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Date: Mon, 19 Jan 2015 01:12:12 +0000
From: 敬锐 <micky_ching@...lsil.com.cn>
To: Lee Jones <lee.jones@...aro.org>
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 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.
>
>> 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().
>
>> }
>>
>> 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
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