Re: [PATCH 08/10] mfd: rtsx: add support for rts524A

From: Lee Jones
Date: Sun Jan 18 2015 - 07:21:10 EST

On Thu, 15 Jan 2015, micky_ching@xxxxxxxxxxxxxx wrote:

> From: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
>
> add support for new chip rts524A.
>
> Signed-off-by: Micky Ching <micky_ching@xxxxxxxxxxxxxx>
> ---
> drivers/mfd/rts5249.c | 112 +++++++++++++++++++++++++++++++++++++++----
> drivers/mfd/rtsx_pcr.c | 5 ++
> drivers/mfd/rtsx_pcr.h | 4 ++
> include/linux/mfd/rtsx_pci.h | 87 ++++++++++++++++++++++++++++++++-
> 4 files changed, 198 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
> index 5eb9819..1ce03a6 100644
> --- a/drivers/mfd/rts5249.c
> +++ b/drivers/mfd/rts5249.c
> @@ -72,8 +72,10 @@ static void rts5249_fetch_vendor_settings(struct rtsx_pcr *pcr)
> rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
> dev_dbg(&(pcr->pci->dev), "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
>
> - if (!rtsx_vendor_setting_valid(reg))
> + if (!rtsx_vendor_setting_valid(reg)) {
> + pcr_dbg(pcr, "skip fetch vendor setting\n");
> return;
> + }

This doesn't have anything to do with adding the new chip.

And I'm not sure it's even required.

> pcr->aspm_en = rtsx_reg_to_aspm(reg);
> pcr->sd30_drive_sel_1v8 = rtsx_reg_to_sd30_drive_sel_1v8(reg);
> @@ -94,8 +96,14 @@ static void rts5249_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
> rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, 0xFF, 0);
> rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3, 0x01, 0);
>
> - if (pm_state == HOST_ENTER_S3)
> - rtsx_pci_write_register(pcr, PM_CTRL3, 0x10, 0x10);
> + if (pm_state == HOST_ENTER_S3) {
> + if (PCI_PID(pcr) == 0x524A)
> + rtsx_pci_write_register(pcr, RTS524A_PM_CTRL3,
> + D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
> + else if (PCI_PID(pcr) == 0x5249)
> + rtsx_pci_write_register(pcr, PM_CTRL3,
> + D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
> + }
>
> rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
> }
> @@ -104,6 +112,8 @@ static int rts5249_extra_init_hw(struct rtsx_pcr *pcr)
> {
> rtsx_pci_init_cmd(pcr);
>
> + /* Rest L1SUB Config */
> + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, L1SUB_CONFIG3, 0xFF, 0x00);
> /* Configure GPIO as output */
> rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
> /* Reset ASPM state to default value */
> @@ -228,14 +238,20 @@ static int rts5249_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
> int err;

This function name is now misleading.

Please change it, or at least add a comment saying that it doesn't
only support the 5249.

> if (voltage == OUTPUT_3V3) {
> - err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4FC0 | 0x24);
> + err = rtsx_pci_update_phy(pcr, PHY_TUNE, 0xFC3F, 0x03C0);
> if (err < 0)
> return err;
> } else if (voltage == OUTPUT_1V8) {
> - err = rtsx_pci_write_phy_register(pcr, PHY_BACR, 0x3C02);
> - if (err < 0)
> - return err;
> - err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, 0x4C40 | 0x24);
> + u16 append = 0x0100;
> +
> + if (PCI_PID(pcr) == 0x5249) {
> + err = rtsx_pci_update_phy(pcr, PHY_BACR, 0xFFF3, 0);
> + if (err < 0)
> + return err;
> + append = 0x0080;
> + }
> +
> + err = rtsx_pci_update_phy(pcr, PHY_TUNE, 0xFC3F, append);
> if (err < 0)
> return err;
> } else {
> @@ -334,3 +350,83 @@ void rts5249_init_params(struct rtsx_pcr *pcr)
> pcr->ms_pull_ctl_enable_tbl = rts5249_ms_pull_ctl_enable_tbl;
> pcr->ms_pull_ctl_disable_tbl = rts5249_ms_pull_ctl_disable_tbl;
> }
> +
> +static inline int rts524a_write_phy(struct rtsx_pcr *pcr, u8 addr, u16 val)
> +{
> + addr = addr & 0x80 ? (addr & 0x7F) | 0x40 : addr;
> + return rtsx_pci_write_phy_register(pcr, addr, val);
> +}
> +
> +static int rts524a_optimize_phy(struct rtsx_pcr *pcr)
> +{
> + int err;
> +
> + err = rtsx_pci_write_register(pcr, RTS524A_PM_CTRL3,
> + D3_DELINK_MODE_EN, 0x00);
> + if (err < 0)
> + return err;

if (err)

> + rts524a_write_phy(pcr, 0x00, 0xBA42);
> + rts524a_write_phy(pcr, 0x03, 0x2748);
> +
> + if (is_version(pcr, 0x524A, IC_VER_A)) {
> + rts524a_write_phy(pcr, 0x03, 0x2748);
> + rts524a_write_phy(pcr, 0x02, 0x0A1F);
> + rts524a_write_phy(pcr, 0x1A, 0x2546);
> + rts524a_write_phy(pcr, 0x1D, 0x0004);
> + rts524a_write_phy(pcr, 0x1E, 0x5C7F);

I have no idea what this is doing!

Please humanise this nonsense.

> + }
> +
> + rts524a_write_phy(pcr, 0x08, 0x57E4);
> +
> + return 0;
> +}
> +
> +static int rts524a_extra_init_hw(struct rtsx_pcr *pcr)
> +{
> + rts5249_extra_init_hw(pcr);
> +
> + rtsx_pci_write_register(pcr, FUNC_FORCE_CTL, 0x02, 0x02);

?

> + rtsx_pci_write_register(pcr, PM_EVENT_DEBUG, PME_DEBUG_0, PME_DEBUG_0);
> + rtsx_pci_write_register(pcr, LDO_VCC_CFG1, LDO_VCC_LMT_EN,
> + LDO_VCC_LMT_EN);
> + rtsx_pci_write_register(pcr, PCLK_CTL, PCLK_MODE_SEL, PCLK_MODE_SEL);
> + if (is_version(pcr, 0x524A, IC_VER_A)) {
> + rtsx_pci_write_register(pcr, LDO_DV18_CFG,
> + LDO_DV18_SR_MASK, LDO_DV18_SR_DF);
> + rtsx_pci_write_register(pcr, LDO_VCC_CFG1,
> + LDO_VCC_REF_TUNE_MASK, LDO_VCC_REF_1V2);
> + rtsx_pci_write_register(pcr, LDO_VIO_CFG,
> + LDO_VIO_REF_TUNE_MASK, LDO_VIO_REF_1V2);
> + rtsx_pci_write_register(pcr, LDO_VIO_CFG,
> + LDO_VIO_SR_MASK, LDO_VIO_SR_DF);
> + rtsx_pci_write_register(pcr, LDO_DV12S_CFG,
> + LDO_REF12_TUNE_MASK, LDO_REF12_TUNE_DF);
> + rtsx_pci_write_register(pcr, SD40_LDO_CTL1,
> + SD40_VIO_TUNE_MASK, SD40_VIO_TUNE_1V7);
> + }
> +
> + return 0;
> +}
> +
> +static const struct pcr_ops rts524a_pcr_ops = {
> + .fetch_vendor_settings = rts5249_fetch_vendor_settings,
> + .extra_init_hw = rts524a_extra_init_hw,
> + .optimize_phy = rts524a_optimize_phy,
> + .turn_on_led = rts5249_turn_on_led,
> + .turn_off_led = rts5249_turn_off_led,
> + .enable_auto_blink = rts5249_enable_auto_blink,
> + .disable_auto_blink = rts5249_disable_auto_blink,
> + .card_power_on = rts5249_card_power_on,
> + .card_power_off = rts5249_card_power_off,
> + .switch_output_voltage = rts5249_switch_output_voltage,
> + .force_power_down = rts5249_force_power_down,

You might need to change the name of some of these functions (or at
least add comments) if you plan on using them for multiple devices.

> +};
> +
> +void rts524a_init_params(struct rtsx_pcr *pcr)
> +{
> + rts5249_init_params(pcr);
> +
> + pcr->ops = &rts524a_pcr_ops;
> +}

I see a couple of these now. Why don't you make 'ops' a parameter of
*_init_params().

> diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
> index 3065edc..17334ba 100644
> --- a/drivers/mfd/rtsx_pcr.c
> +++ b/drivers/mfd/rtsx_pcr.c
> @@ -58,6 +58,7 @@ static const struct pci_device_id rtsx_pci_ids[] = {
> { PCI_DEVICE(0x10EC, 0x5249), PCI_CLASS_OTHERS << 16, 0xFF0000 },
> { PCI_DEVICE(0x10EC, 0x5287), PCI_CLASS_OTHERS << 16, 0xFF0000 },
> { PCI_DEVICE(0x10EC, 0x5286), PCI_CLASS_OTHERS << 16, 0xFF0000 },
> + { PCI_DEVICE(0x10EC, 0x524A), PCI_CLASS_OTHERS << 16, 0xFF0000 },
> { 0, }
> };
>
> @@ -1108,6 +1109,10 @@ static int rtsx_pci_init_chip(struct rtsx_pcr *pcr)
> rts5249_init_params(pcr);
> break;
>
> + case 0x524A:
> + rts524a_init_params(pcr);
> + break;
> +
> case 0x5287:
> rtl8411b_init_params(pcr);
> break;
> diff --git a/drivers/mfd/rtsx_pcr.h b/drivers/mfd/rtsx_pcr.h
> index fe2bbb6..0535265 100644
> --- a/drivers/mfd/rtsx_pcr.h
> +++ b/drivers/mfd/rtsx_pcr.h
> @@ -27,12 +27,16 @@
> #define MIN_DIV_N_PCR 80
> #define MAX_DIV_N_PCR 208
>
> +#define RTS524A_PME_FORCE_CTL 0xFF78
> +#define RTS524A_PM_CTRL3 0xFF7E
> +
> void rts5209_init_params(struct rtsx_pcr *pcr);
> void rts5229_init_params(struct rtsx_pcr *pcr);
> void rtl8411_init_params(struct rtsx_pcr *pcr);
> void rtl8402_init_params(struct rtsx_pcr *pcr);
> void rts5227_init_params(struct rtsx_pcr *pcr);
> void rts5249_init_params(struct rtsx_pcr *pcr);
> +void rts524a_init_params(struct rtsx_pcr *pcr);
> void rtl8411b_init_params(struct rtsx_pcr *pcr);
>
> static inline u8 map_sd_drive(int idx)
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index f7cebdb..ab6da29 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -577,8 +577,13 @@
>
> #define CDRESUMECTL 0xFE52
> #define WAKE_SEL_CTL 0xFE54
> +#define PCLK_CTL 0xFE55
> +#define PCLK_MODE_SEL 0x20
> #define PME_FORCE_CTL 0xFE56
> +
> #define ASPM_FORCE_CTL 0xFE57
> +#define FORCE_ASPM_CTL0 0x10
> +#define FORCE_ASPM_VAL_MASK 0x03
> #define PM_CLK_FORCE_CTL 0xFE58
> #define FUNC_FORCE_CTL 0xFE59
> #define PERST_GLITCH_WIDTH 0xFE5C
> @@ -590,7 +595,8 @@
> #define HOST_ENTER_S3 2
>
> #define SDIO_CFG 0xFE70
> -
> +#define PM_EVENT_DEBUG 0xFE71
> +#define PME_DEBUG_0 0x08
> #define NFTS_TX_CTRL 0xFE72
>
> #define PWR_GATE_CTRL 0xFE75
> @@ -602,12 +608,19 @@
> #define PWD_SUSPEND_EN 0xFE76
> #define LDO_PWR_SEL 0xFE78
>
> +#define L1SUB_CONFIG1 0xFE8D
> +#define L1SUB_CONFIG2 0xFE8E
> +#define L1SUB_AUTO_CFG 0x02
> +#define L1SUB_CONFIG3 0xFE8F
> +
> #define DUMMY_REG_RESET_0 0xFE90
>
> #define AUTOLOAD_CFG_BASE 0xFF00
> #define PETXCFG 0xFF03
>
> #define PM_CTRL1 0xFF44
> +#define CD_RESUME_EN_MASK 0xF0
> +
> #define PM_CTRL2 0xFF45
> #define PM_CTRL3 0xFF46
> #define SDIO_SEND_PME_EN 0x80
> @@ -628,6 +641,61 @@
> #define IMAGE_FLAG_ADDR0 0xCE80
> #define IMAGE_FLAG_ADDR1 0xCE81
>
> +#define RREF_CFG 0xFF6C
> +#define RREF_VBGSEL_MASK 0x38
> +#define RREF_VBGSEL_1V25 0x28
> +
> +#define OOBS_CONFIG 0xFF6E
> +#define OOBS_AUTOK_DIS 0x80
> +#define OOBS_VAL_MASK 0x1F
> +
> +#define LDO_DV18_CFG 0xFF70
> +#define LDO_DV18_SR_MASK 0xC0
> +#define LDO_DV18_SR_DF 0x40
> +
> +#define LDO_CONFIG2 0xFF71
> +#define LDO_D3318_MASK 0x07
> +#define LDO_D3318_33V 0x07
> +#define LDO_D3318_18V 0x02
> +
> +#define LDO_VCC_CFG0 0xFF72
> +#define LDO_VCC_LMTVTH_MASK 0x30
> +#define LDO_VCC_LMTVTH_2A 0x10
> +
> +#define LDO_VCC_CFG1 0xFF73
> +#define LDO_VCC_REF_TUNE_MASK 0x30
> +#define LDO_VCC_REF_1V2 0x20
> +#define LDO_VCC_TUNE_MASK 0x07
> +#define LDO_VCC_1V8 0x04
> +#define LDO_VCC_3V3 0x07
> +#define LDO_VCC_LMT_EN 0x08
> +
> +#define LDO_VIO_CFG 0xFF75
> +#define LDO_VIO_SR_MASK 0xC0
> +#define LDO_VIO_SR_DF 0x40
> +#define LDO_VIO_REF_TUNE_MASK 0x30
> +#define LDO_VIO_REF_1V2 0x20
> +#define LDO_VIO_TUNE_MASK 0x07
> +#define LDO_VIO_1V7 0x03
> +#define LDO_VIO_1V8 0x04
> +#define LDO_VIO_3V3 0x07
> +
> +#define LDO_DV12S_CFG 0xFF76
> +#define LDO_REF12_TUNE_MASK 0x18
> +#define LDO_REF12_TUNE_DF 0x10
> +#define LDO_D12_TUNE_MASK 0x07
> +#define LDO_D12_TUNE_DF 0x04
> +
> +#define LDO_AV12S_CFG 0xFF77
> +#define LDO_AV12S_TUNE_MASK 0x07
> +#define LDO_AV12S_TUNE_DF 0x04
> +
> +#define SD40_LDO_CTL1 0xFE7D
> +#define SD40_VIO_TUNE_MASK 0x70
> +#define SD40_VIO_TUNE_1V7 0x30
> +#define SD_VIO_LDO_1V8 0x40
> +#define SD_VIO_LDO_3V3 0x70
> +
> /* Phy register */
> #define PHY_PCR 0x00
> #define PHY_RCR0 0x01
> @@ -828,7 +896,8 @@ struct rtsx_pcr {
> #define CHK_PCI_PID(pcr, pid) ((pcr)->pci->device == (pid))
> #define PCI_VID(pcr) ((pcr)->pci->vendor)
> #define PCI_PID(pcr) ((pcr)->pci->device)
> -
> +#define is_version(pcr, pid, ver) \
> + (CHK_PCI_PID(pcr, pid) && (pcr)->ic_version == (ver))
> #define pcr_dbg(pcr, fmt, arg...) \
> dev_dbg(&(pcr)->pci->dev, fmt, ##arg)
> #define SDR104_PHASE(val) ((val) & 0xFF)
> @@ -899,4 +968,18 @@ static inline void rtsx_pci_write_be32(struct rtsx_pcr *pcr, u16 reg, u32 val)
> rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, reg + 3, 0xFF, val);
> }
>
> +static inline int rtsx_pci_update_phy(struct rtsx_pcr *pcr, u8 addr,
> + u16 mask, u16 append)
> +{
> + int err = 0;
> + u16 val = 0;

Not sure why you've pre-initialised these?

> + err = rtsx_pci_read_phy_register(pcr, addr, &val);
> + if (err < 0)

if (err)

> + return err;
> +
> + err = rtsx_pci_write_phy_register(pcr, addr, (val & mask) | append);
> + return err;

Just return right away. No need to load 'err'.

> +}
> +
> #endif

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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