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SubjectRe: [PATCH v3] mfd: Add support for RTS5250S power saving
On Tue, 22 Aug 2017, rui_feng@realsil.com.cn wrote:

> From: Rui Feng <rui_feng@realsil.com.cn>
>
> Signed-off-by: Rui Feng <rui_feng@realsil.com.cn>
> ---
> drivers/mfd/rts5249.c | 195 ++++++++++++++++++++++++++++++++++++++++
> drivers/mfd/rtsx_pcr.c | 205 +++++++++++++++++++++++++++++++++++++++++--
> drivers/mfd/rtsx_pcr.h | 11 +++
> include/linux/mfd/rtsx_pci.h | 60 +++++++++++++
> 4 files changed, 466 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
> index 40f8bb1..3959ada 100644
> --- a/drivers/mfd/rts5249.c
> +++ b/drivers/mfd/rts5249.c
> @@ -103,8 +103,72 @@ static void rtsx_base_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
> rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
> }
>
> +static int rts5249_init_from_cfg(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &(pcr->option);
> + u32 lval;
> +
> + if (CHK_PCI_PID(pcr, PID_524A))
> + rtsx_pci_read_config_dword(pcr,
> + PCR_ASPM_SETTING_REG1, &lval);
> + else
> + rtsx_pci_read_config_dword(pcr,
> + PCR_ASPM_SETTING_REG2, &lval);
> +
> + if (lval & ASPM_L1_1_EN_MASK)
> + rtsx_set_dev_flag(pcr, ASPM_L1_1_EN);
> + else
> + rtsx_clear_dev_flag(pcr, ASPM_L1_1_EN);

'\n' here.

> + if (lval & ASPM_L1_2_EN_MASK)
> + rtsx_set_dev_flag(pcr, ASPM_L1_2_EN);
> + else
> + rtsx_clear_dev_flag(pcr, ASPM_L1_2_EN);

Why don't you ensure all flags are already clear? That way you can
drop all of the clear flag calls and only set them when you know they
are available.

> + if (lval & PM_L1_1_EN_MASK)
> + rtsx_set_dev_flag(pcr, PM_L1_1_EN);
> + else
> + rtsx_clear_dev_flag(pcr, PM_L1_1_EN);

'\n' here.

> + if (lval & PM_L1_2_EN_MASK)
> + rtsx_set_dev_flag(pcr, PM_L1_2_EN);
> + else
> + rtsx_clear_dev_flag(pcr, PM_L1_2_EN);
> +
> + if (option->ltr_en) {
> + u16 val;
> +
> + pcie_capability_read_word(pcr->pci, PCI_EXP_DEVCTL2, &val);
> + if (val & PCI_EXP_DEVCTL2_LTR_EN) {
> + option->ltr_enabled = true;
> + option->ltr_active = true;
> + rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
> + } else {
> + option->ltr_enabled = false;
> + }

No need for single line statements to be in {}'s.

> + }
> +
> + return 0;

Why does this function return int?

You don't even check the return value.

> +}
> +
> +static int rts5249_init_from_hw(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &(pcr->option);
> +
> + if (rtsx_check_dev_flag(pcr, ASPM_L1_1_EN | ASPM_L1_2_EN
> + | PM_L1_1_EN | PM_L1_2_EN))
> + option->force_clkreq_0 = false;
> + else
> + option->force_clkreq_0 = true;
> +
> + return 0;
> +}
> +
> static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
> {
> + struct rtsx_cr_option *option = &(pcr->option);
> +
> + rts5249_init_from_cfg(pcr);
> + rts5249_init_from_hw(pcr);
> +
> rtsx_pci_init_cmd(pcr);
>
> /* Rest L1SUB Config */
> @@ -125,6 +189,17 @@ static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
> else
> rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0xB0, 0x80);
>
> + /*
> + * u_force_clkreq_0
> + * If true, CLKREQ# PIN will be forced to drive low to request clock
> + */

"If u_force_clkreq_0 is enabled, we forcibly request the XXX clock."

> + if (option->force_clkreq_0)
> + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG,
> + FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_LOW);
> + else
> + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG,
> + FORCE_CLKREQ_DELINK_MASK, FORCE_CLKREQ_HIGH);
> +
> return rtsx_pci_send_cmd(pcr, 100);
> }
>
> @@ -353,6 +428,8 @@ static int rtsx_base_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
>
> void rts5249_init_params(struct rtsx_pcr *pcr)
> {
> + struct rtsx_cr_option *option = &(pcr->option);
> +
> pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
> pcr->num_slots = 2;
> pcr->ops = &rts5249_pcr_ops;
> @@ -372,6 +449,20 @@ void rts5249_init_params(struct rtsx_pcr *pcr)
> pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
>
> pcr->reg_pm_ctrl3 = PM_CTRL3;
> +
> + option->dev_flags |= (LTR_L1SS_PWR_GATE_CHECK_CARD_EN
> + | LTR_L1SS_PWR_GATE_EN);
> + option->ltr_en = true;
> +
> + /* init latency of active, idle, L1OFF to 60us, 300us, 3ms */
> + option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEFAULT;
> + option->ltr_idle_latency = LTR_IDLE_LATENCY_DEFAULT;
> + option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEFAULT;
> + option->dev_aspm_mode = DEV_ASPM_DYNAMIC;
> + option->l1_snooze_delay = 1;

1 what?

> + option->ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5249_DEFAULT;
> + option->ltr_l1off_snooze_sspwrgate =
> + LTR_L1OFF_SNOOZE_SSPWRGATE_5249_DEFAULT;
> }
>
> static int rts524a_write_phy(struct rtsx_pcr *pcr, u8 addr, u16 val)
> @@ -459,6 +550,54 @@ static int rts524a_extra_init_hw(struct rtsx_pcr *pcr)
> return 0;
> }
>
> +static void rts5250_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
> +{
> + struct rtsx_cr_option *option = &(pcr->option);
> +
> + u32 interrupt = rtsx_pci_readl(pcr, RTSX_BIPR);
> + int card_exist = (interrupt & SD_EXIST) | (interrupt & MS_EXIST);
> + int aspm_L1_1, aspm_L1_2;
> +
> + aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
> + aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
> +
> + if (active) {
> + /* run, latency: 60us */
> + if (aspm_L1_1) {
> + u8 val = option->ltr_l1off_snooze_sspwrgate;
> +
> + if (rtsx_check_dev_flag(pcr,
> + LTR_L1SS_PWR_GATE_CHECK_CARD_EN)) {
> + if (card_exist)
> + val &= ~(1 << 7);
> + else
> + val |= (1 << 7);

These need defining.

> + }
> +
> + rtsx_set_l1off_sub(pcr, val);
> + } else {
> + rtsx_set_l1off_sub(pcr, 0);
> + }
> + } else {
> + /* l1off, latency: 300us */
> + if (aspm_L1_2) {
> + u8 val = option->ltr_l1off_sspwrgate;
> +
> + if (rtsx_check_dev_flag(pcr,
> + LTR_L1SS_PWR_GATE_CHECK_CARD_EN)) {
> + if (card_exist)
> + val &= ~(1 << 7);
> + else
> + val |= (1 << 7);
> + }
> +
> + rtsx_set_l1off_sub(pcr, val);
> + } else {
> + rtsx_set_l1off_sub(pcr, 0);
> + }
> + }
> +}
> +
> static const struct pcr_ops rts524a_pcr_ops = {
> .write_phy = rts524a_write_phy,
> .read_phy = rts524a_read_phy,
> @@ -473,11 +612,15 @@ static int rts524a_extra_init_hw(struct rtsx_pcr *pcr)
> .card_power_off = rtsx_base_card_power_off,
> .switch_output_voltage = rtsx_base_switch_output_voltage,
> .force_power_down = rtsx_base_force_power_down,
> + .set_l1off_cfg_sub_d0 = rts5250_set_l1off_cfg_sub_d0,
> };
>
> void rts524a_init_params(struct rtsx_pcr *pcr)
> {
> rts5249_init_params(pcr);
> + pcr->option.ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEFAULT;
> + pcr->option.ltr_l1off_snooze_sspwrgate =
> + LTR_L1OFF_SNOOZE_SSPWRGATE_5250_DEFAULT;
>
> pcr->reg_pm_ctrl3 = RTS524A_PM_CTRL3;
> pcr->ops = &rts524a_pcr_ops;
> @@ -564,6 +707,52 @@ static int rts525a_extra_init_hw(struct rtsx_pcr *pcr)
> return 0;
> }
>
> +static void rts5249_enable_aspm(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &pcr->option;
> +
> + if (pcr->aspm_enabled)
> + return;
> +
> + if (option->dev_aspm_mode == DEV_ASPM_DISABLE) {
> + pcr->aspm_enabled = true;
> + return;
> + }

'\n' here.

> + if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
> + rtsx_pci_update_cfg_byte(pcr,
> + pcr->pcie_cap + PCI_EXP_LNKCTL,
> + 0xFC, pcr->aspm_en);
> + } else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
> + u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
> +
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, 0);
> + }
> + pcr->aspm_enabled = true;

Place this above the:

if (option->dev_aspm_mode == DEV_ASPM_DISABLE)

.. line. Then you can remove the duplicate.
> +}
> +
> +static void rts5249_disable_aspm(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &pcr->option;
> +
> + if (!pcr->aspm_enabled)
> + return;

'\n' here.

> + if (option->dev_aspm_mode == DEV_ASPM_DISABLE) {
> + pcr->aspm_enabled = false;
> + return;
> + }
> + if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
> + rtsx_pci_update_cfg_byte(pcr,
> + pcr->pcie_cap + PCI_EXP_LNKCTL,
> + 0xFC, 0);
> + } else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
> + u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0;
> +
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL,
> + mask, FORCE_ASPM_CTL0);
> + }
> + pcr->aspm_enabled = false;

Place this above the:

if (option->dev_aspm_mode == DEV_ASPM_DISABLE)
.. line. Then you can remove the duplicate.

OR, better still. Since most of this code is the same as the function
above, please amalgamate them and figure a way to get them to share
code. Whether that's by using a function argument or something else.

Since there are only 2 pieces of information that differ, I would
create a child function which takes 3 arguments (pcr and the
differences between the functions), which both enable_* and disable_*
call.
> +}
> +
> static const struct pcr_ops rts525a_pcr_ops = {
> .fetch_vendor_settings = rtsx_base_fetch_vendor_settings,
> .extra_init_hw = rts525a_extra_init_hw,
> @@ -576,11 +765,17 @@ static int rts525a_extra_init_hw(struct rtsx_pcr *pcr)
> .card_power_off = rtsx_base_card_power_off,
> .switch_output_voltage = rts525a_switch_output_voltage,
> .force_power_down = rtsx_base_force_power_down,
> + .set_l1off_cfg_sub_d0 = rts5250_set_l1off_cfg_sub_d0,
> + .enable_aspm = rts5249_enable_aspm,
> + .disable_aspm = rts5249_disable_aspm,
> };
>
> void rts525a_init_params(struct rtsx_pcr *pcr)
> {
> rts5249_init_params(pcr);
> + pcr->option.ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEFAULT;
> + pcr->option.ltr_l1off_snooze_sspwrgate =
> + LTR_L1OFF_SNOOZE_SSPWRGATE_5250_DEFAULT;
>
> pcr->reg_pm_ctrl3 = RTS524A_PM_CTRL3;
> pcr->ops = &rts525a_pcr_ops;
> diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
> index a0ac89d..2ff398d 100644
> --- a/drivers/mfd/rtsx_pcr.c
> +++ b/drivers/mfd/rtsx_pcr.c
> @@ -79,6 +79,142 @@ static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
> 0xFC, 0);
> }
>
> +int rtsx_comm_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
> +{
> + rtsx_pci_write_register(pcr, MSGTXDATA0, 0xFF, (u8) (latency & 0xFF));
> + rtsx_pci_write_register(pcr, MSGTXDATA1,
> + 0xFF, (u8)((latency >> 8) & 0xFF));

Define these.

> + rtsx_pci_write_register(pcr, MSGTXDATA2,
> + 0xFF, (u8)((latency >> 16) & 0xFF));
> + rtsx_pci_write_register(pcr, MSGTXDATA3,
> + 0xFF, (u8)((latency >> 24) & 0xFF));
> + rtsx_pci_write_register(pcr, LTR_CTL, 0xC0, 0xC0);
> +
> + return 0;
> +}
> +
> +int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency)
> +{
> + if (pcr->ops->set_ltr_latency)
> + return pcr->ops->set_ltr_latency(pcr, latency);
> + else
> + return rtsx_comm_set_ltr_latency(pcr, latency);
> +
> + return 0;

This code is unreachable.

> +}
> +
> +static void rtsx_comm_disable_aspm(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &pcr->option;
> +
> + if (!pcr->aspm_enabled)
> + return;

'\n' here.

> + if (option->dev_aspm_mode == DEV_ASPM_DISABLE) {
> + pcr->aspm_enabled = false;
> + return;
> + }

'\n' here.

> + if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
> + rtsx_pci_disable_aspm(pcr);
> + } else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
> + u8 mask = FORCE_ASPM_VAL_MASK;
> +
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, 0);
> + }

'\n' here.

> + msleep(20);
> + pcr->aspm_enabled = false;
> +}
> +
> +static void rtsx_disable_aspm(struct rtsx_pcr *pcr)
> +{
> + if (pcr->ops->disable_aspm)
> + pcr->ops->disable_aspm(pcr);
> + else
> + rtsx_comm_disable_aspm(pcr);
> +}
> +
> +int rtsx_set_l1off_sub(struct rtsx_pcr *pcr, u8 val)
> +{
> + rtsx_pci_write_register(pcr, L1SUB_CONFIG3, 0xFF, val);
> +
> + return 0;
> +}
> +
> +static void rtsx_comm_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
> +{
> + struct rtsx_cr_option *option = &(pcr->option);
> + u32 interrupt = rtsx_pci_readl(pcr, RTSX_BIPR);
> + int card_exist = (interrupt & SD_EXIST) | (interrupt & MS_EXIST);
> + int aspm_L1_1, aspm_L1_2;
> +
> + aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
> + aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
> +
> + if (active) {
> + /* run, latency: 60us */
> + if (aspm_L1_1) {
> + u8 val = option->ltr_l1off_snooze_sspwrgate;
> +
> + if (rtsx_check_dev_flag(pcr,
> + LTR_L1SS_PWR_GATE_CHECK_CARD_EN)) {
> + if (card_exist)
> + val &= ~(1 << 4);
> + else
> + val |= (1 << 4);

Define these.

> + }
> +
> + rtsx_set_l1off_sub(pcr, val);
> + } else {
> + rtsx_set_l1off_sub(pcr, 0);
> + }
> + } else {
> + /* l1off, latency: 300us */
> + if (aspm_L1_2) {
> + u8 val = option->ltr_l1off_sspwrgate;
> +
> + if (rtsx_check_dev_flag(pcr,
> + LTR_L1SS_PWR_GATE_CHECK_CARD_EN)) {
> + if (card_exist)
> + val &= ~(1 << 4);
> + else
> + val |= (1 << 4);
> + }
> +
> + rtsx_set_l1off_sub(pcr, val);
> + } else {
> + rtsx_set_l1off_sub(pcr, 0);
> + }
> + }
> +}

Again, there is a lot of duplication here. Any way these can be
amalgamated?

> +void rtsx_set_l1off_sub_cfg_d0(struct rtsx_pcr *pcr, int active)
> +{
> + if (pcr->ops->set_l1off_cfg_sub_d0)
> + pcr->ops->set_l1off_cfg_sub_d0(pcr, active);
> + else
> + rtsx_comm_set_l1off_cfg_sub_d0(pcr, active);
> +}
> +
> +static void rtsx_comm_pm_full_on(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &pcr->option;
> +
> + rtsx_disable_aspm(pcr);
> +
> + if (option->ltr_enabled)
> + rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
> +
> + if (rtsx_check_dev_flag(pcr, LTR_L1SS_PWR_GATE_EN))
> + rtsx_set_l1off_sub_cfg_d0(pcr, 1);
> +}
> +
> +void rtsx_pm_full_on(struct rtsx_pcr *pcr)
> +{
> + if (pcr->ops->full_on)
> + pcr->ops->full_on(pcr);
> + else
> + rtsx_comm_pm_full_on(pcr);
> +}
> +
> void rtsx_pci_start_run(struct rtsx_pcr *pcr)
> {
> /* If pci device removed, don't queue idle work any more */
> @@ -89,9 +225,7 @@ void rtsx_pci_start_run(struct rtsx_pcr *pcr)
> pcr->state = PDEV_STAT_RUN;
> if (pcr->ops->enable_auto_blink)
> pcr->ops->enable_auto_blink(pcr);
> -
> - if (pcr->aspm_en)
> - rtsx_pci_disable_aspm(pcr);
> + rtsx_pm_full_on(pcr);
> }
>
> mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
> @@ -958,6 +1092,63 @@ static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr)
> return 0;
> }
>
> +static void rtsx_comm_enable_aspm(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &pcr->option;
> +
> + if (pcr->aspm_enabled)
> + return;

'\n' here.

> + if (option->dev_aspm_mode == DEV_ASPM_DISABLE) {
> + pcr->aspm_enabled = true;
> + return;
> + }
> +
> + if (option->dev_aspm_mode == DEV_ASPM_DYNAMIC) {
> + rtsx_pci_enable_aspm(pcr);
> + } else if (option->dev_aspm_mode == DEV_ASPM_BACKDOOR) {
> + u8 mask = FORCE_ASPM_VAL_MASK;
> + u8 val = pcr->aspm_en;
> +
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
> + }
> + pcr->aspm_enabled = true;

Same comments as the code above that looks the same.

> +}
> +
> +static void rtsx_enable_aspm(struct rtsx_pcr *pcr)
> +{
> + if (pcr->ops->enable_aspm)
> + pcr->ops->enable_aspm(pcr);
> + else
> + rtsx_comm_enable_aspm(pcr);
> +}
> +
> +static void rtsx_comm_pm_power_saving(struct rtsx_pcr *pcr)
> +{
> + struct rtsx_cr_option *option = &pcr->option;
> +
> + if (option->ltr_enabled) {
> + u32 latency = option->ltr_l1off_latency;
> +
> + if (rtsx_check_dev_flag(pcr, L1_SNOOZE_TEST_EN))
> + mdelay(option->l1_snooze_delay);
> +
> + rtsx_set_ltr_latency(pcr, latency);
> + }
> +
> + if (rtsx_check_dev_flag(pcr, LTR_L1SS_PWR_GATE_EN))
> + rtsx_set_l1off_sub_cfg_d0(pcr, 0);
> +
> + rtsx_enable_aspm(pcr);
> +}
> +
> +void rtsx_pm_power_saving(struct rtsx_pcr *pcr)
> +{
> + if (pcr->ops->power_saving)
> + pcr->ops->power_saving(pcr);
> + else
> + rtsx_comm_pm_power_saving(pcr);
> +}
> +
> static void rtsx_pci_idle_work(struct work_struct *work)
> {
> struct delayed_work *dwork = to_delayed_work(work);
> @@ -974,8 +1165,7 @@ static void rtsx_pci_idle_work(struct work_struct *work)
> if (pcr->ops->turn_off_led)
> pcr->ops->turn_off_led(pcr);
>
> - if (pcr->aspm_en)
> - rtsx_pci_enable_aspm(pcr);
> + rtsx_pm_power_saving(pcr);
>
> mutex_unlock(&pcr->pcr_mutex);
> }
> @@ -1063,6 +1253,11 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
> if (err < 0)
> return err;
>
> + if (CHK_PCI_PID(pcr, 0x5250) ||
> + CHK_PCI_PID(pcr, 0x524A) ||
> + CHK_PCI_PID(pcr, 0x525A))
> + rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, 1, 1);

This should probably be a switch() statement with fall-through.

> /* Enable clk_request_n to enable clock power management */
> rtsx_pci_write_config_byte(pcr, pcr->pcie_cap + PCI_EXP_LNKCTL + 1, 1);
> /* Enter L1 when host tx idle */
> diff --git a/drivers/mfd/rtsx_pcr.h b/drivers/mfd/rtsx_pcr.h
> index 931d1ae..d3baaec 100644
> --- a/drivers/mfd/rtsx_pcr.h
> +++ b/drivers/mfd/rtsx_pcr.h
> @@ -32,6 +32,15 @@
> #define RTS524A_PME_FORCE_CTL 0xFF78
> #define RTS524A_PM_CTRL3 0xFF7E
>
> +#define LTR_ACTIVE_LATENCY_DEFAULT 0x883C
> +#define LTR_IDLE_LATENCY_DEFAULT 0x892C
> +#define LTR_L1OFF_LATENCY_DEFAULT 0x9003
> +#define LTR_L1OFF_SSPWRGATE_5249_DEFAULT 0xAF
> +#define LTR_L1OFF_SSPWRGATE_5250_DEFAULT 0xFF
> +#define LTR_L1OFF_SNOOZE_SSPWRGATE_5249_DEFAULT 0xAC
> +#define LTR_L1OFF_SNOOZE_SSPWRGATE_5250_DEFAULT 0xF8
> +
> +
> int __rtsx_pci_write_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 val);
> int __rtsx_pci_read_phy_register(struct rtsx_pcr *pcr, u8 addr, u16 *val);
>
> @@ -85,5 +94,7 @@ static inline u8 map_sd_drive(int idx)
>
> /* generic operations */
> int rtsx_gops_pm_reset(struct rtsx_pcr *pcr);
> +int rtsx_set_ltr_latency(struct rtsx_pcr *pcr, u32 latency);
> +int rtsx_set_l1off_sub(struct rtsx_pcr *pcr, u8 val);
>
> #endif
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 116816f..62b50e4 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -621,6 +621,9 @@
>
> #define AUTOLOAD_CFG_BASE 0xFF00
> #define PETXCFG 0xFF03
> +#define FORCE_CLKREQ_DELINK_MASK BIT(7)
> +#define FORCE_CLKREQ_LOW 0x80
> +#define FORCE_CLKREQ_HIGH 0x00
>
> #define PM_CTRL1 0xFF44
> #define CD_RESUME_EN_MASK 0xF0
> @@ -844,6 +847,9 @@
> #define PHY_DIG1E_RX_EN_KEEP 0x0001
> #define PHY_DUM_REG 0x1F
>
> +#define PCR_ASPM_SETTING_REG1 0x160
> +#define PCR_ASPM_SETTING_REG2 0x168
> +
> #define PCR_SETTING_REG1 0x724
> #define PCR_SETTING_REG2 0x814
> #define PCR_SETTING_REG3 0x747
> @@ -876,14 +882,65 @@ struct pcr_ops {
> int (*conv_clk_and_div_n)(int clk, int dir);
> void (*fetch_vendor_settings)(struct rtsx_pcr *pcr);
> void (*force_power_down)(struct rtsx_pcr *pcr, u8 pm_state);
> +
> + void (*enable_aspm)(struct rtsx_pcr *pcr);
> + void (*disable_aspm)(struct rtsx_pcr *pcr);
> + int (*set_ltr_latency)(struct rtsx_pcr *pcr, u32 latency);
> + int (*set_l1off_sub)(struct rtsx_pcr *pcr, u8 val);
> + void (*set_l1off_cfg_sub_d0)(struct rtsx_pcr *pcr, int active);
> + void (*full_on)(struct rtsx_pcr *pcr);
> + void (*power_saving)(struct rtsx_pcr *pcr);
> };
>
> enum PDEV_STAT {PDEV_STAT_IDLE, PDEV_STAT_RUN};
>
> +#define ASPM_L1_1_EN_MASK BIT(3)
> +#define ASPM_L1_2_EN_MASK BIT(2)
> +#define PM_L1_1_EN_MASK BIT(1)
> +#define PM_L1_2_EN_MASK BIT(0)
> +
> +#define ASPM_L1_1_EN BIT(0)
> +#define ASPM_L1_2_EN BIT(1)
> +#define PM_L1_1_EN BIT(2)
> +#define PM_L1_2_EN BIT(3)
> +#define LTR_L1SS_PWR_GATE_EN BIT(4)
> +#define L1_SNOOZE_TEST_EN BIT(5)
> +#define LTR_L1SS_PWR_GATE_CHECK_CARD_EN BIT(6)
> +
> +enum dev_aspm_mode {
> + DEV_ASPM_DISABLE = 0,
> + DEV_ASPM_DYNAMIC,
> + DEV_ASPM_BACKDOOR,
> + DEV_ASPM_STATIC,
> +};
> +
> +struct rtsx_cr_option {
> + u32 dev_flags;
> + bool force_clkreq_0;
> + bool ltr_en;
> + bool ltr_enabled;
> + bool ltr_active;
> + u32 ltr_active_latency;
> + u32 ltr_idle_latency;
> + u32 ltr_l1off_latency;
> + enum dev_aspm_mode dev_aspm_mode;
> + u32 l1_snooze_delay;
> + u8 ltr_l1off_sspwrgate;
> + u8 ltr_l1off_snooze_sspwrgate;
> +};

This still needs a kerneldoc header.

> +#define rtsx_set_dev_flag(cr, flag) \
> + ((cr)->option.dev_flags |= (flag))
> +#define rtsx_clear_dev_flag(cr, flag) \
> + ((cr)->option.dev_flags &= ~(flag))
> +#define rtsx_check_dev_flag(cr, flag) \
> + ((cr)->option.dev_flags & (flag))
> +
> struct rtsx_pcr {
> struct pci_dev *pci;
> unsigned int id;
> int pcie_cap;
> + struct rtsx_cr_option option;
>
> /* pci resources */
> unsigned long addr;
> @@ -940,6 +997,7 @@ struct rtsx_pcr {
> u8 card_drive_sel;
> #define ASPM_L1_EN 0x02
> u8 aspm_en;
> + bool aspm_enabled;
>
> #define PCR_MS_PMOS (1 << 0)
> #define PCR_REVERSE_SOCKET (1 << 1)
> @@ -964,6 +1022,8 @@ struct rtsx_pcr {
> u8 dma_error_count;
> };
>
> +#define PID_524A 0x524A
> +
> #define CHK_PCI_PID(pcr, pid) ((pcr)->pci->device == (pid))
> #define PCI_VID(pcr) ((pcr)->pci->vendor)
> #define PCI_PID(pcr) ((pcr)->pci->device)

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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