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Date: Mon, 19 Jan 2015 08:06:38 +0000
From: Lee Jones <lee.jones@...aro.org>
To: 敬锐 <micky_ching@...lsil.com.cn>
Cc: "sameo@...ux.intel.com" <sameo@...ux.intel.com>,
"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"rogerable@...ltek.com" <rogerable@...ltek.com>,
王炜 <wei_wang@...lsil.com.cn>
Subject: Re: [PATCH 07/10] mfd: rtsx: remove LCTLR defination
On Mon, 19 Jan 2015, 敬锐 wrote:
>
> On 01/18/2015 08:28 PM, Lee Jones wrote:
> > 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?
> PM_CTRL3 have been set in rts5249_optimize_phy, this function
> rts5249_extra_init will be call for rts524A/rts525A, but their PM_CTRL3
> address is redefined to RTS524A_PM_CTRL3, using a different address.
> if we set PM_CTRL3 here, the rts524A/rts525A will also set,
> but it's not a right address.
Okay.
> >> 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);
> >> +
> > ?
> We set LCTLR to disable aspm, all old chip using 0x80 address,
> but new chip will not use this address, the best way to find
> this address is using pci_find_capability().
I was more concerned with the random '\n' you are adding here.
> >> }
> >>
> >> 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
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