#define VENDOR_V_22 0x12
#define VENDOR_V_23 0x13
-static u32 esdhc_readl(struct sdhci_host *host, int reg)
+
+struct sdhci_esdhc {
+ u8 vendor_ver;
+ u8 spec_ver;
+};
+
+/**
+ * esdhc_read*_fixup - Fixup the value read from incompatible eSDHC register
+ * to make it compatible with SD spec.
+ *
+ * @host: pointer to sdhci_host
+ * @spec_reg: SD spec register address
+ * @value: 32bit eSDHC register value on spec_reg address
+ *
+ * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
+ * registers are 32 bits. There are differences in register size, register
+ * address, register function, bit position and function between eSDHC spec
+ * and SD spec.
+ *
+ * Return a fixed up register value
+ */
+static u32 esdhc_readl_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value)
{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = pltfm_host->priv;
u32 ret;
- ret = in_be32(host->ioaddr + reg);
/*
* The bit of ADMA flag in eSDHC is not compatible with standard
* SDHC register, so set fake flag SDHCI_CAN_DO_ADMA2 when ADMA is
* supported by eSDHC.
* And for many FSL eSDHC controller, the reset value of field
- * SDHCI_CAN_DO_ADMA1 is one, but some of them can't support ADMA,
+ * SDHCI_CAN_DO_ADMA1 is 1, but some of them can't support ADMA,
* only these vendor version is greater than 2.2/0x12 support ADMA.
- * For FSL eSDHC, must aligned 4-byte, so use 0xFC to read the
- * the verdor version number, oxFE is SDHCI_HOST_VERSION.
*/
- if ((reg == SDHCI_CAPABILITIES) && (ret & SDHCI_CAN_DO_ADMA1)) {
- u32 tmp = in_be32(host->ioaddr + SDHCI_SLOT_INT_STATUS);
- tmp = (tmp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
- if (tmp > VENDOR_V_22)
- ret |= SDHCI_CAN_DO_ADMA2;
+ if ((spec_reg == SDHCI_CAPABILITIES) && (value & SDHCI_CAN_DO_ADMA1)) {
+ if (esdhc->vendor_ver > VENDOR_V_22) {
+ ret = value | SDHCI_CAN_DO_ADMA2;
+ return ret;
+ }
}
-
+ ret = value;
return ret;
}
-static u16 esdhc_readw(struct sdhci_host *host, int reg)
+static u16 esdhc_readw_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value)
{
u16 ret;
- int base = reg & ~0x3;
- int shift = (reg & 0x2) * 8;
+ int shift = (spec_reg & 0x2) * 8;
- if (unlikely(reg == SDHCI_HOST_VERSION))
- ret = in_be32(host->ioaddr + base) & 0xffff;
+ if (spec_reg == SDHCI_HOST_VERSION)
+ ret = value & 0xffff;
else
- ret = (in_be32(host->ioaddr + base) >> shift) & 0xffff;
+ ret = (value >> shift) & 0xffff;
return ret;
}
-static u8 esdhc_readb(struct sdhci_host *host, int reg)
+static u8 esdhc_readb_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value)
{
- int base = reg & ~0x3;
- int shift = (reg & 0x3) * 8;
- u8 ret = (in_be32(host->ioaddr + base) >> shift) & 0xff;
+ u8 ret;
+ u8 dma_bits;
+ int shift = (spec_reg & 0x3) * 8;
+
+ ret = (value >> shift) & 0xff;
/*
* "DMA select" locates at offset 0x28 in SD specification, but on
* P5020 or P3041, it locates at 0x29.
*/
- if (reg == SDHCI_HOST_CONTROL) {
- u32 dma_bits;
-
- dma_bits = in_be32(host->ioaddr + reg);
+ if (spec_reg == SDHCI_HOST_CONTROL) {
/* DMA select is 22,23 bits in Protocol Control Register */
- dma_bits = (dma_bits >> 5) & SDHCI_CTRL_DMA_MASK;
-
+ dma_bits = (value >> 5) & SDHCI_CTRL_DMA_MASK;
/* fixup the result */
ret &= ~SDHCI_CTRL_DMA_MASK;
ret |= dma_bits;
}
-
return ret;
}
-static void esdhc_writel(struct sdhci_host *host, u32 val, int reg)
+/**
+ * esdhc_write*_fixup - Fixup the SD spec register value so that it could be
+ * written into eSDHC register.
+ *
+ * @host: pointer to sdhci_host
+ * @spec_reg: SD spec register address
+ * @value: 8/16/32bit SD spec register value that would be written
+ * @old_value: 32bit eSDHC register value on spec_reg address
+ *
+ * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
+ * registers are 32 bits. There are differences in register size, register
+ * address, register function, bit position and function between eSDHC spec
+ * and SD spec.
+ *
+ * Return a fixed up register value
+ */
+static u32 esdhc_writel_fixup(struct sdhci_host *host,
+ int spec_reg, u32 value, u32 old_value)
{
+ u32 ret;
+
/*
- * Enable IRQSTATEN[BGESEN] is just to set IRQSTAT[BGE]
- * when SYSCTL[RSTD]) is set for some special operations.
- * No any impact other operation.
+ * Enabling IRQSTATEN[BGESEN] is just to set IRQSTAT[BGE]
+ * when SYSCTL[RSTD] is set for some special operations.
+ * No any impact on other operation.
*/
- if (reg == SDHCI_INT_ENABLE)
- val |= SDHCI_INT_BLK_GAP;
- sdhci_be32bs_writel(host, val, reg);
+ if (spec_reg == SDHCI_INT_ENABLE)
+ ret = value | SDHCI_INT_BLK_GAP;
+ else
+ ret = value;
+
+ return ret;
}
-static void esdhc_writew(struct sdhci_host *host, u16 val, int reg)
+static u32 esdhc_writew_fixup(struct sdhci_host *host,
+ int spec_reg, u16 value, u32 old_value)
{
- if (reg == SDHCI_BLOCK_SIZE) {
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ int shift = (spec_reg & 0x2) * 8;
+ u32 ret;
+
+ switch (spec_reg) {
+ case SDHCI_TRANSFER_MODE:
+ /*
+ * Postpone this write, we must do it together with a
+ * command write that is down below. Return old value.
+ */
+ pltfm_host->xfer_mode_shadow = value;
+ return old_value;
+ case SDHCI_COMMAND:
+ ret = (value << 16) | pltfm_host->xfer_mode_shadow;
+ return ret;
+ }
+
+ ret = old_value & (~(0xffff << shift));
+ ret |= (value << shift);
+
+ if (spec_reg == SDHCI_BLOCK_SIZE) {
/*
* Two last DMA bits are reserved, and first one is used for
* non-standard blksz of 4096 bytes that we don't support
* yet. So clear the DMA boundary bits.
*/
- val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
+ ret &= (~SDHCI_MAKE_BLKSZ(0x7, 0));
}
- sdhci_be32bs_writew(host, val, reg);
+ return ret;
}
-static void esdhc_writeb(struct sdhci_host *host, u8 val, int reg)
+static u32 esdhc_writeb_fixup(struct sdhci_host *host,
+ int spec_reg, u8 value, u32 old_value)
{
+ u32 ret;
+ u32 dma_bits;
+ u8 tmp;
+ int shift = (spec_reg & 0x3) * 8;
+
/*
* "DMA select" location is offset 0x28 in SD specification, but on
* P5020 or P3041, it's located at 0x29.
*/
- if (reg == SDHCI_HOST_CONTROL) {
- u32 dma_bits;
-
+ if (spec_reg == SDHCI_HOST_CONTROL) {
/*
* If host control register is not standard, exit
* this function
*/
if (host->quirks2 & SDHCI_QUIRK2_BROKEN_HOST_CONTROL)
- return;
+ return old_value;
/* DMA select is 22,23 bits in Protocol Control Register */
- dma_bits = (val & SDHCI_CTRL_DMA_MASK) << 5;
- clrsetbits_be32(host->ioaddr + reg , SDHCI_CTRL_DMA_MASK << 5,
- dma_bits);
- val &= ~SDHCI_CTRL_DMA_MASK;
- val |= in_be32(host->ioaddr + reg) & SDHCI_CTRL_DMA_MASK;
+ dma_bits = (value & SDHCI_CTRL_DMA_MASK) << 5;
+ ret = (old_value & (~(SDHCI_CTRL_DMA_MASK << 5))) | dma_bits;
+ tmp = (value & (~SDHCI_CTRL_DMA_MASK)) |
+ (old_value & SDHCI_CTRL_DMA_MASK);
+ ret = (ret & (~0xff)) | tmp;
+
+ /* Prevent SDHCI core from writing reserved bits (e.g. HISPD) */
+ ret &= ~ESDHC_HOST_CONTROL_RES;
+ return ret;
}
- /* Prevent SDHCI core from writing reserved bits (e.g. HISPD). */
- if (reg == SDHCI_HOST_CONTROL)
- val &= ~ESDHC_HOST_CONTROL_RES;
- sdhci_be32bs_writeb(host, val, reg);
+ ret = (old_value & (~(0xff << shift))) | (value << shift);
+ return ret;
+}
+
+static u32 esdhc_be_readl(struct sdhci_host *host, int reg)
+{
+ u32 ret;
+ u32 value;
+
+ value = ioread32be(host->ioaddr + reg);
+ ret = esdhc_readl_fixup(host, reg, value);
+
+ return ret;
+}
+
+static u32 esdhc_le_readl(struct sdhci_host *host, int reg)
+{
+ u32 ret;
+ u32 value;
+
+ value = ioread32(host->ioaddr + reg);
+ ret = esdhc_readl_fixup(host, reg, value);
+
+ return ret;
+}
+
+static u16 esdhc_be_readw(struct sdhci_host *host, int reg)
+{
+ u16 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_readw_fixup(host, reg, value);
+ return ret;
+}
+
+static u16 esdhc_le_readw(struct sdhci_host *host, int reg)
+{
+ u16 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_readw_fixup(host, reg, value);
+ return ret;
+}
+
+static u8 esdhc_be_readb(struct sdhci_host *host, int reg)
+{
+ u8 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_readb_fixup(host, reg, value);
+ return ret;
+}
+
+static u8 esdhc_le_readb(struct sdhci_host *host, int reg)
+{
+ u8 ret;
+ u32 value;
+ int base = reg & ~0x3;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_readb_fixup(host, reg, value);
+ return ret;
+}
+
+static void esdhc_be_writel(struct sdhci_host *host, u32 val, int reg)
+{
+ u32 value;
+
+ value = esdhc_writel_fixup(host, reg, val, 0);
+ iowrite32be(value, host->ioaddr + reg);
+}
+
+static void esdhc_le_writel(struct sdhci_host *host, u32 val, int reg)
+{
+ u32 value;
+
+ value = esdhc_writel_fixup(host, reg, val, 0);
+ iowrite32(value, host->ioaddr + reg);
+}
+
+static void esdhc_be_writew(struct sdhci_host *host, u16 val, int reg)
+{
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_writew_fixup(host, reg, val, value);
+ if (reg != SDHCI_TRANSFER_MODE)
+ iowrite32be(ret, host->ioaddr + base);
+}
+
+static void esdhc_le_writew(struct sdhci_host *host, u16 val, int reg)
+{
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_writew_fixup(host, reg, val, value);
+ if (reg != SDHCI_TRANSFER_MODE)
+ iowrite32(ret, host->ioaddr + base);
+}
+
+static void esdhc_be_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32be(host->ioaddr + base);
+ ret = esdhc_writeb_fixup(host, reg, val, value);
+ iowrite32be(ret, host->ioaddr + base);
+}
+
+static void esdhc_le_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+ int base = reg & ~0x3;
+ u32 value;
+ u32 ret;
+
+ value = ioread32(host->ioaddr + base);
+ ret = esdhc_writeb_fixup(host, reg, val, value);
+ iowrite32(ret, host->ioaddr + base);
}
/*
* For Continue, apply soft reset for data(SYSCTL[RSTD]);
* and re-issue the entire read transaction from beginning.
*/
-static void esdhci_of_adma_workaround(struct sdhci_host *host, u32 intmask)
+static void esdhc_of_adma_workaround(struct sdhci_host *host, u32 intmask)
{
- u32 tmp;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = pltfm_host->priv;
bool applicable;
dma_addr_t dmastart;
dma_addr_t dmanow;
- tmp = in_be32(host->ioaddr + SDHCI_SLOT_INT_STATUS);
- tmp = (tmp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
-
applicable = (intmask & SDHCI_INT_DATA_END) &&
- (intmask & SDHCI_INT_BLK_GAP) &&
- (tmp == VENDOR_V_23);
+ (intmask & SDHCI_INT_BLK_GAP) &&
+ (esdhc->vendor_ver == VENDOR_V_23);
if (!applicable)
return;
static int esdhc_of_enable_dma(struct sdhci_host *host)
{
- setbits32(host->ioaddr + ESDHC_DMA_SYSCTL, ESDHC_DMA_SNOOP);
+ u32 value;
+
+ value = sdhci_readl(host, ESDHC_DMA_SYSCTL);
+ value |= ESDHC_DMA_SNOOP;
+ sdhci_writel(host, value, ESDHC_DMA_SYSCTL);
return 0;
}
static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_esdhc *esdhc = pltfm_host->priv;
int pre_div = 1;
int div = 1;
u32 temp;
return;
/* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */
- temp = esdhc_readw(host, SDHCI_HOST_VERSION);
- temp = (temp & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
- if (temp < VENDOR_V_23)
+ if (esdhc->vendor_ver < VENDOR_V_23)
pre_div = 2;
/* Workaround to reduce the clock frequency for p1010 esdhc */
mdelay(1);
}
-static void esdhc_of_platform_init(struct sdhci_host *host)
-{
- u32 vvn;
-
- vvn = in_be32(host->ioaddr + SDHCI_SLOT_INT_STATUS);
- vvn = (vvn & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT;
- if (vvn == VENDOR_V_22)
- host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;
-
- if (vvn > VENDOR_V_22)
- host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;
-}
-
static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
{
u32 ctrl;
+ ctrl = sdhci_readl(host, ESDHC_PROCTL);
+ ctrl &= (~ESDHC_CTRL_BUSWIDTH_MASK);
switch (width) {
case MMC_BUS_WIDTH_8:
- ctrl = ESDHC_CTRL_8BITBUS;
+ ctrl |= ESDHC_CTRL_8BITBUS;
break;
case MMC_BUS_WIDTH_4:
- ctrl = ESDHC_CTRL_4BITBUS;
+ ctrl |= ESDHC_CTRL_4BITBUS;
break;
default:
- ctrl = 0;
break;
}
- clrsetbits_be32(host->ioaddr + SDHCI_HOST_CONTROL,
- ESDHC_CTRL_BUSWIDTH_MASK, ctrl);
+ sdhci_writel(host, ctrl, ESDHC_PROCTL);
}
static void esdhc_reset(struct sdhci_host *host, u8 mask)
sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
}
-static const struct sdhci_ops sdhci_esdhc_ops = {
- .read_l = esdhc_readl,
- .read_w = esdhc_readw,
- .read_b = esdhc_readb,
- .write_l = esdhc_writel,
- .write_w = esdhc_writew,
- .write_b = esdhc_writeb,
- .set_clock = esdhc_of_set_clock,
- .enable_dma = esdhc_of_enable_dma,
- .get_max_clock = esdhc_of_get_max_clock,
- .get_min_clock = esdhc_of_get_min_clock,
- .platform_init = esdhc_of_platform_init,
- .adma_workaround = esdhci_of_adma_workaround,
- .set_bus_width = esdhc_pltfm_set_bus_width,
- .reset = esdhc_reset,
- .set_uhs_signaling = sdhci_set_uhs_signaling,
-};
-
#ifdef CONFIG_PM
-
static u32 esdhc_proctl;
static int esdhc_of_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
- esdhc_proctl = sdhci_be32bs_readl(host, SDHCI_HOST_CONTROL);
+ esdhc_proctl = sdhci_readl(host, SDHCI_HOST_CONTROL);
return sdhci_suspend_host(host);
}
if (ret == 0) {
/* Isn't this already done by sdhci_resume_host() ? --rmk */
esdhc_of_enable_dma(host);
- sdhci_be32bs_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
+ sdhci_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
}
-
return ret;
}
#define ESDHC_PMOPS NULL
#endif
-static const struct sdhci_pltfm_data sdhci_esdhc_pdata = {
- /*
- * card detection could be handled via GPIO
- * eSDHC cannot support End Attribute in NOP ADMA descriptor
- */
+static const struct sdhci_ops sdhci_esdhc_be_ops = {
+ .read_l = esdhc_be_readl,
+ .read_w = esdhc_be_readw,
+ .read_b = esdhc_be_readb,
+ .write_l = esdhc_be_writel,
+ .write_w = esdhc_be_writew,
+ .write_b = esdhc_be_writeb,
+ .set_clock = esdhc_of_set_clock,
+ .enable_dma = esdhc_of_enable_dma,
+ .get_max_clock = esdhc_of_get_max_clock,
+ .get_min_clock = esdhc_of_get_min_clock,
+ .adma_workaround = esdhc_of_adma_workaround,
+ .set_bus_width = esdhc_pltfm_set_bus_width,
+ .reset = esdhc_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_ops sdhci_esdhc_le_ops = {
+ .read_l = esdhc_le_readl,
+ .read_w = esdhc_le_readw,
+ .read_b = esdhc_le_readb,
+ .write_l = esdhc_le_writel,
+ .write_w = esdhc_le_writew,
+ .write_b = esdhc_le_writeb,
+ .set_clock = esdhc_of_set_clock,
+ .enable_dma = esdhc_of_enable_dma,
+ .get_max_clock = esdhc_of_get_max_clock,
+ .get_min_clock = esdhc_of_get_min_clock,
+ .adma_workaround = esdhc_of_adma_workaround,
+ .set_bus_width = esdhc_pltfm_set_bus_width,
+ .reset = esdhc_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
+ .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
+ | SDHCI_QUIRK_NO_CARD_NO_RESET
+ | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .ops = &sdhci_esdhc_be_ops,
+};
+
+static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = {
.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
| SDHCI_QUIRK_NO_CARD_NO_RESET
| SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
- .ops = &sdhci_esdhc_ops,
+ .ops = &sdhci_esdhc_le_ops,
};
+static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_esdhc *esdhc;
+ u16 host_ver;
+
+ pltfm_host = sdhci_priv(host);
+ esdhc = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_esdhc),
+ GFP_KERNEL);
+
+ host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
+ esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
+ SDHCI_VENDOR_VER_SHIFT;
+ esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK;
+
+ pltfm_host->priv = esdhc;
+}
+
static int sdhci_esdhc_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
struct device_node *np;
int ret;
- host = sdhci_pltfm_init(pdev, &sdhci_esdhc_pdata, 0);
+ np = pdev->dev.of_node;
+
+ if (of_get_property(np, "little-endian", NULL))
+ host = sdhci_pltfm_init(pdev, &sdhci_esdhc_le_pdata, 0);
+ else
+ host = sdhci_pltfm_init(pdev, &sdhci_esdhc_be_pdata, 0);
+
if (IS_ERR(host))
return PTR_ERR(host);
+ esdhc_init(pdev, host);
+
sdhci_get_of_property(pdev);
- np = pdev->dev.of_node;
if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
of_device_is_compatible(np, "fsl,p5020-esdhc") ||
of_device_is_compatible(np, "fsl,p4080-esdhc") ||
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff