The s3c_hsotg_core_init function has been added to exclude
code responsible for Samsung's SoCs USB core initialization.
Signed-off-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/usb/gadget/s3c-hsotg.c | 334 +++++++++++++++++++++-------------------
1 files changed, 173 insertions(+), 161 deletions(-)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 0a74a06..8d86528 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2139,6 +2139,178 @@ static struct s3c_hsotg *our_hsotg;
S3C_GINTSTS_RxFLvl)
/**
+ * s3c_hsotg_corereset - issue softreset to the core
+ * @hsotg: The device state
+ *
+ * Issue a soft reset to the core, and await the core finishing it.
+*/
+static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
+{
+ int timeout;
+ u32 grstctl;
+
+ dev_dbg(hsotg->dev, "resetting core\n");
+
+ /* issue soft reset */
+ writel(S3C_GRSTCTL_CSftRst, hsotg->regs + S3C_GRSTCTL);
+
+ timeout = 1000;
+ do {
+ grstctl = readl(hsotg->regs + S3C_GRSTCTL);
+ } while ((grstctl & S3C_GRSTCTL_CSftRst) && timeout-- > 0);
+
+ if (grstctl & S3C_GRSTCTL_CSftRst) {
+ dev_err(hsotg->dev, "Failed to get CSftRst asserted\n");
+ return -EINVAL;
+ }
+
+ timeout = 1000;
+
+ while (1) {
+ u32 grstctl = readl(hsotg->regs + S3C_GRSTCTL);
+
+ if (timeout-- < 0) {
+ dev_info(hsotg->dev,
+ "%s: reset failed, GRSTCTL=%08x\n",
+ __func__, grstctl);
+ return -ETIMEDOUT;
+ }
+
+ if (!(grstctl & S3C_GRSTCTL_AHBIdle))
+ continue;
+
+ break; /* reset done */
+ }
+
+ dev_dbg(hsotg->dev, "reset successful\n");
+ return 0;
+}
+
+static void s3c_hsotg_core_init(struct s3c_hsotg *hsotg)
+{
+ s3c_hsotg_corereset(hsotg);
+
+ /*
+ * we must now enable ep0 ready for host detection and then
+ * set configuration.
+ */
+
+ /* set the PLL on, remove the HNP/SRP and set the PHY */
+ writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) |
+ (0x5 << 10), hsotg->regs + S3C_GUSBCFG);
+
+ s3c_hsotg_init_fifo(hsotg);
+
+ __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
+
+ writel(1 << 18 | S3C_DCFG_DevSpd_HS, hsotg->regs + S3C_DCFG);
+
+ /* Clear any pending OTG interrupts */
+ writel(0xffffffff, hsotg->regs + S3C_GOTGINT);
+
+ /* Clear any pending interrupts */
+ writel(0xffffffff, hsotg->regs + S3C_GINTSTS);
+
+ writel(S3C_GINTSTS_DisconnInt | S3C_GINTSTS_SessReqInt |
+ S3C_GINTSTS_GOUTNakEff | S3C_GINTSTS_GINNakEff |
+ S3C_GINTSTS_ConIDStsChng | S3C_GINTSTS_USBRst |
+ S3C_GINTSTS_EnumDone | S3C_GINTSTS_OTGInt |
+ S3C_GINTSTS_USBSusp | S3C_GINTSTS_WkUpInt |
+ S3C_GINTSTS_ErlySusp,
+ hsotg->regs + S3C_GINTMSK);
+
+ if (using_dma(hsotg))
+ writel(S3C_GAHBCFG_GlblIntrEn | S3C_GAHBCFG_DMAEn |
+ S3C_GAHBCFG_HBstLen_Incr4,
+ hsotg->regs + S3C_GAHBCFG);
+ else
+ writel(S3C_GAHBCFG_GlblIntrEn, hsotg->regs + S3C_GAHBCFG);
+
+ /*
+ * Enabling INTknTXFEmpMsk here seems to be a big mistake, we end
+ * up being flooded with interrupts if the host is polling the
+ * endpoint to try and read data.
+ */
+
+ writel(((hsotg->dedicated_fifos) ? S3C_DIEPMSK_TxFIFOEmpty : 0) |
+ S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk |
+ S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk |
+ S3C_DIEPMSK_INTknEPMisMsk,
+ hsotg->regs + S3C_DIEPMSK);
+
+ /*
+ * don't need XferCompl, we get that from RXFIFO in slave mode. In
+ * DMA mode we may need this.
+ */
+ writel((using_dma(hsotg) ? (S3C_DIEPMSK_XferComplMsk |
+ S3C_DIEPMSK_TimeOUTMsk) : 0) |
+ S3C_DOEPMSK_EPDisbldMsk | S3C_DOEPMSK_AHBErrMsk |
+ S3C_DOEPMSK_SetupMsk,
+ hsotg->regs + S3C_DOEPMSK);
+
+ writel(0, hsotg->regs + S3C_DAINTMSK);
+
+ dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+ readl(hsotg->regs + S3C_DIEPCTL0),
+ readl(hsotg->regs + S3C_DOEPCTL0));
+
+ /* enable in and out endpoint interrupts */
+ s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_OEPInt | S3C_GINTSTS_IEPInt);
+
+ /*
+ * Enable the RXFIFO when in slave mode, as this is how we collect
+ * the data. In DMA mode, we get events from the FIFO but also
+ * things we cannot process, so do not use it.
+ */
+ if (!using_dma(hsotg))
+ s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_RxFLvl);
+
+ /* Enable interrupts for EP0 in and out */
+ s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1);
+ s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1);
+
+ __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone);
+ udelay(10); /* see openiboot */
+ __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone);
+
+ dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + S3C_DCTL));
+
+ /*
+ * S3C_DxEPCTL_USBActEp says RO in manual, but seems to be set by
+ * writing to the EPCTL register..
+ */
+
+ /* set to read 1 8byte packet */
+ writel(S3C_DxEPTSIZ_MC(1) | S3C_DxEPTSIZ_PktCnt(1) |
+ S3C_DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0);
+
+ writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
+ S3C_DxEPCTL_CNAK | S3C_DxEPCTL_EPEna |
+ S3C_DxEPCTL_USBActEp,
+ hsotg->regs + S3C_DOEPCTL0);
+
+ /* enable, but don't activate EP0in */
+ writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
+ S3C_DxEPCTL_USBActEp, hsotg->regs + S3C_DIEPCTL0);
+
+ s3c_hsotg_enqueue_setup(hsotg);
+
+ dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+ readl(hsotg->regs + S3C_DIEPCTL0),
+ readl(hsotg->regs + S3C_DOEPCTL0));
+
+ /* clear global NAKs */
+ writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK,
+ hsotg->regs + S3C_DCTL);
+
+ /* must be at-least 3ms to allow bus to see disconnect */
+ mdelay(3);
+
+ /* remove the soft-disconnect and let's go */
+ __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
+}
+
+/**
* s3c_hsotg_irq - handle device interrupt
* @irq: The IRQ number triggered
* @pw: The pw value when registered the handler.
@@ -2579,54 +2751,6 @@ static struct usb_ep_ops s3c_hsotg_ep_ops = {
};
/**
- * s3c_hsotg_corereset - issue softreset to the core
- * @hsotg: The device state
- *
- * Issue a soft reset to the core, and await the core finishing it.
-*/
-static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
-{
- int timeout;
- u32 grstctl;
-
- dev_dbg(hsotg->dev, "resetting core\n");
-
- /* issue soft reset */
- writel(S3C_GRSTCTL_CSftRst, hsotg->regs + S3C_GRSTCTL);
-
- timeout = 1000;
- do {
- grstctl = readl(hsotg->regs + S3C_GRSTCTL);
- } while ((grstctl & S3C_GRSTCTL_CSftRst) && timeout-- > 0);
-
- if (grstctl & S3C_GRSTCTL_CSftRst) {
- dev_err(hsotg->dev, "Failed to get CSftRst asserted\n");
- return -EINVAL;
- }
-
- timeout = 1000;
-
- while (1) {
- u32 grstctl = readl(hsotg->regs + S3C_GRSTCTL);
-
- if (timeout-- < 0) {
- dev_info(hsotg->dev,
- "%s: reset failed, GRSTCTL=%08x\n",
- __func__, grstctl);
- return -ETIMEDOUT;
- }
-
- if (!(grstctl & S3C_GRSTCTL_AHBIdle))
- continue;
-
- break; /* reset done */
- }
-
- dev_dbg(hsotg->dev, "reset successful\n");
- return 0;
-}
-
-/**
* s3c_hsotg_phy_enable - enable platform phy dev
*
* @param: The driver state
@@ -2706,119 +2830,7 @@ static int s3c_hsotg_start(struct usb_gadget_driver *driver,
goto err;
}
- /* we must now enable ep0 ready for host detection and then
- * set configuration. */
-
- s3c_hsotg_corereset(hsotg);
-
- /* set the PLL on, remove the HNP/SRP and set the PHY */
- writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) |
- (0x5 << 10), hsotg->regs + S3C_GUSBCFG);
-
- /* looks like soft-reset changes state of FIFOs */
- s3c_hsotg_init_fifo(hsotg);
-
- __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
-
- writel(1 << 18 | S3C_DCFG_DevSpd_HS, hsotg->regs + S3C_DCFG);
-
- /* Clear any pending OTG interrupts */
- writel(0xffffffff, hsotg->regs + S3C_GOTGINT);
-
- /* Clear any pending interrupts */
- writel(0xffffffff, hsotg->regs + S3C_GINTSTS);
-
- writel(S3C_GINTSTS_DisconnInt | S3C_GINTSTS_SessReqInt |
- S3C_GINTSTS_ConIDStsChng | S3C_GINTSTS_USBRst |
- S3C_GINTSTS_EnumDone | S3C_GINTSTS_OTGInt |
- S3C_GINTSTS_USBSusp | S3C_GINTSTS_WkUpInt |
- S3C_GINTSTS_GOUTNakEff | S3C_GINTSTS_GINNakEff |
- S3C_GINTSTS_ErlySusp,
- hsotg->regs + S3C_GINTMSK);
-
- if (using_dma(hsotg))
- writel(S3C_GAHBCFG_GlblIntrEn | S3C_GAHBCFG_DMAEn |
- S3C_GAHBCFG_HBstLen_Incr4,
- hsotg->regs + S3C_GAHBCFG);
- else
- writel(S3C_GAHBCFG_GlblIntrEn, hsotg->regs + S3C_GAHBCFG);
-
- /* Enabling INTknTXFEmpMsk here seems to be a big mistake, we end
- * up being flooded with interrupts if the host is polling the
- * endpoint to try and read data. */
-
- writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk |
- S3C_DIEPMSK_INTknEPMisMsk |
- S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk |
- ((hsotg->dedicated_fifos) ? S3C_DIEPMSK_TxFIFOEmpty : 0),
- hsotg->regs + S3C_DIEPMSK);
-
- /* don't need XferCompl, we get that from RXFIFO in slave mode. In
- * DMA mode we may need this. */
- writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk |
- S3C_DOEPMSK_EPDisbldMsk |
- (using_dma(hsotg) ? (S3C_DIEPMSK_XferComplMsk |
- S3C_DIEPMSK_TimeOUTMsk) : 0),
- hsotg->regs + S3C_DOEPMSK);
-
- writel(0, hsotg->regs + S3C_DAINTMSK);
-
- dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
- readl(hsotg->regs + S3C_DIEPCTL0),
- readl(hsotg->regs + S3C_DOEPCTL0));
-
- /* enable in and out endpoint interrupts */
- s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_OEPInt | S3C_GINTSTS_IEPInt);
-
- /* Enable the RXFIFO when in slave mode, as this is how we collect
- * the data. In DMA mode, we get events from the FIFO but also
- * things we cannot process, so do not use it. */
- if (!using_dma(hsotg))
- s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_RxFLvl);
-
- /* Enable interrupts for EP0 in and out */
- s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1);
- s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1);
-
- __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone);
- udelay(10); /* see openiboot */
- __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone);
-
- dev_dbg(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + S3C_DCTL));
-
- /* S3C_DxEPCTL_USBActEp says RO in manual, but seems to be set by
- writing to the EPCTL register.. */
-
- /* set to read 1 8byte packet */
- writel(S3C_DxEPTSIZ_MC(1) | S3C_DxEPTSIZ_PktCnt(1) |
- S3C_DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0);
-
- writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
- S3C_DxEPCTL_CNAK | S3C_DxEPCTL_EPEna |
- S3C_DxEPCTL_USBActEp,
- hsotg->regs + S3C_DOEPCTL0);
-
- /* enable, but don't activate EP0in */
- writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) |
- S3C_DxEPCTL_USBActEp, hsotg->regs + S3C_DIEPCTL0);
-
- s3c_hsotg_enqueue_setup(hsotg);
-
- dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
- readl(hsotg->regs + S3C_DIEPCTL0),
- readl(hsotg->regs + S3C_DOEPCTL0));
-
- /* clear global NAKs */
- writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK,
- hsotg->regs + S3C_DCTL);
-
- /* must be at-least 3ms to allow bus to see disconnect */
- msleep(3);
-
- /* remove the soft-disconnect and let's go */
- __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
-
- /* report to the user, and return */
+ s3c_hsotg_core_init(hsotg);
dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name);
return 0;
--
1.7.2.3
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