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mmc: sdhci-pci-o2micro: Move functions in preparation to fix DLL lock phase shift issue 

Move functions in preparation to fix DLL lock phase shift issue

Signed-off-by: Shirley Her <shirley.her@bayhubtech.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shirley Her (SC) 2019-08-29 17:40:57 +00:00 committed by Ulf Hansson
parent 9674bab490
commit 908fd50813
1 changed files with 94 additions and 93 deletions
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187
drivers/mmc/host/sdhci-pci-o2micro.c
View File

@ -58,6 +58,100 @@
#define O2_SD_DETECT_SETTING 0x324
static void sdhci_o2_wait_card_detect_stable(struct sdhci_host *host)
{
ktime_t timeout;
u32 scratch32;
/* Wait max 50 ms */
timeout = ktime_add_ms(ktime_get(), 50);
while (1) {
bool timedout = ktime_after(ktime_get(), timeout);
scratch32 = sdhci_readl(host, SDHCI_PRESENT_STATE);
if ((scratch32 & SDHCI_CARD_PRESENT) >> SDHCI_CARD_PRES_SHIFT
== (scratch32 & SDHCI_CD_LVL) >> SDHCI_CD_LVL_SHIFT)
break;
if (timedout) {
pr_err("%s: Card Detect debounce never finished.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
return;
}
udelay(10);
}
}
static void sdhci_o2_enable_internal_clock(struct sdhci_host *host)
{
ktime_t timeout;
u16 scratch;
u32 scratch32;
/* PLL software reset */
scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
scratch32 |= O2_PLL_SOFT_RESET;
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
udelay(1);
scratch32 &= ~(O2_PLL_SOFT_RESET);
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
/* PLL force active */
scratch32 |= O2_PLL_FORCE_ACTIVE;
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
/* Wait max 20 ms */
timeout = ktime_add_ms(ktime_get(), 20);
while (1) {
bool timedout = ktime_after(ktime_get(), timeout);
scratch = sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1);
if (scratch & O2_PLL_LOCK_STATUS)
break;
if (timedout) {
pr_err("%s: Internal clock never stabilised.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
goto out;
}
udelay(10);
}
/* Wait for card detect finish */
udelay(1);
sdhci_o2_wait_card_detect_stable(host);
out:
/* Cancel PLL force active */
scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
scratch32 &= ~O2_PLL_FORCE_ACTIVE;
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
}
static int sdhci_o2_get_cd(struct mmc_host *mmc)
{
struct sdhci_host *host = mmc_priv(mmc);
sdhci_o2_enable_internal_clock(host);
return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
}
static void o2_pci_set_baseclk(struct sdhci_pci_chip *chip, u32 value)
{
u32 scratch_32;
pci_read_config_dword(chip->pdev,
O2_SD_PLL_SETTING, &scratch_32);
scratch_32 &= 0x0000FFFF;
scratch_32 |= value;
pci_write_config_dword(chip->pdev,
O2_SD_PLL_SETTING, scratch_32);
}
static void sdhci_o2_set_tuning_mode(struct sdhci_host *host)
{
u16 reg;
@ -136,19 +230,6 @@ static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode)
return 0;
}
static void o2_pci_set_baseclk(struct sdhci_pci_chip *chip, u32 value)
{
u32 scratch_32;
pci_read_config_dword(chip->pdev,
O2_SD_PLL_SETTING, &scratch_32);
scratch_32 &= 0x0000FFFF;
scratch_32 |= value;
pci_write_config_dword(chip->pdev,
O2_SD_PLL_SETTING, scratch_32);
}
static void o2_pci_led_enable(struct sdhci_pci_chip *chip)
{
int ret;
@ -284,86 +365,6 @@ static void sdhci_pci_o2_enable_msi(struct sdhci_pci_chip *chip,
host->irq = pci_irq_vector(chip->pdev, 0);
}
static void sdhci_o2_wait_card_detect_stable(struct sdhci_host *host)
{
ktime_t timeout;
u32 scratch32;
/* Wait max 50 ms */
timeout = ktime_add_ms(ktime_get(), 50);
while (1) {
bool timedout = ktime_after(ktime_get(), timeout);
scratch32 = sdhci_readl(host, SDHCI_PRESENT_STATE);
if ((scratch32 & SDHCI_CARD_PRESENT) >> SDHCI_CARD_PRES_SHIFT
== (scratch32 & SDHCI_CD_LVL) >> SDHCI_CD_LVL_SHIFT)
break;
if (timedout) {
pr_err("%s: Card Detect debounce never finished.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
return;
}
udelay(10);
}
}
static void sdhci_o2_enable_internal_clock(struct sdhci_host *host)
{
ktime_t timeout;
u16 scratch;
u32 scratch32;
/* PLL software reset */
scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
scratch32 |= O2_PLL_SOFT_RESET;
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
udelay(1);
scratch32 &= ~(O2_PLL_SOFT_RESET);
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
/* PLL force active */
scratch32 |= O2_PLL_FORCE_ACTIVE;
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
/* Wait max 20 ms */
timeout = ktime_add_ms(ktime_get(), 20);
while (1) {
bool timedout = ktime_after(ktime_get(), timeout);
scratch = sdhci_readw(host, O2_PLL_DLL_WDT_CONTROL1);
if (scratch & O2_PLL_LOCK_STATUS)
break;
if (timedout) {
pr_err("%s: Internal clock never stabilised.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
goto out;
}
udelay(10);
}
/* Wait for card detect finish */
udelay(1);
sdhci_o2_wait_card_detect_stable(host);
out:
/* Cancel PLL force active */
scratch32 = sdhci_readl(host, O2_PLL_DLL_WDT_CONTROL1);
scratch32 &= ~O2_PLL_FORCE_ACTIVE;
sdhci_writel(host, scratch32, O2_PLL_DLL_WDT_CONTROL1);
}
static int sdhci_o2_get_cd(struct mmc_host *mmc)
{
struct sdhci_host *host = mmc_priv(mmc);
sdhci_o2_enable_internal_clock(host);
return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
}
static void sdhci_o2_enable_clk(struct sdhci_host *host, u16 clk)
{
/* Enable internal clock */