fsl/usb: Workaround for USB erratum-A005275

Workaround makes FS as default mode on all affected socs.

Add support to check erratum-A005275 validity for an soc. This info is
required to determine whether a given soc is affected by this erratum.
Add quirk for this erratum "has_fsl_erratum_a005275" . This quirk is used
to enable workaround for the errata

Force FS mode as default by:
        - making EPS as FS
        - setting PFSC bit to disable HS chirping

This workaround can be disabled by mentioning "no_erratum_a005275" in
hwconfig string

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/powerpc/cpu/mpc85xx/Kconfig

@@ -659,6 +659,7 @@ config ARCH_P1010
 	select SYS_FSL_ERRATUM_A004477
 	select SYS_FSL_ERRATUM_A004508
 	select SYS_FSL_ERRATUM_A005125
+	select SYS_FSL_ERRATUM_A005275
 	select SYS_FSL_ERRATUM_A006261
 	select SYS_FSL_ERRATUM_A007075
 	select SYS_FSL_ERRATUM_ESDHC111
@@ -821,6 +822,7 @@ config ARCH_P2041
 	select FSL_LAW
 	select SYS_FSL_ERRATUM_A004510
 	select SYS_FSL_ERRATUM_A004849
+	select SYS_FSL_ERRATUM_A005275
 	select SYS_FSL_ERRATUM_A006261
 	select SYS_FSL_ERRATUM_CPU_A003999
 	select SYS_FSL_ERRATUM_DDR_A003
@@ -845,6 +847,7 @@ config ARCH_P3041
 	select SYS_FSL_DDR_VER_44
 	select SYS_FSL_ERRATUM_A004510
 	select SYS_FSL_ERRATUM_A004849
+	select SYS_FSL_ERRATUM_A005275
 	select SYS_FSL_ERRATUM_A005812
 	select SYS_FSL_ERRATUM_A006261
 	select SYS_FSL_ERRATUM_CPU_A003999
@@ -910,6 +913,7 @@ config ARCH_P5020
 	select FSL_LAW
 	select SYS_FSL_DDR_VER_44
 	select SYS_FSL_ERRATUM_A004510
+	select SYS_FSL_ERRATUM_A005275
 	select SYS_FSL_ERRATUM_A006261
 	select SYS_FSL_ERRATUM_DDR_A003
 	select SYS_FSL_ERRATUM_DDR_A003474
@@ -935,6 +939,7 @@ config ARCH_P5040
 	select SYS_FSL_DDR_VER_44
 	select SYS_FSL_ERRATUM_A004510
 	select SYS_FSL_ERRATUM_A004699
+	select SYS_FSL_ERRATUM_A005275
 	select SYS_FSL_ERRATUM_A005812
 	select SYS_FSL_ERRATUM_A006261
 	select SYS_FSL_ERRATUM_DDR_A003
@@ -1303,6 +1308,9 @@ config SYS_FSL_ERRATUM_A005812
 config SYS_FSL_ERRATUM_A005871
 	bool
 
+config SYS_FSL_ERRATUM_A005275
+	bool
+
 config SYS_FSL_ERRATUM_A006261
 	bool
 

arch/powerpc/cpu/mpc85xx/cmd_errata.c

@@ -307,6 +307,10 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	    (SVR_REV(svr) <= CONFIG_SYS_FSL_A004447_SVR_REV))
 		puts("Work-around for Erratum I2C-A004447 enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_A005275
+	if (has_erratum_a005275())
+		puts("Work-around for Erratum A005275 enabled\n");
+#endif
 #ifdef CONFIG_SYS_FSL_ERRATUM_A006261
 	if (has_erratum_a006261())
 		puts("Work-around for Erratum A006261 enabled\n");

drivers/usb/common/fsl-errata.c

@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <hwconfig.h>
 #include <fsl_errata.h>
 #include<fsl_usb.h>
 #if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \
@@ -44,6 +45,33 @@ bool has_dual_phy(void)
 	return false;
 }
 
+bool has_erratum_a005275(void)
+{
+	u32 svr = get_svr();
+	u32 soc = SVR_SOC_VER(svr);
+
+	if (hwconfig("no_erratum_a005275"))
+		return false;
+
+	switch (soc) {
+#ifdef CONFIG_PPC
+	case SVR_P3041:
+	case SVR_P2041:
+	case SVR_P2040:
+		return IS_SVR_REV(svr, 1, 0) || IS_SVR_REV(svr, 1, 1);
+	case SVR_P5010:
+	case SVR_P5020:
+	case SVR_P5021:
+		return IS_SVR_REV(svr, 1, 0) || IS_SVR_REV(svr, 2, 0);
+	case SVR_P5040:
+	case SVR_P1010:
+		return IS_SVR_REV(svr, 1, 0);
+#endif
+	}
+
+	return false;
+}
+
 bool has_erratum_a006261(void)
 {
 	u32 svr = get_svr();

drivers/usb/host/ehci-fsl.c

@@ -93,6 +93,7 @@ static int ehci_fsl_probe(struct udevice *dev)
 	struct usb_ehci *ehci = NULL;
 	struct ehci_hccr *hccr;
 	struct ehci_hcor *hcor;
+	struct ehci_ctrl *ehci_ctrl = &priv->ehci;
 
 	/*
 	 * Get the base address for EHCI controller from the device node
@@ -107,6 +108,8 @@ static int ehci_fsl_probe(struct udevice *dev)
 	hcor = (struct ehci_hcor *)
 		((void *)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
 
+	ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275();
+
 	if (ehci_fsl_init(priv, ehci, hccr, hcor) < 0)
 		return -ENXIO;
 
@@ -145,6 +148,8 @@ U_BOOT_DRIVER(ehci_fsl) = {
 int ehci_hcd_init(int index, enum usb_init_type init,
 		struct ehci_hccr **hccr, struct ehci_hcor **hcor)
 {
+	struct ehci_ctrl *ehci_ctrl = container_of(hccr,
+					struct ehci_ctrl, hccr);
 	struct usb_ehci *ehci = NULL;
 
 	switch (index) {
@@ -163,6 +168,8 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 	*hcor = (struct ehci_hcor *)((uint32_t) *hccr +
 			HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
 
+	ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275();
+
 	return ehci_fsl_init(index, ehci, *hccr, *hcor);
 }
 

drivers/usb/host/ehci-hcd.c

@@ -409,9 +409,15 @@ ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer,
 	endpt = QH_ENDPT1_RL(8) | QH_ENDPT1_C(c) |
 		QH_ENDPT1_MAXPKTLEN(maxpacket) | QH_ENDPT1_H(0) |
 		QH_ENDPT1_DTC(QH_ENDPT1_DTC_DT_FROM_QTD) |
-		QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
 		QH_ENDPT1_ENDPT(usb_pipeendpoint(pipe)) | QH_ENDPT1_I(0) |
 		QH_ENDPT1_DEVADDR(usb_pipedevice(pipe));
+
+	/* Force FS for fsl HS quirk */
+	if (!ctrl->has_fsl_erratum_a005275)
+		endpt |= QH_ENDPT1_EPS(ehci_encode_speed(dev->speed));
+	else
+		endpt |= QH_ENDPT1_EPS(ehci_encode_speed(QH_FULL_SPEED));
+
 	qh->qh_endpt1 = cpu_to_hc32(endpt);
 	endpt = QH_ENDPT2_MULT(1) | QH_ENDPT2_UFCMASK(0) | QH_ENDPT2_UFSMASK(0);
 	qh->qh_endpt2 = cpu_to_hc32(endpt);
@@ -832,6 +838,10 @@ static int ehci_submit_root(struct usb_device *dev, unsigned long pipe,
 			} else {
 				int ret;
 
+				/* Disable chirp for HS erratum */
+				if (ctrl->has_fsl_erratum_a005275)
+					reg |= PORTSC_FSL_PFSC;
+
 				reg |= EHCI_PS_PR;
 				reg &= ~EHCI_PS_PE;
 				ehci_writel(status_reg, reg);

drivers/usb/host/ehci.h

@@ -8,6 +8,7 @@
 #ifndef USB_EHCI_H
 #define USB_EHCI_H
 
+#include <stdbool.h>
 #include <usb.h>
 #include <generic-phy.h>
 
@@ -66,6 +67,8 @@ struct ehci_hcor {
 #define PORTSC_PSPD_FS			0x0
 #define PORTSC_PSPD_LS			0x1
 #define PORTSC_PSPD_HS			0x2
+#define PORTSC_FSL_PFSC		BIT(24) /* PFSC bit to disable HS chirping */
+
 	uint32_t or_systune;
 } __attribute__ ((packed, aligned(4)));
 
@@ -251,6 +254,7 @@ struct ehci_ctrl {
 	uint32_t *periodic_list;
 	int periodic_schedules;
 	int ntds;
+	bool has_fsl_erratum_a005275;	/* Freescale HS silicon quirk */
 	struct ehci_ops ops;
 	void *priv;	/* client's private data */
 };

include/fsl_usb.h

@@ -87,6 +87,7 @@ struct ccsr_usb_phy {
 /* USB Erratum Checking code */
 #if defined(CONFIG_PPC) || defined(CONFIG_ARM)
 bool has_dual_phy(void);
+bool has_erratum_a005275(void);
 bool has_erratum_a006261(void);
 bool has_erratum_a007075(void);
 bool has_erratum_a007798(void);