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Date: Sun, 18 Jan 2015 12:28:21 +0000
From: Lee Jones <lee.jones@...aro.org>
To: micky_ching@...lsil.com.cn
Cc: sameo@...ux.intel.com, devel@...uxdriverproject.org,
linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
rogerable@...ltek.com, wei_wang@...lsil.com.cn
Subject: Re: [PATCH 07/10] mfd: rtsx: remove LCTLR defination
On Thu, 15 Jan 2015, micky_ching@...lsil.com.cn wrote:
> From: Micky Ching <micky_ching@...lsil.com.cn>
>
> To enable/disable ASPM we should find LINK CONTROL register
> in PCI config space. All old chip use 0x80 address, but new
> chip may use another address, so we using pci_find_capability()
> to get LINK CONTROL address.
>
> rtsx_gops.c was removed, we consider to put some common operations
> to this file, but the actual thing is, only a group of chips
> are in common ops1, and another group of chips in common ops2,
> it is hard to decide put which ops into generic ops file.
>
> Signed-off-by: Micky Ching <micky_ching@...lsil.com.cn>
> ---
> drivers/mfd/Makefile | 2 +-
> drivers/mfd/rts5227.c | 2 +-
> drivers/mfd/rts5249.c | 3 +--
> drivers/mfd/rtsx_gops.c | 37 -------------------------------------
> drivers/mfd/rtsx_pcr.c | 25 ++++++++++++++++++++-----
> include/linux/mfd/rtsx_pci.h | 9 ---------
> 6 files changed, 23 insertions(+), 55 deletions(-)
> delete mode 100644 drivers/mfd/rtsx_gops.c
>
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 53467e2..2cd7e74 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-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
>
> -rtsx_pci-objs := rtsx_pcr.o rtsx_gops.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o
> +rtsx_pci-objs := rtsx_pcr.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o
> obj-$(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 1f387d4..0c02831 100644
> --- a/drivers/mfd/rts5227.c
> +++ b/drivers/mfd/rts5227.c
> @@ -130,7 +130,7 @@ static int rts5227_optimize_phy(struct rtsx_pcr *pcr)
> {
> int err;
>
> - err = rtsx_gops_pm_reset(pcr);
> + err = rtsx_pci_write_register(pcr, PM_CTRL3, D3_DELINK_MODE_EN, 0x00);
> if (err < 0)
> return err;
>
> diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
> index 00208d1..5eb9819 100644
> --- a/drivers/mfd/rts5249.c
> +++ b/drivers/mfd/rts5249.c
> @@ -119,7 +119,6 @@ static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
> rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0xB0, 0xB0);
> else
> rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0xB0, 0x80);
> - rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PM_CTRL3, 0x10, 0x00);
What's this doing? Why is it not required anymore?
> return rtsx_pci_send_cmd(pcr, 100);
> }
> @@ -128,7 +127,7 @@ static int rts5249_optimize_phy(struct rtsx_pcr *pcr)
> {
> int err;
>
> - err = rtsx_gops_pm_reset(pcr);
> + err = rtsx_pci_write_register(pcr, PM_CTRL3, D3_DELINK_MODE_EN, 0x00);
> if (err < 0)
> return err;
>
> diff --git a/drivers/mfd/rtsx_gops.c b/drivers/mfd/rtsx_gops.c
> deleted file mode 100644
> index b1a98c6..0000000
> --- a/drivers/mfd/rtsx_gops.c
> +++ /dev/null
> @@ -1,37 +0,0 @@
> -/* 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@...lsil.com.cn>
> - */
> -
> -#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.c b/drivers/mfd/rtsx_pcr.c
> index 92f5a41..3065edc 100644
> --- a/drivers/mfd/rtsx_pcr.c
> +++ b/drivers/mfd/rtsx_pcr.c
> @@ -63,6 +63,20 @@ static const struct pci_device_id rtsx_pci_ids[] = {
>
> MODULE_DEVICE_TABLE(pci, rtsx_pci_ids);
>
> +static inline void rtsx_pci_enable_aspm(struct rtsx_pcr *pcr)
> +{
> + int exp = pci_find_capability(pcr->pci, PCI_CAP_ID_EXP);
> +
> + rtsx_pci_update_cfg_byte(pcr, exp + PCI_EXP_LNKCTL, 0xFC, pcr->aspm_en);
> +}
> +
> +static inline void rtsx_pci_disable_aspm(struct rtsx_pcr *pcr)
> +{
> + int exp = pci_find_capability(pcr->pci, PCI_CAP_ID_EXP);
> +
> + rtsx_pci_update_cfg_byte(pcr, exp + PCI_EXP_LNKCTL, 0xFC, 0);
> +}
> +
> void rtsx_pci_start_run(struct rtsx_pcr *pcr)
> {
> /* If pci device removed, don't queue idle work any more */
> @@ -75,7 +89,8 @@ void rtsx_pci_start_run(struct rtsx_pcr *pcr)
> pcr->ops->enable_auto_blink(pcr);
>
> if (pcr->aspm_en)
> - rtsx_pci_write_config_byte(pcr, LCTLR, 0);
> + rtsx_pci_disable_aspm(pcr);
> +
?
> }
>
> mod_delayed_work(system_wq, &pcr->idle_work, msecs_to_jiffies(200));
> @@ -954,7 +969,7 @@ static void rtsx_pci_idle_work(struct work_struct *work)
> pcr->ops->turn_off_led(pcr);
>
> if (pcr->aspm_en)
> - rtsx_pci_write_config_byte(pcr, LCTLR, pcr->aspm_en);
> + rtsx_pci_enable_aspm(pcr);
>
> mutex_unlock(&pcr->pcr_mutex);
> }
> @@ -979,6 +994,7 @@ static void rtsx_pci_power_off(struct rtsx_pcr *pcr, u8 pm_state)
> static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
> {
> int err;
> + int exp = pci_find_capability(pcr->pci, PCI_CAP_ID_EXP);
>
> rtsx_pci_writel(pcr, RTSX_HCBAR, pcr->host_cmds_addr);
>
> @@ -992,6 +1008,7 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
> /* Wait SSC power stable */
> udelay(200);
>
> + rtsx_pci_disable_aspm(pcr);
> if (pcr->ops->optimize_phy) {
> err = pcr->ops->optimize_phy(pcr);
> if (err < 0)
> @@ -1040,10 +1057,8 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
> if (err < 0)
> return err;
>
> - rtsx_pci_write_config_byte(pcr, LCTLR, 0);
> -
> /* Enable clk_request_n to enable clock power management */
> - rtsx_pci_write_config_byte(pcr, 0x81, 1);
> + rtsx_pci_write_config_byte(pcr, exp + PCI_EXP_LNKCTL + 1, 1);
> /* Enter L1 when host tx idle */
> rtsx_pci_write_config_byte(pcr, 0x70F, 0x5B);
>
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 80baa10..f7cebdb 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -662,15 +662,6 @@
> #define PHY_FLD4 0x1E
> #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
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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