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Subject[PATCH V1 3/3] mmc: host: Register changes for sdcc V5
Date
From: Sayali Lokhande <sayalil@codeaurora.org>

For SDCC version 5.0.0 and higher, new compatible string
"qcom,sdhci-msm-v5" is added.

Based on the msm variant, pick the relevant variant data and
use it for register read/write to msm specific registers.

Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
---
.../devicetree/bindings/mmc/sdhci-msm.txt | 5 +-
drivers/mmc/host/sdhci-msm.c | 344 +++++++++++++--------
2 files changed, 222 insertions(+), 127 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index bfdcdc4..c2b7b2b 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -4,7 +4,10 @@ This file documents differences between the core properties in mmc.txt
and the properties used by the sdhci-msm driver.

Required properties:
-- compatible: Should contain "qcom,sdhci-msm-v4".
+- compatible: Should contain "qcom,sdhci-msm-v4" or "qcom,sdhci-msm-v5".
+ For SDCC version 5.0.0, MCI registers are removed from SDCC
+ interface and some registers are moved to HC. New compatible
+ string is added to support this change - "qcom,sdhci-msm-v5".
- reg: Base address and length of the register in the following order:
- Host controller register map (required)
- SD Core register map (required)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index bb2bb59..408e6b2 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -33,16 +33,11 @@
#define CORE_MCI_GENERICS 0x70
#define SWITCHABLE_SIGNALING_VOLTAGE BIT(29)

-#define CORE_HC_MODE 0x78
#define HC_MODE_EN 0x1
#define CORE_POWER 0x0
#define CORE_SW_RST BIT(7)
#define FF_CLK_SW_RST_DIS BIT(13)

-#define CORE_PWRCTL_STATUS 0xdc
-#define CORE_PWRCTL_MASK 0xe0
-#define CORE_PWRCTL_CLEAR 0xe4
-#define CORE_PWRCTL_CTL 0xe8
#define CORE_PWRCTL_BUS_OFF BIT(0)
#define CORE_PWRCTL_BUS_ON BIT(1)
#define CORE_PWRCTL_IO_LOW BIT(2)
@@ -63,17 +58,13 @@
#define CORE_CDR_EXT_EN BIT(19)
#define CORE_DLL_PDN BIT(29)
#define CORE_DLL_RST BIT(30)
-#define CORE_DLL_CONFIG 0x100
#define CORE_CMD_DAT_TRACK_SEL BIT(0)
-#define CORE_DLL_STATUS 0x108

-#define CORE_DLL_CONFIG_2 0x1b4
#define CORE_DDR_CAL_EN BIT(0)
#define CORE_FLL_CYCLE_CNT BIT(18)
#define CORE_DLL_CLOCK_DISABLE BIT(21)

-#define CORE_VENDOR_SPEC 0x10c
-#define CORE_VENDOR_SPEC_POR_VAL 0xa1c
+#define CORE_VENDOR_SPEC_POR_VAL 0xa1c
#define CORE_CLK_PWRSAVE BIT(1)
#define CORE_HC_MCLK_SEL_DFLT (2 << 8)
#define CORE_HC_MCLK_SEL_HS400 (3 << 8)
@@ -111,17 +102,14 @@
#define CORE_CDC_SWITCH_BYPASS_OFF BIT(0)
#define CORE_CDC_SWITCH_RC_EN BIT(1)

-#define CORE_DDR_200_CFG 0x184
#define CORE_CDC_T4_DLY_SEL BIT(0)
#define CORE_CMDIN_RCLK_EN BIT(1)
#define CORE_START_CDC_TRAFFIC BIT(6)
-#define CORE_VENDOR_SPEC3 0x1b0
+
#define CORE_PWRSAVE_DLL BIT(3)

-#define CORE_DDR_CONFIG 0x1b8
#define DDR_CONFIG_POR_VAL 0x80040853

-#define CORE_VENDOR_SPEC_CAPABILITIES0 0x11c

#define INVALID_TUNING_PHASE -1
#define SDHCI_MSM_MIN_CLOCK 400000
@@ -380,10 +368,14 @@ static inline int msm_dll_poll_ck_out_en(struct sdhci_host *host, u8 poll)
u32 wait_cnt = 50;
u8 ck_out_en;
struct mmc_host *mmc = host->mmc;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

/* Poll for CK_OUT_EN bit. max. poll time = 50us */
- ck_out_en = !!(readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) &
- CORE_CK_OUT_EN);
+ ck_out_en = !!(readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config) & CORE_CK_OUT_EN);

while (ck_out_en != poll) {
if (--wait_cnt == 0) {
@@ -393,8 +385,8 @@ static inline int msm_dll_poll_ck_out_en(struct sdhci_host *host, u8 poll)
}
udelay(1);

- ck_out_en = !!(readl_relaxed(host->ioaddr + CORE_DLL_CONFIG) &
- CORE_CK_OUT_EN);
+ ck_out_en = !!(readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config) & CORE_CK_OUT_EN);
}

return 0;
@@ -410,16 +402,20 @@ static int msm_config_cm_dll_phase(struct sdhci_host *host, u8 phase)
unsigned long flags;
u32 config;
struct mmc_host *mmc = host->mmc;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

if (phase > 0xf)
return -EINVAL;

spin_lock_irqsave(&host->lock, flags);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config);
config &= ~(CORE_CDR_EN | CORE_CK_OUT_EN);
config |= (CORE_CDR_EXT_EN | CORE_DLL_EN);
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);

/* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '0' */
rc = msm_dll_poll_ck_out_en(host, 0);
@@ -430,24 +426,24 @@ static int msm_config_cm_dll_phase(struct sdhci_host *host, u8 phase)
* Write the selected DLL clock output phase (0 ... 15)
* to CDR_SELEXT bit field of DLL_CONFIG register.
*/
- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config);
config &= ~CDR_SELEXT_MASK;
config |= grey_coded_phase_table[phase] << CDR_SELEXT_SHIFT;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config);
config |= CORE_CK_OUT_EN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);

/* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '1' */
rc = msm_dll_poll_ck_out_en(host, 1);
if (rc)
goto err_out;

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config);
config |= CORE_CDR_EN;
config &= ~CORE_CDR_EXT_EN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);
goto out;

err_out:
@@ -573,6 +569,10 @@ static int msm_find_most_appropriate_phase(struct sdhci_host *host,
static inline void msm_cm_dll_set_freq(struct sdhci_host *host)
{
u32 mclk_freq = 0, config;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

/* Program the MCLK value to MCLK_FREQ bit field */
if (host->clock <= 112000000)
@@ -592,10 +592,10 @@ static inline void msm_cm_dll_set_freq(struct sdhci_host *host)
else if (host->clock <= 200000000)
mclk_freq = 7;

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config);
config &= ~CMUX_SHIFT_PHASE_MASK;
config |= mclk_freq << CMUX_SHIFT_PHASE_SHIFT;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);
}

/* Initialize the DLL (Programmable Delay Line) */
@@ -607,6 +607,8 @@ static int msm_init_cm_dll(struct sdhci_host *host)
int wait_cnt = 50;
unsigned long flags;
u32 config;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

spin_lock_irqsave(&host->lock, flags);

@@ -615,34 +617,43 @@ static int msm_init_cm_dll(struct sdhci_host *host)
* tuning is in progress. Keeping PWRSAVE ON may
* turn off the clock.
*/
- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec);
config &= ~CORE_CLK_PWRSAVE;
- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec);

if (msm_host->use_14lpp_dll_reset) {
- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config &= ~CORE_CK_OUT_EN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config_2);
config |= CORE_DLL_CLOCK_DISABLE;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config_2);
}

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_DLL_RST;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_DLL_PDN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);
msm_cm_dll_set_freq(host);

if (msm_host->use_14lpp_dll_reset &&
!IS_ERR_OR_NULL(msm_host->xo_clk)) {
u32 mclk_freq = 0;

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config_2);
config &= CORE_FLL_CYCLE_CNT;
if (config)
mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 8),
@@ -651,40 +662,52 @@ static int msm_init_cm_dll(struct sdhci_host *host)
mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 4),
clk_get_rate(msm_host->xo_clk));

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config_2);
config &= ~(0xFF << 10);
config |= mclk_freq << 10;

- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config_2);
/* wait for 5us before enabling DLL clock */
udelay(5);
}

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config &= ~CORE_DLL_RST;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config &= ~CORE_DLL_PDN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

if (msm_host->use_14lpp_dll_reset) {
msm_cm_dll_set_freq(host);
- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config_2);
config &= ~CORE_DLL_CLOCK_DISABLE;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config_2);
}

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_DLL_EN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_CK_OUT_EN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

/* Wait until DLL_LOCK bit of DLL_STATUS register becomes '1' */
- while (!(readl_relaxed(host->ioaddr + CORE_DLL_STATUS) &
+ while (!(readl_relaxed(host->ioaddr + msm_offset->core_dll_status) &
CORE_DLL_LOCK)) {
/* max. wait for 50us sec for LOCK bit to be set */
if (--wait_cnt == 0) {
@@ -705,19 +728,21 @@ static void msm_hc_select_default(struct sdhci_host *host)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
u32 config;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

if (!msm_host->use_cdclp533) {
config = readl_relaxed(host->ioaddr +
- CORE_VENDOR_SPEC3);
+ msm_offset->core_vendor_spec3);
config &= ~CORE_PWRSAVE_DLL;
writel_relaxed(config, host->ioaddr +
- CORE_VENDOR_SPEC3);
+ msm_offset->core_vendor_spec3);
}

- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec);
config &= ~CORE_HC_MCLK_SEL_MASK;
config |= CORE_HC_MCLK_SEL_DFLT;
- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec);

/*
* Disable HC_SELECT_IN to be able to use the UHS mode select
@@ -726,10 +751,10 @@ static void msm_hc_select_default(struct sdhci_host *host)
* Write 0 to HC_SELECT_IN and HC_SELECT_IN_EN field
* in VENDOR_SPEC_FUNC
*/
- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec);
config &= ~CORE_HC_SELECT_IN_EN;
config &= ~CORE_HC_SELECT_IN_MASK;
- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec);

/*
* Make sure above writes impacting free running MCLK are completed
@@ -745,32 +770,36 @@ static void msm_hc_select_hs400(struct sdhci_host *host)
struct mmc_ios ios = host->mmc->ios;
u32 config, dll_lock;
int rc;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

/* Select the divided clock (free running MCLK/2) */
- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec);
config &= ~CORE_HC_MCLK_SEL_MASK;
config |= CORE_HC_MCLK_SEL_HS400;

- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec);
/*
* Select HS400 mode using the HC_SELECT_IN from VENDOR SPEC
* register
*/
if ((msm_host->tuning_done || ios.enhanced_strobe) &&
!msm_host->calibration_done) {
- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_vendor_spec);
config |= CORE_HC_SELECT_IN_HS400;
config |= CORE_HC_SELECT_IN_EN;
- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_vendor_spec);
}
if (!msm_host->clk_rate && !msm_host->use_cdclp533) {
/*
* Poll on DLL_LOCK or DDR_DLL_LOCK bits in
- * CORE_DLL_STATUS to be set. This should get set
+ * core_dll_status to be set. This should get set
* within 15 us at 200 MHz.
*/
rc = readl_relaxed_poll_timeout(host->ioaddr +
- CORE_DLL_STATUS,
+ msm_offset->core_dll_status,
dll_lock,
(dll_lock &
(CORE_DLL_LOCK |
@@ -822,6 +851,8 @@ static int sdhci_msm_cdclp533_calibration(struct sdhci_host *host)
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
u32 config, calib_done;
int ret;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__);

@@ -838,13 +869,13 @@ static int sdhci_msm_cdclp533_calibration(struct sdhci_host *host)
if (ret)
goto out;

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config);
config |= CORE_CMD_DAT_TRACK_SEL;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_ddr_200_cfg);
config &= ~CORE_CDC_T4_DLY_SEL;
- writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_ddr_200_cfg);

config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_GEN_CFG);
config &= ~CORE_CDC_SWITCH_BYPASS_OFF;
@@ -854,9 +885,9 @@ static int sdhci_msm_cdclp533_calibration(struct sdhci_host *host)
config |= CORE_CDC_SWITCH_RC_EN;
writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_GEN_CFG);

- config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_ddr_200_cfg);
config &= ~CORE_START_CDC_TRAFFIC;
- writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_ddr_200_cfg);

/* Perform CDC Register Initialization Sequence */

@@ -908,9 +939,9 @@ static int sdhci_msm_cdclp533_calibration(struct sdhci_host *host)
goto out;
}

- config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_ddr_200_cfg);
config |= CORE_START_CDC_TRAFFIC;
- writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_ddr_200_cfg);
out:
pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc),
__func__, ret);
@@ -922,32 +953,40 @@ static int sdhci_msm_cm_dll_sdc4_calibration(struct sdhci_host *host)
struct mmc_host *mmc = host->mmc;
u32 dll_status, config;
int ret;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__);

/*
- * Currently the CORE_DDR_CONFIG register defaults to desired
+ * Currently the core_ddr_config register defaults to desired
* configuration on reset. Currently reprogramming the power on
* reset (POR) value in case it might have been modified by
* bootloaders. In the future, if this changes, then the desired
* values will need to be programmed appropriately.
*/
- writel_relaxed(DDR_CONFIG_POR_VAL, host->ioaddr + CORE_DDR_CONFIG);
+ writel_relaxed(DDR_CONFIG_POR_VAL, host->ioaddr +
+ msm_offset->core_ddr_config);

if (mmc->ios.enhanced_strobe) {
- config = readl_relaxed(host->ioaddr + CORE_DDR_200_CFG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_ddr_200_cfg);
config |= CORE_CMDIN_RCLK_EN;
- writel_relaxed(config, host->ioaddr + CORE_DDR_200_CFG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_ddr_200_cfg);
}

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG_2);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_dll_config_2);
config |= CORE_DDR_CAL_EN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG_2);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_dll_config_2);

- ret = readl_relaxed_poll_timeout(host->ioaddr + CORE_DLL_STATUS,
- dll_status,
- (dll_status & CORE_DDR_DLL_LOCK),
- 10, 1000);
+ ret = readl_relaxed_poll_timeout(host->ioaddr +
+ msm_offset->core_dll_status,
+ dll_status,
+ (dll_status & CORE_DDR_DLL_LOCK),
+ 10, 1000);

if (ret == -ETIMEDOUT) {
pr_err("%s: %s: CM_DLL_SDC4 calibration was not completed\n",
@@ -955,9 +994,9 @@ static int sdhci_msm_cm_dll_sdc4_calibration(struct sdhci_host *host)
goto out;
}

- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC3);
+ config = readl_relaxed(host->ioaddr + msm_offset->core_vendor_spec3);
config |= CORE_PWRSAVE_DLL;
- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC3);
+ writel_relaxed(config, host->ioaddr + msm_offset->core_vendor_spec3);

/*
* Drain writebuffer to ensure above DLL calibration
@@ -977,6 +1016,8 @@ static int sdhci_msm_hs400_dll_calibration(struct sdhci_host *host)
struct mmc_host *mmc = host->mmc;
int ret;
u32 config;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__);

@@ -994,9 +1035,11 @@ static int sdhci_msm_hs400_dll_calibration(struct sdhci_host *host)
msm_host->saved_tuning_phase);
if (ret)
goto out;
- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_CMD_DAT_TRACK_SEL;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);
}

if (msm_host->use_cdclp533)
@@ -1126,6 +1169,8 @@ static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host,
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
u16 ctrl_2;
u32 config;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
/* Select Bus Speed Mode for host */
@@ -1166,13 +1211,17 @@ static void sdhci_msm_set_uhs_signaling(struct sdhci_host *host,
* DLL is not required for clock <= 100MHz
* Thus, make sure DLL it is disabled when not required
*/
- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_DLL_RST;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

- config = readl_relaxed(host->ioaddr + CORE_DLL_CONFIG);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_dll_config);
config |= CORE_DLL_PDN;
- writel_relaxed(config, host->ioaddr + CORE_DLL_CONFIG);
+ writel_relaxed(config, host->ioaddr +
+ msm_offset->core_dll_config);

/*
* The DLL needs to be restored and CDCLP533 recalibrated
@@ -1214,7 +1263,9 @@ static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
bool done = false;
- u32 val;
+ u32 val = SWITCHABLE_SIGNALING_VOLTAGE;
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n",
mmc_hostname(host->mmc), __func__, req_type,
@@ -1223,8 +1274,12 @@ static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type)
/*
* The power interrupt will not be generated for signal voltage
* switches if SWITCHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set.
+ * Since sdhci-msm-v5, this bit has been removed and SW must consider
+ * it as always set.
*/
- val = readl(msm_host->core_mem + CORE_MCI_GENERICS);
+ if (!msm_host->mci_removed)
+ val = msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_generics);
if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) &&
!(val & SWITCHABLE_SIGNALING_VOLTAGE)) {
return;
@@ -1272,12 +1327,17 @@ static void sdhci_msm_dump_pwr_ctrl_regs(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_msm_offset *msm_offset =
+ msm_host->offset;

pr_err("%s: PWRCTL_STATUS: 0x%08x | PWRCTL_MASK: 0x%08x | PWRCTL_CTL: 0x%08x\n",
- mmc_hostname(host->mmc),
- readl_relaxed(msm_host->core_mem + CORE_PWRCTL_STATUS),
- readl_relaxed(msm_host->core_mem + CORE_PWRCTL_MASK),
- readl_relaxed(msm_host->core_mem + CORE_PWRCTL_CTL));
+ mmc_hostname(host->mmc),
+ msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_pwrctl_status),
+ msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_pwrctl_mask),
+ msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_pwrctl_ctl));
}

static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
@@ -1288,11 +1348,14 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
int retry = 10;
u32 pwr_state = 0, io_level = 0;
u32 config;
+ const struct sdhci_msm_offset *msm_offset = msm_host->offset;

- irq_status = readl_relaxed(msm_host->core_mem + CORE_PWRCTL_STATUS);
+ irq_status = msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_pwrctl_status);
irq_status &= INT_MASK;

- writel_relaxed(irq_status, msm_host->core_mem + CORE_PWRCTL_CLEAR);
+ msm_host->var_ops->msm_writel_relaxed(irq_status, host,
+ msm_offset->core_pwrctl_clear);

/*
* There is a rare HW scenario where the first clear pulse could be
@@ -1301,8 +1364,8 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
* sure status register is cleared. Otherwise, this will result in
* a spurious power IRQ resulting in system instability.
*/
- while (irq_status & readl_relaxed(msm_host->core_mem +
- CORE_PWRCTL_STATUS)) {
+ while (irq_status & msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_pwrctl_status)) {
if (retry == 0) {
pr_err("%s: Timedout clearing (0x%x) pwrctl status register\n",
mmc_hostname(host->mmc), irq_status);
@@ -1310,8 +1373,8 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
WARN_ON(1);
break;
}
- writel_relaxed(irq_status,
- msm_host->core_mem + CORE_PWRCTL_CLEAR);
+ msm_host->var_ops->msm_writel_relaxed(irq_status, host,
+ msm_offset->core_pwrctl_clear);
retry--;
udelay(10);
}
@@ -1342,7 +1405,8 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
* report back if it succeded or not to this register. The voltage
* switches are handled by the sdhci core, so just report success.
*/
- writel_relaxed(irq_ack, msm_host->core_mem + CORE_PWRCTL_CTL);
+ msm_host->var_ops->msm_writel_relaxed(irq_ack, host,
+ msm_offset->core_pwrctl_ctl);

/*
* If we don't have info regarding the voltage levels supported by
@@ -1361,7 +1425,8 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
* controllers with only 1.8V, we will set the IO PAD bit
* without waiting for a REQ_IO_LOW.
*/
- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_vendor_spec);
new_config = config;

if ((io_level & REQ_IO_HIGH) &&
@@ -1372,8 +1437,8 @@ static void sdhci_msm_handle_pwr_irq(struct sdhci_host *host, int irq)
new_config |= CORE_IO_PAD_PWR_SWITCH;

if (config ^ new_config)
- writel_relaxed(new_config,
- host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(new_config, host->ioaddr +
+ msm_offset->core_vendor_spec);
}

if (pwr_state)
@@ -1534,6 +1599,7 @@ static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host)
struct regulator *supply = mmc->supply.vqmmc;
u32 caps = 0, config;
struct sdhci_host *host = mmc_priv(mmc);
+ const struct sdhci_msm_offset *msm_offset = msm_host->offset;

if (!IS_ERR(mmc->supply.vqmmc)) {
if (regulator_is_supported_voltage(supply, 1700000, 1950000))
@@ -1553,7 +1619,8 @@ static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host)
*/
u32 io_level = msm_host->curr_io_level;

- config = readl_relaxed(host->ioaddr + CORE_VENDOR_SPEC);
+ config = readl_relaxed(host->ioaddr +
+ msm_offset->core_vendor_spec);
config |= CORE_IO_PAD_PWR_SWITCH_EN;

if ((io_level & REQ_IO_HIGH) && (caps & CORE_3_0V_SUPPORT))
@@ -1561,7 +1628,8 @@ static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host)
else if ((io_level & REQ_IO_LOW) || (caps & CORE_1_8V_SUPPORT))
config |= CORE_IO_PAD_PWR_SWITCH;

- writel_relaxed(config, host->ioaddr + CORE_VENDOR_SPEC);
+ writel_relaxed(config,
+ host->ioaddr + msm_offset->core_vendor_spec);
}
msm_host->caps_0 |= caps;
pr_debug("%s: supported caps: 0x%08x\n", mmc_hostname(mmc), caps);
@@ -1594,7 +1662,8 @@ static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host)
};

static const struct of_device_id sdhci_msm_dt_match[] = {
- { .compatible = "qcom,sdhci-msm-v4" },
+ {.compatible = "qcom,sdhci-msm-v4", .data = &sdhci_msm_mci_var},
+ {.compatible = "qcom,sdhci-msm-v5", .data = &sdhci_msm_v5_var},
{},
};

@@ -1631,6 +1700,8 @@ static int sdhci_msm_probe(struct platform_device *pdev)
u16 host_version, core_minor;
u32 core_version, config;
u8 core_major;
+ const struct sdhci_msm_offset *msm_offset;
+ const struct sdhci_msm_variant_info *var_info;

host = sdhci_pltfm_init(pdev, &sdhci_msm_pdata, sizeof(*msm_host));
if (IS_ERR(host))
@@ -1646,6 +1717,18 @@ static int sdhci_msm_probe(struct platform_device *pdev)
if (ret)
goto pltfm_free;

+ /*
+ * Based on the compatible string, load the required msm host info from
+ * the data associated with the version info.
+ */
+ var_info = of_device_get_match_data(&pdev->dev);
+
+ msm_host->mci_removed = var_info->mci_removed;
+ msm_host->var_ops = var_info->var_ops;
+ msm_host->offset = var_info->offset;
+
+ msm_offset = msm_host->offset;
+
sdhci_get_of_property(pdev);

msm_host->saved_tuning_phase = INVALID_TUNING_PHASE;
@@ -1710,32 +1793,40 @@ static int sdhci_msm_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "TCXO clk not present (%d)\n", ret);
}

- core_memres = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- msm_host->core_mem = devm_ioremap_resource(&pdev->dev, core_memres);
+ if (!msm_host->mci_removed) {
+ core_memres = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ msm_host->core_mem = devm_ioremap_resource(&pdev->dev,
+ core_memres);

- if (IS_ERR(msm_host->core_mem)) {
- dev_err(&pdev->dev, "Failed to remap registers\n");
- ret = PTR_ERR(msm_host->core_mem);
- goto clk_disable;
+ if (IS_ERR(msm_host->core_mem)) {
+ dev_err(&pdev->dev, "Failed to remap registers\n");
+ ret = PTR_ERR(msm_host->core_mem);
+ goto clk_disable;
+ }
}

/* Reset the vendor spec register to power on reset state */
writel_relaxed(CORE_VENDOR_SPEC_POR_VAL,
- host->ioaddr + CORE_VENDOR_SPEC);
-
- /* Set HC_MODE_EN bit in HC_MODE register */
- writel_relaxed(HC_MODE_EN, (msm_host->core_mem + CORE_HC_MODE));
-
- config = readl_relaxed(msm_host->core_mem + CORE_HC_MODE);
- config |= FF_CLK_SW_RST_DIS;
- writel_relaxed(config, msm_host->core_mem + CORE_HC_MODE);
+ host->ioaddr + msm_offset->core_vendor_spec);
+
+ if (!msm_host->mci_removed) {
+ /* Set HC_MODE_EN bit in HC_MODE register */
+ msm_host->var_ops->msm_writel_relaxed(HC_MODE_EN, host,
+ msm_offset->core_hc_mode);
+ config = msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_hc_mode);
+ config |= FF_CLK_SW_RST_DIS;
+ msm_host->var_ops->msm_writel_relaxed(config, host,
+ msm_offset->core_hc_mode);
+ }

host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION));
dev_dbg(&pdev->dev, "Host Version: 0x%x Vendor Version 0x%x\n",
host_version, ((host_version & SDHCI_VENDOR_VER_MASK) >>
SDHCI_VENDOR_VER_SHIFT));

- core_version = readl_relaxed(msm_host->core_mem + CORE_MCI_VERSION);
+ core_version = msm_host->var_ops->msm_readl_relaxed(host,
+ msm_offset->core_mci_version);
core_major = (core_version & CORE_VERSION_MAJOR_MASK) >>
CORE_VERSION_MAJOR_SHIFT;
core_minor = core_version & CORE_VERSION_MINOR_MASK;
@@ -1760,7 +1851,7 @@ static int sdhci_msm_probe(struct platform_device *pdev)
config = readl_relaxed(host->ioaddr + SDHCI_CAPABILITIES);
config |= SDHCI_CAN_VDD_300 | SDHCI_CAN_DO_8BIT;
writel_relaxed(config, host->ioaddr +
- CORE_VENDOR_SPEC_CAPABILITIES0);
+ msm_offset->core_vendor_spec_capabilities0);
}

/*
@@ -1789,7 +1880,8 @@ static int sdhci_msm_probe(struct platform_device *pdev)

sdhci_msm_init_pwr_irq_wait(msm_host);
/* Enable pwr irq interrupts */
- writel_relaxed(INT_MASK, msm_host->core_mem + CORE_PWRCTL_MASK);
+ msm_host->var_ops->msm_writel_relaxed(INT_MASK, host,
+ msm_offset->core_pwrctl_mask);

ret = devm_request_threaded_irq(&pdev->dev, msm_host->pwr_irq, NULL,
sdhci_msm_pwr_irq, IRQF_ONESHOT,
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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