Re: [PATCH v2] mfd: rtsx: fix PM suspend for 5227 & 5249

From: Lee Jones
Date: Wed Oct 22 2014 - 05:25:41 EST

On Fri, 10 Oct 2014, micky_ching@xxxxxxxxxxxxxx wrote:

> From: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
>
> Fix rts5227&5249 failed send buffer cmd after suspend,
> PM_CTRL3 should reset before send any buffer cmd after suspend.
> Otherwise, buffer cmd will failed, this will lead resume fail.
>
> Signed-off-by: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
> ---
> drivers/mfd/Makefile | 2 +-
> drivers/mfd/rts5227.c | 6 ++++++
> drivers/mfd/rts5249.c | 4 ++++
> drivers/mfd/rtsx_gops.c | 37 +++++++++++++++++++++++++++++++++++++
> drivers/mfd/rtsx_pcr.h | 3 +++
> include/linux/mfd/rtsx_pci.h | 28 ++++++++++++++++++++++++++++
> 6 files changed, 79 insertions(+), 1 deletion(-)
> create mode 100644 drivers/mfd/rtsx_gops.c

Applied, thanks.

> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index f001487..7f45c06 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -13,7 +13,7 @@ obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o
> obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
> obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
>
> -rtsx_pci-objs := rtsx_pcr.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o
> +rtsx_pci-objs := rtsx_pcr.o rtsx_gops.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o
> obj-$(CONFIG_MFD_RTSX_PCI) += rtsx_pci.o
> obj-$(CONFIG_MFD_RTSX_USB) += rtsx_usb.o
>
> diff --git a/drivers/mfd/rts5227.c b/drivers/mfd/rts5227.c
> index 9c8eec8..3240740 100644
> --- a/drivers/mfd/rts5227.c
> +++ b/drivers/mfd/rts5227.c
> @@ -130,6 +130,12 @@ static int rts5227_extra_init_hw(struct rtsx_pcr *pcr)
>
> static int rts5227_optimize_phy(struct rtsx_pcr *pcr)
> {
> + int err;
> +
> + err = rtsx_gops_pm_reset(pcr);
> + if (err < 0)
> + return err;
> +
> /* Optimize RX sensitivity */
> return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
> }
> diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
> index 573de7b..cf425cc 100644
> --- a/drivers/mfd/rts5249.c
> +++ b/drivers/mfd/rts5249.c
> @@ -130,6 +130,10 @@ static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
> {
> int err;
>
> + err = rtsx_gops_pm_reset(pcr);
> + if (err < 0)
> + return err;
> +
> err = rtsx_pci_write_phy_register(pcr, PHY_REG_REV,
> PHY_REG_REV_RESV | PHY_REG_REV_RXIDLE_LATCHED |
> PHY_REG_REV_P1_EN | PHY_REG_REV_RXIDLE_EN |
> diff --git a/drivers/mfd/rtsx_gops.c b/drivers/mfd/rtsx_gops.c
> new file mode 100644
> index 0000000..b1a98c6
> --- /dev/null
> +++ b/drivers/mfd/rtsx_gops.c
> @@ -0,0 +1,37 @@
> +/* Driver for Realtek PCI-Express card reader
> + *
> + * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2, or (at your option) any
> + * later version.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, see <http://www.gnu.org/licenses/>.
> + *
> + * Author:
> + * Micky Ching <micky_ching@xxxxxxxxxxxxxx>
> + */
> +
> +#include <linux/mfd/rtsx_pci.h>
> +#include "rtsx_pcr.h"
> +
> +int rtsx_gops_pm_reset(struct rtsx_pcr *pcr)
> +{
> + int err;
> +
> + /* init aspm */
> + rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0xFF, 0x00);
> + err = rtsx_pci_update_cfg_byte(pcr, LCTLR, ~LCTLR_ASPM_CTL_MASK, 0x00);
> + if (err < 0)
> + return err;
> +
> + /* reset PM_CTRL3 before send buffer cmd */
> + return rtsx_pci_write_register(pcr, PM_CTRL3, D3_DELINK_MODE_EN, 0x00);
> +}
> diff --git a/drivers/mfd/rtsx_pcr.h b/drivers/mfd/rtsx_pcr.h
> index 07e4c2e..fe2bbb6 100644
> --- a/drivers/mfd/rtsx_pcr.h
> +++ b/drivers/mfd/rtsx_pcr.h
> @@ -72,4 +72,7 @@ do { \
> pcr->ms_pull_ctl_disable_tbl = __device##_ms_pull_ctl_disable_tbl; \
> } while (0)
>
> +/* generic operations */
> +int rtsx_gops_pm_reset(struct rtsx_pcr *pcr);
> +
> #endif
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 74346d5..1604dda 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -707,6 +707,14 @@
> #define PM_CTRL1 0xFF44
> #define PM_CTRL2 0xFF45
> #define PM_CTRL3 0xFF46
> +#define SDIO_SEND_PME_EN 0x80
> +#define FORCE_RC_MODE_ON 0x40
> +#define FORCE_RX50_LINK_ON 0x20
> +#define D3_DELINK_MODE_EN 0x10
> +#define USE_PESRTB_CTL_DELINK 0x08
> +#define DELAY_PIN_WAKE 0x04
> +#define RESET_PIN_WAKE 0x02
> +#define PM_WAKE_EN 0x01
> #define PM_CTRL4 0xFF47
>
> /* Memory mapping */
> @@ -752,6 +760,14 @@
> #define PHY_DUM_REG 0x1F
>
> #define LCTLR 0x80
> +#define LCTLR_EXT_SYNC 0x80
> +#define LCTLR_COMMON_CLOCK_CFG 0x40
> +#define LCTLR_RETRAIN_LINK 0x20
> +#define LCTLR_LINK_DISABLE 0x10
> +#define LCTLR_RCB 0x08
> +#define LCTLR_RESERVED 0x04
> +#define LCTLR_ASPM_CTL_MASK 0x03
> +
> #define PCR_SETTING_REG1 0x724
> #define PCR_SETTING_REG2 0x814
> #define PCR_SETTING_REG3 0x747
> @@ -967,4 +983,16 @@ static inline u8 *rtsx_pci_get_cmd_data(struct rtsx_pcr *pcr)
> return (u8 *)(pcr->host_cmds_ptr);
> }
>
> +static inline int rtsx_pci_update_cfg_byte(struct rtsx_pcr *pcr, int addr,
> + u8 mask, u8 append)
> +{
> + int err;
> + u8 val;
> +
> + err = pci_read_config_byte(pcr->pci, addr, &val);
> + if (err < 0)
> + return err;
> + return pci_write_config_byte(pcr->pci, addr, (val & mask) | append);
> +}
> +
> #endif

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/