| Message ID | 20211221040940.484-1-fred.ai@bayhubtech.com |
|---|---|
| State | New |
| Headers | show |
| Series | [V4,1/2] mmc:sdhci-pci-o2micro:Improve card input timing at SDR104/HS200 mode | expand |
On Tue, 21 Dec 2021 at 05:09, fred <fred.ai@bayhubtech.com> wrote: > > From: Fred Ai <fred.ai@bayhubtech.com> > > Card input timing is margin, need to adjust the hold timing of card input. > > Signed-off-by: Fred Ai <fred.ai@bayhubtech.com> Applied for next, thanks! Kind regards Uffe > --- > Change in V4: > 1.Select suit DLL phase's output clock as SD interface clock at SDR104/HS200 mode. > 2.Deselect DLL output phase as SD interface clock before next card initialization. > --- > drivers/mmc/host/sdhci-pci-o2micro.c | 57 +++++++++++++++++++++++----- > 1 file changed, 48 insertions(+), 9 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c > index f045c1ee4667..56e9f93999c4 100644 > --- a/drivers/mmc/host/sdhci-pci-o2micro.c > +++ b/drivers/mmc/host/sdhci-pci-o2micro.c > @@ -12,6 +12,7 @@ > #include <linux/mmc/mmc.h> > #include <linux/delay.h> > #include <linux/iopoll.h> > +#include <linux/bitfield.h> > > #include "sdhci.h" > #include "sdhci-pci.h" > @@ -43,12 +44,16 @@ > #define O2_SD_CAP_REG0 0x334 > #define O2_SD_UHS1_CAP_SETTING 0x33C > #define O2_SD_DELAY_CTRL 0x350 > +#define O2_SD_OUTPUT_CLK_SOURCE_SWITCH 0x354 > #define O2_SD_UHS2_L1_CTRL 0x35C > #define O2_SD_FUNC_REG3 0x3E0 > #define O2_SD_FUNC_REG4 0x3E4 > #define O2_SD_LED_ENABLE BIT(6) > #define O2_SD_FREG0_LEDOFF BIT(13) > +#define O2_SD_SEL_DLL BIT(16) > #define O2_SD_FREG4_ENABLE_CLK_SET BIT(22) > +#define O2_SD_PHASE_MASK GENMASK(23, 20) > +#define O2_SD_FIX_PHASE FIELD_PREP(O2_SD_PHASE_MASK, 0x9) > > #define O2_SD_VENDOR_SETTING 0x110 > #define O2_SD_VENDOR_SETTING2 0x1C8 > @@ -301,9 +306,13 @@ static int sdhci_o2_dll_recovery(struct sdhci_host *host) > static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode) > { > struct sdhci_host *host = mmc_priv(mmc); > + struct sdhci_pci_slot *slot = sdhci_priv(host); > + struct sdhci_pci_chip *chip = slot->chip; > int current_bus_width = 0; > u32 scratch32 = 0; > u16 scratch = 0; > + u8 scratch_8 = 0; > + u32 reg_val; > > /* > * This handler only implements the eMMC tuning that is specific to > @@ -322,6 +331,32 @@ static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode) > scratch |= O2_SD_PWR_FORCE_L0; > sdhci_writew(host, scratch, O2_SD_MISC_CTRL); > > + /* Stop clk */ > + reg_val = sdhci_readw(host, SDHCI_CLOCK_CONTROL); > + reg_val &= ~SDHCI_CLOCK_CARD_EN; > + sdhci_writew(host, reg_val, SDHCI_CLOCK_CONTROL); > + > + /* UnLock WP */ > + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8); > + scratch_8 &= 0x7f; > + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8); > + > + /* Set pcr 0x354[16] to choose dll clock, and set the default phase */ > + pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, ®_val); > + reg_val &= ~(O2_SD_SEL_DLL | O2_SD_PHASE_MASK); > + reg_val |= (O2_SD_SEL_DLL | O2_SD_FIX_PHASE); > + pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, reg_val); > + > + /* Lock WP */ > + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8); > + scratch_8 |= 0x80; > + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8); > + > + /* Start clk */ > + reg_val = sdhci_readw(host, SDHCI_CLOCK_CONTROL); > + reg_val |= SDHCI_CLOCK_CARD_EN; > + sdhci_writew(host, reg_val, SDHCI_CLOCK_CONTROL); > + > /* wait DLL lock, timeout value 5ms */ > if (readx_poll_timeout(sdhci_o2_pll_dll_wdt_control, host, > scratch32, (scratch32 & O2_DLL_LOCK_STATUS), 1, 5000)) > @@ -533,22 +568,26 @@ static void sdhci_pci_o2_set_clock(struct sdhci_host *host, unsigned int clock) > if (clock == 0) > return; > > - if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) { > - pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); > - > - scratch &= 0x7f; > - pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); > + /* UnLock WP */ > + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); > + scratch &= 0x7f; > + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); > > + if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) { > pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32); > > if ((scratch_32 & 0xFFFF0000) != 0x2c280000) > o2_pci_set_baseclk(chip, 0x2c280000); > + } > > - pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); > + pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32); > + scratch_32 &= ~(O2_SD_SEL_DLL | O2_SD_PHASE_MASK); > + pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, scratch_32); > > - scratch |= 0x80; > - pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); > - } > + /* Lock WP */ > + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); > + scratch |= 0x80; > + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); > > clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock); > sdhci_o2_enable_clk(host, clk); > -- > 2.32.0 >
diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c index f045c1ee4667..56e9f93999c4 100644 --- a/drivers/mmc/host/sdhci-pci-o2micro.c +++ b/drivers/mmc/host/sdhci-pci-o2micro.c @@ -12,6 +12,7 @@ #include <linux/mmc/mmc.h> #include <linux/delay.h> #include <linux/iopoll.h> +#include <linux/bitfield.h> #include "sdhci.h" #include "sdhci-pci.h" @@ -43,12 +44,16 @@ #define O2_SD_CAP_REG0 0x334 #define O2_SD_UHS1_CAP_SETTING 0x33C #define O2_SD_DELAY_CTRL 0x350 +#define O2_SD_OUTPUT_CLK_SOURCE_SWITCH 0x354 #define O2_SD_UHS2_L1_CTRL 0x35C #define O2_SD_FUNC_REG3 0x3E0 #define O2_SD_FUNC_REG4 0x3E4 #define O2_SD_LED_ENABLE BIT(6) #define O2_SD_FREG0_LEDOFF BIT(13) +#define O2_SD_SEL_DLL BIT(16) #define O2_SD_FREG4_ENABLE_CLK_SET BIT(22) +#define O2_SD_PHASE_MASK GENMASK(23, 20) +#define O2_SD_FIX_PHASE FIELD_PREP(O2_SD_PHASE_MASK, 0x9) #define O2_SD_VENDOR_SETTING 0x110 #define O2_SD_VENDOR_SETTING2 0x1C8 @@ -301,9 +306,13 @@ static int sdhci_o2_dll_recovery(struct sdhci_host *host) static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_pci_slot *slot = sdhci_priv(host); + struct sdhci_pci_chip *chip = slot->chip; int current_bus_width = 0; u32 scratch32 = 0; u16 scratch = 0; + u8 scratch_8 = 0; + u32 reg_val; /* * This handler only implements the eMMC tuning that is specific to @@ -322,6 +331,32 @@ static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode) scratch |= O2_SD_PWR_FORCE_L0; sdhci_writew(host, scratch, O2_SD_MISC_CTRL); + /* Stop clk */ + reg_val = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + reg_val &= ~SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, reg_val, SDHCI_CLOCK_CONTROL); + + /* UnLock WP */ + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8); + scratch_8 &= 0x7f; + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8); + + /* Set pcr 0x354[16] to choose dll clock, and set the default phase */ + pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, ®_val); + reg_val &= ~(O2_SD_SEL_DLL | O2_SD_PHASE_MASK); + reg_val |= (O2_SD_SEL_DLL | O2_SD_FIX_PHASE); + pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, reg_val); + + /* Lock WP */ + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch_8); + scratch_8 |= 0x80; + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch_8); + + /* Start clk */ + reg_val = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + reg_val |= SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, reg_val, SDHCI_CLOCK_CONTROL); + /* wait DLL lock, timeout value 5ms */ if (readx_poll_timeout(sdhci_o2_pll_dll_wdt_control, host, scratch32, (scratch32 & O2_DLL_LOCK_STATUS), 1, 5000)) @@ -533,22 +568,26 @@ static void sdhci_pci_o2_set_clock(struct sdhci_host *host, unsigned int clock) if (clock == 0) return; - if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) { - pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); - - scratch &= 0x7f; - pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); + /* UnLock WP */ + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); + scratch &= 0x7f; + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); + if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) { pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32); if ((scratch_32 & 0xFFFF0000) != 0x2c280000) o2_pci_set_baseclk(chip, 0x2c280000); + } - pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); + pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32); + scratch_32 &= ~(O2_SD_SEL_DLL | O2_SD_PHASE_MASK); + pci_write_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, scratch_32); - scratch |= 0x80; - pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); - } + /* Lock WP */ + pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch); + scratch |= 0x80; + pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch); clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock); sdhci_o2_enable_clk(host, clk);