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Date: Tue, 8 Jun 2021 11:43:03 +0800
From: Chris Chiu <chris.chiu@...onical.com>
To: Ricky WU <ricky_wu@...ltek.com>
Cc: arnd@...db.de, Greg KH <gregkh@...uxfoundation.org>,
Bjorn Helgaas <bhelgaas@...gle.com>, ulf.hansson@...aro.org,
rui_feng@...lsil.com.cn, vaibhavgupta40@...il.com,
yang.lee@...ux.alibaba.com,
Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] misc: rtsx: separate aspm mode into MODE_REG and MODE_CFG
On Mon, Jun 7, 2021 at 6:16 PM <ricky_wu@...ltek.com> wrote:
>
> From: Ricky Wu <ricky_wu@...ltek.com>
>
> aspm (Active State Power Management)
> rtsx_comm_set_aspm: this function is for driver to make sure
> not enter power saving when processing of init and card_detcct
> ASPM_MODE_CFG: 8411 5209 5227 5229 5249 5250
> Change back to use original way to control aspm
> ASPM_MODE_REG: 5227A 524A 5250A 5260 5261 5228
> Keep the new way to control aspm
>
> Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
> ---
Reported-by: Chris Chiu <chris.chiu@...onical.com>
> V2:
> change to use an enum for ASPM_MODE
> describe more description
> ---
> drivers/misc/cardreader/rtl8411.c | 1 +
> drivers/misc/cardreader/rts5209.c | 1 +
> drivers/misc/cardreader/rts5227.c | 2 ++
> drivers/misc/cardreader/rts5228.c | 1 +
> drivers/misc/cardreader/rts5229.c | 1 +
> drivers/misc/cardreader/rts5249.c | 3 ++
> drivers/misc/cardreader/rts5260.c | 1 +
> drivers/misc/cardreader/rts5261.c | 1 +
> drivers/misc/cardreader/rtsx_pcr.c | 44 +++++++++++++++++++++---------
> include/linux/rtsx_pci.h | 2 ++
> 10 files changed, 44 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/misc/cardreader/rtl8411.c b/drivers/misc/cardreader/rtl8411.c
> index a07674ed0596..4c5621b17a6f 100644
> --- a/drivers/misc/cardreader/rtl8411.c
> +++ b/drivers/misc/cardreader/rtl8411.c
> @@ -468,6 +468,7 @@ static void rtl8411_init_common_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_CFG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(23, 7, 14);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(4, 3, 10);
> pcr->ic_version = rtl8411_get_ic_version(pcr);
> diff --git a/drivers/misc/cardreader/rts5209.c b/drivers/misc/cardreader/rts5209.c
> index 39a6a7ecc32e..29f5414072bf 100644
> --- a/drivers/misc/cardreader/rts5209.c
> +++ b/drivers/misc/cardreader/rts5209.c
> @@ -255,6 +255,7 @@ void rts5209_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_CFG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
>
> diff --git a/drivers/misc/cardreader/rts5227.c b/drivers/misc/cardreader/rts5227.c
> index 8200af22b529..4bcfbc9afbac 100644
> --- a/drivers/misc/cardreader/rts5227.c
> +++ b/drivers/misc/cardreader/rts5227.c
> @@ -358,6 +358,7 @@ void rts5227_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_CFG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 7, 7);
>
> @@ -483,6 +484,7 @@ void rts522a_init_params(struct rtsx_pcr *pcr)
>
> rts5227_init_params(pcr);
> pcr->ops = &rts522a_pcr_ops;
> + pcr->aspm_mode = ASPM_MODE_REG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(20, 20, 11);
> pcr->reg_pm_ctrl3 = RTS522A_PM_CTRL3;
>
> diff --git a/drivers/misc/cardreader/rts5228.c b/drivers/misc/cardreader/rts5228.c
> index 781a86def59a..ffc128278613 100644
> --- a/drivers/misc/cardreader/rts5228.c
> +++ b/drivers/misc/cardreader/rts5228.c
> @@ -718,6 +718,7 @@ void rts5228_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_REG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(28, 27, 11);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
>
> diff --git a/drivers/misc/cardreader/rts5229.c b/drivers/misc/cardreader/rts5229.c
> index 89e6f124ca5c..c748eaf1ec1f 100644
> --- a/drivers/misc/cardreader/rts5229.c
> +++ b/drivers/misc/cardreader/rts5229.c
> @@ -246,6 +246,7 @@ void rts5229_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_CFG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
>
> diff --git a/drivers/misc/cardreader/rts5249.c b/drivers/misc/cardreader/rts5249.c
> index b2676e7f5027..53f3a1f45c4a 100644
> --- a/drivers/misc/cardreader/rts5249.c
> +++ b/drivers/misc/cardreader/rts5249.c
> @@ -566,6 +566,7 @@ void rts5249_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_CFG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(1, 29, 16);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
>
> @@ -729,6 +730,7 @@ static const struct pcr_ops rts524a_pcr_ops = {
> void rts524a_init_params(struct rtsx_pcr *pcr)
> {
> rts5249_init_params(pcr);
> + pcr->aspm_mode = ASPM_MODE_REG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 29, 11);
> pcr->option.ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEF;
> pcr->option.ltr_l1off_snooze_sspwrgate =
> @@ -845,6 +847,7 @@ static const struct pcr_ops rts525a_pcr_ops = {
> void rts525a_init_params(struct rtsx_pcr *pcr)
> {
> rts5249_init_params(pcr);
> + pcr->aspm_mode = ASPM_MODE_REG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(25, 29, 11);
> pcr->option.ltr_l1off_sspwrgate = LTR_L1OFF_SSPWRGATE_5250_DEF;
> pcr->option.ltr_l1off_snooze_sspwrgate =
> diff --git a/drivers/misc/cardreader/rts5260.c b/drivers/misc/cardreader/rts5260.c
> index 080a7d67a8e1..9b42b20a3e5a 100644
> --- a/drivers/misc/cardreader/rts5260.c
> +++ b/drivers/misc/cardreader/rts5260.c
> @@ -628,6 +628,7 @@ void rts5260_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
> pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_REG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 29, 11);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
>
> diff --git a/drivers/misc/cardreader/rts5261.c b/drivers/misc/cardreader/rts5261.c
> index 6c64dade8e1a..1fd4e0e50730 100644
> --- a/drivers/misc/cardreader/rts5261.c
> +++ b/drivers/misc/cardreader/rts5261.c
> @@ -783,6 +783,7 @@ void rts5261_init_params(struct rtsx_pcr *pcr)
> pcr->sd30_drive_sel_1v8 = 0x00;
> pcr->sd30_drive_sel_3v3 = 0x00;
> pcr->aspm_en = ASPM_L1_EN;
> + pcr->aspm_mode = ASPM_MODE_REG;
> pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 11);
> pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
>
> diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c
> index 273311184669..baf83594a01d 100644
> --- a/drivers/misc/cardreader/rtsx_pcr.c
> +++ b/drivers/misc/cardreader/rtsx_pcr.c
> @@ -85,12 +85,18 @@ static void rtsx_comm_set_aspm(struct rtsx_pcr *pcr, bool enable)
> if (pcr->aspm_enabled == enable)
> return;
>
> - if (pcr->aspm_en & 0x02)
> - rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, FORCE_ASPM_CTL0 |
> - FORCE_ASPM_CTL1, enable ? 0 : FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1);
> - else
> - rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, FORCE_ASPM_CTL0 |
> - FORCE_ASPM_CTL1, FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1);
> + if (pcr->aspm_mode == ASPM_MODE_CFG) {
> + pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
> + PCI_EXP_LNKCTL_ASPMC,
> + enable ? pcr->aspm_en : 0);
> + } else if (pcr->aspm_mode == ASPM_MODE_REG) {
> + if (pcr->aspm_en & 0x02)
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, FORCE_ASPM_CTL0 |
> + FORCE_ASPM_CTL1, enable ? 0 : FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1);
> + else
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, FORCE_ASPM_CTL0 |
> + FORCE_ASPM_CTL1, FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1);
> + }
>
> if (!enable && (pcr->aspm_en & 0x02))
> mdelay(10);
> @@ -1394,7 +1400,8 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
> return err;
> }
>
> - rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0x30, 0x30);
> + if (pcr->aspm_mode == ASPM_MODE_REG)
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0x30, 0x30);
>
> /* No CD interrupt if probing driver with card inserted.
> * So we need to initialize pcr->card_exist here.
> @@ -1410,6 +1417,8 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
> static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
> {
> int err;
> + u16 cfg_val;
> + u8 val;
>
> spin_lock_init(&pcr->lock);
> mutex_init(&pcr->pcr_mutex);
> @@ -1477,6 +1486,21 @@ static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
> if (!pcr->slots)
> return -ENOMEM;
>
> + if (pcr->aspm_mode == ASPM_MODE_CFG) {
> + pcie_capability_read_word(pcr->pci, PCI_EXP_LNKCTL, &cfg_val);
> + if (cfg_val & PCI_EXP_LNKCTL_ASPM_L1)
> + pcr->aspm_enabled = true;
> + else
> + pcr->aspm_enabled = false;
> +
> + } else if (pcr->aspm_mode == ASPM_MODE_REG) {
> + rtsx_pci_read_register(pcr, ASPM_FORCE_CTL, &val);
> + if (val & FORCE_ASPM_CTL0 && val & FORCE_ASPM_CTL1)
> + pcr->aspm_enabled = false;
> + else
> + pcr->aspm_enabled = true;
> + }
> +
> if (pcr->ops->fetch_vendor_settings)
> pcr->ops->fetch_vendor_settings(pcr);
>
> @@ -1506,7 +1530,6 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
> struct pcr_handle *handle;
> u32 base, len;
> int ret, i, bar = 0;
> - u8 val;
>
> dev_dbg(&(pcidev->dev),
> ": Realtek PCI-E Card Reader found at %s [%04x:%04x] (rev %x)\n",
> @@ -1572,11 +1595,6 @@ static int rtsx_pci_probe(struct pci_dev *pcidev,
> pcr->host_cmds_addr = pcr->rtsx_resv_buf_addr;
> pcr->host_sg_tbl_ptr = pcr->rtsx_resv_buf + HOST_CMDS_BUF_LEN;
> pcr->host_sg_tbl_addr = pcr->rtsx_resv_buf_addr + HOST_CMDS_BUF_LEN;
> - rtsx_pci_read_register(pcr, ASPM_FORCE_CTL, &val);
> - if (val & FORCE_ASPM_CTL0 && val & FORCE_ASPM_CTL1)
> - pcr->aspm_enabled = false;
> - else
> - pcr->aspm_enabled = true;
> pcr->card_inserted = 0;
> pcr->card_removed = 0;
> INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect);
> diff --git a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h
> index 6f155f99aa16..4ab7bfc675f1 100644
> --- a/include/linux/rtsx_pci.h
> +++ b/include/linux/rtsx_pci.h
> @@ -1109,6 +1109,7 @@ struct pcr_ops {
> };
>
> enum PDEV_STAT {PDEV_STAT_IDLE, PDEV_STAT_RUN};
> +enum ASPM_MODE {ASPM_MODE_CFG, ASPM_MODE_REG};
>
> #define ASPM_L1_1_EN BIT(0)
> #define ASPM_L1_2_EN BIT(1)
> @@ -1234,6 +1235,7 @@ struct rtsx_pcr {
> u8 card_drive_sel;
> #define ASPM_L1_EN 0x02
> u8 aspm_en;
> + enum ASPM_MODE aspm_mode;
> bool aspm_enabled;
>
> #define PCR_MS_PMOS (1 << 0)
> --
> 2.17.1
>
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