40ns = 6; >> + break; >> + case UNIPRO_CORE_CLK_FREQ_100_MHZ: >> + cycles_in_40ns = 4; >> + break; >> + case UNIPRO_CORE_CLK_FREQ_75_MHZ: >> + cycles_in_40ns = 3; >> + break; >> + case UNIPRO_CORE_CLK_FREQ_37_5_MHZ: >> + cycles_in_40ns = 2; >> + break; >> + default: >> + ret = -EINVAL; > - In next patchset we are returning Error from default case. > 5 lines below, you're overwriting this value and moving on as if nothing > happened. Doesn't your compiler complain that you then will use > cycles_in_40ns without first initializing it in this case? > >> + dev_err(hba->dev, "UNIPRO clk freq %u MHz not supported\n", >> + cycles_in_1us); >> + } >> + >> ret = ufshcd_dme_get(hba, >> UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), >> &core_clk_ctrl_reg); >> @@ -1326,7 +1380,7 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, >> /* Clear CORE_CLK_DIV_EN */ >> core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; > > The following 6 changes just corrects the compilation error you > shouldn't have introduced in the previous patch. > >> >> - err = ufshcd_dme_set(hba, >> + ret = ufshcd_dme_set(hba, >> UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), >> core_clk_ctrl_reg); >> /* >> @@ -1334,25 +1388,25 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, >> * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed >> * frequency of unipro core clk of UFS host controller. >> */ >> - if (!err && (host->hw_ver.major >= 4)) { >> + if (!ret && (host->hw_ver.major >= 4)) { >> if (cycles_in_40ns > PA_VS_CORE_CLK_40NS_CYCLES_MASK) >> return -EINVAL; >> >> - err = ufshcd_dme_get(hba, >> + ret = ufshcd_dme_get(hba, >> UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), >> ®); >> - if (err) >> - return err; >> + if (ret) >> + return ret; >> >> reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK; >> reg |= cycles_in_40ns; >> >> - err = ufshcd_dme_set(hba, >> + ret = ufshcd_dme_set(hba, >> UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), >> reg); >> } >> >> - return err; >> + return ret; >> } >> >> static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba) >> @@ -1368,8 +1422,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba) >> if (!ufs_qcom_cap_qunipro(host)) >> return 0; >> >> - /* set unipro core clock cycles to 150 and clear clock divider */ >> - return ufs_qcom_set_core_clk_ctrl(hba, 150, 6); >> + return ufs_qcom_set_core_clk_ctrl(hba, true); >> } >> >> static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba) >> @@ -1404,8 +1457,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) >> if (!ufs_qcom_cap_qunipro(host)) >> return 0; >> >> - /* set unipro core clock cycles to 75 and clear clock divider */ >> - return ufs_qcom_set_core_clk_ctrl(hba, 75, 3); >> + return ufs_qcom_set_core_clk_ctrl(hba, false); >> } >> >> static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, >> diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h >> index d81bf1a1b77a..bc176ef58e3e 100644 >> --- a/drivers/ufs/host/ufs-qcom.h >> +++ b/drivers/ufs/host/ufs-qcom.h >> @@ -9,6 +9,7 @@ >> #include <linux/reset.h> >> #include <soc/qcom/ice.h> >> #include <ufs/ufshcd.h> >> +#include <linux/math.h> > > Why is math.h needed in this header file now? Removed it. > > Regards, > Bjorn > >> >> #define MAX_UFS_QCOM_HOSTS 1 >> #define MAX_U32 (~(u32)0) >> @@ -79,6 +80,15 @@ enum { >> UFS_MEM_CQIS_VS = 0x8, >> }; >> >> +/* QCOM UFS host controller core clk frequencies */ >> +#define UNIPRO_CORE_CLK_FREQ_37_5_MHZ 38 >> +#define UNIPRO_CORE_CLK_FREQ_75_MHZ 75 >> +#define UNIPRO_CORE_CLK_FREQ_100_MHZ 100 >> +#define UNIPRO_CORE_CLK_FREQ_150_MHZ 150 >> +#define UNIPRO_CORE_CLK_FREQ_300_MHZ 300 >> +#define UNIPRO_CORE_CLK_FREQ_201_5_MHZ 202 >> +#define UNIPRO_CORE_CLK_FREQ_403_MHZ 403 >> + >> #define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x) (0x000 + x) >> #define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x) (0x400 + x) >> >> -- >> 2.17.1 >>
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 018e391c276e..e3648e936498 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -94,8 +94,7 @@ static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS]; static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host); static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, - u32 clk_cycles, - u32 clk_40ns_cycles); + bool is_max_freq); static struct ufs_qcom_host *rcdev_to_ufs_host(struct reset_controller_dev *rcd) { @@ -686,13 +685,14 @@ static int ufs_qcom_link_startup_notify(struct ufs_hba *hba, return -EINVAL; } - if (ufs_qcom_cap_qunipro(host)) - /* - * set unipro core clock cycles to 150 & clear clock - * divider - */ - err = ufs_qcom_set_core_clk_ctrl(hba, - 150, 6); + if (ufs_qcom_cap_qunipro(host)) { + err = ufs_qcom_set_core_clk_ctrl(hba, true); + if (err) { + dev_err(hba->dev, + "%s cfg core clk ctrl failed\n", + __func__); + } + } /* * Some UFS devices (and may be host) have issues if LCC is @@ -1297,13 +1297,67 @@ static void ufs_qcom_exit(struct ufs_hba *hba) phy_exit(host->generic_phy); } static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, - u32 cycles_in_1us, - u32 cycles_in_40ns) + bool is_max_freq) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); + struct list_head *head = &hba->clk_list_head; u32 core_clk_ctrl_reg, reg; + struct ufs_clk_info *clki; + u32 cycles_in_1us, cycles_in_40ns; int ret; + list_for_each_entry(clki, head, list) { + if (!IS_ERR_OR_NULL(clki->clk) && + !strcmp(clki->name, "core_clk_unipro")) { + if (is_max_freq) + cycles_in_1us = clki->max_freq; + else + cycles_in_1us = clk_get_rate(clki->clk); + break; + } + } + + if ((cycles_in_1us % (1000 * 1000)) != 0) + cycles_in_1us = cycles_in_1us/(1000 * 1000) + 1; + else + cycles_in_1us = cycles_in_1us/(1000 * 1000); + + /* + * Generic formulae for cycles_in_40ns = (freq_unipro/25) is not + * applicable for all frequencies. For ex: ceil(37.5 MHz/25) will + * be 2 and ceil(403 MHZ/25) will be 17 whereas Hardware + * specification expect to be 16. Hence use exact hardware spec + * mandated value for cycles_in_40ns instead of calculating using + * generic formulae. + */ + switch (cycles_in_1us) { + case UNIPRO_CORE_CLK_FREQ_403_MHZ: + cycles_in_40ns = 16; + break; + case UNIPRO_CORE_CLK_FREQ_300_MHZ: + cycles_in_40ns = 12; + break; + case UNIPRO_CORE_CLK_FREQ_201_5_MHZ: + cycles_in_40ns = 8; + break; + case UNIPRO_CORE_CLK_FREQ_150_MHZ: + cycles_in_40ns = 6; + break; + case UNIPRO_CORE_CLK_FREQ_100_MHZ: + cycles_in_40ns = 4; + break; + case UNIPRO_CORE_CLK_FREQ_75_MHZ: + cycles_in_40ns = 3; + break; + case UNIPRO_CORE_CLK_FREQ_37_5_MHZ: + cycles_in_40ns = 2; + break; + default: + ret = -EINVAL; + dev_err(hba->dev, "UNIPRO clk freq %u MHz not supported\n", + cycles_in_1us); + } + ret = ufshcd_dme_get(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), &core_clk_ctrl_reg); @@ -1326,7 +1380,7 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, /* Clear CORE_CLK_DIV_EN */ core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; - err = ufshcd_dme_set(hba, + ret = ufshcd_dme_set(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), core_clk_ctrl_reg); /* @@ -1334,25 +1388,25 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed * frequency of unipro core clk of UFS host controller. */ - if (!err && (host->hw_ver.major >= 4)) { + if (!ret && (host->hw_ver.major >= 4)) { if (cycles_in_40ns > PA_VS_CORE_CLK_40NS_CYCLES_MASK) return -EINVAL; - err = ufshcd_dme_get(hba, + ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), ®); - if (err) - return err; + if (ret) + return ret; reg &= ~PA_VS_CORE_CLK_40NS_CYCLES_MASK; reg |= cycles_in_40ns; - err = ufshcd_dme_set(hba, + ret = ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CORE_CLK_40NS_CYCLES), reg); } - return err; + return ret; } static int ufs_qcom_clk_scale_up_pre_change(struct ufs_hba *hba) @@ -1368,8 +1422,7 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba) if (!ufs_qcom_cap_qunipro(host)) return 0; - /* set unipro core clock cycles to 150 and clear clock divider */ - return ufs_qcom_set_core_clk_ctrl(hba, 150, 6); + return ufs_qcom_set_core_clk_ctrl(hba, true); } static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba) @@ -1404,8 +1457,7 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) if (!ufs_qcom_cap_qunipro(host)) return 0; - /* set unipro core clock cycles to 75 and clear clock divider */ - return ufs_qcom_set_core_clk_ctrl(hba, 75, 3); + return ufs_qcom_set_core_clk_ctrl(hba, false); } static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index d81bf1a1b77a..bc176ef58e3e 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -9,6 +9,7 @@ #include <linux/reset.h> #include <soc/qcom/ice.h> #include <ufs/ufshcd.h> +#include <linux/math.h> #define MAX_UFS_QCOM_HOSTS 1 #define MAX_U32 (~(u32)0) @@ -79,6 +80,15 @@ enum { UFS_MEM_CQIS_VS = 0x8, }; +/* QCOM UFS host controller core clk frequencies */ +#define UNIPRO_CORE_CLK_FREQ_37_5_MHZ 38 +#define UNIPRO_CORE_CLK_FREQ_75_MHZ 75 +#define UNIPRO_CORE_CLK_FREQ_100_MHZ 100 +#define UNIPRO_CORE_CLK_FREQ_150_MHZ 150 +#define UNIPRO_CORE_CLK_FREQ_300_MHZ 300 +#define UNIPRO_CORE_CLK_FREQ_201_5_MHZ 202 +#define UNIPRO_CORE_CLK_FREQ_403_MHZ 403 + #define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x) (0x000 + x) #define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x) (0x400 + x)