usb: ehci: rmobile: Add support ehci host driver of rmobile SoCs

The rmobile SoC has usb host controller.
This supports USB controllers listed in the R8A7790, R8A7791 and R8A7740.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Reviewed-by: Marek Vasut <marex@denx.de>

3 files changed, 278 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-rmobile/ehci-rmobile.h b/arch/arm/include/asm/arch-rmobile/ehci-rmobile.h
new file mode 100644
index 0000000..463654e
--- /dev/null
+++ b/arch/arm/include/asm/arch-rmobile/ehci-rmobile.h
@@ -0,0 +1,147 @@
+/*
+ *  Copyright (C) 2013,2014 Renesas Electronics Corporation
+ *  Copyright (C) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ *
+ *  SPDX-License-Identifier:     GPL-2.0
+ */
+
+#ifndef __EHCI_RMOBILE_H__
+#define __EHCI_RMOBILE_H__
+
+/* Register offset */
+#define OHCI_OFFSET	0x00
+#define OHCI_SIZE	0x1000
+#define EHCI_OFFSET	0x1000
+#define EHCI_SIZE	0x1000
+
+#define EHCI_USBCMD	(EHCI_OFFSET + 0x0020)
+
+/* USBCTR */
+#define DIRPD		(1 << 8)
+#define PLL_RST		(1 << 2)
+#define PCICLK_MASK	(1 << 1)
+#define USBH_RST	(1 << 0)
+
+/* CMND_STS */
+#define SERREN		(1 << 8)
+#define PERREN		(1 << 6)
+#define MASTEREN	(1 << 2)
+#define MEMEN		(1 << 1)
+
+/* PCIAHB_WIN1_CTR and PCIAHB_WIN2_CTR */
+#define PCIAHB_WIN_PREFETCH	((1 << 1)|(1 << 0))
+
+/* AHBPCI_WIN1_CTR */
+#define PCIWIN1_PCICMD		((1 << 3)|(1 << 1))
+#define AHB_CFG_AHBPCI		0x40000000
+#define AHB_CFG_HOST		0x80000000
+
+/* AHBPCI_WIN2_CTR */
+#define PCIWIN2_PCICMD		((1 << 2)|(1 << 1))
+
+/* PCI_INT_ENABLE */
+#define USBH_PMEEN		(1 << 19)
+#define USBH_INTBEN		(1 << 17)
+#define USBH_INTAEN		(1 << 16)
+
+/* AHB_BUS_CTR */
+#define SMODE_READY_CTR		(1 << 17)
+#define SMODE_READ_BURST	(1 << 16)
+#define MMODE_HBUSREQ		(1 << 7)
+#define MMODE_BOUNDARY		((1 << 6)|(1 << 5))
+#define MMODE_BURST_WIDTH	((1 << 4)|(1 << 3))
+#define MMODE_SINGLE_MODE	((1 << 4)|(1 << 3))
+#define MMODE_WR_INCR		(1 << 2)
+#define MMODE_BYTE_BURST	(1 << 1)
+#define MMODE_HTRANS		(1 << 0)
+
+/* PCI_ARBITER_CTR */
+#define PCIBUS_PARK_TIMER       0x00FF0000
+#define PCIBUS_PARK_TIMER_SET   0x00070000
+#define PCIBP_MODE		(1 << 12)
+#define PCIREQ7                 (1 << 7)
+#define PCIREQ6                 (1 << 6)
+#define PCIREQ5                 (1 << 5)
+#define PCIREQ4                 (1 << 4)
+#define PCIREQ3                 (1 << 3)
+#define PCIREQ2                 (1 << 2)
+#define PCIREQ1                 (1 << 1)
+#define PCIREQ0                 (1 << 0)
+
+#define SMSTPCR7        0xE615014C
+#define SMSTPCR703      (1 << 3)
+
+/* Init AHB master and slave functions of the host logic */
+#define AHB_BUS_CTR_INIT \
+	(SMODE_READY_CTR | MMODE_HBUSREQ | MMODE_WR_INCR | \
+	 MMODE_BYTE_BURST | MMODE_HTRANS)
+
+#define USBCTR_WIN_SIZE_1GB	0x800
+
+/* PCI Configuration Registers */
+#define PCI_CONF_OHCI_OFFSET	0x10000
+#define PCI_CONF_EHCI_OFFSET	0x10100
+struct ahb_pciconf {
+	u32 vid_did;
+	u32 cmnd_sts;
+	u32 rev;
+	u32 cache_line;
+	u32 basead;
+};
+
+/* PCI Configuration Registers for AHB-PCI Bridge Registers */
+#define PCI_CONF_AHBPCI_OFFSET	0x10000
+struct ahbconf_pci_bridge {
+	u32 vid_did;		/* 0x00 */
+	u32 cmnd_sts;
+	u32 revid_cc;
+	u32 cls_lt_ht_bist;
+	u32 basead;		/* 0x10 */
+	u32 win1_basead;
+	u32 win2_basead;
+	u32 dummy0[5];
+	u32 ssvdi_ssid;		/* 0x2C */
+	u32 dummy1[4];
+	u32 intr_line_pin;
+};
+
+/* AHB-PCI Bridge PCI Communication Registers */
+#define AHBPCI_OFFSET	0x10800
+struct ahbcom_pci_bridge {
+	u32 pciahb_win1_ctr;	/* 0x00 */
+	u32 pciahb_win2_ctr;
+	u32 pciahb_dct_ctr;
+	u32 dummy0;
+	u32 ahbpci_win1_ctr;	/* 0x10 */
+	u32 ahbpci_win2_ctr;
+	u32 dummy1;
+	u32 ahbpci_dct_ctr;
+	u32 pci_int_enable;	/* 0x20 */
+	u32 pci_int_status;
+	u32 dummy2[2];
+	u32 ahb_bus_ctr;	/* 0x30 */
+	u32 usbctr;
+	u32 dummy3[2];
+	u32 pci_arbiter_ctr;	/* 0x40 */
+	u32 dummy4;
+	u32 pci_unit_rev;	/* 0x48 */
+};
+
+struct rmobile_ehci_reg {
+	u32 hciversion;		/* hciversion/caplength */
+	u32 hcsparams;		/* hcsparams */
+	u32 hccparams;		/* hccparams */
+	u32 hcsp_portroute;	/* hcsp_portroute */
+	u32 usbcmd;		/* usbcmd */
+	u32 usbsts;		/* usbsts */
+	u32 usbintr;		/* usbintr */
+	u32 frindex;		/* frindex */
+	u32 ctrldssegment;	/* ctrldssegment */
+	u32 periodiclistbase;	/* periodiclistbase */
+	u32 asynclistaddr;	/* asynclistaddr */
+	u32 dummy[9];
+	u32 configflag;		/* configflag */
+	u32 portsc;		/* portsc */
+};
+
+#endif /* __EHCI_RMOBILE_H__ */
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 578b097..b301e28 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
 obj-$(CONFIG_USB_EHCI_SPEAR) += ehci-spear.o
 obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o
 obj-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o
+obj-$(CONFIG_USB_EHCI_RMOBILE) += ehci-rmobile.o
 
 # xhci
 obj-$(CONFIG_USB_XHCI) += xhci.o xhci-mem.o xhci-ring.o
diff --git a/drivers/usb/host/ehci-rmobile.c b/drivers/usb/host/ehci-rmobile.c
new file mode 100644
index 0000000..049e4c4
--- /dev/null
+++ b/drivers/usb/host/ehci-rmobile.c
@@ -0,0 +1,130 @@
+/*
+ *  EHCI HCD (Host Controller Driver) for USB.
+ *
+ *  Copyright (C) 2013,2014 Renesas Electronics Corporation
+ *  Copyright (C) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ *
+ *  SPDX-License-Identifier:     GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/ehci-rmobile.h>
+#include "ehci.h"
+
+#if defined(CONFIG_R8A7740)
+static u32 usb_base_address[CONFIG_USB_MAX_CONTROLLER_COUNT] = {
+	0xC6700000
+};
+#elif defined(CONFIG_R8A7790)
+static u32 usb_base_address[CONFIG_USB_MAX_CONTROLLER_COUNT] = {
+	0xEE080000,	/* USB0 (EHCI) */
+	0xEE0A0000,	/* USB1 */
+	0xEE0C0000,	/* USB2 */
+	0xEE000000	/* USB3 (USB3.0 Host)*/
+};
+#elif defined(CONFIG_R8A7791)
+static u32 usb_base_address[CONFIG_USB_MAX_CONTROLLER_COUNT] = {
+	0xEE080000,	/* USB0 (EHCI) */
+	0xEE0C0000,	/* USB1 */
+	0xEE000000	/* USB3 (USB3.0 Host)*/
+};
+#else
+#error rmobile EHCI USB driver not supported on this platform
+#endif
+
+int ehci_hcd_stop(int index)
+{
+	int i;
+	u32 base;
+	struct ahbcom_pci_bridge *ahbcom_pci;
+
+	base = usb_base_address[index];
+	ahbcom_pci = (struct ahbcom_pci_bridge *)(base + AHBPCI_OFFSET);
+	writel(0, &ahbcom_pci->ahb_bus_ctr);
+
+	/* reset ehci */
+	setbits_le32(base + EHCI_USBCMD, CMD_RESET);
+	for (i = 100; i > 0; i--) {
+		if (!(readl(base + EHCI_USBCMD) & CMD_RESET))
+			break;
+		udelay(100);
+	}
+
+	if (!i)
+		printf("error : ehci(%d) reset failed.\n", index);
+
+	if (index == (CONFIG_USB_MAX_CONTROLLER_COUNT - 1))
+		setbits_le32(SMSTPCR7, SMSTPCR703);
+
+	return 0;
+}
+
+int ehci_hcd_init(int index, enum usb_init_type init,
+	struct ehci_hccr **hccr, struct ehci_hcor **hcor)
+{
+	u32 base;
+	u32 phys_base;
+	struct rmobile_ehci_reg *rehci;
+	struct ahbcom_pci_bridge *ahbcom_pci;
+	struct ahbconf_pci_bridge *ahbconf_pci;
+	struct ahb_pciconf *ahb_pciconf_ohci;
+	struct ahb_pciconf *ahb_pciconf_ehci;
+	uint32_t cap_base;
+
+	base = usb_base_address[index];
+	phys_base = base;
+	if (index == 0)
+		clrbits_le32(SMSTPCR7, SMSTPCR703);
+
+	rehci = (struct rmobile_ehci_reg *)(base + EHCI_OFFSET);
+	ahbcom_pci = (struct ahbcom_pci_bridge *)(base + AHBPCI_OFFSET);
+	ahbconf_pci =
+		(struct ahbconf_pci_bridge *)(base + PCI_CONF_AHBPCI_OFFSET);
+	ahb_pciconf_ohci = (struct ahb_pciconf *)(base + PCI_CONF_OHCI_OFFSET);
+	ahb_pciconf_ehci = (struct ahb_pciconf *)(base + PCI_CONF_EHCI_OFFSET);
+
+	/* Clock & Reset & Direct Power Down */
+	clrsetbits_le32(&ahbcom_pci->usbctr,
+			(DIRPD | PCICLK_MASK | USBH_RST), USBCTR_WIN_SIZE_1GB);
+	clrbits_le32(&ahbcom_pci->usbctr, PLL_RST);
+
+	/* AHB-PCI Bridge Communication Registers */
+	writel(AHB_BUS_CTR_INIT, &ahbcom_pci->ahb_bus_ctr);
+	writel((CONFIG_SYS_SDRAM_BASE & 0xf0000000) | PCIAHB_WIN_PREFETCH,
+	       &ahbcom_pci->pciahb_win1_ctr);
+	writel(0xf0000000 | PCIAHB_WIN_PREFETCH,
+	       &ahbcom_pci->pciahb_win2_ctr);
+	writel(phys_base | PCIWIN2_PCICMD, &ahbcom_pci->ahbpci_win2_ctr);
+
+	setbits_le32(&ahbcom_pci->pci_arbiter_ctr,
+		     PCIBP_MODE | PCIREQ1 | PCIREQ0);
+
+	/* PCI Configuration Registers for AHBPCI */
+	writel(PCIWIN1_PCICMD | AHB_CFG_AHBPCI,
+	       &ahbcom_pci->ahbpci_win1_ctr);
+	writel(phys_base + AHBPCI_OFFSET, &ahbconf_pci->basead);
+	writel(CONFIG_SYS_SDRAM_BASE & 0xf0000000, &ahbconf_pci->win1_basead);
+	writel(0xf0000000, &ahbconf_pci->win2_basead);
+	writel(SERREN | PERREN | MASTEREN | MEMEN,
+	       &ahbconf_pci->cmnd_sts);
+
+	/* PCI Configuration Registers for EHCI */
+	writel(PCIWIN1_PCICMD | AHB_CFG_HOST, &ahbcom_pci->ahbpci_win1_ctr);
+	writel(phys_base + OHCI_OFFSET, &ahb_pciconf_ohci->basead);
+	writel(phys_base + EHCI_OFFSET, &ahb_pciconf_ehci->basead);
+	writel(SERREN | PERREN | MASTEREN | MEMEN,
+	       &ahb_pciconf_ohci->cmnd_sts);
+	writel(SERREN | PERREN | MASTEREN | MEMEN,
+	       &ahb_pciconf_ehci->cmnd_sts);
+
+	/* Enable PCI interrupt */
+	setbits_le32(&ahbcom_pci->pci_int_enable,
+		     USBH_PMEEN | USBH_INTBEN | USBH_INTAEN);
+
+	*hccr = (struct ehci_hccr *)((uint32_t)&rehci->hciversion);
+	cap_base = ehci_readl(&(*hccr)->cr_capbase);
+	*hcor = (struct ehci_hcor *)((uint32_t)*hccr + HC_LENGTH(cap_base));
+
+	return 0;
+}